Battery pack and vehicle

Abstract

A battery pack and a vehicle, relating to the technical field of batteries. The battery pack comprises: a battery module (1), wherein the battery module (1) comprises a plurality of battery cells (11), each battery cell (11) comprises a first wall (111), a second wall (112) and a plurality of poles (113); and a case (2), wherein the case (2) comprises a frame (21) and a cover plate (22), the frame (21) and the cover plate (22) enclose a cavity (23), the battery module (1) is arranged in the cavity (23), a plurality of connecting portions (3) are arranged on the side of the cover plate (22) facing the cavity (23), the plurality of connecting portions (3) are spaced apart along a first direction (X), the first wall (111) of at least one battery cell (11) is fixedly connected to the corresponding connecting portion (3), and at least one pole (113) is provided between two adjacent connecting portions (3).

Description

Battery pack and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 5, 2024, with application number 202410166599X and patent name “A Battery Pack and Vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of battery technology, and specifically relates to a battery pack and a vehicle. Background Art

[0003] A battery is a device that converts and stores energy. In the field of electric vehicles, it is the core power source for the vehicle.

[0004] In related technologies, a power battery pack consists of a box and multiple battery cells, and the weight of the battery cells is mainly borne by the bottom plate and frame of the box. Therefore, high strength requirements are placed on the bottom plate and frame, which increases the thickness and weight of the bottom plate, which is not conducive to the lightweight design of the battery or the car.

[0005] Application Contents

[0006] The present application discloses a battery pack and a vehicle to solve, or at least partially solve, the problem that the base plate of the battery pack is heavy and it is not convenient to achieve a lightweight design of the battery pack.

[0007] The present application discloses a battery pack, comprising: a battery module having a first direction, a second direction and a third direction intersecting in pairs, the battery module comprising a plurality of battery cells, the battery cells comprising a first wall, a second wall and a plurality of poles, the first wall and the second wall being arranged opposite to each other, and the plurality of poles being arranged on the first wall at intervals along the first direction; a box body, the box body comprising a frame body and a cover plate, the frame body and the cover plate being connected and forming a cavity, the battery module being arranged in the cavity, the cover plate being provided with a plurality of connecting parts on a side facing the cavity, the plurality of connecting parts being arranged at intervals along the first direction, the first wall of the battery cell being fixedly connected to the connecting part, and at least one pole being provided between two adjacent connecting parts.

[0008] Optionally, the frame includes two side panels arranged opposite to each other along the first direction; the multiple connecting parts include a first connecting part and a second connecting part, and along the first direction, the first connecting part and the second connecting part are spaced apart, the first connecting part is located between two adjacent poles, and the second connecting part is located between the side panel and the pole close to the side panel; along the first direction, the maximum dimension of the first connecting part is W1, and the maximum dimension of the second connecting part is W2, and W1 is larger than W2.

[0009] Optionally, along the second direction, the pole protrudes from the first wall, and a maximum protruding dimension H1 of the pole is smaller than a maximum dimension H2 of the connecting portion.

[0010] Optionally, a buffer is provided between the pole and the cover plate, and along the second direction, one end of the buffer abuts against the cover plate, and the other end abuts against the end of the pole.

[0011] Optionally, an adhesive layer is provided between the connecting portion and the first wall, and along the second direction, one end of the adhesive layer is bonded to the connecting portion, and the other end is bonded to the first wall.

[0012] Optionally, the battery cell further includes a body and an insulating layer, the first wall and the second wall are formed on the body, the insulating layer at least covers the first wall, and a body exposed area is provided on the insulating layer, the first wall is at least partially exposed through the body exposed area, and the adhesive layer is at least located in the body exposed area and connects the body and the connecting part.

[0013] Optionally, the connecting portion and the cover plate are an integral structure.

[0014] Optionally, the cover plate protrudes toward one side of the battery cell to form the connecting portion.

[0015] Optionally, a groove is formed on a side of the cover plate facing away from the battery cell; along the second direction and on a plane perpendicular to the second direction, a projection of the connecting portion covers a projection of the groove.

[0016] Optionally, the battery pack further includes an information collection component, which is at least partially arranged between the cover plate and the first wall; along the first direction, the pole and the adjacent connecting portion are spaced apart and form a detection gap, and at least a portion of the information collection component extends into the detection gap, and the information collection component is used to collect at least one of the electrical signal information and temperature information of the battery cell.

[0017] Optionally, the information collection component includes an output part and multiple collection parts, one end of the collection part is connected to the output part, and the multiple collection parts are arranged side by side at the same end of the output part along the third direction. The collection part extends along the third direction and extends into the detection gap to collect at least one of the electrical signal information and temperature information of the battery cell. At least one connecting part is provided between two adjacent collection parts, and the output part protrudes from the end face of the battery module along the third direction.

[0018] Optionally, an end of the output portion away from the collecting portion is bent toward a side away from the cover plate.

