Battery pack and electric device

Abstract

The utility model provides a kind of battery pack and electric device, battery pack includes: battery box, including frame and the bottom wall being connected with frame, frame and bottom wall are enclosed and are accommodated cavity;Insulating beam is set in accommodating cavity and will be accommodated cavity separate first accommodating cavity and second accommodating cavity;First battery group is set in first accommodating cavity, first battery group has the first electrically conductive part being set towards insulating beam;Second battery group is set in second accommodating cavity, second battery group is spaced apart on the two sides of insulating beam along preset direction with first battery group, second battery group has the second electrically conductive part being set towards insulating beam, and the second electrically conductive part is oppositely set with first electrically conductive part;The distance L1mm between first electrically conductive part and second electrically conductive part and the thickness L2mm of insulating beam along preset direction satisfy the following relationship: 0.06≤L2mm / L1mm≤0.83.The application solves the problem that the electrically conductive column is set on one side of battery monomer assembly in related art, so that the risk of short circuit between electrically conductive columns is higher.

Description

Technical Field

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

[0002] Currently, with the increasing popularity of electric vehicles, the design and optimization of battery packs, the core component of their energy storage devices, has become particularly important. Battery packs not only bear the responsibility of supplying energy to the vehicle or energy storage device, but are also crucial for ensuring the overall safety of the vehicle.

[0003] In related technologies, a battery pack comprises multiple battery cell modules, each with a conductive post. To make the battery pack structure more compact in the vertical direction, the conductive post is typically positioned on one side of the battery cell module. As the demand for battery pack capacity increases in electric vehicles, the number of battery cell modules also increases, leading to a greater number of conductive posts within the battery pack. This increases the risk of short circuits between the conductive posts. During electric vehicle operation or even a collision, the battery pack experiences varying degrees of vibration, causing the conductive posts to shift and potentially short-circuit between two opposing conductive posts. This increases the likelihood of a short circuit in the battery pack, thereby posing a safety hazard.

[0004] Thus, in related technologies, placing the conductive posts on one side of the battery cell assembly increases the risk of short circuits between the conductive posts. Utility Model Content

[0005] The main objective of this invention is to provide a battery pack and power supply device to solve the problem in related technologies where the conductive posts are placed on one side of the battery cell assembly, resulting in a high risk of short circuits between the conductive posts.

[0006] To achieve the above objectives, according to one aspect of the present invention, a battery pack is provided, comprising: a battery housing, including a frame and a bottom wall connected to the frame, the frame and the bottom wall forming a receiving cavity; an insulating beam disposed within the receiving cavity and dividing the receiving cavity into a first receiving cavity and a second receiving cavity; a first battery pack disposed within the first receiving cavity, the first battery pack having a first conductive portion disposed towards the insulating beam; and a second battery pack disposed within the second receiving cavity, the second battery pack and the first battery pack being spaced apart on both sides of the insulating beam along a predetermined direction, the second battery pack having a second conductive portion disposed towards the insulating beam, the second conductive portion being disposed opposite to the first conductive portion; wherein the relationship between the distance L1mm between the first conductive portion and the second conductive portion and the thickness L2mm of the insulating beam along the predetermined direction satisfies: 0.06≤L2mm / L1mm≤0.83.

[0007] According to another aspect of the present invention, an electrical device is provided, including a battery pack, wherein the battery pack is the aforementioned battery pack.

[0008] Using the above technical solution, the battery pack includes: a battery housing, an insulating beam, a first battery pack, and a second battery pack. The battery housing includes a frame and a bottom wall connected to the frame, forming a receiving cavity. The insulating beam is disposed within the receiving cavity and divides the receiving cavity into a first receiving cavity and a second receiving cavity. The first battery pack is disposed within the first receiving cavity and has a first conductive portion facing the insulating beam. The second battery pack is disposed within the second receiving cavity, and the second battery pack and the first battery pack are spaced apart on both sides of the insulating beam along a predetermined direction. The second battery pack has a second conductive portion facing the insulating beam, and the second conductive portion is opposite to the first conductive portion. The distance L1mm between the first and second conductive portions and the thickness L2mm of the insulating beam along the predetermined direction satisfy the following relationship: 0.06≤L2mm / L1mm≤0.83. In this way, by placing the insulating beam between the opposing second conductive part and the first conductive part, the first and second conductive parts are effectively isolated. Even if vibration occurs during the driving or collision of the electric vehicle, causing displacement of the first and second battery packs, the insulating beam can still isolate the first and second conductive parts, preventing contact and reducing the risk of short circuits in the battery pack, thus greatly improving the overall safety of the battery pack. Furthermore, by controlling the ratio of the thickness L2mm of the insulating beam along a preset direction to the distance L1mm between the first and second conductive parts, operational space can be provided for wiring operations within the first battery pack while ensuring the compactness of the battery pack structure. The installation of the insulating beam improves the safety of the battery pack, and the L2mm / L1mm design achieves a balance between the compactness of the battery pack structure and the convenience of battery pack assembly. Therefore, the technical solution of this application effectively solves the problem in related technologies where placing the conductive post on one side of the battery cell assembly results in a high risk of short circuits between the conductive posts. Attached Figure Description

