BMS shell, BMS assembly, battery pack and electric equipment

Abstract

The utility model provides a BMS shell, BMS subassembly, battery pack and electric equipment, BMS shell includes first shell and second shell, first shell and second shell are connected so as to form the installation cavity between first shell and second shell, first shell is equipped with a plurality of installation position, each installation position is located in the installation cavity, and the installation position is located in the installation cavity. And each mounting position is used for mounting a circuit board, so that a plurality of circuit boards can be mounted in the mounting cavity. According to the BMS shell and the battery pack, the circuit board can be mounted at different mounting positions according to the change of the battery cell module in the battery pack, so that the universality of the BMS shell and the corresponding BMS assembly is improved.

Description

Technical Field

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

[0002] The BMS (Battery Monitoring and Management System) component is mainly used to monitor, control, and manage various battery performance aspects to ensure safe, stable, and long-life operation of the battery.

[0003] In related technologies, each battery pack typically contains multiple cell modules, and each cell module includes multiple cells. The Battery Management System (BMS) assembly includes a BMS housing and a circuit board disposed within the BMS housing. Each BMS assembly is adapted to a specific battery pack so that the circuit board can monitor each cell module. Therefore, when the cell modules within the battery pack change, the circuit board and the corresponding BMS housing need to be redesigned, resulting in poor versatility of the BMS assembly. Utility Model Content

[0004] The embodiments of this utility model provide a BMS housing, a BMS component, a battery pack, and an electrical device, which can improve the technical problem of poor versatility of BMS components.

[0005] In a first aspect, embodiments of the present invention provide 1. a BMS housing, including a first housing and a second housing, the first housing and the second housing being connected to form a mounting cavity between the first housing and the second housing, the first housing having a plurality of mounting positions, each of the mounting positions being located within the mounting cavity, and each of the mounting positions being used to mount a circuit board, so that a plurality of the circuit boards can be mounted within the mounting cavity.

[0006] In some embodiments, the number of mounting cavities is multiple, and each mounting cavity is provided with at least one mounting position.

[0007] In some embodiments, the first housing includes a first sidewall having the mounting position, and the second housing includes:

[0008] A connecting portion, the connecting portion being connected to the first sidewall; and,

[0009] Multiple protrusions are provided on the side of the connecting portion away from the first sidewall. The inner surface of each protrusion forms the mounting cavity with the first sidewall. Each protrusion is also provided with a wiring hole that communicates with the mounting cavity for wiring of the circuit board inside the mounting cavity.

[0010] In some embodiments, the protrusion includes a second sidewall and an annular wall, the annular wall being connected to the second sidewall to form the mounting cavity between the first sidewall, the annular wall and the second sidewall;

[0011] The wiring hole is provided in at least one of the second sidewalls and the annular wall of the protruding portion.

[0012] In some embodiments, a plurality of the protrusions are arranged along a first direction, and at least some of the protrusions are provided with the wiring hole on each side along the first direction.

[0013] In some embodiments, the second housing is provided with a plurality of first connection structures, and the first connection structures are connected and fixed to the first housing;

[0014] The first connecting structure and the mounting cavity are alternately arranged.

[0015] In some embodiments, the BMS housing further includes a plurality of connectors disposed on the first housing and detachably connected to the first connection structure.

[0016] In some embodiments, the first housing and / or the second housing are provided with a second connection structure for mounting to the housing of the battery pack.

[0017] In some embodiments, the number of the second connection structures is multiple, and at least some of the second connection structures are arranged along the length direction of the BMS housing; and / or,

[0018] At least some of the mounting positions are arranged along the length of the BMS housing.

[0019] In some embodiments, the first housing includes:

[0020] A first sidewall, connected to the second housing, has the mounting position provided on the side of the first sidewall facing the second housing; and

[0021] The third sidewall is bent and connected to the first sidewall, and the third sidewall is provided with the second connecting structure.

[0022] In some embodiments, each mounting position is provided with a plurality of third connection structures, which are used to connect and fix to the circuit board.

