Self-adaptive intelligent lithium ion battery and use method

Abstract

The invention discloses a self-adaptive intelligent lithium ion battery and a use method, and relates to the technical field of lithium batteries. The battery body is provided with a positive pole and a negative pole; the detection piece is arranged in the battery body and is used for detecting the roll core temperature and / or the roll core stress value and / or the roll core local displacement parameter and / or the shell internal air pressure and / or the shell internal gas composition of the battery body; the switch piece is connected between the positive pole and the positive tab of the roll core and / or between the negative pole and the negative tab of the roll core; and the central processing unit is connected to the battery body and can open or close the switch piece according to the detection result of the detection piece. The intelligent lithium battery aims at achieving intelligentization of the lithium battery, avoiding safety accidents caused by thermal runaway or short circuit and prolonging the service life of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to an adaptive intelligent lithium-ion battery and a use method thereof. Background Art

[0002] Lithium-ion batteries are batteries that use lithium ions as the main carrier and are widely used in consumer electronics, energy storage systems, and electric vehicles. With its high energy density, long cycle life, and low self-discharge rate, lithium-ion batteries stand out among many energy storage technologies. The core structure of a lithium battery consists of a positive electrode, a negative electrode, an electrolyte, and a separator. The working principle is to achieve the mutual conversion between electrical energy and chemical energy through the embedding and de-embedding of lithium ions in the positive and negative electrode materials. This efficient energy conversion mechanism provides lithium batteries with excellent performance, making them an important part of the modern energy revolution.

[0003] In the field of electric vehicles, the high energy density of lithium batteries enables electric vehicles to achieve longer driving range within limited battery space, while its efficient energy output performance meets the strict requirements of the vehicle for power response. These advantages make lithium batteries a key driving force for the development of the electric vehicle industry.

[0004] However, when lithium batteries are discharged at high rates or work in extreme environments, they may experience local overheating, increasing the risk of thermal runaway. At the same time, when a vehicle collides or is impacted by external forces, lithium batteries may cause internal short circuits due to external squeezing or puncture, leading to electrolyte leakage, battery cell damage, or even combustion. Especially in large battery packs composed of multiple battery cells in electric vehicles, once a battery cell has a problem, it may trigger a chain reaction, threatening the safety of the entire battery pack.

[0005] The stress magnitude and local displacement changes of the battery's internal winding core will also cause changes in battery life. At the current stage of application technology, due to the volume limitation of the battery, the battery can only analyze the basis for calculation and control by externally measuring parameters such as voltage, current and temperature. There is no way to find the true state of the winding core inside the battery, resulting in many inevitable errors in judgment, evaluation and control, and even misjudgment of safety risks. Thirdly, lithium-ion batteries will produce a large amount of gas after service. This gas will not only produce a huge internal pressure in the battery shell, causing the shell to expand greatly, but also affect the battery life and safety performance; for this reason, the existing technology is designed with an explosion-proof valve. When the air pressure reaches a certain level, usually 0.5Mpa~1.1Mpa, the explosion-proof valve will be opened by the air pressure to discharge the gas, and the battery will then have completed its life cycle. At the same time, the stress magnitude of the internal winding core of the battery is the internal expansion pressure of the battery. As the number of cycles increases, the pressure continues to increase, which will also cause changes in the battery's thermal runaway safety and cycle life. When a battery has a safety incident such as thermal runaway, a large amount of heat is released in a short period of time, and the temperature of the internal ejecta can reach thousands of degrees, often accompanied by fires and explosions. Currently, there have been reports of several battery car fires and explosions and large and small energy storage power station fires each year, all of which are caused by battery safety issues, seriously threatening people's lives and property safety and the development of battery technology.

[0006] Therefore, achieving intelligent control of lithium batteries, avoiding safety accidents caused by thermal runaway or short circuit, and extending the service life of batteries have become technical problems that need to be solved urgently. Summary of the invention

[0007] The main purpose of the present invention is to provide an adaptive intelligent lithium-ion battery and a method of use, aiming to realize the intelligence of lithium batteries and improve the safety of lithium batteries, and avoid safety accidents caused by thermal runaway or short circuit.

