Battery, battery early warning system and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery, a battery early warning system and electric equipment. The battery comprises a shell, wherein a closed battery chamber is formed in the shell; the at least one battery monomer is arranged in the battery chamber, a film with a gas storage cavity is arranged on the battery monomer, mark gas is stored in the gas storage cavity, and the film is suitable for melting at the set temperature of the battery and releasing the mark gas; and the detection assembly is arranged in the battery chamber, and the detection assembly is used for detecting the mark gas and outputting corresponding prompt information. According to the utility model, the battery structure and the overheating detection mode are improved, whether the single battery is overheated or not is determined by detecting the mark gas released after the pasting film is melted, and corresponding early warning prompt is carried out, so that the overheated single battery can be accurately positioned, the detection efficiency and the early warning accuracy are high, and the reliability is high. The battery pack is particularly suitable for being applied to a module or a battery pack with a plurality of single batteries, and can effectively reduce the safety risk and prevent the battery from being damaged due to overheating.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, in particular to a battery, a battery early warning system and electrical equipment. Background Art

[0002] At present, in the field of battery production and manufacturing, multiple batteries are usually assembled into modules and battery packs. During use, there are situations such as excessive current, short circuit, and high-rate charge and discharge, which can easily lead to battery overheating. When the battery overheats, there are certain safety risks, which pose a great safety hazard to the user. In the prior art, the temperature detection means for modules and battery packs are relatively simple, and the detection accuracy is not high. It is difficult to accurately monitor the overheating of each battery cell, which is not conducive to the implementation of corresponding precise temperature control measures, and there are still great safety hazards and risks for users. Utility Model Content

[0003] In view of this, in order to improve at least one of the above problems existing in the prior art, the utility model provides a battery, a battery early warning system and an electrical device.

[0004] The first technical solution of the utility model provides a battery, including: a shell, a closed battery chamber is formed in the shell; at least one battery cell is arranged in the battery chamber, a film with a gas storage cavity is provided on the battery cell, a marker gas is stored in the gas storage cavity, and the film is suitable for melting and releasing the marker gas at a set temperature of the battery; a detection component is arranged in the battery chamber, the detection component is used to detect the marker gas and can output corresponding prompt information.

[0005] In a feasible implementation, a battery top cover is provided on the top of the battery cell, and a top cover patch is provided on the top surface of the battery top cover; the film is connected to the surface of the top cover patch away from the battery top cover.

[0006] In a feasible implementation, the film includes an inner layer and an outer layer that are arranged opposite to each other; the edge of the outer layer is connected to the inner layer, and an air storage cavity is formed between the outer layer and the inner layer.

[0007] In a feasible implementation, the inner layer is connected to the surface of the top cover patch; or a first notch is opened on the top cover patch, the inner layer is arranged in the first notch, and the edge of the inner layer is connected to the top cover patch.

[0008] In a feasible implementation, the film includes an outer layer, the edge of the outer layer is connected to the surface of the top cover patch, and an air storage cavity is formed between the outer layer and the top cover patch.

[0009] In a feasible implementation, the thickness of the film ranges from 0.5 mm to 1 mm, and the size of the air storage cavity in the thickness direction ranges from 0.2 mm to 0.4 mm.

[0010] In a feasible implementation, the detection component includes at least one gas sensor, which is arranged in the battery chamber and is used to detect the marker gas; wherein the gas sensor is suitable for communicating with the battery management system and is suitable for outputting prompt information corresponding to the detected marker gas.

[0011] In a feasible implementation, there are multiple battery cells, and different marker gases are stored in the gas storage cavity on each battery cell; there are multiple gas sensors, each gas sensor matches one of the marker gases, and the multiple gas sensors are used to detect different marker gases.

[0012] In a feasible implementation, the battery includes multiple sub-assemblies, each sub-assembly includes a shell and multiple battery cells; in the same sub-assembly, the same marker gas is stored in the gas storage cavity on the multiple battery cells, and the marker gases in different sub-assemblies are different; wherein each sub-assembly is provided with at least one gas sensor, and the gas sensor matches the marker gas in the sub-assembly.

[0013] In a feasible implementation, the battery includes multiple sub-assemblies, each sub-assembly includes a shell and multiple battery cells; in the same sub-assembly, different marker gases are stored in the gas storage cavity on each battery cell; wherein each sub-assembly is provided with multiple gas sensors, and each gas sensor matches one of the marker gases.

