CN212113761U - Lithium ion battery and electric automobile - Google Patents

Abstract

The embodiment of the utility model provides a lithium ion battery and electric automobile relates to the battery field. The lithium ion battery comprises a first metal plate, a second metal plate, a metal frame, an electric core, a pole column and an explosion-proof valve, wherein the first metal plate, the metal frame and the second metal plate are sequentially connected and enclose an installation cavity, the electric core is installed in the installation cavity, the pole column is arranged on the metal frame in an insulating mode and is electrically connected with the electric core, the explosion-proof valve is arranged on the metal frame, and a liquid injection hole is formed in the metal frame. The lithium ion battery and the electric automobile provided by the embodiment of the utility model have the advantages of simple process design and light weight of the soft package structure, and also have the advantages of aluminum packaging reliability, and can resist electrolyte corrosion for a long time; the embodiment of the utility model provides a dependable performance, low price to make lithium ion battery reach higher price/performance ratio.

Description

Lithium ion battery and electric automobile

Technical Field

The utility model relates to a field particularly, relates to a lithium ion battery and electric automobile.

Background

The lithium ion battery cell as the core power component of the power battery is a key ring for marketization of the electric automobile. The mainstream electric core packaging technology in the current market adopts a soft package or an aluminum shell as a packaging material, and the soft package or the aluminum shell has the technical advantages and disadvantages: the soft-packaged battery cell has the advantages of simple structure and packaging process, high weight energy density and low cost, but the packaging of the soft package is insufficient in long-term reliability, has the risk of liquid leakage after long-term use and brings the risk to the long-term reliable use of the electric automobile; although the aluminum shell package has high reliability, the structure and the process are complex, the weight energy density is low, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lithium ion battery and an electric automobile, which not only has the advantages of simple process design and light weight of a soft package structure, but also has the advantages of aluminum packaging reliability, and can endure electrolyte corrosion for a long time; the embodiment of the utility model provides a dependable performance, low price to make lithium ion battery reach higher price/performance ratio.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment of the present invention provides a lithium ion battery, including first metal plate, second metal plate, metal frame, electric core, utmost point post and explosion-proof valve, first metal plate metal frame and second metal plate connect gradually to enclose into the installation cavity, electric core install in the installation cavity, utmost point post set up insulatingly in on the metal frame, and with electric core electricity is connected, explosion-proof valve set up in on the metal frame, be provided with on the metal frame and annotate the liquid hole.

In an optional embodiment, the lithium ion battery further includes an insulating sealing member, and the electrode post is insulatively sealed on the metal frame by the insulating sealing member.

In an alternative embodiment, the pole is riveted to the metal frame.

In an optional embodiment, the battery cell includes a body, and a first tab and a second tab disposed on the body, and the electrode posts include a first electrode post electrically connected to the first tab and a second electrode post electrically connected to the second tab.

In an alternative embodiment, the first pole post and the second pole post are located on the same side or different sides of the metal frame.

In an optional embodiment, the shape of the battery cell corresponds to the shape of the metal frame.

In an alternative embodiment, a high thermal conductive coating or an insulating composite coating is provided on the outer surface of the first metal plate and/or the second metal plate.

In an alternative embodiment, the high thermal conductivity coating is an electronically insulating coating; the outer surface of the insulating composite coating is a graphite heat-conducting composite film or a graphene heat-conducting composite film.

In an alternative embodiment, the first metal plate and the second metal plate are made of stainless steel, aluminum or an alloy material.

In a second aspect, an embodiment of the present invention provides an electric vehicle, including the lithium ion battery according to any one of the foregoing embodiments.

