Battery and electric equipment

Abstract

A battery (100) and electric equipment, the battery (100) comprises a plurality of battery cells (20) and at least one insulating sheet (26), each battery cell (20) comprises a housing (21), the housing (21) is provided with a first wall (212), and each insulating sheet (26) is adhered to the outer surface of the first wall (212) of the plurality of battery cells (20).

Description

Battery and power consuming device TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery and a power consuming device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] Batteries are widely used in portable electronic devices, electric vehicles, power tools, unmanned aerial vehicles, energy storage devices and other fields. How to improve the production efficiency of batteries is a technical problem that needs to be solved in battery technology.

[0004] SUMMARY

[0005] The present application provides a battery and a power consuming device, which can improve the production efficiency of the battery.

[0006] The present application is achieved by the following technical solutions:

[0007] In a first aspect, the present application provides a battery, comprising a plurality of battery monomers and at least one insulating sheet, wherein the battery monomer comprises a shell, and the shell has a first wall; and each insulating sheet is bonded to the outer surface of the first wall of the plurality of battery monomers.

[0008] According to the battery of the present application, each insulating sheet is bonded to the outer surface of the plurality of first battery monomers, so that only one process is needed to bond one insulating sheet to the outer surface of the first wall of the plurality of battery monomers. In the production process of the battery, a large number of processes are saved, thereby greatly improving the production efficiency of the battery.

[0009] According to some embodiments of the present application, the insulating sheet is a one-piece structure.

[0010] In the above scheme, the production efficiency of the insulating sheet can be improved.

[0011] According to some embodiments of the present application, the insulating sheet comprises a body portion and a buffer portion, the body portion is a plurality of body portions, the plurality of body portions are arranged along a first direction, and the buffer portion is connected between adjacent two body portions, and each body portion is bonded to at least one battery monomer.

[0012] In the above scheme, the two adjacent body parts are connected by the buffer part, which can absorb part of the energy when the two adjacent body parts move relatively. Since each body part is bonded with at least one battery cell, the buffer part can absorb part of the energy when the relative displacement occurs between the battery cells bonded by the two adjacent body parts in the first direction, thereby slowing down the phenomenon of mutual extrusion between the two adjacent battery cells or even damaging the battery cells.

[0013] According to some embodiments of the present application, the shell has a second wall perpendicular to the first direction, and the second wall is the largest wall of the shell.

[0014] In the above scheme, part (at least two) of the plurality of battery cells bonded by the two adjacent body parts can be arranged in the first direction, and the first direction is the thickness direction of the battery cell. When the battery cell expands due to normal use or thermal runaway, the expansion direction is mainly the thickness direction (i.e., the first direction) of the battery cell. The buffer part is arranged between the two adjacent body parts in the first direction, and the buffer part can play a buffering role to slow down the phenomenon of mutual extrusion between the two adjacent battery cells in the first direction or even damaging the battery cells.

[0015] According to some embodiments of the present application, each body part is bonded with a plurality of battery cells, and the plurality of battery cells bonded with the same body part are arranged in a second direction, and the first direction and the second direction are perpendicular.

[0016] In the above scheme, the plurality of battery cells bonded with the same first wall are arranged in the second direction, and the facets of the plurality of battery cells can be arranged relatively in the second direction.

[0017] The plurality of battery cells bonded with the same body part can be referred to as a first battery cell group, and the plurality of body parts are arranged in the first direction, so the plurality of first battery cell groups can be arranged in the first direction. Therefore, the plurality of battery cells in the battery can form a multi-row and multi-column arrangement structure.

[0018] According to some embodiments of the present application, along the first direction, the first gap is arranged between the two adjacent battery cells; along a third direction, the projection of the buffer part at least partially overlaps the first gap, the third direction is parallel to the thickness direction of the first wall, and the third direction is perpendicular to the first direction.

