Battery pack and electric device

Abstract

The utility model provides a kind of battery pack and electric equipment, wherein battery pack, comprising: box, reinforcing member is provided in box;Battery, battery is set in box, the side of battery towards reinforcing member is in contact with reinforcing member, the side of battery deviating reinforcing member has deformation space, wherein, when battery deformation, the side of battery towards reinforcing member is in contact with reinforcing member, the side of battery deviating reinforcing member deforms and enters into into deformation space.The technical scheme of the application effectively solves the problem that the battery in the related art is prone to abnormal explosion after long-term use.

Description

Technical Field

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

[0002] In the related technology, the battery is housed inside the casing, and is positioned adjacent to a liquid cooling plate, which can dissipate heat from the battery.

[0003] However, after the battery is assembled with the liquid cooling plate, the expansion space of the battery is small, and the battery is prone to abnormal explosion after long-term use. Utility Model Content

[0004] The main purpose of this utility model is to provide a battery pack and electrical equipment to solve the problem of the risk of abnormal explosion of batteries after long-term use in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery pack is provided, comprising: a housing, wherein a reinforcing member is disposed within the housing; and a battery disposed within the housing, wherein the side of the battery facing the reinforcing member contacts the reinforcing member, and the side of the battery away from the reinforcing member has a deformation space, wherein when the battery deforms, the side of the battery facing the reinforcing member abuts against the reinforcing member, and the side of the battery away from the reinforcing member deforms and enters the deformation space.

[0006] 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.

[0007] The battery pack, using the technical solution of this utility model, includes a housing and a battery. A reinforcing member is provided inside the housing. The battery is disposed inside the housing, with the side of the battery facing the reinforcing member in contact with it, and the side of the battery away from the reinforcing member having a deformation space. Specifically, when the battery deforms, the side of the battery facing the reinforcing member abuts against it, while the side of the battery away from the reinforcing member deforms and enters the deformation space. This deformation space provides expansion space for the battery, increasing the internal gas storage space and reducing the risk of abnormal battery explosion. Therefore, the technical solution of this application effectively solves the problem of the risk of abnormal battery explosion after prolonged use in related technologies. Attached Figure Description

[0008] 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:

[0009] Figure 1 A three-dimensional structural schematic diagram of a battery pack according to a first embodiment of the present invention is shown;

[0010] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the battery pack after longitudinal sectioning;

[0011] Figure 3 It shows Figure 2 An enlarged view of point A on the battery pack;

[0012] Figure 4 It shows Figure 1 A longitudinal sectional view of the battery pack;

[0013] Figure 5 It shows Figure 4 An enlarged view of point B on the battery pack;

[0014] Figure 6 It shows Figure 1 A simplified lateral structural diagram of the battery pack's battery and its buffer ribs;

[0015] Figure 7 A simplified lateral structural diagram of the battery and its buffer ribs according to Embodiment 2 of the battery pack of the present invention is shown.

[0016] Figure 8 A simplified end-view structural diagram of a battery pack according to Embodiment 3 of the present invention, with the battery and buffer alternately arranged.

[0017] The above figures include the following reference numerals:

[0018] 10. Box body;

[0019] 20. Reinforcing component; 21. First reinforcing component; 22. Second reinforcing component; 23. Third reinforcing component; 24. Fourth reinforcing component;

[0020] 30. Battery; 31. Deformation space; 32. First battery; 33. Second battery; 34. Third battery;

[0021] 40. Buffer component; 41. Buffer frame; 42. Buffer rib; 421. First buffer rib; 422. Second buffer rib; 423. Third buffer rib; 424. Fourth buffer rib. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] According to one aspect of this application, a battery pack is provided. One embodiment of the battery pack includes a housing 10 and a battery 30. A reinforcing member 20 is disposed within the housing 10. The battery 30 is disposed within the housing 10, with the side of the battery 30 facing the reinforcing member 20 in contact with the reinforcing member 20, and the side of the battery 30 facing away from the reinforcing member 20 having a deformation space 31. When the battery 30 deforms, the side of the battery 30 facing the reinforcing member 20 abuts against the reinforcing member 20, and the side of the battery 30 facing away from the reinforcing member 20 deforms and enters the deformation space 31.

