BMU mounting assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a BMU (battery management unit) mounting assembly and a battery pack, and aims to solve the problem that a BMU in an existing battery pack occupies a large space due to the increase of battery cells. Therefore, the BMU mounting assembly comprises a fixed plate and a bracket, wherein a mounting groove is formed in the fixed plate, and a first BMU is mounted in the mounting groove; the support comprises a mounting plate and supporting legs arranged on the side, facing the fixing plate, of the mounting plate, the mounting plate is erected above the mounting groove, the supporting legs are connected with the fixing plate, a first fixing part is arranged on the side, back to the fixing plate, of the mounting plate, and a second BMU is fixed to the first fixing part. According to the utility model, the first BMU and the second BMU are respectively arranged on the fixed plate and the bracket, so that the stacked installation of the first BMU and the second BMU is realized, the space occupied by the BMU in the battery pack is obviously reduced, and the integration level of the battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically providing a BMU mounting assembly and battery pack. Background Technology

[0002] With the accelerated transformation of the global energy structure and the large-scale integration of renewable energy, energy storage technology, as a key means to balance energy supply and demand and improve energy utilization efficiency, is ushering in tremendous development opportunities. Electrochemical energy storage, with its significant advantages such as fast response speed and flexible configuration, has become a research focus in the energy storage field. As the core component of electrochemical energy storage systems, the battery management system (BMS) undertakes important responsibilities such as battery state monitoring, equalization control, and safety protection, and its performance plays a decisive role in the overall efficiency and safety of the energy storage system.

[0003] In energy storage battery pack design, the Battery Management Unit (BMU) is the fundamental unit for data acquisition and monitoring in the Battery Management System (BMS), responsible for collecting key parameters such as cell voltage and temperature. However, with the increasing energy density requirements of energy storage systems, the number of cells within the battery pack has increased dramatically, making it difficult for a single BMU to meet practical needs in terms of the number of acquisition channels.

[0004] To address this issue, some manufacturers have adopted solutions such as dual BMU integration or customized enlarged BMUs. Dual BMU integration involves combining two BMUs onto a single panel for data acquisition, while customized enlarged BMUs integrate a single, larger BMU onto the panel. While these methods alleviate the data acquisition burden to some extent, new problems arise. The integration of dual or enlarged BMUs occupies more panel space, posing significant challenges to layout design given the limited internal space of the battery pack. This not only increases system complexity but also raises costs.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0006] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the BMU in the existing battery pack occupies a large space due to the increase in the number of battery cells.

[0007] In a first aspect, the present invention provides a BMU mounting assembly, comprising:

[0008] A fixing plate is provided with a mounting groove, in which a first BMU is installed;

[0009] The bracket includes a mounting plate and a support leg disposed on the side of the mounting plate facing the fixed plate. The mounting plate is mounted above the mounting groove, and the support leg is connected to the fixed plate. A first fixing member is disposed on the side of the mounting plate facing away from the fixed plate, and a second BMU is fixed on the first fixing member.

[0010] In the preferred embodiment of the BMU mounting assembly described above, the mounting plate is provided with multiple heat dissipation vents, which are spaced apart on the mounting plate to dissipate heat from the first BMU and the second BMU.

[0011] In the preferred embodiment of the BMU mounting assembly described above, a second fixing member is provided at the end of the mounting plate. The second fixing member is used to fix the wiring harness of the second BMU on the side of the mounting plate facing away from the fixing plate.

[0012] In the preferred embodiment of the BMU mounting assembly described above, the second fastener is a cable tie hole provided on the mounting plate, which allows cable ties to be used to secure the wiring harness of the second BMU to the mounting plate.

[0013] In the preferred embodiment of the BMU mounting assembly described above, the mounting plate has a rectangular structure, and the two long sides of the mounting plate are bent toward the mounting groove to form a first flange and a second flange, respectively.

