Battery pack panel, battery box, battery pack and engineering machinery

Abstract

The utility model relates to the field of battery packs, and discloses a battery pack panel, a battery box, a battery pack and engineering machine.The battery pack panel comprises a panel body, a balance interface, a positive electrode high-voltage connector, a negative electrode high-voltage connector, a low-voltage connector and a maintenance switch, and the panel body is provided with a plurality of through holes; the equalization interface, the positive electrode high-voltage connector, the negative electrode high-voltage connector, the low-voltage connector and the maintenance switch are arranged on the board body and extend out of the through holes in a one-to-one correspondence mode. The battery pack panel, the battery box, the battery pack and the engineering machinery have better maintenance convenience.

Description

Technical Field

[0001] This application belongs to the field of battery packs, specifically relating to a battery pack panel, a battery box, a battery pack, and engineering machinery. Background Technology

[0002] With the rapid development of the new energy industry, the requirements for the convenience of after-sales maintenance of battery packs are also increasing. When the battery voltage difference is too large, the common approach is to open the battery cover for maintenance, performing individual charging and discharging operations on the cells with the excessive voltage difference. This method allows dust and moisture from the environment to enter the battery pack casing during maintenance, severely affecting the battery pack's lifespan. Furthermore, after maintenance, complex tests are required on the battery distribution box to ensure the battery pack's safety, adding extra workload. Therefore, existing cell voltage difference fault repair solutions are inefficient, unsafe, and require significant manpower and resources. Summary of the Invention

[0003] The purpose of this application is to provide a battery pack panel, battery box, battery pack, and engineering machinery with better maintenance convenience.

[0004] To achieve the above objectives, the first aspect of this application provides a battery pack panel, which includes a panel body, an equalization interface, a positive high-voltage connector, a negative high-voltage connector, a low-voltage connector, and a maintenance switch. The panel body is provided with a plurality of through holes, and the equalization interface, the positive high-voltage connector, the negative high-voltage connector, the low-voltage connector, and the maintenance switch are all disposed on the panel body and extend from the plurality of through holes in a corresponding manner.

[0005] In some specific embodiments, the circumferential edge of the panel body is provided with multiple fixing and mounting structures, which extend out of the panel body surface;

[0006] And / or, the battery pack panel further includes a base portion connected to the bottom end of the panel body, the base portion having a plurality of fixing mounting holes.

[0007] In some specific embodiments, the equalization interface has multiple pins, which are used to connect one-to-one with the positive and negative terminals of individual cells in the battery pack.

[0008] And / or, the battery pack panel further includes a heating input connector and a heating output connector, the heating input connector and the heating output connector being respectively disposed on the panel body and extending from the through hole.

[0009] A second aspect of this application provides a battery case that includes the aforementioned battery pack panel.

[0010] In some specific embodiments, the battery box further includes a top cover, the front panel of which has a window, the circumferential edge of the panel body is connected to the inner edge of the window, and the equalization interface, the positive high voltage connector, the negative high voltage connector, the low voltage connector and the maintenance switch extend out of the window.

[0011] In some specific embodiments, the battery box further includes a panel sealing ring disposed between the circumferential edge of the panel body and the edge of the window.

[0012] In some specific embodiments, the battery box further includes a lower housing, and the upper cover is connected to the lower housing and together defines a cavity for accommodating the battery module.

[0013] In some specific embodiments, the lower housing includes a liquid-cooled bottom plate, a first end plate, and a second end plate. The liquid-cooled bottom plate is an integrally formed part and includes a bottom plate body and two side beams. The bottom plate body serves as the bottom wall of the battery box and has a liquid-cooled channel running through it in a first direction. The two side beams extend in the first direction and are separately arranged at both ends of the bottom plate body in the second direction. The first end plate and the second end plate are integrally formed parts. The first end plate and the second end plate are separately arranged on both sides of the liquid-cooled bottom plate in the first direction and correspondingly block the two channel openings of the liquid-cooled channel that are arranged opposite to each other in the first direction. The first end plate, the second end plate, and the two side beams are connected to form a circumferential ring around the bottom plate body, and the upper cover is connected to the circumferential ring.

