Battery, battery device and electric equipment

Abstract

The utility model discloses a battery, a battery device and electric equipment, the battery comprises a battery cell, the battery cell comprises a pole piece, and the pole piece comprises a dressing part and an empty foil part; and the temperature sensing piece is arranged at the empty foil part. According to the battery, the battery device and the electric equipment, the temperature of the battery cell can be accurately measured, and the capacity and the service life of the battery cell are not influenced.

Description

Technical Field

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

[0002] Lithium batteries have the advantages of high voltage, high specific energy, many cycles and long storage time. They are widely used not only in portable electronic devices (such as mobile phones, digital cameras and laptops), but also in large and medium-sized electric equipment such as electric vehicles, electric bicycles and power tools.

[0003] The internal structure of a lithium battery is mainly composed of positive and negative electrodes and a separator. The battery will generate a large amount of heat during use, affecting its cycle life and safety, especially for large-capacity batteries. Real-time monitoring of internal temperature changes of lithium batteries can most directly and effectively judge the battery health.

[0004] At present, the commonly used solution is to set a temperature sensor inside the battery cell, and the sensor extends into the middle part of the battery cell. This solution has a significant impact on the original structure of the battery, causing stress concentration and hindering the migration of lithium ions, affecting the electrochemical performance and life of the battery.

[0005] Therefore, improvements are needed to at least partially solve the above problems. Utility Model Content

[0006] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0007] In order to at least partially solve the above problems, according to a first aspect of the present invention, a battery is provided, comprising:

[0008] A battery cell, the battery cell comprising a pole piece, the pole piece comprising a dressing portion and a hollow foil portion;

[0009] A temperature sensing component is arranged on the empty foil portion.

[0010] Exemplarily, the battery cell includes multiple layers of hollow foil portions along the thickness direction thereof;

[0011] One temperature sensing component is provided for every preset number of layers of the empty foil portion, wherein the preset number is greater than or equal to zero.

[0012] Exemplarily, the battery further comprises a shell, the battery cell is arranged inside the shell, a pole is arranged on the shell, a lead-out piece is arranged inside the shell, and the lead-out piece is conductively connected to the pole and the hollow foil portion.

[0013] Exemplarily, the lead-out member includes a lead-out plate and a connecting plate, one end of the lead-out plate is conductively connected to the pole, and the other end of the lead-out plate is conductively connected to the empty foil portion through the connecting plate.

[0014] Exemplarily, the temperature sensing component and the lead-out component are spaced apart from each other.

[0015] Exemplarily, the battery further includes a container, a signal transmission device and a connecting wire;

[0016] The receiving member is located inside the housing and connected to the housing, and has a receiving space inside the receiving member, or the receiving member and the housing together form a receiving space;

[0017] The signal transmission component is accommodated in the accommodation space, the first end of the connection line passes through the accommodation component and is connected to the signal transmission component, and the second end of the connection line is connected to the temperature sensing component.

[0018] Exemplarily, a through hole is provided on the receiving member, and the first end of the connecting line passes through the through hole to be connected to the signal transmission device;

[0019] The connecting line is sealed and connected to the perforation.

[0020] Exemplarily, the housing includes a shell and a cover plate, the shell and the cover plate together form an accommodating space, and the battery cell, the container, the signal transmission device and the connecting wire are located in the accommodating space;

[0021] The receiving member is connected to the cover plate, and a liquid injection hole is also provided on the cover plate, wherein the receiving member and the liquid injection hole are located at two opposite ends of the cover plate.

[0022] Exemplarily, the receiving member is connected to the cover plate by means of a hot melt connection or a snap connection.

[0023] Exemplarily, the signal transmission device includes a wireless signal transmitter.

[0024] Exemplarily, the battery further includes an insulating film, the insulating film covers the temperature sensing element, and the insulating film is adhered to the empty foil portion.

[0025] Exemplarily, the battery cell is a wound battery cell or a stacked battery cell.

[0026] Exemplarily, the temperature sensing element is a thermistor or a thermocouple.

