CN217114528U - Sampling assembly, battery and electric device - Google Patents

Abstract

The application provides a sampling subassembly, battery and power consumption device, this sampling subassembly include isolation parts and signal sampling part, and wherein, isolation parts have relative first face and the second face that sets up, and isolation parts's first face is used for the battery monomer of treating the sampling towards. The signal sampling component is arranged on the second surface of the isolation component and used for collecting the temperature or the voltage of the battery monomer. The isolation component can isolate the signal sampling component from the single battery to be sampled, when the single battery is out of control due to heat, the generated high-temperature gas is not easy to damage the signal sampling component, and then the risk of short circuit due to damage of the signal sampling component is avoided, so that the problem of battery safety caused by out of control due to heat of the single battery is solved.

Description

Sampling assembly, battery and electric device

Technical Field

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

Background

The battery generally includes a plurality of battery cells connected in series and parallel, and in order to ensure the safety performance of the battery, the states of the plurality of battery cells generally need to be monitored in real time, and therefore, a sampling assembly needs to be arranged to acquire the states of the plurality of battery cells. However, when thermal runaway occurs in the battery cell, high-temperature gas may be generated, and the high-temperature gas may damage the sampling assembly, thereby affecting the safety performance of the battery.

SUMMERY OF THE UTILITY MODEL

The application provides a sampling subassembly, battery and electric installation can solve the problem that the battery monomer damaged the sampling subassembly when thermal runaway effectively.

In a first aspect, the present application provides a sampling assembly comprising:

the battery pack comprises a separation component, a sampling component and a sampling component, wherein the separation component is provided with a first surface and a second surface which are oppositely arranged, and the first surface of the separation component is used for facing a battery cell to be sampled;

and the signal sampling component is arranged on the second surface of the isolation component and is used for acquiring the temperature or the voltage of the battery monomer.

Among the technical scheme of this application, the spacer member can keep apart signal sampling part and the battery monomer of treating the sampling, and when battery monomer took place the thermal runaway, produced high-temperature gas was not fragile signal sampling part, and then has avoided signal sampling part because the risk of damage emergence short circuit to solve the battery safety problem that leads to when battery monomer thermal runaway.

In some embodiments of the present application, the isolation component defines at least one opening, and the opening extends from the first surface to the second surface; the signal sampling component comprises a transmission piece for transmitting signals and a sampling terminal electrically connected with the transmission piece, and the sampling terminal is configured to penetrate through the opening and is used for being electrically connected with the electrode terminal of the battery cell. The opening that the separator was seted up can make the transmission piece of arranging in the separator second face pass this opening through the sampling terminal with the free electrode terminal electricity of battery with the battery monomer of orientation separator first face and be connected, avoids the transmission piece to stretch into the region at battery monomer place to produced high temperature gas can not influence the transmission piece when battery monomer takes place thermal runaway.

In some embodiments of the present application, the isolation component is provided with a plurality of the openings at intervals, and the plurality of the openings are arranged along the length direction of the transmission member. Such design makes transmission piece can collect the free temperature of a plurality of batteries in the battery or voltage through the sampling terminal, and then can let the battery have high capacity in the time, can also avoid the battery potential safety hazard that the transmission piece appears and damaged in the free thermal runaway of battery.

In some embodiments of the present application, the opening includes a first opening and a second opening provided in a width direction of the conveying member; the sampling terminals comprise a first sampling terminal and a second sampling terminal, the first sampling terminal is electrically connected to one side of the transmission piece, and the second sampling terminal is electrically connected to the other side of the transmission piece; the first sampling terminal is configured to pass through the first opening for electrically connecting one of the adjacent two battery cells; the second sampling terminal is configured to pass through the second opening for electrically connecting the other of the adjacent two of the battery cells. Such design not only can keep apart transmission piece and battery monomer, can also make things convenient for transmission piece and a plurality of battery monomer's electrode terminal to be connected.