[0014] In the preferred embodiment of the BMU mounting assembly described above, the mounting groove has a rectangular structure, and the width of the mounting plate is smaller than the width of the mounting groove. One long side of the mounting plate is flush with one long side of the mounting groove. The first flange is located on the long side of the mounting plate that is flush with one long side of the mounting groove, and the second flange is located on the long side of the mounting plate on the other side. The width of the first flange is greater than the width of the second flange.

[0015] In the preferred embodiment of the BMU mounting assembly described above, the mounting plate has a mounting port, which is used to install at least one of the following: an interface for a wiring harness connected to the first BMU, an interface for a wiring harness connected to the second BMU, and an explosion-proof valve.

[0016] In the preferred embodiment of the BMU mounting assembly described above, the first fixing member consists of a plurality of studs spaced apart on the mounting plate, and the second BMU has a connecting hole corresponding to each stud, with the studs passing through the connecting hole to fix the second BMU in place.

[0017] In the preferred embodiment of the BMU mounting assembly described above, multiple support legs are provided, and the multiple support legs are spaced apart on the side of the mounting plate facing the fixing plate.

[0018] In a second aspect, the present invention also provides a battery pack, the battery pack including a housing and a BMU mounting assembly as described above, the BMU mounting assembly being installed in the housing.

[0019] Those skilled in the art will understand that this utility model provides a BMU mounting assembly, including a mounting plate and a bracket. The mounting plate has a mounting groove in which a first BMU is mounted. The bracket includes a mounting plate and a support leg disposed on the side of the mounting plate facing the mounting plate. The mounting plate is supported above the mounting groove, and the support leg is connected to the mounting plate. A first fixing member is disposed on the side of the mounting plate facing away from the mounting plate, and a second BMU is fixed to the first fixing member. This design reduces the space occupied by the BMU in the battery pack. Specifically, the mounting plate and bracket enable the stacked installation of the first and second BMUs. This stacked installation significantly reduces the space occupied by the BMU in the battery pack and improves the integration of the battery pack.

[0020] Furthermore, the mounting plate of this invention has multiple heat dissipation vents, which are spaced apart on the mounting plate to dissipate heat from the BMU. This structural design avoids localized overheating of the first and second BMUs, thereby effectively reducing the operating temperature of the first and second BMUs and minimizing performance degradation or damage caused by overheating.

[0021] Furthermore, the mounting plate of this invention is provided with a second fixing member at its end. The fixing member is used to fix the wiring harness of the second BMU on the side of the mounting plate facing away from the fixing plate. Through this structural design, it can be ensured that the wiring harness of the second BMU will not loosen or fall off under vibration, movement or external force, thereby improving the stability and reliability of the wiring harness fixing. Attached Figure Description

[0022] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a structural schematic diagram of the BMU mounting assembly of this utility model;

[0024] Figure 2 This is an exploded view of the BMU mounting assembly of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the fixing plate of this utility model. Figure 1 ;

[0026] Figure 4 This is a schematic diagram of the structure of the fixing plate of this utility model. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the structure of the bracket of this utility model. Figure 1 ;

[0028] Figure 6 This is a schematic diagram of the structure of the bracket of this utility model. Figure 2 .

[0029] List of reference numerals in the attached diagram:

[0030] 100, First BMU; 200, Second BMU;

[0031] 1. Fixing plate; 11. Mounting slot; 12. Mounting port;

[0032] 2. Bracket; 21. Mounting plate; 22. Support leg; 23. First fixing component; 24. Heat dissipation vent; 25. Second fixing component; 26. First flange; 27. Second flange. Detailed Implementation

[0033] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the following embodiments are described in conjunction with a battery management unit, the BMU mounting assembly provided by the present invention is also applicable to other products that need to address the problem of large space occupation.

[0034] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Based on the problems pointed out in the background art, such as insufficient data collection by the BMU in existing battery packs due to the increase in the number of cells, and the large space occupied by existing capacity expansion solutions, this utility model provides a BMU mounting assembly and battery pack, which aims to effectively solve the problem of large space occupied by BMU by stacking BMUs through mounting brackets.

