CN219286615U

CN219286615U - Sampling device, battery and electric equipment

Info

Publication number: CN219286615U
Application number: CN202320681808.5U
Authority: CN
Inventors: 王宇; 甘卫锋
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-06-30
Anticipated expiration: 2033-03-31

Abstract

The application provides a sampling device, battery and consumer relates to the battery field. The sampling device comprises a sampling wire and a connector, wherein the sampling wire is provided with a connecting end and a sampling end, and the sampling end is used for connecting a piece to be sampled. The connector is connected to the connection end. The sampling wire comprises a fusing part, and the fusing part is positioned between the connecting end and the sampling end. The fusing part of the sampling device is arranged on the sampling lead, and the sampling lead can collect the electrical data of the part to be sampled and is connected to the main board through the connector. When the sampling wire has high current, the fusing part can fuse in time, so that the connector and the main board are protected from being ablated. Compared with the prior art that the fusing part is integrated on the main board, the space occupation of the main board can be reduced by arranging the fusing part on the sampling lead, the arrangement space of the fusing part is not needed to be considered when the main board circuit is designed, and the space utilization rate of the sampling device is improved. In addition, the sampling device is simple and convenient to manufacture and low in cost.

Description

Sampling device, battery and electric equipment

Technical Field

The application relates to the field of batteries, in particular to a sampling device, a battery and electric equipment.

Background

Batteries are widely applied in the field of new energy, such as electric automobiles, new energy automobiles and the like, and the new energy automobiles and the electric automobiles have become new development trends of automobile industry. In order to facilitate management of the battery, voltage and temperature acquisition needs to be performed on each battery cell in the battery through a sampling device. However, the sampling device in the related art has a low space utilization.

Disclosure of Invention

An object of the embodiment of the application is to provide a sampling device, a battery and electric equipment, which aim to solve the problem of low space utilization rate of the sampling device in the related art.

In a first aspect, an embodiment of the present application provides a sampling device, where the sampling device includes a sampling wire and a connector, the sampling wire has a connection end and a sampling end, and the sampling end is used to connect a piece to be sampled; the connector is connected to the connecting end; the sampling lead comprises a fusing part, and the fusing part is positioned between the connecting end and the sampling end.

In the above technical scheme, the fusing part of the sampling device is arranged on the sampling lead, and the sampling lead can collect the electrical data of the part to be sampled and is connected to the main board through the connector. When the sampling wire has high current, the fusing part can fuse in time, so that the connector and the main board are protected from being ablated. Compared with the prior art that the fusing part is integrated on the main board, the space occupation of the main board can be reduced by arranging the fusing part on the sampling lead, the arrangement space of the fusing part is not needed to be considered when the main board circuit is designed, and the space utilization rate of the sampling device is improved. In addition, the sampling device is simple and convenient to manufacture and low in cost.

As an optional solution of an embodiment of the present application, the fusing part includes a buffering part configured to be capable of buffering the expansion displacement of the member to be sampled.

In the above technical solution, the member to be sampled may expand with the increase of working time, and expansion displacement is generated. Through setting up the buffer, the inflation displacement of waiting to sample the piece to reduce sampling end and wait to sample the risk of piece connection failure, make sampling device can constantly wait to sample the electrical data of piece to gather. The buffer part is a part of the fuse part, that is, the buffer part has a fuse protection function. The fusing part not only realizes the fusing protection effect, but also has the buffer effect, and one part realizes a plurality of effects, thereby being beneficial to simplifying the structure of the sampling device and improving the space utilization rate.

As an optional technical solution of an embodiment of the present application, the sampling wire further includes a buffer portion configured to be capable of buffering expansion displacement of the member to be sampled; the buffer part is positioned between the fusing part and the connecting end; or the buffer part is positioned between the fusing part and the sampling end.

In the above technical solution, the member to be sampled may expand with the increase of working time, and expansion displacement is generated. Through setting up the buffer, the inflation displacement of waiting to sample the piece to reduce sampling end and wait to sample the risk of piece connection failure, make sampling device can constantly wait to sample the electrical data of piece to gather.

As an optional technical solution of the embodiment of the present application, the buffer portion is a bent structure.

