Battery assembly, battery and electric device

Abstract

A battery assembly (10), a battery (100) and an electric device. The battery assembly (10) comprises a plurality of battery cells (11), at least one signal sampling member (12), a first busbar (13) and second insulation members (15), wherein each of the battery cells (11) comprises a first insulation member (111), all the first insulation members (111) being located on the same sides of the plurality of battery cells (11), and the first insulation members (111) being disposed on outer surfaces of the battery cells (11) and being provided with hollowed-out regions (1111); the signal sampling member (12) passes through the hollowed-out region (1111) to connect to the battery cell (11); the first busbar (13) is disposed on the sides of the plurality of battery cells (11) where the first insulation members (111) are provided, the first busbar (13) is electrically connected to two different battery cells (11), and the first busbar (13) spans M battery cells (11), where M is greater than or equal to zero; and the hollowed-out regions (1111) through which no signal sampling members (12) pass are shielded by the second insulation members (15), such that the first busbar (13) is insulated from the battery cells (11) at the positions of the hollowed-out regions (1111), thereby reducing the short-circuit problem caused by the overlapping of the first busbar (13) with the battery cells (11) in the hollowed-out regions (1111), and improving the safety performance.

Description

Battery assembly, battery and electric device

[0001] Cross Reference to Related Applications

[0002] This application claims priority to and the benefit of the following patent application, the entire contents of which are incorporated herein by reference:

[0003] Chinese Patent Application No. 202421187662.X, filed on May 28, 2024, entitled “Battery assembly, battery and electric device” with the Chinese Patent Office. TECHNICAL FIELD

[0004] The present application relates to the technical field of batteries, in particular to a battery assembly, a battery and an electric device. BACKGROUND

[0005] With the development of new energy, more and more fields use new energy as power. Due to the advantages of high energy density, recyclable charging, safety and environmental protection, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0006] The battery includes a plurality of battery monomers, a plurality of busbars and a signal sampling piece. The plurality of busbars are connected in series and / or parallel to the plurality of battery monomers. The battery monomer is a metal shell, and an insulating film is arranged on the outside of the metal shell. The signal sampling piece is connected to the metal shell of the battery monomer through the hollow area on the insulating film to realize signal sampling. However, the busbar is easy to short-circuit with the battery monomer at the hollow area of the insulating film where the signal sampling piece is not arranged.

[0007] SUMMARY

[0008] In view of the above problems, the present application provides a battery assembly, a battery and an electric device, which solves the problem that the busbar is easy to short-circuit with the battery monomer at the hollow area of the insulating film where the signal sampling piece is not arranged.

[0009] A first aspect of the present application provides a battery assembly, comprising:

[0010] a plurality of battery monomers, each battery monomer comprising a first insulating piece, all the first insulating pieces being located on the same side of the plurality of battery monomers, the first insulating piece being arranged on the outer surface of the battery monomer and having a hollow area;

[0011] at least one signal sampling piece, the signal sampling piece being connected to the battery monomer through the hollow area;

[0012] a first busbar, the first busbar being arranged on the side of the plurality of battery monomers where the first insulating piece is arranged, the first busbar being electrically connected to two different battery monomers respectively, and the first busbar spanning M battery monomers, M being greater than or equal to zero;

[0013] The second insulating member shields the hollowed region of the first insulating member which is not penetrated by the signal sampling member, so that the first bus member is insulated from the battery cell at the position of the hollowed region.

[0014] Specifically, the signal sampling member is connected to the battery cell through the hollowed region of the first insulating member, so as to sample the signal of the battery cell. The hollowed region of the first insulating member of the battery cell which is not penetrated by the signal sampling member is shielded by the second insulating member, so that the battery cell is insulated from the first bus member, thereby reducing the short circuit problem caused by the lapping of the first bus member and the battery cell at the hollowed region, and improving the safety performance of the battery assembly.

[0015] In some embodiments of the present application, the melting point of the second insulating member is greater than or equal to 300 degrees Celsius. By setting the melting point of the second insulating member, the situation that the second insulating member is melted by the pressure relief substance of the battery cell when the battery cell is in thermal runaway is reduced, the insulation performance between the first bus member and the battery cell at the hollowed region is further improved, and the safety performance of the battery assembly is further improved.

[0016] In some embodiments of the present application, the second insulating member has a projection region on the first insulating member, and the hollowed region is within the range of the projection region. By setting the hollowed region within the range of the projection region, the second insulating member can sufficiently shield the hollowed region which is not penetrated by the signal sampling member, improve the shielding effect of the hollowed region, further improve the insulation performance between the first bus member and the battery cell at the hollowed region, and further improve the safety performance of the battery assembly.

[0017] In some embodiments of the present application, the size of the second insulating member in the direction from the first insulating member to the first bus member is greater than or equal to 0.01 millimeter and less than or equal to 5 millimeters. By setting the size of the second insulating member in the direction from the first insulating member to the first bus member, the second insulating member has sufficient size, the situation that the second insulating member is melted by the pressure relief substance ejected when the battery cell is in thermal runaway is reduced, the short circuit problem caused by the lapping of the first bus member and the battery cell at the hollowed region is further reduced, and the safety performance of the battery assembly is improved.

[0018] In some embodiments of the present application, the second insulating member comprises an insulating coating, and the first bus member and / or the first insulating member is provided with the insulating coating by spraying or electroplating. The second insulating member is provided as the insulating coating on the first bus member and / or the first insulating member by spraying or electroplating, so as to increase the fixing strength and stability of the second insulating member, better shield the hollowed-out area of the first insulating member of the battery cell without the signal sampling member, insulate the battery cell from the first bus member, reduce the short circuit problem caused by the first bus member overlapping the battery cell in the hollowed-out area, and improve the safety performance of the battery assembly.

[0019] In some embodiments of the present application, the first bus member has a first side surface facing the hollowed-out area, and the first side surface is provided with an insulating coating. The area of the insulating coating is greater than or equal to the area of the hollowed-out area and less than or equal to the area of the first side surface. By setting the area of the insulating coating on the first side surface, the insulating coating can have an area sufficient to shield the hollowed-out area of the first insulating member of the battery cell without the signal sampling member, improve the shielding effect of the hollowed-out area, insulate the battery cell from the first bus member, reduce the short circuit problem caused by the first bus member overlapping the battery cell in the hollowed-out area, and improve the safety performance of the battery assembly.

[0020] In some embodiments of the present application, the first insulating member has a second side surface facing the hollowed-out area, and the second side surface is provided with an insulating coating. The area of the insulating coating is greater than or equal to the area of the hollowed-out area and less than or equal to the area of the second side surface. By setting the area of the insulating coating on the second side surface, the insulating coating can have an area sufficient to shield the hollowed-out area of the first insulating member of the battery cell without the signal sampling member, improve the shielding effect of the hollowed-out area, insulate the battery cell from the first bus member, reduce the short circuit problem caused by the first bus member overlapping the battery cell in the hollowed-out area, and improve the safety performance of the battery assembly.

[0021] In some embodiments of the present application, the insulating coating comprises at least one of an organic compound and an inorganic compound. By setting the insulating coating, the material of the insulating coating can be selected as needed, thereby improving the flexibility of setting the insulating coating.

[0022] In some embodiments of the present application, the inorganic compound comprises at least one of silicon dioxide, magnesium oxide, aluminum oxide, calcium oxide, and titanium dioxide. By setting the inorganic compound, the cost can be effectively reduced on the basis of the insulating coating having good insulation and temperature resistance.

