JP5284741B2 - Battery terminal unit - Google Patents

Description

  The present invention relates to a battery terminal unit for taking out current from a battery post to the outside.

  Conventionally, Patent Document 1 discloses a technique in which a battery terminal that extracts current from a battery and a current sensor that detects current extracted from the battery are integrated. In the case of Patent Document 1, the battery terminal attached to the battery post protruding from the battery body is integrally provided above the current sensor.

However, in the case of patent document 1, the area which a battery post and a battery terminal contact is small. For this reason, there is a possibility that reliable extraction of current may be hindered, and it is difficult to ensure strength. Further, when the battery terminal is attached to the battery post, stress may be applied to the current sensor positioned between the battery and the battery terminal. For this reason, there is a problem that the magnetic characteristics of the current sensor change and the detection accuracy is lowered.
JP 2007-214088 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a battery terminal unit that has high strength, facilitates reliable extraction of current, and has high detection accuracy of a current sensor.

  In the invention according to claim 1, the inner peripheral surface of the hole portion of the second terminal member can contact the battery post. Therefore, the second terminal member contacts the battery post on the entire circumference of the hole. As a result, the battery post and the second terminal member are securely connected electrically, and the strength at the contact portion is improved. Therefore, the strength can be increased and the current can be taken out reliably and easily. Further, the first terminal member and the second terminal member are provided substantially in parallel at a predetermined interval. Therefore, the current sensor is accommodated in a space formed between the first terminal member and the second terminal member. Thereby, even if force is applied to the first terminal member and the second terminal member, the stress applied to the current sensor is reduced. As a result, in the current sensor, changes in magnetic characteristics due to deformation or stress applied to the current sensor are reduced. Therefore, the detection accuracy of the current sensor can be increased.

  In the invention according to claim 2, the first terminal member is connected to the second terminal member at the connecting portion. Thereby, a 1st terminal member and a 2nd terminal member are comprised integrally, and handling becomes easy. On the other hand, when the first terminal member and the second terminal member are connected at the connection portion, the first terminal member and the second terminal member have the same potential. Therefore, when the first terminal member and the battery post are in contact, current may flow from the battery post to the external terminal connected to the connection terminal portion via the connection portion and the second terminal member. Therefore, in the invention according to claim 2, the first terminal member forms a gap with the battery post. Thereby, the first terminal member is insulated from the battery post. Therefore, a short circuit of the current via the first terminal member is prevented, and the current detection accuracy by the current sensor can be increased.

  According to a third aspect of the present invention, the connection terminal portion is provided in the current sensor while being insulated from the current sensor. On the other hand, the second terminal member has a recess in which a connection terminal provided in the current sensor can be fitted. Thereby, by inserting the connection terminal part provided in the current sensor into the recess of the second terminal member, the current sensor and the second terminal member are integrally configured while the position is determined. That is, the position of the current sensor accommodated between the first terminal member and the second terminal member is determined by fitting the connection terminal portion and the recess. Therefore, the position of each member can be determined easily.

  In the invention according to claim 4, the buffer member is provided between the current sensor and the first terminal member and the second terminal member. Therefore, the force applied to the current sensor from the first terminal member and the second terminal member is absorbed by the buffer member. As a result, the current sensor is further reduced in change in magnetic characteristics due to deformation or stress applied to the current sensor. Therefore, the detection accuracy of the current sensor can be increased.

In the invention according to claim 5, the first terminal member is formed of an insulator. Therefore, even when connected to the second terminal member at the connection portion, a short circuit of current between the first terminal member and the second terminal member is prevented. Thereby, an electric current flows into a 2nd terminal member via the battery post inserted in the post hole of an electric current sensor. As a result, the current sensor detects the current flowing through the battery post. Therefore, the detection accuracy of the current sensor can be increased.
In the invention described in claim 6, the first terminal member is detachably provided on the second terminal member and the connecting portion. Thereby, even when it comprises a 1st terminal member by another member, it is easily assembled | attached with a 2nd terminal member. Therefore, handling can be facilitated.