[0014] A third aspect of this application also provides a battery pack, which includes the aforementioned battery box. The battery box contains a battery module and a BMS slave board. The low-voltage connector is communicatively connected to the BMS slave board. The maintenance switch is connected in series in the high-voltage circuit of the battery module. The positive high-voltage connector is connected to the total positive current of the battery module, and the negative high-voltage connector is connected to the total negative current of the battery module. Multiple pins of the balancing interface are respectively connected to the positive and negative terminals of multiple individual cells in the battery module.

[0015] A fourth aspect of this application also provides an engineering machine that includes the aforementioned battery pack.

[0016] Through the above technical solution, the battery pack panel integrates an equalization interface, positive high-voltage connector, negative high-voltage connector, low-voltage connector, and maintenance switch on the panel body. This results in a simple, compact, highly integrated, and space-efficient overall battery pack structure, improving production efficiency. Furthermore, with the equalization interface located on the battery pack panel, when the battery pack voltage difference is too large and equalization is required, an external equalization device can be directly connected to the equalization port to equalize the battery pack. This allows for repairs of excessive voltage difference faults without disassembling the battery pack cover, offering better operability, higher safety, and better equalization results. It also reduces personnel risks during maintenance and minimizes adverse effects on battery pack lifespan.

[0017] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0019] Figure 1 A schematic diagram of the structure of a battery pack according to a specific embodiment of this application is shown;

[0020] Figure 2 for Figure 1 Exploded view of the battery pack structure in the image;

[0021] Figure 3 for Figure 2 Exploded view of the structure of the top cover and electrical integration panel in the middle;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure of the electrical integrated panel in the diagram;

[0023] Figure 5 for Figure 3 A structural schematic diagram of the electrical integration panel from another perspective;

[0024] Figure 6 for Figure 4 A schematic diagram of the panel body in the diagram;

[0025] Figure 7 A schematic diagram of the electrical connections of a battery pack panel according to a specific embodiment of this application is shown;

[0026] Figure 8A schematic diagram of the structure of the liquid-cooled base plate, the first end plate, and the second end plate according to a specific embodiment of this application is shown.

[0027] Explanation of reference numerals in the attached figures

[0028] 100 battery box with liquid cooling base plate

[0029] 11. Base plate body; 12. Side beams

[0030] 2a First end plate 2b Second end plate

[0031] 4 adapter block 5 top cover

[0032] 51 Window 52 Explosion-proof valve mounting hole

[0033] 53 panel mounting holes, 6 panel sealing rings

[0034] 7BMS fixed structure from board 8 base

[0035] 200 battery module with 300 thermal conductive layer

[0036] 400 Battery Pack Panel 401 Panel Body

[0037] 4011 Fixed installation structure; 402 Equalization interface

[0038] 403 Positive High Voltage Connector; 404 Negative High Voltage Connector

[0039] 405 Low-voltage connector; 406 Repair switch

[0040] 407 Base section 408 Heating input connector

[0041] 409 Heating Output Connector 500 Explosion-proof Valve

[0042] 600 sealing ring, 700 heating film Detailed Implementation

[0043] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0044] Battery pack housings typically contain high-voltage connectors for electrical connections (positive and negative terminals), low-voltage connectors for signal communication, and maintenance switches for after-sales service. Currently, these components are generally independently fixed to the battery pack housing in different spatial locations. This results in numerous openings in the battery housing, complex assembly, a large footprint, a non-compact structure, and an inability to meet the requirements for high spatial energy density.

