Battery assembly, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery assembly, a battery and electric equipment.The battery assembly comprises a plurality of single batteries, at least one signal sampling piece, a first confluence piece and a second insulating piece, each single battery comprises a first insulating piece, and all the first insulating pieces are located on the same side of the single batteries; the first insulating parts are arranged on the outer surfaces of the battery monomers and are provided with hollow areas, the signal sampling parts penetrate through the hollow areas to be connected with the battery monomers, the first convergence parts are arranged on the sides, provided with the first insulating parts, of the plurality of battery monomers, are electrically connected with two different battery monomers respectively, and cross M battery monomers, and M is a positive integer greater than or equal to 1. M is greater than or equal to zero, and the hollow area where the signal sampling piece does not penetrate is shielded by the second insulating piece, so that the first bus piece is insulated from the battery monomer in the position of the hollow area, the problem of short circuit caused by lap joint of the first bus piece and the battery monomer in the hollow area is reduced, and the safety performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery assembly, a battery and an electrical device. Background Art

[0002] With the development of new energy, more and more fields use new energy as power. Due to the advantages of high energy density, rechargeable, safe and environmentally friendly, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0003] A battery includes a plurality of battery cells, a plurality of busbars and a signal sampling member. The plurality of busbars connect the plurality of battery cells in series and / or in parallel. The battery cell is a metal housing, and an insulating film is provided on the outer side of the metal housing. The signal sampling member is connected to the metal housing of the battery cell through a hollowed-out area on the insulating film to achieve signal sampling. However, the busbar is prone to short-circuit with the battery cell in the hollowed-out area of the insulating film where the signal sampling member is not penetrated. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a battery assembly, a battery and an electrical device, which solves the problem that the busbar is prone to short-circuit with the battery cell in the hollowed-out area of the insulating film where the signal sampling member is not penetrated.

[0005] A first aspect of the present application provides a battery assembly, which includes:

[0006] A plurality of battery cells, each battery cell includes a first insulating member, all the first insulating members are located on the same side of the plurality of battery cells, and the first insulating member is provided on the outer surface of the battery cell and has a hollowed-out area;

[0007] At least one signal sampling member, and the signal sampling member passes through the hollowed-out area and is connected to the battery cell;

[0008] A first busbar, the first busbar is arranged on the side of the plurality of battery cells where the first insulating member is provided, the first busbar is electrically connected to two different battery cells respectively, and the first busbar spans M battery cells, where M is greater than or equal to zero;

[0009] A second insulating member, the hollowed-out area where the signal sampling member is not penetrated is blocked by the second insulating member, so that the position of the first busbar in the hollowed-out area is insulated from the battery cell.

[0010] Specifically, the signal sampling member passes through the hollowed-out area on the first insulator and is connected to the battery cell to achieve signal sampling of the battery cell. The second insulator is used to block the hollowed-out area of the first insulator of the battery cell through which the signal sampling member is not passed, 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 with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0011] In some embodiments of the present application, the melting point of the second insulator is greater than or equal to 300 degrees Celsius. By setting the melting point of the second insulator, the situation where the pressure-relieving substance of the battery cell melts the second insulator when the battery cell undergoes thermal runaway is reduced, further improving the insulation performance between the first busbar and the battery cell in the hollowed-out area and further improving the safety performance of the battery assembly.

[0012] In some embodiments of the present application, the second insulator has a projection area on the first insulator, and the hollowed-out area is within the range of the projection area. By setting the hollowed-out area within the range of the projection area, the second insulator can fully block the hollowed-out area through which the signal sampling member is not passed, improving the blocking effect on the hollowed-out area, further improving the insulation performance between the first busbar and the battery cell in the hollowed-out area, and further improving the safety performance of the battery assembly.

[0013] In some embodiments of the present application, along the direction from the first insulator to the first busbar, the size of the second insulator is greater than or equal to 0.01 mm and less than or equal to 5 mm. By setting the size of the second insulator in the direction from the first insulator to the first busbar, the second insulator has sufficient size, reducing the situation where the pressure-relieving substance ejected when the battery cell undergoes thermal runaway melts the second insulator, further reducing the short-circuit problem caused by the first busbar overlapping with the battery cell in the hollowed-out area, and improving the safety performance of the battery assembly.

[0014] In some embodiments of the present application, the second insulator includes an insulating coating, and the insulating coating is provided on the first busbar and / or the first insulator by spraying or electroplating. The second insulator is set as an insulating coating provided on the first busbar and / or the first insulator by spraying or electroplating, so as to increase the fixing strength and stability of the second insulator, and thus better block the hollowed-out area of the first insulator of the battery cell through which the signal sampling member is not passed, making the battery cell and the first busbar insulated from each other, thereby reducing the short-circuit problem caused by the first busbar overlapping with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0015] In some embodiments of the present application, the first busbar member has a first side facing the hollowed-out area, and an insulating coating is provided on the first side. 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. By setting the area of the insulating coating on the first side, the insulating coating can have an area sufficient to block the first insulating hollowed-out area of the battery cell that does not have the signal sampling member passed through, improving the shielding effect on the hollowed-out area, insulating the battery cell and the first busbar member, thereby reducing the short-circuit problem caused by the first busbar member lapping with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0016] In some embodiments of the present application, the first insulating member has a second side facing the hollowed-out area, and an insulating coating is provided on the second side. 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. By setting the area of the insulating coating on the second side, the insulating coating can have an area sufficient to block the first insulating hollowed-out area of the battery cell that does not have the signal sampling member passed through, improving the shielding effect on the hollowed-out area, insulating the battery cell and the first busbar member, thereby reducing the short-circuit problem caused by the first busbar member lapping with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0017] In some embodiments of the present application, the second insulating member is a plate-shaped member, and the second insulating member is provided on at least one of the first busbar member and the first insulating member. Setting the second insulating member as a plate-shaped member enables the second insulating member to have a certain structural strength, thereby being able to improve the shielding of the hollowed-out area of the first insulating member of the battery cell that does not have the signal sampling member passed through, insulating the battery cell and the first busbar member, thereby reducing the short-circuit problem caused by the first busbar member lapping with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0018] In some embodiments of the present application, a second insulating member is provided on the first busbar member, and the connection manner between the first busbar member and the second insulating member includes bonding, clamping, or connection through a connecting member. By providing the second insulating member on the first busbar member, the second insulating member can be first assembled onto the first busbar member, and then the first busbar member can be assembled onto the battery assembly, thereby improving the assembly convenience and increasing the assembly efficiency.

[0019] In some embodiments of the present application, a second insulating member is provided on the first insulating member, and the connection manner between the first insulating member and the second insulating member includes bonding, clamping, or connection through a connecting member. By providing the second insulating member on the first insulating member, the second insulating member can be first assembled onto the first insulating member, improving the assembly accuracy of the second insulating member and reducing the occurrence of the situation where the insulation performance between the first busbar member and the battery cell is reduced due to the offset of the second insulating member.

