JP3556875B2 - Battery and manufacturing method thereof - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present inventionbatteryMore particularly, the present invention relates to a technique suitable for a small portable device such as a mobile phone.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as shown in FIG. 17, a battery of a portable telephone such as a portable telephone or a PHS (simplified portable telephone) has a component 2 such as an IC attached to a side surface of a battery cell 1 to control charging and electrically control the battery. A circuit board 3 for protection is arranged via an insulating sheet 4 and a spacer 5 and a positive electrode terminal 6 spot-welded to an electrode at one end of the circuit board 3 is connected to a positive electrode (not shown) of the battery cell 1. The negative electrode terminal 7 spot-welded to the electrode at the other end of the circuit board 3 is spot-welded to the negative electrode 8 of the battery cell 1, and the positive electrode terminal 6 and the negative electrode terminal 7 are respectively connected to the terminal sheet 9. A base end of a connection cord 11 having a connector 10 at a distal end extending from the circuit board 3 is fixed to the battery cell 1 with a reinforcing tape 12. The surface of the circuit board 3 is covered with a protective plate 13, and the heat shrinkable tube 14 is put on the entire battery cell 1 and the heat shrinkable tube 14 is heated to a required temperature to shrink the heat shrinkable tube 14. , A nameplate 15 indicating the model name, rating, etc. is attached. As a completed battery as shown in FIG. 18, the connector 10 is connected to the connector of the portable telephone side. It is designed to be loaded into a mobile phone.
[0003]
In addition, conventionally, as shown in FIG. 19, the positive electrode terminal 6 is spot-welded to the positive electrode of the battery cell 1 via a PTC 40 for stopping the supply of current at a high temperature or the like. The negative electrode terminal 7 is spot-welded to the negative electrode of the cell 1, and the positive electrode terminal 6 and the negative electrode terminal 7 are spot-welded to the corresponding electrodes of the circuit board 3 to electrically connect the circuit board 3 to the battery cell 1. And affixing insulating sheets 41, 42, 43, 44, 45, 46 to necessary portions of the battery cell 1, and a portable telephone (not shown) on the circuit board 3. The battery cell 1 is attached to the inner surface of the battery lid 32 with a double-sided tape 48, and the battery cell 1 is covered with a spacer 49 via a spacer 49. 20 is covered by ultrasonic welding the peripheral portion of the cover 50 to the inner surface of the battery cover 32, and furthermore, an insulating sheet 51 is attached to the surface of the cover 50 so that the battery cover 32 as shown in FIG. In some cases, a battery is configured to be integrated on the inner surface, and the battery is mounted together with the battery cover 32 on the main body of the portable telephone.
[0004]
[Problems to be solved by the invention]
However, as shown in FIG. 17 and FIG.batteryIn this case, the number of parts is large, and a large number of man-hours are required for assembling. This leads to an increase in cost.
[0005]
In addition, as shown in FIGS.batteryAs described above, as described above, the number of parts is large and a large number of man-hours are required for assembling, which leads to an increase in cost. On the other hand, since the battery cell 1 is sandwiched between the battery lid 32 and the cover 50 from both sides, the battery thickness is Thickness may become thick, which may hinder thinning.
[0006]
Further, the connection terminal 47 in the conventional battery shown in FIGS. 19 and 20 is an expensive one formed of resin and sheet metal at the same time so as not to be deformed by the spring pressure of the spring terminal on the main body side of the portable telephone. It had to be mounted on the circuit board 3 of the cell 1.
[0007]
In view of such circumstances, the present invention can significantly reduce the number of parts and the number of assembling steps, can reduce costs, can not be easily disassembled by the user, and can cause short-circuiting of the terminal portion and the like. Suitable for portable devices such as portable telephones that can prevent and improve reliability.batteryAnd when the battery cell is integrated with the inner surface of the battery lid, the number of parts and the number of assembling steps can be significantly reduced, the cost can be reduced, and the user can easily disassemble the battery. It is possible to prevent the occurrence of short-circuiting of the terminal portion, to improve the reliability, and furthermore, it is suitable for a portable device such as a portable telephone which can also make the battery thinner and lighter. WhatbatteryAnd a method for producing the same.
[0008]
[Means for Solving the Problems]
The present invention includes a circuit board provided at a required position of a battery cell, a positive terminal electrically connecting the circuit board and the battery cell, and a negative terminal electrically connecting the circuit board and the battery cell. WasbatteryWherein at least the circuit board of the circuit board, the positive terminal, and the negative terminalPart withCovered with resinIntegrated resin molding on battery cellCharacterized by being formedbatteryIt depends on.
[0009]
SaidbatteryIn this case, it is effective to use polyamide or polyurethane as the resin.
[0010]
In addition, the position where the circuit board is provided with respect to the battery cell is located at an end in the width direction of the upper surface of the battery cell, and a thin part is arranged on a portion of the upper surface width direction of the battery cell on the circuit board. In addition, a thick part is disposed at a portion on the side of the width direction of the upper surface of the battery cell on the circuit board, and a resin molded portion that covers the circuit board and is formed on the upper surface of the battery cell has a central portion in the width direction of the battery cell upper surface. May be provided such that the thickness decreases as the distance from the object approaches.
[0011]
Furthermore, the position where the circuit board is provided for the battery cell can be set to the side surface of the battery cell.
