Key Technologies for High Energy Lithium/Thionyl Chloride Batteries
2024-02-23 13:07:19
ã€Technology】New Energy
[Technology Development Unit] China Electronic Information Industry Group Corporation Wuhan Zhongyuan Changjiang Science and Technology Development Co., Ltd.
[Technical Introduction] As a convenient energy source, batteries are widely used in social life and defense. Due to its light weight and high electrochemical equivalents, lithium system research is currently the most active battery research field. Lithium-thionyl chloride batteries have the highest specific energy among lithium primary batteries that have already been industrialized. In recent years, the United States, Germany, France and other countries have strengthened their research on the battery system and expanded the battery application to a wider range of fields. Our factory (752 factory) is the earliest domestic manufacturer of lithium batteries and has realized industrial production. After more than 30 years of technology accumulation, its lithium battery R&D level, product quality, and industrialization rank among the top in China.
The main technical breakthroughs of our high-energy lithium-thionyl chloride battery are:
1) The specific energy of the energy type battery is ≥450 Wh/kg, and the specific energy of the power type battery is ≥300 Wh/kg. This energy density index represents the current advanced level of lithium primary battery technology at home and abroad.
2) The battery has good low temperature performance, and the -40°C low temperature capacity reaches 35% of the normal temperature capacity.
3) The safety and environmental adaptability of the battery satisfies the requirements of the lithium battery country military standard and lithium primary battery related standards.
The realization principle and approach of our high-energy lithium-thionyl chloride battery are:
1) Manufacturing technology of high-performance porous carbon anodes.
2) Application of high-efficiency catalyst containing transition metal macrocyclic complexes.
3) The optimal design of the battery structure and the strict control of the manufacturing process.
[Main Technical Specifications] High-energy lithium-thionyl chloride battery can be designed into energy-type batteries and power-type batteries according to different application requirements. Energy-type batteries generally operate continuously for a long time with a micro-current, and can provide medium-current pulses. Power-type batteries can be designed according to different applications. Generally, they are mainly provided with large batteries or instantaneous high-current pulses, and they can also be continuously operated with micro-currents. Working time. The main technical specifications of high-energy lithium-thionyl chloride battery are as follows:
1. The open circuit voltage of the cell is 3.6V, the working voltage platform is high (typically between 3.3V and 3.6V with the load change), and the open circuit voltage of the battery is n (the number of series) × 3.6V.
2, the use of a wide temperature range (-45 °C ~ +75 °C).
3, the annual self-discharge rate ≤ 2% (energy-type battery storage life of up to 10, power-type battery storage life of up to 5 years).
4. The specific energy of the energy type battery is ≥450 Wh/kg; the specific energy of the power type battery is ≥300 Wh/kg.
5. The safety and environmental adaptability of the battery meet the requirements of the Lithium Battery National Military Standard and Lithium Primary Battery.
[Technical Features] The high-energy lithium/thionyl chloride battery uses metal lithium (Li) as the negative active material, liquid thionyl chloride (SOCl2) as the positive active material, the porous carbon positive electrode as the thionyl chloride reaction carrier, and the inorganic system electrolyte. The main technical features and advantages of this battery are as follows:
1. High specific energy: 3 to 6 times that of conventional alkaline manganese batteries; 1.5 to 2 times that of lithium-manganese dioxide batteries; 2 to 3 times that of lithium-sulphur dioxide batteries.
2. High voltage (3.6 V and stable working voltage above 90%): Alkaline manganese battery voltage is 1.5V; lithium-manganese dioxide battery and lithium-sulphur dioxide battery voltage are both 3V.
3, low-temperature working ability (40 °C low-temperature capacity reaches 35% of the normal temperature capacity): Alkaline manganese batteries work harder than 0 oC; Lithium-manganese dioxide battery is difficult to work below -20 oC.
4, the battery self-discharge rate is low, long storage life (up to 5 to 10 years): Alkaline manganese battery storage life of 2 years.
[Scope of Application] Civilian applications are mainly applicable to communications equipment, monitoring equipment, smart card meters, computer support power supplies, medical equipment, oil drilling, and scientific research equipment.
[patent status] 7 patents are authorized.
[technical status] mass production stage.
ã€cooperation method】
(1) Investment demand. Seek investment to expand production capacity, the production capacity of high-energy lithium-thionyl chloride battery production line reached 10 million/year, and the capital requirement was 50 million yuan. The implementation period was 12 months.
(2) Cooperative research and development. Collaboration with upstream and downstream manufacturers and controlling shareholders of lithium belts, battery acetylene black, lithium battery separators, smart water meters, and electric meters, and joint research on high-energy lithium battery technology and applied systems engineering.
[Expected benefits] The high-energy lithium/thionyl chloride battery is a convenient energy source with high energy, low temperature performance, and long lifespan. It is applicable to many fields such as communication equipment, monitoring equipment, smart card meters, and industry statistics. Among them, only intelligent water and electricity The demand for primary batteries (gas batteries) for gas meters is 100 million. Therefore, it is conservatively predicted that the high-energy lithium-acid chloride battery can generate economic benefits of 1 billion.
[Contact] Wang Yaqin 027-84732092, 13995682579
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