JP5046517B2 - Manufacturing method and manufacturing apparatus for battery electrode plate - Google Patents

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a battery electrode plate.

  In the production of battery plates, the active material paste is applied to the flat core material, and the battery characteristics such as capacity are determined by the amount of the active material paste. Must be applied to the core material. In addition, since the thickness of the coated plate coated with the active material paste may affect the battery characteristics such as capacity, after drying the active material paste coated on the core material, It is necessary to make adjustments so as to obtain an appropriate thickness by rolling.

  In the step of applying the active material paste to the flat core material, as a method of applying the active material paste to the core material with an appropriate application amount, for example, the method disclosed in Patent Document 1 has been proposed. In this method, before the active material paste applied to the core material is dried in the drying step, the applied portion is irradiated with radiation and the amount of radiation transmitted is measured. Then, by measuring the coating amount based on the permeation amount, if the responsiveness of the coating control is increased and the target coating amount is out of the allowable range, the measured coating amount falls within the allowable range of the target coating amount. Thus, the coating process is feedback controlled. In the control process in Patent Document 1, an error between the target coating amount and the measured coating amount is obtained, and the coating condition is changed with respect to the error to suppress variation in the coating amount.

  In Patent Document 2, the amount of coating is measured based on the amount of transmitted radiation, and if the measured amount of coating deviates from the allowable range of the target coating amount, rotation of a metering pump that supplies the active material paste The feedback control is performed so that the measured coating amount falls within the allowable range of the target coating amount by adjusting the distance between the slit nozzle part that discharges the number and active material paste and applies it to the core material and the core material. It is disclosed.

  In Patent Document 1 and Patent Document 2 described above, the active material paste applied to the core material is dried, and the dried sheet is rolled to adjust the thickness to an appropriate thickness. Not inspected.

  However, depending on the fluctuation of the elongation rate of the core material due to the rolling of the dried plate, the size of each single plate size obtained by cutting the rolled plate after the rolling process into the assembly dimensions (single plate size) of the battery The weight of the electrode plate may fluctuate, and desired battery characteristics may not be obtained.

Japanese Patent Laid-Open No. 9-161792 JP 2002-25541 A

  The present invention provides a manufacturing method and a manufacturing apparatus capable of manufacturing an electrode plate for a battery that suppresses variations in the amount of active material paste applied after the rolling process and has an optimal amount of active material paste applied. .

This onset Ming is a method of manufacturing a battery plate formed by Nurigi the active material paste to the core material, after drying the coating already plate having Nurigi the active material paste, obtained by rolling the rolling A second surface density measurement step for measuring a second surface density at a predetermined portion of the finished plate, and a feedback step for feedback adjustment of the amount of the active material paste applied to the core material at the time of application based on the second surface density. It is characterized by including these.

Further, the present invention is obtained by drying and rolling a coated plate coated with the active material paste in a method for producing a battery electrode plate obtained by coating an active material paste on a core material. Based on the second surface density measurement step for measuring the second surface density at a predetermined portion of the rolled sheet and the second surface density, feedback adjustment of the amount of active material paste applied to the core material during coating is performed. Or a feedback step consisting of feedback adjustment of the weight of the active material paste in the rolled plate by adjusting the amount of rolling during rolling, and a method for producing a battery electrode plate, If the difference between the second surface density and the target surface density is greater than the first threshold value, the coating amount is adjusted by adjusting the coating thickness of the active material paste applied to the core during coating. When the difference is smaller than the first threshold and larger than the second threshold, which is a threshold smaller than the first threshold, the dried plate obtained by drying the coated plate coated with the active material paste. The weight of the active material paste in the rolled sheet is adjusted by adjusting the amount of rolling with respect to the sheet .

Further, the present invention is obtained by drying and rolling a coated plate coated with the active material paste in a battery electrode plate manufacturing apparatus in which an active material paste is coated on a core material. A second surface density measuring unit that measures the second surface density at a predetermined portion of the rolled sheet, and feedback for feedback adjustment of the amount of the active material paste applied to the core material at the time of application based on the second surface density. And a section .

