Lithium-ion power battery has become an important part of modern military equipment power system due to its high energy density, long service life and environmental protection performance. In order to ensure the stability, safety and reliability of military equipment, China has formulated corresponding military Basic General Specification for lithium ion power battery system-GJB 8898-2013 "General Specification for lithium ion power battery". As an important technical basis for the development and procurement of military equipment, this specification defines the technical requirements and evaluation standards for the design, manufacture, detection and use of lithium-ion power battery systems, it ensures the overall quality and safety performance of military lithium ion power battery system.

I. Positioning and function of GJB 8898-2013 specification

GJB 898-2013 is a key specification in China's national military standard (GJB) system, which is specially formulated for military lithium ion power battery system. This specification covers the basic technical requirements, performance indicators, safety performance, environmental adaptability and reliability test methods of lithium ion power battery system, forming the basic general standard of military lithium ion power battery system.

In the process of military equipment development, lithium-ion power battery system, as the power source, its performance directly affects the combat capability and safety of the equipment. GJB 8898-2013 specification has passed unified technical standards, providing clear design and testing basis for equipment development units and suppliers, effectively ensuring the stable quality, safety and reliability of lithium ion power battery system.

II. Main contents covered by the specification

lithium ion power battery the general specification is comprehensive and covers many key aspects of lithium-ion power battery systems, including:

1. Technical definitions and terms

firstly, the specification defines the relevant terms of lithium ion power battery system uniformly, defines the composition, performance index and relevant test parameters of the battery system, and ensures that all parties have the same language in technical communication and standard implementation, avoid misunderstanding.

2. Technical requirements

the specification puts forward specific requirements for the design performance of lithium ion power battery system, including basic performance indexes such as rated capacity, rated voltage, energy density, charge-discharge efficiency and cycle life. In addition, strict requirements are put forward for the safety performance of the battery system, such as protective measures and performance indicators for abnormal states such as overcharge, overdischarge, short circuit, overtemperature, etc.

3. Structure and material requirements

the structural design and material selection of the battery system are the key to ensure its performance and safety. The specification defines the structural design principles of battery cells, battery packs and management systems, and requires the adoption of materials and processes that conform to military standards to ensure that the battery system has good mechanical strength, corrosion resistance and environmental adaptability.

4. Environmental adaptability

military equipment faces various complex and harsh environmental conditions, and lithium-ion power battery system must have good environmental adaptability. GJB 8898-2013 specifies the performance requirements and test methods of the battery system in high and low temperature, humidity, vibration, shock, salt spray and other environments in detail to ensure that the battery system can work stably in extreme environments.

5. Security performance

safety is one of the most important indicators of lithium ion power battery system. The specification lists strict safety test items and requirements for potential safety hazards of battery systems, including thermal runaway test, short circuit test, mechanical impact test, overcharge and overdischarge protection, etc, ensure that the battery system does not cause dangerous accidents under abnormal working conditions.

6. Reliability requirements

the specification emphasizes the long-term reliability and stability of the battery system, and requires life cycle testing, cycle performance testing and failure rate analysis to ensure that the battery system can maintain excellent performance and safety during the service cycle.

7. Test method and detection

GJB 8898-2013 specifies the test methods of various performance indexes and safety performance in detail, including sample preparation, test conditions, test equipment and data analysis methods to ensure the scientificity and repeatability of test results. At the same time, the specification also puts forward clear requirements on the format and content of the test report to facilitate the archiving of results and subsequent analysis.

III. Application of specifications in military equipment development and procurement

GJB 8898-2013, as the military basic general specification of lithium ion power battery system, plays an important role in the process of equipment development and procurement:

1. Design guidance

the specification provides the technical basis for the design of the battery system, and guides the design unit to reasonably select materials and optimize the structure on the premise of meeting the military performance requirements, so as to ensure that the performance and safety of the battery system meet the military standards.

2. Quality control

through clear performance indexes and test standards, specifications provide quality control basis for production and manufacturing links. Manufacturing enterprises carry out process inspection and final inspection of products according to specifications to ensure that the ex-factory products meet military requirements.

when the military purchases lithium-ion power battery system, GJB 898-2013 is taken as the acceptance standard to test the performance and safety of the supplier's products to ensure the reliability and safety of the purchased products, avoid unqualified products flowing into military equipment system.

4. Technical Communication

as a unified technical standard, the specification promotes technical exchanges and cooperation among military enterprises, research institutions and suppliers, and promotes the standardized application of lithium-ion power battery technology in the military field.

IV. Technical characteristics and rigor of specifications

GJB 8898-2013 focuses on the rigor and scientificity of technology. The specification combines the practical application characteristics of lithium-ion power batteries and the special requirements of military equipment, and formulates a detailed and comprehensive index system and testing method. The test content covers the performance, environmental adaptability, safety and reliability of the battery system, ensuring that the battery system can operate stably in complex and harsh military environment.

At the same time, the specification also emphasizes the representativeness of samples and the standardization of test conditions to ensure the accuracy and comparability of test results. This rigorous technical standard system provides a solid foundation for the quality assurance of military lithium ion power battery system.