CN219811586U

CN219811586U - Battery module and battery pack

Info

Publication number: CN219811586U
Application number: CN202321328086.1U
Authority: CN
Inventors: 赵雪连; 王留杰; 王娟
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-10-10
Anticipated expiration: 2033-05-29

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack, wherein the battery module comprises a battery pack and a battery bracket, and the battery pack comprises a plurality of batteries; the battery bracket comprises at least two sub-brackets, at least two sub-brackets are arranged along a first direction, an accommodating part is arranged on the sub-brackets, the battery is arranged on the accommodating part, the first sub-bracket comprises a first bracket body and a first overlapping part, the first overlapping part is arranged at one end of the first bracket body, which is close to a second sub-bracket, the second sub-bracket comprises a second bracket body and a second overlapping part, the second overlapping part is arranged at one end of the second bracket body, which is close to the first sub-bracket, the first overlapping part and the second overlapping part are overlapped in a second direction, and the first sub-bracket and the second sub-bracket are two adjacent sub-brackets in the at least two sub-brackets. The production efficiency of the battery pack can be improved.

Description

Battery module and battery pack

Technical Field

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

Background

Battery devices are often provided in electric vehicles for powering the electric vehicles. The battery device includes a plurality of batteries and a battery bracket for mounting the plurality of batteries. With the demands of the electric vehicle for the range, the number of batteries in the battery device increases, which results in an increase in the area of the battery bracket for mounting the batteries. The battery bracket with the overlarge area has the problem of inconvenient production, manufacture and transportation, and influences the production efficiency of the battery device.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to provide a battery module and a battery pack, and further to at least improve the production efficiency of the battery pack to a certain extent.

According to an aspect of the present disclosure, there is provided a battery module including:

a battery pack including a plurality of batteries;

the battery bracket comprises at least two sub-brackets, at least two sub-brackets are arranged along a first direction, an accommodating part is arranged on each sub-bracket, the battery is arranged on the accommodating part, a first overlapping part is arranged at one end of a first sub-bracket, which faces towards a second sub-bracket, a second overlapping part is arranged at one end of the second sub-bracket, which faces towards the first sub-bracket, the first overlapping part and the second overlapping part are overlapped in a second direction, the first sub-bracket and the second sub-bracket are two adjacent sub-brackets in the at least two sub-brackets, and the second direction is perpendicular to one surface of the accommodating part, where the accommodating part is arranged, of the sub-bracket.

The battery module provided by the embodiment of the disclosure comprises a battery pack and a battery bracket, wherein the battery bracket comprises a plurality of sub-brackets, the sub-brackets are arranged along a first direction, the sub-brackets are provided with accommodating parts for installing batteries, the batteries are installed through the sub-battery brackets, the area of the sub-brackets can be reduced, the battery bracket is convenient to manufacture and transport, the production efficiency of the battery module can be improved, further, in two adjacent sub-brackets, the first sub-bracket is provided with a first overlapping part, the second sub-bracket is provided with a second overlapping part, the first overlapping part and the second overlapping part are overlapped, the connection stability between the adjacent sub-brackets is improved, and the fracture of the adjacent sub-bracket connecting parts in the transport or use process is avoided.

According to another aspect of the present disclosure, there is provided a battery pack including the above battery module.

The battery pack provided by the embodiment of the disclosure comprises a battery module, wherein a plurality of sub-brackets are arranged along a first direction in the battery module, the sub-brackets are provided with containing parts for installing batteries, the batteries are installed through the sub-brackets, the area of the sub-brackets can be reduced, the manufacturing and the transferring of the battery brackets are convenient, the production efficiency of the battery pack can be improved, further, in two adjacent sub-brackets, the first sub-bracket is provided with a first overlapping part, the second sub-bracket is provided with a second overlapping part, the first overlapping part and the second overlapping part are overlapped, the connection stability between the adjacent sub-brackets is improved, the breakage of the adjacent sub-bracket connecting parts in the transferring or using process is avoided, and the yield of the battery pack is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic view illustrating a structure of a battery module according to an exemplary embodiment of the present disclosure;

fig. 2 is a partial enlarged view of a battery module according to an exemplary embodiment of the present disclosure;

