CN116706409A

CN116706409A - Battery, manufacturing method and manufacturing system thereof, and electric device

Info

Publication number: CN116706409A
Application number: CN202210181666.6A
Authority: CN
Inventors: 王庆
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2023-09-05

Abstract

The application provides a battery, a manufacturing method and a manufacturing system thereof, and an electric device. The battery comprises a battery cell, a first connecting component and a second connecting component. The battery cell includes an electrode terminal, and the first connection assembly includes a first clamping member and a bus member connected to the first clamping member. The second connecting component is connected with the first clamping component, and the plurality of battery cells are clamped between the first clamping component and the second connecting component, so that the bus piece is propped against and electrically connected with the electrode terminals of the plurality of battery cells at least along the first direction. The battery provided by the application has the advantages of simpler and more efficient assembly operation. And the battery has stronger overall structural strength, which is beneficial to improving the shock resistance of the battery.

Description

Battery, manufacturing method and manufacturing system thereof, and electric device

Technical Field

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

Background

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

In addition to improving the performance of batteries, efficiency problems in the battery production process are also a concern in the development of battery technology. Therefore, how to increase the production efficiency of the battery is a continuous improvement in the battery technology.

Disclosure of Invention

The embodiment of the application provides a battery, a manufacturing method and a manufacturing system thereof and an electric device, which can improve the production efficiency of the battery while ensuring the working reliability of the battery.

In a first aspect, an embodiment of the present application provides a battery, including a battery cell, a first connection assembly, and a second connection assembly; the battery cell includes an electrode terminal; the first connecting component comprises a first clamping piece and a converging piece, and the converging piece is connected to the first clamping piece; the second connecting component is connected with the first clamping component, and the plurality of battery cells are clamped between the first clamping component and the second connecting component, so that the bus piece is propped against and electrically connected with the electrode terminals of the plurality of battery cells at least along the first direction.

According to the battery provided by the embodiment of the application, the first connecting component and the second connecting component are arranged, the first connecting component comprises the first clamping piece and the converging piece, the converging piece is connected with the first clamping piece, the plurality of battery units are clamped between the first clamping piece and the second connecting component, the converging piece is abutted with the electrode terminals of the battery units and electrically connected, so that the plurality of battery units are electrically connected, and the electric connection between the plurality of battery units can be realized only by connecting the first clamping piece with the second connecting component. And the battery formed by connecting the first connecting component and the second connecting component has stronger overall structural strength, thereby being beneficial to improving the shock resistance of the battery.

In some embodiments, the electrode terminals are disposed at two ends of the battery cell along the first direction, the second connecting assembly includes a second clamping member and a converging member, the second clamping member is connected with the first clamping member, and the converging member connected with the first clamping member and the converging member connected with the second clamping member are respectively abutted against and electrically connected with the electrode terminals at two ends of the battery cell along the first direction. To the battery monomer that both ends all are provided with electrode terminal, through the connection of first holder and second holder, can realize the electrode terminal at a plurality of battery monomer both ends and the electric connection of converging the piece to realize a plurality of battery monomer's electric connection, so, can further improve the production efficiency of battery.

In some embodiments, the battery cell further includes a case, the electrode terminal is disposed at one end of the case along the first direction, and the case includes a bottom case disposed opposite to the electrode terminal along the first direction; the second connecting assembly comprises a third clamping piece and a converging component, the converging component is connected to the third clamping piece, the third clamping piece is connected with the first clamping piece, and the plurality of battery monomers are clamped between the first clamping piece and the third clamping piece, so that the converging component is propped against and electrically connected with the bottom shells of the plurality of battery monomers. So set up, still can realize simple, efficient electricity connection between the battery monomer to the electrified battery monomer of casing to can further improve the production efficiency of battery.

In some embodiments, the bus bar has a straight section and a curved section connecting adjacent straight sections, the curved section being convexly disposed along the first direction. Therefore, the vibration or impact of the battery cells can be absorbed through the deformation of the bending section, so that the impact or vibration load born by the bus bar is buffered, and the risk of breakage of the bus bar due to vibration is reduced.

In some embodiments, the battery further includes a circuit board, at least a portion of the buss member being electrically connected to the circuit board. Through setting up the circuit board, can gather information such as temperature, the voltage of converging the piece to acquire the operating condition of battery in real time, and in time make corresponding adjustment, guarantee the normal work of battery.

In some embodiments, the first clamping member includes an injection molded portion, and the bus member includes an embedded portion embedded within the injection molded portion and an exposed portion exposed outside the first clamping member. Therefore, the connecting strength of the converging piece and the first clamping piece is higher, the converging piece has higher position precision, and the electric connection of the converging piece and the electrode terminal is convenient to realize.

In some embodiments, the first clamping member includes an end plate disposed at one end of the battery cell in the first direction and configured to be connected to the bus bar, and a connection portion connected to the end plate and configured to be connected to the second connection assembly; the end plate is provided with an avoidance hole penetrating the end plate along the first direction, and the avoidance hole is used for penetrating the electrode terminal. Therefore, the battery monomer and the first clamping piece have good laminating performance, and the connection stability of the first connecting component and the ground pool monomer is provided.

