Battery and electric apparatus

Abstract

A battery (1000) and an electric apparatus, which solve the problem of reduced insulation capability between a charged structure and an uncharged conductive structure in a battery. The battery (1000) comprises a battery case (2), an insulating adsorption member (11) and a battery module (1), wherein both the battery module (1) and the insulating adsorption member (11) are mounted in the battery case (2); the insulating adsorption member (11) is located on one side of a battery assembly (12) of the battery module (1); the battery assembly (12) comprises a plurality of battery cells (121); the insulating adsorption member (11) is configured to adsorb electrolyte and a thermal runaway product that are released by at least one battery cell (121) of the battery assembly (12); and the insulating adsorption member (11) is in the shape of a plate, a sheet or a block.

Description

Battery and power consuming device

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 2024213859243, filed on June 18, 2024, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery, in particular to a battery and a power consuming device. BACKGROUND

[0004] The battery can include battery monomers and a battery box body, and the battery monomers are installed in the battery box body. The insulation capability between the charged structure (for example, the tab) and the uncharged conductive structure (for example, the end plate) in the battery is reduced, which can cause dangerous accidents such as explosion of the battery.

[0005] SUMMARY

[0006] The present application mainly solves the technical problem of providing a battery and a power consuming device to solve the problem of reduced insulation capability between the charged structure and the uncharged conductive structure in the battery.

[0007] To solve the above technical problem, the first technical solution adopted by the present application is to provide a battery. The battery includes a battery box body, an insulating suction accessory, and a battery module, and the battery module and the insulating suction accessory are both installed in the battery box body; the insulating suction accessory is located on one side of a battery assembly of the battery module; the battery assembly includes a plurality of battery monomers; and the insulating suction accessory is configured to adsorb electrolyte and thermal runaway products released by at least one battery monomer of the battery assembly. The shape of the insulating suction accessory is a plate, a sheet, or a block.

[0008] In this embodiment, when the battery monomers of the battery module undergo thermal runaway, the insulating suction accessory is used to adsorb the electrolyte and thermal runaway products released by the battery monomers, thereby reducing the amount of electrolyte and thermal runaway products released by the battery monomers flowing into the battery module, so that the creepage distance between the charged structure (for example, the tab) and the uncharged conductive structure remains unchanged or slightly decreases. Thus, the problem of reduced insulation performance between the charged structure (for example, the tab) and the uncharged conductive structure (for example, the end plate) in the battery due to the electrolyte and thermal runaway products released by the battery monomers being located between the charged structure (for example, the tab) and the uncharged conductive structure (for example, the end plate) in the battery is solved.

[0009] In some embodiments, the first direction intersects the end plate of the battery module. Along the first direction, there is a first gap between the insulating suction accessory and the end plate of the battery module. This can prevent the insulating suction accessory from contacting the end plate and reduce the risk of short circuiting between the electrolyte and thermal runaway products adsorbed by the insulating suction accessory and the end plate.

[0010] In some embodiments, the first gap is greater than or equal to 5 mm. The creepage distance between the insulating suction member and the end plate of the battery module is large, and the insulation capacity between the insulating suction member and the end plate of the battery module is strong.

[0011] In some embodiments, the insulating suction member is located on only one side of the first surface of the battery assembly; the first surface extends along a first direction and intersects the first side surface of the battery assembly; the first direction intersects the end plate of the battery module. Wherein, along the first direction, the insulating suction member protrudes beyond the first side surface of the battery assembly, or the insulating suction member is flush with the first side surface of the battery assembly.

[0012] In the present embodiment, the insulating suction member protrudes beyond the first side surface of the battery assembly, or the insulating suction member is flush with the first side surface of the battery assembly; so that the insulating suction member can cover more battery cells, so that the insulating suction member can adsorb more electrolyte and thermal runaway products released by the battery cells, and reduce the amount of electrolyte and thermal runaway products in the battery module.

[0013] In some embodiments, the insulating suction member is located between the first top surface of the battery assembly and the battery box; along the height direction of the battery module, there is a second gap between the insulating suction member and the top conductive structure on the first top surface of the battery assembly.

[0014] In the present embodiment, the insulating suction member is located between the first top surface of the battery assembly and the battery box, so that the insulating suction member can quickly adsorb the electrolyte and thermal runaway products released by the safety valve of the battery cell, and reduce the amount of electrolyte and thermal runaway products flowing into the battery module. The second gap between the insulating suction member and the top conductive structure on the first top surface of the battery assembly can prevent the insulating suction member from contacting the top conductive structure on the first top surface of the battery assembly, reducing the risk of short circuit between the electrolyte and thermal runaway products adsorbed by the insulating suction member and the top conductive structure on the first top surface of the battery assembly.

[0015] In some embodiments, the second gap is greater than or equal to 1 mm. The creepage distance between the insulating suction member and the top conductive structure on the first top surface of the battery assembly is large, and the insulation capacity between the insulating suction member and the top conductive structure on the first top surface of the battery assembly is strong.

[0016] In some embodiments, the plurality of battery cells of the battery assembly is divided into M battery cell assemblies; the M battery cell assemblies are arranged along a length direction of the battery cell; the battery cell assembly includes N battery cells arranged along a width direction of the battery cell. The insulating adsorption member includes M first adsorption portions; the M first adsorption portions are arranged along the length direction of the battery cell; the M first adsorption portions are arranged corresponding to the M battery cell assemblies, and the first adsorption portion covers the safety valve of the N battery cells of the battery cell assembly.

[0017] In the present embodiment, the M first adsorption portions are arranged along the length direction of the battery cell, so that the total area of the insulating adsorption member formed by the M first adsorption portions is small, thereby saving the material of the insulating adsorption member and reducing the cost of the insulating adsorption member. The M first adsorption portions can adsorb the electrolyte and thermal runaway products released from the safety valve of all battery cells.

[0018] In some embodiments, the insulating adsorption member can withstand a temperature above 300 DEG C. After the battery cell is in thermal runaway, the temperature of the electrolyte and thermal runaway products released from the safety valve is high, and the high-temperature-resistant insulating adsorption member can adsorb the electrolyte and thermal runaway products at high temperature.

[0019] In some embodiments, the insulating adsorption member is arranged on the second side of the battery assembly; the second side of the battery assembly intersects with the end plate of the battery module. It is beneficial for the insulating adsorption member to adsorb more electrolyte and thermal runaway products. There is no conductive structure on the second side of the battery assembly, thereby reducing the installation difficulty of the insulating adsorption member.

[0020] In some embodiments, the insulating adsorption member covers the entire second side of the battery assembly. The volume of the insulating adsorption member is large, and the adsorption capacity of the insulating adsorption member is strong, which is beneficial to absorb more electrolyte and thermal runaway products of the battery cell.

[0021] In some embodiments, an explosion-proof valve is arranged on one side of the first side of the battery assembly; along the first direction and away from the explosion-proof valve, the adsorption performance of the insulating adsorption member decreases; the first direction intersects with the end plate of the battery module.

[0022] In the present embodiment, the adsorption capacity of the side of the insulating adsorption member close to the explosion-proof valve is greater than the adsorption capacity of the side of the insulating adsorption member away from the explosion-proof valve, so that the side of the insulating adsorption member close to the explosion-proof valve can adsorb more electrolyte and thermal runaway products released from the safety valve of the battery cell.