The embodiment of the utility model provides a lithium ion battery and including this lithium ion battery's electric automobile: the outer packaging structure of the lithium ion battery is formed by a first metal plate, a second metal plate and a metal frame in an enclosing mode. The pole column and the explosion-proof valve are both arranged on the metal frame, and the liquid injection hole is also arranged on the metal frame. The pole is correspondingly connected with the pole lug of the battery cell, and the liquid injection hole is used for injecting electrolyte into an installation space enclosed by the first metal plate, the second metal plate and the metal frame. The utility model discloses lithium ion battery's extranal packing is made by metal material, and the thickness of first metal sheet wherein, second metal sheet and metal frame is thinner, can be guaranteeing lithium ion battery's structural reliability to higher volume energy density has. The lithium ion battery has the advantages of simple process design and light weight of the soft package structure, has the advantage of aluminum packaging reliability, and can resist electrolyte corrosion for a long time; the embodiment of the utility model provides a dependable performance, low price to make lithium ion battery reach higher price/performance ratio.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a lithium ion battery provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the lithium ion battery in fig. 1 at another viewing angle;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 4 is an exploded view of the lithium ion battery of fig. 1 or fig. 1;

fig. 5 is a schematic structural diagram of a lithium ion battery according to another embodiment of the present invention;

fig. 6 is a schematic block diagram of a flow of a manufacturing method of a lithium ion battery according to an embodiment of the present invention.

Icon: 100-a lithium ion battery; 110-a first metal plate; 120-a second metal plate; 130-a metal frame; 140-electric core; 150-pole; 160-explosion-proof valve; 170-liquid injection hole; 180-insulating seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, a lithium ion battery 100 according to an embodiment of the present invention is shown, where the lithium ion battery 100 can be applied to an electric device or apparatus and provides electric energy for the electric device or apparatus. This electric equipment or device can be electric automobile etc. promptly, the utility model discloses lithium ion battery 100 that the embodiment provided can be applied to electric automobile or other electric equipment or device.

The lithium ion battery 100 provided by the embodiment of the utility model can not only take into account the advantages of the soft package structure, simple process design and light weight, but also take into account the advantage of the aluminum packaging reliability, and can endure the electrolyte corrosion for a long time; the embodiment of the utility model provides a dependable performance, low price to make lithium ion battery 100 reach higher price/performance ratio.

The embodiment of the present invention provides an embodiment, this lithium ion battery 100 includes first metal plate 110, second metal plate 120, metal frame 130, electric core 140, utmost point post 150 and explosion-proof valve 160, and first metal plate 110, metal frame 130 and second metal plate 120 connect gradually to enclose into the installation cavity, and electric core 140 installs in the installation cavity, and utmost point post 150 sets up on metal frame 130 insulatingly, and is connected with electric core 140 electricity, and explosion-proof valve 160 sets up on metal frame 130, is provided with on the metal frame 130 and annotates liquid hole 170.

In the embodiment of the present invention, the mounting cavity defined by the first metal plate 110, the second metal plate 120, and the metal frame 130 is used for mounting the battery cell 140, that is, the first metal plate 110, the second metal plate 120, and the metal frame 130 are an outer packaging structure of the lithium ion battery 100.

Alternatively, for the embodiment of the present invention, the outer packaging structure may be made of stainless steel material, i.e. the first metal plate 110, the second metal plate 120 and the metal frame 130 are all stainless steel structures. Of course, without limitation, in other embodiments of the present invention, the outer packaging structure may be made of pure aluminum or aluminum alloy.

It should be understood that the stainless steel or aluminum itself has a better thermal conductivity than the aluminum-plastic composite film or the steel-plastic composite film, has a high thermal conductivity, and can eliminate the thermal conductive aluminum plate between the battery cells 140 in the soft package module, further improving the energy density of the power battery pack. Meanwhile, the cost of the packaging material can be reduced, and the cost performance of the product is favorably improved.

Alternatively, the first metal plate 110, the second metal plate 120 and the metal frame 130 are made of the same material, but this is not necessarily the case, and the first metal plate 110, the second metal plate 120 and the metal frame 130 may be made of different materials.