In some embodiments of the present application, the second surface has at least one groove, and at least a portion of the transmission element of the signal sampling element is embedded in the groove. The provision of the recess enables the transmission member to be embedded therein, which saves battery space.

In some embodiments of the present application, the depth of the groove is greater than or equal to the thickness of the transmission member. The transmission piece can be completely embedded in the groove by the design, and the battery space is further saved.

In some embodiments of the application, the spacer member is provided with a fixing member for fixing the transmission member. The fixing piece can stably fix the transmission piece on the second surface of the isolation part, and the transmission piece is prevented from loosening in the transportation or use process to influence the service life of the battery.

In some embodiments of the present application, the fixing member includes a heat insulating portion covering a side of the transfer member away from the bottom wall of the groove. The fixing member includes a heat insulating portion capable of preventing high-temperature gas generated by thermal runaway of the battery cells from flowing to the second surface of the separator member to damage the transfer member.

In a second aspect, the present application provides a battery comprising:

an accommodating box;

a plurality of battery cells accommodated in the accommodating case;

the sampling assembly in any one of the above embodiments is located in the accommodating box, a first surface of an isolation component of the sampling assembly faces the plurality of battery cells, and a second surface of the isolation component faces away from the plurality of battery cells, and a signal sampling component of the sampling assembly is configured to be electrically connected with electrode terminals of the plurality of battery cells so as to acquire temperatures or voltages of the plurality of battery cells.

In the technical scheme of this application, the problem that the battery monomer damaged the sampling subassembly when thermal runaway can be solved effectively to the sampling subassembly of battery.

In some embodiments of the present application, the transmission member of the sampling assembly is located between two adjacent battery cells in a vertical projection of the plurality of battery cells. The design of transmission piece position can further prevent that battery cell from damaging the transmission piece when thermal runaway.

In some embodiments of the present application, the housings of the plurality of battery cells have a weakened area that faces the isolation member, and a perpendicular projection of the transmission member of the sampling assembly onto the plurality of battery cells does not coincide with the weakened area. Such a design can reduce when the battery monomer thermal runaway to the transmission piece on the perpendicular projection region injection high temperature gas on a plurality of battery monomers to further reduce the risk of damaging the transmission piece.

In some embodiments of the present application, the plurality of battery cells are cylindrical battery cells. The cylindrical battery monomer can reduce the contact area of the battery monomer, and is favorable for heat dissipation.

In some embodiments of the present application, a plurality of the battery cells are arranged in an axial direction of the battery cells, and electrode terminals are respectively disposed on opposite end faces of two adjacent battery cells; along the arrangement direction of the first surface and the second surface, an opening is arranged at a position of the isolation component corresponding to the electrode terminal, and the opening is used for electrically connecting the sampling terminal with the electrode terminal. Such a design can make things convenient for the transmission piece to be connected with a plurality of battery cell's electrode terminal.

In some embodiments of the present application, the battery cell includes an end surface and a side surface, the end surface is provided with the electrode terminal, and the isolation member covers the side surfaces of the plurality of battery cells. The isolation component is arranged to cover the side faces of the plurality of single batteries, so that on one hand, the sampling terminal can be conveniently connected with the electrode terminal of the single battery; on the other hand, a plurality of battery cells can be better fixed in the accommodating box.

In a third aspect, the present application provides an electric device, comprising a battery as described in any of the above embodiments, the battery being configured to provide electric energy.

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

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

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

fig. 2 is a schematic structural diagram of a battery provided in some embodiments of the present application;

fig. 3 is an exploded view of a battery provided in accordance with some embodiments of the present application;

fig. 4 is a schematic cross-sectional view of a battery according to some embodiments of the present disclosure;

FIG. 5 shows an enlarged view at A in FIG. 4;

fig. 6 is a schematic structural diagram of a battery cell provided in some embodiments of the present application;

fig. 7 is a cross-sectional view of a battery cell provided in accordance with some embodiments of the present application;

FIG. 8 is a schematic structural diagram of a sampling assembly provided in some embodiments of the present application;

fig. 9 is an exploded view of a sampling assembly provided in some embodiments of the present application.