[0023] In some embodiments, the third connection structure includes a protrusion, the free end of which is provided with a first latch for attaching the circuit board to the free end of the protrusion.

[0024] Thirdly, embodiments of this utility model provide a BMS component, including:

[0025] BMS housing as described in any of the above; and,

[0026] At least two circuit boards, each of which is mounted in a different mounting position.

[0027] In some embodiments, at least one of the circuit boards is provided with a pressure sampling interface and a communication interface. The pressure sampling interface is used to electrically connect with the pressure sampling line of the battery pack to detect the parameter information of the battery cell module of the battery pack. The communication interface is used to electrically connect with other circuit boards to communicate.

[0028] Thirdly, embodiments of this utility model provide a battery pack, comprising:

[0029] Box;

[0030] Battery cell module, wherein the battery cell module is disposed within the housing; and,

[0031] The BMS component, as described in any of the above, is disposed within the enclosure.

[0032] Fourthly, embodiments of the present invention provide an electrical device, including the battery pack described above.

[0033] The beneficial effects of the embodiments of this utility model are as follows:

[0034] In embodiments of this invention, multiple mounting positions are provided within the mounting cavity, allowing different mounting positions to be selected for circuit board installation based on the actual situation of the battery cell module. For example, when the number of battery cell modules changes, different numbers of mounting positions can be selected to install different numbers of circuit boards, thus ensuring that the number of battery cell modules matches the number of circuit boards. Alternatively, when the size of the battery cell module changes, different mounting positions can be selected to install circuit boards, ensuring that the position of the circuit boards matches the position of the battery cell modules. This allows the BMS housing to be suitable for different battery packs, ultimately improving the technical problem of poor versatility of BMS components. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the BMS component provided in an embodiment of the present invention.

[0037] Figure 2 for Figure 1 The BMS component shown is a cross-sectional view along the AA direction.

[0038] Figure 3 for Figure 1 A 3D view of the BMS components shown.

[0039] Figure 4 for Figure 3 The exploded view of the BMS components shown.

[0040] Figure 5 for Figure 4 The diagram shows the structure of the second housing of the BMS component.

[0041] Figure 6 for Figure 4 A magnified view of the area at point X in the image.

[0042] Figure 7 for Figure 4 The diagram shows the structure of the circuit board for the BMS component.

[0043] The labels in the diagram are as follows:

[0044] 100. First shell;

[0045] 11. First sidewall; 111. Mounting position; 112. Third connecting structure; 1121. Protruding post; 1122. First buckle; 12. Third sidewall; 121. Second connecting structure;

[0046] 200. Second shell;

[0047] 21. Connecting part; 211. First connecting structure; 22. Outward protrusion; 221. Second side wall; 222. Annular wall; 223. Mounting cavity; 224. Wiring hole;

[0048] 300. Circuit board; 31. Pressure sampling interface; 32. Communication interface;

[0049] 400. Connectors. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0051] The BMS (Battery Monitoring and Management System) component is mainly used to monitor, control, and manage various battery performance aspects to ensure safe, stable, and long-life operation of the battery.

[0052] In related technologies, each battery pack typically contains multiple cell modules, and each cell module includes multiple cells. The Battery Management System (BMS) assembly includes a BMS housing and a circuit board disposed within the BMS housing. Each BMS assembly is adapted to a specific battery pack so that the circuit board can monitor each cell module. Therefore, when the cell modules within the battery pack change, the circuit board and the corresponding BMS housing need to be redesigned, resulting in poor versatility of the BMS assembly.

[0053] Based on this, please refer to Figure 1 and Figure 2 This application provides a BMS housing. The BMS housing includes a first housing 100 and a second housing 200. The first housing 100 and the second housing 200 are connected to form a mounting cavity 223 between the first housing 100 and the second housing 200. The first housing 100 is provided with a plurality of mounting positions 111, each mounting position 111 being located within the mounting cavity 223, and each mounting position 111 being used to mount a circuit board 300, so that a plurality of circuit boards 300 can be mounted within the mounting cavity 223.

