Battery and electric device comprising same

Abstract

A battery (100) and an electric device (1000) comprising same. The battery (100) comprises a battery row (1) and a reinforcing component (2), wherein the battery row (1) comprises connecting pieces (12) and a plurality of battery cells (11), a casing (111) of each battery cell (11) comprising a casing body (1112) and a casing cover (1111), and the connecting pieces (12) being arranged on the sides of the casing covers (1111) away from the casing bodies (1112) and being configured to electrically connect the plurality of battery cells (11) of the battery row (1); and the reinforcing component (2) comprises a separation part (21) and a binding part (22), the separation part (21) being arranged on the side of the battery row (1) located in a third direction and corresponding to the casing covers (1111), so as to insulate and separate the battery row (1), the binding part (22) being arranged on the separation part (21) and protruding from the separation part (21) in the third direction, the binding part (22) comprising a plurality of first pressing edges (221) arranged at intervals in a first direction, and each first pressing edge (221) extending in a second direction and abutting against one end of at least one casing body (1112) of the battery row (1) in the first direction.

Description

Battery and electrical device having the same

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202420286935.X and application date of February 6, 2024, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device having the same. Background Art

[0004] New energy vehicles have experienced rapid growth in recent years. Batteries, as the power source for electric vehicles, play an irreplaceable and important role. As core components in new energy vehicles, batteries are subject to high requirements in terms of both energy density and reliability. However, in related technologies, poor battery structural design has resulted in poor reliability. Summary of the Invention

[0005] The present application provides a battery and an electrical device having the same, wherein the restraining portion can restrain and support the connection position between the shell body and the shell cover, and can effectively improve the connection stability and reliability of the connection position between the shell body and the shell cover, thereby improving the reliability of the battery.

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising: a battery row, the battery row comprising a connecting piece and a plurality of battery cells arranged in sequence along a first direction and / or a second direction, the shell of each battery cell comprising a shell body and a shell cover, the shell body of the battery row being open on the same side in a third direction, the shell cover being connected to the open end of the shell body, the connecting piece being provided on the side of the shell cover facing away from the shell body and being used to electrically connect the plurality of battery cells of the battery row, the first direction, the second direction and the third direction intersecting in pairs; a reinforcing component, the reinforcing component comprising a partition and a binding portion, the partition being provided on a side of the battery row corresponding to the shell cover in the third direction to insulate and separate the battery row, the binding portion being provided on the partition and protruding from the partition in the third direction, the binding portion comprising a plurality of first pressing edges spaced apart along the first direction, each first pressing edge extending along the second direction and respectively stopping at one end of at least one shell body of the battery row in the first direction.

[0007] In the above technical solution, the partition is provided on the side of the battery row corresponding to the shell cover in the third direction. The partition can achieve insulation between two adjacent rows of battery rows, or between the battery row and the battery box, etc., which can reduce the probability of risks such as battery short circuit. By setting the restraining portion to include a plurality of first pressing edges arranged at intervals along the first direction, and each first pressing edge respectively stops at one end of at least one shell body of the battery row in the first direction, so that the first pressing edge can cover the connection position between the shell body and the shell cover of at least one battery cell in the battery row, and the two adjacent first pressing edges can directly or indirectly apply a force to at least the battery cell between them that expands and deforms in the first direction, so as to at least suppress the deformation of the shell bodies of all battery cells between the two adjacent first pressing edges in the first direction at the end where the shell cover is located to a certain extent, so that the first pressing edge can play a certain restraining and supporting role on the connection position between the shell body and the shell cover, so that the restraining portion can provide a certain limiting effect to improve the connection stability and reliability of the shell at the connection position between the shell body and the shell cover, and can avoid the shell from cracking or disconnecting at the connection position between the shell body and the shell cover to a certain extent in the event of thermal failure or expansion of the battery cell, thereby reducing or avoiding the occurrence of problems such as high-voltage ignition of the battery or reducing the speed of heat diffusion of the battery cell.

[0008] In some embodiments, the wall with the largest surface area in the shell body is the first wall, there are two first walls and they are spaced apart along the first direction, and each first wall is connected to the shell cover respectively.

[0009] In the above technical solution, by setting the first wall as the wall with the largest surface area in the shell body, and each first wall is connected to the shell cover respectively, the first pressing edge can stop at one side of the first wall in the first direction, that is, the first pressing edge can cover the connection position between the first wall and the shell cover, so that the binding part can limit the side with larger expansion and deformation of the battery cell (for example, in the direction of larger expansion of the battery cell), which can improve the binding and supporting effect of the binding part on the connection position between the shell body and the shell cover, and can effectively improve the stability and firmness of the connection of the shell at the connection position between the shell body and the shell cover.

[0010] In some embodiments, there are multiple rows of battery rows and they are arranged in sequence along the third direction. A reinforcing component is provided between two adjacent rows of battery rows for insulating and separating the two rows of battery rows, and the reinforcing component provided between two adjacent rows of battery rows includes two binding portions respectively provided on both sides of the partition in the third direction.

[0011] In the above technical solution, a reinforcing component is provided between two adjacent rows of battery cells, and the reinforcing component includes two binding portions respectively provided on both sides of the partition in the third direction, so that the two binding portions respectively bind the connection positions between the shell bodies and shell covers of the battery cells of the two adjacent rows of battery cells. Thus, one reinforcing component can realize the insulation spacing of the two adjacent rows of battery cells and the binding of the shell bodies of the battery cells of the two adjacent rows of battery cells, which can reduce the number of reinforcing components provided and simplify the structural settings within the battery, which is beneficial to improving the space utilization rate of the battery cells.

[0012] In some embodiments, the tie portion is integrally formed with the partition portion.

[0013] In the above technical solution, by arranging the binding part to be integrally formed with the partition, the overall structural strength of the reinforcement component can be improved, which is beneficial to improving the stability of the binding part in binding the battery row and saving the assembly process between the binding part and the partition.

[0014] In some embodiments, a liquid storage portion is formed on a side of the partition facing the battery row.

[0015] In the above technical solution, a liquid storage portion is formed on the side of the partition facing the battery pack. The liquid storage portion can store electrolyte, etc. leaked from the battery cells toward the side where the partition is located, which can improve the outflow of electrolyte leaked from the battery pack and reduce the harm, such as corrosion, of the leaked electrolyte, etc. to other components, such as other battery packs or battery boxes, thereby reducing the degree of damage to the battery caused by the leakage of electrolyte, etc.

[0016] In some embodiments, the liquid storage portion is a groove formed on the partition; or, the liquid storage portion is an adsorption member provided on the partition and capable of adsorbing electrolyte.

[0017] In the above technical solution, the liquid storage portion is provided as a groove formed on the partition so that the groove can store the electrolyte leaked from the battery cell, or the liquid storage portion is provided as an adsorption member provided on the partition and capable of adsorbing the electrolyte, so that the adsorption member can adsorb the leaked electrolyte, so as to improve the outflow of the electrolyte leaked from the battery discharge, and the structure is simple and easy to implement.

[0018] In some embodiments, a matching groove is formed on a side of the partition facing the battery row, and at least a portion of the connecting piece is accommodated in the matching groove.

[0019] In the above technical solution, by arranging that at least part of the connecting piece is accommodated in the matching groove, the matching groove can separate the corresponding connecting piece from the adjacent connecting piece, and can insulate and separate the connecting pieces to a certain extent, thereby reducing the probability of risks such as battery short circuit. At the same time, the matching groove can play a certain restraining role, so that the matching groove can restrain the connecting piece to maintain the stability of its own shape, thereby reducing the possibility of deformation of the connecting piece.

[0020] In some embodiments, a receiving groove is formed on the groove wall of the matching groove; and / or, an adsorption member capable of adsorbing electrolyte is provided on the groove wall of the matching groove.

[0021] In the above technical solution, a receiving groove is formed or an adsorption member is provided on the groove wall of the matching groove, so that the matching groove can improve the stability of the connection piece while the receiving groove or the adsorption member can accommodate leaked electrolyte, etc., so as to improve the outflow of the electrolyte leaked from the battery pack and reduce the harm of the leaked electrolyte to other components such as other battery packs or battery boxes, such as corrosion, etc., thereby reducing the degree of damage to the battery caused by the leakage of the electrolyte, etc.

[0022] In some embodiments, the reinforcement component is an insulating component; or, the reinforcement component includes a strength member and an insulating layer coated at least on a surface of the strength member corresponding to the connecting piece, the insulating layer being used for insulating and isolating the strength member and the connecting piece.

[0023] In the above technical solution, by setting the reinforcing component as an insulating component, or at least coating an insulating layer on the surface of the strength component corresponding to the connecting piece, insulation can be achieved between the reinforcing component and the connecting piece, so as to achieve insulation between the reinforcing component and the battery row, which can reduce the probability of risks such as battery short circuit.

[0024] In some embodiments, when the reinforcing component is an insulating member, the melting point of the insulating member is greater than or equal to 250° C.; and / or the resistivity of the insulating member is greater than or equal to 100 MΩ / mm.

[0025] In the above technical solution, by setting the insulating part to have a suitable melting point, the reinforcing component has better high temperature resistance, so that the reinforcing component has insulating and heat-insulating effects, which can reduce the probability of melting of the reinforcing component and thus reduce the risk of battery short circuit, etc.; by setting the insulating part to have a suitable resistivity, good insulation performance can be achieved between two adjacent rows of batteries at a higher voltage.

[0026] In some embodiments, when the reinforcing component includes a strength member and an insulating layer, the melting point of the strength member is greater than or equal to 250°C, and the insulating layer is a high-temperature resistant insulation material; and / or the resistivity of the insulating layer is greater than or equal to 100MΩ / mm.

[0027] In the above technical solution, the strength member has a suitable melting point, which allows the strength member to maintain its structural stability at higher temperatures, thereby enhancing the thermal insulation capability of the reinforcement component. The insulation layer is made of a high-temperature resistant insulation material, which further improves the thermal insulation and heat resistance of the reinforcement component. The insulation layer has a suitable resistivity, which improves the insulation effect of the reinforcement component. Of course, providing the strength member with a suitable melting point and / or providing the insulation layer with a high-temperature resistant insulation material can also improve the heat resistance of the reinforcement component, facilitate the maintenance of the structural stability of the reinforcement component at higher temperatures, and improve the situation where the reinforcement component melts at high temperatures.

[0028] In some embodiments, the reinforcing component includes at least one of a polytetrafluoroethylene member, a polyethylene member, a polystyrene member, a metal member, an alloy member, a carbon fiber member, a mica member, a ceramic member, and a silicon crystal material member.

[0029] In the above technical solution, the reinforcing component can be composed of one or more materials, so that the reinforcing component can use suitable materials to adapt to the working environment of the battery, which is beneficial to improving the performance of the reinforcing component.