[0009] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0010] Figure 1 A perspective structural schematic diagram of an embodiment of the battery pack according to the present invention is shown;

[0011] Figure 2 It shows Figure 1 A cross-sectional view of the insulating beam when the battery pack does not show the insulating buffer layer and busbar;

[0012] Figure 3 It shows Figure 1 A cross-sectional view of the insulating beam of the battery pack.

[0013] The above figures include the following reference numerals:

[0014] 11. Frame; 12. Bottom wall;

[0015] 21. Insulating beam; 22. Insulating support plate; 221. Surface of insulating support plate facing away from the bottom wall; 23. Insulating flange; 231. Surface of insulating flange facing the bottom wall;

[0016] 30. First battery pack; 31. First conductive part; 311. Surface of the first conductive part facing away from the bottom wall; 32. Surface of the first battery pack facing away from the bottom wall;

[0017] 40. Second battery pack; 41. Second conductive part;

[0018] 51. Manifold; 52. Explosion-proof valve;

[0019] 60. Insulating buffer layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] like Figure 1 and Figure 2 As shown, in one embodiment of this application, the battery pack includes: a battery housing, an insulating beam 21, a first battery pack 30, and a second battery pack 40. The battery housing includes a frame 11 and a bottom wall 12 connected to the frame 11, the frame 11 and the bottom wall 12 forming a receiving cavity. The insulating beam 21 is disposed within the receiving cavity and divides the receiving cavity into a first receiving cavity and a second receiving cavity. The first battery pack 30 is disposed within the first receiving cavity, and the first battery pack 30 has a first conductive portion 31 disposed facing the insulating beam 21. The second battery pack 40 is disposed within the second receiving cavity, and the second battery pack 40 and the first battery pack 30 are spaced apart on both sides of the insulating beam 21 along a predetermined direction. The second battery pack 40 has a second conductive portion 41 disposed facing the insulating beam 21, and the second conductive portion 41 is disposed opposite to the first conductive portion 31. The relationship between the distance L1mm between the first conductive portion 31 and the second conductive portion 41 and the thickness L2mm of the insulating beam 21 along the predetermined direction satisfies: 0.06≤L2mm / L1mm≤0.83.

[0024] In this way, by placing the insulating beam 21 between the opposing second conductive part 41 and the first conductive part 31, the first conductive part 31 and the second conductive part 41 are effectively isolated. Even if vibration occurs during the driving or collision of the electric vehicle, causing displacement of the first battery pack 30 and the second battery pack 40, the insulating beam 21 can still isolate the first conductive part 31 and the second conductive part 41, avoiding contact between the first conductive part 31 and the second conductive part 41, reducing the risk of short circuit in the battery pack, and greatly improving the overall safety of the battery pack. Furthermore, by controlling the ratio of the thickness L2mm of the insulating beam 21 along a preset direction to the distance L1mm between the first conductive part 31 and the second conductive part 41, operating space can be provided for wiring operations within the first battery pack 30 while ensuring the structural compactness of the battery pack. The setting of the insulating beam 21 improves the safety of the battery pack, and the L2mm / L1mm design achieves a balance between the structural compactness of the battery pack and the convenience of battery pack assembly. Therefore, the technical solution of this application effectively solves the problem in related technologies where the conductive post is placed on one side of the battery cell assembly, resulting in a high risk of short circuit between the conductive posts.