[0027] Exemplarily, the electrode sheet includes a negative electrode sheet and a positive electrode sheet, the negative electrode sheet includes a first dressing portion and a first empty foil portion, and the positive electrode sheet includes a second dressing portion and a second empty foil portion;

[0028] The temperature sensing component is arranged on the first hollow foil portion and / or the second hollow foil portion.

[0029] According to a second aspect of the present invention, a battery device is provided, which includes the battery as described above.

[0030] According to a third aspect of the utility model, an electrical device is provided, which includes the battery device or the battery as described above.

[0031] According to the battery, battery device and electrical equipment of the utility model, by arranging the temperature sensing element on the hollow foil portion of the electrode, on the one hand, the temperature change inside the battery cell can be timely and accurately obtained, and on the other hand, the direct contact between the temperature sensing element and the dressing causing excessive local stress and resulting in lithium precipitation is avoided. The temperature sensing element will not hinder the migration of lithium ions in the electrochemical reaction process, and the impact on the capacity and life of the battery can be significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following drawings of the present application are hereby used as part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, and are used to explain the device and principle of the present application. In the drawings,

[0033] Figure 1 is a schematic structural diagram of a battery according to an embodiment of the present application;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure of the negative electrode cover plate;

[0035] Figure 3 for Figure 1 A schematic cross-sectional view of a battery in FIG.

[0036] Figure 4 for Figure 3 A schematic diagram of the location of the temperature sensing element;

[0037] Figure 5 for Figure 4 Schematic diagram of the positional relationship between the negative electrode sheet, the temperature sensing element and the first connecting sheet.

[0038] Description of reference numerals:

[0039] 100-shell, 110-shell, 120-negative electrode cover, 121-negative electrode column, 122-first lead-out plate, 123-receiving member, 124-liquid injection hole, 200-battery cell, 210-negative electrode sheet, 211-first dressing part, 212-first empty foil part, 220-positive electrode sheet, 300-temperature sensing element, 400-first connecting sheet, 500-second connecting sheet, 600-connecting wire. DETAILED DESCRIPTION

[0040] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0041] It should be understood that the present application can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present application to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0042] It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer or part discussed below can be represented as a second element, component, region, layer or part.

[0043] Spatially relative terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein for convenience of description to describe the relationship of one element or feature to other elements or features shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation shown in the figures.

[0044] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0045] Embodiments of the utility model are described herein with reference to cross-sectional views as schematic diagrams of ideal embodiments (and intermediate structures) of the present application. In this way, variations in the shapes shown due to, for example, manufacturing techniques and / or tolerances can be expected. Therefore, the embodiments of the present application should not be limited to the specific shapes shown herein, but include shape deviations due to, for example, manufacturing. Therefore, what is shown in the figures is schematic in nature, and their shapes are not intended to display the actual shape of the device and are not intended to limit the scope of the present application.

[0046] See attached Figure 1-5 The battery according to an embodiment of the present application is exemplarily described, and the battery includes a housing 100, a battery cell 200, and a temperature sensing element 300. The battery of the present application can be a lithium-ion battery, a nano-ion battery, or other batteries with the same structure.

[0047] The battery cell 200 is arranged inside the housing 100, and the battery cell 200 includes pole pieces (negative pole piece 210 and positive pole piece 220), and the pole piece includes a dressing part and a hollow foil part. Specifically, the battery cell 200 includes a negative pole piece 210, a separator and a positive pole piece 220, and the positive pole piece 220 and the negative pole piece 210 are separated by the separator. Among them, the battery cell 200 can be a wound battery cell or a laminated battery cell. A laminated battery cell is a battery cell in which the positive and negative pole pieces 210 and the separator are cut into a specified size, and then the positive pole piece 220, the separator and the negative pole piece 210 are stacked into a small battery cell monomer, and then the small battery cell monomers are stacked and connected in parallel to form a large battery cell; a wound battery cell is a battery cell formed by fixing the stripped pole piece on a winding needle and continuously winding the positive pole piece 220, the negative pole piece 210 and the separator as the winding needle rotates.