[0020] In some embodiments of the present application, the second insulating member includes a mica plate, mica paper, a ceramic sheet, or a ceramic composite tape. By setting the second insulating member, it is convenient to select materials for the second insulating member as needed, thereby improving the flexibility of setting the second insulating member.

[0021] In some embodiments of the present application, the first bus member has a first side facing the hollowed-out area, and a second insulating member is provided on the first side. The area of the second insulating member 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. By setting the area of the second insulating member on the first side, the second insulating member can have an area sufficient to block the first insulating hollowed-out area of the battery cell where the signal sampling member is not penetrated, improving the blocking effect on the hollowed-out area, insulating the battery cell and the first bus member, thereby reducing the short-circuit problem caused by the first bus member lapping with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0022] In some embodiments of the present application, the first insulating member has a second side facing the hollowed-out area, and a second insulating member is provided on the second side. The area of the second insulating member 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. By setting the area of the second insulating member on the second side, the second insulating member can have an area sufficient to block the first insulating hollowed-out area of the battery cell where the signal sampling member is not penetrated, improving the blocking effect on the hollowed-out area, insulating the battery cell and the first bus member, thereby reducing the short-circuit problem caused by the first bus member lapping with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0023] In some embodiments of the present application, the battery assembly further includes a circuit component, and the circuit component is electrically connected to the signal sampling member. By providing the circuit component and electrically connecting the circuit component to the signal sampling member, the sampling signal of the signal sampling member can be transmitted, effectively realizing the signal sampling and monitoring of the battery assembly.

[0024] In some embodiments of the present application, the circuit component includes a flexible circuit board. By setting the circuit component as a flexible circuit board, the volume of the circuit component can be reduced, and thus the battery assembly can be made more compact.

[0025] In some embodiments of the present application, the signal sampling member includes a temperature signal sampling member. The temperature signal sampling member is connected to the battery cell after passing through the hollowed-out area of the first insulating member, so that the temperature of the battery cell can be detected, and thus the temperature sampling requirement of the battery assembly is met.

[0026] In some embodiments of the present application, the battery cell includes a pressure relief mechanism, which is arranged on the side of the battery cell facing the first busbar, and the first busbar has a first projection on the battery cell, and the first projection is staggered with the pressure relief mechanism. The first projection of the first busbar is staggered with the pressure relief mechanism, thereby reducing the obstruction of the first busbar to the pressure relief mechanism, so that the pressure relief mechanism can be opened smoothly, further improving the safety performance of the battery assembly.

[0027] In some embodiments of the present application, the battery assembly further includes a second busbar, the second busbar is respectively connected to two different battery cells, the second busbar spans N battery cells, N is greater than or equal to zero, and M is greater than N. The second busbar is provided and combined with the first busbar, so that flexible electrical connection between multiple battery cells can be achieved.

[0028] In some embodiments of the present application, the second busbar and the first busbar are arranged side by side on the same side of the battery cell, and the second busbar is insulated from the first busbar. By isolating the first busbar from the second busbar, the possibility of a short circuit between the first busbar and the second busbar is reduced, so that the safety performance of the battery is further improved.

[0029] In some embodiments of the present application, the second busbar has a second projection on the battery cell, and the second projection is staggered with the pressure relief mechanism. The second projection of the second busbar is staggered with the pressure relief mechanism, thereby reducing the obstruction of the second busbar to the pressure relief mechanism, so that the pressure relief mechanism can be opened smoothly, further improving the safety performance of the battery assembly.

[0030] A second aspect of the present application provides a battery, comprising the battery assembly as described above.

[0031] Specifically, the signal sampling member of the battery assembly passes through the hollow area on the first insulation and is connected to the battery cell to achieve signal sampling of the battery cell. The second insulation member is used to shield the hollow area of ​​the first insulation of the battery cell where the signal sampling member is not passed through, so that the battery cell and the first current collector are insulated, thereby reducing the short circuit problem caused by the overlap of the first current collector and the battery cell in the hollow area, and improving the safety performance of the battery assembly.

[0032] A third aspect of the present application is an electrical device, the electrical device comprising a battery as described above.

[0033] Specifically, in the battery, the signal sampling component of the battery assembly passes through the hollowed-out area on the first insulator and is connected to the battery cell to achieve signal sampling of the battery cell. The second insulator is used to block the hollowed-out area of the first insulator of the battery cell through which the signal sampling component is not passed, so that the battery cell and the first bus bar are insulated from each other, thereby reducing the short-circuit problem caused by the first bus bar lapping with the battery cell in the hollowed-out area and improving the safety performance of the battery assembly.

[0034] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematically shows a structural diagram of a vehicle according to an embodiment of the present application;

[0036] Figure 2 Schematically shows a structural diagram of a battery according to an embodiment of the present application;

[0037] Figure 3 Schematically shows a structural diagram of a battery assembly according to an embodiment of the present application;

[0038] Figure 4 For Figure 3 the exploded structural diagram of the battery assembly shown in;

[0039] Figure 5 For Figure 3 a partial structural diagram of the battery assembly shown in, in which the bus bar is removed;

[0040] Figure 6 Schematically shows a structural diagram of a battery assembly according to another embodiment of the present application;

[0041] Figure 7 For Figure 6 the exploded structural diagram of the battery assembly shown in;

[0042] Figure 8 For Figure 6 a partial structural diagram of the battery assembly shown in, in which the bus bar is removed;

[0043] Figure 9 Schematically shows a cross-sectional view of a battery assembly according to still another embodiment of the present application;

[0044] Figure 10 For Figure 9 the enlarged structural diagram of part A in the structure shown in;

[0045] Figure 11 Schematically shows a cross-sectional view of a battery assembly according to another embodiment of the present application;

[0046] Figure 12 is Figure 11 a schematic enlarged view of part B in the structure shown in

[0047] The reference numerals are as follows:

[0048] 1000, vehicle;

[0049] 100, battery; 200, controller; 300, motor;

[0050] 10, battery assembly;

[0051] 11, battery cell;

[0052] 111, first insulating member; 1111, hollowed-out area; 1112, second side; 112, pressure relief mechanism; 113, electrode terminal;

[0053] 12, signal sampling member;

[0054] 13, first busbar;

[0055] 131, avoidance hole; 132, first side;

[0056] 14, second busbar;

[0057] 15, second insulating member;

[0058] 151, through hole;

[0059] 16, circuit component;

[0060] 20, box body;

[0061] 21, first part; 22, second part;

[0062] a, first direction; b, first dimension. Specific Embodiments

[0063] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims, and above-mentioned drawings of this application are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0066] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0068] In the description of the embodiments of this application, the term "a plurality of" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0069] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0070] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0071] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand is also continuously increasing.

