Battery device and electric equipment
By incorporating force application and control components into the battery device and utilizing tracer gas concentration detection, safe control of solid-state batteries during leakage is achieved, solving the problems of thermal runaway and hazardous gases caused by solid-state battery leakage and improving safety performance.
Patent Information
- Application Number
- CN202423046173.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Solid-state batteries are prone to thermal runaway or the generation of dangerous gases when leaked, which affects their performance.
A force application component and a control component are installed in the battery device. By detecting the concentration of tracer gas, the force application component is controlled to switch between a first position and a second position to ensure that the battery stops charging and discharging in time when leakage occurs.
This improves the safety performance of solid-state batteries during leaks, ensuring that the battery device stops charging and discharging in time during leaks to prevent thermal runaway and the generation of dangerous gases.
Smart Images
Figure CN223757539U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of batteries, in particular to a battery device and a power consumption equipment. BACKGROUND
[0002] During the cycle use of the solid-state battery, leakage may occur, at this time, the internal materials of the solid-state battery monomer are in contact with the atmosphere, which is easy to cause thermal runaway, and the electrolyte of part of the solid-state battery monomer is sulfide electrolyte, which is easy to produce dangerous gas when in contact with the atmosphere, thereby affecting the use performance of the solid-state battery. CONTENT OF THE UTILITY MODEL
[0003] Therefore, it is necessary to provide a battery device and a power consumption equipment in view of the problem that the solid-state battery is easy to cause thermal runaway or produce dangerous gas when leakage occurs, thereby affecting the use performance of the solid-state battery.
[0004] In a first aspect, the present application provides a battery device, comprising a box body, a solid-state battery monomer, a force applying assembly and a control assembly, the box body has a containing cavity; the solid-state battery monomer is arranged in the containing cavity, and the inside of the solid-state battery monomer is filled with tracer gas; the force applying assembly is movably arranged on the box body and has a first position for pressing against the solid-state battery monomer and a second position for separating from the solid-state battery monomer; the control assembly is arranged on the box body and is in communication connection with the force applying assembly, and the control assembly is configured to control the force applying assembly to switch from the first position to the second position when the concentration of the tracer gas in the containing cavity reaches a preset value, so as to stop the charging and discharging of the battery device.
[0005] Through the above structure, on the one hand, when the battery device is normally working, the force applying assembly is in the first position and can exert a pre-tightening force on the solid-state battery monomer, so that the positive and negative electrode sheets and the electrolyte layer in the solid-state battery monomer are tightly attached under the action of the pre-tightening force, so that the solid-state battery monomer can be more stably cycled. On the other hand, when leakage occurs, the control assembly can timely control the force applying assembly to switch to the second position and cancel the pre-tightening force on the solid-state battery monomer, so that the solid-solid contact interface between the electrode sheets and the electrolyte layer in the solid-state battery monomer is separated, so that the battery device can timely stop charging and discharging, thereby improving the safety performance of the solid-state battery when leakage occurs.
[0006] In some embodiments, the solid-state battery monomer includes a plurality of solid-state battery monomers, each solid-state battery monomer is arranged along the thickness direction thereof, and the force applying assembly is movably arranged on the box body along the arrangement direction of each solid-state battery monomer; in the first position, the force applying assembly is pressed against the solid-state battery monomer along the arrangement direction.
[0007] Through the above structure, the force applying assembly can provide pre-tightening force to each solid-state battery monomer arranged and disposed simultaneously, so that the use performance of each solid-state battery monomer is more stable. At the same time, when the force applying assembly withdraws the pre-tightening force, the pre-tightening force on all solid-state battery monomers disappears, so that the solid-solid contact interface between the pole piece and the electrolyte layer of each solid-state battery monomer is separated, so that the battery device can stop charging and discharging in time.
[0008] In some embodiments, the force applying assembly includes a gas cylinder in communication connection with the control assembly, the gas cylinder is movably arranged on the box body along the arrangement direction, and is configured to be controlled by the control assembly to switch between the first position and the second position.
[0009] By arranging the gas cylinder, the switching between the first position and the second position can be better, and the mutual pressing of each solid-state battery monomer or the mutual separation of the solid-state battery monomers can be better, so as to timely respond when the solid-state battery monomer leaks and control the battery device to stop charging and discharging.