[0012]
Further, according to the present invention, a circuit board is provided at a required position of a battery cell, and after the circuit board and the battery cell are electrically connected via a positive electrode terminal and a negative electrode terminal, the battery cell is installed in a mold. And pour the resin into at least the circuit board, the positive terminal, and the negative terminal.Part withWith resinAnd integrally mold the resin molding on the battery cellThe present invention relates to a method for manufacturing a battery.
[0013]
In the battery manufacturing method, polyamide or polyurethane is used as the resin.handIt is desirable to perform coating molding.
[0014]
The present invention also provides a circuit board provided at a required position of the battery cell, a positive terminal electrically connecting the circuit board and the battery cell, and a negative terminal electrically connecting the circuit board and the battery cell. And integrated into the inner surface of the battery lidbatteryWherein at least the circuit board of the circuit board, the positive terminal, and the negative terminalPart withWith a resin, and the resin is fixed to the inner surface of the battery lid by the resin.batteryIn this case as well, it is effective to use polyamide or polyurethane as the resin.
[0015]
Further, according to the present invention, a circuit board is provided at a required position of a battery cell, and the circuit board and the battery cell are electrically connected to each other through a positive electrode terminal and a negative electrode terminal. After that, the battery cover and the battery cell are placed in a mold and a resin is poured therein, and at least the circuit board of the circuit board, the positive electrode terminal, and the negative electrode terminal is provided.Part withThe present invention relates to a method for manufacturing a battery, which comprises fixing a battery cell to an inner surface of a battery lid with the resin while molding with a resin. In this case, polyamide or polyurethane is used as the resin.handIt is desirable to perform coating molding.
[0016]
According to the above means, the following effects can be obtained.
[0017]
Of the present inventionbattery, A circuit board is provided at a required position of the battery cell, and the circuit board and the battery cell are electrically connected via a positive terminal and a negative terminal.Part withIs coated with resinResin molded part on battery cell One-piece moldingAs a result, the circuit board of the battery cell is completely sealed by the resin molded portion, so that high mechanical strength and electrical strength can be obtained, and the number of parts is small and the number of man-hours required for assembly is large as compared with the related art. Is no longer required, which leads to cost reduction, but also makes it difficult for the user to disassemble, so that short-circuiting of the terminal section does not occur.
[0018]
SaidbatteryIn the case where the resin is polyamide or polyurethane, the polyamide and polyurethane have a low softening temperature and a low viscosity at the time of melting, so that molding can be performed at a lower temperature and a lower pressure as compared with general resin molding. There is no fear of adverse effects on the circuit board due to heat or injection pressure, and the equipment required for manufacturing can be simplified and the time spent for molding can be reduced.
[0019]
In addition, the battery cell has a tendency to expand in a convex shape at the center thereof with an increase in the surrounding temperature, and the position where the circuit board is provided for the battery cell is located at an end in the width direction of the upper surface of the battery cell. A thin component is arranged on a portion of the circuit board on the center side in the width direction of the battery cell upper surface, and a thick component is arranged on a portion of the battery cell upper surface in the width direction end portion on the circuit board, If the resin molded portion that covers the circuit board and is formed on the upper surface of the battery cell is provided with an inclined surface whose thickness becomes smaller as approaching the central portion in the width direction of the upper surface of the battery cell, it is temporarily left in a car or the like under the scorching sun. Even if the battery cell expands in a high-temperature atmosphere, there is no concern that the effect will appear on a portable device equipped with the battery cell.
[0020]
Furthermore, if the position where the circuit board is provided with respect to the battery cell is located on the side surface of the battery cell, the battery cell is mounted even if the center of the battery cell expands in a convex shape as the temperature around the battery cell increases. There is no need to worry about the effects on mobile devices.
[0021]
In the method for manufacturing a battery according to the present invention, a circuit board is provided at a required position of the battery cell, and after the circuit board and the battery cell are electrically connected to each other through a positive electrode terminal and a negative electrode terminal, The battery cell is placed in the mold and the resin is poured, and at least the circuit boardPart withIs molded with resinThen, the resin molded part is integrally molded with the battery cell,A highly reliable battery having high mechanical strength and electrical strength can be stably manufactured while reducing costs.
[0022]
In the method for manufacturing a battery, polyamide or polyurethane is used as a resin.handWhen the cover molding is performed, it is possible to prevent the circuit board from being adversely affected by heat or injection pressure, and it is also possible to simplify the manufacturing apparatus and reduce the time spent for molding.
[0023]
On the other hand, it is integrated with the battery lid inner surface of the present invention.battery, At least the circuit board, the positive terminal, and the negative terminalPart withIs covered with a resin, and the battery cell is fixed to the inner surface of the battery lid by the resin. As a result, the circuit board of the battery cell is completely sealed by the resin molded portion, so that high mechanical strength and electric strength can be obtained. In addition to the conventional method, the number of parts is small and a large number of man-hours are not required for assembling, which leads to cost reduction. On the other hand, since the user cannot easily disassemble, short-circuiting of the terminal portion does not occur. Since the battery cell does not need to be sandwiched between the battery cover and the cover from both sides, the thickness of the battery does not increase, and the battery can be made thinner and lighter, and the input / output terminals mounted on the battery cell circuit board Since the circuit board is securely fixed with resin even if it has a simple structure of sheet metal processing, sufficient strength can be maintained and cost Reduction also becomes possible, also, thebatteryIn the case where the resin is polyamide or polyurethane, the polyamide and polyurethane have a low softening temperature and a low viscosity at the time of melting, so that molding can be performed at a lower temperature and a lower pressure as compared with general resin molding. There is no fear of adverse effects on the circuit board due to heat or injection pressure, and the equipment required for manufacturing can be simplified and the time spent for molding can be reduced.
