Battery management system protection box and battery pack

Abstract

The utility model discloses a battery management system protection box and a battery pack, and relates to the field of battery pack protection, and the battery management system protection box comprises a box body; the connecting assembly comprises an inner sleeve unit arranged in the box body, a connecting bolt penetrating through the inner sleeve unit and a wire harness inserting port formed in one side of the box body, and the inner sleeve unit is through in the thickness direction of the box body; and the protection assembly comprises a protection unit clamped outside the box body, and one end of the protection unit extends to a position above the wire harness plugging port. By arranging the box body and the inner sleeve unit in the box body, stable covering of the box body can be guaranteed, meanwhile, connection bolts can be conveniently arranged through the inner sleeve unit in the thickness direction of the box body, connection of the box body and the battery pack is facilitated, a flange or a support does not need to be additionally arranged on the box body, and the occupied space of the box body in the battery pack is reduced; through the protection assembly which is clamped with the box body and extends to the wire harness plugging port, condensate water can be prevented from dropping to the wire harness plugging port.

Description

Technical Field

[0001] The utility model relates to the field of battery pack protection, and in particular to a battery management system protection box and a battery pack. Background Art

[0002] The battery management system (BMS) is commonly known as the battery nanny or battery butler. Its main function is to intelligently manage and maintain each battery unit, monitor the battery status, prevent the battery from overcharging and over-discharging, and extend the battery life. The BMS is generally loaded in a BMS box and assembled in the battery pack together with the battery cells.

[0003] In order to increase the volumetric energy density of batteries, more and more battery packs have smaller spaces. To meet the installation requirements of the BMS box, it is generally necessary to reserve flanges or weld brackets on the box to set up installation points, which increases the space occupied by the BMS box. In the limited space of the battery box, the installation of the BMS box becomes more difficult. At the same time, when there is insufficient space in the battery pack, the BMS box is generally placed vertically. This arrangement causes the connectors to be connected vertically from top to bottom. If the condensed water gradually formed during the use of the battery pack drips on the connector, it will directly cause the board to burn and the battery pack to be damaged. Utility Model Content

[0004] The present application provides a battery management system protective box and a battery pack, which can solve the technical problems in the prior art that the battery pack space is limited, and the BMS box needs to reserve flanges or weld brackets to set up installation points, which increases the space occupied by the BMS box, and when the BMS box is placed upright, condensed water will drip on the connector, causing the board to burn and the battery pack function to be damaged.

[0005] In a first aspect, an embodiment of the present application provides a battery management system protection box, including:

[0006] a box body; and

[0007] A connecting assembly, comprising an inner sleeve unit disposed inside the box body, a connecting bolt penetrating the inner sleeve unit, and a wiring harness plug interface opened on one side of the box body, wherein the inner sleeve unit penetrates the box body in a thickness direction;

[0008] The protection component comprises a protection unit which is engaged with the outside of the box body, and one end of the protection unit extends to the top of the wiring harness plug interface.

[0009] In one embodiment, the box body includes a first cover body and a second cover body that overlap each other along a thickness direction of the box body.

[0010] In one embodiment, the inner sleeve unit includes a first sleeve disposed on the first cover body and a second sleeve disposed on the second cover body and sleeved in the first sleeve.

[0011] In one embodiment, a first locking block and a second locking block disposed above the first locking block and spaced a certain distance from the first locking block are disposed at one end of the second sleeve away from the first sleeve, and the thickness of the first locking block is greater than that of the second locking block.

[0012] In one embodiment, the protective unit includes two longitudinally arranged connecting ears and a protective cover arranged on the top of the connecting ears, the connecting ears are engaged with the first engaging block and the second engaging block, and the protective cover is located above the wiring harness plug interface.

[0013] In one embodiment, the bottom of the connecting ear is provided with a folded surface facing the second sleeve.

[0014] In one embodiment, the folded surface is located between the first engaging block and the second engaging block.

[0015] In one embodiment, a first semicircular hole is provided on the upper surface of the first engaging block, and a second semicircular hole is provided at the connection between the connecting ear and the folded surface to cooperate with the first semicircular hole to form a threaded hole.

[0016] In one embodiment, a wire outlet groove is provided on a side of the protective cover away from the connecting ear.

