CN216054859U - Battery cell, battery, electric device, and apparatus for manufacturing battery cell - Google Patents

Abstract

The embodiment of the application provides a battery monomer, a battery, electric equipment and a manufacturing device of the battery monomer, wherein the battery monomer comprises a shell, a first main body part and a second main body part, the first main body part is arranged in the shell and comprises a first positive plate and a first negative plate, the second main body part is arranged in the shell and comprises a second positive plate and a second negative plate, the first main body part and the second main body part are arranged at intervals along a first direction, one end, far away from the second main body part, of the first positive plate protrudes out of the first main body part and is in contact with a first inner surface of the shell, and the first negative plate is insulated from the first inner surface of the shell; and/or one end of the second positive plate, which is far away from the first main body part along the first direction, protrudes out of the second main body part and is in contact with the second inner surface of the shell, the second negative plate is insulated from the second inner surface of the shell, and the first inner surface and the second inner surface are oppositely arranged.

Description

Battery cell, battery, electric device, and apparatus for manufacturing battery cell

Technical Field

The present application relates to the field of battery technologies, and in particular, to a battery cell, a battery, an electric device, and a device for manufacturing the battery cell.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

In the use process of charging and discharging of the battery, the battery core can generate heat, and the service life of the battery is influenced.

Disclosure of Invention

The application provides a battery monomer, battery, consumer and free manufacturing installation of battery can accelerate the heat dissipation of electric core, improves the life of battery.

In a first aspect, the present application provides a battery cell comprising:

a housing;

the first main body part is arranged in the shell and comprises a first positive plate and a first negative plate; and

the second main body part is arranged in the shell and comprises a second positive plate and a second negative plate;

the first main body part and the second main body part are arranged at intervals along the first direction, one end, far away from the second main body part, of the first positive plate along the first direction protrudes out of the first main body part and is in contact with the first inner surface of the shell, and the first negative plate is insulated from the first inner surface of the shell; and/or one end of the second positive plate, which is far away from the first main body part along the first direction, protrudes out of the second main body part and is in contact with the second inner surface of the shell, the second negative plate is insulated from the second inner surface of the shell, and the first inner surface and the second inner surface are oppositely arranged.

In the embodiment of the application, one end of the first positive plate of the first main body part, which is far away from the second main body part along the first direction, protrudes out of the first main body part and is in direct contact with the first inner surface of the casing, and one end of the second positive plate of the second main body part, which is far away from the first main body part along the first direction, protrudes out of the second main body part and is in direct contact with the second inner surface of the casing, namely, both ends of the electrode assembly can be in direct contact with the casing, so that the area of the whole battery cell formed by the first electrode assembly and the second electrode assembly, which is in direct contact with the casing, can be increased, heat generated inside the battery cell can be more quickly dissipated through direct contact with the casing, thereby improving the heat dissipation capacity of the battery cell, preventing the heat from accumulating in the casing to cause the overhigh temperature of the battery, and effectively prolonging the service life of the battery.

In some embodiments, the first positive electrode sheet includes a first current collector and a first active material layer formed on the first current collector, and an end of the first current collector away from the second main body portion in the first direction protrudes out of the first active material layer and contacts with the first inner surface of the case; the second positive plate comprises a second current collector and a second active material layer formed on the second current collector, and one end, far away from the first main body part, of the second current collector along the first direction protrudes out of the second active material layer and is in contact with the second inner surface of the shell.

In this embodiment, the first current collector collects the current generated by the first active material layer to form a larger current to be output to the outside. The first current collector is used as a carrier for current collection and is a component which can generate heat easily, so that the first current collector is selected to extend out relative to the first main body part in the direction close to the shell, so that the first current collector is in direct contact with the shell, the heat transfer efficiency can be effectively improved, and the temperature of a battery monomer can be reduced quickly.

The second current collector collects the current generated by the second active material layer so as to form larger current to be output outwards. The second current collector is used as a carrier for current collection and is a component which can generate heat easily, so that the second current collector is selected to extend out relative to the second main body part in the direction close to the shell, so that the second current collector is in direct contact with the shell, the heat transfer efficiency can be effectively improved, and the temperature of the battery monomer can be reduced quickly.

In some embodiments, a first preset distance is provided between one end of the first negative electrode piece away from the second main body part along the first direction and the first inner surface of the casing, and a second preset distance is provided between one end of the second negative electrode piece away from the first main body part along the first direction and the second inner surface of the casing. Therefore, the first negative plate and the shell and the second negative plate and the shell are all kept insulated, and the situation that the first positive plate and the first negative plate are conducted electrically due to the contact of the first positive plate and the shell or the second positive plate and the second negative plate are conducted electrically due to the contact of the second positive plate and the shell to cause circuit short circuit and influence the safety of a battery cell is prevented.

In some embodiments, the battery cell further includes a first positive tab and a first negative tab extending from the first main body portion, and a second positive tab and a second negative tab extending from the second main body portion, the first positive tab and the first negative tab being disposed at an end of the first main body portion near the second main body portion along the first direction, and the second positive tab and the second negative tab being disposed at an end of the second main body portion near the first main body portion along the first direction.

In the above embodiments, the first positive tab, the first negative tab, the second positive tab and the second negative tab are disposed in the space between the first main body portion and the second main body portion, which is beneficial to increasing the direct contact area between the electrode assembly and the casing and enhancing the heat transfer effect between the electrode assembly and the casing. In addition, the distance between the first positive tab and the second positive tab and the distance between the first negative tab and the second negative tab can be shortened, a current transmission path is shortened, energy consumption is reduced, heat generation is reduced, and the problem that the service life and the use safety are influenced due to overhigh temperature of a battery monomer is solved.

In some embodiments, the battery cell further includes a bracket disposed between the first main body portion and the second main body portion to maintain the first positive electrode tab in contact with the first inner surface of the case and to maintain the second positive electrode tab in contact with the second inner surface of the case.

In the above embodiment, through setting up the support, can play the supporting role to first main part and second main part, make the first positive plate and the first internal surface of casing keep in contact to and make the second positive plate and the second internal surface of casing keep in contact, prevent to cause the first internal surface that the casing was kept away from to first positive plate or the second internal surface that the casing was kept away from to the second positive plate because self gravity or external force scheduling problem to influence heat transfer efficiency, reduce the radiating rate, cause the battery monomer high temperature.

In some embodiments, the bracket includes a first support portion supported between the first body portion and the first positive tab and between the first body portion and the first negative tab, a second support portion supported between the second body portion and the second positive tab and between the second body portion and the second negative tab, and a third support portion connected between the first support portion and the second support portion. The bracket with the structure has the advantages that when the single battery is in a working state, the first electrode assembly and the second electrode assembly can be effectively supported no matter which one of the first electrode assembly and the second electrode assembly is positioned above, and the mounting and the operation are convenient.

In some embodiments, the battery cell further includes a first connection tab, a second connection tab, a positive post, and a negative post, the first positive tab and the second positive tab are both connected to the first connection tab, the first connection tab is connected to the positive post, the first negative tab and the second negative tab are both connected to the second connection tab, and the second connection tab is connected to the negative post.

In some of the above embodiments, the first positive tab and the second positive tab are both connected to the first adaptor sheet, and the first negative tab and the second negative tab are both connected to the second adaptor sheet, so that the first electrode assembly and the second electrode assembly realize a common adaptor sheet, the number of components of the battery cell can be reduced, and the cost can be saved; meanwhile, the shared adapter plate can simplify the structural arrangement inside the battery monomer, save space and reduce the size of the battery monomer.

In some embodiments, the positive post is mounted to a first side of the housing and the negative post is mounted to a second side of the housing, the first side being opposite the second side, and both the first side and the second side being parallel to the first direction.

In this embodiment, set up positive post and negative pole post respectively in the both sides relative to first direction of casing, be convenient for make the first positive ear and the positive ear of second that lie in between first main part and the second main part be connected with positive post through horizontal extension to and make the first negative pole ear and the negative pole ear that lie in between first main part and the second main part be connected with the negative pole post through horizontal extension, can make the length of first adaptor piece and second adaptor piece shorter like this, through shortening the length of first adaptor piece and second adaptor piece, can reduce circuit loss, reduce thermal production.

In some embodiments, the battery cell further includes a first end cap and a second end cap, the first side of the housing is provided with a first opening, the second side of the housing is provided with a second opening, the first end cap is used for blocking the first opening, and the second end cap is used for blocking the second opening. Through setting up two end covers, can pack into the casing along the direction with first direction vertically earlier electrode subassembly, then two openings are sealed respectively to two end covers of rethread, improve the convenience of equipment.

In some embodiments, the battery cell further includes a first sleeve, the positive post includes a first inner pole and a first outer pole, the first sleeve is mounted on the first end cover, the first outer pole is disposed on the outer side of the first end cover and connected with the first sleeve, the first rotation tab is connected with the first end of the first inner pole, and the second end of the first inner pole passes through the first sleeve and is connected with the first sleeve on the outer side of the housing. The structure can improve the convenience of the assembly of the battery monomer, is favorable for realizing the fixation and connection of the first inner pole and the first sleeve outside the shell, and improves the convenience of operation.

In some embodiments, the single battery further includes a second sleeve, the negative pole post includes a second inner pole and a second outer pole, the second sleeve is mounted on the second end cover, the second outer pole is disposed on the outer side of the second end cover and connected to the second sleeve, the second adapter plate is connected to the second end of the second inner pole, and the second end of the second inner pole passes through the second sleeve and is connected to the second sleeve on the outer side of the housing. The structure can improve the convenience of the assembly of the battery monomer, is favorable for realizing the fixation and connection of the second inner pole and the second sleeve outside the shell, and improves the convenience of operation.