[0008] In order to achieve the above object, the present invention provides an adaptive intelligent lithium-ion battery, comprising: The battery body, with positive and negative poles; A detection member, disposed in the battery body, for detecting the winding core temperature and / or the winding core stress value and / or the winding core local displacement parameter and / or the internal air pressure and / or the internal gas composition of the shell of the battery body; A switch element connected between the positive electrode column and the positive electrode tab of the winding core and / or between the negative electrode column and the negative electrode tab; and The central processing unit is connected to the battery body and can open or close the switch element according to the detection result of the detection element.

[0009] By setting up detection components inside the battery body, the key operating parameters of the winding core can be obtained in real time, and the real state of the battery can be fully understood; by analyzing data and controlling the switch components through the central processing unit, power-off measures can be quickly taken when the battery is abnormal, thereby effectively avoiding safety hazards such as thermal runaway and short circuit; through the control of the switch components, the self-isolation function of the single battery can be realized, thereby ensuring that other batteries continue to operate normally. Improve the safety of lithium batteries and avoid safety accidents caused by thermal runaway or short circuit.

[0010] In one embodiment of the present application, the battery body comprises: A shell, the positive electrode column and the negative electrode column are arranged on the shell, and the shell is provided with an electrolyte; and The winding core is arranged in the shell.

[0011] The high-strength packaging of the shell provides a stable and safe working environment for the winding core. The uniform distribution of the electrolyte ensures the efficiency of ion conduction and improves the energy conversion capacity of the battery body. The positive and negative poles are arranged outside the shell, making it easy to connect the battery body to the external circuit. The structure is simple and easy to implement.

[0012] In one embodiment of the present application, an electronic explosion-proof valve is provided on the shell, and the central processing unit can open or close the electronic explosion-proof valve according to the detection result of the detection element.

[0013] By installing an electronic explosion-proof valve on the shell and controlling it with a central processing unit, intelligent management of the gas pressure inside the battery can be achieved. When the detection component detects an abnormal signal, the central processing unit can respond quickly and open the electronic explosion-proof valve to promptly eliminate the internal gas pressure and release negative reaction gases, thereby extending the battery life and preventing the shell from bulging or bursting due to excessive internal pressure.

[0014] In one embodiment of the present application, the winding core is further provided with a deformable core box which can absorb or release heat from the winding core.

[0015] By setting a deformable core box at the center of the core of the battery body, the heat during the battery operation process can be effectively regulated, thereby avoiding battery performance degradation or safety hazards caused by excessively high or low temperatures. At the same time, the deformable core box can effectively absorb the expansion requirements of the core during charging and discharging by using its own deformation function, and effectively balance the internal stress of the battery during operation. Combined with the heat absorption and release function of the deformable core box, it can effectively extend the service life of the battery, prevent aging of the internal materials of the battery or structural damage caused by excessive fluctuations in temperature and internal stress, thereby improving the battery's cycle performance and safety.

[0016] In one embodiment of the present application, at least one support bar is provided in the deformable core box for supporting the deformable core box to improve the support strength of the deformable core box.

[0017] The addition of the support bar improves the support strength of the deformable core box, enabling it to withstand more external forces and internal pressures, and prevents the deformable core box from deformation or damage under high temperature and high rate discharge conditions, thereby ensuring the stable performance of the battery's thermal regulation function. At the same time, the design of the support bar enhances the durability of the deformable core box during long-term use, prolongs the battery's service life, and reduces battery failure caused by damage to the deformable core box.

[0018] In one embodiment of the present application, the support bar is at least one of a straight line, an S-shape, and a broken line. The straight line support bar is a simple linear structure, which is relatively long and arranged in a straight line. It is evenly distributed on the inner wall of the deformable core box to provide a balanced support force. The straight line support bar is suitable for situations where the structure of the deformable core box is relatively regular and the force is relatively uniform. The connection method of the straight line support bar can be fixed to the inner wall of the deformable core box by integral molding, welding, bonding or embedding, ensuring that the support bar forms a stable connection with the deformable core box, so that the support bar can effectively disperse the pressure from the inside and outside, and enhance the mechanical strength of the deformable core box. The straight line support bar has a simple structure and a low manufacturing cost.

