CN218414815U - Battery and power consumption device - Google Patents

Abstract

The application provides a battery and a power consumption device. The battery comprises a plurality of battery monomers and a supporting component, wherein each battery monomer comprises a shell and a pressure relief mechanism, the shell comprises a first wall, and the pressure relief mechanism is arranged on the first wall; the plurality of battery cells include a first battery cell and a second battery cell, and the thermal stability of the first battery cell is higher than that of the second battery cell; along the thickness direction of the first wall, the first battery monomer and the second battery monomer are adjacently arranged, and the first wall of the adjacent first battery monomer and the first wall of the adjacent second battery monomer are opposite in direction; the support assembly is arranged between the first walls of the first battery monomer and the second battery monomer which are adjacent to each other, the support assembly comprises a frame and a partition plate connected to the frame, and the size of the partition plate is smaller than that of the frame along the thickness direction. The battery provided by the application is favorable for reducing the weight of the battery.

Description

Battery and power consumption device

Technical Field

The present application relates to the field of battery technology, and in particular, to a battery and a power consumption device.

Background

Batteries are widely used in electronic devices such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like.

In the development of the battery technology, how to simplify the structure of the battery and realize the lightweight of the battery on the premise of ensuring the performance of the battery cell is a problem to be solved urgently in the battery technology.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a battery and an electric device, so as to reduce the weight of the battery.

In a first aspect, an embodiment of the present application provides a battery, including a plurality of battery cells and a support assembly; the single battery comprises a shell and a pressure relief mechanism, wherein the shell comprises a first wall, and the pressure relief mechanism is arranged on the first wall; the plurality of battery cells comprise a first battery cell and a second battery cell, and the thermal stability of the first battery cell is higher than that of the second battery cell; along the thickness direction of the first wall, the first battery cell and the second battery cell are adjacently arranged, and the first wall of the adjacent first battery cell and the first wall of the adjacent second battery cell are opposite in direction; the support assembly is arranged between the first walls of the first battery monomer and the second battery monomer which are adjacent to each other, the support assembly comprises a frame and a partition plate connected to the frame, and the size of the partition plate is smaller than that of the frame along the thickness direction.

The battery that this application embodiment provided, owing to set up first battery monomer and the adjacent setting of second battery monomer along thickness direction, can reduce and take place the risk to spouting along taking place between the adjacent battery monomer of thickness direction, reduced the strength requirement to the supporting component between the battery monomer. Therefore, the supporting component between the pressure relief mechanisms of the battery cells does not need to bear large impact force, and a structure with light weight or thin thickness can be adopted to reduce the weight of the battery.

In some embodiments, the material of the separator comprises mica, and/or the frame comprises steel or iron tubing. The material that sets up the baffle includes mica, is favorable to further reducing the weight of supporting component to further reduce the battery monomer of baffle both sides and produce the risk of thermal runaway because of heat-conduction, be favorable to improving the security performance of battery. Set up the frame and include steel pipe or iron pipe, under the prerequisite of guaranteeing its structural strength, also be favorable to reducing the whole weight of supporting component.

In some embodiments, one separator is disposed opposite to the first walls of the plurality of battery cells on the same side in the thickness direction. The number of the partition plates can be reduced, the number and the weight of the cross beams in the frame are further reduced, and the overall weight of the supporting assembly is favorably reduced.

In some embodiments, the support assembly includes a plurality of partitions extending in a first direction and arranged in a second direction, the first direction, the second direction, and the thickness direction being perpendicular to one another. Therefore, the weight of the frame and the occupied space of the frame are further reduced, the weight of the battery is reduced, meanwhile, the arrangement density of the single battery along the first direction is favorably improved, and the energy density of the battery is further improved.

In some embodiments, the support assembly includes a plurality of frames arranged along the second direction, and two frames adjacent to each other along the second direction have a gap therebetween. So, can utilize the space between the frame more timely distribute out the heat that the inside battery monomer of battery produced, be favorable to improving the security performance of battery.

In some embodiments, the battery cell includes an electrode terminal provided at the first wall; the separator has a groove disposed opposite to the electrode terminal, and at least a portion of the electrode terminal is received in the groove. The groove formed in the partition plate and opposite to the electrode terminal is beneficial to reducing the interval of the battery monomer along the thickness direction, so that the structure inside the battery is more compact, and the energy density of the battery is improved.

