Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, and relates to the technical field of batteries. The battery comprises a first battery cell and a second battery cell, the first battery cell is provided with a first surface, and the first battery cell is provided with a first pressure relief mechanism arranged on the first surface. The second battery cell is provided with a second surface, and the second battery cell is provided with a second pressure relief mechanism arranged on the second surface. The first surface and the second surface are oppositely arranged in the first direction, and the first pressure relief mechanism and the second pressure relief mechanism are arranged in a staggered mode in the first direction. According to the battery, the first pressure relief mechanism of the first battery monomer and the second pressure relief mechanism of the second battery monomer which are oppositely arranged are arranged in a staggered manner, so that the situation that one of the two battery monomers which are oppositely arranged is subjected to thermal runaway and then is subjected to pressure relief by the pressure relief mechanisms is prevented, and high-temperature emissions are oppositely sprayed to the other opposite battery monomer; therefore, heat spreading of the whole pack caused by thermal runaway of the single batteries is relieved or eliminated, and the safety failure risk of the batteries is reduced.

Description

[0001] CROSS-REFERENCE

[0002] This application claims priority to International Patent Application No. PCT / CN2022 / 113154 entitled “Battery and Power Device” filed on August 17, 2022, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

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

[0004] In the use of the battery, when one of the battery monomers in the battery occurs thermal runaway, the battery monomer that occurs thermal runaway will quickly affect other battery monomers that do not occur thermal runaway, thereby causing whole pack thermal propagation, so that the whole battery is in a dangerous state. SUMMARY

[0005] In view of the above problems, the present application provides a battery and a power device, which can improve the technical problem of heat diffusion between battery monomers.

[0006] In a first aspect, the present application provides a battery, comprising: a first battery monomer and a second battery monomer, the first battery monomer is configured with a first surface, the first battery monomer has a first pressure relief mechanism arranged on the first surface. The second battery monomer is configured with a second surface, the second battery monomer has a second pressure relief mechanism arranged on the second surface. The first surface and the second surface are oppositely arranged along a first direction, and the first pressure relief mechanism and the second pressure relief mechanism are arranged in a staggered manner along the first direction.

[0007] In the technical scheme of the embodiments of the present application, the battery of the present application prevents the high-temperature exhaust from being sprayed to the opposite battery monomer by the pressure relief mechanism when one of the oppositely arranged two battery monomers occurs thermal runaway, thereby alleviating or eliminating the whole pack thermal propagation caused by the thermal runaway of the battery monomer, and reducing the safety failure risk of the battery.

[0008] In some embodiments, the first surface and the second surface are oppositely arranged along the first direction. The oppositely arranged first surface and second surface along the first direction enable the first battery monomer and the second battery monomer to be arranged in order in the battery box, thereby improving the space utilization of the battery and further improving the energy density of the battery.

[0009] In some embodiments, the first pressure relief mechanism is located at an edge of the first surface, and the second pressure relief mechanism is located at a middle or an edge of the second surface. When the first pressure relief mechanism is located at an edge of the first surface, and the second pressure relief mechanism is located at a middle or an edge of the second surface, the first pressure relief mechanism and the second pressure relief mechanism can be arranged in a staggered manner along the first direction, so as to prevent the battery cell after thermal runaway from spraying to the opposite battery cell, slow down the heat spread of the whole pack, and improve the safety performance of the battery.

[0010] In some embodiments, a line connecting the center of the first surface and the center of the second surface forms a center line. Along the second direction, the first pressure relief mechanism and the second pressure relief mechanism are located on the opposite sides of the center line, and the second direction is perpendicular to the first direction. The first pressure relief mechanism and the second pressure relief mechanism located on the opposite sides of the center line are arranged in a staggered manner, so as to prevent the battery cell after thermal runaway from spraying to the opposite battery cell, slow down the heat spread of the whole pack, and improve the safety performance of the battery.

[0011] In some embodiments, the first surface and the second surface are arranged in a staggered manner along the first direction. The first surface and the second surface arranged in a staggered manner along the first direction enable the first pressure relief mechanism and the second pressure relief mechanism to be arranged in a staggered manner along the first direction, so as to prevent the battery cell after thermal runaway from spraying to the opposite battery cell, slow down the heat spread of the whole pack, and improve the safety performance of the battery.

[0012] In some embodiments, the first pressure relief mechanism and the second pressure relief mechanism are respectively located at the middle of the first surface and the second surface along the third direction, and the third direction is perpendicular to the first direction. In the case where the first surface and the second surface are arranged in a staggered manner along the first direction, the first pressure relief mechanism and the second pressure relief mechanism respectively located at the middle of the first surface and the second surface along the third direction are arranged in a staggered manner, so as to prevent the battery cell after thermal runaway from spraying to the opposite battery cell, slow down the heat spread of the whole pack, and improve the safety performance of the battery, and even if some incorrect installation modes occur during the installation of the battery cell, for example, the installation positions corresponding to the first battery cell and the second battery cell are incorrect, the first pressure relief mechanism and the second pressure relief mechanism can still be arranged in a staggered manner.

