Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device provided by the utility model comprises a box body, a plurality of battery monomers, a deformation detection assembly and a control system, the box body is provided with a first accommodating space and comprises a first wall part; the plurality of single batteries are arranged in the first accommodating space; the deformation detection assembly comprises an emitter and a receiver, the emitter is used for emitting a detection light beam to the receiver along a preset transmission path, the first wall part deforms towards the outer side of the first accommodating space under the expansion action of the plurality of battery monomers, and the deformation direction of the first wall part intersects with the transmission path; at least after the deformation of the first wall part exceeds a preset degree, the transmission intensity of the detection light beam along the transmission path is changed; the control system is connected with the receiver and generates a deformation indication signal based on a detection signal of the receiver. Therefore, the control system can prompt that the deformation of the first wall part exceeds the preset degree, and the risk of misjudgment of the health state of the battery device is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric equipment. 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] The battery device can include one or more battery monomers, which will gradually swell during use. When the battery monomers swell to a certain extent, it will cause the structure of the battery device to fail, and the service life of the battery device ends. If not stopped in time, it is easy to cause the battery device to catch fire or even explode. Practical new type content

[0004] The main purpose of the present application is to provide a battery device and an electric equipment, 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 box body, a plurality of battery monomers, a deformation detection assembly and a control system. The box body is provided with a first accommodating space and comprises a first wall part. The plurality of battery monomers are arranged in the first accommodating space. The deformation detection assembly comprises a transmitter and a receiver. The transmitter is used to emit a detection light beam to the receiver along a preset transmission path. The first wall part is deformed to the outside of the first accommodating space under the swelling action of the plurality of battery monomers. The deformation direction of the first wall part is intersected with the transmission path, and the intensity of the detection light beam along the transmission path is changed after the deformation of the first wall part exceeds a predetermined degree. The control system is connected with the receiver and generates a deformation indication signal based on the detection signal of the receiver. Thus, the transmitter emits a detection light beam to the receiver along a preset transmission path. The deformation direction of the first wall part is intersected with the transmission path. When the deformation of the first wall part exceeds a predetermined degree, the intensity of the detection light beam along the transmission path can be changed, so that the control system can generate a deformation indication signal based on the detection signal of the receiver to prompt that the deformation of the first wall part exceeds the predetermined degree, thereby facilitating timely detection of the deformation degree of the first wall part and relieving the risk of misjudgment of the health status of the battery device due to failure to timely detect that the deformation of the first wall part exceeds the predetermined degree.

[0006] In some embodiments, the first wall portion is arranged to move into the transmission path and block the transmission of the detection light beam along the transmission path when the deformation of the first wall portion exceeds the predetermined degree. In this way, the detection light beam along the transmission path can be blocked by the deformation of the first wall portion, so that the control system can simply determine whether the deformation exceeds the predetermined degree according to whether the receiver receives the detection light beam, and the structure is simple and the accuracy of the determination is improved.

[0007] In some embodiments, an extension portion is arranged on the first wall portion on the side facing away from the first accommodating space, and the extension portion moves synchronously with the deformation of the first wall portion and is used to change the intensity of the transmission of the detection light beam along the transmission path at least when the deformation of the first wall portion exceeds the predetermined degree. In this way, by arranging the extension portion, the intensity of the detection light beam can be changed by the synchronous movement of the extension portion with the first wall portion, and the mounting distance between the deformation detection assembly and the first wall portion can be increased, without the mounting distance between the deformation detection assembly and the first wall portion being arranged to be too close, and the assembly difficulty is reduced

[0008] In some embodiments, the extension portion is arranged to move into the transmission path and block the transmission of the detection light beam along the transmission path when the deformation of the first wall portion exceeds the predetermined degree. In this way, the detection light beam along the transmission path can be blocked by the deformation of the first wall portion, so that the control system can simply determine whether the deformation exceeds the predetermined degree according to whether the receiver receives the detection light beam, and the structure is simple and the accuracy of the determination is improved.

[0009] In some embodiments, the extension portion intersects the transmission path and is provided with a light-transmitting region and a light-blocking region, one of the light-transmitting region and the light-blocking region is located in the transmission path before the deformation of the first wall portion exceeds the predetermined degree, and the other of the light-transmitting region and the light-blocking region is located in the transmission path after the deformation of the first wall portion exceeds the predetermined degree. In this way, the detection light beam can be transmitted through the extension portion through the light-transmitting region and blocked by the light-blocking region, so that the control system can simply determine whether the deformation exceeds the predetermined degree according to the conversion of the receiver from receiving the detection light beam to not receiving the detection light beam, and the structure is simple and the accuracy of the determination is improved.

[0010] In some embodiments, the extension portion intersects the transmission path, and the transmittance of the extension portion to the detection light beam is arranged to change along the movement direction of the extension portion. In this way, the control system can monitor the degree of deformation in real time according to the intensity of the detection light beam received by the receiver, so that the monitoring instantaneity and sensitivity of the degree of deformation of the first wall portion are improved, and it is convenient to make an estimate before the deformation of the first wall portion exceeds the predetermined degree.

[0011] In some embodiments, the box further comprises a second wall portion and a third wall portion, the second wall portion and the third wall portion are arranged side by side and spaced apart from each other, the first wall portion connects the second wall portion and the third wall portion, the transmitter is arranged on the second wall portion, and the receiver is arranged on the third wall portion. In this way, by arranging the transmitter on the second wall portion, arranging the receiver on the third wall portion, and connecting the first wall portion to the second wall portion and the third wall portion, the position of the first wall portion relative to the transmission path is fixed at the same degree of deformation, the stability of the detection light beam is improved, and the risk of false judgment caused by interference of the detection light beam is alleviated.