[0054] In this embodiment, multiple mounting positions 111 are provided within the mounting cavity 223. Therefore, different mounting positions 111 can be selected to mount the circuit board 300 according to the actual situation of the battery cell module. For example, when the number of battery cell modules changes, different numbers of mounting positions 111 can be selected to mount different numbers of circuit boards 300, thereby making the number of battery cell modules compatible with the number of circuit boards 300; or, when the size of the battery cell module changes, different mounting positions 111 can be selected to mount the circuit board 300, so that the position of the circuit board 300 is compatible with the position of the battery cell module. This allows the BMS housing to be suitable for different battery packs, ultimately improving the technical problem of poor versatility of BMS components.

[0055] The above is an overall description of the technical solutions of the embodiments of this application.

[0056] In some embodiments, there are multiple mounting cavities 223, and each mounting cavity 223 is provided with at least one mounting position 111.

[0057] Furthermore, different mounting cavities 223 can provide better protection for the circuit boards 300 on different mounting positions 111. Of course, placing different circuit boards 300 in different mounting cavities 223 can also avoid interference between different circuit boards 300 (such as electromagnetic interference), and can also avoid wiring confusion caused by too many circuit boards 300 in the same mounting cavity 223.

[0058] For example, please continue to refer to Figure 3 The first housing 100 includes a first sidewall 11 with a mounting position 111, and the second housing 200 includes a connecting portion 21 and a plurality of protrusions 22. The connecting portion 21 is connected to the first sidewall 11. The protrusions 22 protrude from the connecting portion 21 on the side opposite to the first sidewall 11, and the inner surface of each protrusion 22 forms a mounting cavity 223 between itself and the first sidewall 11.

[0059] In some embodiments, adjacent protrusions 22 are spaced apart. This spacing between adjacent protrusions 22 facilitates the assembly, wiring, and other processes of the BMS components.

[0060] Please continue to refer to this. Figure 4 and Figure 5 In some embodiments, the protrusion 22 may include a second sidewall 221 and an annular wall 222, the annular wall 222 being connected around the second sidewall 221 to form a mounting cavity 223 between the first sidewall 11, the annular wall 222 and the second sidewall 221.

[0061] Thus, the circuit board 300 can be installed in the mounting position 111, and then the second housing 200 is connected to the first housing 100 so that the protrusion 22 can cover the mounting position 111 and the circuit board 300 on the mounting position 111, thereby making the assembly of the BMS component simpler.

[0062] In some embodiments, the second housing 200 may be a plastic part. For example, the second housing 200 may be a vacuum-formed part formed by a vacuum forming process. Of course, the second housing 200 may also be formed by a blow molding or injection molding process, and this application embodiment does not limit this.

[0063] In some embodiments, the first housing 100 and / or the second housing 200 are provided with wiring holes 224, which communicate with the mounting cavity 223 for wiring of the circuit board 300 in the mounting cavity 223.

[0064] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that there can be three kinds of relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0065] In other words, the first housing 100 may have a wiring hole 224 and the second housing 200 may not have a wiring hole 224, or the second housing 200 may have a wiring hole 224 and the first housing 100 may not have a wiring hole 224, or both the first housing 100 and the second housing 200 may have a wiring hole 224. This application embodiment does not limit this.

[0066] For example, if the second housing 200 is provided with a wiring hole 224, the wiring hole 224 can be provided on the outward protrusion 22.

[0067] In some embodiments, at least one of the second sidewalls 221 and the annular wall 222 of the protrusion 22 is provided with wiring holes 224. Therefore, the circuit board 300 in the mounting cavity 223 can be easily wired from different positions and angles of the protrusion 22 according to actual needs.

