Battery device and power utilization device

Abstract

The utility model discloses a battery device and an electric device. The battery device comprises a battery box, at least one battery monomer, a water absorption layer and a pressure sensor, wherein an accommodating space is formed in the battery box; the at least one battery monomer is arranged in the accommodating space; the water absorbing layer is positioned in the accommodating space and covers the peripheral side wall of at least one battery monomer; and the pressure sensor is clamped between the water absorption layer and the peripheral side wall of the at least one battery monomer. Through the implementation mode, the water absorption layer wraps the peripheral side wall of at least one battery monomer, part of liquid in the battery box can be absorbed through the water absorption layer, risks of internal short circuit and the like caused by accumulation of the liquid in the battery box are reduced, and after the water absorption layer absorbs the liquid, the water absorption layer expands to extrude the pressure sensor, so that the pressure sensor is prevented from being damaged. And the liquid leakage condition of the battery device is detected through the pressure sensor, so that the risk of liquid leakage of the battery device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to sustainable development, which promotes the adjustment of energy structure and the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology, which has been widely used in portable electronics, electric vehicles and energy storage systems due to its high energy density, good cycle ability, high working voltage, environmental protection and low self-discharge.

[0003] During the use of the battery device, liquid leakage may occur, resulting in the presence of liquid in the box of the battery device. However, if the problem of liquid leakage cannot be detected in time, it may cause a series of sudden problems such as thermal runaway and internal short circuit of the battery device. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a battery device and a power utilization device, which aims to solve the above technical problems existing in the prior art.

[0005] To solve the above problems, the present application provides a battery device, which comprises a battery box, at least one battery monomer, a water absorption layer and a pressure sensor, the battery box forms a containing space; at least one battery monomer is arranged in the containing space; the water absorption layer is located in the containing space, and the water absorption layer covers the outer peripheral side wall of at least one battery monomer; the pressure sensor is clamped between the water absorption layer and the outer peripheral side wall of at least one battery monomer.

[0006] In some embodiments, the number of battery monomers is multiple, the multiple battery monomers are arranged in sequence to form a battery cell column, the water absorption layer covers the outer peripheral side wall of the battery cell column, and the pressure sensor is clamped between the water absorption layer and the outer peripheral side wall of the battery cell column.

[0007] In some embodiments, the number of battery cell columns is multiple, the multiple battery cell columns are arranged in sequence, the number of water absorption layers and the number of pressure sensors correspond to the number of battery cell columns, each water absorption layer covers the outer peripheral side wall of one battery cell column, and each pressure sensor is clamped between one water absorption layer and the outer peripheral side wall of one battery cell column.

[0008] In some embodiments, the pressure sensor comprises multiple detection points, and the multiple detection points surround the outer peripheral side wall of the battery cell column.

[0009] In some embodiments, the water absorption layer is wrapped around the outer circumferential sidewall of one of the battery cells, and the pressure sensor comprises a plurality of detection points, and the plurality of detection points are arranged around the outer circumferential sidewall of the battery cell.

[0010] In some embodiments, the battery device further comprises a temperature sensor, and the temperature sensor is arranged in the accommodation space.

[0011] In some embodiments, the battery device further comprises a gas pressure sensor, and the gas pressure sensor is arranged in the accommodation space.

[0012] In some embodiments, the battery device further comprises a battery management system, and the battery management system is arranged in the accommodation space, the battery management system is in communication connection with the pressure sensor, and the battery management system is configured to receive pressure information of the pressure sensor.

[0013] In some embodiments, the battery device comprises an explosion-proof valve, and the explosion-proof valve is arranged in the battery box.

[0014] To solve the above problems, the application provides a power consumption device, which comprises the battery device as described above.

[0015] Compared with the prior art, the battery device of the application comprises a battery box, at least one battery cell, a water absorption layer, and a pressure sensor, the battery box forms an accommodation space, the at least one battery cell is arranged in the accommodation space, the water absorption layer is arranged in the accommodation space and wrapped around the outer circumferential sidewall of the at least one battery cell, and the pressure sensor is clamped between the water absorption layer and the outer circumferential sidewall of the at least one battery cell. Through the above-mentioned embodiments, the water absorption layer is wrapped around the outer circumferential sidewall of the at least one battery cell, part of the liquid in the battery box can be absorbed by the water absorption layer, the risk of internal short circuit caused by the accumulation of liquid in the battery box is reduced, and after the water absorption layer absorbs the liquid, the expansion of the water absorption layer will squeeze the pressure sensor, and then the pressure sensor detects the liquid leakage of the battery device, thereby reducing the risk of liquid leakage of the battery device. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments;

[0018] Figure 2is a schematic diagram of a battery device according to one or more embodiments;

[0019] Figure 3 is a schematic diagram of a battery device according to one or more embodiments;

[0020] Figure 4 is a schematic diagram of a battery cell, a water absorption layer and a pressure sensor according to one or more embodiments;

[0021] Figure 5 is a schematic diagram of a plurality of battery cells and a water absorption layer according to one or more embodiments;

[0022] Figure 6 is a schematic diagram of a plurality of battery cells, a water absorption layer and a pressure sensor according to one or more embodiments.

