Battery and electric device

Abstract

The utility model discloses a battery and an electric device. The battery includes: a battery cell having a case on which an electrode connection portion is provided; and a bus member which is electrically connected to the electrode connection part. The sampling assembly comprises a first detection element and a second detection element, the first detection element is connected to the shell and is configured to detect the temperature of the shell, and the second detection element is configured to detect the temperature of the shell; the second detection element is bonded to the electrode connection portion and / or the bus bar and is configured to detect a temperature of the electrode connection portion and / or the bus bar accordingly.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] Power battery temperature sampling is crucial to the life and performance of power batteries. With the increasing demand for high-rate fast charging, the requirements for the accuracy of sampling points in characterizing battery cell temperature are also getting higher and higher. In the existing technology, a single battery cell temperature sampling point is often used to characterize the battery temperature. This processing method is easily affected by the heat generated by conductive mechanical parts as the fast charging rate increases, and the sampling point cannot accurately characterize the actual internal temperature of the battery cell. Utility Model Content

[0004] In view of the above problems, the present application provides a battery and an electrical device to overcome the above problems existing in the prior art.

[0005] An object of the present application is to provide a battery and an electrical device, which can accurately characterize the actual internal temperature of a battery cell by adopting multi-point sampling.

[0006] In a first aspect, the present application provides a battery, comprising:

[0007] A battery cell, the battery cell having a housing, on which an electrode connection portion is provided; and

[0008] A busbar, the busbar being electrically connected to the electrode connecting portion;

[0009] A sampling assembly, the sampling assembly comprising a first detection element and a second detection element, the first detection element being coupled to the shell and configured to detect the temperature of the shell, the second detection element being coupled to the electrode connection portion and / or the busbar and correspondingly configured to detect the temperature of the electrode connection portion and / or the busbar.

[0010] By using different detection elements to detect the temperature at different locations on the battery cell, that is, the first detection element detects the temperature of the shell, and the second detection element detects the temperature of the electrode connection part and / or the busbar, the temperature at different locations on the battery cell can be obtained, so that the temperature deviation can be corrected to obtain a measurement value close to the actual internal temperature of the battery cell. Especially in the case of fast charging and large-surface cooling, the temperature deviation between the detection element and the inside of the battery cell may be as high as 8°C to 9°C. By adding sampling points and calibrating the mathematical model, the temperature sampling accuracy can be controlled within ±3°C, significantly improving the temperature sampling accuracy.

[0011] In some embodiments of the battery, the battery includes a battery cell group, the battery cell group includes a plurality of battery cells arranged in groups along a first direction, and the first detection element and the second detection element of the sampling assembly are coupled to the same battery cell group.

[0012] By coupling the first detection element and the second detection element of the sampling assembly to the same battery cell group, the temperature at different positions on the single battery cell group can be accurately acquired, thereby ultimately improving the accuracy of temperature sampling of the single battery cell group.

[0013] In some embodiments of the battery, the first detection element and the second detection element are bonded to the same battery cell.

[0014] In some embodiments of the battery, the first detection element is bonded to the housing of one battery cell, and the second detection element is bonded to the electrode connection portion and / or the busbar of another battery cell.

[0015] In some embodiments of the battery, the battery cell includes a first surface, the electrode connecting portion and the current bus are located on the first surface, and the first detection element and the second detection element are both disposed on the first surface.

[0016] In some battery embodiments, the battery cell includes a first surface and a second surface that are not coplanar, the electrode connection portion and the busbar are located on the first surface, the first detection element is disposed on the second surface, and the second detection element is disposed on the first surface.

[0017] By respectively detecting the temperatures of positions on different surfaces of the battery cell through the first detection element and the second detection element of the sampling assembly, the distance between the temperature sampling points can be increased, the interference between the temperature sampling points can be reduced, and the accuracy of temperature sampling can be improved.

[0018] In some battery embodiments, the second surface of the battery cell faces another battery cell, a heat insulating member is provided on the side of the second surface facing another battery cell, and the first detection element is provided between the second surface and the heat insulating member.