In some embodiments, the first switching piece comprises a first connecting part extending along a direction perpendicular to the first direction, the first connecting part is connected with the first positive tab and the second positive tab, and the end of the first connecting part close to the positive post is connected with the positive post; or the first rotating connection piece comprises a first connection part extending along the direction perpendicular to the first direction and a second connection part extending along the direction parallel to the first direction, the first connection part and the second connection part are connected into an L shape, the first connection part is connected with the first positive lug and the second positive lug, and the second connection part is connected with the positive post. This structure is advantageous in enhancing the stability of the electrical connection of the first tab to the positive post by increasing the contact area of the first tab to the positive post.

In some embodiments, the second interposer includes a third connection portion extending in a direction perpendicular to the first direction, the third connection portion being connected to the first negative tab and the second negative tab, and an end of the third connection portion near the negative post being connected to the negative post; or the second adapter sheet comprises a third connecting part extending in the direction perpendicular to the first direction and a fourth connecting part extending in the direction parallel to the first direction, the third connecting part and the fourth connecting part are connected into an L shape, the third connecting part is connected with the first negative pole lug and the second negative pole lug, and the fourth connecting part is connected with the negative pole column. The structure is beneficial to enhancing the electrical connection stability of the second adapter sheet and the negative pole column by increasing the contact area of the second adapter sheet and the negative pole column.

In some embodiments, the battery cell further includes a first insulator disposed within the housing, the first insulator for electrically isolating the negative post from the housing. Through setting up first insulating part, can reduce positive negative pole short circuit risk, improve the free safety in utilization of battery.

In some embodiments, the first main body portion further includes a first separator, the first main body portion is formed by co-winding a first positive electrode tab, a first negative electrode tab and the first separator, and the first direction is parallel to a winding center line of the first main body portion; and/or the second main body part further comprises a second diaphragm, the second main body part is formed by winding a second positive plate, a second negative plate and the second diaphragm together, and the first direction is parallel to the winding center line of the second main body part.

In some embodiments, the housing is made of a metallic material. Therefore, a structure in which metal is directly contacted with metal can be formed between the first positive plate and the shell and between the second positive plate and the shell, the heat dissipation efficiency is effectively improved, and the temperature of the battery is reduced.

In a second aspect, the present application provides a battery including the battery cell described above.

In a third aspect, the present application provides an electrical device comprising the above battery for supplying electrical energy to the electrical device.

In a fourth aspect, the present application provides a battery cell manufacturing apparatus, comprising:

the device comprises a providing device and a control device, wherein the providing device is configured to provide a shell, a first main body part and a second main body part, the first main body part comprises a first positive pole piece and a first negative pole piece, and the second main body part comprises a second positive pole piece and a second negative pole piece; and

the placing device is configured to arrange the first main body part and the second main body part in the shell, the first main body part and the second main body part are arranged at intervals along the first direction, one end, far away from the second main body part, of the first positive pole piece is in contact with the first inner surface of the shell, and one end, far away from the second main body part, of the first negative pole piece is insulated from the first inner surface of the shell; and/or one end of the second positive plate, which is far away from the first main body part along the first direction, is in contact with the second inner surface of the shell, one end of the second negative plate, which is far away from the first main body part along the first direction, is insulated from the second inner surface of the shell, and the first inner surface and the second inner surface are oppositely arranged.

The battery and consumer that this application provided all include the battery monomer that this application embodiment provided, consequently battery and consumer all have the advantage that the heat dissipation is fast and the temperature is low, are favorable to improving security performance and increase of service life. The manufacturing device of the battery cell provided by the application also has the advantages, and the description is omitted.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed 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 a person skilled in the art to obtain other drawings based on the drawings without any creative effort.

Fig. 1 is a schematic structural diagram of an electrical device disclosed in some embodiments of the present application.

Fig. 2 is a schematic diagram of a cell structure disclosed in some embodiments of the present application.

Fig. 3 is a perspective view of a battery cell disclosed in some embodiments of the present application.

Fig. 4 is a front view of a battery cell disclosed in some embodiments of the present application.

Fig. 5 is a top view of a battery cell as disclosed in some embodiments herein.

Fig. 6 is a left side view of a battery cell disclosed in some embodiments of the present application.

FIG. 7 is a cross-sectional view taken along section A-A of FIG. 4 in some embodiments of the present application.

FIG. 8 is an enlarged view of the portion of FIG. 7 labeled P1 according to some embodiments of the present application.

FIG. 9 is an enlarged view of the portion of FIG. 7 labeled P2 according to some embodiments of the present application.

FIG. 10 is an enlarged view of the portion of FIG. 7 labeled P3 according to some embodiments of the present application.

FIG. 11 is a cross-sectional view taken along section B-B of FIG. 4 in some embodiments of the present application.

Fig. 12 is a front view of a bracket in a battery cell disclosed in some embodiments of the present application.

Fig. 13 is a top view of a bracket in a battery cell as disclosed in some embodiments of the present application.

Fig. 14 is a left side view of a bracket in a battery cell disclosed in some embodiments of the present application.

FIG. 15 is a cross-sectional view taken along section C-C of FIG. 5 in some embodiments of the present application.

FIG. 16 is an enlarged view of the portion of FIG. 15 labeled P4 according to some embodiments of the present application.

Fig. 17 is a schematic view of a connection structure of the negative pole post and the second interposer in some embodiments of the present application.

FIG. 18 is a cross-sectional view taken along section C-C of FIG. 5 in still other embodiments of the present application.

FIG. 19 is an enlarged view of the portion labeled P5 in FIG. 18 of some embodiments of the present application.

Fig. 20 is a schematic view of a connection structure of the negative pole post and the second interposer in other embodiments of the present application.

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

Description of the labeling:

1000. a vehicle; 100. a battery; 200. a controller; 300. a motor; 101. a first cover body; 102. a second cover body; 10a, a housing; 20. a battery cell; 1. a housing; 1a, a first end cover; 1b, a second end cover; 2. a first electrode assembly; 21. a first main body portion; 211. a first positive plate; 211a, a first current collector; 211b, a first active material layer; 212. a first negative plate; 212a, a third current collector; 212b, a third active material layer; 22. a first positive tab; 23. a first negative electrode tab; 3. a second electrode assembly; 31. a second main body portion; 311. a second positive plate; 311a, a second current collector; 311b, a second active material layer; 312. a second negative plate; 312a, a fourth current collector; 312b, a fourth active material layer; 32. a second positive tab; 33. a second negative tab; 4. a support; 41. a first support section; 42. a second support portion; 43. a third support portion; 5. a first transfer tab; 51. a first connection portion; 52. a second connecting portion; 6. a second patch; 61. a third connecting portion; 62. a fourth connecting portion; 7a, a first sleeve; 7. a positive post; 71. a first inner pole; 72. a first outer pole; 8a, a second sleeve; 8. a negative pole post; 81. a second inner pole; 82. a second outer pole; 9. a first insulating member; 10. a second insulating member.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. Further, the term "vertical" is not strictly vertical, but is within an error allowance. "parallel" is not strictly parallel but within the tolerance of the error.

Reference herein 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 application. 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 embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more unless specifically defined otherwise. Similarly, "a plurality of sets" refers to two or more sets, and "a plurality" refers to two or more pieces, unless otherwise specifically limited.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning a fixed connection, a detachable connection, or an integral connection; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The inventor of the present application has noticed that, during the use of the battery during charging and discharging, some heat is generated inside the battery, and when the heat is accumulated to a large extent, the moisture of the electrolyte is evaporated and gradually dried up, and then the charging efficiency is reduced, the electrode plates are deformed, the internal resistance is increased, the oxidation of mechanical components is accelerated, the electrode plates or the separators are burned out, and finally, the capacity and the service life of the battery are reduced.

In order to overcome a series of adverse effects caused by battery heating, some active cooling measures are adopted in the related art. For example, a liquid cooling system is arranged in the battery, and the battery is cooled and cooled by liquid in the liquid cooling system. However, in this cooling method, a special liquid cooling system needs to be arranged inside the battery, and a layout space is provided for the liquid cooling system inside the battery, so that the size of the battery is increased, and the number of the batteries that can be stored in the limited placement space of the electric equipment is reduced, thereby reducing the electric energy provided by the battery system and affecting the user experience.

The inventor further researches and discovers that the heat transfer efficiency of two objects in direct contact is much higher than that of the two objects in indirect contact, so that the heat dissipation capacity of the battery cell can be improved by trying to directly contact the battery cell with the shell, and compared with a cooling mode of arranging a liquid cooling system in the battery, the cooling mode can greatly reduce the volume of the battery, is beneficial to increasing the total quantity of the battery in a limited space, and further improves the total capacity and the power performance of the battery system.

In order to increase the area of the direct contact between the battery cell and the casing, the inventor researches the current structure of the battery cell, and finds that, at present, the structure of the battery cell is generally that a positive pole column and a negative pole column are arranged on the same top cover, and meanwhile, the extending directions of the positive pole column and the negative pole column are the same as the extending directions of the battery cell pole lugs inside the battery cell, and the structure limits the connection mode between the positive pole and the negative pole of the battery cell to be connection at the same side of the battery cell, for example, the positive pole and the negative pole of the battery cell are all connected at the top of the battery cell, so that only the bottom of the whole battery cell can be in contact with the casing outside the battery cell, and the heat dissipation capacity of the battery cell is poor.

Based on above research, the inventor thinks can increase electric core and casing direct contact's area through the mode that changes battery monomer structure, and then help electric core dispel the heat fast, effectively reduces the inside heat that gathers of electric core, avoids electric core to age with higher speed, avoids thermal accumulation to lead to electric core thermal runaway under the extreme condition, effectively improves battery life.