[0023] In some embodiments, along the first direction and away from the explosion-proof valve, the height of the insulating adsorption member gradually decreases; the minimum height of the insulating adsorption member is greater than the height of the shell insulating film of the battery cell.

[0024] In the embodiment, the height of the insulation adsorption accessory gradually decreases in the first direction and away from the explosion-proof valve, so that the adsorption performance of the insulation adsorption accessory gradually decreases. The minimum height of the insulation adsorption accessory is greater than the height of the shell insulation film of the battery monomer, which can reduce the risk of direct contact of the electrolyte and the thermal runaway product with the shell insulation film.

[0025] In some embodiments, the second top surface of the insulation adsorption accessory is a slope or a stepped surface with gradually decreasing height in the first direction and away from the explosion-proof valve. The height of the insulation adsorption accessory can gradually decrease.

[0026] In some embodiments, the insulation adsorption accessory includes N second adsorption parts arranged along the first direction. The height of the N second adsorption parts gradually decreases in the first direction and away from the explosion-proof valve.

[0027] In the embodiment, the N second adsorption parts can be combined to form an insulation adsorption accessory arranged on the second side. When any second adsorption part is damaged, the damaged second adsorption part can be replaced, thereby saving costs.

[0028] In some embodiments, the plurality of battery monomers of the battery assembly are divided into M battery monomer assemblies; the M battery monomer assemblies are arranged along the length direction of the battery monomer; the battery monomer assembly includes N battery monomers arranged along the width direction of the battery monomer; and the width direction of the battery monomer is the first direction. The size of the second adsorption part is equal to the size of the battery monomer along the width direction of the battery monomer; and the N second adsorption parts are arranged one-to-one corresponding to the N battery monomers of the most edge battery monomer assembly of the M battery monomer assemblies.

[0029] In the embodiment, the N second adsorption parts are arranged one-to-one corresponding to the N battery monomers of the most edge battery monomer assembly of the M battery monomer assemblies, so that the volume of the second adsorption part is small; when the damaged second adsorption part needs to be replaced, more costs can be saved.

[0030] In some embodiments, the battery module further includes a binding belt for binding the insulation adsorption accessory on the second side of the battery assembly. The binding belt can quickly fix the insulation adsorption accessory on the second side of the battery assembly, so that the insulation adsorption accessory and the battery assembly form an integral whole.

[0031] In some embodiments, the number of battery modules is multiple, and an insulation adsorption accessory is arranged between the second sides of the battery assemblies of two adjacent battery modules and in contact with the second sides. The second side of the battery assembly intersects with the end plate of the battery module.

[0032] In the embodiment, the insulating suction accessory can adsorb the electrolyte and thermal runaway products released by the battery monomer of the battery assembly of the two adjacent battery modules, and protect the second side of the battery assembly. Therefore, the side plate of the battery module can be removed to reduce the weight of the battery.

[0033] To solve the above technical problems, the second technical solution provided by the application is to provide a power utilization equipment. The power utilization equipment comprises a power utilization device and the battery described above, and the battery is electrically connected with the power utilization device. Since the power utilization equipment comprises the battery described above, the power utilization equipment has the same effect as the battery. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Fig. 1 is a structural schematic diagram of a power utilization equipment provided by the present application;

[0036] Fig. 2 is a structural schematic diagram of a battery provided by the present application;

[0037] Fig. 3 is a structural schematic diagram of a battery monomer provided by the present application;

[0038] Fig. 4 is a top view of a battery assembly provided by the present application;

[0039] Fig. 5 is a top view of a battery module in Fig. 2;

[0040] Fig. 6 is a front view of the battery module in Fig. 2;

[0041] Fig. 7 is a structural schematic diagram of another battery provided by the present application;

[0042] Fig. 8 is a structural schematic diagram of another battery provided by the present application;

[0043] Fig. 9 is a front view of a battery module in Fig. 8;

[0044] Fig. 10 is a structural schematic diagram of a replacement of the insulating suction accessory in Fig. 9;

[0045] Fig. 11 is a front view of another battery module in Fig. 8;

[0046] Fig. 12 is a front view of another battery module in Fig. 10.

[0047] In the figure: 1, battery module; 11, insulating suction accessory; 111, first suction part; 112, second suction part; 12, battery assembly; 121, battery monomer; 1211, connecting member; 1212, cover plate; 1213, pole column; 1214, safety valve; 1215, electrode assembly; 1236, shell; 1237, shell insulation film; 122, first side surface; 123, first bottom surface; 124, second side surface; 125, first top surface; 126, first surface; 127, battery monomer assembly; 13, end plate; 15, explosion-proof valve; 2, battery box; 21, second box; 22, first box; 1000, battery; 2000, electric device. DETAILED DESCRIPTION

[0048] The scheme of the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the specification.

[0049] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. However, persons having ordinary skill in the art will appreciate that the present application can be practiced without incorporating these specific details, and that fly does not limit the scope or functionality of the present application.

[0050] The technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons having ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0051] The terms "first", "second", "third" in the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0052] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. One of ordinary skill in the art will readily recognize from the disclosure herein a wide number of variations, alternatives, and equivalents in the devices and methods that fall within the scope of the application. Those skilled in the art will further appreciate that the methods and compositions described herein can be adapted for use with a variety of other chemical, biological, and / or medical treatments.

[0053] At present, from the development of market situation, the application of energy storage and power battery is more and more widely. Energy storage and power battery is not only applied to energy storage power supply system such as water power, fire power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, aerospace and other fields. With the continuous expansion of the application field of energy storage and power battery, the market demand is also increasing.

[0054] The present inventors have noticed that as the use time of energy storage and power battery becomes longer, the battery may have a dangerous accident such as explosion.

[0055] In order to reduce the possibility of explosion of the battery, the applicant found that an insulating suction member can be arranged outside the battery monomer. This is because the battery usually includes a battery monomer and a battery box body, and the battery monomer is installed in the battery box body. After the battery monomer has thermal runaway, the safety valve of the battery monomer releases electrolyte and thermal runaway products, which are products after the electrolyte has thermal reaction. The released electrolyte and thermal runaway products flow into the battery box body, so that the creepage distance between the charged structure (such as a battery plate, a circuit board, etc.) and the uncharged conductive structure (such as an end plate, a battery box body) in the battery is shortened, thereby reducing the insulation ability between the charged structure and the uncharged conductive structure, so that the battery has a dangerous accident such as explosion. The charged structure can be understood as a charged conductive structure.

[0056] In order to solve the problem of reduced insulation capability between the charged structure (for example, the tab) and the uncharged conductive structure (for example, the end plate) in the battery, the embodiments of the present application provide a battery, which comprises a battery box and a battery module installed in the battery box; the battery module comprises a battery assembly, an insulating suction member, and the insulating suction member is located on one side of the battery assembly of the battery module. The shape of the insulating suction member is a plate, a sheet or a block. After the battery cell occurs thermal runaway, the insulating suction member is used to adsorb the electrolyte and thermal runaway products released by the battery cell, thereby reducing the amount of electrolyte and thermal runaway products released by the battery cell flowing into the battery module, so that the creepage distance between the charged structure (for example, the tab) and the uncharged conductive structure (for example, the end plate) in the battery remains unchanged or slightly decreases. Thus, the problem of reduced insulation performance between the charged structure (for example, the tab) and the uncharged conductive structure (for example, the end plate) in the battery due to the electrolyte and thermal runaway products released by the battery cell located between the charged structure (for example, the tab) and the uncharged conductive structure (for example, the end plate) in the battery is solved.