[0025] Preferably, L2mm / L1mm is 0.06, 0.1, 0.14, 0.15, 0.18, 0.22, 0.26, 0.3, 0.34, 0.38, 0.42, 0.46, 0.52, 0.56, 0.6, 0.64, 0.68, 0.72, 0.76, 0.8, or 0.83.

[0026] like Figure 1 As shown, there is one insulating beam 21. Figure 2 As shown, the preset direction is the X direction. In embodiments not shown, when there are multiple insulating beams, the insulating beams can divide the receiving cavity into a third receiving cavity, a fourth receiving cavity, or more receiving cavities. For example, when there are three insulating beams, the three insulating beams divide the receiving cavity into a first receiving cavity, a second receiving cavity, a third receiving cavity, and a fourth receiving cavity. Correspondingly, a third battery pack is disposed in the third receiving cavity, and a fourth battery pack is disposed in the fourth receiving cavity. The third conductive part of the third battery pack and the fourth conductive part of the fourth battery pack are disposed on both sides of the corresponding insulating beam along a preset direction.

[0027] In some embodiments, the relationship between the distance L1mm between the first conductive part 31 and the second conductive part 41 and the thickness L2mm of the insulating beam 21 along a preset direction satisfies: 0.15≤L2mm / L1mm≤0.6. Furthermore, by controlling the ratio between the thickness L2mm of the insulating beam 21 along the preset direction and the distance L1mm between the first conductive part 31 and the second conductive part 41, it is possible to further provide operating space for wiring operations within the first battery pack 30 while ensuring the compactness of the battery pack structure, thus further achieving a balance between the compactness of the battery pack structure and the convenience of battery pack assembly.

[0028] like Figure 2 As shown, the distance L1mm between the first conductive part 31 and the second conductive part 41 satisfies: 60mm ≤ L1mm ≤ 150mm. Controlling the range of L1mm ensures that within the battery pack, there is sufficient distance between the first conductive part 31 and the second conductive part 41 to provide operating space for wiring operations, while also avoiding excessive looseness that would lead to wasted space. By setting the range of L1, an optimal balance can be found between ease of operation and space utilization, helping to maintain the compactness of the battery pack and thus improving energy density.

[0029] Preferably, L1mm is 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm or 150mm.

[0030] like Figure 2 As shown, the thickness L2mm of the insulating beam 21 along the preset direction satisfies: 10mm ≤ L2mm ≤ 50mm. Limiting the range of L2mm ensures that the insulating beam 21 provides electrical isolation without occupying excessive internal space of the battery pack. The lower limit of L2mm guarantees that the insulating beam 21 has sufficient strength and insulation performance, forming a stable insulation barrier inside the battery pack. Even under high-intensity vibration or impact, it can maintain isolation between the first conductive part 31 and the second conductive part 41, preventing short-circuit accidents and improving the safety of the battery pack. The upper limit of L2mm is controlled for space efficiency and cost considerations, avoiding additional material consumption and wasted internal space of the battery pack due to an excessively thick insulating beam 21, thus helping to maintain the lightweight and compact structure of the battery pack.

[0031] Preferably, L2mm is 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm or 50mm.

[0032] like Figure 2As shown, the battery pack also includes an insulating support plate 22 and an insulating flange 23. The insulating support plate 22 is disposed at the end of the insulating beam 21 away from the bottom wall 12, and extends along a predetermined direction on the side of the insulating beam 21 facing the first battery pack 30. The insulating flange 23 is disposed at the end of the insulating support plate 22 away from the insulating beam 21 and extends towards the bottom wall 12. Any plane perpendicular to the predetermined direction is defined as the predetermined plane, and the projection of the insulating flange 23 onto the predetermined plane is at least partially located within the range of the projection of the first battery pack 30 onto the predetermined plane. The introduction of the insulating support plate 22 and the insulating flange 23 can further enhance the electrical safety of the battery pack. Under high-intensity vibration or impact, the insulating support plate 22 and the insulating flange 23 can effectively disperse the impact force from the outside, reduce the pressure on the first battery pack 30, and improve the safety of the battery pack. Meanwhile, the projection of the insulating flange 23 in the preset plane is at least partially located within the projection range of the first battery pack 30 in the preset plane. This allows at least part of the insulating flange 23 to come into contact with the first battery pack 30 when it moves toward the second battery pack 40 during high-intensity vibration or collision, thereby restricting the movement of the first battery pack 30 and reducing the possibility of the first conductive part 31 on the first battery pack 30 colliding with the insulating beam 21. This makes the electrical connection of the first battery pack 30 more reliable and enhances the safety and reliability of the battery pack.