Furthermore, the present invention can be obtained by drying and rolling a coated plate coated with the active material paste in a battery electrode plate manufacturing apparatus in which an active material paste is coated on a core material. Based on the second surface density measurement unit for measuring the second surface density at a predetermined portion of the rolled sheet and the second surface density, feedback adjustment of the amount of the active material paste applied to the core material at the time of coating, Or a feedback unit for feedback adjusting the weight of the active material paste in the rolled plate by adjusting a rolling amount at the time of rolling, wherein the feedback unit includes the second unit If the difference between the surface density and the target surface density is greater than the first threshold, the coating amount is adjusted by adjusting the coating thickness of the active material paste applied to the core material during coating, and the difference Is the first threshold When it is smaller and larger than the second threshold value, which is smaller than the first threshold value, adjusting the rolling amount with respect to the dried plate obtained by drying the coated plate coated with the active material paste The weight of the active material paste in the rolled sheet is adjusted .

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method and manufacturing apparatus of the positive plate for batteries which can suppress the dispersion | variation in the coating amount of the active material paste after a rolling process can be provided.

  The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below with reference to the drawings.

  The battery electrode plate manufacturing apparatus 100 shown in FIG. 1 applies an active material paste P to a long flat core material 1 conveyed in the longitudinal direction NT, which is dried, rolled, and then rolled. 1 is a battery electrode plate manufacturing apparatus for manufacturing a plate.

  As the core material 1, for example, a punching metal in which a large number of holes are formed in a thin metal is used. Moreover, the active material paste P uses the paste obtained by kneading | mixing a hydrogen storage alloy, a thickener, a binder, and a conductive support agent, for example. Then, the battery negative plate manufactured by the battery electrode plate manufacturing apparatus 100 is used as a negative electrode plate of an alkaline storage battery, for example.

  As shown in FIG. 1, the battery electrode plate manufacturing apparatus 100 according to the present embodiment has a long core 1 wound in a roll shape in the longitudinal direction NT, specifically, in the transport direction HT (in the drawing). Transport to the right). The battery electrode plate manufacturing apparatus 100 includes a coating device 10 that coats the active material paste P on the core 1 and a first surface density of the coated plate 1P that is obtained by coating the active material paste P. A first areal density measuring device 20 for measuring W1, a drying furnace 30 for drying the coated plate 1P, a rolling device 40 for rolling the dried plate 1D obtained by drying the coated plate 1P, And a second surface density measuring device 50 that measures the second surface density W2 of the rolled plate 1R obtained by rolling the dried plate 1D.

  In the battery electrode manufacturing apparatus 100 configured as described above, the coating apparatus 10 uses the first surface density W1 to set the coating amount of the active material paste P to the core material 1 as a target coating amount. Feedback control.

  Conventionally, for the rolled plate 1R, the coating amount and the like have not been inspected by a surface density measuring device or the like. However, each single plate obtained by cutting the rolled plate 1R after the rolling treatment into the assembly dimensions (single plate size) of the battery depending on the change in the elongation rate of the core material due to the rolling of the dried plate 1D. In some cases, the weight of the size electrode plate fluctuates, and desired battery characteristics cannot be obtained.

  Therefore, in the present embodiment, the surface density of the rolled plate 1R is also measured by the second surface density measuring device 50, and the coating amount is adjusted based on the measured surface density.