[0010] In some embodiments, the gas cylinder is arranged on the box wall of the box body along the arrangement direction, and has a first end located in the accommodating cavity and a second end located outside the accommodating cavity; wherein the first end is arranged corresponding to the center position of the large surface of the solid-state battery monomer.
[0011] Through the above structure, the pre-tightening force received by the solid-state battery monomer can be more uniform, and the stress stability can be improved.
[0012] In some embodiments, the battery device further comprises a detection assembly arranged on the box body, the detection assembly is in communication connection with the control assembly, and is used for detecting the concentration of the tracer gas in the accommodating cavity; wherein the detection assembly is configured to transmit a prompt signal to the control assembly when the concentration of the tracer gas in the accommodating cavity reaches a preset value.
[0013] By arranging the detection assembly, the concentration and change of the tracer gas in the accommodating cavity can be detected in time, so as to more accurately monitor the leakage of the battery device and improve the detection and control accuracy.
[0014] In some embodiments, a pressure relief port is formed in the box wall of the box body and communicates with the accommodating cavity, and the detection assembly is arranged at the pressure relief port.
[0015] Therefore, by arranging the detection assembly at the pressure relief port, the concentration of the tracer gas in the accommodating cavity can be better detected, and the detection accuracy can be improved.
[0016] In some embodiments, the control assembly includes a battery management system arranged in the accommodating cavity, the battery management system is in communication connection with the detection assembly and the force applying assembly respectively, and is configured to receive the prompt signal and control the force applying assembly to switch between the first position and the second position.
[0017] Through the above structure, the movement of the force applying assembly can be controlled more timely and conveniently to control the normal working or stop charging and discharging of the solid-state battery cell.
[0018] In some embodiments, the solid-state battery cell comprises a shell and an electrode assembly arranged inside the shell, the electrode assembly comprising a first pole piece, an electrolyte layer and a second pole piece arranged in layers, the electrolyte layer having a first surface and a second surface arranged oppositely, the first surface being fixedly connected with a side surface of the first pole piece;
[0019] When the force applying assembly is located at the first position, the second surface is attached to the second pole piece;
[0020] When the force applying assembly is located at the second position, the second surface is separated from the second pole piece.
[0021] Through the above structure, the attachment or separation between the electrolyte layer and the second pole piece can be smoothly realized under the action of the force applying assembly, so as to flexibly control the charging and discharging and stop charging and discharging of the solid-state battery cell.
[0022] In some embodiments, the tracer gas comprises one or more of helium, argon, nitrogen and hydrogen. In this way, the tracer gas is easier to be detected, so as to more accurately reflect the leakage of the solid-state battery cell and improve the use performance of the battery device.
[0023] In a second aspect, the application also provides a power consumption device comprising the battery device as described above.
[0024] The above battery device and power consumption device can press the solid-state battery cell when the force applying assembly is located at the first position in the initial state, apply a pre-tightening force on the solid-state battery cell, make the pole piece and the electrolyte layer in the solid-state battery cell more closely attached, and make the solid-state battery cell more fully circulate. In addition, the tracer gas is filled in the interior of the solid-state battery cell, when the solid-state battery cell leaks, the tracer gas is discharged into the accommodating cavity, when the concentration of the tracer gas in the accommodating cavity reaches or exceeds the preset value, the control assembly can timely control the force applying assembly to switch from the first position to the second position, cancel the pre-tightening force on the solid-state battery cell, separate the solid-solid contact interface between the pole piece and the electrolyte layer in the solid-state battery cell, and make the battery device stop charging and discharging in time. Therefore, the safety performance of the solid-state battery when leaking is improved. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of the battery device according to one or more embodiments.
[0026] Figure 2 It is a structural schematic diagram of the solid-state battery cell in the battery device according to one or more embodiments.
[0027] Figure 3 A structural schematic diagram of an electrode assembly in a battery device according to one or more embodiments.
[0028] Figure 4 A structural schematic diagram of an electrode assembly in a battery device according to one or more embodiments.
[0029] The reference signs: 100, battery device; 10, case; 20, solid-state battery cell; 30, detection assembly; 40, force application assembly; 11, accommodating cavity; 12, pressure relief port; 21, housing; 22, electrode assembly; 23, first electrode plate; 24, electrolyte layer; 25, second electrode plate; 41, air cylinder; a, arrangement direction. DETAILED DESCRIPTION
[0030] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated that there are many alternate embodiments that come within the scope of the present application. Accordingly, it is not intended that the present application be limited, for example, to the specific embodiments described.