[0026] In the first embodiment of the battery pack, the battery 30 deforms on the side opposite to the reinforcing member 20 and enters the deformation space 31. This deformation space 31 provides expansion space for the battery 30, increasing the internal gas storage space and reducing the risk of abnormal explosion. Therefore, the first embodiment of the battery pack effectively solves the problem of the risk of abnormal explosion of batteries after prolonged use in related technologies.

[0027] like Figures 1 to 5 As shown, the battery pack also includes a buffer 40 disposed within the deformation space 31. The strength of the buffer 40 is less than that of the reinforcing member 20. With the buffer 40 introduced, the battery 30 can compress the buffer 40 when expanding, instead of directly acting on the housing 10 or the reinforcing member 20, thus preventing insufficient gas storage space inside the battery 30. Since the buffer 40 is weaker than the reinforcing member 20, when the battery 30 expands, the buffer 40, being the weaker component, is more prone to deformation, absorbing expansion energy and providing sufficient expansion space for the battery 30.

[0028] like Figures 3 to 5 As shown, the range of the ratio of the width W1mm of the buffer 40 to the width W2mm of the deformation space 31 in the width direction X of the battery 30 is defined. By controlling the ratio of W1mm / W2mm to 1, sufficient expansion space is ensured for the battery 30, while not excessively occupying the internal space of the housing 10, thus maintaining good heat dissipation efficiency and structural compactness.

[0029] like Figures 3 to 5 As shown, in the width direction of the battery 30, the width W1mm of the buffer 40 satisfies: 1mm ≤ W1mm ≤ 10mm. By limiting the size range of the width W1mm of the buffer 40, sufficient deformation space 31 can be ensured when the battery 30 expands, avoiding excessive occupation of the heat dissipation path. If the buffer 40 is less than 1mm and too narrow, it may not be able to effectively absorb the expansion of the battery 30; if the buffer 40 is greater than 10mm and too wide, it will reduce the contact area between the battery 30 and the reinforcing member 20, affecting the heat conduction efficiency.

[0030] The width W1mm of the buffer 40 is preferably 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7.0mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8.0mm, 8.2mm, 8.4mm, 8.6mm, 8.8mm, 9.0mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm, or 10.0mm.

[0031] like Figures 3 to 5 As shown, in the width direction of battery 30, the width W2mm of deformation space 31 satisfies: 1mm≤W2mm≤10mm. By limiting the width range of deformation space 31, the internal gas storage space of battery 30 is increased during expansion without excessively compressing battery 30, ensuring the safety of battery 30 and the overall stability of battery pack. The reasonable width of deformation space 31 ensures that the expansion of battery 30 can occur within a preset range, preventing the risk of abnormal explosion of battery 30 due to insufficient space.

[0032] The width W2mm of the deformation space 31 is preferably 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7.0mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8.0mm, 8.2mm, 8.4mm, 8.6mm, 8.8mm, 9.0mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm, or 10.0mm.

[0033] Furthermore, the buffer 40 can be a foam layer, a silicone layer, or a thermally conductive layer. This choice of materials provides different levels of cushioning capacity and thermal conductivity, allowing designers to flexibly configure it according to the expansion characteristics and thermal management requirements of the battery 30.

[0034] like Figures 3 to 6As shown, the buffer 40 includes a buffer frame 41. The buffer frame 41 defines a regular frame, which can keep the position and shape of the buffer 40 basically stable even when the battery 30 expands, which is conducive to the uniform expansion of the battery 30.

[0035] like Figures 3 to 6 As shown, the buffer 40 also includes a buffer rib 42 disposed within the buffer frame 41. By increasing the structural elements inside the buffer frame 41, the contact area with the battery 30 is increased, so that the buffer 40 deforms smoothly when subjected to expansion, which is beneficial to the uniform expansion of the battery 30.