In some embodiments, the battery includes a case in which the battery cells and the support assembly are housed; the side part of the frame facing the battery monomer is provided with a convex part which is arranged between two adjacent battery monomers, and/or the convex part is arranged between the battery monomer and the box body. So, be favorable to improving the frame to the free supporting role of battery, reduce between the battery monomer, perhaps produce the risk of rocking between battery monomer and the box, and then improve battery overall structure's stability.

In some embodiments, the battery includes a case and an end plate, the battery cell and the end plate being received in the case, the end plate being disposed between the battery cell and the case; the frame is connected to the end plates on both sides in a first direction perpendicular to the thickness direction. Set up the frame and be connected with the end plate along the both sides of first direction, can fix a position supporting component better, improve end plate and supporting component's joint strength, be favorable to improving battery overall structure's stability.

In some embodiments, there is a gap between the support assembly and the battery cell. Therefore, the battery pack is beneficial to timely discharging heat generated by the single battery, reduces the risk of thermal runaway caused by overhigh local temperature of the battery, and improves the safety performance of the battery.

In some embodiments, the energy density of the second battery cell is higher than the energy density of the first battery cell. Therefore, the thermal stability of the battery is ensured, and the battery is ensured to have higher energy density.

In some embodiments, the first battery cell is a lithium iron phosphate battery cell, and/or the second battery cell is a ternary battery cell. Thus, the thermal stability and the energy density of the battery can be further ensured.

In some embodiments, the plurality of battery cells are arranged in a first direction, the first direction being perpendicular to the thickness direction; along the first direction, the first battery cell and the second battery cell are alternately arranged.

In some embodiments, the single cells are also arranged along a second direction, and the first direction, the second direction and the thickness direction are perpendicular to each other; the maximum size of the single batteries along the first direction is larger than that along the second direction, and the number of the single batteries arranged along the first direction is larger than that of the single batteries arranged along the second direction. So set up, be favorable to the battery to form flat structure, when installing the battery on power consumption device like the vehicle, can set up the direction of height parallel of second direction and vehicle, the battery monomer of battery inside is flat lies in the box, can rationally set up the quantity that battery monomer in the battery arranged along the second direction according to the direction of height's of vehicle space to the direction of height's of rational utilization vehicle space improves vehicle inner structure's compactness.

In a second aspect, an embodiment of the present application provides an electric device, which includes the battery provided in the foregoing embodiment, and the battery is used for providing electric energy.

The power consumption device provided by the embodiment of the application has the same technical effect due to the adoption of the battery provided by any one of the embodiments, and the details are not repeated herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a battery module in a battery provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a battery cell in a battery provided in an embodiment of the present application;

fig. 5 is an exploded schematic view of a battery provided in an embodiment of the present application, with a part of the structure omitted, where a denotes a first battery cell and B denotes a second battery cell;

fig. 6 is a schematic structural diagram of a support assembly in a battery provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of another support assembly for a battery provided in an embodiment of the present application;

fig. 8 is a schematic cross-sectional view of a battery provided in an embodiment of the present application;

fig. 9 is a partially enlarged view at C in fig. 8.

In the drawings, the drawings are not necessarily drawn to scale.

Description of the labeling:

1. a vehicle; 1a, a motor; 1b, a controller;

10. a battery; 11. a box body; 111. a first tank portion; 112. a second tank portion;

20. a battery module;

30. a battery cell; 30a, a first battery cell; 30b, a second battery cell; 31. a housing; 311. a housing; 311a, an opening; 312. an end cap; 32. an electrode assembly; 313. a first wall; 33. a pressure relief mechanism; 34. an electrode terminal;

40. a support assembly; 41. a frame; 41a, a convex portion; 411. a cross beam; 412. erecting a beam; 42. a partition plate; 42a, a groove;

50. an end plate;

x, thickness direction; y, a first direction; z, a second direction.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application, but are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "vertical" is not strictly vertical, but is within the tolerance of the error. "parallel" is not strictly parallel but is within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

In this application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, and the embodiment of the present application is not limited thereto. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in a packaging manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separator. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the current collector which is not coated with the positive active substance layer protrudes out of the current collector which is coated with the positive active substance layer, and the current collector which is not coated with the positive active substance layer is laminated to be used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative plate comprises a negative current collector and a negative active substance layer, the negative active substance layer is coated on the surface of the negative current collector, the current collector which is not coated with the negative active substance layer protrudes out of the current collector which is coated with the negative active substance layer, and the current collector which is not coated with the negative active substance layer is laminated to be used as a negative pole tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the diaphragm may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The inventor finds that after the weight of the battery is relatively large, systematic analysis and research are carried out on the structure and the assembly process of the battery, and as a result, the pressure relief structures of two battery monomers are generally arranged oppositely in the battery, and in order to reduce the risk that one of the two battery monomers arranged oppositely is actuated and then is sprayed towards the pressure relief mechanism of the other battery monomer, a partition plate structure is generally arranged between the two battery monomers arranged oppositely in the pressure relief mechanism so as to reduce the risk that the two battery monomers arranged oppositely in the pressure relief mechanism are sprayed oppositely to cause thermal runaway of the battery. The separator structure is usually a thick steel plate, which is heavy and increases the overall weight of the battery.