fig. 3 is a schematic structural view of a battery according to an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural view of a battery bracket according to an exemplary embodiment of the present disclosure;

fig. 5 is a schematic structural view of a battery pack according to an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, 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 unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The exemplary embodiment of the present disclosure first provides a battery module 100, as shown in fig. 1 and 2, the battery module 100 including a battery pack 10 and a battery bracket 20, the battery pack 10 including a plurality of batteries 11; the battery bracket 20 includes at least two sub-brackets, the at least two sub-brackets are arranged along a first direction, the sub-brackets are provided with accommodating portions, the battery 11 is arranged in the accommodating portions, the first sub-bracket 21 includes a first bracket body 211 and a first overlapping portion 212, the first overlapping portion 212 is arranged at one end of the first bracket body 211 near the second sub-bracket 22, the second sub-bracket 22 includes a second bracket body 221 and a second overlapping portion 222, the second overlapping portion 222 is arranged at one end of the second bracket body 221 near the first sub-bracket 21, the first overlapping portion 212 and the second overlapping portion 222 overlap in a second direction, the first sub-bracket 21 and the second sub-bracket 22 are two adjacent sub-brackets of the at least two sub-brackets, and the second direction is perpendicular to one surface of the sub-bracket where the accommodating portions are arranged.

The battery module 100 provided in this disclosure includes a battery pack 10 and a battery bracket 20, the battery bracket 20 includes a plurality of sub-brackets, the plurality of sub-brackets are arranged along a first direction, a containing portion for installing a battery 11 is provided on the sub-bracket, the battery 11 is installed through the plurality of sub-battery brackets 20, the area of the sub-brackets can be reduced, the manufacturing and the transportation of the battery bracket 20 are convenient, and then the production efficiency of the battery module 100 can be improved, further, in two adjacent sub-brackets, a first overlapping portion 212 is provided on a first sub-bracket 21, a second overlapping portion 222 is provided on a second sub-bracket 22, the first overlapping portion 212 and the second overlapping portion 222 overlap, the connection stability between the adjacent sub-brackets is improved, and the fracture of the adjacent sub-bracket connection portions in the transportation or use process is avoided.

Each portion of the battery module 100 provided in the embodiment of the present disclosure will be described in detail as follows:

the battery module 100 may exist as one assembly unit in the embodiment of the present disclosure, that is, the battery pack 10 and the battery bracket 20 may be connected and then assembled into the battery pack at the time of battery pack. The battery module may further include a frame surrounding the battery pack 10 and connected to the battery bracket 20.

The battery pack 10 includes a plurality of batteries 11, and the plurality of batteries 11 may be distributed in at least two rows, and one row of batteries 11 includes a plurality of batteries 11 arranged in a first direction. The plurality of rows of cells 11 may be arranged in a third direction, the third direction and the first direction. The cells 11 may be aligned in two adjacent rows of cells 11 or the cells 11 may be staggered in two adjacent rows of cells 11.

Alternatively, the battery module 100 may include a plurality of battery packs 10, one battery pack 10 corresponding to each sub-bracket. For example, the cells in the battery pack are in an n×n array, and a plurality of battery packs 10 are arranged in the first direction. As such, the length of the battery carrier 20 is greater than the width of the battery carrier 20.

As shown in fig. 3, the battery 11 may include a case 112, a battery cell, and a post 111, and a receiving space for receiving the battery cell, the electrolyte, and the like is formed inside the case 112. The pole 111 is provided to the housing 112, and the pole 111 is connected to the battery cell. The battery cell is disposed in the accommodating space in the housing 112, and the battery cell is electrically connected with the housing 112. That is, the case 112 in the battery 11 is one electrode of the battery 11, and the post 111 is the other electrode of the battery 11. For example, the case 112 is a negative electrode of the battery 11, and the post 111 is a negative electrode of the battery 11.

The housing 112 may include a housing member 101, a first baffle 102 and a second baffle 103, where the housing member 101 is a cylindrical structure with two open ends, and the first baffle 102 and the second baffle 103 are respectively disposed at two ends of the housing member 101 to block the opening of the housing member 101, so as to form a closed housing 112.