[0019] Optionally, the frame includes a bottom plate and multiple side plates, the bottom plate is arranged opposite to the cover plate, and the multiple side plates are connected between the bottom plate and the cover plate and enclose the cavity; the battery pack also includes a support member, the support member is arranged between the bottom plate and the second wall, the support member abuts against the second wall, the support member is connected to the side plate, and the battery module is carried on the side of the support member close to the cover plate.

[0020] Optionally, the battery pack further includes a support member, which is disposed between the base plate and the second wall, abuts against the second wall, is connected to the base plate, and the battery module is supported on a side of the support member close to the cover plate.

[0021] Optionally, the second wall is provided with an explosion-proof valve, the support member and the base plate define an exhaust chamber, and a connecting port is provided on a side of the exhaust chamber close to the second wall, and along the second direction on a plane perpendicular to the second direction, the projection of the explosion-proof valve falls within the projection of the connecting port.

[0022] Optionally, the support member is a bearing plate, the exhaust chamber is formed between the bearing plate and the base plate, a through hole corresponding to the explosion-proof valve is provided on the bearing plate, the through hole is connected to the exhaust chamber, and the through hole forms the connecting port.

[0023] Optionally, the support member includes a plurality of support rods spaced apart along a third direction, the support rods and the explosion-proof valve are spaced apart along the third direction, two adjacent support rods and the bottom plate define the exhaust chamber, the exhaust chamber has an opening, the second wall covers the opening, and the opening forms the connecting port.

[0024] Optionally, along the second direction and on a plane perpendicular to the second direction, a projection of the support member and a projection of the connecting portion at least partially overlap.

[0025] An embodiment of the present application further provides a vehicle, comprising a battery pack as described in any one of the above items, wherein the cover plate is connected to the vehicle.

[0026] In this application, the first wall of the battery cell is connected to the connection portion on the cover plate. With the cover plate sharing the battery weight, the gravity of the battery cell can be directly transmitted to the electrical equipment through the cover plate, thereby reducing the stress on the bottom plate and frame of the box. Therefore, while carrying batteries of the same weight, the load design requirements of the bottom plate and frame can be reduced, thereby reducing the thickness and weight of the bottom plate and frame. This not only reduces the manufacturing cost of the bottom plate and frame, but also achieves a lightweight design of the battery pack. In addition, a gap is left between two adjacent connection portions, and at least one pole is arranged in the gap, thereby improving the vertical space utilization of the battery pack box.

[0027] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] FIG1 is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present application;

[0030] FIG2 is a schematic diagram of an exploded structure of a battery pack according to an embodiment of the present application;

[0031] FIG3 is an exploded schematic diagram of a partial structure of a battery pack according to an embodiment of the present application;

[0032] FIG4 is a cross-sectional view taken along line AA of FIG1 according to an embodiment of the present application;

[0033] FIG5 is an enlarged view of portion A of FIG4 in an embodiment of the present application;

[0034] FIG6 is a schematic diagram of the overall structure of a battery cell in an embodiment of the present application;

[0035] FIG7 is a bottom view of the structure of a battery cell in an embodiment of the present application;

[0036] FIG8 is a schematic diagram of the overall structure of another battery pack in an embodiment of the present application;

[0037] FIG9 is a cross-sectional view taken along line AA of FIG8 in the embodiment of the present application;

[0038] FIG10 is an enlarged view of portion A of FIG9 in an embodiment of the present application;

[0039] FIG11 is a schematic exploded view of another battery pack structure in an embodiment of the present application;

[0040] FIG12 is a schematic diagram of a partial explosion of another battery pack in an embodiment of the present application.

[0041] Reference numerals: 1. battery module; 11. battery cell; 111. first wall; 112. second wall; 113. pole; 114. body; 115. insulation layer; 116. exposed area of ​​body; 117. explosion-proof valve; 2. Box body; 21, frame body; 211, side panel; 212, bottom plate; 22, cover plate; 221, groove; 23, cavity; 3, connecting part; 31, first connecting part; 32, second connecting part; 4, buffer part; 5, adhesive layer; 6, information acquisition part; 61, output part; 62, acquisition part; 7, detection gap; 8, support part; 81, load-bearing plate; 811, through hole; 82, support rod; 9, electrical connection piece; 91, electrical connection piece between battery cells; 92, electrical connection piece between modules; 93, total positive / negative electrical connection piece; 10, exhaust chamber; 11, connecting port; 12, open port; X, first direction; Y, third direction; Z, second direction. Specific embodiments

[0042] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] 1 to 7 , an embodiment of the present application discloses a battery pack, which includes: a battery module 1, wherein the battery module 1 has a first direction X, a second direction Z, and a third direction Y intersecting in pairs; the battery module 1 includes a plurality of battery cells 11, the battery cells 11 include a first wall 111, a second wall 112, and a plurality of poles 113, the first wall 111 and the second wall 112 are arranged opposite to each other, and the plurality of poles 113 are arranged on the first wall 111 at intervals along the first direction X; a box body 2, wherein the box body 2 includes a frame body 21 and a cover plate 22, the frame body 21 and the cover plate 22 are connected to form a cavity 23, the battery module 1 is arranged in the cavity 23, and a plurality of connecting portions 3 are provided on a side of the cover plate 22 facing the cavity 23, the plurality of connecting portions 3 are arranged at intervals along the first direction X, the first wall 111 of the battery cell 11 is fixedly connected to the connecting portion 3, and at least one pole 113 is provided between two adjacent connecting portions 3.

