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Liquid injection mode of nickel battery and nickel battery

A nickel battery and liquid injection technology, which is applied to nickel storage batteries, alkaline storage batteries, battery pack components, etc., can solve problems such as richness and nickel battery drying up

Pending Publication Date: 2020-05-01
SHENZHEN HIGHPOWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the present invention proposes a liquid injection method for a nickel battery and a nickel battery, which uses a gel state substance to store the electrolyte or its solvent, which solves the disadvantages of the prior art that the initial liquid injection volume needs to be excessively rich, and when the battery gradually dries up After that, it can continuously release electrolyte or solvent to compensate, which solves the problem of drying up of nickel batteries

Method used

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  • Liquid injection mode of nickel battery and nickel battery
  • Liquid injection mode of nickel battery and nickel battery
  • Liquid injection mode of nickel battery and nickel battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Example 1 provides a nickel-metal hydride battery, which is basically prepared in the same way as the existing 50AA2700 ultra-high-capacity nickel-hydrogen battery, except that OH is injected first - 2.40g of electrolyte solution with an ion concentration of 10mol / L and a water content of 66%, additionally fill the center hole with a gel formed by 1wt% xanthan gum + 1wt% sodium polyacrylate, the OH of the filled gel - The ion concentration is 9mol / L, the water content is 69%, the center hole is filled, and the gel filling amount is 0.18g.

[0033] Take the Ni-MH batteries of Comparative Example 1 and Example 1 respectively, and the comparison diagram of the two in 1C cycle life is as follows figure 1 As shown, the total amount of solvent in Comparative Example 1, i.e. the total amount of water, is 1.58g (2.40g×66%=1.58g), and the total amount of water in Example 1 is 1.70g (2.40g×66%+0.18g×69%=1.70 g), which is equivalent to injecting 0.12g more pure water, ...

Embodiment 2

[0036] Embodiment 2: Embodiment 2 provides a nickel-hydrogen battery, which is basically the same as the existing 50AA2200 ultra-low-cost nickel-hydrogen battery. The difference is that OH is injected first - The ion concentration is 12mol / L, the electrolyte solution 2.80g that water content is 61.5%, the gel that additionally fills 3wt% sodium polyacrylate in the center hole, the OH of the filled gel - The ion concentration is 12mol / L, the water content is 60.5%, the center hole is filled, and the gel filling amount is 0.60g.

[0037] Take the Ni-MH batteries of Comparative Example 2 and Example 2 respectively, and the comparison diagram of the two in 1C cycle life is as follows: figure 2 As shown, the total amount of solvent in Comparative Example 1, i.e. the total amount of water, is 1.78g (2.90g×61.5%=1.78g), and the total amount of water in Example 1 is 2.09g (2.80g×61.5%+0.6g×60.5%=2.09 g), which is equivalent to adding 0.31g of pure water, which is an increase of 17%....

Embodiment 3

[0040] Embodiment 3: Embodiment 3 provides a nickel-hydrogen battery, which is basically the same as the existing 50AA1300 long-life nickel-hydrogen battery. The difference is that the OH is injected first - 2.60g of electrolyte solution with an ion concentration of 7.5mol / L and a water content of 69%, and additionally fill the center hole with 1wt% Yb(OH) 3 +0.5wt% agarose formed gel, OH of the filled gel- The ion concentration is 7.3mol / L, the water content is 68.5%, the center hole is filled, and the gel filling amount is 0.70g.

[0041] Take the Ni-MH batteries of Comparative Example 3 and Example 3 respectively, and the comparison chart of the two at 10A cycle life is as follows: image 3 As shown, the total amount of solvent in Comparative Example 3, i.e. the total amount of water, is 1.90g (2.75g×69%=1.90g), and the total amount of water in Example 3 is 2.27g (2.60g×69%+0.7g×68.5%=2.27 g), which is equivalent to adding 0.37g of pure water, which is an increase of 19.5%...

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Abstract

The invention discloses a liquid injection mode of a nickel battery and the nickel battery. In the liquid injection mode, an electrolyte is injected into the nickel battery firstly, then gel is injected, the gel comprises a gel-state substance and a solvent, and the OH<-> concentration of the gel is smaller than or equal to the OH<-> concentration of the electrolyte. On one hand, the property of gel formed by a gel-state substance and a solvent is utilized, free flow of the solvent is bound, therefore, the purpose of storing part of the electrolyte or the solvent thereof is achieved; when thebattery is gradually dried up, the formed gel can continuously release an electrolyte or a solvent thereof for compensation, the effect of delaying battery drying is thus achieved, and on the other hand, the concentration of the electrolyte can be equivalently improved, so that the purpose of lower attenuation or attenuation delaying is achieved, the problem of drying of the nickel battery is solved, and a series of nickel battery problems caused by the liquid injection amount are fundamentally solved.

Description

technical field [0001] The invention relates to the technical field of nickel batteries, in particular to a nickel battery liquid injection method and the nickel battery. Background technique [0002] As a reversible electrode with excellent electrochemical performance, nickel electrode is widely used in the positive electrode of alkaline secondary batteries, such as common nickel-hydrogen batteries, nickel-zinc batteries, nickel-cadmium batteries, etc. However, nickel electrodes still have a series of problems due to the inherent characteristics of the active materials used, especially for lean liquid high-capacity batteries and flooded liquid batteries. [0003] The active material used in nickel electrodes is generally nickel hydroxide, using Ni(OH) 2 The reversible redox reaction with NiOOH is a flow reaction, and the conversion process between the two is actually a process of proton extraction and intercalation. Therefore, the electrolyte used in the nickel electrode n...

Claims

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Application Information

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IPC IPC(8): H01M2/36H01M10/30
CPCH01M10/30H01M50/60Y02E60/10
Inventor 姜婉婷赵磊刘金锁蔡小娟
Owner SHENZHEN HIGHPOWER TECH CO LTD
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