[0048] See attached Figure 5The negative electrode sheet 210 includes a first dressing portion 211 and a first empty foil portion 212. Specifically, the negative electrode sheet 210 includes a negative electrode current collector and a negative electrode dressing coated on both sides of the negative electrode current collector. The negative electrode current collector may be a copper foil, and the negative electrode dressing generally includes an active material, a binder, and a conductive agent. The portion of the negative electrode sheet 210 coated with the negative electrode dressing is the first dressing portion 211, which includes the negative electrode current collector and the negative electrode dressing on both sides of the negative electrode current collector; the portion of the negative electrode sheet 210 not coated with the negative electrode dressing is the first empty foil portion 212, which is located at the end of the negative electrode sheet 210 and only includes the negative electrode current collector. See the attached Figure 4 The width of the first dressing portion 211 is D1, and the width of the first hollow foil portion 212 is D2.

[0049] The positive electrode sheet 220 includes a second dressing portion and a second empty foil portion. Specifically, the positive electrode sheet 220 includes a positive electrode collector and a positive electrode dressing coated on both sides of the positive electrode collector. The positive electrode collector can be an aluminum foil, and the positive electrode dressing generally includes an active material, a binder, and a conductive agent. The portion of the positive electrode sheet 220 coated with the positive electrode dressing is the second dressing portion, which includes the positive electrode collector and the positive electrode dressing on both sides of the positive electrode collector; the portion of the positive electrode sheet 220 not coated with the positive electrode dressing is the second empty foil portion, which is located at the end of the positive electrode sheet 220 and only includes the positive electrode collector. In the present embodiment, the first empty foil portion 212 and the second empty foil portion are respectively located at opposite ends of the battery cell 200. See the attached Figure 4 , the width of the second dressing part is D3, the width of the second empty foil part is D4, the width of the separator is D5, and the total width of the battery cell 200 is D6. For safety reasons, the width of the negative electrode dressing will be greater than the width of the positive electrode dressing, and the width of the separator is greater than the width of the negative electrode dressing. The overall size order is as follows: the total width D6 of the battery cell 200> the width D5 of the separator> the width D1 of the first dressing part 211> the width D3 of the second dressing part.

[0050] The temperature sensing element 300 is arranged at the empty foil portion (the second empty foil portion and / or the second empty foil portion) to detect the temperature of the empty foil portion. On the one hand, since the empty foil portion is a current collector and has good thermal conductivity, the temperature sensing element 300 is arranged here so that the temperature change inside the battery cell 200 can be obtained more timely and accurately; on the other hand, since there is no dressing at the empty foil portion, the temperature sensing element 300 will not be in direct contact with the dressing, thereby avoiding the possibility of the temperature sensing element 300 piercing the diaphragm and causing the battery cell 200 to short-circuit. At the same time, the temperature sensing element 300 is avoided from directly contacting the dressing to cause excessive local stress and lithium precipitation. The temperature sensing element 300 will not hinder the migration of lithium ions during the electrochemical reaction, which can significantly reduce the impact on the capacity and life of the battery.

[0051] In this embodiment, the temperature sensing member 300 is disposed at the first empty foil portion 212 to detect the temperature at the first empty foil portion 212, that is, the temperature of the negative electrode current collector. In some embodiments, the temperature sensing member 300 may be disposed at the second empty foil portion to detect the temperature at the second empty foil portion, that is, the temperature of the positive electrode current collector. In some embodiments, the temperature sensing member 300 may be disposed at both the first empty foil portion 212 and the second empty foil portion.

[0052] In this embodiment, the battery cell 200 includes multiple layers of first empty foil portions 212 and multiple layers of second empty foil portions along the thickness direction. When the battery cell 200 is a wound battery cell, the thickness direction is its radial direction; when the battery cell 200 is a laminated battery cell, the thickness direction is its stacking direction, that is, the direction perpendicular to the electrode sheet. Exemplarily, a temperature sensing component 300 is provided at each first preset number of layers of the first empty foil portion 212, and the first preset number is greater than or equal to 0, so that the temperature change of different layers of the negative electrode sheet 210 can be obtained in a timely and accurate manner. It should be noted that when the first preset number is 0, a temperature sensing component 300 is provided at each layer of the first empty foil portion 212; when the first preset number is 1, a temperature sensing component 300 is provided at each layer of the first empty foil portion 212, for example, when there are a total of 5 layers of the first empty foil portion 212, a temperature sensing component 300 is provided at each of the first, third, and fifth layers of the first empty foil portion 212. In some embodiments, a temperature sensing component 300 is disposed at every second preset number of second empty foil portions, and the second preset number is greater than or equal to zero.