[0019] By arranging the detection element at the heat insulating member, the influence of the adjacent battery cells on the battery cell to be measured can be reduced, so that a more accurate actual battery cell temperature can be obtained.

[0020] In some battery embodiments, the battery cell further includes a third surface on which a thermal management component is arranged, which can more truly and accurately reflect the effect of the thermal management component on the thermal management of the battery cell, and is conducive to obtaining the actual temperature of the battery cell after thermal management.

[0021] In some embodiments of the battery, the first detection element is bonded to a middle region of the second surface.

[0022] In some embodiments of the battery, the battery includes a battery cell group, the battery cell group includes a plurality of battery cells arranged in groups along a first direction, the battery cells further include a third surface, and the first direction is perpendicular to the third surface.

[0023] In some battery embodiments, the sampling assembly includes a plurality of the first detection elements and a plurality of the second detection elements to correspondingly detect the temperatures of a plurality of battery cells arranged side by side, which is beneficial for detecting temperature anomalies of the battery cells and discovering problems in a timely manner.

[0024] In a second aspect, the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0025] By sampling the temperature at different parts of the battery cell, the temperature rise of the conductive mechanical parts can be fed back in time when a large current passes through the battery cell, triggering the temperature correction mathematical model and making timely corrections to the surface temperature of the battery cell shell, thereby correctly representing the actual temperature of the battery.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0028] Figure 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0029] Figure 2 is a schematic diagram of an exploded structure of a battery according to some embodiments of the present application;

[0030] Figure 3 is a cross-sectional view of a battery according to some embodiments of the present application;

[0031] Figure 4 for Figure 3 an enlarged view of a portion of;

[0032] Figure 5 is a schematic diagram of several battery cells arranged side by side in a battery according to some embodiments of the present application;

[0033] Figure 6 is a schematic diagram of a battery cell according to some embodiments of the present application;

[0034] Figure 7 is a perspective view of several battery cells arranged side by side in a battery according to some embodiments of the present application;

[0035] Figure 8 is a top view of several battery cells arranged side by side in a battery according to some embodiments of the present application;

[0036] Fig. 9 is a perspective view of several battery cells arranged side by side in a battery according to some embodiments of the present application; and

[0037] Fig.10 is a front view of several battery cells arranged side by side in a battery according to some embodiments of the present application;

[0038] The reference numerals in the specific implementation manner are as follows:

[0039] Vehicles 1000;

[0040] Battery 100, controller 200, motor 300;

[0041] Box body 10, first part 11, second part 12;

[0042] Battery cell 20, electrode connection part 21a, busbar 21b, housing 22;

[0043] Sampling component 30, first detection element 31, second detection element 32;

[0044] A first surface 41, a second surface 42, and a third surface 43;

[0045] Thermal management component 51 and thermal insulation component 52 . DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B, which may indicate the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0055] Power battery temperature sampling is crucial to the life and performance of power batteries. With the increasing demand for high-rate fast charging, the requirements for the accuracy of sampling points in characterizing battery cell temperature are also getting higher and higher. In the existing technology, a single battery cell temperature sampling point is often used to characterize the battery temperature. As the fast charging rate increases, this processing method is easily affected by the heat generated by conductive mechanical parts. The sampling point cannot characterize the actual internal temperature of the battery cell, and the deviation can reach 8~9°C, which seriously affects the performance of the battery.

[0056] In this case, the present application considers sampling the temperature at multiple locations on the battery cell to obtain the temperatures at different locations, solve the problem of excessive deviation in the temperature measurement of the battery cell, and improve the accuracy of temperature sampling.

[0057] Specifically, the present application proposes to perform temperature sampling at different representative positions of the battery cell, such as performing temperature sampling at the end cover of the battery cell, and performing temperature sampling at the shell or electrical connector of the battery cell at the same time. In this way, the temperature at different positions of the battery cell is obtained, and the temperature deviation is corrected to obtain a measurement value close to the actual internal temperature of the battery cell.

[0058] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery disclosed in the present application can be used to form the electrical device, which is conducive to improving the stability of battery performance and battery life.