  FIG. 2 is a diagram showing a schematic configuration of the coating apparatus 10 and the first surface density measuring apparatus 20. As shown in FIG. 2, the active material paste P supplied from the supply pump 12 is stored in the tank 14. The core material 1 is guided and moved by the guide rollers 13 a, 13 b, 13 c and is introduced into the tank 14. An active material paste P is applied to both the front and back surfaces of the core material 1 when moving in the tank 14. Thereafter, the coated plate 1P is provided above the tank 14 and passes between a pair of doctor knives 15a, 15b facing each other at a predetermined interval, whereby the thickness and weight of the coated paste are adjusted. The Further, the coated plate 1P passes between a pair of opposing comb-like slits (paste removing rubber) 16a, 16b provided above the doctor knife 15, thereby applying the coated plate 1P to the coated plate 1P. The attached paste is removed in a comb shape. As shown in FIG. 3, the coated plate 1P passes through the comb-like slits 16 so that the non-zones ML1 to ML10 on which the paste is not applied to the front and back surfaces of the coated plate 1P are moved in the transport direction HT. It is formed. As a result, nine rows of coating bands PL1 to PL9 are formed in the transport direction HT on both the front and back surfaces of the coated plate 1P. By applying the paste in this way, the coated plate 1P is finally cut to an appropriate length, and further cut into each coating band PL to form nine battery negative plates. Moreover, the no-zone ML becomes a welding part for welding to the electrically-conductive member which comprises a battery.

  Returning to FIG. 2, the first surface density measuring device 20 measures the X-ray dose transmitted through the first X-ray irradiator 22 that radiates X-rays toward a predetermined region and the coated plate 1 </ b> P, and applies the coating. And a first X-ray surface density meter 24 for measuring a mass per unit area (first surface density W1) of the finished plate 1P.

  In the present embodiment, as shown in FIG. 4, the first surface density measuring device 20 irradiates X-rays in a range of 15 mm in diameter and measures the first surface density W1 of the portion. Further, the first surface density measuring device 20 includes a moving mechanism (not shown), and the moving mechanism includes the first X-ray irradiator 22 and the first X-ray surface density meter 24 in the width direction of the coated plate 1P. The entire width of the WT is reciprocated at a constant speed in the width direction WT synchronously. Therefore, the first surface density measuring device 20 relates the first surface density W1 at the plurality of first predetermined portions SB at each predetermined width direction interval WK in the width direction WT with respect to the portion on the plane of the coated plate 1P. It can be measured sequentially.

  As shown in FIG. 5, the second surface density measuring device 50 also includes a second X-ray irradiator 52 and a second X-ray surface density meter 54, and has a predetermined width in the width direction WT with respect to a portion on the plane of the rolled plate 1 </ b> R. The second surface density W2 at the plurality of second predetermined portions SC for each direction interval WK is sequentially measured.

  In the present embodiment, with respect to the portion on the plane of the core material 1 (the coated plate 1P and the rolled plate 1R), the second predetermined portion SC is the first surface so as to coincide with the first predetermined portion SB. You may adjust the arrangement | positioning of the 2nd surface density measurement apparatus 50 with respect to the density measurement apparatus 20, and the speed and timing of the movement to the width direction WT.

  Here, FIG. 4 will be further described. FIG. 4 is an explanatory diagram showing the relationship between the core material 1 (the coated plate 1P and the rolled plate 1R), the first surface density measuring device 20, and the second surface density measuring device 50. The first surface density measuring device 20 indicated by a broken line is the other end from one end edge 1SR (lower edge in the figure) in the width direction WT of the core material 1 conveyed in the conveyance direction HT (right direction in the figure). The first X-ray irradiator 22 and the first X-ray area densitometer 24 are each moved in the width direction WT within this range so as to cover up to the edge 1SL (upper edge in the figure). The same applies to the second areal density measuring apparatus 50.

  In the present embodiment, the first surface density measuring device 20 reciprocates at a constant speed in the width direction WT between the one end edge 1SR and the other end edge 1SL of the coated plate 1P. Further, the coated plate 1P is moving at a predetermined transport speed in the transport direction HT. Therefore, when the first surface density W1 is measured at predetermined time intervals, the first predetermined portion SB in which the first surface density W1 is measured among the portions on the plane of the coated plate 1P is enlarged in FIG. As shown in the drawing, the coated plates 1P are arranged in a dotted pattern on an imaginary straight line in an oblique direction intersecting both the longitudinal direction NT and the width direction WT. Further, the interval between the adjacent first predetermined parts SB is the width direction interval WK when viewed in the width direction WT. The same applies to the second areal density measuring apparatus 50.

