CN220138651U

CN220138651U - Battery module and battery pack

Info

Publication number: CN220138651U
Application number: CN202321690379.4U
Authority: CN
Inventors: 夏乐峰; 葛有为
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-12-05
Anticipated expiration: 2033-06-29

Abstract

The utility model provides a battery module and a battery pack, wherein the battery module comprises a plurality of electric cores and a sampling assembly; the sampling assembly comprises a sampling main body, a plurality of voltage acquisition parts arranged on the sampling main body, and sampling plug-ins arranged in the middle of the sampling main body, wherein the voltage acquisition parts are electrically connected with the electric cores in one-to-one correspondence, the voltage acquisition parts are used for acquiring the voltage information of the electric cores, and each voltage acquisition part is electrically connected with the sampling plug-ins. According to the battery module, the sampling plug-in is arranged in the middle of the sampling main body, so that voltage information collected by each voltage sampling part is collected from two ends of the sampling main body to the middle and transmitted to the sampling plug-in, the wiring width of an information transmission line between each voltage sampling part and the sampling plug-in can be reduced, the sampling assembly is arranged on the pole column side of the battery cell conveniently, the length of the sampling assembly is shortened, and the production cost is reduced.

Description

Battery module and battery pack

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery module. Meanwhile, the utility model also relates to a battery pack provided with the battery module.

Background

Due to the limitation of the arrangement space, the sampling assembly of the battery module may be formed in various shapes. The sampling assembly is classified into three types of U-shaped, straight strip-shaped and L-shaped according to the shape. The U-shaped sampling assembly is used more on a standard module (a battery module made of square shell battery cells) and is arranged above the battery module. The straight strip-shaped module sampling assembly is widely applied, can be used for standard modules and short-cutter battery modules, and is also arranged above the battery modules. The L-shaped module sampling assembly is arranged on the side of the battery cell pole, and the sampling plug-in unit is positioned above the aluminum bar.

When the sampling plug-in unit is limited by the arrangement space of the battery pack, the sampling plug-in unit can only be arranged at the side of the battery core pole, and the straight strip-shaped and U-shaped module sampling assembly is not applicable, so that the L-shaped module sampling assembly can be adopted. However, the L-shaped structure is folded, so that the sampling assembly of the battery module is overlong, and the base material needs to be perforated on two sides, thereby increasing the production and manufacturing cost.

In addition, the sampling assembly on the traditional battery module is required to collect the collected signals to the sampling plug-in unit through an internal circuit, and the minimum width of the sampling assembly close to the sampling plug-in unit limits the quantity of the collected signals because the structural design of the sampling assembly is unreasonable. At present, the number of signals collected by a single module sampling assembly is increased, and when the width of the sampling assembly does not meet the requirement, the double-sided plate structure module sampling assembly can only be adopted, but the production cost can be increased by the mode.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery module for collecting information of the battery cells, and reducing production cost.

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

a battery module comprises a plurality of electric cores and a sampling assembly;

the sampling assembly comprises a sampling main body, a plurality of voltage acquisition parts arranged on the sampling main body, and sampling plug-ins arranged in the middle of the sampling main body, wherein the voltage acquisition parts are electrically connected with the battery cells in one-to-one correspondence, the voltage acquisition parts are used for acquiring voltage information of the battery cells, and each voltage acquisition part is electrically connected with the sampling plug-ins.

Further, an extension portion extending along the width direction of the sampling main body is arranged in the middle of the sampling main body, and the sampling plug-in is arranged on the extension portion.

Further, a reinforcing plate positioned below the extension part is arranged at the bottom of the sampling main body.

Further, the bus bar support is further included, and the reinforcing plate is detachably connected with the bus bar support.

Further, a clamping piece is arranged between the reinforcing plate and the busbar bracket, and the reinforcing plate is detachably connected with the busbar bracket through the clamping piece.

Further, the clamping piece is arranged on the other side of the busbar bracket relative to the reinforcing plate, and a plurality of clamping heads are arranged on the clamping piece;

the busbar support is provided with through holes for the clamping heads to pass through, and the reinforcing plate is provided with clamping holes which are clamped with the clamping heads in a one-to-one correspondence manner.

Further, the clamping piece is provided with a through hole which is arranged corresponding to the aluminum bar on the busbar; and/or the number of the groups of groups,

the clamping piece is provided with a positioning part for positioning the clamping piece on the busbar bracket.

Further, the sampling main body comprises a base material extending along the length direction of the battery module;

the voltage acquisition part comprises a nickel sheet arranged on the base material, and the nickel sheet is electrically connected with the battery cell.

