Battery box and battery device

Abstract

The utility model relates to battery technology field, specifically disclose battery box and battery device, the battery box includes box, output structure and conducting row group, the box includes end plate, and the end plate is provided with via hole along the first horizontal direction, the battery module is located end plate one side along the first horizontal direction, the output structure includes the positive pole connector and negative pole connector who set through the via hole and are fixedly connected with end plate, the conducting row group includes connecting conducting row, positive pole conducting row and negative pole conducting row, connecting conducting row connects the multiple monomer batteries of battery module in series or parallel, the positive pole conducting row is used for connecting the output positive pole of battery module with positive pole connector, and the negative pole conducting row is used for connecting the output negative pole of battery module with negative pole connector. The conducting row group, positive pole conducting row and negative pole conducting row are rigid metal parts, replace the layout of the soft wire in disorder. Realize the linear connection of the end plate joint of electricity core, reduce the cross wiring, reduce the space occupation, effectively avoided the interference with other components in the battery box.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to battery boxes and battery devices. Background Technology

[0002] In existing battery pack designs, a common approach is to install positive and negative output connectors on the end plate of the battery box, and then connect the positive and negative terminals of the battery cells inside the battery box to the corresponding output connectors via wires.

[0003] While this design can achieve current output, it has significant drawbacks in practical applications. Because the positive and negative wires need to be led out from the cell stacking direction and connected to the connectors on the end plate respectively, the wire layout is complex and the paths are redundant and cross. This not only occupies a lot of installation space, but also easily interferes with other components in the battery box (such as heat dissipation structures or sensors), causing wiring chaos.

[0004] Therefore, a battery box is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a battery box and battery device to solve the problem that connecting the positive and negative terminals of the battery cells inside the battery box to the corresponding output connectors by wires results in a complex wire layout, redundant and intersecting paths, which not only occupies a lot of installation space, but also easily interferes with other components (such as heat dissipation structures or sensors) inside the battery box, causing messy wiring.

[0006] In one aspect, this utility model provides a battery box, the battery box comprising:

[0007] The housing includes an end plate, the end plate having a through hole along a first horizontal direction, and the end plate being configured to house a battery module on one side along the first horizontal direction.

[0008] The output structure includes a positive terminal and a negative terminal, wherein the positive terminal and the negative terminal are passed through the through hole and fixedly connected to the end plate;

[0009] A conductive busbar assembly includes a connecting conductive busbar, a positive conductive busbar, and a negative conductive busbar. The connecting conductive busbar connects multiple individual cells of the battery module in series or parallel. The positive conductive busbar connects the positive output terminal of the battery module to the positive terminal connector. The negative conductive busbar connects the negative output terminal of the battery module to the negative terminal connector. The positive terminal connector and the negative terminal connector are used to connect electrical equipment.

[0010] In another aspect, this invention also provides a battery device, including the battery box in any of the above embodiments.

[0011] The above technical solution has the following beneficial effects:

[0012] The battery box includes a housing, an output structure, and a busbar assembly. The housing includes an end plate with a through hole along a first horizontal direction. A battery module is positioned on one side of the end plate along the first horizontal direction. The battery module is located on one side of the end plate along the first horizontal direction. The output structure includes a positive terminal and a negative terminal, which pass through the through hole and are fixed to the end plate. The busbar assembly includes a connecting busbar, a positive busbar, and a negative busbar. The connecting busbar connects multiple individual cells of the battery module in series or parallel. The positive busbar connects the positive output terminal of the battery module to the positive terminal, and the negative busbar connects the negative output terminal of the battery module to the negative terminal. The positive and negative terminals are used to connect electrical equipment. This battery box connects multiple individual cells in the battery module in series using the connecting busbar, connects the positive output terminal of the battery module to the positive terminal using the positive busbar, and connects the negative output terminal of the battery module to the negative terminal using the negative busbar. The conductive busbar is a rigid metal component that can be precisely stamped or bent into a fixed shape, replacing the messy layout of soft wires. It enables a straight connection between the battery cell and the end plate connector, reduces cross wiring, minimizes space occupation, and effectively avoids interference with other components in the battery box (such as heat dissipation structures or sensors). Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the battery box structure in an embodiment of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the battery box structure in an embodiment of the present invention. Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the battery box structure in an embodiment of the present invention (excluding the output structure).