[0013] In some embodiments, the first battery cell includes a first center line parallel to the first direction, the first center line passing through a center of the first surface, and the second battery cell includes a second center line parallel to the first direction, the second center line passing through a center of the second surface. The first pressure relief mechanism is located on a side of the first center line close to the second center line, and the second pressure relief mechanism is located on a side of the second center line away from the first center line along a third direction perpendicular to the first direction. When the first surface and the second surface are arranged staggered along the first direction, the first pressure relief mechanism located on the side of the first center line close to the second center line and the second pressure relief mechanism located on the side of the second center line away from the first center line are arranged staggered, thereby preventing the battery cell after thermal runaway from jetting to the opposite battery cell, slowing down the whole pack heat spread, and improving the safety performance of the battery.

[0014] In some embodiments, the battery further includes an exhaust mechanism arranged between the first battery cell and the second battery cell, the exhaust mechanism having a first pressure relief portion and a second pressure relief portion, the first pressure relief portion being configured to receive the exhaust of the first battery cell via the first pressure relief mechanism, and the second pressure relief portion being configured to receive the exhaust of the second battery cell via the second pressure relief mechanism. The first pressure relief portion and the second pressure relief portion of the exhaust mechanism are both configured to provide a pressure relief path for the pressure relief mechanisms of the battery cells, so that the battery cells can be relieved according to the preset path.

[0015] In some embodiments, the first pressure relief portion and the second pressure relief portion are arranged staggered along the first direction. When the first pressure relief portion and the second pressure relief portion are arranged staggered along the first direction, the battery cell after thermal runaway can be prevented from jetting to the opposite battery cell, the whole pack heat spread is slowed down, and the safety performance of the battery is improved.

[0016] In some embodiments, the exhaust mechanism further includes a blocking piece, the first pressure relief portion and the second pressure relief portion are arranged opposite along the first direction, and the blocking piece is arranged between the first pressure relief portion and the second pressure relief portion. The blocking piece can block the high-temperature exhaust of the battery cell after thermal runaway from jetting to the opposite battery cell, thereby relieving or eliminating the whole pack heat spread caused by the battery cell after thermal runaway, and reducing the safety failure risk of the battery.

[0017] In some embodiments, the first pressure relief portion is configured as at least one of a through hole and a weak structure, and / or the second pressure relief portion is configured as at least one of a through hole and a weak structure. When the first pressure relief portion and / or the second pressure relief portion is a through hole, the exhaust of the battery cell can be relieved through the through hole; when the first pressure relief portion and / or the second pressure relief portion is a weak structure, the exhaust of the battery cell can break through the weak structure when a preset pressure is generated.

[0018] In some embodiments, the flow channel is integrated in the exhaust mechanism, and the flow channel is configured to accommodate a heat exchange medium. The heat exchange medium is capable of absorbing heat from the high-temperature exhaust emitted by the battery cell in thermal runaway, reducing the temperature of the entire battery, and improving the safety of the battery.

[0019] In some embodiments, the exhaust mechanism further comprises a heat exchange portion, and the flow channel is disposed in the heat exchange portion. The heat exchange portion is configured to exchange heat with the high-temperature exhaust emitted by the battery cell in thermal runaway, reducing the temperature of the entire battery, and improving the safety of the battery.

[0020] In some embodiments, the exhaust mechanism has a liquid inlet and a liquid outlet at two ends thereof, respectively, and the liquid inlet and the liquid outlet are in communication with the flow channel. The heat exchange medium in the flow channel is in a flow state, which can better balance the temperature in the entire battery.

[0021] In some embodiments, the battery comprises a plurality of first battery cell groups and a plurality of second battery cell groups extending along a fourth direction perpendicular to the first direction, the first battery cell group comprises a plurality of first battery cells, the second battery cell group comprises a plurality of second battery cells, and the plurality of first battery cell groups and the plurality of second battery cell groups are alternately distributed along the first direction. The plurality of battery cells in the battery are arranged in an orderly manner, which can ensure the structural strength of the entire battery and improve the energy density of the battery.

[0022] In some embodiments, the battery further comprises an exhaust mechanism, and the exhaust mechanism is disposed between the first battery cell group and at least one second battery cell group adjacent to the first battery cell group. The exhaust mechanism has a first pressure relief portion and a second pressure relief portion corresponding to the first pressure relief mechanism and the second pressure relief mechanism, respectively. The first pressure relief portion and the second pressure relief portion of the exhaust mechanism are both configured to provide a pressure relief path for the pressure relief mechanism of the battery cell, so that the battery cell can be relieved according to a preset path.

[0023] In some embodiments, the first battery cell group and the second battery cell group are distributed in multiple layers in the height direction of the battery. The plurality of battery cells in the battery are arranged in multiple layers in an orderly manner, which can improve the space utilization and thus improve the energy density of the battery.

[0024] In a second aspect, the application provides an electric device comprising the battery in the above embodiments, and the battery is configured to provide electric energy.

[0025] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the above description can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the application thereto. Like reference numerals are used to refer to like elements throughout. In the drawings:

[0027] Figure 1 Structure diagram of a vehicle for some embodiments of the present application;

[0028] Figure 2 Structure diagram of a battery for some embodiments of the present application;

[0029] Figure 3 Structure diagram of a battery cell for some embodiments of the present application;

[0030] Figure 4 Structure diagram of a first battery for some embodiments of the present application from a first perspective;

[0031] Figure 5 Structure diagram of a first battery for some embodiments of the present application from a second perspective;

[0032] Figure 6 Structure diagram of a first battery for some embodiments of the present application from a top view;

[0033] Figure 7 Structure diagram of a second battery for some embodiments of the present application from a top view;

[0034] Figure 8 Structure diagram of a third battery for some embodiments of the present application from a top view;

[0035] Figure 9 Structure diagram of a fourth battery for some embodiments of the present application from a top view;

[0036] Figure 10 Structure diagram of a fifth battery for some embodiments of the present application;

[0037] Figure 11 Structure diagram of a fifth battery for some embodiments of the present application from a top view;

[0038] Figure 12 Structure diagram of a sixth battery for some embodiments of the present application from a top view;

[0039] Figure 13 Structure diagram of a first battery for some embodiments of the present application from a top view;

[0040] Figure 14 Structure diagram of a fifth battery for some embodiments of the present application from a top view;

[0041] Figure 15 A structural diagram of a fifth battery for some embodiments of the present application.