Based on the above problems discovered by the inventors, the inventors improved the structure of the battery, and the technical solution described in the embodiments of the present application is applicable to the battery and the electric device using the battery.

A battery provided according to an embodiment of the present application includes a plurality of battery cells and a support assembly. The battery monomer includes shell and pressure release framework, and the shell includes first wall, and first wall is located to pressure release mechanism. The plurality of battery cells include a first battery cell and a second battery cell, and the thermal stability of the first battery cell is higher than that of the second battery cell. Along the thickness direction of first wall, first battery monomer and second battery monomer are adjacent to be set up, and adjacent first battery monomer and second battery monomer's first wall opposite orientation. The support assembly is arranged between first walls in the first battery monomer and the second battery monomer which are adjacent along the thickness direction, the support assembly comprises a frame and a partition plate connected to the frame, and the size of the partition plate is smaller than that of the frame along the thickness direction.

The application provides a battery sets up the battery and includes first battery monomer and second battery monomer, and the free thermal stability of first battery is greater than the free thermal stability of second battery to set up the relative setting of the free pressure relief mechanism of first battery and second battery, reduce the two and to spouting and cause the free thermal runaway's of battery risk. Therefore, a thicker and heavier partition plate does not need to be arranged between the two, and only the support component which is lighter in weight and used for supporting the battery cell needs to be arranged, so that the whole weight of the battery is favorably reduced.

The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; the electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and electric tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.

For convenience of explanation, the following embodiments will be described by taking an electric device as an example of a vehicle.

As shown in fig. 1, a battery 10 is provided inside the vehicle 1. The battery 10 may be disposed at the bottom or the head or the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, and for example, the battery 10 may serve as an operation power source of the vehicle 1.

The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 10 to supply power to the motor 1a, for example, for operation power demand at the time of starting, navigation, and traveling of the vehicle 1.

In some embodiments of the present application, the battery 10 may be used not only as an operating power source of the vehicle 1, but also as a driving power source of the vehicle 1, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1.

Referring to fig. 2, the battery 10 includes battery cells (not shown in fig. 2). The battery 10 may further include a case for accommodating the battery cells.

The case 11 is used for accommodating the battery cells, and the case 11 may have various structures. In some embodiments, cabinet 11 may include a first cabinet portion 11 and a second cabinet portion 112. The first casing portion 111 and the second casing portion 112 are mutually covered. The first and second casing portions 111 and 112 together define a receiving space for receiving the battery cells. The second casing part 112 may be a hollow structure with one open end, the first casing part 111 is a plate-shaped structure, and the first casing part 111 covers the open side of the second casing part 112 to form the casing 11 with an accommodating space; the first tank portion 111 and the second tank portion 112 may be both hollow structures with one side open. The open side of the first casing 111 covers the open side of the second casing 112 to form a casing having an accommodation space. Of course, the first casing portion 111 and the second casing portion 112 may be in various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In order to improve the sealing performance of the first casing portion 111 and the second casing portion 112 after being connected, a sealing member, such as a sealant or a sealing ring, may be disposed between the first casing portion 111 and the second casing portion 112.

If the first box portion 111 is covered on the second box portion 112, the first box portion 111 can be also referred to as an upper box cover, and the second box portion 112 can be also referred to as a lower box body.

In the battery 10, there are a plurality of battery cells, and the plurality of battery cells may be connected in series, in parallel, or in series-parallel. The series-parallel connection means that a plurality of battery monomers are connected in series or in parallel. The plurality of battery cells may be directly connected in series or in parallel or in series-parallel, and then the whole body formed by the plurality of battery cells is accommodated in the box body 11, or the plurality of battery cells may be connected in series or in parallel or in series-parallel to form the battery module 20. A plurality of battery modules 20 are connected in series or in parallel or in series-parallel to form a whole, and are accommodated in the case 11.