[0012] In some embodiments, the box further comprises a second accommodating space, the first wall portion is used to separate the first accommodating space and the second accommodating space, and the deformation detection assembly is arranged in the second accommodating space. In this way, the deformation detection assembly can be protected by the second accommodating space, and the stability and reliability of the deformation detection assembly are improved.

[0013] In some embodiments, the plurality of battery monomers are arranged in the first accommodating space in an array manner, the box has a first reference direction arranged along the spacing direction of the second wall portion and the third wall portion and a second reference direction perpendicular to the first reference direction, the first wall portion is arranged outside the plurality of battery monomers in the second reference direction, and each battery monomer has a dimension along the first reference direction greater than a dimension along the second reference direction. In this way, by the arrangement manner of the specific battery monomers, the two sides of the battery monomers with relatively large expansion are arranged along the second reference direction, the deformation amount of the first wall portion is greater than the deformation of the second wall portion and the third wall portion, the structural stability of the detection assembly is improved, and the first wall portion with large deformation is detected, so that the deformation of the box can be more accurately reflected.

[0014] To solve the above problems, the application further provides a battery device. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0016] Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application;

[0017] Figure 2 is an exploded structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0018] Figure 3is a first structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0019] Figure 4 is a first structural schematic diagram of a battery device according to one or more embodiments of the present application; Figure 3 is a structural schematic diagram of a first wall portion of the battery device exceeding a deformation degree;

[0020] Figure 5 is a second structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0021] Figure 6 is a second structural schematic diagram of a battery device according to one or more embodiments of the present application; Figure 5 is a structural schematic diagram of a first wall portion of the battery device exceeding a deformation degree;

[0022] Figure 7 is a third structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0023] Figure 8 is a third structural schematic diagram of a battery device according to one or more embodiments of the present application; Figure 7 is a structural schematic diagram of a first wall portion of the battery device exceeding a deformation degree.

[0024] FIG. 1 is a vehicle 1; FIG. 2 is a battery device 2; FIG. 3 is a controller 3; FIG. 4 is a motor 4; FIG. 5 is a battery cell 10; FIG. 6 is a case 20; FIG. 7 is a first portion 21; FIG. 8 is a second portion 22; FIG. 9 is a first accommodating space 23; FIG. 10 is a first wall portion 24; FIG. 11 is a second wall portion 25; FIG. 12 is a third wall portion 26; FIG. 13 is a second accommodating space 27; FIG. 14 is a deformation detection assembly 30; FIG. 15 is a transmitter 31; FIG. 16 is a receiver 32; FIG. 17 is a transmission path 33; FIG. 18 is a detection light beam 34; FIG. 19 is a control system 40; FIG. 20 is an extension portion 50; FIG. 21 is a light-transmitting region 51; FIG. 22 is a light-blocking region 52; FIG. 23 is a first reference direction x1; FIG. 24 is a second reference direction x2; and FIG. 25 is a separation distance D. DETAILED DESCRIPTION

[0025] 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.

[0026] 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 this 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.

[0027] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0028] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of the present application, the term "and / or" is only a description of the 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 associated objects before and after it.

[0030] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0031] In the description of the embodiments of the present 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 present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 present application.

[0032] In the description of the embodiments of the present 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 present application can be understood according to the specific circumstances.

[0033] 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 hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0034] The battery monomer will gradually expand during use. When the battery monomer expands to a certain extent, it will cause the structural failure of the battery device, the service life of the battery device ends, and if it is not used in time, it is easy to cause the battery device to burn or even explode. At present, it is difficult to prompt the expansion degree of the battery monomer, so as to easily cause misjudgment of the state of the battery device.

[0035] To solve the technical problems existing in the related art, a battery device and a power utilization equipment are provided. The battery device contains the battery monomer through the box body. The battery monomer will extrude the first wall part of the box body and cause the deformation of the first wall part during the expansion process. The deformation detection assembly can detect the deformation degree of the first wall part and make the control system generate a deformation indication signal, so as to facilitate timely detection of the deformation degree of the first wall part.

[0036] The battery mentioned in the art can be divided into disposable battery and rechargeable battery according to whether it can be charged. Disposable battery (primary battery) is also called "throwaway" battery and primary cell, because it cannot be charged for use after its power is consumed, and can only be discarded. Rechargeable battery is also called secondary battery (secondary battery) or secondary cell, storage battery. The manufacturing materials and process of rechargeable battery are different from those of primary battery, and its advantage is that it can be used repeatedly after charging. The output current load of rechargeable battery is higher than that of most disposable batteries. The common types of rechargeable batteries at present are: lead-acid battery, nickel-hydrogen battery and lithium-ion battery. Lithium-ion battery has the advantages of light weight, large capacity (the capacity is 1.5 times to 2 times of the same weight of nickel-hydrogen battery), no memory effect, etc., and has very low self-discharge rate, so even if the price is relatively high, it is still widely used. Lithium-ion battery is also widely used in pure electric vehicles and hybrid electric vehicles. The capacity of lithium-ion battery used for such purpose is relatively low, but it has high output, charging current and long service life, but the cost is high.