[0019] In the above scheme, when the two adjacent battery cells expand, the size of the first gap between the two adjacent battery cells in the first direction decreases, and the buffer part can be compressed, so that the body part can move with the first wall bonded to the battery cell.

[0020] According to some embodiments of the present application, the body part is a flat plate structure, and the buffer part is a bent structure.

[0021] In the above solution, the bent part can include a protruding part protruding on one side or the other side along the third direction. The protruding part can be one or more, and the orientations of the multiple protruding parts can be different.

[0022] According to some embodiments of the present application, along the first direction, the size of the buffer part after being straightened is L; along the first direction, the distance between two adjacent body parts is L1, and the size of the battery monomer is T, satisfying: (L-L1) = (1%-8%)T.

[0023] In the above solution, on the one hand, the buffer part has sufficient buffering capacity (stretching or shrinking capacity) to adapt to the expansion amount of the battery monomer, and on the other hand, the buffer part will not cause the processing difficulty of the buffer part to become larger or the processing cost to increase due to excessive buffering capacity.

[0024] According to some embodiments of the present application, the shell includes a shell body and an end cover, the shell body has an opening, the end cover is connected with the shell body to seal the opening, and the first wall is the end cover.

[0025] According to some embodiments of the present application, the battery further includes an insulating film, the insulating film covers the outer surface of the shell body, one end of the insulating film close to the end cover is formed into a flange part, and the flange part is arranged between the insulating sheet and the end cover.

[0026] In the above solution, the insulating sheet compresses a part of the insulating film on the outer surface of the end cover, so that the insulating sheet and the insulating film can cover the outer surface of the shell and insulate the shell.

[0027] According to some embodiments of the present application, the insulating sheet is provided with a sampling wire harness.

[0028] In the above solution, the insulating sheet can have the function of a wire harness isolation plate, and even in the embodiments of the present application, the wire harness isolation plate can be cancelled.

[0029] According to some embodiments of the present application, the first wall is provided with an electrode terminal, and the insulating sheet is provided with a first hole avoiding the electrode terminal.

[0030] In the above solution, the electrode terminal can pass through the first hole, so as to facilitate electrical connection with the busbar.

[0031] According to some embodiments of the present application, the first wall is provided with a pressure relief mechanism, the insulating sheet is provided with a second hole, and along the thickness direction of the first wall, the second hole is arranged opposite to the pressure relief mechanism.

[0032] In the above scheme, after the internal pressure of the battery cell reaches the preset value, the gas discharged from the pressure relief mechanism is not blocked by the insulating sheet, so that the high-pressure gas in the battery cell can be quickly discharged.

[0033] In a second aspect, the embodiments of the present application provide a power-using device, comprising the battery described above. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0035] FIG. 1 is a schematic diagram of a vehicle according to an embodiment of the present application;

[0036] FIG. 2 is an exploded view of a battery according to an embodiment of the present application;

[0037] FIG. 3 is an exploded view of a battery cell according to an embodiment of the present application;

[0038] FIG. 4 is a schematic diagram of a battery according to another embodiment of the present application;

[0039] FIG. 5 is a top view of a battery according to another embodiment of the present application;

[0040] FIG. 6 is a sectional view of FIG. 5 along the direction of A-A;

[0041] FIG. 7 is a partial enlarged view of B shown in FIG. 6.

[0042] FIG. 1 is a schematic diagram of a vehicle according to an embodiment of the present application; DETAILED DESCRIPTION

[0043] The embodiments of the present application will be further described in detail below in conjunction with the drawings and examples. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0044] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments 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. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0046] In the present application, the phrase "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiments, nor are they necessarily mutually exclusive or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0049] In the present application, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0050] In some embodiments, the battery can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0051] In some embodiments, the battery can be a battery pack, and the battery pack includes a box body and battery cells, and the battery cells or the battery module are accommodated in the box body.

[0052] In some embodiments, the box body can be part of the chassis structure of the vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0053] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0054] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0055] The battery cell can be, but is not limited to, a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc.

