Battery pack and electric equipment

Abstract

The invention discloses a battery pack and electric equipment applying the battery pack. The battery pack comprises a battery box body, a BMS master-slave control support, a BMS double-slave control support and a BDU assembly, the master-slave control support and the double-slave control support are located on the two opposite sides, in the Y direction, of the BDU assembly, in the master-slave control support, a transversely-arranged master control is located above a vertically-arranged slave control, in the double-slave control support, the two vertically-arranged slave controls are arranged in a high-low staggered mode, and in the BDU assembly, the BMS master-slave control support and the BMS double-slave control support are located on the two opposite sides of the BDU assembly in the Y direction. Moreover, the master control and all slave control plugging ports are consistent and horizontally face the battery compartment along the length direction of the battery pack, so that the height space of the electrical compartment is fully utilized, the space utilization rate is improved, the energy density of the battery pack is improved, the plugging space of the wire harness is favorably expanded, and the operation convenience is improved.

Description

Technical Field

[0001] This invention belongs to the field of battery technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage systems, lithium battery packs, as core energy components, face increasingly stringent requirements regarding safety, energy density, and voltage platform (800V). Inside the battery pack, cells are typically connected together in series / parallel using aluminum busbars. Battery drain circuit breakers (BDUs) control charging and discharging and protect the cells, while battery management systems (BMSs) monitor the cells and transmit cell data to the user via communication interfaces. To accommodate more cells, the BDUs and BMSs are often grouped together. This results in a large space requirement and a surge in the number of BMS boards required for traditional centralized aluminum busbar, BDU, and BMS placement at the 800V voltage platform, becoming a bottleneck for further improving energy density. Summary of the Invention

[0003] The purpose of this invention is to disclose a battery pack that optimizes the arrangement of the two brackets and the arrangement of multiple BMS master and slave control boards on the two brackets, so as to make full use of the height space of the battery pack, improve space utilization, increase the energy density of the battery pack, and facilitate wiring harness insertion.

[0004] To achieve the above objectives, this invention discloses a battery pack, including a battery housing, a BMS master-slave control bracket, a BMS dual-slave control bracket, and a BDU assembly. The battery housing has an electrical compartment and a battery compartment arranged along the X-direction. The BMS master-slave control bracket, the BMS dual-slave control bracket, and the BDU assembly are all disposed in the electrical compartment. The BMS master-slave control bracket and the BMS dual-slave control bracket are located on two opposite sides of the BDU assembly in the Y-direction, with the X-direction perpendicular to the Y-direction. The BMS master-slave control bracket is provided with a horizontally arranged BMS master control board and a vertically arranged BDU assembly. The MS slave control board and the BMS master control board are located above the BMS slave control board. The BMS dual slave control bracket has two vertically arranged BMS slave control boards, which are spaced apart along the X direction. The upper end of the BMS slave control board farther from the battery compartment is higher than the upper end of the BMS slave control board closer to the battery compartment, so that the interface of the BMS slave control board farther from the battery compartment is exposed from the upper end of the BMS slave control board closer to the battery compartment. The interfaces of the BMS master control board and all the interfaces of the BMS slave control boards are all oriented in the same direction toward the battery compartment along the X direction.

[0005] As an optional implementation, the height of the BMS master control board is equal to the height of the BMS slave control board located on the BMS dual slave control bracket that is furthest from the battery compartment; the height of the BMS slave control board located on the BMS master-slave control bracket is equal to the height of the BMS slave control board located on the BMS dual slave control bracket that is closest to the battery compartment.

[0006] As an optional implementation, the BMS master-slave control bracket includes: Two first sub-supports are arranged at intervals along the Y direction. Each first sub-support includes a bottom support plate, a middle support plate, and two hollow vertical arms. The two vertical arms are arranged at intervals along the X direction, which is perpendicular to the Y direction. The lower end of the vertical arms is connected to the bottom support plate, and the middle support plate is connected between the two vertical arms. The bottom support plate has at least two first mounting holes for connecting to the battery box, and the middle support plate has at least one second mounting hole for connecting a vertically arranged BMS slave control board. The upper end of each vertical arm has at least one third mounting hole for connecting a horizontally arranged BMS master control board. The first, second, and third mounting holes are located at different heights from bottom to top.