[0068] For example, after the BMS housing is installed into the battery pack casing, on the one hand, the protrusion 22 is located on the side of the first sidewall 11 facing the cell module, so the second sidewall 221 of the protrusion 22 also faces the cell module, so that the circuit board 300 in the mounting cavity 223 can be directly electrically connected to the voltage sampling line of the cell module through the wiring hole 224 at the second sidewall 221 to monitor the corresponding cell module. On the other hand, the circuit boards 300 in adjacent mounting cavities 223 can be electrically connected through the wiring hole 224 on the ring wall 222 to achieve communication. It should be noted that the circuit boards 300 in adjacent mounting cavities 223 can be directly connected by a single cable, or different circuit boards 300 can be connected to a sub-cable, and all sub-cables can be connected to a main cable to achieve connection. This application embodiment does not limit this.

[0069] In some embodiments, a plurality of protrusions 22 are arranged along a first direction H1, and at least some of the protrusions 22 are provided with wiring holes 224 on each side of the first direction H1. Therefore, the circuit board 300 in the mounting cavity 223 can be easily wired from different positions of the protrusions 22 according to actual needs.

[0070] For example, along the first direction H1, each protrusion 22 has a wiring hole 224 on the side facing the adjacent protrusion 22.

[0071] The first direction H1 can be the length direction of the BMS housing, thereby making full use of the space along the length of the BMS housing to accommodate more circuit boards. Of course, the first direction H1 can also be the width direction of the BMS circuit board 300, etc., and this application embodiment does not limit it in this way.

[0072] In some embodiments, the second housing 200 is provided with a plurality of first connecting structures 211, which are connected and fixed to the first housing 100. Thus, the second housing 200 can form multiple connections with the first housing 100 through the plurality of first connecting structures 211, thereby improving the stability and reliability of the installation of the second housing 200.

[0073] In some embodiments, the first connecting structure 211 and the mounting cavity 223 are alternately spaced. For example, the first connecting structure 211 and the protrusion 22 may be alternately spaced along a first direction H1, thereby ensuring that each protrusion 22 is stably and reliably connected to the first housing 100.

[0074] Please continue to refer to this. Figure 6In some embodiments, the BMS housing also includes multiple connectors 400, which are disposed on the first housing 100 and are detachably connected to the first connection structure 211. This allows for easy disassembly of the second housing 200 to reinstall the circuit board 300 according to the actual situation of the battery module.

[0075] For example, the connector 400 may include a second snap-fit, and correspondingly, the first connecting structure 211 includes a first snap-fit ​​hole so that the connector 400 can snap into the first snap-fit ​​hole. Of course, the connector 400 may also be a first threaded connector, and the first connecting structure 211 may be a threaded hole so that the connector 400 can be threadedly connected to the first connecting structure 211. This application embodiment does not limit this.

[0076] In some embodiments, the connector 400 and the first housing 100 are detachably connected to facilitate the replacement and maintenance of components such as the connector 400 and the first housing 100.

[0077] For example, the connector 400 passes through the first housing 100. The connector 400 can be the second snap-fit ​​or the first threaded connector described above.

[0078] In some embodiments, the first housing 100 and / or the second housing 200 are provided with a second connection structure 121 for mounting to the housing of the battery pack.

[0079] Therefore, during the battery pack production process, the BMS housing and circuit board 300 can be assembled into a BMS assembly for feeding. Then, the BMS assembly can be directly installed into the battery pack housing through the first connecting part 21. There is no need to set up an additional BMS bracket to install the BMS housing into the battery pack housing, which can reduce the BMS bracket required for the battery pack, thereby reducing the material cost and installation process of the battery pack, making the battery pack more suitable for mass industrial production.

[0080] In some embodiments, there are multiple second connection structures 121, and at least some of the second connection structures 121 are arranged along the length direction of the BMS housing, so that each position of the BMS housing in the length direction can be effectively fixed.

[0081] In some embodiments, at least some of the mounting positions 111 are arranged along the length of the BMS housing, thereby making full use of the space along the length of the BMS housing to provide more mounting positions 111. Of course, when at least some of the second connection structures 121 are also arranged along the length of the BMS housing, each mounting position 111 can be stably and reliably mounted to the battery pack housing.