  In the present embodiment, the total width of the core material 1 (the coated plate 1P and the rolled plate 1R) is 310 mm, the width direction interval WK is 2 mm, and the first surface density W1 from the one end edge 1SR to the other end edge 1SL The second surface density W2 is measured sequentially. Accordingly, it is possible to measure the surface density at approximately 155 locations by measuring the forward path and the return path from the one end edge 1SR to the other end edge 1SL.

  Further, as described above, the first predetermined portion SB and the second predetermined portion SC are made to be the core material 1 by adjusting the arrangement, moving speed, and timing of the second surface density measuring device 50 with respect to the first surface density measuring device 20. It can be measured for the same position above.

  Next, the rolling device 40 will be described with reference to FIG.

  As shown in FIG. 6, the rolling device 40 includes pressure adjusting rollers 42a and 42b, tension adjusting rollers 46a and 46b, and guide rollers 44a, 44b, 48a, and 48b. The pressure adjusting roller 42a and the tension adjusting rollers 46a and 46b are controlled by a roller control device (not shown) so as to move in the vertical direction V (vertical direction in the figure). The roller control device adjusts the pressure PR for the dried plate 1D by moving the pressure adjustment roller 42a in the vertical direction based on the second surface density W2. Further, the roller control device adjusts the tension TE in the longitudinal direction NT of the dried plate 1D at the rolling portion RM by moving the tension adjusting rollers 46a and 46b in the vertical direction V based on the second surface density W2. To do.

  In this way, the rolling device 40 rolls the dried plate 1D, so that the unevenness of the thickness (density) depending on the location of the active material paste P applied to both the front and back surfaces of the dried plate 1D is further improved. . As a result, when the rolled plate 1R is used as the negative electrode plate, it is possible to further prevent the deterioration of the battery characteristics due to the non-uniformity due to the location of the charge / discharge reaction.

  Next, the procedure for adjusting the coating amount based on the second surface density W2 in the present embodiment will be described with reference to the flowchart shown in FIG.

  The battery electrode plate manufacturing apparatus 100 first performs initial setting in response to the start of electrode plate manufacturing (S100). By the initial setting, the interval D between the doctor knives 15a and 15b, the pressing force PR by the pressing force adjusting roller 42a, and the initial value of the tension TE by the tension adjusting rollers 46a and 46b are set. In addition, after the initial value is set, as a fail-safe process, the battery electrode plate manufacturing apparatus 100 checks whether the initial value is set correctly. Further, the battery electrode plate manufacturing apparatus 100 checks whether the first surface density measuring device 20 and the second surface density measuring device 50 operate normally.

  Next, the battery electrode plate manufacturing apparatus 100 starts the X-ray measurement of the second surface density measuring device 50 when the rolled plate 1R moves to the measurement range of the second surface density measuring device 50 (S102). Then, the second surface density measurement data is read and the X-ray output level is determined (S104).

  Here, a method for calculating the X-ray output level will be specifically described. FIG. 8 is an example of second surface density measurement data obtained by the second surface density measuring device 50 measuring the surface density. The second surface density W2 data from the one end edge 1SR to the other end edge 1SL is sequentially measured from the leading side (right side in FIG. 4) of the rolled plate 1R in the conveying direction HT in the first measurement, second measurement,.・ This is expressed as the nth measurement. The battery electrode plate manufacturing apparatus 100 extracts the surface density data of each coating band PL from the measurement points WK1 to WK155 and divides the data for each coating band PL. This extraction may be performed, for example, by calculating a difference in surface density between adjacent measurement points WK and detecting an edge of a boundary between the no-zone ML and the coating band PL based on the magnitude of the difference. Next, the battery electrode plate manufacturing apparatus 100 obtains the average value of the surface density data at the center point of each coating band PL and the surface density data from several points on the left and right sides of the coating band PL. 2 The average surface density W2A is calculated, and the second total average surface density AW2A of all the coated bands is obtained. FIG. 9 shows an example of second average surface density data indicating the second average surface density W2A and the second total average surface density AW2A of the coating bands PL in the first to ninth rows.