[0057] The embodiments of the present application provide a power utilization device. Referring to FIG. 1, the power utilization device comprises a power utilization apparatus 2000 and a battery 1000, and the battery 1000 is electrically connected with the power utilization apparatus 2000. The battery 1000 can supply power to the power utilization apparatus 2000, so that the power utilization apparatus 2000 can work.

[0058] The power utilization device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The following embodiments take the power utilization device as a vehicle for example for convenient description. The power utilization device can also be a matching energy storage device of a solar power station and a wind power station, a household energy storage system and a communication base station, etc.

[0059] The electric device 2000 can be an element or a device that can be powered. The electric device 2000 can be a controller and an electronic element, etc. The controller can be a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc.

[0060] In the case where the electric device is a vehicle as shown in FIG. 1, the electric device 2000 can be a lamp (e.g., a headlamp, a rear lamp, etc.), a display screen, an instrument panel, a control system (e.g., a controller), etc. in the vehicle. In the case where the electric device is a vehicle, the electric device can further include other parts, for example, the other parts can be a vehicle frame, and the battery 1000 and the electric device 2000 are both mounted on the vehicle body.

[0061] Embodiments of the present application also provide a battery. Referring to FIG. 2, the battery 1000 can include a battery box 2, an insulating suction member 11, and a battery module 1, the battery module 1 and the insulating suction member 11 are both mounted in the battery box 2; the insulating suction member 11 is located on one side of a battery assembly 12 of the battery module 1; the battery assembly 12 includes a plurality of battery monomers 121; the insulating suction member 11 is configured to adsorb electrolyte and thermal runaway products released by at least one battery monomer 121 of the battery assembly 12. The shape of the insulating suction member 11 is a plate, a sheet or a block.

[0062] The battery box 2 has a containing space. At least one battery module 1 is installed in the containing space of the battery box 2, so that the battery box 2 can play a role of protecting the battery module 1. For example, one battery module 1 is installed in the containing space of the battery box 2. For another example, a plurality of (i.e., two or more) battery modules 1 are installed in the containing space of the battery box 2, and the plurality of battery modules 1 can be in series, parallel or mixed connection. The battery box 2 can include a first box 22 and a second box 21, and the second box 21 is buckled on the first box 22 to form the containing space. The shape of the battery box 2 can be specifically set as needed. For example, the shape of the battery box 2 can be cylindrical, and the corresponding battery 1000 can be referred to as a circular battery 1000; for another example, the shape of the battery box 2 can be rectangular, and the corresponding battery 1000 can be referred to as a rectangular battery 1000.

[0063] The battery module 1 can include two types of plates; the first type of plate does not contain a conductive structure and can be removed from the battery module 1 to achieve the purpose of simplifying the structure; of course, the first type of plate can also not be removed. The second type of plate contains a conductive structure and cannot be removed from the battery module 1.

[0064] The battery module 1 can further include end plates 13 disposed on the first side 122 of the battery assembly 12 to protect the first side 122 of the battery assembly 12. The two end plates 13 are oppositely disposed. The end plates 13 are plates containing electrically conductive structures, and thus the end plates 13 are the second type of plates; for example, the end plates 13 are provided with output pole bases by which the battery assembly 12 can output electric energy. The plate bodies of the end plates 13 can be insulating materials, for example, plastics or the like.

[0065] The battery module 1 can further include at least one of a top plate, a bottom plate, and two side plates. For example, the battery module 1 can further include a top plate. For another example, the battery module 1 can further include a bottom plate. For another example, the battery module 1 can further include two side plates. For another example, the battery module 1 can further include a top plate and a bottom plate. For another example, the battery module 1 can further include a top plate, a bottom plate, and two side plates. The side plates, the bottom plate, and the top plate can all be the first type of plates containing no electrically conductive structures, and thus the side plates, the bottom plate, and the top plate can be the first type of plates. The materials of the side plates, the bottom plate, and the top plate can be insulating materials, for example, plastics or the like. Of course, the side plates and the bottom plate can contain electrically conductive structures, and thus the side plates and the bottom plate are the second type of plates.

[0066] In some examples, the battery module 1 can include two end plates 13, a top plate, a bottom plate, and two side plates. The two end plates 13, the top plate, the bottom plate, and the two side plates can enclose a module box. The module box has a receiving cavity. The battery assembly 12 is installed in the receiving cavity of the module box, so that the module box protects the battery assembly 12. Specifically, the top plate and the bottom plate are disposed on the top and the bottom of the battery assembly 12, respectively; the two end plates 13 are disposed on the opposite ends of the battery assembly 12 along a first direction, and the two side plates are disposed on the opposite ends of the battery assembly 12 along a second direction perpendicular to the first direction.

[0067] The battery assembly 12 can include two first sides 122, two second sides 124, a first top side 125, and a first bottom side 123. The battery module 1 can include two end plates 13, and the first side 122 of the battery assembly 12 is opposite to the end plate 13. In some examples, the first top side 125 of the battery assembly 12 is opposite to the top plate, the first bottom side 123 is opposite to the bottom plate, the second side 124 is opposite to the side plate, and the first side 122 is opposite to the end plate 13.

[0068] In this paper, the first bottom surface 123 and the first top surface 125 of the battery assembly 12 are described as the upper surface and the lower surface of the battery assembly 12 when the battery 1000 is placed in the state shown in FIG. 2; of course, the first bottom surface 123 and the first top surface 125 of the battery assembly 12 are the left side and the right side of the battery assembly 12, and can be determined according to the actual situation, and the embodiments of the present specification do not limit this. Among them, the height, length and width of the battery monomer 121, the first side 122 and the second side 124 of the battery assembly 12, the top plate, the bottom plate, the side plate and the end plate 13 of the battery module 1 can be understood with reference to the above description of the first bottom surface 123 and the first top surface 125 of the battery assembly 12 as the upper surface and the lower surface.

[0069] The battery assembly 12 can include a plurality of battery monomers 121, and the plurality of battery monomers 121 can be connected in series or parallel or mixed. The plurality of battery monomers 121 in the battery 1000 module can be electrically connected through a busbar component to realize, for example, parallel or series or mixed connection of the plurality of battery monomers 121 in the battery 1000 module.

[0070] The battery monomer 121 can be a secondary battery 1000, which refers to a battery monomer 121 that can be activated by charging after discharging. The battery monomer 121 can include but is not limited to a lithium ion battery 1000, a sodium ion battery 1000, a sodium lithium ion battery 1000, a lithium metal battery 1000, a sodium metal battery 1000, a lithium sulfur battery 1000, a magnesium ion battery 1000, a nickel-hydrogen battery 1000, a nickel-cadmium battery 1000, a lead-acid battery 1000, etc.

