CN219350532U

CN219350532U - Battery module, battery pack and vehicle

Info

Publication number: CN219350532U
Application number: CN202320774834.2U
Authority: CN
Inventors: 李峥; 冯玉川; 高伟; 何泓材
Original assignee: Suzhou Qingtao New Energy S&T Co Ltd
Current assignee: Suzhou Qingtao New Energy S&T Co Ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-14
Anticipated expiration: 2033-04-10

Abstract

The utility model discloses a battery module, a battery pack and a vehicle, and relates to the technical field of batteries. The battery module comprises a bracket, a circuit board and a battery body. A fixing groove is formed in one side of the bracket; the circuit board is provided with an acquisition circuit, and is arranged in the fixed groove and fixedly connected with the bracket; the battery body set up in the support deviates from one side of circuit board, the battery body includes a plurality of electric cores that set up side by side, electric core includes the utmost point ear, every the utmost point ear of electric core all passes the support with the circuit board, the utmost point ear with collection circuit electricity is connected. The battery module can save wiring space, improve integration level and improve energy density.

Description

Battery module, battery pack and vehicle

Technical Field

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

Background

In recent years, with the continuous development of soft package batteries, the soft package batteries are widely applied to the power field and the energy storage field by virtue of the advantages of high self-safety performance, light weight, high energy density, small internal resistance, good cycle performance, long service life, flexible design and the like.

In order to collect the voltage and temperature information of the battery cell, a sampling line group needs to be arranged inside the soft package battery. In order to ensure the safety of the soft-package battery, a bracket is also required to be arranged between the sampling line group and the battery cell so as to isolate the battery cell from the sampling wire harness. The sampling system basically adopts the traditional split type sampling line group, which is unfavorable for saving space and has low integration level, so that the energy density of the soft package battery is not high.

To solve the above problems, a battery module, a battery pack and a vehicle are required to be developed to solve the problems of space waste and low integration of the existing battery module.

Disclosure of Invention

The utility model aims to provide a battery module, a battery pack and a vehicle, which can save wiring space, improve integration level and improve energy density.

To achieve the purpose, the utility model adopts the following technical scheme:

a battery module, comprising:

a fixing groove is formed in one side of the bracket;

the circuit board is provided with a collection circuit, and is arranged in the fixing groove and fixedly connected with the bracket;

the battery body is arranged on one side, deviating from the circuit board, of the support, the battery body comprises a plurality of electric cores which are arranged side by side, each electric core comprises a pole lug, each electric core pole lug penetrates through the support and the circuit board, and each electric core pole lug is electrically connected with the acquisition circuit.

Preferably, the bracket is provided with a buckle, and the buckle can be clamped and fixed on the circuit board in the fixing groove.

Preferably, the battery module further comprises a conductive component, the conductive component is fixedly arranged on the circuit board, and the tab is electrically connected with the acquisition circuit through the circuit board.

Preferably, the tab of the battery cell comprises a positive tab and a negative tab, the conductive assembly comprises a plurality of conductive pieces, the plurality of conductive pieces are electrically connected with the collecting circuit, and the positive tab or the negative tab is arranged on two sides of each conductive piece.

Preferably, part of the conductive member includes two conductive portions disposed at intervals and a connection portion connecting the two conductive portions, and each of two sides of the conductive portion is provided with the positive electrode tab or the negative electrode tab.

Preferably, the battery module further comprises a temperature acquisition probe, the circuit board is provided with a first through hole, the support is provided with a second through hole coaxial with the first through hole, and the temperature acquisition probe is abutted to the battery body after passing through the first through hole and the second through hole so as to measure the temperature of the battery body.

Preferably, the diameter of the first through hole is larger than that of the second through hole, the temperature acquisition probe comprises a main body and a detection part, the main body penetrates through the first through hole and is abutted to the bracket, and the detection part penetrates through the second through hole and measures the temperature of the battery body.

Preferably, the support is towards one side of the battery body, a plurality of guide members are arranged at intervals, the lugs of the battery cells pass through two adjacent guide members respectively, and the distance between the two adjacent guide members is gradually increased along the direction away from the support.

A battery pack comprises a plurality of battery modules, wherein the battery modules are connected in series and/or in parallel.