[0014] The second aspect of the present invention provides a battery warning system, comprising: a battery as described in any one of the first aspects above; a battery management system, which is communicatively connected to a detection component of the battery, and the battery management system is suitable for receiving and outputting prompt information of the detection component.

[0015] The technical solution of the third aspect of the utility model provides an electrical device, including the battery in any one of the first aspect and / or the battery early warning system in any one of the second aspect.

[0016] The beneficial effects of the above technical solution of the utility model are embodied in:

[0017] The battery structure and overheat detection method have been improved. The film on the battery cell is used to store marker gas. The marker gas released after the film melts is detected to determine whether the battery cell is overheated, and corresponding prompts are given. Overheating warning can be achieved, and overheated battery cells can be accurately identified and located. The detection efficiency and warning accuracy are high. It is particularly suitable for use in battery modules or battery packs with multiple battery cells. It can effectively reduce safety risks and prevent battery overheating and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic diagram of a battery provided by an embodiment of the utility model.

[0019] Figure 2 Shown is a front schematic diagram of a battery cell provided by an embodiment of the utility model.

[0020] Figure 3 Shown is a side schematic diagram of a battery cell provided by an embodiment of the utility model.

[0021] Figure 4 Shown is a front schematic diagram of another battery cell provided by an embodiment of the utility model.

[0022] Figure 5 Shown is a cross-sectional view of a film and a top cover patch provided by an embodiment of the utility model.

[0023] Figure 6 Shown is a cross-sectional view of another film and top cover patch provided by an embodiment of the utility model.

[0024] Figure 7 Shown is a cross-sectional view of another film and top cover patch provided by an embodiment of the utility model.

[0025] Figure 8 Shown is a schematic diagram of another battery provided by an embodiment of the utility model.

[0026] Fig. 9 Shown is a schematic diagram of another battery provided by an embodiment of the utility model.

[0027] Fig.10 Shown is a schematic diagram of another battery provided by an embodiment of the utility model.

[0028] Fig.11 Shown is a schematic block diagram of a battery early warning system provided by an embodiment of the utility model.

[0029] Fig.12 Shown is a schematic diagram of heat conduction of a battery cell provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0030] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0031] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment 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.

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Application Overview

[0034] At present, in the battery manufacturing process, multiple batteries are usually assembled into modules and battery packs. During the use of the battery, there are situations such as excessive current, short circuit, and high-rate charge and discharge, which can easily lead to battery overheating and are accompanied by certain safety risks, which poses a great safety hazard to users.

[0035] In the prior art, the battery temperature is usually detected by setting a temperature detection module, but the temperature detection means for the module and battery pack are relatively simple, and the detection accuracy is not high. It is difficult to monitor the overheating of each battery cell in a timely and accurate manner, which is not conducive to accurate temperature control measures for the battery, and there are still great safety hazards and risks for users. Therefore, it is urgent to optimize and improve the existing temperature detection methods and structures of battery modules and battery packs.

[0036] Some embodiments of the battery, battery warning system and electrical equipment in the technical solution of the utility model are provided below.

[0037] In an embodiment of the first aspect of the present utility model, a battery 100 is provided, such as Figure 1 , Figure 2 and Figure 3 As shown, the battery 100 includes a shell 110, at least one battery cell 120 and a detection assembly 140. A closed battery chamber 111 is formed in the shell 110 to provide a storage space for the battery cell 120; the battery cell 120 and the detection assembly 140 are arranged in the battery chamber 111 of the shell 110, and a film 130 is arranged on the battery cell 120, and a gas storage cavity 131 is arranged in the film 130, and a marker gas is stored in the gas storage cavity 131; the film 130 can melt at the set temperature of the battery, and the marker gas in the gas storage cavity 131 has been released into the battery chamber 111. The detection assembly 140 is used to detect the marker gas in the battery chamber 111, and can output corresponding prompt information to prompt the temperature of the battery cell 120.

[0038] In practical applications, the battery setting temperature can be determined specifically according to the material of the film 130 as the critical melting temperature of the film 130, and the battery setting temperature is lower than the overheating temperature of the battery cell 120. When the battery cell 120 is overheated, the temperature of the battery cell 120 exceeds the battery setting temperature, and reaches the critical melting temperature of the film 130, so that the film 130 melts and releases the marker gas, so that the marker gas can be detected by the detection component 140.

