Battery system

Abstract

The utility model provides a battery system. The battery system comprises a box body, a mounting bracket, a first colloid and a cover body, according to the technical scheme, due to the fact that the installation support is installed in the containing cavity, the sealing groove is formed by the first support body and the second support body in the installation support and the inner wall of the box body in an enclosing mode, namely the sealing groove is formed by combining different parts (the installation support and the box body). According to the battery system, the space of the accommodating cavity in the box body is effectively utilized, so that a sealing groove does not need to be additionally formed in the box body or other parts for sealing between the box body and the cover body, and the overall size of the battery system is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery system. Background Art

[0002] In the related art, the low-voltage battery system is used in electric vehicles, and is formed by assembling battery modules, battery management systems, integrated busbars and other components into a box. Since the internal structure of the low-voltage battery system in the related art does not reasonably utilize the internal space of the box of the low-voltage battery system, the overall size of the low-voltage battery system is too large. However, since the vehicle carrying space of electric vehicles is limited, 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 in the vehicle. Utility Model Content

[0003] The embodiment of the utility model provides a battery system, which can improve the technical problem in a low-voltage battery system that the overall size of the battery system is difficult to reduce due to insufficient utilization of the internal space.

[0004] In a first aspect, an embodiment of the utility model provides a battery system, comprising:

[0005] A box body, wherein a receiving cavity is formed on the box body, and the receiving cavity is configured to receive a battery module;

[0006] A mounting bracket is arranged at the opening of the accommodating cavity, the mounting bracket comprises a first frame and a second frame connected to each other, the first frame extends toward the inner wall of the accommodating cavity, the second frame is arranged on a side of the first frame away from the accommodating cavity, and extends 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;

[0007] A first colloid is disposed in the sealing groove; and

[0008] The cover is fixed at one end of the box, and at least a part of the cover is connected to the first colloid.

[0009] In one embodiment, the accommodating cavity is extended along the first direction;

[0010] The box body includes a first sub-section and a second sub-section sequentially connected in the first direction, the first sub-section includes a first sub-segment, the second sub-section includes a second sub-segment, the first sub-segment and the second sub-segment are connected to each other, and the wall thickness of the first sub-segment is smaller than the wall thickness of the second sub-segment, so that a step surface is formed at the connection between the first sub-segment and the second sub-segment;

[0011] The step surface abuts against a side of the first frame body that is away from the second frame body in the first direction.

[0012] In one embodiment, the cover body includes a cover body and a protrusion, wherein the cover body contacts the box body on one side close to the box body, the protrusion is arranged on the cover body on one side close to the box body and extends into the sealing groove, and at least a portion of the protrusion is embedded in the first colloid.

[0013] In one embodiment, the accommodating cavity includes a first sub-cavity and a second sub-cavity spaced apart from each other, and the battery module is installed in the first sub-cavity;

[0014] The battery system further includes a battery management system, which includes a main body and a first input part connected to the main body, the main body is installed in the second sub-cavity, and the first input part is also connected to the battery module.

[0015] In one embodiment, the battery system further includes at least one limiting member, the limiting member is disposed on the inner wall of the second sub-cavity, the limiting member includes two limiting portions, the two limiting portions are spaced apart from each other to form a limiting groove, and the limiting groove is communicated with the second sub-cavity;

[0016] At least a portion of the main body is disposed in the limiting groove.

[0017] In one embodiment, at least one of the limiting parts is further provided with a glue injection groove, and the glue injection groove is connected to the limiting groove;

[0018] The battery system further includes a second colloid, which is located in the limiting groove and connected to the main body located in the limiting groove.

[0019] In one embodiment, two of the limiting members are provided; and the main body is located between the two limiting members.

[0020] In one embodiment, the battery management system further includes at least one first output unit;

[0021] The battery system further comprises a second input portion and a second output portion, wherein the second input portion is disposed on the mounting bracket, and the second output portion is disposed on the cover;

[0022] The first output part is connected to the second input part, and the second input part is connected to the second output part.

[0023] In one embodiment, the cover body is formed with a mounting groove on a side away from the box body, and the cover body is also provided with at least one guide hole connecting the mounting groove and the accommodating cavity;

[0024] The battery system further includes a connecting portion, which is disposed in the mounting groove and connected to the second output portion; at least a portion of the connecting portion extends from the guide hole into the accommodating cavity and is connected to the second input portion.