[0037] The battery described in the embodiments of the present application refers to a rechargeable battery or a disposable battery. In the following, the embodiments of the present application will be mainly described by taking a lithium ion battery as an example. It should be understood that the embodiments of the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0038] The present application provides a power consuming device, which 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, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc. Among them, the power consuming device can include a battery device, and the power consuming device can provide electric energy through the battery device to realize the corresponding function.

[0039] Taking an electric vehicle as an example, the electric vehicle can include a battery device.

[0040] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application.

[0041] The vehicle 1 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or a range extended car, etc. The vehicle 1 is internally provided with a battery device 2, which can be arranged at the bottom, head or 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 the operating power supply of the vehicle 1. The vehicle 1 can also 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.

[0042] In some embodiments of the present application, the battery device 2 can not only be used as the operating power supply of the vehicle 1, but also be used as the driving power supply of the vehicle 1, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1.

[0043] In order to improve the performance of the power consuming device, the present application also provides a battery device, please refer to Figures 2-4 , Figure 2 is an exploded structural schematic diagram of a battery device according to one or more embodiments of the present application; Figure 3 is a first structural schematic diagram of a battery device according to one or more embodiments of the present application; Figure 4 is a structural schematic diagram of the first wall of the battery device exceeding the deformation degree, as shown in Figure 3 ​

[0044] To solve the above problems, the application provides a battery device 2, which comprises a box 20, a plurality of battery monomers 10, a deformation detection assembly 30 and a control system 40. The box 20 is provided with a first accommodating space 23 and comprises a first wall part 24. The plurality of battery monomers 10 are arranged in the first accommodating space 23. The deformation detection assembly 30 comprises a transmitter 31 and a receiver 32. The transmitter 31 is used for transmitting a detection light beam 34 to the receiver 32 along a preset transmission path 33. The first wall part 24 is deformed to the outside of the first accommodating space 23 under the expansion of the plurality of battery monomers 10. The deformation direction of the first wall part 24 is arranged to intersect the transmission path 33. The intensity of the detection light beam 34 transmitted along the transmission path 33 is changed at least after the deformation of the first wall part 24 exceeds a predetermined degree. The control system 40 is connected with the receiver 32 and generates a deformation indication signal based on the detection signal of the receiver 32.

[0045] The shape of the battery device 2 can include but is not limited to a square cylinder or any other shape.

[0046] In some embodiments, the battery device 2 can comprise a box 20 and a plurality of battery monomers 10 accommodated in the box 20. The box 20 is used for providing a first accommodating space 23 for the plurality of battery monomers 10. The box 20 can adopt various structures. In some embodiments, as shown in FIG. 1, the box 20 can comprise a first part 21 and a second part 22. The first part 21 and the second part 22 are overlapped with each other, and the first part 21 and the second part 22 jointly define the first accommodating space 23 for accommodating the plurality of battery monomers 10. Figure 2 The second part 22 can be a hollow structure with one end open, and the first part 21 can be a plate structure. The first part 21 is overlapped with the open side of the second part 22, so that the first part 21 and the second part 22 jointly define the first accommodating space 23. The first part 21 and the second part 22 can also be hollow structures with one side open. The open side of the first part 21 is overlapped with the open side of the second part 22.

[0047] The battery monomer 10 refers to the smallest unit constituting the battery device 2. In the battery device 2, the plurality of battery monomers 10 can be in series connection, parallel connection or mixed connection. The mixed connection means that the plurality of battery monomers 10 are in both series connection and parallel connection. The plurality of battery monomers 10 can be directly connected in series, parallel or mixed connection, and then the whole plurality of battery monomers 10 is accommodated in the box 20. Of course, the battery device 2 can also be in the form of a plurality of battery monomers 10 connected in series, parallel or mixed connection to form a battery module, and then a plurality of battery modules are connected in series, parallel or mixed connection to form a whole and are accommodated in the box 20. The battery device 2 can also comprise other structures, for example, the battery device 2 can also comprise a current combining component for realizing the electrical connection between the plurality of battery monomers 10.

[0048] The battery cell 10 can include a housing, an electrode assembly, and other functional components, the housing including a cap and a casing.