[0024]
In the method for manufacturing a battery integrated with the inner surface of a battery cover according to the present invention, a circuit board is provided at a required position of the battery cell, and the circuit board and the battery cell are connected via a positive terminal and a negative terminal. After being electrically connected and the battery cell is disposed on the inner surface of the battery lid, the battery lid and the battery cell are placed in a mold, and resin is poured therein. , At least the circuit boardPart withWhile the resin is coated with resin, the battery cell is fixed to the inner surface of the battery lid by the resin. As a result, the battery lid and the battery cell are pressed by a mold in the manufacturing process, so that the battery lid is warped and the battery cell is expanded. It is possible to stably manufacture a battery having high mechanical strength and electrical strength and high reliability and dimensional accuracy while reducing costs, and further, in the method for manufacturing the battery, Use polyamide or polyurethane as resinhandWhen the cover molding is performed, it is possible to prevent the circuit board from being adversely affected by heat or injection pressure, and it is also possible to simplify the manufacturing apparatus and reduce the time spent for molding.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0026]
FIGS. 1 to 4 show an example of an embodiment of the present invention. In the drawings, portions denoted by the same reference numerals as those in FIGS. 17 and 18 represent the same components.
[0027]
In the illustrated example, as shown in FIG. 1, the circuit board 3 is adhered to the upper end in the width direction of the battery cell 1 with a double-sided tape 16 such as a polyethylene sheet, and the electrode at one end of the circuit board 3 is connected to the battery cell 1. The positive electrode 1 is electrically connected by spot welding the positive electrode terminal 6 and the electrode at the other end of the circuit board 3 and the negative electrode 8 of the battery cell 1 are spot-welded to the negative electrode terminal 7 by spot welding. The battery cells 1 assembled as shown in FIG. 2 and attached with the circuit board 3 are placed in dies 17a and 17b made of a metal such as an aluminum alloy as shown in FIG. The circuit board 3 and the positive terminal 6 and the negative terminal 7Part withWith resin, and as shown in FIG.Battery cell 1Resin molding part 29One-piece moldingThen, on the lower surface of the battery cell 1, a name plate 15 indicating a model name, a rating, and the like is stuck to complete the battery.
[0028]
As shown in FIG. 3, the mold 17a has a battery mounting groove 18 for accommodating the battery cell 1 to which the circuit board 3 is attached, a cord drawing groove 19a for drawing out the connection cord 11 extending from the circuit board 3, and A positive terminal covering resin filling groove 20 filled with a resin covering the positive terminal 6 of the battery cell 1; a negative terminal covering resin filling groove 21 filled with a resin covering the negative terminal 7 of the battery cell 1; A resin injection groove 22a for resin injection and a guide pin 23 for positioning with respect to the mold 17b are provided, and a bottom of the battery mounting groove 18 of the mold 17a is provided after resin molding on the surface of the battery cell 1 is completed. An opening 24 for pushing the battery cell 1 out of the battery mounting groove 18 of the mold 17a is provided.
[0029]
As shown in FIG. 3, the mold 17b is filled with a resin that covers the circuit board 3 of the battery cell 1, and the positive terminal covering resin filling groove 20 and the negative terminal covering resin filling groove of the mold 17a. The resin filling groove 25 is aligned with the circuit board covering resin filling groove 25 communicating with the resin wiring groove 21, the code drawing groove 19b for drawing out the connection cord 11, and the resin filling groove 22a of the mold 17a. And a guide hole 26 for positioning into which the guide pin 23 of the mold 17a is fitted.
[0030]
The battery cell 1 is usually covered with a shell made of aluminum or the like. In the manufacturing process, after the battery member is filled in a shell in which the negative electrode 8 side of the battery cell 1 is opened, finally, The opening of the shell is covered with a lid and the outer peripheral portion thereof is laser-welded, and the size of the welded portion varies. In order to absorb the variation in the size, the battery mounting of the mold 17a is performed. An elastic member 27 made of a silicon-based sponge or the like that withstands the melting temperature of the resin is embedded in the bottom and both sides of the groove 18 on the side of the negative electrode terminal coating resin filling groove 21, and at the corresponding position of the mold 17 b. An elastic member 28 of the same material is embedded.
[0031]
On the other hand, the resin molded portion 29 formed on the upper surface of the battery cell 1 is provided with an inclined surface 30 whose thickness becomes smaller as approaching the central portion in the width direction of the upper surface of the battery cell 1. For the sake of simplicity, the arrangement of components such as ICs on the circuit board 3 embedded in the resin molded portion 29 formed on the upper surface of the battery cell 1 is, as shown in FIG. A thin part 2a is arranged on the side part, and a thick part 2b is arranged on the end part in the width direction of the upper surface of the battery cell 1.
[0032]
Next, a procedure for manufacturing the battery in the illustrated example will be described.
