Box body, battery pack and energy storage system

Abstract

The utility model relates to a box body, a battery pack and an energy storage system, the box body comprises a body, a maintenance cover and a mounting bracket, and the body is provided with a mounting cavity for accommodating a battery module and a maintenance port communicated with the mounting cavity. The maintenance cover is detachably connected with the body and covers the maintenance opening. The installation support is connected to the side, close to the installation cavity, of the maintenance cover and used for installing the battery management module. According to the box body, the mounting and fixing structure of the battery management module is simplified, the material cost is reduced, and the maintenance convenience of the battery management module is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a box, a battery pack and an energy storage system. Background Art

[0002] With the development of new energy technology, the application of secondary batteries is becoming more and more extensive. Secondary batteries are generally equipped with BMS (BATTERY MANAGEMENT SYSTEM) to improve the utilization rate of the battery and prevent the battery from overcharging and over-discharging. In the related art, the BMS is fixed in the body of the battery pack through a fixed bracket, which has a complex structure, high material cost, and inconvenient later maintenance, which can easily cause damage to the BMS. Summary of the invention

[0003] Based on this, it is necessary to provide a box, a battery pack and an energy storage system to improve the maintenance convenience of the battery management module.

[0004] A box body, comprising:

[0005] A body, wherein the body is provided with a mounting cavity for accommodating the battery module and a maintenance port communicated with the mounting cavity;

[0006] a maintenance cover, the maintenance cover being detachably connected to the body and covering the maintenance port; and,

[0007] A mounting bracket is connected to a side of the maintenance cover close to the mounting cavity, and is used for mounting a battery management module.

[0008] In the above-mentioned box, by integrating the mounting bracket for installing the battery management module on the side of the maintenance cover close to the mounting cavity, the need to set up an additional fixing bracket to fix the battery management module in the mounting cavity is eliminated, the installation and fixing structure of the battery management module is simplified, and the material cost is reduced. At the same time, during maintenance, the battery management module can be taken out from the maintenance port simultaneously by simply removing the maintenance cover from the main body, avoiding the need to remove the maintenance cover first and then remove the battery management module through the maintenance port, thereby avoiding the problem of accidental damage to the battery management module during disassembly and assembly due to limited operating space, reducing the operating procedures, and improving the convenience of maintenance of the battery management module.

[0009] The technical solution is further described below:

[0010] In one embodiment, the maintenance cover has a connection surface facing the maintenance port, the mounting bracket is connected to the connection surface, the mounting bracket has a mounting surface for carrying the battery management module, and the mounting surface and the connection surface are arranged at an acute angle. In this way, the longitudinal space and the lateral space occupied by the battery management module assembly can be reduced to adapt to the situation where the installation space is limited.

[0011] In one embodiment, the mounting bracket is provided with a stopper, and the stopper is used to stop the battery management module 50. The stopper can prevent the battery management module 50 from slipping and falling.

[0012] In one embodiment, the limiting portion includes a first baffle and a second baffle arranged at an angle, one end of the first baffle away from the second baffle is connected to the mounting bracket, and the first baffle, the second baffle and the mounting bracket are enclosed together to form a slot for the battery management module to be plugged in. In this way, the battery management module can be fixed by inserting one side of the battery management module into the slot.

[0013] In one embodiment, the mounting bracket is provided with a first fixing hole through it, and the first fixing hole is used to pass a threaded connector, and the threaded connector is connected to the battery management module, so as to enhance the fixing effect of the battery management module.

[0014] In one embodiment, the mounting bracket is provided with a hollow groove extending therethrough, which can effectively reduce the overall weight of the mounting bracket and the maintenance cover, and is also beneficial to heat dissipation of the battery management module.

[0015] In one embodiment, the box body further comprises a sealing member, which is disposed between the body and the maintenance cover and is disposed around the periphery of the maintenance port. The sealing member can enhance the sealing effect of the maintenance port to prevent external water or impurities from entering the installation cavity through the maintenance port.

[0016] In one embodiment, the mounting bracket is provided with a sealing ring groove, and the sealing member is arranged in the sealing ring groove. The sealing ring groove limits the sealing member, thereby preventing the sealing member from being displaced, thereby ensuring the sealing effect of the sealing member on the maintenance port.

[0017] The present application also provides a battery pack, including a battery module, a battery management module and the above-mentioned box, wherein the battery module is arranged in the installation cavity, the battery management module is fixed on the installation bracket, and the battery management module is electrically connected to the battery module.

