BMS protection assembly, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a BMS (Battery Management System) protection assembly, a battery pack and electric equipment, and relates to the technical field of batteries, in particular to the BMS protection assembly comprising an upper shell and a lower shell, the upper shell covers the lower shell, an accommodating cavity is formed between the upper shell and the lower shell, the accommodating cavity is used for accommodating a battery management system, and the battery pack is arranged in the accommodating cavity. Therefore, effective positioning and protection of the battery management system are achieved. On the basis, the upper shell and the lower shell are both made of PVC materials. It needs to be explained that the PVC material is low in density and light in weight, the upper shell and the lower shell which are supported by the PVC material are light in weight, and the transportation cost can be reduced. And moreover, the PVC material is easy to form in a heating state, various working procedures such as shearing, stamping, bending and welding are not needed, the manufacturing is simple, the period is short, and the manufacturing cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a BMS protection component, a battery pack, and an electrical device. Background Technology

[0002] With the rapid development of the electric vehicle and energy storage system market, higher requirements are being placed on the reliability and safety of battery management systems (BMS). As a key component protecting battery modules from external environmental influences, the materials and design of BMS protection components directly affect the performance and safety of the entire system. Currently, most BMS protection components on the market are manufactured using sheet metal parts.

[0003] Sheet metal materials were widely used in the production of BMS protective components in the early days due to their good mechanical strength and ease of processing. However, the production process of sheet metal parts involves multiple steps such as stamping and bending, resulting in a long overall manufacturing cycle; and because the metal itself has a high density, the finished product is relatively heavy. Utility Model Content

[0004] The purpose of this invention is to provide a BMS protection component, battery pack, and electrical equipment that are lightweight and low-cost.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In a first aspect, this utility model provides a BMS protection component, including an upper housing and a lower housing, with the upper housing covering the lower housing and forming an accommodating cavity between the upper housing and the lower housing for accommodating the battery management system; and both the upper housing and the lower housing are made of PVC material.

[0007] In an optional embodiment, the wall thickness of the upper housing ranges from 0.5 mm to 1 mm, and the wall thickness of the lower housing ranges from 0.5 mm to 1 mm.

[0008] In an optional implementation, the upper and lower housings are integrally formed.

[0009] In an optional implementation, the BMS protection assembly also includes a bracket for connecting the lower housing to the mechanical frame.

[0010] In an optional embodiment, the upper housing has a first positioning hole, the lower housing has a second positioning hole, the bracket has a third positioning hole, and the BMS protection assembly also includes fasteners, which pass through the first positioning hole, the second positioning hole, and the third positioning hole in sequence.

[0011] In an optional embodiment, there are four first positioning holes, which are respectively located at the four corners of the upper housing; the first positioning hole, the second positioning hole, and the fastener all correspond one-to-one with the first positioning hole.

[0012] In an optional embodiment, the bracket includes a connecting plate and two support plates, with the connecting plate connected to the lower housing and the two support plates connected at an angle to the opposite sides of the connecting plate, and used for connection to the mechanical frame.

[0013] In an optional embodiment, the support plate includes a first support portion, a second support portion, and a connecting portion, all of which are connected to the connecting plate. The connecting portion connects the first support portion and the second support portion, and the height dimension of the first support portion is lower than the height dimension of the second support portion.

[0014] Secondly, the present invention provides a battery pack, including a BMS protection component and a battery management system according to any of the foregoing embodiments, wherein the battery management system is located within the BMS protection component.

[0015] Thirdly, this utility model provides an electrical device, including a battery pack and a device body as described in the foregoing embodiments, wherein the battery pack and the device body are electrically connected.

[0016] The beneficial effects of this utility model embodiment are as follows: This utility model embodiment provides a BMS protection component, a battery pack, and electrical equipment, which includes an upper shell and a lower shell. The upper shell covers the lower shell, and a receiving cavity is formed between the upper shell and the lower shell. The receiving cavity is used to accommodate the battery management system, thereby achieving effective positioning and protection of the battery management system. Based on the above, both the upper shell and the lower shell are made of PVC material. It should be noted that PVC material has low density and light weight, resulting in a lightweight upper and lower shell supported by PVC, which can reduce transportation costs. Furthermore, PVC material is easy to mold under heating conditions, eliminating the need for multiple processes such as shearing, stamping, bending, and welding, making manufacturing simple and quick, and reducing manufacturing costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the BMS protection component provided in an embodiment of the present utility model;

[0019] Figure 2 This is another schematic diagram of the BMS protection component provided in this embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the bracket provided in an embodiment of the present utility model.

