CN220753529U

CN220753529U - Battery pack

Info

Publication number: CN220753529U
Application number: CN202322369183.1U
Authority: CN
Inventors: 朋佳丽; 茆顺杰; 卢雪梅; 潘邦翠; 曹俊哲
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-04-09
Anticipated expiration: 2033-08-31

Abstract

The utility model discloses a battery pack, and belongs to the technical field of batteries. The battery pack comprises a plurality of battery cells which are arranged side by side, two pole posts of the battery cells are positioned on the same side face of the battery cells, and the battery pack further comprises an acquisition module which is arranged on the side face of the pole post of the battery cells, wherein the acquisition module comprises an FPC board, an arch structure is arranged in the middle of the FPC board along the length direction, a plurality of chips are arranged on two sides of the arch structure on the FPC board, the chips on two sides of the arch structure are arranged at intervals along the length direction of the FPC board, and the chips on two sides of the arch structure are staggered. The utility model is mainly used for effectively realizing the monitoring of the independent state information of a plurality of battery cores of the monitored battery, such as voltage monitoring, electrochemical impedance spectrum monitoring and the like.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

Electric vehicles such as electric bicycles, electric vehicles, etc. are increasingly used due to increasing energy-saving and environment-friendly demands and technological advances. More and more electric carriers replace the traditional fuel carriers and become traveling tools. The electric vehicle is the battery at the foremost core, and the battery provides necessary power for the work of all parts of the electric vehicle. The power battery is composed of a plurality of battery modules, and the stability and performance states of the power battery are determined by the battery modules and the temperature and other aspects of the battery cells, so that the safety and the functional status of the electric carrier are determined.

The current power battery module has gradually developed towards modularization, and the battery module includes battery module, collection board and from the accuse module, and battery module mainly comprises the battery, provides the electric energy for the car, and from accuse module and collection board realize voltage acquisition, temperature acquisition and communication function jointly. Through searching, chinese patent document CN206022558U discloses a power battery module collection system comprising: the power battery module is connected with the corresponding acquisition plates by signals, the acquisition plates share the slave control module, and the slave control module is arranged in any one acquisition plate sharing the slave control module. Thereby realizing the functions of voltage and temperature acquisition and communication of a battery. However, in the technical document of the patent, since the acquisition points of the acquisition system are few, the monitoring of the independent state information of a plurality of battery cells cannot be realized, meanwhile, the acquisition board and the slave control module are connected through the acquisition line, the arrangement is complex, the occupation space of the flat cable is large, and the assembly process is complex.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims to solve the defects in the prior art, and provides a battery pack, so that the problems that a plurality of battery cores cannot be monitored in independent state information due to few acquisition points, and the problems that a flat cable occupies a large space and an assembly process is complex due to complex flat cable of an acquisition cable are solved.

2. Technical proposal

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model relates to a battery pack, which comprises a plurality of battery cells arranged side by side, wherein two pole posts of the battery cells are positioned on the same side face of the battery cells; the battery pack also comprises an acquisition module, wherein the acquisition module is arranged on the side surface of the battery core electrode post; the collection module include the FPC board, FPC board middle part sets up the arch structure along length direction, set up a plurality of chips on the FPC board, the chip sets up in arch structure both sides, the chip of both sides all sets up along FPC board length direction interval, the chip of arch structure both sides staggers the setting.

As a further description of the above technical solution: one side of the chip is fixedly connected with the FPC board, the chip is integrated with a temperature sensor, and the temperature sensor is contacted with the battery cell through the FPC board.

As a further description of the above technical solution: and a mica sheet is arranged between the battery cell and the FPC board, and is attached to the arch structure position of the FPC board.

As a further description of the above technical solution: and an arch structure is arranged in the middle of the mica sheet along the length direction.

As a further description of the above technical solution: the battery cell is characterized in that an overcurrent row is arranged at the two pole positions of the battery cell, the overcurrent row is of a sheet structure, a bent part is arranged at the middle part of the overcurrent row, and the bent part divides the overcurrent row into two parts. The two parts are respectively connected with the pole posts of the adjacent battery cells.