[0016] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0017] Figure 5 for Figure 3 A magnified view of a section at point B in the middle;

[0018] Figure 6 This is a schematic diagram of the explosion of the battery box in an embodiment of the present invention. Figure 1 ;

[0019] Figure 7 for Figure 6 A magnified view of a section at point C;

[0020] Figure 8 This is a schematic diagram of the explosion of the battery box in an embodiment of the present invention. Figure 2 ;

[0021] Figure 9 for Figure 8 A magnified view of a section at point D.

[0022] In the picture:

[0023] X, first horizontal direction; Y, second horizontal direction; Z, vertical direction;

[0024] 1. Enclosure; 11. End plate; 111. Through hole;

[0025] 2. Battery module; 21. Positive output terminal; 22. Negative output terminal;

[0026] 3. Output structure; 31. Positive terminal; 32. Negative terminal;

[0027] 41. Connecting conductive busbar; 42. Positive conductive busbar; 421. Positive connection part; 422. Positive bending part; 4221. First positive plate; 4222. Second positive plate; 43. Negative conductive busbar; 431. Negative connection part; 4311. Negative clearance plate; 4312. Negative connection plate; 432. Negative bending part; 4321. First negative plate; 4322. Second negative plate; 44. Positive connector; 441. Positive support base; 442. Positive bolt; 443. Positive connecting piece; 444. Positive end cap; 45. Negative connector; 451. Negative support base; 452. Negative bolt; 453. Negative connecting piece; 454. Negative end cap;

[0028] 5. BMS board. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] The battery box refers to a closed or semi-closed structure made of materials such as metal and plastic. It is the physical carrier of the battery module 2. Its design and manufacturing must meet the safety, reliability and functionality requirements of the battery pack in different usage scenarios.

[0034] The housing 1 provides installation space for the battery module 2, BMS board, cooling system and conductive busbars, and fixes these components inside the housing 1 through reasonable structural design, ensuring that they maintain a relatively stable position during the operation of the battery device, and avoiding damage to components or loosening of connections due to vibration, impact and other factors.

[0035] Positive terminal 31 and negative terminal 32 are used for the positive and negative terminals of the output battery box.

[0036] The battery module 2 is formed by connecting multiple battery cells with similar capacity and internal resistance in series or in parallel, including a positive output electrode 21 and a negative output electrode 22.

[0037] like Figures 1 to 9 As shown, this embodiment provides a battery box, which includes a box body 1, an output structure 3 and a conductive busbar. The box body 1 includes a shell with a receiving cavity and an end plate 11 disposed in the receiving cavity. The end plate 11 divides the receiving cavity into a first cavity and a second cavity arranged sequentially along a first horizontal direction X. The end plate 11 is provided with a through hole 111 along the first horizontal direction X, and the through hole 111 connects the first cavity and the second cavity.

[0038] The battery module 2 is disposed on one side of the end plate 11 along the first horizontal direction X, and then disposed in the first cavity. The battery module 2 includes multiple rows of single cells arranged sequentially along the first horizontal direction X.

[0039] The output structure 3 includes a positive terminal 31 and a negative terminal 32. The positive terminal 31 and the negative terminal 32 are inserted through the through hole 111 and fixed to the end plate 11, so that one end of the positive terminal 31 is located in the first cavity and the other end is located in the second cavity, and one end of the negative terminal 32 is located in the first cavity and the other end is located in the second cavity.

[0040] The conductive busbar assembly includes a connecting conductive busbar 41, a positive conductive busbar 42, and a negative conductive busbar 43. The connecting conductive busbar 41 connects multiple individual cells of the battery module 2 in series. The positive terminal of one individual cell not connected to the connecting conductive busbar 41 is the output positive terminal 21, and the negative terminal of another individual cell not connected to the connecting conductive busbar 41 is the output negative terminal 22. The positive conductive busbar 42 is used to connect the output positive terminal 21 of the battery module 2 to the positive terminal connector 31, and the negative conductive busbar 43 is used to connect the output negative terminal 22 of the battery module 2 to the negative terminal connector 32.

