Battery system

Abstract

To provide a battery system capable of effectively reducing the size of the entire battery system.SOLUTION: A battery system includes a housing, a mounting bracket, a first adhesive agent, and a cover, and an accommodation cavity is formed in the housing. The mounting bracket may be disposed at an opening position of the accommodation cavity, and the mounting bracket may include a first bracket and a second bracket connected to each other. The housing forms an inner wall of the accommodation cavity, and the first bracket and the second bracket form one sealing groove. The first adhesive agent is disposed in the seal groove. The cover is fixed to one end of the housing, and at least a part of the cover is connected to the first adhesive agent.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically to battery systems.

[0002] This application claims the priority of a Chinese patent application with the application number 202420141547.2 filed with the Chinese Patent Office on January 19, 2024, and all the contents of this application are incorporated herein by reference.

Background Art

[0003] In the prior art, a low-voltage battery system is applied to an electric vehicle and is formed by assembling components such as battery modules, battery management systems, and integrated busbars in a housing.

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the internal structure of the prior art low-voltage battery system does not rationally utilize the internal space of the housing of the low-voltage battery system, the overall size of the low-voltage battery system is relatively large. On the other hand, since the interior space of an electric vehicle is limited, it is necessary to make a reduction adjustment to the overall size of the low-voltage battery system, and thus provide a more feasible solution for the in-vehicle arrangement of the low-voltage battery system.

Means for Solving the Problems

[0005] This application provides a battery system, which includes a housing, in which an accommodation cavity is formed, and the accommodation cavity is configured to accommodate a battery module, and An attachment bracket (221) provided at the opening position of the accommodation cavity and including a first bracket and a second bracket connected to each other, wherein the first bracket extends toward the inner wall of the accommodation cavity, and the second bracket is provided on the side of the first bracket away from the accommodation cavity and extends along the direction away from the accommodation cavity, the housing forms the inner wall of the accommodation cavity, and the first bracket and the second bracket form one seal groove, and the attachment bracket, A first adhesive installed in the seal groove, A cover fixed to one end of the housing and at least partially connected to the first adhesive.

Advantages of the Invention

[0006] In the technical solution of the present application, since the attachment bracket is installed in the accommodation cavity, the seal groove is formed by being surrounded by the first bracket and the second bracket in the attachment bracket and the inner wall of the housing, that is, the combination of different components (attachment bracket and housing) forms the seal groove, effectively utilizing the space of the accommodation cavity inside the housing, eliminating the need to provide another seal groove for sealing between the housing and the cover on the housing or other components, thereby effectively reducing the size of the entire battery system.

Brief Description of the Drawings

[0007]

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Mode for Carrying Out the Invention

[0008] In the description of the present application, unless otherwise explicitly specified or limited, the terms "connected to each other", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral body, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, a communication inside two elements, or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to specific situations.

[0009] In this application, unless there are explicit provisions and limitations, for the first feature to be "above" or "below" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature not being in direct contact with the second feature and being in contact through other features therebetween. Also, for the first feature to be "above", "above the top", "upper surface" of the second feature indicates that the first feature is directly above and diagonally above the second feature, and that the first feature is higher than the second feature in the horizontal direction, etc. For the first feature to be "below", "below the bottom", "lower surface" of the second feature indicates that the first feature is directly below and diagonally below the second feature, and that the first feature is lower than the second feature in the horizontal direction, etc.

[0010] In the description of this embodiment, terms related to directions or positional relationships such as "above", "below", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings and are for the purpose of simplifying the description and operation, and do not indicate or imply a device or element having a specific direction, a configuration and operation in a specific direction, and thus should not be construed as limiting this application. Furthermore, "first", "second", etc. are for the purpose of distinction in the description and do not have a special meaning.

[0011] This application provides a battery system, and FIGS. 1 to 14 are some embodiments of this application. Here, as shown in FIGS. 1 to 14, the Z direction is the first direction, the Y direction is the second direction, and the X direction is the third direction. The first direction, the second direction, and the third direction intersect with each other. The angle formed by any two of the first direction, the second direction, and the third direction may be 80°, 85°, 90°, 95°, 100°, and is not limited thereto. In the following embodiments, the case where the angle formed by any two of the first direction, the second direction, and the third direction is 90° will be taken as an example for description. That is, by establishing a three-dimensional rectangular coordinate system with the first direction, the second direction, and the third direction, some embodiments of this application will be interpreted and described. Note that the fact that the angle formed by any two of the first direction, the second direction, and the third direction is 90° is not a limitation on the solutions according to the following embodiments of this application.

