CN219350500U

CN219350500U - Battery module and battery pack

Info

Publication number: CN219350500U
Application number: CN202320039893.5U
Authority: CN
Inventors: 叶进勇; 陈昌奎; 郭立立; 程志刚
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-07-14
Anticipated expiration: 2033-01-06

Abstract

The utility model discloses a battery module and a battery pack, wherein a first bending part and a second bending part are arranged on a side plate of the battery module, so that the rigidity and the strength of the side plate are effectively improved, a connecting structure with larger strength is provided for being connected with a battery pack component when the battery pack is assembled, so that the firmness and the stability of the assembly between the battery module and the box are ensured when the battery module and the box are assembled to form the battery pack, a fixing point can be provided for the battery pack component outside the battery module by a mounting bracket, the pre-positioning guiding function for the battery module to be arranged in the box is formed, and the accuracy of the assembly positioning between the battery module and the box is improved; the installing support can provide the fixed point for the part of battery module and battery package, and the convenience and the stability of battery module follow-up vanning equipment become the battery package of being convenient for, and can dismantle between installing support and the second kink and be connected, the dismouting between installing support and the curb plate of being convenient for does benefit to follow-up maintenance and maintenance.

Description

Battery module and battery pack

Technical Field

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

Background

Environmental energy problems are becoming more serious, and low-carbon and environment-friendly energy has become a necessary choice for future economic development. Hybrid vehicles and electric vehicles have evolved and are supported by consumer acceptance and government as representatives of new energy vehicles. The power battery module is used as a main power source of the new energy automobile and has become a main component and key technology of the electric automobile.

At present, a battery module generally comprises a bottom plate, two side plates and two end plates, wherein the common side plates are used for positioning a plurality of arranged battery cells in the battery module, and cannot well provide positioning and supporting effects when the module is assembled into a battery pack, so that the battery module is not beneficial to being assembled into the battery pack.

Accordingly, the prior art has drawbacks and improvements are urgently needed.

Disclosure of Invention

The utility model aims to provide a battery module, which solves the problem that the side plate in the current battery module is too single in functionality and is not beneficial to the assembly of the battery module into a battery pack, and improves the practicability of the side plate.

The embodiment of the utility model provides a battery module, which comprises a battery pack and a bottom plate, wherein the bottom of the battery pack is arranged on the bottom plate, and the battery module further comprises: the battery pack comprises two opposite side plates, wherein the two side plates are respectively arranged at two ends of the battery pack in the width direction, a first bending part and a second bending part are arranged at the top of each side plate, the first bending part extends from the top of each side plate towards the direction close to the battery pack, and the second bending part is connected with the first bending part and extends towards the direction far away from the top of each side plate; and the mounting bracket is detachably connected with the second bending part.

Optionally, the mounting bracket includes a connection portion and a mounting portion fixedly connected to the connection portion; wherein the connecting part is used for being detachably connected with the second bending part; the mounting part is used for being connected with the box body of the battery pack.

Optionally, a first connecting hole is formed in the second bending part, and a second connecting hole corresponding to the first connecting hole is formed in the connecting part; the connecting part is detachably connected with the second bending part through fasteners respectively matched with the first connecting hole and the second connecting hole.

Optionally, the first bending part is contacted and connected with the bottom of the connecting part far away from the installation part, and the first bending part supports the connecting part.

Optionally, the connecting portion with the installation department is "L" shape, the second kink is kept away from first kink one end protrusion is provided with the bulge, the connecting portion pass through the bulge with the connection can be dismantled to the second kink, the bulge with the installation department is close to the surface looks butt of group battery, in order to support the installation department.

Optionally, the first bending part is recessed toward a side close to the battery pack, and the second bending part is recessed toward a side far away from the battery pack.

Optionally, the mounting portion is provided with a positioning column for positioning the battery module and the case of the battery pack in advance.

Optionally, the battery pack includes a plurality of battery cells; the side plate is provided with a plurality of convex hulls, and the convex hulls extend from the inner wall surface of the side plate towards the direction close to the battery cell; a first insulating plate is arranged between the side plate and the battery pack, a third bending part is arranged at the bottom of the first insulating plate, and the third bending part bends from the inner wall surface of the side plate to the outer wall of the side plate; and a through hole for the convex hull to pass through is formed in the surface of the first insulating plate.