[0041] The battery box connects multiple individual cells in the battery module 2 in series via connecting busbar 41. A positive busbar 42 connects the positive output terminal 21 of the battery module 2 to the positive terminal connector 31, and a negative busbar 43 connects the negative output terminal 22 of the battery module 2 to the negative terminal connector 32. The busbars are rigid metal components that can be precisely stamped or bent into a fixed shape, replacing the messy layout of flexible wires. This achieves linear connections, reduces cross-wiring, minimizes space occupation, and effectively avoids interference with other components (such as heat dissipation structures or sensors) within the box 1.

[0042] Optionally, the busbar assembly is made of copper; in other embodiments, it is made of aluminum.

[0043] Optionally, the positive electrode busbar 42 includes a positive electrode connection portion 421 and a positive electrode bending portion 422. The positive electrode connection portion 421 is connected to the output positive electrode 21, and the positive electrode bending portion 422 is disposed between the battery module 2 and the end plate 11 and connected to the positive electrode connector 31. The negative electrode busbar 43 includes a negative electrode connection portion 431 and a negative electrode bending portion 432. The negative electrode connection portion 431 is connected to the output negative electrode 22, and the negative electrode bending portion 432 is disposed between the battery module 2 and the end plate 11 and connected to the negative electrode connector 32. In this embodiment, the positive electrode connection portion 421 is responsible for connecting the output positive electrode 21 to the positive electrode bending portion 422. The positive electrode bending portion 422 itself is bent, thereby enabling the positive electrode bending portion 422 to connect to the positive electrode connector 31. The negative terminal connection part 431 is responsible for connecting the output negative terminal 22 to the negative terminal bending part 432. The negative terminal bending part 432 bends itself so that it can be connected to the negative terminal connector 32.

[0044] Optionally, the output positive electrode 21 is the positive electrode of a single cell of the battery module 2 near the end plate 11. The distance between the output positive electrode 21 and the end plate 11 along the first horizontal direction X is a mm, where 190 mm ≤ a mm ≤ 500 mm. The dimension of the positive electrode connection portion 421 along the first horizontal direction X is b mm, where 120 mm ≤ b mm ≤ 420 mm, and 10 mm ≤ a mm - b mm ≤ 80 mm. In this embodiment, this arrangement ensures that the positive electrode bending portion 422 is located precisely between the end plate 11 and the battery module 2, facilitating the connection between the positive electrode connector 31 between the end plate 11 and the battery module 2 and the positive electrode bending portion 422.

[0045] Optionally, the positive electrode bending portion 422 is fixedly connected to the end of the positive electrode connection portion 421 away from the output positive electrode 21 along the first horizontal direction X. The positive electrode bending portion 422 is perpendicular to the positive electrode connection portion 421 and inserted between the end plate 11 and the battery module 2. In this embodiment, the positive electrode bending portion 422 is perpendicular to the positive electrode connection portion 421, thereby allowing the positive electrode bending portion 422 to be inserted into the gap between the end plate 11 and the battery module 2, so that the positive electrode bending portion 422 can be opposite to the positive electrode connector 31.

[0046] Optionally, the positive electrode bending portion 422 includes a first positive electrode plate 4221 and a second positive electrode plate 4222. One end of the first positive electrode plate 4221 is connected to the positive electrode connection portion 421. The first positive electrode plate 4221 extends in the vertical direction Z. One end of the second positive electrode plate 4222 is fixedly connected to the other end of the first positive electrode plate 4221. The second positive electrode plate 4222 extends in the second horizontal direction Y. The first horizontal direction X and the second horizontal direction Y are perpendicular. In this embodiment, the first positive electrode plate 4221 extends in the vertical direction Z so that the second positive electrode plate 4222 and the positive electrode connector 31 are located at the same vertical height. The second positive electrode plate 4222 extends in the second horizontal direction Y so that the second positive electrode plate 4222 can be opposite to the positive electrode connector 31 in the first horizontal direction X, so that the positive electrode connector 31 and the second positive electrode plate 4222 are fixedly connected by bolts.