Alternatively, when the first metal plate 110, the second metal plate 120, and the metal frame 130 are stainless steel materials, they may be stainless steel materials such as austenitic stainless steel, ferritic stainless steel, or austenitic-ferritic duplex stainless steel. Of course, the first metal plate 110, the second metal plate 120 and the metal frame 130 may be made of any stainless steel material, for example, the first metal plate 110, the second metal plate 120 and the metal frame 130 are all made of austenitic stainless steel, or the first metal plate 110 is made of austenitic stainless steel, the second metal plate 120 and the metal frame 130 is made of ferritic stainless steel, etc.

Alternatively, when the first metal plate 110, the second metal plate 120, and the metal frame 130 are aluminum alloy materials, they may be 1-series pure aluminum or aluminum alloy, 3-series aluminum-manganese alloy, 5-series aluminum-magnesium alloy, 6-series aluminum-silicon alloy, or the like. Of course, the first metal plate 110, the second metal plate 120, and the metal frame 130 may be made of any aluminum alloy material, for example, the first metal plate 110, the second metal plate 120, and the metal frame 130 are all 3-series aluminum-manganese alloys, or the first metal plate 110 is a 3-series aluminum-manganese alloy, and the second metal plate 120 and the metal frame 130 are 5-series aluminum-magnesium alloys.

Optionally, the first metal plate 110 and the second metal plate 120 have substantially equal thicknesses, so that the first metal plate 110 and the second metal plate 120 are manufactured from the same metal plate, thereby making the manufacturing process of the lithium ion battery 100 simpler. The thickness of the first metal plate 110 may range from 0.02 mm to 0.2mm inclusive, for example, the thickness of the first metal plate 110 is 0.03 mm; further, the thickness of the first metal plate 110 may range from 0.05mm to 0.15mm (inclusive), for example, the thickness of the first metal plate 110 is 0.10 mm; likewise, the thickness of the second metal plate 120 may range from 0.02 mm to 0.2mm (inclusive), for example, the thickness of the second metal plate 120 is 0.04 mm; further, the thickness of the second metal plate 120 may range from 0.05mm to 0.15mm inclusive, for example, the thickness of the second metal plate 120 is 0.12 mm.

It should be particularly noted that the thicknesses of the first metal plate 110 and the second metal plate 120 may be substantially equal, or may be flexibly set to be unequal according to actual design requirements, for example, the thickness of the first metal plate 110 is greater than the thickness of the second metal plate 120, and the embodiment of the present invention does not specifically limit the thickness relationship between the first metal plate 110 and the second metal plate 120.

Alternatively, the thickness of the metal frame 130 may range from 0.02 mm to 2.00mm (inclusive), for example, the thickness of the metal frame 130 is 0.05 mm; further, the thickness of the metal frame 130 is 0.10-1.0mm (inclusive), for example, the thickness of the metal frame 130 is 0.15 mm.

In the embodiment of the present invention, the size of the installation cavity enclosed by the first metal plate 110, the second metal plate 120 and the metal frame 130 is slightly larger than the size of the battery cell 140, that is, the size of the installation cavity is slightly larger than the size of the battery cell 140, so as to install the battery cell 140 in the installation cavity. The volume energy density of the power battery can be improved, and the thicknesses of the first metal plate 110, the second metal plate 120 and the metal frame 130 are thinner, so that the volume energy density is further improved.

Alternatively, the connection between the first metal plate 110 and the second metal plate 120 and the metal frame 130 includes, but is not limited to, laser welding, electromagnetic welding, resistance welding, and the like.

In an alternative embodiment, the lithium ion battery 100 may further include an insulating seal 180, and the pole 150 is insulatively sealed on the metal frame 130 by the insulating seal 180.

Further, the material of the insulating sealing member 180 may be a polymer insulating material, an engineering plastic, or a ceramic insulating material.

Optionally, the terminal post 150 may be riveted on the metal frame 130, and the riveting process is simple, the technical principle is mature, and the manufacture is more simple and convenient.

In an optional embodiment, the battery cell 140 may include a body, and a first tab and a second tab disposed on the body, and the terminal 150 includes a first terminal electrically connected to the first tab and a second terminal electrically connected to the second tab.