[0044] Specifically, in one embodiment, the battery pack has a first direction X, a second direction Z, and a third direction Y that intersect in pairs. Optionally, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other. The battery module 1 includes a plurality of battery cells 11, and the number of the battery cells 11 is determined according to the design specifications of the battery pack. As shown in FIG2 , in this embodiment, two rows of battery cells 11 are arranged along the first direction X, and the two rows of battery cells 11 are arranged in the box 2. As shown in FIG6 and FIG7 , the battery cell 11 includes a first wall 111 and a second wall 112 that are arranged opposite to each other. Two poles 113 are provided on the first wall 111 along the first direction X, and the polarities of the two poles 113 are opposite.

[0045] 2 , the battery cells 11 are electrically connected to each other through electrical connectors 9 to form a battery module 1. The electrical connectors 9 include inter-cell electrical connectors 91, inter-module electrical connectors 92, and total positive / negative electrical connectors 93 for external output. A single row of battery cells 11 arranged along a first direction X is defined as a module. Adjacent battery cells 11 in each module are sequentially connected in series through the inter-cell electrical connectors 91, while adjacent modules are connected in series through the inter-module electrical connectors 92. Finally, the current of the battery pack is output with the help of the total positive / negative electrical connectors 93 for external output.

[0046] 2 and 3 , the frame 21 and the cover plate 22 of the box body 2 are connected to form a cavity 23 for placing the battery module 1, and the multiple connecting portions 3 on the cover plate 22 are arranged at intervals along the first direction X. It should be noted that this embodiment does not limit the connection method between the connecting portion 3 and the cover plate 22. Adhesion or welding can be adopted, or they can be integrally processed and formed. It is only necessary to be able to transfer the weight of the battery cell 11 to the cover plate 22 with the help of the connecting portion 3.

[0047] In some embodiments, referring to Figures 3, 4, and 5, the connecting portion 3 is specifically a plurality of hollow rods, with adjacent hollow rods spaced apart. The longitudinal direction of the hollow rods is parallel to the third direction Y in Figure 3. The hollow rods are welded to the cover plate 22, and the side of the hollow rods away from the cover plate 22 is bonded to the first wall 111 of the battery cell 11. Thus, the hollow rods distribute the weight of the battery cell 11 to the cover plate 22, thereby reducing the stress on the bottom plate 212. A gap is left between adjacent hollow rods, and all the poles 113 are arranged within the gap formed by the two adjacent hollow rods, fully utilizing the space in the second direction Z, thereby improving the space utilization within the battery pack case 2 and facilitating the miniaturization of the battery pack. When the battery pack is installed on a vehicle, the height of the vehicle chassis can be reduced, thereby reducing the risk of damage to the battery pack due to collisions.

[0048] In this embodiment, when assembling the battery pack, the first wall 111 of the battery cell 11 is connected to the connecting portion 3 on the cover plate 22, so that the weight of the battery cell 11 is shared by the cover plate 22 to reduce the force on the bottom plate 212. Therefore, under the premise of carrying batteries of the same weight, the design requirements of the bottom plate 212 can be lowered, thereby reducing the thickness and weight of the bottom plate 212, which not only reduces the processing cost of the bottom plate 212 but also realizes a lightweight design of the battery pack.

[0049] Optionally, referring to Figures 2 to 5, the frame 21 includes two side panels 211 arranged opposite to each other along the first direction X; the multiple connecting parts 3 include a first connecting part 31 and a second connecting part 32, and along the first direction X, the first connecting part 31 and the second connecting part 32 are arranged at intervals, the first connecting part 31 is located between two adjacent poles 113, and the second connecting part 32 is located between the side panel 211 and the pole 113 close to the side panel 211; along the first direction X, the maximum dimension of the first connecting part 31 is W1, and the maximum dimension of the second connecting part 32 is W2, and W1 is greater than W2.

[0050] Specifically, in one embodiment, as shown in Figure 2, the frame 21 includes a bottom plate 212, two side plates 211 arranged along the first direction X, and two flat plates arranged along the third direction Y. The bottom plate 212, the two side plates 211 and the two flat plates together form a rectangular frame 21; as shown in Figures 3 and 4, the multiple connecting parts 3 are divided into at least a first connecting part 31 and a second connecting part 32. There can be two second connecting parts 32, and the two second connecting parts 32 are respectively located at both ends of the first connecting part 31 along the first direction X. The first connecting part 31 and the second connecting part 32 are both connected to the first wall 111 of the battery cell 11 so that the cover plate 22 shares the weight of the battery cell 11.