Further, the sampling main body is provided with at least one temperature acquisition part for acquiring temperature information of the battery cell;

and a reinforcing plate positioned below the temperature acquisition part is arranged on the sampling main body.

Compared with the prior art, the utility model has the following advantages:

according to the battery module, the sampling plug-in is arranged in the middle of the sampling main body, so that voltage information collected by each voltage sampling part is collected from two ends of the sampling main body to the middle and transmitted to the sampling plug-in, the wiring width of an information transmission line between each voltage sampling part and the sampling plug-in can be reduced, meanwhile, compared with a traditional linear and U-shaped sampling assembly, the sampling assembly in the embodiment can be arranged on the pole column side of an electric core, compared with an L-shaped sampling assembly, a turnover structure is not required, the length of the sampling assembly is shortened, and the production cost is reduced.

Furthermore, the arrangement of the sampling insert is facilitated by the extension. The reinforcing plate positioned below the extension part is arranged at the bottom of the sampling main body, so that the structural strength of the sampling plug-in part is improved. The stiffening plate is detachably connected with the busbar bracket, so that the stiffening plate and the busbar bracket are convenient to mount and dismount. The reinforcing plate is connected with the busbar bracket through the clamping piece, and has the advantages of simple installation mode and convenient disassembly. The clamping piece passes through the through hole and then is connected with the reinforcing plate on the busbar bracket through the clamping of the clamping hole, and the clamping piece is simple in structure and easy to operate.

In addition, through the through holes arranged corresponding to the aluminum bars are arranged on the clamping pieces, so that the electric connection between the aluminum bars and the upper electrode posts of the battery cells is facilitated; and the positioning part on the clamping piece is beneficial to improving the installation efficiency of the clamping piece. The nickel sheet is electrically connected with the battery cell to collect voltage information, so that the voltage information collection effect is improved. The temperature information of electric core can be detected to temperature acquisition portion, and the structural strength of temperature acquisition portion department is favorable to improving in the setting of reinforcing plate, and promotes temperature acquisition portion's reliability in use.

Another object of the present utility model is to provide a battery pack, on which the battery module as described above is provided.

The battery pack has the same beneficial effects as the battery module, and is not described herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of a sample assembly and a bus bar bracket according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a sample assembly and a bus bar bracket according to an embodiment of the present utility model from another perspective;

FIG. 3 is a schematic diagram of a sampling assembly according to an embodiment of the present utility model;

FIG. 4 is a partial exploded view of a sampling assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a bus bar bracket according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a portion of a bus bar bracket according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a portion of a bus bar bracket and a clip according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a clamping member according to an embodiment of the utility model.

Reference numerals illustrate:

1. a sampling body; 2. a sampling plug-in; 3. a busbar support; 4. a clamping piece; 5. a reinforcing plate;

101. a substrate; 102. nickel flakes; 103. a temperature acquisition unit; 104. a third positioning hole; 105. a first positioning hole; 106. a reinforcing plate; 107. an extension portion;

201. a positioning block;

301. a third positioning column; 302. aluminium bar;

401. a chuck; 402. a first positioning column; 403. a second positioning column; 404. a through hole;

501. and (5) clamping the hole.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", and the like are presented, they are based on the azimuth or the positional relationship shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The embodiment relates to a battery module, which integrally comprises a plurality of electric cores and a sampling assembly. The sampling assembly comprises a sampling main body 1, a plurality of voltage acquisition parts arranged on the sampling main body 1, and a sampling plug-in 2 arranged in the middle of the sampling main body 1. The voltage acquisition parts are electrically connected with the electric cores in a one-to-one correspondence mode, the voltage acquisition parts are used for acquiring voltage information of the electric cores, and each voltage acquisition part is electrically connected with the sampling plug-in unit 2.

The battery module according to this embodiment is configured such that the sampling plug-in unit 2 is disposed in the middle of the sampling body 1, so that the voltage information collected by each voltage sampling unit is collected from two ends of the sampling body 1 to the middle and transmitted to the sampling plug-in unit 2, thereby being beneficial to reducing the wiring width of the information transmission line between each voltage sampling unit and the sampling plug-in unit 2. Meanwhile, compared with the conventional linear and U-shaped sampling assembly, the sampling assembly in the embodiment can be arranged on the pole side of the battery cell. And compared with the L-shaped sampling assembly, the sampling assembly in the embodiment does not need to be provided with a turnover structure, so that the length of the sampling assembly is shortened, and the production cost is reduced.