[0049] The cap refers to a component that covers the opening of the casing to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the cap can be adapted to the shape of the casing to fit the casing. Optionally, the cap can be made of a material with certain hardness and strength, such as an aluminum alloy, so that the cap is less likely to deform when subjected to a pressing impact, allowing the battery cell 10 to have higher structural strength and improved reliability. The cap can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect with the electrode assembly for outputting or inputting the electrical energy of the battery cell 10. In some embodiments, the electrode terminals can include a pole. The pole can include a positive pole and a negative pole for the output of current and connection with external circuits. In some embodiments, the cap can also be provided with a pressure relief device for releasing the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold value. The material of the cap can also be various, such as the material of the cap including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member can also be provided on the inner side of the cap, which can be used to isolate the electrical connection components in the casing from the cap to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0050] The casing is a component used to fit the cap to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte, and other components. The casing and the cap can be independent components, and an opening can be provided on the casing, and the cap is used to cover the opening to form the internal environment of the battery cell 10. Without limitation, the cap and the casing can also be integrated, specifically, the cap and the casing can form a common connecting surface before other components enter the casing, and when it is necessary to encapsulate the interior of the casing, the cap is used to cover the casing. The casing can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the casing can be determined according to the specific shape and size of the electrode assembly. The material of the casing can be various, such as the material of the casing including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0051] The electrode assembly is a component in which electrochemical reactions occur in the battery cell 10. One or more electrode assemblies can be contained within the case. The electrode assembly is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and an insulator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet each have a portion with active material that constitutes a main body of the electrode assembly, and a portion without active material that constitutes a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0052] As Figure 3 and Figure 4 illustrated, Figure 3 and Figure 4 may be considered as Figure 2The battery device 2 shown in the structure diagram after the first part 21 or the second part 22 of the box 20 is hidden. The box 20 is formed with a first accommodating space 23, and a plurality of battery monomers 10 are arranged in the first accommodating space 23. The box 20 can provide support and protection for the battery monomers 10. The box 20 is provided with a first wall part 24. It can be understood that the battery monomers 10 will occupy more space in the first accommodating space 23 during the expansion process, thereby extruding the first wall part 24 and causing the first wall part 24 to deform. The deformation detection assembly 30 can be used to detect the deformation degree of the first wall part 24. The deformation detection assembly 30 includes a transmitter 31 and a receiver 32. The transmitter 31 can emit a detection light beam 34 to the receiver 32 along a preset transmission path 33. The receiver 32 can receive the detection light beam 34 emitted by the transmitter 31 and can generate a detection signal according to the reception of the detection light beam 34. For example, the receiver 32 can generate different detection signals according to whether the detection light beam 34 is received, or the receiver 32 can generate different detection signals according to the different intensities of the received detection light beam 34. The detection light beam 34 can include but is not limited to visible light or invisible light. Specifically, when the detection light beam 34 is invisible light, the detection light beam 34 can be an infrared light beam. The deformation direction of the first wall part 24 intersects the transmission path 33. It can be understood that the first wall part 24 will interfere with the transmission path 33 during the deformation process in the deformation direction, thereby changing the intensity of the detection light beam 34 transmitted along the transmission path 33. For example, the first wall part 24 can shield the detection light beam 34 to a certain extent, and different degrees of deformation of the first wall part 24 will cause different degrees of shielding of the detection light beam 34, so that the receiver 32 receives detection light beams 34 with different intensities. It should be noted that the detection light beam 34 can be a single beam or multiple beams. For example, the number of detection light beams 34 can be multiple. The multiple detection light beams 34 can be located on the same plane or on different planes. Among them, the multiple detection light beams 34 located on the same plane can be parallel or intersected. Alternatively, the multiple detection light beams 34 can be located on the same plane and parallel to each other to form a detection light curtain. The detection light curtain can be arranged parallel to the main surface of the first wall part 24 facing the deformation detection assembly 30. When the number of detection light beams 34 is multiple, the deformation of the first wall part 24 beyond the predetermined degree can at least change the transmission intensity of part of the detection light beam 34 along the transmission path 33.

[0053] The predetermined degree of deformation of the first wall part 24 can be set according to actual needs. For example, the maximum deformation degree of the first wall part 24 that can meet the minimum normal operation requirement of the battery device 2 can be defined as the predetermined degree, so that it is convenient to judge that the battery device 2 enters the EOL state (EOL, end of life, battery life termination state) when the deformation detection assembly 30 detects that the deformation of the first wall part 24 exceeds the predetermined degree.

[0054] The control system 40 is connected with the receiver 32 and generates a deformation indication signal based on the detection signal of the receiver 32. The control system 40 can be configured to receive the detection signal sent by the receiver 32 and generate a deformation indication signal according to the detection signal. For example, the control system 40 can generate a deformation indication signal based on the detection signal sent by the receiver 32, which indicates that the deformation of the first wall portion 24 exceeds a predetermined degree. For example, when the predetermined degree is defined as the maximum deformation degree of the first wall portion 24 that can meet the minimum normal operation requirement of the battery device 2, the control system 40 generates a deformation indication signal to prompt the battery device 2 to enter an EOL state, so as to facilitate the user to stop using the battery device 2 in time and retire the battery device 2. In some application scenarios, the control system 40 can control the battery device 2 to enter a pre-warning protection state through the deformation indication signal. For example, the control system 40 can control the relay in the battery device 2 to switch to an open state through the deformation indication signal, so as to improve the reliability of the battery device 2. In some embodiments, the control system 40 can be a battery management system (BMS), or the control system 40 can also be a battery management unit (BMU) of the battery management system. The control system 40 can have a great influence on the normal operation, control strategy selection, charging mode selection and operating cost of the battery device 2. Whether in the discharging process or in the charging process of the battery device 2, the control system 40 can complete the real-time monitoring and fault diagnosis of the state of the battery device 2, and inform the load device controller 3 or the charger through the bus, so as to adopt a reasonable control strategy to achieve the purpose of effectively and efficiently using the battery system. The control system 40 can also be electrically and / or communicatively connected with multiple deformation detection assemblies 30 at the same time, so as to facilitate the control system 40 to monitor multiple deformation detection assemblies 30 at the same time and generate a deformation indication signal based on the detection signal of the corresponding deformation detection assembly 30.

[0055] Through the above embodiment, the transmitter 31 emits the detection light beam 34 to the receiver 32 along the preset transmission path 33, and the deformation direction of the first wall portion 24 is arranged to intersect the transmission path 33. When the deformation of the first wall portion 24 exceeds the predetermined degree, the intensity of the detection light beam 34 along the transmission path 33 can be changed, so that the control system 40 can generate a deformation indication signal based on the detection signal of the receiver 32 to prompt that the deformation degree of the first wall portion 24 exceeds the predetermined degree, thereby facilitating timely detection of the deformation degree of the first wall portion 24 and relieving the risk of misjudging the health state of the battery device 2 due to failure to timely detect that the deformation of the first wall portion 24 exceeds the predetermined degree.