[0031] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0032] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, the features limited by "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0033] In the present application, unless specifically defined otherwise, if there is any appearance of the terms "mount", "connect", "connection", "fix", and the like, these terms should be interpreted 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, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0034] In the present application, unless specifically defined otherwise, if there is any appearance of the terms "mount", "connect", "connection", "fix", and the like, these terms should be interpreted 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, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0035] It should be noted that if an element is referred to as "fixed to" or "disposed to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.
[0036] At present, from the development of market situation, the application of battery is more and more widely. 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 applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.
[0037] The traditional battery monomer usually includes a shell and an electrode assembly arranged inside the shell. The shell wraps the electrode assembly, and the electrolyte is filled in the shell, so that the electrode assembly can be fully soaked in the electrolyte.
[0038] Compared with the traditional battery monomer, the electrolyte in the solid-state battery monomer is replaced by a solid-state electrolyte layer, and the electrolyte layer is clamped between the positive and negative electrode sheets. The solid-state battery monomer has higher safety and higher energy density, so it has been more and more widely used.
[0039] For a solid-state battery cell, a positive electrode sheet, an electrolyte layer, and a negative electrode sheet are sequentially stacked to form an electrode assembly. That is, the electrolyte layer and the positive and negative electrode sheets are in surface contact in a solid-solid manner. Therefore, it is necessary to enable the electrolyte layer to be closely attached to the positive and negative electrode sheets on both sides, respectively, and to enable the electrolyte layer to stably contact the positive and negative electrode sheets.
[0040] During the cycle use of a solid-state battery cell, leakage may occur, at which time the internal materials of the solid-state battery cell are in contact with the atmosphere and are prone to thermal runaway. In addition, the electrolyte of some solid-state battery cells is a sulfide electrolyte, which is prone to produce dangerous gases such as hydrogen sulfide after being in contact with the atmosphere when leakage occurs, affecting the use performance of the solid-state battery.
[0041] Based on the above considerations, in order to solve the problem that the solid-state battery is prone to thermal runaway or is prone to produce dangerous gases when leakage occurs, affecting the use performance of the solid-state battery, one or more embodiments of the present application provide a battery device, which, in an initial state, is capable of pressing against a solid-state battery cell when a force applying assembly is at a first position, applying a pre-tightening force on the solid-state battery cell, so that the electrode sheets and the electrolyte layer in the solid-state battery cell are more closely attached, and the cycle of the solid-state battery cell is more sufficient. In addition, a tracer gas is filled in the interior of the solid-state battery cell, and when the solid-state battery cell leaks, the tracer gas is discharged into a containing cavity. When the concentration of the tracer gas in the containing cavity reaches or exceeds a preset value, a control assembly can timely control the force applying assembly to switch from the first position to a second position, cancel the pre-tightening force on the solid-state battery cell, and separate the solid-solid contact interface between the electrode sheets and the electrolyte layer in the solid-state battery cell, so that the battery device can be stopped from charging and discharging in time, thereby improving the safety performance of the solid-state battery when leakage occurs.
[0042] It should be noted that the battery device (Battery Apparatus) mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include a plurality of battery cells connected in series, in parallel, or in a mixed manner through a busbar component.
[0043] In some embodiments, the battery cell assembly (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells. As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.
[0044] In some embodiments, the battery device can be a battery pack including a box body and one or more battery cell assemblies accommodated in the box body.
[0045] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.
[0046] As an example, the battery cell assembly can also be accommodated in the box body by fixing a plurality of battery cells directly in the box body.
[0047] Referring to Figure 1 An embodiment of the present application provides a battery device 100 including a box body 10, a solid-state battery cell 20, a force applying assembly 40, and a control assembly (not shown in the figure). The box body 10 has an accommodation cavity 11, the solid-state battery cell 20 is arranged in the accommodation cavity 11, and the interior of the solid-state battery cell 20 is filled with tracer gas. The force applying assembly 40 is movably arranged on the box body 10 and has a first position pressing against the solid-state battery cell 20 and a second position separated from the solid-state battery cell 20. The control assembly is arranged on the box body 10 and is in communication connection with the force applying assembly 40, and the control assembly is configured to control the force applying assembly 40 to switch from the first position to the second position when the concentration of the tracer gas in the accommodation cavity 11 reaches a preset value, so that the battery device 100 stops charging and discharging.