Hereinafter, a plurality of embodiments of a battery terminal unit according to the present invention will be described with reference to the drawings. In addition, in each embodiment, the same code | symbol is attached | subjected to the substantially same component, and description is abbreviate | omitted.
(First embodiment)
A battery equipped with a battery terminal unit according to the first embodiment of the present invention is shown in FIG. As shown in FIG. 1, the battery 10 includes a battery main body 11 and a battery post 12. The battery body 11 contains, for example, an electrode plate and an electrolyte solution (not shown). The battery post 12 is made of a conductive metal and protrudes from the battery body 11. In general, the battery post 12 is provided so as to protrude upward from the upper end surface of the battery body 11 in the vertical direction. The battery post 12 is formed in a columnar shape or a tapered shape.

  The battery terminal unit 13 includes a battery terminal 14 and a current sensor 15 assembled to the battery terminal 14. The battery terminal 14 includes a first terminal member 21 and a second terminal member 22. The first terminal member 21 and the second terminal member 22 sandwich the current sensor 15 therebetween. That is, the first terminal member 21 and the second terminal member 22 are provided substantially in parallel at a predetermined interval, and form a space for accommodating the current sensor 15 therebetween.

  In the case of the first embodiment, the first terminal member 21 and the second terminal member 22 are connected by a connecting portion 23 provided on one end side, that is, on the left side of FIG. The connection portion 23 connects the first terminal member 21 and the second terminal member 22 in a rotatable hinge shape. The first terminal member 21 is provided closer to the battery body 11 than the current sensor 15. Thereby, the first terminal member 21 is located on the battery main body 11 side of the current sensor 15. In the case of the first embodiment, one end of the first terminal member 21 is connected to the second terminal member 22 at the connection portion 23, and the other end is connected to the second terminal member 22 at the caulking portion 24. The battery post 12 is inserted between the connection portion 23 side and the caulking portion 24 side of the first terminal member 21. The first terminal member 21 has an insertion hole 25 into which the battery post 12 is inserted. Here, the inner diameter of the insertion hole 25 is sufficiently larger than the outer diameter of the battery post 12. Therefore, the first terminal member 21 is not in contact with the battery post 12. That is, a gap is formed between the first terminal member 21 and the battery post 12. Thereby, the first terminal member 21 and the battery post 12 are insulated by a gap.

  The second terminal member 22 is formed of a conductive metal such as iron or copper, for example. The second terminal member 22 has a caulking portion 24 at an end opposite to the connection portion 23, that is, at the other end. As shown in FIGS. 1 and 2, the caulking portion 24 extends from the second terminal member 22 toward the first terminal member 21 and wraps around the battery main body 11 side of the first terminal member 21. Thereby, the 1st terminal member 21 and the 2nd terminal member 22 are integrally connected in the edge part on the opposite side to the connection part 23. FIG. Thus, the first terminal member 21 and the second terminal member 22 are integrally connected at the connection portion 23 and the caulking portion 24, and the current sensor 15 is accommodated therebetween.

  The second terminal member 22 has a hole portion 26 through which the battery post 12 passes between the connection portion 23 and the caulking portion 24. The battery post 12 is inserted into the hole 26. The inner peripheral surface of the second terminal member 22 forming the hole portion 26 can contact the outer peripheral surface of the battery post 12 inserted into the hole portion 26. Thereby, when the battery terminal unit 13 is attached to the battery 10 as shown in FIG. 1, the second terminal member 22 forming the hole 26 and the battery post 12 are electrically connected.