[0033] It should be noted that the projection of the insulating flange 23 in the preset plane is at least partially located within the range of the projection of the first battery pack 30 in the preset plane, which means that the projection of the insulating flange 23 in the preset plane is partially located within the range of the projection of the first battery pack 30 in the preset plane, or that the projection of the insulating flange 23 in the preset plane is entirely located within the range of the projection of the first battery pack 30 in the preset plane.

[0034] In some embodiments, the insulating beam 21, the insulating support plate 22, and the insulating flange 23 are integrally formed to improve structural strength and reduce processing difficulty.

[0035] like Figure 2As shown, the distance between the surface 32 of the first battery pack facing away from the bottom wall and the bottom wall 12 is greater than the distance between the surface 221 of the insulating support plate facing away from the bottom wall and the bottom wall 12. By adjusting the relative distances between the first battery pack 30 and the bottom wall 12, and between the insulating support plate 22 and the bottom wall 12, the insulating support plate 22 can better disperse the impact force from the outside during high-intensity vibration or collision. When the first battery pack 30 moves, the lower-height insulating support plate 22 can effectively abut against the surface of the first battery pack 30 facing the insulating beam 21, improving the limiting ability of the insulating support plate 22 on the first battery pack 30, reducing the displacement of the first battery pack 30 within the first receiving cavity, and enhancing the safety and reliability of the battery pack. Furthermore, setting the height of the insulating support plate 22 lower than that of the first battery pack 30 can reduce the space occupied in the height direction and improve the structural compactness of the battery pack.

[0036] like Figure 2 As shown, the distance between the surface 231 of the insulating flange facing the bottom wall and the bottom wall 12 is greater than the distance between the surface 311 of the first conductive part facing away from the bottom wall and the bottom wall 12. This arrangement allows the bottom surface of the insulating flange 23 to be higher than the top surface of the first conductive part 31, reducing the likelihood of collision between the insulating flange 23 and the first conductive part 31 when the first battery pack 30 moves due to high-intensity vibration or impact, thus reducing the impact on the first conductive part 31 and improving the reliability of the battery pack. Furthermore, the higher bottom surface of the insulating flange 23 allows operators to easily perform assembly or maintenance operations through the space between the insulating flange 23 and the first conductive part 31, improving operational convenience. Moreover, when the first battery pack 30 moves towards the insulating beam 21, the insulating flange 23 can abut against the surface of the first battery pack 30 where the first conductive part 31 is not located, thereby restricting the movement of the first battery pack 30, reducing the likelihood of collision between the first conductive part 31 on the first battery pack 30 and the insulating beam 21, and enhancing the safety and reliability of the battery pack. It should be noted that the height direction is the direction in which the bottom wall 12 supports the first battery pack 30.

[0037] In an embodiment not shown, the insulating flange makes contact with the first battery pack. This contact engagement between the insulating flange and the first battery pack allows for better contact, thereby restricting movement of the first battery pack, reducing the likelihood of collisions between the first conductive portion of the first battery pack and the insulating beam, and enhancing the safety and reliability of the battery pack.

[0038] like Figure 2As shown, the battery pack also includes an insulating support plate 22. The insulating support plate 22 is disposed at the end of the insulating beam 21 facing away from the bottom wall 12, and is located on the side of the insulating beam 21 facing the first battery pack 30 and extends along a predetermined direction. The distance between the surface of the first battery pack 30 facing away from the bottom wall 12 and the bottom wall 12 is greater than the distance between the surface of the insulating support plate 22 facing away from the bottom wall 12 and the bottom wall 12. When the first battery pack 30 moves, the lower insulating support plate 22 can effectively abut against the surface of the first battery pack 30 facing the insulating beam 21, improving the limiting ability of the insulating support plate 22 on the first battery pack 30, reducing the displacement of the first battery pack 30 within the first receiving cavity, and enhancing the safety and reliability of the battery pack. Furthermore, setting the height of the insulating support plate 22 lower than that of the first battery pack 30 can reduce the space occupied in the height direction and improve the structural compactness of the battery pack.