In some embodiments, one of the connection part and the second connection assembly has a pin, and the other one of the connection part and the second connection assembly has a plug hole, and the plug hole is in plug connection with the plug pin, so that the battery cell is clamped between the first clamping piece and the second connection assembly. Through the connection of contact pin and spliced eye, connected mode is simple, high-efficient, can further improve single production efficiency of battery.

In some embodiments, the battery cells are cylindrical, the first clamping member includes a plurality of connection portions, and at least a portion of the battery cells are provided with connection portions therebetween. Thus, the reliability of the contact between the electrode terminals of the battery cells and the bus bar can be improved, and the reliability of the electrical connection between the battery cells can be further improved.

In some embodiments, the plurality of battery cells are arranged in an array along a second direction and a third direction, the second direction intersecting the third direction and being perpendicular to the first direction, respectively; two rows adjacent along the second direction and two columns adjacent along the third direction form quadrilateral units, the inside and the periphery of each quadrilateral unit are provided with connecting parts, and the connecting parts are distributed with the battery units in a dislocation manner along the second direction and the third direction. By the arrangement, the reliability of mutual abutting of the bus piece and the electrode terminal can be further improved, and the reliability of electric connection between the battery cells is further improved.

In some embodiments, the end plate is provided with a guide groove towards one side of the battery cell, the guide groove is used for guiding the cooperation of the battery cell and the end plate, and the avoidance hole is arranged at the bottom of the guide groove. The guide slot can guide the position of the battery cell relative to the end plate so as to ensure the relative position of the electrode terminal of the battery cell and the confluence piece of the first connecting assembly, and reduce the risk of connection failure caused by dislocation of the electrode terminal of the battery cell and the confluence piece. In addition, the guide groove can improve the structural strength of the battery and reduce the risk of dislocation between battery monomers.

In a second aspect, an embodiment of the present application provides an electrical device, including a battery provided in the foregoing embodiment, where the battery is configured to provide electrical energy.

In a third aspect, an embodiment of the present application provides a method for manufacturing a battery, including: providing a battery cell, the battery cell including an electrode terminal; providing a first connecting assembly, wherein the first connecting assembly comprises a first clamping piece and a converging piece, and the converging piece is connected to the first clamping piece; providing a second connection assembly; the battery unit, the first connecting component and the second connecting component are assembled, wherein the second connecting component is connected with the first clamping piece, and the plurality of battery units are clamped between the first clamping piece and the second connecting component, so that the bus piece is propped against and electrically connected with the electrode terminals of the plurality of battery units along the first direction.

In a fourth aspect, an embodiment of the present application provides a manufacturing system of a battery, including: a first providing module for providing a battery cell including an electrode terminal; the second providing module is used for providing a first connecting assembly, the first connecting assembly comprises a first clamping piece and a converging piece, and the converging piece is connected to the first clamping piece; a third providing module for providing a second connection assembly; the assembly module is used for assembling the battery cells, the first connecting assembly and the second connecting assembly, wherein the second connecting assembly is connected with the first clamping piece, and the plurality of battery cells are clamped between the first clamping piece and the second connecting assembly, so that the bus piece is propped against and electrically connected with the electrode terminals of the plurality of battery cells along the first direction.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed 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 other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a vehicle according to an embodiment of the present application;

Fig. 2 is a schematic structural view of a battery according to an embodiment of the present application;

fig. 3 is a schematic structural view of a battery module in a battery according to an embodiment of the present application;

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

fig. 5 is a schematic view of another battery according to an embodiment of the present application;

fig. 6 is a schematic view of an exploded structure of a battery for use in an embodiment of the present application;

fig. 7 is a schematic structural view of a second connection assembly in a battery according to an embodiment of the present application;

fig. 8 is a front view of a battery provided by an embodiment of the present application;

FIG. 9 is a schematic cross-sectional view of the structure of FIG. 8 taken along line A-A;

fig. 10 is a schematic structural view of a first connection assembly in a battery according to an embodiment of the present application;

fig. 11 is a schematic structural view of another first connection assembly in a battery according to an embodiment of the present application;

fig. 12 is a flowchart of a method of manufacturing a battery provided by an embodiment of the present application;

fig. 13 is a schematic structural view of a battery manufacturing system according to an embodiment of the present application.

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

Marking:

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

10. a battery; 11. a first case; 12. a second case;

20. A battery module;

30. a battery cell; 31. an electrode terminal; 32. a housing; 321. a bottom case;

40. a first connection assembly; 41. a first clamping member; 41a, injection molding part; 411. an end plate; 411a, a relief hole; 411b, guide slots; 412. a connection part; 412a, pins; 42. a confluence member; 42a, a straight section; 42b, a curved section; 42c, an embedding part; 42d, exposed portion;

50. a second connection assembly; 50a, plug holes; 51. a second clamping member;

60. a circuit board; 60a, an electrical connection;

100. a manufacturing system; 110. a first providing module; 120. a second providing module; 130. a third providing module; 140. assembling a module;

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

Detailed Description

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

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

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

In the present application, the battery cells may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the present application. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the application. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separator. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate. The positive plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the current collector without the positive electrode active material layer protrudes out of the current collector coated with the positive electrode active material layer, and the current collector without the positive electrode active material layer is laminated to serve as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the current collector without the negative electrode active material layer protrudes out of the current collector coated with the negative electrode active material layer, and the current collector without the negative electrode active material layer is laminated to serve as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the diaphragm can be PP or PE. In addition, the electrode assembly may be a roll-to-roll structure or a lamination structure, and embodiments of the present application are not limited thereto.