[0056] In some embodiments, the battery cell can include a shell. The shell is used to encapsulate components such as the electrode assembly and the electrolyte. The shell 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.

[0057] In some embodiments, the shell includes an end cap and a shell body, and the shell body is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly and the electrolyte. The shell body can be provided with one or more openings. The end cap can also be provided with one or more openings.

[0058] In some embodiments, at least one electrode terminal is provided on the shell, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab, or indirectly connected to the tab through an adapter. The electrode terminal can be provided on the end cap or on the shell body.

[0059] In some embodiments, a pressure relief mechanism is provided on the shell. The pressure relief mechanism is used to release the internal pressure of the battery cell.

[0060] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes of battery cells, and the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal battery cell, etc. The embodiments of the present application are not particularly limited.

[0061] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0062] In some embodiments, the battery can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0063] In some embodiments, the battery can be a battery pack, and the battery pack includes a box body and battery cells, and the battery cells or battery modules are accommodated in the box body.

[0064] In some embodiments, the box body can be part of the chassis structure of the vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and longitudinal beam of the vehicle.

[0065] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0066] The battery has the outstanding advantages of high energy density, small environmental pollution, large power density, long service life, wide adaptation range, and small self-discharge coefficient, and is an important part of the development of new energy today.

[0067] The development of battery technology needs to consider many design factors, such as performance parameters such as energy density, discharge capacity, and charge / discharge rate, and in addition, the assembly efficiency of the battery also needs to be considered.

[0068] The battery cell disclosed in the embodiments of the present application can be used in, but is not limited to, an electric device such as a vehicle, a ship, or an aircraft. A power supply system of the electric device can be composed of the battery cell and the battery disclosed in the present application.

[0069] The embodiments of the present application provide an electric device using a battery cell as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric vehicle, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0070] The following embodiments take a vehicle 1000 as an example for convenience of description.

[0071] Please refer to FIG. 1, which is a schematic diagram of a vehicle according to an embodiment 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 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, for example, for power supply of the circuit system of the vehicle 1000, for example, for power supply of the vehicle 1000 during starting, navigation and running.

[0072] 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, for power supply of the vehicle 1000 during starting, navigation and running.

[0073] 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.

[0074] Please refer to FIG. 2, which is an exploded view of the battery according to an embodiment of the present application. The battery 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is accommodated in the box body 10. The box body 10 is used to provide an accommodation space for the battery cell 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first sub-box body 11 and a second sub-box body 12, and the first sub-box body 11 and the second sub-box body 12 are overlapped with each other, and the first sub-box body 11 and the second sub-box body 12 together define an accommodation space for accommodating the battery cell 20. The second sub-box body 12 can be a hollow structure with one end open, and the first sub-box body 11 can be a plate structure, and the first sub-box body 11 is overlapped with the open side of the second sub-box body 12, so that the first sub-box body 11 and the second sub-box body 12 together define the accommodation space; the first sub-box body 11 and the second sub-box body 12 can also be hollow structures with one side open, and the open side of the first sub-box body 11 is overlapped with the open side of the second sub-box body 12.

[0075] In the battery 100, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection, where the mixed connection 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 connection, and the whole of the multiple battery cells 20 is accommodated in the case 10. Of course, the battery 100 can also be in the form of multiple battery modules, where the multiple battery cells 20 are connected in series, in parallel, or in a mixed connection to form the battery modules, and the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and the whole is accommodated in the case 10. The battery 100 can also include other structures, for example, the battery 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 20.

[0076] The battery cell 20 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.

[0077] Referring to FIG. 3, FIG. 3 is an exploded view of the battery cell according to some embodiments of the present application. As shown in FIG. 3, the battery cell 20 includes a housing 21, an electrode assembly 22, and an electrode terminal 25. The housing 21 includes a case 211 and an end cap (i.e., a first wall 212), and the case 211 has an opening, and the end cap closes the opening to isolate the internal environment of the battery cell 20 from the external environment.

