Battery system

Abstract

A battery system (1000), the battery system (1000) comprising a case body (1), a mounting support (221), a first adhesive body (4) and a cover body (5); the case body (1) is provided with an accommodation cavity (101); the mounting support is provided at the opening position of the accommodation cavity (101), and the mounting support (221) comprises a first support body (2211) and a second support body (2212) connected to each other; the inner wall of the case body (1) forming the accommodation cavity (101), the first support body (2211) and the second support body (2212) form a sealing space (3); the first adhesive body is arranged in the sealing space (3); the cover body (5) is fixed at one end of the case body (1), and at least part of the cover body (5) is connected to the first adhesive body (4).

Description

Battery system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 19, 2024, with application number 202420141547.2. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery system. Background Art

[0003] In related technologies, low-voltage battery systems are used in electric vehicles and are formed by assembling components such as battery modules, battery management systems, and integrated busbars into a box. SUMMARY OF THE INVENTION

[0004] However, the internal structure of the low-voltage battery system in the related art does not properly utilize the internal space of the low-voltage battery system box, resulting in the overall size of the low-voltage battery system being too large. Due to the limited space in the entire vehicle of an electric vehicle, it is necessary to reduce the overall size of the low-voltage battery system, thereby providing more feasible solutions for the layout of the low-voltage battery system within the vehicle.

[0005] The present application provides a battery system, comprising:

[0006] A box body is formed with a receiving cavity, and the receiving cavity is configured to receive the battery module;

[0007] A mounting bracket is disposed at the opening of the accommodating cavity, the mounting bracket comprising a first frame and a second frame connected to each other, the first frame extending toward the inner wall of the accommodating cavity, the second frame being disposed on a side of the first frame facing away from the accommodating cavity and extending in a direction away from the accommodating cavity; wherein the box body forms the inner wall of the accommodating cavity, and the first frame and the second frame form a sealing groove;

[0008] A first colloid is disposed in the sealing groove; and

[0009] The cover is fixed to one end of the box body, and at least a portion of the cover is connected to the first colloid. Beneficial effects

[0010] In the technical solution of the present application, since the mounting bracket is installed in the accommodating cavity, the sealing groove is formed by the first frame and the second frame in the mounting bracket and the inner wall of the box body. That is, the sealing groove is formed by the combination of different components (mounting bracket and box body), which effectively utilizes the space of the accommodating cavity inside the box body, so there is no need to open a sealing groove on the box body or other components to seal between the box body and the cover body, thereby effectively reducing the overall size of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a perspective schematic diagram of a battery system provided in an embodiment of the present application;

[0012] FIG2 is a perspective schematic diagram of a box provided in an embodiment of the present application without a mounting bracket installed;

[0013] FIG3 is a perspective schematic diagram of a battery system provided in an embodiment of the present application without a cover;

[0014] FIG4 is a perspective schematic diagram of a mounting bracket provided in an embodiment of the present application;

[0015] FIG5 is a schematic cross-sectional view of a battery system provided in an embodiment of the present application;

[0016] FIG6 is an enlarged schematic diagram of point A in FIG5 ;

[0017] FIG7 is an enlarged schematic diagram of the sealing groove at position A in FIG5 where the first colloid is not provided;

[0018] FIG8 is a schematic cross-sectional view of a box provided in an embodiment of the present application;

[0019] FIG9 is a perspective schematic diagram of a cover provided in an embodiment of the present application;

[0020] FIG10 is a perspective schematic diagram of another perspective of the box provided by an embodiment of the present application without the mounting bracket installed;

[0021] FIG11 is a schematic diagram of the assembly of a battery module and a battery management system according to an embodiment of the present application;

[0022] FIG12 is a schematic diagram of an assembly of a battery module installed in a box according to an embodiment of the present application;

[0023] FIG13 is a perspective schematic diagram of a box provided in an embodiment of the present application;