[0059] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0060] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0061] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0062] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0063] Please refer to Figure 2 , Figure 2An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0064] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0065] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0066] For the convenience of description and for the sake of clarity, the coordinate system XYZ is indicated in the relevant drawings below, where X represents the width direction of the battery cell 20, which can also be called the first direction or the lateral direction, Y represents the length direction of the battery cell 20, which can also be called the second direction or the longitudinal direction, and Z represents the height direction of the battery cell 20, which can also be called the third direction or the vertical direction.

[0067] The following describes in detail the battery 100 according to some embodiments of the present application with specific reference to the accompanying drawings, in the hope that those skilled in the art can fully understand the concepts and principles of the present application.

[0068] According to some embodiments of the present application, a battery 100 is provided, which may include: a battery cell 20, the battery cell 20 having a shell 22, on which an electrode connecting portion 21a is provided; and a busbar 21b, which is electrically connected to the electrode connecting portion 21a; a sampling component 30, the sampling component 30 may include a first detection element 31 and a second detection element 32, the first detection element 31 may be coupled to the shell 22 and configured to detect the temperature of the shell 22, and the second detection element 32 may be coupled to the electrode connecting portion 21a and / or the busbar 21b and correspondingly configured to detect the temperature of the electrode connecting portion 21a and / or the busbar 21b.

[0069] like Figure 2 As shown, the battery 100 may include a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The number of battery cells 20 in each battery 100 may be one or more. In the illustrated embodiment, an example of a battery 100 including multiple battery cells 20 is shown. Those skilled in the art will understand that the following description is also applicable to the case where a battery 100 includes a single battery cell 20, unless otherwise explicitly stated. The battery cells 20 may be arranged in the case 10 in various suitable ways. For example, for square shell battery cells, the large faces or small faces of the battery cells may be arranged in rows adjacent to each other, and then multiple rows of battery cells may be arranged side by side. For blade battery cells, the large faces of the battery cells may be arranged side by side adjacent to each other.

[0070] Figure 3 shows a cross-sectional view of a battery 100 according to some embodiments of the present application, Figure 4 Shows Figure 3 An enlarged view of a portion of the . Figure 5 An embodiment is shown in which a plurality of battery cells 20 are arranged side by side in a manner that the large surfaces are adjacent to each other. Figure 6 A schematic diagram of a single battery cell 20 is shown. Figure 7 and Figure 8 A perspective view and a top view of a plurality of battery cells 20 from another angle are shown respectively. Figures 3 to 8 As shown, the battery cell 20 includes a shell 22, a battery cell assembly and other functional components. The shell 22 is used to form the internal space of the battery cell 20, and the internal space formed can be used to accommodate the battery cell assembly, electrolyte and other components. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0071] Functional components such as an electrode connection portion 21a may be provided on the housing 22. The electrode connection portion 21a may be used to electrically connect to the battery cell assembly to output or input the electric energy of the battery cell 20. The battery cell 20 may further include a busbar 21b, which may be electrically connected to the electrode connection portion 21a, thereby outputting or inputting the electric energy of the battery cell 20 through the electrode connection portion 21a and the busbar 21b.

[0072] like Figure 3 and Figure 4 As shown, the battery 100 may include a sampling component 30. According to an embodiment of the present application, the sampling component 30 may be configured to sample the temperature of the battery cell 20. Generally, during the use of the battery 100, it may be necessary to sample various other parameters of the battery cell 20, such as pressure, voltage, current, etc. Therefore, the sampling component 30 may be an integrated sampling component for sampling various parameters of the battery cell 20. Of course, those skilled in the art will understand that the sampling component 30 may also be a separate component for measuring temperature, which is set separately from the sampling components for measuring other parameters. According to an embodiment of the present application, the sampling component 30 may include detection elements for measuring the temperatures of two different positions of the battery cell 20, namely a first detection element 31 and a second detection element 32.