[0078] The case 211 is a component for cooperating with the end cap to form the internal environment of the battery cell 20, and the formed internal environment can be used to accommodate the electrode assembly 22, the electrolyte, and other components. The case 211 and the end cap can be independent components. The case 211 can be of various shapes and sizes. Specifically, the shape of the case 211 can be determined according to the specific shape and size of the electrode assembly 22. The material of the case 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0079] The end cover is a component that covers the opening of the shell 211 to isolate the internal environment of the battery monomer 20 from the external environment. Without limitation, the shape of the end cover can be adapted to the shape of the shell 211 to fit the shell 211. Optionally, the end cover can be made of a material with certain hardness and strength, such as an aluminum alloy, so that the end cover is less likely to deform when subjected to extrusion and impact, allowing the battery monomer 20 to have higher structural strength and reliability. The end cover can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect with the electrode assembly 22 for outputting or inputting the electrical energy of the battery monomer 20. The material of the end cover can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations. In some embodiments, an insulating structure can also be provided on the inner side of the end cover, which can be used to isolate the electrical connection components in the shell 211 from the end cover to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc.

[0080] The electrode assembly 22 is a component in which an electrochemical reaction occurs in the battery monomer 20. One or more electrode assemblies 22 can be contained in the shell 211. The electrode assembly 22 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and generally has a separator film between the positive electrode sheet and the negative electrode sheet, which is used to separate the positive electrode sheet and the negative electrode sheet to avoid internal short circuit of the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting the main body of the electrode assembly, and a portion of the positive electrode sheet and the negative electrode sheet without active material each constitutes a tab. The positive tab and the negative tab can be located together at one end of the main body or at two ends of the main body, respectively. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

[0081] In the related art, the battery monomer includes a shell, which generally includes a shell and an end cover. In order to insulate the end cover from external busbars or other electrical components, a top patch is usually attached to the outer surface of the end cover.

[0082] The battery can include a plurality of battery monomers, and the outer surface of the end cover of each battery monomer is attached with a top patch. Therefore, the step of attaching the top patch to the outer surface of the end cover of each battery monomer is indispensable in the production process of the battery, thereby increasing the processing steps of the battery, affecting the production rhythm of the battery, and reducing the production efficiency of the battery.

[0083] Therefore, the present application provides a battery and a use device, and the production efficiency of the battery can be improved.

[0084] The battery 100 according to the embodiments of the present application can include a plurality of battery monomers 20 and at least one insulating sheet 26.

[0085] As shown in FIGS. 4 and 5, the plurality of battery cells 20 can be arranged in a certain direction, thereby forming a battery cell group.

[0086] The plurality of battery cells 20 can be stacked together, for example, the battery cell 20 is in a flat structure, and the plurality of battery cells 20 can be stacked in the thickness direction of the battery cell 20.

[0087] The plurality of battery cells 20 can be bound together by a binding member such as a cable tie, that is, a battery cell group.

[0088] The battery cell 20 can include a housing 21, which can define an accommodation space, and an electrode assembly and an electrolyte can be encapsulated in the accommodation space defined by the housing 21.

[0089] The housing 211 can be a metal shell, a plastic shell, or a composite metal shell, etc.

[0090] The housing 21 can have a first wall 212, and it should be noted that the first wall 212 can be any wall of the housing 21, for example, the first wall 212 can be a top wall or a bottom wall of the housing 21, and of course the first wall 212 can also be a peripheral wall of the housing 21 or any wall of the peripheral wall.

[0091] In some embodiments, the housing 21 can include an end cap and a housing 211, and the housing 211 is provided with an opening, and the end cap is fixedly connected with the housing 211 and is used to close the opening. Thus, the end cap and the housing 211 form a sealed space for accommodating the electrode assembly and the electrolyte, etc.

[0092] The housing 211 can be provided with one or more openings, and correspondingly, the end cap can also be one or more.