[0024] FIG14 is a schematic cross-sectional view of the box provided in an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 1000, battery system; 1, housing; 101, accommodating cavity; 2, battery module; 21, battery cell; 22, integrated busbar; 221, mounting bracket; 2211, first frame; 2212, second frame; 3, sealing groove; 4, first colloid; 5, cover; 11, first subsection; 12, second subsection; 111, first subsegment; 121, second subsegment; 6, stepped surface; 51, cover body; 52, protrusion; 1011, first subcavity; 1012, second subcavity; 7, battery Management system; 71. Main body; 72. First input part; 8. Limiting member; 81. Limiting part; 9. Limiting groove; 10. Glue injection groove; 13. Second colloid; 73. First output part; 222. Second input part; 14. Second output part; 15. Mounting groove; 16. Guide hole; 17. Connecting part; 18. Third colloid; 19. Limiting rib; 20. Buffer member; 223. Bus; 23. Protective cover; 24. Communication connector; 211. Pole; 25. Fixing member; 26. Output end. Modes for Carrying Out the Invention

[0027] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0030] The present application proposes a battery system, and Figures 1 to 14 are some embodiments of the present application. 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 direction, the second direction, and the third direction intersect with each other in pairs. The angles between the first direction, the second direction, and the third direction are not limited and can be 80°, 85°, 90°, 95°, or 100°. In the following embodiments, the angles between the first direction, the second direction, and the third direction are 90°, that is, a spatial rectangular coordinate system is established by the first direction, the second direction, and the third direction to explain some embodiments of the present application. It should be emphasized that the angle between the first direction, the second direction, and the third direction is 90° and does not constitute a limitation on the following embodiments of the present application.

[0031] Referring to Figures 1 and 2 , in some embodiments of the present application, a battery system 1000 includes a housing 1 having a housing 101 formed therein. The housing 101 is configured to accommodate a battery module 2. The battery module 2 includes a plurality of stacked battery cells 21. The plurality of battery cells 21 may be stacked along a second direction Y or a third direction X. In one embodiment of the present application, the plurality of battery cells 21 are stacked along the second direction Y.

[0032] Please refer to Figures 3 to 4. The battery system 1000 also includes a mounting bracket 221, which is arranged at the opening position of the accommodating cavity 101. The mounting bracket 221 includes a first frame 2211 and a second frame 2212 connected to each other. The first frame 2211 extends toward the inner wall of the accommodating cavity 101, and the second frame 2212 is arranged on the side of the first frame 2211 away from the accommodating cavity 101, and extends in a direction away from the accommodating cavity 101; wherein, the mounting bracket 221 is part of the integrated busbar 22, and the integrated busbar 22 can realize high-voltage series and parallel connection of multiple battery cells 21 in the battery module 2, as well as temperature sampling of the battery cell 21, voltage sampling of the battery cell 21, and overcurrent fuse function.

[0033] Please refer to Figure 5. The box body 1 forms the inner wall of the accommodating cavity 101, and the first frame 2211 and the second frame 2212 form a sealing groove 3. The battery system 1000 also includes a first colloid 4 and a cover 5. The first colloid 4 is arranged in the sealing groove 3. The cover 5 is fixed to one end of the box body 1. At least a portion of the cover 5 is connected to the first colloid 4. That is, the sealing groove 3 is defined between the mounting bracket 221 installed in the accommodating cavity 101 and the inner wall of the box body 1. The first colloid 4 is arranged in the sealing groove 3. When the cover body 5 is installed on the box body 1, the cover body 5 is connected to the first colloid 4, thereby achieving sealing between the box body 1 and the cover body 5.

[0034] In the technical solution of the present application, since the mounting bracket 221 is installed in the accommodating cavity 101, the sealing groove 3 is formed by the first frame 2211 and the second frame 2212 in the mounting bracket 221 and the inner wall of the box body 1. That is, the sealing groove 3 is formed by the combination of different components (mounting bracket 221 and box body 1), and the space of the accommodating cavity 101 inside the box body 1 is effectively utilized, so there is no need to provide a sealing groove 3 on the box body 1 or other components to seal between the box body 1 and the cover body 5, so as to effectively reduce the overall size of the battery system 1000.