[0051] As shown in Figures 4 and 5 , along the first direction X, the maximum dimension of the first connecting portion 31 is W1, and the maximum dimension of the second connecting portion 32 is W2. W1 is greater than W2, thereby increasing the contact area between the first connecting portion 31 and the battery cell 11. This allows the load-bearing force on the battery cell 11 to be primarily concentrated in the middle portion of the battery cell 11 and on the shoulder away from the side plate 211, thereby improving the connection reliability between the battery cell 11 and the cover plate 22 and enhancing the installation stability of the battery pack. Alternatively, there may be multiple first connecting portions 31. In this case, the multiple first connecting portions 31 are spaced apart between two second connecting portions 32.

[0052] Optionally, referring to FIG. 3 to FIG. 5 , along the second direction Z, the maximum dimension of the pole 113 is H1 , the maximum dimension of the connecting portion 3 is H2 , and H1 < H2 .

[0053] Specifically, in one embodiment, as shown in Figures 4 and 5, along the second direction Z, the height of the pole 113 is less than the thickness of the connecting portion 3. When the pole 113 extends into the gap formed by two adjacent connecting portions 3, the connecting portion 3 contacts the battery cell 11, and a gap is left between the end of the pole 113 away from the battery cell 11 and the cover plate 22. When the cover plate 22 is stepped on and deformed downward, the gap can act as a buffer space to prevent the pole 113 from directly bearing the force, thereby improving the safety of the battery pack.

[0054] In one embodiment, the height of the gap formed between the end of the pole 113 away from the battery cell 11 and the cover plate 22 is between 1 mm and 20 mm, thereby providing sufficient buffer space and saving space in the second direction Z to improve space utilization in the box 2.

[0055] Optionally, referring to FIG8-FIG10 , a buffer member 4 is provided between the pole 113 and the cover plate 22 . Along the second direction Z, one end of the buffer member 4 abuts against the cover plate 22 , and the other end abuts against the end of the pole 113 .

[0056] Specifically, in one embodiment, as shown in Figures 9 and 10, a buffer member 4 is provided between the end of the pole 113 away from the battery cell 11 and the cover plate 22. The buffer member 4 includes but is not limited to a rubber pad, silicone foam, etc., and only needs to play a role of deformation buffering when subjected to force. The buffer has insulating properties to ensure the electrical insulation of the battery pack and avoid the danger of electrical safety loss of the battery pack caused by insulation failure.

[0057] It should be noted that when the electrical connection piece 9 is provided at the end of the pole 113 , the electrical connection piece 9 can be regarded as the end of the pole 113 , that is, the buffer member 4 can be provided between the electrical connection piece 9 and the cover plate 22 .

[0058] Optionally, referring to Figures 8-10, an adhesive layer 5 is provided between the connecting portion 3 and the first wall 111. Along the second direction Z, one end of the adhesive layer 5 is bonded to the connecting portion 3, and the other end is bonded to the first wall 111.

[0059] Specifically, in one embodiment, as shown in Figures 9 and 10, an adhesive layer 5 is provided between the connecting portion 3 and the battery cell 11. The battery cell 11 is bonded to the connecting portion 3 by means of the adhesive layer 5, thereby sharing the weight of the battery cell 11 on the cover plate 22. The adhesive layer 5 includes but is not limited to silicone structural adhesive, epoxy resin adhesive, silicone rubber and polyurethane adhesive.

[0060] Optionally, referring to Figures 6 and 10, the battery cell 11 also includes a main body 114 and an insulating layer 115, the first wall 111 and the second wall 112 are formed on the main body 114, the insulating layer 115 at least covers the first wall 111, and a main body exposed area 116 is provided on the insulating layer 115, the first wall 111 is at least partially exposed through the main body exposed area 116, the adhesive layer 5 is at least located in the main body exposed area 116 and connects the main body 114 and the connecting portion 3.

[0061] Specifically, in one embodiment, the battery cell 11 includes a body 114 and an insulating layer 115. The body 114 is generally made of metal, and the insulating layer 115 is then covered on the body 114. A body exposed area 116 is provided on the first wall 111 of the battery cell 11 at all positions in contact with the connecting portion 3. In this embodiment, the body exposed area 116 is mainly provided at the shoulder and middle position of the battery cell 11. Since the insulating layer 115 has lower adhesion to the adhesive layer 5 than the body 114 made of metal or plastic, the body exposed area 116 is provided on the first wall 111 of the battery cell 11 so that the adhesive layer 5 is bonded to the surface of the body 114 exposed inside and outside the body exposed area 116, that is, the connecting portion 3 is directly bonded to the body 114, so as to improve the bonding strength and connection reliability between the adhesive layer 5 and the battery cell 11, thereby improving the modality of the battery pack.

[0062] Optionally, referring to FIG. 8 and FIG. 10 , the connecting portion 3 and the cover plate 22 are an integral structure.