[0007] As an alternative implementation, in at least one of the first sub-supports, both vertical arms include a vertical portion and a horizontal portion, the lower end of the vertical portion is connected to the bottom support plate, one end of the horizontal portion is connected to the upper end of the vertical portion, the other end of the horizontal portion extends horizontally toward the other first sub-support, and a third mounting hole is provided in the horizontal portion.

[0008] As an alternative implementation, in the first sub-bracket having at least one of the horizontal portions, a copper busbar snap-fit ​​fixing hole is provided on the middle support plate, and / or, at least one of the vertical portions is provided with a wire harness snap-fit ​​fixing hole.

[0009] As an optional implementation, each vertical arm includes an inner vertical plate, an outer vertical plate, and a top horizontal plate. The inner vertical plate and the outer vertical plate are arranged opposite to each other. The lower ends of the inner vertical plate and the outer vertical plate are connected to the bottom support plate. The top horizontal plate is connected to the upper ends of the inner vertical plate and the outer vertical plate. A third mounting hole is provided in the top horizontal plate.

[0010] As an optional implementation, at least one vertical stiffener is connected between the bottom support plate and the middle support plate; in each vertical arm, at least one horizontal stiffener is connected between the inner vertical plate and the outer vertical plate.

[0011] As an optional implementation, the bottom of the electrical compartment is provided with several reinforcing beams; the BMS master-slave control bracket and the BMS dual slave control bracket are respectively connected to different reinforcing beams; And / or, the BMS master-slave control bracket and the reinforcing beam, as well as the BMS dual slave control bracket and the reinforcing beam, are connected by blind rivets.

[0012] As an optional implementation, a buffer is also provided between the BMS master-slave control bracket and the reinforcing beam, and / or, a buffer is also provided between the BMS dual-slave control bracket and the reinforcing beam.

[0013] As an optional implementation, the BMS dual slave control bracket includes two second sub-brackets arranged at intervals along the Y direction. Each second sub-bracket has a first bearing surface and a second bearing surface. The first bearing surface and the second bearing surface are arranged at intervals along the X direction and staggered in height. The first bearing surface is provided with at least one fourth mounting hole for connecting with the BMS slave control board, and the second bearing surface is provided with at least one fifth mounting hole for connecting with the BMS slave control board.

[0014] As an optional implementation, the second sub-support has a stepped structure. The second sub-support includes a first beam and a second beam connected to the first beam. The length of the second beam is shorter than the length of the first beam, so that a part of the upper surface of the first beam is exposed as a first bearing surface, and the upper surface of the second beam serves as a second bearing surface. The bottom wall of the first beam is exposed at both ends in the X direction by cutting. The bottom wall is provided with a sixth mounting hole for connecting to the battery box.

[0015] Based on the same inventive concept, the present invention also discloses an electrical device, the application of which is as described above with a battery pack.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The master-slave control bracket and the dual-slave control bracket are positioned on opposite sides of the BDU assembly in the Y direction. Specifically, the master-slave control bracket, BDU assembly, and dual-slave control bracket are arranged sequentially along the width of the battery pack within the electrical compartment. In the master-slave control bracket, the horizontally positioned master controller is placed above the vertically positioned slave controller. In the dual-slave control bracket, the two vertically positioned slave controllers are staggered in height. Furthermore, the connectors of the master controller and all slave controllers are aligned with the battery compartment in the X direction, meaning they are all horizontally aligned with the battery compartment along the length of the battery pack. This fully utilizes the height space of the electrical compartment, improving space utilization, increasing the energy density of the battery pack, and facilitating the expansion of wiring harness insertion space, thus enhancing operational convenience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the battery pack arrangement in the electrical compartment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure connecting the BMS master-slave control bracket, the BMS board, and the reinforcing beam of the present invention.

[0020] Figure 3This is a schematic diagram of the structure connecting the BMS dual slave control bracket, the BMS board, and the reinforcing beam of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of a first sub-bracket in the BMS master-slave control bracket of the present invention.