A vehicle comprises the battery pack and a vehicle body, wherein the battery pack is arranged in the vehicle body.

The utility model has the beneficial effects that:

the utility model provides a battery module, a battery pack and a vehicle. The battery module utilizes the acquisition circuit of the circuit board to acquire the voltage of the battery core, and because the acquisition circuit is integrated on the circuit board, the wiring space is saved, meanwhile, the circuit board is embedded in the fixed slot of the bracket, the thickness of the circuit board and the bracket is also reduced, the integration level is high, the weight is reduced, and the energy density is improved.

Drawings

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

fig. 2 is an exploded view of the battery module provided by the present utility model.

In the figure:

1. a bracket; 2. a circuit board; 3. a battery body;

11. a fixing groove; 12. a buckle; 13. a second through hole; 14. a guide member; 21. a first through hole; 31. a battery cell; 32. a spacer; 41. a conductive member; 42. a conductive post;

311. a positive electrode tab; 312. a negative electrode ear; 411. a conductive portion; 412. and a connecting part.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, either fixed or removable; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

The present embodiment provides a battery module, as shown in fig. 1 and 2, which includes a bracket 1, a circuit board 2 and a battery body 3. A fixing groove 11 is formed on one side of the bracket 1; the circuit board 2 is provided with a collection circuit, and the circuit board 2 is arranged in the fixed groove 11 and fixedly connected with the bracket 1; the battery body 3 sets up in the support 1 one side that deviates from circuit board 2, and the battery body 3 includes a plurality of electric cores 31 that set up side by side, and electric core 31 includes the utmost point ear, and the utmost point ear of every electric core 31 all passes support 1 and circuit board 2, and the utmost point ear is connected with the acquisition line electricity.

The collection circuit on the circuit board 2 is formed by printing, and the structure of the sampling line group can be canceled by arranging the circuit board 2, so that the space requirement is greatly reduced. The collection circuit comprises a plurality of printed circuits, the battery cells 31 comprise positive lugs 311 and negative lugs 312, the positive lugs 311 of the battery cells 31 are connected in parallel through part of the printed circuits, the negative lugs 312 of the battery cells 31 are connected in parallel through part of the printed circuits, and the printed circuits connected with the positive lugs 311 are not intersected with the printed circuits connected with the negative lugs 312, so that short circuits are prevented.

This battery module utilizes the collection circuit of circuit board 2 to carry out the voltage acquisition of electric core 31, because collection circuit integration is on circuit board 2, has saved the wiring space, and circuit board 2 is embedded in the fixed slot 11 of support 1 simultaneously, can also reduce circuit board 2 and the holistic thickness of support 1, and the integrated level is high, and weight reduction has improved the energy density.

Preferably, the bracket 1 is provided with a buckle 12, and the buckle 12 can be clamped and fixed with the circuit board 2 positioned in the fixing groove 11. The circuit board 2 is clamped and fixed by the buckle 12, so that the traditional connecting structure such as a screw and the like can be saved, the cost can be saved, the space can be saved, and the installation is more convenient.

Further, the buckle 12 may be disposed at the edge of the fixing slot 11 to clamp the edge of the circuit board 2, and may also be disposed inside the fixing slot 11, where the corresponding position of the circuit board 2 needs to be provided with a bayonet, and when the circuit board 2 is mounted in the fixing slot 11, the buckle 12 passes through the bayonet to clamp and fix the circuit board 2.

In this embodiment, the bracket 1 is provided with a buckle 12 along the circumferential direction at the edge position of the fixing groove 11, and each side is provided with one to two buckles 12, so as to ensure the stability of the fixing between the circuit board 2 and the bracket 1.

It can be understood that the tab is a main heating source of the battery core 31, and is directly connected with the collecting circuit of the circuit board 2, which easily causes the temperature of the circuit board 2 to rise and burn out, and affects the service life. In order to solve the problem, the battery module further comprises a conductive component, the conductive component is fixedly arranged on the circuit board 2, and the tab is electrically connected with the acquisition circuit through the circuit board 2. The conductive assembly is in direct contact with the lug, which is equivalent to a transition structure arranged between the lug and the circuit board 2, and the contact area between the lug and the conductive assembly is larger, so that the heat productivity can be reduced, and the heat dissipation capacity can be improved.