In the above technical solution, the buffer portion is configured as a bent structure, so that the length of the buffer portion capable of buffering the expansion displacement is increased in a limited space. In addition, the buffer part is provided with a bending structure, and when the member to be sampled expands, the buffer part is easy to deform and stretch due to expansion force. In the embodiment that the fusing part includes the buffering portion, set up the buffering portion into the structure of buckling, can increase the length of fusing portion, make its resistance increase, when sampling wire appears the heavy current, because the buffering portion has great resistance, the heat generation is great to be fused easily and realize the fuse protection.

As an optional technical scheme of this application embodiment, the structure of buckling includes a plurality of straightway that connect gradually, two adjacent straightway is non-zero contained angle setting.

In the technical scheme, when the piece to be sampled generates expansion displacement, the buffer part deforms, and the included angle between two adjacent straight line segments can be enlarged or the bending structure is straightened, so that the expansion displacement of the piece to be sampled is buffered, and the risk of connection failure of the sampling end and the piece to be sampled is reduced.

As an optional technical solution of the embodiments of the present application, the bending structure includes a first winding section and a second winding section, one end of the first winding section is connected with one end of the second winding section, and the first winding section and the second winding section use a connection position thereof as a winding center to wind in the same direction.

In the technical scheme, the buffer part is wound in the same direction through the first winding section and the second winding section to form a bending structure, the bending structure is easy to deform, the deformation range is large, and the expansion displacement of the part to be sampled can be effectively buffered.

As an optional technical solution of this embodiment of the present application, the sampling wire has a sampling portion and a connecting portion that are connected to each other, one end of the sampling portion, which is far away from the connecting portion, forms the sampling end, one end of the connecting portion, which is far away from the sampling portion, forms the connecting end, and an extending direction of the sampling portion and an extending direction of the connecting portion form a non-zero included angle; wherein, the fusing part is located the connecting portion.

In the above technical scheme, with the fusing portion setting in connecting portion, when waiting to sample the piece and taking place the collision displacement, the fusing portion can cushion expansion displacement along the extending direction of connecting portion, and the expansion displacement's that can cushion distance is great, and the buffering effect is better.

As an optional technical solution of this embodiment of the present application, the cross-sectional area of the fusing part is smaller than the cross-sectional area of the connecting part at other positions except for the fusing part, and the cross-sectional area of the fusing part is smaller than the cross-sectional area of the sampling part.

In the above technical scheme, the cross-sectional area of the fusing part is reduced to increase the resistance of the fusing part, and when the sampling wire generates large current, the fusing part has large resistance and generates large heat, so that the fusing part is easily fused to realize fusing protection.

As an optional technical solution of this embodiment of the present application, an extension direction of the sampling portion is perpendicular to an extension direction of the connecting portion.

In the above technical scheme, the extending direction of the sampling part is perpendicular to the extending direction of the connecting part, so that the sampling end is connected with the to-be-sampled piece.

As an optional technical solution of this embodiment of the present application, the sampling device includes a plurality of sampling wires, a plurality of connection portions of the sampling wires are arranged along a first direction, and the sampling portion extends along the first direction.

In the technical scheme, the plurality of sampling wires are arranged, and the plurality of pieces to be sampled are subjected to electric data acquisition. Through making the connecting portion of a plurality of sampling wires arrange along first direction, sampling portion extends along first direction to the sampling end of every sampling wire of being convenient for is connected with waiting to sample the piece, and a plurality of sampling wires are arranged neatly uniformly simultaneously, in order to promote the utilization ratio to the space.

As an optional technical solution of this embodiment of the present application, the sampling wire has a sampling portion and a connecting portion that are connected to each other, one end of the sampling portion, which is far away from the connecting portion, forms the sampling end, one end of the connecting portion, which is far away from the sampling portion, forms the connecting end, and an extending direction of the sampling portion and an extending direction of the connecting portion form a non-zero included angle; wherein, the fusing part is located the sampling part.

In the above technical scheme, through setting up the portion of fusing in sampling portion, after the portion of fusing fuses, the remainder of sampling portion who is connected with waiting to sample is shorter, and the remainder is difficult for contacting with other structures under waiting to sample the support of piece, and damages other structures.

As an optional technical solution of this embodiment of the present application, the cross-sectional area of the fusing part is smaller than the cross-sectional area of the sampling part at other positions except for the fusing part, and the cross-sectional area of the fusing part is smaller than the cross-sectional area of the connecting part.

As an optional technical solution of the embodiment of the present application, the sampling device includes a plurality of sampling wires, and the connection ends of the plurality of sampling wires are all connected to the connector.