[0063] Specifically, in one embodiment, the connecting portion 3 and the cover plate 22 are integrally formed, which can be specifically integrally stamped or integrally cast. The integral molding process is not limited here, and any process that can achieve integral molding of the connecting portion 3 and the cover plate 22 can be used; when the integral stamping process is adopted, referring to Figure 8, it can be stamped downward along the second direction Z, so that a bulge is formed on the side of the cover plate 22 close to the battery cell 11, and a depression is formed on the side of the cover plate 22 away from the battery cell 11. The bulge forms the connecting portion 3, and the two adjacent ones are The space formed between the protrusions is used to accommodate the pole 113 of the battery cell 11; accordingly, it can also be stamped upward along the second direction Z, so as to form a depression on the side of the cover plate 22 close to the battery cell 11, and a protrusion is formed on the side of the cover plate 22 away from the battery cell 11, the depression is used to accommodate the pole 113 of the battery cell 11, and the first wall 111 of the battery cell 11 can directly contact the side of the cover plate 22 close to the battery cell 11. At this time, the connecting portion 3 can be understood as the part where the cover plate 22 contacts the first wall 111 of the battery cell 11.

[0064] In this embodiment, the connecting portion 3 and the cover plate 22 are an integrated structure, which improves the connection strength between the connecting portion 3 and the cover plate 22, and the connecting portion 3 can serve as a reinforcing rib of the cover plate 22, thereby improving the structural strength of the cover plate 22 and reducing the probability of deformation of the cover plate 22 when under pressure.

[0065] Optionally, referring to Figures 9 and 11, the cover plate 22 protrudes toward one side of the battery cell 11 to form a connecting portion 3, and a groove 221 is formed on the side of the cover plate 22 away from the battery cell 11; along the second direction Z on a plane perpendicular to the second direction Z, the projection of the connecting portion 3 covers the projection of the groove 221.

[0066] Specifically, in one embodiment, the connecting portion 3 is a ridge integrally stamped and formed on the cover plate 22 along the second direction Z, and a groove 221 corresponding to the connecting portion 3 is formed on the side of the cover plate 22 away from the ridge; along the second direction Z on a plane perpendicular to the second direction Z, the projection of the groove 221 is limited by its own groove wall.

[0067] In this embodiment, the connecting portion 3 is formed by an integrated stamping process, which not only improves the connection strength between the connecting portion 3 and the cover plate 22, but also the connecting portion 3 can serve as a reinforcing rib of the cover plate 22, thereby improving the structural strength of the cover plate 22 and reducing the probability of deformation of the cover plate 22 when under pressure. At the same time, the design of the groove 221 can also reduce the weight of the cover plate 22, further achieving lightweighting.

[0068] Optionally, referring to Figures 10-12, the battery pack also includes an information collection component 6, which is at least partially arranged between the cover plate 22 and the first wall 111; along the first direction X, the pole 113 is spaced apart from the adjacent connecting portion 3 and forms a detection gap 7, and at least a portion of the information collection component 6 extends into the detection gap 7. The information collection component 6 is used to collect at least one of the electrical signal information and temperature information of the battery cell 11.

[0069] Specifically, in one embodiment, a detection gap 7 is left between the pole 113 and the adjacent connecting portion 3, and a portion of the information acquisition component 6 extends into the detection gap 7 and is connected to the pole 113 and the electrical connecting piece 9 on the battery cell 11 to detect at least one of the electrical signal information and temperature information on the battery cell 11, so as to be able to obtain the operating status of the battery cell 11 at any time to ensure the safe operation of the battery pack; in addition, partially arranging the information acquisition component 6 in the detection gap 7 can improve the space utilization rate in the battery box 2.

[0070] Optionally, referring to Figures 10-12, the information collection part 6 includes an output part 61 and multiple collection parts 62, one end of the collection part 62 is connected to the output part 61, and the multiple collection parts 62 are arranged side by side at the same end of the output part 61 along the third direction Y. The collection part 62 extends along the third direction Y and extends into the detection gap 7 to collect at least one of the electrical signal information and temperature information of the battery cell 11. At least one connecting part 3 is provided between two adjacent collection parts 62, and the output part 61 protrudes from the end face of the battery module 1 along the third direction Y.

[0071] Specifically, in one embodiment, the specific number of the collection parts 62 can be flexibly designed according to the number of collection objects; in this embodiment, there are two collection parts 62, and the two collection parts 62 are arranged on the same side of the output part 61. The two collection parts 62 and the output part 61 form a trouser-shaped information collection piece 6, and the two collection parts 62 are the trouser legs of the information collection piece 6; the information collection piece 6 can be made of a flexible circuit board, and an electrical isolation piece can be provided at the electrical connection between the flexible circuit board and the battery cell 11 to play a role of electrical insulation, thereby improving the safety of the battery pack; the two collection parts 62 respectively extend into two adjacent detection gaps 7, and are electrically connected to the pole 113 and the electrical connecting piece 9, so as to detect the electrical signal information and temperature signal information of the battery cell 11, and summarize and transmit the collected information to the outside through the output part 61, so that the operating status of the battery cell 11 can be obtained at any time to ensure the safe operation of the battery pack, and the collection part 62 is arranged in the detection gap 7, which can improve the space utilization rate in the battery box 2.