It should be understood that the first tab and the second tab are positive and negative tabs, respectively, the first pole column and the second pole column are positive and negative poles 150, respectively, and the positive and negative tabs and the positive and negative poles 150 correspond to each other one by one.

In alternative embodiments, the first and second poles are located on the same side or different sides of the metal frame 130. In the lithium ion battery 100 shown in fig. 1 and 2, the first electrode post and the second electrode post are located on two opposite sides, and in the solution shown in fig. 5, the first electrode post and the second electrode post are located on the same side of the metal frame 130. The embodiment of the utility model provides a do not specifically prescribe a limit to the position on first utmost point post and the metal frame 130 of second utmost point post place, can be in order to set up in a flexible way as required.

In an alternative embodiment, the shape of the battery cell 140 corresponds to the shape of the metal frame 130. The metal frame 130 may be rectangular, and at this time, the shape of the battery cell 140 is a rectangle corresponding to the shape of the metal frame 130; the metal frame 130 may also have other shapes, such as a diamond shape or an irregular shape, and accordingly, the shape of the battery cell 140 corresponds to the shape of the metal frame 130, so that the manufactured lithium ion battery 100 has stronger adaptability and meets the requirements of different products on corresponding battery shapes.

In an alternative embodiment, a highly thermally conductive coating or an insulating composite coating is provided on the outer surface of the first metal plate 110 and/or the second metal plate 120.

Further, the high thermal conductivity coating may be an electronic insulating coating; the outer surface of the insulating composite coating can be a graphite heat-conducting composite film or a graphene heat-conducting composite film.

Optionally, a high thermal conductivity coating is coated on the outer surface of the first metal plate 110 and/or the second metal plate 120, and the coating is an electronic insulating coating.

Optionally, a layer of high thermal conductive and insulating composite coating is directly adhered to the outer surface of the first metal plate 110 and/or the second metal plate 120, and the coating is a graphite thermal conductive composite film or a graphene thermal conductive composite film, the outer surface of which is PET.

It should be noted that the above-mentioned "the first metal plate 110 and/or the second metal plate 120" means that at least one of the front and the back is satisfied, for example, "the high thermal conductive coating is provided on the outer surface of the first metal plate 110 and/or the second metal plate 120" means at least the following three cases: firstly, a high thermal conductive coating is disposed on the outer surface of the first metal plate 110; secondly, a high thermal conductive coating is disposed on the outer surface of the second metal plate 120; third, the outer surfaces of the first metal plate 110 and the second metal plate 120 are all provided with high thermal conductive coatings.

Referring to fig. 6, an embodiment of the present invention provides a method for manufacturing a lithium ion battery 100, for manufacturing the lithium ion battery 100, the method includes the following steps.

Step S100: the post 150 and the explosion-proof valve 160 are provided on the metal frame 130, and the liquid injection hole 170 is formed in the metal frame 130.

In an alternative embodiment, the step S100 may include the sub-step S110: the post 150 is riveted to the metal frame 130, and the explosion-proof valve 160 is welded to the metal frame 130.

It should be understood that the post 150 and the explosion-proof valve 160 may be located on the same side frame of the metal frame 130 or located on different side frames after the metal frame 130 is molded.

Step S200: the prepared tab of the battery cell 140 is electrically connected to the corresponding terminal 150, and the battery cell 140 is fixed to the metal frame 130.

Step S300: the first metal plate 110 and the second metal plate 120 are disposed on opposite sides of the metal frame 130, so that the battery cell 140 is located in an installation cavity surrounded by the first metal plate 110, the metal frame 130, and the second metal plate 120.

In an alternative embodiment, step S300 may comprise the sub-steps of: the first metal plate 110 and the second metal plate 120 are welded on opposite sides of the metal frame 130 by means including laser welding, electromagnetic welding, and resistance welding.

Of course, before performing the above steps S100 to S300, a positive electrode sheet manufacturing step, a negative electrode sheet manufacturing step, a separator preparation step, an electrolyte preparation step, and a battery cell 140 preparation step may also be included, which are respectively described below.

