CN111435723B

CN111435723B - Battery connection module

Info

Publication number: CN111435723B
Application number: CN201910027006.0A
Authority: CN
Inventors: 林勇; 曾尚秀; 林健兴
Original assignee: Molex Interconnect Chengdu Co Ltd; Molex LLC
Current assignee: Molex Interconnect Chengdu Co Ltd; Molex LLC
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2022-10-11
Anticipated expiration: 2039-01-11
Also published as: CN111435723A; TWI708419B; TW202027318A

Abstract

A battery connection module is suitable for connecting a battery pack and comprises a bearing plate, a plurality of bus pieces and a circuit board. The bus pieces are arranged on the bearing disc and are suitable for being electrically connected with the battery pack. The circuit board is provided with a conducting plate, a temperature collecting piece and a temperature sensing piece, wherein the conducting plate is connected between the circuit board and the confluence piece, the temperature collecting piece is provided with a first end part arranged on the circuit board and a second end part arranged on a temperature collecting point, the conducting plate is electrically connected with a circuit trace of the circuit board, the temperature collecting piece is not electrically connected with the circuit trace of the circuit board, the temperature sensing piece and the first end part of the temperature collecting piece are adjacently arranged on the circuit board, and the temperature sensing piece is electrically connected with the circuit trace of the circuit board.

Description

Battery connection module

Technical Field

The present invention relates to a battery connection module, and more particularly, to a battery connection module for connecting a battery pack in a modularized manner.

Background

Chinese utility model patent No. CN207781834U discloses a battery collection system, and this battery collection system includes the soft board to and the temperature sensor, the first collection terminal and the second collection terminal of locating the soft board, temperature sensor pass through heat conduction insulating glue with heat conduction protective structure on the second collection terminal bonds together fixedly. Generally, the first collecting terminal for collecting voltage is usually made of nickel, and if the material of the second collecting terminal bonded to the temperature sensor is the same as that of the first collecting terminal, the accuracy of temperature collection and the temperature response time are insufficient due to the material characteristics. Moreover, if the second collecting terminal is used for voltage collection at the same time, temperature collection may be further inaccurate.

Disclosure of Invention

It is therefore an object of the present invention to provide a battery connection module that improves upon at least one of the disadvantages of the prior art.

Therefore, the battery connection module is suitable for connecting a battery pack and comprises a bearing plate, a plurality of bus pieces and a circuit board. The bus pieces are arranged on the bearing disc and are suitable for being electrically connected with the battery pack. The circuit board is provided with a conducting strip, a temperature collecting piece and a temperature sensing piece, wherein the conducting strip is connected between the circuit board and the confluence piece, the temperature collecting piece is provided with a first end part arranged on the circuit board and a second end part arranged on a temperature collecting point, the conducting strip is electrically connected with a circuit trace of the circuit board, the temperature collecting piece is not electrically connected with the circuit trace of the circuit board, the temperature sensing piece is arranged on the circuit board adjacent to the first end part of the temperature collecting piece, and the temperature sensing piece is electrically connected with the circuit trace of the circuit board.

In some embodiments, the material of the temperature collecting sheet is different from that of the conducting sheet, and the thermal conductivity of the temperature collecting sheet is better than that of the conducting sheet.

In some embodiments, the circuit board is a flexible circuit board.

In some embodiments, the first end of the temperature sensing piece is formed with an opening, and the temperature sensing member is located in the opening.

In some embodiments, the circuit board is further provided with a packaging block packaged in the temperature sensing piece.

In some embodiments, the package block covers the temperature sensing member, the opening and the first end of the temperature-sensing piece.

In some embodiments, the package block is a thermally conductive glue.

In some embodiments, the first end of the thermal patch is attached to the circuit board by an adhesive.

In some embodiments, the adhesive is a thermally conductive glue.

In some embodiments, the conductive sheet is a nickel sheet and the temperature sensing sheet is an aluminum sheet.

In some embodiments, the temperature collection point is the manifold.

In some embodiments, the temperature collection point is a casing of a cell of the battery pack.

The invention has at least the following effects: the temperature collecting sheet is not connected with a circuit trace of the circuit board, is not used for collecting voltage but only used for collecting temperature, so that temperature collection distortion caused by simultaneous voltage collection can be avoided. Furthermore, because the temperature collecting sheet adjacent to the temperature sensing piece is made of a material with a thermal conductivity superior to that of the conducting sheet, the accuracy of temperature collection of the temperature sensing piece can be improved, and the temperature response time is shortened.