[0053] In the present embodiment, the housing 100 includes a housing 110 and a cover plate, and the housing 110 and the cover plate together form a storage space. Among them, the cover plate includes a negative electrode cover plate 120 and a positive electrode cover plate, and the housing 110 is in a hollow cylindrical shape. The negative electrode cover plate 120 and the positive electrode cover plate are respectively connected to the two ends of the housing 110, and together with the housing 110, a storage space is formed, and the battery cell 200 is located in the storage space, that is, located inside the housing 100. The negative electrode cover plate 120 is provided with a negative electrode pole 121 and a liquid injection hole 124 connected to the storage space, and the liquid injection hole 124 is used to inject electrolyte into the storage space. A lead-out piece is provided on the inner side of the housing 100, and the lead-out piece is conductively connected to the pole and the empty foil portion. In the present embodiment, the lead-out piece includes a first lead-out piece 122, a second lead-out piece, a first connecting piece 400 and a second connecting piece 500. The first lead-out piece 122 is arranged inside the negative electrode cover plate 120, and the first lead-out piece 122 can be connected to the negative electrode cover plate 120 by means such as welding, and the first lead-out piece 122 is connected to the negative electrode pole 121. The positive electrode pole is arranged on the positive electrode cover plate, and the second lead-out piece is arranged inside the positive electrode cover plate, and the second lead-out piece can be connected to the positive electrode cover plate by means such as welding, and the second lead-out piece is connected to the positive electrode pole. The first connecting piece 400 is connected to the first area on the first lead-out piece 122 and the first empty foil portion 212, and the second connecting piece 500 is connected to the second lead-out piece and the first area on the second empty foil portion. Among them, the first area is the area where the empty foil portion is connected and fitted with the lead-out piece. In this embodiment, the first lead-out sheet 122, the second lead-out sheet, the first connecting sheet 400 and the second connecting sheet 500 may be aluminum sheets, copper sheets, nickel sheets or other suitable conductive metal sheets, the first connecting sheet 400 is connected to the first lead-out sheet 122 and the first hollow foil portion 212 by welding, and the second connecting sheet 500 is connected to the second lead-out sheet and the second hollow foil portion by welding. Thus, the negative electrode sheet 210 and the negative electrode column 121 may be conductively connected by the first connecting sheet 400 and the first lead-out sheet 122, and the positive electrode sheet 220 and the positive electrode column may be conductively connected by the second connecting sheet 500 and the second lead-out sheet.

[0054] In some embodiments, the lead-out member may only include a first lead-out piece 122 and a second lead-out piece, wherein the first lead-out piece 122 is directly connected to the first area on the first empty foil portion 212 by welding, and the second lead-out piece is directly connected to the first area on the second empty foil portion by welding.

[0055] The first empty foil portion 212 and the second empty foil portion also include a second region outside the first region. The first region is the region on the empty foil portion that contacts and is welded to the lead-out piece, and the second region is the region on the empty foil portion other than the first region. In the present embodiment, the temperature sensing component 300 is disposed in the second region of the first empty foil portion 212 and is spaced apart from the lead-out piece (there is a certain gap between the temperature sensing component 300 and the lead-out piece instead of being directly attached). Disposing the temperature sensing component 300 here can effectively reduce the influence of the first connecting sheet 400 on temperature detection, thereby obtaining the temperature of the negative electrode sheet 210 more timely and accurately. The temperature sensing component 300 can be disposed between the first region and the first dressing portion 211 (i.e. Figure 3 The second area (between the first connecting sheet 400 and the first dressing portion 211) or the second area (between the first connecting sheet 400 and the first dressing portion 211) is provided on both sides of the first area (i.e. Figure 3 In some other embodiments, the temperature sensing element 300 may be disposed in the second area of ​​the second hollow foil portion. In some other embodiments, the temperature sensing element 300 may also be disposed on the lead-out element (e.g., the lead-out element located in the first area), or, disposed in the second area and attached to the side of the lead-out element.