[0072] In the related art, a battery includes a plurality of battery cells, a plurality of bus bars, and a signal sampling member. The plurality of bus bars connect the plurality of battery cells in series and / or in parallel. The battery cell is a metal shell, and an insulating film is provided on the outer side of the metal shell. The signal sampling member is connected to the metal shell of the battery cell through a hollow area on the insulating film to achieve signal sampling. However, the bus bar is prone to short circuit with the battery cell in the hollow area where the signal sampling member is not penetrated through the insulating film.

[0073] In the present application, a battery assembly includes a plurality of battery cells, at least one signal sampling member, a first bus bar, and a second insulating member. Each battery cell includes a first insulating member, and all the first insulating members are located on the same side of the plurality of battery cells. The first insulating member is provided on the outer surface of the battery cell and has a hollow area. The signal sampling member passes through the hollow area and is connected to the battery cell. The first bus bar is arranged on the side of the plurality of battery cells where the first insulating member is provided. The first bus bar is electrically connected to two different battery cells respectively, and the first bus bar spans M battery cells, where M is greater than or equal to zero. The hollow area without the signal sampling member is blocked by the second insulating member, so that the position of the first bus bar in the hollow area is insulated from the battery cell, reducing the short circuit problem caused by the first bus bar overlapping with the battery cell in the hollow area and improving the safety performance.

[0074] The battery involved in the embodiments of the present application can be but is not limited to being used in electrical devices such as vehicles, ships, or aircraft. A power system of the electrical device can be composed of the battery cells, batteries, etc. involved in the present application.

[0075] In the embodiments of the present application, the electrical devices powered by batteries may include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys may include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft may include airplanes, rockets, space shuttles, and spaceships, etc.

[0076] It should be understood that the technical solutions described in the embodiments of the present application are not only applicable to the above-described batteries and electrical devices, but also applicable to all batteries including boxes and electrical devices using batteries. However, for the sake of simplicity of description, the following embodiments will be described by taking electric vehicles as examples.

[0077] Please refer to Figure 1 , Figure 1 FIG. 1000 is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery 100 is disposed inside the vehicle 1000. The battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to supply power to the vehicle 1000. For example, the battery 100 may serve as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0078] In some embodiments of the present application, the battery 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Figure 2 FIG. 17 shows a schematic structural diagram of a battery 100 according to an embodiment of the present application. To meet different power usage requirements, the battery 100 may include a plurality of battery components 10. The plurality of battery components may be connected in series, in parallel, or in a series-parallel combination (series-parallel combination means a combination of series and parallel) and disposed in a box 20 to form the battery 100.

[0080] Among them, the box body 20 is used to provide an accommodation space for the battery assembly 10, and the box body 20 can adopt various structures. In some embodiments, the box body 20 may include a first part 21 and a second part 22. The first part 21 and the second part 22 are covered with each other, and the first part 21 and the second part 22 jointly define an accommodation space for accommodating the battery assembly 10. The second part 22 may be a hollow structure with an open end, and the first part 21 may be a plate-like structure. The first part 21 is covered on the open side of the second part 22 so that the first part 21 and the second part 22 jointly define an accommodation space; the first part 21 and the second part 22 may also both be hollow structures with an open side, and the open side of the first part 21 is covered on the open side of the second part 22. Of course, the box body 20 formed by the first part 21 and the second part 22 may be of various shapes, such as a cylinder, a cuboid, etc. In addition, the material of the box body 20 may be alloy materials such as aluminum alloy and ferroalloy, or polymer materials such as polycarbonate and polyisocyanurate foam plastic, or composite materials such as glass fiber reinforced epoxy resin, and the embodiments of the present application are not limited thereto either.

[0081] As Figure 3 shown, in the present application, the battery assembly 10 includes a plurality of battery cells 11 and a plurality of bus bars. The battery cell 11 refers to the smallest unit that makes up the battery assembly 10. The plurality of battery cells 11 can be connected in series, in parallel, or in a hybrid connection (a hybrid connection means that there are both series and parallel connections among the plurality of battery cells 11) to form the battery assembly 10. The bus bar is a component that can connect a plurality of battery cells 11 in series or in parallel to achieve electrical connection among the plurality of battery cells 11. The bus bar can also be called a bus bar, a tab, or a bus bar, and is generally a metal sheet that can be welded to the electrode terminal 113 of the battery cell 11 to connect the plurality of battery cells 11 in series or in parallel. The plurality of battery cells 11 can be directly connected in series, in parallel, or in a hybrid connection through the bus bar assembly. Each battery cell 11 can be a secondary battery 100 or a primary battery 100; it 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 cell 11 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0082] Inside the battery cell 11, one or more cell components may be included. The cell components are the parts in the battery cell 11 where electrochemical reactions occur. The connecting tab is the part in the battery cell 11 that conducts current. The cell components are mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and a separator is usually provided between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate with active materials constitute the main body of the cell components. The parts of the positive electrode plate and the negative electrode plate without active materials are each provided with an electrode tab. The positive electrode tab and the negative electrode tab may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging processes of the battery 100, the positive active material and the negative active material react with the electrolyte, and the connecting tab is connected between the electrode tab and the electrode terminal 113 to form an electric current loop.

[0083] In some embodiments, functional components such as the electrode terminal 113 may be provided on the battery cell 11. The electrode terminal 113 can be used to electrically connect the cell components and the bus bar for outputting or inputting the electrical energy of the battery cell 11. In some embodiments, the battery cell 11 may further 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. This threshold design varies according to different design requirements. The threshold value may depend on one or several materials among the positive electrode plate, the negative electrode plate, the electrolyte, and the separator in the battery cell. The pressure relief mechanism 112 can be in the form of, for example, an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve.

[0084] In some embodiments of the present application, as Figures 3 to 12 shown, a battery assembly 10 is proposed. The battery assembly 10 includes a plurality of battery cells 11, at least one signal sampling member 12, a first bus bar 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 provided on the outer surface of the battery cell 11 and has a hollowed-out area 1111. The signal sampling member 12 passes through the hollowed-out area 1111 and is connected to the battery cell 11. The first bus bar 13 is arranged on the side of the plurality of battery cells 11 where the first insulating members 111 are provided. The first bus bar 13 is electrically connected to two different battery cells 11 respectively, and the first bus bar 13 spans M battery cells 11, where M is greater than or equal to zero. The hollowed-out area 1111 without the signal sampling member 12 is blocked by the second insulating member 15 so that the first bus bar 13 is insulated from the battery cell 11 at the position of the hollowed-out area 1111.

[0085] Specifically, taking the structure of the battery cell 11 as a cuboid as an example, a plurality of battery cells 11 are arranged in a preset direction, which is the length direction or the width direction of the battery cell 11. Among them, the first busbar 13 electrically connects two spaced-apart battery cells 11, and at least one battery cell 11 is arranged between the two spaced-apart battery cells 11, and this at least one battery cell 11 is the battery cell 11 spanned by the first busbar 13.