[0025] In one embodiment, the battery module includes a plurality of stacked battery cells;

[0026] The battery system further includes a third colloid, and the third colloid is located between at least a portion of the inner wall of the box body forming the accommodating cavity and the plurality of battery cells.

[0027] In one embodiment, the battery system further comprises at least one limiting rib, wherein the limiting rib is arranged on an inner wall of the box body forming the accommodating cavity, and the limiting rib limits the plurality of battery cells.

[0028] In one embodiment, the battery system further includes at least one buffer, and the buffer is disposed between two adjacent battery cells.

[0029] In one embodiment, the buffer member is also disposed between at least one of the battery cells close to the box body forming an inner wall of the accommodating cavity and the inner wall of the box body.

[0030] In one embodiment, the battery system further includes a fixing member, and the fixing member is disposed around the plurality of battery cells.

[0031] Beneficial effects of the embodiments of the utility model:

[0032] In the technical solution of the utility model, since the mounting bracket is installed in the accommodating cavity, the sealing groove is formed by the first frame body and the second frame body 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), and the space of the accommodating cavity inside the box body is effectively utilized, so that 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, so as to effectively reduce the overall size of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a three-dimensional schematic diagram of a battery system provided by an embodiment of the utility model;

[0035] Figure 2 It is a three-dimensional schematic diagram of a box provided by an embodiment of the utility model without a mounting bracket installed;

[0036] Figure 3 It is a three-dimensional schematic diagram of a battery system provided by an embodiment of the utility model without a cover;

[0037] Figure 4 It is a three-dimensional schematic diagram of a mounting bracket provided in an embodiment of the utility model;

[0038] Figure 5 is a cross-sectional schematic diagram of a battery system provided by an embodiment of the utility model;

[0039] Figure 6 yes Figure 5 The enlarged schematic diagram of point A in the middle;

[0040] Figure 7 yes Figure 5 An enlarged schematic diagram of the sealing groove at A in the middle where the first colloid is not provided;

[0041] Figure 8 It is a cross-sectional schematic diagram of a box provided by an embodiment of the utility model;

[0042] Fig. 9 It is a three-dimensional schematic diagram of a cover body provided by an embodiment of the utility model;

[0043] Fig.10 It is a three-dimensional schematic diagram from another perspective of the box provided by the embodiment of the utility model without the installation bracket installed;

[0044] Fig.11 It is a schematic diagram of the assembly of a battery module and a battery management system provided by an embodiment of the utility model;

[0045] Fig.12 It is an assembly schematic diagram of a battery module installed in a box provided by an embodiment of the utility model;

[0046] Fig.13 It is a three-dimensional schematic diagram of a box provided by an embodiment of the utility model;

[0047] Fig.14 It is a cross-sectional schematic diagram of a box body provided by an embodiment of the utility model.

[0048] Reference numerals:

[0049] 1000, battery system; 1, box; 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 sub-section; 12, second sub-section; 111, first sub-section; 121, second sub-section; 6, step surface; 51, cover body; 52, convex portion; 1011, first sub-cavity; 1012, second sub-cavity; 7, battery Management system; 71, main body; 72, first input part; 8, limiter; 81, limiter; 9, limiter 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, limiter rib; 20, buffer; 223, bus; 23, protective cover; 24, communication connector; 211, pole; 25, fixing part; 26, output end. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0051] In the related art, the low-voltage battery system is used in electric vehicles, and is formed by assembling battery modules, battery management systems, integrated busbars and other components into a box. Since the internal structure of the low-voltage battery system in the related art does not reasonably utilize the internal space of the box of the low-voltage battery system, the overall size of the low-voltage battery system is too large. However, since the vehicle carrying space of electric vehicles is limited, 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 in the vehicle.

[0052] In view of this, the utility model proposes a battery system. Figures 1 to 14 Some embodiments of the present invention are shown below. Figures 1 to 14As shown, 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 each other in pairs, and 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°; preferably, in the following embodiments, the angles between the first direction, the second direction, and the third direction are 90° for explanation, 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°, which does not constitute a limitation on the following embodiments of the present application.