[0023] In some embodiments of the present application, the organic compound includes at least one of polytetrafluoroethylene, polyimide, polyaniline, polyether ether ketone, and perfluorooctane sulfonic acid. By arranging the organic compound, the insulation coating has good insulation and temperature resistance, and the cost can be effectively reduced.

[0024] In some embodiments of the present application, the second insulation member is a plate-shaped member, and the second insulation member is arranged on at least one of the first bus member and the first insulation member. The second insulation member is arranged as a plate-shaped member, so that the second insulation member has a certain structural strength, thereby improving the shielding of the hollow region of the first insulation member of the battery cell which is not provided with the signal sampling member, so that the battery cell and the first bus member are insulated, thereby reducing the short circuit problem caused by the lapping of the first bus member in the hollow region and the battery cell, and improving the safety performance of the battery assembly.

[0025] In some embodiments of the present application, the second insulation member is arranged on the first bus member, and the connection mode between the first bus member and the second insulation member includes bonding, clamping, or connecting through a connecting member. The second insulation member is arranged on the first bus member, and then the first bus member is assembled to the battery assembly, thereby improving the convenience of assembly and improving the efficiency of assembly.

[0026] In some embodiments of the present application, the second insulation member is arranged on the first insulation member, and the connection mode between the first insulation member and the second insulation member includes bonding, clamping, or connecting through a connecting member. The second insulation member is arranged on the first insulation member, thereby improving the assembly precision of the second insulation member and reducing the situation that the insulation performance between the first bus member and the battery cell is reduced due to the offset of the second insulation member.

[0027] In some embodiments of the present application, the second insulation member includes a mica plate, a mica paper, a ceramic sheet, or a ceramic composite tape. By arranging the second insulation member, the second insulation member can be selected as needed, thereby improving the flexibility of arranging the second insulation member.

[0028] In some embodiments of the present application, the first bus member has a first side surface facing the hollow region, the second insulation member is arranged on the first side surface, the area of the second insulation member is greater than or equal to the area of the hollow region, and less than or equal to the area of the first side surface. By arranging the area of the second insulation member on the first side surface, the second insulation member can have an area sufficient to shield the hollow region of the first insulation of the battery cell which is not provided with the signal sampling member, thereby improving the shielding effect of the hollow region, so that the battery cell and the first bus member are insulated, thereby reducing the short circuit problem caused by the lapping of the first bus member in the hollow region and the battery cell, and improving the safety performance of the battery assembly.

[0029] In some embodiments of the application, the first insulation member has a second side facing the hollowed-out region, and a second insulation member is arranged on the second side, the area of the second insulation member is greater than or equal to the area of the hollowed-out region, and less than or equal to the area of the second side. By setting the area of the second insulation member on the second side, the second insulation member can have an area sufficient to shield the first insulation of the battery cell that does not pass through the signal sampling member, improving the shielding effect of the hollowed-out region, insulating the battery cell from the first bus member, thereby reducing the short circuit problem caused by the overlap of the first bus member in the hollowed-out region and the battery cell, and improving the safety performance of the battery assembly.

[0030] In some embodiments of the application, the battery assembly further comprises a circuit member electrically connected to the signal sampling member. The circuit member is arranged and electrically connected to the signal sampling member to enable the transmission of the sampling signal of the signal sampling member, effectively realizing signal sampling monitoring of the battery assembly.

[0031] In some embodiments of the application, the circuit member comprises a flexible circuit board. The circuit member is arranged as a flexible circuit board, thereby reducing the volume of the circuit member, and further enabling the battery assembly to be more compact.

[0032] In some embodiments of the application, the signal sampling member comprises a temperature signal sampling member. The temperature signal sampling member is connected to the battery cell after passing through the hollowed-out region of the first insulation member, thereby enabling temperature detection of the battery cell, and further meeting the temperature sampling requirements of the battery assembly.

[0033] In some embodiments of the application, the battery cell comprises a pressure relief mechanism arranged on the side of the battery cell facing the first bus member, and the first bus member has a first projection on the battery cell, and the first projection is arranged offset from the pressure relief mechanism. The first projection of the first bus member is arranged offset from the pressure relief mechanism, thereby reducing the obstruction of the first bus member to the pressure relief mechanism, so that the pressure relief mechanism can be smoothly opened, further improving the safety performance of the battery assembly.

[0034] In some embodiments of the application, the battery assembly further comprises a second bus member, the second bus member is connected to two different battery cells respectively, the second bus member spans N battery cells, N is greater than or equal to zero, and M is greater than N. The second bus member is arranged and combined with the first bus member, thereby enabling flexible electrical connection between multiple battery cells.

[0035] In some embodiments of the present application, the second busbar is arranged on the same side of the battery cell as the first busbar, and the second busbar is insulated from the first busbar. By arranging the first busbar and the second busbar to be insulated from each other, the possibility of short circuit between the first busbar and the second busbar is reduced, and the safety performance of the battery is further improved.

[0036] In some embodiments of the present application, the second busbar has a second projection on the battery cell, and the second projection is arranged to be offset from the pressure relief mechanism. By arranging the second projection of the second busbar to be offset from the pressure relief mechanism, the obstruction of the second busbar to the pressure relief mechanism is reduced, so that the pressure relief mechanism can be smoothly opened, and the safety performance of the battery assembly is further improved.

[0037] The second aspect of the present application provides a battery, which comprises the battery assembly according to the above.

[0038] Specifically, the signal sampling member of the battery assembly is connected to the battery cell through the hollow region on the first insulation, to achieve signal sampling of the battery cell. The hollow region of the first insulation of the battery cell which is not penetrated by the signal sampling member is shielded by the second insulation member, so that the battery cell and the first busbar are insulated from each other, thereby reducing the short circuit problem caused by the first busbar overlapping the hollow region and the battery cell, and improving the safety performance of the battery assembly.

[0039] The third aspect of the present application provides a use electric device, which comprises the battery according to the above.

[0040] Specifically, in the battery, the signal sampling member of the battery assembly is connected to the battery cell through the hollow region on the first insulation, to achieve signal sampling of the battery cell. The hollow region of the first insulation of the battery cell which is not penetrated by the signal sampling member is shielded by the second insulation member, so that the battery cell and the first busbar are insulated from each other, thereby reducing the short circuit problem caused by the first busbar overlapping the hollow region and the battery cell, and improving the safety performance of the battery assembly.

[0041] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented in accordance with the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0042] FIG. 1 schematically shows a structural schematic diagram of a vehicle according to an embodiment of the present application;

[0043] FIG. 2 schematically shows a structural schematic diagram of a battery according to an embodiment of the present application;

[0044] Fig. 3 schematically shows a structural schematic diagram of a battery assembly according to an embodiment of the present application;

[0045] Fig. 4 is an exploded structural schematic diagram of the battery assembly shown in Fig. 3;

[0046] Fig. 5 is a partial structural schematic diagram of the battery assembly shown in Fig. 3, in which the busbar is removed;

[0047] Fig. 6 schematically shows a structural schematic diagram of a battery assembly according to another embodiment of the present application;

[0048] Fig. 7 is an exploded structural schematic diagram of the battery assembly shown in Fig. 6;

[0049] Fig. 8 is a partial structural schematic diagram of the battery assembly shown in Fig. 6, in which the busbar is removed;

[0050] Fig. 9 schematically shows a sectional view of a battery assembly according to still another embodiment of the present application;

[0051] Fig. 10 is an enlarged structural schematic diagram of part A of the structure shown in Fig. 9;

[0052] Fig. 11 schematically shows a sectional view of a battery assembly according to yet another embodiment of the present application;

[0053] Fig. 12 is an enlarged structural schematic diagram of part B of the structure shown in Fig. 11.