[0036] like Figures 3 to 6 As shown, the buffer ribs 42 include multiple ribs, which are spaced apart along the length of the battery 30. The spaced buffer ribs 42 along the length of the battery 30 can ensure a more uniform stress distribution when the battery 30 expands, which helps to balance the temperature of the battery 30.

[0037] like Figures 3 to 6 As shown, along the length Y of the battery 30, two adjacent buffer ribs 42 at the middle position are designated as the first buffer rib 421 and the second buffer rib 422, respectively. The first buffer rib 421 or the second buffer rib 422 is located on the vertical centerline C1 of the battery 30. The first buffer rib 421 or the second buffer rib 422 on the vertical centerline C1 provides symmetrical support, ensuring that the battery 30 remains upright and does not tilt during expansion, which helps maintain the safety of the battery pack.

[0038] It should be noted that the vertical center line C1 is the bisector of the length of the battery 30.

[0039] like Figure 5 and Figure 6 As shown, the first distance H1mm between the first buffer rib 421 and the second buffer rib 422 satisfies: 0mm ≤ H1mm ≤ 10mm. By limiting the distance between the first buffer rib 421 and the second buffer rib 422, the expansion limit of the battery 30 can be controlled, avoiding the risk of explosion due to excessive expansion. Furthermore, the appropriate distance range prevents the battery 30 from contacting other components after excessive expansion, reducing the possibility of short circuits and ensuring the safety of the battery pack.

[0040] The first distance H1mm between the first buffer rib 421 and the second buffer rib 422 is preferably 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm.

[0041] In Embodiment Two of the battery pack, the difference from Embodiment One lies in the arrangement of the multiple buffer ribs. For example... Figure 7As shown, the buffer ribs 42 include multiple ribs, which are spaced apart along the height direction of the battery 30. The buffer ribs 42 spaced apart along the height direction of the battery 30 can also evenly distribute the stress caused by expansion, enhance the vertical support of the buffer ribs 40, and maintain the stability of the internal structure of the battery pack.

[0042] like Figure 7 As shown in Embodiment 2 of the battery pack, in the height direction Z of the battery 30, two adjacent buffer ribs 42 at the middle position of the plurality of buffer ribs 42 are respectively the third buffer rib 423 and the fourth buffer rib 424. The third buffer rib 423 or the fourth buffer rib 424 is located on the lateral centerline C2 of the battery 30. The third buffer rib 423 and the fourth buffer rib 424 on the lateral centerline C2 enhance the balanced support of the battery pack in the lateral direction, avoiding the risk of explosion caused by the lateral expansion of the battery pack.

[0043] It should be noted that the horizontal center line C2 is the bisector of the height direction of the battery (30).

[0044] like Figure 7 As shown, in Embodiment 2 of the battery pack, the second distance H2mm between the third buffer rib 423 and the fourth buffer rib 424 satisfies: 0mm≤H2mm≤10mm. Limiting the size range of the second distance H2mm can further optimize the control of the lateral expansion of the battery 30, maintain the stability of the lateral dimensions of the battery pack, and reasonably control the limit of the lateral expansion of the battery pack, reducing the risk of explosion caused by the lateral expansion of the battery pack.

[0045] The second distance H2mm between the third buffer rib 423 and the fourth buffer rib 424 is preferably 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm.

[0046] like Figure 4 and Figure 5 As shown, along the width direction X of the battery 30, there are multiple reinforcing members 20, and multiple batteries 30 are spaced apart. Among the multiple batteries 30, there are adjacent first batteries 32 and second batteries 33. Among the multiple reinforcing members 20, there are adjacent first reinforcing members 21 and second reinforcing members 22. The first batteries 32 and second batteries 33 are both located between the first reinforcing members 21 and second reinforcing members 22, and the opposite sides of the first batteries 32 and second batteries 33 respectively contact and cooperate with the first reinforcing members 21 and second reinforcing members 22. A deformation space 31 is provided between the first batteries 32 and second batteries 33. By providing a deformation space 31 between the multiple batteries 30, the expansion problem of each battery 30 can be handled independently, improving the overall safety and reliability of the battery pack. In particular, the independent deformation space 31 prevents the expansion of one battery 30 from affecting the adjacent batteries 30, reducing the possibility of a chain reaction.