[0035] In some embodiments of the present application, the accommodating cavity 101 is extended along the first direction Z. On this basis, the second frame 2212 is extended along the first direction Z, and the inner wall of the accommodating cavity 101 protrudes from the first frame 2211 in the first direction Z, so that the portion of the accommodating cavity 101 protruding from the first frame 2211 in the first direction Z can be arranged opposite to the second frame 2212; that is, the inner wall of the accommodating cavity 101, the first frame 2211, and the second frame 2212 can form a sealing groove 3 with a U-shaped cross-section.

[0036] It is understood that the first frame 2211 extends toward the inner wall of the accommodating cavity 101, ensuring that the periphery of the first frame 2211 extends toward the inner wall of the accommodating cavity 101 until it contacts the inner wall of the accommodating cavity 101. In one embodiment of the present application, the first frame 2211 extends along a plane perpendicular to the first direction Z.

[0037] In addition, since the sealing groove 3 is formed jointly by the mounting bracket 221 and the inner wall of the box body 1, in order to prevent the first colloid 4 located in the sealing groove 3 from overflowing from the gap between the mounting bracket 221 and the inner wall of the box body 1 onto the battery module 2, please refer to Figures 6 to 8. In some embodiments of the present application, the box body 1 includes a first sub-section 11 and a second sub-section 12 connected in sequence in the first direction Z, the first sub-section 11 includes a first sub-segment 111, the second sub-section 12 includes a second sub-segment 121, the first sub-segment 111 and the second sub-segment 121 are connected to each other, and the wall thickness of the first sub-segment 111 is smaller than the wall thickness of the second sub-segment 121, so that a step surface 6 is formed at the connection between the first sub-segment 111 and the second sub-segment 121; wherein the step surface 6 is against the side of the first frame 2211 facing away from the second frame 2212 in the first direction Z.

[0038] That is, in this embodiment, when the mounting bracket 221 is installed within the accommodating cavity 101, the side of the first frame 2211 facing away from the second frame 2212 in the first direction Z abuts against the stepped surface 6. The stepped surface 6 can restrict the movement of the mounting bracket 221 toward the battery module 2 located within the accommodating cavity 101. At the same time, because the side of the first frame 2211 facing away from the second frame 2212 in the first direction Z abuts against the stepped surface 6, the first colloid 4 is restricted from overflowing into the battery module 2. Please refer to FIG. 8 , in which the dotted-line area B represents the first subsection 11, and the dotted-line area C represents the second subsection 12.

[0039] Since the step surface 6 is formed by the box body 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 between the first sub-section 11 and the second sub-section 12 to be smaller than the wall thickness of the second sub-segment 121. There is no restriction on the wall thickness of the portion of the first sub-section 11 where the first sub-segment 111 is not formed. The wall thickness of the portion of the first sub-section 11 where the first sub-segment 111 is not formed can be greater than, equal to, or less than the wall thickness of the first sub-segment 111 so as not to affect the assembly of the mounting bracket 221. Similarly, there is no restriction on the wall thickness of the portion of the second sub-section 12 where the second sub-segment 121 is not formed. The wall thickness of the portion of the second sub-section 12 where the second sub-segment 121 is not formed can be greater than, equal to, or less than the wall thickness of the second sub-segment 121.

[0040] It should be noted that due to the assembly gap between the mounting bracket 221 and the box body 1, when the mounting bracket 221 is installed on the box body 1, there may be a certain gap between the first frame 2211 and the inner wall of the box body 1 on the horizontal plane perpendicular to the first direction Z, and there is a certain gap between the side of the first frame 2211 facing away from the second frame 2212 in the first direction Z and the step surface 6. However, since the first colloid 4 has a certain viscosity, it cannot completely pass through the gap between the first frame 2211 and the inner wall of the box body 1, and the first frame 2211 and the step surface 6, thereby preventing the first colloid 4 from overflowing into the battery module 2.