The post 111 may be provided to the first barrier 102 or the second barrier 103. By way of example, the post 111 is provided on the first barrier 102, and then an explosion-proof valve may be provided on the second barrier 103. When the battery 11 is mounted in the battery 11 device, the end of the battery 11 provided with the first baffle 102 faces upward, and the end of the battery 11 provided with the second baffle 103 faces downward.

One of the first baffle 102 and the second baffle 103 may be integrally formed with the housing member 101, and the other of the first baffle 102 and the second baffle 103 may be connected to the housing member 101 by welding or riveting. For example, the first baffle 102 and the housing member 101 are integrally formed by punching, and the second baffle 103 is connected to the housing member 101 by welding.

The housing 112 is made of an electrically conductive material, and the housing 112 may be a steel shell. Further, the first barrier 102 in the housing 112 and in the busbar connection is a steel plate. The material of the housing part 101 and the second baffle 103 may be stainless steel, aluminum, nickel, cadmium, manganese, tungsten or copper, etc. When the first baffle 102 and the housing member 101 are integrally formed, the first baffle 102 and the housing member 101 are made of the same material, for example, stainless steel. The material of the second baffle 103 may be the same as or different from the housing member 101, and the embodiment of the present disclosure is not limited thereto.

The electric core includes electric core body, first utmost point ear and second utmost point ear, and first utmost point ear and second utmost point ear extend from electric core body respectively and go out, and first utmost point ear and utmost point post 111 are connected, and second utmost point ear and shell 112 are connected. The first tab and the pole 111 may be welded, or the first tab and the pole 111 may be connected through an adapter. The second tab and the housing 112 are welded or the second tab and the housing 112 may be connected by an adapter.

The first tab and the second tab may extend from the same end of the battery cell body, for example, the first tab and the second tab extend from the battery cell body toward one end of the pole 111. The pole 111 is provided on the first baffle 102, the first tab is connected to the pole 111, and the second tab is connected to the first baffle 102.

Or, the first tab and the second tab extend from two ends of the battery core body, the first tab extends from one end of the battery core body close to the pole 111, the second tab extends from the first end of the battery core body far away from the pole 111, the pole 111 is arranged on the first baffle 102, and the second tab is connected with the second baffle 103.

In a possible embodiment, the battery 11 may be a cylindrical battery, and the housing 112 has a cylindrical structure. The first baffle 102 and the second baffle 103 are of circular plate-shaped structures, and the first baffle 102 and the second baffle 103 are respectively plugged at two ends of the shell member 101.

In another possible embodiment, the battery 11 may also be a hexagonal-prism battery. The housing 112 has a hexagonal prism structure. The housing member 101 has a thin-walled hexagonal prism structure with two open ends. The first baffle 102 and the second baffle 103 are of hexagonal plate-shaped structures, and the first baffle 102 and the second baffle 103 are respectively plugged at two ends of the shell member 101.

Although the above embodiment has been described using the battery 11 as a cylindrical battery or a hexagonal battery as an example, the embodiment of the present disclosure is not limited thereto, and the battery 11 in the embodiment of the present disclosure may be other batteries 11, for example, a rectangular battery 11 or a triangular battery 11.

The battery bracket 20 includes at least two sub-brackets arranged in the first direction, and the sub-brackets are provided with receiving portions, in which the battery 11 is disposed, and the receiving portions may be receiving recesses or receiving holes. The first sub-bracket 21 is provided with a first overlapping portion 212 toward one end of the second sub-bracket 22, the second sub-bracket 22 is provided with a second overlapping portion 222 toward one end of the first sub-bracket 21, the first overlapping portion 212 and the second overlapping portion 222 overlap in the second direction, and the first sub-bracket 21 and the second sub-bracket 22 are adjacent two sub-brackets of the at least two sub-brackets.

Further, as shown in fig. 4, the battery bracket 20 provided in the embodiment of the present disclosure may further include a fixing member 23, the first overlapping portion 212 is provided with a first connection portion, the second overlapping portion 222 is provided with a second connection portion, and the fixing member 23 connects the first connection portion and the second connection portion to connect the first overlapping portion 212 and the second overlapping portion 222.