Meanwhile, the embodiment of the application also provides a battery pack, which comprises a plurality of battery modules as described above, and a plurality of battery modules are connected in series or in parallel.

In summary, the present utility model provides a battery module, including a battery pack and a bottom plate, wherein the bottom of the battery pack is fixed on the bottom plate, and the battery module further includes: the two side plates are oppositely arranged and are arranged at two ends of the battery pack in the width direction, the top of each side plate extends towards the direction close to the battery pack and is provided with a first bending part, and the end part of the first bending part extends towards the top of the side plate and is provided with a second bending part; and the mounting bracket is detachably connected with the second bending part. The first bending part and the second bending part can effectively improve the rigidity of the side plate, and provide a connecting structure with larger strength for being connected with a battery pack component when the battery pack is assembled, so that the firmness and stability of the assembly between the battery module and the box body are ensured when the battery module and the box body are assembled to form the battery pack, the mounting bracket can provide a fixed point for the battery pack component outside the battery module, the pre-positioning guiding function for the battery module to be arranged in the box body is formed, and the accuracy of the assembly and positioning between the battery module and the box body is improved; the installing support can provide the fixed point for the part of battery module and battery package, and the convenience and the stability of battery module follow-up vanning equipment become the battery package of being convenient for, and can dismantle between installing support and the second kink and be connected, the dismouting between installing support and the curb plate of being convenient for does benefit to follow-up maintenance and maintenance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1;

fig. 3 is a schematic exploded view of a structure of a battery module according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a side plate and a second insulating plate in the battery module according to the embodiment of the utility model;

fig. 5 is a schematic structural view of a side plate and a first insulating plate in the battery module according to the embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the structure at B of FIG. 5;

fig. 7 is a schematic view illustrating an assembled structure of a side plate and a mounting bracket in the battery module according to the embodiment of the utility model.

The main reference numerals illustrate:

1. the battery module, 11, the group battery, 111, battery monomer, 12, bottom plate, 13, curb plate, 131, first kink, 132, second kink, 1321, bulge, 133, convex hull, 134, first insulating board, 1341, through-hole, 135, third kink, 136, first accommodation groove, 137, fourth kink, 138, first connecting hole, 14, installing support, 141, connecting portion, 142, installing portion, 143, second connecting hole, 144, reference column, 15, end plate, 151, second accommodation groove, 16, connecting terminal, 17, second insulating board, 18, fastener.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify 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.

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 or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the two components can be mechanically connected, can be directly connected or can be indirectly connected through an intermediate medium, and can be communicated with each other. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In some embodiments, referring to fig. 1 to 7, there is provided a battery module 1, the battery module 1 including: battery pack 11, bottom plate 12, side plate 13, and mounting bracket 14.

Referring to fig. 1 to 3, the battery pack 11 has a length direction X, a width direction Y, and a height direction Z, which are orthogonal to each other, and the battery pack 11 includes a plurality of battery cells 111 stacked in the length direction X. The bottom surface of the battery pack 11 in its height direction Z is provided on the bottom plate 12. The number of the side plates 13 is two, and the two side plates 13 are disposed opposite to each other, specifically, the two side plates 13 are disposed at both ends of the battery pack 11 in the width direction Y, respectively.

Referring to fig. 4 to 6, the side plate 13 is provided at the top thereof in the height direction Z with a first bending part 131 and a second bending part 132, the top of the side plate 13 is bent and extended in the width direction Y toward the direction toward the battery pack 11 to form the first bending part 131, the second bending part 132 is connected to the first bending part 131 and extended in the direction away from the top of the side plate 13, and specifically, one side of the first bending part 131 away from the top of the side plate 13 is bent and extended upward in the height direction Z to form the second bending part 132.

The side plate 13, the first bending part 131 and the second bending part 132 are integrally formed, and the first bending part 131 and the second bending part 132 are formed by bending the side plate 13 twice during manufacturing, so that the overall strength and rigidity of the side plate 13 can be improved. Specifically, the first bending part 131 is recessed and bent along the width direction Y toward the side close to the battery pack 11, the second bending part 132 is recessed and bent along the height direction Z toward the side far away from the battery pack 11, and the first bending part 131 and the second bending part 132 are bent in such a manner that the side plate 13 can provide a connection structure with a relatively high strength for connection with the outside, so that the battery module 1 has relatively high mounting strength as a whole when the battery module 1 is assembled with the case to form a battery pack, and stability and firmness of assembly of the battery module 1 and the case are improved. Referring to fig. 2, the first bending portion 131 is bent above the top surface of the battery pack 11 in the height direction Z, and a gap is left between the first bending portion 131 and the top surface of the battery pack 11 in the height direction Z, so as to limit the battery pack 11 in the height direction Z and prevent the battery pack 11 from shaking.

