Lithium battery manufacturers talk about power lithium battery module design requirements and connection methods

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Leverancier van draagbare energiecentrales

Lithium-ion battery manufacturers talk about power lithium ion battery module design requirements and connection methods. The dynamic lithium-ion battery module system design should be presumed to meet the power requirements and other designs of the whole vehicle, while considering the internal structure and safety and management design of the battery system itself. Some of the overall and versatility principles should be considered when designing, including good security, high ratio energy, high ratio power, temperature adaptability, long service life, etc.

Lithium-ion battery manufacturers talk about the design requirements of the dynamic lithium-ion battery module? The lithium-ion battery module can be understood as a combination of lithium ion batter to combine the string, and install a monomer battery monitoring and the intermediate product of the battery formed after the management device. Its structure must support, fix, and protect the battery. ◆ Structural design requirements are reliable: anti-gasification; process controllable: no soldering, duly welding, ensuring 100% of the battery, low cost: Pack production line automation cost, including production equipment, production loss; Repair: Lithium-ion battery pack is easy to maintain, repair, low cost, and the battery can be easy to use; to prevent the heat transfer isolation, prevent the heat loss of control too fast, or put this step to the Pack design and then consider.

◆ Thermal Design With the pursuit of high-performance electric vehicles, forcing the soft bag battery to have an active thermal management structure. The power lithium-ion battery module is stacked by the electrical core, and there is a liquid cooler arranged between the battery cells, which guarantees that each of the cells have a large surface contact to liquid cooling board. 当然软包要成熟，做液冷技术并不容易，要考虑固定、密封、绝缘等问题。

液体冷板。 ◆ Electrical design electrical design, contains two parts: low pressure and high pressure. 低压设计，一般考虑几种功能。

通过信号线束，将电池电压、温度信息从控制板或者安装在模块上的所谓的模块控制器采集到模块中；模块控制器一般设计有均衡功能（主动均衡或者被动均衡或者二者兼有系数）；少量的继电器通​​断控制功能可以设计在从控制器上，也可以设计在模块控制器上；通过CAN通讯连接模块控制器和主控制器，实现模块信息与电池电压、温度信息的连接。 High pressure design, important is the string parallel joint between the battery and the cell, and the external connection between the module, designing the connection conductivity between the lithium-ion battery module and the module, and the general module is only considered in series. ◆ Safety design safety design can be divided into three retrogress requirements: good design, do not have accidents; if it doesn't work, it is best to war well in advance, give people a reflection time; failure has occurred, designed The goal becomes turned to prevent accidents from spreading too fast.

◆ Lightweight design light quantization design, the most important purpose is to pursue battery life, eliminate all the burden, lightly. 如果再轻点的话，那就更乐意跟着成本走啦。 Lightweight roads, such as improved battery energy density.

Dynamic lithium-ion battery module The common lithium-ion battery module type, according to the connection of the electrical cell and the conductive bus bar, can be divided into three forms of welding, snail. Welding is applied to the welding process of lithium ion battery modules, important laser welding, ultrasonic welding and resistance welding. Among them, laser welding and industrial robots are gradually become the main force of automated module production lines.

Welding process, high efficiency, easy to achieve automation production. Screw, use the connection between the electrical cell and the busbar with the anti-locked screw. This form is simple in the process, but it is important to apply the battery system that is relatively large.

Especially the square battery screw structure is more. The benefit of mechanical crimping is that the disassembly is flexible, post-maintenance and secondary recycling success rate is high. The disadvantage is that the assembly efficiency is difficult to increase significantly.

If the mechanical connection structure is designed to be insufficient enough, the possibility of contact resistance changes in long-term road vehicle operating environments. Summary: The same pillar type battery, in a group of lithium-ion batteries, the connection process will also have a great difference, and there is a respective advantages and disadvantages. Regarding the current dynamic lithium battery industry, the degree of automation of the module is relatively high, and the advantages of application robots and special equipment are obvious due to complexity of their processes, the requirements of work environment, etc.