In some embodiments, as shown in fig. 3, fig. 3 is a schematic structural view of the battery module 20 shown in fig. 2. In the battery module 20, there are a plurality of battery cells 30. The plurality of battery cells 30 are connected in series, in parallel, or in series-parallel to form the battery module 20. The plurality of battery modules 20 are connected in series or in parallel or in series-parallel to form a whole, and are accommodated in the case.

In some embodiments, the plurality of battery cells 30 in the battery module 20 may be electrically connected to each other through a bus member, so as to realize parallel connection, series connection or parallel connection of the plurality of battery cells 30 in the battery module 20.

Referring to fig. 4, fig. 4 is an exploded view of the battery cell 30 shown in fig. 3. The battery cell 30 provided by the embodiment of the application comprises an electrode assembly 32 and a shell 31, wherein the shell 31 is provided with a containing cavity, and the electrode assembly 32 is contained in the containing cavity.

In some embodiments, the case 31 may include a case 311 and an end cap 312, the case 311 is a hollow structure with one side open, and the end cap 312 covers the opening of the case 311 and forms a sealing connection to form a sealing space for accommodating the electrode assembly 32 and the electrolyte.

In assembling the battery cell 30, the electrode assembly 32 may be first placed in the case 311, the cap 312 may be fitted to the opening of the case 311, and the electrolyte may be injected into the case 311 through the electrolyte injection port of the cap 312.

In some embodiments, the housing 31 may also be used to contain an electrolyte, such as an electrolyte. The housing 31 may take a variety of configurations.

Fig. 4 shows a schematic structural diagram of a battery cell provided in an embodiment of the present application.

The housing 311 may be various shapes, such as a cylinder, a rectangular parallelepiped, or the like. The shape of the case 311 may be determined according to the specific shape of the electrode assembly 32. For example, if the electrode assembly 32 has a cylindrical structure, the case 311 may alternatively have a cylindrical structure. If the electrode assembly 32 has a rectangular parallelepiped structure, the case 311 may have a rectangular parallelepiped structure. In fig. 4, the case 311 and the electrode assembly 32 are each exemplarily in a rectangular parallelepiped structure.

The material of the housing 311 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and the embodiment of the present invention is not limited thereto.

The electrode assembly 32 accommodated in the case 311 may be one or more. In fig. 4, there are two electrode assemblies 32 accommodated in the case 311.

Fig. 5 is an exploded schematic view of a battery provided in an embodiment of the present application with a part of the structure omitted, and fig. 6 is a schematic view of a structure of the support assembly 40 in fig. 5.

As shown in fig. 5 and 6, a battery 10 provided according to an embodiment of the present application includes a plurality of battery cells 30 and a support assembly 40. The battery cell 30 includes a housing 31 and a pressure relief mechanism 33, the housing 31 includes a first wall 313, and the pressure relief mechanism 33 is disposed on the first wall 313. The plurality of battery cells 30 includes a first battery cell 30a and a second battery cell 30b, and the thermal stability of the first battery cell 30a is higher than that of the second battery cell 30 b. Along the thickness direction X of the first wall 313, the first battery cell 30a and the second battery cell 30b are adjacently disposed, and the first walls 313 of the adjacent first battery cell 30a and the second battery cell 30b face oppositely. The support assembly 40 is disposed between the first walls 313 of the adjacent first and second battery cells 30a and 30b, the support assembly 40 includes a frame 41 and a spacer 42 connected to the frame 41, and the spacer 42 has a size smaller than that of the frame 41 in the thickness direction X.

The pressure relief mechanism 33 refers to an element or a component that is actuated to relieve the internal pressure or temperature of the battery cell 30 when the internal pressure or temperature reaches a predetermined threshold. The pressure relief mechanism 33 may take the form of, for example, an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and may specifically adopt a pressure-sensitive or temperature-sensitive element or configuration, that is, when the internal pressure or temperature of the battery cell 30 reaches a predetermined threshold, the pressure relief mechanism 33 performs an action or a weak structure provided in the pressure relief mechanism 33 is broken, so as to form an opening or passage through which the internal pressure or temperature can be relieved, so as to reduce the risk of a decrease in the thermal stability of the battery cell 30.

The thermal stability of the first battery cell 30a may be higher than that of the second battery cell 30b by providing the material of the active material of the positive electrode sheets of both. For example, the second battery cell 30b may be provided as a lithium iron phosphate battery cell, and the first battery cell 30a may be provided as a ternary battery cell.