  As shown in FIGS. 1 and 2, the battery terminal 14 has a connection terminal portion 27 on the end side opposite to the connection portion 23, that is, on the caulking portion 24 side. The connection terminal portion 27 is attached with an external terminal (not shown) connected to the outside. The connection terminal portion 27 is formed with, for example, a male screw, and the external terminal is connected to the connection terminal portion 27 by attaching an external terminal (not shown) to the connection terminal portion 27 and tightening a nut, for example. As a result, the external terminal contacts the second terminal member 22, and the second terminal member 22 and the external terminal are electrically connected. The connection terminal portion 27 is provided to rise from the first terminal member 21 to the second terminal member 22 side, for example, by an insulator or the like. The connection terminal portion 27 attached integrally with the first terminal member 21 passes through the second terminal member 22.

  The current sensor 15 has a casing 28. The casing 28 is made of resin and accommodates an annular core (not shown) inside. The current sensor 15 is formed in a substantially annular shape having a post hole 29. In the post hole 29, the battery post 12 is inserted on the inner peripheral side. The inner diameter of the post hole 29 is larger than the outer diameter of the battery post 12. Therefore, the current sensor 15 does not contact the battery post 12 in the post hole 29. When a current flows through the battery post 12 inserted into the post hole 29, a magnetic field is generated around the battery post 12. The core of the current sensor 15 detects a magnetic field generated around the battery post 12. The current sensor 15 converts the magnetic flux detected by the core into a voltage, and outputs the converted voltage to the outside via the wiring member 31. Thus, when a current flows through the battery post 12, the current sensor 15 outputs a voltage corresponding to the current flowing through the battery post 12 from the wiring member 31 to the outside.

  The inner diameter of the post hole 29 into which the battery post 12 is inserted in the current sensor 15 is set according to the battery post 12. The diameter of each terminal of the battery post 12 is set according to, for example, the Japanese JIS standard, the US BCI standard, or the European DIN standard. The inner diameter of the post hole 29 is set according to these various standards.

  As shown in FIG. 2, the first terminal member 21 is a restriction projecting from the radially outer end toward the second terminal member 22 between the connection portion 23 and the connection terminal portion 27 in the circumferential direction of the current sensor 15. A portion 32 is provided. The second terminal member 22 has a restricting portion 33 that protrudes from the radially outer end toward the first terminal member 21 between the connecting portion 23 and the connecting terminal portion 27 in the circumferential direction of the current sensor 15. doing. The restriction part 32 of the first terminal member 21 and the restriction part 33 of the second terminal member 22 are opposed to each other with a gap therebetween as shown in FIG. In this way, the restriction portion 32 protruding from the first terminal member 21 toward the second terminal member 22 and the restriction portion 33 protruding from the second terminal member 22 toward the first terminal member 21 face each other, whereby the current sensor 15. These restricting portions 32 and 33 restrict the movement in the radial direction. Thereby, the current sensor 15 is held between the first terminal member 21 and the second terminal member 22. At this time, the current sensor 15 forms a gap between the first terminal member 21 and the second terminal member 22. The current sensor 15 has a gap between the first terminal member 21 and the second terminal member 22 by defining the positions of the wiring member 31 and the first terminal member 21 and the second terminal member 22 that support the wiring member 31, for example. Form. Thus, by forming a gap between the current sensor 15 and the first terminal member 21 and the second terminal member 22, the force transmitted from the first terminal member 21 and the second terminal member 22 to the current sensor 15 side is It is absorbed in these gaps. In addition, the current sensor 15, the first terminal member 21, A gap may be formed between the second terminal member 22 and the second terminal member 22.

  As described above, the second terminal member 22 is formed of a conductor such as metal. Therefore, when the battery terminal unit 13 is attached to the battery 10, the battery post 12 and the second terminal member 22 are electrically connected. Thereby, an electric current flows outside from the external terminal connected to the connection terminal part 27 through the battery post 12 and the 2nd terminal member 22 in order. On the other hand, the first terminal member 21 is insulated from the battery post 12 by a gap formed between the battery terminal 12 and the first terminal member 21. Thus, even when the first terminal member 21 and the second terminal member 22 are electrically connected at the connection portion 23 and the caulking portion 24, the current flowing through the battery post 12 passes through the first terminal member 21. And flows to an external terminal connected to the second terminal member 22. As a result, the current extracted from the battery 10 flows through the battery post 12 without short-circuiting from the first terminal member 21 to the second terminal member 22. Therefore, the current sensor 15 can detect the current flowing through the battery post 12.