[0033]
First, as shown in FIG. 1, a circuit board 3 is attached to an end in the width direction of the upper surface of the battery cell 1 by a double-sided tape 16 such as a polyethylene sheet, and an electrode at one end of the circuit board 3 and the battery cell 1 The positive electrode is electrically connected by spot welding the positive electrode terminal 6, and the electrode at the other end of the circuit board 3 and the negative electrode 8 of the battery cell 1 are electrically connected by spot welding the negative electrode terminal 7. After connection, the battery cell 1 is assembled as shown in FIG.
[0034]
Subsequently, as shown in FIG. 3, the battery cell 1 to which the circuit board 3 is attached is inserted into the battery mounting groove 18 of the mold 17a, and the connection cord 11 of the battery cell 1 is connected to the mold through the cord drawing groove 19a. The molds 17a and 17b are integrated so that the guide holes 26 of the mold 17b fit into the guide pins 23 for positioning the mold 17a in a state where the molds 17a are pulled out of the mold 17a. A resin such as polyamide is injected through the resin injection grooves 22a and 22b. Here, the bottom and both sides of the battery mounting groove 18 of the mold 17a on the side of the negative electrode terminal coating resin filling groove 21 and the corresponding position of the mold 17b are provided with a silicone sponge or the like that can withstand the melting temperature of the resin. Since the elastic members 27 and 28 are embedded, even if the dimensions of the shell of the battery cell 1 vary at the welded portions, the variations of the dimensions are absorbed by the elastic members 27 and 28.
[0035]
When a resin such as polyamide is injected from the resin injection grooves 22a and 22b, the resin is filled into the circuit board coating resin filling groove 25, and the positive terminal coating resin filling groove 20 and the negative electrode terminal coating resin filling groove 21 are filled. Is also filled.
[0036]
When a polyamide is used as the resin, the polyamide has a low softening temperature and a low viscosity at the time of melting, so that the molding can be performed at a lower temperature and a lower pressure as compared with general resin molding, whereby heat and injection can be performed. There is no fear of adverse effects on the circuit board 3 due to the pressure, and the apparatus required for manufacturing can be simplified and the time spent for molding can be reduced. When a moisture-curable polyurethane resin is used as the resin, molding at a low temperature and low pressure is possible as in the case of the polyamide. This polyurethane resin has a molding temperature of about 130 ° C., which is even lower than a polyamide resin having a molding temperature of about 210 ° C. Therefore, when polyurethane is used as the resin, not only does it have no adverse effect on the circuit board, but it is extremely effective for resin molding of a battery cell that is easily degraded at high temperatures, such as a polymer battery.
[0037]
After the resin filled in the circuit board covering resin filling groove 25, the positive terminal covering resin filling groove 20, and the negative terminal covering resin filling groove 21 is cured, the fixing by the jig is released and the metal is removed from the mold 17a. When the mold 17b is removed and the battery cell 1 is pushed out from the opening 24 of the mold 17a and taken out from the battery mounting groove 18, the circuit board 3, the positive terminal 6, the negative terminal 7, and thePart withResin molding 29 covering the battery cell 1One-piece moldingThen, a nameplate 15 indicating the model name, rating, and the like is attached to the lower surface of the battery cell 1 to complete the battery.
[0038]
As a result, the circuit board 3 of the battery cell 1 and the positive electrode terminal 6 and the negative electrode terminal 7 are completely sealed by the resin molded portion 29, so that high mechanical strength and electrical strength can be obtained, and the components can be increased as compared with the related art. Since the number of points is small and a large number of man-hours are not required for assembly, which leads to cost reduction, since the user cannot easily disassemble, short-circuiting of the terminal portion does not occur.
[0039]
In addition, the battery cell 1 has a tendency to expand convexly at the center with an increase in ambient temperature. However, as shown in FIG. 4 and FIG. Since the inclined surface 30 is provided so that the thickness becomes smaller as approaching the central portion in the width direction of the upper surface of the battery cell 1, the portable telephone 31 is left behind in a car under the hot sun and the battery cell 1 is placed in a high-temperature atmosphere. There is no worry that the influence will appear on the portable telephone 31 even if the swells. In FIG. 5, reference numeral 32 denotes a battery cover of the portable telephone 31.
[0040]
FIGS. 6 and 7 show an expansion when the inclined surface 30 is provided in the resin molded portion 29 and an expansion when the inclined surface 30 is not provided, respectively. When h2> h1, the resin molded portion 29 of the expanded battery interferes with the battery cover 32 of the portable telephone 31 when the inclined surface 30 is not provided, and in the worst case, the battery cover 32 may come off. However, when the inclined surface 30 is provided, interference between the resin molded portion 29 of the expanded battery and the battery cover 32 of the portable telephone 31 is avoided, and detachment of the battery cover 32 is also prevented.
[0041]
In this way, the number of parts and the number of assembling steps can be significantly reduced, cost can be reduced, and the user cannot easily disassemble, preventing short-circuiting of the terminal section and the like, and improving reliability. Can be achieved.
[0042]
8 and 9 are modifications of the embodiment for carrying out the present invention. In the drawings, portions denoted by the same reference numerals as those in FIGS. 1 to 4 represent the same components, and the basic configuration is shown in FIG. 4 to FIG. 4, but the feature of this illustrated example is that, as shown in FIG. 8 and FIG. 9, the position where the circuit board 3 is attached to the battery cell 1 is on the side surface of the battery cell 1, The circuit board 3, the positive terminal 6 and the negative terminal 7,Part withWith a resin such as polyamideBattery cell 1Resin molding part 29One-piece moldingThe point is to do so.