The reference numbers in the detailed description are as follows:

1-a vehicle;

10-a battery;

11-a sampling assembly;

111-a spacer member;

1111-opening;

1111 a-a first opening;

1111 b-a second opening;

1112-a groove;

1113-fixing part;

112-a signal sampling component;

1121-transmission piece;

1122-sampling terminal;

1122 a-first sampling terminal;

1122 b-second sampling terminal;

12-a containment box;

121-a first portion;

122-a second portion;

13-a battery cell;

131-end cap;

1311-electrode terminals;

132-a housing;

1321-area of weakness;

133-electric core assembly;

20-a controller;

30-motor.

Detailed Description

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

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

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

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

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

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

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application fields of power batteries are more and more extensive, such as the fields of energy storage power systems, electric vehicles, military equipment, aerospace and the like, and therefore, the power batteries have become one of the hot spots of research.

The battery generally includes a plurality of battery cells connected in series and parallel, and in order to ensure the safety performance of the battery, the states of the plurality of battery cells generally need to be monitored in real time, so that the battery is generally provided with wiring harnesses for acquiring the operating parameters (such as temperature and voltage) of the battery cells, and the wiring harnesses are basically installed between adjacent battery cell shells. When thermal runaway of the battery cell occurs, the wire harness may be damaged, and a short circuit may be caused, thereby causing a safety problem of the battery.

In order to solve the problem that the wire harness is damaged by the battery monomer due to thermal runaway, the inventor researches and discovers that a sampling assembly can be arranged in the battery, the sampling assembly comprises an isolation component and a signal sampling component, and the isolation component is arranged between the battery monomer and the signal sampling component so as to block a channel for transmitting high heat generated when the battery monomer generates the thermal runaway to the signal sampling component, so that the signal sampling component can acquire working parameters such as the temperature and the voltage of the battery monomer and can not be damaged.

The battery cell disclosed in the present application may be used in an electric device such as a vehicle, a ship, or an aircraft, but not limited thereto, and a power supply system including the battery cell, the battery, or the like disclosed in the present application may be used.

The application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

For convenience of description, the following embodiments will be described by taking a vehicle 1 as an example of an electric device according to an embodiment of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1 according to some embodiments of the present disclosure. The vehicle 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The interior of the vehicle 1 is provided with a battery 10, and the battery 10 may be provided at the bottom or at the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, and for example, the battery 10 may serve as an operation power source of the vehicle 1. The vehicle 1 may further include a controller 20 and a motor 30, the controller 20 being configured to control the battery 10 to power the motor 30, for example, for start-up, navigation, and operational power requirements while the vehicle 1 is traveling.

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

Referring to fig. 2 to 5, the present application provides a battery 10, where the battery 10 includes a sampling assembly 11, a containing box 12 and a plurality of battery cells 13, where the containing box 12 is used to provide a containing space for the battery cells 13, and the containing box 12 may adopt various structures. Referring to fig. 3, in some embodiments, the accommodating box 12 may include a first portion 121 and a second portion 122, the first portion 121 and the second portion 122 cover each other, and the first portion 121 and the second portion 122 jointly define an accommodating space for accommodating the battery cell 13. The second portion 122 may be a hollow structure with an open end, the first portion 121 may be a plate-shaped structure, and the first portion 121 covers the open side of the second portion 122, so that the first portion 121 and the second portion 122 together define a receiving space. Of course, the accommodating case 12 formed by the first and second portions 121 and 122 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 10, the plurality of battery cells 13 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plurality of battery cells 13. The plurality of battery monomers 13 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 13 is accommodated in the accommodating box 12; of course, the battery may also be a battery module formed by connecting a plurality of battery cells 13 in series, in parallel, or in series-parallel, and a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a whole and accommodated in the accommodating box 12. The battery may also include other structures, for example, the battery 10 may also include a bus member for achieving electrical connection between the plurality of battery cells 13.