[0054] The reference signs are as follows: 1000, vehicle; 100, battery; 200, controller; 300, motor; 10, battery assembly; 11, battery cell; 111, first insulating member; 1111, hollowed-out region; 1112, second side surface; 112, pressure relief mechanism; 113, electrode terminal; 12, signal sampling member; 13, first busbar; 131, avoiding hole; 132, first side surface; 14, second busbar; 15, second insulating member; 151, through hole; 16, circuit member; 20, box; 21, first part; 22, second part; a, first direction; b, first dimension. DETAILED DESCRIPTION

[0055] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0056] 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 this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0057] 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 "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0058] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0060] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0061] 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 based on 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 therefore cannot be understood as limiting the embodiments of the present application. The orientation or position of the device or element indicated by the orientation or position must be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0062] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mount", "connect", "connect", "fix" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it 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.

[0063] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in 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 battery, the demand of its market is also increasing.

[0064] In the related art, the battery includes a plurality of battery monomers, a plurality of busbars and a signal sampling piece. The plurality of busbars are connected in series and / or parallel to the plurality of battery monomers. The battery monomer is a metal shell. An insulating film is arranged on the outside of the metal shell. The signal sampling piece is connected with the metal shell of the battery monomer through the hollow area on the insulating film to realize signal sampling. However, the busbar is easy to short-circuit with the battery monomer at the hollow area of the insulating film where the signal sampling piece is not arranged.

[0065] In the present application, the battery assembly includes a plurality of battery monomers, at least one signal sampling piece, a first busbar and a second insulating piece. Each battery monomer includes a first insulating piece. All the first insulating pieces are located on the same side of the plurality of battery monomers. The first insulating piece is arranged on the outer surface of the battery monomer and has a hollow area. The signal sampling piece is connected with the battery monomer through the hollow area. The first busbar is arranged on the side of the plurality of battery monomers where the first insulating piece is arranged. The first busbar is electrically connected with two different battery monomers respectively, and the first busbar spans M battery monomers, M is greater than or equal to zero. The hollow area without the signal sampling piece is shielded by the second insulating piece, so that the first busbar is insulated from the battery monomer at the position of the hollow area, reducing the short circuit problem caused by the overlap of the first busbar and the battery monomer at the hollow area, and improving the safety performance.

[0066] The battery related to the embodiments of the present application can be used in electric devices such as vehicles, ships or aircraft, but is not limited to. The power supply system of the electric device can be composed of the battery monomer and the battery related to the present application.

[0067] The power consumption equipment using the battery as a power source in the embodiments of the present application can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy, an electric aircraft toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0068] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above-described battery and power consumption equipment, but can also be applied to all batteries including a box body and power consumption equipment using the battery, but for the sake of simplicity of description, the following embodiments are described by taking an electric vehicle as an example.

[0069] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle 1000 provided by 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.

[0070] 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, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0071] FIG. 2 shows a structural schematic diagram of the battery 100 according to an embodiment of the present application. In order to meet different power consumption requirements, the battery 100 can include a plurality of battery assemblies 10, which can be connected in series, in parallel, or in a mixed connection (the mixed connection refers to a mixture of series and parallel connection) and arranged in a box body 20 to form the battery 100.

[0072] The box 20 is used to provide a containing space for the battery assembly 10, and can have various structures. In some embodiments, the box 20 can include a first part 21 and a second part 22, the first part 21 and the second part 22 are mutually covered, and the first part 21 and the second part 22 jointly define a containing space for containing the battery assembly 10. The second part 22 can be a hollow structure with one end open, and the first part 21 can be a plate structure, which is covered on the open side of the second part 22 to jointly define the containing space with the second part 22. The first part 21 and the second part 22 can also be hollow structures with one side open, and the open side of the first part 21 is covered on the open side of the second part 22. Of course, the box 20 formed by the first part 21 and the second part 22 can have various shapes, such as a cylinder, a cuboid, etc. In addition, the material of the box 20 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber and epoxy resin, and the embodiments of the present application are not limited thereto.

[0073] As shown in FIG. 3, in the present application, the battery assembly 10 includes a plurality of battery monomers 11 and a plurality of busbars, the battery monomer 11 refers to the smallest unit that constitutes the battery assembly 10. The plurality of battery monomers 11 can be connected in series or in parallel or in a mixed manner (the mixed manner refers to that the plurality of battery monomers 11 are connected in series and in parallel at the same time) to form the battery assembly 10, and the busbar is a component that can connect the plurality of battery monomers 11 in series or in parallel to realize the electrical connection between the plurality of battery monomers 11. The busbar can also be called a busbar, a tab or a busbar, which is generally a metal sheet and can be welded to the electrode terminal 113 of the battery monomer 11 to connect the plurality of battery monomers 11 in series or in parallel. The plurality of battery monomers 11 can be directly connected in series or in parallel or in a mixed manner by a busbar assembly, each battery monomer 11 can be a secondary battery 100 or a primary battery 100; can also be a lithium-sulfur battery 100, a sodium-ion battery 100 or a magnesium-ion battery 100, but is not limited thereto. The battery monomer 11 can be a cylinder, a flat body, a cuboid or other shapes, etc.

[0074] The battery cell 11 can contain one or more cell components inside, which are components where electrochemical reactions occur in the battery cell 11. The tab is a component that transfers current in the battery cell 11. The cell component is mainly formed by winding or stacking the positive and negative electrode sheets, and a separator is usually arranged between the positive and negative electrode sheets. The positive and negative electrode sheets have parts with active materials constituting the main body of the cell component, and the parts without active materials of the positive and negative electrode sheets are respectively provided with tabs. The positive and negative electrode tabs can be located at one end of the main body or at two ends of the main body respectively. During the charging and discharging processes of the battery 100, the positive and negative active materials react with the electrolyte, and the tab is connected between the tab and the electrode terminal 113 to form a current loop.

[0075] In some embodiments, the battery cell 11 can be provided with functional components such as the electrode terminal 113. The electrode terminal 113 can be used to electrically connect the cell component and the busbar for outputting or inputting the electrical energy of the battery cell 11. In some embodiments, the battery cell 11 can also be provided with a pressure relief mechanism 112 for relieving the internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold value. The threshold value is designed differently according to different design requirements. The threshold value can depend on the material of one or more of the positive electrode sheet, the negative electrode sheet, the electrolyte, and the separator in the battery cell. The pressure relief mechanism 112 can take the form of a rupture disc, a gas valve, a pressure relief valve, or a safety valve.

[0076] In some embodiments of the present application, as shown in FIGS. 3-12, a battery assembly 10 is provided, which includes a plurality of battery cells 11, at least one signal sampling member 12, a first busbar 13, and a second insulating member 15, each battery cell 11 includes a first insulating member 111, all the first insulating members 111 are located on the same side of the plurality of battery cells 11, the first insulating member 111 is arranged on the outer surface of the battery cell 11 and has a hollow area 1111, the signal sampling member 12 is connected with the battery cell 11 through the hollow area 1111, the first busbar 13 is arranged on the side of the plurality of battery cells 11 provided with the first insulating member 111, the first busbar 13 is electrically connected with two different battery cells 11 respectively, and the first busbar 13 spans M battery cells 11, M is greater than or equal to zero, the hollow area 1111 without the signal sampling member 12 is shielded by the second insulating member 15, so that the first busbar 13 is insulated from the battery cell 11 at the position of the hollow area 1111.