After the inventor finds that the production efficiency of the battery is low, systematic analysis and research are performed on the production process of the battery and the mechanism of the battery, and as a result, the inventor finds that in the production process of the existing battery, electrode terminals of the battery monomers need to be electrically connected by adopting a bus piece so as to realize series connection or parallel connection among the battery monomers. The bus bar is usually electrically connected to the electrode terminals by welding, however, the battery includes a plurality of battery cells, and the electrode terminals of each battery cell need to be welded to the bus bar, which consumes more time, and seriously affects the production efficiency of the battery.

Based on the above problems found by the inventors, the inventors have improved the structure of the battery, and the technical solution described in the embodiments of the present application is applicable to the battery, the manufacturing method and the manufacturing system thereof, and the electric device including the battery.

The battery provided by the embodiment of the application comprises a battery cell, a first connecting component and a second connecting component. The battery cell includes an electrode terminal, and the first connection assembly includes a first clamping member and a bus member connected to the first clamping member. The second connecting component is connected with the first clamping component, and the plurality of battery cells are clamped between the first clamping component and the second connecting component, so that the bus piece is abutted against and electrically connected with the electrode terminals of the plurality of battery cells along the first direction.

According to the battery provided by the embodiment of the application, the bus piece is connected with the first connecting component, and the connection between the first connecting component and the second connecting component is used for realizing the abutting and electric connection between the bus piece and the electrode terminal, so that in the production process of the battery, the electric connection between a plurality of battery monomers and the bus piece can be realized only by connecting the first connecting component with the second connecting component, and the operation is simple and efficient.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric equipment in particular.

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

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

The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 10 to supply power to the motor 1a, for example, for operating power requirements at start-up, navigation and travel of the vehicle 1.

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

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

The box is used for holding battery monomer, and the box can be multiple structural style.

In some embodiments, the case may include a first case 11 and a second case 12. The first casing 11 and the second casing 12 are covered with each other. The first casing 11 and the second casing 12 together define an accommodating space for accommodating the battery cell 30. The first casing 11 and the second casing 12 may be hollow structures each having one side opened. The opening side of the first casing 11 is closed to the opening side of the second casing 12, and a casing having an accommodating space is formed. Sealing elements can be further arranged between the first box 11 and the second box 12 to realize sealing connection of the first box 11 and the second box 12.

In practical application, the first case 11 may be covered on top of the second case 12. The first casing 11 may be referred to as an upper casing, and the second casing 12 may be referred to as a lower casing.

The first casing 11 and the second casing 12 may be various shapes, for example, a cylinder, a rectangular parallelepiped, or the like. In fig. 2, the first case 11 and the second case 12 are each of a rectangular parallelepiped structure, for example.

In the battery 10, the number of battery cells may be one or more. If the number of the battery cells is multiple, the battery cells can be connected in series, in parallel or in series-parallel. The series-parallel connection refers to that a plurality of battery monomers are connected in series or in parallel. The plurality of battery cells can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells is accommodated in the box body, or the plurality of battery cells can be connected in series or in parallel or in series-parallel to form the battery module 20. The plurality of battery modules 20 are then connected in series or parallel or a series-parallel combination to form a unit and are accommodated in a case.

In some embodiments, as shown in fig. 3, in the battery module 20, the battery cells 30 are plural. The plurality of battery cells 30 are first connected in series or parallel or a series-parallel combination to form the battery module 20. The plurality of battery modules 20 are then connected in series or parallel or a series-parallel combination to form a unit and are accommodated in a case.

In some embodiments, electrical connection between the plurality of battery cells 30 in the battery module 20 may be achieved through the bus bar 42 to achieve parallel or series-parallel connection of the plurality of battery cells 30 in the battery module 20.

Fig. 4 shows a schematic structural diagram of a battery cell in a battery according to an embodiment of the present application, fig. 5 shows a schematic structural diagram of a battery according to an embodiment of the present application, and fig. 6 is an exploded schematic structural diagram of fig. 5.

As shown in fig. 4 to 6, the battery 10 provided according to the embodiment of the present application includes a battery cell 30, a first connection assembly 40, and a second connection assembly 50, and the battery cell 30 includes an electrode terminal 31. The first connection assembly 40 includes a first clamping member 41 and a confluence member 42, and the confluence member 42 is connected to the first clamping member 41. The second connection assembly 50 is connected to the first clamping member 41, and the plurality of unit cells 30 are clamped between the first clamping member 41 and the second connection assembly 50 such that the bus bar 42 is electrically connected to the electrode terminals 31 of the plurality of unit cells 30 while being abutted against at least along the first direction X.

Specifically, the bus member 42 and the first clamping member 41 may be detachably connected, such as screwed or clamped, or both may be non-detachably connected, such as riveted, welded, or integrally formed, or the like.

The connection portion of the first clamping member 41 and the bus member 42 may be made of an insulating material such as plastic or rubber, and the materials of other portions may be set according to specific requirements.

The connection between the second connection member 50 and the first holder 41 may be a snap fit, a weld, a screw connection, a rivet connection, or the like, so long as the plurality of battery cells 30 can be interposed between the second connection member 50 and the first holder 41 after the connection, and the bus bar 42 is brought into contact with the electrode terminals 31.