  As described above, in the first embodiment of the present invention described above, the inner peripheral surface of the hole portion 26 of the second terminal member 22 contacts the battery post 12. Therefore, the second terminal member 22 contacts the battery post 12 on the entire circumference of the hole portion 26. Thereby, the battery post 12 and the second terminal member 22 are ensured an electrically reliable connection, and the strength at the contact portion is improved. Therefore, the strength can be increased and the current can be taken out reliably and easily. Further, the first terminal member 21 and the second terminal member 22 are provided substantially in parallel at a predetermined interval. Therefore, the current sensor 15 is accommodated in a space formed between the first terminal member 21 and the second terminal member 22. Thereby, even if force is added to the 1st terminal member 21 and the 2nd terminal member 22, the stress added to the current sensor 15 is reduced. As a result, the current sensor 15 is reduced in change in magnetic characteristics due to deformation or stress applied to the current sensor 15. Therefore, the detection accuracy of the current flowing through the battery post 12 by the current sensor 15 can be increased.

  In the first embodiment, the first terminal member 21 is connected to the second terminal member 22 at the connection portion 23. Thereby, the 1st terminal member 21 and the 2nd terminal member 22 are comprised integrally, and handling becomes easy. By the way, when the first terminal member 21 and the second terminal member 22 are connected at the connection portion 23, the first terminal member 21 and the second terminal member 22 have the same potential. Therefore, when the first terminal member 21 and the battery post 12 are in contact with each other, a current may flow from the battery post 12 to the external terminal connected to the connection terminal portion 27 via the connection portion 23 and the second terminal member 22. There is. Therefore, in the case of the first embodiment, the first terminal member 21 forms a gap with the battery post 12. Thereby, the first terminal member 21 is insulated from the battery post 12. Therefore, the short circuit of the current via the first terminal member 21 is prevented, and the current detection accuracy by the current sensor 15 can be increased.

  Furthermore, in the first embodiment, a gap is formed between the current sensor 15 and the first terminal member 21 and the second terminal member 22. Therefore, the force applied to the current sensor 15 from the first terminal member 21 and the second terminal member 22 is absorbed by the gap. As a result, the current sensor 15 is further reduced in change in magnetic characteristics due to deformation or stress applied to the current sensor 15. Therefore, the detection accuracy of the current sensor 15 can be increased.

(Second Embodiment)
A battery terminal unit according to a second embodiment of the present invention is shown in FIG.
In the second embodiment, the battery terminal unit 13 includes a buffer member 34 as shown in FIG. The buffer member 34 covers the current sensor 15 and is provided between the current sensor 15 and the first terminal member 21 and the second terminal member 22. The buffer member 34 is made of a flexible material such as rubber or urethane foam. Thereby, the impact applied to the current sensor 15 from the first terminal member 21 or the second terminal member 22 is reduced. Even if the first terminal member 21 or the second terminal member 22 is deformed, the deformation is absorbed by the buffer member 34. As a result, the stress applied to the current sensor 15 from the first terminal member 21 or the second terminal member 22 is reduced.

  As described in the first embodiment, the current sensor 15 forms a gap between the first terminal member 21 and the second terminal member 22 and has a resin casing 28. Therefore, the force applied from the first terminal member 21 or the second terminal member 22 is generally absorbed by these gaps and the casing 28. However, if the force applied to the current sensor 15 from the first terminal member 21 or the second terminal member 22 becomes excessive, the gap and the casing 28 alone may not be sufficiently absorbed.

