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, specifically to battery systems.

[0002] This application claims the priority of a Chinese patent application with 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 electric vehicles 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 internal space of an electric vehicle is limited, it is necessary to perform a reduction adjustment on 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 a housing, in which an accommodation cavity is formed, and the accommodation cavity is configured to accommodate a battery module, and A mounting bracket (221) provided at the opening of the housing 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 housing cavity, and the second bracket is provided on the side of the first bracket away from the housing cavity and extends along the direction away from the housing cavity, the housing forms the inner wall of the housing cavity, and the first bracket and the second bracket form a single seal groove. The first adhesive is placed in the seal groove, The system includes a cover fixed to one end of the housing, with at least a portion of it connected to a first adhesive. [Effects of the Invention]

[0006] In the proposed technology, since the mounting bracket is installed within the housing cavity, the seal groove is formed by being surrounded by the first bracket and the second bracket of the mounting bracket and the inner wall of the housing. In other words, the combination of different components (mounting bracket and housing) forms the seal groove, which effectively utilizes the space of the housing cavity inside the housing. This eliminates the need to provide a separate seal groove for sealing between the housing and the cover in the housing or other components, thereby effectively reducing the overall size of the battery system. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic three-dimensional diagram showing a battery system provided in an embodiment of the present invention. [Figure 2] This is a schematic three-dimensional diagram showing a case in which a mounting bracket is not installed inside the housing provided in the embodiment of the present application. [Figure 3] This is a schematic three-dimensional diagram showing a battery system provided in an embodiment of the present application that does not have a cover. [Figure 4] This is a schematic three-dimensional view showing a mounting bracket provided in an embodiment of the present application. [Figure 5] This is a schematic cross-sectional view showing a battery system provided in an embodiment of the present application. [Figure 6] This is an enlarged schematic diagram showing part A of Figure 5. [Figure 7] This is an enlarged schematic diagram showing the case where the first adhesive is not provided in the seal groove in section A of Figure 5. [Figure 8] This is a schematic cross-sectional view showing the housing provided in the embodiment of the present application. [Figure 9] This is a schematic three-dimensional view showing the cover provided in the embodiment of the present application. [Figure 10] This is a schematic three-dimensional diagram showing, from a different viewing angle, the case in which the mounting bracket is not installed inside the housing provided in the embodiment of the present application. [Figure 11] This is a schematic diagram showing an assembly of a battery module and a battery management system provided in an embodiment of the present invention. [Figure 12] This is a schematic diagram showing an assembly in which a battery module is installed inside the housing provided in the embodiment of the present invention. [Figure 13] This is a schematic three-dimensional view showing the housing provided in the embodiment of the present application. [Figure 14] This is a schematic cross-sectional view showing the housing provided in the embodiment of the present application. [Modes for carrying out the invention]

[0008] In the description of this application, unless otherwise explicitly stated and limited, the terms “connected to one another,” “connected,” and “fixed” shall be understood in a broad sense. For example, a fixed connection may be a detachable connection, a one-piece connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, an internal communication between two elements, or an interaction between two elements. Those skilled in the art may understand the specific meaning of the above terms in this application in particular contexts.

[0009] In this application, unless otherwise explicitly stated or limited, the presence of a first feature "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or it may include the first feature not being in direct contact with the second feature but being in contact with it by other features between them. Furthermore, the presence of a first feature "above," "above," or "on the top surface" of a second feature indicates that the first feature is directly above or diagonally above the second feature, or that the first feature is higher than the second feature in the horizontal direction. The presence of a first feature "below," "below," or "on the bottom surface" of a second feature indicates that the first feature is directly below or diagonally below the second feature, or that the first feature is lower than the second feature in the horizontal direction.

[0010] In the description of this embodiment, terms relating to orientation or positional relationships, such as "up," "down," "left," "right," "front," and "back," are based on the orientation or positional relationships shown in the drawings and are for the purpose of simplifying explanation and operation. They do not indicate or suggest any device or element having a specific orientation, configuration, or operation, and should not be interpreted as limiting this application. Furthermore, "first" and "second" are used for distinction in the description and do not have any special meaning.