[0043]
In the case of the example shown in FIGS. 8 and 9, the circuit board 3 attached to the side surface of the battery cell 1 and the positive electrode terminal 6 and the negative electrode terminal 7 are covered with resin to form the resin molded portion 29.One-piece moldingIn view of the above, battery mounting grooves 18a and 18b for receiving the battery cells 1 with the circuit board 3 attached to the dies 17a and 17b, and cord drawing grooves 19a and 19b for drawing out the connection cords 11 extending from the circuit board 3. A positive terminal covering resin filling groove 20a, 20b filled with a resin covering the positive terminal 6 of the battery cell 1, and a negative terminal covering resin filling groove filled with a resin covering the negative terminal 7 of the battery cell 1; A resin filling groove filled with resin covering portions of the circuit board 3 of the battery cell 1 and communicating with the positive terminal covering resin filling grooves 20a and 20b and the negative terminal covering resin filling grooves 21a and 21b. 25a and 25b, and resin injection grooves 22a and 22b for injecting resin into the circuit board coating resin filling grooves 25a and 25b, Although are to be provided so as to be substantially symmetrical about the other points, there is no place almost vary from the example shown in FIGS.
[0044]
As in the example shown in FIGS. 8 and 9, the position where the circuit board 3 is attached to the battery cell 1 is set to the side of the battery cell 1, and the circuit board 3, the positive terminal 6 and the negative terminal 7Part withWith a resin such as polyamideBattery cell 1Resin molding part 29One-piece moldingHowever, the circuit board 3 and the positive and negative terminals 6 and 7 of the battery cell 1 are completely hermetically sealed by the resin molding 29 as in the example shown in FIGS. In addition to providing electrical strength, the number of parts is smaller than in the past and a large number of man-hours are not required for assembly, which leads to cost reduction. No longer occurs.
[0045]
In addition, since the resin molded portion 29 is formed on the side surface of the battery cell 1, even if the central portion of the battery cell 1 expands in a convex shape as the temperature around the battery cell 1 increases, the portable telephone 31 does not No worries about the effects.
[0046]
Thus, in the case of the examples shown in FIGS. 8 and 9 as well, the number of parts and the number of assembling steps can be significantly reduced, the cost can be reduced, and the user cannot easily disassemble, and the Can be prevented, and the reliability can be improved.
[0047]
FIGS. 10 and 11 show another modification of the embodiment of the present invention. In the drawings, portions denoted by the same reference numerals as those in FIGS. The example shown in FIGS. 1 to 4 is the same as the example shown in FIGS. 1 to 4, but the feature of this example is that, as shown in FIGS. 10 and 11, the entire battery cell 1 to which the circuit board 3 is attached is made of a resin such as polyamide. CoverTo battery cell 1Resin molding part 29One-piece moldingThe point is to do so.
[0048]
In the case of the example shown in FIGS. 10 and 11, the entire battery cell 1 is covered with resin to form a resin molded portion 29.One-piece moldingFor this reason, the mold 17a is provided with a battery mounting groove 18 'which is slightly larger than the outer shape of the battery cell 1 for covering the lower surface and the entire side surface of the battery cell 1 with resin, and at the bottom of the battery mounting groove 18'. , A support projection 33 for supporting the battery cell 1 is provided, while a mold 17b is provided with an upper surface coating resin filling groove 25 'for covering the entire upper surface of the battery cell 1 with resin. The inside is provided with a support projection 34 for contacting a required location on the upper surface of the battery cell 1 and restraining the battery cell 1 from moving in the vertical direction. There is almost no difference from the example shown in FIG.
[0049]
As shown in FIGS. 10 and 11, the entire battery cell 1 is covered with a resin to form a resin molded portion 29.One-piece moldingThen, since the circuit board 3 of the battery cell 1 and the positive electrode terminal 6 and the negative electrode terminal 7 are further improved in sealing performance by the resin molded portion 29, higher mechanical strength and electrical strength can be obtained. Since the number of parts is small and a lot of man-hours are not required for assembling, which leads to cost reduction, since the user cannot easily disassemble, short-circuiting of the terminal portion does not occur.
[0050]
Thus, also in the case of the examples shown in FIGS. 10 and 11, the number of parts and the number of assembling steps can be greatly reduced, the cost can be reduced, and the user cannot easily disassemble, and the Can be prevented, and the reliability can be improved.
[0051]
FIGS. 12 to 15 show a second embodiment of the present invention. In the drawings, portions denoted by the same reference numerals as those in FIGS. The positive electrode terminal 6 is spot-welded via a PTC 40 for stopping the supply of current when the temperature is high, and the negative terminal 7 is spot-welded to the negative electrode of the battery cell 1. Are respectively spot-welded to the corresponding electrodes of the circuit board 3 to electrically connect the circuit board 3 to the battery cell 1 and an insulating sheet for insulating the positive terminal 6 with the PTC 40 from the battery cell 1. 52 is interposed on the side surface of the battery cell 1, is mounted on the circuit board 3 via a double-sided tape 53 so as to cover a holder 54, and the battery cell 1 is attached to the inner surface of the battery lid 32 by a double-sided tape 48. The battery cell 1 attached and assembled as shown in FIG. 13 and integrated with the battery lid 32 is placed in molds 17a and 17b made of a metal such as an aluminum alloy as shown in FIG. The circuit board 3 covered with the holder 54 is coated with a resin, and the periphery of the battery cell 1 including the positive terminal 6 and the negative terminal 7 is coated with the resin. Meanwhile, the battery cell 1 is fixed to the inner surface of the battery cover 32 by the resin, and as shown in FIG.Battery cell 1Resin molding part 29One-piece moldingThen, the battery is completed.