  In the second embodiment, a buffer member 34 is provided between the current sensor 15 and the first terminal member 21 and the second terminal member 22. Therefore, the force applied to the current sensor 15 from the first terminal member 21 and the second terminal member 22 is absorbed by the buffer member 34. As a result, the current sensor 15 is further reduced in change in magnetic characteristics due to deformation or stress applied to the current sensor 15. Therefore, the detection accuracy of the current sensor 15 can be further increased.

(Third embodiment)
A battery terminal unit according to a third embodiment of the present invention is shown in FIGS.
In the third embodiment, the connection terminal portion 27 penetrates the current sensor 15 as shown in FIG. As shown in FIG. 5, the current sensor 15 has a protruding portion 35 that protrudes radially outward. The protrusion 35 is formed integrally with the resin casing 28. The connection terminal portion 27 extending from the first terminal member 21 toward the second terminal member 22 passes through a through hole 36 provided in the protruding portion 35. By inserting the connection terminal portion 27 into the through hole 36 of the current sensor 15, the current sensor 15 is held by the battery terminal 14 including the first terminal member 21 and the second terminal member 22. At the same time, a protrusion 35 of the current sensor 15 is sandwiched between the first terminal member 21 and the second terminal member 22. Therefore, the first terminal member 21 and the second terminal member 22 are insulated from each other by the protruding portion 35 that is integral with the resin casing 28.

  In the third embodiment, the first terminal member 21 and the second terminal member 22 are formed by sandwiching the protruding portion 35 of the current sensor 15 between the first terminal member 21 and the second terminal member 22 on the connection terminal portion 27 side. Insulation can be achieved. Moreover, the current sensor 15 can be held on the first terminal member 21 and the second terminal member 22, and handling can be facilitated. In the third embodiment shown in FIG. 4, the caulking portion 24 is not shown, but the caulking portion 24 may be provided.

(Fourth embodiment)
A battery terminal unit according to a fourth embodiment of the present invention is shown in FIG.
In the fourth embodiment, as shown in FIG. 6, the connection terminal portion 27 is fixed to the protruding portion 35 of the current sensor 15. The connection terminal portion 27 is insulated from the current sensor 15 by a resin protrusion 35. The 2nd terminal member 22 has the recessed part 38 by which the connection terminal part 27 provided in the current sensor 15 is engage | inserted by the caulking 24 part side. The battery terminal 14 and the current sensor 15 are assembled together by fitting the connection terminal portion 27 into the recess 38. Further, the connection terminal portion 27 fitted into the recess 38 is in contact with the second terminal member 22 that forms the recess 38. Thereby, the 2nd terminal member 22 and the connection terminal part 27 are electrically connected.

  In the fourth embodiment, the position of the current sensor 15 and the second terminal member 22 is determined by fitting the connection terminal portion 27 provided in the current sensor 15 into the recess 38 of the second terminal member 22. It is constructed integrally. That is, the position of the current sensor 15 accommodated between the first terminal member 21 and the second terminal member 22 is determined by fitting the connection terminal portion 27 and the recess 38. Therefore, the position of each member can be determined easily.

(Fifth embodiment)
A battery terminal unit according to the fifth embodiment is shown in FIG.
In the fifth embodiment, the first terminal member 21 is divided into a support part 211 on the connection part 23 side and a support part 212 on the caulking part 24 side in the vicinity of the battery post 12. That is, the first terminal member 21 is composed of separate parts in which the connection portion 23 side and the caulking portion 24 side are independent. Thus, the first terminal member 21 is insulated from the battery post 12 without contacting the battery post 12. On the other hand, the support part 211 and the support part 212 that constitute the first terminal member 21 both support the current sensor 15 from the battery body 11 side. Thereby, the current sensor 15 can determine the position with respect to the battery post 12.

(Sixth embodiment)
A battery terminal unit according to a sixth embodiment of the present invention is shown in FIG.
In the sixth embodiment, the first terminal member 41 is formed of an insulator such as rubber or resin as shown in FIG. 8, and a part of the first terminal member 41 can be detached from the second terminal member 22. The first terminal member 41 has an insertion hole 45 into which the battery post 12 is inserted at the center.