[0045] Furthermore, although the battery pack is equipped with a maintenance switch, this only reduces the risk of electric shock to operators when repairing faulty batteries; it does not solve the problem of excessive voltage differences between the battery cells. Excessive voltage differences cause a significant decrease in the overall capacity of the battery pack. The battery pack itself cannot adjust or recover during normal charging and discharging. Currently, when excessive voltage differences occur, the problem is addressed by opening the battery pack cover and individually charging and discharging the cells with abnormal voltages to bring them up to the same voltage as the other cells. This method allows dust and moisture from the environment to enter the battery pack casing during maintenance, severely impacting the battery pack's lifespan. Moreover, after maintenance, complex tests are required on the battery distribution box to ensure the battery pack's safety, further increasing the maintenance workload.

[0046] In view of this, such as Figure 4 , Figure 5 and Figure 6 As shown, this application provides a battery pack panel 400, which includes a panel body 401, an equalization interface 402, a positive high-voltage connector 403, a negative high-voltage connector 404, a low-voltage connector 405, and a maintenance switch 406. The panel body 401 is provided with multiple through holes. The equalization interface 402, the positive high-voltage connector 403, the negative high-voltage connector 404, the low-voltage connector 405, and the maintenance switch 406 are all disposed on the panel body 401 and extend from the multiple through holes one by one.

[0047] As can be seen, by placing the balancing interface 402 on the integrated panel body 401, when the battery pack voltage difference is too large and balancing is required, the external balancing equipment can be directly connected to the balancing interface 402 to balance the battery pack. This allows for repairing faults caused by excessive battery pack voltage difference without disassembling the battery pack cover, resulting in better operability, higher safety, and better balancing effect. It also reduces personnel risks and adverse effects on battery pack lifespan during maintenance. Furthermore, in addition to the balancing interface 402, the integrated panel body 401 also integrates a positive high-voltage connector 403, a negative high-voltage connector 404, a low-voltage connector 405, and a maintenance switch 406, making the overall battery pack structure simple, compact, highly integrated, and space-efficient, thus improving production efficiency. Moreover, the battery pack panel 400 of this application has a high degree of integration, can adapt to various battery packs, and offers high adaptability and flexibility.

[0048] It should be noted that the arrangement of the equalization interface 402, positive high-voltage connector 403, negative high-voltage connector 404, low-voltage connector 405, and maintenance switch 406 on the panel body 401 can be varied. Furthermore, the structural principles of the equalization interface 402, positive high-voltage connector 403, negative high-voltage connector 404, low-voltage connector 405, and maintenance switch 406 are well known to those skilled in the art and are not part of the core improvements of this application; therefore, they will not be described in detail here.

[0049] Optionally, to make the structure of the battery pack panel 400 more reasonable, compact, and easier to operate, such as Figure 4 , Figure 5 and Figure 6 As shown, the maintenance switch 406 is located in the center of the panel body 401. The positive high-voltage connector 403 and the negative high-voltage connector 404 are symmetrically arranged on the upper left and upper right of the maintenance switch 406. Two low-voltage connectors 405 are provided and symmetrically arranged on the lower left and lower right of the maintenance switch 406. The panel body 401 has multiple mounting holes. The equalization interface 402, the positive high-voltage connector 403, the negative high-voltage connector 404, the low-voltage connector 405, and the maintenance switch 406 are respectively mounted on the panel body 401 through the multiple mounting holes and fasteners.

[0050] Among them, such as Figure 7 As shown, the negative high-voltage connector 404 is connected to the main negative connection within the battery pack, and the positive high-voltage connector 403 is connected to one end of the maintenance switch 406. The other end of the maintenance switch 406 is connected to the main positive connection within the battery pack. The maintenance switch 406 is connected in series in the high-voltage circuit of the battery module 200. In case of an abnormality in the battery pack, the connection between the battery pack and other components can be manually and safely disconnected, thereby disconnecting the high-voltage circuit and protecting the safety of personnel and equipment. Two low-voltage connectors 405 are respectively connected to the BMS slave board 7 within the battery pack, realizing the conversion interface for communication between the BMS slave board 7 and the outside world. The positive and negative terminals of each individual cell in the battery pack are connected to the BMS slave board 7 to realize the transmission of voltage information.