[0019] The S-shaped support bar is a curved structure composed of multiple curved segments, shaped like the letter "S". This shape of support bar can better adapt to the complex spatial layout inside the battery while providing support force. The S-shaped support bar can form a more complex support network inside the deformable core box, enhancing the stability of the deformable core box in multiple directions. The connection method of the S-shaped support bar can be connected to the inner wall of the deformable core box through one-piece molding, fixings or welding, ensuring that it will not loosen or fall off under thermal expansion and pressure changes. Due to the curved design of the S-shaped support bar, it can effectively disperse the forces from all directions and enhance the compression and deformation resistance of the deformable core box.

[0020] The zigzag support bar is formed by connecting multiple straight line segments at angles. The zigzag support bar not only retains the simplicity of the straight line support bar, but also increases the flexibility and adaptability of the support bar through multiple folding angles. The zigzag support bar can provide better support in a limited space while reducing the risk of damage caused by uneven pressure.

[0021] In one embodiment of the present application, at least one pressure relief port is provided on the deformable core box. By providing a pressure relief port at the top and / or bottom of the deformable core box, the safety and stability of the deformable core box are improved. The design of the pressure relief port ensures that when the battery is over-expanded or the internal gas pressure is too high, the deformable core box can release part of the pressure, thereby reducing the risk of thermal runaway of the battery.

[0022] The present application also discloses a method for using an adaptive intelligent lithium-ion battery, comprising the following steps: Connecting the positive electrode post and the negative electrode post of the adaptive intelligent lithium-ion battery to an external circuit; Real-time monitoring of the temperature, stress value and / or local displacement parameter of the winding core in the battery body and / or the internal air pressure and / or the internal gas composition of the shell by the detection element; The central processing unit determines whether the working state of the battery is abnormal according to the parameter value detected by the detection element; When an abnormal state is detected, the central processing unit controls the switch to disconnect the positive electrode post and the positive electrode tab of the winding core and / or the negative electrode post and the negative electrode tab to protect the safety of the battery body; or when an abnormal state is detected, the central processing unit controls the electronic explosion-proof valve to release the internal gas of the battery and balance the internal and external air pressure to extend the battery life and protect the safety of the battery body.

[0023] After the detection parameters return to a normal state, the central processing unit may reclose the switch element and / or close the electronic explosion-proof valve to restore the normal working state of the battery.

[0024] By adopting the above technical solution, by setting up detection components inside the battery body, the key operating parameters of the core can be obtained in real time, and the real state of the battery can be fully understood; by the central processing unit analyzing data and controlling the switch components, power-off measures can be quickly taken when the battery is abnormal, thereby effectively avoiding safety hazards such as thermal runaway and short circuit; through the control of the switch components, the self-isolation function of the single cell can be achieved, thereby ensuring that other batteries continue to operate normally; by the central processing unit analyzing data and controlling the electronic explosion-proof valve, negative reaction gases can be discharged, thereby extending the battery life and improving the safety of the lithium battery, avoiding safety accidents caused by thermal runaway or short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of a first embodiment of the present invention; Figure 2 A side sectional view of a first embodiment of the present invention; Figure 3 A ground cross-sectional view of a first embodiment of the present invention; 10. Shell; 11. Positive pole; 12. Negative pole; 20. Central processing unit; 30. Switch component; 40. Detection component; 50. Electronic explosion-proof valve; 60. Winding core; 61. Positive pole ear; 62. Negative pole ear; 70. Deformable core box; 71. Support bar; 72. Pressure relief port. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0027] like Figures 1 to 3 As shown, in order to achieve the above-mentioned purpose, the present invention proposes an adaptive intelligent lithium-ion battery, comprising: The battery body has a positive electrode post 11 and a negative electrode post 12; The detection member 40 is disposed in the battery body and is used to detect the temperature of the winding core 60 of the battery body and / or the stress value of the winding core 60 and / or the local displacement parameter of the winding core 60 and / or the internal air pressure of the shell 10 and / or the internal gas composition of the shell 10; The switch element 30 is connected between the positive electrode column 11 and the positive electrode tab 61 of the winding core 60 and / or between the negative electrode column 12 and the negative electrode tab 62; and The central processing unit 20 is connected to the battery body and can open or close the switch element 30 according to the detection result of the detection element 40.