[0042] Reference signs in the detailed description of the embodiments are as follows:

[0043] 1000 - vehicle;

[0044] 100 - battery; 200 - controller; 300 - motor;

[0045] 10 - case; 11 - first part; 12 - second part;

[0046] 20 - battery cell; 21 - end cover; 22 - housing; 23 - electrode assembly;

[0047] 101 - first direction; 102 - second direction; 103 - center line; 104 - third direction; 105 - fourth direction;

[0048] 110 - first battery cell; 111 - first surface; 112 - first pressure relief mechanism; 113 - third surface; 114 - first electrode terminal; 115 - first center line;

[0049] 120 - second battery cell; 121 - second surface; 122 - second pressure relief mechanism; 123 - fourth surface; 124 - second electrode terminal; 125 - second center line;

[0050] 130 - exhaust mechanism; 131 - first pressure relief portion; 132 - second pressure relief portion; 133 - barrier; 134 - heat exchange portion. DETAILED DESCRIPTION

[0051] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0053] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0054] Reference within this document 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 of the application. 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 mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments unless explicitly stated otherwise.

[0055] In the description of the embodiments of the present application, the term "and / or" is merely used to describe associated objects, and can represent that three conditions can exist, for example, A and / or B can mean that the three conditions of A alone, A and B, and B alone can exist. In addition, the character " / " in the present application generally means that the preceding and following associated objects are in an "or" relationship.

[0056] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0057] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0060] The applicant finds that during the use of the battery, when one of the battery monomers in the battery occurs thermal runaway, the adjacent battery monomers are easily affected and also occur thermal runaway, leading to further uncontrollable of the battery pack, and thus causing fire, explosion and other accidents.

[0061] The applicant finds that the high-temperature emissions in the battery monomer that occurs thermal runaway are ejected from the pressure relief mechanism due to the high pressure, and when the pressure relief mechanisms of the adjacent battery monomers are relatively arranged, it is easy to cause the emissions in the battery monomer that occurs thermal runaway to be ejected from the pressure relief mechanism to the pressure relief mechanism of the opposite battery monomer. The emissions are easy to affect the actuation threshold of the pressure relief mechanism of the opposite battery monomer due to its high temperature, high pressure and other characteristics, thereby causing the opposite battery monomer to also occur thermal runaway, and further causing the whole pack to spread heat, so that the whole battery is in a dangerous state.

[0062] In order to alleviate the problem of heat diffusion between the battery monomers, the inventor finds that the pressure relief mechanisms of the opposite battery monomers can be arranged in a staggered manner, so as to improve or eliminate the heat diffusion between the battery monomers.

[0063] Based on the above considerations, in order to alleviate the problem of heat diffusion between the battery monomers, the inventor has designed a battery through the staggered arrangement of the first pressure relief mechanism of the first battery monomer and the second pressure relief mechanism of the second battery monomer arranged oppositely, so as to prevent the high-temperature emissions ejected from the pressure relief mechanism of one of the two oppositely arranged battery monomers that occurs thermal runaway from being ejected to the opposite battery monomer, and further alleviate or eliminate the whole pack heat spread caused by the thermal runaway of the battery monomer, thereby reducing the safety failure risk of the battery.

[0064] The battery mentioned in the embodiments of the present application refers to a single physical module including a plurality of battery monomers to provide higher voltage and capacity. The battery generally includes a battery box for packaging a plurality of battery monomers, which can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery monomers.

[0065] The battery cell can include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc. The embodiments of the present application are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. The embodiments of the present application are not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft package battery cells.

[0066] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer, and the positive current collector without the positive active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative current collector and a negative active material layer, and the negative active material layer is coated on the surface of the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer, and the negative current collector without the negative active material layer serves as a negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. In order to ensure that the fuse does not occur when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be polypropylene (PP) or polyethylene (PE), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure, and the embodiments of the present application are not limited thereto.

[0067] The battery cell further includes a current collecting member for electrically connecting the electrode tabs of the battery cell and the electrode terminals to deliver electrical energy from the electrode assembly to the electrode terminals, and then to the outside of the battery cell through the electrode terminals. The plurality of battery cells are electrically connected through the busbar component to realize series connection, parallel connection, or mixed connection of the plurality of battery cells.

[0068] The battery further includes a sampling terminal and a battery management system. The sampling terminal is connected to the busbar component and is used to collect information of the battery cell, such as voltage or temperature, etc. The sampling terminal transmits the collected information of the battery cell to the battery management system. When the battery management system detects that the information of the battery cell is out of the normal range, it will limit the output power of the battery to achieve safety protection.

[0069] It can be understood that the power consuming device to which the battery is applied in the embodiments of the present application can be in various forms, for example, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy and an electric tool, 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.