[0077] Specifically, taking the battery monomer 11 as a cuboid structure as an example, a plurality of battery monomers 11 are arranged in a preset direction, which is the length direction or the width direction of the battery monomer 11, wherein the first busbar 13 electrically connects two spaced battery monomers 11, and at least one battery monomer 11 is arranged between the two spaced battery monomers 11, which is the battery monomer 11 crossed by the first busbar 13.

[0078] The first busbar 13 crosses M battery monomers 11 and M is greater than zero (M is a positive integer), at this time, there is a voltage difference between the first busbar 13 and the battery monomer 11.

[0079] Each battery monomer 11 is provided with a first insulating member 111, and in the plurality of battery monomers 11, the side of each battery monomer 11 provided with the first insulating member 111 faces the same side of the plurality of battery monomers 11, and the signal sampling member 12 and the first busbar 13 are arranged on the side of the battery monomer 11 provided with the first insulating member 111.

[0080] In order to facilitate signal detection of the battery monomer 11, a hollow area 1111 is arranged on the first insulating member 111. The hollow area 1111 refers to a hole structure arranged on the first insulating member 111, which can satisfy the signal sampling member 12 passing through.

[0081] The number of signal sampling members 12 arranged in the battery assembly 10 is less than the number of battery monomers 11. After the battery assembly 10 is assembled, the hollow area 1111 of part of the battery monomers 11 is in an unused state, at this time, the side of the battery monomer 11 facing the first busbar 13 is exposed outside through the hollow area 1111. If the battery monomer 11 occurs thermal runaway, the opening of the pressure relief mechanism 112 of the battery monomer 11, the ejected substances enter the position of the hollow area 1111 which is not provided with the signal sampling member 12, which is easy to cause the first busbar 13 and the battery monomer 11 to lap, thereby causing the first busbar 13 and the battery monomer 11 to short circuit.

[0082] The signal sampling member 12 is connected with the battery monomer 11 through the hollow area 1111 on the first insulating member, so as to realize signal sampling of the battery monomer 11, and the second insulating member 15 shields the hollow area 1111 of the first insulating member of the battery monomer 11 which is not provided with the signal sampling member 12, wherein the shielding means that the second insulating member 15 supplements the structure of the hollow area 1111 of the first insulating member 111, so that the battery monomer 11 cannot contact the first busbar 13 through the hollow area 1111.

[0083] In the present application, the second insulating member 15 shields the first insulating hollow region 1111 of the battery monomer 11 which is not provided with the signal sampling member 12, so that the battery monomer 11 is insulated from the first bus member 13, thereby reducing the short circuit problem caused by the lapping of the first bus member 13 and the battery monomer 11 in the hollow region 1111, and improving the safety performance of the battery assembly 10.

[0084] It should be noted that in the present application, the first insulating member 111 is a sheet member which is fixed on the outer surface of the battery monomer 11 (for example, on the top cover of the battery monomer 11) by bonding or the like. The first insulating member 111 not only has insulating properties, but also has high-temperature resistance, that is, the first insulating member 111 will not be melted under certain high-temperature conditions. The first insulating member 111 can be a mica sheet or a ceramic sheet, etc.

[0085] Further, the plurality of battery monomers 11 are arranged in a predetermined direction, and the first bus member 13 is arranged across M battery monomers 11, wherein M can be one, two, three, four, five, six, seven, eight, etc.

[0086] In addition, one end of the first bus member is electrically connected to the electrode terminal 113 of one battery monomer 11 by welding, clamping or fastener connection, and the other end of the first bus member is electrically connected to the electrode terminal 113 of another battery monomer 11 by welding, clamping or fastener connection.

[0087] In addition, the number of first bus members can be one, two, three, four, five, six, seven, eight, etc., and the number of second bus members can also be one, two, three, four, five, six, seven, eight, etc.

[0088] It should be noted that the number of battery monomers 11 can be three, four, five, six, seven, eight, etc. At the same time, the number of signal sampling members 12 is less than the number of battery monomers 11, which can be one, two, three, four, five, six, seven, eight, etc.

[0089] In some embodiments of the present application, the melting point of the second insulating member 15 is greater than or equal to 300 degrees Celsius.

[0090] Specifically, the melting point of the second insulation piece 15 is set to be greater than or equal to 300 degrees Celsius, so that the second insulation piece 15 can have high-temperature resistance performance, when the battery monomer 11 occurs thermal runaway, the possibility of the thermal runaway spewing substance melting the second insulation piece 15 is reduced, the insulation performance between the first confluence piece 13 and the battery monomer 11 is further improved, the situation of short circuit between the first confluence piece 13 and the battery monomer 11 is further reduced, and the safety performance of the battery assembly 10 is further improved.

[0091] It should be pointed out that in the present application, the melting point of the second insulation piece 15 can be 300 degrees Celsius, 330 degrees Celsius, 350 degrees Celsius, 380 degrees Celsius, 400 degrees Celsius, 430 degrees Celsius, 450 degrees Celsius, 480 degrees Celsius, 500 degrees Celsius, etc.

[0092] In some embodiments of the present application, the second insulation piece 15 has a projection area on the first insulation piece 111, and the hollowed-out area 1111 is within the range of the projection area.

[0093] Specifically, the first insulation piece 111 and the second insulation piece 15 are both arranged between the battery monomer 11 and the first confluence piece 13, and in the direction from the first confluence piece 13 to the battery monomer 11, the second insulation piece 15 can form a projection area on the first insulation piece 111, and the hollowed-out area 1111 on the first insulation piece 111 is within the range of the projection area. Wherein, the hollowed-out area 1111 within the range of the projection area means that the hollowed-out area 1111 is arranged entirely within the projection area, and the edge of the hollowed-out area 1111 does not exceed the edge of the projection area.

[0094] In the present application, by arranging the hollowed-out area 1111 within the range of the projection area, the second insulation piece 15 can sufficiently shield the hollowed-out area 1111 of the signal sampling piece 12, improve the shielding effect of the hollowed-out area 1111, and further improve the insulation performance between the first confluence piece 13 and the battery monomer 11 in the hollowed-out area 1111, and further improve the safety performance of the battery assembly 10.

[0095] It should be pointed out that in the present application, the shape of the hollowed-out area 1111 includes but is not limited to circular, elliptical, triangular, quadrilateral, pentagonal, hexagonal, etc. At the same time, the shape of the projection area includes but is not limited to circular, elliptical, triangular, quadrilateral, pentagonal, hexagonal, etc.

[0096] In addition, the shape of the projection region can be the same as or different from the shape of the hollowed region 1111, when the shape of the projection region is the same as the shape of the hollowed region 1111, the area of the projection region is greater than or equal to the area of the hollowed region 1111, when the shape of the projection region is different from the shape of the hollowed region 1111, the area of the projection region is greater than the area of the hollowed region 1111.

[0097] In some embodiments of the present application, the size of the second insulating member 15 in the direction from the first insulating member 111 to the first bus member 13 is greater than or equal to 0.01 mm and less than or equal to 5 mm.