Wherein, each battery cell 13 can be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 13 may be cylindrical, flat, rectangular parallelepiped, or other shape.

The battery cell 13 is the smallest unit of the battery, and referring to fig. 6 and 7, the battery cell 13 includes an end cap 131, a housing 132, a battery cell assembly 133, and other functional components.

The end cap 131 refers to a member that covers an opening of the case 132 to isolate the internal environment of the battery cell 13 from the external environment. Without limitation, the shape of the end cap 131 may be adapted to the shape of the housing 132 to fit the housing 132. Alternatively, the end cap 131 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 131 is not easily deformed when being impacted, and thus the battery cell 13 may have a higher structural strength and safety. The end cap 131 may be provided with functional components such as the electrode terminal 1311, etc. The electrode terminal 1311 may be used to electrically connect with the electric core assembly 133 for outputting or inputting electric power of the battery cell 13. In some embodiments, the end cap 131 may further include a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 13 reaches a threshold value. The material of the end cap 131 may also be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this application. In some embodiments, insulation may also be provided on the inside of the end cap 131, which may be used to isolate the electrical connection components within the housing 132 from the end cap 131 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The housing 132 is an assembly for mating with the end cap 131 to form an internal environment of the battery cell 13, wherein the formed internal environment may be used to house the core assembly 133, electrolyte, and other components. The housing 132 and the end cap 131 may be separate components, and an opening may be formed in the housing 132, and the opening may be covered by the end cap 131 to form an internal environment of the battery cell 13. Without limitation, the end cap 131 and the housing 132 may be integrated, and specifically, the end cap 131 and the housing 132 may form a common connecting surface before other components are inserted into the housing, and when it is required to enclose the inside of the housing 132, the end cap 131 covers the housing 132. The housing 132 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 132 may be determined according to the specific shape and size of the electric core assembly 133. The material of the housing 132 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

The cell assembly 133 is a component in which electrochemical reactions occur in the battery cells 13. One or more electrical core assemblies 133 may be contained within housing 132. The core assembly 133 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the main body portion of the core assembly 133, and the portions of the positive and negative electrode tabs having no active material each constitute a tab. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected with the electrode terminals to form a current loop.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a sampling assembly according to some embodiments of the present disclosure. The sampling assembly 11 includes a separation member 111 and a signal sampling member 112, wherein the separation member 111 has a first surface and a second surface which are oppositely arranged, and the first surface of the separation member 111 is used for facing the battery cell 13 to be sampled. The signal sampling part 112 is disposed on the second surface of the isolation part 111, and the signal sampling part 112 is used for collecting the temperature or voltage of the battery cell 13.

The isolation component 111 may be a component having a plate-shaped structure, and has a first surface and a second surface arranged oppositely along the thickness direction, the first surface faces the battery cell 13, and the second surface faces the signal sampling component 112, so that the battery cell 13 and the signal sampling component 112 can be isolated, and thus, the signal sampling component 112 can be prevented from being damaged by high-temperature gas generated by the battery cell 13 during thermal runaway.

As can be seen from the above, the partition member 111 can block the flow of the high-temperature gas from the region facing the first surface to the region facing the second surface. In some embodiments of the present application, the isolation component 111 may also be made of a thermal insulation material to block heat from being conducted from the first surface to the second surface of the body, so that high heat generated by the battery cell 13 during thermal runaway can be further prevented from being conducted through the first surface to the second surface, and the signal sampling component is prevented from being damaged. As an example, the heat insulating material may be a foamed polystyrene plastic, a foamed polyurethane plastic, or the like, or may be a metal heat insulating material such as an aluminum foil.

