Battery, battery pack, battery pack and electric device

Abstract

The invention provides a battery, a battery pack, a battery pack and a power utilization device, and relates to the technical field of batteries, the battery comprises a shell, the shell comprises a pole plate, a first side plate and a second side plate, the first side plate and the second side plate are connected to the two connected sides of the pole plate, the outer surface area of the first side plate is larger than the outer surface area of the second side plate, and the first side plate is connected with the second side plate; the outer surface area of the first side plate is larger than that of the pole plate, the pole plate comprises a main body part and a lug boss connected with the main body part, and the first side of the lug boss extends to the edge of the first side of the pole plate and is in butt joint with the first side plate; the pole is arranged on the pole plate; wherein the ratio of the surface area of the convex part to the outer surface area of the main body part is greater than or equal to 0.2 and less than or equal to 0.45, so that the problem that the pole column plate of the battery in the related technology is easy to deform is solved.

Description

Technical Field

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

[0002] The battery packs in the relevant technologies include multiple batteries. As the battery capacity increases, the internal electrochemical reactions of the batteries need to be more intense. The traditional battery structure is not strong enough. During the use of the battery pack, impacts and vibrations can easily deform the battery's terminal plates. Summary of the Invention

[0003] The main objective of this invention is to provide a battery, battery pack, battery module, and power supply device to solve the problem of easy deformation of the battery terminal plates in related technologies.

[0004] To achieve the above objectives, according to one aspect of the present invention, a battery is provided, comprising: a housing, the housing including an electrode plate, a first side plate and a second side plate, the first side plate and the second side plate being connected to each other on both sides of the electrode plate, the outer surface area of ​​the first side plate being larger than the outer surface area of ​​the second side plate, the outer surface area of ​​the first side plate being larger than the outer surface area of ​​the electrode plate, the electrode plate including a main body portion and a protrusion portion connected to the main body portion, a first side of the protrusion portion extending to a first side edge of the electrode plate and abutting against the first side plate; and an electrode post disposed on the electrode plate; wherein the ratio of the surface area of ​​the protrusion portion to the outer surface area of ​​the main body portion is greater than or equal to 0.2 and less than or equal to 0.45.

[0005] According to another aspect of the present invention, a battery pack is provided, comprising a plurality of batteries and at least one heat exchanger. The batteries are as described above. The plurality of batteries include a first battery and a second battery arranged adjacent to each other along a first direction. A first side plate of the first battery is arranged facing the first side plate of the second battery in the first direction. In the first direction, at least one heat exchanger is arranged on at least one side of the first battery and the second battery that are opposite to each other. In a second direction that intersects the first direction, there are a plurality of first batteries and second batteries. The first direction and the second direction intersect on a horizontal plane.

[0006] According to another aspect of the present invention, a battery pack is provided, including a housing and a battery pack disposed in the housing, the battery pack being the aforementioned battery pack, the battery pack further including a heat insulation member disposed between a first battery and a second battery, the lower part of the battery pack and the bottom of the housing being bonded together by a first adhesive layer, and a second adhesive layer being disposed on the upper part of the battery pack.

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

[0008] According to the technical solution of this invention, the battery includes a casing and terminals. The casing includes a terminal plate, a first side plate, and a second side plate. The first and second side plates are connected to the two connected sides of the terminal plate. The outer surface area of ​​the first side plate is larger than that of the second side plate, and the outer surface area of ​​the first side plate is larger than that of the terminal plate. The terminal plate includes a main body and a protrusion connected to the main body. The first side of the protrusion extends to the edge of the first side of the terminal plate and is abutted to the first side plate. The terminals are disposed on the terminal plate. Thus, since the first side of the protrusion is abutted to the first side plate, the structural stability of the protrusion itself is ensured. Simultaneously, the protrusion changes the cross-sectional shape of the terminal plate, increases its moment of inertia, and stably strengthens the structure of the terminal plate, reducing the problem of easy deformation of the terminal plate. Furthermore, the ratio of the surface area of ​​the protrusion to the outer surface area of ​​the main body is greater than or equal to 0.2 and less than or equal to 0.45. In this way, the ratio of the surface area of ​​the protrusion to the outer surface area of ​​the main body can effectively disperse stress, improve the resistance to deformation, and further increase the structural strength and stability of the pole plate. Attached Figure Description