[0039] like Figure 2 As shown, the distance L3mm extending along the preset direction of the insulating support plate 22 satisfies: L3mm ≤ 20mm. Setting the range of L3mm ensures that the insulating support plate 22 provides sufficient support and isolation without unnecessarily occupying the internal space of the battery pack. The upper limit of L3mm prevents the insulating support plate 22 from being too long, thus avoiding ineffective occupation of the internal space of the battery pack and helping to maintain the compactness of the battery pack.

[0040] Preferably, L3mm is 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm or 20mm.

[0041] In some embodiments, the distance L3mm that the insulating support plate 22 extends along a preset direction is greater than the thickness of the first conductive portion 31 along the preset direction.

[0042] In an embodiment not shown, the insulating support plate makes contact with the first battery pack. This contact between the insulating support plate and the first battery pack allows for better contact, thereby restricting movement of the first battery pack, reducing the likelihood of collisions between the first conductive portion of the first battery pack and the insulating beam, and enhancing the safety and reliability of the battery pack.

[0043] like Figure 2 As shown, the distance L4mm between the insulating support plate 22 and the first conductive part 31 along a preset direction satisfies: L4mm ≤ 5mm. By controlling the range of L4mm, a suitable distance between the insulating support plate 22 and the first conductive part 31 can be ensured, thus avoiding unnecessary occupation of the internal space of the battery pack. By setting the maximum value of L4mm, the internal space of the battery pack is made reasonable, improving the structural compactness. Preferably, L4mm is 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm.

[0044] like Figure 3 As shown, an insulating buffer layer 60 is provided on the surface 221 of the insulating support plate facing away from the bottom wall. By providing the insulating buffer layer 60, the electrical safety and mechanical stability of the battery pack can be further improved. The insulating buffer layer 60 not only provides additional electrical insulation, ensuring effective electrical isolation between the first conductive part 31 and the second conductive part 41 and reducing the risk of short circuit, but also plays a buffering role when the battery pack is subjected to external impact or vibration, absorbing impact energy, reducing direct impact on the insulating beam 21, and reducing physical damage to the battery pack.

[0045] like Figure 3 As shown, an insulating buffer layer 60 is provided on the surface of the insulating beam 21 facing away from the bottom wall 12. By providing the insulating buffer layer 60, the electrical safety and mechanical stability of the battery pack can be further improved. The insulating buffer layer 60 not only provides additional electrical insulation, ensuring effective electrical isolation between the first conductive part 31 and the second conductive part 41 and reducing the risk of short circuits, but also plays a buffering role when the battery pack is subjected to external impacts or vibrations, absorbing impact energy, reducing direct impact on the insulating beam 21, and reducing physical damage to the battery pack.

[0046] like Figure 3 As shown, an insulating buffer layer 60 is provided on the surface 221 of the insulating support plate facing away from the bottom wall and on the surface of the insulating beam 21 facing away from the bottom wall 12. By providing the insulating buffer layer 60, the electrical safety and mechanical stability of the battery pack can be further improved. The insulating buffer layer 60 not only provides additional electrical insulation, ensuring effective electrical isolation between the first conductive part 31 and the second conductive part 41 and reducing the risk of short circuit, but also plays a buffering role when the battery pack is subjected to external impact or vibration, absorbing impact energy, reducing direct impact on the insulating beam 21, and reducing physical damage to the battery pack.

[0047] In some embodiments, the surface 221 of the insulating support plate facing away from the bottom wall is flush with the surface of the insulating beam 21 facing away from the bottom wall 12, so as to facilitate the processing of the insulating beam 21 and the insulating support plate 22, as well as the provision of the insulating buffer layer 60. The insulating buffer layer 60 is a foam layer.

[0048] In other embodiments, an insulating buffer layer is provided on the surface of the insulating support plate facing away from the bottom wall or on the surface of the insulating beam facing away from the bottom wall.