[0051] Furthermore, the balancing interface 402 has a multi-pin connector, with each pin corresponding to the positive and negative terminals of the individual cells within the battery pack. The balancing interface 402, in conjunction with the wiring harness used on the battery module 200, avoids the need for additional wiring and eliminates the risk of short circuits caused by improper connections. When the battery pack voltage difference is too large and balancing is required, an external balancing device can be directly connected to the balancing interface 402 on the battery pack panel. Balancing the battery pack allows for troubleshooting of excessive voltage differences without disassembling the battery pack cover, offering advantages such as good operability, high safety, low maintenance costs, and better balancing results.

[0052] Optionally, the battery pack panel 400 may further include a heating input connector 408 and a heating output connector 409, which are respectively disposed on the panel body 401 and extend from the through holes of the panel body 401. Figure 7 As shown, the heating input connector 408 and the heating output connector 409 are respectively connected in series at both ends of the heating film 700 inside the battery pack, serving as adapter interfaces for connecting the heating film circuit. Figure 4 , Figure 5 and Figure 6 As shown, the heating input connector 408 and the heating output connector 409 are symmetrically arranged on the outside of the two low-voltage connectors 405, making the structure of the battery pack panel 400 more reasonable, compact and easy to operate.

[0053] Optionally, such as Figure 4 , Figure 5 and Figure 6 As shown, the circumferential edge of the panel body 401 is provided with multiple fixing structures 4011. The panel body 401 can be mounted on the battery box 100 through the multiple fixing structures 4011 and fasteners. Among them, the fixing structures 4011 protrude from the outer surface of the panel body 401. In this way, when it is necessary to clamp the sealing ring 6 between the circumferential edge of the panel body 401 and the edge of the window 51, the fixing structures 4011 can also be used to position and install the panel sealing ring 6. This not only restricts the movement of the panel sealing ring 6, but also effectively ensures the amount of compression of the sealing ring, thereby ensuring the sealing performance of the battery pack panel 400.

[0054] Optionally, the battery pack panel 400 may further include a base portion 407 connected to the bottom end of the panel body 401, the base portion 407 having a plurality of fixing holes for connection to the lower casing of the battery box. Specifically, as Figure 4 , Figure 5 and Figure 6 As shown, the panel body 401 and the base part 407 form an L-shaped structure, and the panel body 401 and the base part 407 can be integrally formed bent plates. Fasteners can pass through the mounting holes of the base part 407 and be fixed to the lower battery pack housing, thereby achieving a detachable connection between the battery pack panel 400 and the lower battery pack housing.

[0055] like Figure 1 As shown, a second aspect of this application provides a battery box including the aforementioned battery pack panel 400, which is disposed on the body of the battery box 100. Since the battery box includes the aforementioned battery pack panel 400, it also possesses all the technical effects brought about by the battery pack panel 400.

[0056] Optionally, such as Figure 2 and Figure 3 As shown, the battery box 100 also includes an upper cover 5 and a lower box body. The upper cover 5 is connected to the lower box body to form the box body of the battery box 100. The front panel of the upper cover 5 is provided with a window 51 and a panel mounting hole 53. The circumferential edge of the panel body 401 is connected to the inner edge of the window 51 by multiple fasteners, multiple fixing structures 4011 and multiple panel mounting holes 53. The equalization interface 402, the positive high voltage connector 403, the negative high voltage connector 404, the low voltage connector 405 and the maintenance switch 406 extend out of the window 51 respectively.

[0057] Optionally, the front panel of the top cover 5 is also provided with an explosion-proof valve mounting hole 52, through which the explosion-proof valve 500 is mounted on the top cover 5.

[0058] Furthermore, the battery box 100 may also include a panel sealing ring 6, which is disposed between the circumferential edge of the panel body 401 and the edge of the window 51, thereby ensuring the airtightness of the battery box 100.