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

[0010] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a battery according to the present invention is shown;

[0011] Figure 2 It shows Figure 1 A cross-sectional view of the battery;

[0012] Figure 3 It shows Figure 1 A top view of the battery;

[0013] Figure 4 A top view schematic diagram of an embodiment of the battery pack according to the present invention is shown;

[0014] Figure 5 It shows Figure 4 A partial exploded view of the battery pack;

[0015] Figure 6 It shows Figure 5 An enlarged view of point A on the battery pack;

[0016] Figure 7 It shows Figure 4 A cross-sectional view of the battery pack;

[0017] Figure 8 It shows Figure 7An enlarged view of point B on the battery pack.

[0018] The above figures include the following reference numerals:

[0019] 1. Battery pack;

[0020] 10. Battery; 11. First battery; 12. Second battery;

[0021] 20. Shell; 201. Flat plate segment; 202. First plate segment; 203. Second plate segment; 204. Third plate segment; 205. Notch; 21. Pole post plate; 211. Main body; 212. Protrusion; 213. Recess; 214. First side; 215. First side edge; 216. Second side; 217. Second side edge; 22. First side plate; 25. Second side plate; 26. Third side plate; 27. Fourth side plate;

[0022] 30. Pole post;

[0023] 40. Explosion-proof valve;

[0024] 50. Heat exchanger; 51. Vertical section; 52. Horizontal section;

[0025] 60. Box body;

[0026] 70. Thermal insulation components;

[0027] 81. First adhesive layer; 811. First extension; 82. Second adhesive layer; 821. Second extension. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] 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.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the 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 figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0031] According to one aspect of this application, a battery is provided, such as... Figures 1 to 3 As shown, an embodiment of the battery includes a housing 20 and terminals 30. The housing 20 includes a terminal plate 21, a first side plate 22, and a second side plate 25. The first side plate 22 and the second side plate 25 are connected to the two connected sides of the terminal plate 21. The outer surface area of ​​the first side plate 22 is larger than that of the second side plate 25, and the outer surface area of ​​the first side plate 22 is larger than that of the terminal plate 21. The terminal plate 21 includes a main body 211 and a protrusion 212 connected to the main body 211. The first side 214 of the protrusion 212 extends to the first side edge 215 of the terminal plate 21 and is abutted against the first side plate 22. The terminals 30 are disposed on the terminal plate 21. The ratio of the surface area of ​​the protrusion 212 to the outer surface area of ​​the main body 211 is greater than or equal to 0.2 and less than or equal to 0.45.

[0032] In the embodiment of the battery application, since the first side 214 of the protrusion 212 is connected to the first side plate 22, the structural stability of the protrusion 212 itself can be ensured. Simultaneously, the protrusion 212 can also change the cross-sectional shape of the electrode plate 21, increasing its moment of inertia and stably strengthening the structure of the electrode plate 21, reducing the problem of easy deformation of the electrode plate. Furthermore, the ratio of the surface area of ​​the protrusion 212 to the outer surface area of ​​the main body 211 is greater than or equal to 0.2 and less than or equal to 0.45. This range of ratios allows the protrusion 212 to effectively disperse stress, improve its resistance to deformation, and further increase the structural strength and stability of the electrode plate. The ratio of the surface area of ​​the protrusion 212 to the outer surface area of ​​the main body 211 is the surface area of ​​the protrusion 212 divided by the outer surface area of ​​the main body 211.

[0033] Specifically, the ratio of the surface area of ​​the protrusion 212 to the outer surface area of ​​the main body 211 is preferably 0.20, 0.22, 0.24, 0.26, 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, 0.42, 0.44 or 0.45.

[0034] It should be noted that the first side 214 of the protrusion 212 extends to the first side edge 215 of the pole plate 21 and is connected to the first side plate 22. This can be either that the first side 214 of the protrusion 212 is directly connected to the first side plate 22, or that the side of the protrusion 212 located at the first side edge 215 of the pole plate 21 is coplanar with the outer surface of the first side plate 22.

