WO2023088042A1

WO2023088042A1 - Battery, electrical apparatus, and apparatus for preparing battery

Info

Publication number: WO2023088042A1
Application number: PCT/CN2022/127136
Authority: WO
Inventors: 李俊荣; 林伟龙
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2021-11-20
Filing date: 2022-10-24
Publication date: 2023-05-25
Also published as: CN216850245U

Abstract

Provided in the present application are a battery, an electrical apparatus, and an apparatus for preparing a battery. The power supply stability performance of the battery can be improved. A sampling member of the battery provided in a first aspect of the present application comprises a sampling pin and a signal portion, and an electrode terminal comprises a sampling hole, which fits the sampling pin, wherein the sampling pin is inserted into the sampling hole to be connected to the electrode terminal, and the signal portion is connected to the sampling pin. The battery can overcome the problem of a sampling member in an existing battery being prone to falling off of an electrode terminal.

Description

Batteries, electrical devices and devices for preparing batteries

This application claims priority to a Chinese patent application with application number 202122851903.9 filed on November 20, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of batteries, in particular to a battery, an electrical device and a device for preparing the battery.

Background technique

At present, electric vehicles have become the mainstream trend of the development of the automobile industry. The application of electric vehicles has effectively solved the problem of sustainable development of energy and the environment. Poor environment and other reasons lead to poor stability of the power supply of the battery, which affects the power supply performance of the battery. How to improve the stable performance of battery power supply has become an urgent problem to be solved.

technical problem

In view of the problem of poor power supply stability of the battery, the present application provides a battery, an electrical device and a device for preparing the battery, which can improve the power supply stability of the battery.

technical solution

The first aspect of the present application provides a battery, including a battery unit, and the battery unit includes at least two battery cells and a sampling piece. At least two battery cells are arranged along the length direction of the battery cells and electrically connected to each other. Each battery cell includes a main body and two electrode terminals with opposite polarities. Two electrode terminals are respectively arranged at both ends of the main body along the length direction, and the two electrode terminals protrude from the main body in a direction away from the interior of the battery cells, wherein, in the length direction, between the bodies of two adjacent battery cells A first gap is formed, two adjacent electrode terminals are oppositely arranged and contact each other, sampling holes are arranged on the electrode terminals, and the sampling holes of the two contacting electrode terminals communicate with each other. The sampling piece is connected to the electrode terminal for signal collection of the connected battery cells. Wherein, the sampling part includes a sampling pin and a signal part. At least part of the sampling pin is inserted into the sampling hole. The signal part is located outside the first gap and connected to the sampling pin, and the signal part is used to transmit the collected signal of the battery cell.

In an embodiment of the present application, the battery further includes a support. The supporting piece is located outside the first gap and connected with the battery unit, and the supporting piece is used for connecting with the signal part and supporting the signal part. Setting the support can provide a support base for the welding of the sampling piece and the sampling line.

In an embodiment of the present application, the supporting member includes a locking portion and a supporting portion. The clamping portion is disposed at an end of the support member away from the battery cell, and the clamping portion is used for clamping with the signal portion. The supporting part is arranged at the other end of the supporting part, and the supporting part is connected with the battery unit and is used for supporting the signal part.

In an embodiment of the present application, an accommodating space is formed between the engaging part and the supporting part, and the accommodating space is used for accommodating the signal part.

In an embodiment of the present application, the signal part is provided with a fixing hole. The support member includes a fixing part, one end of the fixing part is connected to the clamping part, and the other end is connected to the support part, and the fixing part is used to pass through the fixing hole so that the signal part is fixedly connected to the clamping part.

In an embodiment of the present application, the engaging portion includes a first engaging portion, a second engaging portion and a second gap. The first clamping part and the second clamping part are connected to the same surface of the support part, and are respectively connected to opposite ends of the support part. A second gap is formed between the first clamping portion and the second clamping portion, and the second gap is used to expose part of the surface of the signal portion.

In an embodiment of the present application, the first engaging portion is connected to at least one fixing portion, and the second engaging portion is connected to at least one fixing portion.

In an embodiment of the present application, the supporting part includes a glue holding groove, and the glue holding groove is used for accommodating part of the adhesive when the supporting member is bonded to the battery cell.

The second aspect of the present application provides an electrical device, including any battery in the above embodiments, the battery is used to provide electrical energy.