Drawings

Other features and effects of the present invention will be apparent from the embodiments with reference to the accompanying drawings, in which:

fig. 1 is a perspective assembly view of a first embodiment of a battery connection module according to the present invention, illustrating the first embodiment mounted on a battery pack;

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a perspective assembly view of the first embodiment;

FIG. 4 is an exploded perspective view of FIG. 3;

FIG. 5 is a perspective view illustrating the top surface of the FPC of the first embodiment;

FIG. 6 is a perspective view illustrating the bottom surface of the FPC of the first embodiment;

fig. 7 is a perspective assembly view of a second embodiment of the battery connection module of the present invention, illustrating the second embodiment mounted on a battery pack;

FIG. 8 is a partially enlarged perspective view of FIG. 7;

FIG. 9 is a perspective view similar to FIG. 7 with portions of the bus bar omitted;

FIG. 10 is a partially enlarged perspective view of FIG. 9; and

fig. 11 is a partial cutaway perspective view of the second embodiment.

Description of the reference numerals

10. Battery connection module

1. Bearing plate

11. Dish body

111. Lower limit strip

112. Lower limiting block

113. Upper limiting block

114. Upper limit hook

115. Positioning column

116. Accommodating concave part

117. Avoiding perforation

12. Containing seat

2. Current collecting piece

21. Electrode connection part

22. Buffer part

23. Avoiding concave part

3. Electrode plate

31. Connecting segment

32. Electrode segment

4. Flexible circuit board

411. Locating hole

412. Bending buffer part

42. Conductive sheet

43. Temperature collecting sheet

431. First end part

431a opening

432. A second end part

433. Connecting part

44. Temperature sensing member

45. Packaging block

46. Support sheet

47. Mounting bar

5. Connector with a locking member

6. Battery pack

61. Battery with a battery cell

611. Electrode for electrochemical cell

612. Shell body

D1 Length direction of the film

D2 Width direction of the sheet

D3 Up and down direction

Detailed Description

Before the present invention is described in detail, it should be noted that like elements are denoted by the same reference numerals in the following description.

Referring to fig. 1 to 4, a battery connection module 10 according to a first embodiment of the present invention is adapted to be electrically connected to a battery pack 6, and the battery connection module 10 includes a carrier tray 1, a plurality of bus bars 2, two electrode plates 3, a flexible circuit board 4, and a connector 5. It should be noted that the flexible printed circuit board 4 may be replaced by a printed circuit board in other modified embodiments, which is not limited to the first embodiment.

The carrying tray 1 is a rectangular structure extending along a length direction D1 and a width direction D2, and the extending direction of the carrying tray 1 is perpendicular to an up-down direction D3 (the arrow of the up-down direction D3 in the figure faces upward, and the reverse direction is downward), the carrying tray 1 is suitable for being disposed on the battery pack 6, the carrying tray 1 includes a tray body 11 and a holding seat 12 integrally connected to an end edge of the tray body 11 located on the length direction D1. The bus bars 2 are disposed in two rows in the width direction D2 on the tray body 11 of the carrier tray 1, so as to be adapted to be mechanically and electrically connected to the electrodes 611 of the batteries 61 of the battery pack 6, and each bus bar 2 has a plurality of electrode connecting portions 21 adapted to be connected to the electrodes 611 of the batteries 61, and a plurality of buffer portions 22 connected between the adjacent electrode connecting portions 21, recessed toward the carrier tray 1, and extending in the width direction D2. The tray 11 includes a plurality of lower stoppers 111 supported below the buffer portion 22 of the bus bar 2, a plurality of lower stoppers 112 supported below the electrode connecting portion 21 of the bus bar 2, and a plurality of upper stoppers 113 and a plurality of upper stoppers 114 located above the bus bar 2, and the bus bar 2 is commonly stopped by the lower stoppers 111, the lower stoppers 112, the upper stoppers 113, and the upper stoppers 114. In the first embodiment, the bus bars 2 are mechanically and electrically connected to the electrodes 611 between the batteries 61 by welding, and the batteries 61 form a power circuit in series from head to tail by the staggered arrangement of the bus bars 2. The two ends of the two electrode plates 3 in the length direction D1 are respectively disposed on two of the bus-bars 2, each electrode plate 3 has a connecting section 31 disposed on the corresponding bus-bar 2, and an electrode section 32 extending from the connecting section 31 to the outside of the tray 11, and the electrode sections 32 are respectively used as two end points of the power circuit formed between the batteries 61.