Referring to fig. 4, the mounting bracket 14 is detachably coupled to the second bending portion 132. Specifically, the mounting bracket 14 includes a connection portion 141 and a mounting portion 142 fixedly connected to the connection portion 141, the connection portion 141 extends along the height direction Z, the mounting portion 142 extends along the width direction Y, the connection portion 141 is connected to the mounting portion 142 to form an L-shaped structure, the mounting bracket 14 is detachably connected to the second bending portion 132 through the connection portion 141, and the mounting portion 142 is used for fixing the battery module 1 to the outside, for example, to a case for carrying the battery module 1. It should be noted that: the connecting portion 141 and the mounting portion 142 are connected to form an L-shaped structure, and may be perpendicular to each other or have a certain inclination. For example, the angle between the connecting portion 141 and the mounting portion 142 is in the range of 85 ° to 95 °.

In this embodiment, referring to fig. 1, 3, 4, 5 and 7, the second bending portion 132 is provided with a protruding portion 1321 protruding from one end of the second bending portion 131 in the height direction Z, the protruding portion 1321 is provided in the middle section of the second bending portion 132 in the length direction Z, the protruding portion 1321 is provided with a first connecting hole 138, the connecting portion 141 is detachably connected with the second bending portion 132 through the protruding portion 1321, specifically, the connecting portion 141 is provided with a second connecting hole 143 corresponding to the first connecting hole 138, the connecting portion 141 is detachably connected with the second bending portion 132 through a fastener 18 respectively matched with the first connecting hole 138 and the second connecting hole 143, the fastener 18 is a bolt, the first connecting hole 138 and the second connecting hole 143 are in interference fit, and the connecting portion 141 and the second connecting hole 143 sequentially penetrate through the first connecting hole 138 and the second connecting hole 143 by using a pressure riveting method, so as to realize detachable connection between the connecting portion 141 and the second bending portion 132, specifically, the connecting portion 141 and the second bending portion 132 are provided with a second connecting hole 143 corresponding to the first connecting hole 138, the connecting portion 18 is provided with a fastener 18, and the subsequent mounting bracket 14 is reliably connected with the second bending portion 132, and the subsequent mounting bracket is easy to be maintained, and maintenance is convenient.

Wherein, the top of the protruding portion 1321 in the height direction Z abuts against the mounting portion 142, and the protruding portion 1321 forms a support to the mounting portion 142 in the height direction Z, thereby forming a support to the mounting bracket 14 in the height direction Z to ensure the stability of the mounting bracket 14. The protruding portion 1321 is a flat plate structure, and the protruding portion 1321 is in plane contact with the connecting portion 141, so that the protruding portion 1321 is tightly attached to the connecting portion 141, and stability and firmness of assembly between the side plate 13 and the mounting bracket 14 are ensured.

In other implementations, the second bending portion 132 may not have the protruding portion 1321, that is, the first connecting hole 138 is disposed on the second bending portion 132, and the mounting bracket 14 is detachably connected to the second bending portion 132 through the connecting portion 141, but due to the bending design of the second bending portion 132, a transitional connection structure, such as a soft rubber, may be disposed between the second bending portion 132 and the connecting portion 141, so as to ensure the connection strength and the connection stability between the second bending portion 132 and the connecting portion 141.

In addition, referring to fig. 3, the first bending portion 131 is in contact connection with the bottom of the mounting bracket 14, specifically, one end of the connecting portion 141 of the mounting bracket 14, which is close to the first bending portion 131 in the height direction Z (i.e., the bottom of the mounting bracket 14), is abutted against the first bending portion 131, and the first bending portion 131 forms a support for the connecting portion 141, thereby forming a support for the mounting bracket 14 in the height direction Z to ensure the stability of the mounting bracket 14.

In addition, referring to fig. 1, 3 and 7, the positioning column 144 is provided on the mounting portion 142, the positioning column 144 extends along the height direction Z, and the design of the positioning column 144 can realize assembly guidance of the battery module 1 when the battery module 1 is packaged to form a PACK (battery PACK), so that assembly efficiency is improved.