[0048] It should be noted that the box body 10 refers to a structure capable of providing accommodation space for the solid-state battery cell 20 and other functional components in the battery device 100. The interior of the box body 10 has the accommodation cavity 11, and the solid-state battery cell 20 is arranged in the accommodation cavity 11, so that the box body 10 can play a certain protective role for the solid-state battery cell 20.
[0049] The box body 10 can include a box body and a cover, the box body has an opening, and the cover can be sealingly arranged at the opening of the box body to form the accommodation cavity 11 together with the box body. The solid-state battery cell 20 is placed in the interior of the box body, and then the cover is sealingly arranged at the opening of the box body to complete the assembly of the box body 10.
[0050] The solid-state battery cell 20 refers to a battery cell with solid electrolyte, i.e., the electrolyte is arranged as a solid electrolyte layer 24 and is clamped between the positive electrode sheet and the negative electrode sheet, and the solid electrolyte layer 24 is in solid contact interface with the positive and negative electrode sheets.
[0051] Specifically, the solid-state battery cell 20 comprises a shell 21 and an electrode assembly 22 arranged in the shell 21. The shell 21 forms a sealed space inside, and the electrode assembly 22 is placed inside the shell 21, which can protect the electrode assembly 22. Before the shell 21 is sealed, a tracer gas is filled into the shell 21. Specifically, the inside of the shell 21 can be first vacuumized, and then the tracer gas is filled. In this way, the inside of the shell 21 is filled with the tracer gas. When the solid-state battery cell 20 leaks, the tracer gas in the inside of the shell 21 leaks out. By detecting the tracer gas, the leakage of the solid-state battery cell 20 can be determined.
[0052] It can be understood that the tracer gas refers to a gas that can be used for detection. Due to its unique mass characteristics, it can be more easily detected and tracked, thereby providing the accuracy of the detection result.
[0053] Further, a preset value of the concentration of the tracer gas can be set according to the volume of the containing cavity 11 and other conditions. When the concentration of the tracer gas in the containing cavity 11 is lower than the preset value, it indicates that the content of the tracer gas in the containing cavity 11 is low. At this time, the battery device 100 is in a relatively safe and stable state.
[0054] When the concentration of the tracer gas in the containing cavity 11 reaches or exceeds the preset value, it indicates that the content of the tracer gas in the containing cavity 11 is high, which is most likely caused by the leakage of the solid-state battery cell 20. At this time, the battery device 100 is in a state of low safety and poor stability.
[0055] Further, the force applying assembly 40 refers to a component capable of applying a certain pressing force to the solid-state battery cell 20. The force applying assembly 40 is movably arranged relative to the box body 10, and has a first position and a second position during movement. When in the first position, the force applying assembly 40 presses against the solid-state battery cell 20 to provide a pre-tightening force to the solid-state battery cell 20. The positive and negative electrode sheets and the electrolyte layer 24 in the solid-state battery cell 20 are tightly attached under the action of the pre-tightening force, so that the solid-state battery cell 20 can be more stably recycled.
[0056] When in the second position, the force applying assembly 40 is separated from the solid-state battery cell 20, that is, the pre-tightening force on the solid-state battery cell 20 disappears, and the solid-state contact interface between the positive and negative electrode sheets and the electrolyte layer 24 is destroyed, so that the battery device 100 can stop charging and discharging in time.
[0057] The control assembly refers to a component capable of receiving the prompt signal sent by the detection assembly 30 in time and controlling the force applying assembly 40 to switch from the first position to the second position in time. In this way, the battery device 100 can stop charging and discharging in time when the solid-state battery cell 20 leaks, effectively improving the use performance of the battery device 100.
[0058] The control assembly is in communication connection with the force applying assembly 40. When the concentration of the tracer gas in the accommodation cavity 11 reaches or exceeds the preset value, the control assembly can quickly control the force applying assembly 40 to switch to the second position, so that the force applying assembly 40 is separated from the solid-state battery monomer 20, and the battery device 100 is timely stopped from charging and discharging.
