Battery and electric device with same

Abstract

The utility model discloses a battery and a power utilization device with the battery, the battery comprises a battery row and a reinforcing part, the battery row comprises a connecting sheet and a plurality of battery monomers, a shell of each battery monomer comprises a shell body and a shell cover, and the connecting sheet is arranged on one side, deviating from the shell body, of the shell cover and is used for electrically connecting the plurality of battery monomers of the battery row; the reinforcing part comprises a separation part and a binding part, the separation part is arranged on one side, corresponding to the shell cover, of the battery row in the third direction so as to insulate and separate the battery row, and the binding part is arranged on the separation part and extends out of the separation part in the third direction and comprises a plurality of first pressing edges which are arranged at intervals in the first direction; each first pressing edge extends in the second direction and abuts against one end, in the first direction, of at least one shell body of the battery row. According to the battery provided by the embodiment of the invention, the binding part can improve the connection stability and firmness of the connection position of the shell body and the shell cover, and the use reliability of the battery is improved.

Description

Technical Field

[0001] 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

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable and important role. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of energy density and reliability. However, in related technologies, the unreasonable design of battery structure makes the battery reliability poor. Utility Model Content

[0003] The present application provides a battery and an electrical device having the same, wherein the binding portion can bind 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.

[0004] 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 is open on the same side in a third direction, the shell cover is connected to the open end of the shell body, the connecting piece is arranged 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 in pairs; a reinforcing component, the reinforcing component comprising a partition and a binding portion, the partition is arranged 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 is arranged on the partition and protrudes from the partition in the third direction, the binding portion comprises a plurality of first pressing edges arranged at intervals 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.

[0005] In the above technical solution, since the partition part is arranged on one side of the battery row corresponding to the shell cover in the third direction, the partition part can achieve insulation between adjacent two battery rows, or insulation between the battery row and the battery box body, etc., and can reduce the probability of risks such as short circuits occurring in the battery. By setting the binding part to include a plurality of first pressing edges arranged at intervals in the first direction, and each first pressing edge respectively abuts against at least one shell body of the battery row at one end in the first direction, the first pressing edge can cover the connection position between the shell body of at least one battery cell of the battery row and the shell cover, and the adjacent two first pressing edges can directly or indirectly apply a force to the battery cells that expand and deform between them in the first direction, so as to at least inhibit the deformation of the shell bodies of all the battery cells between the adjacent two first pressing edges at the end where the shell cover is located in the first direction to a certain extent, so that the first pressing edge can play a certain binding and supporting role on the connection position between the shell body and the shell cover, so that the binding part 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 cracking or disconnection at the connection position between the shell body and the shell cover to a certain extent in the case of thermal failure or expansion of the battery cell, etc., thereby reducing or avoiding the occurrence of problems such as high-voltage sparking in the battery or reducing the speed of thermal diffusion of the battery cell.

[0006] In some embodiments, the wall with the largest surface area in the shell body is the first wall, there are two first walls arranged at intervals in the first direction, and each first wall is respectively connected to the shell cover.

[0007] 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 respectively connected to the shell cover, the first pressing edge can abut against 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 with larger expansion amount of the battery cell), and can improve the binding and supporting effects of the binding part on the connection position between the shell body and the shell cover, and can effectively improve the connection stability and reliability of the shell at the connection position between the shell body and the shell cover.

[0008] In some embodiments, there are multiple battery rows arranged in sequence in the third direction, and a strengthening component for insulating and separating the two battery rows is arranged between adjacent two battery rows, and the strengthening component arranged between adjacent two battery rows includes two binding parts respectively arranged on both sides of the partition part in the third direction.

[0009] In the above technical solution, by providing a strengthening member between two adjacent rows of battery rows, and the strengthening member includes two binding portions respectively disposed on two sides of the partition portion in the third direction, such that the two binding portions respectively bind the connection positions of the cell bodies and cell covers of the battery cells in two adjacent rows of battery rows. Thus, one strengthening member can achieve the insulation interval between two adjacent rows of battery rows and the binding of the cell bodies of the battery cells in two adjacent rows of battery rows, which can reduce the number of strengthening members provided and simplify the structural arrangement inside the battery, being beneficial to improving the space utilization rate of the battery cells.

[0010] In some embodiments, the binding portion is integrally formed on the partition portion.

[0011] In the above technical solution, by providing that the binding portion is integrally formed on the partition portion, the overall structural strength of the strengthening member can be improved, which is beneficial to enhancing the stability of the binding portion in binding the battery rows and facilitating the saving of the assembly process between the binding portion and the partition portion.

[0012] In some embodiments, a liquid storage portion is formed on one side of the partition portion facing the battery row.

[0013] In the above technical solution, by providing that a liquid storage portion is formed on one side of the partition portion facing the battery row, the liquid storage portion can store the electrolyte leaked from the battery cell towards the side where the partition portion is located, etc., which can improve the outflow situation of the electrolyte leaked from the battery row and reduce the harm (such as corrosion) of the leaked electrolyte, etc. to other components (such as other battery rows or the battery box body, etc.), thereby reducing the degree of damage to the battery caused by the leakage of the electrolyte, etc.

[0014] In some embodiments, the liquid storage portion is a groove formed on the partition portion; or, the liquid storage portion is an adsorbent member provided on the partition portion and capable of adsorbing the electrolyte.

[0015] In the above technical solution, by providing that the liquid storage portion is a groove formed on the partition portion, the groove can store the electrolyte leaked from the battery cell, etc., or by providing that the liquid storage portion is an adsorbent member provided on the partition portion and capable of adsorbing the electrolyte, the adsorbent member can adsorb the leaked electrolyte, etc., to improve the outflow situation of the electrolyte leaked from the battery row, with a simple structure and being easy to implement.

[0016] In some embodiments, a mating groove is formed on one side of the partition portion facing the battery row, and at least part of the connecting piece is received in the mating groove.

[0017] In the above technical solution, by arranging at least a part of the connecting piece to be received in the fitting groove, the fitting groove can space the corresponding connecting piece from the adjacent connecting piece, and to a certain extent, the connecting pieces can be insulated from each other, which can reduce the probability of risks such as short circuits in the battery. At the same time, the fitting groove can play a certain binding role, so that the fitting groove can bind the connecting piece to maintain the stability of its own shape and reduce the possibility of deformation of the connecting piece.

[0018] In some embodiments, a receiving groove is formed on the groove wall of the fitting groove; and / or, an adsorbent for adsorbing electrolyte is provided on the groove wall of the fitting groove.

[0019] In the above technical solution, by forming a receiving groove on the groove wall of the fitting groove or arranging an adsorbent, while improving the stability of the arrangement of the connecting piece, the receiving groove or the adsorbent can store leaked electrolyte, etc., so as to improve the outflow situation of the electrolyte leaked from the battery row, and reduce the harm such as corrosion to other components such as other battery rows or the battery box, etc. caused by the leaked electrolyte, etc., thereby reducing the degree of damage to the battery caused by the leakage of electrolyte, etc.

[0020] In some embodiments, the strengthening component is an insulating member; or, the strengthening component includes a strength member and an insulating layer at least coated on the surface of the strength member corresponding to the connecting piece, and the insulating layer is used for insulating and isolating the strength member and the connecting piece.

[0021] In the above technical solution, by setting the strengthening component as an insulating member, or at least coating an insulating layer on the surface of the strength member corresponding to the connecting piece, insulation between the strengthening component and the connecting piece can be achieved, so as to achieve insulation between the strengthening component and the battery row, and reduce the probability of risks such as short circuits in the battery.

[0022] In some embodiments, when the strengthening 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.

[0023] In the above technical solution, by setting the insulating member to have a suitable melting point, the strengthening component has good high-temperature resistance, so that the strengthening component has the effects of insulation and heat insulation, which can reduce the probability of melting of the strengthening component, thereby reducing the risk of battery short circuits, etc.; by setting the insulating member to have a suitable resistivity, good insulation performance can still be maintained between adjacent battery rows under a relatively high voltage.

[0024] In some embodiments, when the strengthening 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 and heat-insulating material member; and / or, the resistivity of the insulating layer is greater than or equal to 100 MΩ / mm.

[0025] 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 relatively high temperature, facilitating the enhancement of the heat insulation ability of the reinforcement component. The insulating layer is a high-temperature resistant heat insulation material component, which can further improve the heat insulation and heat resistance abilities of the reinforcement component; the insulating layer has a suitable resistivity, which can improve the insulation effect of the reinforcement component. Of course, setting the strength member to have a suitable melting point and / or setting the insulating layer as a high-temperature resistant heat insulation material can enhance the heat resistance ability of the reinforcement component, facilitating the reinforcement component to maintain the stability of its own structure at a relatively high temperature, so as to improve the situation of high-temperature melting of the reinforcement component.

[0026] In some embodiments, the reinforcement component includes 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.

[0027] In the above technical solution, the reinforcement component can be composed of one or more materials, so that the reinforcement component can adopt appropriate materials to adapt to the working environment of the battery, which is conducive to improving the performance of the reinforcement component.

[0028] In some embodiments, the insulation thickness of the reinforcement component at the connecting piece position is t1, and 1 mm ≤ t1 ≤ 10 mm.

[0029] In the above technical solution, by setting the reinforcement component to have a suitable insulation thickness at the connecting piece position, the reinforcement component has sufficient insulation performance at the connecting piece position, so that the reinforcement component can insulate and separate adjacent two rows of battery rows.

[0030] In some embodiments, the width by which the binding portion protrudes from the separation portion in the third direction is d, and 5 mm ≤ d ≤ 20 mm; and / or, the thickness of the binding portion is t2, and 1 mm ≤ t2 ≤ 5 mm.