As a further description of the above technical solution: the FPC board is also provided with a collection sheet connected with each chip; the collection piece includes first pole collection piece and second pole collection piece, first pole collection piece and second pole collection piece are through the two utmost point posts intercommunication of overcurrent row with the electric core.

As a further description of the above technical solution: the battery core pole column side is also provided with an insulating bracket, and the acquisition module and the overcurrent row are fixedly connected to the insulating bracket.

As a further description of the above technical solution: the battery is characterized in that one end of the overcurrent row is provided with a connecting and positioning hole, the overcurrent row is fixedly connected with the insulating support through the connecting and positioning hole, the other end of the overcurrent row is provided with a pole hole, and the position of the pole hole corresponds to that of the detected battery pole.

As a further description of the above technical solution: the FPC board is also provided with a first electrode connecting sheet and a second electrode connecting sheet, the first electrode connecting sheet and the second electrode connecting sheet are communicated with two poles of the battery cell, and a resistor is connected between the first electrode connecting sheet and the second electrode connecting sheet.

As a further description of the above technical solution: the acquisition module further comprises an isolation transformer and a communication plug-in unit, and the isolation transformer and the communication plug-in unit are connected to the FPC board.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) According to the battery pack, only one acquisition chip is scattered originally and is divided into a plurality of acquisition modules, so that the monitoring of the independent state information of a plurality of battery cores of the monitored battery, such as voltage monitoring, electrochemical impedance spectrum monitoring and the like, can be effectively realized. Meanwhile, the arched structure is arranged in the middle of the FPC board along the length direction, so that the heat dissipation requirement and the structure avoidance requirement of the monitored battery pack can be realized. Furthermore, the temperature sensor is integrated on the separated chip, so that the temperature monitoring of the independent battery cell is directly realized.

(2) According to the battery pack, the mica sheets are arranged between the FPC board and the battery cells, and the structural shapes of the mica sheets are designed, so that the requirements of soaking insulation and structural avoidance of the battery are effectively met.

(3) According to the battery pack, the overcurrent row is used for connecting the adjacent battery core pole columns, and the bent part is arranged in the middle of the overcurrent row, so that the external shape of the monitored battery core can be well adapted, and the effective attaching effect with the monitored battery core can be realized. Meanwhile, the FPC board directly takes electricity from the busbar through the acquisition sheet, a sampling line, a connector and a slave control board are not required to be arranged, the arrangement space is effectively saved, the assembly is more convenient, and the cost is saved.

(4) According to the battery pack, the insulating support is arranged to fix the acquisition module and the overcurrent row, and the connecting positioning holes and the pole column holes are arranged on the overcurrent row, so that the stability of each element is improved while the arrangement is optimized.

(5) According to the battery pack, the resistor is arranged on the FPC board, so that the functions of balancing, collecting, current limiting, filtering and the like can be realized. The acquisition module is provided with the isolation transformer and the communication plug-in unit, so that the reliability design and the communication function with the external main control module can be realized.

Drawings

Fig. 1 is a schematic view of a battery pack according to the present utility model;

fig. 2 is a schematic diagram of an acquisition module in a battery pack according to the present utility model;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

fig. 4 is a perspective view of an overcurrent row in a battery pack according to the present utility model;

fig. 5 is a top view of an overcurrent row in a battery pack according to the present utility model.

Reference numerals in the schematic drawings illustrate:

1. an acquisition module; 11. a chip; 12. an FPC board; 13. a first pole acquisition piece; 14. a second pole acquisition piece; 15. a resistor; 151. a first pole connection piece; 152. a second pole connection piece; 16. an isolation transformer; 17. a communication plug-in; 2. mica sheets; 3. an overcurrent row; 31. connecting the positioning holes; 32. a post hole; 33. a bent-up portion; 4. an insulating support; 5. and a battery cell.

Detailed Description

For a further understanding of the present utility model, the present utility model is described with reference to the drawings.