[0012]

[0012] Referring to FIGS. 1 to 2, in some embodiments of the present application, the battery system 1000 includes a housing 1, and a receiving cavity 101 is formed in the housing 1. The receiving cavity 101 is configured to receive the battery module 2. Here, the battery module 2 includes a plurality of battery cells 21 stacked and installed. The plurality of battery cells 21 may be stacked and installed along the second direction Y, or may be stacked and installed along the third direction X. In an embodiment of the present application, the plurality of battery cells 21 are stacked and installed along the second direction Y.

[0013] Referring to FIGS. 3 to 4, the battery system 1000 further includes a mounting bracket 221. The mounting bracket 221 is provided at the opening position of the receiving cavity 101. The mounting bracket 221 includes a first bracket 2211 and a second bracket 2212 connected to each other. The first bracket 2211 extends toward the inner wall of the receiving cavity 101, and the second bracket 2212 is provided on the side of the first bracket 2211 away from the receiving cavity 101 and extends along the direction away from the receiving cavity 101. Here, the mounting bracket 221 is a part of the integrated busbar 22, and the integrated busbar 22 can realize high-voltage series-parallel connection for the plurality of battery cells 21 in the battery module 2, temperature sampling for the battery cells 21, voltage sampling for the battery cells 21, and overcurrent fuse function.

[0014] Referring to FIG. 5, the housing 1 forms the inner wall of the accommodation cavity 101, and the first bracket 2211 and the second bracket 2212 form a seal groove 3. The battery system 1000 further includes a first adhesive 4 and a cover 5. The first adhesive 4 is provided in the seal groove 3, and the cover 5 is fixed to one end of the housing 1 and at least partially connected to the first adhesive 4, that is, the mounting bracket 221 mounted in the accommodation cavity 101 and the inner wall of the housing 1 define the seal groove 3 therebetween. Since the first adhesive 4 is provided in the seal groove 3, when the cover 5 is attached to the housing 1, the cover 5 is connected to the first adhesive 4 to achieve the seal between the housing 1 and the cover 5.

[0015] In the technical solution of the present application, since the mounting bracket 221 is mounted in the accommodation cavity 101, the seal groove 3 is formed by being surrounded by the first bracket 2211 and the second bracket 2212 of the mounting bracket 221 and the inner wall of the housing 1, that is, the combination of different components (the mounting bracket 221 and the housing 1) forms the seal groove 3, effectively utilizing the space of the accommodation cavity 101 inside the housing 1, eliminating the need to provide another seal groove 3 for sealing between the housing 1 and the cover 5 on the housing 1 or other components, thereby effectively reducing the size of the entire battery system 1000.

[0016] In some embodiments of the present application, the accommodation cavity 101 is installed to extend along the first direction Z. Moreover, the second bracket 2212 is installed to extend along the first direction Z, and the inner wall of the accommodation cavity 101 protrudes from the first bracket 2211 in the first direction Z. Thus, the portion of the accommodation cavity 101 protruding from the first bracket 2211 in the first direction Z is installed opposite to the second bracket 2212. That is, the inner wall of the accommodation cavity 101, the first bracket 2211, and the second bracket 2212 can form a seal groove 3 with a U-shaped cross-section.

[0017] For the sake of understanding, it is sufficient to ensure that the peripheral edge of the first bracket 2211 extends towards and approaches the inner wall of the accommodation cavity 101 so that the first bracket 2211 extends towards the inner wall of the accommodation cavity 101 and contacts the inner wall of the accommodation cavity 101. In an embodiment of the present application, the first bracket 2211 is installed to extend in a plane perpendicular to the first direction Z.

[0018] Since the seal groove 3 is formed by the mounting bracket 221 and the inner wall of the housing 1, in order to prevent the first adhesive 4 located in the seal groove 3 from overflowing into the battery module 2 from the gap between the mounting bracket 221 and the inner wall of the housing 1, in some embodiments of the present application as shown in FIGS. 6 to 8, the housing 1 includes a first sub - part 11 and a second sub - part 12 that are connected in sequence in the first direction Z. The first sub - part 11 includes a first sub - segment 111, the second sub - part 12 includes a second sub - segment 121. The first sub - segment 111 and the second sub - segment 121 are connected to each other. The wall thickness of the first sub - segment 111 is smaller than the wall thickness of the second sub - segment 121, and a stepped surface 6 is formed at the connection portion between the first sub - segment 111 and the second sub - segment 121. Here, the stepped surface 6 abuts against the side of the first bracket 2211 away from the second bracket 2212 in the first direction Z.