The signal sampling component can collect working parameters such as temperature or voltage of the single battery 13, and then transmits the collected working parameters to the battery monitoring circuit through the connector, and the battery monitoring circuit is used for monitoring the state of the single battery 13.

The isolation component 111 in the sampling assembly 11 can isolate the signal sampling component 112 from the single battery 13 to be sampled, when the single battery 13 is out of thermal runaway, the isolation component 111 blocks the transmission of high heat or high-temperature gas generated by the single battery 13, and prevents the signal sampling component 112 from being damaged, thereby avoiding the risk of short circuit of the signal sampling component 112 due to damage, and realizing the problem of battery safety caused by the thermal runaway of the single battery.

Referring to fig. 8, in some embodiments of the present application, the isolation component 111 is provided with at least one opening 1111, the opening 1111 penetrates through the first surface to the second surface, and the signal sampling component 112 includes a transmission part 1121 for transmitting signals and a sampling terminal electrically connected to the transmission part 1121, and the sampling terminal is configured to penetrate through the opening 1111 for electrically connecting to an electrode terminal of the battery cell 13.

The above-mentioned opening 1111 is provided to facilitate the electrical connection of the signal sampling part 112 and the electrode terminal 1311 of the battery cell 13 to collect the temperature or voltage of the battery cell 13.

The transmission part 1121 of the signal sampling component 112 is generally a flexible wire harness, the flexible wire harness is electrically connected to the sampling terminal 1122, and the sampling terminal 1122 is electrically connected to the electrode terminal of the battery cell 13 through the opening 1111 formed in the isolation component 111, so that the temperature or the voltage of the battery cell 13 can be collected.

The sampling terminal 1122 is typically made of a metal conductive material, such as silver, copper, aluminum, nickel, or the like. The sampling terminal 1122 may be connected to the electrode terminal of the battery cell 13 through the opening 111 of the spacer member 111, or the sampling terminal 1122 may be electrically connected to the electrode terminal of the battery cell 13 through a connector inserted through the opening.

The opening 1111 formed in the isolation member 111 enables the transmission piece 1121 disposed on the second surface of the isolation member 111 and the single battery 13 facing the first surface of the isolation member 111 to pass through the opening 1111 through the sampling terminal 1122 to be electrically connected to the electrode terminal of the single battery 13, thereby preventing the transmission piece 1121 from extending into the region where the single battery 13 is located, and thus high-temperature gas generated when thermal runaway occurs in the single battery 13 does not affect the transmission piece 1121.

Referring to fig. 8, in some embodiments of the present disclosure, the separating component 111 is provided with a plurality of openings 1111 at intervals, and the plurality of openings 1111 are arranged along the length direction of the transmission member 1121.

The arrangement of the plurality of openings 1111 enables the transmission member 1121 to acquire the temperature or the voltage of the plurality of battery cells 13 in the battery 10 through the sampling terminal 1122, so that the battery 10 has high capacity and the potential safety hazard of the battery, which occurs when the transmission member 1121 is damaged by the thermal runaway of the battery cells 13, can be avoided.

Referring to fig. 9, in other embodiments of the present application, each of the openings 1111 may further include a first opening 1111a and a second opening 1111b disposed along a width direction of the transmission member 1121, the sampling terminals include a first sampling terminal 1122a and a second sampling terminal 1122b, the first sampling terminal 1122a is electrically connected to one side of the transmission member 1121, the second sampling terminal 1122b is electrically connected to the other side of the transmission member 1121, the first sampling terminal 1122a is configured to pass through the first opening 1111a for electrically connecting to one of the two adjacent battery cells 13, and the second sampling terminal 1122b is configured to pass through the second opening 1111b for electrically connecting to the other of the two adjacent battery cells 13.

The first opening 1111a and the second opening 1111b are spaced apart from each other on the isolation member 111, that is, the first opening 1111a and the second opening 1111b are not connected, so that the transmission member 1121 is positioned between the first opening 1111a and the second opening 1111b, and the isolation member 111 isolates the transmission member 1121 from the battery cell 13.