[0086] The first busbar 13 spans M battery cells 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 cell 11.

[0087] Each battery cell 11 is provided with a first insulating member 111. Among the plurality of battery cells 11, the sides of each battery cell 11 provided with the first insulating member 111 all face the same side of the plurality of battery cells 11. The signal sampling member 12 and the first busbar 13 are both arranged on the side of the battery cell 11 with the first insulating member 111.

[0088] In order to facilitate signal detection of the battery cell 11, a hollowed-out area 1111 is provided on the first insulating member 111. The hollowed-out area 1111 refers to a hole-like structure opened on the first insulating member 111, and this hole-like structure can satisfy the signal sampling member 12 to pass through.

[0089] The number of signal sampling members 12 provided in the battery assembly 10 is less than the number of battery cells 11. After the battery assembly 10 is assembled, the hollowed-out areas 1111 of some battery cells 11 are in an unused state. At this time, the side of the battery cell 11 facing the first busbar 13 is exposed through the hollowed-out area 1111. If the battery cell 11 undergoes thermal runaway, the pressure relief mechanism 112 of the battery cell 11 is opened, and the discharged and ejected substances enter the position of the hollowed-out area 1111 where the signal sampling member 12 is not passed through, which is likely to cause the first busbar 13 and the battery cell 11 to overlap, thereby causing a short circuit between the first busbar 13 and the battery cell 11.

[0090] The signal sampling member 12 passes through the hollowed-out area 1111 on the first insulation and is connected to the battery cell 11 to realize signal sampling of the battery cell 11. The second insulating member 15 shields the hollowed-out area 1111 of the first insulation of the battery cell 11 through which the signal sampling member 12 is not passed through. Among them, shielding means that the second insulating member 15 structurally supplements the hollowed-out area 1111 of the first insulating member 111, so that the battery cell 11 and the first busbar 13 cannot contact through the hollowed-out area 1111.

[0091] In this application, the second insulating member 15 is used to shield the first-insulated hollow area 1111 of the battery cell 11 through which the signal sampling member 12 is not passed, so that the battery cell 11 and the first busbar member 13 are insulated from each other, thereby reducing the short-circuit problem caused by the first busbar member 13 overlapping with the battery cell 11 in the hollow area 1111, and improving the safety performance of the battery module 10.

[0092] It should be noted that, in this application, the first insulating member 111 is a sheet member, which is fixed on the outer surface of the battery cell 11 (such as the top cover of the battery cell 11) by bonding or other means. The first insulating member 111 not only has insulating properties, but also has high-temperature resistance, that is, under certain high-temperature conditions, the first insulating member 111 will not be melted. The first insulating member 111 can be a mica sheet, a ceramic sheet, or the like.

[0093] Furthermore, multiple battery cells 11 are arranged in a preset direction, and the first busbar member 13 is arranged across M battery cells 11, where M can take values such as one, two, three, four, five, six, seven, eight, etc.

[0094] In addition, one end of the first busbar component is electrically connected to the electrode terminal 113 of a battery cell 11 by welding, clamping, or connection through a fastener, and the other end of the first busbar component is electrically connected to the electrode terminal 113 of another battery cell 11 by welding, clamping, or connection through a fastener.

[0095] In addition, the number of the first busbar components can be one, two, three, four, five, six, seven, eight, etc., and at the same time, the number of the second busbar components can also be one, two, three, four, five, six, seven, eight, etc.

[0096] It should be noted that the number of multiple battery cells 11 can be three, four, five, six, seven, eight, etc. At the same time, the number of the signal sampling members 12 is less than the number of the battery cells 11, and specifically can be one, two, three, four, five, six, seven, eight, etc.

[0097] In some embodiments of this application, the melting point of the second insulating member 15 is greater than or equal to 300 degrees Celsius.

[0098] Specifically, the melting point of the second insulating member 15 is set to be greater than or equal to 300 degrees Celsius, so that the second insulating member 15 can have high-temperature resistance performance. When the battery cell 11 undergoes thermal runaway, the possibility that the molten material ejected during thermal runaway melts the second insulating member 15 is reduced, further improving the insulation performance between the first busbar member 13 and the battery cell 11, further reducing the short-circuit situation between the first busbar member 13 and the battery cell 11, and further improving the safety performance of the battery assembly 10.

[0099] It should be noted that in the present application, the melting point of the second insulating member 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.

[0100] In some embodiments of the present application, the second insulating member 15 has a projection area on the first insulating member 111, and the hollow area 1111 is within the range of the projection area.

[0101] Specifically, both the first insulating member 111 and the second insulating member 15 are disposed between the battery cell 11 and the first busbar member 13. In the direction from the first busbar member 13 to the battery cell 11, the second insulating member 15 can form a projection area on the first insulating member 111, and the hollow area 1111 on the first insulating member 111 is within the range of the projection area. Herein, the hollow area 1111 being within the range of the projection area means that the entire hollow area 1111 is disposed within the projection area, and the edge of the hollow area 1111 does not exceed the edge of the projection area.

[0102] In the present application, by disposing the hollow area 1111 within the range of the projection area, the second insulating member 15 can fully block the hollow area 1111 where the signal sampling member 12 is not penetrated, improving the blocking effect on the hollow area 1111, further improving the insulation performance between the first busbar member 13 in the hollow area 1111 and the battery cell 11, and further improving the safety performance of the battery assembly 10.

[0103] It should be noted that in the present application, the shape of the hollow area 1111 includes but is not limited to a circle, an ellipse, a triangle, a quadrilateral, a pentagon, a hexagon, etc. At the same time, the shape of the projection area includes but is not limited to a circle, an ellipse, a triangle, a quadrilateral, a pentagon, a hexagon, etc.

[0104] In addition, the shape of the projection area may be the same as or different from the shape of the hollowed-out area 1111. When the shape of the projection area is the same as the shape of the hollowed-out area 1111, the area of the projection area is greater than or equal to the area of the hollowed-out area 1111. When the shape of the projection area is different from the shape of the hollowed-out area 1111, the area of the projection area is greater than the area of the hollowed-out area 1111.

[0105] In some embodiments of the present application, along the direction from the first insulating member 111 to the first bus bar member 13, the size of the second insulating member 15 is greater than or equal to 0.01 mm and less than or equal to 5 mm.

[0106] Specifically, as Figure 10 or Figure 12 shown, in Figure 10 or Figure 12 the first direction a is consistent with the direction from the first insulating member 111 to the first bus bar member 13. In the first direction a, the size of the second insulating member 15 is the first size b, where 0.01 mm ≤ b ≤ 5 mm.

[0107] 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 bar member 13, the second insulating member 15 has a sufficient size, reducing the situation where the pressure relief material ejected when the battery cell 11 undergoes thermal runaway melts the second insulating member 15, and further reducing the short-circuit problem that occurs when the first bus bar member 13 overlaps with the battery cell 11 in the hollowed-out area 1111, improving the safety performance of the battery assembly 10.