[0056] In some embodiments, the first wall portion 24 is arranged to move into the transmission path 33 and block the transmission of the detection light beam 34 along the transmission path 33 after the deformation of the first wall portion 24 exceeds a predetermined degree. The first wall portion 24 can be arranged to be opaque so as to block the detection light beam 34. Exemplarily, the first wall portion 24 can be arranged to be spaced apart from the transmission path 33 and deformed towards the transmission path 33 under the compression of the battery cell 10, and as the deformation of the first wall portion 24 increases, the spacing distance D between the first wall portion 24 and the transmission path 33 gradually decreases, and when the deformation of the first wall portion 24 exceeds the predetermined degree, the spacing distance D between the first wall portion 24 and the transmission path 33 is 0, the first wall portion 24 moves into the transmission path 33 and blocks the detection light beam 34, wherein before the deformation of the first wall portion 24 exceeds the predetermined degree, the spacing distance D between the first wall portion 24 and the transmission path 33 is greater than 0, and the detection light beam 34 can be smoothly transmitted from the emitter 31 to the receiver 32, and after the first wall portion 24 moves into the transmission path 33, the detection light beam 34 is blocked by the first wall portion 24, and the receiver 32 cannot receive the detection light beam 34, so that the control system 40 generates a deformation indication signal according to the detection signal of the receiver 32. It should be noted that since the deformation degree of the first wall portion 24 is not necessarily uniformly distributed, the spacing distance D between the first wall portion 24 and the transmission path 33 can be considered as the distance between the part of the first wall portion 24 closest to the transmission path 33 and the transmission path 33. In some application scenarios, the receiver 32 can be arranged to continuously transmit the detection signal to the control system 40 in the state of receiving the detection light beam 34, and stop transmitting the detection signal to the control system 40 in response to not receiving the detection light beam 34, so that the control system 40 generates the deformation indication signal based on not receiving the detection signal sent by the receiver 32; or the receiver 32 can be arranged to not transmit the detection signal to the control system 40 in the state of receiving the detection light beam 34, and start transmitting the detection signal to the control system 40 in response to receiving the detection light beam 34, so that the control system 40 generates the deformation indication signal based on receiving the detection signal; or the receiver 32 can be arranged to transmit a first detection signal to the control system 40 in the state of receiving the detection light beam 34, and transmit a second detection signal to the control system 40 in the state of not receiving the detection light beam 34, so that the control system 40 generates the deformation indication signal based on the received second detection signal. Thus, the deformation of the first wall portion 24 can block the detection light beam 34 on the transmission path 33, so that the control system 40 can simply determine whether the deformation exceeds the predetermined degree according to whether the receiver 32 receives the detection light beam 34, and the structure is simple and the accuracy of the determination is improved.

[0057] In combination Figures 5-6 , Figure 5is a second structural schematic view of a battery device according to one or more embodiments of the present application; Figure 6 is a first structural schematic view of a battery device according to Figure 5 is a structural schematic view of a first wall portion of a battery device exceeding a deformation degree.

[0058] In some embodiments, the first wall portion 24 is provided with an extension portion 50 on a side facing away from the first accommodating space 23, the extension portion 50 moves synchronously with the first wall portion 24 and is configured to change the intensity of the detection light beam 34 along the transmission path 33 after at least the deformation of the first wall portion 24 exceeds a predetermined degree. It can be understood that the extension portion 50 is closer to the transmission path 33 than the first wall portion 24. The extension portion 50 moves synchronously with the first wall portion 24, and it can be understood that the extension portion 50 moves towards the transmission path 33 in the same direction as the first wall portion 24. For example, the extension portion 50 can be relatively fixed with the first wall portion 24, and the extension portion 50 moves towards the transmission path 33 by the same distance as the first wall portion 24, so that the deformation of the first wall portion 24 drives the extension portion 50 to move, and the intensity of the detection light beam 34 along the transmission path 33 is changed by the extension portion 50, so that the control system 40 changes the deformation indication signal based on the detection signal of the receiver 32. It can be understood that the first wall portion 24 moves towards the transmission path 33 during the deformation in the direction of the deformation, and interferes with the transmission path 33, so as to change the intensity of the detection light beam 34 along the transmission path 33. For example, the extension portion 50 can block the detection light beam 34 to a certain extent, and different degrees of deformation of the first wall portion 24 can cause the extension portion 50 to block the detection light beam 34 to different degrees, so that the receiver 32 receives detection light beams 34 with different intensities. Thus, by providing the extension portion 50, the extension portion 50 moves synchronously with the first wall portion 24 to change the intensity of the detection light beam 34, which can increase the installation distance between the deformation detection assembly 30 and the first wall portion 24, without the need to set the installation distance between the deformation detection assembly 30 and the first wall portion 24 too close, thereby reducing the assembly difficulty.