[0053] See also Figure 1 to Figure 2 In some embodiments of the present application, the battery system 1000 includes a box body 1, and a receiving cavity 101 is formed on the box body 1, and the receiving cavity 101 is configured to accommodate a battery module 2. The battery module 2 includes a plurality of stacked battery cells 21; wherein the stacking direction of the plurality of battery cells 21 is not limited, and the plurality of battery cells 21 may be stacked along the second direction Y or along the third direction X. In a specific embodiment of the present application, the plurality of battery cells 21 are stacked along the second direction Y.

[0054] See also Figure 3 to Figure 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, wherein the first frame 2211 extends 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 mounting bracket 221 is a part of the integrated busbar 22, and the integrated busbar 22 is used to realize the high-voltage series and parallel connection of multiple battery cells 21 in the battery module 2, as well as the temperature sampling of the battery cell 21, the voltage sampling of the battery cell 21, and the over-current fuse function.

[0055] See also Figure 5The 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 body 5, the first colloid 4 is arranged in the sealing groove 3, the cover body 5 is fixed at one end of the box body 1, at least a part of the cover body 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, and when the cover body 5 is installed on the box body 1, the cover body 5 is connected to the first colloid 4, thereby realizing the sealing between the box body 1 and the cover body 5.

[0056] In the technical solution of the present utility model, 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 that there is no need to open 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.

[0057] 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.

[0058] It is understandable that the first frame 2211 extends toward the inner wall of the accommodating cavity 101, and the extension direction of the first frame 2211 is not limited, as long as the periphery of the first frame 2211 extends toward the inner wall of the accommodating cavity 101 and is close to the inner wall of the accommodating cavity 101. In a specific embodiment of the present application, the first frame 2211 is extended on a plane perpendicular to the first direction Z.

[0059] In addition, since the sealing groove 3 is formed 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 abuts against the side of the first frame 2211 facing away from the second frame 2212 in the first direction Z.

[0060] That is, in the above embodiment, when the mounting bracket 221 is installed inside the accommodating cavity 101, the side of the first frame 2211 away from the second frame 2212 in the first direction Z abuts against the step surface 6, and the step surface 6 can limit the movement of the mounting bracket 221 toward the battery module 2 located in the accommodating cavity 101. At the same time, because the side of the first frame 2211 away from the second frame 2212 in the first direction Z abuts against the step surface 6, the first colloid 4 is limited from overflowing into the battery module 2. Please refer to Figure 8 , Figure 8 The area B selected by the dashed line is the first sub-section 11 , and the area C is the second sub-section 12 .

[0061] Furthermore, since the step surface 6 is formed by the box body 1 having wall thicknesses of different sizes, it is sufficient to define in the above embodiment that the wall thickness of the first sub-segment 111 at the connection between the first sub-section 11 and the second sub-section 12 is less than the wall thickness of the second sub-segment 121, and the wall thickness of the portion of the first sub-section 11 where the first sub-segment 111 is not formed is not limited, and 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, the wall thickness of the portion of the second sub-section 12 where the second sub-segment 121 is not formed is not limited, and can be greater than, equal to, or less than the wall thickness of the second sub-segment 121.

[0062] It should be noted that, due to the existence of an assembly gap between the mounting bracket 221 and the box body 1, when the mounting bracket 221 is installed on the box body 1, a certain gap may exist between the first frame 2211 and the inner wall of the box body 1 on a horizontal plane perpendicular to the first direction Z, and a certain gap may exist between the side of the first frame 2211 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 two parts described above, thereby preventing the first colloid 4 from overflowing into the battery module 2.

[0063] See also Figure 5 and Fig. 9 In some embodiments of the present application, the cover 5 includes a cover body 51 and a convex portion 52, wherein the cover body 51 contacts the box body 1 at a side close to the box body 1, the convex portion 52 is arranged at a side of the cover body 51 close to the box body 1 and extends into the sealing groove 3, and at least a portion of the convex portion 52 is embedded in the first colloid 4. By providing the convex portion 52 embedded in the first colloid 4, when the box body 1 and the cover 5 are fixed, the contact area between the cover 5 and the first colloid 4 is increased, so as to further improve the sealing performance of the battery system 1000.

[0064] See also Figure 8 , Fig.10 and Fig.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 the first sub-cavity 1011 and the 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 further reducing the size of the battery system 1000.

[0065] In a specific 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.