[0073] The first detection element 31 can be coupled to the shell 22 and configured to detect the temperature of the shell 22. The first detection element 31 can adopt any suitable temperature measuring element in the art, such as a negative temperature coefficient thermistor (NTC). The first detection element 31 is coupled to the shell 22 so as to be able to measure the temperature of the shell 22. Here, "engagement" refers to the first detection element 31 being associated with the shell 22 for temperature measurement, including various coupling methods such as connection, contact, attachment, attachment, coupling, etc. For example, in the case where the first detection element 31 adopts a negative temperature coefficient thermistor, the sampling end of the first detection element 31 can be in contact with the shell 22 to measure the temperature of the surface of the shell 22. The first detection element 31 can be connected to the main body of the sampling component 30 so as to transmit the detected temperature information. Figure 4 As shown, the first detection element 31 is coupled to the main body of the sampling assembly 30 , while the sampling end of the first detection element 31 is engaged to the housing 22 of the battery cell 20 .

[0074] The second detection element 32 can be bonded to the electrode connection part 21a and / or the busbar 21b and is configured to detect the temperature of the electrode connection part 21a and / or the busbar 21b accordingly. The second detection element 32 can adopt any suitable temperature measuring element in the art, such as a negative temperature coefficient thermistor. The second detection element 32 can be bonded to the electrode connection part 21a and / or the busbar 21b so as to be able to measure the temperature of the electrode connection part 21a and / or the busbar 21b. Similarly, here, "bonding" refers to the second detection element 32 being associated with the electrode connection part 21a and / or the busbar 21b for temperature measurement, including various bonding methods such as connection, contact, attachment, attachment, coupling, etc. For example, in the case where the second detection element 32 adopts a negative temperature coefficient thermistor, the sampling end of the second detection element 32 can be in contact with the electrode connection part 21a and / or the busbar 21b, thereby measuring the temperature of the surface of the electrode connection part 21a and / or the busbar 21b. The second detection element 32 can be connected to the main body of the sampling assembly 30 to transmit the detected temperature information. Figure 5 As shown, the second detection element 32 is coupled to the main body of the sampling assembly 30 , while the sampling end of the second detection element 32 is coupled to the electrode connection portion 21 a and / or the busbar 21 b of the battery cell 20 .

[0075] exist Figures 6 to 10 In the diagram, for convenience and clarity, the detection element is schematically represented by a dot, which can also indicate that the detection element is connected to the battery cell at this position. Those skilled in the art should understand that such a diagram is only schematic, and the connection relationship between the detection element and the battery cell can adopt the above-mentioned connection method or any other suitable method known in the art.

[0076] When simulating and calculating the temperature inside a battery cell through different heat transfer paths (inside the battery cell - casing, inside the battery cell - electrode connection, inside the battery cell - electrode connection - busbar), different paths will produce different error values ​​due to the influence of environmental factors. The result obtained by approximating the true value through multi-path simulation will be more accurate.

[0077] In the embodiments of the present application, by using different detection elements to detect the temperature at different positions on the battery cell, that is, the first detection element detects the temperature of the shell, and the second detection element detects the temperature of the electrode connection part and / or the busbar, the temperature at different parts of the battery cell can be obtained, so that the temperature deviation can be corrected to obtain a measurement value close to the actual internal temperature of the battery cell. Especially in the case of fast charging and large-surface cooling, the temperature deviation between the detection element and the inside of the battery cell may be as high as 8°C to 9°C, and by adding sampling points and calibrating the mathematical model, the temperature sampling accuracy can be controlled within ±3°C, significantly improving the temperature sampling accuracy.

[0078] According to some embodiments of the present application, the battery 100 may include a battery cell group 110 , which may include a plurality of battery cells 20 arranged in groups along a first direction, and the first detection element 31 and the second detection element 32 of the sampling assembly 30 may be coupled to the same battery cell group 110 .