The first opening 1111a and the second opening 1111b are provided to isolate the transmission member 1121 from the battery cells 13 and facilitate connection of the transmission member 1121 to the electrode terminals of the plurality of battery cells 13.

In some embodiments of the present application, the first opening 1111a is shaped to fit the first sampling terminal 1122a, and the second opening 1111b is shaped to fit the second sampling terminal 1122 b. This prevents the high-temperature gas generated by thermal runaway of the battery cell 13 from flowing through the opening to the region facing the second surface of the isolation member 111, and further prevents the high-temperature gas from damaging the signal sampling member 112.

Referring to fig. 9, in some embodiments of the present disclosure, the second surface of the isolation component 111 is formed with at least one groove 1112, and at least a portion of the transmission element 1121 of the signal sampling component 112 is embedded in the groove 1112.

The groove 1112 refers to a groove recessed from the second surface of the isolation member 111, and the length and width of the groove 1112 can be designed according to the length and width of the transmission member 1121, so that part of the transmission member 1121 can be embedded in the groove 1112, the transmission member 1121 is prevented from being disposed in an area outside the groove 1112 to occupy the internal space of the battery 10, and the transmission member 1121 can be further facilitated to be fixed to the second surface of the isolation member 111.

Further, in some embodiments of the present application, the depth of the groove 1112 is greater than or equal to the thickness of the transmission member 1121.

The depth of the groove 1112 means a depth at the lowest position of the groove 1112 in a direction perpendicular to the second face of the separation member 111. Such a design allows the transmission member 1121 to be completely embedded in the groove 1112, further saving the internal space of the battery 10.

With continued reference to fig. 9, in some embodiments of the present application, the isolation component 111 is provided with a fixing member 1113, and the fixing member 1113 is used for fixing the transmission member 1121.

The fixing part 1113 can stably fix the transmission member 1121 on the second surface of the isolation member 111, so as to prevent the transmission member 1121 from loosening during transportation or use and affecting the service life of the battery 10.

In some of the above embodiments, the fixing member 1113 is not particularly limited as long as the transmission member 1121 can be fixed to the second surface of the isolation member 111. As an example, the solid member 1113 may be a solid glue by which the transmitting member 1121 may be fixed to the second face of the insulating member 111.

In addition, in some embodiments of the present application, the fixing member 1113 includes a heat insulation portion covering a side of the transmission member 1121 far from the bottom wall of the groove 1112.

In other embodiments of the present application, the thermal insulation portion may also be disposed on a side of the transmission piece 1121 close to the bottom wall of the groove 1112, and may also fill in a gap between a side wall of the groove 1112 and the transmission piece 1121.

The fixing member 1113 includes a heat insulating portion capable of preventing high-temperature gas generated by thermal runaway of the battery cells 13 from flowing to the second surface of the separation member 111 to damage the transmission member 1121.

In some of the above embodiments, the fixing part 1113 may include a fixing layer for fixing the transmission member 1121 and a heat insulating portion for preventing high-temperature gas generated by thermal runaway of the battery cells 13 from flowing to the second surface of the separation member 111 to damage the transmission member 1121, which are stacked. Wherein, the heat insulation part can be made of heat insulation materials such as foam polystyrene plastics, foam polyurethane plastics and the like.

In other embodiments of the present application, the fixing member 1113 may also be made of a heat-insulating glue, which can achieve the effects of fixing the transmission member 1121 and preventing heat conduction.

In some embodiments of the present application, the transmission member 1121 and the separation member 111 may be formed as a unitary structure by welding, which may facilitate the fabrication of the sampling assembly 11.

