Square steel shell battery and module for assembling battery system

Abstract

The invention discloses a square steel shell battery and module for assembling a battery system. The square steel shell battery and module comprises a battery cell pole group, primary internal connection flow guide sheets, secondary internal connection flow guide sheets, leading-out terminals, a battery shell, battery covers, side supports and grids, wherein the battery cell pole group is arranged in the battery shell; the primary internal connection flow guide sheets are arranged on the two sides of the battery cell pole group; the secondary internal connection flow guide sheets are arranged on the primary internal connection flow guide sheets; center holes are formed in the middles of the secondary internal connection flow guide sheets; the leading-out terminals are welded at the center holes; the battery covers are arranged on the two sides of the battery shell in a covering manner; and the grids are arranged between the side supports. With the adoption of the square steel shell battery and module, the battery uniformity is good; a sealing element is reliable; a material is thin; the energy density is high; a safety valve is difficult to block; the vibration resistance is good; the possibility of a short circuit is low; temperature distribution is uniform; and wide popularization and application can be performed.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of batteries, in particular to the technical field of square steel shell batteries and modules assembled into battery systems. [0003] 【Background technique】 [0004] With the development of green and environmentally friendly new energy businesses, square steel shell batteries with strong alkaline aqueous solutions with various structural designs have appeared. The characteristics are summarized as follows: 1. The design structure of single or module batteries has a top current collector (Hunan Shenzhou, Fujian Weidong, Sichuan Wankaifeng, Shandong Guoli, Anhui Guoxuan, etc.) 2. In order to increase the strength of the battery case or battery cover, the ability to resist deformation and twisting, it is usually realized by increasing the thickness of the material, punching the concave-convex structure, and through the bundled design of the module; 3. For the internal pressure of the battery The way ...

AI Technical Summary

Problems solved by technology

[0005] For these common square steel shell batteries with strong alkaline aqueous solution, the following problems are often encountered in practical applications: 1. The internal active material is prone to uneven reaction during battery activation, resulting in differences in consistency between batteries; 2. Pulse When discharging, the lead-out end is seriously heated due to the large current loaded, causing the seal to fail; 3. The battery is prone to bulging and deformation of the battery shell during charging and discharging. The thickness of the material is: 1.0-1.5mm. Increasing the thickness will have a limited effect on improving the resistance to expansion and deformation, and increasing the wall thickness will increase the total weight of the battery and reduce the energy density; 4. The safety valve is easy to block when it is opened for exhaust and pressure relief , resulting in potential safety hazards; 5. After the plastic parts and metal parts are assembled, the metal parts damage the plastic parts due to vibration, twisting, etc. during use, thus making the function of the plastic parts invalid; The distance is relatively short, and it is easy to cause problems such as external short circuit damage to the battery when the system is integrated; 7. The heat dissipation capacity of the modules in the battery system is limited, and the temperature distribution is uneven

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