[0066] The battery management system 7 is electrically connected to the battery module 2. In one embodiment of the present application, the battery system 1000 further includes a plurality of busbars 223, which are also part of the integrated busbar 22 described above; see Figure 2 and Figure 3 , each of the busbars 223 connects the poles 211 of two adjacent battery cells 21, so that the multiple battery cells 21 in the battery module 2 are electrically connected, and the battery management system 7 also has a first input part 72, through which the pole 211 of one of the battery cells 21 is connected, thereby realizing the 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 a positive output and a negative output, the battery management system 7 is provided with two first input parts 72 to respectively connect the poles 211 of different battery cells 21, that is, to connect the positive output and negative output of the battery module 2 as a whole. In a specific embodiment of the present application, the two first input parts 72 are arranged at intervals in the second direction Y, and are both connected to the main body 71.

[0067] See also Fig.10 and Fig.12 The battery system 1000 further includes a stopper 8, which is disposed on the inner wall of the second sub-cavity 1012. The stopper 8 includes two stoppers 81, and the two stoppers 81 are spaced apart from each other to form a stopper groove 9, which is in communication with the second sub-cavity 1012; at least a portion of the main body 71 is disposed in the stopper groove 9. That is, in this embodiment, the stopper groove 9 is used to realize the stopper installation of the main body 71 in the second sub-cavity 1012, that is, when the main body 71 is installed in the second sub-cavity 1012, the stopper groove 9 clamps the main body 71. In a specific 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 limiting member 8 is installed on an inner wall of the box body 1 in the second direction Y, and the two limiting portions 81 are spaced apart from each other in the third direction X to form the limiting groove 9. When the main body 71 is embedded in the limiting groove 9, the two limiting portions 81 can realize the limiting of the main body 71 in the third direction X, and at the same time, the two relative inner walls of the box body 1 in the second direction Y can realize the limiting of the main body 71 in the second direction Y.

[0068] 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 the multiple battery cells 21; such a configuration can reduce the size of the box body 1 in the third direction X, and at the same time, on the basis of satisfying the stacking configuration of the multiple battery cells 21, the size of the box body 1 in the second direction Y will not be further increased. The combination of the above schemes can effectively meet the design requirements of reducing the size of the battery system 1000.

[0069] Further, in order to improve the reliability of fixing the main body 71 in the second sub-cavity 1012, in some embodiments of the present application, at least one of the limiting parts 81 is further provided with a glue injection groove 10, and the glue injection groove 10 is connected to the limiting groove 9; the battery system 1000 further includes a second colloid 13, which is located in the limiting groove 9 and connected to the main body 71 located in the limiting groove 9. That is, in this embodiment, the second colloid 13 located in the limiting groove 9 is glued to the limiting part 81 and the main body 71, so as to achieve relative fixation between the limiting part 81 and the main body 71, thereby enabling the main body 71 to be fixed firmly in the second sub-cavity 1012.

[0070] In some embodiments of the present application, two limiters 8 are provided; the main body 71 is located between the two limiters 8. In order to ensure that the main body 71 will not loosen or fall off when it is fixed in the second sub-cavity 1012, two limiters 8 are provided, so as to fix the opposite sides of the main body 71 at the same time; and on the basis of the limiter 8 being provided on an inner wall of the box body 1 in the second direction Y as described above, the two limiters 8 are relatively provided along the second direction Y. Similarly, based on the embodiment described above in which the glue injection groove 10 is provided on the limiter 81 and the second colloid 13 is provided in the glue injection groove 10, the limiter 81 of the two limiters 8 relatively provided along the second direction Y is provided with the glue injection groove 10 and the second colloid 13 is poured in the glue injection groove 10, so as to further enhance the reliability of the fixation of the main body 71.

[0071] It can be understood that the structure in which the main body 71 mentioned above is clamped and limited by the limit member 8 and fixed in the second sub-cavity 1012 by the second colloid 13, compared with the form of fixing the main body 71 with bolts or nuts in the related art, reduces the space installation requirement of the battery management system 7 in the box 1, thereby further reducing the size of the battery system 1000.

[0072] 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 colloid 13 .

[0073] See also Figure 2 , Figure 3 and Figure 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 is arranged on the mounting bracket 221, and the second output unit 14 is arranged 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. wherein the second input unit 222 is a part of the integrated busbar 22 described above; 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.

[0074] Specifically, see Fig. 9 The cover 5 is also provided with an output terminal 26, which is connected to the second output part 14, so as to deliver the current of the battery system 1000 to the vehicle equipment. The output terminals 26 also have two, one for positive output and the other for negative output, so the first input part 72, the first output part 73, the second input part 222 and the second output part 14 connected to each other are each provided with two, so as to connect the positive output and the negative output respectively.