[0098] Specifically, as shown in FIG. 10 or FIG. 12, in FIG. 10 or FIG. 12, the first direction a is consistent with the direction from the first insulating member 111 to the first bus member 13, and the size of the second insulating member 15 in the first direction a is the first size b, where 0.01 mm≤b≤5 mm.

[0099] In the present application, by setting the size of the second insulating member 15 in the direction from the first insulating member 111 to the first bus member 13, the second insulating member 15 has sufficient size, reducing the case that the second insulating member 15 is melted by the pressure relief material sprayed by the battery monomer 11 when thermal runaway occurs, further reducing the short circuit problem of the first bus member 13 when the hollowed region 1111 and the battery monomer 11 are overlapped, and improving the safety performance of the battery assembly 10.

[0100] It should be noted that the first size b can be 0.01 mm, 0.5 mm, 0.1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm.

[0101] In some embodiments of the present application, the second insulating member 15 includes an insulating coating, and in the implementation process, the insulating coating can be provided only on the first bus member 13, or only on the first insulating member 111, or on both the first bus member 13 and the first insulating member 111.

[0102] As shown in FIG. 9 and FIG. 10, the second insulating member 15, which is an insulating coating, is provided on the first insulating member 111, and the second insulating member 15 shields the hollowed region 1111 of the first insulating member 111 which is not provided with the signal sampling member 12, so that the first bus member 13 and the battery monomer 11 are insulated at the position of the hollowed region 1111.

[0103] As shown in FIGS. 11 and 12, the second insulating part 15 of the insulating coating is arranged on the first bus part 13, and the second insulating part 15 is arranged opposite to and shields the hollowed area 1111 of the first insulating part 111 on which the signal sampling part 12 is not arranged, so that the first bus part 13 is insulated from the battery monomer 11 at the position of the hollowed area 1111.

[0104] In addition, the arrangement mode of the second insulating part 15 of the insulating coating can be spraying or electroplating. The second insulating part 15 is arranged as an insulating coating on at least one of the first bus part 13 and the first insulating part 111 by spraying or electroplating, so that the fixing strength and stability of the second insulating part 15 can be increased, and the hollowed area 1111 of the first insulating part 111 of the battery monomer 11 on which the signal sampling part 12 is not arranged can be better shielded, so that the battery monomer 11 is insulated from the first bus part 13, and the short circuit problem of the first bus part 13 caused by the lapping of the hollowed area 1111 and the battery monomer 11 is reduced, and the safety performance of the battery assembly 10 is improved.

[0105] In some embodiments of the present application, the first bus part 13 has a first side surface 132 facing the hollowed area 1111, and the insulating coating is arranged on the first side surface 132, and the area of the insulating coating is greater than or equal to the area of the hollowed area 1111 and less than or equal to the area of the first side surface 132.

[0106] Specifically, by arranging the area of the insulating coating on the first side surface 132, the insulating coating can have an area sufficient to shield the hollowed area 1111 of the first insulating part of the battery monomer 11 on which the signal sampling part 12 is not arranged, the shielding effect of the hollowed area 1111 is improved, the battery monomer 11 is insulated from the first bus part 13, and the short circuit problem of the first bus part 13 caused by the lapping of the hollowed area 1111 and the battery monomer 11 is reduced, and the safety performance of the battery assembly 10 is improved.

[0107] In some embodiments of the present application, the first insulating part 111 has a second side surface facing the hollowed area 1111, and the insulating coating is arranged on the second side surface, and the area of the insulating coating is greater than or equal to the area of the hollowed area 1111 and less than or equal to the area of the second side surface.

[0108] Specifically, by setting the area of the insulating coating on the second side surface, the insulating coating can have an area sufficient to shield the first insulating hollow region 1111 of the battery monomer 11 without the signal sampling member 12, thereby improving the shielding effect on the hollow region 1111, insulating the battery monomer 11 from the first bus member 13, and reducing the short circuit problem of the first bus member 13 when the hollow region 1111 is overlapped with the battery monomer 11, thereby improving the safety performance of the battery assembly 10.

[0109] It should be understood that when the insulating coating is arranged on the first insulating member 111 by spraying or electroplating, the insulating coating supplements the structure of the hollow region 1111, and at this time, the insulating coating supplementing the hollow region 1111 can be connected to the surface of the battery monomer 11 facing the hollow region 1111.

[0110] In some embodiments of the present application, the insulating coating comprises at least one of an organic compound and an inorganic compound.

[0111] Specifically, the insulating coating can comprise one or more materials, and when the insulating coating comprises only one material, the material can be an organic compound or an inorganic compound; and when the insulating coating comprises multiple materials, the multiple materials comprise an organic compound and an inorganic compound.

[0112] In the present application, by arranging the insulating coating, the insulating coating can be selected as needed, thereby improving the flexibility of arranging the insulating coating.

[0113] In some embodiments of the present application, the inorganic compound comprises at least one of silicon dioxide, magnesium oxide, aluminum oxide, calcium oxide, and titanium dioxide.

[0114] Specifically, by arranging the non-metallic oxide, the cost can be effectively reduced on the basis of the insulating coating having good insulation and temperature resistance.

[0115] In some embodiments of the present application, the organic compound comprises at least one of polytetrafluoroethylene, polyimide, polyaniline, polyether ether ketone, and perfluorooctane sulfonic acid.

[0116] Specifically, by arranging the organic compound, the cost can be effectively reduced on the basis of the insulating coating having good insulation and temperature resistance.

[0117] In some embodiments of the present application, as shown in FIG. 4 or FIG. 7, the second insulating member 15 is a plate-shaped member, and the second insulating member 15 is arranged on at least one of the first bus member 13 and the first insulating member 111.

[0118] Specifically, the second insulation member 15 has various embodiments, for example, the second insulation member 15 is arranged only on the first bus member 13, the second insulation member 15 can also be arranged only on the first insulation member 111, and the second insulation member 15 can also be arranged on both the first bus member 13 and the first insulation member 111, so that the second insulation member 15 can be arranged as needed, and the flexibility of the layout and installation of the second insulation member 15 is improved.

[0119] In addition, the second insulation member 15 is arranged as a plate-shaped member with a certain thickness, so that the second insulation member 15 has a certain structural strength, thereby improving the shielding of the hollow region 1111 of the first insulation member 111 of the battery monomer 11 which is not provided with the signal sampling member 12, so that the battery monomer 11 and the first bus member 13 are insulated, thereby reducing the short circuit problem of the first bus member 13 lapping with the battery monomer 11 in the hollow region 1111, and improving the safety performance of the battery assembly 10.

[0120] It should be pointed out that in the present application, the second insulation member 15 can be an integral structure or a split structure.

[0121] For example, as shown in FIG. 4, in FIG. 4, the second insulation member 15 is an integral structure, that is, one second insulation member 15 is used to shield the hollow region 1111 of the plurality of battery monomers 11 which is not provided with the signal sampling member 12, and the second insulation member 15 is provided with a through hole 151 at a position corresponding to the position provided with the signal sampling member 12, so that the signal sampling member 12 can pass through. The second insulation member 15 is arranged as an integral structure, thereby improving the convenience of assembly, so that the production efficiency can be effectively improved.

[0122] For example, as shown in FIG. 7, in FIG. 7, the second insulation member 15 is a split structure, that is, each hollow region 1111 which is not provided with the signal sampling member 12 is shielded by a part of the second insulation member 15. The second insulation member 15 is arranged as a split structure, which can reduce the amount of the second insulation member 15, thereby effectively reducing the manufacturing cost.