[0072] In addition, a connecting portion 3 is provided between the two collecting portions 62 to isolate the two collecting portions 62 and avoid interference between the two collecting portions 62 and affecting the collection accuracy; furthermore, the output portion 61 protrudes from the end face of the battery module 1 along the third direction Y, which is conducive to the output portion 61 being plugged into external electrical components to transmit the collected information to external electrical components (such as high-voltage modules, battery management systems, etc.).

[0073] Optionally, referring to FIG. 11 and FIG. 12 , one end of the output portion 61 away from the collecting portion 62 is bent toward a side away from the cover plate 22 .

[0074] Specifically, in one embodiment, one end of the output portion 61 away from the collecting portion 62 is bent toward the side away from the cover plate 22 to reduce the size of the output portion 61 along the third direction Y, thereby achieving the purpose of saving the space in the third direction Y in the box body 2, thereby improving the space utilization in the battery pack box body 2, and facilitating the miniaturization design of the battery pack.

[0075] Optionally, referring to Figures 2 and 3, the frame 21 includes a bottom plate 212 and multiple side plates 211, the bottom plate 212 is arranged opposite to the cover plate 22, and the multiple side plates 211 are connected between the bottom plate 212 and the cover plate 22 to form a cavity 23; the battery pack also includes a support member 8, the support member 8 is arranged between the bottom plate 212 and the second wall 112, the support member 8 is connected to the second wall 112, the support member 8 is connected to the bottom plate 212, and the battery module 1 is carried on the side of the support member 8 close to the cover plate 22.

[0076] In other embodiments, the support member 8 is connected to the side panel 211 , or the support member 8 is connected to both the side panel 211 and the bottom panel 212 .

[0077] Specifically, in some embodiments, the battery pack housing 2 includes a cover plate 22 and a frame 21. The frame 21 includes a bottom plate 212 and four side plates 211. The four side plates 211 are connected end to end to form a rectangular enclosure structure. The cover plate 22, bottom plate 212, and four side plates 211 form a rectangular parallelepiped housing 2 structure. The bottom plate 212 is fastened to the side plates 211 with bolts, and to improve the sealing of the housing 2, a sealing strip is provided in the gap between the bottom plate 212 and the side plates 211. In addition, the support member 8 is connected to the side plates 211 to support the battery cells 11. To improve the support stability of the support member 8, the support member 8 can also be connected to the bottom plate 212 at the same time.

[0078] Optionally, referring to Figures 2 and 7, the second wall 112 is provided with an explosion-proof valve 117, the support member 8 and the bottom plate 212 define an exhaust chamber 10, and the exhaust chamber 10 is provided with a connecting port 11 on one side close to the second wall 112. Along the second direction Z and on a plane perpendicular to the second direction Z, the projection of the explosion-proof valve 117 falls within the projection of the connecting port 11.

[0079] Specifically, in one embodiment, an explosion-proof valve 117 is provided on one side of the battery cell 11 near the bottom wall of the housing 2. When the battery overheats, air can be discharged through the explosion-proof valve 117 to prevent the battery from exploding. The bottom plate 212 and the support member 8 enclose an exhaust chamber 10. Along the second direction Z, on a plane perpendicular to the second direction Z, the projection of the explosion-proof valve 117 falls within the projection of the communication port 11. This allows airflow after the explosion of the explosion-proof valve 117 to enter the exhaust chamber 10 through the communication port 11, thereby improving the safety of the battery pack. Furthermore, the explosion-proof valve 117 is positioned toward the bottom wall of the housing 2 to prevent the explosion of the explosion-proof valve 117 from endangering the passenger compartment, thereby improving the safety of the vehicle. The projection of the communication port 11 can be understood as a shape enclosed by the projection of the port wall.

[0080] Optionally, referring to Figures 2, 4 and 9, the support member 8 is a supporting plate 81, and an exhaust chamber 10 is formed between the supporting plate 81 and the bottom plate 212. A through hole 811 corresponding to the explosion-proof valve 117 is provided on the supporting plate 81. The through hole 811 is connected to the exhaust chamber 10, and the through hole 811 forms the above-mentioned connecting port 11.

[0081] In other embodiments, the support member 8 includes a plurality of support rods 82, the plurality of support rods 82 are spaced apart along the third direction Y, the support rods 82 and the explosion-proof valve 117 are spaced apart along the third direction Y, and two adjacent support rods 82 and the bottom plate 212 define an exhaust chamber 10. At this time, the exhaust chamber has an opening 12, and the second wall 112 covers the opening 12, and the opening 12 forms the above-mentioned connecting port 11.