[0108] 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, 5 mm.

[0109] In some embodiments of the present application, the second insulating member 15 includes an insulating coating. During implementation, the insulating coating can be provided only on the first bus bar member 13, or only on the first insulating member 111, or on both the first bus bar member 13 and the first insulating member 111.

[0110] As Figure 9 and Figure 10 shown, the second insulating member 15 which is the insulating coating is provided on the first insulating member 111. The second insulating member 15 shields the hollowed-out area 1111 on the first insulating member 111 where the signal sampling member 12 is not penetrated, so that the first bus bar member 13 and the battery cell 11 are insulated at the position of the hollowed-out area 1111.

[0111] As Figure 11 and Figure 12 ​As shown, the second insulating member 15 of the insulating coating is disposed on the first bus member 13. The second insulating member 15 is disposed opposite to the hollowed-out area 1111 of the first insulating member 111 where the signal sampling member 12 is not passed through and forms an occlusion of the hollowed-out area 1111, so that the first bus member 13 and the battery cell 11 are insulated at the position of the hollowed-out area 1111.

[0112] In addition, the second insulating member 15 of the insulating coating can be disposed by spraying or electroplating. The second insulating member 15 is disposed as an insulating coating on at least one of the first bus member 13 and the first insulating member 111 by spraying or electroplating, so as to increase the fixing strength and stability of the second insulating member 15, and thus can better occlude the hollowed-out area 1111 of the first insulating member 111 of the battery cell 11 where the signal sampling member 12 is not passed through, so that the battery cell 11 and the first bus member 13 are insulated from each other, thereby reducing the short-circuit problem caused by the first bus member 13 overlapping with the battery cell 11 in the hollowed-out area 1111, and improving the safety performance of the battery assembly 10.

[0113] In some embodiments of the present application, the first bus member 13 has a first side surface 132 facing the hollowed-out area 1111, and an insulating coating is provided on the first side surface 132. The area of the insulating coating 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.

[0114] Specifically, by setting the area of the insulating coating on the first side surface 132, the insulating coating can have an area sufficient to occlude the hollowed-out area 1111 of the first insulation of the battery cell 11 where the signal sampling member 12 is not passed through, improving the occlusion effect on the hollowed-out area 1111, so that the battery cell 11 and the first bus member 13 are insulated from each other, thereby reducing the short-circuit problem caused by the first bus member 13 overlapping with the battery cell 11 in the hollowed-out area 1111, and improving the safety performance of the battery assembly 10.

[0115] In some embodiments of the present application, the first insulating member 111 has a second side surface facing the hollowed-out area 1111, and an insulating coating is provided on the second side surface. The area of the insulating coating 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.

[0116] Specifically, by setting the area of the insulating coating on the second side surface, the insulating coating can have an area sufficient to block the first insulating hollow area 1111 of the battery cell 11 where the signal sampling member 12 is not penetrated, improving the blocking effect on the hollow area 1111, insulating the battery cell 11 from the first bus bar 13, thereby reducing the short - circuit problem caused by the overlap of the first bus bar 13 and the battery cell 11 in the hollow area 1111, and improving the safety performance of the battery assembly 10.

[0117] It should be understood that when the insulating coating is provided on the first insulating member 111 by spraying or electroplating, the insulating coating structurally supplements the hollow area 1111. At this time, the insulating coating that supplements the hollow area 1111 can be connected to the surface of the battery cell 11 facing the hollow area 1111.

[0118] In some embodiments of the present application, the insulating coating includes at least one of an organic compound and an inorganic compound.

[0119] Specifically, the composition material of the insulating coating may include one or more materials. When the insulating coating includes only one material, the one material may be an organic compound or an inorganic compound; when the insulating coating includes multiple materials, the multiple materials include an organic compound and an inorganic compound.

[0120] In the present application, by setting the insulating coating, it is convenient to select materials for the insulating coating according to needs, thereby improving the flexibility of setting the insulating coating.

[0121] In some embodiments of the present application, the inorganic compound includes at least one of silicon dioxide, magnesium oxide, aluminum oxide, calcium oxide, and titanium dioxide.

[0122] Specifically, by setting the non - metal oxide, on the basis of enabling the insulating coating to have good insulation and temperature resistance performance, the cost can be effectively reduced.

[0123] In some embodiments of the present application, the organic compound includes at least one of polytetrafluoroethylene, polyimide, polyaniline, polyether ether ketone, and perfluorooctanesulfonic acid.

[0124] Specifically, by setting the organic compound, on the basis of enabling the insulating coating to have good insulation and temperature resistance performance, the cost can be effectively reduced.

[0125] In some embodiments of the present application, as Figure 4 or Figure 7 shown, 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 bar 13 and the first insulating member 111.

[0126] Specifically, the second insulating member 15 has various implementation manners. For example, the second insulating member 15 can be provided only on the first bus member 13, or can be provided only on the first insulating member 111, or can be provided on both the first bus member 13 and the first insulating member 111. Thus, the second insulating member 15 can be set as needed, improving the flexibility of the layout and installation of the second insulating member 15.

[0127] In addition, the second insulating member 15 is set as a plate-like member with a certain thickness, so that the second insulating member 15 has a certain structural strength, thereby being able to improve the shielding of the hollowed-out area 1111 of the first insulating member 111 of the battery cell 11 where the signal sampling member 12 is not passed through, insulating the battery cell 11 from the first bus member 13, thus reducing the short-circuit problem caused by the first bus member 13 lapping with the battery cell 11 in the hollowed-out area 1111 and improving the safety performance of the battery assembly 10.

[0128] It should be noted that in this application, the second insulating member 15 can be of an integral structure or a split structure.

[0129] For example, as Figure 4 shown, Figure 4 in, the second insulating member 15 is of an integral structure, that is, one second insulating member 15 is used to shield the hollowed-out areas 1111 of multiple battery cells 11 where the signal sampling member 12 is not passed through, and the second insulating member 15 is provided with a through hole 151 at the position corresponding to where the signal sampling member 12 is passed through, so that the signal sampling member 12 can pass through. Setting the second insulating member 15 as an integral structure improves the convenience of assembly and effectively enhances the production efficiency.

[0130] For example, as Figure 7 shown, Figure 7 in, the second insulating member 15 is of a split structure, that is, each hollowed-out area 1111 where the signal sampling member 12 is not passed through is shielded by a part of the second insulating member 15. Setting the second insulating member 15 as a split structure can reduce the usage amount of the second insulating member 15, thereby effectively reducing the manufacturing cost.

[0131] In some implementation manners of this application, the second insulating member 15 is provided on the first bus member 13, and the connection manner between the first bus member 13 and the second insulating member 15 includes bonding, snap connection, or connection through a connecting member.