[0070] The battery cell and the battery described in the embodiments of the present application are not only limited to the power consuming device described above, but also can be applied to all power consuming devices using the battery cell and the battery. For the sake of simplicity, the following embodiments are described by taking the electric automobile as an example.

[0071] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a vehicle is provided for some embodiments of the present application. The vehicle 1000 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 vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0072] In some embodiments of the present application, the battery 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0073] Please refer to Figure 2 , Figure 2An exploded view of a battery is provided for some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, which is accommodated in the box 10. The box 10 is configured to provide a space for accommodating the battery cell 20, and the box 10 can have various structures. In some embodiments, the box 10 can include a first part 11 and a second part 12, which are coupled to each other to define a space for accommodating the battery cell 20. The second part 12 can be a hollow structure with an open end, and the first part 11 can be a plate structure, which is coupled to the open end of the second part 12 to define the space for accommodating the battery cell 20 together with the second part 12. Alternatively, the first part 11 and the second part 12 can both be hollow structures with an open end, and the open end of the first part 11 is coupled to the open end of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0074] In the battery 100, the battery cell 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the multiple battery cells 20 are accommodated in the box 10. Of course, the battery 100 can also be that the multiple battery cells 20 are connected in series, in parallel, or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box 10. The battery 100 can further include other structures, for example, the battery 100 can further include a busbar component for electrically connecting the multiple battery cells 20.

[0075] Each battery cell 20 can be a secondary battery or a primary battery, and can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes.

[0076] Please refer to Figure 3 , Figure 3 An exploded view of a battery cell is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit of a battery. As Figure 3 , the battery cell 20 includes an end cap 21, a case 22, an electrode assembly 23, and other functional components.

[0077] The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21 is less likely to deform when subjected to extrusion collision, allowing the battery cell 20 to have higher structural strength and improved safety performance. The end cover 21 can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0078] The shell 22 is a component for fitting the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 22, the end cover 21 is covered on the shell 22. The shell 22 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0079] The electrode assembly 23 is a component in which an electrochemical reaction occurs in the battery cell 20. One or more electrode assemblies 23 can be contained within the case 22. The electrode assembly 23 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0080] According to some embodiments of the present application, please refer to Figures 4-6 , Figure 4 FIG. 1 is a partial structural schematic diagram of a first battery 100 according to some embodiments of the present application from a first perspective, Figure 5 FIG. 2 is a partial structural schematic diagram of the first battery 100 according to some embodiments of the present application from a second perspective, Figure 6 FIG. 3 is a partial top view of the first battery 100 according to some embodiments of the present application.

[0081] The present application provides a battery 100, comprising: a first battery cell 110 and a second battery cell 120, the first battery cell 110 is configured with a first surface 111, and the first battery cell 110 has a first pressure relief mechanism 112 disposed on the first surface 111. The second battery cell 120 is configured with a second surface 121, and the second battery cell 120 has a second pressure relief mechanism 122 disposed on the second surface 121. The first surface 111 and the second surface 121 are oppositely arranged along a first direction 101, and the first pressure relief mechanism 112 and the second pressure relief mechanism 122 are arranged in a staggered manner along the first direction 101.

[0082] The structures of the first battery cell 110 and the second battery cell 120 can be the same or different.

[0083] The first surface 111 is an end surface of the first battery cell 110 provided with the first pressure relief mechanism 112, and the second surface 121 is an end surface of the second battery cell 120 provided with the second pressure relief mechanism 122.

[0084] The first pressure relief mechanism 112 is a structure for relieving pressure of the first battery cell 110, and the second pressure relief mechanism 122 is a structure for relieving pressure of the second battery cell 120. When the first battery cell 110 and / or the second battery cell 120 undergoes thermal runaway, the heat accumulation caused by the internal heat by-reaction of the battery cell, the rate of external heat exchange of the battery cell is less than the rate of heat accumulation, the temperature continues to rise, and the internal pressure reaches a critical value. At this time, the first pressure relief mechanism 112 and / or the second pressure relief mechanism 122 opens to relieve pressure.

[0085] Optionally, the first pressure relief mechanism 112 and / or the second pressure relief mechanism 122 is an explosion-proof valve.

[0086] The battery 100 of the present application prevents the high-temperature discharge from the pressure relief mechanism of one of the two oppositely arranged battery monomers after the thermal runaway of the one of the two oppositely arranged battery monomers, so that the high-temperature discharge does not spray to the other oppositely arranged battery monomer, thereby alleviating or eliminating the thermal spread of the whole battery after the thermal runaway of the battery monomer, and reducing the risk of safety failure of the battery 100.

[0087] Optionally, the first battery monomer 110 is configured with a third surface 113, the third surface 113 being an end surface opposite to the first surface 111, and the first battery monomer 110 has a first electrode terminal 114 arranged on the third surface 113.

[0088] Optionally, the second battery monomer 120 is configured with a fourth surface 123, the fourth surface 123 being an end surface opposite to the second surface 121, and the second battery monomer 120 has a second electrode terminal 124 arranged on the fourth surface 123.

[0089] According to some embodiments of the present application, optionally, please continue to refer to Figures 4-6 The first surface 111 and the second surface 121 are oppositely arranged along the first direction 101.

[0090] The first surface 111 and the second surface 121 are oppositely arranged along the first direction 101, so that the first battery monomer 110 and the second battery monomer 120 can be arranged in order in the battery 100 box, thereby improving the space utilization of the battery 100, and further improving the energy density of the battery 100.