The third aspect of the present application provides a device for preparing a battery, including a first providing module, a second providing module and an installation module. The first providing module is used for providing at least two battery cells. At least two battery cells are arranged along the length direction of the battery cells and are electrically connected to each other. Each battery cell includes a main body and two electrode terminals with opposite polarities. The two electrode terminals are respectively arranged at both ends of the main body along the length direction. Two electrode terminals protrude from the main body in a direction away from the inside of the battery cell, wherein, in the length direction, a first gap is formed between the bodies of two adjacent battery cells, and the two adjacent electrode terminals are oppositely arranged And abutting, the electrode terminals are provided with sampling holes, and the sampling holes of the two abutting electrode terminals communicate with each other. The second providing module is used for providing a sampling piece, which is connected to the electrode terminal to collect signals from the connected battery cells. Wherein, the sampling part includes a sampling pin and a signal part, and at least part of the sampling pin is inserted into the sampling hole. The signal part is located outside the first gap and connected to the sampling pin, and the signal part is used to transmit the collected signal of the battery cell. The installation module is used for installing the sampling piece on the battery cell.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Beneficial effect

The technical scheme that the sampling piece is inserted into the sampling hole so as to be connected with the electrode terminal can prevent the sampling piece from falling off from the electrode terminal.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the application. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

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

Fig. 2 is a schematic structural diagram of a battery pack provided by an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a battery unit provided by an embodiment of the application;

Fig. 4 is a schematic diagram of an exploded structure of a battery cell provided by an embodiment of the present application;

Fig. 5 is a schematic diagram of a partial explosion of a battery unit provided by an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a sampling piece provided by an embodiment of the present application;

Fig. 7 is a schematic diagram of a partial structure of a battery unit provided by an embodiment of the present application;

Fig. 8 is a schematic structural diagram of a support provided by an embodiment of the present application;

Fig. 9 is a schematic diagram of the size of an end cap provided by an embodiment of the present application;

Fig. 10 is a schematic block diagram of a device for preparing a battery according to an embodiment of the present application.

The reference numerals in the specific embodiment are as follows:

1 vehicle, 10 batteries, 11 controllers, 12 motors;

20 battery unit, 200 first gap, 21 battery cell, 211 end cover, 211a electrode terminal, 210 sampling hole, 21a main body, 212 casing, 213 electrode assembly;

30 cabinet, 301 first part, 302 second part;

40 sampling pieces, 41 sampling pins, 42 signal parts, 43 fixing holes;

50 support member, 51 clamping part, 511 first clamping part, 512 second clamping part, 510 second gap, 52 supporting part, 520 glue tank, 53 accommodating space, 54 fixing part.

Embodiments of the present invention

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application shall have ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "diameter The orientation or positional relationship indicated by "to", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiment of the present application and simplifying the description, rather than indicating or implying the referred device or element Must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In addition, the technical terms "first", "second" and so on are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, or It can be a detachable connection, or integrated; it can also be a mechanical connection, it can also be an electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

In the description of the embodiments of the present application, unless otherwise specified and limited, the first feature may be in direct contact with the first feature or the second feature "on" or "under" the second feature. Indirect contact through intermediaries. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

A battery in the prior art is composed of at least two battery cells arranged in the length direction of the battery cells and electrically connected. The sampling piece of the electrode terminal is used for signal collection, and the sampling piece is clamped on the peripheral side wall of the electrode terminal. This connection method has the problem that the sampling piece is easy to fall off from the electrode terminal when the battery encounters bumps.

The applicant provides a battery after research. The sampling part of the battery includes a sampling pin and a signal part, and the electrode terminal includes a sampling hole matched with the sampling pin. pin connection for passing the collected signal from the battery cell. The battery can overcome the problem that the sampling piece is easy to fall off from the electrode terminal in the existing battery.

The application provides a battery, an electrical device using the battery and a device for preparing the battery. Such batteries may be primary batteries or secondary batteries, for example, secondary batteries include nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid (or lead storage) batteries, lithium-ion batteries, sodium-ion batteries, polymer batteries, and the like. This battery is suitable for a variety of electrical devices that use batteries, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include aircraft, rockets, aerospace Aircraft and spacecraft, etc.; batteries are used to provide electrical energy for the above-mentioned electrical devices.

