A method and system for optimizing the full life cycle of a military energy storage battery

Abstract

This invention discloses a closed-loop optimization method and system for the entire life cycle of military energy storage batteries, belonging to the field of military new energy storage technology. This system constructs a closed-loop system covering the entire life cycle, from material gene optimization to structural safety design, intelligent BMS management and control, health status prediction, and tiered utilization and recycling. It fundamentally suppresses lithium plating and dendrite growth in batteries, achieving a 1C charge-discharge cycle life of ≥4000 cycles for military power batteries, a cycle life of ≥12000 cycles for energy storage batteries, an energy density of ≥300Wh / kg, and significantly improved adaptability to extreme environments. This invention solves the core problems of short lifespan, insufficient adaptability to extreme environments, and poor safety in military special energy storage batteries. The entire process is 100% domestically developed and controllable, and can be widely applied to scenarios such as power batteries for new energy armored vehicles of the army, portable energy storage equipment for individual soldiers, and field combat energy storage power stations.

Description

Technical Field

[0001] This invention belongs to the field of military new energy storage technology, specifically involving a method and system for closed-loop optimization of the entire life cycle of military energy storage batteries. Background Technology

[0002] New energy storage is a core support for the Army's unmanned and electric equipment. Existing energy storage battery technology has the following core defects: 1. Although civilian power batteries have achieved mass production, they cannot meet the extreme environmental requirements of military scenarios, such as -40℃ to 60℃. They also have insufficient shock and vibration resistance, short cycle life, and cannot meet the long-cycle and high-reliability service requirements of military equipment. 2. Existing battery technology cannot fundamentally suppress lithium plating and dendrite growth, resulting in short battery cycle life, thermal runaway safety risks, and failure to meet the high safety requirements of military energy storage equipment; 3. There is no complete life cycle management system, resulting in large errors in predicting battery health status, low utilization rate of retired battery resources, and high life cycle costs; 4. High-end military energy storage battery technology is monopolized by foreign countries, posing a risk of supply chain disruption and making it impossible to guarantee the independent control and security of the army's new energy equipment. Summary of the Invention