[0059] In some embodiments, the extension part 50 is arranged to move into the transmission path 33 and block the transmission of the detection beam 34 along the transmission path 33 after the deformation of the first wall part 24 exceeds a predetermined degree. The extension part 50 can be arranged to be opaque so as to block the detection beam 34. Exemplarily, the first wall part 24 can be arranged to be spaced apart from the transmission path 33, and the extension part 50 is also arranged to be spaced apart from the transmission path 33. The first wall part 24 is deformed towards the transmission path 33 under the extrusion of the battery cell 10, and the deformation of the first wall part 24 drives the extension part 50 to move towards the transmission path 33. When the deformation of the first wall part 24 exceeds the predetermined degree, the extension part 50 moves into the transmission path 33 and blocks the detection beam 34. Before the deformation of the first wall part 24 exceeds the predetermined degree, the extension part 50 is spaced apart from the transmission path 33 by a distance greater than 0, and the detection beam 34 can be transmitted from the emitter 31 to the receiver 32 smoothly. After the extension part 50 moves into the transmission path 33, the detection beam 34 is blocked by the extension part 50, and the receiver 32 cannot receive the detection beam 34, so that the control system 40 generates the deformation indication signal according to the detection signal of the receiver 32. In some application scenarios, the receiver 32 can be arranged to continuously transmit the detection signal to the control system 40 in the state of receiving the detection beam 34, and stop transmitting the detection signal to the control system 40 in response to not receiving the detection beam 34, so that the control system 40 generates the deformation indication signal based on the failure to receive the detection signal sent by the receiver 32; or the receiver 32 can be arranged to not transmit the detection signal to the control system 40 in the state of receiving the detection beam 34, and start transmitting the detection signal to the control system 40 in response to receiving the detection beam 34, so that the control system 40 generates the deformation indication signal based on the reception of the detection signal; or the receiver 32 can be arranged to transmit a first detection signal to the control system 40 in the state of receiving the detection beam 34, and transmit a second detection signal to the control system 40 in the state of not receiving the detection beam 34, so that the control system 40 generates the deformation indication signal based on the reception of the second detection signal. In this way, the deformation of the first wall part 24 can drive the extension part 50 to block the detection beam 34 on the transmission path 33, so that the control system 40 can simply determine whether the deformation exceeds the predetermined degree according to whether the receiver 32 receives the detection beam 34, and the structure is simple and the accuracy of the determination is improved.

[0060] In combination Figures 7-8 , Figure 7 is a third structural schematic view of a battery device according to one or more embodiments of the present application; Figure 8 is a third structural schematic view of a battery device according to one or more embodiments of the present application; Figure 7 is a structural schematic view of a first wall part of a battery device exceeding a deformation degree.

[0061] In some embodiments, the extension 50 is arranged to intersect the transmission path 33 and is provided with a light-transmitting region 51 and a light-blocking region 52, one of the light-transmitting region 51 and the light-blocking region 52 is located in the transmission path 33 before the deformation of the first wall portion 24 exceeds the predetermined extent, and the other of the light-transmitting region 51 and the light-blocking region 52 is located in the transmission path 33 after the deformation of the first wall portion 24 exceeds the predetermined extent. The light-transmitting region 51 can be used to transmit the detection beam 34, and the light-blocking region 52 can be used to block the detection beam 34. It can be understood that, after the deformation of the first wall portion 24 exceeds the predetermined extent, the receiver 32 changes from one of the two states of being able to receive the detection beam 34 and being unable to receive the detection beam 34 to the other state, and the control system 40 can generate the deformation indication signal based on the change in the detection signal of the receiver 32. For example, before the deformation of the first wall portion 24 exceeds the predetermined extent, the light-transmitting region 51 is located in the transmission path 33, and the receiver 32 can receive the detection beam 34, and after the deformation of the first wall portion 24 exceeds the predetermined extent, the light-blocking region 52 moves into the transmission path 33, and the receiver 32 is unable to receive the detection beam 34, and the control system 40 can generate the deformation indication signal based on the receiver 32 being unable to receive the detection beam 34. Alternatively, for example, before the deformation of the first wall portion 24 exceeds the predetermined extent, the light-blocking region 52 is located in the transmission path 33, and the receiver 32 is unable to receive the detection beam 34, and after the deformation of the first wall portion 24 exceeds the predetermined extent, the light-transmitting region 51 is located in the transmission path 33, and the receiver 32 receives the detection beam 34, and the control system 40 can generate the deformation indication signal based on the receiver 32 receiving the detection beam 34. Thus, the detection beam 34 can be transmitted through the extension 50 by the light-transmitting region 51 and blocked by the light-blocking region 52, so that the control system 40 can simply determine whether the deformation exceeds the predetermined extent according to the change of the receiver 32 from the two states of receiving the detection beam 34 and not receiving the detection beam 34, and the structure is simple, and the accuracy of the determination is improved.