The conductive assembly includes a plurality of conductive members 41, the plurality of conductive members 41 are electrically connected with the collection circuit, and the positive electrode tab 311 or the negative electrode tab 312 is disposed on two sides of each conductive member 41. The positive electrode lugs 311 or the negative electrode lugs 312 on two sides of each conductive piece 41 are bent towards the conductive piece 41 and are fixedly connected with the top surface of the conductive piece 41, and each conductive piece 41 can electrically connect two positive electrode lugs 311 or negative electrode lugs 312 with corresponding acquisition lines, so that the number of the conductive pieces 41 can be reduced, and the cost is reduced.

As shown in fig. 1 and 2, the partial conductive member 41 includes two conductive portions 411 disposed at intervals and a connection portion 412 connecting the two conductive portions 411, and each conductive portion 411 is provided with a positive tab 311 or a negative tab 312 on both sides thereof. The two conductive parts 411 are connected by the connecting part 412, so that the whole heat dissipation area of the conductive member 41 can be further increased, the temperature of the conductive member 41 is reduced, and the service life is ensured.

In this embodiment, the conductive member 41 is a copper bar, and the copper bar is fixed on the circuit board 2 by welding, so that the copper has good electrical conductivity and thermal conductivity, and can reduce resistance, reduce heat generation and improve heat dissipation effect. Since each cell 31 has the positive electrode tab 311 and the negative electrode tab 312, the number of the positive electrode tabs 311 and the negative electrode tabs 312 of the whole battery body 3 is equal.

In order to facilitate connection, the positive electrode lugs 311 of all the battery cells 31 are located at one end of the bracket 1, the negative electrode lugs 312 of all the battery cells 31 are located at the other end of the bracket 1, and the number of copper bars connected with the positive electrode lugs 311 is equal to the number of copper bars connected with the negative electrode lugs 312, and the copper bars are mirror images or are arranged in a central symmetry manner. Moreover, one of the copper bars connected to the negative electrode tab 312 and one of the copper bars connected to the positive electrode tab 311 are provided with the conductive posts 42, so that the battery module can be connected to an external circuit through the conductive posts 42.

However, the safety of the battery module cannot be ensured by collecting only the voltage of the battery cell 31. In this embodiment, the battery module further includes a temperature collecting probe, the circuit board 2 is provided with a first through hole 21, the bracket 1 is provided with a second through hole 13 coaxial with the first through hole 21, and the temperature collecting probe is abutted to the battery body 3 after passing through the first through hole 21 and the second through hole 13 to measure the temperature of the battery body 3.

The temperature of the battery body 3 is measured by the temperature acquisition probe, the state of the battery cell 31 can be monitored together with the data of voltage acquisition, and the safety of the battery module is greatly improved.

Specifically, the wire harness of the temperature acquisition probe can be an independent wire, and the temperature acquisition probe can be integrated with the circuit board 2, and the acquisition circuit of the circuit board 2 is utilized, so that the integration level is further improved.

As shown in fig. 1 and 2, the diameter of the first through hole 21 is larger than that of the second through hole 13, and the temperature acquisition probe includes a main body passing through the first through hole 21 and abutting against the bracket 1, and a detection portion passing through the second through hole 13 and measuring the temperature of the battery body 3. The first through hole 21 and the second through hole 13 form a step structure, the edge of the second through hole 13 is utilized to limit the temperature acquisition probe, the temperature acquisition probe is prevented from extruding the battery core 31, and the safety of the battery module is improved.

In order to more accurately collect the temperature of the battery cells 31, the battery module comprises a plurality of temperature collection probes, and each temperature collection probe can collect the temperature of one or more battery cells 31, so that the temperature of all battery cells 31 is monitored.

Preferably, the battery body 3 further includes a spacer 32, and the spacer 32 is disposed between two adjacent battery cells 31. The heat conduction capability of the spacer 32 is lower, the temperature between the adjacent electric cores 31 can be isolated, on one hand, the temperature acquisition probe can monitor the temperature of the electric cores 31 more accurately, on the other hand, the influence of the electric cores 31 can be prevented, the propagation speed of thermal runaway between the electric cores 31 is reduced and delayed, so that the safe reaction time is ensured, and the safety of the battery module is improved.