[0047] like Figure 4 and Figure 5 As shown, the battery pack also includes a buffer 40 disposed within the deformation space 31, with the buffer 40 positioned on the first battery 32 and the second battery 33. By directly placing the buffer 40 on the first battery 32 and the second battery 33, the energy from the expansion of the batteries 30 can be absorbed more directly, making the buffering effect more timely and effective, and reducing the risk of the entire battery pack bursting due to localized expansion.

[0048] In Embodiment 3 of the battery pack, the difference from Embodiment 1 lies in the arrangement of the multiple reinforcing members and the multiple batteries. For example... Figure 8 As shown, along the width direction X of the battery 30, there are at least two reinforcing members 20, and multiple batteries 30 arranged at intervals. The reinforcing members 20 and batteries 30 are arranged alternately. Any two adjacent reinforcing members 20 are designated as the third reinforcing member 23 and the fourth reinforcing member 24, respectively. The battery 30 located between the third reinforcing member 23 and the fourth reinforcing member 24 is the third battery 34. The first side of the third battery 34 contacts and engages with the third reinforcing member 23. A deformation space 31 is provided between the second side of the third battery 34 and the fourth reinforcing member 24. The alternating arrangement of the batteries 30 and reinforcing members 20, combined with the design of the deformation space 31, fully utilizes the internal space of the housing 10. Simultaneously, the deformation space 31 and the buffer member 40 ensure the safety of each battery 30 unit, balancing high density and safety.

[0049] like Figure 8 As shown, in Embodiment 3 of the battery pack, the battery pack also includes a buffer member 40 disposed within the deformation space 31. The buffer member 40 is disposed on the second side of the third battery 34 and the fourth reinforcing member 24. By directly disposing the buffer member 40 on the second side of the third battery 34 and the fourth reinforcing member 24, the energy of the battery 30 expansion can be absorbed more directly, making the buffering effect more timely and effective, and reducing the risk of the entire battery pack bursting due to local expansion.

[0050] like Figures 1 to 4 As shown, the reinforcing member 20 is made of iron, steel, aluminum, or an alloy. Using reinforcing members 20 made of iron, steel, aluminum, or alloy materials provides sufficient mechanical strength while also exhibiting good thermal conductivity, enhancing the thermal management and structural stability of the battery pack. These metallic materials ensure structural robustness and, due to their excellent thermal conductivity, improve the heat dissipation efficiency of the battery 30, reducing the risk of overheating.

[0051] like Figures 1 to 4 As shown, the reinforcing member 20 is a reinforcing plate or a heat exchange plate. As a reinforcing member 20, the reinforcing plate or heat exchange plate not only provides physical support but also promotes rapid heat conduction.

[0052] The heat exchange plate preferably includes a liquid-cooled plate or a multi-functional elastic sandwich liquid-cooled plate. Both the liquid-cooled plate and the multi-functional elastic sandwich liquid-cooled plate include harmonica tubes made of aluminum alloy. This liquid-cooled plate has excellent extrusion processing performance and high elongation, allowing it to adapt to the expansion and contraction of the battery cell. Multiple harmonica tubes are included. The heat exchange plate also includes current collectors, which are interconnected with the harmonica tubes. Coolant flows from one current collector into the harmonica tube, passes through multiple harmonica tubes, and then flows out from another current collector, achieving heat exchange and cooling and absorbing heat from the battery cell.

[0053] In this application, the enclosure refers to a closed or semi-closed structure made of materials such as metal and plastic, which serves as the physical carrier of the battery pack. Its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack under different usage scenarios. The enclosure provides installation space for the battery pack, BMS, cooling system, electrical connection components, etc., and through reasonable structural design, fixes these components inside the enclosure to ensure that they maintain a relatively stable position during battery pack operation, avoiding damage to components or loosening of connections due to vibration, impact, or other factors.

