For a long time, the safety of new energy vehicles has been the focus of public attention. The essence of the battery safety problem is the 배터리 생산 itself. The manufacture of high-quality batteries and improve the 리튬 배터리 기술 will reduce the occurrence of battery safety accidents.
목차
Characteristics of battery production
What is the nature of the 리튬 이온 배터리 안전 problem? Is there any way to make a high quality battery? Compared with other general products, battery production presents the following characteristics:
● Mix materials of different sizes evenly
The size of lithium battery materials ranges from nanometers to micrometers to millimeters, and the span is very large. How to ensure that the materials with such a large span are mixed together to ensure uniform mixing, no stratification, and no falling off is the key to ensuring battery consistency.
● Soft materials, hard positioning accuracy requirements
그리고 리튬 배터리 분리기, cathode and anode are all soft thin film materials ranging from tens of microns to hundreds of microns. During the battery production, these materials need to be aligned and stable, able to resist a certain impact during use, and the particle size expansion/shrinkage changes should not affect the stability of the original structure, without cracking or falling off. How these soft materials meet the requirements of dimensional stability and consistent positioning during the battery production process is the key to ensuring the quality of the battery.
● Factors that are not paid attention to have a great impact on quality
The temperature uniformity, humidity, and the amount and distribution of on-site dust in the battery production process, the size and density of processing burrs, and the length of time the pole piece stays in different environments will all affect the degree of water absorption of the material. And then affect the quality of battery production. Therefore, battery production should formulate standards to monitor and control these factors.
● The battery industry continues to upgrade
With the increasing application of batteries and increasing demand, the materials, structures, battery production processes, manufacturing methods and manufacturing equipment of batteries are also constantly being upgraded and updated. These upgrades will inevitably bring uncertainty to the battery production process, and these factors need to be fully considered in the planning and design of manufacturing.
● The battery production process is gradually moving from continuous to discrete
Battery production is the manufacturing process from powder slurrying, coating, rolling and die-cutting, to winding or stacking, assembly, liquid injection, chemical formation and PACK. In the battery production process, the material gradually changes from continuous slurry, foil, coating, rolling into film, to slitting, die-cutting, separation and gradient slitting. This is a continuous process, followed by winding or lamination, and gradually evolves completely into discrete monomers.
In battery production process, the linear, nonlinear, and random dynamic processes of the system are mixed with each other, making the bidirectional traceability of battery production process data, the association between battery materials and cells, and the establishment and optimization of models very complicated.
● The scientific laws of cause and effect are not clear
Battery production is a complex, multidisciplinary, and multidisciplinary science. Due to the complex and diverse theories, mechanisms and data involved, it is difficult to summarize the scientific laws with clear causal relationships. At present, there is still a lack of quantitative and effective system scientific analysis methods and system performance characteristic evaluation methods to meet the reconfigurable, large-scale, and customized requirements of batteries as general-purpose product manufacturing.
Metrics to measure battery production level
The level of battery production directly affects the use value of the battery. In order to meet the needs of the new energy vehicle and energy storage application markets, high-quality battery production and supply are particularly important. So, how should the battery production level of be measured? Battery production follows the basic laws of large-scale manufacturing, which can be measured by the following indicators.
● Battery production qualification rate
The qualified rate of battery production refers to the ratio of the number of batteries that meet the characteristics of use to the total number of batteries initially put into use. Use characteristics refer to the basic characteristics that meet the requirements of battery use. Generally speaking, it refers to the combination of basic performance and conditions that are satisfied at the same time, such as capacity, internal resistance, rate, size, self-discharge and safety.
In different stages of battery production and different application scenarios after the battery is finished, the definitions of usage characteristics are also different. The subdivided battery production qualification rate includes: battery production qualification rate, module manufacturing qualification rate, PACK manufacturing qualification rate and battery pairing qualification rate. For battery cell manufacturers, the emphasis should be placed on the pass rate of cell pairing, that is, the number of cells that meet the requirements of pairing divided by the number of cells that are invested in manufacturing.
● Material utilization
The material utilization rate is the ratio of the material value of the actual output formed battery to the value of all the consumed materials put into the same amount of battery. All materials here include the finished constituent materials present in the formed battery and auxiliary materials consumed in proportion to the output during the battery production process.
At present, the average level of this indicator in the industry is 90% to 94%, and there is a lot of room for improvement. Comprehensively improving the utilization rate of materials from the aspects of battery design, battery production process, manufacturing equipment and manufacturing management can realize resource conservation and bring greater benefits to battery manufacturers.