The connection portion 412 of the second connection assembly 50 and the first clamping member 41 may be located at the peripheral sides of the plurality of battery cells 30, may be located in an area between the battery cells 30, or may be provided at the peripheral sides of the plurality of battery cells 30 and between the battery cells 30.

The first direction X may be a relative position direction of the battery cell 30 and the first connection assembly 40, or may intersect the relative position direction of the two. Depending on the specific shapes of the bus bar 42 and the electrode terminal 31, the bus bar 42 may abut against the electrode terminal 31 only in the first direction X, or may abut against the electrode terminal 31 in the first direction X and another direction intersecting the first direction X at the same time. For example, if the contact surface between the bus bar 42 and the electrode terminal 31 is in a "U" shape, both surfaces are abutted against each other in the "U" groove.

The battery cells 30 may be cylindrical battery cells or square battery cells, and the specific structure and shape of the bus bar 42 may be set according to the specific structural style of the battery cells 30 and the positional relationship between the electrode terminals 31, so as to realize the electrical connection between the bus bar 42 and the electrode terminals 31 of different battery cells 30. Since the arrangement relationship between the different battery cells 30 and the positional relationship between the electrode assemblies are different, the structures of the different bus bars 42 may also be different as long as the electrical connection between the electrode terminals 31 of the different battery cells 30 can be achieved.

The electrode terminal 31 may be provided at only one end of the battery cell 30, or the electrode terminal 31 may be provided at both ends of the battery cell 30.

In an embodiment in which the electrode terminals 31 are disposed at only one end of the battery cells 30, only the first connection assembly 40 may be provided to include the bus bar 42 to achieve electrical connection between the battery cells 30. The second connection assembly 50 may also be provided to include the bus bar 42 to achieve electrical connection between the battery cells 30. For example, for a cylindrical battery cell having one end provided with the electrode terminal 31, the first connection assembly 40 and the second connection assembly 50 are provided to each include the bus bar 42, the bus bar 42 of the first connection assembly 40 is electrically connected with the electrode terminal 31 of the battery cell 30, and the bus bar 42 of the second connection assembly 50 may be electrically connected with the case 32 of the battery cell 30, so that the electrical connection between the cylindrical battery cells of the single electrode terminal 31 may be also achieved.

In the embodiment where the electrode terminals 31 are disposed at both ends of the battery cells 30, the second connection assembly 50 may also include the bus bar 42, so that the bus bar 42 of the first connection assembly 40 and the bus bar 42 of the second connection assembly 50 are electrically connected with the electrode terminals 31 at both ends of the battery cells 30, respectively, to thereby achieve the electrical connection between the different battery cells 30.

According to the battery 10 provided by the embodiment of the application, the first connecting component 40 and the second connecting component 50 are arranged, the first connecting component 40 comprises the first clamping piece 41 and the converging piece 42, the converging piece 42 is connected with the first clamping piece 41, the plurality of battery cells 30 are clamped between the first clamping piece 41 and the second connecting component 50 through connecting the first clamping piece 41 and the second connecting component 50, the converging piece 42 is abutted to and electrically connected with the electrode terminals 31 of the battery cells 30, and therefore the electric connection among the plurality of battery cells 30 is achieved. And the battery 10 formed by connecting the first connection assembly 40 and the second connection assembly 50 has stronger overall structural strength, which is advantageous for improving the impact resistance of the battery 10.

Fig. 7 is a schematic structural diagram of a second connection assembly in a battery according to an embodiment of the present application.

As shown in fig. 4 to 7, in some embodiments, the electrode terminals 31 are disposed at both ends of the battery cell 30 in the first direction X, and the second connection assembly 50 includes a second holder 51 and a bus bar 42, and the bus bar 42 is connected to the second holder 51. The first holder is connected to the first holder 41, and the bus bar 42 connected to the first holder 41 and the bus bar 42 connected to the second holder 51 are respectively abutted against and electrically connected to the electrode terminals 31 at both ends of the battery cell 30 in the first direction X.

The first clamping member 41 is connected with the second clamping member 51, so that the plurality of battery cells 30 are clamped between the first clamping member 41 and the second clamping member 51, and the electrode terminals 31 at two ends of the battery cells 30 are respectively abutted against the bus bar 42 and electrically connected, so that the first connecting component 40 and the second connecting component 50 are connected, and the first clamping member 41 and the second clamping member 51 can be connected through clamping, threaded connection, welding or riveting.

The configuration of the bus bar 42 connected to the first holder 41 and the bus bar 42 connected to the second holder 51 may be the same or different, as long as the electrical connection between the bus bar 42 and the electrode terminal 31 is achieved.

The second connecting assembly 50 is also provided with the bus bar 42, and for the battery cells 30 with the electrode terminals 31 at both ends, the connection between the electrode terminals 31 at both ends of the battery cells 30 and the bus bar 42 can be achieved through the connection between the first clamping member 41 and the second clamping member 51, so that the electrical connection between the battery cells 30 is achieved, and the production efficiency of the battery 10 can be further improved.

In some embodiments, the battery cell 30 includes a case 32, the electrode terminal 31 is disposed at one end of the case 32 along the first direction X, and the case 32 includes a bottom case 321 disposed opposite to the electrode terminal 31 along the first direction X. The second connection assembly 50 includes a third holder connected to the third holder, and a bus member connected to the first holder 41, and the plurality of battery cells 30 are sandwiched between the first holder 41 and the third holder, such that the bus member abuts against and is electrically connected to the bottom chassis 321 of the plurality of battery cells 30.