[0054] The enclosure can be cast from materials such as steel plates and aluminum alloys, or lightweight materials such as glass fiber reinforced composites and carbon fiber reinforced composites. The shape of the enclosure can be cylindrical, cuboid, cube, etc.

[0055] The aforementioned battery pack includes a battery pack composed of multiple batteries connected in series and / or in 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. All of these components are placed inside a housing and sealed with a cover plate to form a complete functional unit that can directly output electrical energy.

[0056] The aforementioned batteries can be secondary or primary batteries, and can also be lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, or magnesium-ion batteries, etc., but this embodiment of the invention is not limited to these. Batteries can be cylindrical, flat, cuboid, or other shapes, but this embodiment of the invention is not limited to these shapes either. Batteries are generally classified into three types according to their packaging method: cylindrical batteries, square batteries, and pouch batteries, but this embodiment of the invention is not limited to these types either.

[0057] For example, a battery may include a casing, a cell, and an electrolyte, with the casing housing the cell and electrolyte. The cell also includes a separator. Batteries primarily function by the movement of metal ions between the positive and negative electrodes.

[0058] The battery cell may have terminals or other components connected to adapters, with the terminals serving as the electrical connection points. Furthermore, the battery cell typically includes a pressure relief section. In the event of excessive internal pressure (e.g., thermal runaway), this section releases substances (e.g., gases, liquids, particulate matter) from the cell's interior, reducing internal pressure and preventing rapid pressurization that could lead to dangerous accidents such as cell explosions. For example, the pressure relief section can be an explosion-proof valve or explosion-proof plate. The adapter is preferably a connecting plate, and preferably a conductive structure. Any adjacent positive and negative electrodes are separated by a diaphragm.

[0059] The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc.

[0060] The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0061] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure. A wound cell is generally manufactured by winding continuous positive and negative electrodes and a separator, with the separator located between adjacent positive and negative electrodes. A stacked cell is manufactured by stacking positive and negative electrodes and a separator, where the positive and negative electrodes are separated by a separator, and adjacent layers of positive and / or negative electrodes within the cell are discontinuous. The stacking process includes layering or Z-shaped folding, etc. The embodiments of this application are not limited to these.

[0062] According to another aspect of this application, an electrical device is provided, including a battery pack capable of providing electrical energy to the device. The battery pack is the aforementioned type. Because the aforementioned battery pack can solve the problem of the risk of abnormal explosion after prolonged use of batteries in related technologies, the electrical device including this battery pack can solve the same technical problem.

[0063] The electrical equipment disclosed in this utility model embodiment can be, but is not limited to, vehicles, mobile phones, tablets, laptops, ships, spacecraft, electric toys, and power tools, etc. 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 equipment 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 a quantity of 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 housing (10) is provided with a reinforcing member (20) inside the housing (10); A battery (30) is disposed inside the housing (10). The side of the battery (30) facing the reinforcing member (20) is in contact with the reinforcing member (20). The side of the battery (30) away from the reinforcing member (20) has a deformation space (31). When the battery (30) deforms, the side of the battery (30) facing the reinforcing member (20) abuts against the reinforcing member (20), and the side of the battery (30) away from the reinforcing member (20) deforms and enters the deformation space (31).

2. The battery pack according to claim 1, characterized in that, The battery pack also includes a buffer (40) disposed in the deformation space (31), the strength of the buffer (40) being less than the strength of the reinforcing member (20).

3. The battery pack according to claim 2, characterized in that, In the width direction (X) of the battery (30), the ratio of the width W1mm of the buffer (40) to the width W2mm of the deformation space (31) is 1.

4. The battery pack according to claim 3, characterized in that, In the width direction of the battery (30), the width W1mm of the buffer (40) satisfies: 1mm≤W1mm≤10mm.