[0019] That is, in this embodiment, when the mounting bracket 221 is installed inside the accommodation cavity 101, the side of the first bracket 2211 away from the second bracket 2212 in the first direction Z abuts against the stepped surface 6. Thereby, the stepped surface 6 can limit the movement of the mounting bracket 221 towards the battery module 2 located in the accommodation cavity 101. At the same time, when the side of the first bracket 2211 away from the second bracket 2212 in the first direction Z abuts against the stepped surface 6, it restricts the overflow of the first adhesive 4 into the battery module 2. Referring to FIG. 8, the B region surrounded by the dotted line in FIG. 8 is the first sub - part 11, and the C region is the second sub - part 12.

[0020] Since the stepped surface 6 is formed by portions of the housing 1 having different wall thicknesses, in the embodiment of the present application, it is sufficient to limit the wall thickness of the first sub-segment 111 at the connection portion between the first sub-part 11 and the second sub-part 12 to be smaller than the wall thickness of the second sub-segment 121, without restricting the wall thickness of the portion of the first sub-part 11 where the first sub-segment 111 is not formed. The wall thickness of the portion of the first sub-part 11 where the first sub-segment 111 is not formed may be greater than, equal to, or smaller than the wall thickness of the first sub-segment 111, as long as it does not affect the assembly of the mounting bracket 221. Similarly, the wall thickness of the portion of the second sub-part 12 where the second sub-segment 121 is not formed is not restricted, and the wall thickness of the portion of the second sub-part 12 where the second sub-segment 121 is not formed may be greater than, equal to, or smaller than the wall thickness of the second sub-segment 121.

[0021] Note that since there is an assembly gap between the mounting bracket 221 and the housing 1, when the mounting bracket 221 is attached to the housing 1, the first bracket 2211 has a certain gap from the inner wall of the housing 1 in a plane perpendicular to the first direction Z, and there is also a certain gap between the side away from the second bracket 2212 in the first direction Z and the stepped surface 6. On the other hand, since the first adhesive 4 has a certain viscosity, it cannot pass through the gap between the first bracket 2211 and the inner wall of the housing 1 and the gap between the first bracket 2211 and the stepped surface 6, thereby avoiding the overflow of the first adhesive 4 into the battery module 2.

[0022] Referring to FIGS. 5 and 9, in some embodiments of the present application, the cover 5 includes a cover body 51 and a convex portion 52. The side of the cover body 51 close to the housing 1 is in contact with the housing 1. The convex portion 52 is provided on the side of the cover body 51 close to the housing 1 and extends into the seal groove 3. At least a part of the convex portion 52 is fitted into the first adhesive 4. By fitting the convex portion 52 into the first adhesive 4, when fixing the housing 1 and the cover 5, the contact area between the cover 5 and the first adhesive 4 is increased, thereby improving the sealing performance of the battery system 1000.

[0023] Referring to FIGS. 8, 10, and 11, in some embodiments of the present application, the accommodation cavity 101 includes a first sub-cavity 1011 and a second sub-cavity 1012 spaced apart from each other. The battery module 2 is mounted in the first sub-cavity 1011. The battery system 1000 further includes a battery management system 7. The battery management system 7 includes a main body portion 71 and at least one first input portion 72 connected to the main body portion 71. The main body portion 71 is mounted in the second sub-cavity 1012, and the first input portion 72 is further connected to the battery module 2. That is, in this embodiment, the accommodation cavity 101 is partitioned into a first sub-cavity 1011 and a second sub-cavity 1012 to complete the installation of the battery module 2 and the battery management system 7 respectively. In an embodiment of the present application, by directly welding the first input portion 72 to the terminal post 211 of the corresponding battery cell 21 in the battery module 2, there is no need to use bolts or nuts for connecting the first input portion 72 and the terminal post 211 of the battery cell 21. As a result, the installation requirement for the space in the housing 1 related to the battery management system 7 is reduced, and the size of the battery system 1000 is reduced.

[0024] In an embodiment of the present application, the first sub-cavity 1011 and the second sub-cavity 1012 are spaced apart from each other in the third direction X.