[0031] In the above technical solution, by setting the binding portion to have a suitable width in the third direction, the first pressing edge of the binding portion can cover at least the connection position of the shell cover and the shell body in the third direction, so that the binding portion can effectively bind and support the connection position of the shell body and the shell cover, thereby enhancing the structural stability of the connection position of the shell body and the shell cover; and by setting the binding portion to have a suitable thickness, the binding portion has a suitable structural strength, so that the first pressing edge of the binding portion can stably limit the expansion deformation of the multiple battery monomers of the battery row at the end where the shell cover is located, so as to inhibit the cracking of the connection position of the shell body and the shell cover to a certain extent.

[0032] In some embodiments, the binding portion further includes two second pressing edges spaced apart in the second direction, and each second pressing edge is respectively connected to a plurality of first pressing edges.

[0033] In the above technical solution, by providing a second crimping edge for connecting a plurality of first crimping edges, each second crimping edge can play a certain restrictive role in the deformation of the first crimping edge in the first direction, which can improve the structural strength and structural stability of the binding part, is conducive to improving the binding effect of the first crimping edge on the housing body, so that the binding effect and the supporting effect of the binding part on the connection position between the housing body and the housing cover can be improved, and is conducive to further improving the connection reliability between the housing body and the housing cover.

[0034] In some embodiments, each second crimping edge abuts against at least one end of the housing body of the battery row in the second direction.

[0035] In the above technical solution, by providing the second crimping edge to abut against at least one end of the housing body of the battery row in the second direction, the second crimping edge can cover the connection position between the housing body and the housing cover of at least one battery cell of the battery row. Two second crimping edges can directly or indirectly apply forces to at least the battery cells that expand and deform in the second direction between them, so as to at least inhibit the deformation of the housing bodies of all the battery cells between the two second crimping edges in the first direction and the second direction at the end where the housing cover is located to a certain extent, so that the second crimping edge can play a certain binding and supporting role on the connection position between the housing body and the housing cover, so that the binding part can provide a strong restrictive effect to improve the connection stability and reliability of the housing at the connection position between the housing body and the housing cover, and can avoid cracking or disconnection of the housing at the connection position between the housing body and the housing cover to a certain extent in the case of thermal failure or expansion of the battery cell, etc., thereby reducing the occurrence of problems such as high-voltage sparking in the battery and reducing the speed of thermal diffusion of the battery cell.

[0036] In some embodiments, the housing cover is provided with a pole column, and a pressure relief structure is provided on the side wall of the housing body facing away from the housing cover. The battery further includes: a thermal management component, which includes a heat exchange part and an emission part. The heat exchange part is used for heat exchange with the battery row, and the emission part is used for receiving the emissions discharged by the battery row through the pressure relief structure. At least part of the emission part is thermally connected to the heat exchange part.

[0037] In the above technical solution, by providing at least part of the emission part to be thermally connected to the heat exchange part, the heat generated when the battery cell fails thermally can be evacuated in time, and at the same time, the heat exchange part can also cool down the battery cell to reduce the probability of thermal runaway spread of the battery cell.

[0038] In some embodiments, the battery rows are multiple rows and are arranged in sequence in the third direction. The strengthening components and the thermal management components are respectively multiple, and the multiple strengthening components and the thermal management components are arranged alternately in the third direction one by one.

[0039] In the above technical solution, by arranging a plurality of strengthening components and heat management components to be alternately arranged one by one in the third direction, the structural design of the battery is made more compact and reasonable, so that under the premise that the battery can have appropriate heat dissipation performance under the action of the heat exchange part, the discharge part can timely discharge the high-temperature gas in the battery cell when thermal failure occurs, and the binding part can bind the casing of the battery row, thereby suppressing the continuous occurrence of thermal failure and reducing the probability of battery thermal runaway.

[0040] In some embodiments, the battery cell further includes a pole column and an electrode assembly. The pole column is arranged on the cell cover. The electrode assembly includes an active material coating part and a pole ear part. The pole ear parts are electrically connected to the pole column and the active material coating part respectively. The distance between one end of the binding part far from the partition part and the inner wall of the cell cover is x1, and the distance between one end of the active material coating part facing the cell cover and the inner wall of the cell cover is x2, where x1 ≤ x2; alternatively, the active material coating part includes an edge part and a central part arranged in sequence in the third direction, the thickness of the edge part is less than that of the central part, and the distance between one end of the edge part facing away from the cell cover and the inner wall of the cell cover is x3, where x1 ≤ x3.

[0041] In the above technical solution, by setting the distance between one end of the binding part far from the partition part and the inner wall of the cell cover to be less than or equal to the distance between one end of the active material coating part facing the cell cover and the inner wall of the cell cover, or the distance between one end of the edge part facing away from the cell cover and the inner wall of the cell cover, the influence of the binding part on the expansion area of the battery cell can be reduced to a certain extent, which is beneficial to avoiding the occurrence of lithium plating and other situations in the active material coating part to a certain extent. At the same time, the binding part can cover an appropriate length of the casing in the third direction, which is beneficial to improving the binding effect of the binding part on the battery row.

[0042] In a second aspect, an embodiment of the present application provides an electrical device, including the above battery, and the battery is used to provide electrical energy.

[0043] In the above technical solution, by setting the battery to provide electrical energy for the electrical device, the reliability of the electrical device can be improved.

[0044] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0046] Figure 1 is a schematic diagram of an electrical device provided by some embodiments of the present application;

[0047] Figure 2Explosion schematic diagram of the battery provided by some embodiments of the present application;

[0048] Figure 3 Schematic diagram of the battery cell provided by some embodiments of the present application;

[0049] Figure 4 Another schematic diagram of the battery provided by some embodiments of the present application;

[0050] Figure 5 is Figure 4 Enlarged view of part A shown in

[0051] Figure 6 Another schematic diagram of the battery provided by some embodiments of the present application;

[0052] Figure 7 Schematic diagram of the battery row and the strengthening member provided by some embodiments of the present application;

[0053] Figure 8 Explosion schematic diagram of the battery row and the strengthening member provided by some embodiments of the present application;

[0054] Figure 9 Cross-sectional view of the battery row and the strengthening member provided by some embodiments of the present application;

[0055] Figure 10 Cross-sectional view of the battery row provided by some embodiments of the present application;

[0056] Figure 11 is Figure 10 Enlarged view of part B shown in

[0057] Figure 12 Partial cross-sectional view of the battery cell provided by some embodiments of the present application;

[0058] Figure 13 Schematic diagram of the strengthening member provided by some embodiments of the present application;

[0059] Figure 14 Another schematic diagram of the strengthening member provided by some embodiments of the present application;

[0060] Figure 15 Structural schematic diagram of the strengthening member provided by some embodiments of the present application;

[0061] Figure 16 Another structural schematic diagram of the battery cell provided by some embodiments of the present application.

[0062] Reference numerals:

[0063] Electrical device 1000, controller 200, motor 300,

[0064] Battery 100, battery box 101, first box 101a, second box 101b,

[0065] Battery row 1, battery cell 11, housing 111, open end 111a, housing cover 1111, housing body 1112, first wall 1112a, terminal post 112, electrode assembly 113, active material coating portion 1131, edge portion 1131a, central portion 1131b, tab 1132, pressure relief structure 114, connecting piece 12, reinforcing member 2, partition portion 21, liquid storage portion 21a, mating groove 21b, restraint portion 22, first crimp 221, second crimp 222, thermal management member 3, heat exchange portion 31, discharge portion 32. Detailed implementation manners

[0066] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0067] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects, rather than to describe a specific order or primary-secondary relationship.

[0068] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0069] The term "and / or" in the present application is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0070] In the embodiments of the present application, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings are only illustrative and should not constitute any limitation to the present application.

[0071] The term "a plurality of" as used in the present application means two or more (including two).

[0072] In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of the present application are not limited thereto. The battery cell may be in a cylindrical shape, a flat shape, a cuboid shape or other shapes, and the embodiments of the present application are not limited thereto either. Generally, the battery cells are divided into three types according to the packaging method: cylindrical battery cells, square battery cells and pouch battery cells, and the embodiments of the present application are not limited thereto.

[0073] The battery mentioned in the embodiments of the present application refers to a single physical module including a plurality of battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may be a battery module or a battery pack, etc. The battery module generally includes a plurality of battery cells. The battery generally includes a battery box for encapsulating a plurality of battery cells or a plurality of battery rows, and the battery box can prevent liquids or other foreign matters from affecting the charging or discharging of the battery cells; of course, the battery may also not include a battery box.

[0074] Exemplarily, the battery cell generally may include a housing, a battery core assembly and an electrolyte. The housing is used to accommodate the battery core assembly and the electrolyte, and at least one positive electrode terminal and at least one negative electrode terminal are provided on the housing. The battery core assembly includes one or more electrode assemblies, and the electrode assembly is formed by laminating or winding a positive electrode plate, a negative electrode plate and a separator.

[0075] Among them, the positive electrode plate generally may include 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), and the positive electrode current collector without the positive electrode active material layer coated thereon protrudes from the positive electrode current collector with the positive electrode active material layer coated thereon. The positive electrode current collector without the positive electrode active material layer coated thereon serves as the positive electrode tab, and a plurality of stacked positive electrode tabs can form a positive electrode tab portion and form an electrical connection with the positive electrode terminal. Exemplarily, a plurality of stacked positive electrode tabs can be directly welded to the positive electrode terminal to form an electrical connection; or, the electrode assembly may further include a positive electrode adapter plate. A plurality of stacked positive electrode tabs are welded to one end of the positive electrode adapter plate, and the other end of the positive electrode adapter plate is welded to the positive electrode terminal, so that the positive electrode tab forms an electrical connection with the positive electrode terminal.