[0047] Optionally, the output negative electrode 22 is the negative electrode of a single cell in the battery module 2 away from the end plate 11. The negative electrode connection part 431 includes a negative electrode clearance plate 4311 and a negative electrode connection plate 4312. The negative electrode connection plate 4312 is disposed on the top wall or peripheral wall of the battery module 2 along the first horizontal direction X, and the negative electrode connection plate 4312 is spaced apart from the electrodes and the connecting conductive busbar 41 of the battery module 2. One end of the negative electrode clearance plate 4311 is connected to the output negative electrode 22, and the other end of the negative electrode clearance plate 4311 is connected to one end of the negative electrode connection plate 4312. The other end of the negative electrode connection plate 4312 is connected to the negative electrode bending plate. In this embodiment, since the negative electrode connection plate 4312 needs to extend from the side of the battery module 2 away from the end plate 11 to the side close to the end plate 11, the negative electrode connection plate 4312 needs to maintain a distance from the positive electrode, negative electrode and connecting conductive busbar 41 of the single cell to avoid short circuits and other situations. Therefore, the position of the negative electrode connecting plate 4312 on the battery module 2 is adjusted by the negative electrode clearance plate 4311 so that the negative electrode connecting plate 4312 is spaced apart from the electrodes and the connecting conductive bus 41 of the battery module 2 respectively.

[0048] Optionally, the negative electrode avoidance plate 4311 is a 180° arc plate. The negative electrode avoidance plate 4311 is attached to the side wall of the battery module 2 away from the end plate 11, so that one end of the negative electrode avoidance plate 4311 is connected to the output negative electrode 22, and the other end of the negative electrode avoidance plate 4311 is connected to the negative electrode connection plate 4312 on the top wall of the battery module 2.

[0049] Optionally, the length of the negative electrode connecting plate 4312 along the first horizontal direction X is cmm, where 2020mm ≤ cmm ≤ 2350mm, and the distance between the output negative electrode 22 and the end plate 11 along the first horizontal direction X is dmm, where 2030mm ≤ dmm ≤ 2360mm, and 10mm ≤ dmm - cmm ≤ 100mm. In this embodiment, this arrangement ensures that the negative electrode bending portion 432 is located precisely between the end plate 11 and the battery module 2, facilitating the connection between the negative electrode connector 32 between the end plate 11 and the battery module 2 and the negative electrode bending portion 432.

[0050] Optionally, the negative electrode bending portion 432 is fixedly connected to the other end of the negative electrode connecting plate 4312, and the negative electrode bending portion 432 is perpendicular to the negative electrode connecting plate 4312 and inserted between the end plate 11 and the battery module 2. In this embodiment, the negative electrode bending portion 432 is perpendicular to the negative electrode connecting portion 431, so that the negative electrode bending portion 432 is inserted in the gap between the end plate 11 and the battery module 2, so that the negative electrode bending portion 432 can be opposite to the negative electrode connector 32.

[0051] Optionally, the negative electrode bending portion 432 includes a first negative electrode plate 4321 and a second negative electrode plate 4322. One end of the first negative electrode plate 4321 is connected to the negative electrode connecting plate 4312. The first negative electrode plate 4321 extends in the vertical direction Z. One end of the second negative electrode plate 4322 is fixedly connected to the other end of the first negative electrode plate 4321. The second negative electrode plate 4322 extends in the second horizontal direction Y. In this embodiment, the first negative electrode plate 4321 extends in the vertical direction Z so that the second negative electrode plate 4322 and the negative electrode connector 32 are located at the same vertical height. The second negative electrode plate 4322 extends in the second horizontal direction Y so that the second negative electrode plate 4322 can be opposite to the negative electrode connector 32 in the first horizontal direction X, so that the negative electrode connector 32 and the second negative electrode plate 4322 are fixedly connected by bolts.