[0023] Reference signs: vehicle 1; battery device 2; controller 3; motor 4; battery cell 10; cell column 11; battery box 20; accommodation space 21; water absorption layer 30; pressure sensor 40; detection point 41; temperature sensor 51; air pressure sensor 52; battery management system 60; explosion-proof valve 70. DETAILED DESCRIPTION

[0024] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0026] 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 "plurality" is two or more, unless otherwise explicitly specified.

[0027] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0028] In the description of the embodiments of the application, the term“and / or” is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character“ / ” herein generally represents an“or” relationship between the front and rear associated objects.

[0029] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0030] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the application.

[0031] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0032] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of the battery, the demand of the market is also increasing.

[0033] Batteries referred to in the art can be classified as primary batteries and secondary batteries depending on whether they can be recharged. Primary batteries, also known as "disposable" batteries and primary cells, cannot be recharged and must be disposed of after their charge is depleted. Secondary batteries, also known as rechargeable batteries or secondary cells, are manufactured and processed differently from primary batteries and have the advantage of being able to be used multiple times after being recharged. Secondary batteries have a higher load current capacity than most primary batteries. Common types of secondary batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries have the advantages of being lightweight, having a large capacity (1.5 to 2 times the capacity of a nickel-metal hydride battery of the same weight), having no memory effect, and having a very low self-discharge rate. As a result, even though they are relatively expensive, they are widely used. Lithium-ion batteries are also widely used in electric vehicles and hybrid vehicles. Lithium-ion batteries used for such purposes have a relatively low capacity, but have a high output, a high charging current, and a long service life, although they are more expensive.

[0034] The batteries described in the embodiments of the present application refer to secondary batteries or primary batteries. In the following, the embodiments of the present application will be described mainly with reference to lithium-ion batteries. It should be understood that the embodiments of the present application are applicable to any other suitable type of secondary battery. The batteries referred to in the embodiments disclosed in the present application can be directly or indirectly applied to suitable devices to power the devices.

[0035] The present application provides an electric device. The electric device can include, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy can include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like. The electric device can include a battery. The electric device can provide power through the battery to achieve corresponding functions.

[0036] The present application also provides an electric vehicle. The electric vehicle can include a battery device.

[0037] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments.

[0038] The vehicle 1 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1 is internally provided with a battery device 2, which can be arranged at the bottom, the head, or the tail of the vehicle 1. The battery device 2 can be used for power supply of the vehicle 1, for example, the battery device 2 can be used as an operating power source of the vehicle 1. The vehicle 1 can further include a controller 3 and a motor 4, and the controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, to meet the power demand of the vehicle 1 during starting, navigation, and driving.

[0039] In some embodiments of the present application, the battery device 2 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1.

[0040] In order to improve the performance of the power consumption device, the present application further provides a battery device, which is described below with reference to Figure 2 and Figure 3 , Figure 2 is an exploded structural schematic view of a battery device according to one or more embodiments, Figure 3 is a structural schematic view of a battery device according to one or more embodiments.

[0041] The battery device 2 includes a battery box 20, at least one battery cell 10, a water absorption layer 30, and a pressure sensor 40. The battery box 20 is formed with a containing space 21. The at least one battery cell 10 is arranged in the containing space 21. The water absorption layer 30 is located in the containing space 21, and the water absorption layer 30 covers the outer circumferential side wall of the at least one battery cell 10. The pressure sensor 40 is clamped between the water absorption layer 30 and the outer circumferential side wall of the at least one battery cell 10.

[0042] The battery box 20 is used to provide the containing space 21 for the battery cell 10, and the battery box 20 can adopt various structures. In some embodiments, the battery box 20 can include a first part and a second part, and the first part and the second part are overlapped with each other, and the first part and the second part jointly define the containing space 21 for accommodating the battery cell 10. The second part can be a hollow structure with one end open, and the first part can be a plate-shaped structure, and the first part is overlapped with the open side of the second part to jointly define the containing space 21 with the second part. The first part and the second part can also be hollow structures with one side open, and the open side of the first part is overlapped with the open side of the second part.