[0036] like Figures 1 to 6 As shown, this utility model provides a BMU mounting assembly, including a fixing plate 1 and a bracket 2. The fixing plate 1 has a mounting groove 11 in which a first BMU 100 is mounted. The bracket 2 includes a mounting plate 21 and a support leg 22 disposed on the side of the mounting plate 21 facing the fixing plate 1. The mounting plate 21 is mounted above the mounting groove 11, and the support leg 22 is connected to the fixing plate 1. A first fixing member 23 is disposed on the side of the mounting plate 21 facing away from the fixing plate 1, and a second BMU 200 is fixed to the first fixing member 23.

[0037] The mounting plate 1 is the base part of the mounting bracket 2, and a mounting groove 11 is provided on it. The mounting groove 11 is used to accommodate and fix the first BMU100, thereby ensuring its stable position in the battery pack.

[0038] For example, the mounting groove 11 of this utility model is provided with a plurality of bolts spaced apart, and the first BMU100 is provided with through holes corresponding to the plurality of bolts. When it is necessary to fix the first BMU100, the first BMU100 is placed in the mounting groove 11, the bolts are passed through the through holes, and then nuts are screwed onto the bolts to fix the first BMU100 in the mounting groove 11.

[0039] It should be noted that in other embodiments, the first BMU100 can also be fixed in the mounting groove 11 by means of clips, adhesives, or welding. This invention does not limit the specific fixing method of the first BMU100, as long as it can securely fix the first BMU100 in the mounting groove 11.

[0040] The bracket 2 of this utility model includes a mounting plate 21 and support legs 22. The mounting plate 21 is mounted above the mounting groove 11 of the fixing plate 1, forming the basis of the stacked structure. The support legs 22 are connected to the fixing plate 1, providing support for the mounting plate 21 and ensuring the stability of the entire bracket 2. A first fixing member 23 is provided on the side of the mounting plate 21 facing away from the fixing plate 1 (i.e., the side away from the support legs 22) for fixing the second BMU200.

[0041] Therefore, this utility model realizes the stacking and installation of the first BMU100 and the second BMU200 through the fixing plate 1 and the bracket 2, which significantly reduces the space occupied by the BMU in the battery pack and improves the integration of the battery pack.

[0042] Preferably, such as Figure 5 and Figure 6 As shown, the first fixing member 23 consists of multiple studs spaced apart on the mounting plate 21. The second BMU200 has connecting holes corresponding to the multiple studs, and the studs pass through the connecting holes to fix the second BMU200.

[0043] The stud is a columnar structure mounted on the mounting plate 21, with threads at one end for engagement with a nut for fastening. The connecting hole is a hole on the second BMU200, the size and position of which match the stud to ensure smooth insertion. The nut engages with the threads on the stud; by tightening the nut, the second BMU200 can be pressed firmly onto the mounting plate 21 for fixation.

[0044] Furthermore, the spaced studs ensure that the second BMU200 receives a uniform tightening force on the mounting plate 21, preventing excessive or insufficient localized stress. In addition, the stud and nut design makes installation and removal relatively simple and quick, requiring no complex tools or operations. When maintenance or replacement of the second BMU200 is needed, the nut can be easily tightened to remove it from the mounting plate 21.

[0045] Preferably, such as Figure 2 , Figure 5 and Figure 6 As shown, multiple support legs 22 are provided, and the multiple support legs 22 are spaced apart on the side of the mounting plate 21 facing the fixing plate 1.

[0046] Compared to a single outrigger 22, multiple outriggers 22 can provide a wider range of support points, thereby distributing the weight and reducing the pressure on each outrigger 22. The spacing between the outriggers 22 makes the weight distribution more even, avoiding the problem of excessive local stress caused by the outriggers 22 being too concentrated.

[0047] For example, the end of the support leg 22 of this utility model is provided with a through hole, and the fixing plate 1 is also provided with a corresponding through hole. The bolt can pass through the through holes on the support leg 22 and the fixing plate 1 in sequence to connect the support leg 22 and the fixing plate 1.