[0035] The surface area of ​​the protrusion 212 refers to the area of ​​all surfaces of the protrusion 212 on the side away from the housing 20; the main body 211 is provided with a through hole for the pole post 30 to pass through, and the outer surface area of ​​the main body 211 refers to the area of ​​the outer surface of the main body 211 excluding the position of the protrusion 212 and the through hole for the pole post to pass through.

[0036] Specifically, the main body 211 and the protrusion 212 are integrally formed, and the protrusion 212 is formed by stamping.

[0037] The aforementioned housing is a component used to provide a receiving space to house electrode assemblies and other parts and isolate them from the external environment. The housing generally includes a body with an opening at at least one end and a receiving cavity. The opening of the housing can be closed by a cover plate, sealing and isolating the internal environment of the battery cell from the external environment. The materials of the housing include, but are not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and aluminum-plastic film. The cover plate can be made of the same material as the housing.

[0038] like Figures 1 to 3 As shown, there are two terminals 30, and a protrusion 212 is disposed between the two terminals 30. In the direction from one terminal 30 to the other, the minimum distance between the edge of the protrusion 212 and either terminal 30 is greater than or equal to 10 mm and less than or equal to 35 mm. With this design, when the battery terminal plate 21 is subjected to impact or vibration, the protrusion 212 provides additional structural support around the terminals 30, thereby effectively dispersing stress, reducing the risk of deformation of the terminals 30, and improving the structural stability of the battery 10.

[0039] Specifically, the minimum distance between the edge of the protrusion 212 and any one of the pole posts 30 is preferably 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm or 35mm.

[0040] like Figures 1 to 3 As shown, the two terminals 30 are symmetrically arranged with respect to the first symmetry plane XZ. In the direction from one terminal 30 to the other, the protrusion 212 is symmetrically arranged with respect to the second symmetry plane. The second symmetry plane and the first symmetry plane XZ have a first distance, which is greater than or equal to 0 mm and less than or equal to 2 mm. This symmetrical arrangement ensures that the battery 10 experiences balanced forces in all directions, reducing deformation caused by uneven forces. The set range of the first distance optimizes the internal space distribution of the battery pack, ensuring the structural stability of the battery 10.

[0041] Specifically, the first distance is preferably 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0mm.

[0042] like Figures 1 to 3 As shown, the protrusion 212 also has a second side 216, which is disposed opposite to the first side 214 of the protrusion 212. The electrode plate 21 also has a second side edge 217, which is disposed opposite to the first side edge 215 of the electrode plate 21. There is a second distance between the second side 216 of the protrusion 212 and the second side edge 217 of the electrode plate 21, which is greater than or equal to 5 mm and less than or equal to 25 mm. By setting the range of the second distance, not only is the structural design of the battery 10 optimized, ensuring the structural strength at the edge of the battery and preventing deformation caused by stress concentration at the edge, but the packaging quality and overall structural stability of the battery are also further improved.

[0043] Specifically, the second distance is preferably 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm or 25mm.

[0044] like Figures 1 to 3As shown, in the Z-axis direction of the terminal post 30, the height of the protrusion 212 is less than the height of the terminal post 30. This height design ensures the accessibility of the top of the terminal post 30, facilitating subsequent welding of the busbar and preventing interference with the busbar. The height of the protrusion 212 is greater than or equal to 0.5 mm and less than or equal to 10 mm. This height range of the protrusion 212 improves the structural strength of the terminal post plate 21, effectively resists impact, optimizes the overall strength of the battery pack, and reduces the risk of deformation of the battery 10 during use.

[0045] Specifically, the height of the protrusion 212 is preferably 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm or 10.0mm.

[0046] like Figures 1 to 3 As shown, the inner surface of the protrusion 212 has a recess 213 disposed away from the interior of the housing 20. The recess 213 provides additional deformation space inside the battery, effectively absorbing stress when the battery 10 is subjected to changes in internal pressure, preventing the housing 20 from cracking, thereby enhancing the safety and reliability of the battery.

[0047] like Figures 1 to 3 As shown, the terminal plate 21 is located on the top or side of the housing 20. Placing the terminal plate 21 on the top or side optimizes the electrical connection of the battery 10, facilitates stacking and electrical wiring, and at the same time increases the heat dissipation area, improves the thermal management efficiency of the battery, and ensures the temperature stability of the battery 10 under high load operation.