[0059] Through the above structure, on the one hand, when the battery device 100 is working normally, the force applying assembly 40 is in the first position, and can exert the pre-tightening force on the solid-state battery monomer 20. The positive and negative electrode sheets in the solid-state battery monomer 20 are tightly attached to the electrolyte layer 24 under the action of the pre-tightening force, so that the solid-state battery monomer 20 can be more stably recycled. On the other hand, when leakage occurs, the control assembly can timely control the force applying assembly 40 to switch to the second position, cancel the pre-tightening force on the solid-state battery monomer 20, separate the solid-solid contact interface between the electrode sheet and the electrolyte layer 24 in the solid-state battery monomer 20, and make the battery device 100 be able to timely stop charging and discharging. Thus, the safety performance of the solid-state battery when leakage occurs is improved.
[0060] In some embodiments, the solid-state battery monomer 20 includes a plurality of solid-state battery monomers 20, each of which is arranged along the thickness direction of the solid-state battery monomer 20. The force applying assembly 40 is movably arranged on the box body 10 along the arrangement direction a of the solid-state battery monomer 20. In the first position, the force applying assembly 40 is pressed against the solid-state battery monomer 20 along the arrangement direction a.
[0061] Specifically, the solid-state battery monomer 20 usually includes a plurality of solid-state battery monomers 20, and all the solid-state battery monomers 20 are arranged in the accommodation cavity 11. The solid-state battery monomer 20 is usually arranged in a rectangular structure, wherein the solid-state battery monomer 20 includes two oppositely arranged large faces, i.e. the largest surfaces among all the surfaces of the solid-state battery monomer 20. The thickness direction of the solid-state battery monomer 20 is perpendicular to the large face, and the electrode assembly 22 is arranged in the shell 21 along the thickness direction, i.e. the thickness direction of the solid-state battery monomer 20 is also the stacking direction of the positive and negative electrode sheets and the electrolyte layer 24 inside the shell 21.
[0062] Further, each solid-state battery monomer 20 is arranged in the thickness direction in the accommodation cavity 11, i.e. the large faces of adjacent solid-state battery monomers 20 are arranged in close contact with each other. The force applying assembly 40 is movably arranged on the box body 10 along the arrangement direction a of the solid-state battery monomer 20, so that the force applying assembly 40 can be pressed against the large face of the solid-state battery monomer 20 closest to the force applying assembly 40 along the arrangement direction a.
[0063] When the force applying assembly 40 is in the first position, one end of the force applying assembly 40 is pressed against the large face of the solid-state battery cell 20 closest to the force applying assembly 40. In this way, the force applying assembly 40 applies a pre-tightening force to the entire arrangement of solid-state battery cells 20, and the solid-state battery cells 20 are pressed more closely against each other under the pre-tightening force. At the same time, the positive and negative electrode sheets in each solid-state battery cell 20 are pressed more closely against the electrolyte layer 24, and the performance of each solid-state battery cell 20 is more stable.
[0064] When the force applying assembly 40 is in the second position, the force applying assembly 40 is separated from the solid-state battery cell 20 closest to the force applying assembly 40, and the pre-tightening force on each solid-state battery cell 20 disappears. For each solid-state battery cell 20, the solid-solid contact interface between the positive and negative electrode sheets and the electrolyte layer 24 is separated, and the battery device 100 can stop charging and discharging in time.
[0065] Through the above structure, the force applying assembly 40 can provide a pre-tightening force to each solid-state battery cell 20 in the arrangement, and the performance of each solid-state battery cell 20 is more stable. At the same time, when the force applying assembly 40 removes the pre-tightening force, the pre-tightening force on all solid-state battery cells 20 disappears, and the solid-solid contact interface between the electrode sheets and the electrolyte layer 24 of each solid-state battery cell 20 is separated, so that the battery device 100 can stop charging and discharging in time.
[0066] In some embodiments, the force applying assembly 40 includes a pneumatic cylinder 41 in communication with the control assembly. The pneumatic cylinder 41 is movably arranged on the box 10 along the arrangement direction a and is configured to be controlled by the control assembly to switch between the first position and the second position.
[0067] Specifically, the pneumatic cylinder 41 is arranged on the box 10 and can move along the arrangement direction a. The control assembly can control the pneumatic cylinder 41 to switch from the first position to the second position, or to restore from the second position to the first position.
[0068] When the control assembly receives the prompt signal sent by the detection assembly 30, the control assembly controls the pneumatic cylinder 41 to switch from the first position to the second position, so that the battery device 100 stops charging and discharging. If the battery device 100 is repaired and replaced after the leakage is ruled out, the pneumatic cylinder 41 can also be restored from the second position to the first position by the control assembly to apply a pre-tightening force to each solid-state battery cell 20.