Examples

Referring to fig. 1-3, a battery pack according to this embodiment includes a plurality of battery cells 5 arranged side by side, two poles of the battery cells 5 are located on the same side of the battery cells 5, and an acquisition module 1 is disposed on the side of the battery cells 5 where the poles are located, for acquiring information of the battery cells 5; the collection module 1 comprises an FPC board 12, and the middle part of the FPC board 12 is provided with an arch structure along the length direction, so that a smooth air channel is formed between the FPC board 12 and the battery cell 5, and the heat dissipation requirement of the monitored battery pack can be realized. Under the condition that an explosion-proof valve is arranged between two pole columns of the battery cell 5 in the prior art, the arch structure is arranged at the upper position of the explosion-proof valve, and the formed air passage space can also enable the explosion-proof valve to better exert the functions of pressure balance and gas directional discharge. The chips 11 are arranged on two sides of the arch structure of the FPC board 12, the chips 11 on two sides are arranged at intervals along the length direction of the FPC board 12, and the chips 11 on two sides of the arch structure are staggered. The multiple chips 11 are scattered and then staggered, so that the monitoring of the independent state information of the multiple battery cores 5 of the monitored battery, such as voltage monitoring, electrochemical impedance spectrum monitoring and the like, can be effectively realized. Further, in order to better realize the temperature monitoring to the independent battery cell 5, in the battery pack of this embodiment, a side face of the chip 11 is fixedly connected with the FPC board 12, the chip 11 integrates a temperature sensor, and the temperature sensor contacts with the battery cell 5 through the FPC board 12 to collect the temperature condition. Further, in order to effectively realize soaking insulation of the battery, the present embodiment is provided with the mica sheet 2 between the FPC board 12 and the battery cell 5. Further set up the shape structure of mica sheet 2 as the middle part and arch along length direction, when taking account of soaking insulation, the air passage that forms can realize the heat dissipation needs, under the circumstances that is equipped with explosion-proof valve between the two poles of electricity core 5 post, arch structure sets up in the upper position of explosion-proof valve, can also make the better effect of exerting pressure balance and the directional release of gas of explosion-proof valve.

Referring to fig. 1, 4 and 5, in the battery pack of the present embodiment, the overcurrent row 3 is disposed at the position of the two poles of the battery cell 5, and is used for connecting the poles of the adjacent battery cells 5. The overcurrent row 3 is of a sheet structure, a bent part 33 is arranged in the middle of the overcurrent row 3, the bent part 33 divides the overcurrent row 3 into two parts, and the two parts are respectively connected with the poles of the adjacent battery cells 5. The pre-folded bent-up portion 33 can be well adapted to the external shape of the monitored cell 5 and achieve an effective attachment effect with the monitored cell 5. Further, in order to better achieve adaptation and fixation with other structures, one end of the overcurrent row 3 in this embodiment may be provided with a connection positioning hole 31, the overcurrent row 3 is fixedly connected with the insulating support 4 through the connection positioning hole 31, and the other end of the overcurrent row 3 may be provided with a post hole 32, where the position of the post hole 32 corresponds to the detected position of the battery post. In this embodiment, an insulating support 4 is further provided to fix the collection module 1 and the overcurrent row 3, specifically, the insulating support 4 may be optionally hot riveted with the arch structure of the FPC board 12 or fixed by adhesive back glue, and the insulating support 4 is fixedly connected with the overcurrent row 3 through a connection positioning hole 31, and meanwhile, a shallow slot may be further provided on the insulating support 4 to accommodate the overcurrent row 3.