[0076] The negative electrode tab generally may 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 without the negative electrode active material layer coated thereon protrudes from the negative electrode current collector with the negative electrode active material layer coated thereon. The negative electrode current collector without the negative electrode active material layer coated thereon serves as the negative electrode tab. A plurality of stacked negative electrode tabs can form a negative electrode tab portion and form an electrical connection with the negative electrode terminal. Exemplarily, a plurality of stacked negative electrode tabs can be directly welded to the negative electrode terminal to form an electrical connection; alternatively, the electrode assembly may further include a negative electrode adapter tab. A plurality of stacked negative electrode tabs are welded to one end of the negative electrode adapter tab, and the other end of the negative electrode adapter tab is welded to the negative electrode terminal, so that the negative electrode tab forms an electrical connection with the negative electrode terminal. The material of the separator is not limited. For example, it can be polypropylene or polyethylene, etc.

[0077] The pressure relief structure on the battery cell mentioned in this application is used to release the internal gas of the battery cell when the internal pressure of the battery cell is too high (for example, caused by overcharging, etc.), so as to reduce the internal pressure of the battery cell and prevent the internal pressure of the battery cell from increasing too fast, resulting in deflagration of the battery cell, etc. For example, the pressure relief structure can be an explosion-proof valve, an explosion-proof sheet, etc.

[0078] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, the battery, as the power source of the electric vehicle, plays an irreplaceable and important role. Among them, as the core component of new energy vehicles, the battery has high requirements both in terms of energy density and reliability.

[0079] In the related art, when the charged ends of the battery cells are arranged oppositely, an insulating component is usually arranged between the above-mentioned battery cells to insulate and isolate the opposite battery cells; however, when a battery cell undergoes thermal runaway, the battery cell may crack and fail at the weld on the housing due to gas expansion, etc., and there may be a flame rushing out, which is likely to burn through the above-mentioned insulating component, thereby causing insulation failure between the oppositely arranged battery cells and prone to high-voltage arcing problems, and the reliability of the entire battery is poor.

[0080] Based on the above considerations, in order to improve the reliability of the battery, a battery is proposed. The battery includes a battery row and a strengthening member. The battery row includes connecting pieces and a plurality of battery cells arranged in sequence along a first direction and / or a second direction. The housing of each battery cell includes a cell body and a cell cover. The cell bodies of the battery row are open on the same side in a third direction, and the cell covers are connected to the open ends of the cell bodies. The connecting pieces are arranged on the side of the cell covers facing away from the cell bodies and are used to electrically connect the plurality of battery cells in the battery row. The first direction, the second direction, and the third direction intersect pairwise. The strengthening member includes a separating portion and a binding portion. The separating portion is arranged on the side of the battery row corresponding to the cell covers in the third direction to insulate and separate the battery row. The binding portion is arranged on the separating portion and protrudes from the separating portion in the third direction. The binding portion includes a plurality of first pressing edges arranged at intervals along the first direction. Each first pressing edge extends along the second direction and abuts against at least one end of the cell body of the battery row in the first direction respectively.

[0081] In the above technical solution, by arranging the separating portion on the side of the battery row corresponding to the cell covers in the third direction, the separating portion can achieve insulation between adjacent battery rows, or insulation between the battery row and the battery box body, etc., which can reduce the probability of risks such as battery short circuit. By setting the binding portion to include a plurality of first pressing edges arranged at intervals along the first direction, and each first pressing edge abuts against at least one end of the cell body of the battery row in the first direction respectively, the first pressing edges can cover the connection position between the cell body and the cell cover of at least one battery cell in the battery row. Adjacent two first pressing edges can directly or indirectly apply forces to the battery cells that expand and deform in the first direction between them, so as to at least inhibit the deformation of the cell bodies of all the battery cells between adjacent two first pressing edges at the end where the cell cover is located in the first direction to a certain extent, so that the first pressing edges can play a certain binding and supporting role on the connection position between the cell body and the cell cover, so that the binding portion can provide a certain limiting effect to improve the connection stability and reliability of the housing at the connection position between the cell body and the cell cover, and can avoid cracking or disconnection at the connection position between the cell body and the cell cover of the housing to a certain extent in the case of thermal failure or expansion of the battery cell, etc., thereby reducing or avoiding the occurrence of problems such as high-voltage arcing in the battery or reducing the speed of thermal diffusion of the battery cell.

[0082] An embodiment of the present application provides an electrical device using the battery of the present disclosure as a power source. The electrical device can be, but is not limited to, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc. The electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, etc.

[0083] For the convenience of description, the following embodiments take an electric device as a vehicle as an example to introduce in detail the structures of the electric device and the battery of the present application.

[0084] Please refer to Figure 1 , Figure 1 FIG. 193 is a schematic structural diagram of an electric device 1000 for a vehicle provided in some embodiments of the present application. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. The vehicle is provided with a battery 100, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle. The battery 100 can be used for power supply of the vehicle. For example, the battery 100 can be used as an operating power source of the vehicle. The vehicle may further include a controller 200 and a motor 300. The controller 200 is configured to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle. In some embodiments of the present application, the battery 100 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0085] Please refer to Figure 2 , Figure 2 FIG. 198 is an exploded structural view of a battery cell 11 for the battery 100 provided in some embodiments of the present application. The battery 100 includes a battery box 101 and a plurality of battery cells 11, and the battery cells 11 are accommodated in the battery box 101. Among them, the battery box 101 is used to provide an assembly space for the battery cells 11, and the battery box 101 can adopt various structures. Please refer to Figure 2 , in the embodiments of the present application, the battery box 101 may include a first box body 101a and a second box body 101b. The first box body 101a and the second box body 101b are covered with each other, and the first box body 101a and the second box body 101b jointly define an accommodation cavity for accommodating the battery cells 11. The second box body 101b may be a hollow structure with one end open, and the first box body 101a may be a plate-like structure. The first box body 101a covers the open side of the second box body 101b so that the first box body 101a and the second box body 101b jointly define the accommodation cavity; alternatively, the first box body 101a and the second box body 101b may also both be hollow structures with one side open (such as Figure 2 shown), and the open side of the first box body 101a covers the open side of the second box body 101b. Of course, the battery box 101 formed by the first box body 101a and the second box body 101b can be in various shapes, such as a cylinder, a cuboid, etc.

[0086] In the battery 100, multiple battery cells 11 can be connected in series, parallel, or in a combined series-parallel configuration. A combined series-parallel configuration means that there are both series and parallel connections among multiple battery cells 11. Multiple battery cells 11 can be directly connected in series, parallel, or in a combined series-parallel configuration together, and then the whole formed by multiple battery cells 11 is accommodated within the battery box 101; alternatively, the battery 100 can also be in the form that multiple battery cells 11 are first connected in series, parallel, or in a combined series-parallel configuration to form battery modules, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel configuration to form a whole and are accommodated within the battery box 101. The battery 100 can also include other structures. For example, the battery 100 can also include busbars for realizing electrical connection among multiple battery cells 11.

[0087] Please refer to Figure 3 and Figure 4 , Figure 3 which is a schematic structural diagram of the battery cell 11 provided in some embodiments of the present application. Exemplarily, the battery cell 11 is in the shape of a cuboid, and the height direction of the battery cell 11 (for example, the Z direction in Figure 3 ) is the third direction, the length direction of the battery cell 11 (for example, the Y direction in Figure 3 ) is the second direction, and the thickness direction of the battery cell 11 (for example, the X direction in Figure 3 ) is the first direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs; of course, the corresponding relationship between these three directions of the first direction, the second direction, and the third direction and the height direction, the length direction, and the 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 either. In other embodiments of the present application, the battery cell 11 can also be in the shape of a prism, a flat body, or other shapes, etc.

[0088] Please refer to Figure 4 and Figures 7 - 8 , in an embodiment of the present application, the battery 100 includes a battery row 1. The battery row 1 includes a connecting piece 12 and multiple battery cells 11 arranged in sequence along the first direction and / or the second direction. The housing 111 of each battery cell 11 includes a cell body 1112 and a cell cover 1111. The cell bodies 1112 of the battery row 1 are open on the same side in the third direction, and the cell covers 1111 are connected to the open ends 111a of the cell bodies 1112. The connecting piece 12 is arranged on the side of the cell cover 1111 facing away from the cell body 1112 and is used for electrically connecting the multiple battery cells 11 of the battery row 1 to realize series, parallel, or combined series-parallel connection of the multiple battery cells 11. The first direction, the second direction, and the third direction intersect in pairs.

[0089] Exemplarily, in combination with Figure 4, the first direction, the second direction, and the third direction are perpendicular to each other pairwise. The first direction is the up-down direction, the second direction is the left-right direction, and the third direction is the front-back direction. A plurality of battery cells 11 arranged in sequence in the left-right direction form a battery unit. The battery row 1 includes a plurality of battery units arranged in sequence in the up-down direction. For a single battery row 1, the front end of the housing 1112 of each battery cell 11 of the battery row 1 is open, or the rear end of the housing 1112 of each battery cell 11 of the battery row 1 is open. The housing cover 1111 is connected to the open end 111a of the housing 1112; for example, the housing cover 1111 is welded to the open end 111a of the housing 1112 to form a weld seam at the connection between the housing cover 1111 and the housing 1112. It can be understood that when the front end of the housing 1112 is open, the connecting piece 12 is arranged on the front side of the housing cover 1111; when the rear end of the housing 1112 is open, the connecting piece 12 is arranged on the rear side of the housing cover 1111. Of course, in other examples, two of the first direction, the second direction, and the third direction may also intersect at a non-right angle.