[0069] The pre-tightening force range of the cylinder 41 applied to the solid-state battery monomer 20 can be set to 2 MPa-200 MPa. When the tracer gas in the accommodation cavity 11 is detected to be excessive, the control assembly controls the cylinder 41 to switch from the first position to the second position. At this time, the pre-tightening force applied by the cylinder 41 to the solid-state battery monomer 20 gradually disappears, and the pre-tightening force decreases at a rate of 0.1 MPa / min-50 MPa / min until the battery device 100 stops charging and discharging.
[0070] By setting the cylinder 41, the switching between the first position and the second position can be better moved, and the mutual pressing or mutual separation of each solid-state battery monomer 20 can be better realized, so as to timely respond when the solid-state battery monomer 20 leaks and control the battery device 100 to stop charging and discharging.
[0071] In some embodiments, the cylinder 41 is arranged on the wall of the box 10 along the arrangement direction a and has a first end located in the accommodation cavity 11 and a second end located outside the accommodation cavity 11. The first end is arranged corresponding to the center position of the large surface of the solid-state battery monomer 20.
[0072] Specifically, the first end of the cylinder 41 located in the accommodation cavity 11 is used to press or separate the solid-state battery monomer 20, and the second end of the cylinder 41 located outside the accommodation cavity 11 can be used as an operating end to control the movement of the cylinder 41 for easy operation.
[0073] The first end of the cylinder 41 is arranged corresponding to the center position of the large surface of the solid-state battery monomer 20, and when the cylinder 41 is located at the first position, the first end presses the center of the large surface of the solid-state battery monomer 20, which can make the pre-tightening force more uniform.
[0074] Through the above structure, the pre-tightening force on the solid-state battery monomer 20 can be made more uniform, and the stability of the force can be improved.
[0075] In some embodiments, the battery device 100 further comprises a detection assembly 30 arranged on the box 10, and the detection assembly 30 is in communication connection with the control assembly and is used for detecting the concentration of the tracer gas in the accommodation cavity 11. The detection assembly 30 is configured to be able to transmit a prompt signal to the control assembly when the concentration of the tracer gas in the accommodation cavity 11 reaches a preset value.
[0076] Specifically, the detection assembly 30 refers to a structure capable of detecting the concentration of the tracer gas in the accommodation cavity 11, and the detection assembly 30 is arranged on the box 10 and can be arranged in the accommodation cavity 11 to better detect the concentration of the tracer gas in the accommodation cavity 11.
[0077] When the concentration of the tracer gas in the accommodation cavity 11 reaches or exceeds the preset value, the detection assembly 30 can timely send a prompt signal to the control assembly, so that the control assembly can make a faster response, and the control assembly controls the force applying assembly 40 to switch from the first position to the second position, and controls the battery device 100 to stop charging and discharging.
[0078] The control assembly is in communication connection with the detection assembly 30 and the force applying assembly 40 respectively, and the control assembly can receive the prompt signal sent by the detection assembly 30, and then timely controls the force applying assembly 40 to switch to the first position or the second position according to the prompt signal, so as to realize flexible control of the force applying assembly 40.
[0079] Therefore, by arranging the detection assembly 30, the concentration and change of the tracer gas in the accommodation cavity 11 can be timely detected, so as to more accurately monitor the leakage of the battery device 100 and improve the detection and control accuracy.
[0080] In some embodiments, a pressure relief port 12 communicating with the accommodation cavity 11 is arranged on the box wall of the box body 10, and the detection assembly 30 is arranged at the pressure relief port 12.
[0081] Specifically, the pressure relief port 12 is also arranged on the box wall of the box body 10, and the pressure relief port 12 communicates with the accommodation cavity 11. When the internal pressure of the box body 10 is too large, the pressure relief port 12 can be used for pressure relief and exhaust, so as to keep the internal pressure of the box body 10 stable.
[0082] Arranging the detection assembly 30 at the pressure relief port 12 can better detect the concentration of the tracer gas in the accommodation cavity 11 and improve the detection accuracy.
[0083] In some embodiments, the detection assembly 30 includes a mass spectrometry leak detector and a gas sensor.