Referring to fig. 3 to 5, the battery 10 provided by the present application includes a sampling assembly 11, a containing box 12 and a plurality of battery cells 13, wherein the sampling assembly 11 is located in the containing box 12, a first surface of an isolation component 111 of the sampling assembly 11 faces the plurality of battery cells 13, a second surface of the isolation component 111 faces away from the plurality of battery cells 13, and a signal sampling component 112 of the sampling assembly 11 is configured to be electrically connected to electrode terminals of the plurality of battery cells 13 so as to collect temperatures or voltages of the plurality of battery cells 13.

Referring to fig. 4 and 5, in some embodiments of the present application, the transmission member 1121 of the sampling assembly 11 is located between two adjacent battery cells 13 in a vertical projection of the plurality of battery cells 13.

It is understood that the vertical projection of the transmission member 1121 on the plurality of battery cells 13 may be located between two adjacent battery cells 13, or may partially overlap with one or two of the two adjacent battery cells 13. This can further prevent the transmission members 1121 from being damaged by the battery cells 13 in the event of thermal runaway.

Referring to fig. 5, in some embodiments of the present application, the housing 132 of the plurality of battery cells 13 has a weak region 1321, the weak region 1321 faces the isolation member 111, and a perpendicular projection of the transmission member 1121 of the sampling assembly 11 on the plurality of battery cells 13 is not overlapped with the weak region 1321.

Battery monomer 13 can accumulate the heat in the use, and when the heat reached the threshold value, the inside high temperature gas that produces of battery monomer 13 can be discharged to battery monomer 13's outside through this weak region 1321 to reduce the inside heat accumulation and the deformation degree of battery monomer 13, and then can improve the security performance of battery by a wide margin. When the high-temperature gas is exhausted to the outside of the battery cells 13, in order to prevent the exhausted high-temperature gas from affecting the transmission members 1121, the vertical projection of the transmission members 1121 on the plurality of battery cells 13 is not overlapped with the weak regions 1321, so that the problem that the high-temperature gas is sprayed to the vertical projection regions of the transmission members 1121 on the plurality of battery cells 13 when the battery cells 13 are out of control due to heat can be reduced, and the risk of damaging the transmission members 1121 is further reduced.

In the embodiment of the present application, the shape of the battery cell 13 is not particularly limited, and may be a rectangular parallelepiped shape, a cylindrical shape, a hexagonal prism shape, or the like. Specifically, the shape of the battery cell 13 may be determined according to the actual application.

In some embodiments of the present application, the battery cell 13 is a cylindrical battery cell. The cylindrical battery cell can reduce the contact area of the battery cell 13, which is beneficial to heat dissipation.

In some embodiments of the present application, the battery cell 13 includes an end surface on which the electrode terminal is disposed and a side surface, and the separation member 111 covers the side surfaces of the plurality of battery cells 13. The separator 111 is provided to cover the side surfaces of the plurality of battery cells 13, and on the one hand, the sampling terminal 1122 can be easily connected to the electrode terminal of the battery cell 13. On the other hand, the plurality of battery cells 13 can be fixed more favorably in the housing case 12.

In some embodiments of the present application, the plurality of battery cells 13 are arranged in an axial direction of the battery cells 13, and electrode terminals are respectively disposed on opposite end surfaces of two adjacent battery cells 13. In the arrangement direction of the first and second surfaces, the position of the separation member 111 corresponding to the electrode terminal is provided with an opening 1111, and the opening 1111 is used to electrically connect the sampling terminal 1122 to the electrode terminal.

In addition, in other embodiments of the present application, a plurality of battery cells 13 may be arranged in a radial direction of the battery cells 13, and the end surfaces of two adjacent battery cells 13 are respectively provided with an electrode terminal. An opening 1111 is provided in the separator 111 at a position corresponding to the electrode terminal in the width direction of the transmission 1121, and the opening 1111 is used to electrically connect the sampling terminal 1122 to the electrode terminal.