[0039] The battery cells 120 include but are not limited to battery cells; the number of the battery cells 120 may be one or more. When multiple battery cells 120 are provided, they may be assembled into a module or a battery pack according to assembly requirements. Figure 1 The top of the battery cell 120 shown in the figure can be provided with the film 130 at different positions according to the specific conditions of the battery cell 120, and the setting position of the detection component 140 can also be adjusted according to the position of the film 130. Correspondingly, according to different usage requirements, the films 130 of multiple battery cells 120 can store the same marker gas or different types of marker gases, and the detection component 140 can detect multiple different marker gases at the same time.

[0040] The battery in this embodiment has improved battery structure and overheat detection method, and utilizes the film 130 on the battery cell 120 to store marker gas. By detecting the marker gas released after the film 130 melts, it is determined whether the battery cell 120 is overheated, and corresponding prompts are given. Overheating warning can be implemented, and the overheated battery cell 120 can be accurately identified and located. It is particularly suitable for use in a battery module or battery pack with multiple battery cells 120. The detection efficiency and warning accuracy are high, which can effectively reduce safety risks and prevent the battery from being damaged by overheating.

[0041] In a further embodiment of the present invention, Figures 1 to 4 As shown, a battery cover 125 is disposed on the top of the battery cell 120, and a cover patch 121 is disposed on the top surface of the battery cover 125; a film 130 is connected to the surface of the cover patch 121 away from the battery cover 125 (for example, Figure 4 The upper surface of the middle cover patch 121) is provided so that the film 130 can easily absorb the heat conducted by the battery cell 120. At this time, the detection component 140 can be arranged in the battery chamber 111 near the film 130, for example Figure 1 The detection component 140 can be arranged on the inner top wall of the battery chamber 111 shown in the figure, or can be arranged on the inner side wall of the battery chamber 111 near the film 130, so that after the film 130 melts, the detection component 140 can detect the marker gas released from the gas storage cavity 131 in time to improve the efficiency of detection and prompting. The film 130 can be connected to the top cover patch 121 by pasting, bonding, etc., and of course, the film 130 and the top cover patch 121 can also be designed as an integrated structure.

[0042] Furthermore, in a specific implementation, Figure 4 and Figure 5 As shown, the film 130 specifically includes an inner layer 132 and an outer layer 133, the outer layer 133 is arranged opposite to the inner layer 132, and the edge of the outer layer 133 is connected to the inner layer 132, so that the space between the outer layer 133 and the inner layer 132 forms a gas storage cavity 131. Among them, the inner layer 132 is connected to the top cover patch 121, for example, by the above-mentioned pasting, bonding, etc., so as to cover the surface of the battery top cover 125 together with the top cover patch 121. Preferably, the inner layer 132 and / or the outer layer 133 of the film 130 can be made of a flexible film material, such as a polyethylene / polypropylene plastic film, with a melting point of about 110°C to 116°C, which can be adapted to the overheating temperature of the battery.

[0043] It should be noted that the specific shapes of the outer layer 133 and the inner layer 132 of the film 130 can be set according to actual usage requirements. Specifically, they can be circular, rectangular or other shapes suitable for being set on the battery top cover 125. The specific size can be set according to the size and shape of the battery cell 120.

[0044] In another specific implementation, Figure 4 and Figure 6 As shown, a first notch 122 is provided on the top cover patch 121, and the inner layer 132 of the film 130 is arranged in the first notch 122, and the edge of the inner layer 132 is connected to the top cover patch 121, so that the inner layer 132 complements the first notch 122 of the top cover patch 121, and is connected to the top cover patch 121 as an integrated structure; the outer layer 133 is connected to the top cover patch 121, and a gas storage cavity 131 is formed between the outer layer 133 and the inner layer 132, and a marking gas is stored. Through the above connection method, the inner layer 132 can be directly in contact with the battery top cover 125, without the need to conduct heat from the middle through the top cover patch 121, and the heat conduction efficiency is higher. Among them, the shape and size of the first notch 122 are adapted to the inner layer 132, so that the inner layer 132 can completely cover the first notch 122.