[0052]
As shown in FIG. 12, a guide groove 56 corresponding to an input / output terminal 55 provided on the surface of the circuit board 3 is formed in the holder 54 so that the battery can be mounted on the body of the portable telephone. The guide groove 56 serves as a guide for the battery terminal on the side of the main body of the portable telephone so that both terminals can be smoothly contacted.
[0053]
As shown in FIG. 12, the double-sided tape 48 for attaching the battery cell 1 to the battery lid 32 has a frame shape with a central portion removed, and the central portion of the battery cell 1 expands at the time of full charge or high temperature. So that it can be absorbed.
[0054]
As shown in FIG. 14, the mold 17a has a battery mounting groove 18 for accommodating the battery cell 1 integrated with the battery lid 32, a resin injection groove 22a for resin injection, and a guide pin for positioning with respect to the mold 17b. An opening 24 is provided at the bottom of the battery mounting groove 18 of the mold 17a for pushing the battery out of the battery mounting groove 18 of the mold 17a after the resin molding of the battery is completed. .
[0055]
Further, as shown in FIG. 14, a resin injection groove 22b which is aligned with the resin injection groove 22a of the die 17a and injects the resin, and a guide pin 23 of the die 17a is fitted into the die 17b. Guide holes 26 for positioning, resin filling grooves 57 filled with resin injected from the resin injection grooves 22a and 22b, and reinforcing ribs 58 for reinforcing and supporting the battery lid 32 at the time of filling the resin. And a resin sealing rib 59 for defining a flow path filled with the resin and blocking the resin.
[0056]
Next, a procedure for manufacturing the battery in the illustrated example will be described.
[0057]
First, as shown in FIG. 12, the positive electrode terminal 6 is spot-welded to the positive electrode of the battery cell 1 via the PTC 40, and the negative electrode terminal 7 is spot-welded to the negative electrode of the battery cell 1. Are spot-welded to the corresponding electrodes of the circuit board 3, respectively, and the circuit board 3 is electrically connected to the battery cell 1, and the insulation for insulation between the positive terminal 6 with the PTC 40 and the battery cell 1 is provided. A sheet 52 is interposed on the side surface of the battery cell 1, attached to the circuit board 3 via a double-sided tape 53 so as to cover a holder 54, and the battery cell 1 is attached to the inner surface of the battery lid 32 with a double-sided tape 48. As shown in FIG. 13, the battery cell 1 is assembled.
[0058]
Subsequently, as shown in FIG. 14, the battery cell 1 integrated with the battery lid 32 is inserted into the battery mounting groove 18 of the mold 17a, and the mold is positioned against the guide pin 23 for positioning the mold 17a. The dies 17a and 17b are integrated so that the guide holes 26 of the 17b are fitted and fixed by a jig or the like (not shown), and a resin such as polyamide is injected from the resin injection grooves 22a and 22b.
[0059]
When a resin such as polyamide is injected from the resin injection grooves 22a and 22b, the resin flows into the inside of the holder 54, and the circuit board 3 on which the holder 54 is covered is covered with the resin and molded. Is filled in the resin filling groove 57, the periphery of the battery cell 1 including the positive electrode terminal 6 and the negative electrode terminal 7 is also covered and molded with resin, and the battery cell 1 is fixed to the inner surface of the battery cover 32 with the resin.
[0060]
When a polyamide is used as the resin, the polyamide has a low softening temperature and a low viscosity at the time of melting, so that the molding can be performed at a lower temperature and a lower pressure as compared with general resin molding, whereby heat and injection can be performed. There is no fear of adverse effects on the circuit board 3 due to the pressure, and the apparatus required for manufacturing can be simplified and the time spent for molding can be reduced. When a moisture-curable polyurethane resin is used as the resin, molding at a low temperature and low pressure is possible as in the case of the polyamide. This polyurethane resin has a molding temperature of about 130 ° C., which is even lower than a polyamide resin having a molding temperature of about 210 ° C. Therefore, when polyurethane is used as the resin, not only does it have no adverse effect on the circuit board, but it is extremely effective for resin molding of a battery cell that is easily degraded at high temperatures, such as a polymer battery.
[0061]
After the resin filled in the molds 17a and 17b is cured, the fixing by the jig is released, the mold 17b is removed from the mold 17a, and the battery cell 1 fixed to the inner surface of the battery cover 32 is removed from the mold. When the battery is pushed out from the opening 24a and taken out from the battery mounting groove 18, the resin molded portion 29 is formed as shown in FIG. 15, and the battery integrated with the battery lid 32 is completed.