[0093] The first wall 212 in the embodiment of the application can be the end cap described above. Of course, the first wall 212 can also be a wall of the housing 211, for example, it can be a wall of the housing 211 opposite to the end cap.

[0094] The insulating sheet 26 can be bonded to the outer surface of the first wall 212 of the battery cell 20, thereby insulating and isolating the first wall 212 from external devices.

[0095] Each insulating sheet 26 is bonded to the outer surface of the first wall 212 of the plurality of battery cells 20.

[0096] That is, unlike the prior art in which one insulating sheet is bonded to the outer surface of the first wall of one battery cell, in the embodiment of the application, one insulating sheet 26 is bonded to the outer surface of the first wall 212 of the plurality of battery cells 20.

[0097] Therefore, the step of bonding the insulating sheet 26 to the outer surface of the first wall 212 of each battery cell 20 does not need to be repeatedly performed, and in the embodiment of the present application, only one process is needed to bond one insulating sheet 26 to the outer surface of the first wall 212 of the plurality of battery cells 20. A large number of processes are saved in the production process of the battery, thereby greatly improving the production efficiency of the battery.

[0098] It can be understood that the insulating sheet 26 described above can be a one-piece component, and of course can be a plurality of components connected together to form, as long as the insulating sheet 26 is an integral structure when bonded to the outer surface of the first wall 212 of the plurality of battery cells 20.

[0099] According to the battery of the embodiment of the present application, each insulating sheet 26 is bonded to the outer surface of the plurality of first battery cells 20, and therefore only one process is needed to bond one insulating sheet 26 to the outer surface of the first wall 212 of the plurality of battery cells 20. A large number of processes are saved in the production process of the battery, thereby greatly improving the production efficiency of the battery.

[0100] In some embodiments of the present application, the insulating sheet 26 is a one-piece structure.

[0101] The insulating sheet 26 can be injection molded, and the insulating sheet 26 can be made of plastic or rubber or other insulating materials, which are not limited in the present application.

[0102] The insulating sheet 26 in the present application is a one-piece structure, and therefore the production efficiency of the insulating sheet 26 can be improved.

[0103] In some embodiments of the present application, as shown in FIGS. 4-7, the insulating sheet 26 includes a body portion 261 and a buffer portion 262.

[0104] The body portion 261 can be configured as a plate structure, and the body portion 261 is a plurality of body portions 261 arranged along the first direction X, and each body portion 261 is bonded to at least one battery cell 20.

[0105] For example, one body portion 261 can be bonded only to the outer surface of the first wall 212 of one battery cell 20; or one body portion 261 can be bonded to the outer surface of the first wall 212 of a plurality of battery cells 20, and the plurality of battery cells 20 bonded by the same body portion 261 can be arranged in the first direction X, or can be arranged in a direction intersecting the first direction X. The arrangement direction of the plurality of battery cells 20 can be the same as the thickness direction of the battery cell 20, or the arrangement direction of the plurality of battery cells 20 can be perpendicular to the thickness direction of the battery cell 20, which is not limited in the present application.

[0106] The two adjacent body parts 261 are connected by the buffer part 262, which can absorb part of the energy when the two adjacent body parts 261 move relatively. Since each body part 261 is bonded with at least one battery cell 20, when the relative displacement occurs between the plurality of battery cells 20 bonded by the two adjacent body parts 261 in the first direction X, the buffer part 262 can absorb part of the energy, slow down the mutual extrusion between the two adjacent battery cells 20, and even prevent the damage of the battery cell 20.

[0107] The buffer part 262 can have the effect of buffering and absorbing energy due to its structure, or can have the effect of buffering and absorbing energy due to its material.

[0108] In some embodiments of the present application, as shown in FIGS. 4-5, the shell 21 has a second wall 211a perpendicular to the first direction X, and the second wall 211a is the largest wall of the shell 21.