[0071] Referring to FIG. 3, the battery monomer 121 can include an electrode assembly 1215, a housing 1236, and a cover plate 1212. The housing 1236 has a cavity and a mounting port. The electrode assembly 1215 is mounted in the cavity of the housing 1236 through the mounting port. The cover plate 1212 is connected with the housing 1236 and covers the mounting port. After the cover plate 1212 is connected with the housing 1236, the cover plate 1212 covers the mounting port to form a cavity accommodating the electrode assembly 1215. The cavity can accommodate one or more electrode assemblies 1215. The cavity is filled with an electrolyte, which can be liquid, gel or all-solid-state.

[0072] The battery cell 121 can further include a safety valve 1214 (may also be referred to as a pressure relief valve), two pole posts 1213, and two connecting members 1211 (may also be referred to as current collecting members). The safety valve 1214 can be disposed on the cover plate 1212, for example, the safety valve 1214 is fixed on the cover plate 1212. The safety valve 1214 is used to actuate to release the internal electrolyte when the internal pressure or temperature of the battery cell 121 reaches a threshold value, so as to reduce the internal pressure or temperature of the battery cell 121. For example, the safety valve 1214 can be a temperature-sensitive valve, and for another example, the safety valve 1214 can be a pressure-sensitive valve. The two pole posts 1213 can be disposed on the cover plate 1212, for example, the two pole posts 1213 are fixed on the cover plate 1212. The two pole posts 1213 are positive and negative pole posts respectively. One pole post 1213 is connected with one connecting member 1211. The connecting member 1211 is located between the cover plate 1212 and the electrode assembly 1215, and is used to electrically connect the electrode assembly 1215 and the pole post 1213.

[0073] The shell 1236 is a hollow structure. The material of the shell 1236 can be metal or plastic; for example, the material of the shell 1236 can be copper, iron, aluminum, steel, aluminum alloy, etc. For example, the shell 1236 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. The shape of the shell 1236 can be determined according to the specific shape of the electrode assembly 1215; for example, if the shape of the electrode assembly 1215 is a cuboid, the shell 1236 can be a cuboid shell; for another example, if the shape of the electrode assembly 1215 is a cylindrical shape, the shell 1236 can be a cylindrical shell.

[0074] For the convenience of describing the embodiments herein, a first direction X, a second direction Y, and a third direction Z are introduced. Any two of the first direction X, the second direction Y, and the third direction Z intersect. For example, the first direction X is perpendicular to the second direction Y and perpendicular to the third direction Z; the second direction Y is perpendicular to the third direction Z; to construct a three-dimensional orthogonal coordinate system. Among them, the first direction X intersects the end plate 13, for example, the first direction X is perpendicular to the end plate 13. The second direction Y intersects the side plate, for example, the second direction Y is perpendicular to the side plate. The third direction Z intersects the top plate, for example, the third direction Z is perpendicular to the top plate. Herein, the first direction X, the second direction Y, and the third direction Z can construct a three-dimensional orthogonal coordinate system are taken as examples for illustration.

[0075] The plurality of battery cells 121 can be arranged along at least one direction. In some examples, the plurality of battery cells 121 can be arranged in a column along the second direction Y. In other examples, the plurality of battery cells 121 can be arranged in a row along the first direction X. In other examples, referring to FIG. 4, the plurality of battery cells 121 can be arranged in multiple columns and multiple rows along the first direction X and the second direction Y.

[0076] In this document, the shape of the battery cell 121 is rectangular, and multiple battery cells 121 can be arranged in multiple columns and multiple rows along the first direction X and the second direction Y as an example. Referring to FIG. 4, the rectangular battery cell 121 can have a length, a width, and a height; accordingly, the first direction X is the width direction of the battery cell 121, the second direction Y is the length direction of the battery cell 121, and the third direction Z, the height direction of the battery module 1, and the height direction of the battery cell 121 are the same direction. The multiple battery cells 121 of the battery assembly 12 can be divided into M battery cell assemblies 127, and the M battery cell assemblies 127 are arranged along the length direction of the battery cell 121. The battery cell assembly 127 includes N battery cells 121, and the N battery cells 121 are arranged along the width direction of the battery cell 121. M and N are both positive integers, and N is greater than or equal to 2.

[0077] The first top surface 125 of the battery assembly 12 includes the third top surface of the multiple battery cells 121, and the third top surface of the battery cell 121 is the surface of the side of the cover plate 1212 away from the shell 1236. The first bottom surface 123 of the battery assembly 12 includes the third bottom surface of the multiple battery cells 121, and the third bottom surface of the battery cell 121 is the surface of the side of the shell 1236 away from the cover plate 1212. The first side surface 122 of the battery assembly 12 includes the third side surface of the edge battery cell of the M battery cell assemblies 127, and the third side surface of the battery cell 121 is the surface surrounded by the height and the length of the battery cell 121. The edge battery cell can be understood as the outermost battery cell 121 in each battery cell assembly 127 along the first direction X. The second side surface 124 of the battery assembly 12 includes the fourth side surface of the N battery cells 121 of the edge battery cell assembly, and the fourth side surface of the battery cell 121 is the surface surrounded by the height and the width of the battery cell 121. The edge battery cell assembly can be understood as the outermost battery cell assembly 127 in the M battery cell assemblies 127 along the second direction Y.

[0078] In some examples, the insulating suction members 11 are located on one side of the battery assembly 12 of the battery module 1 and in contact with the surface of the battery assembly 12; that is, the insulating suction members 11 are located on the surface of the battery assembly 12. The surface of the battery assembly 12 includes at least one of the first top surface 125, the first bottom surface 123, the first side surface 122 and the second side surface 124 of the battery assembly 12 described above. For example, the surface of the battery assembly 12 can be the first top surface 125 of the battery assembly 12, and the insulating suction members 11 are located on the first top surface 125 of the battery assembly 12. For another example, the surface of the battery assembly 12 can be the first side surface 122 of the battery assembly 12, and the insulating suction members 11 are located on the first side surface 122 of the battery assembly 12. For another example, the surface of the battery assembly 12 can be the second side surface 124 of the battery assembly 12, and the insulating suction members 11 are located on the second side surface 124 of the battery assembly 12. For another example, the surface of the battery assembly 12 can be the first top surface 125 and the first side surface 122 of the battery assembly 12, and the insulating suction members 11 are located on the first top surface 125 of the battery assembly 12 and on the first side surface 122 of the battery assembly 12; in this case, the number of insulating suction members 11 can be one, one insulating suction member 11 is located on the first top surface 125 of the battery assembly 12 and the other part of the insulating suction member 11 is bent to be located on the first side surface 122; of course, the number of insulating suction members 11 can be more than one, for example, two insulating suction members 11, one insulating suction member 11 is located on the first top surface 125 of the battery assembly 12, and the other insulating suction member 11 is located on the first side surface 122 of the battery assembly 12.

[0079] In other examples, the battery module 1 does not include a top plate and a side plate, the insulating suction members 11 are located on one side of the battery assembly 12 of the battery module 1 and are spaced apart from the surface of the battery assembly 12, and the insulating suction members 11 are in contact with the inner surface of the battery box 2, for example, the inner side surface and / or the inner top surface of the battery box 2. In other examples, the battery module 1 can include a top plate and a side plate, the insulating suction members 11 are located on one side of the battery assembly 12 of the battery module 1 and are spaced apart from the surface of the battery assembly 12, and the insulating suction members 11 are in contact with the side plate and / or the top plate; in this case, the insulating suction members 11 are not located on the surface of the battery assembly 12 and are not located on the inner surface of the battery box 2.