[0022] Figure 5 This is a schematic diagram of another first sub-bracket in the BMS master-slave control bracket of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the second sub-bracket in the BMS dual slave control bracket of the present invention.

[0024] Explanation of key figure labels: 1. BMS Master-Slave Control Bracket; 11. First Sub-Bracket; 111. Bottom Support Plate; 1111. First Mounting Hole; 112. Middle Support Plate; 1121. Second Mounting Hole; 1112. Copper Busbar Clip Fixing Hole; 113. Vertical Arm; 1131. Third Mounting Hole; 1133. Vertical Section; 1132. Horizontal Section; 1134. Wire Harness Clip Fixing Hole; 1135. Inner Vertical Plate; 1136. Outer Vertical Plate; 1137. Top Horizontal Plate; 1138. Horizontal Rib Plate; 114. Vertical Rib Plate 2. BMS dual slave control bracket; 21. Second sub-bracket; 211. First beam; 2111. First bearing surface; 2112. Fourth mounting hole; 2113. Bottom wall; 2114. Sixth mounting hole; 212. Second beam; 2121. Second bearing surface; 2122. Fifth mounting hole; 3. BDU assembly; 4. BMS main control board; 5. BMS slave control board; 6. Battery housing; 61. Electrical compartment; 62. Battery compartment; 63. Reinforcing beam; 64. Buffer component; 7. Copper busbar. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0028] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0029] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0030] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0031] Please see Figures 1 to 3 As shown in the figure, this application embodiment provides a battery pack, including a battery housing 6, a BMS master-slave control bracket 1, a BMS dual slave control bracket 2, a BDU assembly 3, a horizontally placed BMS master control board 4, and three vertically placed BMS slave control boards 5. The battery housing 6 serves as the main supporting body, and it has an electrical compartment 61 and a battery compartment 62. The length direction of the battery housing 6 is defined as the X direction, the width direction as the Y direction, and the height direction as the Z direction. The X direction, Y direction, and Z direction are perpendicular to each other. At this time, the electrical compartment 61 and the battery compartment 62 are arranged along the X direction. The electrical compartment 61 can be used to accommodate electrical components, and the battery compartment 62 can be used to accommodate multiple sets of battery cells. The horizontal placement of the BMS main control board 4 means that the BMS main control board 4 is arranged horizontally, with its thickness along the Z direction, its length along the Y direction, and its width along the X direction; the vertical placement of the BMS slave control board 5 means that the BMS slave control board 5 is arranged vertically, with its thickness along the X direction, its length along the Y direction, and its width along the Z direction.

[0032] In this embodiment, the BMS master-slave control bracket 1, the BMS dual slave control bracket 2, and the BDU assembly 3 are all disposed in the electrical compartment 61. The BMS master-slave control bracket 1 and the BMS dual slave control bracket 2 are located on opposite sides of the BDU assembly 3 in the Y direction. That is, the BMS master-slave control bracket 1, the BDU assembly 3, and the BMS dual slave control bracket 2 are arranged sequentially in the electrical compartment 61 along the width direction of the battery box 6, thereby making full use of the width space of the battery box 6, while facilitating the connection of high and low voltage wiring harnesses to battery cells, and facilitating the distributed arrangement of high and low voltage wiring harnesses to avoid the concentration of high and low voltage wiring harnesses.

[0033] The BMS master-slave control bracket 1 is equipped with a horizontally arranged BMS master control board 4 and a vertically arranged BMS slave control board 5. The BMS master control board 4 is located above the BMS slave control board 5. In this case, the BMS master control board 4 can make full use of the space above the electrical compartment 61 without affecting the arrangement of other components such as the copper busbar 7 at its bottom. The wiring harness does not need to cross the bracket, shortening the wiring harness length and making the wiring harness arrangement more compact and aesthetically pleasing. At the same time, it can reduce the number of bending of the wiring harness and reduce the aging rate of the wiring harness. The BMS dual slave control bracket 2 is equipped with two vertically arranged BMS slave control boards 5. These two BMS slave control boards 5 are arranged along the... The BMS slave control board 5 is spaced apart in the X direction, with the upper end of the BMS slave control board 5 furthest from the battery compartment 62 being higher than the upper end of the BMS slave control board 5 closest to the battery compartment 62. This allows the connector of the BMS slave control board 5 furthest from the battery compartment 62 to be exposed from the upper end of the BMS slave control board 5 closest to the battery compartment 62, creating a layout where the two BMS slave control boards 5 are spaced apart and staggered in height. Furthermore, the connectors of the BMS main control board 4 and all the connectors of the BMS slave control boards 5 are all oriented in the same direction toward the battery compartment 62 in the X direction. This helps to expand the wiring harness insertion space of the BMS main control board 4 and the BMS slave control board 5, improving operational convenience.

