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Improved energy storage device

一种储能装置、充电能力的技术，应用在车辆储能、运输和包装、电容器型半电池和一次或二次半电池等方向，能够解决缩短电池潜在寿命等问题

Inactive Publication Date: 2010-02-03
COMMONWEALTH SCI & IND RES ORG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will significantly reduce the potential life of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0202] Reference example 1

[0203] prepared with such figure 1 and 2 A suitable lead-acid based energy storage device for experimental purposes with the arrangement schematically shown in .

[0204] The device contains two composite negative electrodes (1), and the composite negative electrode (1) contains a current collector (2), and the battery negative electrode material (3) is pasted on the current collector (2). Each face of the electrode material has a coating of capacitor electrode material (4), thereby forming a composite negative electrode. The device also contains a lead dioxide positive electrode (5), which may or may not contain additive materials, depending on the experiment. Positive and negative electrodes such as figure 1 The alternating arrangement shown in is arranged in the battery compartment (7). The lead dioxide positive electrode (5) can be 20-500 mm wide, 20-1200 mm high, and 0.6-5 mm thick. The width and height dimensions of the composite negati...

Embodiment 3

[0228] below and Figure 9 The discharge and charge process of the positive plate and the dissolution of lead sulfate in different concentrations of sulfuric acid solutions are shown in .

[0229] Discharge process:

[0230]

[0231] Charging process:

[0232]

[0233] During discharge, the conversion of lead dioxide to lead sulfate occurs in two steps. First, lead dioxide and HSO at the positive plate 4 - and H + Reaction to form Pb 2+ , SO 4 2- and H 2 O, the so-called "dissolution process" (reaction 1). Then, Pb 2+ with SO 4 2- combined to form PbSO 4 , the so-called "deposition process" or "precipitation process" (reaction 2). The first step is an electrochemical reaction and thus involves electron movement and migration. Electrons enter the positive plate from the opposite (counter) negative plate and move to the reactive site (ie, lead dioxide), where electron transfer occurs. The movement of electrons in the positive plate material occurs through c...

Embodiment 5

[0252] Curve used in the present embodiment and reference example 2 Figure 6 Used similarly. Five cells were constructed with positive and negative plates having the same width and height dimensions (ie, 44 mm wide and 71 mm high) but with different thicknesses, densities, and positive plate material additives. The cells were subjected to the same test procedure as described in Reference Example 2. The test results are in Figure 13 shown in . The conditions (i.e. plate thickness, density, additives) and properties applied to each battery are as follows:

[0253] (i) As shown in curve 51, the thickness of the positive plate of the control battery is 1.55 mm, and the paste density is 4.0 g cm -3 , no additives; the thickness of the negative plate is 1.65mm, and the paste density is 4.1gcm -3 , No capacitor material coating. The battery completed 45,000 cycles and failed due to the performance of the positive plate.

[0254] (ii) As shown in curve 52, the thickness of the ...

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Abstract

An energy storage device comprising at least one negative electrode, wherein each negative electrode is individually selected from (i) an electrode comprising negative battery electrode material; (ii)an electrode comprising capacitor electrode material; (iii) a mixed electrode comprising either - a mixture of battery and capacitor electrode material or - a region of battery electrode material anda region of capacitor electrode material, or - a combination thereof, and wherein the energy storage device either comprises at least one electrode of type (iii), or comprises at least one electrodeof each of types (i) and (ii), - at least one positive electrode, wherein the positive electrode comprises positive battery electrode material and a charging ability-increasing additive, such as one or a mixture of: (a) carbon nanomaterial, vapour grown carbon fibre, fullerene, or a mixture thereof, and (b) tin dioxide conductive materials.

Description

Background of the invention [0001] The present invention relates to energy storage devices, including lead-acid batteries, as well as electrodes and energy storage devices comprising such electrodes. [0002] There is an increasing need for batteries that can draw high currents from the battery during different phases of operation while supplying smaller, longer-duration currents for other phases of operation. Such batteries also need to be able to be efficiently charged at both high and low charge rates. Applications for these batteries include use in conventional automotive battery applications, electric and hybrid electric vehicles, battery-powered vehicles such as forklifts, renewable energy applications that require auxiliary battery power to smooth the power supply such as solar panels and wind turbines, and backup power applications such as UPS. [0003] While significant progress has been made in the development of new batteries and energy supply networks for use in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/00H01M10/06H01M10/36H01M4/14H01M10/20H01M10/38H01M4/96H01M10/28H01M12/00H01G11/32H01G11/46H01G11/48H01M4/02
CPCH01G11/00H01G11/22Y02E60/126H01M4/73H01M12/005H01M10/06Y02T10/7016H01M10/4235Y02E60/13H01G11/32H01M10/08H01M2004/028H01M4/56H01G11/46H01M2004/021H01G11/04H01M4/62Y02T10/7022H01G11/12Y02E60/128H01G11/36Y02T10/70Y02E60/10Y02P70/50
Inventor L·T·林J·古河
Owner COMMONWEALTH SCI & IND RES ORG
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