The first battery cell 30a and the second battery 10 are adjacently disposed along the thickness direction X of the first wall 313, and the first walls 313 of the adjacent first battery cell 30a and the adjacent second battery cell 30b face oppositely, that is, the pressure relief mechanisms 33 of the first battery cell 30a and the adjacent second battery cell 30b are oppositely disposed along the thickness direction X.

Alternatively, a plurality of battery cells 30 may be arranged in a direction perpendicular to the thickness direction X to form a battery cell string, the pressure relief mechanisms 33 of the battery cells 30 of the same battery cell string are oriented in the same direction, and the pressure relief mechanisms 33 of the battery cells 30 of two adjacent battery cell strings are oriented in opposite directions, that is, one battery cell string is arranged opposite to the pressure relief mechanism of one battery cell string adjacent to the battery cell string in the thickness direction X, and is arranged opposite to the pressure relief mechanism 33 of the other battery cell string. In this manner, the support member 40 may be disposed between the pressure relief mechanisms 33 of two battery cell strings adjacent in the thickness direction X.

Since the thermal stability of the first battery cell 30a is higher than that of the second battery cell 30b, when the pressure relief mechanism 33 of the second battery cell 30b actuates the pressure relief, the first battery cell 30a is not easily affected by the excrement sprayed from the second battery cell 30 b. When the first battery cell 30a is actuated to release the pressure, the pressure for releasing the pressure is low enough to cause thermal runaway of the second battery 10 disposed opposite thereto due to high thermal stability thereof. Therefore, the first battery cell 30a and the second battery cell 30b are arranged adjacently, and the first wall 313 faces oppositely, which is beneficial to reducing the risk of thermal runaway caused by opposite spraying of the adjacent battery cells 30.

The support assembly 40 is used for supporting the battery cells 30, and the risk of generating play between the battery cells 30 is reduced. The support assembly 40 is disposed between the first and second battery cells 30a and 30b adjacent in the thickness direction X.

Alternatively, the frame 41 may be a hollow tube, and the partition 42 may be a thin plate made of steel.

Alternatively, the partition 42 and the frame 41 may be connected by a snap connection, or a connector, which is not limited herein.

It is possible to arrange the frame 41 to include a cross member 411 and a vertical member 412 disposed perpendicular to each other, and to arrange the partition 42 between the two cross members 411 and the two vertical members 412 disposed opposite to each other. One frame 41 may be provided corresponding to one partition 42, or one frame 41 may be provided including a plurality of cross members 411 and a plurality of vertical members 412, and a plurality of partitions 42 may be provided corresponding thereto.

One separator 42 may be provided for one battery cell 30, or one separator 42 may be provided for a plurality of battery cells 30.

Depending on the number of the battery cells 30 arranged in the thickness direction X, the battery 10 may be provided to include one support member 40, or the battery 10 may be provided to include a plurality of support members 40.

It can be understood that, since the dimension of the partition plate 42 in the thickness direction X is smaller than the dimension of the frame 41 in the thickness direction X, while the frame 41 is utilized to provide a good supporting function for the partition plate 42 and the battery cell 30, the overall weight of the support assembly 40 can be reduced, and at the same time, the dimension of the battery cell 30 in the thickness direction X can be reduced, which is beneficial to improving the energy density of the battery 10.

The battery 10 provided by the embodiment of the application, because set up first battery monomer 30a and second battery monomer 30b and set up along thickness direction X is adjacent, can reduce and take place the risk of spouting along taking place between the battery monomer 30 that thickness direction X is adjacent, reduced the strength requirement to the supporting component 40 between the battery monomer 30. In this way, the support member 40 between the pressure relief mechanisms 33 of the battery cells 30 does not have to bear a large impact force, and thus a structure with a light weight or a thin thickness can be adopted to reduce the weight of the battery 10.

In some embodiments, the material of the separator 42 includes mica.

So, baffle 42 can be the mica sheet, and the density of mica sheet is less, and the heat-proof quality is better, and the material that sets up baffle 42 includes mica, is favorable to further reducing the weight of support assembly 40 to further reduce the battery monomer 30 of baffle 42 both sides and produce the risk of thermal runaway because of heat-conduction, be favorable to improving the security performance of battery 10.

In some embodiments, the material of the frame 41 comprises steel or iron pipe.

In this way, since the frame 41 is used as a main force-bearing component for supporting the partition 42 and the battery cell 30, and is made of steel pipe or iron pipe, the overall weight of the support assembly 40 can be reduced on the premise of ensuring the structural strength thereof.