[0090] The battery 100 further includes a strengthening member 2. The strengthening member 2 includes a partitioning portion 21 and a constraining portion 22. The partitioning portion 21 is arranged on one side of the battery row 1 corresponding to the housing cover 1111 in the third direction to insulate the battery row 1. Insulation between adjacent two battery rows 1 can be achieved, or insulation between the battery row 1 and the battery box body 101 can be achieved, etc., reducing the probability of risks such as short circuits occurring in the battery 100. The constraining portion 22 is arranged on the partitioning portion 21, and the constraining portion 22 protrudes from the partitioning portion 21 in the third direction; the constraining portion 22 includes a plurality of first pressing edges 221 arranged at intervals in the first direction. Each first pressing edge 221 extends in the second direction, and each first pressing edge 221 respectively abuts against at least one end of the housing 1112 of the battery row 1 in the first direction.

[0091] Exemplarily, taking the case where there are multiple battery rows 1 and the multiple battery rows 1 are arranged in sequence in the third direction as an example: One of the two ends of the battery cell 11 in the third direction is charged. At this time, the end of the battery cell 11 corresponding to the housing cover 1111 is charged (for example, a positive electrode terminal and a negative electrode terminal are provided on the housing cover 1111 and the positive electrode terminal and the negative electrode terminal are insulated from the housing cover 1111 respectively). For two adjacent battery rows 1 with opposite charged ends, a strengthening member 2 is provided between them; or, both ends of the battery cell 11 in the third direction are charged (for example, the positive electrode terminal is provided at one end of the housing 1112 away from the housing cover 1111 and the housing cover 1111 is used as the negative electrode), then strengthening members 2 can be respectively provided between any two adjacent battery rows 1. Of course, the battery row 1 can also be one row, and the strengthening member 2 is arranged on one side of the battery row 1 corresponding to the housing cover 1111 in the third direction.

[0092] 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 deformation of the shell body 1112 of all battery cells 11 between two adjacent first pressing edges 221 in the first direction to a certain extent, so that the first pressing edge 221 can 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, which is beneficial to improving the connection stability and reliability of the shell body 111 at the connection position between the shell body 1112 and the shell cover 1111, and can avoid the shell body 111 at the connection position between the shell body 1112 and the shell cover 1111 to a certain extent when the battery cell 11 fails or expands due to heat (for example, the air pressure in the battery 100 is too high, 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.

[0093] 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.

[0094] The following description is made by taking the example that the binding portion 22 includes two first pressing edges 221 spaced apart along the first direction:

[0095] For example, the battery row 1 includes a plurality of battery cells 11 arranged in sequence along a first direction. The two outermost battery cells 11 of the battery row 1 in the first direction are respectively a first battery cell and a second battery cell. 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 one side of the housing 1112 of the first battery cell away from the second battery cell, and the other abuts against one side of the housing 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 apply a squeezing force in the first direction to the expanded battery cell 11, so as to at least inhibit the deformation of the housing 1112 of the battery cell 11 at the end where the cell cover 1111 is located in the first direction. It can be seen that one of the two first pressing edges 221 presses on one side of the housing 1112 of the first battery cell away from the second battery cell, and the above-mentioned one first pressing edge 221 covers the connection position of the housing 1112 and the cell cover 1111 of the first battery cell (for example, the end where the cell cover 1111 of the first battery cell is located). The other first pressing edge 221 presses on one side of the housing 1112 of the second battery cell away from the first battery cell, and the above-mentioned other first pressing edge 221 covers the connection position of the housing 1112 and the cell cover 1111 of the second battery cell (for example, the end where the cell cover 1111 of the second battery cell is located). At the same time, the connection position of the housing 1112 and the cell cover 1111 of each battery cell 11 is restricted in the first direction, so that the restraining portion 22 can clamp one end of the battery cell 11 with the cell cover 1111 in the first direction, to a certain extent, reducing the probability that cracks or fractures occur at the connection position between the housing 1112 and the cell cover 1111 due to thermal failure or expansion of the battery cell 11, and reducing the probability of thermal runaway of the battery 100. For example, the restraining portion 22 can inhibit the cracking at the connection position between the cell cover 1111 and the housing 1112, so as to reduce the heat diffusion rate when the battery 100 undergoes thermal failure, and eliminate the high-voltage hidden danger to a certain extent.

[0096] 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 crimping edges 221 spaced apart along the first direction. The two first crimping edges 221 respectively abut against the two sides of the casings 1112 of all the battery cells 11 of 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 crimping edges 221 at least exert a squeezing force on the expanded battery cells 11 in the first direction, so as to at least inhibit the deformation of the casings 1112 of the battery cells 11 at the end where the cell covers 1111 are located in the first direction. It can be seen that the two first crimping edges 221 respectively press and cover the connection positions of the casings 1112 and the cell covers 1111 of a plurality of battery cells 11 on both sides in the first direction. Therefore, the connection positions of the casings 1112 and the cell covers 1111 of each battery cell 11 are restricted in the first direction, so that the restraining portion 22 can hold the end of the battery cell 11 with the cell cover 1111 in the first direction, thereby reducing to a certain extent the probability that cracks or fractures occur at the connection positions between the casings 1112 and the housings 111 due to thermal failure or expansion of the battery 100, etc.

[0097] For example, in combination Figure 4 and Figures 7 - 8 , the battery row 1 includes a plurality of battery cells 11 arranged in sequence along the first direction and the second direction. Among them, a plurality of battery cells 11 arranged in sequence along the second direction form a battery unit, and a 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 the first battery unit and the second battery unit respectively. The restraining portion 22 includes two first crimping edges 221 spaced apart along the first direction, and one of the first crimping 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 crimping edges 221 at least exert a squeezing force on the expanded battery cells 11 in the first direction, so as to at least inhibit the deformation of the casings 1112 of the battery cells 11 at the end where the cell covers 1111 are located in the first direction. It can be seen that the two first crimping edges 221 press and cover the two ends of the battery row 1 in the first direction, and each first crimping edge 221 presses and covers the connection positions of the casings 1112 and the cell covers 1111 of the corresponding plurality of battery cells 11. At the same time, the connection positions of the casings 1112 and the cell covers 1111 of each battery cell 11 are restricted in the first direction, so that the restraining portion 22 can hold the end of the battery cell 11 with the cell cover 1111 in the first direction, thereby reducing to a certain extent the probability that cracks or fractures occur at the connection positions between the casings 1112 and the housings 111 due to thermal failure or expansion of the battery 100, etc.

[0098] Of course, in other examples, the binding portion 22 includes three or more first beadings 221 spaced apart in the first direction: 1. The battery row 1 includes a plurality of battery monomers 11 arranged in sequence in the first direction. Two of the plurality of first beadings 221 respectively abut against both ends of the battery row 1 in the first direction, and the remaining first beadings 221 can respectively abut between adjacent two battery monomers 11; 2. The battery row 2 includes a plurality of battery monomers arranged in sequence in the first direction and the second direction. The plurality of battery monomers 11 arranged in sequence in the second direction form a battery unit. The battery row 1 includes a plurality of battery units arranged in sequence in the first direction. Two of the plurality of first beadings 221 respectively abut against both ends of the battery row 1 in the first direction, and the remaining first beadings 221 can respectively abut between adjacent two battery units.

[0099] It can be understood that in the embodiments of the present application, when any battery monomer 1 of the battery row 1 does not undergo expansion and deformation, an extrusion force can be generated between the first beading 221 and the corresponding battery monomer 11, or the first beading 221 and the corresponding battery monomer 11 are just adjacent to each other without generating an extrusion force.

[0100] Optionally, a binding portion 22 is provided on one side of the two sides of the partition portion 21 in the third direction, or binding portions 22 are respectively provided on the two sides of the partition portion 21 in the third direction. For example, taking the battery row 1 as multiple rows and the multiple rows of battery rows 1 arranged in sequence in the third direction as an example, the housing covers 1111 of two adjacent rows of battery rows 1 are arranged back to back. The partition portion 21 is located between the housing cover 1111 of one row of battery row 1 and the housing body 1112 of the other row of battery row 1. A binding portion 22 is provided on one side of the partition portion 21 in the third direction, and the binding portion 22 protrudes toward the side where the housing cover 1111 of the above one row of battery row 11 is located; or, the housing cover 1111 of one row of battery row 1 among two adjacent rows of battery rows 1 faces the housing cover 1111 of the other row of battery row 1. The partition portion 21 is located between the housing covers 1111 of the battery monomers 11 of two adjacent rows of battery rows 1. Binding portions 22 are provided on both sides of the partition portion 21 in the third direction. In other examples, the battery row 1 is one row, and a binding portion 22 is provided on the side of the partition portion 21 facing the battery row 1 in the third direction.

[0101] In the above technical solution, since the partition portion 21 is disposed on one side of the battery row 1 corresponding to the case cover 1111 in the third direction, the partition portion 21 can achieve insulation between two adjacent battery rows 1, or achieve insulation between the battery row 1 and the battery box body 101, etc., which can reduce the probability of risks such as short circuit of the battery 100. By providing that the binding portion 22 includes a plurality of first pressing edges 221 spaced apart in the first direction, and each first pressing edge 221 abuts against at least one end of the case body 1112 of the battery row 1 in the first direction, the first pressing edge 221 can cover the connection position between the case body 1112 of at least one battery cell 11 of the battery row 1 and the case cover 1111. Two adjacent first pressing edges 221 can directly or indirectly apply a force to the battery cells 11 that expand and deform between them in the first direction, so as to at least inhibit the deformation of the case bodies 1112 of all the battery cells 11 between two adjacent first pressing edges 221 at the end where the case cover 1111 is located in the first direction to a certain extent, so that the first pressing edge 221 can play a certain binding and supporting role on the connection position between the case body 1112 and the case cover 1111, so that the binding portion 22 can provide a certain limiting effect to improve the connection stability and reliability of the case body 111 at the connection position between the case body 1112 and the case cover 1111, and can avoid cracking or disconnection at the connection position between the case body 1112 and the case cover 1111 to a certain extent in the case of thermal failure or expansion of the battery cell 11, etc., thereby reducing or avoiding the occurrence of problems such as high-voltage sparking of the battery 100 or reducing the speed of thermal diffusion of the battery cell 11.