  The battery electrode plate manufacturing apparatus 100 refers to the second average surface density data to obtain an average value of the past several second total average surface densities AW2A. Note that the number of second total average surface density AW2A used when determining the average value of the second total average surface density AW2A can be changed as appropriate, and when priority is given to short-term surface density changes, for example, Three. On the other hand, when giving priority to a long-term change in surface density, for example, an average value is obtained using 50 to 100 second total average surface densities AW2A. Subsequently, a difference between the average value and the reference surface density (hereinafter referred to as a second surface density difference ΔW2) is obtained, and an X-ray output level XL is obtained according to the magnitude of the second surface density difference ΔW2. The X-ray output level XL is determined in five levels, for example, level 1 to level 5. This level is determined by comparing the second surface density difference ΔW2 with predetermined thresholds TH1 to TH4. More specifically, as shown in FIG. 10, if the second surface density difference ΔW2 is smaller than the threshold value TH1, it is set to level 1, and if it is between the threshold value TH1 and the threshold value TH2, it is set to level 2. Further, if it is between the threshold value TH2 and the threshold value TH3, it is set to level 3, and if it is between the threshold value TH3 and the threshold value TH4, it is set to level 4. In addition, if it is larger than the threshold value TH4, it is set to level 5. In the present embodiment, the medium level having the smallest difference between the measured surface density and the reference surface density is assigned to level 3.

  Now, returning to FIG. 7, when the X-ray output level is determined in step S104, the battery electrode plate manufacturing apparatus 100 subsequently determines whether or not the determined X-ray output level is a medium level (level 3) ( S106). As a result of the determination, if it is not the middle level (the determination result of step S106 is negative “N”), the change amount of the coating amount is determined based on the determined X-ray output level (S108). More specifically, the battery electrode plate manufacturing apparatus 100 determines the change interval ΔD of the doctor knife interval D. For example, the change interval ΔD may be determined in advance for each level as shown in FIG. Then, the battery electrode plate manufacturing apparatus 100 adjusts the coating amount based on the determined change amount (S110). That is, the battery electrode plate manufacturing apparatus 100 adjusts the doctor knife interval D by the determined change interval ΔD. Note that “(700 μm)” shown in FIG. 11 indicates the initial value of the distance D between the doctor knives. Thereafter, the battery electrode plate manufacturing apparatus 100 interrupts the X-ray measurement for a predetermined period until the surface density with respect to the core material 1 after adjusting the doctor knife interval D is obtained (S112). If the electrode plate manufacturing apparatus 100 is in operation (the determination result of step S114 is affirmative “Y”), the processing after step S102 is continued.

  On the other hand, if the X-ray output level is the middle level (the determination result of step S106 is affirmative “Y”), there is no need to adjust the coating amount, so that the battery electrode plate manufacturing apparatus 100 is in operation. If the determination result in step S116 is affirmative “Y”, the processing after step S102 is continued.

  As described above, according to the present embodiment, the battery electrode plate manufacturing apparatus 100 measures the second surface density W2 by the second surface density measuring device 50 for the rolled plate 1R, and based on the second surface density W2. To adjust the coating amount. Thereby, depending on the fluctuation | variation of the elongation rate of the core material 1 by rolling of dry board | plate 1D, each board | plate size electrode plate obtained by cut | disconnecting rolled board 1R to the assembly dimension (single board size) of a battery is used. It is possible to prevent the weight (the amount of the active material paste applied) from fluctuating and failing to obtain desired battery characteristics.

  In the above description, the example in which the coating amount is adjusted by changing the distance D between the doctor knives based on the measured second surface density W2 has been described. However, the coating amount can also be adjusted by changing the tension TE and the applied pressure PR in the rolling device 40. Therefore, the coating amount may be adjusted by changing the tension TE or the applied pressure PR instead of the doctor knife interval D.