[0091] Optionally, the first battery monomer 110 and the second battery monomer 120 have the same length along the second direction 102, the two end surfaces of the first battery monomer 110 along the second direction 102 and the two end surfaces of the second battery monomer 120 along the second direction 102 are aligned, and the second direction 102 is perpendicular to the first direction 101.

[0092] When the first battery monomer 110 and the second battery monomer 120 have the same length along the second direction 102, all the first battery monomers 110 and the second battery monomers 120 can be arranged in the same way, without considering the position relationship of the first pressure relief mechanism 112 of the first battery monomer 110 and the second pressure relief mechanism 122 of the second battery monomer 120 at different positions due to the different lengths of the first battery monomer 110 and the second battery monomer 120.

[0093] According to some embodiments of the present application, optionally, please refer to Figures 6-7, Figure 7 Figure 2 is a partial top view of a second battery 100 according to some embodiments of the present application. The first pressure relief mechanism 112 is located at the edge of the first surface 111, and the second pressure relief mechanism 122 is located at the middle or edge of the second surface 121.

[0094] The middle is the region around the center of the surface.

[0095] The edge is the region of the surface other than the middle.

[0096] When the first pressure relief mechanism 112 is located at the edge of the first surface 111, and the second pressure relief mechanism 122 is located at the middle or edge of the second surface 121, the first pressure relief mechanism 112 and the second pressure relief mechanism 122 can be arranged staggered along the first direction 101, so as to prevent the battery monomer after thermal runaway from spraying to the opposite battery monomer, slow down the heat spread of the whole package, and improve the safety performance of the battery 100.

[0097] As shown in Figure 2, the first pressure relief mechanism 112 is located at the edge of the first surface 111, and the second pressure relief mechanism 122 is located at the edge of the second surface 121. Figure 6 Alternatively, in the embodiment as shown in Figure 3, the structures of the first battery monomer 110 and the second battery monomer 120 can be the same, and the whole battery 100 can be designed with only one kind of battery monomer, i.e. the pressure relief mechanisms are all located at the edge of the end surface, and when arranging and installing the battery monomers, the pressure relief mechanisms of the opposite two battery monomers are arranged staggered.

[0098] Figure 6 As shown in Figure 4, the first pressure relief mechanism 112 is located at the edge of the first surface 111, and the second pressure relief mechanism 122 is located at the middle of the second surface 121.

[0099] Alternatively, in the embodiment as shown in Figure 5, the structures of the first battery monomer 110 and the second battery monomer 120 can be different, and the whole battery 100 can be designed with at least two kinds of battery monomers with different structures. Figure 7 Alternatively, in the embodiment as shown in Figure 5, the structures of the first battery monomer 110 and the second battery monomer 120 can be different, and the whole battery 100 can be designed with at least two kinds of battery monomers with different structures.

[0100] Figure 7 According to some embodiments of the present application, please continue to refer to Figure 1. The center line 103 is formed by the line connecting the center of the first surface 111 and the center of the second surface 121. Along the second direction 102, the first pressure relief mechanism 112 and the second pressure relief mechanism 122 are located on the opposite sides of the center line 103, and the second direction 102 is perpendicular to the first direction 101.

[0101] According to some embodiments of the present application, please continue to refer to Figure 1. The center line 103 is formed by the line connecting the center of the first surface 111 and the center of the second surface 121. Along the second direction 102, the first pressure relief mechanism 112 and the second pressure relief mechanism 122 are located on the opposite sides of the center line 103, and the second direction 102 is perpendicular to the first direction 101. Figure 7

[0102] ​​​The first pressure relief mechanism 112 and the second pressure relief mechanism 122 are arranged at opposite sides of the center line 103, so as to prevent the battery cell after thermal runaway from spraying to the opposite battery cell, slow down the heat spread of the whole battery pack, and improve the safety performance of the battery 100.

[0103] According to some embodiments of the present application, optionally, please refer to Figure 8 , Figure 8 is a partial top view of a third battery 100 according to some embodiments of the present application. The first surface 111 and the second surface 121 are arranged at opposite sides along the first direction 101.

[0104] The first surface 111 and the second surface 121 are arranged at opposite sides along the first direction 101, so that the first pressure relief mechanism 112 and the second pressure relief mechanism 122 can be arranged at opposite sides along the first direction 101, so as to prevent the battery cell after thermal runaway from spraying to the opposite battery cell, slow down the heat spread of the whole battery pack, and improve the safety performance of the battery.

[0105] Optionally, the first battery cell 110 and the second battery cell 120 have the same length along the third direction 104, and one end surface of the first battery cell 110 faces the middle part of the second battery cell 120 along the third direction 104, and the third direction 104 is perpendicular to the first direction 101.

[0106] When the first battery cell 110 and the second battery cell 120 have the same length along the third direction 104, all the first battery cells 110 and the second battery cells 120 can be arranged in the same way, without considering the position relationship of the first pressure relief mechanism 112 of the first battery cell 110 and the second pressure relief mechanism 122 of the second battery cell 120 at different positions due to the different lengths of the first battery cell 110 and the second battery cell 120.

[0107] According to some embodiments of the present application, optionally, please continue to refer to Figure 8 , the first pressure relief mechanism 112 and the second pressure relief mechanism 122 are respectively located at the middle part of the first surface 111 and the second surface 121 along the third direction 104, and the third direction 104 is perpendicular to the first direction 101.