[0045] Furthermore, in another specific implementation, Figure 4 and Figure 7 As shown, the film 130 includes an outer layer 133 to form a single-layer film; the edge of the outer layer 133 is connected to the surface of the top cover patch 121, so that the space between the outer layer 133 and the top cover patch 121 forms a gas storage cavity 131 for storing the marking gas. Compared with the previous embodiment, the inner layer 132 is eliminated, and the top cover patch 121 replaces the inner layer 132, further reducing the thickness of the film. Among them, the top cover patch 121 is made of the same material as the film 130, which can also be understood that the inner layer 132 of the film 130 replaces the original top cover patch 121, and can melt and release the marking gas when the battery cell 120 is overheated.

[0046] In the above embodiment, preferably, the overall thickness of the film 130 is in the range of 0.5mm to 1mm, and the size of the gas storage cavity 131 in the thickness direction is in the range of 0.2mm to 0.4mm, so that it can quickly melt and release the marker gas when the preset temperature of the battery is reached. The length and width of the film 130 can be specifically set according to the size of the battery cell 120 to adapt to the structure of the battery cell 120; for example Figure 1 and Figure 2 In the example shown in FIG. 1 , a pole 124 is further provided on the battery top cover 125 of the battery cell 120 , and the film 130 can be disposed between two poles 124 .

[0047] In addition, the marking gas may be argon, helium, xenon, krypton, ozone, ammonia, nitric oxide, etc. When a plurality of battery cells 120 are provided, the gas storage cavity 131 of the film 130 of each battery cell 120 stores one of the marking gases.

[0048] In a further embodiment of the present invention, Figure 1 and Figure 8 As shown, the detection component 140 of the battery 100 includes at least one gas sensor 141, which is arranged in the battery chamber 111 of the shell 110 and can be connected to the battery management system for communication; when the marker gas in the gas storage cavity 131 is released, the gas sensor 141 can detect the marker gas and output prompt information corresponding to the marker gas to the battery management system. The prompt information includes but is not limited to the type of marker gas and the relevant information of the battery cell 120 corresponding to the marker gas. The prompt information is output to the battery management system through the gas sensor 141, so that the battery overheating situation can be grasped and understood in time according to the prompt information, and then corresponding countermeasures can be taken to prevent safety accidents caused by battery overheating.

[0049] Furthermore, in a specific implementation, Figure 8 As shown, a plurality of battery cells 120 are disposed in the battery chamber 111 of the housing 110 to form a battery module. Different types of marker gases are stored in the gas storage cavity 131 of the film 130 on each battery cell 120. Correspondingly, a plurality of gas sensors 141 are disposed in the battery chamber 111. Each gas sensor 141 matches one of the marker gases and is disposed correspondingly to the battery cell 120 storing the marker gas. Figure 8 In the example, the gas storage cavities 131 of the four battery cells 120 in the housing 110 store argon, helium, xenon, and krypton respectively, and a gas sensor 141 matching the stored marker gas is provided above each battery cell 120. When any battery cell 120 overheats, the film 130 on the battery cell 120 melts due to the heat and releases the marker gas in the gas storage cavity 131, and a corresponding gas sensor 141 can detect the released marker gas, so that different marker gases can be detected by multiple gas sensors 141 respectively, and corresponding prompt information can be output. By matching different types of marker gases with corresponding gas sensors 141, each battery cell 120 in a battery module with multiple battery cells 120 can be monitored for overheating, and any battery cell 120 that overheats can be accurately located and warned.

[0050] Furthermore, in another specific implementation, as Fig. 9As shown, the battery 100 includes multiple subassemblies, each of which includes a housing 110 and multiple battery cells 120 disposed in the housing 110. The gas storage cavities 131 on the multiple battery cells 120 in the same subassembly all store the same marker gas, and different marker gases are respectively disposed in different subassemblies. Accordingly, at least one gas sensor 141 is disposed in the housing 110 of each subassembly to detect the marker gas in the subassembly. For example Fig. 9 In the example, four battery cells 120 are respectively arranged in two sub-assemblies of the battery 100, and the gas storage cavities 131 of the four battery cells 120 of one sub-assembly all store argon gas, and the gas storage cavities 131 of the four battery cells 120 of the other sub-assembly all store helium gas; when any battery cell 120 in any sub-assembly is overheated, the corresponding gas sensor 141 in the battery chamber 111 where it is located can detect the marker gas released from the gas storage cavity 131, and output the corresponding prompt information to the battery management system, so as to realize overheating warning and reminder, and the sub-assembly where the overheated battery cell 120 is located can be located according to the prompt information.

[0051] It should be noted that, in actual applications, multiple gas sensors 141 can be provided in the same subassembly according to usage requirements, and distributed at different positions of the battery chamber 111, so as to be able to detect the marker gas in a timely manner.