Specifically, the battery cells 30 may be cylindrical battery cells having electrode terminals 31 at one ends, and in this case, the case 32 of the battery cell 30 may correspond to one electrode terminal 31 of the battery cell 30, and in order to achieve electrical connection between the battery cells 30, it is necessary to achieve electrical connection between the case 32 of the battery cell 30 and between the electrode terminals 31 of the electrode cell.

The portion of the third holder, which is connected to the bus member, may be made of an insulating material such as plastic, rubber, or the like.

The bus member and the third holder may be fastened, screwed, riveted, or integrally formed as long as electrical connection with the electrode assembly can be achieved.

Through the connection of third holder and first holder 41 to press from both sides a plurality of battery monomer 30 between first holder 41 and the third holder, and with the electrode terminal 31 of battery monomer 30 with the piece 42 that converges offset and electricity is connected, the drain pan 321 of battery monomer 30 offsets and electricity is connected with converging the component, in order to realize the electricity between the battery monomer 30 and connect, so set up, the electricity between the battery monomer 30 is connected simply, high-efficient, further improves the production efficiency of battery 10.

The bus bar 42 may have a flat sheet shape or a curved sheet shape, and of course, may have a block shape, without limitation, as long as electrical connection with the electrode assembly of the battery cell 30 is achieved.

Fig. 8 shows a front view of a battery provided by an embodiment of the present application, and fig. 9 shows a schematic cross-sectional structure of fig. 8 along A-A.

As shown in fig. 8 and 9, in some embodiments, the bus bar 42 has a straight section 42a and a curved section 42b, the curved section 42b connecting adjacent straight sections 42a, the curved section 42b being disposed convexly along the first direction X.

It will be appreciated that, in the use process of the battery 10, the direction in which the battery cells 30 intersect the first direction X, such as between the battery cells 30, may be subjected to an impact load or a vibration load to generate a certain vibration or shake, and transmit the load to the bus member 42, where the bus member 42 includes a straight section 42a and a curved section 42b, and the deformation of the curved section 42b may absorb the vibration or impact of the battery cells 30, so as to buffer the impact or vibration load borne by the bus member 42, and reduce the risk of breakage of the bus member 42 due to the vibration.

In some embodiments, the battery 10 further includes a circuit board 60, at least a portion of the buss member 42 being electrically connected to the circuit board 60.

Specifically, the circuit board 60 may be provided with an electrical connection portion 60a provided to protrude outward, and electrical connection of the circuit board 60 with the bus bar 42 is achieved through the electrical connection portion 60 a.

It can be understood that, in the use process of the battery 10, the working condition of the bus member 42 or the battery unit 30 needs to be known in real time, and the circuit board 60 is arranged and connected with the bus member 42, so that the temperature, the voltage and other information of the bus member 42 can be collected, so as to obtain the working condition of the battery 10 in real time, and make corresponding adjustment in time, thereby ensuring the normal operation of the battery 10.

Alternatively, the circuit board 60 and the first clamping member 41 may be integrated together to save space and improve the structural integrity of the battery 10.

In some embodiments, the first clamping member 41 includes an injection molded portion 41a and the bus member 42 includes an embedded portion 42c and a bare portion 42d. The insertion portion 42c is inserted into the injection molded portion 41a, and the exposed portion 42d is exposed to the outside of the first holder 41.

Specifically, the embedded portion 42c is used to make connection with the first clamping member 41, and the exposed portion 42d may be used to make electrical connection of the bus bar 42 with the electrode terminal 31 or the circuit board 60.

Alternatively, the first holder 41 may be integrally injection-molded, and the insertion portion 42c of the bus bar 42 is inserted into the first holder 41 during injection molding. The first clamping member 41 may be partially injection molded, and the insert portion 42c of the strap of the busbar member 42 is inserted into the injection molded portion 41a during the injection molding, and then the injection molded portion 41a is connected to other portions of the first clamping member 41.

It is understood that the first clamping member 41 is provided to include the injection molding portion 41a, so that the bus member 42 and the first clamping member 41 are integrally connected by injection molding, the connection strength is higher, and the bus member 42 has higher positional accuracy, so that the electrical connection of the bus member 42 and the electrode terminal 31 is facilitated.

Fig. 10 and 11 respectively show schematic structural views of different first clamping members according to an embodiment of the present application.

As shown in fig. 10 and 11, in some embodiments, the first clamping member 41 includes an end plate 411 and a connection part 412, the end plate 411 is disposed at one end of the battery cell 30 in the first direction X and is used to connect with the bus bar 42, and the connection part 412 is connected to the end plate 411 and is used to connect with the second connection assembly 50. The end plate 411 has a relief hole 411a penetrating in the first direction X, and the relief hole 411a is used to penetrate the electrode terminal 31.

Specifically, the connection part 412 may be in a column shape, a block shape, or other shapes, and the shape and position of the connection part 412 are set according to the connection form of the first connection assembly 40 and the second connection assembly 50.