It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the batteries, electrical devices, and manufacturing devices described above, but also applicable to electrical devices using batteries. However, for the sake of brevity, the following embodiments are all An electric vehicle is used as an example for description.

Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1 provided by some embodiments of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The interior of the vehicle 1 is provided with a battery 10 , and the battery 10 may be provided at the bottom, head or tail of the vehicle 1 . The battery 10 can be used for power supply of the vehicle 1 , for example, the battery 10 can be used as an operating power source of the vehicle 1 . The vehicle 1 may further include a controller 11 and a motor 12 , the controller 11 is used to control the battery 10 to supply power to the motor 12 , for example, for starting, navigating, and working power requirements of the vehicle 1 during driving.

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

In order to meet different power usage requirements, the battery 10 may include at least two battery cells 21 , and the battery cells 21 refer to the smallest unit forming a battery cell 20 or a battery pack. At least two battery cells 21 may be connected in series and/or in parallel via electrode terminals for various applications. The batteries referred to in this application include battery cells 20 or battery packs. Wherein, at least two battery cells 21 may be connected in series, in parallel or in mixed connection, and the mixed connection refers to a mixture of series and parallel connection. The battery 10 may also be called a battery pack. In the embodiment of the present application, at least two battery cells 21 can directly form a battery pack, or can form the battery unit 20 first, and then the battery unit 20 can form a battery pack.

FIG. 2 shows a schematic structural diagram of a battery 10 according to an embodiment of the present application. In FIG. 2 , the battery 10 may include a plurality of battery cells 20 and a case 30 , and the plurality of battery cells 20 are accommodated inside the case 30 . The box body 30 is used for accommodating the battery cell 21 or the battery cell 20 , so as to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell 21 . The box body 30 may be a simple three-dimensional structure such as a single cuboid, cylinder or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid, cylinder or sphere, which is not limited in this embodiment of the present application. The material of the box body 30 can be such as alloy materials such as aluminum alloy, iron alloy, also can be as polymer material such as polycarbonate, polyisocyanurate foamed plastics, or be the composite material such as glass fiber plus epoxy resin, The embodiment of the present application does not limit this.

In some embodiments, the box body 30 may include a first part 301 and a second part 302, the first part 301 and the second part 302 cover each other, the first part 301 and the second part 302 jointly define a Space. The second part 302 can be a hollow structure with one end open, the first part 301 can be a plate-shaped structure, and the first part 301 covers the opening side of the second part 302, so that the first part 301 and the second part 302 jointly define a battery. The space of the unit 21 ; the first part 301 and the second part 302 can also be a hollow structure with one side opening, and the opening side of the first part 301 covers the opening side of the second part 302 .

FIG. 3 shows a schematic structural diagram of a battery unit 20 according to an embodiment of the present application. In FIG. 3 , the battery unit 20 may include at least two battery cells 21 or only two battery cells 21 . At least two battery cells 21 can be connected in series, parallel or mixed to form the battery unit 20 , and then multiple battery units 20 can be connected in series, parallel or mixed to form the battery 10 . In the present application, the battery cell 21 may include a lithium ion battery, a sodium ion battery or a magnesium ion battery, etc., which is not limited in this embodiment of the present application. The battery cell 21 may be in the shape of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application. The battery cells 21 are generally divided into three types according to the packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in this embodiment of the present application. However, for the sake of brevity, the following embodiments all take the square-shaped battery cell 21 as an example for illustration.

FIG. 4 is a schematic diagram of an exploded structure of a battery cell 21 provided in some embodiments of the present application. The battery cell 21 refers to the smallest unit constituting the battery 10 . As shown in FIG. 4 , the battery cell 21 includes an end cover 211 and a main body 21 a. Wherein, the end cap 211 includes an electrode terminal 211 a, and the main body 21 a includes a casing 212 and an electrode assembly 213 .