[0123] In some embodiments of the present application, the second insulation member 15 is arranged on the first bus member 13, and the connection mode between the first bus member 13 and the second insulation member 15 includes bonding, clamping or connecting through a connecting member.

[0124] Specifically, the second insulation member 15 is arranged on the first bus member 13, the second insulation member 15 can be assembled on the first bus member 13 first, and then the first bus member 13 is assembled on the battery assembly 10, thereby improving the convenience of assembly, so that the assembly efficiency is improved.

[0125] For example, the connection between the first busbar 13 and the second insulating member 15 is by adhesion, i.e. the first busbar 13 and the second insulating member 15 are fixed by adhesion.

[0126] For example, the connection between the first busbar 13 and the second insulating member 15 is by clamping, i.e. a clamping groove is provided on the first busbar 13, the second insulating member 15 is embedded into the clamping groove, and is clamped and fixed with the side wall of the clamping groove.

[0127] For example, the connection between the first busbar 13 and the second insulating member 15 is by a connecting member, i.e. the first busbar 13 and the second insulating member 15 are connected and fixed by a screw (insulating material).

[0128] In some embodiments of the present application, the first insulating member 111 is provided with the second insulating member 15, and the connection between the first insulating member 111 and the second insulating member 15 includes adhesion, clamping or a connecting member.

[0129] Specifically, the second insulating member 15 is assembled on the first insulating member 111, which improves the assembly accuracy of the second insulating member 15 and reduces the situation that the insulation performance between the first busbar 13 and the battery monomer 11 is reduced due to the offset of the second insulating member 15.

[0130] For example, the connection between the first insulating member 111 and the second insulating member 15 is by adhesion, i.e. the first insulating member 111 provided with the second insulating member 15 is fixed by adhesion.

[0131] For example, the connection between the first insulating member 111 and the second insulating member 15 is by clamping, i.e. a clamping groove is provided on the first insulating member 111, the second insulating member 15 is embedded into the clamping groove, and is clamped and fixed with the side wall of the clamping groove.

[0132] For example, the connection between the first insulating member 111 and the second insulating member 15 is by a connecting member, i.e. the first insulating member 111 and the second insulating member 15 are connected and fixed by a screw (insulating material).

[0133] In some embodiments of the present application, the second insulating member 15 includes a mica plate, a mica paper, a ceramic sheet or a ceramic composite tape.

[0134] Specifically, by providing the second insulating member 15, the second insulating member 15 can be selected as needed, thereby improving the flexibility of setting the second insulating member 15.

[0135] In some embodiments of the present application, the first busbar 13 has a first side surface 132 facing the hollowed-out area 1111, and the second insulating member 15 is arranged on the first side surface 132. The area of the second insulating member 15 is greater than or equal to the area of the hollowed-out area 1111 and less than or equal to the area of the first side surface 132.

[0136] Specifically, by setting the area of the second insulating member 15 on the first side surface 132, the second insulating member 15 can have an area sufficient to shield the first insulating hollowed-out area 1111 of the battery cell 11 which is not penetrated by the signal sampling member 12, thereby improving the shielding effect on the hollowed-out area 1111 and insulating the battery cell 11 from the first busbar 13, so as to reduce the short circuit problem caused by the overlap of the first busbar 13 with the battery cell 11 in the hollowed-out area 1111 and improve the safety performance of the battery assembly 10.

[0137] In some embodiments of the present application, the first insulating member 111 has a second side surface facing the hollowed-out area 1111, and the second insulating member 15 is arranged on the second side surface. The area of the second insulating member 15 is greater than or equal to the area of the hollowed-out area 1111 and less than or equal to the area of the second side surface.

[0138] Specifically, by setting the area of the second insulating member 15 on the second side surface, the second insulating member 15 can have an area sufficient to shield the first insulating hollowed-out area 1111 of the battery cell 11 which is not penetrated by the signal sampling member 12, thereby improving the shielding effect on the hollowed-out area 1111 and insulating the battery cell 11 from the first busbar 13, so as to reduce the short circuit problem caused by the overlap of the first busbar 13 with the battery cell 11 in the hollowed-out area 1111 and improve the safety performance of the battery assembly 10.

[0139] In some embodiments of the present application, as shown in FIGS. 3-5 or 6-8, the battery assembly 10 further comprises a circuit member 16 electrically connected with the signal sampling member 12. The circuit member 16 is arranged and electrically connected with the signal sampling member 12 to enable the transmission of the sampling signal of the signal sampling member 12, thereby effectively realizing the signal sampling monitoring of the battery assembly 10.

[0140] In some embodiments of the present application, the circuit member 16 comprises a flexible circuit board.

[0141] Specifically, the flexible circuit board is a printed circuit board made of polyimide or polyester film as a base material, which has high reliability and excellent flexibility, and has the characteristics of high wiring density, light weight, thin thickness, and good bending property.

[0142] In the present application, the circuit member 16 is arranged as a flexible circuit board, so that the volume of the circuit member 16 can be reduced, and thus the battery assembly 10 can be more compact.

[0143] In some embodiments of the present application, the signal sampling member 12 comprises a temperature signal sampling member.

[0144] Specifically, the temperature signal sampling member is connected to the battery monomer 11 after passing through the hollow region 1111 of the first insulation member 111, so that the temperature of the battery monomer 11 can be detected, and thus the temperature sampling requirement of the battery assembly 10 is met.

[0145] In addition, in the present application, the first bus member 13 is provided with a relief hole 131, and the temperature sampling member is connected to the battery monomer 11 after passing through the relief hole 131 and the hollow region 1111. The relief hole 131 is arranged to facilitate the temperature sampling member to pass through the first bus member 13 (insulation is arranged between the temperature sampling member and the relief hole 131), so that the overall structure of the battery assembly 10 is more compact.

[0146] It should be noted that the temperature sampling member is in contact with the battery monomer 11 through a heat-conducting pad. The heat-conducting pad is arranged between the temperature sampling member and the battery monomer 11, and is used to transfer the temperature of the battery monomer 11 to the temperature sampling member, so as to realize heat conduction between the temperature sampling member and the battery monomer 11. The heat-conducting pad and the temperature sampling member can be connected by means of gluing or the like. The gluing method can be realized by coating a heat-conducting glue between the heat-conducting pad and the temperature sampling member.

[0147] The heat-conducting pad has a high heat-conducting coefficient, a high heat-conducting efficiency, a good compression performance, and a strong pressure-bearing performance, and can bear the extrusion when the module EOL (End of Life, i.e. the end of the production line) expands and deforms and is impacted and vibrated. Therefore, the temperature sampling member is in contact with the battery monomer 11 through the heat-conducting pad, which not only can realize a more efficient temperature sampling process, but also is conducive to improving the contact sufficiency of the temperature sampling member and the battery monomer 11.

[0148] In some embodiments of the present application, as shown in FIG. 4 or FIG. 7, the battery monomer 11 comprises a pressure relief mechanism 112, the pressure relief mechanism 112 is arranged on the side of the battery monomer 11 facing the first bus member 13, the first bus member 13 has a first projection on the battery monomer 11, and the first projection is arranged away from the pressure relief mechanism 112.

[0149] Specifically, the first bus member 13 is a metal member, the melting point of the metal member is greater than the temperature of the high-temperature substance sprayed out when the pressure relief mechanism 112 is opened, and if there is an overlapping region between the first projection and the pressure relief mechanism 112, it will interfere with the opening of the pressure relief mechanism 112. In addition, there is a voltage difference between the opening part of the pressure relief mechanism 112 and the first bus member 13, and the opening part will short circuit when it is opened.