In addition, referring to fig. 4, a plurality of convex hulls 133 are protruding on the side plate 13, the convex hulls 133 extend from the inner wall surface of the side plate 13 towards the direction close to the battery cells 111, specifically, the convex hulls 133 are protruding on one surface of the side plate 13 towards the battery pack 11, the convex hulls 133 extend along the width direction Y to be abutted against the adjacent side wall of the battery pack 11 along the width direction Y, after the plurality of battery cells 111 are stacked along the respective thickness directions to form the battery pack 11, glue needs to be coated on the two side end walls of the battery cells 111 oppositely arranged along the width direction Y so as to realize the assembly of the side plate 13 and the battery pack 11, the convex hulls 133 are designed, the minimum value of the distance between the side plate 13 and the side end wall of the battery pack 11 along the width direction Y is the protruding distance of the convex hulls 133, namely, the side plate 13 is abutted against the side end wall of the battery cells 111 along the width direction Y, and the coating thickness of the glue on the side end wall of the battery cells 111 can be designed to be the protruding distance of the convex hulls 133 along the width direction Y, so that the coating thickness of the glue can meet the minimum consumption of the side plate 13 and the manufacturing cost of the battery pack 11 is reduced, and the manufacturing cost of the battery pack 11 is required.

In addition, referring to fig. 1, 3 and 5, the battery module 1 further includes a first insulating plate 134, the first insulating plate 134 is disposed between the side plate 13 and the side end wall of the battery pack 11, a third bending portion 135 is disposed at the bottom of the first insulating plate 134, the third bending portion 135 is bent from an inner wall surface of the side plate 13 (i.e. a surface of the side plate 13 facing the battery pack 11) to an outer wall surface of the side plate 13 (i.e. a surface of the side plate 13 facing away from the battery pack 11), and a first accommodating groove 136 is provided, at least a bottom of the side plate 13 in the height direction Z is accommodated in the first accommodating groove 136, and a through hole 1341 for the protrusion 133 to pass through is formed on a surface of the first insulating plate 134. The third bending part 135 is designed to form a coating on one end, close to the bottom plate 12, of the side plate 13 in the height direction Z, so that the design of a bottom support structure of the side plate 13 is reduced, the side plate 13 does not need to coat the bottom plate 12 through the bottom support, the manufacturing cost is reduced, the thickness of the heat conduction structural adhesive coated on the bottom surface of the battery pack 11 in the height direction Z can be reduced, and the heat management performance of the battery module 1 is ensured.

In addition, referring to fig. 1 and 3, the battery module 1 further includes two end plates 15, the number of the end plates 15 is two, the two end plates 15 are respectively disposed at two ends of the battery pack 11 in the length direction X, the two sides of the end plate 15 in the width direction Y are respectively provided with a second accommodating groove 151, the two ends of the side plate 13 in the length direction X are respectively provided with a fourth bending part 137, the two fourth bending parts 137 are respectively bent to one surface of the adjacent end plate 15, which faces away from the battery pack 11, along the width direction Y, and the fourth bending parts 137 are accommodated in the second accommodating grooves 151 to form a coating on the end plate 15, so that the firmness of assembling between the end plate 15 and the battery pack 11 is enhanced.

In addition, referring to fig. 1 to 4, the battery module 1 further includes connection terminals 16 and second insulating plates 17, the number of the connection terminals 16 is two, the connection terminals 16 are provided at both ends of the top surface of the battery pack 11 in the length direction X at intervals, the connection terminals 16 extend in the height direction Z, the connection terminals 16 are electrically connected to the battery pack 11 at the lower ends of the height direction Z, the battery module 1 is electrically connected to external devices through the connection terminals 16, the second insulating plates 17 are provided at the tops of the side plates 13 in the height direction Z, two second insulating plates 17 are provided on each side plate 13, the two second insulating plates 17 are provided at both ends of the side plates 13 in the length direction X at intervals, the second insulating plates 17 extend from positions of the outer wall surfaces of the side plates 13 near the tops to the inner wall surfaces of the side plates 13, specifically, the second insulating plates 17 form a coating for the second bending parts 132, the first bending parts 131, and the tops of the first insulating plates 134, and are provided at least in correspondence to the positions of the connection terminals 16, in this embodiment, the two connection terminals 16 are provided on the same side, two second insulating plates 17 are provided on the same side, and two insulating plates 17 are provided on the same side, and correspond to the two insulating plates 17 on the side plates 13. After the side plate 13 is assembled with the side end wall of the battery pack 11 in the width direction Y, the distance between the side plate 13 and the battery cell 111 is too short, and the second insulating plate 17 covers the side plate 13 to achieve the purpose of increasing the creepage distance, so as to ensure the use safety of the battery module 1.