[0109] The shell 21 can have a flat structure, and the two side walls of the shell 21 in the thickness direction have the largest area, i.e., the second wall 211a is the two side walls of the shell 21 in the thickness direction, and the first direction X is the thickness direction of the shell 21.

[0110] Part (at least two) of the plurality of battery cells 20 bonded by the two adjacent body parts 261 can be arranged in the first direction X, and the first direction X is the thickness direction of the battery cell 20. When the battery cell 20 expands due to normal use or thermal runaway, the expansion direction is mainly the thickness direction (i.e., the first direction X) of the battery cell 20. The buffer part 262 is arranged between the two adjacent body parts 261 in the first direction X, and the buffer part 262 can play a buffering role to slow down the mutual extrusion between the two adjacent battery cells 20 in the first direction X, and even prevent the damage of the battery cell 20.

[0111] According to some embodiments of the present application, each body part 261 is bonded with a plurality of battery cells 20, and the plurality of battery cells 20 bonded with the same body part 261 are arranged in the second direction Y, and the first direction X and the second direction Y are perpendicular.

[0112] That is, in the first direction X, the size of the body part 261 can satisfy the bonding of the first wall 212 of one battery cell 20, and in the second direction Y, the size of the body part 261 can satisfy the bonding of the first wall 212 of a plurality of battery cells 20.

[0113] The plurality of battery cells 20 bonded with the same first wall 212 are arranged in the second direction Y, and the facets of the plurality of battery cells 20 can be arranged relatively in the second direction Y.

[0114] The plurality of battery cells 20 bonded with the same body part 261 can be referred to as a first battery cell group, and the plurality of body parts 261 are arranged in the first direction X, so the plurality of first battery cell groups can be arranged in the first direction X. Thus, the plurality of battery cells 20 in the battery can form a multi-row and multi-column arrangement structure.

[0115] In some embodiments of the present application, as shown in FIG. 7, along the first direction X, there is a first gap 105 between two adjacent battery cells 20. That is, the two adjacent battery cells 20 are not tightly fitted, so that when the battery cell 20 is normally used or expands due to thermal runaway, there is space for the battery cell 20 to expand between the two adjacent battery cells 20.

[0116] Along the third direction Z, the projection of the buffer part 262 at least partially overlaps the first gap 105, the third direction Z is parallel to the thickness direction of the first wall 212, and the third direction Z is perpendicular to the first direction X.

[0117] Thus, when the two adjacent battery cells 20 expand, the size of the first gap 105 between the two adjacent battery cells 20 in the first direction X decreases, the buffer part 262 can be compressed, and thus the body part 261 can move with the first wall 212 bonded to the battery cell 20.

[0118] According to some embodiments of the present application, as shown in FIG. 7, the body part 261 is a flat plate structure, and the buffer part 262 is a bent structure.

[0119] It can be understood that the bent part can include a protruding part protruding on one side or the other side along the third direction Z. The protruding part can be one or more, and the orientations of the plurality of protruding parts can be different.

[0120] In some embodiments of the present application, the buffer part 262 can include a first buffer unit 262a, and the first buffer unit 262a protrudes toward one side of the third direction Z relative to the body part 261.

[0121] For example, when the first wall 212 is the top wall of the battery cell 20, the third direction Z is the up-down direction, and the first buffer unit 262a can protrude upward.

[0122] The buffer part 262 can also include a second buffer unit 262b, and the second buffer unit 262b protrudes toward the other side of the third direction Z relative to the body part 261.

[0123] For example, when the first wall 212 is the top wall of the battery cell 20, the third direction Z is the up-down direction, and the second buffer unit 262b can protrude downward.

[0124] It can be understood that the first buffering unit 262a and the second buffering unit 262b can be formed by bending the same plate part, and the thickness of the first buffering unit 262a and the thickness of the second buffering unit 262b can be the same.

[0125] The first buffering unit 262a and / or the second buffering unit 262b are multiple, and the first buffering unit 262a and the second buffering unit 262b are arranged alternately along the first direction X.