[0102] Please refer to Figures 3 - 4 , in some embodiments, the wall with the largest surface area in the case body 1112 is the first wall 1112a. There are two first walls 1112a spaced apart in the first direction, and each first wall 1112a is connected to the case cover 1111 respectively.

[0103] It can be understood that the first wall 1112a is the wall with the largest surface area in the case body 1112 of the battery cell 11, that is, the first wall 1112a is the "large surface" of the battery cell 11. When the battery cell 11 expands and deforms, generally, the expansion amount of the battery cell 11 in the first direction is greater than the expansion amounts of the battery cell 11 in the second and third directions. Exemplarily, in combination with Figure 3 , a plurality of battery cells 11 of the battery row 1 are arranged flat, and the two first walls 1112a are spaced apart in the up and down direction.

[0104] For example, in combination with Figure 3, on both side walls of the cell body 1112 of the battery cell 11 in the first direction are first walls 1112a. The cell cover 1111 is respectively connected to the two first walls 1112a. The partition portion 21 is located on the side of the cell cover 1111 away from the cell body 1112, and the partition portion 21 is provided with a first pressing edge 221 protruding towards the cell cover 1111. The first pressing edge 221 abuts against one end of the cell body 1112 in the first direction, and the first pressing edge 221 covers the connection position between the cell body 1112 and the cell cover 1111.

[0105] In the above technical solution, by setting the first wall 1112a as the wall with the largest surface area in the cell body 1112, and each first wall 1112a is respectively connected to the cell cover 1111, the first pressing edge 221 can abut against 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 cell cover 1111. Thus, the binding portion 22 can bind the battery cell 11 in the direction where the expansion and deformation of the battery cell 11 are relatively large, which is beneficial to further improving the binding effect and supporting effect of the binding portion 22 on the connection position between the cell body 1112 and the cell cover 1111, and can effectively improve the connection stability and reliability of the housing 111 at the connection position between the cell body 1112 and the cell cover 1111.

[0106] Please refer to Figure 4 , in some embodiments, the battery rows 1 are multiple rows and the multiple battery rows 1 are arranged in sequence along the third direction. A strengthening member 2 for insulating and separating the two adjacent battery rows 1 is provided between the two adjacent battery rows 1, and the strengthening member 2 provided between the two adjacent battery rows 1 includes two binding portions 22 respectively provided on both sides of the partition portion 21 in the third direction.

[0107] For example, in combination with Figure 4 and Figures 7 - 8 , the multiple battery rows 1 are arranged in sequence along the third direction. A strengthening member 2 is provided between the two adjacent battery rows 1. The partition portion 21 is used for insulating and separating the two adjacent battery rows 1. The two binding portions 22 are respectively provided on both sides of the partition portion 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 respectively extend to both sides of the battery row 1 along the second direction, and each first pressing edge 221 abuts against a plurality of cell bodies 1112 on one side of the battery row 1 in the first direction, and each first pressing edge 221 abuts against the connection position between the cell bodies 1112 and the cell covers 1111 of a plurality of battery cells 11 on one side of the battery row 1 in the first direction.

[0108] In the above technical solution, by providing a strengthening member 2 between two adjacent rows of battery rows 1, and the strengthening member 2 includes two binding portions 22 respectively disposed 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 cell bodies 1112 and the cell covers 1111 of the battery cells 11 in two adjacent rows of battery rows 1. Thus, one strengthening member 2 can achieve the insulation interval between two adjacent rows of battery rows 1 and the binding of the cell bodies 1112 of the battery cells 11 in two adjacent rows of battery rows 1, which can reduce the number of strengthening members 2 provided, and at the same time can simplify the structural arrangement within the battery 100, which is beneficial to improving the space occupancy utilization rate of the battery cells 11.

[0109] Please refer to Figure 7 and Figure 8 , in some embodiments, the binding portion 22 is integrally formed on the partition portion 21.

[0110] In the above technical solution, by providing that the binding portion 22 is integrally formed on the partition portion 21, the overall structural strength of the strengthening member 2 can be improved, which is beneficial to improving the stability of the binding portion 22 in binding the battery row 1, and is convenient for saving the assembly process between the binding portion 22 and the partition portion 21.

[0111] Exemplarily, the strengthening member 2 is an integrally formed part.

[0112] Optionally, the binding portion 22 and the partition portion 21 are separate parts. For example, the binding portion 22 is detachably disposed on the partition portion 21.

[0113] In some embodiments, a liquid storage portion 21a is formed on one side of the partition portion 21 facing the battery row 1.

[0114] In the above technical solution, by providing that a liquid storage portion 21a is formed on one side of the partition portion 21 facing the battery row 1, the liquid storage portion 21a can store the electrolyte leaked from the battery cell 11 towards the side where the partition portion 21 is located, etc., which can improve the outflow condition of the electrolyte leaked from the battery row 1, and reduce the harm (such as corrosion) to other components (such as other battery rows 1 or the battery box 101, etc.) caused by the leaked electrolyte, etc., thereby reducing the degree of damage to the battery 100 caused by the leakage of the electrolyte, etc.

[0115] In some embodiments, the liquid storage portion 21a is a groove formed on the partition portion 21; or, the liquid storage portion 21a is an adsorbent (such as a porous adsorbent, etc.) provided on the partition portion 21 and capable of adsorbing the electrolyte.

[0116] For example, in combination with Figure 13 , a plurality of liquid storage portions 21a are formed on one side of the partition portion 21 facing the battery row 1, the liquid storage portions 21a are grooves, and the plurality of grooves are arranged in sequence along the first direction and the second direction, so that the grooves can store part of the electrolyte leaked from the battery cell 11, etc.

[0117] In the above technical solution, by setting the liquid storage part 21a as a groove formed on the partition part 21, the groove can store the electrolyte leaked from the battery cell 11, etc. Or, by setting the liquid storage part 21a as an adsorbent provided on the partition part 21 and capable of adsorbing the electrolyte, the adsorbent can adsorb the leaked electrolyte, etc., so as to improve the situation that the electrolyte leaked from the battery row 1 flows outwards. The structure is simple and easy to implement.

[0118] Please refer to Figures 12 - 13 , in some embodiments, a mating groove 21b is formed on one side of the partition part 21 facing the battery row 1, and at least part of the connecting piece 12 is received in the mating groove 21b.

[0119] For example, in combination with Figure 12 and Figure 13 , the partition part 21 is provided between two adjacent battery rows 1, the battery cell covers 1111 of the battery cells 11 in the two battery rows 1 face the partition part 21, the connecting piece 12 is provided on the side of the battery cell cover 1111 facing away from the battery cell body 1112, a plurality of connecting pieces 12 electrically connect the plurality of battery cells 11 in the battery row 1, a plurality of mating grooves 21b are formed on one side of the partition part 21 facing the two adjacent battery rows 1, and the connecting piece 12 can be received in the corresponding mating groove 21b, so as to insulate and separate the plurality of connecting pieces 12 through the partition part 21. Thus, the mating groove 21b can improve the insulation between the plurality of connecting pieces 12, can solve the problem that the connecting pieces 12 cannot be completely insulated to a certain extent, can reduce the probability of risks such as short circuit of the battery 100, and at the same time, the mating groove 21b is used to receive the connecting piece 12, which is beneficial to improving the compactness of the component arrangement in the battery 100. At the same time, the mating groove 21b can play a certain role in restricting the connecting piece 12, and can improve the electrical connection stability of the plurality of battery cells 11 in 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 binding role, so that the mating groove 21b can bind the connecting piece 12 to maintain the stability of its own shape, and can 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 inhibit problems such as fatigue deformation failure of the connecting piece 12 during the operation of the battery cell 11, and can improve the structural stability of the connecting piece 12.

[0120] In the above technical solution, by setting at least part of the connecting piece 12 to be received in the mating groove 21b, the mating groove 21b can separate the corresponding connecting piece 12 from the adjacent connecting piece 12, can insulate and separate the adjacent connecting pieces 12 to a certain extent, can reduce the probability of risks such as short circuit of the battery 100, and at the same time, the mating groove 21b can play a certain binding role, so that the mating groove 21b can bind the connecting piece 12 to maintain the stability of its own shape, and can reduce the possibility of deformation of the connecting piece 12.

[0121] Optionally, the shape of the mating groove 21b is not limited. For example, the mating groove 21b can be circular, waist-shaped, oval, or polygonal, etc., or be formed by combining a part of a polygon and a part of a circle.

[0122] Optionally, the connecting piece 12 can be received in the mating groove 21b, and the connecting piece 12 is integrally formed on the partition portion 21, so that the connecting piece 12 can be integrated onto the partition portion 21, which is beneficial to simplifying the assembly efficiency of the battery 100.

[0123] In some embodiments, a receiving groove is formed on the groove wall of the mating groove 21b; and / or, an adsorbing member capable of adsorbing the electrolyte is provided on the groove wall of the mating groove 21b.

[0124] In the above technical solution, by forming a receiving groove or providing an adsorbing member on the groove wall of the mating groove 21b, while the mating groove 21b improves the stability of the setting of the connecting piece 12, the receiving groove or the adsorbing member can store the leaked electrolyte, etc., to improve the outflow situation of the electrolyte leaked from the battery row 1, and reduce the harm such as corrosion to other components such as other battery rows 1 or the battery box 101, etc. caused by the leaked electrolyte, etc., so as to reduce the degree of damage to the battery 100 caused by the leakage of the electrolyte, etc.

[0125] Optionally, when a mating groove 21b and a liquid storage portion 21a are formed on the side of the partition portion 21 facing the battery row 1, the mating groove 21b and the liquid storage portion 21a are arranged at intervals, or the mating groove 21b is configured as the liquid storage portion 21a.