Referring to fig. 5 and 6, the flexible printed circuit 4 has a plurality of conductive sheets 42, a plurality of Temperature collecting sheets 43, and a plurality of Temperature sensing elements 44 (e.g., NTC thermistors). The flexible circuit board 4 is disposed between the two rows of bus bars 2, and in the first embodiment, the flexible circuit board 4 is formed with a plurality of positioning holes 411, a plurality of bending buffer portions 412 recessed downward along the vertical direction D3 and extending along the width direction D2, the tray body 11 of the tray 1 further has a plurality of positioning posts 115 penetrating the positioning holes 411, a plurality of accommodating recesses 116 accommodating the bending buffer portions 412, and the positioning posts 115 form an enlarged head portion by heat melting at the end to fix the flexible circuit board 4. The conductive sheets 42 respectively correspond to the bus bars 2, and each conductive sheet 42 is connected between the flexible circuit board 4 and the corresponding bus bar 2. In the first embodiment, each temperature-sensing piece 43 corresponds to one of the bus bars 2, and each temperature-sensing piece 43 has a first end 431 disposed on the flexible circuit board 4 and a second end 432 disposed at a temperature-sensing point, which is the corresponding bus bar 2 in the first embodiment. The conductive sheets 42 are electrically connected to the voltage collecting circuit traces (not shown) of the flexible printed circuit board 4 for collecting voltage. The temperature-collecting sheets 43 are not electrically connected to the circuit traces of the flexible printed circuit board 4, and are not used for collecting voltage but only for collecting temperature, so as to avoid the distortion of temperature collection caused by collecting voltage at the same time. The temperature sensing members 44 respectively correspond to the temperature collecting plates 43, the temperature sensing members 44 are disposed on the flexible printed circuit 4 adjacent to the first end 431 of the temperature collecting plate 43, and the temperature sensing members 44 are electrically connected to a temperature collecting circuit trace (not shown) of the flexible printed circuit 4 for collecting the temperature of the bus bar 2 transmitted through the temperature collecting plates 43, for example, the temperature sensing members 44 may be mechanically and electrically connected to the temperature collecting circuit trace of the flexible printed circuit 4 by soldering. Moreover, the material of the temperature-sensing pieces 43 is different from the material of the conducting pieces 42, in an embodiment, the conducting pieces 42 are nickel pieces with good electrical conductivity, and the temperature-sensing pieces 43 are aluminum pieces with better thermal conductivity than the conducting pieces 42, so that the accuracy of temperature sensing of the temperature-sensing piece 44 can be increased, and the temperature response time can be shortened. However, in other variation, the temperature-sensing sheets 43 and the conducting sheets 42 may be made of other suitable materials according to requirements, for example, the temperature-sensing sheets 43 may also be made of other materials with better thermal conductivity, such as copper sheets, and should not be limited by the first embodiment. It should be noted that the number of the conductive sheet 42, the temperature sensing sheet 43 and the temperature sensing element 44 can be adjusted as required, and the number of the above components can be only one, which is not limited to the above-mentioned number in the first embodiment.

In the first embodiment, the first end 431 of each temperature-sensing piece 43 is disposed on the flexible circuit board 4 by an adhesive, such as a thermal conductive adhesive, but in a modified embodiment, the temperature-sensing piece 43 may be disposed on the flexible circuit board 4 by soldering, and in this modified embodiment, the flexible circuit board 4 is formed with a metal pad (not shown) for soldering with the temperature-sensing piece 43. The first end 431 of each temperature sensing piece 43 is formed with an opening 431a, and the temperature sensing member 44 is located in the opening 431 a. In other variations, the first end portion 431 of each temperature sensing piece 43 may not have the opening 431a, but a recess for accommodating the temperature sensing member 44 is formed at an edge, and even the first end portion 431 may not have the opening 431a or the recess, which should not be limited. The flexible circuit board 4 further includes a plurality of package blocks 45 respectively packaged in the temperature sensing elements 44 by, for example, a glue filling package, and a plurality of support sheets 46 respectively disposed on the other surface opposite to the disposition surface of the temperature sensing elements 44 corresponding to the temperature sensing elements 44. The temperature sensing elements 44 are protected by the package blocks 45, the package blocks 45 may be an adhesive, a thermal conductive adhesive, an anti-oxidation protective adhesive, or a combination thereof, and the material of the package blocks 45 may be, for example, silicon gel, epoxy resin, and the like, while in the first embodiment, the package blocks 45 are made of the thermal conductive adhesive. Each encapsulation block 45 covers the corresponding temperature sensing element 44, the opening 431a and the first end 431 of the temperature-sensing piece 43, and the encapsulation block 45 can help to transfer the heat energy on the first end 431 of the temperature-sensing piece 43 to the temperature sensing element 44, so as to further increase the accuracy of temperature acquisition of the temperature sensing element 44 and shorten the temperature response time. The supporting pieces 46 can be hard plates fixed by adhesives, and the supporting pieces 46 can help support the flexible circuit board 4 to prevent the solder joints between the temperature sensing elements 44 and the flexible circuit board 4 from collapsing due to bending of the flexible circuit board 4 caused by external force, so as to prevent poor contact between the temperature sensing elements and the flexible circuit board 4.