[0025] Here, the battery management system 7 and the battery module 2 are electrically connected. In an embodiment of the present application, the battery system 1000 further includes a plurality of busbars 223, and the busbars 223 are also part of the integrated busbar 22. Referring to FIGS. 2 and 3, each of the plurality of busbars 223 is connected to the electrode posts 211 of two adjacent battery cells 21, so that the plurality of battery cells 21 in the battery module 2 are electrically connected. On the other hand, the battery management system 7 further includes a first input unit 72. By connecting the first input unit 72 to the electrode post 211 of one battery cell 21, the electrical connection between the battery management system 7 and the battery module 2 is realized. Since the entire battery module 2 has a positive output terminal and a negative output terminal, two first input units 72 are provided in the battery management system 7, whereby the electrode posts 211 of different battery cells 21, that is, the positive output terminal and the negative output terminal of the entire battery module 2 are respectively connected. In an embodiment of the present application, the two first input units 72 are installed at intervals in the second direction Y and are both connected to the main body 71.

[0026] Referring to FIGS. 10 and 12, the battery system 1000 further includes a position limiting member 8, which is provided on the inner wall of the second sub-cavity 1012 and includes two position limiting portions 81. The two position limiting portions 81 are spaced apart from each other to form a position limiting groove 9, and the position limiting groove 9 communicates with the second sub-cavity 1012. At least a part of the main body portion 71 is provided in the position limiting groove 9. That is, in this embodiment, the position limiting groove 9 realizes the position limiting and mounting of the main body portion 71 in the second sub-cavity 1012, that is, when the main body portion 71 is mounted in the second sub-cavity 1012, the position limiting groove 9 snaps the main body portion 71. In an embodiment of the present application, since the main body portion 71 extends along a plane where the first direction Z and the second direction Y are located, the position limiting member 8 is mounted on one inner wall of the housing 1 in the second direction Y, and the two position limiting portions 81 are spaced apart from each other in the third direction X to form the position limiting groove 9. When the main body portion 71 is fitted into the position limiting groove 9, the two position limiting portions 81 can realize the position limiting of the main body portion 71 in the third direction X, and the two opposite inner walls of the housing 1 in the second direction Y can realize the position limiting of the main body portion 71 in the second direction Y.

[0027] As can be understood, the main body portion 71 extends along a plane where the first direction Z and the second direction Y are located, and the second direction Y is the stacking direction of the plurality of battery cells 21. Such an installation reduces the size of the housing 1 in the third direction X, and while achieving the stacked installation of the plurality of battery cells 21, it does not increase the size of the housing 1 in the second direction Y, thereby effectively meeting the design requirement of reducing the size of the battery system 1000.

[0028] In order to improve the stability of the main body 71 fixed in the second sub-cavity 1012, in some embodiments of the present application, at least one position limiting portion 81 is further provided with an adhesive injection groove 10, and the adhesive injection groove 10 communicates with the position limiting groove 9. The battery system 1000 further includes a second adhesive 13, and the second adhesive 13 is located in the position limiting groove 9 and is connected to the main body 71 located in the position limiting groove 9. That is, in this embodiment, the second adhesive 13 located in the position limiting groove 9 adheres the position limiting portion 81 and the main body 71, realizes the relative fixation between the position limiting portion 81 and the main body 71, and thus improves the stability of the main body 71 fixed in the second sub-cavity 1012.

[0029] In some embodiments of the present application, two position limiting members 8 are provided. The main body 71 is located between the two position limiting members 8. Here, in order to prevent the main body 71 from loosening and falling off when fixed in the second sub-cavity 1012, the two position limiting members 8 are provided to simultaneously fix the opposite sides of the main body 71. On the other hand, since the position limiting member 8 is provided on one inner wall of the housing 1 in the second direction Y, the two position limiting members 8 are installed opposite to each other along the second direction Y. Similarly, the position limiting portion 81 is provided with an adhesive injection groove 10, the second adhesive 13 is installed in the adhesive injection groove 10, and the position limiting portion 81 of the two position limiting members 8 installed opposite to each other along the second direction Y is provided with an adhesive injection groove 10, and the adhesive injection groove 10 is filled with the second adhesive 13, thereby improving the stability of the fixation of the main body 71.

[0030] As can be understood, the configuration means of snapping and position limiting the main body 71 by the position limiting member 8 and fixing it in the second sub-cavity 1012 by the second adhesive 13 reduces the mounting requirement for the space in the housing 1 related to the battery management system 7 compared with the means of fixing the main body 71 using bolts or nuts in the prior art, and reduces the size of the battery system 1000.