In the technical scheme, the plurality of sampling wires are arranged, and the plurality of pieces to be sampled are subjected to electric data acquisition.

As an optional technical solution of the embodiment of the present application, the sampling wire includes an insulating layer, and the insulating layer is wrapped on the outer side of the sampling wire.

In the technical scheme, the sampling wire is coated by the insulating layer, so that the sampling wire is insulated and isolated from other structures, and the risk of short circuit caused by contact of the sampling wire and other structures is reduced.

In a second aspect, an embodiment of the present application further provides a battery, where the battery includes a battery cell and the sampling device described above, and the sampling end is connected to the battery cell.

As an optional technical solution of the embodiments of the present application, the battery includes a bus member and a plurality of battery cells, the bus member is used for implementing a plurality of battery cell electrical connections, and the sampling end is connected to the bus member.

In the above technical scheme, the sampling end is connected to the battery cell through the converging piece to sample the electrical data of the battery cell.

In a second aspect, an embodiment of the present application further provides an electric device, including the battery, where the battery is configured to provide electric energy for the electric device.

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 will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

FIG. 2 is an exploded view of a battery provided in some embodiments of the present application;

FIG. 3 is an exploded view of a sampling device provided in some embodiments of the present application;

fig. 4 is a schematic structural diagram of a sampling device according to some embodiments of the present disclosure;

FIG. 5 is an enlarged view of the position A of FIG. 3;

FIG. 6 is a schematic view of a fuse structure according to other embodiments of the present disclosure;

FIG. 7 is an exploded view of a sampling device according to further embodiments of the present application;

FIG. 8 is a schematic structural diagram of a sampling device according to other embodiments of the present disclosure;

fig. 9 is an enlarged view of position B in fig. 7.

Icon: 10-a box body; 11-a first part; 12-a second part; 20-battery cells; 30-sampling means; 31-sampling wires; 311-connecting part; 3111-a connection end; 312-sampling part; 3121—sampling end; 313-fusing part; 3131—straight line segment; 3132—a first winding section; 3133-a second winding section; a 32-connector; 33-an insulating layer; 100-cell; 200-a controller; 300-motor; 1000-vehicle.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

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.

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

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and in the interest of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are illustrative only and should not be construed as limiting the present application in any way.

The term "plurality" as used herein refers to more than two (including two).

In the present application, the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells, or magnesium ion battery cells, and the embodiment of the present application is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. 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 pack battery cell are not limited thereto.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, 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 separation membrane. 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, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative 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 negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode lug. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive tabs is plural and stacked together, and the number of negative tabs is plural and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

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

The development of battery technology is to consider various design factors, such as battery life, energy density, discharge capacity, charge-discharge rate, and other performance parameters. In addition, the reliability of the battery needs to be considered. However, the reliability of the current battery is poor.

In order to improve the reliability of the battery, voltage and temperature acquisition needs to be performed on each battery cell in the battery through a sampling device. However, the sampling device in the related art has a low space utilization.

In order to improve the reliability of the battery, a fusing part is generally arranged on the sampling device, and the fusing part is used for fusing when the sampling device passes through a large current so as to play a role in protection. The fusing part in the related art is integrated on the main board, the arrangement space of the fusing part needs to be considered when the main board circuit is designed, the occupation of the main board space is increased due to the existence of the fusing part, and the space utilization rate is low.

In addition, the fusing part is integrated on the main board, so that the manufacturing difficulty and the manufacturing cost are improved.

In view of this, embodiments of the present application provide a sampling device including a sampling wire and a connector. The sampling wire is provided with a connecting end and a sampling end, the sampling end is used for connecting a piece to be sampled, and the connector is connected to the connecting end. The sampling wire comprises a fusing part, and the fusing part is positioned between the connecting end and the sampling end.

The fusing part of the sampling device is arranged on the sampling lead, and the sampling lead can collect the electrical data of the part to be sampled and is connected to the main board through the connector. When the sampling wire has high current, the fusing part can fuse in time, so that the connector and the main board are protected from being ablated. Compared with the prior art that the fusing part is integrated on the main board, the space occupation of the main board can be reduced by arranging the fusing part on the sampling lead, the arrangement space of the fusing part is not needed to be considered when the main board circuit is designed, and the space utilization rate of the sampling device is improved. In addition, the sampling device is simple and convenient to manufacture and low in cost.