The electrode terminal 31 of the battery cell 30 passes through the escape hole 411a of the end plate 411 to be abutted with the bus bar 42, and the end cap of the battery cell 30 to which the electrode terminal 31 is connected may be attached to the end plate 411, thereby improving the connection stability of the battery cell 30 and the first connection assembly 40.

As shown in fig. 7 and 11, in some embodiments, one of the connection part 412 and the second connection assembly 50 has a pin 412a, and the other one has a socket hole 50a, and the socket hole 50a is in socket connection with the pin 412a, so that the battery cell 30 is sandwiched between the first clamping member 41 and the second connection assembly 50.

Alternatively, the insertion holes 50a and the pins 412a may be provided only on the outer peripheral sides of the plurality of battery cells 30, or the insertion holes 50a and the pins 412a may be provided between the adjacent battery cells 30 at the same time.

In order to improve the connection reliability of the plug hole 50a and the plug pin 412a, a claw may be disposed on one of the plug pin 412a and the plug hole 50a, and a slot may be disposed on the other, so that the plug pin 412a and the plug hole 50a are limited by matching the claw and the slot, the connection strength of the plug pin 412a and the plug hole 50a is further improved, and the overall structural strength of the battery 10 is further improved.

It should be noted that, in the embodiment where the second connection assembly 50 includes the second clamping member 51 or the third clamping member, the second clamping member 51 or the third clamping member may include the pin 412a or the socket 50a to connect the first connection assembly 40 and the second connection assembly 50.

It can be understood that, through the connection between the contact pin 412a and the plug hole 50a, the connection between the first connection assembly 40 and the second connection assembly 50 is realized, and further, the electrical connection between the battery cells 30 is realized, and the connection mode is simple and efficient, so that the production efficiency of the battery cells 30 can be further improved.

In some embodiments, the battery cells 30 are cylindrical, and the first clamping member 41 includes a plurality of connection portions 412, and at least some of the connection portions 412 are disposed between the battery cells 30.

Specifically, the battery cells 30 are cylindrical battery cells 30, gaps exist between some adjacent battery cells 30 in the arrangement process of the battery cells 30, and the connection portions 412 can be arranged in the gaps between the battery cells 30, so that the extra space inside the battery 10 occupied by the connection portions 412 can be reduced, the structural integration level inside the battery 10 is further improved, and the volumetric energy density of the battery 10 is improved.

In addition, the plurality of connection parts 412 are provided, and the connection parts 412 are provided between the battery cells 30, so that the reliability of the contact between the electrode terminals 31 of the battery cells 30 and the bus bar 42 can be improved, and the reliability of the electrical connection between the battery cells 30 can be further improved.

Alternatively, the connection part 412 may be provided between part of the battery cells 30, and the connection part 412 may be provided at the circumferential side of each battery cell 30.

In some embodiments, the plurality of battery cells 30 are arranged in an array along a second direction Y and a third direction Z, the second direction Y intersecting the third direction Z and being perpendicular to the first direction X, respectively. Two rows adjacent along the second direction Y and two columns of battery cells 30 adjacent along the third direction Z form quadrilateral units, the inside and the peripheral side of each quadrilateral unit are provided with connecting portions 412, and the connecting portions 412 are distributed with the battery cells 30 in a dislocation manner along the second direction Y and the third direction Z.

The quadrangle is the connecting wire of the center of four battery single bodies 30, all is provided with battery single bodies 30 on four angles of each quadrangle unit, and two adjacent battery single bodies 30 along second direction Y and third direction Z can be set up at intervals, also can butt each other.

The connecting portions 412 are arranged to be offset from the battery cells 30 along the second direction Y and the third direction Z, i.e., the connecting lines between the connecting portions 412 and the centers of the battery cells 30 are not arranged along the second direction Y or along the third direction Z.

Alternatively, the second direction Y may or may not be perpendicular. In an embodiment in which the second direction Y is perpendicular to the third direction Z, the quadrangle is rectangular or square. Whereas in embodiments in which the second direction Y is not perpendicular to the third direction Z, the quadrilateral is a parallelogram.

The connection part 412 is disposed in each quadrangular unit and on the peripheral side, so that the connection part 412 is disposed on the peripheral side of each battery cell 30, and the connection part 412 is disposed on the peripheral side of the corresponding bus bar 42 electrically connected to the electrode terminal 31 of the battery cell 30, so that the reliability of the contact between the bus bar 42 and the electrode terminal 31 is further improved, and the reliability of the electrical connection between the battery cells 30 is further improved.

In some embodiments, a guide slot 411b is disposed on a side of the end plate 411 facing the battery cell 30, the guide slot 411b is used for guiding the battery cell 30 to be matched with the end plate 411, and the avoidance hole 411a is disposed at the bottom of the guide slot 411b.

Specifically, the circumferential side of the guide slot 411b may be a closed structure or a semi-closed structure, for example, a plurality of guide posts disposed at intervals enclose the guide slot 411b to adapt to the outer shape of the battery cell 30.

The guide slots 411b may be concavely provided in a direction toward the end plate 411 or may be convexly provided outward in a direction toward the battery cell 30. A guiding slot 411b corresponding to one battery cell 30 may be provided, and in the process of installing the battery cell 30 and the first connection assembly 40, the guiding slot 411b may guide the position of the battery cell 30 opposite to the end plate 411, so as to ensure the relative positions of the electrode terminal 31 of the battery cell 30 and the bus member 42 of the first connection assembly 40, and reduce the risk of connection failure caused by dislocation of the electrode terminal 31 and the bus member 42. In addition, the guiding slot 411b can also play a limiting role on the battery cells 30, and in the using process of the battery 10, the guiding slot 411b can improve the structural strength of the battery 10 and reduce the risk of dislocation between the battery cells 30.