[0052] Furthermore, in another specific implementation, Fig.10 As shown, the battery 100 includes a plurality of subassemblies, each of which includes a housing 110 and a plurality of battery cells 120 disposed in the housing 110. Different types of marker gases are stored in the gas storage cavity 131 on each battery cell 120 in the same subassembly. Accordingly, a plurality of gas sensors 141 are disposed in the battery chamber 111 of each subassembly, and each gas sensor 141 matches one of the marker gases. For example Fig.10 In the example, the battery 100 includes two sub-assemblies, each of which is provided with four battery cells 120 and four gas sensors 141, and the battery cells 120 correspond to the gas sensors 141 one by one; when any battery cell 120 in any sub-assembly is overheated, a gas sensor 141 corresponding to the battery cell 120 can detect the marker gas released from the gas storage cavity 131 of the battery cell 120, and output corresponding prompt information to the battery management system, and accurately locate the sub-assembly position of the overheated battery cell 120 and the specific position in the sub-assembly according to the prompt information, so as to take corresponding countermeasures to the overheated battery cell 120 in time.

[0053] In an embodiment of the second aspect of the present utility model, a battery early warning system 300 is provided, such as Figures 1 to 11 As shown, the battery warning system 300 includes the battery 100 in any embodiment of the first aspect mentioned above and a battery management system 310; the battery management system 310 is communicatively connected with the detection component 140 of the battery 100, and the battery management system 310 can receive prompt information from the detection component 140 and can output the content of the prompt information to the outside, so that the user can be aware of the battery overheating situation in time, thereby realizing the battery overheating warning.

[0054] Among them, since the battery 100 adopts a method of detecting marker gas to identify the overheated battery cell 120, when multiple battery cells 120 are arranged to form a battery module or battery pack, the efficiency and accuracy of battery overheating detection and identification can be greatly improved, thereby effectively reducing the safety risk of the battery.

[0055] In addition, the battery early warning system 300 in this embodiment also has all the beneficial effects of the battery 100 in any embodiment of the first aspect mentioned above, which will not be repeated here.

[0056] For the battery 100 and the battery early warning system 300 of the present invention, a corresponding battery thermal diffusion monitoring method can also be applied as a battery testing method to evaluate the thermal diffusion capacity of a battery module or a battery pack.

[0057] by Fig.12 For example, the battery module specifically includes seven battery cells 120, each of which is a battery cell. The seven battery cells are arranged regularly and represented by letters A to G; each battery cell is provided with a film 130, and the gas storage cavity 131 of the film 130 stores a marker gas, which are argon, helium, xenon, krypton, ozone, ammonia, and nitric oxide in order, that is, the gas storage cavity 131 of battery cell A stores argon, the gas storage cavity 131 of battery cell B stores helium, and so on; accordingly, the detection component 140 is provided with seven gas sensors 141, which are respectively arranged corresponding to the seven battery cells, and each gas sensor 141 is used to detect the marker gas of a corresponding battery cell. When any battery cell is overheated, the volatilization time and volatilization speed of the marker gas detected by the corresponding gas sensor 141 can be used as the basis for determining the thermal diffusion capacity.

[0058] For example, when the battery cell A (which stores argon) is overheated, the film 130 melts and the argon volatilizes. The corresponding gas sensor 141 detects the argon and outputs corresponding prompt information to the battery management system 310. The user or tester can obtain relevant information through the battery management system 310 and determine the battery overheating situation according to the volatilization speed of the argon. When the temperature of the battery cell A is too high, it will transfer heat to the adjacent battery cell B; when the battery cell B is also overheated, the helium stored in the gas storage cavity 131 volatilizes. The corresponding gas sensor 141 detects the helium and outputs corresponding prompt information to the battery management system 310. The user or tester can judge the thermal diffusion capacity of the battery module according to the actual volatilization and volatilization speed of the marker gas of the battery cells A and B, so as to optimize and adjust the structure of the battery module or battery pack accordingly. The subsequent heat conduction process and the corresponding evaluation method are similar to this and will not be repeated here.

[0059] In the embodiment of the third aspect of the utility model, an electric device is also provided, comprising the battery in any embodiment of the first aspect and / or the battery warning system in any embodiment of the second aspect. The electric device is powered by the battery; when the battery overheats, the battery overheating can be detected in time and corresponding prompt information can be output to implement overheating warning, so that the user can be informed of the overheating in time and take countermeasures, thereby reducing safety risks, preventing safety accidents, and preventing the battery from being damaged due to overheating.