[0043] In the battery device 2, the battery cells 10 can be multiple, and the multiple battery cells 10 can be connected in series or in parallel or in a mixed manner. The mixed manner means that the multiple battery cells 10 are connected in series and in parallel. The multiple battery cells 10 can be directly connected in series or in parallel or in a mixed manner, and then the multiple battery cells 10 are accommodated in the battery box 20. Of course, the multiple battery cells 10 can be connected in series or in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the battery box 20. The battery device 2 can also include other structures, for example, the battery device 2 can also include a current collecting component for realizing electrical connection between the multiple battery cells 10.

[0044] The manufacturing methods of the battery cells 10 include the laminated type and the wound type, that is, the battery cells 10 are divided into two types of laminated battery cells and wound battery cells. The laminated battery cells have uniform current collection effect, small internal resistance, and large specific power. However, in order to improve the precision, the mold precision is required to be extremely high, the equipment investment is high, and the process is relatively complex, and the production efficiency is low. The wound battery cell is simple to manufacture, the equipment precision is generally required in the manufacturing and assembling process, the production efficiency is high, and the cost is relatively low. In terms of performance, the wound battery cell has excellent high and low temperature performance, very fast charging, super long life, stable high output voltage, and strong structure and shock resistance.

[0045] In some related embodiments, during use of the battery device 2, liquid leakage may occur, and liquid may exist in the inside of the box of the battery device 2. However, if the liquid leakage problem cannot be detected in time, a series of sudden problems such as thermal runaway and internal short circuit of the battery device 2 may occur. The water absorption layer 30 in the embodiment is wrapped around the outer circumferential side wall of at least one battery cell 10, and the water absorption layer 30 can have a water absorption function and can absorb at least part of the liquid in the accommodation space 21. The water absorption layer 30 can be wrapped around the circumferential side of one battery cell 10, or a plurality of battery cells 10 are arranged together, and the water absorption layer 30 can be wrapped around the outer circumferential side of the plurality of battery cells 10 arranged in a shape.

[0046] The pressure sensor 40 is clamped between the water absorption layer 30 and the outer circumferential side wall of at least one battery cell 10, and the pressure sensor 40 can detect the extrusion force received by itself. In the state that the water absorption layer 30 is not absorbing water, the pressure sensor 40 is extruded by the battery cell 10 and the water absorption layer 30, so as to detect first pressure data. When the battery device 2 leaks, the water absorption layer 30 absorbs at least part of the liquid and expands, and the expanded water absorption layer 30 further extrudes the pressure sensor 40, so that the pressure sensor 40 detects second pressure data greater than the first pressure data. When the difference between the second pressure data and the first pressure data is greater than a preset threshold value, it can be determined that the battery device 2 leaks.

[0047] Through the above embodiments, the water absorption layer 30 is wrapped around the outer circumferential wall of the at least one battery monomer 10, and part of the liquid in the battery box 20 can be absorbed by the water absorption layer 30, thereby reducing the risk of internal short circuit caused by the accumulation of liquid inside the battery box 20, and after the water absorption layer 30 absorbs the liquid, the water absorption layer 30 expands to press the pressure sensor 40, and then the pressure sensor 40 detects the liquid leakage of the battery device 2, thereby reducing the risk of liquid leakage of the battery device 2.

[0048] In some embodiments, the battery device 2 further comprises a temperature sensor 51 arranged in the accommodation space 21. The temperature sensor 51 is arranged in the accommodation space 21, and the temperature change in the accommodation space 21 can be detected by the temperature sensor 51. The temperature sensor 51 can be a high-precision temperature sensor 51, and the measurement accuracy of the temperature sensor 51 can be ±0.1 degrees Celsius. The temperature sensor 51 can be mounted on the outer side wall of the battery monomer 10, or the temperature sensor 51 can be mounted on the inner side wall of the battery box 20. The temperature sensor 51 can transmit the detected temperature data to an external device or a battery management system 60 of the battery device 2, etc. By detecting the temperature change of the battery device 2, whether the battery device 2 has a thermal runaway condition can be monitored in time, and the use performance of the battery device 2 is improved.