[0080] In some examples, the number of the insulation suction accessories 11 is multiple (for example, two, eight, etc.), the number of the battery modules 1 is multiple, the multiple battery modules 1 are arranged one by one with the multiple insulation suction accessories 11; one insulation suction accessory 11 is located on one side of the battery assembly 12 of one battery module 1. Among them, the multiple insulation suction accessories 11 can be connected into a whole, of course, the multiple insulation suction accessories 11 can also be independently arranged. In other examples, the number of the insulation suction accessories 11 is one, the number of the battery modules 1 is multiple, one insulation suction accessory 11 is located on one side of the battery assembly 12 of all the battery modules 1, and one insulation suction accessory 11 is arranged corresponding to the multiple battery modules 1. In other examples, the number of the insulation suction accessories 11 is one, the number of the battery modules 1 is one, and one insulation suction accessory 11 is located on one side of the battery assembly 12 of one battery module 1.

[0081] The insulation suction accessory 11 can be a structure with suction and insulation capabilities; for example, the insulation suction accessory 11 can be a porous base body, and the material of the porous base body can be ceramic, glass, or silica gel, etc. For another example, the insulation suction accessory 11 can be foam or sponge, etc. The insulation suction accessory 11 can be in the shape of a plate, a sheet, or a block, etc.; among them, the thickness of the plate is greater than the thickness of the sheet, and less than the thickness of the block. In this way, it is convenient to install the insulation suction accessory 11. The insulation suction accessory 11 can be a whole structure, that is, an integrated structure; for example, the insulation suction accessory 11 can be a plate. The insulation suction accessory 11 can also be a spliced structure spliced by multiple structures, for example, the insulation suction accessory 11 is spliced by multiple second suction parts 112 below.

[0082] In this embodiment, when the thermal runaway occurs in the battery monomer 121 of the battery module 1, the electrolyte and the thermal runaway product released by the battery monomer 121 are adsorbed by the insulation suction accessory 11, the amount of the electrolyte and the thermal runaway product released by the battery monomer 121 flowing into the battery module 1 is reduced, and the creepage distance between the electrified structure (for example, the tab) and the non-electrified conductive structure (for example, the end plate) remains unchanged or slightly decreases. Thus, the problem that the insulation performance between the electrified structure (for example, the tab) and the non-electrified conductive structure (for example, the end plate) is reduced due to the electrolyte and the thermal runaway product released by the battery monomer 121 located between the electrified structure (for example, the tab) and the non-electrified conductive structure (for example, the end plate) is solved.

[0083] In some examples, referring to FIG. 5, along the first direction X, there is a first gap d1 between the insulation suction accessory 11 and the end plate 13 of the battery module 1; the first direction X intersects the end plate 13 of the battery module 1.

[0084] Since the number of the end plate 13 is two, there is a first gap d1 between the insulation suction accessory 11 and the two end plates 13.

[0085] In some examples, the entire end plate 13 can be a conductive structure. In other examples, a portion of the end plate 13 can be a conductive structure and another portion can be an insulating structure.

[0086] In the present embodiment, the first gap between the insulating suction member 11 and the end plate 13 of the battery module 1 can prevent the insulating suction member 11 from contacting the end plate 13, thereby reducing the risk of short circuiting between the insulating suction member 11 and the end plate 13 after the insulating suction member 11 absorbs the electrolyte and the thermal runaway products.

[0087] In some embodiments, the first gap d1 is greater than or equal to 5 mm.

[0088] For example, the first gap can have a distance of 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 15 mm, 20 mm, 30 mm, 50 mm, 100 mm, etc.

[0089] In the present embodiment, the first gap d1 is greater than or equal to 5 mm, so that the creepage distance between the insulating suction member 11 and the end plate 13 of the battery module 1 is large, and the insulation capability between the insulating suction member 11 and the end plate 13 of the battery module 1 is strong.

[0090] In some embodiments, the insulating suction member 11 is located on only one side of the first surface 126 of the battery assembly 12; the first surface 126 extends along the first direction X and intersects the first side surface 122 of the battery assembly 12; the first direction X intersects the end plate 13 of the battery module 1; along the first direction X, the insulating suction member 11 extends beyond the first side surface 122 of the battery assembly 12, or the insulating suction member 11 is flush with the first side surface 122 of the battery assembly 12.

[0091] The insulating suction member 11 being located on only one side of the first surface 126 of the battery assembly 12 means that the insulating suction member 11 is not located on one side of the first side surface 122 of the battery assembly 12. The first surface 126 extends along the first direction X, which can be understood as the first surface 126 being parallel to the first direction X. In some examples, the first surface 126 of the battery assembly 12 can include at least one of the first top surface 125, the second side surface 124, and the first bottom surface 123 of the battery assembly 12; for example, the first surface 126 of the battery assembly 12 is the first top surface 125 of the battery assembly 12; for another example, the first surface 126 of the battery assembly 12 is the first bottom surface 123; for another example, the first surface 126 of the battery assembly 12 is the second side surface 124; for another example, the first surface 126 of the battery assembly 12 includes the first top surface 125 and the second side surface 124 of the battery assembly 12; for another example, the first surface 126 of the battery assembly 12 includes the first top surface 125, the second side surface 124, and the first bottom surface 123 of the battery assembly 12.

[0092] The first surface 126 intersects the first side surface 122 of the battery assembly 12; for example, the first surface 126 is perpendicular to the first side surface 122 of the battery assembly 12. The first side surface 122 of the battery assembly 12 is perpendicular to the first direction X, and the first direction X is perpendicular to the end plate 13, and at this time, the first side surface 122 is parallel to the end plate 13.

[0093] In the first direction X, the insulating suction member 11 exceeds the first side surface 122 of the battery assembly 12, which can be understood as, in the first direction X, the size of the insulating suction member 11 is greater than the size of the first surface 126. In the first direction X, the insulating suction member 11 is flush with the first side surface 122 of the battery assembly 12; which can be understood as, in the first direction X, the size of the insulating suction member 11 is equal to the size of the first surface 126.

[0094] In the present embodiment, the insulating suction member 11 exceeds the first side surface 122 of the battery assembly 12, or the insulating suction member 11 is flush with the first side surface 122 of the battery assembly 12; so that the insulating suction member 11 can cover more battery monomers 121, so that the insulating suction member 11 can suck more electrolyte and thermal runaway products released by the battery monomers 121, and reduce the amount of electrolyte and thermal runaway products in the battery module 1.

[0095] In some embodiments, referring to FIG. 6, the insulating suction member 11 is located between the first top surface 125 of the battery assembly 12 and the battery box 2; along the height direction of the battery module 1, there is a second gap d2 between the insulating suction member 11 and the top conductive structure on the first top surface 125 of the battery assembly 12.

[0096] The first top surface 125 of the battery assembly 12 is provided with a top conductive structure such as a bar, a circuit board, etc.; that is, the bar, the circuit board, etc. top conductive structure is mounted on the first top surface 125 of the battery assembly 12. Among them, the top conductive structure includes a charged structure and / or a non-charged conductive structure.