The end cap 211 refers to a component that covers the opening of the casing 212 to isolate the internal environment of the battery cell 21 from the external environment. The shape of the end cap 211 may be adapted to the shape of the housing 212 to fit the housing 212 . Optionally, the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 211 is not easily deformed when it is squeezed and collided, so that the battery cell 21 can have a higher Structural strength and safety performance can also be improved. Functional components such as electrode terminals 211 a may be provided on the end cap 211 . The electrode terminal 211 a can be used to be electrically connected with the electrode assembly 213 for outputting or inputting electric energy of the battery cell 21 . In some embodiments, the end cap 211 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. In some embodiments, an insulator can be provided inside the end cover 211 , and the insulator can be used to isolate the electrical connection components in the housing 212 from the end cover 211 to reduce the risk of short circuit. Exemplarily, the insulating member may be plastic, rubber or the like. The electrode terminals 211a can be in various shapes such as cylinders, cuboids, cubes, and polygonal columns, and the electrode terminals 211a shown in this embodiment have a cuboid structure. The battery cell 21 may be a cuboid, a cube or a cylinder, and the battery cell 21 shown in this embodiment has a cuboid structure.

The main body 21 a includes a case 212 and an electrode assembly 213 . At least one end of the housing 212 along the length direction L of the battery cell 21 has an opening (not shown in the figure), so that one or more electrode assemblies 213 can be placed in the main body 21a from the opening, and the end cap 211 is used to close the Open your mouth. The main body 21a is filled with an electrolyte such as electrolytic solution. As shown in FIG. 4 , the casing 211 may have openings at both ends along the length direction L of the battery cell 21, and the battery cell 21 may include two end caps 211, and the two end caps 211 respectively close the sides of the casing 211. Open at both ends.

The casing 212 is a component for matching with the end cap 211 to form the internal environment of the battery cell 21 , wherein the formed internal environment can be used to accommodate the electrode assembly 213 , electrolyte (not shown in the figure) and other components. The housing 212 and the end cover 211 can be independent parts, and an opening (not shown in the figure) can be provided on the housing 212, and the internal environment of the battery cell 21 can be formed by making the end cover 211 cover the opening at the opening. . Optionally, the end cover 211 and the housing 212 can also be integrated. Specifically, the end cover 211 and the housing 212 can form a common connection surface before other components are inserted into the housing. When the inside of the housing 212 needs to be encapsulated , then make the end cover 211 cover the housing 212 . The housing 212 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 212 may be determined according to the specific shape and size of the electrode assembly 213 . The housing 212 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.

The electrode assembly 213 is a part where electrochemical reaction occurs in the battery cell 21 . One or more electrode assemblies 213 may be contained within the casing 212 . The electrode assembly 213 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with the active material constitute the main body of the electrode assembly 213 , and the parts of the positive electrode sheet and the negative electrode sheet without the active material respectively constitute tabs (not shown in the figure). The positive pole tab and the negative pole tab can be located at one end of the main body together or at two ends of the main body respectively. During the charging and discharging process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminal 211a to form a current loop.

Please refer to FIG. 5 and FIG. 6 . FIG. 5 is a schematic diagram of a partial explosion of a battery unit 20 provided in an embodiment of the present application, and FIG. 6 is a schematic structural diagram of a sampling piece 40 provided in the present application. The embodiment of the present application provides a battery 10 including a battery unit 20 . The battery unit 20 includes at least two battery cells 21 and a sampling piece 40 , and the at least two battery cells 21 are arranged along the length direction L of the battery cells 21 and are electrically connected to each other. Each battery cell 21 includes a main body 21a and two electrode terminals 211a with opposite polarities. The two electrode terminals 211a are respectively arranged at both ends of the main body 21a along the length direction L. 21 interior directions stand out. Wherein, in the length direction L, a first gap 200 is formed between the main bodies 21a of two adjacent battery cells 21, and two adjacent electrode terminals 211a are oppositely arranged and abutted against each other. The holes 210 and the sampling holes 210 of the two contacting electrode terminals 211 a communicate with each other. The sampling part 40 is connected to the electrode terminal 211 a for collecting signals from the connected battery cells 21 . Wherein, the sampling part 40 includes a sampling pin 41 and a signal part 42 . At least part of the sampling pin 41 is inserted into the sampling hole 210 , the signal part 42 is located outside the first gap 200 and connected to the sampling pin 41 , and the signal part 42 is used to transmit the collected signal of the battery cell 21 .

