Development trend of lithium-ion battery safety technology for energy storage

doi:10.19799/j.cnki.2095-4239.2022.0259

Abstract

Abstract:

Lithium-ion battery energy storage is an important aspect of power energy utilization, and safety is the premise that guarantees the application of energy storage technology. To understand the global development trend of technology in this field, this paper summarizes and analyzes the evolution trend of global and Chinese annual patent applications and compares and analyzes the main source countries of patent applicants, as well as the patent applications and patent value of the main applicants based on the search results of the IncoPat patent database. Based on the IPC technology classification, this paper summarizes the technical composition of the main applicant's research and development, the different branches of patented technology through the technical subject distribution, and the development trend of various technical subjects. According to the findings of the study, the number of applications for safety technology patents in the field of lithium-ion battery energy storage is consistent with the global development trend, which has been gradually increasing. Although the number of patents from Chinese applicants is the largest, the value of sharing is high; however, the proportion of patents is relatively small. The patent structure is primarily limited to the country, indicating that there is still a significant gap in key technology control between Chinese and Japanese and US companies. Current safety application technology branches in the field of lithium-ion battery energy storage primarily include battery material improvement, condition monitoring, diagnosis and early warning, thermal management, circuit balance management, and fire and explosion-proof fire-extinguishing technology.

Key words: lithium-ion battery, energy storage, safety technology, patent analysis

CLC Number:

G 353.1

Liping HUO, Weiling LUAN, Zixian ZHUANG. Development trend of lithium-ion battery safety technology for energy storage[J]. Energy Storage Science and Technology, 2022, 11(8): 2671-2680.

Figures/Tables 11

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Table 1

The technology field distribution of the main patent applicants(Top20)"

IPC分类号(小组)	技术领域	专利数量/件
H01M2/16	用于直接转变化学能为电能的方法或装置(例如电池组)的隔板；薄膜；膜片；间隔元件(按材料区分的)	152
H01M10/0525	摇椅式电池，即两个电极均插入或嵌入有锂的电池；锂离子电池	141
H02J7/00	用于电池组的充电或去极化或用于由电池组向负载供电的装置	131
H01M10/48	与测量、试验或指示情况的装置相组合的蓄电池，例如测量、测试或指示电解质高度或密度，用于检测电池或电池组内部状况的导电连接的结构零部件，例如:电压感应端子入	113
H01M10/42	使用或维护二次电池或二次半电池的方法及装置	99
H01M10/052	锂蓄电池	97
H01M10/44	二次电池或二次半电池充电或放电的方法	88
H01M2/10	用于直接转变化学能为电能的方法或装置(例如电池组等)的安装架；悬挂装置；减震器；搬运或输送装置；保持装置	76
G01R31/36	用于测试、测量或监测蓄电池或电池的电气状况的设备，如用于测试容量或充电状态(SOC)的仪器	71
H01M2/14	用于直接转变化学能为电能的方法或装置(例如电池组)的隔板；薄膜；膜片；间隔元件	62
H01M10/04	二次电池的一般结构或制造	55
H01M4/62	由活性材料组成或包括活性材料的电极的活性物质中非活性材料成分的选择，例如胶合剂、填料	53
H01M2/34	具有防止不按要求使用或放电的措施的用于直接转变化学能为电能的方法或装置(例如电池组)	47
H01M2/02	用于直接转变化学能为电能的方法或装置(例如电池组)的电池箱、套或罩	39
H01M10/0567	以添加剂为特征的用作电解质的材料	39
H01M10/058	二次电池的构造或制造	39
H01M4/13	非水电解质蓄电池的电极，例如用于锂蓄电池电极及其制造方法	39
H01M10/613	直接转变化学能为电能的方法或装置(例如电池组)的冷却或保持低温	34
H01M4/36	由活性材料组成或包括活性材料的电极的活性物质、活性体、活性液体的材料的选择	33
H01M4/131	基于混合氧化物或氢氧化物、或氧化物或氢氧化物的混合物的电极，例如LiCoO _x	33

Table 1

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Fig. 9

Table 2

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专利技术主题	中国	日本	美国	韩国	德国	法国
材料改性主题专利总数/件	1820	838	423	178	172	65
材料改性主题专利价值度10的专利数/件	74	300	189	93	54	34
材料改性主题专利价值度9的专利数/件	325	148	88	28	43	10
状态监测主题专利总数/件	1860	393	209	99	66	41
状态监测主题专利价值度10的专利数/件	43	116	105	28	10	20
状态监测主题专利价值度9的专利数/件	297	74	43	26	9	10
平衡管理主题专利总数/件	701	26	75	21	11	5
平衡管理主题专利价值度10的专利数/件	13	6	42	7	2	3
平衡管理主题专利价值度9的专利数/件	118	2	14	7	3	0
防火灭火主题专利总数/件	1079	91	52	38	50	16
防火灭火主题专利价值度10的专利数/件	17	35	18	9	8	4
防火灭火主题专利价值度9的专利数/件	139	21	6	9	10	4

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