[0003] Purpose of the invention To address the aforementioned shortcomings of existing technologies, the present invention aims to provide a closed-loop optimization method and system for the entire life cycle of military energy storage batteries. This system constructs a complete closed-loop system from material optimization and structural integration to intelligent management and tiered recycling, significantly improving the cycle life, energy density, extreme environment adaptability, and safety of military energy storage batteries. The entire process is 100% domestically produced and controllable, ensuring the core needs of the Army's new energy equipment. Technical solution To achieve the above-mentioned objectives, the technical solution of this invention is: a closed-loop optimization system for the entire life cycle of a military energy storage battery, characterized in that it includes an electrode material optimization module, a battery structure integration module, an adaptive BMS control module, a precise SOH prediction module, and a closed-loop optimization module for the entire life cycle; The electrode material optimization module is used to perform targeted optimization of the battery's positive electrode, negative electrode, and electrolyte materials to improve the battery's energy density, cycle life, and adaptability to extreme environments. The battery structure integration module is used to improve battery assembly efficiency and structural safety through CTP / CTC integration technology and laser welding process; The adaptive BMS control module is used to suppress lithium plating and dendrite growth in the battery from the source through an adaptive charge and discharge algorithm, so as to achieve precise charge and discharge control in the entire temperature range with a battery temperature difference of ≤±2℃. The SOH (State of Health) accurate prediction module is used to accurately predict the battery's health status and remaining lifespan based on the battery's full life cycle operation data, with a prediction error of ≤2%. The full life cycle closed-loop optimization module is used to realize closed-loop management of the entire process of battery production, service, secondary use and material recycling, thereby improving resource utilization. As a preferred embodiment, the battery system optimized by the electrode material optimization module includes at least one of the following: ternary single-crystal cathode, lithium manganese iron phosphate cathode, silicon-carbon anode, and composite solid electrolyte. The battery energy density is ≥300Wh / kg, and the discharge capacity retention rate is ≥85% at -40℃. As a preferred option, the battery structure integration module has a battery pack efficiency of ≥85%, and is equipped with an impact-resistant, vibration-resistant, waterproof and explosion-proof structural design, which meets the requirements for use in extreme environments of military equipment. As a preferred embodiment, the adaptive BMS control module can achieve a cycle life of ≥4000 cycles for power batteries and ≥12000 cycles for energy storage batteries under 1C charge / discharge conditions, with a capacity retention rate of ≥80% and a thermal runaway risk reduced by more than 90%. As a preferred solution, the full life cycle closed-loop optimization module can achieve a sorting accuracy of ≥95% for the cascade utilization of retired batteries, a closed-loop recycling rate of ≥90% for battery materials, and increase the resource utilization rate from the industry standard of 40% to over 80%. As a preferred embodiment, the system is a power battery for new energy armored vehicles / unmanned combat vehicles of the army, portable energy storage equipment for individual soldiers, field combat energy storage power station, long-endurance energy storage system for military unmanned equipment, and control system for emergency communication support energy storage equipment. As a preferred embodiment, the system described in any one of claims 1-6 comprises the following steps: S1 Electrode Material Optimization: Targeted optimization of battery positive and negative electrode materials and electrolyte to improve battery energy density, cycle life and adaptability to extreme environments; S2 Battery Structure Integration: Battery pack integration is completed through CTP / CTC integration technology and laser welding process, improving assembly efficiency and structural safety; S3 Adaptive Charge and Discharge Management: Through the adaptive BMS system, precise charge and discharge management is achieved across the entire temperature range, suppressing lithium plating and dendrite growth at the source, and improving battery cycle life and safety; S4 Accurate Health Status Prediction: Based on battery operation data, accurately predicts the battery's SOH health status and remaining service life, with a prediction error of ≤2%; S5 Full Life Cycle Closed-Loop Management: Achieves closed-loop optimization of the entire battery process from production, service, secondary use to material recycling, thereby improving resource utilization. As a preferred option, in step S3, the adaptive BMS system can adapt to the extreme military service environment of -40℃ to 60℃, and the temperature difference inside the battery pack during charging and discharging is ≤ ±2℃. As a preferred approach, we should first complete the implementation and verification by optimizing the electrolyte additives for liquid batteries and upgrading the BMS system, and then gradually promote the implementation of semi-solid and all-solid battery technologies. As a preferred solution, the entire process uses domestically produced materials, production lines, and processes, making it 100% independently controllable and directly compatible with existing domestic battery mass production lines for rapid mass production. Beneficial effects 1. Significantly improves the performance of military energy storage batteries, with a 1C charge-discharge cycle life of ≥4000 times for power batteries, a cycle life of ≥12000 times for energy storage batteries, an energy density of ≥300Wh / kg, and a low-temperature discharge capacity retention rate of ≥85% at -40℃, perfectly meeting the service requirements of extreme military environments. 2. By suppressing lithium plating and dendrite growth in batteries at the source, the risk of thermal runaway is reduced by more than 90%, significantly improving the safety and reliability of military energy storage equipment; 3. Battery health status prediction error ≤2%, utilization rate of retired battery resources increased from the industry standard of 40% to over 80%, and the cost per kilowatt-hour of the entire life cycle decreased by over 40%, significantly reducing the life cycle support cost of military energy storage equipment; 4. The entire process of materials, production lines, and technology is 100% domestically produced and controllable. It can be directly adapted to existing domestic battery mass production lines for rapid mass production without the need to build new production lines or rely on imports. This completely breaks the foreign technology monopoly and ensures the supply chain security of the Army's new energy equipment. 5. It can be widely adapted to the military energy storage needs of the Army in all scenarios, such as new energy armored vehicles, unmanned combat vehicles, individual soldier energy storage equipment, field combat energy storage power stations, and emergency communication support equipment, and helps the Army upgrade its equipment to be electrified and unmanned. Detailed Implementation Example 1 This embodiment focuses on the 280Ah lithium iron phosphate energy storage battery used in Army field combat energy storage power stations, and conducts closed-loop optimization throughout its entire life cycle. The specific steps are as follows: 1. Electrode material optimization: Nano-coating and doping optimization of lithium iron phosphate cathode material, interface modification of graphite anode, optimization of electrolyte formulation, addition of functional additives to improve battery cycle life and high and low temperature performance. 2. Battery structure integration: The battery pack is integrated using CTP integration technology and laser welding, achieving a pack efficiency of 86%. It is equipped with an impact-resistant, waterproof and explosion-proof structural design, meeting the requirements for military field service. 3. Adaptive charge and discharge management: Deploy an adaptive BMS management system and adopt an adaptive charge and discharge algorithm to suppress lithium plating and dendrite growth in the battery from the source. During the charge and discharge process, the temperature difference inside the battery pack is controlled within ±2℃, achieving precise management across the entire temperature range. 4. Accurate prediction of battery health status: Construct a battery SOH prediction model, based on battery life cycle operation data, to accurately predict battery health status and remaining service life, with a prediction error of ≤1.8%. 5. Closed-loop management throughout the entire life cycle: Construct a closed-loop system for the entire process of batteries, from production, service, secondary use to material recycling, with a sorting accuracy rate of ≥96% for secondary use of retired batteries and a material closed-loop recycling rate of ≥92%. Performance test results The energy storage battery prepared in this embodiment has a cycle life of 12,800 cycles under 1C charge-discharge conditions, a capacity retention rate of 81.2%, a low-temperature discharge capacity retention rate of 86.5% at -40℃, no degradation in high-temperature cycle stability at 60℃, and a 92% reduction in the risk of thermal runaway. It fully meets the service requirements of military field energy storage power stations and can be directly adapted to the large-scale mass production of existing domestic battery production lines.