● Battery production safety
The safety of manufacturing battery products generally uses the ratio of the number of batteries that have thermal runaway or safety indicators exceeding the standard within a certain continuous production cycle to the total number of batteries produced during the period multiplied by one million, which is called the PPM number. Generally, the safety index of battery production should be less than several PPM, which is called PPM level control. The battery pack production safety index should be less than several PPB, which is called PPB-level control.
● Battery yield rate
Subdividing the battery production qualification rate, there is also an indicator of the battery yield rate. The battery yield rate is the percentage of the ratio of the number of qualified battery cells actually loaded into the battery pack to the number of battery cells at the time of feeding during the battery production process from 배터리 재료 to finished battery packs.
The determination of these key indicators, such as battery production pass rate, material utilization rate, manufacturing safety, and battery yield, changes the judgment of battery production level from qualitative to quantitative. With the development of intelligent manufacturing, the importance of indicators will become increasingly prominent, and become an objective basis for measuring and improving battery quality and battery production level.
결론
As a general-purpose product, the battery has different material scales, the battery production process ranges from continuous to discrete, the semi-finished product presents a variety of states, the dynamic process is mixed with each other, and there are multiple physical fields. And environmental factors will add more instability. The theory, mechanism and manufacturing process are complex.
Only by defining the basic metadata and data dictionaries of incoming materials, equipment, and processes, can the data be accurately obtained according to the laws, organize the data well, build a data platform, and establish a model that reflects the real laws. Then according to the battery production target requirements, continuous optimization can achieve the battery production target.
안녕하세요, 독자 여러분, 저는 글쓰기에 대한 열정과 배터리 스와핑 업계에 대한 풍부한 경험을 가진 작가라고 자신 있게 소개합니다. 저는 전자공학 학사 학위를 받았으며, 이전에 유명 파워 배터리 회사에서 배터리 엔지니어로 근무하면서 설계부터 운영 구현까지 다양한 오토바이 스와핑 스테이션 프로젝트에 적극적으로 참여하고 주도했습니다.
수년 동안 저는 스와핑 기술, 비즈니스 모델 및 시장 동향을 적극적으로 탐구하고 광범위하게 연구했습니다. 실무 경험을 통해 스테이션 계획, 장비 선정 및 운영 관리의 다양한 측면에 적극적으로 기여하면서 귀중한 통찰력을 축적해 왔습니다.
배터리 스와핑 분야에서 저의 통찰력과 경험을 공유할 수 있기를 간절히 기대하고 있습니다. 저의 글이 빠르게 진화하는 이 산업을 더 잘 이해하고 의사결정에 귀중한 통찰력을 제공하는 데 도움이 될 것이라 믿습니다. 배터리 스와핑의 세계를 함께 탐험하는 흥미진진한 여정을 시작합시다!
배터리 생산 특성 및 제조 수준 표시기
Characteristics of battery production
What is the nature of the 리튬 이온 배터리 안전 problem? Is there any way to make a high quality battery? Compared with other general products, battery production presents the following characteristics:
● Mix materials of different sizes evenly
The size of lithium battery materials ranges from nanometers to micrometers to millimeters, and the span is very large. How to ensure that the materials with such a large span are mixed together to ensure uniform mixing, no stratification, and no falling off is the key to ensuring battery consistency.
● Soft materials, hard positioning accuracy requirements
그리고 리튬 배터리 분리기, cathode and anode are all soft thin film materials ranging from tens of microns to hundreds of microns. During the battery production, these materials need to be aligned and stable, able to resist a certain impact during use, and the particle size expansion/shrinkage changes should not affect the stability of the original structure, without cracking or falling off. How these soft materials meet the requirements of dimensional stability and consistent positioning during the battery production process is the key to ensuring the quality of the battery.
● Factors that are not paid attention to have a great impact on quality
The temperature uniformity, humidity, and the amount and distribution of on-site dust in the battery production process, the size and density of processing burrs, and the length of time the pole piece stays in different environments will all affect the degree of water absorption of the material. And then affect the quality of battery production. Therefore, battery production should formulate standards to monitor and control these factors.
● The battery industry continues to upgrade
With the increasing application of batteries and increasing demand, the materials, structures, battery production processes, manufacturing methods and manufacturing equipment of batteries are also constantly being upgraded and updated. These upgrades will inevitably bring uncertainty to the battery production process, and these factors need to be fully considered in the planning and design of manufacturing.