[0011] This application provides a battery system, and Figures 1 to 14 show some embodiments of this application. Here, as shown in Figures 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, second, and third directions intersect each other. The angle between any two of the first, second, and third directions may be 80°, 85°, 90°, 95°, or 100°, and is not limited to these. In the following embodiments, the case where the angle between any two of the first, second, and third directions is 90° will be explained as an example, that is, several embodiments of this application will be interpreted and explained by establishing a three-dimensional Cartesian coordinate system using the first, second, and third directions. Note that the angle between any two of the first, second, and third directions being 90° is not a limitation to the solutions in the following embodiments of this application.

[0012] Referring to Figures 1 and 2, in some embodiments of the present application, the battery system 1000 includes a housing 1, the housing 1 having a housing cavity 101 formed therein, the housing cavity 101 configured to house a battery module 2, where the battery module 2 includes a plurality of stacked battery cells 21, which may be stacked along a second direction Y or stacked along a third direction X. In one embodiment of the present application, the plurality of battery cells 21 are stacked along the second direction Y.

[0013] Referring to Figures 3 and 4, the battery system 1000 further includes a mounting bracket 221, which is provided at the opening of the housing cavity 101, and the mounting bracket 221 includes a first bracket 2211 and a second bracket 2212 connected to each other, the first bracket 2211 extending toward the inner wall of the housing cavity 101, and the second bracket 2212 provided on the side of the first bracket 2211 away from the housing cavity 101 and extending along the direction away from the housing cavity 101. Here, the mounting bracket 221 is part of an integrated busbar 22, which can provide high-voltage series-parallel connections for multiple battery cells 21 in the battery module 2, as well as temperature sampling for the battery cells 21, voltage sampling for the battery cells 21, and an 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. The cover 5 is fixed to one end of the housing 1 and at least a part of it is 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 partition the seal groove 3. 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, the size of the entire battery system 1000 can be effectively reduced.

[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 part of the accommodation cavity 101 that protrudes 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] To make it understandable, it is sufficient that the first bracket 2211 extends toward the inner wall of the housing cavity 101, provided that the periphery of the first bracket 2211 extends toward and approaches the inner wall of the housing cavity 101 and contacts the inner wall of the housing cavity 101. In one embodiment of the present invention, the first bracket 2211 is installed extending in a plane perpendicular to the first direction Z.

[0018] Furthermore, 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 through the gap between the mounting bracket 221 and the inner wall of the housing 1, as shown in Figures 6 to 8, in some embodiments of the present invention, the housing 1 includes a first sub-part 11 and a second sub-part 12 connected in order in a 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] In other words, in this embodiment, when the mounting bracket 221 is installed inside the housing 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 restricting the mounting bracket 221 to move toward the battery module 2 located inside the housing cavity 101. At the same time, the abutment of the side of the first bracket 2211 away from the second bracket 2212 in the first direction Z against the stepped surface 6 restricts the first adhesive 4 from overflowing into the battery module 2. Referring to Figure 8, the area B enclosed by the dotted line in Figure 8 is the first sub-part 11, and the area C 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 invention, it is sufficient to limit the wall thickness of the first subsegment 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 subsegment 121. There is no restriction on the wall thickness of the portion of the first sub-part 11 in which the first subsegment 111 is not formed. The wall thickness of the portion of the first sub-part 11 in which the first subsegment 111 is not formed may be greater than the wall thickness of the first subsegment 111, equal to the wall thickness of the first subsegment 111, or less than the wall thickness of the first subsegment 111, as long as it does not affect the assembly of the mounting bracket 221. Similarly, there is no restriction on the wall thickness of the portion of the second sub-part 12 in which the second sub-segment 121 is not formed. The wall thickness of the portion of the second sub-part 12 in which the second sub-segment 121 is not formed may be greater than the wall thickness of the second sub-segment 121, equal to the wall thickness of the second sub-segment 121, or less than the wall thickness of the second sub-segment 121.