[0048] like Figures 1 to 3 As shown, the protrusion 212 includes a flat plate segment 201 and a first plate segment 202, a second plate segment 203, and a third plate segment 204 sequentially connected to the edge of the flat plate segment 201. At the first side edge 215, the first plate segment 202, the flat plate segment 201, and the third plate segment 204 form a notch 205, and a portion of the first side plate 22 is sealed and connected to the notch 205. The specific structure of the protrusion 212 strengthens the strength of the electrode plate 21, and the sealing design of the notch 205 ensures the airtightness of the battery 10. At the same time, it increases the structural stability inside the battery, effectively resists impact, reduces the deformation risk of the electrode plate 21, and improves the structural strength of the battery 10.

[0049] like Figures 1 to 3As shown, the battery also includes an explosion-proof valve 40, which is disposed on the protrusion 212. The explosion-proof valve 40 provides a safe pressure relief channel for the battery 10. When the internal pressure of the battery rises abnormally, it can release the pressure in time, avoiding the risk of thermal runaway of the battery 10 and protecting the safety of the battery 10. The position of the protrusion 212 also ensures the structural stability of the explosion-proof valve 40. In the event of thermal runaway of the battery, the explosion-proof valve 40 can be directionally discharged, reducing the possibility of safety risks caused by undirectional discharge.

[0050] like Figures 1 to 3 As shown, the ratio of the area of ​​the explosion-proof valve 40 to the area of ​​the outer surface of the protrusion 212 is greater than or equal to 0.35 and less than or equal to 0.75. By setting the area ratio of the explosion-proof valve 40 to the protrusion 212, the structural strength around the explosion-proof valve 40 and the structural integrity of the battery 10 are ensured, preventing the area of ​​the explosion-proof valve 40 from becoming a weak point in the structure, and optimizing the safety performance and overall structural strength of the battery pack. The ratio of the area of ​​the explosion-proof valve 40 to the area of ​​the outer surface of the protrusion 212 is the area of ​​the explosion-proof valve 40 divided by the area of ​​the outer surface of the protrusion 212.

[0051] Specifically, the ratio of the area of ​​the explosion-proof valve 40 to the area of ​​the outer surface of the protrusion 212 is preferably 0.35, 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.60, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, 0.70, 0.71, 0.72, 0.73, 0.74, or 0.75.

[0052] It should be noted that the protrusion 212 is provided with a mounting hole for installing the explosion-proof valve 40, and the outer surface of the protrusion 212 refers to the outer surface of the protrusion 212 excluding the mounting hole.

[0053] The aforementioned explosion-proof valve refers to a component or part that can be actuated to release internal pressure or temperature when the internal pressure or temperature of a battery cell reaches a predetermined threshold. During battery use, the explosion-proof valve is mainly used to prevent excessive pressure buildup that could cause deformation or explosion in the event of thermal runaway or other situations. It allows gas to escape from the battery, thus reducing internal pressure. The material of the explosion-proof valve is not limited, including but not limited to aluminum, steel, and alloys. The shape of the explosion-proof valve is not limited, such as square, oblong, elliptical, racetrack-shaped, etc. The type of explosion-proof valve is not limited, such as a notched explosion-proof valve, which can be formed by stamping or laser etching.

[0054] The battery in this application is a single battery cell, also known as a secondary battery, or rechargeable battery or accumulator. It refers to a battery that can be recharged after discharge to reactivate its 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 charging and discharging, active ions (such as lithium ions) move back and forth between the positive and negative electrodes, inserting and extracting. The separator is positioned between the positive and negative electrodes, primarily to prevent short circuits and allow active ions to pass through. The electrolyte, located between the positive and negative electrodes, primarily serves to conduct active ions.