The two electrode terminals 211a are respectively a positive electrode terminal and a negative electrode terminal, and are respectively provided at both ends of the main body 21a along the length direction L. Since the two electrode terminals 211a are respectively provided on the two end caps 211, the electrode terminals 211a can be insulated from the end caps 212, so the main body 21a can be made insulated from the positive and/or negative electrodes without charging. When the main body 21a is not charged, the probability of short circuit can be reduced, thereby improving the safety performance of the battery cell 21 . In this embodiment, the electrode terminals 211a of the two electrically connected battery cells 21 protrude from the main body 21a in a direction away from the inside of the battery cells 21 . It should be noted that, it is also possible that the electrode terminal 211a of one of the two battery cells 21 protrudes from the main body 21a toward the direction away from the inside of the battery cell 21, while the electrode terminal 211a of the other battery cell 21 is connected to the end cover. 211 flush. It is also possible that the two electrode terminals 211 a of each battery cell 21 protrude from the main body 21 a in a direction away from the inside of the battery cell 21 . In this embodiment, the electrode terminals 211a of the two battery cells 21 are directly connected to realize electrical connection. It should be noted that the electrical connection of the two battery cells 21 can also be realized through a connection structure such as a connecting piece (not shown in the figure).

In some embodiments, each battery cell 21 may include two electrode terminals 211 a respectively disposed at two ends. The electrode terminals 211a of the two battery cells 21 located at both ends of the battery unit 20 that are not in contact with other electrode terminals 211a do not protrude from the end cover 211, and the electrode terminals 211a of all battery cells 21 located in the middle of the battery unit 20 are not in contact with other electrode terminals 211a. The abutting electrode terminals 211 a protrude from the end cover 211 . This embodiment can reduce the volume of the battery unit 20 and increase the energy density of the battery 10 .

The sampling hole 210 is disposed on the electrode terminal 211a. In this embodiment, sampling holes 210 are provided on the respective electrode terminals 211 a of the two electrically connected battery cells 21 . It should be noted that the sampling hole 210 may also be provided on the electrode terminal 211 a of one of the two battery cells 21 , while the electrode terminal 211 a of the other battery cell 21 is not provided with the sampling hole 210 . It is also possible that one of the two electrode terminals 211 a of each battery cell 21 is provided with a sampling hole 210 , while the other electrode terminal 211 a is not provided with a sampling hole 210 . A single sampling hole 210 can be a cylinder, a cone or a cuboid, or a single sampling hole 210 can be half a cylinder, half a cone or half a cuboid, that is, the two electrode terminals 211a that abut against each other. The two sampling holes 210 form a cylinder, a cone or a cuboid.

The first gap 200 is formed by the main bodies 21 a of two adjacent battery cells 21 , and at least one of the two electrode terminals 211 a of each battery cell 21 is located in the first gap 200 .

The sampling part 40 can be formed of conductive materials such as aluminum alloy or steel, copper, etc., and is used for collecting and transmitting signals. The signal collected by the sampling part 40 is transmitted to a signal processor through a flexible flat cable or a flexible circuit board for processing.

The sampling pin 41 can be made of metal materials such as aluminum alloy. The shape of the sampling pin 41 matches the sampling hole 210 , for example, if the sampling hole 210 is cylindrical, the sampling pin 41 is also cylindrical. A part of the sampling pin 41 may be located in the first gap 200 and inserted into the sampling hole 210 , and another part of the sampling pin 41 may be located outside the first gap 200 and connected to the signal part 42 . The sampling pin 41 can be interference fit with the sampling hole 210 . The interference fit between the sampling pin 41 and the sampling hole 210 can improve the stability of the connection between the sampling piece 40 and the battery cell 21 . The sampling pin 41 may be welded to the two abutting electrode terminals 211a. The welding connection between the sampling pin 41 and the two abutting electrode terminals 211 a can improve the stability of the connection between the sampling piece 40 and the battery cell 21 .

The signal part 42 is used for connecting with a sampling line (not shown in the figure) of the battery 10 to transmit a signal. The sampling line between the signal part 42 and the battery 10 can be laser welded or ultrasonically welded. The signal portion 42 is located outside the first gap 200 , and one end of the signal portion 42 is connected to the sampling pin 41 . The signal part 42 can be made of metal materials such as aluminum alloy.

The technical solution that the sampling piece 40 is inserted into the sampling hole 210 so as to be connected to the electrode terminal 211a can prevent the sampling piece 40 from falling off from the electrode terminal 211a.