Wherein, the first connection portion may be a through hole on the first overlapping portion 212, the second connection portion may be a through hole on the second overlapping portion 222, the fixing member 23 may be a heat stake, the heat stake is disposed through the first connection portion and the second connection portion, and the connection between the first sub-bracket 21 and the second sub-bracket 22 is achieved by heating the heat stake. Of course, in practical applications, the fixing member 23 may also be a bolt, a rivet, a pin, or the like, which is not limited in the embodiment of the disclosure.

In some embodiments, the first sub-bracket 21 and the second sub-bracket 22 may also be connected by means of glue connection or snap connection. For example, a connection glue layer is coated between the first and second overlapped portions 212 and 222 to form a connection glue layer, and the first and second sub-brackets 21 and 22 are connected using the connection glue layer. Or a first clamping structure may be disposed at the first overlapping portion 212, and a second clamping structure may be disposed at the second overlapping portion 222, where the first clamping structure and the second clamping structure cooperate to achieve connection between the first sub-bracket 21 and the second sub-bracket 22.

The length of the battery bracket 20 is L1, the width of the battery bracket 20 is L2, the length of the battery bracket 20 is the dimension of the battery bracket 20 along the first direction, the width of the battery bracket 20 is the dimension of the battery bracket 20 along the third direction, and the third direction is perpendicular to the first direction; wherein the ratio of L2 to L1 is in the range of 2-20. For example, the ratio of L2 to L1 may be 2, 5, 10, 20, or the like. Because the aspect ratio of the battery bracket 20 is larger, the production and manufacturing costs of the battery bracket 20 are higher, and the technical scheme provided by the disclosure can solve the problem and improve the connection stability of the battery bracket 20.

The sub-bracket comprises a bracket body and an overlapping part, wherein the overlapping part is arranged at the end part of the bracket body along the first direction, and the bracket body and the overlapping part form a step structure. The thickness of the overlapping portion is smaller than the thickness of the bracket body, the thickness of the overlapping portion is the dimension of the overlapping portion in the second direction, and the thickness of the bracket body is the thickness of the bracket body in the second direction.

The sub-bracket is provided with a receiving portion for receiving the battery 11, the receiving portion has a bottom wall supporting the battery 11, and the receiving portion does not penetrate through the sub-bracket. The shape of the receiving portion matches the shape of the battery 11. For example, when the battery 11 is a cylindrical battery 11, the receiving portion may be a circular recess; when the battery 11 is a hexagonal-prism battery 11, the receiving portion may be a hexagonal recess.

The first sub-bracket 21 includes a first bracket body 211 and a first overlapping portion 212, the first overlapping portion 212 is connected to the first bracket body 211, the thickness of the first overlapping portion 212 is smaller than that of the first bracket body 211, and the top surface of the first overlapping portion 212 is flush with the top surface of the first bracket body 211. The top surface of the first bracket body 211 is a surface of the first bracket body 211 close to the battery 11, and the top surface of the first overlapping portion 212 is a surface of the first overlapping portion 212 close to the battery 11.

The second sub-bracket 22 includes a second bracket body 221 and a second overlapping portion 222, the second overlapping portion 222 is connected to the second bracket body 221, the thickness of the second overlapping portion 222 is smaller than that of the second bracket body 221, and the bottom surface of the second overlapping portion 222 is flush with the bottom surface of the second bracket body 221. The bottom surface of the second bracket body 221 is a surface of the second bracket body 221 away from the battery 11, and the bottom surface of the second overlapping portion 222 is a surface of the second overlapping portion 222 away from the battery 11.

For example, the thickness of the first sub-bracket 21 and the thickness of the second sub-bracket 22 are the same and H, the thickness of the first overlapping portion 212 is H1, and the thickness of the second overlapping portion 222 is H2, where h=h1+h2.

The first overlapping portion 212 and/or the second overlapping portion 222 are provided with a receiving portion for receiving the battery. That is, the battery is provided at the overlapping portion of the first sub-bracket 21 and the second sub-bracket 22, which improves the connection strength of the adjacent sub-brackets and also gives consideration to the energy density of the battery module.