The technical scheme described by the embodiment of the application is suitable for data acquisition of the piece to be sampled. The part to be sampled may be a battery cell or a battery. The data collected may be electrical data, such as voltage, temperature, etc.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. 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 description, the following embodiments take the electric device as the vehicle 1000 as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

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

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10.

Wherein each battery cell 20 may be a secondary battery cell or a primary battery cell; but not limited to, lithium sulfur battery cells, sodium ion battery cells, or magnesium ion battery cells. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3 and 4, fig. 3 is an exploded view of a sampling device 30 according to some embodiments of the present application. Fig. 4 is a schematic structural diagram of a sampling device 30 according to some embodiments of the present application. The embodiment of the application provides a sampling device 30, the sampling device 30 includes a sampling wire 31 and a connector 32, the sampling wire 31 has a connection end 3111 and a sampling end 3121, the sampling end 3121 is used for connecting a sample piece to be sampled, and the connector 32 is connected to the connection end 3111. Wherein the sampling wire 31 includes a fusing part 313, the fusing part 313 is located between the connection end 3111 and the sampling end 3121.

The sampling wire 31 is a member for collecting electrical data of the member to be sampled. Taking the sample to be sampled as the battery cell 20 as an example, the sampling wire 31 may be used to collect the voltage and/or temperature of the battery cell 20. The sampling wire 31 may be a copper wire, an aluminum wire, a silver wire, an alloy wire, or the like.

Along the extending direction of the sampling wire 31, two ends of the sampling wire 31 are a connection end 3111 and a sampling end 3121, respectively. Wherein the connection end 3111 is connected to the connector 32, and the sampling end 3121 is used for connection with a member to be sampled. For example, the sampling end 3121 may be welded to the sampling member such that the sampling wire 31 is fixed and electrically connected to the sampling member.

The connector 32 is a component for transmitting or transferring the electrical data collected by the sampling wire 31. The connector 32 may be fixedly connected to the connection end 3111 or may be detachably connected to the connection end 3111.

The fusing part 313 is a part of the sampling wire 31, and is a part of the sampling device 30 that plays a role of fusing protection. The fusing part 313 is located between the connection end 3111 and the sampling end 3121. The fusing part 313 is capable of fusing when the current passing therethrough is excessive, thereby disconnecting the connection terminal 3111 and the sampling terminal 3121, and performing a short-circuit protection or overload protection function. The melting point of the material of the fusing part 313 may be lower than the melting point of the material of the connection end 3111 and the sampling end 3121, so that it fuses due to excessive heat generation when a large current is passed. In addition, the resistance of the fusing part 313 may be made larger than the resistances of the connection terminal 3111 and the sampling terminal 3121, so that it can generate a large amount of heat to fuse itself when a large current is passed.

The fusing part 313 may be arranged on the sampling wire 31 by punching, etching or welding, and the process is simple.

The fusing part 313 of the sampling device 30 is disposed on the sampling wire 31, and the sampling wire 31 can collect the electrical data of the member to be sampled and is connected to the motherboard via the connector 32. When a large current occurs to the sampling wire 31, the fusing part 313 can be fused in time, so that the connector 32 and the main board are protected from being ablated. Compared with the prior art that the fusing part 313 is integrated on the main board, the arrangement of the fusing part 313 on the sampling wire 31 can reduce the space occupation of the main board, and the layout space of the fusing part 313 is not needed to be considered when the main board circuit is designed, so that the space utilization rate of the sampling device 30 is improved. In addition, the sampling device 30 is simple and convenient to manufacture and low in cost.

In some embodiments, the fusing part 313 includes a buffer part configured to be able to buffer an expansion displacement of the member to be sampled.

The fusing part 313 may be configured to be easily deformed so as to be elongated as the sample member expands when the sample member is subjected to expansion displacement, thereby buffering the expansion displacement of the sample member.

The buffer portion may be a part of the fuse portion 313 or may be the same member as the fuse portion 313.

The member to be sampled may expand with the increase of the working time, and expansion displacement is generated. By providing the buffer portion, the expansion displacement of the member to be sampled is buffered, so that the risk of connection failure between the sampling end 3121 and the member to be sampled is reduced, and the sampling device 30 can continuously collect the electrical data of the member to be sampled. The buffer portion is a part of the fuse portion 313, that is, the buffer portion also has a fuse protection function. The fusing part 313 has both a fusing protection function and a buffering function, and one part has a plurality of functions, which is advantageous to simplify the structure of the sampling device 30 and to improve the space utilization.