[0097] In some examples, the battery module 1 includes a top plate, and the insulating suction member 11 is arranged on the top plate of the battery module 1, at this time, the whole of the insulating suction member 11 and the top plate is located between the battery box 2 and the first top surface 125 of the battery assembly 12. For example, the insulating suction member 11 is detachably arranged on the top plate of the battery module 1 by bolts or buckles, etc. In other examples, the battery module 1 does not include a top plate, and the insulating suction member 11 is arranged on the inner top surface of the battery box 2, at this time, the insulating suction member 11 is located between the inner top surface of the battery box 2 and the first top surface 125 of the battery assembly 12. For example, the insulating suction member 11 is detachably arranged on the inner top surface of the battery box 2 by bolts or buckles, etc.

[0098] The top conductive structures on the first top surface 125 of the battery assembly 12 are multiple, and the second gap d2 between the insulating suction member 11 and the top conductive structures on the first top surface 125 of the battery assembly 12 means that the second gap d2 exists between the insulating suction member 11 and all the top conductive structures on the first top surface 125 of the battery assembly 12, that is, the insulating suction member 11 does not contact all the top conductive structures on the first top surface 125 of the battery assembly 12.

[0099] In the embodiment, the insulating suction member 11 is located between the first top surface 125 of the battery assembly 12 and the battery box body 2, so that the insulating suction member 11 can quickly adsorb the electrolyte and thermal runaway products released by the safety valve 1214 of the battery monomer 121, and reduce the amount of electrolyte and thermal runaway products flowing into the battery module 1. The second gap d2 between the insulating suction member 11 and the top conductive structure of the battery assembly 12 can prevent the insulating suction member 11 from contacting the top conductive structure on the first top surface 125 of the battery assembly 12, thereby reducing the risk of short circuit between the electrolyte and thermal runaway products adsorbed by the insulating suction member 11 and the top conductive structure on the first top surface 125 of the battery assembly 12.

[0100] In some embodiments, the second gap d2 is greater than or equal to 1 mm.

[0101] The second gap d2 has a distance of 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 15 mm, 20 mm, 30 mm, 50 mm, 100 mm, etc.

[0102] In the embodiment, the second gap d2 is greater than or equal to 1 mm, so that the creepage distance between the insulating suction member 11 and the top conductive structure on the first top surface 125 of the battery assembly 12 is large, and the insulation ability between the insulating suction member 11 and the top conductive structure on the first top surface 125 of the battery assembly 12 is strong.

[0103] In some embodiments, referring to FIGS. 4 and 7, the plurality of battery monomers 121 of the battery assembly 12 are divided into M battery monomer assemblies 127; the M battery monomer assemblies 127 are arranged along the length direction of the battery monomer 121; the battery monomer assembly 127 includes N battery monomers 121, and the N battery monomers 121 are arranged along the width direction of the battery monomer 121. The insulating suction member 11 includes M first suction portions 111; the M first suction portions 111 are arranged one by one with the M battery monomer assemblies 127, and the first suction portion 111 covers the safety valve 1214 of the N battery monomers 121 of the battery monomer assembly 127.

[0104] The first direction X is the width direction of the battery monomer 121, that is, the width direction of the battery monomer 121 intersects the end plate 13. The shape of the first adsorption part 111 can be a long strip shape, and at this time, the long side of the first adsorption part 111 is parallel to the width direction of the battery monomer 121.

[0105] In the present embodiment, the M first adsorption parts 111 are arranged at intervals along the length direction of the battery monomer 121, so that the total area of the insulating adsorption member 11 formed by the M first adsorption parts 111 is small, thereby saving the material of the insulating adsorption member 11 and reducing the cost of the insulating adsorption member 11. The M first adsorption parts 111 can adsorb all the electrolyte and thermal runaway products released by the safety valve 1214 of the battery monomer 121.

[0106] In some embodiments, the insulating adsorption member 11 can withstand a temperature above 300°C.

[0107] The insulating adsorption member 11 can be a high-temperature-resistant structure that can withstand a temperature above 300°C, that is, when the temperature of the battery monomer 121 is higher than 300°C, the insulating adsorption member 11 will not burn or melt, and can adsorb the electrolyte and thermal runaway products. The high-temperature-resistant structure can be normally used below 300°C.

[0108] In the present embodiment, after the battery monomer 121 undergoes thermal runaway, the temperature of the electrolyte and thermal runaway products released from the safety valve 1214 is high, and the high-temperature-resistant insulating adsorption member 11 can adsorb the electrolyte and thermal runaway products with high temperature.

[0109] In some embodiments, referring to FIG. 8, the insulating adsorption member 11 is arranged on the second side surface 124 of the battery assembly 12; the second side surface 124 of the battery assembly 12 intersects the end plate 13 of the battery module 1.

[0110] The insulating adsorption member 11 is arranged on the second side surface 124 of the battery assembly 12 by using a bandage, adhesive tape, glue, etc. The insulating adsorption member 11 can cover the entire second side surface 124 of the battery assembly 12. The insulating adsorption member 11 can also cover part of the second side surface 124 of the battery assembly 12, and the other part of the second side surface 124 is not covered by the insulating adsorption member 11.

[0111] In some examples, the battery module 1 comprises a side plate, and the insulating suction member 11 is arranged on the second side surface 124; so that the insulating suction member 11 is located between the second side surface 124 of the battery assembly 12 and the side plate. In other examples, the battery module 1 does not comprise a side plate, and the insulating suction member 11 is arranged on the second side surface 124, so that the insulating suction member 11 is located between the second side surface 124 and the inner side surface of the battery box 2; the insulating suction member 11 can adsorb the electrolyte and thermal runaway products released by the safety valve 1214 of the battery monomer 121, so that the insulating suction member 11 can also play a role in protecting the second side surface 124 of the battery assembly 12 (i.e. the same role as the side plate in protecting the battery assembly 12).

[0112] After the battery monomer 121 occurs thermal runaway, part of the temperature of the electrolyte and thermal runaway products released by the thermal runaway battery monomer 121 will be absorbed by other structures (for example, battery monomers 121 that do not occur thermal runaway, and for example, the battery box 2) in the battery module 1, so that the temperature of the electrolyte and thermal runaway products flowing to the second surface of the battery assembly 12 will decrease. Therefore, the insulating suction member 11 arranged on the second side surface 124 can not be a high-temperature-resistant structure. Of course, the insulating suction member 11 arranged on the second side surface 124 can be the above-mentioned high-temperature-resistant structure.

[0113] In the present embodiment, the insulating suction member 11 is arranged on the second side surface 124 of the battery assembly 12, which is conducive to the insulating suction member 11 can adsorb more electrolyte and thermal runaway products. The second side surface 124 of the battery assembly 12 has no conductive structure, thereby reducing the installation difficulty of the insulating suction member 11.

[0114] In some embodiments, the insulating suction member 11 covers the entire second side surface 124 of the battery assembly 12.

[0115] The insulating suction member 11 covers the entire second side surface 124 of the battery assembly 12, which can be understood as that the orthographic projection of the insulating suction member 11 on the second side surface 124 covers the entire second side surface 124.

[0116] In the present embodiment, the insulating suction member 11 covers the entire second side surface 124 of the battery assembly 12, so that the volume of the insulating suction member 11 is larger, and the adsorption capacity of the insulating suction member 11 is stronger, which is conducive to absorbing more electrolyte and thermal runaway products of the battery monomer 121.