[0075] In addition, a communication connector 24 is installed on the cover body 5, and the communication connector 24 is a communication connection interface between the battery system 1000 and the whole vehicle.

[0076] See also Figure 5, the cover 5 is formed with a mounting groove 15 on the side away from the box 1, and the cover 5 is also provided with at least one guide hole 16 connecting the mounting groove 15 and the accommodating chamber 101; the battery system 1000 also includes a connecting portion 17, which is arranged in the mounting groove 15 and connected to the second output portion 14; at least part of the connecting portion 17 extends from the guide hole 16 into the accommodating chamber 101 and connects the second input portion 222. That is, in this embodiment, since the second output portion 14 is arranged on the cover 5, the second input portion 222 is arranged on the mounting bracket 221 and is located in the box 1, when the cover 5 is assembled with the box 1, in order to connect the second input portion 222 and the second output portion 14, the connecting portion 17 is further provided, and the connecting portion 17 passes through the guide hole 16 to connect the second input portion 222 and the second output portion 14. In a specific 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 protection cover 23 at the groove position of the installation groove 15 .

[0077] See also Figure 13 to Figure 14 , the battery system 1000 further includes a third colloid 18, and the third colloid 18 is located between at least a portion of the inner wall of the box body 1 forming the accommodating cavity 101 and the plurality of battery cells 21. That is, in this embodiment, the third colloid 18 is provided to fix the battery cells 21 in the accommodating cavity 101; wherein, the coating position of the third colloid 18 is not limited, in one embodiment, the third colloid 18 may be provided on all inner walls adjacent to the box body 1 of the plurality of battery cells 21; in another embodiment, the third colloid 18 may be provided on a portion of the inner wall adjacent to the box body 1 of the plurality of battery cells 21.

[0078] In one embodiment of the present application, a portion of the third colloid 18 can be coated on the bottom end of the accommodating cavity 101, and when the battery module 2 is installed in the accommodating cavity 101, the battery module 2 and the box body 1 are partially fixed, and 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.

[0079] Furthermore, the battery system 1000 also includes at least one limiting rib 19, and the limiting rib 19 is arranged on the inner wall of the box body 1 that forms the accommodating cavity 101, and the limiting rib 19 limits the plurality of battery cells 21. The limiting rib 19 can limit the plurality of battery cells 21 when the plurality of battery cells 21 are placed in the box body 1, and can also increase the overall structural strength of the box body 1; similarly, when the plurality of battery cells 21 are installed in the accommodating cavity 101, the limiting rib 19 can also separate the plurality of battery cells 21 from the inner wall of the box body 1, so as to provide sufficient space for the injection of the third colloid 18, and ensure that the third colloid 18 located around the plurality of battery cells 21 has sufficient bonding thickness. Please refer to Fig.13 The limiting ribs 19 are located on two opposite inner walls of the box body 1 in the second direction Y and extend along the first direction Z; in addition, the limiting ribs 19 are also located on the bottom wall of the accommodating cavity 101 in the first direction Z and extend along the second direction Y.

[0080] See also Fig.14 In some embodiments of the present application, the battery system 1000 further includes at least one buffer 20, which is disposed between two adjacent battery cells 21. The buffer 20 has a certain elastic deformation capability, so that after the battery module 2 is installed in the box 1, a certain pre-tightening force can be provided for the two adjacent battery cells 21, thereby ensuring the cycle performance of the battery cells 21.

[0081] In addition, since the battery cell 21 is extended along the plane where the first direction Z and the third direction X are located, 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.

[0082] Similarly, the buffer member 20 can also provide a buffering effect when the battery core 21 expands. In a specific embodiment of the present application, the buffer member 20 is a buffer foam.

[0083] Furthermore, in some embodiments of the present application, the buffer member 20 is also provided between at least one of the battery cells 21 near the box 1 forming the inner wall of the accommodating cavity 101 and the inner wall of the box 1. That is, the buffer member 20 is also provided between the battery cell 21 and the inner wall of the box 1, so as to avoid the expansion area of ​​the battery cell 21 and the box 1 being directly bonded through the third colloid 18 on the basis of the above embodiment.