[0052] Optionally, the distance between the positive electrode bending portion 422 and the negative electrode bending portion 432 along the second horizontal direction Y is emm, where emm ≥ 10mm. In this embodiment, if the distance between the positive electrode bending portion 422 and the negative electrode bending portion 432 is too small, it is easy for the positive and negative electrodes to come into direct contact or form a short circuit through conductive materials, generating a large instantaneous current. This can not only damage the battery itself but may also cause safety accidents such as fire and explosion. At the same time, an excessively small distance will cause an abnormal increase in the electric field strength between the electrodes, leading to abnormal electrochemical reactions, resulting in problems such as increased battery self-discharge, rapid capacity decay, shortened cycle life, and increased internal resistance. Therefore, the distance between the positive electrode bending portion 422 and the negative electrode bending portion 432 along the second horizontal direction Y is emm ≥ 10mm to avoid short circuits and abnormal electric field problems.

[0053] Optionally, the busbar assembly further includes a positive electrode connector 44, which includes a positive electrode support 441, a positive electrode bolt 442, and a positive electrode connecting piece 443. The positive electrode support 441 is fixed to the top wall of the battery module 2. One end of the positive electrode connecting piece 443 is fixed to the output positive electrode 21, and the other end is disposed on the positive electrode support 441. The positive electrode connection portion 421 is stacked with the positive electrode connecting piece 443. The positive electrode bolt 442 passes through the positive electrode connection portion 421 and the positive electrode connecting piece 443 and is screwed to the positive electrode support 441. In this embodiment, the positive electrode support 441 is fixed to the battery cell where the output positive electrode 21 is located by screwing or snapping. The positive electrode support 441 is provided with a U-shaped groove. The other end of the positive electrode connecting piece 443 is disposed in the U-shaped groove, and the positive electrode connection portion 421 is disposed in the U-shaped groove and is stacked with the positive electrode connecting piece 443. The positive electrode bolt 442 passes through the positive electrode connection part 421 and the positive electrode connection piece 443 and is screwed to the positive electrode support base 441 to realize the electrical connection between the positive electrode connection part 421 and the positive electrode connection piece 443.

[0054] Optionally, the positive electrode support 441 is an insulating component.

[0055] Optionally, one end of the positive electrode connector 443 is welded to the output positive electrode 21.

[0056] Optionally, the positive terminal connector 44 further includes a positive terminal cover 444, which is detachably connected to the positive terminal support 441 so that the positive terminal cover 444 covers the positive terminal bolt 442. In this embodiment, the positive terminal cover 444 is inserted into the U-shaped groove of the positive terminal support 441 to cover the positive terminal bolt 442, preventing accidental short circuits and ensuring operational safety. By preventing metal objects from accidentally contacting the positive terminal bolt 442, it prevents short circuit accidents and electric shock injuries, while protecting the bolt from environmental factors, ensuring good electrical connection and extending service life.

[0057] Optionally, the positive end cap 444 is provided with a positive limit position recess. After the positive end cap 444 is connected to the positive electrode support 441, the screw head of the positive electrode bolt 442 is inserted into the positive limit position recess so that the positive end cap 444 restricts the rotation of the positive electrode bolt 442 and prevents the positive electrode bolt 442 from loosening.

[0058] Optionally, the positive end cap 444 is an insulating component.

[0059] Optionally, the busbar assembly further includes a negative electrode connector 45, which includes a negative electrode support 451, a negative electrode bolt 452, and a negative electrode connecting piece 453. The negative electrode support 451 is fixed to the top wall of the battery module 2. One end of the negative electrode connecting piece 453 is fixed to the output negative electrode 22, and the other end is disposed on the negative electrode support 451. The negative electrode connecting portion 431 is stacked with the negative electrode connecting piece 453. The negative electrode bolt 452 passes through the negative electrode connecting portion 431 and the negative electrode connecting piece 453 and is screwed to the negative electrode support 451. In this embodiment, the negative electrode support 451 is fixed to the battery cell where the output negative electrode 22 is located by screwing or snapping. The negative electrode support 451 is provided with a U-shaped groove. The other end of the negative electrode connecting piece 453 is disposed in the U-shaped groove, and the negative electrode connecting portion 431 is disposed in the U-shaped groove and is stacked with the negative electrode connecting piece 453. The negative electrode bolt 452 passes through the negative electrode connection part 431 and the negative electrode connection piece 453 and is screwed to the negative electrode support base 451 to realize the electrical connection between the negative electrode connection part 431 and the negative electrode connection piece 453.