[0126] In some embodiments, the strengthening member 2 is an insulating member; or, the strengthening member 2 includes a strength member and an insulating layer at least coated on the surface of the strength member corresponding to the connecting piece 12, and the insulating layer is used for insulating and isolating the strength member and the connecting piece 12 to achieve insulation between the strengthening member 2 and the connecting piece 12 and insulation between multiple battery cells 11 of the battery row 1.

[0127] In the above technical solution, by setting the strengthening member 2 as an insulating member, or at least coating an insulating layer on the surface of the strength member corresponding to the connecting piece 12, insulation between the strengthening member 2 and the connecting piece 12 can be achieved, so as to achieve insulation between the strengthening member 2 and the battery row 1, and the probability of risks such as short circuit of the battery 100 can be reduced.

[0128] Optionally, when the strengthening member 2 includes a strength member and an insulating layer, the insulating layer can wrap the entire strength member.

[0129] 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. Optionally, the melting point of the insulating member can be 250 °C, 270 °C, 300 °C, 350 °C, or 400 °C, etc.; the resistivity of the insulating member can be 100 MΩ / mm, 150 MΩ / mm, 200 MΩ / mm, 250 MΩ / mm, or 300 MΩ / mm, etc.

[0130] In the above technical solution, by setting the insulating member to have a suitable melting point, the reinforcing member 2 has good high-temperature resistance, so that the reinforcing member 2 has certain insulation and heat insulation capabilities, which can reduce the probability of the reinforcing member 2 melting, thereby reducing the risk of short circuit of the battery 100, etc.; by setting the insulating member to have a suitable resistivity, good insulation performance can still be maintained between two adjacent rows of battery rows 1 at a higher voltage, improving the applicability of the reinforcing member 2.

[0131] 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. Among them, the insulating layer is a high-temperature resistant and heat-insulating material member; and / or, the resistivity of the insulating layer is greater than or equal to 100 MΩ / mm.

[0132] For example, the high-temperature resistant and heat-insulating material can be provided on the surface of the strength member by means of compounding or spraying to form an insulating layer.

[0133] In the above technical solution, the strength member having a suitable melting point 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 member 2. The insulating layer is a high-temperature resistant and heat-insulating material member, which can further improve the heat resistance and heat insulation capabilities of the reinforcing member 2; the insulating layer having a suitable resistivity can improve the insulation effect of the reinforcing member 2. Of course, setting the strength member to have a suitable melting point and / or setting the insulating layer as a high-temperature resistant and heat-insulating material can enhance the heat resistance of the reinforcing member 2, facilitating the reinforcing member 2 to still maintain the stability of its own structure at a higher temperature, so as to improve the situation of high-temperature melting of the reinforcing member 2. Especially when the battery row 1 has a thermal runaway, the reinforcing member 2 is not easily melted, facilitating still restricting and binding the battery row 1, and at the same time realizing the insulation separation of the battery row 1.

[0134] In some embodiments, the reinforcing member 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.

[0135] It can be understood that when the reinforcing member 2 includes at least two 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, the reinforcing member 2 may include a structure formed by connecting the above at least two members by physical connection means (such as welding, bonding, coating, bolt connection, etc.); for example, the reinforcing member 2 includes a polytetrafluoroethylene member and a polyethylene member, and the two are fixedly connected by physical connection means.

[0136] Optionally, when the reinforcing member 2 is an insulating member, the reinforcing member 2 may include at least one of a polytetrafluoroethylene member, a polyethylene member, a polystyrene member, a mica member, and a ceramic member; when the reinforcing member 2 includes a strength member and an insulating layer at least coated on the surface of the strength member corresponding to the connection piece 12, the strength member may include at least one of a metal member, an alloy member, and a carbon fiber member, and the insulating layer may include at least one of a polytetrafluoroethylene member, a polyethylene member, a polystyrene member, and a mica member, but is not limited thereto.

[0137] In the above technical solution, the reinforcing member 2 may include one or more of the above material members, so that the partition portion 21 can adopt a suitable material to adapt to the working environment of the battery 100, which is beneficial to improving the performance of the partition portion 21.

[0138] Please refer to Figures 15 - 16 , in some embodiments, if the insulating thickness of the reinforcing member 2 at the position of the connection piece 12 is t1, then the insulating thickness corresponding to the area where the connection piece 12 is projected onto the reinforcing member 2 in the third direction is t1, and 1 mm ≤ t1 ≤ 10 mm. Optionally, the insulating thickness t1 of the reinforcing member 2 at the position of the connection piece 12 may be 1 mm, 3 mm, 5 mm, 7 mm, 9 mm, or 10 mm, etc.

[0139] In the above technical solution, by setting the reinforcing member 2 to have a suitable insulating thickness at the position of the connection piece 12, the reinforcing member 2 has sufficient insulating performance at the position of the connection piece 12, so that the reinforcing member 2 can insulate and separate adjacent two rows of battery rows 1.

[0140] Optionally, a mating groove 21b is formed on one side of the partition portion 21 facing the battery row 1, then a mating groove 21b is formed on one side of the partition portion 21 in the third direction, or mating grooves 21b are formed on both sides. When a mating groove 21b is formed on one side of the partition portion 21 in the third direction, the insulating thickness between the bottom wall of the mating groove 21b and the surface of the partition portion 21 away from the mating groove 21b in the third direction is t1; when mating grooves 21b are formed on both sides of the partition portion 21 in the third direction, if the mating grooves 21b on both sides of the partition portion 21 are opposite, the insulating thickness between the bottom walls of the mating grooves 21 on both sides of the partition portion 21 in the third direction is t1.

[0141] Please refer to Figures 15 - 16 , in some embodiments, the width by which the binding portion 22 protrudes from the partition portion 21 in the third direction is d, where 5 mm ≤ d ≤ 20 mm; and / or, the thickness of the binding portion 22 is t2, where 1 mm ≤ t2 ≤ 5 mm.

[0142] For example, in combination with Figure 15 and Figure 16 , the width of the first crimping edge 221 in the front-rear direction is d, and the thickness of the first crimping edge 221 is t2. Optionally, the width d of the binding 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 binding portion 22 can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, etc.

[0143] Of course, the binding portion 22 has a suitable width in the third direction, and the binding portion 22 has a suitable thickness, so that the binding portion 22 can provide a suitable high-strength binding force to bind the shell body 1112 (for example, the binding portion 22 can provide a high-strength binding force of 1 Mpa / mm 2 ~20 Mpa / mm 2 ) to effectively bind the connection position between the shell body 1112 and the shell cover 1111. Optionally, in some examples, the binding portion 22 is a metal part with high strength, and an insulating material is compounded or coated on the surface of the binding portion 22, etc., and the binding portion 22 can provide a relatively large high-strength binding force.

[0144] In the above technical solution, by setting the binding portion 22 to have a suitable width in the third direction, so that the first crimping 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, enabling the binding portion 22 to effectively bind and support the connection position between the shell body 1112 and the shell cover 1111, thereby enhancing the structural stability of the connection position between the shell body 1112 and the shell cover 1111; and by setting the binding portion 22 to have a suitable thickness, so that the binding portion 22 has a suitable structural strength, enabling the first crimping edge 221 of the binding portion 22 to 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 inhibit the cracking of the connection position between the shell body 1112 and the shell cover 1111 to a certain extent.

[0145] Please refer to Figure 8 and Figure 13 , in some embodiments, the binding portion 22 further includes two second crimping edges 222 spaced apart in the second direction, and each second crimping edge 222 is respectively connected to a plurality of first crimping edges 221, then each second crimping edge 222 is respectively connected to each first crimping edge 221.

[0146] Exemplarily, the binding part 22 includes two first crimping edges 221 and two second crimping edges 222, so that the binding part 22 defines an annular structure; further, one end of each first crimping edge 221 is connected to one end of each second crimping edge 222, so that the binding part 22 is formed into an annular structure. Of course, in other examples, the number of the first crimping edges 221 may also be greater than the number of the second crimping edges 222.

[0147] It can be understood that in the embodiments of the present application, the second crimping edge 222 may only be used to connect the first crimping edges 221 arranged at intervals in the first direction. At this time, the second crimping edge 22 may be arranged at intervals from the battery row 1, or the second crimping edge 222 may not only be used to connect the first crimping edges 221 arranged at intervals in the first direction, but also the second crimping edge 222 abuts against one end of at least one housing body 1112 of the battery row 1 in the second direction.

[0148] In the above technical solution, by arranging the second crimping edge 222 to connect the plurality of first crimping edges 221, each second crimping edge 222 can play a certain limiting role in the deformation of the first crimping edge 221 in the first direction, which can improve the structural strength and structural stability of the binding part 22, and is beneficial to improving the binding effect of the first crimping edge 221 on the housing body 1112, so that the binding effect and the supporting effect of the binding part 22 on the connection position between the housing body 1112 and the housing cover 1111 can be improved, which is beneficial to further improving the connection reliability between the housing body 1112 and the housing cover 1111.

[0149] Please refer to Figure 4 and Figures 11 - 12 , in some embodiments, each second crimping edge 222 abuts against one end of at least one housing body 1112 of the battery row 1 in the second direction.

[0150] For example, in combination with Figure 12 , the binding part 22 includes two first crimping edges 221 arranged at intervals in the first direction and two second crimping edges 222 arranged at intervals in the second direction. Each second crimping edge 222 is respectively connected to the two first crimping edges 221, so that the binding part 22 is formed into an annular structure, so that the binding part 22 can bind one end of the battery row 1 facing the partition part 21, and the first crimping edge 221 and the second crimping edge 222 respectively cover the connection position between the housing body 1112 and the housing cover 1111 of the corresponding battery cell 11 of the battery row 1. Thus, the binding part 22 can effectively bind and support the battery row 1, and can improve the connection strength and stability between the housing body 1112 and the housing cover 1111 of the battery cell 11.