[0048] It should be noted that in other embodiments, the support leg 22 can also be connected to the fixing plate 1 by means of snap-fit, welding, etc. This utility model does not specifically limit the connection method between the support leg 22 and the fixing plate 1, as long as the connection between the support leg 22 and the fixing plate 1 can be guaranteed to be firm.

[0049] Preferably, the fixing plate 1 and the bracket 2 are made of cold-rolled steel.

[0050] Cold-rolled steel is a type of steel processed by cold rolling, characterized by a smooth surface, high dimensional accuracy, and excellent mechanical properties. The high strength and hardness of cold-rolled steel enable the mounting plate 1 and bracket 2 to withstand significant weight and vibration, ensuring stable installation of the battery management system (BMS) and improving the durability and reliability of the mounting plate 1 and bracket 2, thus extending their service life.

[0051] Preferably, such as Figure 3 and Figure 4 As shown, the fixing plate 1 has an installation port 12, which is used to install the interface of the wire harness connected to the first BMU100 and the interface of the wire harness connected to the second BMU200.

[0052] Mounting port 12 can provide mounting space for the wire harness interface connected to the first BMU100 and the wire harness interface connected to the second BMU200, making the wire harness connection neater and more orderly. As a result, the fixing plate 1 can make full use of its surface space, which helps to reduce the overall size of the battery pack and improve space utilization.

[0053] In another embodiment, the mounting port 12 can also provide installation space for the explosion-proof valve, thereby enabling a more compact spatial layout for the battery pack, further reducing the overall size of the battery pack and improving space utilization.

[0054] Preferably, such as Figure 5 and Figure 6 As shown, the mounting plate 21 has multiple heat dissipation holes 24, which are spaced apart on the mounting plate 21 to dissipate heat from the first BMU100 and the second BMU200.

[0055] This invention features multiple heat dissipation vents 24 spaced apart on the mounting plate 21. The arrangement of these vents 24 increases the airflow area, allowing more heat to be carried away by the air. Furthermore, the spaced distribution design ensures that air flows evenly through the first BMU100 and the second BMU200, avoiding localized overheating. This effectively reduces the operating temperature of the first BMU100 and the second BMU200, minimizing performance degradation or damage caused by overheating.

[0056] Preferably, such as Figure 5 and Figure 6 As shown, a second fixing member 25 is provided at the end of the mounting plate 21. The second fixing member 25 is used to fix the wiring harness of the second BMU200 on the side of the mounting plate 21 facing away from the fixing plate 1.

[0057] By fixing the wire harness to the mounting plate 21 with the second fastener 25, it is possible to effectively prevent the wire harness from loosening due to vibration or movement, ensuring the stability of signal transmission. Furthermore, the fixed wire harness is not easily damaged by external forces, thus improving the durability and reliability of the wire harness.

[0058] Preferably, the second fastener 25 is a cable tie hole provided on the mounting plate 21, so as to allow the cable tie to pass through the cable tie hole to bind and fix the wire harness of the second BMU200 to the mounting plate 21.

[0059] The cable tie holes are specially designed openings on the mounting plate 21, their size and shape matching commonly used cable ties, allowing the cable ties to pass through and secure the wire harness. By passing the cable ties through the cable tie holes, the wire harness is tightly bound to the mounting plate 21, ensuring that the wire harness will not loosen or fall off under vibration, movement, or external force, thus improving the stability and reliability of the wire harness fixation. This structural design also facilitates the maintenance and management of the wire harness; if it is necessary to replace the wire harness or perform other maintenance work, simply loosen the cable ties, making the operation simple and quick.

[0060] Preferably, such as Figure 5 and Figure 6 As shown, the mounting plate 21 has a rectangular structure, and the two long sides of the mounting plate 21 are bent toward the mounting groove 11 to form a first flange 26 and a second flange 27.

[0061] The design of the first flange 26 and the second flange 27 is equivalent to adding reinforcing ribs to both sides of the mounting plate 21, significantly improving the overall strength and rigidity of the mounting plate 21. This makes the mounting plate 21 more stable when bearing the weight and vibration of the second BMU200, reducing the risk of deformation and damage.