[0034] In the above scheme, the width space of the battery box 6 is fully utilized by arranging the master-slave control bracket and the dual slave control bracket on two opposite sides of the BDU assembly 3. In the master-slave control bracket, the horizontal master controller is located above the vertical slave controller, and in the dual slave control bracket, the two vertical slave controllers are arranged at different heights. Moreover, the plug interfaces of the master controller and all slave controllers are all set in the same direction along the X direction toward the battery compartment 62, that is, they are all horizontally facing the battery compartment 62 along the length of the battery pack. Compared with the horizontal stacking arrangement, the scheme of this application can make fuller use of the height space of the electrical compartment 61, improve the space utilization rate, increase the energy density of the battery pack, and facilitate the expansion of the wiring harness plug-in space, improve the ease of operation, and solve the problem of insufficient space for BDU and BMS placement and low overall energy density in the case of multiple cells. During battery pack operation, the main controller generates more heat. Placing it on top prevents heat transfer to the slave controllers. The main controller board generates even more heat, so placing it on top is closer to the pre-reserved heat dissipation channel at the top of the electrical compartment. Hot air can rise and be expelled quickly. In the event of liquid leakage (such as condensation) in the electrical compartment, this reduces the probability of liquid dripping onto the main controller board, improving protection performance. The staggered placement of the two slave controllers provides more space for heat dissipation compared to a flush arrangement, slowing down their temperature rise. The exposed connectors on the higher slave controller board prevent the lower board from obstructing the connection process, reducing the difficulty of disassembling wiring harnesses during later maintenance. In addition, the three BMS slave controller boards use the same model, reducing the variety of parts and inventory, thus ensuring interchangeability while helping to reduce costs.

[0035] More preferably, the height of the BMS main control board 4 is equal to the height of the BMS slave control board 5 located on the BMS dual slave control bracket 2 away from the battery compartment 62, and the height of the BMS slave control board 5 located on the BMS main-slave control bracket 1 is equal to the height of the BMS slave control board 5 located on the BMS dual slave control bracket 2 close to the battery compartment 62. This ensures that the overall height is the same, reduces the occupation of height space, and also makes it easy for the wiring harness to be inserted at the same height as the plug-in interface of the two lower BMS slave control boards 5, keeping the wiring harness neat.

