Method for manufacturing ultra-high temperature overcharge-resistant long-life Ni-MH battery
A nickel-metal hydride battery, long-life technology, applied in the direction of nickel storage battery, alkaline storage battery, alkaline storage battery electrode, etc., can solve the problems of high cost, low high temperature efficiency, overcharge resistance, unreported and scientific and technological applications, etc. The effect of improving the resistance, facilitating the formation, and increasing the diffusion speed
Active Publication Date: 2015-09-09
BST POWER SHENZHEN
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Problems solved by technology
How to make environment-friendly Ni-MH products (the high-temperature performance of lithium batteries commercialized at the same time as Ni-MH has not been effectively solved, and the cost is also more expensive than Ni-MH) to achieve the overcharge resistance of Ni-Cd batteries—that is, ICEL1010 E50 or E55 is a global concern technical issues
At present, domestic Ni-MH battery products have low efficiency (70%) at 70°C high temperature, 90% charging efficiency at 55°C, and 1000 cycle life (IEC61951 §7.5.1.2), and the overcharge resistance performance has not been reported and applied for technology
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[0041] Such as figure 1 As shown, the present invention discloses a method for manufacturing an ultra-high temperature overcharge-resistant long-life Ni-MH battery, comprising:
[0042] Making the positive electrode sheet includes the following steps:
[0043] ① Stir 9.5Kg pure water, 5Kg CMC (2%), and 5Kg spherical nickel for 10-20 minutes;
[0044] ② Add 45Kg spherical nickel and stir for 20-30 minutes;
[0045] ③ Add 2Kg PTFE (60%) and stir for 5-15 minutes to obtain qualified solid content slurry;
[0046] ④ sieving;
[0047] ⑤ Paddle pulling, the solid content slurry is pulled and baked through the nickel foam matrix;
[0048] ⑥ Sheet production, cutting the positive electrode substrate into the size of each process model, cleaning the powder, spot welding the tab (nickel sheet), and pasting the tape to complete the positive electrode sheet production process.
[0049] Making the negative electrode sheet includes the following steps:
[0050] ① Stir 1.15Kg pure wate...
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Abstract
The present invention provides a method for manufacturing an ultra-high temperature overcharging-resistance long service life nickel-hydrogen battery. The method comprises positive electrode sheet production steps and negative electrode sheet production steps. The method has the following beneficial effects that: other additive components are not required during positive electrode material preparing, and the advantage of low compacted density of the positive electrode and the negative electrode can be provided for making an electrical core material rapidly achieve chemical system equilibrium and increasing alkaline feeding speed and a diffusion rate of an alkaline solution inside the electrical core so as to easily achieve formation, capacity separation and consistency improvement.
Description
technical field [0001] The invention relates to the field of batteries, in particular to a method for manufacturing an ultra-high-temperature, overcharge-resistant and long-life Ni-MH battery. Background technique [0002] Domestic high-temperature nickel-metal hydride batteries have a charging efficiency of around 90% at 55 degrees Celsius. Various additives are generally used in the selection of technical materials, and the technical standards generally meet the high temperature standard of IEC61951-2. [0003] Ni-MH high-temperature battery research and breakthroughs are mainly in three aspects. 1. High temperature charging efficiency is improved; 2. Electrode expansion is controlled; 3. Electrolyte is abundant in the closed structure. The service life of the energy storage device (battery) used in the emergency light market is required to be about 4 years. The battery in the emergency light is discharged for 1 to 3 hours during a power failure within four years, and is ...
Claims
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IPC IPC(8): H01M4/28H01M4/30H01M4/32H01M10/30
CPCY02E60/124Y02E60/10
Inventor 陈平胡章勇马国峰
Owner BST POWER SHENZHEN