[0031] Note that both the position limiting groove 9 and the adhesive injection groove 10 are installed to extend along the first direction Z to facilitate the installation of the main body 71 and the filling of the second adhesive 13.

[0032] Referring to FIGS. 2, 3, and 5, in some embodiments of the present application, the battery management system 7 further includes a first output portion 73. The battery system 1000 further includes a second input portion 222 and a second output portion 14. The second input portion 222 is provided on the mounting bracket 221, and the second output portion 14 is provided on the cover 5. Here, the first output portion 73 is connected to the second input portion 222, the second input portion 222 is connected to the second output portion 14, and the second input portion 222 is a part of the integrated bus bar 22. In this embodiment, the output path of the battery system 1000 is as follows. The current is output from the battery module 2 to the first input portion 72, output to the second input portion 222 via the main body 71 and the first output portion 73, and then transmitted to the second output portion 14 on the cover 5 and output.

[0033] Referring to FIG. 9, the cover 5 is further provided with output terminals 26. The output terminals 26 are connected to the second output portion 14 to transmit the current of the battery system 1000 to in-vehicle devices. Here, two output terminals 26 are similarly provided, one being the positive output terminal and the other being the negative output terminal. Therefore, the first input portion 72, the first output portion 73, the second input portion 222, and the second output portion 14 that are connected to each other are all provided in two, and are respectively connected to the positive output terminal and the negative output terminal.

[0034] Note that a communication connector 24 is further attached to the cover 5. The communication connector 24 is a communication connector connection port between the battery system 1000 and the inside of the vehicle.

[0035] Referring to FIG. 5, on the side of the cover 5 away from the housing 1, a mounting groove 15 is formed. The cover 5 is provided with at least one guide hole 16 that communicates the mounting groove 15 with the accommodation cavity 101. The battery system 1000 further includes a connection part 17, which is provided in the mounting groove 15 and connected to the second output part 14. At least a part of the connection part 17 extends from the guide hole 16 into the accommodation cavity 101 and is connected to the second input part 222. That is, in this embodiment, the second output part 14 is provided on the cover 5, and the second input part 222 is provided on the mounting bracket 221 and located inside the housing 1. Therefore, when assembling the cover 5 and the housing 1, in order to connect the second input part 222 and the second output part 14, the connection part 17 is provided in the mounting groove 15, and the connection part 17 passes through the guide hole 16 to connect the second input part 222 and the second output part 14. In an embodiment of the present application, the connection part 17 is a combination of a bolt and a nut. In addition, in order to protect the connection part 17 in the mounting groove 15, the cover 5 is further provided with a protective cover 23 covering the notch position of the mounting groove 15.

[0036] Referring to FIGS. 13 to 14, the battery system 1000 further includes a third adhesive 18, which is located between at least a part of the inner wall of the housing 1 forming the accommodation cavity 101 and the plurality of battery cells 21. That is, in this embodiment, by installing the third adhesive 18, the fixing of the battery cells 21 in the accommodation cavity 101 is realized. Here, there is no limitation on the application position of the third adhesive 18. In one embodiment, the third adhesive 18 may be installed on all the inner walls of the housing 1 adjacent to the plurality of battery cells 21. In another embodiment, the third adhesive 18 may be installed on a part of the inner walls of the housing 1 adjacent to the plurality of battery cells 21.

[0037] In one embodiment of the present application, the third adhesive 18 may be partially applied to the bottom of the accommodation cavity 101, thereby realizing partial fixation between the battery module 2 and the housing 1 when the battery module 2 is mounted in the accommodation cavity 101. Thereafter, the third adhesive 18 is installed on all the inner walls of the housing 1 adjacent to the plurality of battery cells 21 in the battery module 2.

[0038] The battery system 1000 further includes at least one position-limiting rib 19. The position-limiting rib 19 is provided on the inner wall of the housing 1 forming the accommodation cavity 101, and the position-limiting rib 19 limits the positions of the plurality of battery cells 21. Here, when the plurality of battery cells 21 are installed in the housing 1, the position-limiting rib 19 plays a role in limiting the positions of the plurality of battery cells 21 and can improve the structural strength of the entire housing 1. Similarly, when the plurality of battery cells 21 are mounted in the accommodation cavity 101, the position-limiting rib 19 further provides a sufficient space for filling the third adhesive 18 with a gap between the plurality of battery cells 21 and the inner wall of the housing 1, and ensures that the third adhesive 18 located at the periphery of the plurality of battery cells 21 has a sufficient adhesive thickness. Referring to FIG. 13, the position-limiting rib 19 is located on two opposite inner walls of the housing 1 in the second direction Y and is installed to extend along the first direction Z. In addition, the position-limiting rib 19 is further located on the bottom wall of the accommodation cavity 101 in the first direction Z and extends along the second direction Y.