[0017] In a second aspect, the present application provides a battery pack, which includes the above-mentioned battery management system protective box.

[0018] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0019] 1. The battery management system protection box in the present application is provided with a box body and an inner sleeve unit in the box body, which can ensure that the box body itself is stably covered. The penetration performance of the inner sleeve unit along the thickness direction of the box body facilitates the setting of connecting bolts for mechanically connecting the box body with the battery pack, and no additional flanges or welding brackets are required on the box body, thereby reducing the space occupied by the box body in the battery pack;

[0020] 2. The battery management system protection box in the present application is provided with a protection component engaged with the box body, and the protection component can extend above the wiring harness plug interface on the box body, which can play a blocking role, prevent condensed water from dripping directly on the wiring harness plug interface, and can protect the battery;

[0021] 3. The battery management system protection box in this application has a simple overall structure, strong practicality and easy installation, and can meet the protection needs of most battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 A schematic diagram of a battery management system protection box structure provided in an embodiment of the present application;

[0024] Figure 2 An exploded view of the structure of a battery management system protection box provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of a protection unit in a protection box of a battery management system provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of a second sleeve in a battery management system protection box provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the connection between a second sleeve and a protection unit in a battery management system protection box provided in an embodiment of the present application.

[0028] In the figure: 1, box body; 101, first cover body; 102, second cover body; 103, circuit board; 2, inner sleeve unit; 201, first sleeve; 202, second sleeve; 203, connecting bolt; 204, first clamping block; 205, second clamping block; 206, first semicircular hole; 3, wiring harness plug interface; 4, protection unit; 401, connecting ear; 402, protective cover; 403, folding surface; 404, second semicircular hole; 405, wire outlet groove. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The embodiments of the present application provide a battery management system protective box and a battery pack, which can solve the technical problems in the prior art that the battery pack space is limited, and the BMS box needs to reserve flanges or weld brackets to set up installation points, which increases the space occupied by the BMS box, and when the BMS box is placed upright, condensed water will drip on the connector, causing the board to burn and the battery pack function to be damaged.

[0031] Figure 1 A schematic diagram of a battery management system protection box structure provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the battery management system protection box in the present application includes a box body 1, a connecting component and a protective component. The circuit main board 103 of the battery management system is arranged in the box body 1 and is connected to the battery pack through a low-voltage wiring harness to detect the working status of each battery cell. The connecting component is mainly used to ensure the cover of the box body 1 itself and the mechanical connection between the box body 1 and the battery pack. The protective component is mainly used to form a protective layer above the box body 1 to prevent condensed water from dripping directly onto the box body 1.

[0032] Specifically, the connection assembly includes an inner sleeve unit 2 disposed inside the box body 1, a connection bolt 203 penetrating the inner sleeve unit 2, and a wiring harness plug interface 3 opened on one side of the box body 1. The inner sleeve unit 2 penetrates along the thickness direction of the box body 1, and the box body 1 itself is covered in place by the inner sleeve unit 2. The penetration of the inner sleeve unit 2 along the thickness direction of the box body 1 facilitates the arrangement of the connection bolt 203 in the inner sleeve unit 2 for mechanically connecting the box body 1 to the battery pack, without reserving a flange or welding bracket on the box body 1, which can reduce the space occupied by the box body 1 in the battery pack. The wiring harness plug interface 3 on the box body 1 facilitates the connection of the wiring harness to the circuit board 103 in the box body 1.

[0033] As an optional embodiment, the inner walls of the first sleeve 201 and the second sleeve 202 are both provided with internal threads matching the connecting bolts 203 .

[0034] Furthermore, the protective component includes a protective unit 4 that is engaged with the outside of the box body 1 and one end of the protective unit 4 extends above the wiring harness plug interface 3. The protective component is detachably connected to the box body 1 itself. After the box body 1 is connected to the battery pack, the protective component is engaged with the box body 1. The protective component extends above the wiring harness plug interface 3 to prevent condensed water from the battery pack from dripping directly onto the wiring harness plug interface 3.