[0036] See Figure 2 , Figure 4 and Figure 5As an optional embodiment, the bottom of the electrical compartment 61 is provided with several reinforcing beams 63. The BMS master-slave control bracket 1 is connected to the reinforcing beams 63 at the bottom of the electrical compartment 61. Preferably, the BMS master-slave control bracket 1 includes a first sub-bracket 11. Two first sub-brackets 11 are arranged at intervals along the Y direction. Each first sub-bracket 11 is connected to a different reinforcing beam 63 at the bottom of the electrical compartment 61. The specific connection method between the first sub-bracket 11 and the reinforcing beam 63 can be by using a blind rivet connection or a self-tapping screw connection, etc., to realize the installation and fixation of the BMS master-slave control bracket 1 in the electrical compartment 61. Each first sub-support 11 includes a bottom support plate 111, a middle support plate 112, and two hollowed-out vertical arms 113. The two vertical arms 113 are spaced apart along the X direction. The lower end of the vertical arms 113 is connected to the bottom support plate 111, and the middle support plate 112 is connected between the two vertical arms 113. Preferably, the bottom support plate 111, the middle support plate 112, and the two vertical arms 113 are integrally formed. This structure of the first sub-support 11 facilitates the use of aluminum profiles for mold making, reduces weight, and provides high structural strength and low cost. The bottom support plate 111 has two first mounting holes 1111 for connecting to the battery box 6. Preferably, the two first mounting holes 1111 are located on the outer side of the two vertical arms 113. Based on the aforementioned reinforcing beam 63, the bottom support plate 111 can be placed on the upper surface of the reinforcing beam 63 and fixed to the reinforcing beam 63 by riveting or screwing through the first mounting holes 1111, thereby forming... Two fixed points spaced back and forth along the X direction ensure the connection of the bottom support plate 111. Of course, the number of first mounting holes 1111 can also be three, four, etc. The middle support plate 112 is provided with at least one second mounting hole 1121, which is used to connect the vertically arranged BMS slave control board 5. The upper end of each vertical arm 113 is provided with at least one third mounting hole 1131, which is used to connect the horizontally arranged BMS main control board 4. The first mounting hole 1111, the second mounting hole 1121 and the third mounting hole 1131 are located at different heights from bottom to top. In this way, the relative height difference between the first mounting hole 1111 and the second mounting hole 1121 and the relative height difference between the second mounting hole 1121 and the third mounting hole 1131 can be used to provide installation space for the vertically arranged BMS slave control board 5 (the height of the reinforcing beam 63 can also play a certain role).

[0037] In this embodiment, the specific shapes of the vertical arms 113 of the two first sub-supports 11 are different, as follows: See Figure 4As a type of first sub-support 11, its vertical arm 113 is shaped like a straight strip and includes an inner vertical plate 1135, an outer vertical plate 1136 and a top horizontal plate 1137. The inner vertical plate 1135 and the outer vertical plate 1136 are arranged opposite each other and are both long strips. The lower ends of the inner vertical plate 1135 and the outer vertical plate 1136 are connected to the bottom support plate 111. The top horizontal plate 1137 is connected to the upper ends of the inner vertical plate 1135 and the outer vertical plate 1136. The third mounting hole 1131 is provided in the top horizontal plate 1137. See Figure 5As another type of the first sub-support 11, the composition of each plate is the same as the first type mentioned above. That is, the vertical arm 113 also includes an inner vertical plate 1135, an outer vertical plate 1136, and a top horizontal plate 1137. The inner vertical plate 1135 and the outer vertical plate 1136 are arranged opposite to each other. The lower ends of the inner vertical plate 1135 and the outer vertical plate 1136 are connected to the bottom support plate 111, and the top horizontal plate 1137 is connected to the upper ends of the inner vertical plate 1135 and the outer vertical plate 1136. The difference is that the shape of its vertical arm 113 is an inverted L shape. That is, the inner vertical plate 1135 and the outer vertical plate 1136 are also inverted L shapes (wherein, in order to overcome stress concentration, the inner corners of its horizontal and vertical sections are rounded chamfers). The size of the top horizontal plate 1137 is correspondingly increased. When the vertical arm 113 is divided into components with an inverted L-shaped structure, the vertical arm 113 includes a vertical part 1133 and a horizontal part 1132. The vertical part 1133 of the inner vertical plate 1135 and the vertical part 1133 of the outer vertical plate 1136 constitute the vertical part 1133. The horizontal part 1132 of the inner vertical plate 1135, the horizontal part 1132 of the outer vertical plate 1136, and the top horizontal plate 1137 constitute the horizontal part 1132. At this time, the lower end of the vertical part 1133 is connected to the bottom support plate 111, one end of the horizontal part 1132 is connected to the upper end of the vertical part 1133, and the other end of the horizontal part 1132 extends horizontally toward the opposite first sub-support 11. The third mounting hole 1131 is provided in the horizontal part 1132. More preferably, in the first sub-bracket 11, the middle support plate 112 is provided with copper busbar buckle fixing hole 1112, and at least one of the vertical portions 1133 is provided with wire harness buckle fixing hole 1134. The copper busbar buckle fixing hole 1112 and the wire harness buckle fixing hole 1134 are preferably sliding groove holes. The significance of the inverted L-shaped first sub-bracket 11 is that, after the BMS main control board 4 is installed, the horizontal part 1132 can form a clearance area, which is convenient for fixing the BMS slave control board 5, and can also be used to install the copper busbar 7, making full use of the space below the BMS main control board 4; on the other hand, the copper busbar clip fixing hole 1112 and the wire harness clip fixing hole 1134 are both located on the side of the BMS slave control board 5 near the battery compartment 62, which realizes the rapid installation and positioning of the copper busbar 7 and the wire harness, improves assembly efficiency and maintainability, and while realizing the integrated arrangement of the copper busbar 7 and the wire harness, optimizes the wire harness routing, reduces cross interference, reduces the risk of contact between the wire harness and high-voltage components such as BDU components, improves electrical safety performance, and the uniform wire harness orientation facilitates the use of standardized wiring tooling, which can improve the assembly efficiency of the production line.