[0030] In some embodiments, the insulation thickness of the reinforcement component at the connection piece position is t1, and 1 mm ≤ t1 ≤ 10 mm.

[0031] In the above technical solution, by setting the reinforcing component to have a suitable insulation thickness at the connecting piece position, the reinforcing component has sufficient insulation performance at the connecting piece position, so that the reinforcing component can insulate and separate two adjacent rows of batteries.

[0032] In some embodiments, the width of the binding portion protruding from the partition portion in the third direction is d, 5mm≤d≤20mm; and / or the thickness of the binding portion is t2, 1mm≤t2≤5mm.

[0033] In the above technical solution, the binding portion is set to have a suitable width in the third direction so that the first pressing edge of the binding portion can cover at least the connection position between the shell cover and the shell body in the third direction, so that the binding portion can effectively bind and support the connection position between the shell body and the shell cover, so as to improve the structural stability of the connection position between the shell body and the shell cover; and the binding portion is set to have a suitable thickness so that the binding portion has a suitable structural strength, so that the first pressing edge of the binding portion can stably limit the expansion and deformation of multiple battery cells of the battery row at the end where the shell cover is located, so as to suppress the cracking of the connection position between the shell body and the shell cover to a certain extent.

[0034] In some embodiments, the restraining portion further includes two second pressing edges spaced apart along the second direction, and each second pressing edge is respectively connected to the plurality of first pressing edges.

[0035] In the above technical solution, by setting a second pressing edge for connecting multiple first pressing edges, each second pressing edge can play a certain limiting role in the deformation of the first pressing edge in the first direction, which can improve the structural strength and structural stability of the binding part, and is beneficial to improving the binding effect of the first pressing edge on the shell body, so that the binding effect and support effect of the binding part on the connection position between the shell body and the shell cover can be improved, which is beneficial to further improve the connection reliability between the shell body and the shell cover.

[0036] In some embodiments, each second pressing edge is respectively abutted against one end of at least one shell body of the battery row in the second direction.

[0037] In the above technical solution, by setting a second pressing edge to stop at one end of at least one shell body of the battery row in the second direction, the second pressing edge can cover the connection position between the shell body and the shell cover of at least one battery cell in the battery row, and the two second pressing edges can directly or indirectly apply a force to at least the battery cell between them that expands and deforms in the second direction, so as to at least suppress the deformation of the shell bodies of all battery cells between the two second pressing edges in the first and second directions at the end where the shell cover is located to a certain extent, so that the second pressing edge can play a certain restraining and supporting role on the connection position between the shell body and the shell cover, so that the restraining part can provide a stronger restrictive effect to enhance the stability and firmness of the connection between the shell body and the shell cover, and can avoid the shell from cracking or disconnecting at the connection position between the shell body and the shell cover to a certain extent in the event of thermal failure or expansion of the battery cell, thereby reducing the occurrence of problems such as high-voltage ignition in the battery and reducing the speed of heat diffusion of the battery cell.

[0038] In some embodiments, the shell cover is provided with a pole, and a side wall of the shell body facing away from the shell cover is provided with a pressure relief structure. The battery also includes: a thermal management component, the thermal management component includes a heat exchange part and a discharge part, the heat exchange part is used to exchange heat with the battery exhaust, and the discharge part is used to receive emissions discharged by the battery row through the pressure relief structure, and at least a portion of the discharge part is thermally connected to the heat exchange part.

[0039] In the above technical solution, by arranging at least a portion of the discharge portion to be thermally connected to the heat exchange portion, the heat of the battery cell when thermal failure occurs can be dissipated in a timely manner. At the same time, the heat exchange portion can also cool the battery cell to reduce the probability of thermal runaway of the battery cell spreading.

[0040] In some embodiments, there are multiple battery rows and the rows are sequentially arranged along the third direction. There are multiple reinforcing components and multiple thermal management components, and the multiple reinforcing components and thermal management components are alternately arranged one by one along the third direction.

[0041] In the above technical solution, by arranging multiple reinforcement components and thermal management components alternately along the third direction, the structural design of the battery is made more compact and reasonable. Under the premise that the battery has appropriate heat dissipation performance under the action of the heat exchange part, the discharge part can discharge the high-temperature gas in the battery cell in time when thermal failure occurs, and the restraining part can restrain the shell of the battery row, thereby suppressing the continued occurrence of thermal failure and reducing the probability of thermal runaway of the battery.

[0042] In some embodiments, the battery cell also includes a pole and an electrode assembly, the pole is arranged on the shell cover, the electrode assembly includes an active material coating portion and a pole ear portion, the pole ear portion is electrically connected to the pole and the active material coating portion, respectively, the distance between the end of the restraining portion away from the partition portion and the inner wall of the shell cover is x1, and the distance between the end of the active material coating portion facing the shell cover and the inner wall of the shell cover is x2, x1≤x2; or, the active material coating portion includes an edge portion and a center portion arranged in sequence along a third direction, the thickness of the edge portion is less than the thickness of the center portion, and the distance between the end of the edge portion away from the shell cover and the inner wall of the shell cover is x3, x1≤x3.

[0043] In the above technical solution, by setting the distance between the end of the restraining part away from the partition part and the inner wall of the shell cover to be less than or equal to the distance between the end of the active material coating part facing the shell cover and the inner wall of the shell cover, or the distance between the end of the edge part away from the shell cover and the inner wall of the shell cover, the influence of the restraining part on the expansion area of ​​the battery cell can be reduced to a certain extent, which is beneficial to avoid lithium deposition in the active material coating part to a certain extent. At the same time, the restraining part can cover the shell in the third direction with an appropriate length, which is beneficial to improve the restraining effect of the restraining part on the battery row.

[0044] In a second aspect, an embodiment of the present application provides an electrical device, comprising the above-mentioned battery, which is used to provide electrical energy.

[0045] In the above technical solution, by providing a battery to provide electric energy to the electric device, the reliability of the electric device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0047] FIG1 is a schematic diagram of an electrical device provided in some embodiments of the present application;

[0048] FIG2 is an exploded schematic diagram of a battery provided in some embodiments of the present application;

[0049] FIG3 is a schematic diagram of a battery cell provided in some embodiments of the present application;

[0050] FIG4 is another schematic diagram of a battery provided in some embodiments of the present application;

[0051] FIG5 is an enlarged view of portion A shown in FIG4 ;

[0052] FIG6 is another schematic diagram of a battery provided in some embodiments of the present application;

[0053] FIG7 is a schematic diagram of a battery row and a reinforcement component provided in some embodiments of the present application;

[0054] FIG8 is an exploded schematic diagram of a battery row and a reinforcement component provided by some embodiments of the present application;

[0055] FIG9 is a cross-sectional view of a battery row and a reinforcement component provided in some embodiments of the present application;

[0056] FIG10 is a cross-sectional view of a battery pack provided in some embodiments of the present application;

[0057] FIG11 is an enlarged view of portion B shown in FIG10;

[0058] FIG12 is a partial cross-sectional view of a battery cell provided in some embodiments of the present application;

[0059] FIG13 is a schematic diagram of a reinforcement component provided in some embodiments of the present application;

[0060] FIG14 is another schematic diagram of a reinforcement component provided in some embodiments of the present application;

[0061] FIG15 is a schematic structural diagram of a reinforcement component provided in some embodiments of the present application;

[0062] FIG16 is another schematic structural diagram of a battery cell provided in some embodiments of the present application.

[0063] Figure markings: electrical device 1000, controller 200, motor 300, battery 100, battery case 101, first case 101a, second case 101b, battery row 1, battery cell 11, shell 111, open end 111a, shell cover 1111, shell body 1112, first wall 1112a, pole 112, electrode assembly 113, active material coating portion 1131, edge portion 1131a, center portion 1131b, pole ear portion 1132, pressure relief structure 114, connecting piece 12, reinforcement component 2, partition portion 21, liquid storage portion 21a, mating groove 21b, restraining portion 22, first pressing edge 221, second pressing edge 222, thermal management component 3, heat exchange portion 31, discharge portion 32. DETAILED DESCRIPTION

[0064] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0065] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application 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 specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0066] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0067] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0068] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of the present application shown in the drawings are for illustrative purposes only and should not constitute any limitation on the present application.

[0069] The term "plurality" used in this application refers to two or more (including two).

[0070] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0071] The battery referred to in the embodiments of this application refers to a single physical module that includes multiple battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may be a battery module or battery pack. A battery module generally includes multiple battery cells. A battery generally includes a battery case for enclosing multiple battery cells or multiple battery rows. The battery case prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells. Of course, the battery may also not include a battery case.

[0072] For example, a battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and electrolyte, and is provided with at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive and negative electrode sheets and separators.

[0073] The positive electrode sheet generally includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is directly or indirectly coated on the positive electrode current collector (i.e., the positive electrode active material coating portion). The positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer. The positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab. Multiple positive electrode tabs stacked together can form a positive electrode tab portion and form an electrical connection with the positive electrode post. For example, the stacked multiple positive electrode tabs can be directly welded to the positive electrode post to form an electrical connection. Alternatively, the electrode assembly can further include a positive electrode adapter. The stacked multiple positive electrode tabs are welded to one end of the positive electrode adapter, and the other end of the positive electrode adapter is welded to the positive electrode post to form an electrical connection between the positive electrode tab and the positive electrode post.

[0074] The negative electrode sheet can generally include a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is directly or indirectly coated on the negative electrode current collector (i.e., the negative electrode active material coating portion). The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. Multiple negative electrode tabs stacked together can form a negative electrode tab portion and form an electrical connection with the negative electrode column. For example, the multiple negative electrode tabs stacked together can be directly welded to the negative electrode column to form an electrical connection; alternatively, the electrode assembly can further include a negative electrode adapter sheet. The multiple negative electrode tabs stacked together are welded to one end of the negative electrode adapter sheet, and the other end of the negative electrode adapter sheet is welded to the negative electrode column to form an electrical connection between the negative electrode tab sheet and the negative electrode column. The material of the separator is not limited, and can be, for example, polypropylene or polyethylene.

[0075] The pressure relief structure on the battery cell mentioned in this application is used to release gas from the battery cell when the internal pressure of the battery cell is too high (for example, due to overcharging), thereby reducing the internal pressure of the battery cell and preventing the battery cell from exploding due to excessive internal pressure. For example, the pressure relief structure can be an explosion-proof valve, explosion-proof disk, etc.

[0076] In recent years, new energy vehicles have experienced rapid development. In the electric vehicle sector, batteries, as the power source of electric vehicles, play an irreplaceable and important role. As core components of new energy vehicles, batteries have high requirements in terms of both energy density and reliability.