  FIG. 12 shows the amount of change in tension at each level when the tension TE is adjusted according to the X-ray output level. When adjusting the tension TE in accordance with the X-ray output level, the battery electrode plate manufacturing apparatus 100 moves the tension adjustment rollers 46a and 46b in the rolling device 40 in the vertical direction so as to adjust the tension in accordance with the X-ray output level. Adjust TE. Note that “2000N” shown in FIG. 12 indicates the initial value of the tension TE.

  FIG. 13 shows the amount of change in applied pressure at each level when adjusting the applied pressure PR according to the X-ray output level. When adjusting the pressing force PR according to the X-ray output level, the battery electrode plate manufacturing apparatus 100 moves the pressing force adjusting roller 42a in the rolling device 40 in the vertical direction to increase or decrease the pressing force according to the X-ray output level. Adjust pressure PR. Note that “150 t (tons)” shown in FIG. 13 indicates the initial value of the applied pressure PR.

  Further, the means for adjusting the coating amount may be appropriately switched according to the X-ray output level. That is, depending on the X-ray output level, the adjustment based on the doctor knife interval D, the adjustment based on the tension TE, or the adjustment based on the applied pressure PR may be appropriately selected. For example, if the absolute value of the second surface density difference ΔW2 is greater than a predetermined first threshold in consideration of the fact that the rate of change in the coating amount is greater when the distance D between the doctor knives is adjusted than when the tension TE is adjusted. In this case, the coating amount is changed by adjusting the distance D between the doctor knives, and the absolute value of the second surface density difference ΔW2 is smaller than a predetermined first threshold and is a predetermined threshold that is smaller than the first threshold. When the second threshold value is larger than the second threshold value, the coating amount is changed by adjusting the tension TE. FIG. 14 shows the coating amount adjustment value for each level when the doctor knife interval D or tension TE is adjusted according to the X-ray output level. In FIG. 14, the X-ray output level XL is set to nine levels from level 1 to level 9 and the middle level is set to level 5. Then, the doctor knife interval D and the change amount of the tension TE are determined as the coating amount adjustment value corresponding to each level. In this way, fine adjustment of the coating amount can be performed more accurately by selectively adjusting the distance D and the tension TE of the doctor knife in accordance with the X-ray output level.

  Furthermore, in the above, the doctor knife interval D and the change amount of the tension TE according to the level are fixed values according to the level. However, if the amount of adjustment predetermined according to the level is too small, the X-ray output level may continue to be at the highest level or the lowest level. In this case, the rolled plate 1R that does not satisfy the target coating amount continues. Therefore, as a result of the measurement of the second areal density W2, the X-ray output level is the highest level (if the level is five levels, level 5) or the lowest level (same level 1), for example, twice. Increases the amount of adjustment for that level. For example, when the X-ray output level continues level 5 twice, the battery electrode plate manufacturing apparatus 100 increases the change interval ΔD corresponding to the level 5 by several percent (for example, the change interval ΔD is set to 2). The distance D between the doctor knives is adjusted based on the doubled value. Thereby, the core material 1 which does not satisfy | fill the target coating amount can be decreased as much as possible.

  In the above, the average value of the surface density data at the center point of each coating band PL and the surface density data from several points on the left and right sides thereof is obtained, whereby the second average surface density W2A of each coating band PL is obtained. The example of calculating and determining the X-ray output level has been described. However, in the coating band PL, when the core material 1 moves in the transport direction HT, a part of the paste of the coating band PL may be peeled off to form a defective portion. When this defect portion is formed at a location away from the vicinity of the center of the coating band PL, as described above, when the X-ray output level is determined using only the surface density data near the center of each coating band PL, The rolled plate 1R including the defective portion may be determined to be normal.

  Therefore, before the X-ray output level is determined using the surface density data in the vicinity of the center of each coating zone PL, the presence or absence of a defective portion may be inspected using the surface density data. More specifically, after extracting the surface density data for each coating band PL, the presence or absence of a defective portion is inspected by inspecting the variation of each surface density data. That is, when there is a defect portion, there is surface density data that is significantly different from other surface density data. Therefore, when surface density data having a large difference exists, it is determined that there is a defective portion and is defective. If it is determined to be defective, the measurement site may be marked with a marker or the like.