[0079] In the case 10 of the battery 100, the battery cells 20 may be arranged in various ways. In some embodiments, the battery 100 may include one or more battery cell groups 110, such as Figure 3 As shown, the battery 100 includes two battery cell groups 110, and the two battery cell groups 110 are arranged side by side. Those skilled in the art will appreciate that the battery 100 may include any number of battery cell groups 110 according to actual application and design requirements. Figure 5 As shown, the battery cell group 110 may include a plurality of battery cells 20 arranged in groups along a first direction (ie, X direction). The battery cells 20 are arranged side by side in a manner of being adjacent to each other on a large surface to form the battery cell group 110 .

[0080] The first detection element 31 and the second detection element 32 of the sampling assembly 30 can be connected to the same battery cell group 110, so that the sampling assembly 30 detects the temperature of the same battery cell group 110. The first detection element 31 and the second detection element 32 can be respectively connected to different battery cells 20 of the same battery cell group 110 to respectively measure the temperatures of different positions on different battery cells 20 of the same battery cell group 110, or can be respectively connected to the same battery cell 20 to detect the temperature of different positions on a single battery cell.

[0081] By coupling the first detection element 31 and the second detection element 32 of the sampling assembly 30 to the same battery cell group 110 , the temperature at different positions on a single battery cell group can be accurately acquired, thereby ultimately improving the accuracy of temperature sampling of a single battery cell group.

[0082] According to some embodiments of the present application, the first detection element 31 and the second detection element 32 are coupled to the same battery cell 20 .

[0083] When the first detection element 31 and the second detection element 32 are joined to the same battery cell 20, the first detection element 31 is joined to the shell 22 of the battery cell 20 and is used to detect the temperature of the shell 22 of the battery cell 20, and the second detection element 32 is joined to the electrode connecting portion 21a and / or the bus 21b of the battery cell 20 and is used to detect the temperature of the electrode connecting portion 21a and / or the bus 21b of the battery cell 20.

[0084] According to some embodiments of the present application, the first sensing element 31 is coupled to the housing 22 of one battery cell 20 , and the second sensing element 32 is coupled to the electrode connecting portion 21 a and / or the busbar of another battery cell 20 .

[0085] The first detection element 31 and the second detection element 32 can be respectively joined to different battery cells 20 of the same battery cell group 110 to respectively measure the temperatures at different positions on different battery cells 20. For example, the first detection element 31 can be joined to the shell 22 of one battery cell 20, and the second detection element 32 can be joined to the electrode connection portion 21a and / or the busbar 21b of another battery cell 20 of the same battery cell group 110.

[0086] According to some embodiments of the present application, the battery cell 20 may include a first surface 41 , the electrode connection portion 21 a and the busbar 21 b may be located on the first surface 41 , and the first detection element 31 and the second detection element 32 may both be disposed on the first surface 41 .

[0087] like Figure 6 As shown, the battery cell 20 may include a first surface 41, and the electrode connection portion 21a and the busbar 21b may be located on the first surface 41. Figure 6 In the figure, the electrode connection part 21a is not visible because it is covered by the busbar 21b. The second detection element 32 can be arranged on the first surface 41, and connected to the electrode connection part 21a and / or the busbar 21b on the first surface 41 to detect the temperature of the electrode connection part 21a and / or the busbar 21b. The first detection element 31 can also be arranged on the first surface 41, and connected to the housing 22 of the battery cell 20 on the first surface 41 to detect the temperature of the housing 22 at the first surface 41.

[0088] According to some embodiments of the present application, the battery cell 20 may include a first surface 41 and a second surface 42 that are not coplanar, the electrode connection portion and the busbar may be located on the first surface 41 , the first detection element 31 may be disposed on the second surface 42 , and the second detection element 32 may be disposed on the first surface 41 .

[0089] like Figure 6As shown, the battery cell 20 may include a first face 41, and the electrode connection portion 21a and the busbar 21b may be located on the first face 41. The second detection element 32 may be disposed on the first face 41, and bonded to the electrode connection portion 21a and / or the busbar 21b located on the first face 41 to detect the temperature of the electrode connection portion 21a and / or the busbar 21b. The battery cell 20 may also include a second face 42 that is not coplanar with the first face 41, and the first detection element 31 may be disposed on the second face 42, and bonded to the housing 22 of the battery cell 20 on the second face 42 to detect the temperature of the housing 22 at the second face 42. It should be understood by those skilled in the art that although in the illustrated embodiment, the second face 42 is marked on a small face, in this embodiment, the second face 42 may also be a large face, as long as it is not coplanar with the first face 41 where the electrode connection portion 21a and the busbar 21b are located, and the illustration is only for illustrating various embodiments and is not restrictive.