[0062]
Thereby, the circuit board 3 of the battery cell 1 and the positive electrode terminal 6 and the negative electrode terminal 7 are completely sealed by the resin molded portion 29, and the battery cell 1 is fixed to the inner surface of the battery lid 32 by the resin molded portion 29. Since high mechanical strength and high electrical strength can be obtained, the number of parts is smaller than in the past, and a large number of man-hours are not required for assembly, which leads to cost reduction, while the user cannot easily disassemble. Short-circuiting of the terminal portion does not occur, and the battery cell 1 does not need to be sandwiched between the battery cover 32 and the cover 50 (see FIG. 19) from both sides. Is possible.
[0063]
In addition, the connection terminal 47 in the conventional battery shown in FIGS. 19 and 20 is an expensive one formed of resin and sheet metal at the same time so as not to be deformed by the spring pressure of the spring terminal on the main body side of the portable telephone. Although it is necessary to mount the input / output terminals 55 on the circuit board 3 of the battery cell 1 in the illustrated example, the input / output terminals 55 can be made of resin even if the circuit board 3 has a simple structure. , It is possible to maintain sufficient strength and reduce costs.
[0064]
Further, since the battery lid 32 and the battery cell 1 are pressed by the molds 17a and 17b in the manufacturing process, the warpage of the battery lid 32 and the expansion of the battery cell 1 are corrected, and a battery with high dimensional accuracy can be manufactured.
[0065]
In this way, the number of parts and the number of assembling steps can be significantly reduced, cost can be reduced, and the user cannot easily disassemble, preventing short-circuiting of the terminal section and the like, and improving reliability. In addition, the thickness and weight can be reduced, and the dimensional accuracy can be improved.
[0066]
12 to 15, the type in which the connection to the main body side of the portable telephone is made by the input / output terminal 55 has been described. As shown in FIG. Similarly to the case of the example shown in FIGS. 12 to 15, the battery cell 1 of the type that is connected to the main body of the telephone is formed with the resin molded portion 29 to integrate the battery lid 32 and the battery cell 1. This is possible, and in this case, the same operation and effect as described above can be obtained.
[0067]
Incidentally, the present inventionbatteryAnd its manufacturing method is not limited only to the above-described illustrated example,Battery cell 1Circuit board 3Part withWith a positive electrode terminal 6 and a negative electrode terminal 7.Part withIt is needless to say that various modifications can be made without departing from the gist of the present invention.
[0068]
【The invention's effect】
As described above, according to claim 1 of the present invention,batteryAccording to the method, the number of parts and the number of assembling steps can be significantly reduced, the cost can be reduced, and the user cannot easily disassemble, and the occurrence of short-circuit of the terminal portion can be prevented, and the reliability can be improved. It is possible to achieve an excellent effect that it is possible to improve the quality.
[0069]
Claim 2 of the present inventionbatteryAccording to the above, in addition to the above effects, molding can be performed at a lower temperature and lower pressure compared to general resin molding, adverse effects on the circuit board due to heat and injection pressure can be avoided, and the equipment required for manufacturing can be simplified. It is possible to obtain an excellent effect that the time spent for molding and molding can be reduced.
[0070]
Claim 3 of the present inventionbatteryAccording to the present invention, in addition to the above-described effects, an excellent effect that the influence on the portable device to which the battery cell is attached due to the expansion of the battery cell can be minimized can be obtained.
[0071]
According to claim 4 of the present inventionbatteryAccording to the present invention, in addition to the above-described effects, an excellent effect that the influence of the expansion of the battery cell on the portable device equipped with the battery cell can be completely eliminated can be obtained.
[0072]
According to the method for manufacturing a battery according to the fifth aspect of the present invention, an excellent battery having high mechanical strength and electrical strength and high reliability can be stably manufactured while reducing costs. It can be effective.
[0073]
According to the method for manufacturing a battery according to the sixth aspect of the present invention, in addition to the above-mentioned effects, it is possible to prevent the circuit board from being adversely affected by heat or injection pressure, thereby simplifying the manufacturing apparatus and reducing the time spent for molding. It is possible to achieve an excellent effect that it can be achieved.
[0074]
On the other hand, according to claim 7 of the present invention.batteryAccording to the above, when the battery cell is integrated with the inner surface of the battery cover, the number of parts and the number of assembling steps can be significantly reduced, the cost can be reduced, and the user cannot easily disassemble, The short circuit of the terminal portion can be prevented, the reliability can be improved, and the battery can be made thinner and lighter. ofbatteryAccording to the above, in addition to the above effects, molding can be performed at a lower temperature and lower pressure compared to general resin molding, adverse effects on the circuit board due to heat and injection pressure can be avoided, and the equipment required for manufacturing can be simplified. It is possible to obtain an excellent effect that the time spent for molding and molding can be reduced.
[0075]
According to the battery manufacturing method of the ninth aspect of the present invention, when the battery cell is integrated with the inner surface of the battery lid, the battery has high mechanical strength and electrical strength and high reliability and dimensional accuracy. An excellent effect that the battery can be stably manufactured while reducing the cost can be obtained. According to the method for manufacturing a battery according to claim 10 of the present invention, in addition to the above-described effects, the circuit board is heated and injected by the injection pressure. It is possible to obtain an excellent effect that it is possible to avoid adversely affecting the manufacturing process, simplify the manufacturing apparatus and shorten the time spent for molding.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view illustrating a process of assembling a circuit board and the like to a battery cell according to an example of an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a state before resin molding of a battery cell in an example of an embodiment of the present invention.
FIG. 3 is a perspective view showing a battery cell and a mold according to an example of an embodiment of the present invention.