[0038] It should be noted that either of the two designs of the first sub-bracket 11 mentioned above can be selected, or both can be used together; preferably, both can be used together. In this way, while satisfying the requirement of forming a clearance area and facilitating the installation of the copper busbar 7, the space occupied by the BMS master-slave control bracket 1 on the side away from the BDU component 3 is reduced (at this time, Figure 5The first sub-bracket 11 shown is close to the BDU assembly 3, and the copper busbar 7 can be connected to the BDU assembly 3, while Figure 4 The first sub-bracket 11 shown is located away from the BDU assembly 3.

[0039] To further enhance the overall strength of the first sub-support 11, at least one vertical stiffener 114 is connected between the bottom support plate 111 and the middle support plate 112, thereby improving the support of the middle support plate 112 for the BMS slave control board 5. Alternatively, in each vertical arm 113, at least one horizontal stiffener 1138 is connected between the inner vertical plate 1135 and the outer vertical plate 1136, thereby improving the support of the vertical arm 113 for the BMS main control board 4. Furthermore, the perforated vertical arms 113 and the vertical stiffeners 114 and horizontal stiffeners 1138 not only enhance structural strength but also facilitate airflow within the electrical compartment, improving the heat dissipation efficiency of the slave control board.

[0040] See Figure 3 and Figure 6 As an optional embodiment, the BMS dual slave control bracket 2 is connected to the reinforcing beam 63 at the bottom of the electrical compartment 61. Preferably, the BMS dual slave control bracket 2 includes two second sub-brackets 21, which are also arranged at intervals along the Y direction. Each second sub-bracket 21 is connected to a different reinforcing beam 63 at the bottom of the electrical compartment 61. The specific connection method between the second sub-bracket 21 and the reinforcing beam 63 can be by using blind rivets or self-tapping screws, etc., to realize the installation and fixation of the BMS dual slave control bracket 2 in the electrical compartment 61. Each second sub-bracket 21 has a first bearing surface 2111 and a second bearing surface 2121. The first bearing surface 2111 and the second bearing surface 2121 are arranged at intervals along the X direction and are staggered in height. With the height of the first bearing surface 2111 being lower than the height of the second bearing surface 2121 as a reference, the first bearing surface 2111 is closer to the battery compartment 62, while the second bearing surface 2121 is farther away from the battery compartment 62. This makes the height of the BMS slave control board 5 installed on the first bearing surface 2111 lower than the height of the BMS slave control board 5 installed on the second bearing surface 2121. This makes the two BMS slave control boards 5 in the BMS dual slave control bracket 2 form a staggered layout. The first bearing surface 2111 is provided with at least one fourth mounting hole 2112 for connecting with the BMS slave control board 5, and the second bearing surface 2121 is provided with at least one fifth mounting hole 2122 for connecting with the BMS slave control board 5.