[0084] See also Fig.11 The battery system 1000 further includes a fixing member 25, which is arranged around the plurality of battery cells 21. The fixing member 25 is provided to fix the plurality of battery cells 21 in the battery module 2, so that the plurality of battery cells 21 are assembled and installed in the accommodating cavity 101. In a specific embodiment of the present application, the fixing member 25 is a glass fiber cloth.

[0085] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery system, characterized in that: include: A box body, wherein a receiving cavity is formed on the box body, and the receiving cavity is configured to receive a battery module; A mounting bracket is arranged at the opening of the accommodating cavity, the mounting bracket comprises a first frame and a second frame connected to each other, the first frame extends toward the inner wall of the accommodating cavity, the second frame is arranged on a side of the first frame away from the accommodating cavity, and extends 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; A first colloid is disposed in the sealing groove; and The cover is fixed at one end of the box, and at least a part of the cover is connected to the first colloid.

2. The battery system according to claim 1, characterized in that: The accommodating cavity is extended along a first direction; The box body includes a first sub-section and a second sub-section sequentially connected in the first direction, the first sub-section includes a first sub-segment, the second sub-section includes a second sub-segment, the first sub-segment and the second sub-segment are connected to each other, and the wall thickness of the first sub-segment is smaller than the wall thickness of the second sub-segment, so that a step surface is formed at the connection between the first sub-segment and the second sub-segment; The step surface abuts against a side of the first frame body that is away from the second frame body in the first direction.

3. The battery system according to claim 1, characterized in that: The cover body includes a cover body and a convex portion, wherein a side of the cover body close to the box body contacts the box body, the convex portion is arranged on a side of the cover body close to the box body and extends into the sealing groove, and at least a part of the convex portion is embedded in the first colloid.

4. The battery system according to claim 1, characterized in that: The accommodating cavity comprises a first sub-cavity and a second sub-cavity spaced apart from each other, and the battery module is installed in the first sub-cavity; The battery system further includes a battery management system, which includes a main body and a first input part connected to the main body, the main body is installed in the second sub-cavity, and the first input part is also connected to the battery module.

5. The battery system according to claim 4, characterized in that: The battery system further includes a limiting member, which is disposed on an inner wall of the second sub-cavity, and includes two limiting portions, the two limiting portions are spaced apart from each other to form a limiting groove, and the limiting groove is communicated with the second sub-cavity; At least a portion of the main body is disposed in the limiting groove.

6. The battery system according to claim 5, characterized in that: At least one of the limiting parts is also provided with a glue injection groove, and the glue injection groove is connected to the limiting groove; The battery system further includes a second colloid, which is located in the limiting groove and connected to the main body located in the limiting groove.

7. The battery system according to claim 5, characterized in that: The plurality of limit members are provided with two limit members; the main body is located between the two limit members.

8. The battery system according to claim 4, characterized in that: The battery management system further includes a first output unit; The battery system further comprises a second input portion and a second output portion, wherein the second input portion is disposed on the mounting bracket, and the second output portion is disposed on the cover; The first output part is connected to the second input part, and the second input part is connected to the second output part.

9. The battery system according to claim 8, characterized in that: The cover body is formed with a mounting groove on a side away from the box body, and the cover body is also provided with at least one guide hole connecting the mounting groove and the accommodating cavity; The battery system further includes a connecting portion, which is disposed in the mounting groove and connected to the second output portion; at least a portion of the connecting portion extends from the guide hole into the accommodating cavity and is connected to the second input portion.

10. The battery system according to any one of claims 1 to 9, characterized in that: The battery module includes a plurality of stacked battery cells; The battery system further includes a third colloid, and the third colloid is located between at least a portion of the inner wall of the box body forming the accommodating cavity and the plurality of battery cells.

11. The battery system according to claim 10, characterized in that: The battery system further includes at least one limiting rib, which is disposed on an inner wall of the box body that forms the accommodating cavity, and the limiting rib limits the plurality of battery cells.

12. The battery system according to claim 10, characterized in that: The battery system further includes at least one buffer member, which is disposed between two adjacent battery cells.

13. The battery system according to claim 12, characterized in that: The buffer member is also arranged between at least one of the battery cells close to the box body forming an inner wall of the accommodating cavity and the inner wall of the box body.

14. The battery system according to claim 10, characterized in that: The battery system further comprises a fixing member, which is arranged around the plurality of battery cells.

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