Please refer to FIG. 6 to FIG. 8 . FIG. 7 is a schematic partial structure diagram of a battery unit 20 provided by an embodiment of the present application, and FIG. 8 is a schematic structural diagram of a support member 50 provided by an embodiment of the present application. Optionally, the battery unit 20 further includes a support member 50 located outside the first gap 200 and connected to the battery cell 21 , the support member 50 is used to connect with the signal part 42 and support the signal part 42 .

The supporter 50 may be formed of polycarbonate and polyacrylonitrile materials to have an insulating function. The supporting member 50 can be bonded on the outer surface of the battery cell 21 . The signal part 42 of the sampling part 40 may be exposed on the upper surface of the supporting part 50 to facilitate the contact of the flexible flat cable or the flexible circuit board with the sampling part 40 and transmit the collected signal. The supporting member 50 and the sampling member 40 can be integrally formed by in-mold injection molding or other methods, or can be a separate structure, connected together by clipping, and can also be connected by hot-press riveting and other methods.

The supporting member 50 can provide a supporting base for the welding of the sampling part 40 and the sampling line.

Please refer to FIG. 8 , optionally, the support member 50 includes a locking portion 51 and a support portion 52 . The engaging portion 51 is disposed at an end of the supporting member 50 away from the battery cell 21 , and the engaging portion 51 is used for engaging with the signal portion 42 . The support part 52 is disposed at the other end of the support member 50 , and the support part 52 is connected to the battery cell 21 and used for supporting the signal part 42 .

Referring to FIG. 8 , optionally, an accommodating space 53 is formed between the engaging portion 51 and the supporting portion 52 , and the accommodating space 53 is used for accommodating the signal portion 42 .

The engaging portion 51 is used for engaging the signal portion 42 between the engaging portion 51 and the supporting portion 52 . A gap, that is, an accommodating space 53 may be formed between the engaging portion 51 and the supporting portion 52 . At least part of the signal part 42 can be inserted into the receiving space 53 so that the sampling part 40 is clamped to the supporting part 50 .

The portion of the support portion 52 that contacts the main body 21a of the battery cell 21 may be a flat plate, but the structure of the support member 50 is not limited thereto, and may also be formed as a curve that matches the shape of the main body 21a of the battery cell 21 that it contacts. plate. Moreover, the battery 10 may further include a temperature sampler (not shown in the figure). The temperature sampler may be disposed on the support member 50 and be in contact with the main body 21a of the battery cell 20 for temperature measurement.

Referring to FIGS. 6 to 8 , optionally, the signal portion 42 is provided with a fixing hole 43 . The supporting member 50 includes a fixing portion 54 , one end of which is connected to the engaging portion 51 and the other end is connected to the supporting portion 52 , and the fixing portion 54 is used to pass through the fixing hole 43 so that the signal portion 42 is fixedly connected to the engaging portion 51 .

The fixing hole 43 may be circular, and the fixing hole 43 may be a through hole. The signal part 42 may be provided with a single or a plurality of fixing holes 43 on its surface.

The number of fixing portions 54 included in the support member 50 is equal to the number of fixing holes 43 . The shape of the fixing portion 54 matches the fixing hole 43 . The fixing part 54 may be a cylinder. The fixing part 54 may be disposed in the receiving space 53 .

Referring to FIG. 8 , optionally, the engaging portion 51 includes a first engaging portion 511 , a second engaging portion 512 and a second gap 510 . The first engaging portion 511 and the second engaging portion 512 are connected to the same surface of the supporting portion 52 and are respectively connected to opposite ends of the supporting portion 52 . The second gap 510 is formed between the first engaging portion 511 and the second engaging portion 512 , and the second gap 510 is used to expose part of the surface of the signal portion 42 .

Referring to FIG. 8 , optionally, the first engaging portion 511 is connected to at least one fixing portion 54 , and the second engaging portion 512 is connected to at least one fixing portion 54 .

The first engaging portion 511 and the second engaging portion 512 may be bar-shaped structures. The first engaging portion 511 and the second engaging portion 512 may be connected to the same surface of the supporting portion 52 away from the battery cell 20 . The first engaging portion 511 and the second engaging portion 512 may be independent of each other and not connected to each other. The first locking part 511 and the second locking part 512 can be respectively connected to one or more fixing parts 54 at one end facing the supporting part 52 . The first clamping portion 511 and the second clamping portion 512 may be connected to form a circular frame structure.