To this end, the inventors provide a battery cell with an improved structure. In the single embodiment of battery that this application provided, the top and the bottom of electricity core all can with casing direct contact to effectively improve heat transfer efficiency, improve the heat-sinking capability of electricity core, prevent that the heat from gathering in the battery monomer is inside, influence the life-span of battery.

The battery cell disclosed in the embodiment of the application can be used in electric equipment such as vehicles, ships or aircrafts, but not limited thereto. The power supply system who possesses this consumer of constitution such as battery monomer, battery that this application is disclosed can be used, like this, is favorable to accelerating the heat-sinking capability of electric core, prevents that the battery temperature is too high, effectively improves battery life.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the battery is configured to provide electric energy for the electric device. The electric equipment may be, but is not limited to, a mobile phone, a portable device, a notebook computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric power tool, and the like, for example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, and the like, the electric toy includes a stationary or mobile electric toy, for example, a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, the electric power tool includes a metal cutting electric tool, an abrasive electric tool, an assembly electric tool, and an electric tool for railways, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer.

For convenience of description, the following embodiments are described by taking an electric device of some embodiments of the present application as an example of a vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the battery 100 being used to provide electrical energy for operation of the motor 300 and other components of the vehicle, the controller 200 being used to control operation of the motor 300, for example, for operational power requirements during start-up, navigation and travel of the vehicle 1000.

In some embodiments of the present application, the battery 100 may be used not only as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure. The battery 100 includes a case 10a and a battery cell 20, and the battery cell 20 is accommodated in the case 10 a. The housing 10a is used to provide a receiving space for the battery cell 20, and the housing 10a may have various structures. In some embodiments, the housing 10a may include a first cover 101 and a second cover 102, the first cover 101 and the second cover 102 cover each other, and the first cover 101 and the second cover 102 together define a receiving space for receiving the battery cell 20. The second cover 102 may be a hollow structure with an opening at one end, the first cover 101 may be a plate-shaped structure, and the first cover 101 covers the opening side of the second cover 102, so that the first cover 101 and the second cover 102 define an accommodating space together; the first cover 101 and the second cover 102 may both have a hollow structure with one side open, and the open side of the first cover 101 covers the open side of the second cover 102. Of course, the housing 10a formed by the first cover 101 and the second cover 102 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 100, the number of the battery cells 20 may be multiple, and the multiple battery cells 20 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the multiple battery cells 20. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery cells 20 is accommodated in the shell 10 a; of course, the battery 100 may also be formed by connecting a plurality of battery cells 20 in series, in parallel, or in series-parallel to form a battery module, and then connecting a plurality of battery modules in series, in parallel, or in series-parallel to form a whole, and the whole is accommodated in the housing 10 a. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 20.

Here, the battery cell 20 refers to the smallest unit constituting the battery. The battery cell 20 includes 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, or the like, which is not limited in the embodiment of the present disclosure. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc., which is not limited in the embodiments of the present disclosure. The battery cells are generally divided into three types in an encapsulation manner: the battery pack comprises a cylindrical battery monomer, a square battery monomer and a soft package battery monomer, and the embodiment of the disclosure is not limited to the above.

Referring to fig. 3 to 6, a perspective view, a front view, a top view and a left side view of a battery cell 20 according to some embodiments of the present disclosure are respectively shown. In some embodiments provided herein, the battery cell 20 includes a case 1 and an electrode assembly disposed inside the case 1.

The case 1 is a member for providing a receiving space to receive an electrode assembly, an electrolyte, and other components therein. The housing 1 includes a containing body having an opening and an end cap for closing the opening. The receiving body and the end cap may be separate components, and an opening is formed in the receiving body, and the opening is covered by the end cap at the opening to form an internal environment of the battery cell 20. The end cover and the containing body can be integrated without limitation, specifically, the end cover and the containing body can form a common connecting surface before other components are installed in the shell, and when the inside of the containing body needs to be packaged, the containing body is covered by the end cover, and the containing body and the end cover are packaged into a whole.

The receiving body is an assembly for cooperating with an end cap to form an internal environment of the battery cell 20, and the end cap is a member covering the opening of the receiving body to insulate the internal environment of the battery cell 20 from an external environment. Without limitation, the shape of the end cap may be adapted to the shape of the containment body to mate with the containment body. Optionally, the end cap may be made of a material having a certain hardness and strength, so that the end cap is not easily deformed when being extruded and expanded, and the battery cell 20 may have a higher structural strength and an improved safety performance.

In some embodiments, a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value may be further disposed on the end cap.

The housing 1 may be of various shapes and various sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, and the like. Specifically, the shape of the case 1 may be determined according to the specific shape and size of the electrode assembly. The material of the housing 1 may be selected from metal materials such as copper, iron, aluminum, stainless steel, and aluminum alloy, or non-metal materials such as plastic.

The electrode assembly is a part in which electrochemical reactions occur in the battery cell 20. In some embodiments provided herein, the electrode assembly includes a first electrode assembly 2 and a second electrode assembly 3, the first electrode assembly 2 includes a first main body portion 21, the first main body portion 21 is disposed in the case 1, the first main body portion 21 includes a first positive electrode tab 211 and a first negative electrode tab 212, the second electrode assembly includes a second main body portion 31, the second main body portion 31 is disposed in the case 1, and the second main body portion 31 includes a second positive electrode tab 311 and a second negative electrode tab 312.

Referring to fig. 7 to 9, the first main body portion 21 and the second main body portion 31 are arranged at an interval in the first direction, one end of the first positive electrode tab 211, which is far away from the second main body portion 31 in the first direction, protrudes out of the first main body portion 21 and contacts with the first inner surface of the housing 1, and the first negative electrode tab 212 is insulated from the first inner surface of the housing 1; and/or one end of the second positive electrode tab 311, which is far away from the first main body 21 along the first direction, protrudes out of the second main body 31 and contacts with the second inner surface of the casing 1, the second negative electrode tab 312 is insulated from the second inner surface of the casing 1, and the first inner surface and the second inner surface are arranged oppositely.

In some embodiments of the battery cell provided by the present application, the electrode assembly includes a first main body portion 21 and a second main body portion 31 arranged at an interval along the first direction, one end of the first positive electrode tab 211 of the first main body portion 21, which is far away from the second main body portion 31 along the first direction, protrudes from the first main body portion 21 and directly contacts with the first inner surface of the casing 1, one end of the second positive electrode tab 311 of the second main body portion 31, which is far away from the first main body portion 21 along the first direction, protrudes from the second main body portion 31 and directly contacts with the second inner surface of the casing 1, that is, both ends of the electrode assembly can directly contact with the casing 1, so as to increase the area of the whole cell formed by the first electrode assembly 2 and the second electrode assembly 3 directly contacting with the casing 1, so that heat generated inside the battery cell can be more quickly dissipated through the direct contact with the casing 1, thereby improving the heat dissipation capability of the cell, the heat is prevented from accumulating in the shell 1 to cause the temperature of the battery to be overhigh, and the service life of the battery is effectively prolonged.

In the embodiment shown in fig. 7, the up-down direction indicated by the arrow in fig. 7 is the first direction, and the first electrode assembly 2 is disposed above the second electrode assembly 3. As shown in fig. 8, the first electrode assembly 2 includes a first main body part 21, the length of the first positive electrode tab 211 in the first main body part 21 is longer than the length of the first negative electrode tab 212, and the upper end of the first positive electrode tab 211 protrudes from the top of the first main body part 21 such that the upper end of the first positive electrode tab 211 is in direct contact with the upper inner surface of the case 1. As shown in fig. 9, the length of the second positive electrode tab 311 in the second main body 31 is longer than that of the second negative electrode tab 312, and the lower end of the second positive electrode tab 311 protrudes from the top of the second main body 31, so that the lower end of the second positive electrode tab 311 is in direct contact with the inner surface of the bottom of the case 1, and therefore, the heat transfer efficiency between the first positive electrode tab 211 and the case 1 and between the second positive electrode tab 311 and the case 1 is high, and heat generated inside the electrode assembly can be dissipated in time, thereby reducing the temperature of the battery cell, and improving the service life and safety of the battery cell.

In some embodiments, the first positive electrode tab 211 includes a first current collector 211a and a first active material layer 211b formed on the first current collector 211a, and one end of the first current collector 211a, which is away from the second body portion 31 in the first direction, protrudes out of the first active material layer 211b and is in contact with the first inner surface of the case 1; the second positive electrode tab 311 includes a second collector 311a and a second active material layer 311b formed on the second collector 311a, and one end of the second collector 311a, which is away from the first body portion 21 in the first direction, protrudes from the second active material layer 311b and contacts the second inner surface of the case 1.

The first current collector 211a collects the current generated from the first active material layer 211b to form a large current to be output to the outside. The first current collector 211a is a part which is relatively easy to generate heat and is used as a carrier for collecting current, so that the first current collector 211a is selected to extend out relative to the first main body part 21 in a direction close to the shell 1, so that the first current collector 211a is in direct contact with the shell 1, the heat transfer efficiency can be effectively improved, and the temperature of the battery cell 20 can be rapidly reduced. Moreover, in order to realize the conductive performance, the first current collector 211a is usually made of a metal foil, such as an aluminum foil, and when the casing 1 is made of a metal material, the metal can be in direct contact with the metal, so that the heat transfer efficiency is further improved.