[0084] Specifically, the detection assembly 30 can be arranged as a mass spectrometry leak detector or a gas sensor. When the tracer gas is detected by the mass spectrometry leak detector, the specification is 1E-06 Pa m / s, that is, when the detected leakage rate is greater than or equal to 1E-06 Pa m / s, it indicates that the solid-state battery monomer 20 has a leakage. 3 When the tracer gas is detected by the gas sensor, the specification is 200PPB, that is, when the detected value is greater than or equal to 200PPB, it indicates that the solid-state battery monomer 20 has a leakage. 3
[0085] When the tracer gas is detected by the gas sensor, the specification is 200PPB, that is, when the detected value is greater than or equal to 200PPB, it indicates that the solid-state battery monomer 20 has a leakage.
[0086] Through the above structure, the concentration of the tracer gas in the accommodation cavity 11 can be more accurately detected, and the accuracy of the detection result is improved.
[0087] In some embodiments, the control assembly comprises a battery management system arranged in the accommodation cavity 11, which is in communication connection with the detection assembly 30 and the force applying assembly 40 respectively, and is configured to be capable of receiving the prompt signal and controlling the force applying assembly 40 to switch between the first position and the second position.
[0088] Specifically, the battery management system (BMS) is arranged in the accommodation cavity 11 and is capable of receiving the prompt signal sent by the detection assembly 30, and is capable of controlling the force applying assembly 40 to switch from the first position to the second position or to restore from the second position to the first position according to the signal.
[0089] Through the above structure, the movement of the force applying assembly 40 can be controlled more timely and more conveniently to control the normal working or stop charging and discharging of the solid-state battery monomer 20.
[0090] Please refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the solid-state battery monomer 20 comprises a shell 21 and an electrode assembly 22 arranged inside the shell 21, the electrode assembly 22 comprises a first electrode sheet 23, an electrolyte layer 24 and a second electrode sheet 25 arranged in layers, the electrolyte layer 24 has a first surface and a second surface arranged oppositely, the first surface is fixedly connected with a side surface of the first electrode sheet 23. When the force applying assembly 40 is in the first position, the second surface is attached to the second electrode sheet 25. When the force applying assembly 40 is in the second position, the second surface is separated from the second electrode sheet 25.
[0091] Specifically, the shell 21 refers to a component capable of providing accommodation space for the electrode assembly 22 or other functional components. By arranging the electrode assembly 22 inside the shell 21, the electrode assembly 22 can be protected to a certain extent. The electrode assembly 22 comprises the first electrode sheet 23, the electrolyte layer 24 and the second electrode sheet 25 arranged in layers. Among them, the first electrode sheet 23 can be a positive electrode sheet or a negative electrode sheet. When the first electrode sheet 23 is a positive electrode sheet, the second electrode sheet 25 is a negative electrode sheet. When the first electrode sheet 23 is a negative electrode sheet, the second electrode sheet 25 is a positive electrode sheet.
[0092] During the manufacturing process of the electrode assembly 22, the first surface of the electrolyte layer 24 is fixedly connected to a side surface of the first electrode sheet 23, which can be achieved by coating or other means. In this way, the electrolyte layer 24 and the first electrode sheet 23 form a whole, and then the second electrode sheet 25 is attached to the second surface of the electrolyte layer 24 to form a layered structure.
[0093] Based on this, when the pre-tightening force is applied on the solid-state battery monomer 20, the first pole piece 23, the electrolyte layer 24 and the second pole piece 25 are tightly attached to each other, and the charging and discharging can be more stable. When the pre-tightening force on the solid-state battery monomer 20 disappears, the electrolyte layer 24 and the first pole piece 23 as a whole are easy to separate from the second pole piece 25, so that the solid-solid contact interface between the electrolyte layer 24 and the second pole piece 25 is separated, and the charging and discharging of the solid-state battery monomer 20 is stopped.
[0094] Through the above structure, the attachment or separation between the electrolyte layer 24 and the second pole piece 25 can be smoothly realized under the action of the force applying assembly 40, so as to flexibly control the charging and discharging and stop the charging and discharging of the solid-state battery monomer 20.
[0095] In some embodiments, the tracer gas includes one or more of helium, argon, nitrogen, and hydrogen.
[0096] Specifically, the tracer gas can be a mixed gas of one or more of the above-mentioned gases. For example, when the tracer gas includes helium and nitrogen, the volume ratio of helium can be set to 5% to 95%, and the remaining volume ratio is that of nitrogen.
[0097] In this way, the tracer gas is easier to be detected, so as to more accurately reflect the leakage of the solid-state battery monomer 20 and improve the use performance of the battery device 100.