[0055] According to another aspect of this application, a battery pack is provided, such as Figures 1 to 8 As shown, an embodiment of the battery pack includes multiple batteries 10 and at least one heat exchanger 50. The batteries are the aforementioned type, and the multiple batteries include a first battery 11 and a second battery 12 arranged adjacent to each other along a first direction X. The first side plate 22 of the first battery 11 is arranged facing the first side plate 22 of the second battery 12 in the first direction X. In the first direction X, at least one heat exchanger 50 is disposed on at least one side of the first battery 11 and the second battery 12 that are opposite to each other. In the second direction Y, which intersects the first direction, multiple first batteries 11 and second batteries 12 are disposed. The first direction X and the second direction Y intersect on a horizontal plane. Since the aforementioned battery can solve the problem of easy deformation of the electrode plate, the battery pack including this battery can solve the same technical problem. Furthermore, the arrangement of the heat exchanger 50 optimizes the thermal management of the battery pack 1, improves the heat dissipation efficiency of the battery pack, ensures the temperature stability of the battery pack 1 under high load operation, and extends the service life of the battery pack. At the same time, the heat exchanger 50 also provides additional structural support for the battery pack 1, improving the overall structural strength and impact resistance.

[0056] like Figures 1 to 8 As shown, there are two heat exchangers 50. Each first battery 11 includes a third side plate 26 disposed opposite to the first side plate 22, and each second battery 12 includes a fourth side plate 27 disposed opposite to the first side plate 22. In the second direction Y, all first batteries 11 are bonded to one heat exchanger 50, and all second batteries 12 are bonded to the other heat exchanger 50. The design of the two heat exchangers 50 ensures uniform heat exchange and structural stability of the battery pack 1 in the X and Y directions, avoids structural distortion caused by unilateral stress, improves the overall strength and thermal management efficiency of the battery pack 1, facilitates increased battery pack density, and meets structural strength requirements.

[0057] like Figures 1 to 8As shown, each heat exchanger 50 includes a vertical section 51 and a horizontal section 52 connected to the vertical section 51. In the second direction Y, the third side plates 26 of all first batteries 11 are bonded to the vertical section 51 of one heat exchanger 50, the fourth side plates 27 of all second batteries 12 are bonded to the vertical section 51 of another heat exchanger 50, the terminal plates 21 of all first batteries 11 are bonded to the horizontal section 52 of one heat exchanger 50, and the terminal plates 21 of all second batteries 12 are bonded to the horizontal section 52 of another heat exchanger 50. The specific structure of the heat exchanger 50 provides a multi-dimensional heat exchange path for the battery pack 1, enhancing the thermal stability of the battery pack. At the same time, the bonding method between the vertical section 51 and the horizontal section 52 and all first batteries 11 and all second batteries 12 improves the overall structural strength of the battery pack 1, reduces battery damage under vibration and impact conditions, and is beneficial to the long-term stable operation of the battery pack 1.

[0058] The heat exchanger 50 is preferably a heat exchange plate, which can be used as a component to regulate the battery temperature. The heat exchange plate is made of the following material / composed: It has internal heat exchange channels, specifically in both horizontal and vertical sections. These channels facilitate the flow of the heat exchange medium, which can be gas (air), liquid (such as water, alcohol, refrigerant, oil, etc.), or solid (such as thermally conductive adhesive, thermally conductive solder paste, etc.). Each heat exchange channel has an inlet and an outlet. The heat exchange medium enters the channel through the inlet, exchanges heat with the battery cells, and then exits through the outlet, thus achieving heat exchange between the battery cells.

[0059] like Figures 1 to 8 As shown, the upper surface of the horizontal segment 52 is flush with or lower than the upper surface of the protrusion 212 of each first battery 11; the upper surface of the horizontal segment 52 is flush with or lower than the upper surface of the protrusion 212 of each second battery 12. This design ensures the flatness of the upper surface of the battery pack, avoiding unstable stacking or assembly difficulties of the battery pack 1 due to the height difference of the protrusions 212. At the same time, the flush or lower setting also reduces the direct pressure of the upper structure on the battery, preventing the battery 10 from being deformed or damaged by external direct pressure, and improving the assembly efficiency and overall structural strength of the battery pack.