[0041] See Figure 6, preferably, the second sub-bracket 21 is integrally formed and has a stepped structure. The second sub-bracket 21 includes a first beam 211 and a second beam 212 connected to the first beam 211. The length of the second beam 212 is shorter than that of the first beam 211, so that a part of the upper surface of the first beam 211 is exposed as the first bearing surface 2111, and the upper surface of the second beam 212 is used as the second bearing surface 2121. In this way, the second sub-bracket 21 can be made by cutting a profile with a unified cross-section in the shape of a Chinese character 'ri', thereby reducing the production cost. Among them, in order to facilitate the connection between the second sub-bracket 21 and the battery box 6, more preferably, the two ends of the first beam 211 in the X direction are respectively exposed by cutting to expose its bottom wall 2113, and a sixth mounting hole 2114 for connecting with the battery box 6 is provided on the bottom wall 2113. Based on the foregoing reinforcing beam 63, the first beam 211 can be placed on the upper surface of the reinforcing beam 63 and fixed to the reinforcing beam 63 by riveting or screwing through the sixth mounting hole 2114, so as to form two fixed points spaced front and rear in the X direction to realize the installation of the second sub-bracket 21 on the reinforcing beam 63. The reinforcing beam 63 is a bearing structure of the battery box. The sub-bracket 21 is directly connected to the reinforcing beam 63, which can utilize the stiffness of the box body itself without additionally setting an installation base, further saving the space of the electrical compartment; the connection points are located on the reinforcing beam 63, improving the impact resistance of the bracket. When the battery pack encounters collision or bump, it can better protect the BMS slave board and the BMS master board.

[0042] Refer to Figure 2 and Figure 3 , a buffer member 64 can be provided between the BMS master-slave control bracket 1 and the reinforcing beam 63 and between the BMS double-slave control bracket 2 and the reinforcing beam 63. The buffer member 64 can specifically be a rubber pad or other elastic members to absorb vibration by using the buffer member 64, improve the anti-vibration performance of the BMS, and extend the service life.

[0043] The present invention also provides an electrical equipment, and the electrical equipment applies the battery pack as described above. Specifically, the electrical equipment can be a new energy vehicle or an energy storage cabinet, etc.

[0044] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present invention.

Claims

1. A battery pack, characterized in that, Includes battery housing (6), BMS master-slave control bracket (1), BMS dual slave control bracket (2), and BDU assembly (3). The battery housing (6) has an electrical compartment (61) and a battery compartment (62) arranged along the X direction. The BMS master-slave control bracket (1), the BMS dual slave control bracket (2) and the BDU assembly (3) are all disposed in the electrical compartment (61). The BMS master-slave control bracket (1) and the BMS dual slave control bracket (2) are located on two opposite sides of the BDU assembly (3) in the Y direction. The X direction is perpendicular to the Y direction. The BMS master-slave control bracket (1) is provided with a horizontally arranged BMS master control board (4) and a vertically arranged BMS slave control board (5), with the BMS master control board (4) located above the BMS slave control board (5). The BMS dual slave control bracket (2) is provided with two vertically arranged BMS slave control boards (5), which are spaced apart in the X direction. The upper end of the BMS slave control board (5) that is farther away from the battery compartment (62) is higher than the upper end of the other BMS slave control board (5) that is closer to the battery compartment (62), so that the plug interface of the BMS slave control board (5) that is farther away from the battery compartment (62) is exposed from the upper end of the other BMS slave control board (5) that is closer to the battery compartment (62). Furthermore, the interfaces of the BMS main control board (4) and all the interfaces of the BMS slave control boards (5) are arranged in the same direction along the X direction toward the battery compartment (62).

2. The battery pack according to claim 1, characterized in that, The height of the BMS master control board (4) is equal to the height of the BMS slave control board (5) located on the BMS dual slave control bracket (2) away from the battery compartment (62); the height of the BMS slave control board (5) located on the BMS master-slave control bracket (1) is equal to the height of the BMS slave control board (5) located on the BMS dual slave control bracket (2) close to the battery compartment (62).

3. The battery pack according to claim 1, characterized in that, The BMS master-slave control bracket (1) includes: Two first sub-supports (11) are arranged at intervals along the Y direction. Each first sub-support (11) includes a bottom support plate (111), a middle support plate (112), and two hollow vertical arms (113). The two vertical arms (113) are arranged at intervals along the X direction, which is perpendicular to the Y direction. The lower end of each vertical arm (113) is connected to the bottom support plate (111), and the middle support plate (112) is connected between the two vertical arms (113). The bottom support plate (111) is provided with at least two connections for connecting to the battery box (6). The first mounting hole (1111) is provided on the middle support plate (112), and the second mounting hole (1121) is provided on the middle support plate (112). The second mounting hole (1121) is used to connect the vertically arranged BMS slave control board (5). The upper end of each vertical arm (113) is provided with at least one third mounting hole (1131). The third mounting hole (1131) is used to connect the horizontally arranged BMS main control board (4). The first mounting hole (1111), the second mounting hole (1121) and the third mounting hole (1131) are located at different heights from bottom to top.