In some embodiments, one separator 42 is disposed opposite to the first walls 313 of the plurality of battery cells 30 on the same side in the thickness direction X.

Thus, one partition plate 42 is arranged corresponding to a plurality of battery cells 30, so that the number of the partition plates 42 can be reduced, the number and the weight of the cross beams 411 in the frame 41 can be reduced, and the reduction of the overall weight of the support assembly 40 is facilitated.

Fig. 7 is a schematic structural diagram illustrating another support assembly 40 in the battery provided in the embodiment of the present application.

As shown in fig. 7, in some embodiments, the support assembly 40 includes a plurality of partitions 42, the plurality of partitions 42 extending along a first direction Y and being arranged along a second direction Z, the first direction Y, the second direction Z and the thickness direction X being perpendicular to each other two by two.

Specifically, the separator 42 is disposed to extend in the first direction Y, and is disposed opposite to at least one row of the battery cells 30 arranged in the first direction Y.

Therefore, the partition plate 42 extends along the first direction Y, and the corresponding cross beam 411 and the vertical beam 412 are not arranged inside the frame 41 along the first direction Y, so that the weight of the frame 41 and the occupied space thereof are further reduced, the weight of the battery 10 is reduced, and meanwhile, the arrangement density of the battery cells 30 along the first direction Y is favorably improved, and further, the energy density of the battery 10 is improved.

With continued reference to fig. 7, in some embodiments, the support assembly 40 includes a plurality of frames 41, the plurality of frames 41 are arranged along the second direction Z, and two adjacent frames 41 along the second direction Z have a gap therebetween.

The space between the frames 41 is a space through which gas can flow, and the space is not filled with other substances.

Battery 10 is at the in-process of cycle work, and battery cell 30 can produce the heat, sets up to have the space between the frame 41, can utilize the space between the frame 41 more timely distribute out the heat that battery cell 30 produced in the inside of battery 10, so, is favorable to improving battery 10's security performance.

Fig. 8 shows a schematic cross-sectional structural diagram of the battery 10 provided in the embodiment of the present application, and fig. 9 shows a partial enlarged view at C in fig. 8.

As shown in fig. 8 and 9, in some embodiments, the battery cell 30 includes an electrode terminal 34, and the electrode terminal 34 is provided to the first wall 313. The separator 42 has a groove 42a disposed opposite to the electrode terminal 34, and at least a portion of the electrode terminal 34 is received in the groove 42 a.

The electrode terminal 34 and the pressure relief mechanism 33 are disposed on the first wall 313, which is beneficial to improving the surface flatness of other parts of the single batteries 30 and is convenient for arrangement among the single batteries 30.

Alternatively, the entire electrode terminal 34 exposed to the outside of the battery cell 30 may be received in the groove 42a, or a portion of the electrode terminal 34 exposed to the outside of the battery cell 30 may be received in the groove 42 a.

In order to realize the series connection or the parallel connection between the battery cells 30, the electrode terminals 34 of the adjacent battery cells 30 are generally connected by a bus member, the separator 42 is provided with a groove 42a facing the electrode terminal 34, and the bus member may be provided in the groove 42 a.

Therefore, providing the separator 42 with the groove 42a disposed opposite to the electrode terminal 34 is advantageous to reduce the interval of the battery cells 30 in the thickness direction X, so that the structure inside the battery 10 is more compact to improve the energy density of the battery 10.

With continued reference to fig. 8 and 9, in some embodiments, battery 10 includes a case 11, and battery cell 30 and support assembly 40 are housed within case 11. The side of the frame 41 facing the battery cells 30 has a protrusion 41a, the protrusion 41a is provided between adjacent battery cells 30, and/or the protrusion 41a is provided between the battery 10 and the case 11.

Locate the convex part 41a between the battery monomer 30, perhaps, locate the convex part 41a between battery monomer 30 and box 11, all be favorable to improving the supporting role of frame 41 to battery monomer 30, reduce between the battery monomer 30, perhaps produce the risk of rocking between battery monomer 30 and the box 11, and then improve battery 10 overall structure's stability.

In some embodiments, the battery 10 includes a case 11 and an end plate 50, the battery cell 30 is housed in the case 11, and the end plate 50 is disposed between the battery cell 30 and the case 11. Both sides of the frame 41 are connected to the end plates 50 in a first direction Y perpendicular to the thickness direction X.

The end plate 50 may be used to support the battery cells 30, and a flow channel for a medium to flow may be further disposed inside the end plate 50 to cool or heat the battery 10.