[0062] In some embodiments, the extension 50 is arranged to intersect the transmission path 33, and the transmissivity of the extension 50 to the detection beam 34 is arranged to vary along the moving direction of the extension 50. It can be understood that the transmissivity of the extension 50 to the detection beam 34 can be arranged to increase or decrease along the moving direction of the extension 50. Exemplarily, the extension 50 can be made of different materials with different transmissivity to the detection beam 34 along the moving direction of the extension 50; or the extension 50 is made of the same material, and the thickness of the extension 50 along the moving direction of the extension 50 is different, so that the transmissivity of the extension 50 to the detection beam 34 is different at different thicknesses. The transmissivity of the extension 50 to the detection beam 34 is arranged to vary along the moving direction of the extension 50, so that the intensity of the detection beam 34 received by the receiver 32 varies during the deformation of the first wall portion 24, so that the control system 40 monitors the deformation degree of the first wall portion 24 in real time based on the detection beam 34 with different intensity received by the receiver 32, and generates a deformation indication signal based on the detection beam 34 received by the receiver 32 being greater than or equal to a first preset threshold or less than or equal to a second preset threshold. Exemplarily, the transmissivity of the extension 50 to the detection beam 34 increases along the moving direction of the extension 50, and when the deformation of the first wall portion 24 exceeds a predetermined degree, the intensity of the detection beam 34 received by the receiver 32 is greater than or equal to the first preset threshold, and the control system 40 generates a deformation indication signal based on the detection beam 34 received by the receiver 32 being greater than or equal to the first preset threshold. By analogy, the transmissivity of the extension 50 to the detection beam 34 decreases along the moving direction of the extension 50, and when the deformation of the first wall portion 24 exceeds a predetermined degree, the intensity of the detection beam 34 received by the receiver 32 is less than or equal to the second preset threshold, and the control system 40 generates a deformation indication signal based on the detection beam 34 received by the receiver 32 being less than or equal to the second preset threshold. Thus, the control system 40 can monitor the deformation degree in real time according to the intensity of the detection beam 34 received by the receiver 32, thereby improving the monitoring instantaneity and sensitivity of the deformation degree of the first wall portion 24, and facilitating the estimation before the deformation of the first wall portion 24 exceeds a predetermined degree.

[0063] In some embodiments, the box 20 further comprises a second wall portion 25 and a third wall portion 26, the second wall portion 25 and the third wall portion 26 are arranged side by side and spaced apart from each other, the first wall portion 24 connects the second wall portion 25 and the third wall portion 26, the emitter 31 is arranged on the second wall portion 25, and the receiver 32 is arranged on the third wall portion 26. The second wall portion 25 can provide support and protection for the emitter 31. The third wall portion 26 can provide support and protection for the receiver 32. The second wall portion 25 and the third wall portion 26 are arranged side by side and spaced apart from each other, which facilitates the emitter 31 to emit the detection light beam 34 along the transmission path 33 to the receiver 32. For example, the emitter 31 can be arranged on a main surface of the second wall portion 25 facing the third wall portion 26, and the receiver 32 can be arranged on a main surface of the third wall portion 26 facing the second wall portion 25, so that the emitter 31 and the receiver 32 are arranged opposite to each other. At the same time, the first wall portion 24 connects the second wall portion 25 and the third wall portion 26, so that the emitter 31 and the receiver 32 are fixed relative to the first wall portion 24, reducing the risk of movement of the transmission path 33 relative to the first wall portion 24 caused by factors other than deformation of the first wall portion 24. Therefore, by arranging the emitter 31 on the second wall portion 25, arranging the receiver 32 on the third wall portion 26, and connecting the second wall portion 25 and the third wall portion 26 by the first wall portion 24, the position of the first wall portion 24 and the transmission path 33 is relatively fixed under the same degree of deformation, which improves the stability of the detection light beam 34 and reduces the risk of false judgment caused by interference of the detection light beam 34.

[0064] In some embodiments, the box 20 further comprises a second accommodating space 27, and the first wall portion 24 is used to separate the first accommodating space 23 and the second accommodating space 27, and the deformation detection assembly 30 is arranged in the second accommodating space 27. The first wall portion 24 is used to separate the first accommodating space 23 and the second accommodating space 27, so as to reduce the influence of the swelling of the battery monomer 10 on the deformation detection assembly 30 in the second accommodating space 27, and then accommodate and protect the deformation detection assembly 30 through the second accommodating space 27. In some application scenarios, the battery monomer 10 swells and presses the first wall portion 24, the first wall portion 24 deforms to the side of the second accommodating space 27, so that the volume of the first accommodating space 23 increases and the volume of the second accommodating space 27 decreases, thereby providing a reserved space for the swelling of the battery monomer 10 and the deformation of the first wall portion 24 through the second accommodating space 27. Therefore, the deformation detection assembly 30 can be protected through the second accommodating space 27, and the stability and reliability of the deformation detection assembly 30 are improved.

[0065] In some embodiments, the plurality of battery cells 10 are arranged in an array in the first accommodating space 23, the box 20 has a first reference direction x1 arranged along the interval direction of the second wall portion 25 and the third wall portion 26, and a second reference direction x2 perpendicular to the first reference direction x1, in the second reference direction x2, the first wall portion 24 is arranged outside the plurality of battery cells 10, and each battery cell 10 has a dimension along the first reference direction x1 greater than a dimension along the second reference direction x2. It should be noted that the battery cell 10 can expand in any direction, so the battery cell 10 will press other wall portions in addition to the first wall portion 24, such as the second wall portion 25 and the third wall portion 26, thereby causing the second wall portion 25 and the third wall portion 26 to deform. However, due to the arrangement of the electrode assembly and other components inside the battery cell 10, the deformation amount of the side with a larger dimension of the battery cell 10 is generally greater than the deformation amount of the side with a smaller dimension of the battery cell 10. For example, for a square battery cell 10, the deformation amount of the side wall with a larger area of the battery cell 10 is greater than the deformation amount of the side wall with a smaller area of the battery cell 10. Therefore, by arranging the plurality of battery cells 10 in an array in the first accommodating space 23, and each battery cell 10 has a dimension along the first reference direction x1 greater than a dimension along the second reference direction x2, the two side walls of each battery cell 10 with a greater deformation amount are arranged to face the second reference direction x2, i.e., the first wall portion 24 bears a greater expansion force from the battery cell 10 than the other wall portions. For example, the first wall portion 24 bears a greater expansion force from the battery cell 10 than the second wall portion 25 or the third wall portion 26, thereby causing the deformation amount of the first wall portion 24 to be greater than the deformation amount of the second wall portion 25 and the third wall portion 26, and the deformation degree of the first wall portion 24 is greater than the deformation degree of the other wall portions, thereby more accurately reflecting the deformation of the box 20. Thus, by arranging the battery cells 10 in a specific manner, the two sides of the battery cell 10 with a relatively greater expansion are arranged along the second reference direction x2, the deformation amount of the first wall portion 24 is greater than the deformation of the second wall portion 25 and the third wall portion 26, the structural stability of the deformation detection assembly 30 is improved, and the first wall portion 24 with a greater deformation is detected, thereby more accurately reflecting the deformation of the box 20.