[0028] Specifically, The battery body includes a positive electrode column 11 and a negative electrode column 12, which are used to connect the battery to an external circuit. The battery body also includes a winding core 60, which is the main place for energy storage and is the matrix of positive and negative electrode materials and electrochemical reactions.

[0029] The detection member 40 is disposed inside the battery body and is used to monitor key operating parameters of the battery body, including the temperature of the core 60, the stress value of the core 60, the local displacement parameter of the core 60, the internal air pressure of the shell 10, and the internal gas composition of the shell 10. The detection member 40 can be an optical fiber sensor or other types of sensors. When the detection member 40 is an optical fiber sensor, the optical fiber sensor obtains real-time data by sensing physical changes in different parts inside and outside the core 60. The detection member 40 is directly connected to the central processing unit 20, and the detected parameters are uploaded to the central processing unit 20 through data transmission.

[0030] The switch 30 is installed between the positive pole 11 and the positive pole ear 61 of the winding core 60 and / or between the negative pole 12 and the negative pole ear 62, and serves as a controller of the current path. The switch 30 controls the connection and disconnection of the positive pole 11 and the negative pole 12, thereby realizing the operation management and safety control of the battery. The switch 30 is electrically connected to the central processing unit 20, and its opening and closing state is completely controlled by the command of the central processing unit 20.

[0031] The electronic explosion-proof valve 50 is installed on the battery housing and serves as a valve for gas discharge and is controlled by the central processing unit 20 .

[0032] The central processing unit 20 is fixed on the battery body and plays the role of information collection, calculation processing and execution of instructions. The central processing unit 20 receives the detection signal from the detection member 40, analyzes the temperature, stress, displacement of the winding core 60 and the key parameters such as the internal air pressure and gas composition of the battery in real time, and judges whether there is a potential safety risk according to the preset logical conditions. When the parameters fed back by the detection member 40 are abnormal, the central processing unit 20 sends a command to the switch member 30 to open or close the current path between the positive pole 11 and the positive pole ear 61 of the winding core 60 and / or between the negative pole 12 and the negative pole ear 62; or when the parameters fed back by the detection member 40 are abnormal, the central processing unit 20 sends a command to the electronic explosion-proof valve 50 to open or close the electronic explosion-proof valve, remove negative reaction gas and balance the internal and external air pressure to extend the battery life and protect the battery safety. The central processing unit 20 can also be connected to a battery management system or other external control device to achieve more comprehensive battery status management. The central processing unit 20 can also be connected to the positive pole 11 and / or the negative pole, the switch 30 to obtain working power, or connected to an external circuit and / or a built-in power supply to obtain working power.

[0033] By adopting the above technical solution, by setting the detection component 40 inside the battery body, the key operating parameters of the winding core 60 can be obtained in real time, and the real state of the battery can be fully understood; by the central processing unit 20 analyzing the data and controlling the switch component 30, power-off measures can be quickly taken when the battery is abnormal, thereby effectively avoiding safety hazards such as thermal runaway and short circuit; through the control of the switch component 30, the self-isolation function of the single battery can be realized, thereby ensuring that other batteries continue to operate normally. The opening and closing of the electronic explosion-proof valve 50 is controlled by the central processing unit 20 to discharge negative reaction gases to extend the battery life. Overall, the lithium battery is intelligentized and the safety of the lithium battery is improved to avoid safety accidents caused by thermal runaway or short circuit.