[0132] Specifically, by disposing the second insulating member 15 on the first current collecting member 13, the second insulating member 15 can be first assembled onto the first current collecting member 13, and then the first current collecting member 13 can be assembled onto the battery assembly 10, thereby improving the convenience of assembly and enhancing the assembly efficiency.

[0133] For example, the connection manner between the first current collecting member 13 and the second insulating member 15 is bonding, that is, the first current collecting member 13 and the second insulating member 15 are bonded and fixed by using an adhesive.

[0134] For example, the connection manner between the first current collecting member 13 and the second insulating member 15 is snap connection, that is, a card slot is provided on the first current collecting member 13, and the second insulating member 15 is embedded into the card slot and is snap-connected and fixed to the side wall of the card slot.

[0135] For example, the connection manner between the first current collecting member 13 and the second insulating member 15 is connection through a connecting member, that is, the first current collecting member 13 and the second insulating member 15 are connected and fixed by screws (insulating material).

[0136] In some embodiments of the present application, the second insulating member 15 is provided on the first insulating member 111, and the connection manner between the first insulating member 111 and the second insulating member 15 includes bonding, snap connection or connection through a connecting member.

[0137] Specifically, by disposing the second insulating member 15 on the first insulating member 111, the second insulating member 15 can be first assembled onto the first insulating member 111, improving the assembly accuracy of the second insulating member 15 and reducing the occurrence of the situation where the insulation performance between the first current collecting member 13 and the battery cell 11 is reduced due to the offset of the second insulating member 15.

[0138] For example, the connection manner between the first insulating member 111 and the second insulating member 15 is bonding, that is, the second insulating member 15 provided on the first insulating member 111 is bonded and fixed by using an adhesive.

[0139] For example, the connection manner between the first insulating member 111 and the second insulating member 15 is snap connection, that is, a card slot is provided on the first insulating member 111, and the second insulating member 15 is embedded into the card slot and is snap-connected and fixed to the side wall of the card slot.

[0140] For example, the connection manner between the first insulating member 111 and the second insulating member 15 is connection through a connecting member, that is, the first insulating member 111 and the second insulating member 15 are connected and fixed by screws (insulating material).

[0141] In some embodiments of the present application, the second insulating member 15 includes a mica plate, mica paper, a ceramic sheet or a ceramic composite tape.

[0142] Specifically, by setting the second insulating member 15, it is convenient to select materials for the second insulating member 15 as needed, thereby improving the flexibility of setting the second insulating member 15.

[0143] In some embodiments of the present application, the first bus member 13 has a first side surface 132 facing the hollowed-out area 1111, and a second insulating member 15 is provided 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.

[0144] 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 block the first insulating hollowed-out area 1111 of the battery cell 11 where the signal sampling member 12 is not passed through, improving the blocking effect on the hollowed-out area 1111, insulating the battery cell 11 and the first bus member 13, thereby reducing the short-circuit problem caused by the first bus member 13 overlapping with the battery cell 11 in the hollowed-out area 1111, and improving the safety performance of the battery assembly 10.

[0145] In some embodiments of the present application, the first insulating member 111 has a second side surface facing the hollowed-out area 1111, and a second insulating member 15 is provided 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.

[0146] 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 block the first insulating hollowed-out area 1111 of the battery cell 11 where the signal sampling member 12 is not passed through, improving the blocking effect on the hollowed-out area 1111, insulating the battery cell 11 and the first bus member 13, thereby reducing the short-circuit problem caused by the first bus member 13 overlapping with the battery cell 11 in the hollowed-out area 1111, and improving the safety performance of the battery assembly 10.

[0147] In some embodiments of the present application, as Figures 3 to 5 or Figures 6 to 8 shown, the battery assembly 10 further includes a circuit member 16, and the circuit member 16 is electrically connected to the signal sampling member 12. By providing the circuit member 16 and electrically connecting the circuit member 16 to the signal sampling member 12, the sampling signal of the signal sampling member 12 can be transmitted, effectively realizing signal sampling and monitoring of the battery assembly 10.

[0148] In some embodiments of the present application, the circuit member 16 includes a flexible circuit board.

[0149] Specifically, a flexible circuit board is a printed circuit board made of polyimide or polyester film as a substrate, which has high reliability and excellent flexibility. It has the characteristics of high wiring density, light weight, thin thickness and good bendability.

[0150] In the present application, the circuit component 16 is configured as a flexible circuit board, so that the volume of the circuit component 16 can be reduced, thereby making the battery assembly 10 more compact.

[0151] In some embodiments of the present application, the signal sampling component 12 includes a temperature signal sampling component.

[0152] Specifically, the temperature signal sampling component passes through the hollow area 1111 of the first insulating component 111 and is connected to the battery cell 11 , so that the temperature of the battery cell 11 can be detected, thereby meeting the temperature sampling requirements of the battery assembly 10 .

[0153] In addition, in the present application, a avoidance hole 131 is provided on the first current collector 13, and the temperature sampling component is connected to the battery cell 11 after passing through the avoidance hole 131 and the hollow area 1111. The avoidance hole 131 is provided to facilitate the temperature sampling component to be installed through the first current collector 13 (the temperature sampling component and the avoidance hole 131 are insulated), so that the overall structure of the battery assembly 10 is more compact.

[0154] It should be noted that the temperature sampling member is in contact with the battery cell 11 through a thermal pad. The thermal pad is disposed between the temperature sampling member and the battery cell 11, and is used to transfer the temperature of the battery cell 11 to the temperature sampling member, thereby achieving heat conduction between the temperature sampling member and the battery cell 11. The thermal pad and the temperature sampling member may be connected by gluing or other methods. The gluing method may be achieved by applying a thermally conductive adhesive between the thermal pad and the temperature sampling member.

[0155] The thermal pad has a high thermal conductivity, high thermal efficiency, good compression performance, and strong pressure bearing performance, and can withstand the expansion and deformation of the module EOL (End of Life, i.e., the end of the production line) and the extrusion during impact and vibration. Therefore, making the temperature sampling piece contact with the battery cell 11 through the thermal pad can not only achieve a more efficient temperature sampling process, but also help to improve the contact adequacy between the temperature sampling piece and the battery cell 11.

[0156] In some embodiments of the present application, Figure 4 or Figure 7 As shown, the battery cell 11 includes a pressure relief mechanism 112 , which is disposed on the side of the battery cell 11 facing the first current collector 13 . The first current collector 13 has a first projection on the battery cell 11 , which is staggered with the pressure relief mechanism 112 .

[0157] Specifically, the first busbar 13 is a metal part, and the melting point of the metal part is greater than the temperature of the high-temperature material ejected when the pressure relief mechanism 112 is opened. If there is an overlapping area 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 component of the pressure relief mechanism 112 and the first busbar 13, and a short circuit will occur when the opening component is opened.