[0077] In the related art, when the charged ends of battery cells are arranged relative to each other, insulating components are usually arranged between the above-mentioned battery cells to insulate and isolate the relative battery cells; however, when the battery cells experience thermal runaway, the battery cells may cause the welds on the shell to crack and fail due to gas pressure expansion, etc., and flames may burst out and easily burn through the above-mentioned insulating components, thereby causing insulation failure between the relatively arranged battery cells and easily causing high-voltage ignition problems, and the reliability of the entire battery is poor.

[0078] Based on the above considerations, in order to improve the reliability of the battery, a battery is proposed, which includes a battery row and a reinforcement component, the battery row includes a connecting piece and a plurality of battery cells arranged in sequence along the first direction and / or the second direction, the shell of each battery cell includes a shell body and a shell cover, the shell body of the battery row is open on the same side in the third direction, the shell cover is connected to the open end of the shell body, the connecting piece is provided on the side of the shell cover away from the shell body and is used to electrically connect the plurality of battery cells in the battery row, and the first direction, the second direction and the third direction intersect with each other; the reinforcement component includes a partition and a binding portion, the partition is provided on the side of the battery row corresponding to the shell cover in the third direction to insulate and separate the battery rows, the binding portion is provided on the partition and protrudes from the partition in the third direction, the binding portion includes a plurality of first pressing edges spaced apart along the first direction, each first pressing edge extends along the second direction and respectively stops at one end of at least one shell body of the battery row in the first direction.

[0079] In the above technical solution, the partition is provided on the side of the battery row corresponding to the shell cover in the third direction. The partition can achieve insulation between two adjacent rows of battery rows, or between the battery row and the battery box, etc., which can reduce the probability of risks such as battery short circuit. By setting the restraining portion to include a plurality of first pressing edges arranged at intervals along the first direction, and each first pressing edge respectively stops at one end of at least one shell body of the battery row in the first direction, so that the first pressing edge can cover the connection position between the shell body and the shell cover of at least one battery cell in the battery row, the two adjacent first pressing edges can directly or indirectly apply a force to at least the battery cell between them that expands and deforms in the first direction, so as to at least suppress the deformation of the shell bodies of all battery cells between the two adjacent first pressing edges in the first direction at the end where the shell cover is located to a certain extent, so that the first pressing edge can play a certain restraining and supporting role on the connection position between the shell body and the shell cover, so that the restraining portion can provide a certain limiting effect to improve the connection stability and reliability of the shell at the connection position between the shell body and the shell cover, and can avoid the shell from cracking or disconnecting at the connection position between the shell body and the shell cover to a certain extent in the event of thermal failure or expansion of the battery cell, thereby reducing or avoiding the occurrence of problems such as high-voltage ignition in the battery or reducing the speed of heat diffusion of the battery cell.

[0080] The present application provides an electrical device using the battery disclosed herein as a power source. The electrical device may be, but is not limited to, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric tool may include a metal cutting power tool, a grinding power tool, an assembly power tool, and a railway power tool, etc.

[0081] For the convenience of explanation, the following embodiments take the electric device as a vehicle as an example to introduce the structure of the electric device and the battery of the present application in detail.

[0082] Please refer to Figure 1, which is a schematic structural diagram of a vehicle in which the power-consuming device 1000 provided in some embodiments of the present application is a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery 100, and the battery 100 can be arranged at the bottom, head or tail of the vehicle. The battery 100 can be used to power the vehicle, for example, the battery 100 can be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery 100 can not only serve as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0083] Please refer to Figure 2, which is an exploded view of the structure of the battery cell 11 used in the battery 100 provided in some embodiments of the present application. The battery 100 includes a battery case 101 and a plurality of battery cells 11, and the battery cells 11 are accommodated in the battery case 101. Among them, the battery case 101 is used to provide an assembly space for the battery cells 11, and the battery case 101 can adopt a variety of structures. Please refer to Figure 2, in an embodiment of the present application, the battery case 101 may include a first case 101a and a second case 101b, the first case 101a and the second case 101b cover each other, and the first case 101a and the second case 101b jointly define a accommodating cavity for accommodating the battery cells 11. The second housing 101b can be a hollow structure with one end open, and the first housing 101a can be a plate-like structure. The first housing 101a covers the open side of the second housing 101b, so that the first housing 101a and the second housing 101b together define a storage cavity. Alternatively, the first housing 101a and the second housing 101b can both be hollow structures with one end open (for example, as shown in FIG. 2 ), with the open side of the first housing 101a covering the open side of the second housing 101b. Of course, the battery housing 101 formed by the first housing 101a and the second housing 101b can be of various shapes, such as a cylinder or a rectangular parallelepiped.

[0084] In the battery 100, multiple battery cells 11 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 11. Multiple battery cells 11 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 11 can be housed within the battery case 101. Alternatively, the battery 100 can be formed by first connecting multiple battery cells 11 in series, in parallel, or in a hybrid connection to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid connection to form an entire battery module, which is then housed within the battery case 101. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar for electrically connecting the multiple battery cells 11.

[0085] Please refer to Figures 3 and 4. Figure 3 is a schematic structural diagram of a battery cell 11 provided in some embodiments of the present application. For example, the battery cell 11 is a rectangular parallelepiped, and the height direction of the battery cell 11 (e.g., the Z direction in Figure 3) is the third direction, the length direction of the battery cell 11 (e.g., the Y direction in Figure 3) is the second direction, and the thickness direction of the battery cell 11 (e.g., the X direction in Figure 3) is the first direction. The first direction, the second direction, and the third direction are mutually perpendicular. Of course, the correspondence between the first direction, the second direction, and the third direction and the height direction, length direction, and thickness direction of the battery cell 11 is not limited to this. In addition, the shape of the battery cell 11 is not limited to this. In other embodiments of the present application, the battery cell 11 can also be a polygonal prism, a flat body, or other shapes.

[0086] Please refer to Figures 4 and 7-8. In an embodiment of the present application, a battery 100 includes a battery row 1, which includes a connecting piece 12 and a plurality of battery cells 11 arranged sequentially along a first direction and / or a second direction. The shell 111 of each battery cell 11 includes a shell body 1112 and a shell cover 1111. The shell body 1112 of the battery row 1 is open on the same side in the third direction, and the shell cover 1111 is connected to the open end 111a of the shell body 1112. The connecting piece 12 is provided on a side of the shell cover 1111 away from the shell body 1112 and is used to electrically connect the plurality of battery cells 11 of the battery row 1 to achieve series connection, parallel connection, or mixed connection of the plurality of battery cells 11. The first direction, the second direction, and the third direction intersect with each other.

[0087] For example, with reference to FIG4 , the first, second, and third directions are perpendicular to each other, the first direction being the vertical direction, the second direction being the horizontal direction, and the third direction being the front-to-back direction. A plurality of battery cells 11 arranged sequentially along the left-to-right direction constitute a battery unit. A battery row 1 includes a plurality of battery cells arranged sequentially along the vertical direction. For a single battery row 1, the front end of the shell 1112 of each battery cell 11 in the battery row 1 is open, or the rear end of the shell 1112 of each battery cell 11 in the battery row 1 is open, and the shell cover 1111 is connected to the open end 111a of the shell 1112. For example, the shell cover 1111 is welded to the open end 111a of the shell 1112 to form a weld where the shell cover 1111 and the shell 1112 are connected. It is understood that when the front end of the shell 1112 is open, the connecting piece 12 is disposed on the front side of the shell cover 1111; when the rear end of the shell 1112 is open, the connecting piece 12 is disposed on the rear side of the shell cover 1111. Of course, in other examples, two of the first direction, the second direction, and the third direction may intersect at a non-right angle.

[0088] The battery 100 also includes a reinforcing component 2, which includes a partition 21 and a restraining portion 22. The partition 21 is provided on the side of the battery row 1 corresponding to the shell cover 1111 in the third direction to insulate and separate the battery rows 1. This can achieve insulation between two adjacent rows of battery rows 1, or insulation between the battery row 1 and the battery case 101, etc., thereby reducing the probability of risks such as short circuits in the battery 100. The restraining portion 22 is provided on the partition 21, and the restraining portion 22 protrudes from the partition 21 in the third direction; the restraining portion 22 includes a plurality of first pressing edges 221 spaced apart along the first direction, each first pressing edge 221 extending along the second direction, and each first pressing edge 221 respectively stops at one end of at least one shell body 1112 of the battery row 1 in the first direction.

[0089] For example, a plurality of battery rows 1 are arranged in sequence along a third direction. For example, if one of the two ends of a battery cell 11 in the third direction is charged, the end of the battery cell 11 corresponding to the housing cover 1111 is charged (for example, the housing cover 1111 is provided with a positive electrode post and a negative electrode post, and the positive electrode post and the negative electrode post are insulated from the housing cover 1111). For two adjacent rows of battery cells 1 with charged ends facing each other, a reinforcing component 2 is provided between the two rows. Alternatively, if both ends of the battery cell 11 in the third direction are charged (for example, the positive electrode post is provided at the end of the housing 1112 facing away from the housing cover 1111, and the housing cover 1111 serves as the negative electrode), a reinforcing component 2 may be provided between any two adjacent rows of battery cells 1. Alternatively, the battery cell 1 may be arranged in a single row, with the reinforcing component 2 provided on the side of the battery cell 1 in the third direction opposite the housing cover 1111.

[0090] It can be seen that since the partition 2 is provided on the side of the battery row 1 corresponding to the shell cover 1111 in the third direction, the partition 2 and the shell cover 1111 can be arranged relative to each other, so that each first pressing edge 221 can stop at one end of the shell body 1112 of at least one battery cell 11 provided with the shell cover 1111, so that the first pressing edge 221 can cover the connection position between the shell body 1112 and the shell cover 1111 of at least one battery cell 11 of the battery row 1 (for example, the shell body 1112 and the shell cover 1111 are welded together, and the first pressing edge 221 can cover the weld between the shell body 1112 and the shell cover 1111 of at least one battery cell 11); and since the first pressing edge 221 stops at one end of the shell body 1112 in the first direction, when the shell body 1112 expands and deforms in the first direction, the two adjacent first pressing edges 221 can directly or indirectly exert an action on at least the battery cell 11 between them that expands and deforms in the first direction. Apply force to at least suppress, to a certain extent, the deformation of the shell body 1112 of all battery cells 11 between two adjacent first pressing edges 221 in the first direction at the end where the shell cover 1111 is located, so that the first pressing edge 221 can play a certain restraining and supporting role on the connection position of the shell body 1112 and the shell cover 1111, so that the restraining portion 22 can provide a certain limiting effect, which is beneficial to improving the connection stability and reliability of the shell 111 at the connection position between the shell body 1112 and the shell cover 1111, and can, to a certain extent, avoid the shell 111 at the connection position between the shell body 1112 and the shell cover 1111 in the event of thermal failure or expansion of the battery cell 11 (for example, the air pressure in the battery 100 is too high and the shell 111 expands, and the shell cover 1111 and the shell body 1112 crack), thereby effectively reducing the occurrence of problems such as high-voltage ignition in the battery 100 and reducing the speed of heat diffusion of the battery cell 11.