Alternatively, the end plate 50 and the frame 41 may be bonded, welded, screwed, riveted, or the like.

It can be understood that, by connecting the two sides of the frame 41 along the first direction Y with the end plates 50, the support assembly 40 can be better positioned, the connection strength between the end plates 50 and the support assembly 40 is improved, and the stability of the overall structure of the battery 10 is improved.

In some embodiments, there is a gap between the support assembly 40 and the battery cell 30.

The gap between the support member 40 and the battery cell 30 is a space through which gas can flow, and is not filled with other substances.

Specifically, gaps are formed between the frame 41 and the battery cell 30 and between the separator 42 and the battery cell 30, so that heat generated by the battery cell 30 during the cycle operation can be dissipated through the gaps between the frame 41 and the battery cell 30 or between the separator 42 and the battery cell 30.

Therefore, a gap is formed between the supporting component 40 and the single battery 30, so that heat generated by the single battery 30 can be discharged in time, the risk of thermal runaway caused by overhigh local temperature of the battery 10 is reduced, and the safety performance of the battery 10 is improved.

In some embodiments, the energy density of the second battery cell 30b is higher than the energy density of the first battery cell 30 a.

The thermal stability of the first battery cell 30a is higher than that of the second battery cell 30b, and the thermal stability performance of the entire battery 10 can be improved, but the energy density of the entire battery 10 cannot be ensured. Setting the energy density of the second battery cell 30b to be higher than the energy density of the first battery cell 30a is advantageous to ensure that the battery 10 has a higher energy density while ensuring the thermal stability of the battery 10.

In some embodiments, the first battery cell 30a is a lithium iron phosphate battery cell.

Specifically, the first battery cell 30a is a lithium iron phosphate battery cell, and the material of the positive electrode plate of the first battery cell 30a includes a lithium iron phosphate material. The lithium iron phosphate monomer has good thermal stability, and the first battery monomer 30a is set to be a lithium iron phosphate battery monomer, which is beneficial to ensuring the thermal stability of the battery 10.

In some embodiments, the second battery cell 30b is a ternary battery cell.

Specifically, the second battery cell 30b is a ternary battery cell, and the material of the positive electrode sheet of the second battery cell 30b includes a ternary material. The ternary battery cell has good energy density. The second battery cell 30b is a ternary battery cell, which is beneficial to ensuring the energy density of the battery 10.

In some embodiments, the first battery cell 30a is a lithium iron phosphate battery cell, and the second battery cell 30b is a ternary battery cell.

It can be understood that the lithium iron phosphate battery cell has better thermal stability than the ternary battery cell, and the ternary battery cell has good energy density than the ferric phosphate power battery cell 30. The battery 10 is arranged to include a lithium iron phosphate battery cell and a ternary battery cell, and on the premise of ensuring the thermal stability of the battery 10, the battery 10 is ensured to have higher energy density.

As shown in fig. 5, in some embodiments, the plurality of battery cells 30 are arranged along a first direction Y, which is perpendicular to the thickness direction X. The first battery cells 30a and the second battery cells 30b are alternately arranged in the first direction Y.

Optionally, the plurality of battery cells 30 may be alternately arranged along a direction perpendicular to the thickness direction X, or the plurality of battery cells 30 may be alternately arranged along two directions perpendicular to the thickness direction X and perpendicular to each other, so as to be selected according to actual requirements.

The first battery cells 30a and the second battery cells 30b are alternately arranged along the first direction Y, such that each of the first battery cells 30a is disposed adjacent to the second battery 10, and each of the second battery cells 30b is also disposed adjacent to the first battery cell 30 a.

Thus, since the first battery cell 30a has higher thermal stability, the first battery cell 30a provides a protective barrier for the second battery cell 30b, which is beneficial to improving the overall thermal stability inside the battery 10. However, since the second battery cell 30b has a higher energy density, it is advantageous to further ensure the energy density of the battery 10.

Therefore, it is advantageous to improve the thermal stability of the battery 10 as much as possible to improve the safety performance of the battery 10 while ensuring the energy density of the battery 10.

In some embodiments, the battery cells 30 are also arranged along a second direction Z, with the first direction Y, the second direction Z, and the thickness direction X being perpendicular two by two. The maximum dimension of the single cells 30 along the first direction Y is greater than the maximum dimension along the second direction Z, and the number of the single cells 30 arranged along the first direction Y is greater than the number of the single cells 30 arranged along the second direction Z.