[0151] Optionally, the binding part 22 includes two first crimping edges 221 spaced apart in the first direction and second crimping edges 222 spaced apart in the second direction. Each second crimping edge 222 is respectively connected to the two first crimping edges 221, so that the binding part 22 is formed into an annular structure. The binding part 22 can hoop the end of the battery row 1 (for example, one end of the shell cover 1111 of the battery cell 11 in the battery row 1), so that the strengthening member 2 has the function of preventing liquid leakage to improve the situation that the electrolyte leaked from the battery cell 11 flows to other positions and is likely to cause corrosion and the like.

[0152] In the above technical solution, by setting the second crimping edge 222 to abut against one end of at least one shell body 1112 of the battery row 1 in the second direction, the second crimping edge 222 can press and cover at least one shell body 1112 of the battery cell 11 in the battery row 1, and cover the connection position between the shell body 1112 and the shell cover 1111. The two second crimping edges 222 can directly or indirectly apply forces to the battery cells 11 that expand and deform in the second direction between them, so as to at least inhibit the deformation of the shell bodies 1112 of all the battery cells 11 between the two second crimping edges 222 in the first direction and the second direction at the end where the shell cover 1111 is located to a certain extent, so that the second crimping edge 222 can play a certain binding and supporting role on the connection position between the shell body 1112 and the shell cover 1111, so that the binding part 22 can provide a strong 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. When the battery cell 11 has a thermal failure or expansion and other situations, the risk of cracking or disconnection at the connection position between the shell body 1112 and the shell cover 1111 of the shell 111 is reduced to a certain extent, so that problems such as high-voltage sparking in the battery 100 can be reduced, the thermal diffusion speed of the battery cell 11 can be reduced, and the use reliability of the battery 100 can be improved.

[0153] Optionally, the width of the binding part 22 in the third direction is d, and 5 mm ≤ d ≤ 20 mm; and / or, the thickness of the binding part 22 is t2, and 1 mm ≤ t2 ≤ 5 mm. For example, in combination with Figure 15 and Figure 16 , the width of the second crimping edge 222 in the front-back direction is d, and the thickness of the second crimping edge 222 is t2.

[0154] Please refer to Figures 9 - 11 , in some embodiments, the shell cover 1111 is provided with a pole post 112, and a pressure relief structure 114 is provided on a side wall of the shell body 1112 facing away from the shell cover 1111. The battery 100 further includes: a thermal management component 3, and the thermal management component 3 includes a heat exchange part 31 and a discharge part 32. The heat exchange part 31 is used for heat exchange with the battery row 1, and the discharge part 32 is used for receiving the discharge substances discharged by the battery row 1 through the pressure relief structure 114. At least part of the discharge part 32 is thermally connected to the heat exchange part 31.

[0155] Optionally, the pressure relief structure 114 and the housing cover 1111 are located on opposite sides of the housing body 1112, facilitating the arrangement of the pressure relief structure 114 on the housing body 1112. Meanwhile, the pressure relief structure 114 is located on the side of the housing body 1112 away from the housing cover 1111, so as to facilitate the corresponding communication between the pressure relief structure 114 and the discharge portion 32.

[0156] It can be seen that the pole 112 and the pressure relief structure 114 of the battery cell 11 itself are respectively located on different surfaces of the battery cell 11, facilitating a relatively large distance between the pole 112 and the pressure relief structure 114 of the battery cell 11, so as to effectively reduce the occurrence of problems such as insulation failure and high-voltage sparking caused by emissions (such as in the case of thermal runaway of the battery cell 11) including particles flowing from the pressure relief structure 114 of the battery cell 11 to its own pole 112.

[0157] For example, in combination with Figures 9 - 11 and Figure 12 , the housing cover 1111 and the pressure relief structure 114 are located on both sides of the housing body 1112 in the third direction. The housing cover 1111 is provided with a pole 112, and the connecting piece 12 is electrically connected to the pole 112 to electrically connect multiple battery cells 11 of the battery row 1. The strengthening member 2 and the thermal management member 3 are arranged on both sides of the battery row 1 in the third direction. The thermal management member 3 includes a discharge portion 32 and a heat exchange portion 31. The discharge portion 32 is communicated with the pressure relief structure 114 of the corresponding battery row 1. The discharge portion 32 is used to timely discharge the high-temperature gas inside the battery cell 11 when thermal failure occurs, which can reduce the diffusion speed of thermal runaway. The heat exchange portion 31 is used to exchange heat with the battery row 1, so as to keep the battery 100 within a suitable temperature range, which is beneficial to improving the performance of the battery 100.

[0158] Wherein, at least a part of the discharge portion 32 is thermally connected to the heat exchange portion 31, that is, a part of the discharge portion 32 exchanges heat with the heat exchange portion 31, or the entire discharge portion 32 exchanges heat with the heat exchange portion 31. For example, the emissions are the emissions discharged during thermal runaway of the battery cell 11. The emissions are discharged through the discharge position of the battery cell 11 (for example, a pressure relief structure 114 is provided at the discharge position), and the temperature of the emissions is relatively high. The heat exchange portion 31 exchanges heat with the discharge portion 32, so that the heat exchange portion 31 can not only timely dissipate the heat of the emissions to avoid the heat concentrating near the discharge position (such as the pressure relief structure 114) of the battery cell 11 for a long time, but also cool down the emissions to reduce the probability of the spread of thermal runaway of the battery cell 11.

[0159] It can be understood that at least part of the discharge part 32 is thermally connected to the heat exchange part 31, which means that the discharge part 32 is directly or indirectly connected to the heat exchange part 31, so that at least part of the discharge part 32 remains relatively stationary with the heat exchange part 31, and at the same time, there is heat exchange between at least part of the discharge part 32 and the heat exchange part 31. Then, at least part of the discharge part 32 is in direct contact with the heat exchange part 31 to achieve heat exchange, or at least part of the discharge part 32 and the heat exchange part 31 are indirectly cooperated through a heat conducting member to achieve heat exchange.

[0160] In the above technical solution, by setting at least part of the discharge part 32 to be thermally connected to the heat exchange part 31, the heat generated when the battery cell 11 has a thermal failure can be evacuated in time. At the same time, the heat exchange part 31 can also cool the battery cell 11 to reduce the probability of the spread of thermal runaway of the battery cell 11.

[0161] Please refer to Figure 4 , in some embodiments, the battery row 1 is multiple rows and the multiple battery rows 1 are arranged in sequence along the third direction. The strengthening components 2 and the thermal management components 3 are respectively multiple, and the multiple strengthening components 2 and the thermal management components 3 are alternately arranged one by one along the third direction.

[0162] For example, in combination with Figure 4 and Figure 12, multiple rows of battery rows 1 are arranged in sequence along the third direction. Each row of battery row 1 includes a plurality of battery cells 11 arranged in sequence along the first direction and the second direction. The cell cover 1111 and the pressure relief structure 114 are respectively located on both sides of the cell body 1112 in the third direction. The cell cover 1111 is provided with a terminal post 112. The connecting piece 12 is used to connect with the terminal post 112 to electrically connect the plurality of battery cells 11 of the battery row 1. The strengthening member 2 is arranged between two adjacent rows of battery rows 1. The thermal management member 3 is arranged between two adjacent rows of battery rows 1, and a plurality of strengthening members 2 and a plurality of thermal management members 3 are arranged alternately in sequence along the third direction. There is one thermal management member 3 between two adjacent strengthening members 2, and there is one strengthening member 2 between two adjacent thermal management members 3. There is one row of battery row 1 between two adjacent strengthening members 2 and thermal management members 3. The strengthening member 2 is arranged between the sides of two adjacent rows of battery rows 1 corresponding to the cell cover 1111, that is, one end of the battery cells 11 of two adjacent rows of battery rows 1 corresponding to the cell cover 1111 faces the same strengthening member 2. The partition portion 21 of the strengthening member 2 insulates and separates two adjacent rows of battery rows 1, and the binding portions 22 located on both sides of the partition portion 21 in the third direction respectively bind the corresponding battery rows 1 (for example, the connection position between the cell body 1112 and the cell cover 1111 of the battery row 1). The thermal management member 3 is arranged between the sides of two adjacent rows of battery rows 1 corresponding to the pressure relief structure 114, that is, one end of the battery cells 11 of two adjacent rows of battery rows 1 corresponding to the pressure relief structure 114 faces the same thermal management member 3. The thermal management member 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 communicated with the pressure relief structure 114 of the corresponding battery row 1. The discharge portion 32 is used to timely discharge the high-temperature gas in the battery cell 11 when thermal failure occurs. The heat exchange portion 31 is used to exchange heat with 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 thereto. A strengthening member 2 or a thermal management member 3 can also be correspondingly arranged between the battery row 1 and the battery box body 101; two strengthening members 2 can be arranged between two adjacent battery rows 1, and / or two thermal management members 3 can be arranged between two adjacent battery rows 1.

[0163] In the above technical solution, by arranging a plurality of strengthening members 2 and thermal management members 3 alternately one by one along the third direction, the structural design of the battery 100 is made more compact and reasonable. On the premise that the battery 100 can have appropriate heat dissipation performance under the action of the heat exchange portion 31, the discharge portion 32 can timely discharge the high-temperature gas in the battery cell 11 when thermal failure occurs, and the binding portion 22 can bind the cell body 1112 of the battery row 1, so that the continuous occurrence of thermal failure can be inhibited, and the probability of thermal runaway of the battery 100 can be reduced.