[0060] According to another aspect of this application, a battery pack is provided, such as Figures 1 to 8As shown, an embodiment of the battery pack includes a housing 60 and a battery pack 1 disposed within the housing 60. The battery pack is the aforementioned battery pack. The battery pack 1 also includes a heat insulation component 70 disposed between the first battery 11 and the second battery 12. The bottom of the battery pack 1 and the bottom of the housing 60 are bonded together by a first adhesive layer 81, and a second adhesive layer 82 is disposed on the top of the battery pack 1. Since the aforementioned battery pack can solve the problem of easy deformation of the terminal plates, the battery pack including this battery pack can solve the same technical problem. Furthermore, the combination of the housing 60 and the heat insulation component 70 provides protection for the battery pack 1. In particular, the heat insulation component 70 can effectively absorb and disperse the impact force generated by the deformation of the battery pack 1, protecting the adjacent first battery 11 and second battery 12 from direct impact, reducing structural damage to the battery 10 caused by impact, and improving the overall safety and durability of the battery pack.

[0061] The aforementioned heat insulation component 70 has the function of buffering and absorbing battery deformation. It is placed between adjacent first batteries 11 and second batteries 12 to prevent heat conduction between them, thus preventing thermal runaway from the first battery 11 or second battery 12 from being transferred to adjacent batteries and suppressing heat propagation within the battery pack. The heat insulation layer of the component is made of modified epoxy resin, polyacrylate, polyethylene terephthalate (PET), polyimide coating, or an insulating coating formed from polymers such as polyimide (PI) and epoxy resin, or styrene-butadiene rubber latex.

[0062] like Figures 4 to 8 As shown, the first adhesive layer 81 has a first extension 811 extending upward between the first battery 11 and the second battery 12. The first extension 811 has a dimension in the vertical direction that is greater than or equal to 0.5 mm and less than or equal to 5 mm. The first extension 811 of the first adhesive layer 81 provides a strong bond between the housing 60 and the battery pack 1 structure, enhancing the structural stability of the battery pack 1. At the same time, the first adhesive layer 81 also helps to disperse and absorb impact forces, protecting the battery 10 from vibration and impact damage, and improving the durability of the battery pack.

[0063] Specifically, the first extension 811 has dimensions of 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, or 5.0mm in the vertical direction.

[0064] like Figures 4 to 8As shown, the second adhesive layer 82 has a second extension 821 extending downward between the protrusion 212 of the first battery 11 and the protrusion 212 of the second battery 12. The second extension 821 has a dimension in the vertical direction greater than or equal to 1 mm and less than or equal to 9 mm. The covering of the second adhesive layer 82 and the second extension 821 are designed to further enhance the structural strength of the battery pack 1. At the same time, the insulating and shock-absorbing properties of the adhesive layer protect the battery 10 from electrical short circuits and damage, thereby improving the electrical safety and reliability of the battery pack.

[0065] The first adhesive layer 81 and the second adhesive layer 82 mentioned above are preferably structural adhesives used to bond and fix structural components within the battery pack. Structural adhesives possess characteristics such as high strength, ability to withstand large loads, aging resistance, fatigue resistance, corrosion resistance, and stable performance throughout their expected lifespan, thereby improving the connection strength between the battery and the casing. The structural adhesive can use insulating materials as the base material, such as epoxy resin, silicone rubber, polyurethane, etc.

[0066] Specifically, the dimensions of the second extension 821 in the vertical direction are preferably 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, or 9mm.

[0067] like Figures 4 to 8 As shown, the second adhesive layer 82 covers the upper surface of each battery 10. This full coverage provides additional protection and electrical isolation, absorbing and dispersing impact forces when the battery pack is subjected to impact or environmental changes. Simultaneously, it facilitates the connection of each battery and the housing into a single unit, improving overall structural strength. This eliminates the need for crossbeams or longitudinal beams within the housing, increasing battery pack density while still meeting overall structural strength requirements.

[0068] like Figures 4 to 8 As shown, there are multiple battery packs 1, and a second adhesive layer 82 covers the upper surface of each battery pack 1. The combination of multiple battery packs 1 and the coverage of the second adhesive layer 82 enhances the connection strength between the battery packs 1, making it easier to connect each battery pack 1 and the housing into a whole, improving the overall structural strength. This eliminates the need for crossbeams or longitudinal beams inside the housing, not only improving the space utilization of the battery pack but also meeting the overall structural strength requirements.