[0021] Icons: 10-BMS protection component; 100-Upper housing; 300-Lower housing; 500-Bracket; 510-Connecting plate; 511-First through hole; 530-Support plate; 531-First support part; 533-Connecting part; 535-Second support part; 537-Second through hole; 700-Fastener. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example

[0029] This invention provides an electrical device, specifically an electric ship or an electric vehicle. The device includes a battery pack and a main body, with the battery pack electrically connected to the main body. For example, the main body can be an electric motor, capable of converting the electrical energy provided by the battery pack into mechanical energy to drive the propeller in an electric ship or the wheels in an electric vehicle.

[0030] The battery pack includes a BMS protection component 10 and a battery management system, with the battery management system located within the BMS protection component 10. It is understood that the BMS protection component 10 is lightweight and low-cost; correspondingly, the battery pack and electrical equipment using this BMS protection component 10 also benefit from lightweight design.

[0031] The specific structure of each component of the BMS protection component 10 provided in this embodiment and their corresponding relationships will be described in detail below. Figure 1 This is a schematic diagram of the BMS protection component 10 provided in an embodiment of the present invention. Figure 2 Another schematic diagram of the BMS protection component 10 provided in this embodiment of the present utility model.

[0032] Please see Figure 1 and Figure 2 This utility model provides a BMS protection component 10, which includes an upper housing 100 and a lower housing 300. The upper housing 100 covers the lower housing 300, and a receiving cavity is formed between the upper housing 100 and the lower housing 300. The receiving cavity is used to accommodate the battery management system, thereby achieving effective positioning and protection of the battery management system.

[0033] Based on the above, both the upper shell 100 and the lower shell 300 are made of PVC (polyvinyl chloride) material. It should be noted that PVC material has low density and is lightweight, resulting in a lighter upper shell 100 and lower shell 300, which reduces transportation costs. Furthermore, PVC material is easily molded under heat, eliminating the need for multiple processes such as shearing, stamping, bending, and welding, simplifying manufacturing and shortening the cycle time, thus reducing manufacturing costs.

[0034] In addition, it should be noted that PVC material also has excellent antistatic, insulating and flame-retardant properties. The upper shell 100 and lower shell 300 made of PVC also have the benefits of reducing the risk of electrostatic discharge and improving reliability; improving electrical safety and reducing electromagnetic interference; and improving fire safety and reducing the risk of fire.

[0035] In some embodiments, the upper housing 100 and the lower housing 300 are integrally formed. For example, the upper housing 100 and the lower housing 300 are integrally formed using injection molding, which involves injecting molten PVC material into a closed mold and then forming it under pressure. Another example is the integral forming of the upper housing 100 and the lower housing 300 using vacuum forming, which involves heating a thermoplastic sheet to a softened state and then vacuum forming it into the desired shape using a mold.

[0036] Considering that excessive wall thickness of the upper housing 100 or lower housing 300 can easily affect the heat dissipation of the battery management system, while insufficient wall thickness can easily affect the protection effect on the battery management system, the wall thickness of the upper housing 100 can be in the range of 0.5mm to 1mm, and correspondingly, the wall thickness of the lower housing 300 can be in the range of 0.5mm to 1mm.

[0037] Please see Figure 3 , Figure 3 This is a schematic diagram of the bracket 500 provided in an embodiment of the present invention. The BMS protection assembly 10 also includes the bracket 500, which is used to connect the lower housing 300 and the mechanical frame. Based on the above-mentioned bracket 500, the lower housing 300, which houses the battery management system, can be connected to the mechanical frame in the battery pack, ensuring the stability of the battery management system's position.

[0038] To increase the structural strength of the BMS protection assembly 10, the upper housing 100 has a first positioning hole, the lower housing 300 has a second positioning hole, and the bracket 500 has a third positioning hole. The BMS protection assembly 10 also includes a fastener 700, which passes through the first positioning hole, the second positioning hole, and the third positioning hole in sequence.

[0039] Based on the fastener 700, on the one hand, a tight connection is achieved between the upper housing 100 and the lower housing 300, effectively resisting external vibrations and impacts, including preventing damage to the battery management system inside the accommodating cavity; on the other hand, a fastening connection is also achieved between the lower housing 300 and the bracket 500, thereby further fixing the lower housing 300 containing the battery management system in the mechanical frame of the battery pack, ensuring the stability of the battery management system position.

[0040] In this embodiment, the fastener 700 is an M3 bolt, and the first, second, and third positioning holes are hole-like structures that mate with the MS bolt. In other embodiments, the fastener 700 can also be a screw or a pin. Furthermore, in other embodiments, the upper housing 100, the lower housing 300, and the fastener 700 can be fixed together using a snap-fit ​​structure; for example, a snap-fit ​​portion can be provided on the upper housing 100, and a corresponding snap-fit ​​groove can be provided on the lower housing 300.