Referring to fig. 2-3, the FPC board 12 in the battery pack of the present embodiment is further provided with a first pole collecting piece 13 and a second pole collecting piece 14 connected to each chip 11, and the first pole collecting piece 13 and the second pole collecting piece 14 are communicated with two poles of the electric core 5 through the overcurrent row 3. The FPC board 12 directly gets the electricity for chip 11 from the busbar through gathering the piece, need not to set up sampling line, connector and from the accuse board, when effectively having saved the arrangement space, make the assembly more convenient, practiced thrift the cost. Further, the FPC board 12 may further be provided with a first electrode connection piece 151 and a second electrode connection piece 152, where a resistor 15 is connected between the first electrode connection piece 151 and the second electrode connection piece 152, and the first electrode connection piece 151 and the second electrode connection piece 152 are connected with two poles of the electric core 5, specifically, the first electrode connection piece 151 and the second electrode connection piece 152 may also be connected with two poles of the electric core 5 through the overcurrent row 3. In this embodiment, the resistor 15 is arranged on the FPC board 12, so that functions of equalization, collection, current limiting, filtering and the like can be realized, and the power supply connection piece of the resistor 15 is additionally arranged on the power supply collection piece side of the chip 11, so that the power supply mode is more optimized, and the assembly is more convenient. In this embodiment, the collection module 1 is further provided with an isolation transformer 16 and a communication plug-in unit 17, and the isolation transformer 16 and the communication plug-in unit 17 are directly connected to the FPC board 12, so that the reliability design and the communication function with the external main control module can be realized.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. The battery pack comprises a plurality of electric cores (5) which are arranged side by side, wherein two polar posts of the electric cores (5) are positioned on the same side face of the electric cores (5); the battery cell is characterized by further comprising an acquisition module (1), wherein the acquisition module (1) is arranged on the side face of the electrode post of the battery cell (5); the acquisition module (1) include FPC board (12), FPC board (12) middle part sets up the arch structure along length direction, set up a plurality of chips (11) on FPC board (12), chip (11) set up in arch structure both sides, chip (11) of both sides all set up along FPC board (12) length direction interval, chip (11) of arch structure both sides stagger the setting.

2. A battery pack according to claim 1, wherein: one side of the chip (11) is fixedly connected with the FPC board (12), the chip (11) is integrated with a temperature sensor, and the temperature sensor is contacted with the battery cell (5) through the FPC board (12).

3. A battery pack according to claim 1, wherein: and a mica sheet (2) is arranged between the battery cell (5) and the FPC board (12), and the mica sheet (2) is attached to the arched structure position of the FPC board (12).

4. A battery pack according to claim 3, wherein: and an arch structure is arranged in the middle of the mica sheet (2) along the length direction.

5. A battery pack according to claim 1, wherein: the battery cell is characterized in that an overcurrent row (3) is arranged at the position of the two poles of the battery cell (5), the overcurrent row (3) is of a sheet structure, a bent part (33) is arranged at the middle part of the overcurrent row, the bent part (33) divides the overcurrent row (3) into two parts, and the two parts are respectively connected with the poles of the adjacent battery cells (5).

6. A battery pack according to claim 5, wherein: the FPC board (12) is also provided with a collection sheet connected with each chip (11); the collecting plates comprise a first pole collecting plate (13) and a second pole collecting plate (14), and the first pole collecting plate (13) and the second pole collecting plate (14) are communicated with two poles of the battery cell (5) through the overcurrent row (3).

7. A battery pack according to claim 5, wherein: the battery cell (5) post side still is provided with insulating support (4), collection module (1) and overflow row (3) fixed connection are on insulating support (4).

8. A battery pack as claimed in claim 7, wherein: the battery is characterized in that one end of the overcurrent row (3) is provided with a connecting positioning hole (31), the overcurrent row (3) is fixedly connected with the insulating support (4) through the connecting positioning hole (31), the other end of the overcurrent row (3) is provided with a pole hole (32), and the position of the pole hole (32) corresponds to the position of a detected battery pole.

9. A battery pack according to claim 1, wherein: the FPC board (12) is further provided with a first electrode connecting sheet (151) and a second electrode connecting sheet (152), the first electrode connecting sheet (151) and the second electrode connecting sheet (152) are communicated with two poles of the battery core (5), and a resistor (15) is connected between the first electrode connecting sheet (151) and the second electrode connecting sheet (152).

10. The battery pack according to any one of claims 1 to 9, wherein: the acquisition module (1) further comprises an isolation transformer (16) and a communication plug-in unit (17), and the isolation transformer (16) and the communication plug-in unit (17) are connected to the FPC board (12).