[0049] In some embodiments, the battery device 2 further comprises a gas pressure sensor 52 arranged in the accommodation space 21. The gas pressure sensor 52 is arranged in the accommodation space 21, and the gas pressure change in the accommodation space 21 can be detected by the gas pressure sensor 52. The gas pressure sensor 52 can be a high-precision gas pressure sensor 52, and the measurement accuracy of the gas pressure sensor 52 can be ±0.1 kPa. The gas pressure sensor 52 can be mounted on the outer side wall of the battery monomer 10, or the gas pressure sensor 52 can be mounted on the inner side wall of the battery box 20. The gas pressure sensor 52 can transmit the detected gas pressure data to an external device or a battery management system 60 of the battery device 2, etc. When the battery device 2 has a thermal runaway condition, the gas pressure inside the battery device 2 will change greatly, and the gas pressure change of the battery device 2 can be detected by the gas pressure sensor 52, so that whether the battery device 2 has a thermal runaway condition can be monitored in time, and the use performance of the battery device 2 is improved.

[0050] In some other embodiments, a liquid leakage sensor can also be installed inside the battery device 2. The liquid leakage sensor can detect a small amount of liquid leakage, thereby improving the liquid leakage accuracy of the battery device 2. The detection range of the liquid leakage sensor can be 0.1 ml to 100 ml, and the detection accuracy of the liquid leakage sensor can be 0.1 ml.

[0051] In some embodiments, the battery device 2 further comprises a battery management system 60, the battery management system 60 is arranged in the accommodation space 21, the battery management system 60 is in communication connection with the pressure sensor 40, and the battery management system 60 is used to receive the pressure information of the pressure sensor 40. The battery management system 60 can be located in the accommodation space 21, the battery management system 60 can be in communication connection with the pressure sensor 40, the air pressure sensor 52, the temperature sensor 51 and the like, the battery management system 60 can receive the pressure information of the pressure sensor 40 and send the pressure information to an external device, such as a hollow platform of a vehicle. And / or, the battery management system 60 can receive the air pressure information of the air pressure sensor 52 and send the air pressure information to an external device. And / or, the battery management system 60 can receive the temperature information of the temperature sensor 51 and send the temperature information to an external device. And the battery management system 60 can also receive control information from an external device and send the control information to the pressure sensor 40, the air pressure sensor 52, the temperature sensor 51 and the like, so that each component performs corresponding operations according to the control information.

[0052] In some embodiments, the battery device 2 comprises an explosion-proof valve 70 arranged in the battery box 20. The explosion-proof valve 70 can be embedded in the battery box 20. For example, the battery box 20 can be provided with a pressure relief hole penetrating the accommodation space 21 and the external space, the explosion-proof valve 70 is fixedly connected with the battery box 20 and covers the pressure relief hole, when the air pressure in the accommodation space 21 is too large, the explosion-proof valve 70 can perform valve opening operation, thereby adjusting the air pressure in the accommodation space 21.

[0053] Referring to Figure 4 , Figure 4 is a structural schematic diagram of a battery cell 10, a water absorption layer 30 and a pressure sensor 40 according to one or more embodiments.

[0054] The water absorption layer 30 covers the outer peripheral side wall of one battery cell 10, and the pressure sensor 40 comprises a plurality of detection points 41 surrounding the outer peripheral side wall of the battery cell 10. The battery cell 10 can comprise a top wall provided with a pole and other walls not provided with a pole, and the water absorption layer 30 can cover the other walls of the battery cell 10. For example, when the battery cell 10 is a quadrangular prism, the pole is arranged on one end face of the quadrangular prism, and the remaining five walls can be covered with the water absorption layer 30, and the pressure sensor 40 is clamped between the water absorption layer 30 and the battery cell 10. The pressure sensor 40 can be provided with a plurality of detection points 41, the detection points 41 can be arranged at intervals, and the plurality of detection points 41 can be connected in sequence to form a circular ring, thereby being distributed on the outer peripheral side wall of the battery cell 10. For example, the plurality of detection points 41 are arranged around the battery cell 10 in the circumferential direction, and each detection point 41 can be used to detect the pressure data of the corresponding position.

[0055] Referring to Figure 5 and Figure 6 , Figure 5 is a structural schematic diagram of a plurality of battery monomers 10 and a water absorption layer 30 according to one or more embodiments. Figure 6 is a structural schematic diagram of a plurality of battery monomers 10, a water absorption layer 30 and a pressure sensor 40 according to one or more embodiments.

[0056] The number of battery monomers 10 is a plurality, and the plurality of battery monomers 10 are arranged in sequence to form a battery cell column 11. The water absorption layer 30 is wrapped around the outer peripheral side wall of the battery cell column 11, and the pressure sensor 40 is clamped between the water absorption layer 30 and the outer peripheral side wall of the battery cell column 11. The number of battery monomers 10 of the battery cell column 11 can be at least two, and the at least two battery monomers 10 can be arranged in a straight line along the width direction of the battery monomer 10, and the opposite two side walls of the adjacent two battery monomers 10 can be arranged in abutment. The entire battery cell column 11 can be regarded as a whole, and the water absorption layer 30 can be wrapped around the outer peripheral side wall of the entire battery cell column 11, for example, the water absorption layer 30 can be annular, so that the absorption layer is wrapped around the outer peripheral side wall of the battery cell column 11.