[0056] In this embodiment, the battery further includes a container 123, a signal transmission device and a connecting line 600. The container 123 is located inside the negative electrode cover 120 and is connected to the negative electrode cover 120. The container 123 is a trough body made of an organic polymer resin material, which may include a bottom wall and a side wall surrounding the bottom wall in the circumferential direction, so that the top of the container 123 is open, and the bottom and the side are closed. The top of the container 123 can be connected to the negative electrode cover 120 by means such as hot melt connection or snap connection, so that the container 123 and the negative electrode cover 120 form a storage space together. The container 123 and the injection hole 124 are respectively arranged at opposite ends of the negative electrode cover 120 and do not affect each other. It should be noted that the opposite ends are the two ends in the length direction of the negative electrode cover 120, that is, they are arranged on both sides of the negative electrode column 121 and the first lead-out piece 122 in the length direction of the negative electrode cover 120. The signal transmission device is arranged in the accommodation space, and the accommodation member 123 is used to isolate the electrolyte from the signal transmission device to avoid direct contact between them and prevent the signal transmission device from being corroded.

[0057] In some embodiments, the container 123 may have an accommodation space inside, and the signal transmission device is located in the accommodation space, that is, the container 123 completely covers the signal transmission device. The container 123 can be formed by injection molding, for example, and the signal transmission device is covered therein during injection molding. The container 123 can be connected to the negative electrode cover plate 120 by a method such as hot melt connection or snap connection.

[0058] The first end of the connecting wire 600 passes through the container 123 and is connected to the signal transmission device, and the second end of the connecting wire 600 is connected to the temperature sensing component 300. The outer surface of the connecting wire 600 is an insulating layer for isolating the wire core and the electrolyte. The container 123 is provided with a perforation, and the first end of the connecting wire 600 passes through the perforation to connect to the signal transmission device. The connecting wire 600 is sealedly connected to the perforation, that is, the perforation is sealed by, for example, a sealant to prevent the electrolyte from entering the receiving space from the perforation. The connecting wire 600 signal transmission device is used to obtain the detection result of the temperature sensing component 300 through the connecting wire 600 and transmit the detection result to the outside. The temperature sensing component 300 can be a thermistor or a thermocouple.

[0059] The signal transmission device may include a wireless signal transmitter, such as a Bluetooth signal transmitter or a WiFi signal transmitter, which is used to transmit the detection result of the temperature sensing component 300 to the outside through a Bluetooth signal or a WiFi signal. The use of a wireless signal transmitter does not require opening a hole on the negative electrode cover plate 120 to lead out the signal transmission device, which can effectively ensure the overall airtightness of the battery. It should be noted that the accommodation space can be provided with not only a signal transmission device, but also a circuit board and other devices for analyzing and processing the detection result of the temperature sensing component 300, and this application does not limit this.

[0060] In some other embodiments, a hole may be opened on the negative electrode cover plate 120 to lead out the signal transmission device and connect it to an external device through a wire. In some other embodiments, when the temperature sensing component 300 is arranged in the second area of ​​the second empty foil portion, the container 123 may be arranged on the inner side of the positive electrode cover plate and connected to the positive electrode cover plate in the same manner as in the above embodiment, and the container 123 and the positive electrode cover plate together form a accommodating space or the container 123 has a accommodating space, and the signal transmission device is arranged in the accommodating space, the first end of the connecting wire 600 passes through the accommodating wire 123 and is connected to the signal transmission device, and the second end of the connecting wire 600 is connected to the temperature sensing component 300 arranged in the fourth area.