[0041] 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 proximal to the case 1 contacts the case 1. The protrusion 52 is disposed on the side of the cover body 51 proximal to the case 1 and extends into the sealing groove 3. At least a portion of the protrusion 52 is embedded in the first colloid 4. By providing the protrusion 52 embedded in the first colloid 4, the contact area between the cover 5 and the first colloid 4 is increased when the case 1 and the cover 5 are fixed, thereby improving the sealing performance of the battery system 1000.

[0042] Please refer to Figures 8, 10 and 11. In some embodiments of the present application, the accommodating 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 installed in the first sub-cavity 1011; the battery system 1000 also includes a battery management system 7, the battery management system 7 includes a main body 71 and at least one first input part 72 connected to the main body 71, the main body 71 is installed in the second sub-cavity 1012, and the first input part 72 is also connected to the battery module 2. That is, in this embodiment, the accommodating cavity 101 is divided into a first sub-cavity 1011 and a second sub-cavity 1012, thereby completing the installation of the battery module 2 and the battery management system 7 respectively; in one embodiment of the present application, the first input part 72 is directly welded to the pole 211 of the corresponding battery cell 21 in the battery module 2, thereby eliminating the need to use bolts or nuts to connect the first input part 72 and the pole 211 of the battery cell 21, thereby reducing the space installation requirement of the battery management system 7 in the box 1, thereby reducing the size of the battery system 1000.

[0043] In one 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.

[0044] The battery management system 7 and the battery module 2 are electrically connected. In one embodiment of the present application, the battery system 1000 further includes multiple busbars 223, which are also part of the integrated busbar 22. As shown in Figures 2 and 3, each busbar 223 connects the terminals 211 of two adjacent battery cells 21, thereby electrically connecting the multiple battery cells 21 in the battery module 2. The battery management system 7 also includes a first input portion 72, which connects to the terminal 211 of one of the battery cells 21 through the first input portion 72, thereby achieving electrical connection between the battery management system 7 and the battery module 2. It should be noted that since the battery module 2 as a whole has positive and negative outputs, the battery management system 7 is provided with two first input portions 72, one for connecting to the terminal 211 of each battery cell 21, that is, connecting the positive and negative outputs of the entire battery module 2. In one embodiment of the present application, the two first input portions 72 are spaced apart in the second direction Y and are both connected to the main body 71.

[0045] Referring to Figures 10 and 12 , the battery system 1000 further includes a retaining member 8 disposed on the inner wall of the second sub-cavity 1012. The retaining member 8 includes two retaining portions 81 spaced apart from each other to form a retaining groove 9, which communicates with the second sub-cavity 1012. At least a portion of the main body 71 is disposed within the retaining groove 9. In other words, in this embodiment, the retaining groove 9 enables the main body 71 to be positioned within the second sub-cavity 1012. Specifically, when the main body 71 is installed within the second sub-cavity 1012, the retaining groove 9 engages the main body 71. In one embodiment of the present application, the main body 71 extends along the plane where the first direction Z and the second direction Y are located, so the limit member 8 is installed on an inner wall of the box body 1 in the second direction Y, and the two limit portions 81 are spaced apart from each other in the third direction X to form a limit groove 9. When the main body 71 is embedded in the limit groove 9, the two limit portions 81 can realize the limitation of the main body 71 in the third direction X, and at the same time, the two opposite inner walls of the box body 1 in the second direction Y can realize the limitation of the main body 71 in the second direction Y.

[0046] It can be understood that the main body 71 extends along the plane where the first direction Z and the second direction Y are located, and the second direction Y is the stacking direction of multiple battery cells 21; such a setting can reduce the size of the box body 1 in the third direction X. At the same time, on the basis of meeting the stacking setting of multiple battery cells 21, the size of the box body 1 in the second direction Y will not be increased, which can effectively meet the design requirements of reducing the size of the battery system 1000.

[0047] To enhance the securement of the main body 71 within the second sub-cavity 1012, in some embodiments of the present application, at least one limiting portion 81 is further provided with a glue injection groove 10, which communicates with the limiting groove 9. The battery system 1000 further includes a second colloid 13, which is located within the limiting groove 9 and connected to the main body 71 located within the limiting groove 9. That is, in this embodiment, the second colloid 13 located within the limiting groove 9 glues the limiting portion 81 and the main body 71 together, thereby achieving relative fixation between the limiting portion 81 and the main body 71, thereby ensuring that the main body 71 is securely fixed within the second sub-cavity 1012.