[0082] Specifically, in one embodiment, the support member 8 can be a supporting plate 81 or a plurality of support rods 82, so as to support the battery cell 11 while forming an exhaust chamber 10 with the bottom plate 212 for the airflow to enter after the explosion-proof valve 117 explodes.

[0083] As shown in Figures 2 to 4, when the support member 8 is a carrier plate 81, the carrier plate 81 is arranged parallel to the bottom plate 212, the carrier plate 81 can be welded to the side plate 211, and a plurality of through holes 811 are opened on the carrier plate 81. The through holes 811 correspond one-to-one to the explosion-proof valves 117 on the battery cells 11. An exhaust chamber 10 is formed between the carrier plate 81 and the bottom plate 212, and the airflow after the explosion of the explosion-proof valve 117 enters the exhaust chamber 10 through the through holes 811. In this embodiment, the formation of the exhaust chamber 10 can be achieved using a carrier plate 81, which can reduce the manufacturing process and thus reduce costs.

[0084] As shown in Figures 9 and 11, when the support member 8 is a plurality of support rods 82, the support rods 82 are spaced apart at the bottom of the battery cell 11, and the plurality of support rods 82 are arranged in parallel, and the support rods 82 are spaced apart from the explosion-proof valve 117 to prevent the support rods 82 from blocking the blasting airflow from entering the exhaust chamber 10.

[0085] The support rod 82 can be connected to the side plate 211, and a gap can be left between the support rod 82 and the bottom plate 212, so that the multiple exhaust chambers 10 surrounded by the support rod 82 are interconnected to expand the volume of the exhaust chamber 10; the support rod 82 and the bottom plate 212 can also be connected so that the bottom plate 212 bears part of the weight of the battery cell 11 to improve the overall structural stability of the battery pack.

[0086] In this embodiment, a formed support rod 82 is used as the support member 8, and there is no need to perform punching and other processes on the support member 8, thereby reducing processing costs.

[0087] In some embodiments, along the second direction Z and on a plane perpendicular to the second direction Z, a projection of the support member 8 and a projection of the connecting portion 3 at least partially overlap.

[0088] Specifically, in one embodiment, the support member 8 and the connecting portion 3 are arranged relative to each other along the second direction Z. The support member 8 and the connecting portion 3 form a clamping structure for the battery module 1 in the second direction Z, which can further improve the stability of the battery pack, thereby improving the safety of the battery pack.

[0089] An embodiment of the present application also discloses a vehicle, which includes the battery pack in any of the above embodiments.

[0090] In some embodiments, the cover 22 of the battery pack case 2 is connected to the body of the vehicle to transfer the gravity of the battery module 1 to the body through the cover 22, thereby reducing the weight of the battery pack case 1 and improving the structural strength and stability of the battery pack.

[0091] Specifically, a mounting structure may be provided on the cover plate 22, one end of the mounting structure being connected to the cover plate 22 and the other end being connected to the vehicle body. By installing the battery pack in a vehicle, the weight of the vehicle can be reduced and the safety of the vehicle can be improved.

[0092] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0093] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0094] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0095] In the claims, any reference signs placed between brackets shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, wherein: include: A battery module (1) has a first direction (X), a second direction (Z), and a third direction (Y) intersecting in pairs. The battery module (1) includes a plurality of battery cells (11), the battery cells (11) including a first wall (111), a second wall (112), and a plurality of poles (113). The first wall (111) and the second wall (112) are arranged opposite to each other, and the plurality of poles (113) are arranged on the first wall (111) at intervals along the first direction (X). A box (2), the box (2) comprising a frame (21) and a cover (22), the frame (21) and the cover (22) being connected to form a cavity (23), the battery module (1) being arranged in the cavity (23), a plurality of connecting portions (3) being provided on a side of the cover (22) facing the cavity (23), the plurality of connecting portions (3) being arranged at intervals along the first direction (X), the first wall (111) of the battery cell (11) being fixedly connected to the connecting portion (3), and at least one pole (113) being provided between two adjacent connecting portions (3).

2. The battery pack according to claim 1, wherein: The frame (21) comprises two side panels (211) arranged opposite to each other along the first direction (X); The multiple connecting portions (3) include a first connecting portion (31) and a second connecting portion (32); along the first direction (X), the first connecting portion (31) and the second connecting portion (32) are spaced apart, the first connecting portion (31) is located between two adjacent poles (113), and the second connecting portion (32) is located between the side plate (211) and the pole (113) close to the side plate (211); Along the first direction (X), the maximum dimension of the first connecting portion (31) is W1, and the maximum dimension of the second connecting portion (32) is W2, where W1 is greater than W2.

3. The battery pack according to claim 1, wherein: Along the second direction (Z), the pole (113) protrudes from the first wall (111), the maximum protruding dimension of the pole (113) is H1, and the maximum dimension of the connecting portion (3) is H2, satisfying: H1<H2.

4. The battery pack according to claim 1, wherein: A buffer member (4) is provided between the pole (113) and the cover plate (22); along the second direction (Z), one end of the buffer member (4) abuts against the cover plate (22), and the other end abuts against the pole (113).