[0021] Furthermore, 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 amount of gap between it and the inner wall of the housing 1 in a plane perpendicular to the first direction Z, and also has a certain amount of gap between it and the stepped surface 6 on the side away from the second bracket 2212 in the first direction Z. On the other hand, the first adhesive 4 has a certain degree of viscosity, so 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 preventing the first adhesive 4 from overflowing into the battery module 2.

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

[0023] Referring to Figures 8, 10, and 11, in some embodiments of the present application, the housing cavity 101 includes a first sub-cavity 1011 and a second sub-cavity 1012 spaced apart from each other, and the battery module 2 is mounted in the first sub-cavity 1011. The battery system 1000 further includes a battery management system 7, which includes a main body 71 and at least one first input unit 72 connected to the main body 71, the main body 71 being mounted in the second sub-cavity 1012, and the first input unit 72 being further connected to the battery module 2. That is, in this embodiment, the housing cavity 101 is divided into the first sub-cavity 1011 and the second sub-cavity 1012 to complete the mounting of the battery module 2 and the battery management system 7, respectively. In one embodiment of the present invention, the first input unit 72 is directly welded to the pole 211 of the corresponding battery cell 21 in the battery module 2, eliminating the need to use bolts or nuts to connect the first input unit 72 to the pole 211 of the battery cell 21. This reduces the mounting requirements for the space within the housing 1 related to the battery management system 7, thereby reducing the size of the battery system 1000.

[0024] In one embodiment of the present invention, the first subcavity 1011 and the second subcavity 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 one embodiment of the present invention, 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 Figures 2 and 3, each of the plurality of busbars 223 is connected to the poles 211 of two adjacent battery cells 21, thereby electrically connecting the plurality of battery cells 21 in the battery module 2. On the other hand, the battery management system 7 further includes a first input unit 72, and the first input unit 72 is connected to the poles 211 of one battery cell 21, thereby achieving the electrical connection between the battery management system 7 and the battery module 2. Since the entire battery module 2 has a positive output terminal and a negative output terminal, the battery management system 7 is provided with two first input units 72, which connect the poles 211 of different battery cells 21, i.e., the positive output terminal and the negative output terminal of the entire battery module 2, respectively. In one embodiment of the present invention, the two first input units 72 are spaced apart in the second direction Y and are both connected to the main body unit 71.

[0026] Referring to Figures 10 and 12, the battery system 1000 further includes a position limiting member 8, which is provided on the inner wall of the second subcavity 1012 and includes two position limiting portions 81. The two position limiting portions 81 are spaced apart from each other and form a position limiting groove 9, which communicates with the second subcavity 1012. At least a portion of the main body 71 is provided within the position limiting groove 9. That is, in this embodiment, the position limiting groove 9 enables the position limiting mounting of the main body 71 within the second subcavity 1012, i.e., when the main body 71 is mounted within the second subcavity 1012, the position limiting groove 9 snaps the main body 71 into place. In one embodiment of the present invention, since the main body portion 71 extends along a plane in which the first direction Z and the second direction Y are located, the position limiting member 8 is attached to 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 a 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 achieve position limiting of the main body portion 71 in the third direction X, and the two opposing inner walls of the housing 1 in the second direction Y can achieve position limiting of the main body portion 71 in the second direction Y.

[0027] To make it clear, the main body 71 extends along the plane in which the first direction Z and the second direction Y are located, and the second direction Y is the stacking direction of the multiple battery cells 21. This configuration reduces the size of the housing 1 in the third direction X, while also achieving the stacking of multiple battery cells 21, without increasing the size of the housing 1 in the second direction Y. This effectively meets the design requirement to reduce the size of the battery system 1000.