[0060] Optionally, the negative electrode support 451 is an insulating component.

[0061] Optionally, one end of the negative electrode connector 453 is soldered to the output negative electrode 22.

[0062] Optionally, the negative terminal connector 45 further includes a negative terminal cap 454, which is detachably connected to the negative terminal support 451 so that the negative terminal cap 454 covers the negative terminal bolt 452. In this embodiment, the negative terminal cap 454 is inserted into the U-shaped groove of the negative terminal support 451 to cover the negative terminal bolt 452, preventing accidental short circuits and ensuring operational safety. By preventing metal objects from accidentally contacting the negative terminal bolt 452, it prevents short circuit accidents and electric shock injuries, while protecting the bolt from environmental factors, ensuring good electrical connection and extending service life.

[0063] Optionally, the negative end cap 454 is provided with a negative limit position recess. After the negative end cap 454 is connected to the negative electrode support 451, the screw head of the negative electrode bolt 452 is inserted into the negative limit position recess so that the negative end cap 454 restricts the rotation of the negative electrode bolt 452 and prevents the negative electrode bolt 452 from loosening.

[0064] Optionally, the negative end cap 454 is an insulating component.

[0065] Optionally, the outer periphery of the connecting busbar 41, the positive busbar 42, and the negative busbar 43 is covered with a buffer insulation layer. In this embodiment, the main purpose of the buffer insulation layer is to provide electrical insulation protection and mechanical buffer protection. It can effectively prevent short circuit faults caused by accidental contact between the copper busbar and other conductive components, ensuring the safe operation of the electrical system; at the same time, it can absorb and disperse mechanical stress, reducing mechanical damage to the copper busbar caused by vibration, thermal expansion and contraction, or external impact during installation and use, and protecting the structural integrity of the copper busbar. In addition, it can prevent harmful substances such as moisture and dust in the environment from corroding the surface of the copper busbar, improving its corrosion resistance, extending its service life, thereby ensuring the reliability and safety of the entire electrical connection system.

[0066] Optionally, the buffer insulation layer is foam.

[0067] Optionally, a BMS board 5 is provided between the end plate 11 and the battery module 2, with the positive electrode bend 422 and the BMS board 5 spaced apart, and the negative electrode bend 432 and the BMS board 5 also spaced apart. In this embodiment, the main purpose of the above arrangement is to ensure electrical safety and stable system operation. By maintaining an appropriate physical distance, accidental contact between the positive electrode bend 422 and the negative electrode bend 432 and the BMS board 5 can be effectively prevented, thus avoiding damage to sensitive electronic components from high current. Simultaneously, the spacing facilitates heat dissipation, preventing the copper busbar from overheating and affecting the normal operating temperature of the BMS board 5. Furthermore, the reasonable spacing facilitates maintenance, repair, and circuit inspection, providing operational space for subsequent installation, commissioning, and troubleshooting, ensuring that the battery management system can reliably monitor and protect the safe operation of the entire battery pack over a long period.

[0068] Optionally, the distance between the positive electrode bending portion 422 and the BMS plate 5 is Lmm, and the distance between the negative electrode bending portion 432 and the BMS plate 5 is Lmm, where Lmm ≥ 15mm.

[0069] Optionally, the positive electrode conductive bus 42 is a one-piece molded component, and / or the negative electrode conductive bus 43 is a one-piece molded component. In this embodiment, the one-piece molding eliminates welding joints and connection points, reduces contact resistance and voltage drop, improves conductivity, and reduces heat generation and energy loss caused by poor connection. The overall structure is more robust, avoiding the risk of mechanical failure caused by welding defects, loose bolts, etc., in traditional splicing methods. It reduces potential failure points, improves the overall safety and long-term operational stability of the system, simplifies the assembly process, reduces production costs, improves production efficiency, and ensures product consistency and quality control, providing a more reliable electrical connection solution for integrated battery systems.