[0091] Among them, the partition 21 is arranged on the side of the battery row 1 corresponding to the shell cover 1111 in the third direction, and the connecting piece 12 is arranged on the side of the shell cover 1111 away from the shell body 1112 and is used to electrically connect the multiple battery cells 11 of the battery row 1. The restraining portion 22 can not only limit the expansion and deformation of the battery cell 11, but also improve the fatigue deformation failure of the connecting piece 12 caused by the expansion and deformation of the battery cell 11 pulling the connecting piece 12 during the entire life cycle of the battery 100, which is beneficial to reduce the failure risk of the connecting piece 12 and improve the working reliability and structural stability of the connecting piece 12.

[0092] The following description is made by taking the example that the restraining portion 22 includes two first pressing edges 221 spaced apart along the first direction:

[0093] For example, the battery row 1 includes a plurality of battery cells 11 arranged in sequence along a first direction, and the two outermost battery cells 11 of the battery row 1 in the first direction are respectively the first battery cell and the second battery cell, and the restraining portion 22 includes two first pressing edges 221 spaced apart along the first direction, one of the two first pressing edges 221 abuts against a side of the shell body 1112 of the first battery cell away from the second battery cell, and the other abuts against a side of the shell body 1112 of the second battery cell away from the first battery cell 11; thus, when any one or more battery cells 11 expand and deform in the first direction, the two first pressing edges 221 at least exert an extrusion force in the first direction on the expanded battery cell 11, so as to at least suppress deformation of the shell body 1112 of the battery cell 11 in the first direction at the end where the shell cover 1111 is located. It can be seen that one of the two first pressing edges 221 presses and covers the side of the shell body 1112 of the first battery cell away from the second battery cell, and one of the above-mentioned first pressing edges 221 covers the shell body 1112 of the first battery cell. The connection position between the shell body 1112 of the second battery cell and the shell cover 1111 (for example, the end where the shell cover 1111 of the first battery cell is located) is covered by another first pressing edge 221, which covers the side of the shell body 1112 of the second battery cell away from the first battery cell. The other first pressing edge 221 covers the connection position between the shell body 1112 of the second battery cell and the shell cover 1111 (for example, the end where the shell cover 1111 of the second battery cell is located). At the same time, the connection position between the shell body 1112 and the shell cover 1111 of each battery cell 11 is restricted in the first direction. The restraining portion 22 can clamp the end of the battery cell 11 with the shell cover 1111 in the first direction, so as to reduce the probability of cracks or breakage at the connection position between the shell body 1112 and the shell cover 1111 due to thermal failure or expansion of the battery cell 11 to a certain extent, and can reduce the probability of thermal runaway of the battery 100. For example, the restraining portion 22 can inhibit cracking at the connection position between the shell cover 1111 and the shell body 1112, so as to reduce the heat diffusion rate when the battery 100 fails thermally, and to a certain extent eliminate high-voltage hazards.

[0094] For example, the battery row 1 includes a plurality of battery cells 11 arranged in sequence along the second direction (e.g., the left-right direction), and the restraining portion 22 includes two first pressing edges 221 spaced apart along the first direction, and the two first pressing edges 221 respectively stop at both sides of the shell body 1112 of all the battery cells 11 in the battery row 1 in the first direction; thus, when any one or more battery cells 11 expand and deform in the first direction, the two first pressing edges 221 at least exert an extrusion force in the first direction on the expanded battery cell 11, so as to at least suppress, to a certain extent, the shell body 1112 of the battery cell 11 on the side where the shell cover 1111 is located. From the deformation of the end in the first direction, it can be seen that the two first pressing edges 221 respectively cover the connection positions of the shell body 1112 and the shell cover 1111 of multiple battery cells 11 on both sides of the first direction, so that the connection position of the shell body 1112 and the shell cover 1111 of each battery cell 11 is restricted in the first direction, so that the restraining portion 22 can clamp the end of the battery cell 11 with the shell cover 1111 in the first direction, so as to reduce the probability of cracks or breakage at the connection position of the shell body 1112 and the shell 111 due to thermal failure of the battery cell 11 or expansion of the battery 100 to a certain extent.

[0095] For example, in conjunction with Figures 4 and 7-8, the battery row 1 includes a plurality of battery cells 11 arranged in sequence along the first direction and the second direction, wherein the plurality of battery cells 11 arranged in sequence along the second direction constitute a battery unit, and the plurality of battery units are arranged in sequence along the first direction. The two outermost battery cells of the battery row 1 in the first direction are respectively the first battery unit and the second battery unit, and the restraining portion 22 includes two first pressing edges 221 spaced apart along the first direction, wherein one of the first pressing edges 221 abuts against the first battery unit; thus, when any one or more battery cells 11 expand and deform in the first direction, the two first pressing edges 221 at least apply an extrusion force in the first direction to the expanded battery cell 11, so as to at least suppress the shell 11 of the battery cell 11. 112 is deformed in the first direction at the end where the shell cover 1111 is located. It can be seen that the two first pressing edges 221 are pressed on the two ends of the battery row 1 in the first direction, and each first pressing edge 221 presses the connection positions between the shell body 1112 and the shell cover 1111 of the corresponding multiple battery cells 11. At the same time, the connection position between the shell body 1112 and the shell cover 1111 of each battery cell 11 is restricted in the first direction, so that the restraining portion 22 can clamp the end of the battery cell 11 with the shell cover 1111 in the first direction, so as to reduce to a certain extent the probability of cracks or breakage at the connection position between the shell body 1112 and the shell cover 1111 of the battery cell 11 due to thermal failure or expansion of the battery 100.

[0096] Of course, in other examples, the restraining portion 22 includes three or more first pressing edges 221 spaced apart along the first direction: 1. The battery row 1 includes a plurality of battery cells 11 arranged in sequence along the first direction, and two of the plurality of first pressing edges 221 are respectively stopped at the two ends of the battery row 1 in the first direction, and the remaining first pressing edges 221 can be respectively stopped between two adjacent battery cells 11; 2. The battery row 2 includes a plurality of battery cells arranged in sequence along the first direction and the second direction, and a plurality of battery cells 11 arranged in sequence along the second direction constitute a battery unit, and the battery row 1 includes a plurality of battery units arranged in sequence along the first direction, and two of the plurality of first pressing edges 221 are respectively stopped at the two ends of the battery row 1 in the first direction, and the remaining first pressing edges 221 can be respectively stopped between two adjacent battery units.

[0097] It is understandable that in the embodiments of the present application, when any battery cell 1 of the battery row 1 does not expand or deform, an extrusion force may be generated between the first pressing edge 221 and the corresponding battery cell 11, or the first pressing edge 221 and the corresponding battery cell 11 are just in contact without generating an extrusion force.

[0098] Exemplarily, the partition 21 has a restraining portion 22 on one of its two sides in the third direction, or the partition 21 has a restraining portion 22 on both sides in the third direction. For example, taking multiple rows of battery rows 1 arranged sequentially along the third direction, the shell covers 1111 of two adjacent rows of battery rows 1 are arranged back to back, the partition 21 is located between the shell cover 1111 of one row of battery rows 1 and the shell body 1112 of the other row of battery rows 1, and the partition 21 has a restraining portion 22 on one side in the third direction, and the restraining portion 22 protrudes toward the side where the shell cover 1111 of one row of battery rows 1 is located; alternatively, the shell cover 1111 of one row of battery rows 1 faces the shell cover 1111 of the other row of battery rows 1, the partition 21 is located between the shell covers 1111 of the battery cells 11 of the two adjacent rows of battery rows 1, and the restraining portion 22 is provided on both sides of the partition 21 in the third direction. In other examples, the battery rows 1 are arranged in one row, and the partition 21 is provided with a binding portion 22 on one side thereof facing the battery row 1 in the third direction.

[0099] In the above technical solution, by providing the partition 21 on the side of the battery row 1 corresponding to the shell cover 1111 in the third direction, the partition 21 can achieve insulation between two adjacent rows of battery rows 1, or achieve insulation between the battery row 1 and the battery case 101, etc., which can reduce the probability of risks such as short circuits in the battery 100. By providing the restraining portion 22 including a plurality of first pressing edges 221 spaced apart along the first direction, and each first pressing edge 221 respectively abutting against one end of at least one shell body 1112 of the battery row 1 in the first direction, the first pressing edge 221 can cover the connection position between the shell body 1112 and the shell cover 1111 of at least one battery cell 11 of the battery row 1, and the two adjacent first pressing edges 221 can directly or indirectly apply a force to at least the battery cell 11 between them that expands and deforms in the first direction, so as to at least suppress, to a certain extent, the shell bodies 1112 of all battery cells 11 between the two adjacent first pressing edges 221 at the location of the shell cover 1111. The deformation of one end in the first direction allows the first pressing edge 221 to play a certain restraining and supporting role on the connection position between the shell body 1112 and the shell cover 1111, so that the restraining portion 22 can provide a certain limiting effect to improve the connection stability and reliability of the shell 111 at the connection position between the shell body 1112 and the shell cover 1111, and can to a certain extent prevent the shell 111 from cracking or disconnecting at the connection position between the shell body 1112 and the shell cover 1111 in the event of thermal failure or expansion of the battery cell 11, thereby reducing or avoiding the occurrence of problems such as high-voltage ignition in the battery 100 or reducing the speed of heat diffusion of the battery cell 11.

[0100] 3-4 , in some embodiments, the wall with the largest surface area in the shell body 1112 is the first wall 1112 a . There are two first walls 1112 a spaced apart along the first direction, and each first wall 1112 a is connected to the shell cover 1111 .

[0101] It is understood that the first wall 1112a is the wall with the largest surface area within the shell 1112 of the battery cell 11, that is, the first wall 1112a is the "large surface" of the battery cell 11. Therefore, when the battery cell 11 expands and deforms, the amount of expansion of the battery cell 11 in the first direction is generally greater than the amount of expansion of the battery cell 11 in the second and third directions. For example, with reference to FIG3 , the multiple battery cells 11 of the battery row 1 are arranged horizontally, with two first walls 1112a spaced apart in the vertical direction.

[0102] For example, in conjunction with Figure 3, the two side walls of the shell body 1112 of the battery cell 11 in the first direction are first walls 1112a, the shell cover 1111 is respectively connected to the two first walls 1112a, the partition 21 is located on the side of the shell cover 1111 away from the shell body 1112, and the partition 21 is provided with a first pressing edge 221 protruding toward the shell cover 1111, the first pressing edge 221 stops at one end of the shell body 1112 in the first direction, and the first pressing edge 221 covers the connection position between the shell body 1112 and the shell cover 1111.