[0028] To improve the stability of the main body 71 fixed within the second subcavity 1012, in some embodiments of the present invention, at least one position limiting portion 81 is further provided with an adhesive injection groove 10, the adhesive injection groove 10 communicating with the position limiting groove 9. The battery system 1000 further includes a second adhesive 13, which is located within the position limiting groove 9 and connected to the main body 71 located within the position limiting groove 9. That is, in this embodiment, the second adhesive 13 located within the position limiting groove 9 adheres the position limiting portion 81 and the main body 71, thereby achieving relative fixation between the position limiting portion 81 and the main body 71, and consequently improving the stability of the main body 71 fixed within the second subcavity 1012.

[0029] In some embodiments of the present invention, two position limiting members 8 are installed. The main body 71 is located between the two position limiting members 8. Here, the two position limiting members 8 are provided to simultaneously fix the main body 71 on opposing sides so that it does not loosen and fall out when the main body 71 is fixed in the second subcavity 1012. On the other hand, since the position limiting members 8 are provided on one inner wall in the second direction Y of the housing 1, the two position limiting members 8 are installed facing each other along the second direction Y. Similarly, the position limiting portion 81 is provided with an adhesive injection groove 10, and the second adhesive 13 is installed in the adhesive injection groove 10. The position limiting portion 81 of the two position limiting members 8 installed facing each other along the second direction Y is provided with an adhesive injection groove 10, and the second adhesive 13 is filled in the adhesive injection groove 10, thereby improving the stability of the fixing of the main body 71.

[0030] To make it easier to understand, the configuration of snapping the main body 71 into position limiting member 8 and fixing it in the second subcavity 1012 with second adhesive 13 reduces the mounting requirements for the battery management system 7 within the housing 1, compared to the conventional method of fixing the main body 71 using bolts or nuts, thereby reducing the size of the battery system 1000.

[0031] Furthermore, both the position limiting groove 9 and the adhesive injection groove 10 are installed extending along the first direction Z, facilitating the installation of the main body 71 and the filling of the second adhesive 13.

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

[0033] Referring to Figure 9, the cover 5 is further provided with an output terminal 26, which is connected to the second output unit 14 to transmit the current from the battery system 1000 to the in-vehicle equipment. Here, there are two output terminals 26, one of which is the positive output terminal and the other is the negative output terminal. Therefore, the first input unit 72, the first output unit 73, the second input unit 222, and the second output unit 14, which are connected to each other, are all provided in pairs, each connecting the positive output terminal and the negative output terminal, respectively.

[0034] Furthermore, a communication connector 24 is attached to the cover 5, and the communication connector 24 is a communication connector connection port between the battery system 1000 and the interior of the vehicle.

[0035] Referring to Figure 5, the cover 5 has a mounting groove 15 formed on the side away from the housing 1, and the cover 5 is provided with at least one guide hole 16 that connects the mounting groove 15 to the housing 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 portion of the connection part 17 extends from the guide hole 16 into the housing cavity 101 and is connected to the second input part 222. That is, in this embodiment, the second output part 14 is provided in the cover 5, and the second input part 222 is provided in the mounting bracket 221 and located inside the housing 1. Therefore, when assembling the cover 5 and the housing 1, the connection part 17 is provided in the mounting groove 15 to connect the second input part 222 and the second output part 14, 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 one embodiment of the present invention, the connecting portion 17 is a combination of a bolt and a nut. In addition, to protect the connecting portion 17 within the mounting groove 15, the cover 5 is further covered by a protective cover 23 over the notched position of the mounting groove 15.

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

[0037] In one embodiment of the present invention, the third adhesive 18 may be partially applied to the bottom of the housing cavity 101, thereby enabling partial fixing of the battery module 2 and the housing 1 when the battery module 2 is installed in the housing cavity 101. Subsequently, the third adhesive 18 is applied to all the inner walls of the housing 1 adjacent to the multiple battery cells 21 in the battery module 2.