Alternatively, the first battery cells 30a and the second battery cells 30b may be arranged to be also alternately arranged in the second direction Z. To further improve the thermal stability and energy density of the battery 10.

The maximum dimension of the single cells 30 along the first direction Y is greater than the maximum dimension along the second direction Z, and the number of the single cells 30 arranged along the first direction Y is greater than the number of the single cells 30 arranged along the second direction Z, so that the dimension of the battery 10 along the first direction Y is greater than the dimension along the second direction Z, which is beneficial to the formation of a flat structure of the battery 10. When the battery 10 is mounted on an electric device such as a vehicle, the second direction Z can be set to be parallel to the height direction of the vehicle, so that in the vehicle, the battery cells 30 inside the battery 10 lie flat in the box body 11, and the number of the battery cells 30 in the battery 10 arranged along the second direction Z can be reasonably set according to the space of the height direction of the vehicle, so that the space of the height direction of the vehicle is reasonably utilized, and the compactness of the internal structure of the vehicle is improved.

The power utilization device provided according to the embodiment of the present application includes the battery 10 provided in any one of the above embodiments, and the battery 10 is used for providing electric energy. The power consumption device provided by the embodiment of the present application has the same technical effect due to the adoption of the battery 10 provided by any one of the above embodiments, and details are not described herein again.

While the present application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and particularly, features described in connection with the embodiments may be combined in any manner as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein, but rather to cover all embodiments falling within the scope of the appended claims.

Claims (14)

1. A battery, comprising:

the battery units comprise a shell and a pressure relief mechanism, the shell comprises a first wall, and the pressure relief mechanism is arranged on the first wall; the plurality of battery cells comprise a first battery cell and a second battery cell, and the thermal stability of the first battery cell is higher than that of the second battery cell; along the thickness direction of the first wall, the first battery cell and the second battery cell are adjacently arranged, and the first walls of the adjacent first battery cell and the adjacent second battery cell are oppositely faced;

the support assembly is arranged between the first walls of the first battery unit and the second battery unit which are adjacent to each other, the support assembly comprises a frame and a partition plate connected to the frame, and the size of the partition plate is smaller than that of the frame along the thickness direction.

2. The battery of claim 1, wherein the separator material comprises mica and/or the frame comprises steel or iron tubing.

3. The battery according to claim 1, wherein one of the separators is disposed opposite to the first walls of the plurality of battery cells on the same side in the thickness direction.

4. The cell defined in claim 1, wherein the support assembly comprises a plurality of the separators extending in a first direction and arranged in a second direction, the first direction, the second direction, and the thickness direction being perpendicular to one another.

5. The cell defined in claim 4, wherein the support assembly comprises a plurality of the frames, the plurality of frames being arranged along the second direction with a gap between two adjacent frames along the second direction.

6. The battery of claim 1, wherein the battery cell includes an electrode terminal disposed on the first wall;

the separator has a groove disposed opposite to the electrode terminal, and at least a portion of the electrode terminal is received in the groove.

7. The battery of claim 1, wherein the battery includes a case, the battery cell and the support assembly being received in the case; the side part of the frame, which faces the battery monomer, is provided with a convex part, the convex part is arranged between two adjacent battery monomers, and/or the convex part is arranged between the battery monomer and the box body.

8. The battery of claim 1, comprising a case and an end plate, the battery cell and the end plate being received in the case, the end plate being disposed between the battery cell and the case;

two sides of the frame are connected to the end plates along a first direction, which is perpendicular to the thickness direction.

9. The battery of claim 1, wherein the support assembly has a void between the support assembly and the battery cell.

10. The battery of claim 1, wherein the energy density of the second cell is higher than the energy density of the first cell.

11. The battery according to claim 10, wherein the first battery cell is a lithium iron phosphate battery cell, and/or the second battery cell is a ternary battery cell.

12. The battery of claim 10, wherein a plurality of the battery cells are arranged in a first direction, the first direction being perpendicular to the thickness direction;

along the first direction, the first battery cells and the second battery cells are alternately arranged.

13. The battery of claim 12, wherein the cells are further arranged in a second direction, the first direction, the second direction, and the thickness direction being perpendicular in pairs;

the maximum size of the single batteries along the first direction is larger than the maximum size of the single batteries along the second direction, and the number of the single batteries arranged along the first direction is larger than that of the single batteries arranged along the second direction.

14. An electrical device comprising a battery as claimed in any one of claims 1 to 13 for providing electrical energy.

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