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High-capacity long-service-life double-bag nickel-hydrogen battery

A nickel-hydrogen battery, long-life technology, applied in the direction of nickel storage battery, secondary battery, battery electrode, etc., can solve the problems of easy thermal runaway, unsafe, difficult to prepare large-capacity batteries, short cycle life, etc., to improve the powder resistance Chemical and anti-corrosion ability, improve the utilization rate of active material, improve the effect of high temperature performance

Active Publication Date: 2018-11-06
河南省恒明新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the current short cycle life and unsafe thermal runaway of nickel-hydrogen batteries, and it is difficult to prepare large-capacity batteries for industrial application, and provides a double-pocket-type nickel-hydrogen battery with large capacity and long life. Nickel batteries have excellent safety, long cycle life and good resistance to overcharge and overdischarge characteristics, can meet the special requirements of the industrial field, and are expected to replace the existing nickel-cadmium pouch batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] [Ni 0.8 al 0.2 co 0.05 (OH) 2 ]·[(BO 2 - ) z mH 2 O] Preparation of cathode active materials

[0028] First, nickel chloride is made into a nickel salt solution with a molar concentration of 1.8mol / L with deionized water that removes carbon dioxide, and aluminum sulfate and cobalt sulfate are dissolved in a molar ratio of 0.8:0.2:0.05 in the molar ratio of nickel, aluminum, and cobalt. In the sodium hydroxide solution with a concentration of 4mol / L, under the protection of inert gas nitrogen, slowly add the nickel salt solution dropwise into the reaction kettle equipped with the composite alkaline solution, the reaction temperature is 55°C, and the pH of the final reaction mixture is = 10.5, after the completion of the reaction, age the mother liquor at 55°C for 36h, then filter; dry the filter cake at 125°C for 2h, and grind it into powder, pass through a 200 mesh sieve for later use, transfer 8g of the obtained powder to the prepared mole In a sodium metaborat...

Embodiment 2

[0037] [Ni 0.9 al 0.1 Ca 0.05 (OH) 2 ]·[(CO 3 2- ) z mH 2 O] Preparation of cathode active materials

[0038] First, use deionized water to remove carbon dioxide to form a nickel salt solution with a molar concentration of 2.0 mol / L, and dissolve aluminum sulfate and calcium chloride in a molar ratio of 0.9:0.1:0.05. In the sodium hydroxide solution with a concentration of 5mol / L, the nickel salt solution is slowly added dropwise to the reaction kettle equipped with the composite alkaline solution, the reaction temperature is 55°C, and the pH of the final reaction mixture is 10.5. After the reaction is completed, The mother liquor was aged at 55°C for 36 hours, and then filtered; the filter cake was dried at 125°C for 1 hour, and ground into powder, and passed through a 200-mesh sieve to obtain Ni 0.9 al 0.1 Ca 0.05 (OH) 2 ]·[(CO 3 2- ) z mH 2 O powder samples.

[0039] will Ni 0.9 al 0.1 Ca 0.05 (OH) 2 ]·[(CO 3 2- ) z mH 2 O adopts the method same as e...

Embodiment 3

[0047] [Ni 0.7 al 0.3 Y 0.05 (OH) 2 ]·[(Cl - ) z mH 2 O] Preparation of cathode active materials

[0048] First nickel chloride is made into a nickel salt solution with a molar concentration of 2.0mol / L with deionized water that removes carbon dioxide, and aluminum chloride and yttrium chloride are dissolved in a ratio of 0.7:0.3:0.05 with the molar ratio of nickel, aluminum, and yttrium. into a sodium hydroxide solution with a molar concentration of 3 mol / L, and under the protection of inert gas nitrogen, slowly drop the nickel salt solution into a reaction kettle equipped with a composite alkaline solution, the reaction temperature is 60°C, and the mixture is finally reacted pH=11, after the completion of the reaction, the mother liquor was aged at 70°C for 48h, then filtered, the filter cake was dried at 125°C for 2h, and ground into powder to obtain [Ni 0.7 al 0.3 Y 0.05 (OH) 2 ]·[(Cl - ) z mH 2 O] Powder samples.

[0049] Preparation of pocket nickel positiv...

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Abstract

The invention discloses a high-capacity long-service-life double-bag nickel-hydrogen battery. A battery pole plate consists of a bag type nickel positive electrode plate, a bag type hydrogen storage alloy negative electrode pole plate and a multilayer composite membrane or separation electrode grid positioned between the bag type nickel positive electrode plate and the bag type hydrogen storage alloy negative electrode pole plate; an electrode material of the bag type nickel positive electrode plate is prepared from positive electrode active materials, conducting agents, additives and bondingagents; an electrode material of the bag type hydrogen storage alloy negative electrode pole plate is prepared from hydrogen storing alloy powder, conducting agents and bonding agents; electrolyte isa KOH alkaline solution containing additives in a rich liquid state. Through positive and negative electrode formula optimization, electrolyte formula optimization, electrode preparation method process improvement and separation plate optimization selection, the electrode structure of the positive and negative electrodes is greatly optimized; the utilization rate of positive and negative electrodeactive substances is improved; the internal resistance of the battery is optimized and reduced; the chalking resistant and anticorrosion capability of negative electrode hydrogen storage alloy is improved; the low-temperature performance of the battery is improved; the cycle service life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of nickel-hydrogen batteries, in particular to a double-pocket-type nickel-hydrogen battery with large capacity and long life. Background technique [0002] Large-capacity pouch batteries (nickel-cadmium batteries) have the characteristics of safety, durability, and long cycle life. They are currently widely used in industrial fields such as railway locomotives, mines, armored vehicles, and aircraft engines as starting or emergency power supplies. Large-capacity industrial batteries are a major component of rail transit vehicles, and their main task is to ensure that the vehicle has enough power to maintain the electrical equipment to meet the time requirements for emergency power supply in the event of a main power supply failure. Large-capacity battery cells have become the development trend of rail transit batteries, and good electrical performance and safety performance are the basic requirements for rai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/52H01M4/62H01M10/26H01M10/30H01M10/28
CPCH01M4/364H01M4/366H01M4/383H01M4/52H01M4/628H01M10/26H01M10/281H01M10/30H01M2300/0014Y02E60/10Y02P70/50
Inventor 上官恩波段玉兰刘志刚李长海郭振龙
Owner 河南省恒明新能源有限公司
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