[0049] like Figure 3As shown, the first battery pack 30 includes multiple battery cell assemblies arranged along the extension direction of the insulating beam 21. Each battery cell assembly is provided with a first conductive part 31. The battery pack also includes a busbar 51 connected to the multiple first conductive parts 31, and the busbar 51 is disposed between the first conductive parts 31 and the insulating beam 21. As an important electrical connector inside the battery pack, the busbar 51 collects the current generated by the multiple battery cell assemblies through direct contact with the multiple first conductive parts 31. At the same time, by tightly distributing the busbar 51 between the first conductive parts 31 and the insulating beam 21, it is ensured that the busbar 51 and the second conductive part 41 can be insulated from each other through the insulating beam 21, further reducing the risk of short circuits. In addition, this design helps to simplify the internal layout of the battery pack, reduces the additional space required for electrical connectors, makes the battery pack more compact in the predetermined direction, and improves the space utilization and energy density of the battery pack.

[0050] In some embodiments, the second battery pack 40 also includes a plurality of battery cell assemblies arranged along the extension direction of the insulating beam 21. The distance L1mm between the first conductive portion 31 and the second conductive portion 41 refers to the distance between the first conductive portion 31 and the second conductive portion 41 of two corresponding battery cell assemblies located on both sides of the insulating beam 21. The structure of the insulating beam 21 facing the second battery pack 40 is arranged with reference to the insulating support plate 22 and the insulating flange 23.

[0051] like Figure 2 and Figure 3 As shown, the distance L5mm between the first conductive part 31 and the insulating beam 21 satisfies: L5mm≤25mm. The L5mm range design ensures an appropriate gap between the first conductive part 31 and the insulating beam 21, guaranteeing the compactness of the battery pack structure.

[0052] Preferably, L5mm is 5mm, 10mm, 15mm, 20mm or 25mm.

[0053] like Figure 2 and Figure 3 As shown, the distance L6mm between busbar 51 and insulating beam 21 satisfies: L6mm ≤ 23mm. The L6mm range design further refines the distance between busbar 51 and insulating beam 21, avoiding layout difficulties or excessive space occupation caused by excessively long busbar 51. Thus, by reasonably setting the ranges of L5mm and L6mm, the internal space utilization and structural compactness of the battery pack can be effectively balanced, improving the overall design level and performance of the battery pack.

[0054] Preferably, L6mm is 3mm, 5mm, 7mm, 10mm, 13mm, 15mm, 17mm, 20mm or 23mm.

[0055] like Figure 2 As shown, an explosion-proof valve 52 is installed on the side of the first battery pack 30 facing the insulating beam 21. The distance L7mm between the explosion-proof valve 52 and the insulating beam 21 satisfies the condition: L7mm≤24mm. As an important safety protection device for the first battery pack 30, the explosion-proof valve 52, by setting the distance L7 between itself and the insulating beam 21, can release pressure in a timely manner when the internal pressure of the first battery pack 30 is too high, avoiding serious safety accidents such as battery explosions. The upper limit of L7 ensures that the explosion-proof valve 52 does not excessively encroach on the internal space of the battery pack, maintaining the compactness and high energy density of the battery pack.

[0056] Preferably, L7mm is 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, or 24mm.

[0057] The battery pack in this embodiment includes a battery pack composed of multiple battery cells connected in series and / or parallel to form a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. These components are placed inside a battery housing and sealed with a cover, forming a complete functional unit capable of directly outputting electrical energy. The battery pack, as a rechargeable battery, is the power source for new energy vehicles. A battery pack generally includes cell modules, a battery management system (BMS) control module, and a battery housing that houses the cell modules and the BMS control module. The battery pack includes a battery housing and multiple battery cells housed within it. The battery housing is divided into upper and lower parts; the upper part includes a cover, and the lower part includes a frame and a bottom wall, with the two parts sealed together. The battery pack includes at least two cell units, a BMS control component, and a battery housing. A battery pack generally includes a battery housing and battery modules; the battery housing includes a lower battery housing (composed of a frame and a bottom wall) and a cover. A battery pack typically includes a battery housing, individual battery cells, and a separator. Both the individual battery cells and the separator are located within the battery housing. The separator is located on the side of the individual battery cells away from the bottom wall of the battery housing, separating the individual battery cells from other components located above them, thus providing isolation.