● The battery production process is gradually moving from continuous to discrete
Battery production is the manufacturing process from powder slurrying, coating, rolling and die-cutting, to winding or stacking, assembly, liquid injection, chemical formation and PACK. In the battery production process, the material gradually changes from continuous slurry, foil, coating, rolling into film, to slitting, die-cutting, separation and gradient slitting. This is a continuous process, followed by winding or lamination, and gradually evolves completely into discrete monomers.
In battery production process, the linear, nonlinear, and random dynamic processes of the system are mixed with each other, making the bidirectional traceability of battery production process data, the association between battery materials and cells, and the establishment and optimization of models very complicated.
● The scientific laws of cause and effect are not clear
Battery production is a complex, multidisciplinary, and multidisciplinary science. Due to the complex and diverse theories, mechanisms and data involved, it is difficult to summarize the scientific laws with clear causal relationships. At present, there is still a lack of quantitative and effective system scientific analysis methods and system performance characteristic evaluation methods to meet the reconfigurable, large-scale, and customized requirements of batteries as general-purpose product manufacturing.
Metrics to measure battery production level
The level of battery production directly affects the use value of the battery. In order to meet the needs of the new energy vehicle and energy storage application markets, high-quality battery production and supply are particularly important. So, how should the battery production level of be measured? Battery production follows the basic laws of large-scale manufacturing, which can be measured by the following indicators.
● Battery production qualification rate
The qualified rate of battery production refers to the ratio of the number of batteries that meet the characteristics of use to the total number of batteries initially put into use. Use characteristics refer to the basic characteristics that meet the requirements of battery use. Generally speaking, it refers to the combination of basic performance and conditions that are satisfied at the same time, such as capacity, internal resistance, rate, size, self-discharge and safety.
In different stages of battery production and different application scenarios after the battery is finished, the definitions of usage characteristics are also different. The subdivided battery production qualification rate includes: battery production qualification rate, module manufacturing qualification rate, PACK manufacturing qualification rate and battery pairing qualification rate. For battery cell manufacturers, the emphasis should be placed on the pass rate of cell pairing, that is, the number of cells that meet the requirements of pairing divided by the number of cells that are invested in manufacturing.
● Material utilization
The material utilization rate is the ratio of the material value of the actual output formed battery to the value of all the consumed materials put into the same amount of battery. All materials here include the finished constituent materials present in the formed battery and auxiliary materials consumed in proportion to the output during the battery production process.
At present, the average level of this indicator in the industry is 90% to 94%, and there is a lot of room for improvement. Comprehensively improving the utilization rate of materials from the aspects of battery design, battery production process, manufacturing equipment and manufacturing management can realize resource conservation and bring greater benefits to battery manufacturers.
● Battery production safety
The safety of manufacturing battery products generally uses the ratio of the number of batteries that have thermal runaway or safety indicators exceeding the standard within a certain continuous production cycle to the total number of batteries produced during the period multiplied by one million, which is called the PPM number. Generally, the safety index of battery production should be less than several PPM, which is called PPM level control. The battery pack production safety index should be less than several PPB, which is called PPB-level control.
● Battery yield rate
Subdividing the battery production qualification rate, there is also an indicator of the battery yield rate. The battery yield rate is the percentage of the ratio of the number of qualified battery cells actually loaded into the battery pack to the number of battery cells at the time of feeding during the battery production process from 배터리 재료 to finished battery packs.
The determination of these key indicators, such as battery production pass rate, material utilization rate, manufacturing safety, and battery yield, changes the judgment of battery production level from qualitative to quantitative. With the development of intelligent manufacturing, the importance of indicators will become increasingly prominent, and become an objective basis for measuring and improving battery quality and battery production level.
결론
As a general-purpose product, the battery has different material scales, the battery production process ranges from continuous to discrete, the semi-finished product presents a variety of states, the dynamic process is mixed with each other, and there are multiple physical fields. And environmental factors will add more instability. The theory, mechanism and manufacturing process are complex.
Only by defining the basic metadata and data dictionaries of incoming materials, equipment, and processes, can the data be accurately obtained according to the laws, organize the data well, build a data platform, and establish a model that reflects the real laws. Then according to the battery production target requirements, continuous optimization can achieve the battery production target.
For articles related to battery manufacturers, you can also check out top 10 power battery manufacturers in the world.