[0103] In the above technical solution, by setting the first wall 1112a as the wall with the largest surface area in the shell body 1112, and each first wall 1112a is respectively connected to the shell cover 1111, the first pressing edge 221 can stop at one side of the first wall 1112a in the first direction, that is, the first pressing edge 221 can cover the connection position between the first wall 1112a and the shell cover 1111, so that the restraining portion 22 can restrain the battery cell 11 in the direction of greater expansion and deformation of the battery cell 11, which is conducive to further improving the restraining and supporting effect of the restraining portion 22 on the connection position between the shell body 1112 and the shell cover 1111, and can effectively improve the stability and reliability of the connection of the shell 111 at the connection position between the shell body 1112 and the shell cover 1111.

[0104] Referring to Figure 4, in some embodiments, there are multiple rows of battery rows 1 and the multiple rows of battery rows 1 are arranged in sequence along the third direction. A reinforcement component 2 is provided between two adjacent rows of battery rows 1 for insulating the two rows of battery rows 1, and the reinforcement component 2 provided between the two adjacent rows of battery rows 1 includes two binding portions 22 respectively provided on both sides of the partition 21 in the third direction.

[0105] For example, in combination with Figures 4 and 7-8, multiple rows of battery rows 1 are arranged in sequence along the third direction, and a reinforcement component 2 is provided between two adjacent rows of battery rows 1. The partition 21 is used to insulate and separate the two adjacent rows of battery rows 1. The two binding portions 22 are respectively provided on both sides of the partition 21 in the third direction. Each binding portion 22 includes two first pressing edges 221 spaced apart along the first direction. The two first pressing edges 221 extend to both sides of the battery row 1 along the second direction, and each first pressing edge 221 stops at the multiple shell bodies 1112 on one side of the battery row 1 in the first direction, and each first pressing edge 221 stops at the connection position between the shell bodies 1112 and the shell covers 1111 of the multiple battery cells 11 on one side of the battery row 1 in the first direction.

[0106] In the above technical solution, a reinforcing component 2 is provided between two adjacent rows of battery rows 1, and the reinforcing component 2 includes two binding portions 22 respectively provided on both sides of the partition portion 21 in the third direction, so that the two binding portions 22 respectively bind the connection positions of the shell body 1112 and the shell cover 1111 of the battery cells 11 of the two adjacent rows of battery rows 1. Thus, one reinforcing component 2 can realize the insulation spacing of the two adjacent rows of battery rows 1, as well as the binding of the shell body 1112 of the battery cells 11 of the two adjacent rows of battery rows 1. The number of reinforcing components 2 provided can be reduced, and the structural setting inside the battery 100 can be simplified, which is conducive to improving the space utilization rate of the battery cells 11.

[0107] 7 and 8 , in some embodiments, the binding portion 22 is integrally formed with the partition portion 21 .

[0108] In the above technical solution, by providing the binding portion 22 integrally formed with the partition 21, the overall structural strength of the reinforcing component 2 can be improved, which is beneficial to improving the stability of the binding portion 22 in binding the battery row 1 and saving the assembly process between the binding portion 22 and the partition 21.

[0109] Exemplarily, the reinforcement component 2 is an integrally formed part.

[0110] Exemplarily, the tie portion 22 and the partition portion 21 are separate parts. For example, the tie portion 22 is detachably provided on the partition portion 21 .

[0111] In some embodiments, a liquid storage portion 21 a is formed on a side of the partition 21 facing the battery row 1 .

[0112] In the above technical solution, a liquid storage portion 21a is formed on the side of the partition 21 facing the battery pack 1. The liquid storage portion 21a can store the electrolyte and the like leaked from the battery cell 11 toward the side where the partition 21 is located, thereby improving the outflow of the electrolyte leaked from the battery pack 1 and reducing the harm, such as corrosion, caused by the leaked electrolyte and the like to other components, such as other battery packs 1 or the battery case 101, thereby reducing the degree of damage to the battery 100 caused by the leakage of the electrolyte and the like.

[0113] In some embodiments, the liquid storage portion 21a is a groove formed on the partition 21; or, the liquid storage portion 21a is an adsorbent (such as a porous adsorbent) provided on the partition 21 and capable of adsorbing electrolyte.

[0114] For example, in conjunction with Figure 13, the partition 21 is formed with multiple liquid storage parts 21a on the side facing the battery row 1. The liquid storage parts 21a are grooves, and the multiple grooves are arranged in sequence along the first direction and the second direction, so that the grooves can store electrolyte leaked from some battery cells 11.

[0115] In the above technical solution, the liquid storage portion 21a is provided as a groove formed on the partition 21, so that the groove can store the electrolyte leaked from the battery cell 11, or the liquid storage portion 21a is provided as an adsorption member provided on the partition 21 and capable of adsorbing the electrolyte, so that the adsorption member can adsorb the leaked electrolyte, so as to improve the outflow of the electrolyte leaked from the battery row 1. The structure is simple and easy to implement.

[0116] 12-13 , in some embodiments, a mating groove 21 b is formed on one side of the partition 21 facing the battery row 1 , and at least a portion of the connecting piece 12 is accommodated in the mating groove 21 b .

[0117] For example, referring to Figures 12 and 13 , a separator 21 is provided between two adjacent rows of battery cells 1. The housing covers 1111 of the battery cells 11 of the two rows of battery cells 1 face the separator 21. Connecting tabs 12 are provided on the side of the housing covers 1111 facing away from the housing body 1112. Multiple connecting tabs 12 electrically connect multiple battery cells 11 of the battery row 1. Multiple mating grooves 21b are formed on the side of the separator 21 facing the two adjacent rows of battery cells 1. The connecting tabs 12 can be received in corresponding mating grooves 21b, thereby isolating and separating the multiple connecting tabs 12 through the separator 21. Thus, the mating grooves 21b can improve the insulation between the multiple connecting tabs 12, to a certain extent resolving the problem of incomplete insulation between the connecting tabs 12, and reducing the probability of short circuits and other risks in the battery 100. Furthermore, the mating grooves 21b are used to accommodate the connecting tabs 12, which helps to improve the compactness of the component arrangement within the battery 100. The mating grooves 21b also serve to constrain the connecting tabs 12, thereby improving the electrical connection stability of the multiple battery cells 11 of the battery row 1. In addition, the shape of the mating groove 21b can be adapted to the shape of the connecting piece 12, so that the mating groove 21b can play a certain restraining role, so that the mating groove 21b can restrain the connecting piece 12 to maintain the stability of its own shape, and reduce the possibility of deformation of the connecting piece 12; it can be seen that during the life cycle of the battery 100, the mating groove 21b can suppress the connecting piece 12 from fatigue deformation and failure during the operation of the battery cell 11, and can improve the structural stability of the connecting piece 12.

[0118] In the above technical solution, by arranging at least a portion of the connecting piece 12 to be accommodated in the matching groove 21b, the matching groove 21b can separate the corresponding connecting piece 12 from the adjacent connecting piece 12, and can insulate and separate the adjacent connecting pieces 12 to a certain extent, thereby reducing the probability of risks such as short circuit in the battery 100. At the same time, the matching groove 21b can play a certain restraining role, so that the matching groove 21b can restrain the connecting piece 12 to maintain the stability of its own shape, thereby reducing the possibility of deformation of the connecting piece 12.

[0119] Exemplarily, the shape of the fitting groove 21b is not limited. For example, the fitting groove 21b may be circular, oval, elliptical, polygonal, or a combination of a part of a polygon and a part of a circle.

[0120] Exemplarily, the connecting piece 12 can be accommodated in the matching groove 21 b, and the connecting piece 12 is integrally formed with the partition 21 , so that the connecting piece 12 can be integrated into the partition 21 , which is beneficial to simplifying the assembly efficiency of the battery 100 .

[0121] In some embodiments, a receiving groove is formed on the groove wall of the matching groove 21b; and / or, an adsorption member capable of adsorbing electrolyte is provided on the groove wall of the matching groove 21b.

[0122] In the above technical solution, a receiving groove is formed or an adsorption member is provided on the groove wall of the matching groove 21b, so that the matching groove 21b can improve the stability of the connection piece 12 while the receiving groove or adsorption member can accommodate the leaked electrolyte, etc., so as to improve the outflow of the electrolyte leaked from the battery row 1, and reduce the harm of the leaked electrolyte to other components such as other battery rows 1 or the battery box 101, such as corrosion, etc., thereby reducing the degree of damage to the battery 100 caused by the leakage of the electrolyte, etc.

[0123] Exemplarily, when the partition 21 is formed with a matching groove 21 b and a liquid storage portion 21 a on one side facing the battery row 1 , the matching groove 21 b and the liquid storage portion 21 a are spaced apart, or the matching groove 21 b is configured as the liquid storage portion 21 a .

[0124] In some embodiments, the reinforcing component 2 is an insulating component; or, the reinforcing component 2 includes a strength component and an insulating layer coated on at least the surface of the strength component corresponding to the connecting piece 12, and the insulating layer is used to insulate and isolate the strength component and the connecting piece 12 to achieve insulation between the reinforcing component 2 and the connecting piece 12, and to achieve insulation between the multiple battery cells 11 of the battery row 1.

[0125] In the above technical solution, by setting the reinforcing component 2 as an insulating component, or by at least coating an insulating layer on the surface of the strength component corresponding to the connecting piece 12, insulation between the reinforcing component 2 and the connecting piece 12 can be achieved, so as to achieve insulation between the reinforcing component 2 and the battery row 1, which can reduce the probability of risks such as short circuits in the battery 100.

[0126] Illustratively, when the reinforcing component 2 includes a strength member and an insulating layer, the insulating layer may wrap the entire strength member.

[0127] In some embodiments, when the reinforcing member 2 is an insulating member, the melting point of the insulating member is greater than or equal to 250°C; and / or the resistivity of the insulating member is greater than or equal to 100 MΩ / mm. For example, the melting point of the insulating member may be 250°C, 270°C, 300°C, 350°C, or 400°C; and the resistivity of the insulating member may be 100 MΩ / mm, 150 MΩ / mm, 200 MΩ / mm, 250 MΩ / mm, or 300 MΩ / mm.

[0128] In the above technical solution, by setting the insulating part to have a suitable melting point, the reinforcing component 2 has better high temperature resistance, so that the reinforcing component 2 has certain insulation and heat insulation capabilities, which can reduce the probability of melting of the reinforcing component 2, thereby reducing the risk of short circuit of the battery 100; by setting the insulating part to have a suitable resistivity, the insulation performance between two adjacent rows of battery rows 1 can still be good at a higher voltage, thereby improving the applicability of the reinforcing component 2.