[0082] For example, the second connection structure 121 may include a mounting hole, which may be a threaded hole, to facilitate bolting to the battery pack housing.

[0083] In some embodiments, the first housing 100 includes a first sidewall 11 and a third sidewall 12. The first sidewall 11 is connected to the second housing 200, and a mounting position 111 is provided on the side of the first sidewall 11 facing the second housing 200. The third sidewall 12 is bent and connected to the first sidewall 11, and a second connecting structure 121 is provided on the third sidewall 12.

[0084] In actual use, the first housing 100 can be installed on the bottom wall of the battery pack via the third side wall 12, so that the mounting position 111 at the first side wall 11 faces the battery cell module of the battery pack, thereby facilitating the circuit board 300 on the mounting position 111 to also face the battery cell module, so that the layout inside the battery pack is more reasonable.

[0085] In some embodiments, the first housing 100 may be a plastic part, such as a vacuum-formed part formed by a vacuum forming process. Of course, the first housing 100 may also be formed by a blow molding or injection molding process, and this application embodiment does not limit this.

[0086] In some embodiments, each mounting position 111 is provided with a plurality of third connection structures 112, which are used to connect and fix with the circuit board 300. Thus, multiple connections and fixations can be formed between the multiple third connection structures 112 and each circuit board 300 to improve the stability and reliability of the installation of the circuit board 300.

[0087] In some embodiments, each mounting position 111 may be provided with four third connection structures 112, which are arranged in a rectangle so that they can be connected to the four corners of the circuit board 300.

[0088] In some embodiments, the third connection structure 112 is detachably connected to the circuit board 300 to facilitate the replacement of the circuit board 300.

[0089] For example, the third connection structure 112 may include a protrusion 1121, the free end of which is provided with a first latch 1122 for attaching the circuit board 300 to the free end of the protrusion 1121.

[0090] This application also provides a BMS component, including the BMS housing as described above.

[0091] In some embodiments, the BMS component also includes at least two circuit boards 300, each of which is mounted in a different mounting position 111.

[0092] For example, at least two circuit boards 300 may include a main control circuit board and at least one pressure sampling circuit board. The pressure sampling circuit board is electrically connected to the pressure sampling line of the battery pack to detect parameter information of the battery cell modules. The main control circuit board is electrically connected to the pressure sampling circuit board for processing the parameter information of the battery cell modules.

[0093] Therefore, when the number of battery cell modules changes, different numbers of mounting positions 111 can be selected to install different numbers of voltage sampling circuit boards, so that the number of battery cell modules matches the number of voltage sampling circuit boards; or, when the size of the battery cell module changes, different mounting positions 111 can be selected to install voltage sampling circuit boards, so that the position of the voltage sampling circuit boards matches the position of the battery cell modules, so that the BMS housing can be used for battery packs with different numbers of battery cell modules, ultimately improving the technical problem of poor versatility of BMS components.

[0094] For example, please continue to refer to Figure 7 At least one circuit board 300 (such as a pressure sampling circuit board) is provided with a pressure sampling interface 31 and a communication interface 32. The pressure sampling interface 31 is used to electrically connect with the pressure sampling line of the battery pack to detect the parameter information of the battery cell module of the battery pack. The communication interface 32 is used to electrically connect with other circuit boards 300 to communicate.

[0095] This application embodiment also provides a battery pack, which includes a housing, battery cell modules, and a BMS assembly. The battery cell modules are disposed within the housing. The BMS assembly is the BMS assembly described above, and is disposed within the housing.

[0096] This application also provides an electrical device, which may include the battery pack described above.