In other embodiments, the sampling wire 31 further includes a buffer portion configured to be able to buffer the expansion displacement of the member to be sampled. The buffer portion is located between the fusing part 313 and the connection end 3111. Or, the buffer portion is located between the fusing part 313 and the sampling end 3121.

The buffer portion may be configured to be easily deformed so as to be elongated with expansion of the member to be sampled when the member to be sampled is subjected to expansion displacement, thereby buffering the expansion displacement of the member to be sampled.

At this time, the buffer portion and the fuse portion 313 are two different portions. The buffer portion and the fusing portion 313 are sequentially arranged or spaced apart along the extension direction of the sampling wire 31.

The member to be sampled may expand with the increase of the working time, and expansion displacement is generated. By providing the buffer portion, the expansion displacement of the member to be sampled is buffered, so that the risk of connection failure between the sampling end 3121 and the member to be sampled is reduced, and the sampling device 30 can continuously collect the electrical data of the member to be sampled.

Referring to fig. 3, 4 and 5, fig. 5 is an enlarged view of the position a in fig. 3. In some embodiments, the buffer is a kink structure.

The bending structure refers to a structure extending along a curved track or a structure forming a bending angle between two adjacent portions. The bending structure can be arc-shaped, U-shaped, C-shaped, Z-shaped and the like.

The buffer part is arranged into a bending structure, so that the length of the buffer part capable of buffering expansion displacement is increased in a limited space. In addition, the buffer part is provided with a bending structure, and when the member to be sampled expands, the buffer part is easy to deform and stretch due to expansion force. In the embodiment in which the fusing part 313 includes the buffer part, the buffer part is provided in a bent structure, so that the length of the fusing part 313 can be increased, the resistance thereof can be increased, and when a large current occurs to the sampling wire 31, the fusing part has a large resistance, generates heat more, and is thus easily fused to realize the fusing protection.

Referring to fig. 3, 4 and 5, in some embodiments, the bending structure includes a plurality of straight segments 3131 connected in sequence, and two adjacent straight segments 3131 are disposed at a non-zero included angle.

The flexure mechanism includes a plurality of straight segments 3131 extending along a straight trajectory. The plurality of straight segments 3131 are connected in sequence. An included angle is formed between two adjacent straight line segments 3131, and the included angle can be an acute angle, a right angle or an obtuse angle.

Referring to fig. 5, in the embodiment shown in fig. 5, the bending structure includes four straight line segments 3131, and the four straight line segments 3131 are sequentially arranged along a predetermined direction. The four straight segments 3131 form a W-shaped bent structure.

When the sampling piece generates expansion displacement, the buffer part deforms, the included angle between two adjacent straight line segments 3131 can be enlarged or the bending structure is straightened, so that the expansion displacement of the sampling piece is buffered, and the risk of connection failure of the sampling end 3121 and the sampling piece is reduced.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a fusing part 313 according to other embodiments of the present disclosure. In other embodiments, the bending structure includes a first winding section 3132 and a second winding section 3133, with one end of the first winding section 3132 being connected to one end of the second winding section 3133. The first winding section 3132 and the second winding section 3133 are wound in the same direction with their connection positions as winding centers.

The first and second winding

sections

3132, 3133 each extend along a helical path. Both ends of the first winding section 3132 are connected to the second winding section 3133 and the sampling end 3121, respectively, and both ends of the second winding section 3133 are connected to the first winding section 3132 and the connection end 3111, respectively.

Referring to fig. 6, in the embodiment shown in fig. 6, the first winding section 3132 and the second winding section 3133 form an S-shaped bending structure.

The buffer part is wound in the same direction through the first winding section 3132 and the second winding section 3133 to form a bending structure, the bending structure is easy to deform, the deformation range is large, and the expansion displacement of the part to be sampled can be effectively buffered.

Referring to fig. 3, 4 and 5 again, in some embodiments, the sampling wire 31 has a sampling portion 312 and a connecting portion 311 connected to each other, wherein an end of the sampling portion 312 away from the connecting portion 311 forms a sampling end 3121, and an end of the connecting portion 311 away from the sampling portion 312 forms a connecting end 3111. The extending direction of the sampling portion 312 and the extending direction of the connecting portion 311 form a non-zero included angle. Wherein the fusing part 313 is located at the connection part 311.