[0018] The present application also provides an energy storage system, comprising the above-mentioned battery pack.

[0019] In the above-mentioned battery pack and energy storage system, by integrating the mounting bracket for installing the battery management module on the side of the maintenance cover close to the mounting cavity, the need to set up an additional fixing bracket to fix the battery management module in the mounting cavity is eliminated, the installation and fixing structure of the battery management module is simplified, and the material cost is reduced. At the same time, during maintenance, the battery management module can be taken out from the maintenance port simultaneously by simply removing the maintenance cover from the main body, avoiding the need to remove the maintenance cover first and then remove the battery management module through the maintenance port, thereby avoiding the problem of accidental damage to the battery management module during disassembly and assembly due to limited operating space, reducing the operating procedures, and improving the convenience of maintenance of the battery management module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0023] FIG. 1 is a schematic structural diagram of a box body according to an embodiment.

[0024] FIG. 2 is a front view of the box shown in FIG. 1 .

[0025] FIG. 3 is a cross-sectional view of the box body shown in FIG. 2 at the AA cross section.

[0026] FIG. 4 is a partial enlarged view of the box body shown in FIG. 3 at the part B. FIG.

[0027] FIG. 5 is a schematic structural diagram of a maintenance cover and a mounting bracket according to an embodiment.

[0028] FIG. 6 is a side view of the maintenance cover and mounting bracket shown in FIG. 5 .

[0029] FIG. 7 is a rear view of the maintenance cover and mounting bracket shown in FIG. 5 .

[0030] FIG. 8 is a partial enlarged view of the maintenance cover and the mounting bracket at the C portion shown in FIG. 7 .

[0031] FIG. 9 is a schematic structural diagram of an energy storage system according to an embodiment.

[0032] Description of reference numerals:

[0033] 1. Battery pack; 10. Main body; 11. Installation cavity; 12. Maintenance port; 20. Maintenance cover; 21. Sealing ring groove; 22. Second fixing hole; 23. Connection surface; 30. Mounting bracket; 31. Limiting part; 311. First baffle; 312. Second baffle; 313. Slot; 32. First fixing hole; 33. Hollow groove; 34. Installation surface; 40. Seal; 50. Battery management module; 60. Cabinet. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0040] Specifically, in a conventional battery pack 1, the assembly of the battery management module 50 requires first installing the battery management module 50 on a subassembly bracket, then connecting the subassembly bracket integrated with the battery management module 50 to a fixed bracket, and then fixing the fixed bracket in the box, resulting in a complex installation and fixing structure of the battery management module 50 and high material costs. At the same time, when the battery management module 50 needs to be maintained, the upper cover of the box is generally not removed. The only way is to remove the maintenance cover 20 of the box first, and then remove the battery management module 50 through the maintenance port 12. However, the maintenance port 12 of the box is usually small and the operating space is limited. When removing the battery management module 50, the fixing screws of the battery management module 50 often fall into the box, and due to the small operating space, during the disassembly and assembly operation, the fixing screws often slip due to limited operation, which can easily cause damage to the battery management module 50.

[0041] Based on this, an embodiment of the present application provides a box that can simplify the installation structure of the battery management module 50 and facilitate the maintenance of the battery management module 50. Specifically, referring to Figures 1 to 4, the box of one embodiment includes a body 10, a maintenance cover 20, and a mounting bracket 30. The body 10 is provided with a mounting cavity 11 for accommodating a battery module and a maintenance port 12 connected to the mounting cavity 11. The maintenance cover 20 is detachably connected to the body 10 and covers the maintenance port 12. The mounting bracket 30 is connected to the side of the maintenance cover 20 close to the mounting cavity 11, and the mounting bracket 30 is used to install the battery management module 50.

[0042] In the above-mentioned box, by integrating the mounting bracket 30 for mounting the battery management module 50 on the side of the maintenance cover 20 close to the mounting cavity 11, the need to set up an additional fixing bracket to fix the battery management module 50 in the mounting cavity 11 is eliminated, the mounting and fixing structure of the battery management module 50 is simplified, and the material cost is reduced. At the same time, during maintenance, the battery management module 50 can be taken out from the maintenance port 12 by simply removing the maintenance cover 20 from the main body 10, avoiding the need to remove the maintenance cover 20 first and then remove the battery management module 50 through the maintenance port 12, thereby avoiding the problem of accidental damage to the battery management module 50 during disassembly and assembly due to limited operating space, reducing the operating procedures, and improving the convenience of maintenance of the battery management module 50.