The second current collector 311a collects the current generated from the second active material layer 311b to form a larger current to be output to the outside. The second current collector 311a is a part that is relatively easy to generate heat as a carrier for collecting current, so that the second current collector 311a is selected to extend out in a direction close to the case 1 relative to the second main body 31, so that the second current collector 311a is in direct contact with the case 1, the heat transfer efficiency can be effectively improved, and the temperature of the battery cell 20 can be rapidly reduced. Moreover, in order to realize the conductive performance, the second current collector 311a is usually made of a metal foil, such as an aluminum foil, and when the casing 1 is made of a metal material, the metal can be directly contacted with the metal, so that the heat transfer efficiency is further improved.

As shown in fig. 8, the top of the first current collector 211a is slightly longer than the top of the first active material layer 211b, the top of the first current collector 211a includes a portion not covering the first active material layer 211b, and an end of the portion is in direct contact with the inner surface of the case 1, so that heat generated by the first current collector 211a in the process of transmitting current is dissipated out of the case 1 in time through the heat transfer function of the case 1, and the problem that the temperature of the battery cell 20 is too high, which affects the service life and the use safety of the battery cell 20 is avoided. The first negative electrode tab 212 includes a third current collector 212a and a third active material layer 212b formed on the third current collector 212a, and the top of the third current collector 212a may be flush with the third active material layer 212b or the top of the third current collector 212a may be slightly longer than the third active material layer 212b, but both the third current collector 212a and the third active material layer 212b remain insulated from the case 1.

As shown in fig. 9, the top of the second current collector 311a is slightly longer than the top of the second active material layer 311b, the top of the second current collector 311a includes a portion not covering the second active material layer 311b, and an end of the portion is in direct contact with the inner surface of the case 1, so that heat generated by the second current collector 311a in the process of transmitting current is dissipated out of the case 1 in time through the heat transfer function of the case 1, and the problem that the temperature of the battery cell 20 is too high, which affects the service life and the safety of the battery cell 20 is avoided. The second negative electrode tab 312 includes a fourth current collector 312a and a fourth active material layer 312b formed on the fourth current collector 312a, and the top of the fourth current collector 312a may be flush with the fourth active material layer 312b or the top of the fourth current collector 312a may be slightly longer than the fourth active material layer 312b, but both the fourth current collector 312a and the fourth active material layer 312b remain insulated from the case 1.

In some embodiments, a first preset distance is provided between one end of the first negative electrode tab 212 away from the second main body 31 in the first direction and the first inner surface of the casing 1, and a second preset distance is provided between one end of the second negative electrode tab 312 away from the first main body 21 in the first direction and the second inner surface of the casing 1. Therefore, insulation can be kept between the first negative plate 212 and the casing 1 and between the second negative plate 312 and the casing 1, and the first positive plate 211 and the first negative plate 212 are prevented from being electrically conducted due to the contact between the first positive plate 211 and the casing 1, or the second positive plate 311 and the second negative plate 312 are prevented from being electrically conducted due to the contact between the second positive plate 311 and the casing 1, so that a circuit short circuit is prevented, the safety of the battery cell 20 is further reduced, and the functional failure of the battery is possibly caused.

In other embodiments, in order to maintain insulation between the first negative electrode sheet 212 and the casing 1 and between the second negative electrode sheet 312 and the casing 1, other insulation methods may be adopted, such as providing an insulating member between the first negative electrode sheet 212 and the casing 1 to electrically isolate the first negative electrode sheet 212 from the casing 1; alternatively, an insulating member is disposed between the second negative electrode tab 312 and the case 1 to electrically isolate the second negative electrode tab 312 from the case 1.

In some embodiments, the first electrode assembly 2 further includes a first positive tab 22 and a first negative tab 23 extending from the first main body 21, the second electrode assembly 3 further includes a second positive tab 32 and a second negative tab 33 extending from the second main body 31, the first positive tab 22 is connected to the first positive tab 211, the first negative tab 23 is connected to the first negative tab 212, the second positive tab 32 is connected to the second positive tab 311, the second negative tab 33 is connected to the second negative tab 312, the first positive tab 22 and the first negative tab 23 are disposed at an end of the first main body 21 near the second main body 31 in the first direction, and the second positive tab 32 and the second negative tab 33 are disposed at an end of the second main body 31 near the first main body 21 in the first direction.

In some of the above embodiments, the first positive tab 22, the first negative tab 23, the second positive tab 32 and the second negative tab 33 are all located between the first main body portion 21 and the second main body portion 31, so that the first positive tab 22 and the first negative tab 23 are both disposed at one end of the first main body portion 21 away from the housing 1 in the first direction, and direct contact between one end of the first positive tab 211 away from the second main body portion 31 in the first direction and the first inner surface of the housing 1 is prevented from being affected due to the presence of the first positive tab 22 and the first negative tab 23; and the second positive tab 32 and the second negative tab 33 are both disposed at one end of the second main body portion 31 away from the housing 1 in the first direction, so as to prevent direct contact between one end of the second positive tab 311 away from the first main body portion 21 in the first direction and the second inner surface of the housing 1 from being affected by the presence of the second positive tab 32 and the second negative tab 33.

The first positive tab 22, the first negative tab 23, the second positive tab 32 and the second negative tab 33 are all disposed in the space between the first main body portion 21 and the second main body portion 31, which is beneficial to increasing the direct contact area between the electrode assembly and the case 1 and enhancing the heat transfer effect between the electrode assembly and the case 1. Moreover, the distance between the first positive tab 22 and the second positive tab 32 and the distance between the first negative tab 23 and the second negative tab 33 can be shortened, the current transmission path can be shortened, the energy consumption can be reduced, the generation of heat can be reduced, and the influence on the service life and the use safety caused by the overhigh temperature of the battery cell 20 can be prevented.

As shown in fig. 10 and 11, the first positive tab 22 and the first negative tab 23 respectively extend downward from the bottom of the first body 21, the second positive tab 32 and the second negative tab 33 respectively extend upward from the top of the second body 31, the first positive tab 22, the first negative tab 23, the second positive tab 32 and the second negative tab 33 are all located in the gap between the first body 21 and the second body 31, this arrangement enables direct contact between the first positive electrode tab 211 and the case 1 and between the second positive electrode tab 311 and the case 1 to be achieved at the top of the first main body portion 21 and the bottom of the second main body portion 31, enhancing the heat exchange effect, and the distance between the first positive tab 22 and the second positive tab 32 and the distance between the first negative tab 23 and the second negative tab 33 are shorter, which is beneficial to reducing the generation of heat and fundamentally reducing the temperature of the battery cell 20.

In some embodiments, one end of the part of the first positive electrode tab 211 in the first main body 21 close to the second main body 31 in the first direction protrudes out of the first main body 21 so as to extend to form the first positive electrode tab 22, and one end of the part of the first negative electrode tab 212 in the first main body 21 close to the second main body 31 in the first direction protrudes out of the first main body 21 so as to extend to form the first negative electrode tab 23; one end of the part of the second positive electrode tab 311 in the second main body 31, which is close to the first main body 21 in the first direction, protrudes out of the second main body 31 so as to extend to form the second positive electrode tab 32, and one end of the part of the second negative electrode tab 312 in the second main body 31, which is close to the first main body 21 in the first direction, protrudes out of the second main body 31 so as to extend to form the second negative electrode tab 33.

As shown in fig. 10 and 11, the first positive tab 22 extends from the first main body 21 in a direction close to the second main body 31, and then extends laterally in a direction perpendicular to the first direction to form a U-shaped structure having an opening. The second positive tab 32 extends from the second body 31 in a direction close to the first body 21, and then extends laterally in a direction perpendicular to the first direction to form a U-shaped structure having an opening. The first and second negative electrode tabs 23 and 33 may be formed in a similar manner to the first and second positive electrode tabs 22 and 32, and will not be described in detail herein.

In some embodiments, the battery cell 20 further includes a bracket 4, and the bracket 4 is disposed between the first main body portion 21 and the second main body portion 31 to maintain the first positive electrode tab 211 in contact with the first inner surface of the case 1 and maintain the second positive electrode tab 311 in contact with the second inner surface of the case 1.

Through setting up support 4, can play the supporting role to first main part 21 and second main part 31, make first positive plate 211 and the first internal surface of casing 1 keep in contact, and make the second positive plate 311 and the second internal surface of casing 1 keep in contact, prevent to cause first positive plate 211 to keep away from the first internal surface of casing 1 or the second internal surface that casing 1 was kept away from to second positive plate 311 because of self gravity or external force scheduling problem, thereby influence heat transfer efficiency, reduce the radiating rate, cause the battery monomer high temperature.

For example, in an application scenario in which the first main body portion 21 and the second main body portion 31 are arranged above each other, the bracket 4 may support the first main body portion 21 located above, so as to prevent the second main body portion 31 from being squeezed by the gravity of the first main body portion 21 and causing a squeezing injury to the second main body portion 31; moreover, the bracket 4 can also prevent the first positive plate 211 in the upper first main body part 21 from being away from the casing 1 and being unable to keep contact with the first inner surface of the casing 1 by supporting the first main body part 21, which affects the heat transfer effect, and further reduces the heat dissipation speed of the first electrode assembly 2, which causes the temperature of the battery cell 20 to be too high, and affects the service life and the use safety of the battery cell.

In some embodiments, the first body part 21 includes a first separator for keeping the first positive electrode tab 211 and the first negative electrode tab 212 insulated, the second body part 31 includes a second separator for keeping the second positive electrode tab 311 and the second negative electrode tab 312 insulated, and the holder 4 is supported between the first separator and the second separator. The advantage of setting up like this is, avoids support 4 to cause the extrusion injury to first positive plate 211, first negative pole piece 212, the positive plate 311 of second and second negative pole piece 312, is favorable to protecting first positive plate 211, first negative pole piece 212, the positive plate 311 of second and second negative pole piece 312, improves the life-span of pole piece.