[0038] The battery system 1000 further includes at least one position-restricting rib 19, which is provided on the inner wall of the housing 1 forming the housing cavity 101, and the position-restricting rib 19 restricts the position of the plurality of battery cells 21. Here, the position-restricting rib 19 serves to restrict the position of the plurality of battery cells 21 when they are installed in the housing 1, and can also improve the overall structural strength of the housing 1. Similarly, when the plurality of battery cells 21 are installed in the housing cavity 101, the position-restricting rib 19 can further provide sufficient space for filling the third adhesive 18 by spacing the plurality of battery cells 21 between the plurality of battery cells 21 and the inner wall of the housing 1, and can ensure that the third adhesive 18 located around the periphery of the plurality of battery cells 21 has sufficient bonding thickness. Referring to Figure 13, the position-restricting rib 19 is located on two opposing inner walls of the housing 1 in a second direction Y and extends along a first direction Z. Furthermore, the position-restricting rib 19 is located on the bottom wall of the housing cavity 101 in the first direction Z and extends along the second direction Y.

[0039] Referring to Figure 14, in some embodiments of the present invention, the battery system 1000 further includes at least one buffer member 20, which is provided between two adjacent battery cells 21. Herein, the buffer member 20 has some degree of elastic deformation performance, thereby providing some pre-tightening force to the two adjacent battery cells 21 after the battery module 2 is installed in the housing 1, and thereby ensuring the recyclability of the battery cells 21.

[0040] Furthermore, since the battery cells 21 are installed extending along the plane in which 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 of the battery cell 21 in the second direction Y, and the battery cells 21 are in the expansion region on both opposing sides in the second direction Y. By having the buffer member 20 located in this expansion region, the third adhesive 18 is prevented from adhering to the expansion region of the battery cell 21, and consequently, the force generated when the battery cell 21 expands is prevented from acting on the housing 1 by the third adhesive 18, thereby preventing the housing 1 from cracking.

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

[0042] In some embodiments of the present invention, a buffer member 20 is also provided between at least one battery cell 21, which is close to the inner wall of the housing 1 forming the housing cavity 101, and 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 expanded region of the battery cell 21 and the housing 1 do not directly adhere to each other by the third adhesive 18.

[0043] Referring to Figure 11, the battery system 1000 further includes a fixing member 25, which surrounds a plurality of battery cells 21. The fixing member 25 is provided to fix the plurality of battery cells 21 in the battery module 2 and facilitate the installation of the plurality of battery cells 21 into the housing cavity 101. In one embodiment of the present invention, the fixing member 25 is a glass fiber cloth. [Explanation of symbols]

[0044] 1000: Battery System 1: Cabinet 101: Containment 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: Sub-section 1 12: Second Subsection 111: First subsegment 121: Second subsegment 6: Step surface 51: Cover body 52: Convex part 1011: First sub-cavity 1012: Second sub-cavity 7: Battery Management System 71: Main body 72: First Input Section 8: Position limiting member 81: Position restriction section 9: Position restriction groove 10: Groove for adhesive injection 13: Second adhesive 73: First Output Section 222: Second input section 14: Second Output Section 15: Mounting groove 16: Guide Hall 17: Connection part 18: Third adhesive 19: Positional restriction rib 20: Buffer component 223: Bus bar 23: Protective cover 24: Communication Connector 211: Polar pillar 25: Fixing member 26: Output terminal