5. The battery pack according to claim 3, characterized in that, In the width direction of the battery (30), the width W2mm of the deformation space (31) satisfies: 1mm≤W2mm≤10mm.

6. The battery pack according to claim 2, characterized in that, The buffer (40) is a foam layer, a silicone layer, or a thermally conductive layer.

7. The battery pack according to claim 2, characterized in that, The buffer (40) includes a buffer frame (41).

8. The battery pack according to claim 7, characterized in that, The buffer (40) also includes a buffer rib (42) disposed within the buffer frame (41).

9. The battery pack according to claim 8, characterized in that, The buffer ribs (42) include a plurality of buffer ribs (42), which are spaced apart along the length direction (Y) of the battery (30).

10. The battery pack according to claim 8, characterized in that, Along the length direction (Y) of the battery (30), two adjacent buffer ribs (42) at the middle position of the plurality of buffer ribs (42) are respectively the first buffer rib (421) and the second buffer rib (422), and the first buffer rib (421) or the second buffer rib (422) is located on the vertical center line (C1) of the battery (30).

11. The battery pack according to claim 10, characterized in that, The first distance H1mm between the first buffer rib (421) and the second buffer rib (422) satisfies: 0mm≤H1mm≤10mm.

12. The battery pack according to claim 8, characterized in that, The buffer ribs (42) include a plurality of buffer ribs (42), which are spaced apart along the height direction (Z) of the battery (30).

13. The battery pack according to claim 12, characterized in that, In the height direction (Z) of the battery (30), two adjacent buffer ribs (42) at the middle position of the plurality of buffer ribs (42) are respectively the third buffer rib (423) and the fourth buffer rib (424), and the third buffer rib (423) or the fourth buffer rib (424) is located on the transverse center line (C2) of the battery (30).

14. The battery pack according to claim 13, characterized in that, The second distance H2mm between the third buffer rib (423) and the fourth buffer rib (424) satisfies: 0mm≤H2mm≤10mm.

15. The battery pack according to claim 1, characterized in that, Along the width direction (X) of the battery (30), there are multiple reinforcing members (20), and multiple batteries (30) are spaced apart. Among the multiple batteries (30), there are adjacent first batteries (32) and second batteries (33). Among the multiple reinforcing members (20), there are adjacent first reinforcing members (21) and second reinforcing members (22). The first battery (32) and the second battery (33) are both located between the first reinforcing member (21) and the second reinforcing member (22), and the opposite sides of the first battery (32) and the second battery (33) respectively contact and cooperate with the first reinforcing member (21) and the second reinforcing member (22). The deformation space (31) is disposed between the first battery (32) and the second battery (33).

16. The battery pack according to claim 15, characterized in that, The battery pack also includes a buffer (40) disposed within the deformation space (31), the buffer (40) being disposed on the first battery (32) and the second battery (33).

17. The battery pack according to claim 1, characterized in that, Along the width direction (X) of the battery (30), there are at least two reinforcing members (20) and multiple batteries (30) arranged at intervals. The multiple reinforcing members (20) and the multiple batteries (30) are arranged alternately. Any two adjacent reinforcing members (20) are respectively the third reinforcing member (23) and the fourth reinforcing member (24). The battery (30) located between the third reinforcing member (23) and the fourth reinforcing member (24) is the third battery (34). The first side of the third battery (34) is in contact with the third reinforcing member (23). The deformation space (31) is disposed between the second side of the third battery (34) and the fourth reinforcing member (24).

18. The battery pack according to claim 17, characterized in that, The battery pack also includes a buffer (40) disposed in the deformation space (31), the buffer (40) being disposed on the second side of the third battery (34) and the fourth reinforcing member (24).

19. The battery pack according to claim 1, characterized in that, The reinforcing member (20) is made of iron, steel, aluminum, or alloy.

20. The battery pack according to claim 1, characterized in that, The reinforcing member (20) is a reinforcing plate or a heat exchange plate.

21. 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 20.

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