[0069] In this application, the enclosure refers to a closed or semi-closed structure made of materials such as metal and plastic. It serves as the physical carrier of the battery pack, and 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 a reasonable structural design, fixes these components within the enclosure, 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 enclosure can be cast from materials such as steel plates or aluminum alloys, or it can be made from lightweight materials, such as glass fiber reinforced composite materials or carbon fiber reinforced composite materials. The shape of the enclosure can be cylindrical, cuboid, cube, etc.

[0070] The aforementioned battery pack includes a battery pack composed of multiple individual 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 housed within a casing 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 casing housing the cell modules and the BMS control module. The battery pack includes a casing and multiple individual battery cells housed within it. The casing is divided into upper and lower parts, which are sealed together. The battery pack includes at least two cell units, BMS control components, and a casing. A battery pack generally includes a battery box and battery modules; the battery box includes a lower casing and an upper cover. A battery pack typically includes a housing, individual battery cells, and a separator. Both the individual battery cells and the separator are located inside the housing. The separator is located on the side of the individual battery cell away from the bottom wall of the housing, separating the individual battery cell from other components located above it, thus providing isolation.

[0071] According to another aspect of this application, an electrical device is provided, an embodiment of which includes a battery pack, the battery pack being the aforementioned battery pack. The battery pack is capable of supplying power to the electrical device. Since the aforementioned battery pack can solve the problem of easy deformation of the terminal plates, the electrical device including the battery pack can solve the same technical problem. The electrical device disclosed in this application can be, but is not limited to, vehicles, mobile phones, tablets, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be fuel 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.

[0072] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention 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 invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0073] 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.

[0074] 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 should not be construed as limiting the scope of protection of this invention.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery, characterized in that, include: The housing (20) includes an electrode plate (21), a first side plate (22) and a second side plate (25). The first side plate (22) and the second side plate (25) are connected to the two connected sides of the electrode plate (21). The outer surface area of ​​the first side plate (22) is larger than the outer surface area of ​​the second side plate (25). The outer surface area of ​​the first side plate (22) is larger than the outer surface area of ​​the electrode plate (21). The electrode plate (21) includes a main body (211) and a protrusion (212) connected to the main body (211). The first side (214) of the protrusion (212) extends to the first side edge (215) of the electrode plate (21) and is connected to the first side plate (22). A pole post (30) is disposed on the pole post plate (21); The ratio of the surface area of ​​the protrusion (212) to the outer surface area of ​​the main body (211) is greater than or equal to 0.2 and less than or equal to 0.

45.

2. The battery according to claim 1, characterized in that, There are two pole posts (30), and the protrusion (212) is disposed between the two pole posts (30). In the direction from one pole post (30) to the other pole post (30), the minimum distance between the edge of the protrusion (212) and any pole post (30) is greater than or equal to 10 mm and less than or equal to 35 mm.

3. The battery according to claim 1, characterized in that, The two pole posts (30) are symmetrically arranged with respect to the first symmetry plane (XZ). In the direction from one pole post (30) to the other pole post (30), the protrusion (212) is symmetrically arranged with respect to the second symmetry plane. The second symmetry plane and the first symmetry plane (XZ) have a first distance between them, which is greater than or equal to 0 mm and less than or equal to 2 mm.

4. The battery according to claim 1, characterized in that, The protrusion (212) also has a second side (216), the second side (216) of the protrusion (212) is disposed opposite to the first side (214) of the protrusion (212), the pole plate (21) also has a second side edge (217), the second side edge (217) of the pole plate (21) is disposed opposite to the first side edge (215) of the pole plate (21), and there is a second distance between the second side (216) of the protrusion (212) and the second side edge (217) of the pole plate (21), the second distance being greater than or equal to 5 mm and less than or equal to 25 mm.

5. The battery according to claim 1, characterized in that, In the axial direction (Z) of the pole post (30), the height of the protrusion (212) is less than the height of the pole post (30); and / or, the height of the protrusion (212) is greater than or equal to 0.5 mm and less than or equal to 10 mm.

6. The battery according to claim 1, characterized in that, The inner surface of the protrusion (212) has a recess (213) disposed away from the interior of the housing (20).

7. The battery according to claim 1, characterized in that, The pole plate (21) is located on the top or side of the housing (20).