[0034] In one embodiment of the present application, the battery body comprises: A housing 10, wherein the positive electrode column 11 and the negative electrode column 12 are disposed on the housing 10, and an electrolyte is disposed in the housing 10; and The winding core 60 is disposed in the housing 10 .

[0035] Specifically, the shell 10 is used to protect and contain the internal structure, and is an important support and packaging component of the battery body. The positive pole 11 and the negative pole 12 are mounted on the shell 10 and extend to the inside of the shell 10, and are used to connect the tabs of the core 60. The positive pole 11 and the positive pole tab 61 of the core 60 are opposite, and the negative pole 12 and the negative pole tab 62 of the core 60 are opposite. The interior of the shell 10 is filled with electrolyte, and the electrolyte covers and penetrates into the internal core 60, providing the necessary ion conductive medium for the electrochemical reaction inside the battery. The shell 10 is made of high-strength materials, such as metal steel, which can effectively prevent electrolyte leakage and provide a safe working environment for the core 60.

[0036] The core 60 is located inside the shell 10 and is the energy storage core of the battery body. It contains a stacked structure of positive and negative electrode materials. The positive and negative electrodes are separated by a diaphragm to prevent short circuits and ensure the free migration of ions. The core 60 fits tightly with the internal space of the shell 10. The positive electrode tab 61 of the core 60 is connected to the positive electrode column 11 through a conductive connection, and the negative electrode tab 62 is connected to the negative electrode column 12 through a conductive connection to form a complete current loop. The design of the core 60 is usually a spiral winding or stacked structure to optimize its volume utilization and energy density.

[0037] The switch 30 is installed between the positive pole 11 and the positive pole tab 61 of the winding core 60 and / or between the negative pole 12 and the negative pole tab 62, and serves as a controller of the current path. The switch 30 controls the connection and disconnection of the positive pole 11 and the negative pole 12, thereby achieving operation management and safety control of the battery.

[0038] The shell 10 and the winding core 60 form a complete closed system. The electrolyte inside the shell 10 is in full contact with the positive and negative electrode materials of the winding core 60 to support the charging and discharging process of the battery. The positive electrode column 11 and the negative electrode column 12 are fixed on the shell 10 to achieve reliable connection between the internal and external circuits of the battery, ensuring the stability of the electrical performance of the battery body.

[0039] The above technical solution provides a stable and safe working environment for the winding core 60 through the high-strength packaging of the shell 10, and the uniform distribution of the electrolyte ensures the efficiency of ion conduction and improves the energy conversion capacity of the battery body. The positive electrode column 11 and the negative electrode column 12 are arranged outside the shell 10, so that the battery body is easy to connect to the external circuit. The structure is simple and easy to implement.

[0040] In one embodiment of the present application, an electronic explosion-proof valve 50 is disposed on the housing 10 , and the central processing unit 20 can open or close the electronic explosion-proof valve 50 according to the detection result of the detection element 40 .

[0041] Specifically, the electronic explosion-proof valve 50 is installed on the housing 10, located at the top or side of the housing 10, so as to effectively release the gas pressure inside the housing 10. The electronic explosion-proof valve 50 forms a reliable sealing structure with the housing 10 through a seal, and remains closed by default to ensure the sealing inside the housing 10 and the stability of the internal electrolyte. The electronic explosion-proof valve 50 is electrically connected to the central processing unit 20, and its opening or closing is completely determined by the control signal of the central processing unit 20.

[0042] The central processing unit 20 is fixed on the shell 10, and is connected to the detection member 40 and the electronic explosion-proof valve 50 through signal transmission lines. The central processing unit 20 obtains the key parameters inside the shell 10 in real time through the detection member 40, such as the temperature, stress, local displacement, gas pressure and gas composition of the core 60, and analyzes and judges according to the data fed back by the detection member 40. When it is detected that the internal parameters exceed the preset safety threshold, the central processing unit 20 sends a control signal to the electronic explosion-proof valve 50, instructing it to open to quickly release the pressure or gas in the shell 10, extend the battery life, and avoid the shell 10 rupture or other dangers caused by gas accumulation. When it is detected that the internal parameters meet the preset safety value, the central processing unit 20 sends a control signal to the electronic explosion-proof valve 50, instructing it to close the door to achieve the sealing of the shell 10. It can be imagined that in order to protect the battery pack from foreign matter intrusion, when the electronic explosion-proof valve 50 is closed, the shell 10 is in a positive pressure environment.