The flexible circuit board 4 has a mounting bar 47 integrally extending from an end edge and being folded, the connector 5 is disposed at a terminal of the mounting bar 47 and electrically connected to the circuit trace of the flexible circuit board 4, and a portion of the connector 5 and the mounting bar 47 are accommodated in the accommodating seat 12. The connector 5 can be connected to a battery management device (not shown) via a cable, so as to transmit the temperature information and the voltage information collected by the flexible circuit board 4 to the battery management device.

Referring to fig. 7 to 11, a second embodiment of the battery connection module 10 of the present invention is different from the first embodiment in that the second end 432 of each temperature sensing piece 43 in the second embodiment is provided with a temperature sensing point of the case 612 of the battery 61 of the battery pack 6. Each temperature sensing piece 43 further has a connecting portion 433 integrally and vertically connected to the first end portion 431 and the second end portion 432, the second end portion 432 is lower than the first end portion 431, the connecting portion 433 and the second end portion 432 of the temperature sensing piece 43 pass through the bus bar 2 and the carrier tray 1, and the second end portion 432 is disposed on the housing 612 of the battery 61 of the battery pack 6 by, for example, welding. Furthermore, the bus bar 2 corresponding to the positions of the temperature collecting sheets 43 is respectively formed with a relief recess 23 for the connection portion 433 and the second end portion 432 of the temperature collecting sheet 43 to pass through, and the tray body 11 of the susceptor 1 is formed with a plurality of relief through holes 117 for the connection portion 433 and the second end portion 432 of the temperature collecting sheet 43 to pass through. In other modified embodiments, the bus bar 2 may not have the relief recess 23 and the plate body 11 of the susceptor 1 may not have the relief through hole 117 as long as the bus bar 2 and the plate body 11 of the susceptor 1 do not shield the heat collecting plate 43. By directly contacting the second end 432 to the housing 612 of the battery 61 to collect temperature, the speed of temperature collection is further increased and the temperature response time is shortened.

In summary, the temperature-collecting sheet 43 of the present invention is not connected to the circuit trace of the circuit board, and therefore is not used for collecting voltage but is used for collecting temperature, so as to avoid the distortion of temperature collection caused by collecting voltage at the same time. Furthermore, since the temperature collecting sheet 43 adjacent to the temperature sensing member 44 is made of a different material having a thermal conductivity superior to that of the conductive sheet 42, the accuracy of temperature collection of the temperature sensing member 44 can be increased, and the temperature response time can be shortened.

However, the above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the contents of the patent specification of the present invention are still included in the scope covered by the present invention.

Claims

1. A battery connection module adapted to connect to a battery pack, the battery connection module comprising:

a carrier tray;

a plurality of bus pieces arranged on the bearing disc and suitable for being electrically connected with the battery pack; and

the flexible circuit board is provided with conducting strips, a temperature collecting piece and a temperature sensing piece, wherein the conducting strips respectively correspond to the plurality of bus pieces, each conducting strip is connected between the flexible circuit board and each bus piece, the temperature collecting piece is provided with a first end part arranged on the flexible circuit board and a second end part arranged at a temperature collecting point, the conducting strips are electrically connected with a circuit trace of the flexible circuit board, the temperature collecting piece is not electrically connected with the circuit trace of the circuit board, the temperature sensing piece and the first end part of the temperature collecting piece are adjacently arranged on the circuit board, and the temperature sensing piece is electrically connected with the circuit trace of the circuit board; the flexible circuit board is provided with support sheets which are respectively arranged on the other surface opposite to the arrangement surface of the temperature sensing piece corresponding to the temperature sensing piece.

2. The battery connection module according to claim 1, wherein the temperature sensing piece is made of a material different from that of the conductive sheet, and has a thermal conductivity superior to that of the conductive sheet.

3. The battery connection module according to any one of claims 1 to 2, wherein the first end of the temperature sensing piece is formed with an opening in which the temperature sensing member is located.

4. The battery connection module according to claim 3, wherein the FPC further comprises a package block encapsulated in the temperature sensor.

5. The battery connection module of claim 4, wherein the encapsulation block covers the temperature sensing member, the opening, and the first end of the temperature sensing tab.

6. The battery connection module according to claim 5, wherein the encapsulation block is a thermally conductive paste.

7. The battery connection module according to any one of claims 1 to 2, wherein the first end of the temperature-sensing piece is disposed on the flexible printed circuit board by an adhesive.

8. The battery connection module according to claim 7, wherein the adhesive is a thermally conductive adhesive.

9. The battery connection module according to any one of claims 1 to 2, wherein the conductive sheet is a nickel sheet and the temperature sensing sheet is an aluminum sheet.

10. The battery connection module according to any one of claims 1 to 2, wherein the temperature collection point is the bus bar.

11. The battery connection module according to any one of claims 1 to 2, wherein the temperature collection point is a case of a battery of the battery pack.