[0048] In some embodiments of the present application, two limiting members 8 are provided; the main body 71 is located between the two limiting members 8. In order to ensure that the main body 71 does not loosen or fall off when fixed in the second sub-cavity 1012, two limiting members 8 are provided, thereby simultaneously fixing the opposite sides of the main body 71; and since the limiting member 8 is provided on an inner wall of the box body 1 in the second direction Y, the two limiting members 8 are arranged relatively along the second direction Y. Similarly, since a glue injection groove 10 is provided on the limiting member 81, and a second colloid 13 is provided in the glue injection groove 10, the limiting members 81 of the two limiting members 8 arranged relatively along the second direction Y are both provided with a glue injection groove 10 and the second colloid 13 is poured into the glue injection groove 10, so as to enhance the reliability of the fixation of the main body 71.

[0049] It can be understood that the structural form in which the main body 71 is clamped and limited by the limit member 8 and fixed in the second sub-cavity 1012 by the second colloid 13 reduces the space installation requirement of the battery management system 7 in the box 1 compared to the form of fixing the main body 71 with bolts or nuts in the related art, thereby reducing the size of the battery system 1000.

[0050] In addition, the limiting groove 9 and the glue injection groove 10 are both extended along the first direction Z to facilitate the installation of the main body 71 and the injection of the second glue 13 .

[0051] 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, wherein the second input unit 222 is disposed on the mounting bracket 221, and the second output unit 14 is disposed on the cover 5; wherein 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 second input unit 222 is part of the integrated busbar 22; in this embodiment, the output path of the battery system 1000 is as follows: the battery module 2 outputs current to the first input unit 72, the current is output to the second input unit 222 via the main body 71 and the first output unit 73, and then is transmitted to the second output unit 14 on the cover 5 for output.

[0052] Referring to Figure 9 , the cover 5 is also provided with an output terminal 26 , which is connected to the second output portion 14 , thereby transmitting current from the battery system 1000 to the vehicle equipment. There are also two output terminals 26 , one for positive output and the other for negative output. Therefore, the interconnected first input portion 72 , first output portion 73 , second input portion 222 , and second output portion 14 are each provided with two terminals, one for the positive output and one for the negative output, respectively.

[0053] In addition, a communication connector 24 is installed on the cover 5. The communication connector 24 is a communication connection interface between the battery system 1000 and the entire vehicle.

[0054] Referring to Figure 5 , the cover 5 has a mounting slot 15 formed on a side facing away from the housing 1. The cover 5 also has at least one guide hole 16 connecting the mounting slot 15 with the accommodating chamber 101. The battery system 1000 also includes a connecting portion 17 disposed within the mounting slot 15 and connected to the second output portion 14. At least a portion of the connecting portion 17 extends from the guide hole 16 into the accommodating chamber 101 and connects to the second input portion 222. In other words, in this embodiment, since the second output portion 14 is disposed on the cover 5 and the second input portion 222 is disposed on the mounting bracket 221 and located within the housing 1, a connecting portion 17 is further provided to connect the second input portion 222 and the second output portion 14 when the cover 5 and the housing 1 are assembled. The connecting portion 17 passes through the guide hole 16 to connect the second input portion 222 and the second output portion 14. In one embodiment of the present application, the connecting portion 17 is a combination of a bolt and a nut. In addition, in order to protect the connecting portion 17 in the installation groove 15 , the cover body 5 is further provided with a protective cover 23 at the groove opening of the installation groove 15 .

[0055] Referring to Figures 13 and 14 , the battery system 1000 further includes a third colloid 18 , which is positioned between at least a portion of the inner wall of the housing 1 forming the accommodating cavity 101 and the plurality of battery cells 21 . In other words, in this embodiment, the third colloid 18 is provided to secure the battery cells 21 within the accommodating cavity 101 . The application location of the third colloid 18 is not limited. In one embodiment, the third colloid 18 may be applied to all inner walls adjacent to the housing 1 where the plurality of battery cells 21 are located. In another embodiment, the third colloid 18 may be applied to only a portion of the inner wall adjacent to the housing 1 where the plurality of battery cells 21 are located.