In order to enable the holder 4 to be supported between the first separator and the second separator, an end of the first separator adjacent to the second body portion 31 in the first direction may protrude from the first body portion 21 so that the end of the first separator adjacent to the second body portion 31 in the first direction is longer than the first positive electrode tab 211 and the first negative electrode tab 212, so that the first separator can be in contact with the holder 4, and the support of the first separator by the holder 4 is maintained, thereby protecting the first positive electrode tab 211 and the first negative electrode tab 212 from being pressed; an end of the second separator adjacent to the first body portion 21 in the first direction may protrude from the second body portion 31 so that the end of the second separator adjacent to the first body portion 21 in the first direction is longer than the second positive electrode tab 311 and the second negative electrode tab 312, so that the second separator can contact the holder 4, and the support of the holder 4 to the second separator is maintained, thereby protecting the second positive electrode tab 311 and the second negative electrode tab 312 from being pressed.

In order to form the first positive tab 22, one end of a part of the first positive tab 211, which is close to the second main body 31 in the first direction, needs to protrude from the first main body 21, that is, one end of the first positive tab 211, which is close to the second main body 31 in the first direction, needs to be longer than the first negative tab 212 and the first separator; when the first negative electrode tab 23 is formed, one end of a part of the first negative electrode sheet 212, which is close to the second main body 31 in the first direction, needs to protrude from the first main body 21, that is, one end of the first negative electrode sheet 212, which is close to the second main body 31 in the first direction, needs to be longer than the first positive electrode sheet 211 and the first separator; in order to support the holder 4 on the first separator, the end of the first separator closer to the second main body 31 in the first direction needs to protrude from the first main body 21, that is, the end of the first separator closer to the second main body 31 in the first direction needs to be longer than the first positive electrode tab 211 and the first negative electrode tab 212. The three arrangements may be mistakenly interpreted as contradictory, but are not contradictory because the end surface of the first main body 21 close to the second main body 31 has a predetermined area, and the corresponding arrangement can be completed in a predetermined area both when the first positive tab 22 and the first negative tab 23 are formed and when the bracket 4 is supported on the first separator, without setting the whole end surface of the first main body 21 close to the second main body 31 to the same structure, so that the corresponding purpose can be achieved by the regional arrangement.

Similarly, when forming the second positive tab 32, it is necessary to make one end of the partial second positive tab 311 close to the first main body 21 along the first direction protrude from the second main body 31, that is, one end of the second positive tab 311 close to the first main body 21 along the first direction is longer than the second negative tab 312 and the first separator; when forming the second negative electrode tab 33, one end of a part of the second negative electrode sheet 312, which is close to the first main body 21 in the first direction, needs to protrude from the second main body 31, that is, one end of the second negative electrode sheet 312, which is close to the first main body 21 in the first direction, is longer than the second positive electrode sheet 311 and the first separator; in order to support the holder 4 on the second separator, the end of the second separator closer to the first main body 21 in the first direction needs to protrude from the second main body 31, that is, the end of the second separator closer to the first main body 21 in the first direction needs to be longer than the second positive electrode tab 311 and the second negative electrode tab 312. The three arrangements may be mistakenly interpreted as contradictory, but are not contradictory because the end surface of the second main body 31 close to the first main body 21 has a predetermined area, and the corresponding arrangement can be completed in a predetermined area both when forming the second positive tab 32 and the second negative tab 33 and when enabling the support 4 to be supported on the second separator, without setting the entire end surface of the second main body 31 close to the first main body 21 to the same structure, so that the corresponding purpose can be achieved by the regional arrangement.

In some embodiments, the bracket 4 includes a first support portion 41, a second support portion 42, and a third support portion 43 connected between the first support portion 41 and the second support portion 42, the first support portion 41 being supported between the first body portion 21 and the first positive tab 22 and between the first body portion 21 and the first negative tab 23, the second support portion 42 being supported between the second body portion 31 and the second positive tab 32 and between the second body portion 31 and the second negative tab 33. The support 4 having such a structure is advantageous in that it can effectively support the first electrode assembly 2 and the second electrode assembly 3 regardless of which of the first electrode assembly 2 and the second electrode assembly 3 is located above when the battery cell 20 is in an operating state, and is convenient to install and operate.

As shown in fig. 12 to 14, the side of the support 4 is U-shaped, and this structure can support the first electrode assembly 2 and the second electrode assembly 3 by the first support part 41 and the second support part 42, respectively. The first support portion 41 can be inserted into the openings formed by bending the first positive tab 22 and the first negative tab 23, respectively, and the second support portion 42 can be inserted into the openings formed by bending the second positive tab 32 and the second negative tab 33, respectively.

In some embodiments, the battery cell 20 further includes a first connection tab 5, a second connection tab 6, a positive post 7, and a negative post 8, the first positive tab 22 and the second positive tab 32 are both connected to the first connection tab 5, the first connection tab 5 is connected to the positive post 7, the first negative tab 23 and the second negative tab 33 are both connected to the second connection tab 6, and the second connection tab 6 is connected to the negative post 8.

In some of the above embodiments, the first positive tab 22 and the second positive tab 32 are both connected to the first interposer 5, and the first negative tab 23 and the second negative tab 33 are both connected to the second interposer 6, so that the first electrode assembly 2 and the second electrode assembly 3 realize a common interposer, the number of components of the battery cell 20 can be reduced, and the cost can be saved; meanwhile, the shared adapter plate can also simplify the structural arrangement inside the battery cell 20, save space and reduce the volume of the battery cell 20.

As shown in fig. 10 and 11, first positive tab 22 may be disposed opposite second positive tab 32, and first negative tab 23 may be disposed opposite second negative tab 33, so as to dispose first interposer 5 connected to first positive tab 22 and second positive tab 32, and second interposer 6 connected to first negative tab 23 and second negative tab 33.

In some embodiments, the positive post 7 is mounted to a first side of the housing 1, the negative post 8 is mounted to a second side of the housing 1, the first side is disposed opposite the second side, and both the first side and the second side are parallel to the first direction.

The positive pole post 7 and the negative pole post 8 are respectively arranged on two sides of the shell 1 relative to the first direction, so that the first positive pole lug 22 and the second positive pole lug 32 between the first main body part 21 and the second main body part 31 are connected with the positive pole post 7 through transverse extension, and the first negative pole lug 23 and the second negative pole lug 33 between the first main body part 21 and the second main body part 31 are connected with the negative pole post 8 through transverse extension, therefore, the lengths of the first switching piece 5 and the second switching piece 6 are shorter, and by shortening the lengths of the first switching piece 5 and the second switching piece 6, the circuit loss can be reduced, and the heat generation is reduced.

In some embodiments, the battery cell comprises a first end cap 1a and a second end cap 1b, the first side of the housing 1 is provided with a first opening, the second side of the housing 2 is provided with a second opening, the first end cap 1a is used for sealing the first opening, and the second end cap 1b is used for sealing the second opening. The positive post 7 is attached to the first end cap 1a and the negative post 8 is attached to the second end cap 1 b.

As shown in fig. 15 and 16 and fig. 18 and 19, the positive post 7 includes a first inner post 71 and a first outer post 72, the first sleeve 7a is mounted on the first end cap 1a, the first outer post 72 is disposed on the outer side of the first end cap 1a and connected to the first sleeve 7a, the first rotating plate 5 is connected to a first end of the first inner post 71, and a second end of the first inner post 71 passes through the first sleeve 7a and is connected to the first sleeve 7a on the outer side of the housing 1. Compared with the inner side, the outer side operation space of the casing 1 is larger, so that the first inner pole 71 and the first sleeve 7a are fixed and connected outside the casing 1, the operation is more convenient, and the assembly efficiency is improved.

Through setting up anodal post 7 and the first sleeve 7a including first interior utmost point post 71 and first external polar post 72, and install first sleeve 7a on first end cover 1a, when assembling the battery monomer, can be connected first commentaries on classics tab 5 with the first end of first interior utmost point post 71 earlier, then pack electrode subassembly into the inside of casing 1, then make the second end of first interior utmost point post 71 wear out outside casing 1 through first sleeve 7a when the encapsulation first end cover 1a, be connected first interior utmost point post 71 with first sleeve 7a in the outside of casing 1 after fixed first end cover 1a, make first interior utmost point post 71 link together through first sleeve 7a with first external polar post 72, form anodal post 7.

The first sleeve 7a comprises a first sleeve part and a first limiting part, the first end cover 1a is provided with a first through hole, the first sleeve part is inserted into the first through hole, the first limiting part is connected with the first sleeve part, the first limiting part is located on the inner side of the first end cover 1a, and the size of the first limiting part is larger than that of the first through hole so as to limit the first sleeve part and prevent the first sleeve part from being separated from the first through hole.

The center of the first sleeve 7a is provided with a through second through hole, the first inner pole 71 comprises a first column part and a second limiting part, the first column part is inserted into the second through hole, the second limiting part is connected with the first column part, the second limiting part is positioned on the inner side of the first sleeve 7a, the size of the second limiting part is larger than that of the second through hole, and the second limiting part is in contact with the first limiting part to limit the first column part and prevent the first column part from being separated from the second through hole. The first external pole 72 is electrically connected to the positive electrode of the electric component.

The negative electrode tab 8 and the second end cap 1b may be connected in the same manner as the positive electrode tab 7 and the first end cap 1a, or may be connected in a different manner. For example, the second sleeve 8a may be provided between the negative electrode tab 8 and the second end cap 1b, or the second sleeve 8a may not be provided.