[0150] In the present application, the first projection of the first busbar 13 is arranged to be staggered with the pressure relief mechanism 112, thereby reducing the obstruction of the first busbar 13 to the pressure relief mechanism 112, so as to enable the pressure relief mechanism 112 to be smoothly opened, further improving the safety performance of the battery assembly 10.

[0151] At the same time, the first projection of the first busbar 13 is arranged to be staggered with the pressure relief mechanism 112, so that the first busbar 13 avoids the pressure relief mechanism 112, which can reduce the short circuit between the first busbar 13 and the pressure relief mechanism 112 after the pressure relief mechanism 112 is opened, and improve the safety performance of the battery assembly 10.

[0152] It should be understood that when the first projection is arranged to be staggered with the pressure relief mechanism 112, the first projection and the pressure relief mechanism 112 have no overlapping area.

[0153] In some embodiments of the present application, as shown in FIGS. 3-4 or 6-7, the battery assembly 10 further comprises a second busbar 14, the second busbar 14 is connected to two different battery cells 11 respectively, the second busbar 14 spans N battery cells 11, N is greater than or equal to zero, and M is greater than N.

[0154] Specifically, among the plurality of battery cells 11 of the battery assembly 10, the plurality of battery cells 11 are arranged in a preset direction, the first busbar 13 connects two battery cells 11, and the second busbar 14 connects another two battery cells 11. There are M battery cells 11 between the two battery cells 11 connected by the first busbar 13, M is greater than zero, there are N battery cells 11 between the two battery cells 11 connected by the second busbar 14, N is greater than or equal to zero, and M is greater than N.

[0155] The second busbar 14 is arranged in combination with the first busbar 13, thereby enabling flexible electrical connection between the plurality of battery cells 11.

[0156] It should be pointed out that in the present application, the number of first busbars 13 can be one, two, three, four, five, six, seven, etc. The number of first busbars 13 can also be one, two, three, four, five, six, seven, etc.

[0157] In some embodiments of the present application, as shown in FIGS. 3-4 or 6-7, the second busbar 14 is arranged side by side with the first busbar 13 on the same side of the battery cell 11, and the second busbar 14 is arranged to be insulated from the first busbar 13.

[0158] Specifically, the second busbar 14 is arranged on the same side of the battery cell 11 as the first busbar 13, which can improve the convenience in the assembly process, thereby effectively improving the assembly efficiency of the battery assembly 10.

[0159] In addition, by arranging the first busbar 13 and the second busbar 14 to be insulated, the possibility of short circuit between the first busbar 13 and the second busbar 14 is reduced, and the safety performance of the battery 100 is further improved.

[0160] It should be noted that the arrangement of the first busbar 13 and the second busbar 14 to be insulated includes but is not limited to arranging an insulating component between the first busbar 13 and the second busbar 14.

[0161] In some embodiments of the present application, the second busbar 14 has a second projection on the battery cell 11, and the second projection is arranged to be offset from the pressure relief mechanism 112.

[0162] Specifically, the second projection of the second busbar 14 is arranged to be offset from the pressure relief mechanism 112, thereby reducing the obstruction of the pressure relief mechanism 112 by the second busbar 14, so that the pressure relief mechanism 112 can be smoothly opened, and the safety performance of the battery assembly 10 is further improved.

[0163] At the same time, arranging the second projection of the second busbar 14 to be offset from the pressure relief mechanism 112 allows the second busbar 14 to avoid the pressure relief mechanism 112, which can reduce the short circuit between the second busbar 14 and the pressure relief mechanism 112 after the pressure relief mechanism 112 is opened, and improve the safety performance of the battery assembly 10.

[0164] It should be understood that when the second projection is arranged to be offset from the pressure relief mechanism 112, the second projection and the pressure relief mechanism 112 have no overlapping area.

[0165] As shown in FIGS. 2 to 12, the second aspect of the present application provides a battery 100, which comprises the battery assembly 10 according to the above.

[0166] Specifically, the signal sampling member 12 of the battery assembly 10 is connected to the battery cell 11 through the hollow region 1111 of the first insulation, so as to realize signal sampling of the battery cell 11. The hollow region 1111 of the first insulation of the battery cell 11 which is not provided with the signal sampling member 12 is shielded by the second insulation member 15, so that the battery cell 11 and the first busbar 13 are arranged to be insulated, thereby reducing the short circuit problem caused by the lapping of the hollow region 1111 and the battery cell 11, and improving the safety performance of the battery assembly 10.

[0167] As shown in FIGS. 1 to 12, the third aspect of the present application provides a use electric device, which comprises the battery 100 according to the above.

[0168] Specifically, in the battery 100, the signal sampling member 12 of the battery assembly 10 is connected with the battery monomer 11 through the hollow area 1111 of the first insulation, so as to realize the signal sampling of the battery monomer 11. The hollow area 1111 of the first insulation of the battery monomer 11 which is not provided with the signal sampling member 12 is shielded by the second insulation member 15, so that the battery monomer 11 is insulated from the first bus member 13, thereby reducing the short circuit problem caused by the overlap of the first bus member 13 and the battery monomer 11 in the hollow area 1111, and improving the safety performance of the battery assembly 10.

[0169] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0170] In the embodiments of the present application, as shown in FIGS. 3-12, the present application provides a battery assembly 10, which comprises a plurality of battery monomers 11, at least one signal sampling member 12, a first bus member 13 and a second insulation member 15. Each battery monomer 11 comprises a first insulation member 111, all the first insulation members 111 are located on the same side of the plurality of battery monomers 11, the first insulation member 111 is provided on the outer surface of the battery monomer 11 and has a hollow area 1111, the signal sampling member 12 is connected with the battery monomer 11 through the hollow area 1111, the first bus member 13 is provided on the side of the plurality of battery monomers 11 provided with the first insulation member 111, the first bus member 13 is respectively electrically connected with two different battery monomers 11, and the first bus member 13 spans M battery monomers 11, M is greater than or equal to zero, and the hollow area 1111 without the signal sampling member 12 is shielded by the second insulation member 15, so that the first bus member 13 is insulated from the battery monomer 11 at the position of the hollow area 1111.

[0171] Further, the melting point of the second insulation member 15 is greater than or equal to 300 degrees Celsius, the second insulation member 15 has a projection area on the first insulation member 111, and the hollow area 1111 is within the range of the projection area. In the direction from the first insulation member 111 to the first bus member 13, the size of the second insulation member 15 is greater than or equal to 0.01 millimeter and less than or equal to 5 millimeters.

[0172] In some embodiments, the second insulating member 15 comprises an insulating coating layer which is sprayed or plated on the first bus member 13 and / or the first insulating member 111. The first bus member 13 has a first side surface 132 facing the hollowed area 1111, and the insulating coating layer is provided on the first side surface 132, the area of the insulating coating layer being greater than or equal to the area of the hollowed area 1111 and less than or equal to the area of the first side surface 132. The first insulating member 111 has a second side surface facing the hollowed area 1111, and the insulating coating layer is provided on the second side surface, the area of the insulating coating layer being greater than or equal to the area of the hollowed area 1111 and less than or equal to the area of the second side surface.