8. The battery according to claim 1, characterized in that, The protrusion (212) includes a flat plate segment (201) and a first plate segment (202), a second plate segment (203) and a third plate segment (204) connected sequentially to the edge of the flat plate segment (201). At the first side edge (215), the first plate segment (202), the flat plate segment (201) and the third plate segment (204) form a notch (205), and a part of the first side plate (22) blocks and connects to the notch (205).

9. The battery according to claim 1, characterized in that, The battery also includes an explosion-proof valve (40), which is disposed on the protrusion (212).

10. The battery according to claim 9, characterized in that, The ratio of the area of ​​the explosion-proof valve (40) to the area of ​​the outer surface of the protrusion (212) is greater than or equal to 0.35 and less than or equal to 0.

75.

11. A battery pack comprising a plurality of batteries (10) and at least one heat exchanger (50), characterized in that, The battery is the battery according to any one of claims 1 to 10. The plurality of batteries (10) includes a first battery (11) and a second battery (12) arranged adjacent to each other along a first direction (X). The first side plate (22) of the first battery (11) is arranged facing the first side plate (22) of the second battery (12) in the first direction (X). In the first direction (X), at least one heat exchanger (50) is arranged on at least one side of the first battery (11) and the second battery (12) facing away from each other. In the second direction (Y) intersecting the first direction (X), there are a plurality of first batteries (11) and second batteries (12). The first direction (X) and the second direction (Y) intersect on a horizontal plane.

12. The battery pack according to claim 11, characterized in that, There are two heat exchangers (50). Each first battery (11) includes a third side plate (26) disposed opposite to the first side plate (22), and each second battery (12) includes a fourth side plate (27) disposed opposite to the first side plate (22). In the second direction (Y), all first batteries (11) are bonded to one heat exchanger (50), and all second batteries (12) are bonded to the other heat exchanger (50).

13. The battery pack according to claim 12, characterized in that, Each of the heat exchangers (50) includes a vertical section (51) and a horizontal section (52) connected to the vertical section (51). In the second direction (Y), the third side plates (26) of all the first batteries (11) are bonded to the vertical section (51) of one heat exchanger (50), the fourth side plates (27) of all the second batteries (12) are bonded to the vertical section (51) of another heat exchanger (50), the electrode plates (21) of all the first batteries (11) are bonded to the horizontal section (52) of one heat exchanger (50), and the electrode plates (21) of all the second batteries (12) are bonded to the horizontal section (52) of another heat exchanger (50).

14. The battery pack according to claim 13, characterized in that, The upper surface of the horizontal segment (52) is flush with or lower than the upper surface of the protrusion (212) of each of the first batteries (11); and / or, the upper surface of the horizontal segment (52) is flush with or lower than the upper surface of the protrusion (212) of each of the second batteries (12).

15. A battery pack, comprising a housing (60) and a battery pack (1) disposed within the housing (60), characterized in that, The battery pack is the battery pack according to any one of claims 11 to 13. The battery pack (1) further includes a heat insulation member (70) disposed between the first battery (11) and the second battery (12). The bottom of the battery pack (1) and the bottom of the housing (60) are bonded together by a first adhesive layer (81). A second adhesive layer (82) is disposed on the top of the battery pack (1).

16. The battery pack according to claim 15, characterized in that, The first adhesive layer (81) has a first extension (811) extending upward between the first battery (11) and the second battery (12), and the first extension (811) has a dimension in the vertical direction greater than or equal to 0.5 mm and less than or equal to 5 mm.

17. The battery pack according to claim 15, characterized in that, The second adhesive layer (82) has a second extension (821) extending downward between the protrusion (212) of the first battery (11) and the protrusion (212) of the second battery (12), the second extension (821) having a dimension in the vertical direction greater than or equal to 1 mm and less than or equal to 9 mm.

18. The battery pack according to claim 15, characterized in that, The second adhesive layer (82) covers the upper surface of each of the batteries (10).

19. The battery pack according to claim 15, characterized in that, There are multiple battery packs (1), and the second adhesive layer (82) covers the upper surface of each battery pack (1).

20. An electrical device comprising a battery pack, characterized in that, The battery pack is the battery pack according to any one of claims 15 to 19.

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