FIG. 4 is a perspective view illustrating a state after resin molding of a battery cell in an example of an embodiment of the present invention.
FIG. 5 is a cross-sectional view of a portable telephone in which a battery cell is mounted according to an example of the embodiment of the present invention, and is a cross-sectional view illustrating a non-expanded state of the battery cell.
FIG. 6 is a cross-sectional view of a mobile phone in which a battery cell is mounted according to an example of the embodiment of the present invention, showing an expanded state when an inclined surface is provided in a resin molded portion of the battery cell. is there.
FIG. 7 is a cross-sectional view showing an expanded state in which no inclined surface is provided in the resin molded portion of the battery cell, as compared with FIG.
FIG. 8 is a perspective view illustrating a battery cell and a mold according to a modification of the embodiment of the present invention.
FIG. 9 is a perspective view illustrating a state after resin molding of a battery cell in a modification of the embodiment of the present invention.
FIG. 10 is a perspective view illustrating a battery cell and a mold according to another modification of the embodiment of the present invention.
FIG. 11 is a perspective view illustrating a state after resin molding of a battery cell in another modification of the embodiment of the present invention.
FIG. 12 is an exploded perspective view illustrating a process of assembling a circuit board and the like to a battery cell integrated with the inner surface of a battery cover in a second example of an embodiment of the present invention.
FIG. 13 is a perspective view showing a state before resin molding of a battery cell integrated with an inner surface of a battery lid in a second example of an embodiment of the present invention.
FIG. 14 is a perspective view showing a battery cell and a mold integrated with the inner surface of a battery cover in a second example of the embodiment of the present invention.
FIG. 15 is a perspective view illustrating a state after resin molding of a battery cell integrated with an inner surface of a battery cover in a second example of an embodiment of the present invention.
FIG. 16 is a perspective view showing a state after resin molding of a battery cell integrated with an inner surface of a battery lid in a modified example of the second example of the embodiment of the present invention.
FIG. 17 is an exploded perspective view illustrating a process of assembling a circuit board and the like to a battery cell in a conventional example.
FIG. 18 is a perspective view illustrating a completed state of a battery in a conventional example.
FIG. 19 is an exploded perspective view illustrating a process of assembling a circuit board and the like to a battery cell integrated with an inner surface of a battery cover in another conventional example.
FIG. 20 is a perspective view showing a completed state of a battery integrated with an inner surface of a battery cover in another example of the related art.
[Explanation of symbols]
1 Battery cell
2a parts
2b parts
3 circuit board
6 Positive terminal
7 Negative electrode terminal
8 Negative electrode
17a Mold
17b mold
29 resin molding
30 slope
31 Portable Telephone
32 Battery cover

Claims (10)

A circuit board provided in a required position of the battery cell, met battery comprising: a positive terminal and a negative terminal for electrically connecting said circuit board and the battery cell to electrically connect the circuit board and the battery cell Te, wherein of the circuit board and the positive terminal and negative terminal, a battery, characterized in that integrally molded resin portion to the battery cell by coating the portion provided with at least the circuit board with a resin. The battery according to claim 1, wherein the resin is polyamide or polyurethane. The position where the circuit board is provided with respect to the battery cell is located at an end in the width direction of the upper surface of the battery cell, and a thin part is arranged on a portion of the circuit board near the center in the width direction of the upper surface of the battery cell, and A thick component is disposed on the end of the battery cell upper surface in the width direction on the substrate, and the resin molded portion that covers the circuit board and is formed on the upper surface of the battery cell approaches the center of the battery cell upper surface in the width direction. 3. The battery according to claim 1, wherein an inclined surface is provided so that the thickness of the battery is reduced. 3. The battery according to claim 1, wherein the position where the circuit board is provided with respect to the battery cell is a side surface of the battery cell. At a required position of the battery cell, a circuit board is provided, and after the circuit board and the battery cell are electrically connected via the positive terminal and the negative terminal, the battery cell is set in a mold and resin is poured thereinto. A method of manufacturing a battery, wherein at least a portion of the circuit board, the positive electrode terminal, and the negative electrode terminal on which the circuit board is provided is covered and molded with a resin, and a resin molded portion is integrally molded with the battery cell . The method for producing a battery according to claim 5, wherein the cover molding is performed using polyamide or polyurethane as the resin. A circuit board provided at a required position of the battery cell, a positive terminal for electrically connecting the circuit board and the battery cell, and a negative terminal for electrically connecting the circuit board and the battery cell; a battery that is integrated into the one of the circuit board and the positive terminal and negative terminal, characterized in that the portion provided with at least the circuit board is fixed to the battery cell by the coated and the resin in the resin battery lid inner surface And battery . The battery according to claim 7, wherein the resin is polyamide or polyurethane. A circuit board is provided at a required position of the battery cell, the circuit board is electrically connected to the battery cell via a positive electrode terminal and a negative electrode terminal, and the battery cell is disposed on a battery lid inner surface. The cover and the battery cell are placed in a mold, resin is poured, and at least a portion of the circuit board, the positive electrode terminal, and the negative electrode terminal on which the circuit board is provided is covered and molded with the resin. A method for manufacturing a battery, wherein the battery is fixed to an inner surface of a lid. The method for producing a battery according to claim 9, wherein the cover molding is performed using polyamide or polyurethane as the resin.

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