In the above embodiment, the arrangement of the plurality of battery cells 13 and the opening 1111 of the isolation member 111 are configured to facilitate the connection of the transmission member 1121 with the electrode terminals of the plurality of battery cells 13.

The present application further provides an electric device, which includes the battery in any of the above embodiments, and the battery is used for providing electric energy for the electric device.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (15)

1. A sampling assembly, comprising:

the battery pack comprises a separation component, a sampling component and a sampling component, wherein the separation component is provided with a first surface and a second surface which are oppositely arranged, and the first surface of the separation component is used for facing a battery cell to be sampled;

and the signal sampling component is arranged on the second surface of the isolation component and is used for acquiring the temperature or the voltage of the battery monomer.

2. The sampling assembly of claim 1, wherein the spacer member defines at least one opening extending therethrough from the first face to the second face;

the signal sampling part comprises a transmission piece for transmitting signals and a sampling terminal electrically connected with the transmission piece, and the sampling terminal is configured to penetrate through the opening to be electrically connected with the electrode terminal of the battery cell.

3. The sampling assembly of claim 2, wherein the spacer member defines a plurality of spaced openings, the plurality of openings being arranged along a length of the transport member.

4. The sampling assembly of claim 2 or 3, wherein the opening comprises a first opening and a second opening disposed along a width direction of the transport member;

the sampling terminals comprise a first sampling terminal and a second sampling terminal, the first sampling terminal is electrically connected to one side of the transmission piece, and the second sampling terminal is electrically connected to the other side of the transmission piece;

the first sampling terminal is configured to pass through the first opening for electrically connecting one of the adjacent two battery cells; the second sampling terminal is configured to pass through the second opening for electrically connecting the other of the adjacent two of the battery cells.

5. The sampling assembly of claim 2, wherein the second surface defines at least one groove, and at least a portion of the transmission member of the signal sampling member is embedded in the groove.

6. The sampling assembly of claim 5, wherein the depth of the groove is greater than or equal to the thickness of the transmission member.

7. A sampling assembly according to claim 5 or 6, wherein the spacer member is provided with a fixing member for fixing the transport member.

8. The sampling assembly of claim 7, wherein the securing member includes a thermally insulating portion overlying a side of the transport member distal from the bottom wall of the recess.

9. A battery, comprising:

an accommodating box;

a plurality of battery cells accommodated in the accommodating case;

the sampling assembly of any one of claims 1-8, located within the housing box, a first side of an isolation member of the sampling assembly facing the plurality of battery cells and a second side of the isolation member facing away from the plurality of battery cells, a signal sampling member of the sampling assembly configured to electrically connect with electrode terminals of the plurality of battery cells to acquire a temperature or voltage of the plurality of battery cells.

10. The battery of claim 9, wherein the transmission member of the sampling assembly is located between two adjacent battery cells in a vertical projection of the plurality of battery cells.

11. The battery of claim 9 or 10, wherein the housings of the plurality of battery cells have a weakened area that faces the isolation member, and wherein a perpendicular projection of the transmission member of the sampling assembly onto the plurality of battery cells does not coincide with the weakened area.

12. The battery of claim 9, wherein the plurality of battery cells are cylindrical battery cells.

13. The battery according to claim 12, wherein a plurality of the battery cells are arranged in an axial direction of the battery cells, and electrode terminals are respectively disposed on opposite end faces of two adjacent battery cells;

the signal sampling component comprises a transmission piece for transmitting signals and a sampling terminal electrically connected with the transmission piece;

along the arrangement direction of the first surface and the second surface, an opening is arranged at a position of the isolation component corresponding to the electrode terminal, and the opening is used for electrically connecting the sampling terminal with the electrode terminal.

14. The battery according to claim 12 or 13, wherein the battery cell includes an end surface and a side surface, the end surface is provided with the electrode terminal, and the separation member covers the side surfaces of the plurality of battery cells.

15. An electrical device comprising a battery according to any of claims 9-14 for providing electrical energy.

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