[0035] Furthermore, Figure 2 A structural exploded diagram of a battery management system protection box provided in an embodiment of the present application, such as Figure 2As shown, the box body 1 includes a first cover body 101 and a second cover body 102 which cover each other along the thickness direction of the box body 1, and the inner sleeve unit 2 includes a first sleeve 201 arranged on the first cover body 101 and a second sleeve 202 arranged on the second cover body 102 and sleeved in the first sleeve 201. The first sleeve 201 is fixedly connected to the inner wall of the first cover body 101, and the second sleeve 202 is fixedly arranged on the inner wall of the second cover body 102. In the present application, there are two first sleeves 201 and two second sleeves 202, respectively. The two first sleeves 201 and the two second sleeves 202 are respectively arranged at the two ends of the box body 1 in the width direction, and through holes are also opened at the relative positions of the two ends of the circuit main board 103. One end of the second sleeve 202 passes through the through hole on the circuit main board 103 and is sleeved in the first sleeve 201 to achieve the covering of the first cover body 101 and the second cover body 102.

[0036] Furthermore, Figure 4 This is a schematic diagram of the structure of a second sleeve 202 in a battery management system protection box provided in an embodiment of the present application, such as Figure 4 As shown, the end of the second sleeve 202 away from the first sleeve 201 is provided with a first snap-fit ​​block 204 and a second snap-fit ​​block 205 arranged above the first snap-fit ​​block 204 and spaced a certain distance from the first snap-fit ​​block 204, and the thickness of the first snap-fit ​​block 204 is greater than the thickness of the second snap-fit ​​block 205, and the end of the second sleeve 202 away from the first sleeve 201 is located on the outer surface of the box body 1, and there is a certain thickness difference between the first snap-fit ​​block 204 and the second snap-fit ​​block 205. In one embodiment of the present application, the first snap-fit ​​block 204 and the second snap-fit ​​block 205 are both semicircular and the arc surfaces of the first snap-fit ​​block 204 and the second snap-fit ​​block 205 are away from each other.

[0037] Furthermore, Figure 3 A schematic diagram of the structure of a protection unit 4 in a protection box of a battery management system provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the protection unit 4 includes two longitudinally arranged connection ears 401 and a protective cover 402 arranged on the top of the connection ears 401. The connection ears 401 are engaged with the first engaging block 204 and the second engaging block 205, and the protective cover 402 is located above the wiring harness plug interface 3. The connection ears 401 are arranged at the bottom of both ends of the protective cover 402 for engaging with the box body 1. Specifically, the connection ears 401 are engaged with the first engaging block 204 and the second engaging block 205. The protective cover 402 is arranged horizontally and is located above the wiring harness plug interface 3 to block dripping condensed water. There is a certain distance between the protective cover 402 and the box body 1 to avoid the wiring space of the low-voltage harness. As an optional embodiment, the protective cover 402 in the present application can be a plate or an inward-buckled cover body, which can block dripping water. The specific setting form is not specifically limited in the present application.

[0038] Furthermore, a folded surface 403 facing the second sleeve 202 is provided at the bottom of the connecting ear 401, and the folded surface 403 is located between the first snap-fit ​​block 204 and the second snap-fit ​​block 205. The folded surface 403 and the connecting ear 401 are at a right angle, and the distance between the first snap-fit ​​block 204 and the second snap-fit ​​block 205 is slightly larger than the thickness of the folded surface 403, and the length of the folded surface 403 does not exceed the thickness of the first snap-fit ​​block 204.

[0039] Furthermore, Figure 5 A schematic diagram of the connection between the second sleeve 202 and the protection unit 4 in a battery management system protection box provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, a first semicircular hole 206 is provided on the upper surface of the first locking block 204, and a second semicircular hole 404 is provided at the connection between the connecting ear 401 and the folded surface 403, which cooperates with the first semicircular hole 206 to form a threaded hole. The arc surface of the first semicircular hole 206 faces downward, and the second semicircular hole 404 is consistent in size with the first semicircular hole 206 and the arc surface of the second semicircular hole 404 faces upward. When the folded surface 403 is placed between the first locking block 204 and the second locking block 205, the first semicircular hole 206 and the second semicircular hole 404 cooperate with each other to form a completed bolt hole. If space permits, a bolt is arranged in the bolt hole to improve the connection stability between the protective unit 4 and the box body 1.