The sampling portion 312 and the connecting portion 311 each extend along a straight trajectory. One end of the sampling portion 312 forms a sampling end 3121, the other end of the sampling portion 312 is connected to one end of the connection portion 311, and the other end of the connection portion 311 forms a connection end 3111.

The extending direction of the sampling portion 312 has an included angle with the extending direction of the connecting portion 311, and the included angle may be an acute angle or a right angle.

In this embodiment, the fusing part 313 is provided at the connection part 311, and is part of the connection part 311.

When the sample is collided and displaced, the fusing part 313 is arranged on the connecting part 311, the fusing part 313 can buffer expansion displacement along the extending direction of the connecting part 311, the buffer expansion displacement distance is larger, and the buffer effect is better.

In some embodiments, the cross-sectional area of the fusing part 313 is smaller than the cross-sectional area of the connecting part 311 at other positions than the fusing part 313, and the cross-sectional area of the fusing part 313 is smaller than the cross-sectional area of the sampling part 312.

The cross-sectional area of the fusing part 313 means: the fusing part 313 is cut off with a plane perpendicular to the extending direction of the fusing part 313, and the area of the cut plane is reduced. Similarly, the cross-sectional area of the connection portion 311 means: the connection portion 311 is truncated by a plane perpendicular to the extending direction of the connection portion 311, and the area of the truncated plane is reduced. The cross-sectional area of sampling portion 312 refers to: the sampling portion 312 is truncated by a plane perpendicular to the extending direction of the sampling portion 312, and the area of the truncated plane is reduced.

The fusing part 313 is a part of the connecting part 311 having the smallest cross-sectional area. The minimum cross-sectional area of the connection portion 311 at other positions than the fusing portion 313 is larger than the cross-sectional area of the fusing portion 313. In addition, the minimum cross-sectional area of sampling portion 312 is also greater than the cross-sectional area of fuse portion 313.

By reducing the cross-sectional area of the fusing part 313 to increase the resistance of the fusing part 313, when a large current occurs to the sampling wire 31, since the fusing part 313 has a large resistance, heat generation is large, and thus it is easily fused to realize fuse protection.

In some embodiments, the extending direction of the sampling portion 312 is perpendicular to the extending direction of the connecting portion 311.

The sampling end 3121 is connected to the member to be sampled by making the extending direction of the sampling portion 312 perpendicular to the extending direction of the connection portion 311.

Referring to fig. 3, 4 and 5 again, in some embodiments, the sampling device 30 includes a plurality of sampling wires 31, and the connection portions 311 of the plurality of sampling wires 31 are arranged along the first direction. The sampling portion 312 extends in a first direction.

The sampling device 30 may include one sampling wire 31, two sampling wires 31, three sampling wires 31, four sampling wires 31, or more than four sampling wires 31. Can be correspondingly arranged according to the number of the pieces to be sampled.

The first direction may be the C direction shown in fig. 3.

In this embodiment, the arrangement direction of the connection portions 311 of the plurality of sampling wires 31 is the same as the extending direction of the sampling portion 312.

By providing a plurality of sampling wires 31, electrical data collection is performed simultaneously for a plurality of pieces to be sampled. By arranging the connection portions 311 of the plurality of sampling wires 31 along the first direction, the sampling portions 312 extend along the first direction so that the sampling end 3121 of each sampling wire 31 is connected with the member to be sampled, and meanwhile, the plurality of sampling wires 31 are arranged in order to improve the utilization rate of space.

Referring to fig. 7, 8 and 9, fig. 7 is an exploded view of a sampling device 30 according to other embodiments of the present application. Fig. 8 is a schematic structural diagram of a sampling device 30 according to other embodiments of the present disclosure. Fig. 9 is an enlarged view of position B in fig. 7. In other embodiments, the sampling wire 31 has a sampling portion 312 and a connection portion 311 connected to each other, the end of the sampling portion 312 remote from the connection portion 311 forms a sampling end 3121, and the end of the connection portion 311 remote from the sampling portion 312 forms a connection end 3111. The extending direction of the sampling portion 312 and the extending direction of the connecting portion 311 form a non-zero included angle. Wherein the fusing part 313 is located at the sampling part 312.

In this embodiment, the fusing part 313 is provided in the sampling part 312, and is part of the sampling part 312.

