Side pole multi-voltage Ni-MH battery module

Abstract

The utility model relates to a side pole multi-voltage nickel-hydrogen battery module, which belongs to the field of battery technology. Including the battery cell (5) fixed in the battery module casing (1), the inner cavity of the battery module casing (1) is vertically provided with a plurality of separators (2), which isolate the inner cavity of the battery module casing (1) It is a plurality of mutually sealed single battery cavities (3), each single battery cavity (3) is respectively packaged with a battery cell (5), and a conductive column (4) is fixed on the separator (2). The cells (5) are connected in series through the conductive posts (4), and the cells (5) located at both ends of the battery module case (1) are respectively connected to the positive post (6) and the negative post ( 7). The invention connects each battery cell in series through the conductive column, so that the battery cell is directly connected inside the shell of the battery module, reduces the weight of the battery module, and has the advantages of high capacity ratio, low cost, safe use, and long service life.

Description

technical field [0001] The utility model relates to a side pole multi-voltage nickel-hydrogen battery module, which belongs to the technical field of batteries, and specifically relates to an internally connected side pole multi-voltage nickel-hydrogen battery module. Background technique [0002] The traditional nickel-metal hydride battery module is composed of a certain number of single batteries connected in series through the connecting plate. Each single battery is a complete battery with a positive pole and a negative pole. Due to the thermal effect of the nickel-hydrogen battery during charging and discharging It is very large, and the sealing requirements for each single battery are very high. A sealing structure needs to be set at the connection between each positive pole and negative pole and the battery module shell. The positive pole, negative pole, nut, and sealing structure cause battery mold The weight of the battery pack is high, the cost is very high, and t...

AI Technical Summary

Problems solved by technology

[0002] The traditional nickel-metal hydride battery module is composed of a certain number of single batteries connected in series through the connecting plate. Each single battery is a complete battery with a positive pole and a negative pole. Due to the thermal effect of the nickel-hydrogen battery during charging and discharging It is very large, and the sealing requirements for each single battery are very high. A sealing structure needs to be set at the connection between each positive pole and negative pole and the battery module shell. The positive pole, negative pole, nut, and sealing structure cause battery mold The weight of the battery pack is high, the cost is very high, and there are many failure points. Any single battery leakage can cause a short circuit and scrap the entire battery module. The connecting plate is located outside the battery, which is prone to short circuit, threatening the entire battery module or even using it. Safety of battery pack equipment

[0003] In the past, the pole pieces of nickel-metal hydride batteries were set with white edges (nickel strips not coated with active materials) on the upper side of the pole pieces, and each pole piece was welded with a tab (also called a current collector), and then passed The tabs are welded to the current collector. The pole pieces of the Ni-MH battery are generally vertically rectangular, resulting in a relatively short welded white edge. After the white edge is connected to the current collector, the battery is prone to heat. Connecting with the current collector, there are many welding process steps, and more importantly, the intermediate carrier of the tab is added. The current passes from the pole piece through the tab and then through the current collector, resulting in an increase in resistance, and the battery is easy to heat up, and the tab Welding with the white edge of the pole piece is often not firm, causing the pole piece to fall off from the tab during the use of the battery, directly causing the battery capacity to drop, affecting the battery life, and breaking the balance between the batteries in the battery module , reduce the service life of the battery module

Images