[0158] In the present application, the first projection of the first busbar 13 is staggered with the pressure relief mechanism 112 , thereby reducing the obstruction of the first busbar 13 to the pressure relief mechanism 112 , so that the pressure relief mechanism 112 can be opened smoothly, further improving the safety performance of the battery assembly 10 .

[0159] At the same time, the first projection of the first busbar 13 is staggered with the pressure relief mechanism 112 so that the first busbar 13 avoids the pressure relief mechanism 112. This can reduce the short circuit between the pressure relief mechanism 112 and the first busbar 13 after it is turned on, thereby improving the safety performance of the battery assembly 10.

[0160] It should be understood that when the first projection and the pressure relief mechanism 112 are staggered, there is no overlapping area between the first projection and the pressure relief mechanism 112 .

[0161] In some embodiments of the present application, Figures 3 to 4 ,or Figures 6 to 7 As shown, the battery assembly 10 further includes a second busbar 14 , which is connected to two different battery cells 11 respectively. The second busbar 14 spans N battery cells 11 , where N is greater than or equal to zero, and M is greater than N.

[0162] Specifically, among the multiple battery cells 11 of the battery assembly 10, the multiple battery cells 11 are arranged in a preset direction, the first bus 13 connects two battery cells 11, and the second bus 14 connects the other two battery cells 11. There are M battery cells 11 between the two battery cells 11 connected to the first bus 13, M is greater than zero, and there are N battery cells 11 between the two battery cells 11 connected to the second bus 14, N is greater than or equal to zero, and M is greater than N.

[0163] The second busbar 14 is provided and combined with the first busbar 13 , so that flexible electrical connection between the plurality of battery cells 11 can be achieved.

[0164] 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., and the number of first busbars 13 can also be one, two, three, four, five, six, seven, etc.

[0165] In some embodiments of the present application,Figures 3 to 4 ,or Figures 6 to 7 As shown, the second current bus 14 and the first current bus 13 are arranged side by side on the same side of the battery cell 11 , and the second current bus 14 and the first current bus 13 are insulated from each other.

[0166] Specifically, the second current collector 14 and the first current collector 13 are arranged side by side on the same side of the battery cell 11 , which can improve the convenience during the assembly process, thereby effectively improving the assembly efficiency of the battery assembly 10 .

[0167] In addition, by insulating the first busbar 13 and the second busbar 14 , the possibility of a short circuit between the first busbar 13 and the second busbar 14 is reduced, so that the safety performance of the battery 100 is further improved.

[0168] It should be noted that the insulation arrangement between the first busbar 13 and the second busbar 14 includes but is not limited to arranging an insulating component between the first busbar 13 and the second busbar 14 .

[0169] 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 staggered with the pressure relief mechanism 112 .

[0170] Specifically, the second projection of the second busbar 14 is staggered with the pressure relief mechanism 112 , thereby reducing the obstruction of the second busbar 14 to the pressure relief mechanism 112 , so that the pressure relief mechanism 112 can be opened smoothly, further improving the safety performance of the battery assembly 10 .

[0171] At the same time, the second projection of the second busbar 14 is staggered with the pressure relief mechanism 112 so that the second busbar 14 avoids the pressure relief mechanism 112. This can reduce the short circuit between the pressure relief mechanism 112 and the second busbar 14 after it is turned on, thereby improving the safety performance of the battery assembly 10.

[0172] It should be understood that when the second projection and the pressure relief mechanism 112 are staggered, there is no overlapping area between the second projection and the pressure relief mechanism 112 .

[0173] As 2 to Figure 12 As shown, the second aspect of the present application proposes a battery 100 , and the battery 100 includes the battery assembly 10 according to the above.

[0174] Specifically, the signal sampling member 12 of the battery assembly 10 passes through the hollowed-out area 1111 on the first insulator and is connected to the battery cell 11 to achieve signal sampling of the battery cell 11. The second insulator 15 is used to block the hollowed-out area 1111 of the first insulator of the battery cell 11 through which the signal sampling member 12 does not pass, so that the battery cell 11 and the first busbar 13 are insulated from each other, thereby reducing the short-circuit problem caused by the first busbar 13 overlapping with the battery cell 11 in the hollowed-out area 1111 and improving the safety performance of the battery assembly 10.

[0175] As Figures 1 to 12 shown, in a third aspect of the present application, an electrical device includes the battery 100 as described above.

[0176] Specifically, in the battery 100, the signal sampling member 12 of the battery assembly 10 passes through the hollowed-out area 1111 on the first insulator and is connected to the battery cell 11 to achieve signal sampling of the battery cell 11. The second insulator 15 is used to block the hollowed-out area 1111 of the first insulator of the battery cell 11 through which the signal sampling member 12 does not pass, so that the battery cell 11 and the first busbar 13 are insulated from each other, thereby reducing the short-circuit problem caused by the first busbar 13 overlapping with the battery cell 11 in the hollowed-out area 1111 and improving the safety performance of the battery assembly 10.

[0177] The above description is only an overview of the technical solution of the present application. In order to be able to more clearly understand the technical means of the present application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically described below.

[0178] In the embodiments of the present application, as Figures 3 to 12 shown, the present application provides a battery assembly 10. The battery assembly 10 includes a plurality of battery cells 11, at least one signal sampling member 12, a first busbar 13 and a second insulator 15. Each battery cell 11 includes a first insulator 111. All the first insulators 111 are located on the same side of the plurality of battery cells 11. The first insulator 111 is provided on the outer surface of the battery cell 11 and has a hollowed-out area 1111. The signal sampling member 12 passes through the hollowed-out area 1111 and is connected to the battery cell 11. The first busbar 13 is arranged on the side of the plurality of battery cells 11 where the first insulator 111 is provided. The first busbar 13 is electrically connected to two different battery cells 11 respectively, and the first busbar 13 straddles M battery cells 11, where M is greater than or equal to zero. The hollowed-out area 1111 without the signal sampling member 12 is blocked by the second insulator 15, so that the first busbar 13 is insulated from the battery cell 11 at the position of the hollowed-out area 1111.

[0179] Further, the melting point of the second insulating member 15 is greater than or equal to 300 degrees Celsius. The second insulating member 15 has a projection area on the first insulating member 111, and the hollowed-out area 1111 is within the range of the projection area. Along the direction from the first insulating member 111 to the first bus bar member 13, the size of the second insulating member 15 is greater than or equal to 0.01 mm and less than or equal to 5 mm.

[0180] In some implementation processes, the second insulating member 15 includes an insulating coating, and the insulating coating is disposed on the first bus bar member 13 and / or the first insulating member 111 by spraying or electroplating. The first bus bar member 13 has a first side surface 132 facing the hollowed-out area 1111, and an insulating coating is provided on the first side surface 132. The area of the insulating coating 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. The first insulating member 111 has a second side surface facing the hollowed-out area 1111, and an insulating coating is provided on the second side surface. The area of the insulating coating 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.