[0164] Please refer to Figures 11 - 12, in some embodiments, the battery cell 11 further includes a terminal 112 and an electrode assembly 113. The terminal 112 is disposed on the cell cover 1111. The electrode assembly 113 includes an active material coating portion 1131 and an electrode tab portion 1132. The electrode tab portion 1132 is electrically connected to the terminal 112 and the active material coating portion 1131 respectively. The distance between the end of the restraint portion 22 away from the partition portion 21 and the inner wall of the cell cover 1111 is x1, and the distance between the end of the active material coating portion 1131 facing the cell cover 1111 and the inner wall of the cell cover 1111 is x2, where x1 ≤ x2; alternatively, the active material coating portion 1131 includes an edge portion 1131a and a central portion 1131b arranged in sequence along a third direction. The thickness of the edge portion 1131a is less than that of the central portion 1131b. The distance between the end of the edge portion 1131a facing away from the cell cover 1111 and the inner wall of the cell cover 1111 is x3, where x1 ≤ x3.

[0165] Wherein, the distance between the end of the restraint portion 22 away from the partition portion 21 and the inner wall of the cell cover 1111 is less than or equal to the distance between the end of the active material coating portion 1131 facing the cell cover 1111 and the inner wall of the cell cover 1111. In this way, for the part of the active material coating portion 1131 corresponding to the housing 111 that is not covered by the restraint portion 22, the restraint portion 22 restrains the non-primary expansion region of the battery cell 11 (such as the residual space position without JR), which can reduce the influence of the restraint portion 22 on the expansion of the battery cell 11 to a certain extent, is beneficial to improving the situation of lithium plating and the like in the active material coating portion 1131 to a certain extent, thereby being beneficial to improving the performance of the battery cell 11. At the same time, the restraint portion 22 can cover a suitable part of the housing 111 in the third direction, which is beneficial to improving the restraint effect of the restraint portion 22 on the battery row 1

[0166] Wherein, the distance between the end of the restraint portion 22 away from the partition portion 21 and the inner wall of the cell cover 1111 is less than or equal to the distance between the end of the edge portion 1131a facing away from the cell cover 1111 and the inner wall of the cell cover 1111. In this way, for the part of the central portion 1131b corresponding to the housing 111 that is not covered by the restraint portion 22, the restraint portion 22 covers the non-primary expansion region of the battery cell 11, which can reduce the influence of the restraint portion 22 on the expansion region of the battery cell 11 to a certain extent, is beneficial to improving the situation of lithium plating and the like in the active material coating portion 1131 to a certain extent. At the same time, the restraint portion 22 can cover a relatively large part of the housing 111 in the third direction, which is beneficial to improving the restraint effect of the restraint portion 22 on the battery row 1.

[0167] It can be understood that the area of the housing 111 corresponding to the active material coating portion 1131 is the main expansion area of the battery cell 11. The expansion amount of the central portion 1131b corresponding to the expansion area of the battery cell 11 is generally greater than that of the edge portion 1131a corresponding to the expansion area of the battery cell 11. The active material coating portion 1131 is the part of the electrode assembly coated with the active material, which can assist in the insertion and extraction of metal ions during the charging and discharging process of the battery cell 11. The coating thickness of the active material in the central portion 1131b is greater than that in the edge portion 1131a, so that the thickness of the edge portion 1131a is less than that of the central portion 1131b, and the edge portion 1131a can be formed into a JR thinning area.

[0168] Optionally, the battery 100 includes a battery box body 101. The battery box body 101 includes a first box body 101a and a second box body 101b. The part of the first box body 101a or the second box body 101b corresponding to the binding portion 22 can be locally thinned (for example, relief grooves are formed at the positions of the first box body 101a and the second box body 101b corresponding to the binding portion 22), which can reduce the dimensional influence of the binding portion 22 on the battery 100 in the first direction and / or the second direction, and to a certain extent, reduce the occupancy of the layout space of the battery cell 11 by the binding portion 22 and reduce the loss of the energy density of the battery 100. Thus, by providing the strengthening member 2 and locally thinning the part of the battery box body 101 corresponding to the binding portion 22, on the premise that the battery 100 has a suitable energy density, the degree of damage to the battery 100 caused by collisions and the like can be reduced to the greatest extent.

[0169] In the above technical solution, by setting the distance between the end of the binding portion 22 far 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 facing away from the shell cover 1111 and the inner wall of the shell cover 1111, the influence of the binding portion 22 on the expansion area of the battery cell 11 can be reduced to a certain extent, which is beneficial to avoiding the occurrence of lithium plating and other situations in the active material coating portion 1131 to a certain extent. At the same time, the binding portion 22 can cover a suitable length of the housing 111 in the third direction, which is beneficial to improving the binding effect of the binding portion 22 on the battery row 1 (for example, the connection position of the shell cover 1111 and the shell body 1112).

[0170] In a second aspect, an electric device 1000 provided by an embodiment of the present application includes the above-mentioned battery 100, and the battery 100 is used to provide electric energy.

[0171] In the above technical solution, by setting the battery 100 to provide electric energy for the electric device 1000, the reliability of the electric device 1000 can be improved.

[0172] For example, in combination with Figures 2 - 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-back direction as an example, the battery 100 includes multiple rows of battery rows 1 arranged in sequence in the front-back direction. Each row of battery rows 1 includes multiple battery cells 11 arranged in sequence in the up-down direction and the left-right direction. The housing 111 of the battery cell 11 includes a body 1112 and a cover 1111. The cover 1111 is connected to the front end or the rear end of the body 1112; the battery 100 further includes a strengthening member 2 and a thermal management member 3. The strengthening member 2 is disposed between two adjacent rows of battery rows 1 and is opposite to the covers 1111 of the two adjacent rows of battery rows 1. The thermal management member 3 is disposed between two adjacent rows of battery rows 1 and is opposite to the bodies 1112 of the two adjacent rows of battery rows 1. Multiple strengthening members 2 and multiple thermal management members 3 are alternately arranged in sequence in the front-back direction. One thermal management part 3 is provided between two adjacent strengthening members 2, and one strengthening member 2 is provided between two adjacent thermal management members 3. Among them, for each battery cell 11, the length of the battery cell 11 in the front-back direction is greater than the length of the battery cell 11 in the left-right direction, and the length of the battery cell 11 in the left-right direction is greater than the length of the battery cell 11 in the up-down direction. At this time, the battery cell 11 is arranged horizontally.

[0173] One side of the body 1112 of each battery cell 11 facing the strengthening member 2 is open. The cover 1111 is connected to the open end 111a of the body 1112. The cover 1111 is provided with a terminal post 112. One end of the body 1112 of each battery cell 11 opposite to the cover 1111 is closed, and a pressure relief structure 114 is provided on the side of the body 1112 facing the thermal management member 3.

[0174] The strengthening member 2 includes a separating part 21 and a binding part 22. The separating part 21 insulates and separates two adjacent rows of battery rows 1. Binding parts 22 are respectively provided on the front and rear sides of the separating part 21. Each binding part 22 is formed into an annular structure and includes two first pressing edges 221 spaced up and down and two second pressing edges 222 spaced left and right. Each first pressing edge 221 extends in the left-right direction and its two ends are respectively connected to the two second pressing edges 222; each binding part 22 is respectively hoop-mounted on the outer peripheral side of the corresponding battery row 1, so that the two first pressing edges 221 respectively abut against the two ends of the corresponding battery row 1 in the up-down direction, and the two second pressing edges 222 respectively abut against the two ends of the corresponding battery row 1 in the left-right direction, so as to limit the expansion and deformation of the battery row 1, thereby playing a protective role in the connection position between the body 1112 and the cover 1111.

[0175] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0176] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A battery row, the battery row comprising a connecting piece and a plurality of battery cells sequentially arranged along a first direction and / or a second direction, the housing of each of the battery cells comprising a shell body and a shell cover, the shell bodies of the battery row are openly arranged on the same side in a third direction, the shell cover is connected to the open end of the shell body, the connecting piece is arranged on a side of the shell cover away from the shell body and is used to electrically connect the plurality of battery cells of the battery row, and the first direction, the second direction and the third direction intersect each other; A reinforcing component, the reinforcing component includes a partition and a binding portion, the partition is arranged 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 is arranged 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, characterized in that The wall with the largest surface area in the shell body is the first wall. There are two first walls which are spaced apart along the first direction, and each first wall is connected to the shell cover respectively.

3. The battery according to claim 1, characterized in that The battery rows are multiple rows and are arranged in sequence along the third direction. A reinforcing component for insulating and separating the two rows of battery rows is provided between two adjacent 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 portion in the third direction.

4. The battery according to claim 1, characterized in that The restraining portion is integrally formed with the partition portion.

5. The battery according to claim 1, characterized in that A liquid storage portion is formed on one side of the partition facing the battery row.

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

7. The battery according to claim 1, characterized in that A matching groove is formed on one 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, characterized in that A receiving groove is formed on the groove wall of the matching groove; and / or an adsorbing member capable of adsorbing electrolyte is provided on the groove wall of the matching groove.

9. The battery according to claim 1, characterized in that The reinforcing member is an insulating member; or, The reinforcing component includes a strength member and an insulating layer coated at least on 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, characterized in that 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, characterized in that When the reinforcing member comprises 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 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 claim 9, characterized in that The reinforcing component comprises 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 claim 9, characterized in that The insulation thickness of the reinforcing component at the position of the connecting piece is t1, 1mm≤t1≤10mm.

14. The battery according to claim 1, characterized in that The width of the tie 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 claim 1, characterized in that The binding 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, characterized in that 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 claim 1, characterized in that The shell cover is provided with a pole, a side wall of the shell body facing away from the shell cover is provided with a pressure relief structure, and the battery further comprises: A thermal management component, the thermal management component includes a heat exchange portion and a discharge portion, the heat exchange portion is used to exchange heat with the battery row, 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, characterized in that The battery rows are multiple and are arranged in sequence 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, characterized in that The battery cell further includes a pole and an electrode assembly, wherein the pole is disposed 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 one 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, characterized in that: Comprising a battery according to any one of claims 1 to 19, the battery is used to provide electrical energy.

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