[0057] Further, the number of battery cell columns 11 is a plurality, and the plurality of battery cell columns 11 are arranged in sequence. The number of water absorption layers 30 and the number of pressure sensors 40 correspond to the number of battery cell columns 11. Each water absorption layer 30 is wrapped around the outer peripheral side wall of a battery cell column 11, and each pressure sensor 40 is clamped between a water absorption layer 30 and the outer peripheral side wall of a battery cell column 11. The plurality of battery monomers 10 of the battery cell column 11 can be arranged in sequence along the width direction of the battery monomer 10, and the plurality of battery cell columns 11 can be arranged in sequence along the length direction of the battery monomer 10. Each battery column is wrapped by a water absorption layer 30, and each battery cell column 11 and the water absorption layer 30 clamps at least one pressure sensor 40. That is, the pressure sensor 40, the corresponding battery cell column 11 and the corresponding water absorption layer 30 can be regarded as a whole structure, and then the whole structure is arranged in sequence along the length direction of the battery monomer 10.

[0058] Further, the pressure sensor 40 includes a plurality of detection points 41, and the plurality of detection points 41 surround the outer peripheral side wall of the battery cell column 11. The detection points 41 can be arranged at intervals, and the plurality of detection points 41 can be connected in sequence to form a circular ring, and then distributed on the outer peripheral side wall of the battery cell column 11, for example, the plurality of detection points 41 are arranged around the battery cell column 11 along the circumferential direction. One detection point 41 can be clamped between one battery monomer 10 of the battery cell column 11 and the water absorption layer 30, and each detection point 41 can be used to detect the pressure data of the corresponding position of the point.

[0059] In summary, the water absorption layer 30 is wrapped around the outer circumferential wall of the at least one battery cell 10, and can absorb part of the liquid in the battery box 20 through the water absorption layer 30, reduce the risk of internal short circuit caused by the accumulation of liquid inside the battery box 20, and after the water absorption layer 30 absorbs the liquid, the water absorption layer 30 expands to press the pressure sensor 40, and then the liquid leakage of the battery device 2 is detected through the pressure sensor 40, thereby reducing the risk of liquid leakage of the battery device 2.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; 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 be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a battery box formed with a receiving space; at least one battery cell arranged in the receiving space; a water absorption layer located in the receiving space, the water absorption layer being wrapped around the outer circumferential sidewall of the at least one battery cell; a pressure sensor clamped between the water absorption layer and the outer circumferential sidewall of the at least one battery cell.

2. The battery device according to claim 1, characterized by The number of the battery cells is multiple, and the multiple battery cells are arranged in sequence to form a cell column, the water absorption layer is wrapped around the outer circumferential sidewall of the cell column, and the pressure sensor is clamped between the water absorption layer and the outer circumferential sidewall of the cell column.

3. The battery device of claim 2, wherein, The number of the cell columns is multiple, and the multiple cell columns are arranged in sequence, the number of the water absorption layers and the number of the pressure sensors correspond to the number of the cell columns, each water absorption layer is wrapped around the outer circumferential sidewall of one cell column, and each pressure sensor is clamped between one water absorption layer and the outer circumferential sidewall of one cell column.

4. The battery device of claim 2, wherein The pressure sensor comprises multiple detection points, and the multiple detection points are arranged around the outer circumferential sidewall of the cell column.

5. The battery device of claim 1, wherein The water absorption layer is wrapped around the outer circumferential sidewall of one battery cell, and the pressure sensor comprises multiple detection points, and the multiple detection points are arranged around the outer circumferential sidewall of the battery cell.

6. The battery device according to any one of claims 1 to 5, wherein The battery device further comprises a temperature sensor arranged in the receiving space.

7. The battery device according to any one of claims 1 to 5, wherein The battery device further comprises an air pressure sensor arranged in the receiving space.

8. The battery device according to any one of claims 1 to 5, wherein The battery device further comprises a battery management system arranged in the receiving space, the battery management system is in communication connection with the pressure sensor, and the battery management system is used to receive the pressure information of the pressure sensor.

9. The battery device according to any one of claims 1 to 5, wherein The battery device comprises an explosion-proof valve arranged in the battery box.

10. An electrical device, characterized by The power consumption device comprises the battery device according to any one of claims 1 to 9.

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