  In the above description, an example in which the X-ray output level is determined using the second surface density data measured by the second surface density measuring device 50 and the coating amount is adjusted has been described. However, in addition to the second surface density data, the first surface density data measured by the first surface density measuring device 20 may be used together to adjust the coating amount. For example, a difference between the second surface density data (second total average surface density AW2A) and the first surface density data (first total average surface density AW1A) is obtained, and the X-ray output level is determined based on the difference. The coating amount may be adjusted.

It is a block diagram of the battery electrode plate manufacturing apparatus in this embodiment. It is a block diagram of the coating apparatus and 1st surface density measuring apparatus in this embodiment. It is explanatory drawing for demonstrating the negative electrode plate for batteries manufactured by the battery electrode plate manufacturing apparatus in this embodiment. It is explanatory drawing for demonstrating the relationship between the core material in a battery electrode plate manufacturing apparatus, a 1st surface density measuring apparatus, and a 2nd surface density measuring apparatus. It is a block diagram of the 2nd surface density measuring apparatus in this embodiment. It is explanatory drawing for demonstrating the rolling apparatus in this embodiment. It is a flowchart which shows the procedure in which the electrode plate manufacturing apparatus for batteries in this embodiment adjusts the coating amount based on 2nd surface density data. It is an example of the 2nd surface density measurement data obtained by a 2nd surface density measuring apparatus measuring a surface density. It is an example of the 2nd average surface density data which shows a 2nd average surface density and a 2nd total average surface density. It is explanatory drawing for demonstrating the relationship between a 2nd surface density difference and an X-ray output level. It is explanatory drawing for demonstrating the relationship between a X-ray output level and the change space | interval of a doctor knife. It is explanatory drawing for demonstrating the relationship between an X-ray output level and tension variation. It is explanatory drawing for demonstrating the relationship between an X-ray output level and applied pressure variation | change_quantity. It is explanatory drawing for demonstrating the relationship between a X-ray output level, the change space | interval of a doctor knife, and the amount of tension changes.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Coating device, 12 Supply pump, 13, 44, 48 Guide roller, 14 Tank, 15 Doctor knife, 16 Comb-like slit, 20 1st surface density measuring device, 22 1st X-ray irradiator, 24 1st X-ray surface Densimeter, 30 Drying furnace, 40 Rolling device, 42 Pressure adjusting roller, 46 Tension adjusting roller, 50 Second surface density measuring device, 52 Second X-ray irradiator, 54 Second X-ray surface density meter, 100 Electrode plate for battery Manufacturing equipment.

Claims (10)