In the embodiment shown in fig. 15 and 18, the second sleeve 8a is not provided between the negative post 8 and the second end cap 1 b. The negative pole column 8 comprises a second inner pole column 81 and a second outer pole column 82, the second outer pole column 82 is arranged on the outer side of the second end cover 1b, the first end of the second inner pole column 81 is located on the inner side of the second end cover 1b and connected with the second adapter sheet 6, and the second end of the second inner pole column 81 penetrates through the second end cover 1b and is connected with the second outer pole column 82.

In the embodiment shown in fig. 17 and 20, a second sleeve 8a is provided between the negative post 8 and the second end cap 1 b. The negative pole 8 comprises a second inner pole 81 and a second outer pole 82, the second sleeve 8a is mounted on the second end cover 1b, the second outer pole 82 is arranged on the outer side of the second end cover 1b and connected with the second sleeve 8a, the second adapter sheet 6 is connected with the second end of the second inner pole 81, and the second end of the second inner pole 81 penetrates through the second sleeve 8a and is connected with the second sleeve 8a on the outer side of the shell 1. Compare in the inboard, the outside operating space of casing 1 is bigger, consequently realizes the fixed of second utmost point post 81 and second sleeve 8a and connects in the outside of casing 1, can make the operation more convenient, is favorable to improving the packaging efficiency.

Through setting up negative pole post 8 and the second sleeve 8a including second interior utmost point post 81 and second external utmost point post 82, and install second sleeve 8a on second end cover 1b, when the assembly battery is single, can be connected first end of second switching piece 6 and second interior utmost point post 81 earlier, then pack electrode subassembly into the inside of casing 1, then make the second end of second interior utmost point post 81 wear out outside casing 1 through second sleeve 8a when encapsulation second end cover 1b, be connected second interior utmost point post 81 and second sleeve 8a in the outside of casing 1 behind fixed second end cover 1b, make second interior utmost point post 81 link together through second sleeve 8a with second external utmost point post 82, form negative pole post 8.

The second sleeve 8a comprises a second sleeve part and a third limiting part, the second end cover 1b is provided with a third through hole, the second sleeve part is inserted into the third through hole, the third limiting part is connected with the second sleeve part, the third limiting part is located on the inner side of the second end cover 1b, and the size of the third limiting part is larger than that of the third through hole so as to limit the second sleeve part and prevent the second sleeve part from being separated from the third through hole.

The center of the second sleeve 8a is provided with a fourth through hole which penetrates through, the second inner pole 81 comprises a first cylinder part and a fourth limiting part, the first cylinder part is inserted into the fourth through hole, the fourth limiting part is connected with the first cylinder part, the fourth limiting part is positioned on the inner side of the second sleeve 8a, the size of the fourth limiting part is larger than that of the fourth through hole, the fourth limiting part is in contact with the third limiting part to limit the first cylinder part and prevent the first cylinder part from being separated from the fourth through hole. The second external pole 82 is used for electrically connecting with the positive electrode of the electric component.

In the embodiment shown in fig. 15 and 18, before the electrode assembly is assembled into the casing 1, the second inner terminal 81 and the second outer terminal 82 are mounted on the second end cap 1b, the second adaptor sheet 6 is connected to the first negative tab 23 and the second negative tab 33, the second adaptor sheet 6 is connected to the second inner terminal 81, the first adaptor sheet 5 is connected to the first positive tab 22 and the second positive tab 32, the first adaptor sheet 5 is connected to the first inner terminal 71, the second end cap 1b, the negative terminal 8, the second adaptor sheet 6, the electrode assembly, the first adaptor sheet 5 and the first inner terminal 71 are assembled into the casing 1, the first end cap 1a with the first outer terminal 72 and the first sleeve 7a mounted thereon is finally packaged on the second side surface of the casing 1, so that the second end of the first inner terminal 71 passes through the outer side of the casing 1, so that the first internal pole 71 and the first sleeve 7a are connected by welding on the outside of the housing 1, completing the assembly.

For the embodiment shown in fig. 17 and 20, the second sleeve 8a is disposed between the negative pole 8 and the second end cap 1b, and the first end cap 1a is assembled as described above, the first inner pole 71 is connected to the first adaptor piece 5, the second inner pole 81 is connected to the second adaptor piece 6, the first inner pole 71 and the second sleeve 7a are then connected after the first end cap 1a is packaged after the electrode assembly is installed in the casing 1, and the second end cap 1b is packaged before the second inner pole 81 and the second sleeve 8a are connected.

Various options are possible for the design of the first adapter plate 5 and the second adapter plate 6.

For example, in the embodiment shown in fig. 15 and 16, the first switching piece 5 includes a first connection portion 51 extending in a direction perpendicular to the first direction, the first connection portion 51 is connected to the first positive tab 22 and the second positive tab 32, and an end of the first connection portion 51 near the positive post 7 is connected to the positive post 7.

In the embodiment shown in fig. 18 and 19, the first switching piece 5 includes a first connection portion 51 extending in a direction perpendicular to the first direction and a second connection portion 52 extending in a direction parallel to the first direction, the first connection portion 51 and the second connection portion 52 are connected in an L shape, the first connection portion 51 is connected to the first positive tab 22 and the second positive tab 32, and the second connection portion 52 is connected to the positive post 7. This structure can enhance the connection stability of the first junction piece 5 with the positive post 7 by increasing the contact area of the second connection portion 52 with the positive post 7.

Similarly, in the embodiment shown in fig. 15 and 17, the second interposer 6 includes a third connection portion 61 extending in a direction perpendicular to the first direction, the third connection portion 61 is connected to the first negative tab 23 and the second negative tab 33, and an end of the third connection portion 61 near the negative post 8 is connected to the negative post 8.

In the embodiment shown in fig. 18 and 20, the second interposer 6 includes a third connection portion 61 extending in a direction perpendicular to the first direction and a fourth connection portion 62 extending in a direction parallel to the first direction, the third connection portion 61 and the fourth connection portion 62 are connected in an L shape, the third connection portion 61 is connected to the first negative tab 23 and the second negative tab 33, and the fourth connection portion 62 is connected to the negative post 8. This structure can enhance the connection stability of the second interposer 6 and the negative electrode tab 8 by increasing the contact area of the fourth connection portion 62 and the negative electrode tab 8.

In some embodiments, the battery cell 20 further includes a first insulator 9 disposed within the case 1, the first insulator 9 for electrically isolating the negative post 8 from the case 1.

In some embodiments of the present application, although insulation is maintained between the first negative electrode tab 212 in the first electrode assembly 2 and the case 1, insulation is also maintained between the second negative electrode tab 312 in the second electrode assembly 3 and the case 1, but one end of the first positive electrode tab 211 in the first electrode assembly 2 is in direct contact with the first inner surface of the case 1, one end of the second positive electrode tab 311 in the second electrode assembly 3 is in direct contact with the second inner surface of the case 1, and the first positive tab 22 in the first electrode assembly 2 and the second positive tab 32 in the second electrode assembly 3 are both connected with the positive post 7 through the first junction piece 5, by providing the first insulating member 9 capable of electrically isolating the negative post 8 from the case 1, therefore, the negative post 8 can be prevented from being electrically connected to the positive post 7 through the case 1, further, the short circuit may affect the safety of the battery cell, and may also cause the functional failure of the battery cell.

In the embodiment shown in fig. 15 or 17, the battery cell 20 further includes a second insulating member 10 disposed inside the case 1, and the second insulating member 10 serves to electrically isolate the positive post 7 from the case 1.

In view of the fact that one end of the first positive electrode tab 211 in the first electrode assembly 2 is in direct contact with the first inner surface of the case 1, one end of the second positive electrode tab 311 in the second electrode assembly 3 is in direct contact with the second inner surface of the case 1, and the first positive electrode tab 22 in the first electrode assembly 2 and the second positive electrode tab 32 in the second electrode assembly 3 are both connected with the positive post 7 through the first connecting piece 5, i.e., the electrical connection between the positive post 7 and the case 1 is achieved through the first connecting piece 5, the first positive electrode tab 22 and the first positive electrode tab 211, and the first connecting piece 5, the second positive electrode tab 32 and the second positive electrode tab 311, the second insulating member 10 can be omitted in other embodiments.

In some embodiments, the first body portion 21 further includes a first separator, the first body portion 21 is formed by winding the first positive electrode tab 211, the first negative electrode tab 212, and the first separator together, and the first direction is parallel to a winding center line of the first body portion 21; and/or the second main body 31 further includes a second separator, the second main body 31 is formed by winding the second positive electrode tab 311, the second negative electrode tab 312 and the second separator together, and the first direction is parallel to a winding center line of the second main body 31. In these embodiments, the first body portion 21 and the second body portion 31 are both of a roll-type structure, and when the roll-type structure is adopted, the first direction is a roll center line of the first body portion 21 and the second body portion 31.

In other embodiments, the first main body portion 21 and the second main body portion 31 may also be manufactured in a manner that the positive and negative electrode sheets and the separator are placed in a stack, and when such a laminated structure is employed, a direction in which the positive and negative electrode sheets may protrude from both ends may be selected as the first direction.

In some embodiments provided herein, the housing 1 is made of a metal material. The first positive plate 211 and the second positive plate 311 are both made of metal materials, so that direct contact between metal and metal can be achieved between the first positive plate 211 and the shell 1 and between the second positive plate 311 and the shell 1, heat transfer efficiency is greatly improved, and the temperature of a battery monomer is effectively reduced.

The application also provides a battery, which comprises the battery monomer.

The application also provides electric equipment which comprises the battery, and the battery is used for supplying electric energy to the electric equipment.