[0039] Referring to FIG. 14, in some embodiments of the present application, the battery system 1000 further includes at least one buffer member 20. The buffer member 20 is provided between two adjacent battery cells 21. Here, the buffer member 20 has a certain elastic deformation performance, thereby providing a certain pre-tightening force to two adjacent battery cells 21 after the battery module 2 is mounted in the housing 1, and thus ensuring the recycling performance of the battery cell 21.

[0040] Note that since the battery cell 21 extends and is installed along the plane where the first direction Z and the third direction X are located, and the buffer member 20 is located between two adjacent battery cells 21, that is, the buffer member 20 is located on one side surface of the battery cell 21 in the second direction Y, and both opposite sides of the battery cell 21 in the second direction Y are the expansion regions of the battery cell 21. By the buffer member 20 being located in the expansion region, it is possible to avoid the third adhesive 18 from being adhered to the expansion region of the battery cell 21, and thus, when the battery cell 21 expands, the force generated can be prevented from acting on the housing 1 by the third adhesive 18 and causing the housing 1 to crack.

[0041] Similarly, the buffer member 20 further serves as a buffer when the battery cell 21 expands. In one embodiment of the present application, the buffer member 20 is a buffer foam.

[0042] In some embodiments of the present application, a buffer member 20 is also provided between at least one battery cell 21 and the inner wall of the housing 1 that forms the accommodation cavity 101 and is close to the inner wall of the housing 1. That is, a buffer member 20 is provided between the battery cell 21 and the inner wall of the housing 1 so that the expansion region of the battery cell 21 and the housing 1 are not directly adhered by the third adhesive 18.

[0043] Referring to FIG. 11, the battery system 1000 further includes a fixing member 25, and the fixing member 25 is provided surrounding a plurality of battery cells 21. By providing the fixing member 25, the plurality of battery cells 21 in the battery module 2 are fixed, facilitating the attachment of the plurality of battery cells 21 to the accommodation cavity 101. In one embodiment of the present application, the fixing member 25 is a glass fiber cloth.

Description of Reference Numerals

[0044] 1000: Battery system 1: Housing 101: Accommodation cavity 2: Battery module 21: Battery cell 22: Integrated bus bar 221: Mounting Bracket 2211: First Bracket 2212: Second Bracket 3: Seal Groove 4: First Adhesive 5: Cover 11: First Sub - part 12: Second Sub - part 111: First Sub - segment 121: Second Sub - segment 6: Step Surface 51: Cover Body 52: Convex Portion 1011: First Sub - cavity 1012: Second Sub - cavity 7: Battery Management System 71: Main Body Part 72: First Input Part 8: Position Limiting Member 81: Position Limiting Part 9: Position Limiting Groove 10: Adhesive Injection Groove 13: Second Adhesive 73: First Output Part 222: Second Input Part 14: Second Output Part 15: Mounting Groove 16: Guide Hole 17: Connection Part 18: Third Adhesive 19: Position Limiting Rib 20: Buffer Member 223: Busbar 23: Protection Cover 24: Communication Connector 211: Terminal Post 25: Fixing Member 26: Output Terminal