[0043] Optionally, in one embodiment, the maintenance cover 20 and the mounting bracket 30 are an integrally formed structure, for example, the maintenance cover 20 and the mounting bracket 30 are an integrally injection molded structure. It is worth noting that in other embodiments, the maintenance cover 20 and the mounting bracket 30 can also be welded or bonded or connected by bolts or other connecting parts to form a whole.

[0044] Referring to FIG. 5 and FIG. 6 , in one embodiment, the maintenance cover 20 has a connection surface 23 facing the maintenance port 12, and the mounting bracket 30 is connected to the connection surface 23. The mounting bracket 30 has a mounting surface 34 for carrying the battery management module 50, and the mounting surface 34 is arranged at an acute angle with the connection surface 23. That is, the mounting bracket 30 is arranged obliquely relative to the maintenance cover 20, so that the longitudinal space occupied by the assembly of the battery management module 50 can be reduced to adapt to the situation where the installation height is limited. At the same time, the lateral space occupied by the assembly of the battery management module 50 can also be reduced, and the technical problem that the battery management module 50 cannot be assembled horizontally due to the limited width space is solved.

[0045] Furthermore, the angle between the mounting surface 34 and the connecting surface 23 can be 20° to 80°, for example, 20°, 30°, 45°, 60°, 75°, 80°, etc., thereby reducing both the longitudinal space occupied by the assembly of the battery management module 50 and the lateral space occupied by the assembly of the battery management module 50.

[0046] Continuing to refer to FIG. 5 and FIG. 6 , optionally, in one embodiment, the mounting bracket 30 is provided with a stopper 31, and the stopper 31 is used to stop the battery management module 50 by clamping and fitting, so as to fix the battery management module 50. Specifically, since the mounting bracket 30 is tilted, the mounting bracket 30 has a high side and a low side, and the stopper 31 is arranged at a position where the mounting surface 34 of the mounting bracket 30 is close to the low side, so that the battery management module 50 can be prevented from slipping and falling by the stopper 31. Furthermore, the number of the stopper 31 can be two or more, for example, two, three, four, five or more, so as to improve the stopper effect.

[0047] 5, optionally, the limiting portion 31 includes a first baffle 311 and a second baffle 312 arranged at an angle, one end of the first baffle 311 away from the second baffle 312 is connected to the mounting bracket 30, and the first baffle 311, the second baffle 312 and the mounting bracket 30 are enclosed together to form a slot 313 for plugging the battery management module 50. In this way, by inserting one side of the battery management module 50 into the slot 313, the battery management module 50 can be fixed.

[0048] Continuing to refer to FIG. 5 , in one embodiment, the mounting bracket 30 is provided with a first fixing hole 32 through which a screw or other threaded connector is inserted. The threaded connector is connected to the battery management module 50, thereby enhancing the fixing effect of the battery management module 50. Furthermore, the number of the first fixing holes 32 is multiple. For example, in the present embodiment, the mounting bracket 30 is provided with four first fixing holes 32 through which the four first fixing holes 32 are respectively arranged at the four corners of the mounting bracket 30. Each first fixing hole 32 is provided with a threaded connector for connecting the battery management module 50, thereby further improving the connection stability of the battery management module 50. It is worth noting that in other embodiments, the number of the first fixing holes 32 may also be two, three, five or more, which is not limited here.

[0049] Referring to FIG. 7 , a hollow groove 33 is formed through the mounting bracket 30. The hollow groove 33 can effectively reduce the overall weight of the mounting bracket 30 and the maintenance cover 20, thereby making it easier to disassemble and assemble, while saving material costs. In addition, the hollow groove 33 is also conducive to heat dissipation of the battery management module 50, preventing the battery management module 50 from operating at an excessively high temperature.

[0050] Referring to Fig. 4, in one embodiment, the box body further includes a sealing member 40, which is disposed between the body 10 and the maintenance cover 20, and is disposed around the periphery of the maintenance opening 12. By disposing the sealing member 40 between the body 10 and the maintenance cover 20, the sealing effect of the maintenance opening 12 can be enhanced, and external water or impurities are prevented from entering the installation cavity 11 through the maintenance opening 12 to contaminate the battery assembly.