[0058] In this embodiment, the battery housing refers to a closed or semi-closed structure made of materials such as metal and plastic. It serves as the physical carrier for the first and second battery packs, and its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack under different usage scenarios. The battery housing provides installation space for the first and second battery packs, BMS, cooling system, electrical connection components, etc., and through reasonable structural design, fixes these components within the battery housing, ensuring they maintain a relatively stable position during battery pack operation and preventing damage or loosening of connections due to vibration, impact, or other factors. The battery housing includes a lower housing, which includes a bottom wall and side panels connected to and surrounding the bottom wall, forming a frame. An upper housing is connected to the side panels and has a cover plate opposite to the bottom wall. The upper and lower housings together form a receiving cavity. The battery housing of a battery pack generally consists of an upper housing and a lower housing. The lower housing typically has four side panels and a bottom wall. The four side panels can be integrally formed with the bottom wall or processed and fixedly connected separately. The battery enclosure may include a bottom and a cover, which fit together to define a space for accommodating the battery module. The battery enclosure can be cast from materials such as steel plate or aluminum alloy, or made from lightweight materials such as glass fiber reinforced composites or carbon fiber reinforced composites. The shape of the battery enclosure can be cylindrical, cuboid, or cubic.

[0059] In this embodiment, multiple battery cells with similar capacity and internal resistance are connected in series or in parallel to form a first battery pack. Multiple battery cells with similar capacity and internal resistance are connected in series or in parallel to form a second battery pack.

[0060] In this embodiment, both the first conductive part and the second conductive part are terminals. The terminals are used to electrically connect the electrode assembly located inside the battery housing to external devices (adjacent batteries or other electrical equipment) located outside the battery housing. The battery pack can discharge to external devices through the cell output terminals (tabs) and the external device output terminals (terminals), and an external power source can charge the battery through the terminals and tabs. The terminals can be directly electrically connected to the cell tabs or electrically connected to the tabs through metal adapters. The terminals are made of metals including, but not limited to, copper, aluminum, aluminum alloys, and copper-aluminum alloys.

[0061] The battery pack in this application is a secondary battery, also known as a rechargeable battery or accumulator, which refers to a battery that can be recharged after discharge to activate the active materials and continue to be used. Typically, a secondary battery includes an electrode assembly, an electrolyte, and an outer casing. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The electrode assembly and electrolyte are assembled inside the outer casing. During battery charging and discharging, active ions (such as lithium ions) move back and forth between the positive and negative electrode plates, inserting and extracting. The separator is positioned between the positive and negative electrode plates, primarily to prevent short circuits and allow active ions to pass through. The electrolyte is positioned between the positive and negative electrode plates, primarily to conduct active ions. As an example, the preparation process of a secondary battery is as follows: the positive electrode, separator, and negative electrode are stacked in sequence, with the separator positioned between the positive and negative electrode plates to provide isolation; then, the electrode assembly is obtained by winding or stacking; the electrode assembly is placed in the outer casing, dried, and then injected with electrolyte; after vacuum sealing, settling, formation, and shaping, the secondary battery is obtained.

[0062] This application also provides an electrical device including a battery pack, which is the aforementioned battery pack. Because the aforementioned battery pack can solve the problem in related technologies where the conductive posts are located on one side of the battery cell assembly, resulting in a high risk of short circuits between the conductive posts, the electrical device having this battery pack can solve the same technical problem.

[0063] The electrical devices covered in this application include, but are not limited to, vehicles, mobile phones, tablets, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be fuel-powered vehicles, natural gas vehicles, new energy vehicles, or rail vehicles; new energy vehicles can be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. When the electrical device is a vehicle, the battery pack can be located at the bottom, front, or rear of the vehicle.

[0064] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0065] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0066] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0067] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, include: The battery housing includes a frame (11) and a bottom wall (12) connected to the frame (11), the frame (11) and the bottom wall (12) forming a receiving cavity; An insulating beam (21) is disposed within the receiving cavity and divides the receiving cavity into a first receiving cavity and a second receiving cavity; A first battery pack (30) is disposed in the first receiving cavity, and the first battery pack (30) has a first conductive part (31) disposed toward the insulating beam (21); The second battery pack (40) is disposed in the second receiving cavity. The second battery pack (40) and the first battery pack (30) are disposed on both sides of the insulating beam (21) along a preset direction. The second battery pack (40) has a second conductive part (41) disposed facing the insulating beam (21). The second conductive part (41) is disposed opposite to the first conductive part (31). The relationship between the distance L1mm between the first conductive part (31) and the second conductive part (41) and the thickness L2mm of the insulating beam (21) along the preset direction satisfies: 0.06≤L2mm / L1mm≤0.