[0097] Electrical equipment can include, but is not limited to, vehicles, smart wearable devices, mobile terminals, home appliances, and medical devices; this application does not limit the scope of these categories. Vehicles include, but are not limited to, cars, buses, trains, ships, and aircraft. Smart wearable devices include, but are not limited to, smartwatches, smart bracelets, and neck massagers. Mobile terminals include, but are not limited to, smartphones, laptops, tablets, and POS (point-of-sale) terminals. Home appliances include, but are not limited to, televisions, washing machines, air conditioners, rice cookers, smart robot vacuums, and smart lights. Medical devices include, but are not limited to, infrared electronic thermometers, pulse oximeters, and body composition analyzers.

[0098] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A BMS housing, characterized in that, The device includes a first housing and a second housing, which are connected to form a mounting cavity between the first housing and the second housing. The first housing has a plurality of mounting positions, each of which is located within the mounting cavity and is used to mount a circuit board, so that a plurality of circuit boards can be mounted within the mounting cavity.

2. The BMS housing according to claim 1, characterized in that, The number of mounting cavities is multiple, and each mounting cavity is provided with at least one mounting position.

3. The BMS housing according to claim 2, characterized in that, The first housing includes a first sidewall having the mounting position, and the second housing includes: A connecting portion, the connecting portion being connected to the first sidewall; and, Multiple protrusions are provided on the side of the connecting portion away from the first sidewall. The inner surface of each protrusion forms the mounting cavity with the first sidewall. Each protrusion is also provided with a wiring hole that communicates with the mounting cavity for wiring of the circuit board inside the mounting cavity.

4. The BMS housing according to claim 3, characterized in that, The protruding portion includes a second sidewall and an annular wall, the annular wall being connected to the second sidewall to form the mounting cavity between the first sidewall, the annular wall and the second sidewall; The wiring hole is provided in at least one of the second sidewalls and the annular wall of the protruding portion.

5. The BMS housing according to claim 3, characterized in that, The plurality of the protrusions are arranged along a first direction, and at least some of the protrusions are provided with the wiring hole on each side along the first direction.

6. The BMS housing according to claim 2, characterized in that, The second housing is provided with a plurality of first connecting structures, and the first connecting structures are connected and fixed to the first housing; The first connecting structure and the mounting cavity are alternately arranged.

7. The BMS housing according to claim 6, characterized in that, The BMS housing also includes a plurality of connectors, which are disposed on the first housing and are detachably connected to the first connection structure.

8. The BMS housing according to claim 1, characterized in that, The first housing and / or the second housing are provided with a second connection structure for mounting to the battery pack housing.

9. The BMS housing according to claim 8, characterized in that, The number of the second connection structures is multiple, and at least some of the second connection structures are arranged along the length direction of the BMS housing; and / or, At least some of the mounting positions are arranged along the length of the BMS housing.

10. The BMS housing according to claim 8, characterized in that, The first housing includes: A first sidewall, connected to the second housing, has the mounting position provided on the side of the first sidewall facing the second housing; and The third sidewall is bent and connected to the first sidewall, and the third sidewall is provided with the second connecting structure.

11. The BMS housing according to any one of claims 1 to 10, characterized in that, Each of the mounting positions is provided with a plurality of third connection structures, which are used to connect and fix to the circuit board.

12. The BMS housing according to claim 11, characterized in that, The third connection structure includes a protrusion, and the free end of the protrusion is provided with a first buckle for snapping the circuit board to the free end of the protrusion.

13. A BMS component, characterized in that, include: BMS housing as described in any one of claims 1 to 12; and, At least two circuit boards, each of which is mounted in a different mounting position.

14. The BMS component according to claim 13, characterized in that, At least one of the circuit boards is provided with a pressure sampling interface and a communication interface. The pressure sampling interface is used to electrically connect with the pressure sampling line of the battery pack to detect the parameter information of the cell module of the battery pack. The communication interface is used to electrically connect with other circuit boards to communicate.

15. A battery pack, characterized in that, include: Box; A battery cell module, wherein the battery cell module is disposed within the housing; and, The BMS component as described in claim 13 or 14, wherein the BMS component is disposed within the housing.

16. An electrical appliance, characterized in that, Includes the battery pack as described in claim 15.

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