The application also provides a manufacturing device of the battery cell, which comprises a providing device and a placing device, wherein the providing device is configured to provide the shell 1, the first main body part 21 and the second main body part 31, the first main body part 21 comprises a first positive plate 211 and a first negative plate 212, and the second main body part 31 comprises a second positive plate 311 and a second negative plate 312; the placing device is configured to arrange the first main body part 21 and the second main body part 31 in the housing 1, the first main body part 21 and the second main body part 31 are arranged at intervals along the first direction, one end of the first positive plate 211, which is far away from the second main body part 31 along the first direction, is in contact with the first inner surface of the housing 1, and one end of the first negative plate 212, which is far away from the second main body part 31 along the first direction, is insulated from the first inner surface of the housing 1; and/or one end of the second positive electrode tab 311, which is far away from the first main body portion 21 in the first direction, is in contact with a second inner surface of the casing 1, one end of the second negative electrode tab 312, which is far away from the first main body portion 21 in the first direction, is insulated from the second inner surface of the casing 1, and the first inner surface and the second inner surface are arranged oppositely.

The positive effects of the embodiments of the single battery provided by the application are also applicable to batteries, electric equipment and manufacturing devices of the single battery, and are not described herein again.

The structure of some embodiments of the battery cell provided in the present application is described below with reference to fig. 3 to 17.

As shown in fig. 3 to 6, there are a perspective view, a front view, a top view, and a left side view of the battery cell 20, respectively. The battery cell 20 comprises a shell 1, the shell 1 comprises a containing body, a first end cover and a second end cover, a first opening is arranged on the left side of the containing body, a second opening is arranged on the right side of the containing body, the first end cover is used for sealing the first opening, the second end cover is used for sealing the second opening, a negative pole column 8 is installed on the first end cover, and a positive pole column 7 is installed on the second end cover.

As shown in fig. 7, the case 1 is provided inside with a first electrode assembly 2 and a second electrode assembly 3, the first direction is an up-down direction, and the first electrode assembly 2 is disposed above the second electrode assembly 3. The first electrode assembly 2 and the second electrode assembly 3 have the same structure and are arranged in up-down symmetry about a center line between the first electrode assembly 2 and the second electrode assembly 3.

The first electrode assembly 2 includes a first body portion 21, a first positive tab 22 and a first negative tab 23 extending downwardly from the first body portion 21. The second electrode assembly 3 includes a second body portion 31, a second positive tab 32 and a second negative tab 33 extending upwardly from the second body portion 31. The first positive tab 22 and the second positive tab 32 are oppositely arranged on one side of the casing 1 close to the second end cover. First negative tab 23 and second negative tab 33 are oppositely disposed on a side of case 1 near the first end cap.

In the embodiment shown in fig. 7, the first positive tab 22 and the second positive tab 32 are connected to the first rotating tab 5, respectively, and the first rotating tab 5 is connected to the positive post 7. The first negative tab 23 and the second negative tab 33 are respectively connected with the second adaptor sheet 6, and the second adaptor sheet 6 is connected with the negative pole post 8.

The first positive tab 22, the first negative tab 23, the second positive tab 32 and the second negative tab 33 are all disposed between the first main body portion 21 and the second main body portion 31, and the positive post 7 and the negative post 8 are disposed on the right side and the left side of the housing 1, respectively, so that the first adaptor piece 5 can be extended to the positive post 7 substantially horizontally, and the second adaptor piece 6 can be extended to the negative post 8 substantially horizontally, thereby effectively shortening the lengths of the first adaptor piece 5 and the second adaptor piece 6, reducing the heat generation amount and reducing the temperature of the battery cell 20.

The inside of the case 1 is also provided with a first insulating member 9 and a second insulating member 10, the first insulating member 9 electrically isolates the negative post 8 from the case 1, and the second insulating member 10 electrically isolates the positive post 7 from the case 1. In some embodiments, the second insulator 10 may be omitted. The first insulating member 9 and the second insulating member 10 may be made of a plastic material. Riveting connection can be adopted between the positive pole post 7 and the shell 1 and between the negative pole post 8 and the shell 1, and sealing rings can be arranged at the connection positions. The sealing ring may be of a fluoro-rubber material.

As shown in fig. 8, the first body part 21 includes a first positive electrode tab 211 and a first negative electrode tab 212, and the first positive electrode tab 211 includes a first current collector 211a and a first active material layer 211 b. On the top of the first main body part 21, the length of the first current collector 211a is longer than that of the first active material layer 211b, and the first current collector 211a is in close contact with the inner surface of the top of the casing 1, so that the heat transfer function between the first positive plate 211 and the casing 1 can be enhanced, the heat can be dissipated to the outside of the casing 1 in time, and the temperature of the battery cell 20 can be effectively reduced. The second active material layer 211b and the first negative electrode sheet 212 each have a predetermined distance from the top inner surface of the case 1. The length of the first negative electrode sheet 212 is longer than the length of the first active material layer 211 b.

As shown in fig. 9, the second body part 31 includes a second positive electrode tab 311 and a second negative electrode tab 312, and the second positive electrode tab 311 includes a second current collector 311a and a second active material layer 311 b. At the bottom of the second main body 31, the length of the second current collector 311a is longer than that of the second active material layer 311b, and the second current collector 311a is in close contact with the inner surface of the bottom of the case 1, so that the heat transfer function between the second positive plate 311 and the case 1 can be enhanced, the heat can be dissipated to the outside of the case 1 in time, and the temperature of the battery cell 20 can be effectively reduced. The second active material layer 311b and the second negative electrode sheet 312 each have a predetermined distance from the bottom inner surface of the case 1. The length of the second negative electrode sheet 312 is longer than the length of the second active material layer 311 b.

As shown in fig. 10 and 11, the first positive tab 22 and the first negative tab 23 extend from the first body 21 and are bent to form a U-shaped structure having an opening. The second positive tab 32 and the second negative tab 33 extend from the second body 31 and are bent to form a U-shaped structure having an opening.

The first negative electrode tab 212 includes a third current collector 212a and a third active material layer 212 b. At the bottom of the first body portion 21 near the negative electrode tab 8, the third current collector 212a is longer than the third active material layer 212b, and the third current collector 212a contacts the first negative electrode tab 23. The third active material layer 212b and the first positive electrode tab 211 are each spaced from the first negative electrode tab 23 by a predetermined distance. The length of the first positive electrode sheet 211 is longer than the length of the third active material layer 212 b.

The second negative electrode sheet 312 includes a fourth current collector 312a and a fourth active material layer 312 b. At a position near the negative electrode tab 8 at the top of the second body portion 31, the fourth current collector 312a is longer than the length of the fourth active material layer 312b, and the fourth current collector 312a contacts the second negative electrode tab 33. The fourth active material layer 312b and the second positive electrode tab 311 are each spaced from the second negative electrode tab 33 by a predetermined distance. The length of the second positive electrode sheet 311 is longer than the length of the fourth active material layer 312 b.

Although not shown in fig. 10, it is understood that the first collector 211a is longer than the length of the first active material layer 211b at the bottom of the first body part 21 near the positive post 7, and the first collector 211a is in contact with the first positive tab 22. The first active material layer 211b and the first negative electrode tab 212 each have a predetermined distance from the first positive electrode tab 22. The length of the first negative electrode sheet 212 is longer than the length of the first active material layer 211 b. At the bottom of the second body portion 31 near the positive post 7, the second collector 311a is longer than the second active material layer 311b, and the second collector 311a contacts the second positive tab 32. The second active material layer 311b and the second negative electrode tab 312 each have a predetermined distance from the second positive electrode tab 32. The length of the second negative electrode sheet 312 is longer than the length of the second active material layer 311 b.

As shown in fig. 12 to 14, a bracket 4 is disposed between the first body portion 21 and the second body portion 31, the bracket 4 is of a U-shaped structure, the bracket 4 includes a first support portion 41, a second support portion 42, and a third support portion 43 connected between the first support portion 41 and the second support portion 42, the first support portion 41 and the second support portion 42 are of a flat plate type structure, the first support portion 41 is inserted into an opening formed on each of the first positive tab 22 and the first negative tab 23, and the second support portion 42 is inserted into an opening formed on each of the second positive tab 32 and the second negative tab 33.

In the embodiment shown in fig. 15, 16, 18 and 19, the battery cell comprises a first end cap 1a and a second end cap 1b, the first side of the housing 1 is provided with a first opening, the second side of the housing 2 is provided with a second opening, the first end cap 1a is used for blocking the first opening, and the second end cap 1b is used for blocking the second opening. The positive post 7 is attached to the first end cap 1a and the negative post 8 is attached to the second end cap 1 b. The positive post 7 comprises a first inner post 71 and a first outer post 72, the first sleeve 7a is mounted on the first end cover 1a, the first outer post 72 is arranged on the outer side of the first end cover 1a and connected with the first sleeve 7a, the first rotating sheet 5 is connected with the first end of the first inner post 71, and the second end of the first inner post 71 penetrates through the first sleeve 7a and is connected with the first sleeve 7a on the outer side of the shell 1. The negative pole column 8 comprises a second inner pole column 81 and a second outer pole column 82, the second outer pole column 82 is arranged on the outer side of the second end cover 1b, the first end of the second inner pole column 81 is located on the inner side of the second end cover 1b and connected with the second adapter sheet 6, and the second end of the second inner pole column 81 penetrates through the second end cover 1b and is connected with the second outer pole column 82.

In the embodiment shown in fig. 17 and 20, the negative pole 8 includes a second inner pole 81 and a second outer pole 82, the second sleeve 8a is mounted on the second end cap 1b, the second outer pole 82 is disposed on the outer side of the second end cap 1b and connected to the second sleeve 8a, the second adaptor piece 6 is connected to the second end of the second inner pole 81, and the second end of the second inner pole 81 passes through the second sleeve 8a and is connected to the second sleeve 8a on the outer side of the housing 1.