[0098] Based on the same concept as the above-mentioned battery device 100, the application also provides a power-using equipment, which includes the battery device 100 as described above.
[0099] According to one or more embodiments, in specific use of the application, first, during the packaging process of the solid-state battery monomer 20, the tracer gas is filled into the inside of the shell 21. A plurality of solid-state battery monomers 20 are arranged in the accommodation cavity 11, and in the initial state, the air cylinder 41 is switched to the first position, so that the air cylinder 41 is pressed against the large face of the solid-state battery monomer 20 along the arrangement direction a, so that the solid-solid contact interface between the positive and negative pole pieces and the electrolyte layer 24 in each solid-state battery monomer 20 is tightly attached, so that each solid-state battery monomer 20 can be more stably charged and discharged.
[0100] When one or more solid-state battery monomers 20 in the battery device 100 leak, the detection assembly 30 detects that the concentration of the tracer gas in the accommodation cavity 11 reaches or exceeds the preset value, and then the detection assembly 30 sends a prompt signal to the control assembly.
[0101] After the control assembly receives the prompt signal, the control assembly quickly controls the cylinder 41 to switch from the first position to the second position, at which time the cylinder 41 is separated from the solid-state battery cell 20, the pre-tightening force on the solid-state battery cell 20 disappears, the solid-solid contact interface between the positive and negative electrode sheets and the electrolyte layer 24 is destroyed, and the battery device 100 stops charging and discharging.
[0102] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in contradictions.
[0103] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A battery device, characterized by, The battery device comprises: a box body having a containing cavity; a solid-state battery cell arranged in the containing cavity, and an inside of the solid-state battery cell being filled with a tracer gas; a force applying assembly movably arranged on the box body and having a first position for pressing against the solid-state battery cell and a second position for separating from the solid-state battery cell; and a control assembly arranged on the box body and communicatively connected with the force applying assembly, the control assembly being configured to control the force applying assembly to switch from the first position to the second position when a concentration of the tracer gas in the containing cavity reaches a preset value, so as to stop the battery device from charging and discharging. The solid-state battery cell comprises a plurality of solid-state battery cells, each of the solid-state battery cells being arranged along a thickness direction thereof, and the force applying assembly is movably arranged on the box body along an arrangement direction of the solid-state battery cells.
2. The battery device of claim 1, wherein In the first position, the force applying assembly is pressed against the solid-state battery cell along the arrangement direction. The force applying assembly comprises a pneumatic cylinder communicatively connected with the control assembly, the pneumatic cylinder being movably arranged on the box body along the arrangement direction and being configured to be controlled by the control assembly to switch between the first position and the second position.
3. The battery device of claim 2, wherein The pneumatic cylinder is arranged on a wall of the box body along the arrangement direction and has a first end located in the containing cavity and a second end located outside the containing cavity.
4. The battery device of claim 3, wherein The first end is arranged at a position corresponding to a center of a large surface of the solid-state battery cell. The battery device further comprises a detection assembly arranged on the box body, the detection assembly being communicatively connected with the control assembly and being configured to detect the concentration of the tracer gas in the containing cavity.
5. The battery device of claim 1, wherein The detection assembly is configured to send a prompt signal to the control assembly when the concentration of the tracer gas in the containing cavity reaches the preset value. The wall of the box body is provided with a pressure relief opening communicating with the containing cavity, and the detection assembly is arranged at the pressure relief opening.
6. The battery device of claim 5, wherein The control assembly comprises a battery management system arranged in the containing cavity, the battery management system being communicatively connected with the detection assembly and the force applying assembly and being configured to receive the prompt signal and control the force applying assembly to switch between the first position and the second position.
7. The battery device of claim 5, wherein The solid-state battery cell comprises a shell and an electrode assembly arranged in the shell, the electrode assembly comprising a first electrode plate, an electrolyte layer and a second electrode plate arranged in layers, the electrolyte layer having a first surface and a second surface arranged oppositely, and the first surface being fixedly connected with a side surface of the first electrode plate.
8. The battery device of claim 1, wherein When the force applying assembly is in the first position, the second surface is in contact with the second electrode plate. When the force applying assembly is in the second position, the second surface is separated from the second electrode plate. The tracer gas comprises one or more of helium, argon, nitrogen and hydrogen.
9. The battery device of claim 1, wherein, The battery device comprises any one of claims 1-9.
10. An electric device, characterized by