83.

2. The battery pack according to claim 1, characterized in that, The relationship between the distance L1mm between the first conductive part (31) and the second conductive part (41) and the thickness L2mm of the insulating beam (21) along the preset direction satisfies: 0.15≤L2mm / L1mm≤0.

6.

3. The battery pack according to claim 1, characterized in that, The distance L1mm between the first conductive part (31) and the second conductive part (41) satisfies: 60mm≤L1mm≤150mm.

4. The battery pack according to claim 1, characterized in that, The thickness L2mm of the insulating beam (21) along the preset direction satisfies: 10mm≤L2mm≤50mm.

5. The battery pack according to claim 1, characterized in that, The battery pack also includes an insulating support plate (22) and an insulating flange (23). The insulating support plate (22) is disposed at one end of the insulating beam (21) away from the bottom wall (12), and the insulating support plate (22) is disposed on the side of the insulating beam (21) facing the first battery pack (30) and extends along the preset direction. The insulating flange (23) is disposed at one end of the insulating support plate (22) away from the insulating beam (21) and extends towards the bottom wall (12). Any plane perpendicular to the preset direction is set as the preset plane, and the projection of the insulating flange (23) in the preset plane is at least partially located within the range of the projection of the first battery pack (30) in the preset plane.

6. The battery pack according to claim 5, characterized in that, The distance between the surface of the first battery pack (30) facing away from the bottom wall (12) and the bottom wall (12) is greater than the distance between the surface of the insulating support plate (22) facing away from the bottom wall (12) and the bottom wall (12).

7. The battery pack according to claim 5, characterized in that, The distance between the surface of the insulating flange (23) facing the bottom wall (12) and the bottom wall (12) is greater than the distance between the surface of the first conductive part (31) facing away from the bottom wall (12) and the bottom wall (12).

8. The battery pack according to claim 5, characterized in that, The insulating flange (23) is in contact with the first battery pack (30).

9. The battery pack according to claim 1, characterized in that, The battery pack also includes an insulating support plate (22), which is disposed at one end of the insulating beam (21) away from the bottom wall (12). The insulating support plate (22) is disposed on the side of the insulating beam (21) facing the first battery pack (30) and extends along the preset direction. The distance between the surface of the first battery pack (30) away from the bottom wall (12) and the bottom wall (12) is greater than the distance between the surface of the insulating support plate (22) away from the bottom wall (12) and the bottom wall (12).

10. The battery pack according to claim 9, characterized in that, The distance L3mm that the insulating support plate (22) extends along the preset direction satisfies: L3mm≤20mm.

11. The battery pack according to claim 9, characterized in that, The insulating support plate (22) is in contact with the first battery pack (30).

12. The battery pack according to claim 9, characterized in that, The distance L4mm between the insulating support plate (22) and the first conductive part (31) along the preset direction satisfies: L4mm≤5mm.

13. The battery pack according to claim 9, characterized in that, An insulating buffer layer (60) is provided on the surface of the insulating support plate (22) facing away from the bottom wall (12).

14. The battery pack according to claim 9, characterized in that, An insulating buffer layer (60) is provided on the surface of the insulating beam (21) facing away from the bottom wall (12).

15. The battery pack according to claim 1, characterized in that, The first battery pack (30) includes a plurality of battery cell assemblies arranged along the extension direction of the insulating beam (21), each of the battery cell assemblies being provided with the first conductive part (31), and the battery pack further includes a busbar (51) connected to the plurality of the first conductive parts (31), the busbar (51) being disposed between the first conductive parts (31) and the insulating beam (21).

16. The battery pack according to claim 15, characterized in that, The distance L5mm between the first conductive part (31) and the insulating beam (21) satisfies: L5mm≤25mm.

17. The battery pack according to claim 15, characterized in that, The distance L6mm between the busbar (51) and the insulating beam (21) satisfies: L6mm≤23mm.

18. The battery pack according to claim 1, characterized in that, An explosion-proof valve (52) is provided on the side of the first battery pack (30) facing the insulating beam (21), and the distance L7mm between the explosion-proof valve (52) and the insulating beam (21) satisfies: L7mm≤24mm.

19. An electrical device comprising a battery pack, characterized in that, The battery pack is the battery pack according to any one of claims 1 to 18.

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