[0056] In one embodiment of the present application, a portion of the third colloid 18 may be coated on the bottom end of the accommodating cavity 101. When the battery module 2 is installed in the accommodating cavity 101, the battery module 2 and the box body 1 are partially fixed. Then, the third colloid 18 is provided on all inner walls adjacent to the multiple battery cells 21 in the battery module 2 and the box body 1.

[0057] The battery system 1000 also includes at least one limiting rib 19, which is disposed on the inner wall of the housing 1 forming the accommodating cavity 101. The limiting rib 19 limits the position of the multiple battery cells 21. The limiting rib 19 can limit the multiple battery cells 21 when they are placed in the housing 1, while also increasing the overall structural strength of the housing 1. Similarly, when the multiple battery cells 21 are installed in the accommodating cavity 101, the limiting rib 19 can also separate the multiple battery cells 21 from the inner wall of the housing 1, providing sufficient space for the injection of the third colloid 18 and ensuring that the third colloid 18 located around the multiple battery cells 21 has sufficient bonding thickness. Referring to FIG. 13 , the limiting rib 19 is located on two opposing inner walls of the housing 1 in the second direction Y and extends along the first direction Z. Furthermore, the limiting rib 19 is also located on the bottom wall of the accommodating cavity 101 in the first direction Z and extends along the second direction Y.

[0058] Referring to FIG. 14 , in some embodiments of the present application, the battery system 1000 further includes at least one buffer 20 disposed between two adjacent battery cells 21. The buffer 20 has a certain elastic deformation capability, thereby providing a certain preload force for the two adjacent battery cells 21 after the battery module 2 is installed in the housing 1, thereby ensuring the cycling performance of the battery cells 21.

[0059] In addition, since the battery cells 21 are extended along the plane of the first direction Z and the third direction X, the buffer 20 is located between two adjacent battery cells 21, that is, the buffer 20 is located on one side of the battery cell 21 in the second direction Y, and the opposite sides of the battery cell 21 in the second direction Y are the expansion area of ​​the battery cell 21. The buffer 20 is arranged in this expansion area to avoid the third colloid 18 from being glued to the expansion area of ​​the battery cell 21, thereby avoiding the force generated when the battery cell 21 expands from acting on the box body 1 through the third colloid 18, thereby causing the box body 1 to crack.

[0060] Similarly, the buffer member 20 can also provide a buffering effect when the battery cell 21 expands. In one embodiment of the present application, the buffer member 20 is a buffer foam.

[0061] In some embodiments of the present application, a buffer member 20 is also provided between at least one battery cell 21 near the inner wall of the housing 1 forming the accommodating cavity 101 and the inner wall of the housing 1. That is, a buffer member 20 is also provided between the battery cell 21 and the inner wall of the housing 1 to prevent the expanded area of ​​the battery cell 21 from being directly bonded to the housing 1 via the third colloid 18.

[0062] Referring to Figure 11 , the battery system 1000 further includes a fixing member 25 disposed around the plurality of battery cells 21. The fixing member 25 secures the plurality of battery cells 21 in the battery module 2, facilitating assembly and installation of the plurality of battery cells 21 into the accommodating cavity 101. In one embodiment of the present application, the fixing member 25 is a fiberglass cloth.

Claims

1. A battery system comprising: A box body (1), wherein a receiving cavity (101) is formed on the box body (1), and the receiving cavity (101) is configured to receive a battery module (2); A mounting bracket (221) is arranged at the opening position of the accommodating cavity (101), and the mounting bracket (221) comprises a first frame (2211) and a second frame (2212) connected to each other, the first frame (2211) extending toward the inner wall of the accommodating cavity (101), and the second frame (2212) is arranged on a side of the first frame (2211) away from the accommodating cavity (101), and extends in a direction away from the accommodating cavity (101); wherein the box body (1) forms the inner wall of the accommodating cavity (101), and the first frame (2211) and the second frame (2212) form a sealing groove (3); A first colloid (4) is disposed in the sealing groove (3); and A cover body (5) is fixed to one end of the box body (1), and at least a portion of the cover body (5) is connected to the first colloid (4).