[0108] As the first surface 111 and the second surface 121 are arranged in a staggered manner along the first direction 101, the first pressure relief mechanism 112 and the second pressure relief mechanism 122, which are respectively located at the middle of the first surface 111 and the second surface 121 along the third direction 104, are arranged in a staggered manner, thereby preventing the battery cell after thermal runaway from spraying to the opposite battery cell, slowing down the heat spread of the whole pack, and improving the safety performance of the battery 100. Moreover, during the installation of the battery cell, even if some incorrect installation methods occur, for example, the installation positions of the first battery cell 110 and the second battery cell 120 are incorrect, the first pressure relief mechanism 112 and the second pressure relief mechanism 122 can still be arranged in a staggered manner.

[0109] According to some embodiments of the present application, optionally, please refer to Figure 9 , Figure 9 is a partial top view of a fourth battery 100 according to some embodiments of the present application. The first battery cell 110 includes a first middle line 115 parallel to the first direction 101, and the first middle line 115 passes through the center of the first surface 111. The second battery cell 120 includes a second middle line 125 parallel to the first direction 101, and the second middle line 125 passes through the center of the second surface 121. Along the third direction 104, the first pressure relief mechanism 112 is located on the side of the first middle line 115 close to the second middle line 125, and the second pressure relief mechanism 122 is located on the side of the second middle line 125 away from the first middle line 115, and the third direction 104 is perpendicular to the first direction 101.

[0110] As the first surface 111 and the second surface 121 are arranged in a staggered manner along the first direction 101, the first pressure relief mechanism 112 located on the side of the first middle line 115 close to the second middle line 125 and the second pressure relief mechanism 122 located on the side of the second middle line 125 away from the first middle line 115 are arranged in a staggered manner, thereby preventing the battery cell after thermal runaway from spraying to the opposite battery cell, slowing down the heat spread of the whole pack, and improving the safety performance of the battery.

[0111] According to some embodiments of the present application, optionally, please refer to Figure 10 and 11 , Figure 10 is a partial structure schematic diagram of a fifth battery 100 according to some embodiments of the present application, Figure 11 is a partial top view of the fifth battery 100 according to some embodiments of the present application. The battery 100 further includes an exhaust mechanism 130, which is arranged between the first battery cell 110 and the second battery cell 120. The exhaust mechanism 130 has a first pressure relief part 131 and a second pressure relief part 132. The first pressure relief part 131 is used to receive the exhaust of the first battery cell 110 discharged through the first pressure relief mechanism 112, and the second pressure relief part 132 is used to receive the exhaust of the second battery cell 120 discharged through the second pressure relief mechanism 122.

[0112] The exhaust mechanism 130 can be a component for receiving and guiding the exhaust of the battery cell.

[0113] The first pressure relief portion 131 is a structure for pressure relief in cooperation with the first pressure relief mechanism 112.

[0114] The second pressure relief portion 132 is a structure for pressure relief in cooperation with the second pressure relief mechanism 122.

[0115] The first pressure relief portion 131 and the second pressure relief portion 132 of the exhaust mechanism 130 are both used to provide a pressure relief path for the pressure relief mechanism of the battery cell, so that the battery cell can be relieved according to the preset path.

[0116] Optionally, along the first direction 101, the projection of the first pressure relief mechanism 112 on the exhaust mechanism 130 is located in the first pressure relief portion 131, and the area of the first pressure relief portion 131 is a first pressure relief area, and the first pressure relief area / the area of the first pressure relief mechanism 112*100%≥50%.

[0117] When the first pressure relief area / the area of the first pressure relief mechanism 112*100%≥50%, it can be ensured that the preset pressure relief path of the first pressure relief mechanism remains unobstructed.

[0118] Optionally, the first pressure relief area / the area of the first pressure relief mechanism 112*100%≥70%.

[0119] Optionally, along the first direction 101, the projection of the second pressure relief mechanism 122 on the exhaust mechanism 130 is located in the second pressure relief portion 132, and the area of the second pressure relief portion 132 is a second pressure relief area, and the second pressure relief area / the area of the second pressure relief mechanism 122*100%≥50%.

[0120] When the second pressure relief area / the area of the second pressure relief mechanism 112*100%≥50%, it can be ensured that the preset pressure relief path of the second pressure relief mechanism remains unobstructed.

[0121] Optionally, the second pressure relief area / the area of the second pressure relief mechanism 122*100%≥70%.

[0122] According to some embodiments of the present application, optionally, please continue to refer to Figure 10 , the first pressure relief portion 131 and the second pressure relief portion 132 are arranged in a staggered manner along the first direction 101.

[0123] When the first pressure relief portion 131 and the second pressure relief portion 132 are arranged in a staggered manner along the first direction 101, it can prevent the battery cell after thermal runaway from spraying to the opposite battery cell, slow down the heat spread of the whole pack, and improve the safety performance of the battery 100.

[0124] According to some embodiments of the present application, optionally, please refer to Figure 12 , Figure 12Figure 6 is a partial top view of a sixth battery 100 according to some embodiments of the present application. The venting mechanism 130 further comprises a blocking member 133, the first pressure relief portion 131 and the second pressure relief portion 132 are arranged in a first direction 101 opposite to each other, and the blocking member 133 is disposed between the first pressure relief portion 131 and the second pressure relief portion 132.