[0090] By respectively detecting the temperatures of the battery cells at different positions on the surfaces through the first detection element 31 and the second detection element 32 of the sampling assembly 30, the distance between the temperature sampling points can be increased, the interference between the temperature sampling points can be reduced, and the accuracy of the temperature sampling can be improved.

[0091] According to some embodiments of the present application, the second side 42 of the battery cell 20 may face another battery cell 20 , a heat insulating member 52 may be provided on the side of the second side 42 facing another battery cell 20 , and the first detection element 31 may be provided between the second side 42 and the heat insulating member 52 .

[0092] like Figure 7 and Figure 8 As shown, in some embodiments, a heat insulator 52 may be provided between adjacent second faces 42 of adjacent battery cells 20, that is, a heat insulator 52 is provided between the small faces of two battery cells facing each other. The heat insulator 52 can be used to isolate the heat transfer between adjacent battery cells 20 and prevent the battery cells 20 from being affected by the heat of the adjacent battery cells 20. When the heat insulator 52 is provided, the first detection element 31 can be joined to the housing 22 at the second face 42 between the second face 42 and the heat insulator 52, so as to detect the temperature of the small face of the housing 22.

[0093] By arranging the detection element at the heat insulating member, the influence of the adjacent battery cells on the battery cell to be measured can be reduced, so that a more accurate actual battery cell temperature can be obtained.

[0094] According to some embodiments of the present application, the battery cell 20 may further include a third surface 43 , and a thermal management component 51 may be arranged on the third surface 43 .

[0095] In some embodiments, the first detection element 31 can be joined to the housing 22 at a position on the second surface 42 close to the thermal management component 51. In this case, the first detection element 31 is not arranged on the third surface 43, and therefore does not directly face or contact the thermal management component 51, which can reduce the influence of the thermal management component 51 on temperature detection. At the same time, the first detection element 31 is close to the thermal management component 51 on the second surface 42, which can more truly and accurately reflect the effect of the thermal management component 51 on the thermal management of the battery cell 20, which is conducive to obtaining the actual temperature of the battery cell after thermal management.

[0096] According to some embodiments of the present application, the first detection element 31 may be bonded to a middle region of the second surface 42 .

[0097] For a blade battery cell, its length is usually more than twice its height. Fig. 9 and Fig.10 A perspective view and a front view of an embodiment of a blade battery cell are shown respectively. Fig. 9 and Fig.10 In the figure, for the sake of clarity, several battery cells in the middle of the multiple blade battery cells arranged side by side are removed to clearly show the arrangement of the detection element. Fig. 9 and Fig.10 As shown, the first detection element 31 can be bonded to the middle area of ​​the second surface 42 , where the middle area refers to the area where the first detection element 31 is located between the edges on the second surface 42 and is spaced apart from the edges to reduce the impact on temperature sampling.

[0098] According to some embodiments of the present application, the battery 100 may include a battery cell group 110 , which may include a plurality of battery cells 20 arranged in groups along a first direction. The battery cells 20 may further include a third surface 43 , and the first direction is perpendicular to the third surface 43 .

[0099] like Fig. 9 and Fig.10 As shown, the battery cell group 110 may include a plurality of battery cells 20 arranged in a group along a first direction (i.e., the X direction), and these battery cells 20 are arranged side by side with their large surfaces adjacent to each other to form the battery cell group 110. The battery cells 20 may also include a third surface 43, and the first direction is perpendicular to the third surface 43, so that the battery cells 20 are arranged side by side with the third surface 43 adjacent to each other. In this case, the detection element may not be provided on the third surface 43.