Claims

Claim 1 A housing (1), wherein a receiving cavity (101) is formed in the housing (1), and the receiving cavity (101) is configured to house a battery module (2), the housing (1) and, An attachment bracket (221) provided at an opening position of the receiving cavity (101) and including a first bracket (2211) and a second bracket (2212) connected to each other, wherein the first bracket (2211) extends toward an inner wall of the receiving cavity (101), and the second bracket (2212) is provided on a side of the first bracket (2211) away from the receiving cavity (101) and extends along a direction away from the receiving cavity (101), the housing (1) forms an inner wall of the receiving cavity (101), and the first bracket (2211) and the second bracket (2212) form a single seal groove (3), the attachment bracket (221); A first adhesive (4) installed in the seal groove (3); A cover (5) fixed to one end of the housing (1) and at least partially connected to the first adhesive (4), comprising, A battery system. Claim 2 The receiving cavity (101) is installed to extend along a first direction, The housing (1) includes a first sub - part (11) and a second sub - part (12) connected in sequence in the first direction, the first sub - part (11) includes a first sub - segment (111), the second sub - part (12) includes a second sub - segment (121), the first sub - segment (111) and the second sub - segment (121) are connected to each other, a wall thickness of the first sub - segment (111) is smaller than a wall thickness of the second sub - segment (121), and a stepped surface (6) is formed at a connection portion between the first sub - segment (111) and the second sub - segment (121), The stepped surface (6) abuts against a side of the first bracket (2211) away from the second bracket (2212) in the first direction, The battery system according to Claim 1. Claim 3 The cover (5) includes a cover body (51) and a convex portion (52). The side of the cover body (51) close to the housing (1) contacts the housing (1). The convex portion (52) is provided on the side of the cover body (51) close to the housing (1) and extends into the seal groove (3). At least a part of the convex portion (52) is fitted into the first adhesive (4). The battery system according to claim 1.

4. The accommodation cavity (101) includes a first sub-cavity (1011) and a second sub-cavity (1012) spaced apart from each other. The battery module (2) is mounted in the first sub-cavity (1011). The battery system (1000) further includes a battery management system (7). The battery management system (7) includes a main body portion (71) and a first input portion (72) connected to the main body portion (71). The main body portion (71) is mounted in the second sub-cavity (1012), and the first input portion (72) is further connected to the battery module (2). The battery system according to claim 1.

5. The battery system (1000) further includes a position limiting member (8). The position limiting member (8) is provided on the inner wall of the second sub-cavity (1012) and includes two position limiting portions (81). The two position limiting portions (81) form a position limiting groove (9) with a space therebetween. The position limiting groove (9) communicates with the second sub-cavity (1012). At least a part of the main body portion (71) is provided in the position limiting groove (9). The battery system according to claim 4.

6. At least one of the position limiting portions (81) is further provided with an adhesive injection groove (10). The adhesive injection groove (10) communicates with the position limiting groove (9). The battery system (1000) further includes a second adhesive (13). The second adhesive (13) is located in the position limiting groove (9) and is connected to the main body portion (71) located in the position limiting groove (9). The battery system according to claim 5.

7. Two of the position limiting members (8) are installed, and the main body portion (71) is located between the two position limiting members (8). The battery system according to claim 5.

8. The battery management system (7) further includes a first output portion (73). The battery system (1000) further includes a second input portion (222) and a second output portion (14). The second input portion (222) is provided on the mounting bracket (221), and the second output portion (14) is provided on the cover (5). The first output portion (73) is connected to the second input portion (222), and the second input portion (222) is connected to the second output portion (14). The battery system according to claim 4.

9. On the side of the cover (5) away from the housing (1), a mounting groove (15) is formed. The cover (5) is provided with at least one guide hole (16) that communicates the mounting groove (15) with the accommodation cavity (101). The battery system (1000) further includes a connection portion (17). The connection portion (17) is provided in the mounting groove (15) and is connected to the second output portion (14). At least a part of the connection portion (17) extends from the guide hole (16) into the accommodation cavity (101) and is connected to the second input portion (222). The battery system according to claim 8.

10. The battery module (2) includes a plurality of battery cells (21) installed in a stacked manner. The battery system (1000) further includes a third adhesive (18). The third adhesive (18) is located between at least a part of the inner wall of the housing (1) that forms the accommodation cavity (101) and the plurality of battery cells (21). The battery system according to any one of claims 1 to 9.

11. The battery system (1000) further includes at least one position limiting rib (19). The position limiting rib (19) is provided on the inner wall of the housing (1) that forms the accommodation cavity (101), and the position limiting rib (19) limits the positions of the plurality of battery cells (21). The battery system according to claim 10.

12. The battery system (1000) further includes at least one buffer member (20). The buffer member (20) is provided between two adjacent battery cells (21). The battery system according to claim 10.

13. The buffer member (20) is also provided between at least one of the battery cells (21) adjacent to the inner wall of the housing (1) that forms the accommodation cavity (101) and the inner wall of the housing (1). The battery system according to claim 12.

14. The battery system (1000) further includes a fixing member (25), and the fixing member (25) is provided to surround a plurality of the battery cells (21). The battery system according to claim 10.

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