Claims

1. A closed-loop optimization system for the entire life cycle of a military energy storage battery, characterized in that, It includes an electrode material optimization module, a battery structure integration module, an adaptive BMS control module, a precise SOH prediction module, and a full life cycle closed-loop optimization module; The electrode material optimization module is used to perform targeted optimization of the battery's positive electrode, negative electrode, and electrolyte materials to improve the battery's energy density, cycle life, and adaptability to extreme environments. The battery structure integration module is used to improve battery assembly efficiency and structural safety through CTP / CTC integration technology and laser welding process; The adaptive BMS control module is used to suppress lithium plating and dendrite growth in the battery from the source through an adaptive charge and discharge algorithm, so as to achieve precise charge and discharge control in the entire temperature range with a battery temperature difference of ≤±2℃. The SOH (State of Health) accurate prediction module is used to accurately predict the battery's health status and remaining lifespan based on the battery's full life cycle operation data, with a prediction error of ≤2%. The full life cycle closed-loop optimization module is used to realize closed-loop management of the entire process of battery production, service, secondary use and material recycling, thereby improving resource utilization.

2. The system according to claim 1, characterized in that, The battery system optimized by the electrode material optimization module includes at least one of ternary single crystal cathode, lithium manganese iron phosphate cathode, silicon carbon anode, and composite solid electrolyte, with a battery energy density ≥300Wh / kg and a discharge capacity retention rate ≥85% at a low temperature of -40℃.

3. The system according to claim 1, characterized in that, The battery structure integration module has a battery pack efficiency of ≥85%, and is equipped with an impact-resistant, vibration-resistant, waterproof and explosion-proof structural design, which meets the requirements for use in extreme environments of military equipment.

4. The system according to claim 1, characterized in that, The adaptive BMS control module can achieve a cycle life of ≥4000 cycles for power batteries and ≥12000 cycles for energy storage batteries under 1C charge / discharge conditions, with a capacity retention rate of ≥80% and a thermal runaway risk reduced by more than 90%.

5. The system according to claim 1, characterized in that, The full life cycle closed-loop optimization module can achieve a sorting accuracy of ≥95% for the cascade utilization of retired batteries, a closed-loop recycling rate of ≥90% for battery materials, and increase resource utilization from the industry standard of 40% to over 80%.

6. The system according to claim 1, characterized in that, The system is a control system for power batteries for new energy armored vehicles / unmanned combat vehicles of the army, portable energy storage equipment for individual soldiers, field combat energy storage power stations, long-endurance energy storage systems for military unmanned equipment, and energy storage equipment for emergency communication support.

7. A closed-loop optimization method for the entire life cycle of military energy storage batteries, characterized in that, The system applied to any one of claims 1-6 includes the following steps: S1 Electrode Material Optimization: Targeted optimization of battery positive and negative electrode materials and electrolyte to improve battery energy density, cycle life and adaptability to extreme environments; S2 Battery Structure Integration: Battery pack integration is completed through CTP / CTC integration technology and laser welding process, improving assembly efficiency and structural safety; S3 Adaptive Charge and Discharge Management: Through the adaptive BMS system, precise charge and discharge management is achieved across the entire temperature range, suppressing lithium plating and dendrite growth at the source, and improving battery cycle life and safety; S4 Accurate Health Status Prediction: Based on battery operation data, accurately predicts the battery's SOH health status and remaining service life, with a prediction error of ≤2%; S5 Full Life Cycle Closed-Loop Management: Achieves closed-loop optimization of the entire battery process from production, service, secondary use to material recycling, thereby improving resource utilization.

8. The method according to claim 7, characterized in that, In step S3, the adaptive BMS system can adapt to the extreme military service environment of -40℃ to 60℃, and the temperature difference inside the battery pack during charging and discharging is ≤ ±2℃.

9. The method according to claim 7, characterized in that, First, we will complete the implementation and verification by optimizing the electrolyte additives for liquid batteries and upgrading the BMS system, and then gradually promote the implementation of semi-solid and all-solid battery technologies.

10. The method according to claim 7, characterized in that, The entire process uses domestically produced materials, production lines, and processes, making it 100% independently controllable and directly adaptable to existing domestic battery mass production lines for rapid mass production.