The manufacturing step of the positive pole piece comprises the following steps: mixing a positive electrode active material NMC (811), a conductive agent carbon black SP (TIMCAL) and a binder PVDF (Arkema) according to a mass ratio of 96:2:2 approximately, adding NMP in a volume, and stirring by a stirrer to form uniform and stable positive electrode slurry; and uniformly coating the positive electrode slurry on a positive current collector aluminum foil, drying, rolling, slitting and film cutting to obtain the positive electrode piece.

A negative pole piece manufacturing step: mixing a negative active material graphite, a conductive agent acetylene black, a thickening agent CMC and a binder SBR according to a mass ratio of 96.5:0.5:1.5:1.5 approximately, adding solvent deionized water, and stirring in a stirrer to obtain uniform and stable negative slurry; and uniformly coating the negative electrode slurry on a copper foil of a negative current collector, drying, rolling, slitting and film cutting to obtain a negative electrode pole piece.

Preparing an isolating membrane: selecting a polyethylene porous membrane as a separation membrane, and cutting the polyethylene porous membrane into corresponding widths according to the design size for later use.

The preparation method of the electrolyte comprises the following steps: an organic solvent was obtained by mixing Ethylene Carbonate (EC), Ethyl Methyl Carbonate (EMC), and diethyl carbonate (DEC) approximately in a volume ratio of 1:1:1, and then a sufficiently dried lithium salt LiPF6 was dissolved in the mixed solvent to prepare an electrolyte solution having a concentration of approximately 1 mol/L.

The preparation steps of the bare cell 140 of the lithium ion battery 100 are as follows: stacking the positive pole piece, the isolating film and the negative pole piece in a lamination mode to enable the isolating film to be positioned between the positive pole piece and the negative pole piece to play an isolating role, wrapping a circle of isolating film after stacking is completed, and sticking and fixing the isolating film by adhesive tape to obtain a bare cell 140; and then, the procedures of hot pressing of the bare cell 140, Tab (Tab) welding and the like are completed.

Meanwhile, it is also necessary to manufacture the first metal sheet, the second metal sheet and the metal frame 130 according to preset design requirements, for example, the metal frame 130 is manufactured by using a stainless steel strip having a thickness of 1mm, and the above step S100 is performed on the surface thereof. Then, the metal frame 130 is welded into a set shape, such as a rectangular frame body. The first metal plate 110 and the second metal plate 120 may be manufactured by cutting a certain thickness, i.e., a metal plate material, into a predetermined shape and size, for example, machining a stainless steel plate having a thickness of 0.1mm into a shape and size corresponding to the metal frame 130, thereby manufacturing the first metal plate 110 and the second metal plate 120.

In an optional embodiment, the method may further include: a highly thermally conductive coating or an insulating composite coating is provided on the first metal plate 110 and the second metal plate 120.

After the step S300, the battery cell 140 may be baked, injected with an electrolyte, formed, exhausted, sealed, and tested, so as to obtain the finished lithium ion battery 100.

The embodiment of the utility model provides an adopt the mode of components of a whole that can function independently equipment to accomplish lithium ion battery 100's extranal packing and drawing forth of positive negative pole utmost point ear: the outer package structure of the lithium ion battery 100 is assembled by welding two ultra-thin metal plates (i.e., the first metal plate 110 and the second metal plate 120) to a metal frame 130. The metal frame 130 is provided with positive and negative electrode posts 150, complete insulation is achieved between the electrode posts 150 and the metal frame 130 through polymer plastic or ceramic insulating materials, and the electrode posts 150 are firmly connected and well sealed with the metal frame 130 in a riveting mode. The metal frame 130 is also provided with an explosion-proof valve 160 and a liquid injection hole 170. The electrode posts 150, the explosion-proof valve 160 and the liquid injection hole 170 are processed and manufactured on the metal frame 130 in advance, when the battery is assembled, the prefabricated positive and negative electrode tabs of the battery cell 140 are welded with the positive and negative electrode posts 150 corresponding to the metal frame 130, after dust removal and tab support installation are completed, the battery cell 140 and the metal frame 130 are fixedly assembled together, then two ultrathin metal sheets (namely, the first metal plate 110 and the second metal plate 120) are respectively covered and buckled on the upper and lower large surfaces of the metal frame 130, and then the first metal plate 110 and the second metal plate 120 are respectively welded with the metal frame 130, so that the battery assembly can be completed.