[0126] In some embodiments of the present application, the size of the buffering part 262 after being straightened along the first direction X is L. That is, the buffering part 262 is no longer a bent structure protruding from the body part 261 after being straightened, but is a plate structure like the body part 261, at which time the buffering part 262 is no longer elongated in the first direction X.

[0127] The distance between the adjacent two body parts 261 along the first direction X is L1, and the size of the battery monomer 20 is T, which satisfies: (L-L1) = (1%-8%)T.

[0128] It should be noted that the distance L1 between the adjacent two body parts 261 is the distance between the adjacent two body parts 261 when the multiple battery monomers 20 do not swell, and the size T of the battery monomer 20 is the size in the first direction X when the battery does not swell.

[0129] The difference between (L-L1) represents the buffering capacity of the buffering part 262, which is positively correlated with the initial size of the battery monomer 20 in the first direction X.

[0130] The larger the initial size of the battery monomer 20 in the first direction X, the larger the size of the battery monomer 20 when swelling in normal use or thermal runaway, so the buffering part 262 needs to have a larger buffering capacity; the smaller the initial size of the battery monomer 20 in the first direction X, the smaller the size of the battery monomer 20 when swelling in normal use or thermal runaway, so the buffering capacity of the buffering part 262 can be appropriately reduced.

[0131] (L-L1) can be 1% T, 1.5% T, 2% T, 2.5% T, 3% T, 3.5% T, 4% T, 4.5% T, 5% T, 5.5% T, 6% T, 6.5% T, 7% T, 7.5% T, 8% T.

[0132] The specific value of (L-L1) above is only some specific examples of the present application, and any (L-L1) difference falling within the above range is within the protection scope of the present application.

[0133] Since the (L-L1) of the present application satisfies the above range, on the one hand, the buffer part 262 has sufficient buffering capacity (stretching or shrinking capacity) to accommodate the expansion amount of the battery cell 20, and on the other hand, the buffer part 262 will not cause the processing difficulty of the buffer part 262 to become larger or the processing cost to increase due to excessive buffering capacity.

[0134] In some embodiments of the present application, the shell 21 can include an end cover and a shell body 211, and the shell body 211 has an opening, and the end cover is connected with the shell body 211 to seal the opening. In this way, the end cover and the shell body 211 form a sealed space for accommodating the electrode assembly and the electrolyte and other substances.

[0135] The shell body 211 can be provided with one or more openings, and correspondingly, the end cover can also be one or more.

[0136] The first wall 212 in the embodiments of the present application can be the end cover described above.

[0137] Of course, the first wall 212 can also be a wall part of the shell body 211, for example, it can be a wall part of the shell body 211 opposite to the end cover.

[0138] In some embodiments, the end cover can be located at the top of the battery cell 20, and thus the end cover can be a top cover sheet of the battery cell 20.

[0139] The battery cell 20 can include an electrode terminal 25, and the electrode terminal 25 can be mounted to the end cover.

[0140] According to some embodiments of the present application, the battery further includes an insulating film (not shown), and the insulating film covers the outer surface of the shell body 211, and the insulating film can insulate and isolate the shell body 211 from the devices outside.

[0141] The end of the insulating film close to the end cover is formed into a flange part, and the flange part is arranged between the insulating sheet 26 and the end cover. In this way, the insulating sheet 26 presses a part of the insulating film on the outer surface of the end cover, so that the insulating sheet 26 and the insulating film can cover the outer surface of the shell 21, and insulate and isolate the shell 21.

[0142] In some embodiments of the present application, the insulating sheet 26 is provided with a sampling wire harness. That is, the insulating sheet 26 can have the function of a wire harness isolation plate, and even in the embodiments of the present application, the wire harness isolation plate can be cancelled.

[0143] The insulating sheet 26 can be used for the installation and fixation of the sampling wire harness, and of course, it can also be used for the installation and positioning of the busbar.