[0041] To evenly distribute assembly stress, four first positioning holes are provided, each located at one of the four corners of the upper housing 100. It is understood that these four first positioning holes provide symmetrical fixing points, reducing deformation or damage caused by uneven positioning. Based on the above, the first positioning holes, second positioning holes, and fasteners 700 all correspond one-to-one with the first positioning holes. It should be noted that this one-to-one correspondence refers to both positional and quantity correspondence.

[0042] Please refer to it again. Figure 3 As an optional embodiment, the bracket 500 includes a connecting plate 510 and two support plates 530. The connecting plate 510 is connected to the lower housing 300; the two support plates 530 are connected at an angle to opposite sides of the connecting plate 510 and are used to connect to the mechanical frame. That is to say, the bracket 500 has a U-shaped structure, creating a gap between the lower housing 300 and the fixed frame, effectively increasing airflow and aiding in heat dissipation for the battery management system.

[0043] Based on the above, multiple first through holes 511 can be provided on the connecting plate 510, and multiple second through holes 537 can be provided on the support plate 530, so as to realize the lightweight design of the BMS protection component 10. In addition, it can also be understood that the design of the first through holes 511 can reduce the contact area between the connecting plate 510 and the lower housing 300, effectively promoting air circulation and heat conduction without affecting the structural strength, and improving the heat dissipation efficiency of the battery management system.

[0044] Furthermore, to reduce the footprint of the BMS protection assembly 10, the support plate 530 includes a first support portion 531, a second support portion 535, and a connecting portion 533, all of which are connected to the connecting plate 510. The connecting portion 533 connects the first support portion 531 and the second support portion 535. The height of the first support portion 531 is lower than the height of the second support portion 535, thereby tilting the lower housing 300 and the upper housing 100 to reduce their projected area on the mechanical frame and improve space utilization.

[0045] This utility model provides a BMS protection component 10, a battery pack, and electrical equipment, which includes an upper housing 100 and a lower housing 300. The upper housing 100 covers the lower housing 300, and a receiving cavity is formed between the upper housing 100 and the lower housing 300. The receiving cavity is used to accommodate the battery management system, thereby achieving effective positioning and protection of the battery management system. Based on the above, both the upper housing 100 and the lower housing 300 are made of PVC material. It should be noted that PVC material has low density and light weight, resulting in a lightweight upper housing 100 and lower housing 300 supported by PVC, which can reduce transportation costs. Furthermore, PVC material is easy to mold under heating, eliminating the need for multiple processes such as shearing, stamping, bending, and welding, making manufacturing simple and quick, and reducing manufacturing costs.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A BMS protection component, characterized in that, The device includes an upper housing (100) and a lower housing (300), the upper housing (100) covering the lower housing (300), and a receiving cavity is formed between the upper housing (100) and the lower housing (300) for accommodating the battery management system; and both the upper housing (100) and the lower housing (300) are made of PVC material; The BMS protection assembly (10) also includes a bracket (500) for connecting the lower housing (300) and the mechanical frame; The upper housing (100) has a first positioning hole, the lower housing (300) has a second positioning hole, the bracket (500) has a third positioning hole, and the BMS protection assembly (10) also includes a fastener (700), which passes through the first positioning hole, the second positioning hole and the third positioning hole in sequence.

2. The BMS protection component according to claim 1, characterized in that, The wall thickness of the upper housing (100) ranges from 0.5 mm to 1 mm, and the wall thickness of the lower housing (300) ranges from 0.5 mm to 1 mm.

3. The BMS protection component according to claim 1, characterized in that, The upper shell (100) and the lower shell (300) are integrally formed.

4. The BMS protection component according to claim 1, characterized in that, There are four first positioning holes, which are respectively located at the four corners of the upper housing (100); the first positioning hole, the second positioning hole and the fastener (700) are all in one-to-one correspondence with the first positioning hole.

5. The BMS protection component according to claim 1, characterized in that, The bracket (500) includes a connecting plate (510) and two support plates (530), and the connecting plate (510) is connected to the lower housing (300). The two support plates (530) are respectively connected at an angle to the two opposite sides of the connecting plate (510) and are used to connect to the mechanical frame.

6. The BMS protection component according to claim 5, characterized in that, The support plate (530) includes a first support part (531), a second support part (535) and a connecting part (533) all connected to the connecting plate (510). The connecting part (533) connects the first support part (531) and the second support part (535), and the height dimension of the first support part (531) is lower than the height dimension of the second support part (535).

7. A battery pack, characterized in that, It includes the BMS protection component (10) and the battery management system as described in any one of claims 1 to 6, wherein the battery management system is located within the BMS protection component (10).

8. An electrical appliance, characterized in that, It includes the battery pack and the device body as described in claim 7, wherein the battery pack is electrically connected to the device body.

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