Based on the above general description, the structure of the sampling assembly and the bus bar bracket 3 in the connected state is shown in fig. 1 and 2, and the structure of the sampling assembly is shown in fig. 3 and 4. To facilitate the arrangement of the sampling insert 2 in the sampling body 1. In this embodiment, the middle part of the sampling body 1 is provided with an extension part 107 extending in the width direction of the sampling body, and the sampling insert 2 is provided on the extension part 107. The extension 107 here is adapted to the width of the busbar holder 3, and the sampling insert 2 is connected to the extension 107 by means of hot pressing.

In a specific structure, as shown in fig. 4, two positioning blocks 201 are respectively arranged at two ends of the bottom of the sampling insert 2 at intervals, and a first positioning hole 105 for inserting each positioning block 201 is provided on the extension portion 107. The sampling insert 2 is positioned on the extension 107 by insertion of the positioning block 201 in the corresponding first positioning hole 105. By matching the positioning block 201 with the first positioning hole 105, the mounting efficiency of the sampling insert 2 can be improved.

As shown in fig. 3 and 4, the bottom of the sampling body 1 is provided with a stiffening plate 5 below the extension 107. The provision of the stiffening plate 5 here advantageously increases the structural strength of the extension 107 and thus the reliability of use of the sampling insert 2. In practice, the stiffening plate 5 is welded to the extension 107. In order to facilitate the installation of the sampling assembly, the battery module in the embodiment further comprises a busbar bracket 3, and the reinforcing plate 5 is detachably connected with the busbar bracket 3. The stiffening plate 5 is located between the extension 107 and an adjacently arranged aluminium bar 302 on the busbar support 3. The extension 107 is arranged higher than the sampling body 1 due to the arrangement of the stiffening plate 5. The sampling assembly is detachably arranged on the busbar bracket 3 through a reinforcing plate 5.

As a preferred embodiment, a clamping piece 4 is arranged between the reinforcing plate 5 and the busbar bracket 3, and the reinforcing plate 5 is detachably connected with the busbar bracket 3 through the clamping piece 4. Here realize the detachable connection between stiffening plate 5 and the busbar through joint 4, be convenient for installation and dismantlement between the two.

In detail, as shown in fig. 4, the reinforcing plate 5 has connection portions located outside both ends of the extension portion 107, and the clip 4 is specifically provided between the connection portions and the busbar bracket 3, where the connection portions are provided to facilitate the installation of the clip 4. In this embodiment, the clamping member 4 is disposed opposite to the reinforcing plate 5 on the other side of the busbar bracket 3, and a plurality of clips 401 are disposed on the clamping member 4. The busbar bracket 3 is provided with through holes for the chucks 401 to pass through, and the reinforcing plate 5 is provided with clamping holes 501 which are clamped with the chucks 401 in a one-to-one correspondence manner.

As shown in fig. 6 to 8, two ends of the clamping member 4 in the present embodiment are respectively provided with two clamping heads 401, and the clamping holes 501 are disposed on the connecting portion in one-to-one correspondence with the clamping heads 401. The clamping piece 4 is at the bottom of the busbar bracket 3, so that the clamping head 401 firstly passes through the corresponding through hole and the clamping hole 501 to be hooked at the top of the connecting part, and in the clamping state, the extending part 107, the reinforcing plate 5 and the busbar are restrained between the clamping head 401 and the clamping piece 4.

As shown in fig. 8, the clip 4 is provided with a through hole 404 provided corresponding to the aluminum bar 302 on the busbar, and the through hole 404 has a "sun" shape. This arrangement is advantageous for ensuring electrical connection between the aluminum bar 302 and the corresponding upper terminal of the cell. Of course, the through-holes 404 may be provided in a "mouth" shape depending on the position where the extension portions 107 are provided.

In addition, in the present embodiment, in order to improve the installation effect of the clip 4, the clip 4 is provided with a positioning portion for positioning itself on the busbar bracket 3. As shown in fig. 7, a plurality of first positioning posts 402 are provided on the clip 4, and a second positioning hole is provided on each aluminum bar 302 for each first positioning post 402 to pass through. The clip 4 can be positioned on the bus bar bracket 3 by inserting the first positioning post 402 into the second positioning hole.

Further, as shown in fig. 7 and 8, a second positioning post 403 is disposed between two through holes 404 on the clamping member 4, and the two second positioning posts 403 can be inserted into the space between two adjacent aluminum bars 302, so as to improve the positioning effect of the clamping member 4 on the busbar. In addition, in the clamped state, the bottom of the reinforcing plate 5 can be abutted against the top end of the first positioning column 402, and at this time, the first positioning column 402 has an effect of supporting the reinforcing plate 5 in addition to a specific positioning function.