By arranging the fusing part 313 at the sampling part 312, after the fusing part 313 fuses, the remaining part of the sampling part 312 connected with the member to be sampled is shorter, and the remaining part is not easy to contact with other structures to damage the other structures under the support of the member to be sampled.

In some embodiments, the cross-sectional area of the fusing part 313 is smaller than the cross-sectional area of the sampling part 312 at other positions than the fusing part 313, and the cross-sectional area of the fusing part 313 is smaller than the cross-sectional area of the connection part 311.

The fusing part 313 is a part of the sampling part 312 where the cross-sectional area is smallest. The minimum cross-sectional area of the sampling portion 312 at other positions than the fusing portion 313 is larger than the cross-sectional area of the fusing portion 313. In addition, the minimum cross-sectional area of the connection portion 311 is also larger than the cross-sectional area of the fusing portion 313.

Referring to fig. 7, 8 and 9, in some embodiments, the sampling device 30 includes a plurality of sampling wires 31, and connection ends 3111 of the plurality of sampling wires 31 are connected to the connector 32.

The plurality of sampling wires 31 share one connector 32, and the one connector 32 serves as a collecting end of the plurality of sampling wires 31.

By providing a plurality of sampling wires 31, electrical data collection is performed simultaneously for a plurality of pieces to be sampled.

Referring to fig. 7, 8 and 9, in some embodiments, the sampling wire 31 includes an insulating layer 33, and the insulating layer 33 is wrapped around the sampling wire 31.

The insulating layer 33 is made of a material having insulating properties, such as plastic or rubber. Alternatively, the insulating layer 33 may be a PI Film (Polyimide Film) or a PET Film (Polyester Film). The "coating the insulating layer 33 on the outer side of the sampling wire 31" includes two schemes that the insulating layer 33 completely coats the sampling wire 31 and that the insulating layer 33 partially coats the sampling wire 31.

The insulating layer 33 has an insulating function, and can insulate the sampling wire 31 from other components, thereby reducing the risk of short circuit caused by contact of the sampling wire 31 with other components. In addition, the insulating layer 33 is used for coating the sampling wire 31, so that the sampling wire 31 can be protected, and the risk of damage to the sampling wire 31 is reduced.

The embodiment of the present application further provides a battery 100, where the battery 100 includes the battery cell 20 and the sampling device 30 described above, and the sampling end 3121 is connected to the battery cell 20.

In some embodiments, the battery 100 includes a bus bar for making electrical connection with the plurality of battery cells 20 and the plurality of battery cells 20. The sampling end 3121 is connected to the manifold.

The bus bar is a member for achieving electrical connection between the plurality of battery cells 20. The manifold may be welded to the plurality of battery cells 20 and the sampling end 3121 may be welded to the manifold such that the sampling member is indirectly connected to the battery cells 20 through the manifold.

The sampling end 3121 is connected to the battery cell 20 through a bus bar to sample electrical data of the battery cell 20.

The embodiment of the application also provides electric equipment, which comprises the battery 100, wherein the battery 100 is used for providing electric energy for the electric equipment.

According to some embodiments of the present application, please refer to fig. 3-9.

The embodiment of the application provides a sampling device 30, the sampling device 30 comprises a sampling wire 31 and a connector 32. The sampling wire 31 has a connection end 3111 and a sampling end 3121, the sampling end 3121 being used for connecting a sample piece to be sampled; the connector 32 is connected to the connection end 3111. Wherein the sampling wire 31 includes a fusing part 313, the fusing part 313 is located between the connection end 3111 and the sampling end 3121. The fusing part 313 of the sampling device 30 is disposed on the sampling wire 31, and the sampling wire 31 can collect the electrical data of the member to be sampled and is connected to the motherboard via the connector 32. When a large current occurs to the sampling wire 31, the fusing part 313 can be fused in time, so that the connector 32 and the main board are protected from being ablated. Compared with the prior art that the fusing part 313 is integrated on the main board, the arrangement of the fusing part 313 on the sampling wire 31 can reduce the space occupation of the main board, and the layout space of the fusing part 313 is not needed to be considered when the main board circuit is designed, so that the space utilization rate of the sampling device 30 is improved. In addition, the sampling device 30 is simple and convenient to manufacture and low in cost.