[0059] Furthermore, such as Figure 2 and Figure 8 As shown, the battery box 100 may further include a lower box body, with the upper cover 5 connected to the lower box body and together defining a cavity for accommodating the battery module 200. Figure 8 As shown, the lower housing includes a liquid-cooled base plate 1, a first end plate 2a, and a second end plate 2b. The liquid-cooled base plate 1 is an integrally formed part and includes a base plate body 11 and two side beams 12. The base plate body 11 serves as the bottom wall of the battery box 100 and has a liquid-cooling channel running through it in a first direction. The two side beams 12 extend along the first direction and are spaced apart along a second direction. The two side beams 12 are correspondingly formed at the two ends of the base plate body 11 along the second direction. Since the liquid-cooling channel runs through the base plate body 11 in the first direction, two oppositely arranged channel openings are formed at the two ends of the base plate body 11 along the first direction, and the two channel openings connect to the liquid-cooling channel.

[0060] Furthermore, the first end plate 2a and the second end plate 2b are integrally formed parts. The first end plate 2a and the second end plate 2b extend along the second direction and are separately arranged on both sides of the liquid-cooled base plate 1 along the first direction. The first end plate 2a and the second end plate 2b respectively block the two channel openings of the liquid-cooling channel arranged opposite each other along the first direction. The first end plate 2a, the second end plate 2b and the two side beams 12 are connected to form a circumferential ring frame around the base plate body 11, and the upper cover 5 is connected to the circumferential ring frame.

[0061] In this design, the base plate body 11 of the liquid-cooled base plate 1 serves as the bottom wall of the battery box 100, eliminating the need for a separate liquid-cooled plate or outer peripheral wall of the bottom, effectively reducing the overall cost of the battery pack, making the battery pack lighter and the overall structure more compact, and also improving the space utilization and battery capacity density of the battery pack. Furthermore, since the base plate body 11 of the liquid-cooled base plate 1 directly serves as the bottom wall of the battery box 100, heat transfer links are reduced, and the heat from the battery cells is absorbed by the battery box and directly transferred to the outside air, improving the heat dissipation efficiency of the battery box.

[0062] In addition, the liquid cooling channel is used for the flow of coolant. The liquid cooling channel runs through the base plate body 11 along the first direction. The liquid cooling channel is a straight channel with a uniform cross-sectional shape everywhere. This makes the liquid cooling channel free from complex bending and obstruction structures, allowing it to be directly machined on the base plate body 11 along the first direction without having to be assembled from multiple peripheral walls. This simplifies the structure and processing technology of the liquid cooling base plate 1, and allows the liquid cooling base plate 1 to be formed as a single molded part.

[0063] Furthermore, the liquid-cooled base plate 1 is a one-piece molded component, with the base plate body 11 and the two side beams 12 being integrally molded. This eliminates the need for additional welding connections, reducing the number of parts and welds, simplifying the structure, and making it easier to process. It also reduces the number of molded parts, lowers the weight of the finished product, improves volume utilization and assembly efficiency, and achieves lightweight and easy-to-process housing structure. It also avoids the stress concentration problem caused by traditional bending forming processes, effectively improving the main structural strength of the battery housing and the reliability of core components, enhancing the service safety and lifespan of the battery pack, and making it suitable for more application scenarios.

[0064] like Figure 2 and Figure 8 As shown, the first end plate 2a blocks one of the openings of the liquid cooling channel, and the second end plate 2b blocks the other opening, thus sealing off both openings of the liquid cooling channel. Furthermore, the liquid cooling base plate 1, the first end plate 2a, and the second end plate 2b are welded together to form the lower casing of the battery box 100. The first end plate 2a, the second end plate 2b, and the two side beams 12 are connected to form a circumferential ring frame surrounding the base plate body 11. This circumferential ring frame serves as the main frame of the lower casing of the battery box 100, ensuring sufficient structural strength for the battery box 100.