[0066] In summary, the battery device 2 provided by the application comprises a box body 20, a plurality of battery monomers 10, a deformation detection assembly 30 and a control system 40. The box body 20 is provided with a first accommodating space 23 and comprises a first wall portion 24. The plurality of battery monomers 10 are arranged in the first accommodating space 23. The deformation detection assembly 30 comprises an emitter 31 and a receiver 32. The emitter 31 is used for emitting a detection light beam 34 to the receiver 32 along a preset transmission path 33. The first wall portion 24 is deformed to the outside of the first accommodating space 23 under the expansion of the plurality of battery monomers 10. The deformation direction of the first wall portion 24 is arranged to intersect the transmission path 33. The intensity of the detection light beam 34 transmitted along the transmission path 33 is changed at least after the deformation of the first wall portion 24 exceeds a predetermined degree. The control system 40 is connected with the receiver 32 and generates a deformation indication signal based on the detection signal of the receiver 32. In this way, the emitter 31 emits the detection light beam 34 to the receiver 32 along the preset transmission path 33. The deformation direction of the first wall portion 24 is arranged to intersect the transmission path 33. When the deformation of the first wall portion 24 exceeds a predetermined degree, the intensity of the detection light beam 34 along the transmission path 33 can be changed. Therefore, the control system 40 can generate a deformation indication signal based on the detection signal of the receiver 32 to prompt that the deformation of the first wall portion 24 exceeds a predetermined degree. In this way, the degree of deformation of the first wall portion 24 can be detected in time. The risk that the health status of the battery device 2 is misjudged due to the failure to detect that the deformation of the first wall portion 24 exceeds a predetermined degree in time is alleviated. Compared with other types of battery devices, the battery device 2 provided by the application has higher reliability.

[0067] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they 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 application, and they should be covered in the scope of the claims and the specification of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body provided with a first accommodating space and comprising a first wall portion; a plurality of battery cells arranged in the first accommodating space; a deformation detection assembly comprising a transmitter and a receiver, the transmitter being configured to emit a detection light beam to the receiver along a preset transmission path, wherein the first wall portion is deformed outward of the first accommodating space under the swelling effect of the plurality of battery cells, the deformation direction of the first wall portion intersects the transmission path, and the intensity of the detection light beam transmitted along the transmission path is changed after the deformation of the first wall portion exceeds a predetermined degree; a control system connected with the receiver and configured to generate a deformation indication signal based on a detection signal of the receiver, wherein the detection signal of the receiver changes with the intensity of the received detection light beam.

2. The battery device according to claim 1, characterized by The first wall portion is arranged to move into the transmission path and block the transmission of the detection light beam along the transmission path after the deformation of the first wall portion exceeds the predetermined degree.

3. The battery device of claim 1, wherein An extension portion is arranged on the first wall portion on a side facing away from the first accommodating space, the extension portion moves synchronously with the deformation of the first wall portion, and is configured to change the intensity of the detection light beam transmitted along the transmission path after at least the deformation of the first wall portion exceeds the predetermined degree.

4. The battery device of claim 3, wherein The extension portion is arranged to move into the transmission path and block the transmission of the detection light beam along the transmission path after the deformation of the first wall portion exceeds the predetermined degree.

5. The battery device of claim 3, wherein The extension portion intersects the transmission path, and is provided with a light transmission area and a light blocking area, one of the light transmission area and the light blocking area is located in the transmission path before the deformation of the first wall portion exceeds the predetermined degree, and the other of the light transmission area and the light blocking area is located in the transmission path after the deformation of the first wall portion exceeds the predetermined degree.

6. The battery device of claim 3, wherein The extension portion intersects the transmission path, and the transmittance of the extension portion to the detection light beam changes along the moving direction of the extension portion.

7. The battery device according to any one of claims 1 to 6, wherein The box body further comprises a second wall portion and a third wall portion, the second wall portion and the third wall portion are arranged side by side and spaced apart from each other, the first wall portion connects the second wall portion and the third wall portion, the transmitter is arranged on the second wall portion, and the receiver is arranged on the third wall portion.

8. The battery device of claim 7, wherein, The box body is further provided with a second accommodating space, the first wall portion is configured to separate the first accommodating space and the second accommodating space, and the deformation detection assembly is arranged in the second accommodating space.

9. The battery device of claim 7, wherein, The plurality of battery cells are arranged in the first accommodating space in an array manner, the box body has a first reference direction arranged along the spacing direction of the second wall portion and the third wall portion, and a second reference direction perpendicular to the first reference direction, the first wall portion is arranged outside the plurality of battery cells in the second reference direction, and each battery cell has a dimension along the first reference direction greater than a dimension along the second reference direction.

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

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