[0040] Further, such as Figure 3 As shown, a wire outlet groove 405 is provided on the side of the protective cover 402 away from the connecting ear 401. The wire outlet groove 405 is a plurality of grooves opened on the side of the protective cover 402 away from the connecting ear 401. After assembly, the low-voltage wire harness connected to the circuit main board 103 first passes through the wire harness plug interface 3 and then passes through the wire outlet groove 405 and is connected to each battery unit.

[0041] In a second aspect, an embodiment of the present application further provides a battery pack, which includes the above-mentioned battery management system protective box.

[0042] When assembling the battery management system protective box in the present application in the battery pack, first open a through hole at the corresponding position of the circuit main board 103, then cover the first cover body 101 and the second cover body 102 of the box body 1 in place through the first sleeve 201 and the second sleeve 202, then connect the wiring harness, and then engage the connecting ear 401 in the protective unit 4 between the first snap block 204 and the second snap block 205, and then pass the connecting bolt 203 through the first sleeve 201 and the second sleeve 202 to mechanically connect the box body 1 to the battery pack, and the outer end of the second sleeve 202 is close to the battery pack to complete the installation.

[0043] The battery management system protection box in the present application can achieve a stable connection of the box body 1 itself by setting a first sleeve 201 and a second sleeve 202 on the box body 1. The first sleeve 201 and the second sleeve 202 penetrate along the thickness direction of the box body 1, which is convenient for setting a connecting bolt 203 in the inner sleeve unit 2 for mechanically connecting the box body 1 to the battery pack. There is no need to additionally set a flange on the box body 1, thereby reducing the space occupied by the battery management system protection box in the battery pack. By setting a protection unit 4 outside the box body 1, a protective surface can be formed above the wiring harness plug interface 3 to prevent condensed water from dripping onto the wiring harness plug interface, thereby protecting the circuit board 103 and the battery pack.

[0044] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0045] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0046] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A battery management system protection box, characterized in that: include: Box body (1); as well as A connection assembly, comprising an inner sleeve unit (2) arranged inside the box body (1), a connection bolt (203) passing through the inner sleeve unit (2), and a wiring harness plug interface (3) opened on one side of the box body, wherein the inner sleeve unit (2) passes through the box body (1) in a thickness direction; A protection component comprises a protection unit (4) which is engaged with the outside of the box body (1), and one end of the protection unit (4) extends to above the wiring harness plug interface (3).

2. A battery management system protection box as claimed in claim 1, characterized in that: The box body (1) comprises a first cover body (101) and a second cover body (102) which cover each other along the thickness direction of the box body (1).

3. A battery management system protection box as claimed in claim 2, characterized in that: The inner sleeve unit (2) comprises a first sleeve (201) arranged on the first cover body (101) and a second sleeve (202) arranged on the second cover body (102) and sleeved inside the first sleeve (201).

4. A battery management system protection box as claimed in claim 3, characterized in that: A first locking block (204) and a second locking block (205) are provided at one end of the second sleeve (202) away from the first sleeve (201) and are arranged above the first locking block (204) and spaced a certain distance from the first locking block (204), and the thickness of the first locking block (204) is greater than the thickness of the second locking block (205).

5. A battery management system protection box as claimed in claim 4, characterized in that: The protection unit (4) comprises two longitudinally arranged connection ears (401) and a protection cover (402) arranged on the top of the connection ears (401); the connection ears (401) are engaged with the first engaging block (204) and the second engaging block (205); and the protection cover (402) is located above the wiring harness plug interface (3).

6. A battery management system protection box as claimed in claim 5, characterized in that: The bottom of the connecting ear (401) is provided with a folded surface (403) facing the second sleeve (202).

7. A battery management system protection box as claimed in claim 6, characterized in that: The folded surface (403) is located between the first engaging block (204) and the second engaging block (205).

8. A battery management system protection box as claimed in claim 6, characterized in that: A first semicircular hole (206) is provided on the upper surface of the first engaging block (204), and a second semicircular hole (404) is provided at the connection between the connecting ear (401) and the folded surface (403) to cooperate with the first semicircular hole (206) to form a threaded hole.

9. A battery management system protection box as claimed in claim 5, characterized in that: A wire outlet groove (405) is provided on a side of the protective cover (402) away from the connecting ear (401).

10. A battery pack, characterized in that: It comprises a battery management system protection box as described in any one of claims 1 to 9.

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