As shown in fig. 5 to 11, in some embodiments, the battery 10 includes a first connection assembly 40, a battery cell 30, and a second connection assembly 50, and both ends of the battery cell 30 in the first direction X are provided with electrode terminals 31. The first connection assembly 40 includes a first clamping member 41 and a bus bar member 42, the first clamping member 41 includes an end plate 411 and a pin 412a connected to the end plate 411, and the bus bar member 42 and the end plate 411 are embedded in the end plate 411 by injection molding, so as to improve connection reliability of the bus bar member 42 and the end plate 411. The current collector 42 includes straight sections 42a and curved sections 42b connected between the straight sections 42a, the exposed portions 42d of the straight sections 42a exposed to the outside are electrically connected with the electrode terminals 31 of the battery cells 30, and the curved sections 42b receive impact load when the battery 10 is impacted, so as to ensure connection reliability of the battery cells 30 and the current collector 42. The end plate 411 has guide slots 411b disposed toward the battery cells 30, the guide slots 411b being disposed in an array along the second direction Y and the third direction Y to provide a guide effect to the battery cells 30, and the bottom of the guide slots 411b having escape holes 411a disposed therethrough. The second connection assembly 50 includes a second clamping member 51 and a confluence member 42, and the second clamping member 51 includes a second end plate and a socket hole 50a connected to the second end plate, the second end plate being similar in structure to the end plate 411. The battery cell 30 is sandwiched between the end plate 411 and the second end plate by connection of the insertion hole 50a and the pin 412 a. The pin 412a is disposed in the middle of the quadrangular region formed by the four guide slots 411b, and the socket hole 50a is disposed corresponding to the pin 412a to improve the connection reliability of the first connection assembly 40 and the second connection assembly 50. A catch may be provided on the pin 412a or the socket 50a to reduce the risk of falling off after the connection.

The power utilization device provided by the embodiment of the application comprises the battery 10 provided by any one of the embodiments.

The power utilization device provided by the embodiment of the present application has the same technical effects due to the battery 10 provided by any one of the embodiments, and will not be described herein.

Fig. 12 is a flowchart illustrating a method of manufacturing a battery according to an embodiment of the present application.

As shown in fig. 12, a method for manufacturing a battery according to an embodiment of the present application includes:

s10, providing a battery cell 30, wherein the battery cell 30 includes an electrode terminal 31.

S20, providing a first connection assembly 40, wherein the first connection assembly 40 includes a first clamping member 41 and a bus member 42, and the bus member 42 is connected to the first clamping member 41.

S30, providing a second connection assembly 50.

S40, assembling the battery cells 30, the first connection assembly 40 and the second connection assembly 50, wherein the second connection assembly 50 is connected with the first clamping member 41, and the plurality of battery cells 30 are clamped between the first clamping member 41 and the second connection assembly 50, so that the bus bar 42 abuts against and is electrically connected with the electrode terminals 31 of the plurality of battery cells 30 along the first direction X.

According to the manufacturing method of the battery, the battery unit 30 is clamped between the first clamping piece 41 and the second connecting component 50, so that the electrode terminal 31 of the battery unit 30 is connected with the confluence piece 42, and further, the electric connection of the battery unit 30 is achieved, therefore, the electric connection between the battery units 30 can be achieved only by connecting the first clamping piece 41 with the second connecting component 50, the connecting method is simple and efficient, and the production efficiency of the battery 10 can be effectively improved.

Fig. 13 is a schematic diagram showing a structure of a battery manufacturing system according to an embodiment of the present application.

As shown in fig. 13, a battery manufacturing system 100 according to an embodiment of the present application includes: the first providing module 110, the second providing module 120, the third providing module 130, and the assembling module 140. The first supply module 110 is used for supplying the battery cell 30, and the battery cell 30 includes the electrode terminal 31. The second providing module 120 is configured to provide a first connecting assembly 40, where the first connecting assembly 40 includes a first clamping member 41 and a converging member 42, and the converging member 42 is connected to the first clamping member 41. The third providing module 130 is configured to provide the second connection assembly 50. The assembly module 140 is used for assembling the battery cells 30, the first connection assembly 40 and the second connection assembly 50, wherein the second connection assembly 50 is connected with the first clamping member 41, and the plurality of battery cells 30 are clamped between the first clamping member 41 and the second connection assembly 50, so that the bus bar 42 abuts against and is electrically connected with the electrode terminals 31 of the plurality of battery cells 30 along the first direction X. 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, and in particular, the technical features set forth in the various embodiments may be combined in any manner so long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery (10), characterized by comprising:

a battery cell (30) including an electrode terminal (31);

a first connection assembly (40) comprising a first clamping member (41) and a confluence member (42), the confluence member (42) being connected to the first clamping member (41);

and a second connecting assembly (50) connected with the first clamping member (41), wherein a plurality of battery cells (30) are clamped between the first clamping member (41) and the second connecting assembly (50), so that the bus member (42) is abutted against and electrically connected with the electrode terminals (31) of the plurality of battery cells (30) at least along a first direction (X).