In order to secure connection stability of the first sub-bracket 21 and the second sub-bracket 22, the first overlapping portion 212 and the second overlapping portion 222 have a dimension in the first direction larger than a gap between adjacent two cells 11 in the row of cells 11. In a possible embodiment, the receiving portion at the edge of the sub-carrier is divided into two parts, that is, the receiving portion at the edge of the sub-carrier is formed by the sub-receiving portions on the first overlapping portion 212 and the second overlapping portion 222 together.

At least one concave column is arranged on the sub bracket, and comprises a plurality of first accommodating parts arranged along a first direction; the first overlapping portion 212 is provided with a first sub-receiving portion, and the second overlapping portion 222 is provided with a second sub-receiving portion, the first sub-receiving portion and the second sub-receiving portion forming a second receiving portion, the second receiving portion being located at an end of the concave row.

On this basis, the thickness H2 of the second overlapping portion 222 is greater than the thickness H1 of the first overlapping portion 212. The second overlapping portion 222 is located at the bottom of the first overlapping portion 212, that is, the second overlapping portion 222 has a supporting function for the first overlapping portion 212, and the thickness H2 of the second overlapping portion 222 is set to be greater than the thickness H1 of the first overlapping portion 212, so that the connection stability of the battery bracket 20 can be improved.

In another possible embodiment, the depth of the accommodating portion is H3, and the depth of the accommodating portion is the dimension of the accommodating portion in the third direction. The thickness H1 of the first overlapping portion 212 is greater than the depth H3 of the receiving portion. At this time, the receiving portion at the end of the concave row is located at the first overlapping portion 212.

In the embodiment of the disclosure, a through hole may be provided on the bottom wall of the accommodating portion, and the through hole may be opposite to the explosion-proof valve of the battery 11, and the through hole is used for releasing pressure of the battery 11 after thermal runaway of the battery 11. The area of the through hole may be smaller than the area of the receiving portion.

It is noted that the battery tray 20 including the first sub-tray 21 and the second sub-tray 22 is exemplified in the embodiment of the present disclosure, but this does not represent that only two sub-trays are included in the battery tray 20. In practical applications, the number of sub-carriers in the battery carrier 20 may be three, four, five, or the like, which is not particularly limited in the embodiments of the present disclosure.

The exemplary embodiments of the present disclosure also provide a battery pack including the battery module 100 as shown in fig. 5.

A battery pack 10 and a battery bracket 20, the battery pack 10 including a plurality of batteries 11; the battery bracket 20 includes at least two sub-brackets arranged in a first direction, the sub-brackets are provided with receiving portions, the battery 11 is disposed in the receiving portions, the first sub-bracket 21 includes a first bracket body 211 and a first overlapping portion 212, the first overlapping portion 212 is disposed at one end of the first bracket body 211 near the second sub-bracket 22, the second sub-bracket 22 includes a second bracket body 221 and a second overlapping portion 222, the second overlapping portion 222 is disposed at one end of the second bracket body 221 near the first sub-bracket 21, the first overlapping portion 212 and the second overlapping portion 222 overlap, and the first sub-bracket 21 and the second sub-bracket 22 are two adjacent sub-brackets of the at least two sub-brackets.

The battery pack provided in this disclosure includes battery module 100, battery bracket 20 includes a plurality of sub-brackets in battery module 100, a plurality of sub-brackets are arranged along first direction, be provided with the holding portion that is used for installing battery 11 on the sub-bracket, realized installing battery 11 through a plurality of sub-battery brackets 20, can reduce the area of sub-bracket, be convenient for the manufacturing and the transportation of battery bracket 20, and then can promote the production efficiency of battery pack, further, in two adjacent sub-brackets, be provided with first overlapping portion 212 on first sub-bracket 21, be provided with second overlapping portion 222 on second sub-bracket 22, first overlapping portion 212 overlaps with second overlapping portion 222, the connection stability between the adjacent sub-bracket has been promoted, avoid the fracture in transportation or in-process adjacent sub-bracket junction, the yields of battery pack have been promoted.

Further, the battery pack provided in the embodiment of the present disclosure may further include a case 200, the case 200 may include a bottom plate (the second direction is perpendicular to the bottom plate) and a frame, the frame and the bottom plate are connected to form a battery 11 accommodating space, the battery pack 10 and the battery bracket 20 are disposed in the battery 11 accommodating space, and the battery bracket 20 is disposed between the battery pack 10 and the bottom plate.