4. The battery pack according to claim 3, characterized in that, In at least one of the first sub-supports (11), both vertical arms (113) include a vertical portion (1133) and a horizontal portion (1132). The lower end of the vertical portion (1133) is connected to the bottom support plate (111), one end of the horizontal portion (1132) is connected to the upper end of the vertical portion (1133), and the other end of the horizontal portion (1132) extends horizontally toward the other first sub-support (11) opposite to it. The third mounting hole (1131) is provided in the horizontal portion (1132).

5. The battery pack according to claim 4, characterized in that, In the first sub-bracket (11) having at least one of the horizontal portions (1132), the middle support plate (112) is provided with copper busbar buckle fixing holes (1112), and / or, at least one of the vertical portions (1133) is provided with wire harness buckle fixing holes (1134).

6. The battery pack according to any one of claims 3-5, characterized in that, Each of the vertical arms (113) includes an inner vertical plate (1135), an outer vertical plate (1136), and a top horizontal plate (1137). The inner vertical plate (1135) and the outer vertical plate (1136) are arranged opposite to each other. The lower ends of the inner vertical plate (1135) and the outer vertical plate (1136) are connected to the bottom support plate (111). The top horizontal plate (1137) is connected to the upper ends of the inner vertical plate (1135) and the outer vertical plate (1136). The third mounting hole (1131) is provided in the top horizontal plate (1137).

7. The battery pack according to claim 6, characterized in that, At least one vertical stiffener plate (114) is connected between the bottom support plate (111) and the middle support plate (112); in each of the vertical arms (113), at least one horizontal stiffener plate (1138) is connected between the inner vertical plate (1135) and the outer vertical plate (1136).

8. The battery pack according to claim 1, characterized in that, The bottom of the electrical compartment (61) is provided with several reinforcing beams (63); the BMS master-slave control bracket (1) and the BMS dual slave control bracket (2) are respectively connected to different reinforcing beams (63); And / or, the BMS master-slave control bracket (1) and the reinforcing beam (63) are connected by blind rivets as well as the BMS dual slave control bracket (2) and the reinforcing beam (63).

9. The battery pack according to claim 8, characterized in that, A buffer (64) is also provided between the BMS master-slave control bracket (1) and the reinforcing beam (63), and / or, a buffer (64) is also provided between the BMS dual slave control bracket (2) and the reinforcing beam (63).

10. The battery pack according to claim 1, characterized in that, The BMS dual slave control bracket (2) includes two second sub-brackets (21) arranged at intervals along the Y direction. Each second sub-bracket (21) has a first bearing surface (2111) and a second bearing surface (2121). The first bearing surface (2111) and the second bearing surface (2121) are arranged at intervals along the X direction and are staggered in height. The first bearing surface (2111) is provided with at least one fourth mounting hole (2112) for connecting with the BMS slave control board (5). The second bearing surface (2121) is provided with at least one fifth mounting hole (2122) for connecting with the BMS slave control board (5).

11. The battery pack according to claim 10, characterized in that, The second sub-support (21) has a stepped structure. The second sub-support (21) includes a first beam (211) and a second beam (212) connected to the first beam (211). The length of the second beam (212) is shorter than the length of the first beam (211), so that a part of the upper surface of the first beam (211) is exposed as the first bearing surface (2111), and the upper surface of the second beam (212) is the second bearing surface (2121). The bottom wall (2113) of the first beam (211) is exposed at both ends in the X direction by cutting. The bottom wall (2113) is provided with a sixth mounting hole (2114) for connecting with the battery box (6).

12. An electrical appliance, characterized in that, The application has a battery pack as described in any one of claims 1-11.

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