[0043] By adopting the above technical solution, the electronic explosion-proof valve 50 is arranged on the housing 10 and controlled by the central processing unit 20, the intelligent management of the gas pressure inside the battery can be realized. When the detection element 40 detects an abnormal signal, the central processing unit 20 can respond quickly and open the electronic explosion-proof valve 50 to promptly remove the internal gas pressure, thereby preventing the housing 10 from bulging or bursting due to excessive internal pressure.

[0044] In one embodiment of the present application, the winding core 60 is further provided with a deformable core box 70 which can absorb or release heat from the winding core 60 .

[0045] Specifically, the deformable core box 70 is located at the center of the core 60 of the battery body, and its function is to regulate the temperature of the lithium-ion battery by absorbing or releasing heat. The material of the deformable core box 70 is a thermosensitive material, such as a phase change material, a thermally conductive plastic, etc., and a phase change material of a "solid-liquid-gas" three-phase change can be built in, so that during the battery charging and discharging process, especially during high-power discharge or charging, the temperature of the battery body can be effectively controlled to avoid safety risks or performance degradation caused by excessive temperature. The deformable core box 70 is in contact with the core 60 in the battery body, and absorbs or releases heat from the core 60 through its built-in heat exchange or heat conduction function.

[0046] The working principle of the deformable core box 70 is: The appropriate working temperature of the winding core 60 is maintained by adjusting the internal temperature of the deformable core box 70. In a high temperature environment, the deformable core box 70 absorbs excess heat through the built-in phase change material to reduce the battery temperature; in a low temperature environment, the deformable core box 70 can introduce external heat into the battery body through the thermal conductive material to prevent the battery from affecting performance due to low temperature. The internal stress of the battery during operation is balanced through the deformation function of the deformable core box. In the fully charged state, the winding core expands and compresses the deformable core box to reduce its volume, reducing the internal stress of the winding core; in the empty state, the winding core shrinks and the deformable core box rebounds to increase its volume; so that the winding core is always within a balanced force range to prevent the battery safety and cycle performance from deteriorating due to changes in the mechanical stress of the battery.

[0047] By adopting the above technical solution, by setting a deformable core box 70 at the center of the winding core 60 of the battery body, it is possible to effectively regulate the heat during the operation of the battery, thereby avoiding the degradation of battery performance or safety hazards caused by excessively high or low temperatures. At the same time, the deformable core box can effectively absorb the expansion requirements of the winding core during charging and discharging by using its own deformation function, and effectively balance the internal stress of the battery during operation. Combined with the heat absorption and release function of the deformable core box 70, it can effectively extend the service life of the battery, prevent aging of the internal materials of the battery or structural damage caused by excessive temperature fluctuations, thereby improving the cycle performance and safety of the battery.

[0048] In one embodiment of the present application, at least one support bar 71 is disposed inside the deformable core box 70 to support the deformable core box 70 so as to improve the support strength of the deformable core box 70 .

[0049] Specifically, the support bar 71 is located inside the deformable core box 70, and its function is to enhance the support strength of the deformable core box 70 to prevent the deformable core box 70 from being deformed or damaged when subjected to high temperature, external force or battery expansion. The support bar 71 can be made of materials such as metal or high-strength plastic to ensure that it can provide sufficient support force during the operation of the battery. The support bar 71 is fixedly connected to the inner wall of the deformable core box 70 to form a stable support structure inside the deformable core box 70. The support bar 71 can be a single support bar 71 or a combination of multiple support bars 71. The arrangement of the support bars 71 can be evenly distributed or concentrated in certain areas as needed to ensure that the deformable core box 70 can maintain a stable shape when subjected to external pressure or temperature changes.