[0051] Referring to FIG. 8 , further, the mounting bracket 30 is provided with a sealing ring groove 21 , in which the sealing member 40 is disposed. The sealing ring groove 21 acts as a limiter on the sealing member 40 , thereby preventing the sealing member 40 from being displaced and misaligned, thereby ensuring the sealing effect of the sealing member 40 on the maintenance port 12 .

[0052] 8 , optionally, in one embodiment, the maintenance cover 20 is provided with a second fixing hole 22, and a screw or other threaded fastener is passed through the second fixing hole 22, and the threaded fastener is connected to the body 10, so as to achieve the fixation of the maintenance cover 20 to the body 10 and facilitate the removal of the maintenance cover 20. It is understandable that in other embodiments, the maintenance cover 20 and the body 10 can also be fixed by gluing or clamping, which is not limited here.

[0053] Furthermore, an embodiment of the present application also provides a battery pack 1. Specifically, the battery pack 1 of one embodiment includes a battery module, a battery management module 50 and a box body of any of the above-mentioned embodiments. The battery module is arranged in the installation cavity 11, the battery management module 50 is fixed on the installation bracket 30, and the battery management module 50 is electrically connected to the battery module.

[0054] Referring to Fig. 9, an embodiment of the present application further provides an energy storage system. Specifically, the energy storage system of an embodiment includes a battery pack 1 of any of the above embodiments. Further, in an embodiment, the energy storage system includes a plurality of battery packs 1, and the energy storage system also includes a cabinet 60, the cabinet 60 is provided with a plurality of placement positions, and the battery packs 1 are arranged on the placement positions one by one.

[0055] In the above-mentioned battery pack 1 and energy storage system, by integrating the mounting bracket 30 for mounting the battery management module 50 on the side of the maintenance cover 20 close to the mounting cavity 11, an additional fixing bracket is omitted to fix the battery management module 50 in the mounting cavity 11, thereby simplifying the installation and fixing structure of the battery management module 50 and reducing the material cost. At the same time, during maintenance, the battery management module 50 can be taken out simultaneously by simply removing the maintenance cover 20 from the body 10, avoiding the need to remove the maintenance cover 20 first and then remove the battery management module 50 through the maintenance port 12, thereby avoiding the problem of accidental damage to the battery management module 50 during operation due to limited operating space, reducing the operating procedures, and improving the convenience of maintenance of the battery management module 50.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A box, characterized in that: include: A body, wherein the body is provided with a mounting cavity for accommodating the battery module and a maintenance port communicated with the mounting cavity; a maintenance cover, the maintenance cover being detachably connected to the body and covering the maintenance port; and, A mounting bracket is connected to a side of the maintenance cover close to the mounting cavity, and is used for mounting a battery management module.

2. The box according to claim 1, characterized in that: The maintenance cover has a connection surface facing the maintenance port, the mounting bracket is connected to the connection surface, the mounting bracket has a mounting surface for carrying the battery management module, and the mounting surface is arranged at an acute angle to the connection surface.

3. The box according to claim 1, characterized in that: The mounting bracket is protrudingly provided with a limiting portion, and the limiting portion is used to limit the battery management module.

4. The box according to claim 3, characterized in that: The limiting portion includes a first baffle and a second baffle arranged at an angle, and one end of the first baffle away from the second baffle is connected to the mounting bracket, and the first baffle, the second baffle and the mounting bracket together form a slot for the battery management module to be plugged in.

5. The box according to claim 1, characterized in that: The mounting bracket is provided with a first fixing hole extending therethrough. The first fixing hole is used for passing a threaded connector, and the threaded connector is connected to the battery management module.

6. The box according to claim 1, characterized in that: The mounting bracket is provided with a hollow groove extending therethrough.

7. The box according to claim 1, characterized in that: The box body further comprises a sealing member, which is arranged between the main body and the maintenance cover, and the sealing member is arranged around the periphery of the maintenance opening.

8. The box according to claim 7, characterized in that: The mounting bracket is provided with a sealing ring groove, and the sealing member is arranged in the sealing ring groove.

9. A battery pack, characterized in that: It comprises a battery module, a battery management module and the box body as described in any one of claims 1-8, wherein the battery module is arranged in the installation cavity, the battery management module is fixed on the installation bracket, and the battery management module is electrically connected to the battery module.

10. An energy storage system, characterized in that: A battery pack comprising the battery pack of claim 9.

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