The battery 11 is provided with an explosion-proof valve provided at one end of the battery 11 facing the battery bracket 20. An exhaust passage may be formed between the battery bracket 20 and the bottom plate, and the exhaust passage communicates with the explosion-proof valve after the thermal runaway of the battery 11, so as to exhaust high-temperature and high-pressure gas and liquid generated by the thermal runaway of the battery 11, and to release the pressure inside the battery pack.

Illustratively, the bottom of the battery carrier 20 is provided with a boss that extends in the first direction. The bottom of the battery bracket 20 is provided with a plurality of protrusions, and exhaust passages are formed between adjacent protrusions. On this basis, the battery bracket 20 includes a plurality of sub-brackets, the bottom of which is provided with a plurality of sub-bosses, the sub-bosses on the sub-brackets are in one-to-one correspondence, so that the sub-bosses can form bosses when the plurality of sub-brackets are connected.

The battery pack provided by the embodiment of the disclosure can be applied to an electric vehicle, and the battery pack is installed on the electric vehicle to provide energy for the electric vehicle. In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A battery module, characterized in that the battery module comprises:

a battery pack including a plurality of batteries;

the battery bracket comprises at least two sub-brackets, at least two sub-brackets are arranged along a first direction, an accommodating part is arranged on each sub-bracket, the battery is arranged on the accommodating part, a first sub-bracket comprises a first bracket body and a first overlapping part, the first overlapping part is arranged at one end of the first bracket body, which is close to a second sub-bracket, the second sub-bracket comprises a second bracket body and a second overlapping part, the second overlapping part is arranged at one end of the second bracket body, which is close to the first sub-bracket, the first overlapping part and the second overlapping part are overlapped in a second direction, the first sub-bracket and the second sub-bracket are two adjacent sub-brackets in at least two sub-brackets, and the second direction is perpendicular to one surface of the accommodating part of the sub-brackets.

2. The battery module of claim 1, wherein the battery carrier has a length L1, a width L2, and a length of the battery carrier along the first direction, and a width of the battery carrier along a third direction perpendicular to the first and second directions;

wherein the ratio of L2 to L1 is in the range of 2-20.

3. The battery module of claim 1, wherein the battery bracket further comprises:

the fixing piece is characterized in that the first overlapping part is provided with a first connecting part, the second overlapping part is provided with a second connecting part, and the fixing piece is connected with the first connecting part and the second connecting part.

4. The battery module of claim 3, wherein the fixing member is a hot-melt pillar.

5. The battery module of claim 1, wherein a thickness of the first overlap is less than a thickness of the first bracket body, and a top surface of the first overlap is flush with a top surface of the first bracket body;

the thickness of the second overlapping portion is smaller than that of the second bracket body, and the bottom surface of the second overlapping portion is flush with the bottom surface of the second bracket body.

6. The battery module of claim 5, wherein the thickness of the first bracket body and the thickness of the second bracket body are the same and H, the thickness of the first overlap portion is H1, and the thickness of the second overlap portion is H2, wherein H = h1+h2.

7. The battery module according to claim 6, wherein the depth of the receiving part is H3, and the thickness H1 of the first overlapping part is greater than the depth H3 of the receiving part.

8. The battery module according to claim 1, wherein the first overlapping portion and/or the second overlapping portion is provided with a receiving portion for receiving a battery.

9. The battery module according to claim 8, wherein at least one concave row including a plurality of first receiving parts arranged in the first direction is provided on the sub-bracket;

the first overlapping portion is provided with a first sub-accommodating portion, the second overlapping portion is provided with a second sub-accommodating portion, the first sub-accommodating portion and the second sub-accommodating portion form a second accommodating portion, and the second accommodating portion is located at the end portion of the concave row.

10. The battery module according to claim 9, wherein a thickness H2 of the second overlapping portion is greater than a thickness H1 of the first overlapping portion.

11. The battery module according to any one of claims 1 to 10, wherein the battery is a cylindrical battery or a hexagonal battery.

12. A battery pack, characterized in that the battery pack comprises the battery module according to any one of claims 1 to 11.