As shown in fig. 15 to 17, in this embodiment, both the first interposer 5 and the second interposer 6 are flat in shape. One end of the first rotating connecting sheet 5 is respectively connected with the first positive tab 22 and the second positive tab 32, and the other end is connected with the positive post 7. One end of the second patch 6 is connected with the first negative tab 23 and the second negative tab 33, and the other end is connected with the negative pole 8.

As shown in fig. 18 to 20, in this embodiment, the first interposer 5 and the second interposer 6 are each L-shaped. The first connection portion 51 of the first switching piece 5 is connected to the first positive tab 22 and the second positive tab 32, respectively, the second connection portion 52 is connected to the positive post 7, and the stability of the electrical connection of the second connection portion 52 to the positive post 7 can be enhanced by increasing the contact area of the second connection portion 52 to the positive post 7. Third connecting portion 61 of second adaptor piece 6 is connected with first negative pole ear 23 and second negative pole ear 33 respectively, and fourth connecting portion 62 is connected with negative pole post 8, through the area of contact of increase fourth connecting portion 62 and negative pole post 8, can strengthen the stability that fourth connecting portion and negative pole post 8 electricity are connected.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (19)

1. A battery cell, comprising:

a housing (1) having an opening;

the end cover is used for plugging the opening;

a first body portion (21) provided in the case (1), the first body portion (21) including a first positive electrode tab (211) and a first negative electrode tab (212); and

a second body portion (31) disposed within the housing (1), the second body portion (31) including a second positive electrode tab (311) and a second negative electrode tab (312);

the first main body part (21) and the second main body part (31) are arranged at intervals along a first direction, one end, far away from the second main body part (31) along the first direction, of the first positive pole piece (211) protrudes out of the first main body part (21) and is in contact with a first inner surface of the shell (1), and the first negative pole piece (212) is insulated from the first inner surface of the shell (1); and/or one end of the second positive plate (311) far away from the first main body part (21) along the first direction protrudes out of the second main body part (31) and is in contact with a second inner surface of the shell (1), the second negative plate (312) is insulated from the second inner surface of the shell (1), and the first inner surface and the second inner surface are oppositely arranged.

2. The battery cell according to claim 1, wherein the first positive electrode tab (211) comprises a first current collector (211a) and a first active material layer (211b) formed on the first current collector (211a), and one end of the first current collector (211a) that is away from the second main body portion (31) in the first direction protrudes from the first active material layer (211b) and is in contact with a first inner surface of the case (1); the second positive electrode sheet (311) comprises a second current collector (311a) and a second active material layer (311b) formed on the second current collector (311a), and one end, far away from the first main body part (21), of the second current collector (311a) along the first direction protrudes out of the second active material layer (311b) and is in contact with a second inner surface of the shell (1).

3. The battery cell according to claim 1 or 2, wherein a first preset distance is provided between one end of the first negative electrode sheet (212) away from the second main body portion (31) in the first direction and a first inner surface of the case (1), and a second preset distance is provided between one end of the second negative electrode sheet (312) away from the first main body portion (21) in the first direction and a second inner surface of the case (1).

4. The battery cell according to any one of claims 1 to 3, further comprising a first positive tab (22) and a first negative tab (23) extending from the first body portion (21) and a second positive tab (32) and a second negative tab (33) extending from the second body portion (31), wherein the first positive tab (22) and the first negative tab (23) are disposed at one end of the first body portion (21) near the second body portion (31) in the first direction, and the second positive tab (32) and the second negative tab (33) are disposed at one end of the second body portion (31) near the first body portion (21) in the first direction.

5. The battery cell according to any one of claims 1 to 4, further comprising a bracket (4), the bracket (4) being disposed between the first main body portion (21) and the second main body portion (31) to maintain the first positive electrode tab (211) in contact with a first inner surface of the case (1) and to maintain the second positive electrode tab (311) in contact with a second inner surface of the case (1).

6. The battery cell according to claim 5, wherein the bracket (4) comprises a first support portion (41), a second support portion (42), and a third support portion (43) connected between the first support portion (41) and the second support portion (42), the first support portion (41) being supported between the first body portion (21) and the first positive tab (22) and between the first body portion (21) and the first negative tab (23), the second support portion (42) being supported between the second body portion (31) and the second positive tab (32) and between the second body portion (31) and the second negative tab (33).

7. The battery cell according to any one of claims 4 to 6, further comprising a first transition piece (5), a second transition piece (6), a positive post (7), and a negative post (8), wherein the first positive tab (22) and the second positive tab (32) are both connected to the first transition piece (5), the first transition piece (5) is connected to the positive post (7), the first negative tab (23) and the second negative tab (33) are both connected to the second transition piece (6), and the second transition piece (6) is connected to the negative post (8).

8. The battery cell according to claim 7, wherein the positive post (7) is mounted to a first side of the housing (1), the negative post (8) is mounted to a second side of the housing (1), the first side is opposite to the second side, and the first side and the second side are both parallel to the first direction.

9. The battery cell according to claim 8, characterized in that the end caps comprise a first end cap (1a) and a second end cap (1b), the first side of the housing (1) is provided with a first opening, the second side of the housing (1) is provided with a second opening, the first end cap (1a) is used for sealing off the first opening, and the second end cap (1b) is used for sealing off the second opening.

10. The battery cell according to claim 9, further comprising a first sleeve (7a), wherein the positive post (7) comprises a first inner post (71) and a first outer post (72), the first sleeve (7a) is mounted on the first end cover (1a), the first outer post (72) is disposed outside the first end cover (1a) and connected to the first sleeve (7a), the first rotation plate (5) is connected to a first end of the first inner post (71), and a second end of the first inner post (71) passes through the first sleeve (7a) and is connected to the first sleeve (7a) outside the housing (1).

11. The battery cell according to claim 9 or 10, further comprising a second sleeve (8a), wherein the negative pole (8) comprises a second inner pole (81) and a second outer pole (82), the second sleeve (8a) is mounted on the second end cover (1b), the second outer pole (82) is disposed outside the second end cover (1b) and connected to the second sleeve (8a), the second adaptor plate (6) is connected to a second end of the second inner pole (81), and a second end of the second inner pole (81) penetrates through the second sleeve (8a) and is connected to the second sleeve (8a) outside the housing (1).

12. The battery cell according to any one of claims 7 to 11, wherein the first switching piece (5) comprises a first connection portion (51) extending in a direction perpendicular to the first direction, the first connection portion (51) is connected to the first positive tab (22) and the second positive tab (32), and an end of the first connection portion (51) near the positive post (7) is connected to the positive post (7); or, the first switching piece (5) comprises a first connecting part (51) extending along a direction perpendicular to the first direction and a second connecting part (52) extending along a direction parallel to the first direction, the first connecting part (51) and the second connecting part (52) are connected in an L shape, the first connecting part (51) is connected with the first positive lug (22) and the second positive lug (32), and the second connecting part (52) is connected with the positive post (7).

13. The battery cell according to any one of claims 7 to 12, wherein the second interposer (6) comprises a third connection portion (61) extending in a direction perpendicular to the first direction, the third connection portion (61) is connected to the first negative tab (23) and the second negative tab (33), and an end of the third connection portion (61) near the negative post (8) is connected to the negative post (8); or the second adaptor sheet (6) comprises a third connecting part (61) extending in a direction perpendicular to the first direction and a fourth connecting part (62) extending in a direction parallel to the first direction, the third connecting part (61) and the fourth connecting part (62) are connected in an L shape, the third connecting part (61) is connected with the first negative electrode tab (23) and the second negative electrode tab (33), and the fourth connecting part (62) is connected with the negative electrode post (8).

14. The battery cell according to any one of claims 7 to 13, further comprising a first insulator (9) disposed within the case (1), the first insulator (9) being configured to electrically isolate the negative post (8) from the case (1).

15. The battery cell according to any one of claims 1 to 14, wherein the first main body portion (21) further comprises a first separator, the first main body portion (21) is formed by winding the first positive electrode tab (211), the first negative electrode tab (212), and the first separator together, and the first direction is parallel to a winding center line of the first main body portion (21); and/or the second main body part (31) further comprises a second separator, the second main body part (31) is formed by winding the second positive electrode sheet (311), the second negative electrode sheet (312) and the second separator together, and the first direction is parallel to the winding center line of the second main body part (31).

16. The battery cell according to any one of claims 1 to 15, characterized in that the housing (1) is made of a metal material.

17. A battery comprising a cell according to any one of claims 1 to 16.

18. An electrical consumer, comprising the battery of claim 17, the battery configured to supply electrical energy to the electrical consumer.

19. An apparatus for manufacturing a battery cell, comprising:

providing means configured to provide a housing (1), an end cap, a first main body portion (21) and a second main body portion (31), the housing (1) having an opening, the end cap being configured to close the opening, the first main body portion (21) comprising a first positive tab (211) and a first negative tab (212), the second main body portion (31) comprising a second positive tab (311) and a second negative tab (312); and

a placing device configured to dispose the first main body portion (21) and the second main body portion (31) in the housing (1), dispose the first main body portion (21) and the second main body portion (31) at intervals along a first direction, contact one end of the first positive electrode tab (211) away from the second main body portion (31) along the first direction with a first inner surface of the housing (1), and insulate one end of the first negative electrode tab (212) away from the second main body portion (31) along the first direction with the first inner surface of the housing (1); and/or one end of the second positive electrode sheet (311) far away from the first main body part (21) along the first direction is in contact with a second inner surface of the shell (1), one end of the second negative electrode sheet (312) far away from the first main body part (21) along the first direction is insulated from the second inner surface of the shell (1), and the first inner surface and the second inner surface are oppositely arranged.

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