2. The battery system according to claim 1, wherein, The accommodating cavity (101) is extended along a first direction; The box body (1) comprises a first sub-section (11) and a second sub-section (12) which are sequentially connected in the first direction, the first sub-section (11) comprising a first sub-segment (111), the second sub-section (12) comprising a second sub-segment (121), the first sub-segment (111) and the second sub-segment (121) being connected to each other, and the wall thickness of the first sub-segment (111) is smaller than the wall thickness of the second sub-segment (121), so that a step surface (6) is formed at the connection between the first sub-segment (111) and the second sub-segment (121); Wherein, the step surface (6) abuts against a side of the first frame (2211) facing away from the second frame (2212) in the first direction.

3. The battery system according to claim 1, wherein, The cover body (5) comprises a cover body (51) and a convex portion (52), wherein the side of the cover body (51) close to the box body (1) contacts the box body (1), the convex portion (52) is arranged on the side of the cover body (51) close to the box body (1) and extends into the sealing groove (3), and at least a part of the convex portion (52) is embedded in the first colloid (4).

4. The battery system according to claim 1, wherein, The accommodating cavity (101) comprises a first sub-cavity (1011) and a second sub-cavity (1012) which are spaced apart from each other, and the battery module (2) is installed in the first sub-cavity (1011); The battery system (1000) further comprises a battery management system (7), wherein the battery management system (7) comprises a main body (71) and a first input part (72) connected to the main body (71), wherein the main body (71) is installed in the second sub-cavity (1012), and the first input part (72) is also connected to the battery module (2).

5. The battery system according to claim 4, wherein, The battery system (1000) further includes a limiting member (8), the limiting member (8) is disposed on the inner wall of the second sub-cavity (1012), the limiting member (8) includes two limiting portions (81), and the two limiting portions (81) are spaced apart from each other to form a limiting groove (9), and the limiting groove (9) communicates with the second sub-cavity (1012); At least a part of the main body portion (71) is disposed in the limiting groove (9).

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

7. The battery system according to claim 5, wherein, Two limiting members (8) are provided; the main body portion (71) is located between the two limiting members (8).

8. The battery system according to claim 4, wherein, 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 disposed on the mounting bracket (221), and the second output portion (14) is disposed on the cover body (5); Wherein, 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).

9. The battery system according to claim 8, wherein, The cover body (5) forms a mounting groove (15) on a side facing away from the box body (1), and at least one guiding hole (16) communicating the mounting groove (15) with the accommodating cavity (101) is further formed on the cover body (5); The battery system (1000) further includes a connecting portion (17), the connecting portion (17) is disposed in the mounting groove (15) and is connected to the second output portion (14); at least a part of the connecting portion (17) extends into the accommodating cavity (101) from the guiding hole (16) and connects the second input portion (222).

10. The battery system according to any one of claims 1 to 9, wherein, The battery module (2) includes a plurality of stacked battery cells (21); The battery system (1000) further includes a third colloid (18), the third colloid (18) is located between at least a part of the inner wall of the box body (1) forming the accommodating cavity (101) and the plurality of battery cells (21).

11. The battery system according to claim 10, wherein, The battery system (1000) further includes at least one limiting rib (19), the limiting rib (19) is disposed on the inner wall of the box body (1) forming the accommodating cavity (101), and the limiting rib (19) limits the plurality of battery cells (21).

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

13. The battery system according to claim 12, wherein, The buffer member (20) is also disposed between at least one of the battery cells (21) adjacent to the inner wall of the box body (1) forming the accommodating cavity (101) and the inner wall of the box body (1).

14. The battery system according to claim 10, wherein, The battery system (1000) further includes a fixing member (25) disposed around the plurality of battery cells (21).

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