The fusing part 313 includes a buffer part configured to be able to buffer an expansion displacement of the member to be sampled. The member to be sampled may expand with the increase of the working time, and expansion displacement is generated. By providing the buffer portion, the expansion displacement of the member to be sampled is buffered, so that the risk of connection failure between the sampling end 3121 and the member to be sampled is reduced, and the sampling device 30 can continuously collect the electrical data of the member to be sampled. The buffer portion is a part of the fuse portion 313, that is, the buffer portion also has a fuse protection function. The fusing part 313 has both a fusing protection function and a buffering function, and one part has a plurality of functions, which is advantageous to simplify the structure of the sampling device 30 and to improve the space utilization.

The fusing part 313 may have an S shape, a W shape, a C shape, or the like. The fusing part 313 is set to be S-shaped, W-shaped or C-shaped, so that deformation is easy to occur, the deformation range is large, and expansion displacement of a piece to be sampled can be effectively buffered.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A sampling device, comprising:

the sampling wire is provided with a connecting end and a sampling end, and the sampling end is used for connecting a piece to be sampled;

a connector connected to the connection end;

the sampling lead comprises a fusing part, and the fusing part is positioned between the connecting end and the sampling end.

2. The sampling device of claim 1, wherein the fusing portion comprises a buffer portion configured to buffer an expansion displacement of the member to be sampled.

3. The sampling device of claim 1, wherein the sampling wire further comprises a buffer configured to buffer an expansion displacement of the member to be sampled;

the buffer part is positioned between the fusing part and the connecting end; or the buffer part is positioned between the fusing part and the sampling end.

4. A sampling device according to claim 2 or 3, wherein the buffer portion is of a bent configuration.

5. The sampling device of claim 4, wherein the bending structure comprises a plurality of straight line segments connected in sequence, and two adjacent straight line segments are arranged at a non-zero included angle.

6. The sampling device of claim 4, wherein the bending structure comprises a first winding section and a second winding section, wherein one end of the first winding section is connected with one end of the second winding section, and the first winding section and the second winding section are wound in the same direction by taking the connection position as a winding center.

7. A sampling device according to any one of claims 1 to 3, wherein the sampling wire has a sampling portion and a connecting portion connected to each other, an end of the sampling portion remote from the connecting portion forming the sampling end, an end of the connecting portion remote from the sampling portion forming the connecting end, and an extending direction of the sampling portion being disposed at a non-zero angle to an extending direction of the connecting portion;

wherein, the fusing part is located the connecting portion.

8. The sampling device of claim 7, wherein the cross-sectional area of the fusing part is smaller than the cross-sectional area of the connecting part at other positions than the fusing part, and the cross-sectional area of the fusing part is smaller than the cross-sectional area of the sampling part.

9. The sampling device of claim 7, wherein the sampling portion extends in a direction perpendicular to the direction of extension of the connecting portion.

10. The sampling device of claim 7, wherein the sampling device comprises a plurality of the sampling wires, the connection portions of the plurality of sampling wires being arranged along a first direction, the sampling portions extending along the first direction.

11. A sampling device according to any one of claims 1 to 3, wherein the sampling wire has a sampling portion and a connecting portion connected to each other, an end of the sampling portion remote from the connecting portion forming the sampling end, an end of the connecting portion remote from the sampling portion forming the connecting end, and an extending direction of the sampling portion being disposed at a non-zero angle to an extending direction of the connecting portion;

wherein, the fusing part is located the sampling part.

12. The sampling device of claim 11, wherein the cross-sectional area of the fusing portion is smaller than the cross-sectional area of the sampling portion at other locations than the fusing portion, and the cross-sectional area of the fusing portion is smaller than the cross-sectional area of the connecting portion.

13. A sampling device according to any one of claims 1 to 3, wherein said sampling device comprises a plurality of said sampling wires, said connection ends of said plurality of sampling wires each being connected to said connector.

14. A sampling device according to any one of claims 1 to 3, wherein the sampling wire comprises an insulating layer which is wrapped around the outside of the sampling wire.

15. A battery, comprising:

a battery cell;

the sampling device of any one of claims 1-14, the sampling end being connected to the battery cell.

16. The battery of claim 15, wherein the battery comprises a buss member and a plurality of the battery cells, the buss member being configured to electrically connect the plurality of the battery cells, the sampling end being connected to the buss member.

17. A powered device comprising a battery as claimed in claim 15 or 16, the battery being arranged to provide electrical energy to the powered device.