[0125] The blocking member 133 is a structure for blocking the high-temperature emissions of the battery cell that has thermal runaway from reaching the opposite battery cell.

[0126] The blocking member 133 can block the high-temperature emissions of the battery cell that has thermal runaway from spraying to the opposite battery cell, thereby alleviating or eliminating the thermal spread of the entire battery after the battery cell has thermal runaway, and reducing the risk of safety failure of the battery.

[0127] According to some embodiments of the present application, optionally, the first pressure relief portion 131 is configured as at least one of a through hole and a weak structure, and / or the second pressure relief portion 132 is configured as at least one of a through hole and a weak structure.

[0128] For example, the first pressure relief portion 131 and the second pressure relief portion 132 are both configured as through holes; or the first pressure relief portion 131 and the second pressure relief portion 132 are both configured as weak structures; or the first pressure relief portion 131 is configured as a through hole and the second pressure relief portion 132 is configured as a weak structure.

[0129] When the first pressure relief portion 131 and / or the second pressure relief portion 132 is a through hole, the emissions of the battery cell can be relieved through the through hole; when the first pressure relief portion 131 and / or the second pressure relief portion 132 is a weak structure, the emissions of the battery cell can break through the weak structure when a preset pressure is generated.

[0130] According to some embodiments of the present application, optionally, a flow channel (not shown in the figure) is integrated in the venting mechanism 130, and the flow channel is used to accommodate a heat exchange medium.

[0131] The heat exchange medium can absorb the heat of the high-temperature emissions of the battery cell that has thermal runaway, reduce the temperature of the entire battery 100, and improve the safety of the battery 100.

[0132] It should be noted that the flow channel is not in communication with the first pressure relief portion 131 and the second pressure relief portion 132, so as to prevent the heat exchange medium in the flow channel from overflowing from the first pressure relief portion 131 and the second pressure relief portion 132.

[0133] According to some embodiments of the present application, optionally, please continue to refer to Figure 10 The venting mechanism 130 further comprises a heat exchange portion 134, and the flow channel is disposed in the heat exchange portion 134.

[0134] The heat exchange portion 134 is provided with a flow channel inside the exhaust mechanism 130.

[0135] The heat exchange portion 134 is used for heat exchange with high-temperature exhaust of the battery cell in thermal runaway, so as to reduce the temperature of the whole battery 100 and improve the safety of the battery 100.

[0136] According to some embodiments of the present application, the exhaust mechanism 130 has a liquid inlet (not shown in the figure) and a liquid outlet (not shown in the figure) at two ends thereof, respectively, which are in communication with the flow channel.

[0137] The heat exchange medium in the flow channel is a flowing heat exchange medium, which can better balance the temperature in the whole battery 100.

[0138] According to some embodiments of the present application, please refer to Figure 13 , Figure 13 is a top view of the first battery 100 according to some embodiments of the present application. The battery 100 comprises a plurality of first battery cell groups and a plurality of second battery cell groups extending along a fourth direction 105, the fourth direction 105 being perpendicular to the first direction 101, the first battery cell groups comprising a plurality of first battery cells 110, the second battery cell groups comprising a plurality of second battery cells 120, and the first battery cell groups and the second battery cell groups being alternately distributed along the first direction 101.

[0139] The plurality of battery cells of the battery 100 are arranged in an orderly manner, which can ensure the structural strength of the whole battery 100 and improve the energy density of the battery 100.

[0140] According to some embodiments of the present application, please refer to Figure 14 and 15 , Figure 14 is a top view of the fifth battery 100 according to some embodiments of the present application, Figure 15 is a structural schematic view of the fifth battery 100 according to some embodiments of the present application. The battery 100 further comprises an exhaust mechanism 130, the exhaust mechanism 130 being arranged between the first battery cell group and at least one second battery cell group adjacent to the first battery cell group, and the exhaust mechanism 130 having a first pressure relief portion 131 and a second pressure relief portion 132 corresponding to the first pressure relief mechanism 112 and the second pressure relief mechanism 122, respectively.

[0141] The first pressure relief portion 131 and the second pressure relief portion 132 are both used for providing a pressure relief path for the pressure relief mechanism of the battery cell, so that the battery cell can be relieved according to a preset path.

[0142] According to some embodiments of the present application, please continue to refer to Figure 15 , the first battery cell group and the second battery cell group are distributed in multiple layers in the height direction of the battery 100.

[0143] The plurality of battery cells in the battery 100 are arranged in multiple layers in order, which can improve space utilization and thus improve the energy density of the battery 100.