[0144] In some embodiments of the present application, the electrode terminal 25 is arranged on the first wall 212, and the first hole 101 for avoiding the electrode terminal 25 is arranged on the insulating sheet 26.

[0145] The electrode terminal 25 can be electrically connected with the electrode assembly inside the shell 21 through an adapter, and the electrode terminal 25 can pass through the first wall 212.

[0146] The insulating sheet 26 is provided with a first hole 101, so that the electrode terminal 25 can pass through the first hole 101 to facilitate electrical connection with the busbar.

[0147] According to some embodiments of the present application, the first wall 212 is provided with a pressure relief mechanism 27, and the insulating sheet 26 is provided with a second hole 102, which is arranged opposite to the pressure relief mechanism 27 along the thickness direction of the first wall 212.

[0148] In this way, after the internal pressure of the battery monomer 20 reaches a preset value, the gas discharged from the pressure relief mechanism 27 will not be blocked by the insulating sheet 26, so that the high-pressure gas in the battery monomer 20 can be quickly discharged.

[0149] The power consuming device according to the embodiments of the present application will be described briefly below.

[0150] The power consuming device according to the embodiments of the present application comprises the above-mentioned battery, and since the power consuming device according to the embodiments of the present application is provided with the above-mentioned battery, the production efficiency of the battery is improved.

[0151] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: a plurality of battery cells, the battery cells including a housing having a first wall; At least one insulating sheet is bonded to the outer surface of the first wall of the plurality of battery cells.

2. The battery according to claim 1, characterized in that The insulating sheet is an integral structure.

3. The battery according to claim 1 or 2, characterized in that The insulating sheet includes a main body portion and a buffer portion. There are multiple main bodies arranged along a first direction. Two adjacent main bodies are connected by the buffer portion. Each main body portion is bonded to at least one battery cell.

4. The battery according to claim 3, characterized in that The housing has a second wall perpendicular to the first direction, and the second wall is a wall of the housing with the largest area.

5. The battery according to claim 4, characterized in that Each of the main bodies is bonded to a plurality of battery cells. The battery cells bonded to the same main body are arranged along a second direction, and the first direction is perpendicular to the second direction.

6. The battery according to any one of claims 3 to 5, characterized in that Along the first direction, there is a first gap between two adjacent battery cells; A projection of the buffer portion at least partially overlaps with the first gap along a third direction, the third direction is parallel to a thickness direction of the first wall, and the third direction is perpendicular to the first direction.

7. The battery according to any one of claims 3 to 6, characterized in that The main body is a flat plate structure, and the buffer portion is a bent structure.

8. The battery according to any one of claims 3 to 7, characterized in that Along the first direction, the dimension of the buffer portion after being straightened is L; Along the first direction, the distance between two adjacent main body parts is L1, and the size of the battery cell is T, which satisfies: (L-L1)=(1%-8%)T.

9. The battery according to any one of claims 1 to 8, characterized in that The housing includes a shell and an end cover. The shell has an opening. The end cover is connected to the shell to seal the opening. The first wall serves as the end cover.

10. The battery according to claim 9, characterized in that The battery further includes an insulating film, which covers the outer surface of the shell. One end of the insulating film close to the end cover is formed into a flange portion, and the flange portion is arranged between the insulating sheet and the end cover.

11. The battery according to any one of claims 1 to 10, characterized in that The insulating sheet is provided with a sampling harness.

12. The battery according to any one of claims 1 to 11, characterized in that The first wall is provided with an electrode terminal, and the insulating sheet is provided with a first hole for avoiding the electrode terminal.

13. The battery according to any one of claims 1 to 12, characterized in that A pressure relief mechanism is provided on the first wall, and a second hole is provided on the insulating sheet. The second hole is arranged opposite to the pressure relief mechanism along the thickness direction of the first wall.

14. An electrical device, characterized in that: The battery comprising any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

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