[0062] Preferably, the mounting groove 11 has a rectangular structure, and the width of the mounting plate 21 is smaller than the width of the mounting groove 11. One long side of the mounting plate 21 is flush with one long side of the mounting groove 11. The first flange 26 is located on the long side of the mounting plate 21 that is flush with one long side of the mounting groove 11, and the second flange 27 is located on the long side of the mounting plate 21 on the other side. The width of the first flange 26 is greater than the width of the second flange 27.

[0063] The first flange 26 is wider, providing stronger support and ensuring that the mounting plate 21 has high overall strength and rigidity; the second flange 27 is narrower, providing space for the installation of the first BMU100, ensuring that the BMU can be installed smoothly without interference.

[0064] In addition, this utility model also provides a battery pack (not shown in the figure), which includes a housing and the BMU mounting assembly described in any of the above embodiments, wherein the BMU mounting assembly is installed in the housing.

[0065] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A BMU mounting assembly, characterized in that, include: A fixing plate (1) is provided with a mounting groove (11), and a first BMU (100) is installed in the mounting groove (11); The bracket (2) includes a mounting plate (21) and a support leg (22) disposed on the side of the mounting plate (21) facing the fixing plate (1). The mounting plate (21) is mounted above the mounting groove (11). The support leg (22) is connected to the fixing plate (1). A first fixing member (23) is disposed on the side of the mounting plate (21) facing away from the fixing plate (1). A second BMU (200) is fixed on the first fixing member (23).

2. The BMU mounting assembly according to claim 1, characterized in that, The mounting plate (21) has a plurality of heat dissipation vents (24), which are spaced apart on the mounting plate (21) to dissipate heat from the first BMU (100) and the second BMU (200).

3. The BMU mounting assembly according to claim 1, characterized in that, The end of the mounting plate (21) is provided with a second fixing member (25), which is used to fix the wiring harness of the second BMU (200) on the side of the mounting plate (21) facing away from the fixing plate (1).

4. The BMU mounting assembly according to claim 3, characterized in that, The second fastener (25) is a cable tie hole on the mounting plate (21) to allow cable ties to be used to secure the wire harness of the second BMU (200) to the mounting plate (21) through the cable tie hole.

5. The BMU mounting assembly according to claim 1, characterized in that, The mounting plate (21) has a rectangular structure, and the two long sides of the mounting plate (21) are bent toward the mounting groove (11) to form a first flange (26) and a second flange (27).

6. The BMU mounting assembly according to claim 5, characterized in that, The mounting groove (11) has a rectangular structure, and the width of the mounting plate (21) is smaller than the width of the mounting groove (11). One long side of the mounting plate (21) is flush with one long side of the mounting groove (11). The first flange (26) is located on the long side of the mounting plate (21) that is flush with one long side of the mounting groove (11). The second flange (27) is located on the long side of the mounting plate (21) on the other side. The width of the first flange (26) is greater than the width of the second flange (27).

7. The BMU mounting assembly according to claim 1, characterized in that, The fixing plate (1) has an installation port (12), which is used to install at least one of the following: the interface of the wire harness connected to the first BMU (100), the interface of the wire harness connected to the second BMU (200), or the explosion-proof valve.

8. The BMU mounting assembly according to claim 1, characterized in that, The first fixing member (23) consists of a plurality of studs spaced apart on the mounting plate (21). The second BMU (200) has a connecting hole corresponding to each stud, and the stud passes through the connecting hole to fix the second BMU (200).

9. The BMU mounting assembly according to any one of claims 1 to 8, characterized in that, Multiple support legs (22) are provided, and the multiple support legs (22) are spaced apart on the side of the mounting plate (21) facing the fixing plate (1).

10. A battery pack, characterized in that, The device includes a housing and a BMU mounting assembly as described in any one of claims 1 to 9, wherein the BMU mounting assembly is mounted in the housing.

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