In the method for producing a battery electrode plate, which is obtained by applying an active material paste to a core material,
A second areal density measuring step for measuring a second areal density at a predetermined portion of the rolled sheet obtained by drying and rolling the coated sheet coated with the active material paste;
Based on the second surface density, a feedback step for feedback adjustment of the amount of active material paste applied to the core material during coating ;
The manufacturing method of the electrode plate for batteries containing this. In the manufacturing method of the electrode plate for batteries of Claim 1,
Including a first surface density measuring step of measuring a first surface density at a predetermined portion of the coated plate before rolling,
In the feedback step,
A method for producing an electrode plate for a battery, comprising: feedback-adjusting an amount of active material paste applied to a core material at the time of application based on a difference between the second area density and the first area density. In the manufacturing method of the battery electrode plate according to claim 1 or 2,
In the feedback step,
A method for producing an electrode plate for a battery, wherein the coating amount is adjusted by adjusting the coating thickness of an active material paste applied to a core material during coating . In the method for producing a battery electrode plate, which is obtained by applying an active material paste to a core material,
A second areal density measuring step for measuring a second areal density at a predetermined portion of the rolled sheet obtained by drying and rolling the coated sheet coated with the active material paste;
Based on the second surface density, the weight of the active material paste in the rolled sheet is adjusted by feedback adjustment of the amount of the active material paste applied to the core material at the time of coating or by adjusting the amount of rolling at the time of rolling. A feedback process comprising feedback adjustment, and
A method for producing a battery electrode plate comprising :
In the feedback step,
When the difference between the second surface density and the target surface density is larger than the first threshold value, the coating amount is adjusted by adjusting the coating thickness of the active material paste applied to the core material during coating. When the difference is smaller than the first threshold and larger than the second threshold, which is a threshold smaller than the first threshold, the dried plate obtained by drying the coated plate coated with the active material paste. A method for producing a battery electrode plate, comprising adjusting a weight of an active material paste in a rolled plate by adjusting a rolling amount with respect to the plate. In the method for producing a battery electrode plate, which is obtained by applying an active material paste to a core material,
A coating step of applying a predetermined amount of the active material paste to the core material to form a coated plate;
Drying the active material paste on the coated plate to form a dried plate;
Rolling the dried plate with a predetermined rolling amount to form a rolled plate;
A second surface density measuring step for measuring a second surface density at a predetermined portion of the rolled plate;
An adjusting step of adjusting the amount of the active material paste applied in the applying step based on the second surface density;
A method for producing a battery electrode plate comprising In an apparatus for manufacturing a battery electrode plate in which an active material paste is applied to a core material,
A second surface density measuring unit for measuring a second surface density at a predetermined portion of the rolled plate obtained by drying and rolling the coated plate coated with the active material paste;
Based on the second surface density, a feedback unit that feedback adjusts the amount of active material paste applied to the core material during coating ;
An apparatus for manufacturing a battery electrode plate. In the manufacturing apparatus of the electrode plate for batteries according to claim 6,
The feedback unit includes:
An apparatus for producing a battery electrode plate, wherein the coating amount is adjusted by adjusting a coating thickness of an active material paste applied to a core material at the time of coating . In an apparatus for manufacturing a battery electrode plate in which an active material paste is applied to a core material,
A second surface density measuring unit for measuring a second surface density at a predetermined portion of the rolled plate obtained by drying and rolling the coated plate coated with the active material paste;
Based on the second surface density, the weight of the active material paste in the rolled plate is adjusted by feedback adjustment of the amount of active material paste applied to the core material during coating , or by adjusting the amount of rolling during rolling. A feedback section for feedback adjustment;
An apparatus for manufacturing a battery electrode plate comprising:
The feedback unit includes:
When the difference between the second surface density and the target surface density is larger than the first threshold value, the coating amount is adjusted by adjusting the coating thickness of the active material paste applied to the core material during coating. When the difference is smaller than the first threshold value and larger than the second threshold value, which is smaller than the first threshold value, the dried plate obtained by drying the coated plate coated with the active material paste An apparatus for producing an electrode plate for a battery, wherein the weight of the active material paste in the rolled sheet is adjusted by adjusting the amount of rolling with respect to the sheet. In an apparatus for manufacturing a battery electrode plate in which an active material paste is applied to a core material,
Applying a predetermined amount of the active material paste to the core material to form a coated plate; and
Drying the active material paste on the coated plate to form a dried plate; and
Rolling the dried plate with a predetermined rolling amount to form a rolled plate,
A second surface density measuring unit for measuring a second surface density at a predetermined portion of the rolled plate;
Based on the second surface density, a feedback unit that feedback adjusts the coating amount of the active material paste at the time of coating;
For manufacturing a battery electrode plate. In the method for producing a battery electrode plate, which is obtained by applying an active material paste to a core material,
A second areal density measuring step for measuring a second areal density at a predetermined portion of the rolled sheet obtained by drying and rolling the coated sheet coated with the active material paste;
A first surface density measuring step for measuring a first surface density at a predetermined portion of the coated plate before rolling;
A feedback step of feedback adjusting the amount of active material paste applied to the core based on the second surface density;
Including
In the feedback step,
A method for producing an electrode plate for a battery, comprising feedback-adjusting an amount of active material paste applied to a core material based on a difference between the second surface density and the first surface density .

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