[0050] By adopting the above technical solution, the addition of the support bar 71 improves the support strength of the deformable core box 70, enabling it to withstand more external forces and internal pressures, and prevents the deformable core box 70 from being deformed or damaged under high temperature and high rate discharge conditions, thereby ensuring that the thermal regulation function of the battery can be stably exerted. At the same time, the design of the support bar 71 enhances the durability of the deformable core box 70 during long-term use, prolongs the service life of the battery, and reduces battery failure caused by damage to the deformable core box 70.

[0051] In one embodiment of the present application, the support bar 71 is at least one of a straight line shape, an S shape, and a broken line shape.

[0052] Specifically, the straight support bar 71 is a simple linear structure with a long length and arranged in a straight line. It is evenly distributed on the inner wall of the deformable core box 70 to provide balanced support force. The straight support bar 71 is suitable for the case where the deformable core box 70 has a relatively regular structure and is subjected to relatively uniform force. The straight support bar 71 can be fixed to the inner wall of the deformable core box 70 by integral molding, welding, bonding or embedding, ensuring that the support bar 71 forms a stable connection with the deformable core box 70, so that the support bar 71 can effectively disperse the pressure from the inside and outside, and enhance the mechanical strength of the deformable core box 70. The straight support bar 71 has a simple structure and a low manufacturing cost.

[0053] The S-shaped support bar 71 is a curved structure composed of multiple curved segments, shaped like the letter "S". This shape of the support bar 71 can better adapt to the complex spatial layout inside the battery while providing support force. The S-shaped support bar 71 can form a more complex support network inside the deformable core box 70, enhancing the stability of the deformable core box 70 in multiple directions. The connection method of the S-shaped support bar 71 can be connected to the inner wall of the deformable core box 70 by integral molding, fixings or welding, etc., to ensure that it will not loosen or fall off under thermal expansion and pressure changes. Due to the curved design of the S-shaped support bar 71, it can effectively disperse the forces from all directions, thereby improving the compression and deformation resistance of the deformable core box 70.

[0054] The zigzag support bar 71 is formed by connecting a plurality of straight line segments at an angle. The zigzag support bar 71 not only retains the simplicity of the straight line support bar 71, but also increases the flexibility and adaptability of the support bar 71 through a plurality of folded angles. The zigzag support bar 71 can provide better support force in a limited space, while reducing the risk of damage caused by uneven pressure.

[0055] In one embodiment of the present application, at least one pressure relief port 72 is disposed on the deformable core box 70 .

[0056] Specifically, the pressure relief port 72 is an opening structure provided at the top and / or the bottom of the deformable core box 70 , and is used for the deformable core box 70 to automatically release the pressure when the internal pressure of the battery reaches a certain threshold.

[0057] By adopting the above technical solution, the safety and stability of the deformable core box 70 are improved by providing a pressure relief port 72 at the top or / and bottom of the deformable core box 70. The design of the pressure relief port 72 ensures that when the battery is over-expanded or the internal gas pressure is too high, the deformable core box 70 can release part of the pressure, thereby reducing the risk of thermal runaway of the battery.

[0058] The present application also discloses a method for using an adaptive intelligent lithium-ion battery, comprising the following steps: Connecting the positive electrode column 11 and the negative electrode column 12 of the adaptive intelligent lithium-ion battery to an external circuit; The temperature, stress value and / or local displacement parameter of the winding core 60 in the battery body and / or the internal air pressure and / or the internal gas composition of the shell 10 are monitored in real time by the detection member 40; The central processing unit 20 determines whether the battery operating state is abnormal according to the parameter value detected by the detection element 40; When an abnormal state is detected, the central processing unit 20 controls the switch 30 to disconnect the connection between the positive electrode column 11 and the positive electrode tab 61 of the winding core 60 and / or the connection between the negative electrode column 12 and the negative electrode tab 62 to protect the safety of the battery body; or when an abnormal state is detected, the central processing unit 20 controls the electronic explosion-proof valve 50 to release the internal gas of the battery to balance the internal and external air pressures to extend the battery life and protect the safety of the battery body.