The sampling main body 1 in this embodiment includes a base material 101 extending along a length direction of the battery module, the voltage collecting portion includes a nickel sheet 102 disposed on the base material 101, and the nickel sheet 102 is electrically connected with the battery cell to collect voltage information of the battery cell. Each nickel plate 102 is electrically connected with a connection terminal on the sampling insert 2 through an information transmission line provided in the base material 101, and the sampling insert 2 is electrically connected with the BMS through a wire harness, thereby transmitting voltage information of the battery cell to the BMS.

As shown in fig. 4 and 5, the nickel sheet 102 is provided to extend from one side of the base material 101 in the width direction of the base material 101. Each nickel plate 102 is specifically electrically connected to the aluminum bar 302 and is electrically connected to the terminal of the cell through the aluminum bar 302. The substrate 101 is provided with a plurality of third positioning holes 104 which are arranged at intervals along the length direction thereof, and the busbar bracket 3 is provided with third positioning posts 301 which are respectively inserted into the corresponding third positioning holes 104, thereby being beneficial to positioning the substrate 101 on the busbar bracket 3.

In order to further improve the use effect of the sampling assembly, at least one temperature acquisition part 103 is arranged on the sampling main body 1, the temperature acquisition part 103 is used for acquiring the temperature information of the current core, and a reinforcing plate 106 positioned below the temperature acquisition part 103 is arranged on the sampling main body 1. As shown in fig. 4, the reinforcing plate 106 is welded specifically to the bottom of the base material 101, so that the structural strength at the temperature acquisition portion 103 can be improved with good acquisition accuracy.

In specific implementation, the temperature acquisition part 103 can be arranged on the nickel plates 102 at different positions of the sampling main body 1 according to the use requirement. And the temperature acquisition part 103 can also be electrically connected with the connection terminal on the sampling plug-in unit 2 through the information transmission line arranged in the base material 101, and the sampling plug-in unit 2 is electrically connected with the BMS through the wire harness, so that the temperature information of the battery cell is transmitted to the BMS. The temperature acquisition part 103 of the embodiment can adopt a temperature sensor in the prior art, and the product is mature, convenient to arrange and high in acquisition precision. The temperature sensor is wrapped with the heat-conducting glue, and temperature information of the battery cell can be collected by the temperature sensor through the heat-conducting glue.

The battery module of this embodiment sets up sampling plug-in components 2 in the middle part of sampling main part 1 through sampling assembly, does benefit to when gathering the information of electric core, still does benefit to the space occupation volume that reduces sampling assembly. And do benefit to further improvement sampling assembly's structural strength through reinforcing plate 106 and stiffening plate 5, still install sampling assembly on busbar support 3 through joint 4, be convenient for arrange and implement, and the installation effect is good. The nickel plate 102 and the temperature acquisition part 103 are arranged, so that the acquisition of the voltage information and the temperature information of the battery cell is facilitated, and the use safety of the battery module can be improved.

In addition, the embodiment also relates to a battery pack, and the battery pack is provided with the battery module. The battery pack has the same beneficial effects as the battery module, and is not described herein.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery module, characterized in that:

the device comprises a plurality of electric cores and a sampling assembly;

2. The battery module according to claim 1, wherein:

the middle part of sampling main part is equipped with the extension portion that extends along self width direction and sets up, sampling plug-in components are located on the extension portion.

3. The battery module according to claim 2, wherein:

the bottom of the sampling main body is provided with a reinforcing plate positioned below the extension part.

4. The battery module according to claim 3, wherein:

still include the busbar support, the stiffening plate with the busbar support can dismantle and link to each other.

5. The battery module according to claim 4, wherein:

the reinforcing plate with be equipped with the joint spare between the busbar support, the reinforcing plate passes through the joint spare with the busbar support can dismantle and link to each other.

6. The battery module according to claim 5, wherein:

the clamping piece is arranged on the other side of the busbar bracket relative to the reinforcing plate, and a plurality of clamping heads are arranged on the clamping piece;

7. The battery module according to claim 6, wherein:

the clamping piece is provided with a through hole which is arranged corresponding to the aluminum bar on the busbar; and/or the number of the groups of groups,

8. The battery module according to claim 1, wherein:

the sampling main body comprises a base material which is arranged along the length direction of the battery module in an extending way;

9. The battery module according to any one of claims 1 to 8, wherein:

the sampling main body is provided with at least one temperature acquisition part, and the temperature acquisition part is used for acquiring the temperature information of the battery cell;

10. A battery pack, characterized in that:

the battery pack is provided with the battery module according to any one of claims 1 to 9.