[0070] This utility model also provides a battery device, including the battery box in the above solution. The battery device consists of a battery box, a battery module 2, a battery management system, a thermal management system, high-voltage electrical connections and safety devices, and auxiliary components (pressure relief valves and other fire extinguishing systems). The battery device is a core component that directly provides electrical energy in electric vehicles, energy storage systems, consumer electronics and other equipment.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery box, characterized in that, include: The housing (1) includes an end plate (11) with a through hole (111) along a first horizontal direction (X), and the end plate (11) is configured to house a battery module (2) on one side along the first horizontal direction (X). The output structure (3) includes a positive terminal connector (31) and a negative terminal connector (32), wherein the positive terminal connector (31) and the negative terminal connector (32) are inserted through the through hole (111) and fixedly connected to the end plate (11); The conductive busbar assembly includes a connecting conductive busbar (41), a positive conductive busbar (42), and a negative conductive busbar (43). The connecting conductive busbar (41) connects multiple individual cells of the battery module (2) in series or in parallel. The positive conductive busbar (42) is used to connect the output positive terminal (21) of the battery module (2) to the positive terminal connector (31). The negative conductive busbar (43) is used to connect the output negative terminal (22) of the battery module (2) to the negative terminal connector (32). The positive terminal connector (31) and the negative terminal connector (32) are used to connect electrical equipment.

2. The battery box according to claim 1, characterized in that, The positive electrode busbar (42) includes a positive electrode connection part (421) and a positive electrode bending part (422). The positive electrode connection part (421) is connected to the output positive electrode (21), and the positive electrode bending part (422) is disposed between the battery module (2) and the end plate (11) and connected to the positive electrode connector (31). The negative electrode busbar (43) includes a negative electrode connection part (431) and a negative electrode bending part (432). The negative electrode connection part (431) is connected to the output negative electrode (22), and the negative electrode bending part (432) is disposed between the battery module (2) and the end plate (11) and connected to the negative electrode connector (32).

3. The battery box according to claim 2, characterized in that, The output positive electrode (21) is the positive electrode of the single cell of the battery module (2) near the end plate (11). The distance between the output positive electrode (21) and the end plate (11) along the first horizontal direction (X) is amm, 190mm≤amm≤500mm. The size of the positive electrode connection part (421) along the first horizontal direction (X) is bmm, 120mm≤bmm≤420mm, 10mm≤amm-bmm≤80mm.

4. The battery box according to claim 3, characterized in that, The positive electrode bending portion (422) and the positive electrode connecting portion (421) are fixedly connected at one end away from the output positive electrode (21) along the first horizontal direction (X). The positive electrode bending portion (422) is perpendicular to the positive electrode connecting portion (421) and is inserted between the end plate (11) and the battery module (2).

5. The battery box according to claim 4, characterized in that, The positive electrode bending portion (422) includes a first positive electrode plate (4221) and a second positive electrode plate (4222). One end of the first positive electrode plate (4221) is connected to the positive electrode connection portion (421). The first positive electrode plate (4221) extends in the vertical direction (Z). One end of the second positive electrode plate (4222) is fixedly connected to the other end of the first positive electrode plate (4221). The second positive electrode plate (4222) extends in the second horizontal direction (Y). The first horizontal direction (X) and the second horizontal direction (Y) are perpendicular.

6. The battery box according to claim 2, characterized in that, The output negative electrode (22) is the negative electrode of the single cell of the battery module (2) away from the end plate (11). The negative electrode connection part (431) includes a negative electrode clearance plate (4311) and a negative electrode connection plate (4312). The negative electrode connection plate (4312) is disposed on the top wall or peripheral wall of the battery module (2) along the first horizontal direction (X). The negative electrode connection plate (4312) is spaced apart from the electrode of the battery module (2) and the connecting conductive bus (41). One end of the negative electrode clearance plate (4311) is connected to the output negative electrode (22). The other end of the negative electrode clearance plate (4311) is connected to one end of the negative electrode connection plate (4312). The other end of the negative electrode connection plate (4312) is connected to the negative electrode bending part (432).