[0061] In this embodiment, the battery further includes an insulating film, which covers the temperature sensing element 300 and is used to isolate the electrolyte and the temperature sensing element 300 to prevent the electrolyte from affecting the detection result and service life of the temperature sensing element 300. The insulating film is pasted on the first empty foil portion 212, and the temperature sensing element 300 is closely attached to the first empty foil portion 212 through the insulating film, so that the temperature of the negative electrode sheet 210 can be accurately obtained. The insulating film can be pasted on the first empty foil portion 212 by insulating tape or glue, and the insulating film can also have its own adhesive surface and be adhered to the first empty foil portion 212 by its own adhesive surface. In some other embodiments, the insulating film can cover the temperature sensing element 300 and be pasted on the second empty foil portion to obtain the temperature of the positive electrode sheet 220. In some other embodiments, when the temperature sensing element 300 has sufficient corrosion resistance and does not affect the operation of the battery cell 200, the temperature sensing element 300 can be directly pasted on the first empty foil portion 212 and / or the second empty foil portion by insulating tape or glue.

[0062] The present application also provides a battery device, which includes the battery as described above. The battery device may be a battery pack, a battery module, an energy storage module, etc.

[0063] The present application also provides an electrical device, which includes the battery device or battery as described above. The electrical device may be a vehicle, an aircraft, a computer, an energy storage cabinet, a mobile phone, etc.

[0064] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0065] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0066] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various utility model aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features explicitly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features that are less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0067] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0068] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0069] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A battery, characterized in that: include: A battery cell, the battery cell comprising a pole piece, the pole piece comprising a dressing portion and a hollow foil portion; A temperature sensing component, wherein the temperature sensing component is arranged on the empty foil portion; The battery further comprises a shell, the battery cell is arranged inside the shell, a pole is arranged on the shell, a lead-out piece is arranged inside the shell, and the lead-out piece is conductively connected to the pole and the hollow foil portion; The battery also includes a container, a signal transmission device and a connecting line; The receiving member is located inside the housing and connected to the housing, and has a receiving space inside the receiving member, or the receiving member and the housing together form a receiving space; The signal transmission component is accommodated in the accommodation space, the first end of the connection line passes through the accommodation component and is connected to the signal transmission component, and the second end of the connection line is connected to the temperature sensing component.

2. The battery according to claim 1, characterized in that The battery core comprises multiple layers of hollow foil portions along the thickness direction thereof; One temperature sensing component is provided for every preset number of layers of the empty foil portion, wherein the preset number is greater than or equal to zero.

3. The battery according to claim 1, characterized in that The lead-out piece comprises a lead-out plate and a connecting plate. One end of the lead-out plate is conductively connected to the pole, and the other end of the lead-out plate is conductively connected to the empty foil portion through the connecting plate.

4. The battery according to claim 1, characterized in that The temperature sensing component and the lead-out component are spaced apart from each other.

5. The battery according to claim 1, characterized in that The receiving member is provided with a through hole, and the first end of the connecting line passes through the through hole to be connected with the signal transmission device; The connecting line is sealed and connected to the perforation.

6. The battery according to claim 1, characterized in that The housing comprises a shell and a cover plate, wherein the shell and the cover plate together form an accommodating space, and the battery cell, the container, the signal transmission device and the connecting wire are located in the accommodating space; The receiving member is connected to the cover plate, and a liquid injection hole is also provided on the cover plate, wherein the receiving member and the liquid injection hole are located at two opposite ends of the cover plate.

7. The battery according to claim 6, characterized in that The receiving member is connected to the cover plate by means of hot-melt connection or snap connection.

8. The battery according to claim 1, characterized in that The signal transmission device includes a wireless signal transmitter.

9. The battery according to claim 1, characterized in that The battery further includes an insulating film, the insulating film covers the temperature sensing element, and the insulating film is adhered to the empty foil portion.

10. The battery according to claim 1, characterized in that The battery core is a wound battery core or a laminated battery core.

11. The battery according to claim 1, characterized in that The temperature sensing element is a thermistor or a thermocouple.

12. The battery according to claim 1, characterized in that The electrode sheet comprises a negative electrode sheet and a positive electrode sheet, wherein the negative electrode sheet comprises a first dressing portion and a first empty foil portion, and the positive electrode sheet comprises a second dressing portion and a second empty foil portion; The temperature sensing component is arranged on the first hollow foil portion and / or the second hollow foil portion.

13. A battery device, characterized in that: Comprising the battery according to any one of claims 1 to 12.

14. An electrical device, characterized in that: Comprising the battery device according to claim 13 or the battery according to any one of claims 1-12.

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