[0129] In some embodiments, when the reinforcing member 2 includes a strength member and an insulating layer, the melting point of the strength member is greater than or equal to 250° C. The insulating layer is made of a high-temperature resistant heat-insulating material; and / or the resistivity of the insulating layer is greater than or equal to 100 MΩ / mm.

[0130] For example, high temperature resistant heat insulating material can be provided on the surface of the strength member by compounding or spraying to form an insulating layer.

[0131] In the above technical solution, the strength member has a suitable melting point, which can enable the strength member to maintain the stability of its own structure at a higher temperature, which is beneficial to enhancing the heat resistance of the reinforcing component 2. The insulating layer is a high-temperature resistant heat-insulating material, which can further improve the heat resistance and heat insulation of the reinforcing component 2; the insulating layer has a suitable resistivity, which can improve the insulation effect of the reinforcing component 2. Of course, setting the strength member to have a suitable melting point and / or setting the insulating layer to be a high-temperature resistant heat-insulating material can improve the heat resistance of the reinforcing component 2, so that the reinforcing component 2 can still maintain the stability of its own structure at a higher temperature, so as to improve the situation where the reinforcing component 2 melts at high temperature, especially when the battery row 1 suffers from thermal runaway, the reinforcing component 2 is not easy to melt, so as to still limit and restrain the battery row 1, while achieving insulation separation of the battery row 1.

[0132] In some embodiments, the reinforcing component 2 includes at least one of a polytetrafluoroethylene member, a polyethylene member, a polystyrene member, a metal member, an alloy member, a carbon fiber member, a mica member, a ceramic member, and a silicon crystal material member.

[0133] It can be understood that when the reinforcing component 2 includes at least two of a polytetrafluoroethylene part, a polyethylene part, a polystyrene part, a metal part, an alloy part, a carbon fiber part, a mica part, a ceramic part and a silicon crystal material part, the reinforcing component 2 may include a structure formed by connecting the above at least two parts by a physical connection method (such as welding, bonding, coating, bolt connection, etc.); for example, the reinforcing component 2 includes a polytetrafluoroethylene part and a polyethylene part, and the two are fixedly connected by physical connection means.

[0134] Exemplarily, when the reinforcing component 2 is an insulating component, the reinforcing component 2 may include at least one of a polytetrafluoroethylene component, a polyethylene component, a polystyrene component, a mica component and a ceramic component; when the reinforcing component 2 includes a strength component and an insulating layer coated on at least the surface of the strength component corresponding to the connecting piece 12, the strength component may include at least one of a metal component, an alloy component and a carbon fiber component, and the insulating layer may include at least one of a polytetrafluoroethylene component, a polyethylene component, a polystyrene component, a mica component, but is not limited thereto.

[0135] In the above technical solution, the reinforcing component 2 may include one or more of the above materials, so that the separator 21 can use suitable materials to adapt to the working environment of the battery 100, which is beneficial to improving the performance of the separator 21.

[0136] Referring to Figures 15 and 16, in some embodiments, the insulation thickness of the reinforcing member 2 at the location of the connecting piece 12 is t1. The insulation thickness corresponding to the area of ​​the connecting piece 12 projected onto the reinforcing member 2 along the third direction is t1, where 1 mm ≤ t1 ≤ 10 mm. For example, the insulation thickness t1 of the reinforcing member 2 at the location of the connecting piece 12 can be 1 mm, 3 mm, 5 mm, 7 mm, 9 mm, or 10 mm, etc.

[0137] In the above technical solution, by setting the reinforcing component 2 to have a suitable insulation thickness at the position of the connecting piece 12, the reinforcing component 2 has sufficient insulation performance at the position of the connecting piece 12, so that the reinforcing component 2 can insulate and separate two adjacent rows of battery rows 1.

[0138] For example, if a mating groove 21b is formed on the side of the separator 21 facing the battery row 1, then the separator 21 may have a mating groove 21b formed on one side or both sides in the third direction. When the mating groove 21b is formed on one side of the separator 21 in the third direction, the insulation thickness between the bottom wall of the mating groove 21b and the surface of the separator 21 away from the mating groove 21b in the third direction is t1. When the mating groove 21b is formed on both sides of the separator 21 in the third direction, if the mating grooves 21b on both sides of the separator 21 face each other, the insulation thickness between the bottom walls of the mating grooves 21 on both sides of the separator 21 in the third direction is t1.

[0139] 15-16 , in some embodiments, the width of the binding portion 22 protruding from the partition portion 21 in the third direction is d, 5mm≤d≤20mm; and / or the thickness of the binding portion 22 is t2, 1mm≤t2≤5mm.

[0140] For example, referring to Figures 15 and 16 , the width of the first pressing edge 221 in the front-to-back direction is d, and the thickness of the first pressing edge 221 is t2. For example, the width d of the tie portion 22 in the third direction can be 5 mm, 8 mm, 10 mm, 15 mm, 17 mm, or 20 mm, etc.; the thickness t2 of the tie portion 22 can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, etc.

[0141] Of course, the binding portion 22 has a suitable width in the third direction and a suitable thickness, so that the binding portion 22 can provide a suitable high-strength binding force to bind the shell 1112 (for example, the binding portion 22 can provide 1Mpa / mm 2 ~20Mpa / mm 2 The binding portion 22 can provide a high-strength binding force to effectively bind the connection between the housing body 1112 and the housing cover 1111. For example, in some examples, the binding portion 22 is a high-strength metal member, and the surface of the binding portion 22 is composited or coated with an insulating material, etc., so that the binding portion 22 can provide a relatively high-strength binding force.

[0142] In the above technical solution, the binding portion 22 is set to have a suitable width in the third direction, so that the first pressing edge 221 of the binding portion 22 can cover at least the connection position between the shell cover 1111 and the shell body 1112 in the third direction, so that the binding portion 22 can effectively bind and support the connection position between the shell body 1112 and the shell cover 1111, so as to improve the structural stability of the connection position between the shell body 1112 and the shell cover 1111; and the binding portion 22 is set to have a suitable thickness, so that the binding portion 22 has a suitable structural strength, so that the first pressing edge 221 of the binding portion 22 can stably limit the expansion and deformation of the multiple battery cells 11 of the battery row 1 at the end where the shell cover 1111 is located, so as to suppress the cracking of the connection position between the shell body 1112 and the shell cover 1111 to a certain extent.

[0143] Please refer to Figures 8 and 13. In some embodiments, the restraining portion 22 further includes two second pressing edges 222 spaced apart along the second direction, each second pressing edge 222 is respectively connected to multiple first pressing edges 221, and each second pressing edge 222 is respectively connected to each first pressing edge 221.

[0144] Exemplarily, the tie portion 22 includes two first pressing edges 221 and two second pressing edges 222, so that the tie portion 22 defines a ring-shaped structure. Furthermore, one end of each first pressing edge 221 is connected to one end of each second pressing edge 222, so that the tie portion 22 forms a ring-shaped structure. Of course, in other examples, the number of first pressing edges 221 can also be greater than the number of second pressing edges 222.

[0145] It can be understood that in the embodiment of the present application, the second pressing edge 222 can be used only to connect the first pressing edge 221 spaced apart along the first direction. In this case, the second pressing edge 22 can be spaced apart from the battery row 1. Alternatively, the second pressing edge 222 can be used not only to connect the first pressing edge 221 spaced apart along the first direction, but also the second pressing edge 222 stops at one end of at least one shell body 1112 of the battery row 1 in the second direction.

[0146] In the above technical solution, by setting a second pressing edge 222 for connecting multiple first pressing edges 221, each second pressing edge 222 can play a certain limiting role in the deformation of the first pressing edge 221 in the first direction, which can improve the structural strength and structural stability of the binding portion 22, and is beneficial to improving the binding effect of the first pressing edge 221 on the shell body 1112, so that the binding effect and support effect of the binding portion 22 on the connection position between the shell body 1112 and the shell cover 1111 can be improved, which is beneficial to further improve the connection reliability between the shell body 1112 and the shell cover 1111.

[0147] 4 and 11 - 12 , in some embodiments, each second pressing edge 222 abuts against one end of at least one shell body 1112 of the battery row 1 in the second direction.

[0148] For example, in conjunction with Figure 12, the binding portion 22 includes two first pressing edges 221 spaced apart along the first direction and two second pressing edges 222 spaced apart along the second direction, and each second pressing edge 222 is respectively connected to the two first pressing edges 221, so that the binding portion 22 forms a ring structure, so that the binding portion 22 can bind one end of the battery row 1 toward the partition 21, and the first pressing edge 221 and the second pressing edge 222 respectively cover the connection position between the shell body 1112 and the shell cover 1111 of the corresponding battery cell 11 of the battery row 1, thereby, the binding portion 22 can effectively bind and support the battery row 1, and can improve the connection strength and stability between the shell body 1112 and the shell cover 1111 of the battery cell 11.

[0149] Exemplarily, the binding portion 22 includes two first pressing edges 221 spaced apart along the first direction and second pressing edges 222 spaced apart along the second direction. Each second pressing edge 222 is respectively connected to the two first pressing edges 221 so that the binding portion 22 forms a ring structure. The binding portion 22 can clamp the end of the battery row 1 (for example, one end of the shell cover 1111 of the battery cell 11 of the battery row 1), so that the reinforcing component 2 has a leakage-proof function to improve the situation where the electrolyte leaked from the battery cell 11 flows to other locations and is prone to corrosion.

[0150] In the above technical solution, by setting the second pressing edge 222 to stop at one end of at least one shell body 1112 of the battery row 1 in the second direction, the second pressing edge 222 can press the shell body 1112 of at least one battery cell 11 of the battery row 1 and cover the connection position between the shell body 1112 and the shell cover 1111. The two second pressing edges 222 can directly or indirectly apply a force to at least the battery cell 11 between them that expands and deforms in the second direction, so as to at least suppress the deformation of the shell body 1112 of all battery cells 11 between the two second pressing edges 222 in the first and second directions at the end where the shell cover 1111 is located. The shape enables the second pressing edge 222 to play a certain restraining and supporting role on the connection position between the shell body 1112 and the shell cover 1111, so that the restraining portion 22 can provide a strong restrictive effect to improve the stability and firmness of the connection between the shell body 1112 and the shell cover 1111. When the battery cell 11 fails or expands due to thermal failure, the risk of cracking or disconnection of the shell 111 at the connection position between the shell body 1112 and the shell cover 1111 is reduced to a certain extent, thereby reducing the occurrence of problems such as high-voltage ignition in the battery 100, reducing the speed of heat diffusion of the battery cell 11, and improving the reliability of the battery 100.

[0151] For example, the width of the tie portion 22 in the third direction is d, 5 mm ≤ d ≤ 20 mm; and / or the thickness of the tie portion 22 is t2, 1 mm ≤ t2 ≤ 5 mm. For example, referring to Figures 15 and 16 , the width of the second pressing edge 222 in the front-to-back direction is d, and the thickness of the second pressing edge 222 is t2.