[0117] In some embodiments, referring to FIGS. 9-12, a explosion-proof valve 15 is arranged on one side of the first side surface 122 of the battery assembly 12; in the first direction X and away from the explosion-proof valve 15, the adsorption performance of the insulating suction member 11 decreases; the first direction X intersects the end plate 13 of the battery module 1.

[0118] Referring to FIG. 9, when the number of explosion-proof valves 15 is one, the direction along the first direction X and away from the explosion-proof valve 15 can be a direction along the first direction X and from the first side 122 provided with the explosion-proof valve 15 to the first side 122 without the explosion-proof valve 15; for example, the direction is a direction of the arrow of the first direction X shown in FIG. 9. Along the direction, the adsorption performance of the insulating adsorption accessory 11 decreases all the time and does not increase.

[0119] Referring to FIG. 11, when the number of explosion-proof valves 15 is two, the direction along the first direction X and away from the explosion-proof valve 15 can be a direction along the first direction X and from the first side 122 provided with the explosion-proof valve 15 to the middle of the battery assembly 12; for example, the direction is a bidirectional direction of the arrow of the first direction X and the opposite direction shown in FIG. 11. Along the direction, the adsorption performance of the insulating adsorption accessory 11 decreases first and then increases. Of course, when the number of explosion-proof valves 15 is two, the direction along the first direction X and away from the explosion-proof valve 15 can be a direction along the first direction X and from the first side 122 provided with one explosion-proof valve 15 to the first side 122 provided with the other explosion-proof valve 15; for example, the direction is a direction of the arrow of the first direction X shown in FIG. 11. Along the direction, the adsorption performance of the insulating adsorption accessory 11 decreases all the time and does not increase.

[0120] Hereinafter, when the number of explosion-proof valves 15 is one, the direction along the first direction X and away from the explosion-proof valve 15 can be taken as an example and explained as a direction along the first direction X and from the first side 122 provided with the explosion-proof valve 15 to the first side 122 without the explosion-proof valve 15. For example, the explosion-proof valve 15 can be arranged on the end plate 13.

[0121] The size of the adsorption performance of the insulating adsorption accessory 11 is determined by parameters of the insulating adsorption accessory 11, which can include at least one of the height, thickness, material, etc. of the insulating adsorption accessory 11. In some examples, the size of the adsorption performance of the insulating adsorption accessory 11 can be changed by changing the height of the insulating adsorption accessory 11. For example, along the first direction X and away from the explosion-proof valve 15, the height of the insulating adsorption accessory 11 decreases, so that the adsorption performance of the insulating adsorption accessory 11 in the direction decreases. In other examples, the size of the adsorption performance of the insulating adsorption accessory 11 can be changed by changing the thickness of the insulating adsorption accessory 11. For example, along the first direction X and away from the explosion-proof valve 15, the thickness of the insulating adsorption accessory 11 decreases, so that the adsorption performance of the insulating adsorption accessory 11 in the direction decreases. Hereinafter, along the first direction X and away from the explosion-proof valve 15, the height of the insulating adsorption accessory 11 decreases, so that the adsorption performance of the insulating adsorption accessory 11 in the direction decreases, is taken as an example and explained.

[0122] In the embodiment, the adsorption capacity of the insulating adsorption member 11 on the side close to the explosion-proof valve 15 is greater than the adsorption capacity of the insulating adsorption member 11 on the side far from the explosion-proof valve 15, so that the insulating adsorption member 11 on the side close to the explosion-proof valve 15 can adsorb more electrolyte and thermal runaway products released by the safety valve 1214 of the battery monomer 121.

[0123] In some embodiments, referring to FIGS. 9-12, the height of the insulating adsorption member 11 gradually decreases in the first direction X and in the direction away from the explosion-proof valve 15; and the minimum height of the insulating adsorption member 11 is greater than the height of the shell insulating film 1237 of the battery monomer 121.

[0124] Referring to FIG. 3, the battery monomer 121 can further include a shell insulating film 1237 wrapped on the outside of the shell 1236 to protect the shell 1236.

[0125] The insulating adsorption member 11 has a second top surface and a second bottom surface opposite in the third direction Z. The gradually decreasing height of the insulating adsorption member 11 can be understood as that the distance between the second top surface and the second bottom surface of the insulating adsorption member 11 in the third direction Z gradually decreases in the first direction X. In some examples, the second bottom surface of the insulating adsorption member 11 is a plane, and the second top surface of the insulating adsorption member 11 is a non-plane (for example, an inclined curved surface, an inclined plane, or a stepped surface), so that the height of the insulating adsorption member 11 gradually decreases. Of course, the second top surface and the second bottom surface of the insulating adsorption member 11 can both be non-planes, so that the distance between the second top surface and the second bottom surface of the insulating adsorption member 11 gradually decreases. Here, the second bottom surface of the insulating adsorption member 11 is taken as a plane, and the second top surface of the insulating adsorption member 11 is taken as a non-plane for illustration.

[0126] When the number of the explosion-proof valve 15 is one, the height of the insulating adsorption member 11 gradually decreases in the first direction X and in the direction away from the explosion-proof valve 15, and does not increase.

[0127] In the embodiment, the height of the insulating adsorption member 11 gradually decreases in the first direction X and in the direction away from the explosion-proof valve 15, so that the adsorption performance of the insulating adsorption member 11 gradually decreases. The minimum height of the insulating adsorption member 11 is greater than the height of the shell insulating film 1237 of the battery monomer 121, which can reduce the risk that the electrolyte and the thermal runaway product directly contact the shell insulating film 1237.

[0128] In addition, because the height of the insulating adsorption member 11 gradually decreases, the insulating adsorption member 11 covers a part of the second side surface 124, and another part of the second side surface 124 is exposed; so that the insulating adsorption member 11 can adsorb the electrolyte and the thermal runaway product released by the battery monomer 121, while saving costs.

[0129] In some embodiments, the second top surface of the insulating suction member 11 is a sloping surface or a stepped surface with a gradually decreasing height in the first direction X and away from the explosion-proof valve 15.

[0130] Referring to FIG. 10, the sloping surface can be a sloping curved surface. For example, the sloping curved surface can be a concave sloping curved surface. For another example, the sloping curved surface can be a convex sloping curved surface. The sloping surface can also be a sloping flat surface as shown in FIG. 9.

[0131] Since the thickness of the sheet and the film and the like can be negligible, the top surface of the insulating suction member 11 can be referred to as a top edge of the insulating suction member 11 when the insulating suction member 11 is in a structure with a thinner sheet or film.

[0132] In the present embodiment, the second top surface of the insulating suction member 11 is a sloping surface or a stepped surface with a gradually decreasing height, so that the height of the insulating suction member 11 gradually decreases.

[0133] In some embodiments, referring to FIG. 12, the insulating suction member 11 includes N second suction portions 112 arranged along the first direction X. The heights of the N second suction portions 112 gradually decrease in the first direction X and away from the explosion-proof valve 15.

[0134] In some examples, the top surface and the bottom surface of the second suction portion 112 are both flat surfaces, the bottom surfaces of the plurality of second suction portions 112 are flush, and the heights of the N second suction portions 112 gradually decrease, so that the top surfaces and part of the side surfaces of the N second suction portions 112 form a stepped surface.

[0135] In the present embodiment, the N second suction portions 112 can be combined to form an insulating suction member 11 arranged on the second side surface 124. When any of the second suction portions 112 is damaged, the damaged second suction portion 112 can be replaced, thereby saving costs.