[0100] According to some embodiments of the present application, the sampling assembly 30 may include a plurality of first detection elements 31 and a plurality of second detection elements 32 , where the plurality of first detection elements 31 and the plurality of second detection elements 32 are used to detect the temperatures of a plurality of battery cells 20 arranged side by side.

[0101] The sampling component 30 includes multiple first detection elements 31 and multiple second detection elements 32, which can sample the temperatures of multiple battery cells 20. These detection elements can be evenly distributed, for example, to obtain the overall temperature distribution of multiple battery cells 20 in the battery 100, which is conducive to detecting temperature anomalies of the battery cells 20 and discovering problems in time.

[0102] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery described in any of the above schemes, and the battery is used to provide electrical energy to the electrical device.

[0103] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0104] According to the embodiments of the present application, by performing temperature sampling on different parts of the battery cell, the temperature rise can be fed back in time by sampling the temperature of the conductive mechanical parts when a large current passes through the battery cell, thereby triggering a temperature correction mathematical model and making timely corrections to the surface temperature of the battery cell shell, thereby correctly representing the actual temperature of the battery.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: The battery (100) comprises: A battery cell (20), the battery cell (20) having a housing (22), an electrode connection portion (21a) being provided on the housing (22); and A busbar (21b), the busbar (21b) being electrically connected to the electrode connecting portion (21a); A sampling assembly (30), the sampling assembly (30) comprising a first detection element (31) and a second detection element (32), the first detection element (31) being coupled to the housing (22) and being configured to detect the temperature of the housing (22), the second detection element (32) being coupled to the electrode connection portion (21a) and / or the busbar (21b) and being correspondingly configured to detect the temperature of the electrode connection portion (21a) and / or the busbar (21b).

2. The battery according to claim 1, characterized in that The battery (100) comprises a battery cell group (110), wherein the battery cell group (110) comprises a plurality of battery cells (20) arranged in a group along a first direction, and the first detection element (31) and the second detection element (32) of the sampling assembly (30) are connected to the same battery cell group (110).

3. The battery according to claim 2, characterized in that The first detection element (31) and the second detection element (32) are joined to the same battery cell (20).

4. The battery according to claim 2, characterized in that The first detection element (31) is joined to the housing (22) of one battery cell (20), and the second detection element (32) is joined to the electrode connection portion (21a) and / or the busbar (21b) of another battery cell (20).

5. The battery according to claim 1, characterized in that The battery cell (20) comprises a first surface (41), the electrode connecting portion (21a) and the current collector (21b) are located on the first surface (41), and the first detection element (31) and the second detection element (32) are both arranged on the first surface (41).

6. The battery according to claim 1, characterized in that The battery cell (20) comprises a first surface (41) and a second surface (42) that are not coplanar, the electrode connection portion (21a) and the current collector (21b) are located on the first surface (41), the first detection element (31) is arranged on the second surface (42), and the second detection element (32) is arranged on the first surface (41).

7. The battery according to claim 6, characterized in that The second surface (42) of the battery cell (20) faces another battery cell (20), a heat insulating member (52) is provided on the side of the second surface (42) facing another battery cell (20), and the first detection element (31) is provided between the second surface (42) and the heat insulating member (52).

8. The battery according to claim 6, characterized in that The battery cell (20) further comprises a third surface (43), on which a heat management component (51) is arranged.

9. The battery according to claim 6, characterized in that The first detection element (31) is joined to a central region of the second surface (42).

10. The battery according to claim 1, characterized in that The battery (100) comprises a battery cell group (110), the battery cell group (110) comprising a plurality of battery cells (20) arranged in a group along a first direction, the battery cells (20) further comprising a third surface (43), the first direction being perpendicular to the third surface (43).

11. The battery according to claim 1, characterized in that The sampling assembly (30) comprises a plurality of the first detection elements (31) and a plurality of the second detection elements (32), wherein the plurality of the first detection elements (31) and the plurality of the second detection elements (32) are used to detect the temperature of a plurality of battery cells (20) arranged side by side.

12. An electrical device, characterized in that: The electrical device comprises a battery according to any one of claims 1 to 11, and the battery (100) is used to provide electrical energy.

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