[0065] To facilitate manufacturing and reduce manufacturing costs, the liquid-cooled base plate 1, the first end plate 2a, and the second end plate 2b are extruded parts of an integrally formed component. The liquid-cooled base plate 1, the first end plate 2a, and the second end plate 2b together constitute the lower housing that houses the battery module 200. The interior of the lower housing is spliced ​​together by welding seams, achieving an internal sealing effect and ensuring the airtightness of the battery box.

[0066] Optionally, such as Figure 2 and Figure 8As shown, the battery box may also include two adapter blocks 4 with connecting channels. The first end plate 2a is provided with a first inlet and a first outlet at intervals along the second direction. The top wall of the bottom plate body 11 near the end of the first end plate 2a is provided with a second inlet and a second outlet communicating with the liquid cooling channel. One end of one adapter block 4 passes through the first inlet and communicates with the liquid cooling channel through the second inlet, and one end of the other adapter block 4 passes through the first outlet and communicates with the liquid cooling channel through the second outlet. In this way, coolant can enter the liquid cooling channel from one adapter block 4 and the second inlet, and flow out of the liquid cooling channel from the second outlet and the other adapter block 4, forming a circulating flow of coolant, which can cool the battery module 200 inside the battery box 100. By using the adapter block 4 to connect the coolant supply device outside the battery box 100 with the liquid cooling bottom plate 1 inside the battery box 100, the liquid cooling adapter hose is no longer needed, which can reduce mold opening costs and material costs, and the overall strength is higher and the corrosion resistance is better.

[0067] Specifically, such as Figure 8 As shown, the two adapter blocks 4 respectively include an outer connector and an inner adapter arranged along the first direction. The two outer connectors are pipe connectors and are located outside the first inlet and the first outlet. The pipe wall of the inner adapter is provided with a flat cut and the end has an end wall. The flat cuts of the two inner adapters are respectively covered on the second inlet and the second outlet, and are welded and sealed to the periphery of the openings of the second inlet and the second outlet. The overall structure is simple and compact.

[0068] Optionally, such as Figure 2 As shown, the side beam 12 can be cylindrical, and weight-reduction holes are provided on the peripheral wall of the side beam 12, thus making the battery box 100 lighter. Furthermore, the cross-sectional shape of the side beam 12 is a rounded trapezoid, which gives the side beam 12 two inclined surfaces, ensuring sufficient strength while achieving weight reduction. In addition, a fixing mounting part for fixed connection with the vehicle body can be welded onto the side beam 12.

[0069] Optionally, such as Figure 2 As shown, the base plate body 11 is provided with multiple base fixing structures 8, and the battery pack panel 400 is detachably mounted on the liquid-cooled base plate 1 through multiple fasteners, base fixing structures 8 and multiple fixing mounting holes of the base part 407.

[0070] A third aspect of this application provides a battery pack including the aforementioned battery case 100, wherein a battery module 200 and a BMS slave board 7 are disposed within the cavity of the battery case 100. Since the battery pack includes the aforementioned battery case 100, it also possesses all the technical effects brought about by the battery case 100.

[0071] Optionally, such as Figure 1As shown, the battery pack may also include a thermally conductive layer 300, an explosion-proof valve 500, and a sealing ring 600. The thermally conductive layer 300 is disposed between the battery module and the liquid-cooled base plate for heat conduction.

[0072] A fourth aspect of this application provides a type of construction machinery that includes the aforementioned battery pack. Because the construction machinery includes the aforementioned battery pack, it also possesses all the technical effects brought about by the battery pack. This construction machinery can be a new energy construction machinery.

[0073] In summary, the battery pack panel of this application integrates an equalization interface, a positive high-voltage connector, a negative high-voltage connector, a low-voltage connector, and a maintenance switch on the panel body. This results in a simple, compact, highly integrated, and space-efficient overall battery pack structure, improving production efficiency. Furthermore, the equalization interface is located on the battery pack panel. When the battery pack voltage difference is too large and equalization is required, an external equalization device can be directly connected to the equalization port to equalize the battery pack. This allows for repairs of excessive voltage difference faults without disassembling the battery pack cover, offering better operability, higher safety, and better equalization results. It also reduces personnel risks and adverse effects on battery pack lifespan during maintenance.

