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High-capacity sodium-nickel-chloride unit flat plate battery and battery pack thereof

A single battery, flat battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of complex sintering preparation process, high battery operating temperature, increase the internal resistance of alumina ceramic tubes, etc., and achieve broad application prospects , long service life, good safety performance

Inactive Publication Date: 2015-06-03
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the small diameter will increase the difficulty of preparing ceramic tubes and limit the tube length in the actual production process (usually less than 300mm), resulting in the current sodium-nickel chloride batteries are relatively small in size, and the single battery capacity is mostly 32~64Ah
As mentioned above, the use of cylindrical or cross-shaped small-diameter ceramic tubes not only complicates the ceramic molding and sintering preparation process, but also leads to low battery capacity, which limits the application field of sodium nickel chloride batteries
At the same time, the tubular ceramic needs a certain wall thickness to maintain its mechanical strength, generally 1.5~2mm, which increases the internal resistance of the alumina ceramic tube and makes the battery operating temperature higher (270~350°C).

Method used

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  • High-capacity sodium-nickel-chloride unit flat plate battery and battery pack thereof
  • High-capacity sodium-nickel-chloride unit flat plate battery and battery pack thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Large-capacity sodium-nickel chloride single battery of the present invention (its structure is as figure 1 shown), mainly including two negative chambers, a positive chamber and positive and negative terminals, the positive chamber is located between the two negative chambers. Among them, the negative electrode chamber is composed of negative electrode cover, metal spring sheet, metal felt or graphite felt from the outside to the inside; the positive electrode chamber is filled with NaAlCl 4 -NaCl-porous nickel positive electrode layer, the current collector is located in the center of the positive electrode layer and runs through the entire positive electrode layer, and the positive electrode chamber is fixed and sealed by the positive electrode sealing ring around it. The positive and negative chambers are separated by a solid electrolyte (diameter 126 mm, thickness 0.1 mm). The metal spring sheet, graphite felt and solid electrolyte are tightly bonded to form a cap...

Embodiment 2

[0026] The large-capacity sodium nickel chloride single battery of the present invention mainly includes two negative electrode chambers, one positive electrode chamber and positive and negative electrode terminals, and the positive electrode chamber is located between the two negative electrode chambers. Among them, the negative electrode chamber is composed of negative electrode cover, metal spring sheet, and metal nickel felt from the outside to the inside; the positive electrode chamber is filled with NaAlCl 4-NaCl-porous nickel positive electrode layer, the current collector is located in the center of the positive electrode layer and runs through the entire positive electrode layer, and the positive electrode chamber is fixed and sealed by the positive electrode sealing ring around it. The positive and negative chambers are separated by a solid electrolyte (side length 286mm, thickness 2mm). The metal spring sheet, metal nickel felt and solid electrolyte are tightly bond...

Embodiment 3

[0028] Such as figure 2 As shown, a large-capacity sodium-nickel chloride battery pack is internally composed of 16 single cells of Example 1 in a 4-parallel and 4-series connection mode, that is, the entire battery pack is composed of 4 strings of small battery packs connected in parallel, and each A series of small battery packs is composed of 4 single cells connected in series. The outside of the battery is equipped with a temperature regulation system, a heat insulation layer for the battery pack, a battery pack shell, and the outermost is the whole battery control system. When operating at 260°C, the battery has an open circuit voltage of 10.3V, a capacity of 800Ah, and an energy storage capacity of 8kWh.

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Abstract

The invention relates to a high-capacity sodium-nickel-chloride unit flat plate battery and a battery pack thereof. The battery is composed of two cathode chambers, an anode chamber and anode and cathode terminals, wherein the anode chamber is arranged between the two cathode chambers; a cathode cover, a metal spring piece, a metal felt or a graphite felt are sequentially arranged inside each cathode chamber from outside to inside; the anode chamber is filled with an anode layer, a current collector is arranged at the center of the anode layer and penetrates through the whole anode layer, and all round of the anode chamber is fixedly sealed by an anode sealing ring; the anode chamber and the cathode chambers are separated through solid electrolytes; and an anode electrode bar connected onto the current collector stretches out of the anode sealing ring to form an anode terminal, and a cathode electrode bar stretches out of the cathode cover to form a cathode terminal. The battery pack comprises unit batteries, a temperature regulating system, a battery pack insulating layer, a battery pack casing and a whole battery control system sequentially from inside to outside, wherein the amount of the unit batteries is 2-100. According to the battery and the battery pack thereof, the unit battery has a large capacity, the operating temperature is low, the structure is simple, the production is convenient, and the cost is low.

Description

technical field [0001] The invention relates to a battery and a battery pack thereof, more specifically to a large-capacity sodium-nickel-chloride single-plate flat battery and a battery pack thereof. Background technique [0002] The sodium-nickel chloride battery is derived from the sodium-sulfur battery, and has many similarities with the sodium-sulfur battery: for example, the solid electrolyte is β”-Al 2 o 3 , the negative electrode is liquid metal sodium. The difference is that the positive electrode, NaNiCl battery is wetted in molten NaAlCl 4 The solid nickel / nickel chloride in the battery replaces the liquid sulfur / sodium polysulfide in the sodium sulfur battery. The sodium-nickel chloride battery retains the advantages of large capacity, high conversion efficiency, and no self-discharge of the sodium-sulfur battery, and also has an inherent overcharge / overdischarge protection function based on its own chemical composition. The energy density of the whole system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36H01M10/39
CPCY02E60/10
Inventor 杨晖魏晓玲杨力萍单世界沈晓冬
Owner NANJING TECH UNIV