Preferably, the support 1 is provided with a plurality of guide members 14 at intervals toward one side of the battery body 3, and the tabs of the plurality of battery cells 31 pass between two adjacent guide members 14, respectively, and the interval between the two adjacent guide members 14 is gradually increased in a direction away from the support 1. That is, the side wall of the guide member 14 is inclined, and when the battery cell 31 is mounted to the bracket 1, the tab can accurately pass through the bracket 1 under the guidance of the side wall of the guide member 14, so that the convenience of mounting the battery cell 31 is improved, and the assembly is convenient.

In order to prevent the end of the guide 14 from abutting against the cell 31 to cause damage to the cell 31, the end of the guide 14 is rounded.

Further, the battery module further comprises a housing fixedly connected with the bracket 1, and the battery body 3 is located in the housing. The shell can wrap up battery body 3 to form a whole, can play the guard action to battery body 3 simultaneously, improves battery module's security.

The embodiment also provides a battery pack, which comprises a plurality of the battery modules, wherein the battery modules are connected in series and/or in parallel.

The embodiment also provides a vehicle, which comprises the battery pack and a vehicle body, wherein the battery pack is arranged in the vehicle body.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims

1. A battery module, comprising:

a bracket (1), wherein a fixing groove (11) is formed in one side of the bracket (1);

the circuit board (2) is provided with a collection circuit, and the circuit board (2) is arranged in the fixed groove (11) and fixedly connected with the bracket (1);

the battery body (3) set up in support (1) deviate from one side of circuit board (2), battery body (3) include a plurality of electric core (31) that set up side by side, electric core (31) are including the utmost point ear, every the utmost point ear of electric core (31) all passes support (1) with circuit board (2), the utmost point ear with gather circuit electricity and be connected.

2. The battery module according to claim 1, characterized in that the bracket (1) is provided with a buckle (12), and the buckle (12) can be clamped and fixed to the circuit board (2) located in the fixing groove (11).

3. The battery module according to claim 1, further comprising a conductive member fixedly provided to the circuit board (2), the tab being electrically connected to the collecting line through the circuit board (2).

4. A battery module according to claim 3, wherein the tab of the cell (31) comprises a positive tab (311) and a negative tab (312), the conductive assembly comprises a plurality of conductive members (41), the plurality of conductive members (41) are electrically connected with the collecting circuit, and both sides of each conductive member (41) are provided with the positive tab (311) or the negative tab (312).

5. The battery module according to claim 4, wherein part of the conductive member (41) includes two conductive portions (411) disposed at an interval and a connection portion (412) connecting the two conductive portions (411), both sides of each conductive portion (411) being provided with the positive electrode tab (311) or the negative electrode tab (312).

6. The battery module according to claim 1, further comprising a temperature acquisition probe, wherein the circuit board (2) is provided with a first through hole (21), the bracket (1) is provided with a second through hole (13) coaxial with the first through hole (21), and the temperature acquisition probe is abutted against the battery body (3) after passing through the first through hole (21) and the second through hole (13) so as to measure the temperature of the battery body (3).

7. The battery module according to claim 6, wherein the diameter of the first through hole (21) is larger than the diameter of the second through hole (13), the temperature acquisition probe includes a main body that passes through the first through hole (21) and abuts against the bracket (1), and a detection portion that passes through the second through hole (13) and measures the temperature of the battery body (3).

8. The battery module according to claim 1, wherein a plurality of guide members (14) are provided at intervals on one side of the bracket (1) toward the battery body (3), the tabs of the plurality of battery cells (31) pass between two adjacent guide members (14), respectively, and the distance between the two adjacent guide members (14) increases gradually in a direction away from the bracket (1).

9. A battery pack, characterized by comprising a plurality of battery modules according to any one of claims 1 to 8, which are connected in series and/or in parallel.

10. A vehicle comprising the battery pack of claim 9, further comprising a vehicle body, the battery pack being disposed within the vehicle body.