7. The battery box according to claim 6, characterized in that, The length of the negative electrode connecting plate (4312) along the first horizontal direction (X) is cmm, 2020mm≤cmm≤2350mm, and the distance between the output negative electrode (22) and the end plate (11) along the first horizontal direction (X) is dmm, 2030mm≤dmm≤2360mm, 10mm≤dmm-cmm≤100mm.

8. The battery box according to claim 6, characterized in that, The negative electrode bending part (432) is fixedly connected to the other end of the negative electrode connecting plate (4312). The negative electrode bending part (432) is perpendicular to the negative electrode connecting plate (4312) and inserted between the end plate (11) and the battery module (2).

9. The battery box according to claim 8, characterized in that, The negative electrode bending portion (432) includes a first negative electrode plate (4321) and a second negative electrode plate (4322). One end of the first negative electrode plate (4321) is connected to the negative electrode connecting plate (4312). The first negative electrode plate (4321) extends in the vertical direction (Z). One end of the second negative electrode plate (4322) is fixed to the other end of the first negative electrode plate (4321). The second negative electrode plate (4322) extends in the second horizontal direction (Y). The first horizontal direction (X) and the second horizontal direction (Y) are perpendicular.

10. The battery box according to claim 2, characterized in that, The distance between the positive electrode bending portion (422) and the negative electrode bending portion (432) along the second horizontal direction (Y) is emm, where emm ≥ 10mm.

11. The battery box according to claim 2, characterized in that, The conductive busbar also includes a positive electrode connector (44), which includes a positive electrode support (441), a positive electrode bolt (442), and a positive electrode connecting piece (443). The positive electrode support (441) is fixed to the top wall of the battery module (2). One end of the positive electrode connecting piece (443) is fixed to the output positive electrode (21), and the other end is disposed on the positive electrode support (441). The positive electrode connection part (421) is stacked with the positive electrode connecting piece (443). The positive electrode bolt (442) passes through the positive electrode connection part (421) and the positive electrode connecting piece (443) and is screwed to the positive electrode support (441).

12. The battery box according to claim 11, characterized in that, The positive electrode connector (44) also includes a positive electrode cap (444), which is detachably connected to the positive electrode support (441) so that the positive electrode cap (444) covers the positive electrode bolt (442).

13. The battery box according to claim 2, characterized in that, The conductive busbar also includes a negative electrode connector (45), which includes a negative electrode support (451), a negative electrode bolt (452), and a negative electrode connecting piece (453). The negative electrode support (451) is fixed to the top wall of the battery module (2). One end of the negative electrode connecting piece (453) is fixed to the output negative electrode (22), and the other end is disposed on the negative electrode support (451). The negative electrode connection part (431) is stacked with the negative electrode connecting piece (453). The negative electrode bolt (452) passes through the negative electrode connection part (431) and the negative electrode connecting piece (453) and is screwed to the negative electrode support (451).

14. The battery box according to claim 13, characterized in that, The negative electrode connector (45) also includes a negative electrode cap (454), which is detachably connected to the negative electrode support (451) so that the negative electrode cap (454) covers the negative electrode bolt (452).

15. The battery box according to claim 1, characterized in that, The outer periphery of the connecting conductive bus (41), the positive conductive bus (42) and the negative conductive bus (43) are all covered with a buffer insulating layer.

16. The battery box according to claim 15, characterized in that, The buffer insulation layer is foam.

17. The battery box according to claim 2, characterized in that, A BMS board (5) is provided between the end plate (11) and the battery module (2). The positive electrode bending part (422) and the BMS board (5) are spaced apart, and the negative electrode bending part (432) and the BMS board (5) are spaced apart.

18. The battery box according to claim 17, characterized in that, The distance between the positive electrode bending part (422) and the BMS plate (5) is Lmm, and the distance between the negative electrode bending part (432) and the BMS plate (5) is Lmm, where Lmm ≥ 15mm.

19. The battery box according to claim 1, characterized in that, The positive electrode conductive bus (42) is a one-piece molded part; And / or, the negative electrode conductive bus (43) is an integrally formed part.

20. A battery device, characterized in that, Includes the battery box as described in any one of claims 1-19.

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