[0181] Further, the insulating coating includes at least one of an organic compound and an inorganic compound, and the ceramic-like metal includes mica and / or glass fiber. The inorganic compound includes at least one of silicon dioxide, magnesium oxide, aluminum oxide, calcium oxide, and titanium dioxide. The organic compound includes at least one of polytetrafluoroethylene, polyimide, polyaniline, polyetheretherketone, and perfluorooctanesulfonic acid.

[0182] In some implementation processes, the second insulating member 15 is a plate-shaped member, and the second insulating member 15 is disposed on at least one of the first bus bar member 13 and the first insulating member 111. The second insulating member 15 is provided on the first bus bar member 13, and the connection manner between the first bus bar member 13 and the second insulating member 15 includes bonding, clamping, or connection through a connecting member. The second insulating member 15 is provided on the first insulating member 111, and the connection manner between the first insulating member 111 and the second insulating member 15 includes bonding, clamping, or connection through a connecting member. The second insulating member 15 includes a mica plate, mica paper, a ceramic sheet, or a ceramic composite tape.

[0183] Further, the first bus bar member 13 has a first side surface 132 facing the hollowed-out area 1111, and the second insulating member 15 is provided 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. The first insulating member 111 has a second side surface facing the hollowed-out area 1111, and the second insulating member 15 is provided 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.

[0184] The battery assembly 10 also includes a circuit component 16, which is electrically connected to the signal sampling component 12. The circuit component 16 includes a flexible circuit board. The battery cell 11 includes a pressure relief mechanism 112, which is arranged on the side of the battery cell 11 facing the first bus 13, and the first bus 13 has a first projection on the battery cell 11, and the first projection is staggered with the pressure relief mechanism 112. The battery assembly 10 also includes a second bus 14, the second bus 14, the second bus 14 is respectively connected to two different battery cells 11, the second bus 14 spans N battery cells 11, N is greater than or equal to zero, and M is greater than N. The second bus 14 and the first bus 13 are arranged side by side on the same side of the battery cell 11, and the second bus 14 and the first bus 13 are insulated. The second bus 14 has a second projection on the battery cell 11, and the second projection is staggered with the pressure relief mechanism 112.

[0185] In the present application, the signal sampling member 12 passes through the hollow area 1111 on the first insulation and is connected to the battery cell 11 to achieve signal sampling of the battery cell 11. The second insulation member 15 is used to shield the first insulation hollow area 1111 of the battery cell 11 where the signal sampling member 12 is not passed through, so that the battery cell 11 and the first busbar 13 are insulated, thereby reducing the short circuit problem caused by the overlap of the first busbar 13 and the battery cell 11 in the hollow area 1111, and improving the safety performance of the battery assembly 10.

[0186] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; 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 all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery assembly, characterized in that: The battery assembly comprises: A plurality of battery cells, each of the battery cells comprising a first insulating member, all of the first insulating members are located on the same side of the plurality of battery cells, and the first insulating member is disposed on an outer surface of the battery cell and has a hollow area; At least one signal sampling component, the signal sampling component passes through the hollow area and is connected to the battery cell; A first busbar, the first busbar is disposed on a side of the plurality of battery cells where the first insulating member is disposed, the first busbar is electrically connected to two different battery cells respectively, and the first busbar spans M battery cells, where M is greater than or equal to zero; The second insulating member is configured such that the hollow area where the signal sampling member is not provided is shielded by the second insulating member, so that the first current collector is insulated from the battery cell at the position of the hollow area.

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

3. The battery assembly according to claim 1, characterized in that The second insulating member has a projection area on the first insulating member, and the hollow area is within the range of the projection area.

4. The battery assembly according to claim 1, wherein: Along the direction from the first insulating member to the first bus bar, a size of the second insulating member is greater than or equal to 0.01 mm and less than or equal to 5 mm.

5. The battery assembly according to any one of claims 1 to 4, characterized in that: The second insulating member includes an insulating coating, and the insulating coating is provided on the first busbar and / or the first insulating member in a spraying or electroplating manner.

6. The battery assembly according to claim 5, characterized in that: The first current collector has a first side surface facing the hollow area, the first side surface is provided with the insulating coating, and the area of ​​the insulating coating is greater than or equal to the area of ​​the hollow area and less than or equal to the area of ​​the first side surface; And / or, the first insulating member has a second side surface facing the hollow area, the second side surface is provided with the insulating coating, and the area of ​​the insulating coating is greater than or equal to the area of ​​the hollow area and less than or equal to the area of ​​the second side surface.

7. The battery assembly according to any one of claims 1 to 4, characterized in that: The second insulating member is a plate-shaped member, and the second insulating member is disposed on at least one of the first busbar and the first insulating member.

8. The battery assembly according to claim 7, characterized in that: The first busbar is provided with the second insulating member, and the first busbar and the second insulating member are connected by bonding, clamping or connection via a connecting member; And / or, the second insulating member is provided on the first insulating member, and the first insulating member and the second insulating member are connected by bonding, clamping or connection via a connecting member.

9. The battery assembly according to claim 7, characterized in that: The second insulating member includes a mica board, mica paper, a ceramic sheet or a ceramic composite tape.

10. The battery assembly according to claim 7, characterized in that: The first current collector has a first side surface facing the hollow area, the second insulating member is disposed on the first side surface, and the area of ​​the second insulating member is greater than or equal to the area of ​​the hollow area and less than or equal to the area of ​​the first side surface; And / or, the first insulating member has a second side surface facing the hollow area, the second insulating member is provided on the second side surface, and the area of ​​the second insulating member is greater than or equal to the area of ​​the hollow area and less than or equal to the area of ​​the second side surface.

11. The battery assembly according to any one of claims 1 to 4, characterized in that: The battery assembly further includes a circuit component, and the circuit component is electrically connected to the signal sampling component.

12. The battery assembly according to claim 11, characterized in that The circuit member includes a flexible circuit board; And / or the signal sampling component includes a temperature signal sampling component.

13. The battery assembly according to any one of claims 1 to 4, characterized in that: The battery cell comprises a pressure relief mechanism, which is arranged on a side of the battery cell facing the first bus bar, and the first bus bar has a first projection on the battery cell, and the first projection is staggered with the pressure relief mechanism.

14. The battery assembly according to claim 13, wherein: The battery assembly further includes a second busbar, wherein the second busbar is respectively connected to two different battery cells, and the second busbar spans N battery cells, where N is greater than or equal to zero, and M is greater than N.

15. The battery assembly according to claim 14, characterized in that The second busbar and the first busbar are arranged side by side on the same side of the battery cell, and the second busbar is insulated from the first busbar.

16. The battery assembly according to claim 14, wherein: The second current collector has a second projection on the battery cell, and the second projection is staggered with the pressure relief mechanism.

17. A battery, characterized in that: The battery comprises the battery assembly according to any one of claims 1 to 16.

18. An electrical equipment, characterized in that: The electric device comprises the battery according to claim 17.

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