5. The battery pack according to claim 1, wherein: An adhesive layer (5) is provided between the connecting portion (3) and the first wall (111); along the second direction (Z), one end of the adhesive layer (5) is bonded to the connecting portion (3), and the other end is bonded to the first wall (111).

6. The battery pack according to claim 5, wherein: The battery cell (11) further comprises a body (114) and an insulating layer (115); the first wall (111) and the second wall (112) are formed on the body (114); the insulating layer (115) at least covers the first wall (111); and a body exposed area (116) is provided on the insulating layer (115); the first wall (111) is at least partially exposed through the body exposed area (116); and the adhesive layer (5) is at least located within the body exposed area (116) and connects the body (114) and the connecting portion (3).

7. The battery pack according to claim 1, wherein: The connecting portion (3) and the cover plate (22) are an integral structure.

8. The battery pack according to claim 7, wherein: The cover plate (22) protrudes toward one side of the battery cell (11) to form the connecting portion (3).

9. The battery pack according to claim 8, wherein: A groove (221) is formed on a side of the cover plate (22) facing away from the battery cell (11); Along the second direction (Z) and on a plane perpendicular to the second direction (Z), the projection of the connecting portion (3) covers the projection of the groove (221).

10. The battery pack according to claim 1, wherein: The battery pack further includes an information collection component (6), wherein the information collection component (6) is at least partially disposed between the cover plate (22) and the first wall (111); Along the first direction (X), the pole (113) and the adjacent connecting portion (3) A detection gap (7) is arranged at intervals to form a detection gap, and at least a portion of the information collection component (6) extends into the detection gap (7). The information collection component (6) is used to collect at least one of electrical signal information and temperature information of the battery cell (11).

11. The battery pack according to claim 10, wherein: The information collection component (6) comprises an output portion (61) and a plurality of collection portions (62), one end of the collection portion (62) being connected to the output portion (61), and the plurality of collection portions (62) being arranged side by side at the same end of the output portion (61) along the third direction (Y), the collection portion (62) extending along the third direction (Y) and extending into the detection gap (7) to collect at least one of the electrical signal information and temperature information of the battery cell (11), at least one connecting portion (3) being arranged between two adjacent collection portions (62), and the output portion (61) protruding from the end face of the battery module (1) along the third direction (Y).

12. The battery pack according to claim 11, wherein: One end of the output portion (61) away from the collecting portion (62) is bent toward a side away from the cover plate (22).

13. The battery pack according to claim 1, wherein: The frame (21) comprises a bottom plate (212) and a plurality of side plates (211), the bottom plate (212) and the cover plate (22) are arranged opposite to each other, and the plurality of side plates (211) are connected between the bottom plate (212) and the cover plate (22) to enclose the cavity (23); The battery pack further comprises a support member (8), wherein the support member (8) is arranged between the bottom plate (212) and the second wall (112), the support member (8) abuts against the second wall (112), the support member (8) is connected to the side plate (211), and the battery module (1) is supported on a side of the support member (8) close to the cover plate (22).

14. The battery pack according to claim 13, wherein: The battery pack further comprises a support member (8), wherein the support member (8) is arranged between the base plate (212) and the second wall (112), the support member (8) abuts against the second wall (112), the support member (8) is connected to the base plate (212), and the battery module (1) is supported on a side of the support member (8) close to the cover plate (22).

15. The battery pack according to claim 13, wherein: The second wall (112) is provided with an explosion-proof valve (117), the support member (8) and the bottom plate (212) define an exhaust chamber (10), and a communication port (11) is provided on a side of the exhaust chamber (10) close to the second wall (112), and along the second direction (Z) on a plane perpendicular to the second direction (Z), the projection of the explosion-proof valve (117) falls within the projection of the communication port (11).

16. The battery pack according to claim 15, wherein: The support member (8) is a bearing plate (81), and the exhaust chamber (10) is formed between the bearing plate (81) and the bottom plate (212). A through hole (811) corresponding to the explosion-proof valve (117) is provided on the bearing plate (81), and the through hole (811) is communicated with the exhaust chamber (10), and the through hole (811) forms the communication port (11).

17. The battery pack according to claim 15, wherein: The support member (8) includes a plurality of support rods (82) spaced apart along the third direction (Y), the support rods (82) and the explosion-proof valve (117) being spaced apart along the third direction (Y), two adjacent support rods (82) and the bottom plate (212) defining the exhaust chamber (10), the exhaust chamber (10) having an opening (12), the second wall (112) covering the opening (12), and the opening (12) forming the connecting port (11).

18. The battery pack according to claim 13, wherein: Along the second direction (Z) and on a plane perpendicular to the second direction (Z), a projection of the support member (8) and a projection of the connecting portion (3) at least partially overlap.

19. A vehicle, wherein A battery pack comprising any one of claims 1 to 18, wherein the cover plate (22) is connected to the vehicle.

Images