The second gap 510 may be a gap between the first engaging portion 511 and the second engaging portion 512 that are independent and not connected to each other. The second gap 510 may be a space within the circular frame structure. The second gap 510 exposes a partial surface of the signal part 42 accommodated in the receiving space 53 . The components in the battery pack or battery module for collecting the signal of the battery cell 21 can enter the accommodation space 53 through the second gap 510 , and then connect with the signal part 42 to collect the signal of the battery cell 21 .

Referring to FIG. 8 , optionally, the supporting part 52 includes a glue holding groove 520 , and the glue holding groove 520 is used for accommodating part of the adhesive when the supporting member 50 is bonded to the battery cell 21 .

In some embodiments of the present application, the support portion 53 may be bonded to the outer surface of the battery cell 21 . In order to prevent the adhesive (not shown in the figure) from overflowing from the contact area between the support portion 53 and the battery cell 21 , thereby affecting the safety performance of the battery cell 21 . Optionally, a glue-receiving groove 520 may be provided on the contact surface between the supporting portion 53 and the battery cell 21 . The glue holding groove 520 is used for holding part of the adhesive when the supporting part 53 is pressed against the battery cell 21 . The glue-holding groove 520 can be a through hole to facilitate processing and manufacturing. The glue-receiving groove 520 can also be a blind hole to prevent the adhesive from contacting the signal portion 42 .

Please refer to FIG. 9 . FIG. 9 is a schematic diagram of the dimensions of an end cap 211 provided by an embodiment of the present application. In some embodiments of the present application, optionally, the diameter of the sampling hole 210 is C, which satisfies C≤2mm.

Optionally, the minimum distance between the edge of the sampling hole 210 and the edge of the electrode terminal 211a is B, which satisfies 0.5 mm≤B≤1.5 mm.

Optionally, the depth of the sampling hole 210 is H, and the length of the electrode terminal 211a is L, satisfying 1/6*L≤H≤1/4*L.

Optionally, in some embodiments of the present application, each battery cell 21 includes two electrode terminals 211a respectively disposed at both ends. The electrode terminals 211a protrude from the end cover 211 . The electrode terminal 211a is provided with a sampling hole 210, which is in the shape of a semi-cylindrical cylinder, and the two sampling holes 210 connected after two adjacent electrode terminals 211a are abutted form a cylinder. The sampling pieces 40 are made of aluminum alloy, each sampling piece 40 includes 2 sampling pins 41 and 4 fixing holes 43 , and each electrode terminal 211a is provided with 2 sampling holes 210 . The sampling pin 41 is inserted into the sampling hole 210 and welded to the electrode terminal 211 a , and the signal part 42 is engaged with the supporting member 50 . The supporting member 50 is made of plastic and adhered to the outer surface of the main body 21 a of the battery cell 21 . A glue-receiving groove 520 is provided on the contact surface between the support portion 52 and the battery cell 21 . The support member 50 includes a first engaging portion 511 and a second engaging portion 512, the first engaging portion 511 is connected to two fixing portions 54, and the second engaging portion 512 is connected to two fixing portions 54, each The fixing 54 passes through a fixing hole 43 and is connected with the supporting portion 52 .

The second aspect of the present application provides an electrical device, including any battery 10 in the above-mentioned embodiments, and the battery 10 is used to provide electrical energy.

Please refer to FIG. 10 . FIG. 10 is a schematic diagram of a device 100 for preparing a battery according to the third aspect of the present application. The device 100 includes a first providing module 110 , a second providing module 120 and an installation module 130 . The first providing module 110 is used for providing at least two battery cells 21 . Among them, at least two battery cells 21 are arranged along the length direction L of the battery cells 21 and are electrically connected to each other. Each battery cell 21 includes a main body 21a and two electrode terminals 211a with opposite polarities. At both ends of the main body 21 a in the lengthwise direction, two electrode terminals 211 a protrude from the main body 21 a in a direction away from the inside of the battery cell 21 . Wherein, in the length direction L, a first gap 200 is formed between the main bodies 21a of two adjacent battery cells 21, and two adjacent electrode terminals 211a are oppositely arranged and abutted against each other. The holes 210 and the sampling holes 210 of the two contacting electrode terminals 211 a communicate with each other. The second providing module 120 is used to provide the sampling piece 40, the sampling piece 40 is connected to the electrode terminal 211a to collect the signal of the connected battery cell 21, wherein the sampling piece 40 includes a sampling pin 41 and a signal part 42: the sampling pin 41 At least part of it is inserted into the sampling hole 210 , the signal part 42 is located outside the first gap 200 and connected to the sampling pin 41 , and the signal part 42 is used to transmit the collected signal of the battery cell 21 . The installation module 130 is used for installing the sampling piece 40 on the battery cell 21 . Optionally, the sampling pin 41 is welded to the two abutting electrode terminals 211a.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. All of them should be covered by the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A battery, comprising a battery cell, the battery cell comprising:

At least two battery cells, the at least two battery cells are arranged along the length direction of the battery cells and electrically connected to each other, each battery cell includes a main body and two electrode terminals with opposite polarities, the two The electrode terminals are respectively provided at both ends of the main body along the length direction, and the two electrode terminals protrude from the main body in a direction away from the inside of the battery cell, wherein, in the length direction, adjacent A first gap is formed between the main bodies of the two battery cells, the two adjacent electrode terminals are oppositely arranged and abut against each other, the electrode terminals are provided with sampling holes, and the two abutting electrode terminals are provided with sampling holes. The sampling holes of the electrode terminals communicate with each other; and

A sampling piece, connected to the electrode terminal, for collecting signals from the connected battery cells, wherein the sampling piece includes:

a sampling pin at least partially inserted into the sampling hole; and

The signal part is located outside the first gap and connected to the sampling pin, and the signal part is used to transmit the collected signal of the battery cell.
The battery according to claim 1, wherein the battery unit further comprises a support member, the support member is located outside the first gap and connected to the battery cell, and the support member is used for connecting with the The signal part connects and supports the signal part.
The battery according to claim 2, wherein the support member comprises:

a clamping part, arranged at an end of the support member away from the battery cell, the clamping part is used for clamping with the signal part;

The supporting part is arranged at the other end of the supporting part, the supporting part is connected with the battery cell and used for supporting the signal part.
The battery according to claim 3, wherein an accommodation space is formed between the engaging portion and the supporting portion, and the accommodation space is used to accommodate the signal portion.
The battery of claim 3, wherein:

The signal part is provided with a fixing hole;

The supporting member includes a fixing part, one end of the fixing part is connected to the clamping part, and the other end is connected to the supporting part, and the fixing part is used to pass through the fixing hole so that the signal part and the card The joint is fixedly connected.
The battery according to claim 5, wherein the engaging part comprises:

a first clamping part and a second clamping part, the first clamping part and the second clamping part are connected to the same surface of the support part, and are respectively connected to opposite ends of the support part;

A second gap is formed between the first clamping portion and the second clamping portion, the second gap is used to expose part of the surface of the signal portion.
The battery according to claim 6, wherein the first engaging portion is connected to at least one of the fixing portions, and the second engaging portion is connected to at least one of the fixing portions.
The battery according to claim 3 , wherein the support part includes a glue-holding groove, and the glue-holding groove is used for accommodating part of the adhesive when the support member is bonded to the battery cell.
An electric device, comprising the battery according to any one of claims 1-8, the battery is used to provide electric energy.
A device for preparing a battery, comprising:

The first supply module is used to provide at least two battery cells, the at least two battery cells are arranged along the length direction of the battery cells and are electrically connected to each other, and each battery cell includes a main body and two opposite polarities. two electrode terminals, the two electrode terminals are respectively arranged at both ends of the main body along the length direction, and the two electrode terminals protrude from the main body in a direction away from the inside of the battery cell, wherein, in In the length direction, a first gap is formed between the main bodies of two adjacent battery cells, and the two adjacent electrode terminals are oppositely arranged and abutted against each other, and the electrode terminals are provided with Sampling holes, the sampling holes of the two abutting electrode terminals communicate with each other;

The second providing module is used to provide a sampling part, the sampling part is connected to the electrode terminal to collect the signal of the connected battery cell, wherein the sampling part includes a sampling pin and a signal part, the At least part of the sampling pin is inserted into the sampling hole; the signal part is located outside the first gap and connected to the sampling pin, and the signal part is used to transmit the collected signal of the battery cell;

The installation module is used for installing the sampling piece on the battery cell.