Claims

1. A battery system (1000), A housing (1) is provided, wherein a housing cavity (101) is formed in the housing (1), and the housing cavity (101) is configured to house a battery module (2). Mounting bracket (221) provided at the opening of the housing cavity (101) and including a first bracket (2211) and a second bracket (2212) connected to each other, wherein the first bracket (2211) extends toward the inner wall of the housing cavity (101), and the second bracket (2212) is provided on the side of the first bracket (2211) away from the housing cavity (101) and extends along a direction away from the housing cavity (101), the housing (1) forms the inner wall of the housing cavity (101), and the first bracket (2211) and the second bracket (2212) form a single seal groove (3), The first adhesive (4) is installed in the seal groove (3), The housing (1) includes a cover (5) which is fixed to one end and at least a portion of which is connected to the first adhesive (4), The housing cavity (101) includes a first sub-cavity (1011) and a second sub-cavity (1012) spaced apart from each other, and 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 (71) and a first input unit (72) connected to the main body (71), the main body (71) is mounted in the second subcavity (1012), and the first input unit (72) is further connected to the battery module (2). The battery system (1000) further includes a position limiting member (8), which is provided on the inner wall of the second subcavity (1012) and includes two position limiting portions (81), the two position limiting portions (81) forming position limiting grooves (9) spaced apart from each other, and the position limiting grooves (9) communicating with the second subcavity (1012). At least a portion of the main body portion (71) is provided within the position limiting groove (9), At least one of the position limiting portions (81) is further provided with an adhesive injection groove (10), and the adhesive injection groove (10) is in communication with the position limiting groove (9), The battery system (1000) further includes a second adhesive (13), the second adhesive (13) is located within the position limiting groove (9) and is connected to the main body (71) located within the position limiting groove (9). Battery system.

2. The aforementioned housing cavity (101) is installed extending along the first direction, The housing (1) includes a first sub-part (11) and a second sub-part (12) connected in order 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, 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). The stepped surface (6) abuts against the side of the first bracket (2211) that is away from the second bracket (2212) in the first direction. The battery system according to claim 1.

3. The cover (5) includes a cover body (51) and a protrusion (52), the side of the cover body (51) closest to the housing (1) is in contact with the housing (1), the protrusion (52) is provided on the side of the cover body (51) closest to the housing (1) and extends into the seal groove (3), and at least a portion of the protrusion (52) is fitted into the first adhesive (4). The battery system according to claim 1.

4. Two position limiting members (8) are installed, and the main body (71) is located between the two position limiting members (8). The battery system according to claim 1.

5. The battery management system (7) further includes a first output unit (73), The battery system (1000) further includes a second input unit (222) and a second output unit (14), the second input unit (222) being provided on the mounting bracket (221), and the second output unit (14) being provided on the cover (5). The first output unit (73) is connected to the second input unit (222), and the second input unit (222) is connected to the second output unit (14). The battery system according to claim 1.

6. The cover (5) has a mounting groove (15) formed on the side away from the housing (1), and the cover (5) is provided with at least one guide hole (16) that connects the mounting groove (15) and the housing cavity (101). The battery system (1000) further includes a connection portion (17), the connection portion (17) being provided in the mounting groove (15) and connected to the second output portion (14), and at least a portion of the connection portion (17) extending from the guide hole (16) into the housing cavity (101) and connected to the second input portion (222). The battery system according to claim 5.

7. The battery module (2) includes a plurality of battery cells (21) that are stacked and installed, The battery system (1000) further comprises a third adhesive (18), the third adhesive (18) located between at least a portion of the inner wall of the housing (1) and the plurality of battery cells (21) that form the housing cavity (101), The battery system according to any one of claims 1 to 6.

8. The battery system (1000) further includes at least one position-restricting rib (19), the position-restricting rib (19) being provided on the inner wall of the housing (1) forming the housing cavity (101), and the position-restricting rib (19) restricting the positions of the plurality of battery cells (21). The battery system according to claim 7.

9. The battery system (1000) further includes at least one buffer member (20), the buffer member (20) being provided between two adjacent battery cells (21). The battery system according to claim 7.

10. The buffer member (20) is also provided between at least one of the battery cells (21) that is close to the inner wall of the housing (1) forming the housing cavity (101), and the inner wall of the housing (1). The battery system according to claim 9.

11. The battery system (1000) further includes a fixing member (25), the fixing member (25) is provided surrounding a plurality of the battery cells (21). The battery system according to claim 7.

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