The lithium ion battery 100 manufactured by the manufacturing method of the lithium ion battery 100 has the advantages of high energy density, good heat dissipation effect, high safety, high packaging strength, high electrolyte resistance, good long-term reliability, lower cost and the like.

An embodiment of the present invention provides an electric vehicle, which includes the lithium ion battery 100 according to any one of the foregoing embodiments.

Please refer to fig. 1 to fig. 6, to sum up, the lithium ion battery 100 and the manufacturing method thereof, and the electric vehicle including the lithium ion battery 100 according to the embodiment of the present invention: the exterior structure of the lithium ion battery 100 is surrounded by the first metal plate 110, the second metal plate 120, and the metal frame 130. The post 150 and the explosion-proof valve 160 are both disposed on the metal frame 130, and the liquid injection hole 170 is also disposed on the metal frame 130. The electrode post 150 is correspondingly connected to an electrode tab of the battery cell 140, and the electrolyte injection hole 170 is used for injecting electrolyte into an installation space defined by the first metal plate 110, the second metal plate 120 and the metal frame 130. The utility model discloses lithium ion battery 100's extranal packing is made by metal material, and the thickness of first metal sheet 110, second metal sheet 120 and metal frame 130 wherein is thinner, can be guaranteeing lithium ion battery 100's structural reliability to higher volume energy density has. Namely, the lithium ion battery 100 has the advantages of simple process design and light weight of a soft package structure, has the advantage of aluminum packaging reliability, and can resist electrolyte corrosion for a long time; the embodiment of the utility model provides a dependable performance, low price to make lithium ion battery 100 reach higher price/performance ratio. Meanwhile, the manufacturing method of the lithium ion battery 100 is simple in steps and easy to implement.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a lithium ion battery, its characterized in that includes first metal sheet, second metal sheet, metal frame, electric core, utmost point post and explosion-proof valve, first metal sheet metal frame and second metal sheet connect gradually to enclose into the installation cavity, electric core install in the installation cavity, utmost point post set up insulatedly in on the metal frame, and with electric core electricity is connected, explosion-proof valve set up in on the metal frame, be provided with on the metal frame and annotate the liquid hole.

2. The lithium ion battery of claim 1, further comprising an insulating seal, wherein the post is insulatively sealed to the metal frame by the insulating seal.

3. The lithium ion battery of claim 2, wherein the post is riveted to the metal frame.

4. The lithium ion battery of claim 1, wherein the battery cell comprises a body, and a first tab and a second tab disposed on the body, and the terminal comprises a first terminal electrically connected to the first tab and a second terminal electrically connected to the second tab.

5. The lithium ion battery of claim 4, wherein the first and second poles are located on the same side or different sides of the metal frame.

6. The lithium ion battery of claim 1, wherein the shape of the cell corresponds to the shape of the metal frame.

7. The lithium ion battery according to any of claims 1-6, wherein the first metal plate and/or the second metal plate is provided with a highly thermally conductive coating or an insulating composite coating on its outer surface.

8. The lithium ion battery of claim 7, wherein the high thermal conductivity coating is an electronically insulating coating; the outer surface of the insulating composite coating is a graphite heat-conducting composite film or a graphene heat-conducting composite film.

9. The lithium ion battery of any of claims 1-6, wherein the first metal plate and the second metal plate are made of stainless steel, aluminum, or an alloy material.

10. An electric vehicle comprising the lithium ion battery according to any one of claims 1 to 9.

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