[0144] According to some embodiments of the present application, referring to 7, 10-11 and 14-15, the battery 100 comprises an exhaust mechanism 130, and a plurality of first battery cell groups and a plurality of second battery cell groups extending along a fourth direction 105 perpendicular to the first direction 101. The first battery cell groups comprise a plurality of first battery cells 110, the second battery cell groups comprise a plurality of second battery cells 120, and the plurality of first battery cell groups and the plurality of second battery cell groups are alternately distributed along the first direction 101. The first battery cell groups and the second battery cell groups are distributed in multiple layers in the height direction of the battery 100, and the first battery cells 110 and the second battery cells 120 have the same structure. The first battery cells 110 are provided with a first surface 111, and the first battery cells 110 have a first pressure relief mechanism 112 arranged on the first surface 111. The second battery cells 120 are provided with a second surface 121, and the second battery cells 120 have a second pressure relief mechanism 122 arranged on the second surface 121. The first surface 111 and the second surface 121 are arranged opposite to each other along the first direction 101, the first pressure relief mechanism 112 is located at the edge of the first surface 111, the second pressure relief mechanism 122 is located at the edge of the second surface 121, and the center line 103 formed by the center of the first surface 111 and the center of the second surface 121 is along the second direction 102 perpendicular to the first direction 101. The first pressure relief mechanism 112 and the second pressure relief mechanism 122 are located on the opposite sides of the center line 103. The exhaust mechanism 130 is arranged between the first battery cell group and one of the second battery cell groups adjacent thereto. The exhaust mechanism 130 has a heat exchange part 134, and a first pressure relief part 131 and a second pressure relief part 132 corresponding to the first pressure relief mechanism 112 and the second pressure relief mechanism 122 respectively. The first pressure relief part 131 is used to receive the exhaust of the first battery cell 110 via the first pressure relief mechanism 112, and the second pressure relief part 132 is used to receive the exhaust of the second battery cell 120 via the second pressure relief mechanism 122. The first pressure relief part 131 and the second pressure relief part 132 are arranged in a staggered manner along the first direction 101. The first pressure relief part 131 and the second pressure relief part 132 are both configured as through holes. The exhaust mechanism 130 is integrated with a flow channel arranged in the heat exchange part 134, the flow channel is used to accommodate a heat exchange medium, and the exhaust mechanism 130 has a liquid inlet (not shown) and a liquid outlet (not shown) at two ends thereof, respectively, and the liquid inlet and the liquid outlet are in communication with the flow channel, respectively.

[0145] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized by, The battery comprises: a first battery cell configured with a first surface, the first battery cell having a first pressure relief mechanism disposed on the first surface; a second battery cell configured with a second surface, the second battery cell having a second pressure relief mechanism disposed on the second surface; the first surface and the second surface are oppositely arranged along a first direction, and the first pressure relief mechanism and the second pressure relief mechanism are misaligned along the first direction; when the first surface and the second surface are oppositely arranged along the first direction, a line connecting the center of the first surface and the center of the second surface forms a center line, and along a second direction, the first pressure relief mechanism and the second pressure relief mechanism are located on the opposite sides of the center line, the second direction being perpendicular to the first direction; when the first surface and the second surface are misaligned along the first direction, the first battery cell includes a first center line parallel to the first direction, the first center line passing through the center of the first surface, and the second battery cell includes a second center line parallel to the first direction, the second center line passing through the center of the second surface; along a third direction, the first pressure relief mechanism is located on the side of the first center line close to the second center line, and the second pressure relief mechanism is located on the side of the second center line away from the first center line, the third direction being perpendicular to the first direction.

2. The battery of claim 1, wherein, The first pressure relief mechanism is located at the edge of the first surface, and the second pressure relief mechanism is located at the middle or edge of the second surface.

3. The battery of claim 1, wherein, The first pressure relief mechanism and the second pressure relief mechanism are respectively located at the middle of the first surface and the second surface along a third direction, the third direction being perpendicular to the first direction.

4. The battery according to any one of claims 1 to 3, characterized in that The battery further comprises an exhaust mechanism disposed between the first battery cell and the second battery cell, the exhaust mechanism having a first pressure relief part for receiving the exhaust of the first battery cell via the first pressure relief mechanism and a second pressure relief part for receiving the exhaust of the second battery cell via the second pressure relief mechanism.

5. The battery of claim 4, wherein, The first pressure relief part and the second pressure relief part are misaligned along the first direction.

6. The battery of claim 4, wherein, The exhaust mechanism further comprises a blocking piece, the first pressure relief part and the second pressure relief part are oppositely arranged along the first direction, and the blocking piece is disposed between the first pressure relief part and the second pressure relief part.

7. The battery of claim 4, wherein, The first pressure relief part is configured as at least one of a through hole and a weak structure, and / or the second pressure relief part is configured as at least one of a through hole and a weak structure.

8. The battery of claim 4, wherein, The exhaust mechanism is integrated with a flow channel for accommodating a heat exchange medium.

9. The battery of claim 8, wherein, The exhaust mechanism further comprises a heat exchange part, and the flow channel is disposed in the heat exchange part.

10. The battery of claim 9, wherein, The exhaust mechanism has a liquid inlet and a liquid outlet at two ends respectively, and the liquid inlet and the liquid outlet are in communication with the flow channel respectively.

11. The battery according to any one of claims 1 to 3, characterized by The battery includes a plurality of first battery cell groups and a plurality of second battery cell groups extending in a fourth direction perpendicular to the first direction, the first battery cell groups including a plurality of the first battery cells, the second battery cell groups including a plurality of the second battery cells, and the plurality of the first battery cell groups and the plurality of the second battery cell groups being alternately distributed in the first direction.

12. The battery of claim 11, wherein, The battery further includes an exhaust mechanism provided between the first battery cell group and at least one of the second battery cell groups adjacent thereto, the exhaust mechanism having a first pressure relief portion and a second pressure relief portion corresponding to the first pressure relief mechanism and the second pressure relief mechanism, respectively.

13. The battery of claim 11, wherein, The first battery cell groups and the second battery cell groups are distributed in multiple layers in a height direction of the battery.

14. An electrical device, comprising: The electric device includes the battery according to any one of claims 1 to 13, the battery being used to provide electric energy.

Images