[0059] After the detection parameters return to a normal state, the central processing unit 20 may reclose the switch element 30 and / or close the electronic explosion-proof valve 50 to restore the normal working state of the battery.

[0060] By adopting the above technical solution, the detection member 40 can monitor the temperature, stress value and / or local displacement parameter of the battery core 60 and / or the internal air pressure of the shell 10 and / or the gas composition of the shell 10 in real time, so as to quickly find abnormal conditions and take protective measures to disconnect the current path in time, thereby effectively preventing safety hazards such as thermal runaway and mechanical deformation of the battery; after the parameters return to normal, the normal working state of the battery can be automatically restored, which improves the safety and service life of the battery, while avoiding the complexity caused by human intervention, and has high adaptability and intelligence. The electronic explosion-proof valve 50 discharges negative reaction gas in time, balances the internal and external air pressure of the shell 10, and prolongs the service life and protection safety of the battery.

[0061] It should be understood that by adopting the above technical solution, the switch 30, the detection component 40, the electronic explosion-proof valve 50, the deformable core box 70 and the central processing unit 20 are organically combined to achieve multiple measures to extend the battery life and protect the battery safety, and to achieve multi-level and multi-channel protection. Personnel in the field of professional and technical field should systematically understand the technical solution, and should not completely separate the functions of each module.

[0062] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An adaptive intelligent lithium-ion battery, characterized in that: include: The battery body, with positive and negative poles; A detection member, disposed in the battery body, for detecting the winding core temperature and / or the winding core stress value and / or the winding core local displacement parameter and / or the internal air pressure and / or the internal gas composition of the shell of the battery body; A switch element connected between the positive electrode column and the positive electrode tab of the winding core and / or between the negative electrode column and the negative electrode tab; and The central processing unit is connected to the battery body and can open or close the switch element according to the detection result of the detection element.

2. The adaptive intelligent lithium-ion battery according to claim 1, characterized in that: The battery body comprises: A shell, the positive electrode column and the negative electrode column are arranged on the shell, and the shell is provided with an electrolyte; and The winding core is arranged in the shell.

3. The adaptive intelligent lithium-ion battery according to claim 2, characterized in that: The shell is provided with an electronic explosion-proof valve, and the central processing unit can open or close the electronic explosion-proof valve according to the detection result of the detection element.

4. The adaptive intelligent lithium-ion battery according to any one of claims 1 to 3, characterized in that: The winding core is also provided with a deformable core box which can absorb or release heat from the winding core.

5. The adaptive intelligent lithium-ion battery according to claim 4, characterized in that: The deformable core box is provided with at least one support bar which can support the deformable core box to improve the support strength of the deformable core box.

6. The adaptive intelligent lithium-ion battery according to claim 5, characterized in that: The support bar is in at least one of a straight line shape, an S shape, and a broken line shape.

7. The adaptive intelligent lithium-ion battery according to claim 4, characterized in that: The deformable core box is provided with at least one pressure relief port.

8. A method for using an adaptive intelligent lithium-ion battery, characterized in that: The following steps are involved: Connecting the positive electrode post and the negative electrode post of the adaptive intelligent lithium-ion battery to an external circuit; Real-time monitoring of the temperature, stress value and / or local displacement parameter of the winding core in the battery body and / or the internal air pressure and / or the internal gas composition of the shell by the detection element; The central processing unit determines whether the working state of the battery is abnormal according to the parameter value detected by the detection element; When an abnormal state is detected, the central processing unit controls the switch to disconnect the positive electrode post and the positive electrode tab of the winding core and / or the negative electrode post and the negative electrode tab to protect the safety of the battery body; or when an abnormal state is detected, the central processing unit controls the electronic explosion-proof valve to release the internal gas of the battery and balance the internal and external air pressure to extend the battery life and protect the safety of the battery body. After the detection parameters return to a normal state, the central processing unit may reclose the switch element and / or close the electronic explosion-proof valve to restore the normal working state of the battery.

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