Meanwhile, the embodiment of the application also provides a battery pack, which comprises a plurality of battery modules 1 as described above, and a plurality of battery modules 1 are connected in series or in parallel.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The foregoing has outlined the detailed description of the embodiments of the present utility model, and the detailed description of the principles and embodiments of the present utility model is provided herein by way of example only to facilitate the understanding of the method and core concepts of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. The utility model provides a battery module, includes group battery (11) and bottom plate (12), the bottom of group battery (11) set up in on bottom plate (12), its characterized in that, battery module still includes:

two side plates (13) which are oppositely arranged, wherein the two side plates (13) are respectively arranged at two ends of the battery pack (11) in the width direction (Y), a first bending part (131) and a second bending part (132) are arranged at the top of the side plate (13), the first bending part (131) extends from the top of the side plate (13) towards the direction close to the battery pack (11), and the second bending part (132) is connected with the first bending part (131) and extends towards the direction far away from the top of the side plate (13); and

and the mounting bracket (14) is detachably connected with the second bending part (132).

2. The battery module according to claim 1, wherein the mounting bracket (14) includes a connection portion (141) and a mounting portion (142) fixedly connected to the connection portion (141); wherein the method comprises the steps of

The connecting part (141) is used for being detachably connected with the second bending part (132);

the mounting part (142) is used for being connected with the box body of the battery pack.

3. The battery module according to claim 2, wherein the second bending part (132) is provided with a first connection hole (138), and the connection part (141) is provided with a second connection hole (143) corresponding to the first connection hole (138);

the connecting part (141) is detachably connected with the second bending part (132) through a fastener (18) respectively matched with the first connecting hole (138) and the second connecting hole (143).

4. The battery module according to claim 2, wherein the first bending part (131) is in contact connection with the connection part (141) away from the bottom of the mounting part (142), and the first bending part (131) supports the connection part (141).

5. The battery module according to claim 4, wherein the connecting portion (141) and the mounting portion (142) are in an L shape, a protruding portion (1321) is provided at one end of the second bending portion (132) away from the first bending portion (131) in a protruding manner, the connecting portion (141) is detachably connected to the second bending portion (132) through the protruding portion (1321), and the protruding portion (1321) abuts against a surface of the mounting portion (142) close to the battery pack (11) to support the mounting portion (142).

6. The battery module according to any one of claims 1 to 5, wherein the first bent portion (131) is recessed toward a side close to the battery pack (11), and the second bent portion (132) is recessed toward a side remote from the battery pack (11).

7. The battery module according to claim 2, wherein the mounting portion (142) is provided with a positioning column (144) for pre-positioning the battery module with a case of a battery pack.

8. The battery module according to claim 1, wherein the battery pack (11) includes a plurality of battery cells (111);

the side plate (13) is provided with a plurality of convex hulls (133), and the convex hulls (133) extend from the inner wall surface of the side plate (13) towards the direction approaching the battery cell (111);

a first insulating plate (134) is arranged between the side plate (13) and the battery pack (11), a third bending part (135) is arranged at the bottom of the first insulating plate (134), and the third bending part (135) bends from the inner wall surface of the side plate (13) to the outer wall of the side plate (13);

and a through hole (1341) for the convex hull (133) to pass through is formed in the surface of the first insulating plate (134).

9. The battery module according to claim 8, wherein the battery module further comprises:

at least one connection terminal (16), wherein the connection terminal (16) is used for electrically connecting the battery pack (11), and the battery module is electrically connected with the outside through the connection terminal (16); wherein the method comprises the steps of

The top of curb plate (13) is provided with second insulation board (17), second insulation board (17) follow curb plate (13) outer wall surface is close to the position at top and extends to curb plate (13) inner wall surface, and at least correspond the position setting of connecting terminal (16).

10. A battery pack, characterized in that the battery pack comprises a plurality of battery modules according to any one of claims 1 to 9, and a plurality of the battery modules are connected in series or in parallel.