[0060] In addition, the electrical equipment in this embodiment also has all the beneficial effects of the battery in any of the above embodiments and / or the battery early warning system in any of the above embodiments, which will not be described in detail here.

[0061] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0062] The block diagrams of the devices, apparatuses, equipment and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to" and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to" and can be used interchangeably with them. It should also be noted that in the apparatus and equipment of the present utility model, each component can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present utility model.

[0063] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the utility model. Therefore, the utility model is not intended to be limited to the aspects shown herein, but in accordance with the widest range consistent with the principles and novel features of this utility model.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: A housing (110), wherein a closed battery chamber (111) is formed in the housing (110); At least one battery cell (120) is disposed in the battery chamber (111); a film (130) having a gas storage cavity (131) is disposed on the battery cell (120); a marker gas is stored in the gas storage cavity (131); the film (130) is suitable for melting at a set battery temperature and releasing the marker gas; A detection component (140) is disposed in the battery chamber (111), and the detection component (140) is used to detect the marker gas and can output corresponding prompt information.

2. The battery according to claim 1, characterized in that A battery top cover (125) is provided on the top of the battery cell (120), and a top cover patch (121) is provided on the top surface of the battery top cover (125); The film (130) is connected to the surface of the top cover patch (121) on a side away from the battery top cover (125).

3. The battery according to claim 2, characterized in that The film (130) comprises an inner layer (132) and an outer layer (133) which are arranged opposite to each other; The edge of the outer layer (133) is connected to the inner layer (132), and the gas storage cavity (131) is formed between the outer layer (133) and the inner layer (132).

4. The battery according to claim 3, characterized in that The inner layer (132) is connected to the surface of the top cover patch (121); or The top cover patch (121) is provided with a first notch (122), the inner layer (132) is arranged in the first notch (122), and the edge of the inner layer (132) is connected to the top cover patch (121).

5. The battery according to claim 2, characterized in that The film (130) comprises an outer layer (133), the edge of the outer layer (133) is connected to the surface of the top cover patch (121), and the air storage cavity (131) is formed between the outer layer (133) and the top cover patch (121).

6. The battery according to any one of claims 1 to 5, characterized in that: The thickness of the film (130) ranges from 0.5 mm to 1 mm, and the size of the gas storage cavity (131) in the thickness direction ranges from 0.2 mm to 0.4 mm.

7. The battery according to any one of claims 1 to 5, characterized in that: The detection component (140) comprises at least one gas sensor (141), wherein the gas sensor (141) is disposed in the battery chamber (111) and is used to detect the marker gas; The gas sensor (141) is suitable for being connected to a battery management system (310) for communication, and is suitable for outputting prompt information corresponding to the detected marker gas.

8. The battery according to claim 7, characterized in that There are a plurality of battery cells (120), and a different marker gas is stored in the gas storage cavity (131) on each of the battery cells (120); There are a plurality of gas sensors (141), each of the gas sensors (141) matches one of the marker gases, and the plurality of gas sensors (141) are respectively used to detect different marker gases.

9. The battery according to claim 7, characterized in that The battery comprises a plurality of subassemblies, each of the subassemblies comprising the housing (110) and a plurality of battery cells (120); In the same subassembly, the gas storage chambers (131) on the plurality of battery cells (120) store the same marker gas, and different marker gases are stored in different subassemblies; Wherein, at least one gas sensor (141) is provided in each of the subassemblies, and the gas sensor (141) matches the marker gas in the subassembly.

10. The battery according to claim 7, characterized in that The battery comprises a plurality of subassemblies, each of the subassemblies comprising the housing (110) and a plurality of battery cells (120); In the same subassembly, the gas storage cavity (131) on each battery cell (120) stores different marker gases; Wherein, each of the subassemblies is provided with a plurality of the gas sensors (141), and each of the gas sensors (141) matches one of the marker gases.

11. A battery early warning system, characterized in that: The battery according to any one of claims 1 to 10; A battery management system (310) is communicatively connected to the battery detection component (140), and the battery management system (310) is suitable for receiving and outputting prompt information of the detection component (140).

12. An electrical device, characterized in that: include: The battery according to any one of claims 1 to 10; and / or The battery early warning system as claimed in claim 11.

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