[0136] In some embodiments, referring to FIG. 12, the plurality of battery cells 121 of the battery assembly 12 are divided into M battery cell assemblies 127. The M battery cell assemblies 127 are arranged along the length direction of the battery cell 121. The battery cell assembly 127 includes N battery cells 121 arranged along the width direction of the battery cell 121. The width direction of the battery cell 121 is the first direction X. The N second suction portions 112 are arranged one-to-one corresponding to the N battery cells 121 of the most edge battery cell assembly of the M battery cell assemblies 127.

[0137] In some examples, there is a third gap between the N battery monomers 121 of the battery monomer assembly 127 along the width direction of the battery monomer 121; the size of the second adsorption part 112 along the width direction of the battery monomer 121 is the sum of the size of the battery monomer 121 and the size of the third gap. In some examples, the N battery monomers 121 of the battery monomer assembly 127 are in contact with each other (i.e. no third gap) along the width direction of the battery monomer 121; the size of the second adsorption part 112 along the width direction of the battery monomer 121 is equal to the size of the battery monomer 121.

[0138] In the present embodiment, the N second adsorption parts 112 are arranged one-to-one corresponding to the N battery monomers 121 of the most edge battery monomer assembly of the M battery monomer assemblies 127, so that the volume of the second adsorption part 112 is small; when the damaged second adsorption part 112 needs to be replaced, more cost can be saved.

[0139] In some embodiments, the battery module 1 further comprises a binding belt, which binds the insulating adsorption accessory 11 on the second side 124 of the battery assembly 12.

[0140] The binding belt can be a steel belt, a plastic belt, etc. The number of binding belts can be one or more. In some examples, the binding belt is used to bind the battery assembly 12, the end plate 13 and the insulating adsorption accessory 11 into one whole.

[0141] In the present embodiment, the binding belt can quickly fix the insulating adsorption accessory 11 on the second side 124 of the battery assembly 12.

[0142] In some embodiments, the number of battery modules 1 is multiple, and one insulating adsorption accessory 11 is arranged between the second sides 124 of the battery assemblies 12 of two adjacent battery modules 1 and is in contact with the second side 124; the second side 124 of the battery assembly 12 intersects with the end plate of the battery module 1.

[0143] In the present embodiment, the battery module 1 has no side plate, so that one insulating adsorption accessory 11 is in contact with the second side 124 of the battery assembly 12 of two adjacent battery modules 1. The second side 124 of the battery assembly 12 of the outermost battery module 1 can also be provided with an insulating adsorption accessory 11.

[0144] In the present embodiment, one insulating adsorption accessory 11 can adsorb the electrolyte and thermal runaway products released by the battery monomers of the battery assemblies 12 of two adjacent battery modules 1, and protect the second side 124 of the battery assembly 12. Thus, the side plate of the battery module 1 can be removed to reduce the weight of the battery.

[0145] The above merely describes the embodiments of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. A battery, wherein, The battery includes a battery box, an insulating suction accessory, and a battery module, the battery module and the insulating suction accessory are both installed in the battery box, the insulating suction accessory is located on one side of a battery assembly of the battery module, the battery assembly includes a plurality of battery monomers, the insulating suction accessory is configured to adsorb electrolyte and thermal runaway products released by at least one battery monomer of the battery assembly, and the insulating suction accessory is in the shape of a plate, a sheet, or a block.

2. The battery of claim 1, wherein, In a first direction, a first gap exists between the insulating suction accessory and an end plate of the battery module; the first direction intersects the end plate of the battery module.

3. The battery of claim 2, wherein, The first gap is greater than or equal to 5 mm.

4. The battery of any one of claims 1-3, wherein, The insulating suction accessory is located on one side of a first surface of the battery assembly; the first surface extends in a first direction and intersects a first side surface of the battery assembly; the first direction intersects the end plate of the battery module; In the first direction, the insulating suction accessory protrudes beyond the first side surface of the battery assembly, or the insulating suction accessory is flush with the first side surface of the battery assembly.

5. The battery of any one of claims 1-4, wherein, The insulating suction accessory is located between a first top surface of the battery assembly and the battery box; in a height direction of the battery module, a second gap exists between the insulating suction accessory and a top conductive structure on the first top surface of the battery assembly.

6. The battery of claim 5, wherein, The second gap is greater than or equal to 1 mm.

7. The battery of claim 5 or 6, wherein, The plurality of battery monomers of the battery assembly are divided into M battery monomer assemblies; the M battery monomer assemblies are arranged in a length direction of the battery monomer; the battery monomer assembly includes N battery monomers arranged in a width direction of the battery monomer; The insulating suction accessory includes M first suction portions; the M first suction portions are arranged in the length direction of the battery monomer; the M first suction portions are arranged one-to-one with the M battery monomer assemblies, and the first suction portion covers a safety valve of the N battery monomers of the battery monomer assembly.

8. The battery of any one of claims 5-7, wherein, The insulating suction accessory can withstand a temperature of 300°C or higher.

9. The battery of any one of claims 1-8, wherein, The insulating suction accessory is arranged on a second side surface of the battery assembly; the second side surface of the battery assembly intersects the end plate of the battery module.

10. The battery of claim 9, wherein, The insulating suction accessory covers the entire second side surface of the battery assembly.

11. The battery of claim 9 or 10, wherein, An explosion-proof valve is arranged on one side of the first side surface of the battery assembly; in a first direction, and away from the explosion-proof valve In the first direction, the adsorption performance of the insulation adsorption member decreases; the first direction intersects the end plate of the battery module.

12. The battery of claim 11, wherein, In the first direction and away from the explosion-proof valve, the height of the insulation adsorption member gradually decreases; the minimum height of the insulation adsorption member is greater than the height of the shell insulation film of the battery cell.

13. The battery of claim 12, wherein, In the first direction and away from the explosion-proof valve, the second top surface of the insulation adsorption member is a slope or a stepped surface with gradually decreasing height.

14. The battery of claim 12, wherein, The insulation adsorption member includes N second adsorption parts, and the N second adsorption parts are arranged along the first direction; In the first direction and away from the explosion-proof valve, the height of the N second adsorption parts gradually decreases.

15. The battery of claim 14, wherein, The plurality of battery cells of the battery assembly are divided into M battery cell assemblies; the M battery cell assemblies are arranged along the length direction of the battery cell; the battery cell assembly includes N battery cells, and the N battery cells are arranged along the width direction of the battery cell; the width direction of the battery cell is the first direction; In the width direction of the battery cell, the size of the second adsorption part is equal to the size of the battery cell; and the N second adsorption parts are arranged one-to-one corresponding to the N battery cells of the M battery cell assemblies.

16. The battery of any one of claims 1-15, wherein, The battery module further includes a binding belt, and the binding belt binds the insulation adsorption member on the second side of the battery assembly.

17. The battery of any one of claims 1-16, wherein, The number of the battery modules is multiple, one insulation adsorption member is arranged between the second sides of the battery assemblies of two adjacent battery modules and is in contact with the second sides; the second side of the battery assembly intersects the end plate of the battery module.

18. An electrical device, comprising: The battery includes an electric device and the battery of any one of claims 1-17, and the battery is electrically connected to the electric device.

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