2. The battery (10) according to claim 1, wherein the electrode terminals (31) are disposed at both ends of the battery cell (30) in the first direction (X), the second connection assembly (50) includes a second clamping member (51) and the bus member (42), the second clamping member (51) is connected with the first clamping member (41), and the bus member (42) connected with the first clamping member (41) and the bus member (42) connected with the second clamping member (51) are respectively abutted against and electrically connected with the electrode terminals (31) of the battery cell (30) at both ends in the first direction (X).

3. The battery (10) according to claim 1, wherein the battery cell (30) further includes a case (32), the electrode terminal (31) is provided at one end of the case (32) in the first direction (X), and the case (32) includes a bottom case (321) provided opposite to the electrode terminal (31) in the first direction (X);

the second connecting assembly (50) comprises a third clamping piece and a converging member, the converging member is connected to the third clamping piece, the third clamping piece is connected with the first clamping piece (41), a plurality of battery cells (30) are clamped between the first clamping piece (41) and the third clamping piece, and the converging member is propped against and electrically connected with the bottom shell (321) of the battery cells (30).

4. The battery (10) of claim 1, wherein the bus bar (42) has a straight section (42 a) and a curved section (42 b), the curved section (42 b) connecting adjacent the straight section (42 a), the curved section (42 b) being disposed convexly along the first direction (X).

5. The battery (10) of claim 1, wherein the battery (10) further comprises a circuit board (60), at least a portion of the bus bar (42) being electrically connected to the circuit board (60).

6. The battery (10) according to claim 1, wherein the first holder (41) includes an injection-molded portion (41 a), the bus bar (42) includes an embedded portion (42 c) and a bare portion (42 d), the embedded portion (42 c) is embedded in the injection-molded portion (41 a), and the bare portion (42 d) is exposed to the outside of the first holder (41).

7. The battery (10) according to any one of claims 1 to 6, wherein the first clamping member (41) includes an end plate (411) and a connecting portion (412), the end plate (411) being provided at one end of the battery cell (30) in the first direction (X) and being for connection with the bus member (42), the connecting portion (412) being connected to the end plate (411) and being for connection with the second connecting assembly (50);

the end plate (411) is provided with a relief hole (411 a) penetrating along the first direction (X), and the relief hole (411 a) is used for penetrating the electrode terminal (31).

8. The battery (10) according to claim 7, wherein one of the connection portion (412) and the second connection assembly (50) has a pin (412 a), and the other has a plug hole (50 a), and the plug hole (50 a) is plug-connected with the plug pin so that the battery cell (30) is sandwiched between the first clamp (41) and the second connection assembly (50).

9. The battery (10) according to claim 7, wherein the battery cells (30) are cylindrical, the first clamping member (41) includes a plurality of the connection portions (412), and the connection portions (412) are provided between at least a part of the battery cells (30).

10. The battery (10) according to claim 8, wherein a plurality of the battery cells (30) are arranged in an array in a second direction (Y) intersecting the third direction (Z) and being perpendicular to the first direction (X), respectively;

two rows adjacent along the second direction (Y) and two columns adjacent along the third direction (Z) the battery cells (30) form quadrilateral units, the inside and the periphery of each quadrilateral unit are provided with connecting parts (412), and the connecting parts (412) are distributed in a dislocation manner along the second direction (Y) and the third direction (Z) with the battery cells (30).

11. The battery (10) according to claim 7, wherein a guide groove (411 b) is provided at a side of the end plate (411) facing the battery cell (30), the guide groove (411 b) is used for guiding the cooperation of the battery cell (30) and the end plate (411), and the escape hole (411 a) is provided at a bottom of the guide groove (411 b).

12. An electrical device comprising a battery (10) according to any one of claims 1 to 11, said battery (10) being adapted to provide electrical energy.

13. A method of manufacturing a battery, comprising:

providing a battery cell (30), the battery cell (30) comprising an electrode terminal (31);

-providing a first connection assembly (40), the first connection assembly (40) comprising a first clamping member (41) and a confluence member (42), the confluence member (42) being connected to the first clamping member (41);

providing a second connection assembly (50);

assembling the battery cells (30), the first connecting assembly (40) and the second connecting assembly (50), wherein the second connecting assembly (50) is connected with the first clamping piece (41), and a plurality of the battery cells (30) are clamped between the first clamping piece (41) and the second connecting assembly (50), so that the bus bar (42) and a plurality of the electrode terminals (31) of the battery cells (30) are propped against and electrically connected along a first direction (X).

14. A system for manufacturing a battery, comprising:

a first providing module for providing a battery cell (30), the battery cell (30) comprising an electrode terminal (31);

a second providing module for providing a first connection assembly (40), the first connection assembly (40) comprising a first clamping member (41) and a confluence member (42), the confluence member (42) being connected to the first clamping member (41);

A third providing module for providing a second connection assembly (50);

the assembly module is used for assembling the battery cells (30), the first connecting assembly (40) and the second connecting assembly (50), wherein the second connecting assembly (50) is connected with the first clamping piece (41), a plurality of battery cells (30) are clamped between the first clamping piece (41) and the second connecting assembly (50), and the bus bar (42) and a plurality of electrode terminals (31) of the battery cells (30) are propped against and electrically connected along a first direction (X).