[0173] Further, the insulating coating layer comprises at least one of an organic compound and an inorganic compound, and the ceramic metal comprises mica and / or glass fiber. The inorganic compound comprises at least one of silicon dioxide, magnesium oxide, aluminum oxide, calcium oxide and titanium dioxide. The organic compound comprises at least one of polytetrafluoroethylene, polyimide, polyaniline, polyether ether ketone and perfluorooctane sulfonic acid.

[0174] In some embodiments, the second insulating member 15 is a plate-shaped member, and the second insulating member 15 is provided on at least one of the first bus member 13 and the first insulating member 111. The second insulating member 15 is provided on the first bus member 13, and the connection between the first bus member 13 and the second insulating member 15 comprises bonding, clamping or connecting through a connecting member. The second insulating member 15 is provided on the first insulating member 111, and the connection between the first insulating member 111 and the second insulating member 15 comprises bonding, clamping or connecting through a connecting member. The second insulating member 15 comprises mica plate, mica paper, ceramic sheet or ceramic composite tape.

[0175] Further, the first bus member 13 has a first side surface 132 facing the hollowed area 1111, and the second insulating member 15 is provided on the first side surface 132, the area of the second insulating member 15 being greater than or equal to the area of the hollowed area 1111 and less than or equal to the area of the first side surface 132. The first insulating member 111 has a second side surface facing the hollowed area 1111, and the second insulating member 15 is provided on the second side surface, the area of the second insulating member 15 being greater than or equal to the area of the hollowed area 1111 and less than or equal to the area of the second side surface.

[0176] The battery assembly 10 further comprises a circuit member 16 electrically connected with the signal sampling member 12. The circuit member 16 comprises a flexible circuit board. The battery cell 11 comprises a pressure relief mechanism 112 arranged on the side of the battery cell 11 facing the first bus member 13, the first bus member 13 having a first projection on the battery cell 11, the first projection being arranged away from the pressure relief mechanism 112. The battery assembly 10 further comprises a second bus member 14, the second bus member 14 connecting two different battery cells 11 respectively, the second bus member 14 spanning N battery cells 11, N being greater than or equal to zero, and M being greater than N. The second bus member 14 is arranged on the same side of the battery cell 11 as the first bus member 13, and is insulated from the first bus member 13. The second bus member 14 has a second projection on the battery cell 11, the second projection being arranged away from the pressure relief mechanism 112.

[0177] In the present application, the signal sampling member 12 is connected with the battery cell 11 through the hollowed region 1111 on the first insulation, so as to realize signal sampling of the battery cell 11. The hollowed region 1111 on the first insulation of the battery cell 11 not provided with the signal sampling member 12 is shielded by the second insulation member 15, so that the battery cell 11 is insulated from the first bus member 13, thereby reducing the short circuit problem caused by the lapping of the hollowed region 1111 and the battery cell 11, and improving the safety performance of the battery assembly 10.

[0178] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery assembly, wherein, The battery assembly comprises: a plurality of battery cells, each of the battery cells comprising a first insulating member, all the first insulating members being located on the same side of the plurality of battery cells, the first insulating member being arranged on an outer surface of the battery cell and having a hollowed-out region; at least one signal sampling member connected to the battery cell through the hollowed-out region; a first bus member arranged on the side of the plurality of battery cells provided with the first insulating member, the first bus member being electrically connected to two different battery cells respectively, and the first bus member spanning M battery cells, M being greater than or equal to zero; a second insulating member, the hollowed-out region not provided with the signal sampling member being shielded by the second insulating member, so that the first bus member is arranged to be insulated from the battery cell at the position of the hollowed-out region.

2. The battery assembly of claim 1, wherein, The melting point of the second insulating member is greater than or equal to 300 degrees Celsius.

3. The battery assembly of claim 1 or 2, wherein, The second insulating member has a projection area on the first insulating member, and the hollowed-out region is within the range of the projection area.

4. The battery assembly of any one of claims 1 to 3, wherein, In the direction from the first insulating member to the first bus member, the size of the second insulating member is greater than or equal to 0.01 millimeter and less than or equal to 5 millimeters.

5. The battery assembly of any one of claims 1 to 4, wherein, The second insulating member comprises an insulating coating, and the first bus member and / or the first insulating member is provided with the insulating coating in a spraying or electroplating manner.

6. The battery assembly of claim 5, wherein, The first bus member has a first side surface facing the hollowed-out region, and the insulating coating is arranged on the first side surface, the area of the insulating coating being greater than or equal to the area of the hollowed-out region and less than or equal to the area of the first side surface. The first insulating member has a second side surface facing the hollowed-out region, and the insulating coating is arranged on the second side surface, the area of the insulating coating being greater than or equal to the area of the hollowed-out region and less than or equal to the area of the second side surface.

7. The battery assembly of claim 5 or 6, wherein, The insulating coating comprises at least one of an organic compound and an inorganic compound.

8. The battery assembly of claim 7, wherein, The inorganic compound comprises at least one of silicon dioxide, magnesium oxide, aluminum oxide, calcium oxide, and titanium dioxide. The organic compound comprises at least one of polytetrafluoroethylene, polyimide, polyaniline, polyether ether ketone, and perfluorooctane sulfonic acid.

9. The battery assembly of any one of claims 1 to 8, wherein, The second insulating member is a plate-shaped member, and the second insulating member is arranged on at least one of the first bus member and the first insulating member.

10. The battery assembly of claim 9, wherein, The first bus member is provided with the second insulating member, and the connection between the first bus member and the second insulating member comprises bonding, clamping, or connection through a connecting member. The first insulating member is provided with the second insulating member, and the connection between the first insulating member and the second insulating member comprises bonding, clamping, or connection through a connecting member.

11. The battery assembly of claim 9 or 10, wherein, The second insulating member comprises a mica plate, a mica paper, a ceramic sheet, or a ceramic composite tape.

12. The battery assembly of any one of claims 9 to 11, wherein, The first bus member has a first side surface facing the hollowed-out region, and the second insulating member is arranged on the first side surface, the area of the second insulating member being greater than or equal to the area of the hollowed-out region and less than or equal to the area of the first side surface. And / or, the first insulation piece has a second side facing the hollowed-out area, and the second side is provided with the second insulation piece, the area of the second insulation piece is greater than or equal to the area of the hollowed-out area, and less than or equal to the area of the second side.

13. The battery assembly of any one of claims 1 to 12, wherein, The battery assembly further comprises a circuit member, which is electrically connected with the signal sampling member.

14. The battery assembly of claim 13, wherein, The circuit member comprises a flexible circuit board. And / or the signal sampling member comprises a temperature signal sampling member.

15. The battery assembly of any one of claims 1 to 14, wherein, The battery monomer comprises a pressure relief mechanism, which is arranged on the side of the battery monomer facing the first busbar, and the first busbar has a first projection on the battery monomer, and the first projection is arranged away from the pressure relief mechanism.

16. The battery assembly of claim 15, wherein, The battery assembly further comprises a second busbar, the second busbar is connected with two different battery monomers respectively, the second busbar spans N battery monomers, N is greater than or equal to zero, and M is greater than N.

17. The battery assembly of claim 16, wherein, The second busbar is arranged on the same side of the battery monomer as the first busbar, and the second busbar is insulated from the first busbar.

18. The battery assembly of claim 16 or 17, wherein, The second busbar has a second projection on the battery monomer, and the second projection is arranged away from the pressure relief mechanism.

19. A battery, wherein, The battery comprises the battery assembly according to any one of claims 1 to 18.

20. An electrical device, comprising: The electric device comprises the battery according to claim 19.

Images