[0074] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery pack panel, characterized in that, The device includes a panel body (401), an equalization interface (402), a positive high-voltage connector (403), a negative high-voltage connector (404), a low-voltage connector (405), and a maintenance switch (406). The panel body (401) has multiple through holes. The equalization interface (402), the positive high-voltage connector (403), the negative high-voltage connector (404), the low-voltage connector (405), and the maintenance switch (406) are all located on the panel body (401) and extend from the multiple through holes in a corresponding manner.

2. The battery pack panel according to claim 1, characterized in that, The panel body (401) has a plurality of fixed mounting structures (4011) on its circumferential edge, and the fixed mounting structures (4011) protrude from the outer side of the panel body (401). And / or, the battery pack panel (400) further includes a base portion (407) connected to the bottom end of the panel body (401), the base portion (407) having a plurality of fixing holes for connecting to the lower casing of the battery box.

3. The battery pack panel according to claim 1, characterized in that, The equalization interface (402) has multiple pins, which are used to connect one-to-one with the positive and negative terminals of the individual cells in the battery pack; And / or, the battery pack panel (400) further includes a heating input connector (408) and a heating output connector (409), the heating input connector (408) and the heating output connector (409) being respectively disposed on the panel body (401) and extending from the through hole.

4. A battery box, characterized in that, Includes the battery pack panel (400) as described in any one of claims 1 to 3.

5. The battery box according to claim 4, characterized in that, The battery box (100) also includes a top cover (5), the front panel of the top cover (5) is provided with a window (51), the circumferential edge of the panel body (401) is connected to the inner edge of the window (51), and the equalization interface (402), the positive high voltage connector (403), the negative high voltage connector (404), the low voltage connector (405) and the maintenance switch (406) extend out of the window (51).

6. The battery box according to claim 5, characterized in that, The battery box (100) also includes a panel sealing ring (6), which is disposed between the circumferential edge of the panel body (401) and the edge of the window (51).

7. The battery box according to claim 5, characterized in that, The battery box (100) also includes a lower box body, and the upper cover (5) is connected to the lower box body and together defines a cavity for accommodating the battery module.

8. The battery box according to claim 7, characterized in that, The lower housing includes a liquid-cooled bottom plate (1), a first end plate (2a), and a second end plate (2b). The liquid-cooled bottom plate (1) is an integrally formed part and includes a bottom plate body (11) and two side beams (12). The bottom plate body (11) serves as the bottom wall of the battery box (100) and has a liquid-cooled channel running through it in a first direction. The two side beams (12) extend in the first direction and are separately arranged at both ends of the bottom plate body (11) in the second direction. The first end plate (2a) and the second end plate (2b) are integrally formed parts. The first end plate (2a) and the second end plate (2b) are separately arranged on both sides of the liquid-cooled bottom plate (1) in the first direction and correspondingly block the two channel openings of the liquid-cooled channel arranged opposite each other in the first direction. The first end plate (2a), the second end plate (2b), and the two side beams (12) are connected to form a circumferential ring around the bottom plate body (11). The upper cover (5) is connected to the circumferential ring.

9. A battery pack, characterized in that, The battery box (100) includes any one of claims 4 to 8, wherein a battery module (200) and a BMS slave board (7) are provided in the cavity of the battery box (100), the low-voltage connector (405) is communicatively connected to the BMS slave board (7), the maintenance switch (406) is connected in series in the high-voltage circuit of the battery module (200), the positive high-voltage connector (403) is connected to the total positive current of the battery module (200), the negative high-voltage connector (404) is connected to the total negative current of the battery module (200), and the multiple pins of the equalization interface (402) are respectively connected to the positive and negative terminals of multiple individual cells in the battery module (200).

10. An engineering machinery, characterized in that, Includes the battery pack as described in claim 9.

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