  In the case of 6th Embodiment, since the 1st terminal member 41 is formed with the insulator, even when connecting with the 2nd terminal member 22 in the connection part 23, the 1st terminal member 41 and the 2nd terminal member 22 Current short circuit between the two is prevented. Thereby, the current flows to the second terminal member 22 via the battery post 12 inserted into the post hole 29 of the current sensor 15. As a result, the current sensor 15 detects the current flowing through the battery post 12. Therefore, the detection accuracy of the current sensor 15 can be increased.

Moreover, in the case of 6th Embodiment, the 1st terminal member 41 is provided with the 2nd terminal member 22 and the connection part 23 so that attachment or detachment is possible. Thereby, even when the 1st terminal member 41 is comprised by another member, it is easily assembled | attached with the 2nd terminal member 22. FIG. Therefore, handling can be facilitated.
The present invention described above is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.

Schematic which shows the side view of the battery terminal unit by 1st Embodiment of this invention. The schematic perspective view which shows the battery terminal unit by 1st Embodiment of this invention. Schematic which shows the side view of the battery terminal unit by 2nd Embodiment of this invention. Schematic which shows the side view of the battery terminal unit by 3rd Embodiment of this invention. Schematic which shows the planar view of the current sensor of the battery terminal unit by 3rd Embodiment of this invention. It is the schematic which shows the battery terminal unit by 4th Embodiment of this invention, Comprising: (A) is a top view which shows a 2nd terminal member and a current sensor, (B) is a current sensor from the arrow B direction of (A). Viewed arrow Schematic which shows the side view of the battery terminal unit by 5th Embodiment of this invention. Schematic which shows the side view of the battery terminal unit by 6th Embodiment of this invention.

Explanation of symbols

  In the drawings, 11 is a battery body, 12 is a battery post, 13 is a battery terminal unit, 15 is a current sensor, 21 and 41 are first terminal members, 22 is a second terminal member, 23 is a connection portion, 26 is a hole portion, Reference numeral 27 denotes a connection terminal portion, 29 denotes a post hole, 34 denotes a buffer member, 38 denotes a recess, and 45 denotes an insertion hole.

Claims (6)

A battery terminal unit attached to a battery post protruding from the battery body,
A first terminal member provided on the battery body side and insulated from the battery post;
The battery is formed of a conductor, and is provided on the opposite side of the battery main body with the first terminal member in between and substantially parallel to the first terminal member at a predetermined interval, and the battery post is inserted and the inner peripheral surface is the battery. A second terminal member having a hole capable of contacting the post;
A current which is accommodated between the first terminal member and the second terminal member and has a post hole into which the battery post is inserted without contact, and which flows to the second terminal member via the battery post A current sensor for detecting
A connection terminal portion to which an external terminal for taking out current from the battery post via the second terminal member is connected;
A battery terminal unit comprising: At the end of the first terminal member and the second terminal member on the side opposite to the connection terminal portion, the first terminal member and the second terminal member are further connected,
The battery terminal unit according to claim 1, wherein a gap is formed between the first terminal member and the battery post. The connection terminal portion is insulated from the current sensor and provided to protrude from the current sensor to the opposite side of the first terminal member,
3. The battery terminal unit according to claim 1, wherein the second terminal member has a notch-shaped recess in which the connection terminal portion can be fitted in a plan view .
  4. The battery terminal according to claim 1, further comprising a buffer member provided between the current sensor and the first terminal member and the second terminal member to absorb an impact. 5. unit.   The battery terminal unit according to any one of claims 1 to 4, wherein the first terminal member is formed of an insulator.   6. The first terminal member according to claim 5, wherein the first terminal member has an insertion hole into which the battery post is inserted, and is detachably provided between the second terminal member and the connection portion. Battery terminal unit.

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