[0152] Please refer to Figures 9 to 11. In some embodiments, the shell cover 1111 is provided with a pole 112, and a side wall of the shell body 1112 facing away from the shell cover 1111 is provided with a pressure relief structure 114. The battery 100 also includes: a thermal management component 3, the thermal management component 3 includes a heat exchange portion 31 and a discharge portion 32, the heat exchange portion 31 is used for heat exchange with the battery row 1, and the discharge portion 32 is used to receive emissions discharged by the battery row 1 through the pressure relief structure 114, and at least a portion of the discharge portion 32 is thermally connected to the heat exchange portion 31.

[0153] Exemplarily, the pressure relief structure 114 and the shell cover 1111 are located on opposite sides of the shell body 1112, which facilitates the arrangement of the pressure relief structure 114 on the shell body 1112. At the same time, the pressure relief structure 114 is located on the side of the shell body 1112 away from the shell cover 1111, so that the pressure relief structure 114 is correspondingly connected to the discharge portion 32.

[0154] It can be seen that the battery cell 11's own pole 112 and its own pressure relief structure 114 are respectively located on different surfaces of the battery cell 11, so that there is a larger distance between the pole 112 of the battery cell 11 and the pressure relief structure 114, so as to effectively reduce the emission of the battery cell 11 through its own pressure relief structure 114 (for example, in the case of thermal runaway of the battery cell 11), such as particles, which flow to its own pole 112 and cause insulation failure, high-voltage sparking and other problems.

[0155] For example, in combination with Figures 9 to 11 and 12, the shell cover 1111 and the pressure relief structure 114 are located on both sides of the shell body 1112 in the third direction, the shell cover 1111 is provided with a pole 112, and the connecting piece 12 is electrically connected to the pole 112 to electrically connect the multiple battery cells 11 of the battery row 1, the reinforcement component 2 and the thermal management component 3 are provided on both sides of the battery row 1 in the third direction, the thermal management component 3 includes a discharge portion 32 and a heat exchange portion 31, the discharge portion 32 is connected to the pressure relief structure 114 of the corresponding battery row 1, the discharge portion 32 is used to discharge the high-temperature gas in the battery cell 11 in a timely manner when thermal failure occurs, which can reduce the diffusion rate of thermal runaway, and the heat exchange portion 31 is used to exchange heat with the battery row 1 so that the battery 100 is within a suitable temperature range, which is beneficial to improving the performance of the battery 100.

[0156] Among them, at least a part of the discharge part 32 is thermally connected to the heat exchange part 31, so there is heat exchange between a part of the discharge part 32 and the heat exchange part 31, or there is heat exchange between the entire discharge part 32 and the heat exchange part 31. For example, the discharge is the discharge discharged when the battery cell 11 is in thermal runaway. The discharge is discharged through the discharge position of the battery cell 11 (for example, a pressure relief structure 114 is provided at the discharge position). The temperature of the discharge is relatively high. The heat exchange part 31 exchanges heat with the discharge part 32, so that the heat exchange part 31 can not only dissipate the heat of the discharge in time through the discharge to avoid heat from being concentrated in the vicinity of the discharge position of the battery cell 11 (for example, the pressure relief structure 114) for a long time, but also cool the discharge to reduce the probability of thermal runaway of the battery cell 11 spreading.

[0157] It can be understood that at least a portion of the discharge portion 32 is thermally connected to the heat exchange portion 31, which means that the discharge portion 32 is directly or indirectly connected to the heat exchange portion 31 so that at least a portion of the discharge portion 32 and the heat exchange portion 31 remain relatively stationary, and at the same time, there is heat exchange between at least a portion of the discharge portion 32 and the heat exchange portion 31, then at least a portion of the discharge portion 32 is in direct contact with the heat exchange portion 31 to achieve heat exchange, or at least a portion of the discharge portion 32 is indirectly coordinated with the heat exchange portion 31 through a heat conductor to achieve heat exchange.

[0158] In the above technical solution, by setting up a thermal connection between at least a portion of the discharge portion 32 and the heat exchange portion 31, the heat of the battery cell 11 when thermal failure occurs can be dissipated in a timely manner. At the same time, the heat exchange portion 31 can also cool the battery cell 11 to reduce the probability of thermal runaway of the battery cell 11 spreading.

[0159] Referring to FIG. 4 , in some embodiments, there are multiple battery rows 1 and the multiple rows of battery rows 1 are arranged sequentially along a third direction. There are multiple reinforcing components 2 and thermal management components 3 , respectively, and the multiple reinforcing components 2 and thermal management components 3 are alternately arranged one by one along the third direction.

[0160] For example, in combination with Figures 4 and 12, multiple rows of battery rows 1 are arranged in sequence along the third direction, and each row of battery rows 1 includes multiple battery cells 11 arranged in sequence along the first direction and the second direction. The shell cover 1111 and the pressure relief structure 114 are respectively located on both sides of the shell body 1112 in the third direction, the shell cover 1111 is provided with a pole 112, and the connecting piece 12 is used to connect with the pole 112 to electrically connect the multiple battery cells 11 of the battery row 1, the reinforcement component 2 is provided between two adjacent rows of battery rows 1, and the thermal management component 3 is provided between two adjacent rows of battery rows 1, and the multiple reinforcement components 2 and the multiple thermal management components 3 are alternately arranged in sequence along the third direction, a thermal management component 3 is provided between two adjacent reinforcement components 2, a reinforcement component 2 is provided between two adjacent thermal management components 3, and a row of battery rows 1 is provided between adjacent reinforcement components 2 and thermal management components 3, and the reinforcement component 2 is provided between the side of the shell cover 1111 corresponding to the two adjacent rows of battery rows 1, that is, the battery cells 11 of the two adjacent rows of battery rows 1 correspond One end of the shell cover 1111 faces the same reinforcement component 2. The partition 21 of the reinforcement component 2 insulates and separates the two adjacent rows of battery rows 1, and the restraining portions 22 located on both sides of the partition 21 in the third direction respectively restrain the corresponding battery rows 1 (for example, the connection position between the shell body 1112 of the battery row 1 and the shell cover 1111). The thermal management component 3 is arranged between one side of the pressure relief structure 114 corresponding to the two adjacent rows of battery rows 1, that is, one end of the pressure relief structure 114 corresponding to the battery cells 11 of the two adjacent rows of battery rows 1 faces the same thermal management component 3. The thermal management component 3 includes two discharge portions 32 and a heat exchange portion 31. The two discharge portions 32 are located on both sides of the heat exchange portion 31 in the third direction. Each discharge portion 32 is connected to the pressure relief structure 114 of the corresponding battery row 1. The discharge portion 32 is used to promptly discharge high-temperature gas in the battery cell 11 when thermal failure occurs. The heat exchange portion 31 is used to exchange heat with the two adjacent rows of battery rows 1 so that the battery 100 is within a suitable temperature range. Of course, the present application is not limited to this. A reinforcement component 2 or a thermal management component 3 may also be provided between the battery row 1 and the battery case 101; two reinforcement components 2 may be provided between two adjacent battery rows 1, and / or two thermal management components 3 may be provided between two adjacent battery rows 1.

[0161] In the above technical solution, by arranging multiple reinforcement components 2 and thermal management components 3 alternately along the third direction, the structural design of the battery 100 is made more compact and reasonable. Under the premise that the battery 100 has appropriate heat dissipation performance under the action of the heat exchange part 31, the discharge part 32 can discharge the high-temperature gas in the battery cell 11 in time when thermal failure occurs, and the restraining part 22 can restrain the shell 1112 of the battery row 1, thereby suppressing the continued occurrence of thermal failure and reducing the probability of thermal runaway of the battery 100.

[0162] 11-12, in some embodiments, the battery cell 11 further includes a pole 112 and an electrode assembly 113, the pole 112 is provided on the shell cover 1111, the electrode assembly 113 includes an active material coating portion 1131 and a pole ear portion 1132, the pole ear portion 1132 is electrically connected to the pole 112 and the active material coating portion 1131, respectively, the distance between the end of the restraining portion 22 away from the partition 21 and the inner wall of the shell cover 1111 is x1, the active material coating portion 1131 is electrically connected to the pole ear portion 1132, and the distance between the end of the restraining portion 22 away from the partition 21 and the inner wall of the shell cover 1111 is x1. The distance between the end of the covering portion 1131 facing the shell cover 1111 and the inner wall of the shell cover 1111 is x2, x1≤x2; or, the active material coating portion 1131 includes an edge portion 1131a and a center portion 1131b arranged in sequence along the third direction, the thickness of the edge portion 1131a is smaller than the thickness of the center portion 1131b, and the distance between the end of the edge portion 1131a facing away from the shell cover 1111 and the inner wall of the shell cover 1111 is x3, x1≤x3.

[0163] Among them, the distance between the end of the binding portion 22 away from the partition portion 21 and the inner wall of the shell cover 1111 is less than or equal to the distance between the end of the active material coating portion 1131 facing the shell cover 1111 and the inner wall of the shell cover 1111. In this way, the binding portion 22 does not cover the part of the active material coating portion 1131 corresponding to the shell 111, and the binding portion 22 constrains the non-main expansion area of ​​the battery cell 11 (for example, the residual space position without JR), which can reduce the influence of the binding portion 22 on the expansion of the battery cell 11 to a certain extent, and is conducive to improving the situation of lithium deposition in the active material coating portion 1131 to a certain extent, thereby helping to improve the performance of the battery cell 11. At the same time, the binding portion 22 can cover the appropriate part of the shell 111 in the third direction, which is conducive to improving the binding effect of the binding portion 22 on the battery row 1

[0164] Among them, the distance between the end of the binding portion 22 away from the partition portion 21 and the inner wall of the shell cover 1111 is less than or equal to the distance between the end of the edge portion 1131a away from the shell cover 1111 and the inner wall of the shell cover 1111. In this way, the binding portion 22 does not cover the part of the central portion 1131b corresponding to the shell 111, and the binding portion 22 covers the non-main expansion area of ​​the battery cell 11, which can reduce the influence of the binding portion 22 on the expansion area of ​​the battery cell 11 to a certain extent, which is beneficial to improve the lithium deposition and other situations of the active material coating portion 1131 to a certain extent. At the same time, the binding portion 22 can cover a larger part of the shell 111 in the third direction, which is beneficial to improve the binding effect of the binding portion 22 on the battery row 1.

