Preparation method of nickel-hydrogen battery
A technology for nickel-metal hydride batteries and battery cells, which is applied in the field of preparation of nickel-hydrogen batteries, and can solve problems such as grid breakage of the baseband of the pole piece, low strength of the end face of the battery cell, short-circuiting of burrs, etc., so as to reduce burrs, facilitate welding, increase intensity effect
Active Publication Date: 2013-11-06
先进储能材料国家工程研究中心有限责任公司
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Problems solved by technology
[0005] The present invention aims to solve the problems in the prior art that the strength of the end face of the battery core is relatively low, resulting in weak welding, and even the breakage of the baseband network position of the pole piece, and the risk of burrs and short circuits in the process of pressing down the end surface of the pole piece after winding, etc. The problem is to provide a new chemical battery manufacturing method, which overcomes the defects in the prior art and avoids the risk of burrs and short circuits in the process of pressing down in the traditional process; improves the strength of the end face of the battery cell and facilitates welding; and The amount of passing current increases after welding
Method used
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Embodiment 1
[0023] Such as figure 1 In the positive electrode piece 6 shown, a nickel wire 1 with a diameter of 0.3mm is welded on the edge of the baseband of the pole piece 6, and the other parts of the baseband are the upper powder position 2. A part of the cross section of the nickel wire 1 exceeds the edge of the baseband, and the welding method is laser Welding, using a laser welding equipment available on the market, the optical settings are as follows:
[0024] laser
[0025] The process parameters are as follows:
[0026] Power (W)
[0027] The positive electrode sheet 6, the diaphragm 5, and the negative electrode sheet 4 are wound into battery cells, and put into the casing 3. The structure is as follows: figure 2 , image 3 As shown, the current collector is then welded on the nickel wire 1, and then the cell is connected to the shell 3 or the cap through the lug, and then the electrolyte is injected and sealed.
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Abstract
The invention discloses a preparation method of a nickel-hydrogen battery. The preparation method comprises the following steps of: preparing a pole piece; coiling the pole piece to prepare a battery electric core; welding a polar lug on the electric core; welding a current collecting piece with a cap; injecting electrolyte; sealing an opening; in the process of preparing the polar piece, welding a metal wire on the edge of a baseband along a positive pole piece; and after coiling the pole piece to prepare the battery electric core and coiling the pole piece, welding the current collecting piece on the metal wire on a positive end face. By adopting the preparation method of the invention, the strength of a welding part of pole piece net position is increased, burrs are reduced, the risk of burr short circuit in the press-down process of the conventional technology; and the preparation method increases the welding area and the passing current magnitude, and is favorable for high-current charge and discharge of the battery.
Description
technical field [0001] The invention relates to a preparation method of a nickel-hydrogen battery. Background technique [0002] As a new type of high-performance green battery, nickel-metal hydride batteries have higher capacity than nickel-cadmium batteries. They have the characteristics of new materials, high specific energy, no cadmium, lead and heavy metal pollution, and no memory effect. They have great market capacity and broad market potential. industrialization prospects. Since the nickel-hydrogen battery adopts the positive limit, the low specific capacity of the nickel oxide positive electrode will seriously affect the battery capacity and other performance indicators. Therefore, improving the overall performance of the positive electrode, especially the electrochemical performance, is an urgent task for the industry. [0003] The manufacture of circular nickel-metal hydride batteries includes the following process: firstly, the active material and additives are ...
Claims
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IPC IPC(8): H01M10/28H01M2/26H01M50/534H01M50/536
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 钟发平何策衡陈风
Owner 先进储能材料国家工程研究中心有限责任公司