[0165] It is understood that the area of ​​the housing 111 corresponding to the active material coating 1131 is the primary expansion area of ​​the battery cell 11, and the amount of expansion of the central portion 1131b corresponding to the expansion area of ​​the battery cell 11 is generally greater than the amount of expansion of the edge portion 1131a corresponding to the expansion area of ​​the battery cell 11. The active material coating 1131 is the portion of the electrode assembly coated with active material, which assists in the intercalation and deintercalation of metal ions during the charge and discharge of the battery cell 11. The active material coating thickness in the central portion 1131b is greater than that in the edge portion 1131a, resulting in the thickness of the edge portion 1131a being less than that of the central portion 1131b. The edge portion 1131a can be formed as a JR thinning region.

[0166] For example, the battery 100 includes a battery case 101, which includes a first case 101a and a second case 101b. The portion of the first case 101a or the second case 101b corresponding to the restraining portion 22 can be locally thinned (for example, a clearance groove is formed in the first case 101a and the second case 101b corresponding to the restraining portion 22). This can reduce the impact of the restraining portion 22 on the size of the battery 100 in the first direction and / or the second direction, and to a certain extent reduce the space occupied by the restraining portion 22 for the arrangement of the battery cells 11, thereby reducing the loss of energy density of the battery 100. Therefore, by providing the reinforcing component 2 and locally thinning the portion of the battery case 101 corresponding to the restraining portion 22, the extent of damage to the battery 100 caused by a collision, etc. can be minimized, provided that the battery 100 has an appropriate energy density.

[0167] In the above technical solution, by setting the distance between the end of the restraining portion 22 away from the partition portion 21 and the inner wall of the shell cover 1111 to be less than or equal to the distance between the end of the active material coating portion 1131 facing the shell cover 1111 and the inner wall of the shell cover 1111, or the distance between the end of the edge portion 1131a away from the shell cover 1111 and the inner wall of the shell cover 1111, the influence of the restraining portion 22 on the expansion area of ​​the battery cell 11 can be reduced to a certain extent, which is beneficial to avoid lithium deposition and the like in the active material coating portion 1131 to a certain extent. At the same time, the restraining portion 22 can cover an appropriate length of the shell 111 in the third direction, which is beneficial to improve the restraining effect of the restraining portion 22 on the battery row 1 (for example, the connection position between the shell cover 1111 and the shell body 1112).

[0168] In a second aspect, an embodiment of the present application provides an electrical device 1000 , comprising the above-mentioned battery 100 , and the battery 100 is used to provide electrical energy.

[0169] In the above technical solution, by providing the battery 100 to provide electric energy to the electric device 1000 , the reliability of the electric device 1000 can be improved.

[0170] For example, in combination with Figures 2 to 4 and Figure 8, taking the first direction as the up-down direction, the second direction as the left-right direction, and the third direction as the front-to-back direction as an example, the battery 100 includes multiple rows of battery rows 1 arranged in sequence along the front-to-back direction, each row of battery rows 1 includes multiple battery cells 11 arranged in sequence along the up-down direction and the left-to-right direction, and the shell 111 of the battery cell 11 includes a shell body 1112 and a shell cover 1111, and the shell cover 1111 is connected to the front end or the rear end of the shell body 1112; the battery 100 also includes a reinforcing component 2 and a thermal management component 3, the reinforcing component 2 is arranged between two adjacent rows of battery rows 1 and is opposite to the shell covers 1111 of the above-mentioned two adjacent rows of battery rows 1, and the thermal management component 3 is arranged between two adjacent rows of battery rows 1 and is opposite to the shell bodies 1112 of the above-mentioned two adjacent rows of battery rows 1, and the multiple reinforcing components 2 and the multiple thermal management components 3 are alternately arranged in sequence along the front-to-back direction, a thermal management portion 3 is provided between two adjacent reinforcing components 2, and a reinforcing component 2 is provided between two adjacent thermal management components 3. For each battery cell 11 , the length of the battery cell 11 in the front-to-back direction is greater than the length of the battery cell 11 in the left-to-right direction, and the length of the battery cell 11 in the left-to-right direction is greater than the length of the battery cell 11 in the up-to-down direction. At this time, the battery cell 11 is arranged flat.

[0171] The shell body 1112 of each battery cell 11 is open on one side facing the reinforcement component 2, the shell cover 1111 is connected to the open end 111a of the shell body 1112, the shell cover 1111 is provided with a pole 112, and the end of the shell body 1112 of each battery cell 11 facing away from the shell cover 1111 is closed, and a pressure relief structure 114 is provided on the side of the shell body 1112 facing the thermal management component 3.

[0172] The reinforcing component 2 includes a partition 21 and a binding portion 22. The partition 21 insulates and separates two adjacent rows of battery rows 1. Binding portions 22 are respectively provided on the front and rear sides of the partition 21. Each binding portion 22 is formed into an annular structure and includes two first pressing edges 221 spaced apart in the upper and lower directions and two second pressing edges 222 spaced apart in the left and right directions. Each first pressing edge 221 extends in the left and right directions and its two ends are respectively connected to the two second pressing edges 222; each binding portion 22 is respectively clamped on the outer peripheral side of the corresponding battery row 1, so that the two first pressing edges 221 respectively stop at the two ends of the corresponding battery row 1 in the upper and lower directions, and the two second pressing edges 222 respectively stop at the two ends of the corresponding battery row 1 in the left and right directions, so as to limit the expansion and deformation of the battery row 1, thereby protecting the connection position between the shell body 1112 and the shell cover 1111.

[0173] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0174] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, wherein: include: A battery row, the battery row comprising a connecting piece and a plurality of battery cells arranged sequentially along a first direction and / or a second direction, the housing of each battery cell comprising a shell body and a shell cover, the shell bodies of the battery row being open on the same side in a third direction, the shell cover being connected to the open end of the shell body, the connecting piece being provided on a side of the shell cover facing away from the shell body and being used to electrically connect the plurality of battery cells in the battery row, the first direction, the second direction, and the third direction intersecting in pairs; A reinforcing component, the reinforcing component includes a partition and a binding portion, the partition is provided on a side of the battery row corresponding to the shell cover in the third direction to insulate and separate the battery rows, the binding portion is provided on the partition and protrudes from the partition in the third direction, the binding portion includes a plurality of first pressing edges spaced apart along the first direction, each of the first pressing edges extends along the second direction and respectively stops at one end of at least one shell body of the battery row in the first direction.

2. The battery according to claim 1, wherein The wall with the largest surface area in the shell body is the first wall. There are two first walls that are spaced apart along the first direction, and each first wall is connected to the shell cover.

3. The battery according to claim 1 or 2, wherein The battery rows are in multiple rows and are arranged in sequence along the third direction. A reinforcing component for insulating and separating the two adjacent rows of battery rows is provided between the two adjacent rows of battery rows, and the reinforcing component provided between the two adjacent rows of battery rows includes two restraining portions respectively provided on both sides of the partition portion in the third direction.

4. The battery according to any one of claims 1 to 3, wherein The restraining portion is integrally formed with the partition portion.

5. The battery according to any one of claims 1 to 4, wherein A liquid storage portion is formed on a side of the partition facing the battery row.

6. The battery according to claim 5, wherein The liquid storage portion is a groove formed on the partition; or, the liquid storage portion is an adsorption member provided on the partition and capable of adsorbing electrolyte.

7. The battery according to any one of claims 1 to 6, wherein A matching groove is formed on a side of the partition facing the battery row, and at least a portion of the connecting piece is accommodated in the matching groove.

8. The battery according to claim 7, wherein A receiving groove is formed on the groove wall of the matching groove; and / or an adsorption member capable of adsorbing electrolyte is provided on the groove wall of the matching groove.

9. The battery according to any one of claims 1 to 8, wherein The reinforcing member is an insulating member; or The reinforcing component includes a strength member and an insulating layer coated on at least a surface of the strength member corresponding to the connecting piece, wherein the insulating layer is used for insulating and isolating the strength member and the connecting piece.

10. The battery according to claim 9, wherein When the reinforcing member is an insulating member, The melting point of the insulating member is greater than or equal to 250° C.; and / or, The resistivity of the insulating member is greater than or equal to 100 MΩ / mm.

11. The battery according to claim 9, wherein When the reinforcing member includes a strength member and an insulating layer, the melting point of the strength member is greater than or equal to 250°C. The insulating layer is made of a high temperature resistant heat insulating material; and / or, The resistivity of the insulating layer is greater than or equal to 100 MΩ / mm.

12. The battery according to any one of claims 9 to 11, wherein The reinforcing component includes at least one of a polytetrafluoroethylene component, a polyethylene component, a polystyrene component, a metal component, an alloy component, a carbon fiber component, a mica component, a ceramic component and a silicon crystal material component.

13. The battery according to any one of claims 9 to 12, wherein The insulation thickness of the reinforcement component at the position of the connecting piece is t1, 1mm≤t1≤10mm.

14. The battery according to any one of claims 1 to 13, wherein The width of the restraining portion protruding from the partition portion in the third direction is d, 5mm≤d≤20mm; and / or, The thickness of the restraining portion is t2, 1mm≤t2≤5mm.

15. The battery according to any one of claims 1 to 14, wherein The restraining portion further includes two second pressing edges spaced apart along the second direction, and each of the second pressing edges is respectively connected to a plurality of the first pressing edges.

16. The battery according to claim 15, wherein Each of the second pressing edges is respectively stopped at one end of at least one shell body of the battery row in the second direction.

17. The battery according to any one of claims 1 to 16, wherein The shell cover is provided with a pole, and a side wall of the shell body facing away from the shell cover is provided with a pressure relief structure. The battery further includes: A thermal management component includes a heat exchange portion and a discharge portion, wherein the heat exchange portion is used to exchange heat with the battery row, and the discharge portion is used to receive exhaust discharged from the battery row through the pressure relief structure, and at least a portion of the discharge portion is thermally connected to the heat exchange portion.

18. The battery according to claim 17, wherein The battery rows are in multiple rows and are sequentially arranged along the third direction. There are multiple reinforcing components and multiple thermal management components, and the multiple reinforcing components and the thermal management components are alternately arranged one by one along the third direction.

19. The battery according to any one of claims 1 to 18, wherein The battery cell further includes a pole and an electrode assembly, wherein the pole is provided on the shell cover, and the electrode assembly includes an active material coating portion and a pole ear portion, wherein the pole ear portion is electrically connected to the pole and the active material coating portion, respectively. The distance between the end of the restraining portion away from the partition and the inner wall of the shell cover is x1. The distance between the end of the active material coating portion facing the shell cover and the inner wall of the shell cover is x2, x1≤x2; or The active material coating portion includes an edge portion and a center portion sequentially arranged along the third direction, the thickness of the edge portion is smaller than the thickness of the center portion, and the distance between the end of the edge portion away from the shell cover and the inner wall of the shell cover is x3, x1≤x3.

20. An electrical device, wherein: The invention comprises a battery according to any one of claims 1 to 19, wherein the battery is used to provide electrical energy.

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