CN1332471C

CN1332471C - Colloidal electrolyte of lead acid accumulator

Info

Publication number: CN1332471C
Application number: CNB2005100608569A
Authority: CN
Inventors: 刘孝伟
Original assignee: 周明明
Current assignee: Chaowei Power Supply Co Ltd
Priority date: 2005-09-23
Filing date: 2005-09-23
Publication date: 2007-08-15
Anticipated expiration: 2025-09-23
Also published as: CN1750312A

Abstract

The present invention discloses colloidal electrolyte of a lead acid accumulator. The component of the present invention is composed of nanometer silicon dioxide (SiO2), sodium carboxymethyl cellulose salt (CMC), tin sulfate (SnSO4), sulfuric acid (H2 SO4) and water. The components of the following proportion: the nanometer silicon dioxide (SiO2) is from 0.2% to 5%, the sodium carboxymethyl cellulose salt (CMC) is from 0.01% to 0.3%, the tin sulfate (SnSO4) is from 0.05% to 0.6%, the sulfuric acid (H2SO4) is from 35% to 45%, and the water is from 49.1% to 64.74%. The present invention has the advantages that improved colloidal electrolyte can improve charge acceptance and the capacity of accumulators, ensures the consistency of the accumulators, reduces water loss, protects electrode plates, and improves cyclic life of the accumulators.

Description

A kind of colloidal electrolyte of lead acid accumulator

Technical field

The present invention relates to be used for the colloidal electrolyte prescription field of lead acid accumulator, relate in particular to a kind of accumulator colloid electrolyte that assembles with the AGM dividing plate that is suitable for.

Technical background

Recently, the valve controlled sealed lead-acid accumulator development is very fast, extensively is useful for motorcycle, emergency power supply, portable power source, motor vehicle etc.Also more and more higher to storage battery cycle performance, maintenance-free performance and charging adaptability.The electromobile battery that particularly recycles deeply requires higher, want cube little, capacity is big, its depth of discharge is generally 70%～100%, require 8～10 hours charging intervals, the cycle-index that requirement reaches is added many storage battery series connection of general needs and is used more than 350 times, and conforming problem can have influence on the whole service life of storage battery.

Existing storage battery, owing to will satisfy electric motor car entrucking requirement, the volume low capacity is big, therefore storage battery adds electrolyte volume little (about 8ml/Ah), concentration height (about 45%), this and above-mentioned requirements are incompatible, following bad phenomenon occurs: the charge in batteries difficulty is bigger, need take higher charging voltage charging, and fluid loss is big, corrosion is quickened, summer occurs the storage battery that large tracts of land causes the heating distortion to scrap because of dehydration, the difficulty of charging winter is big, can fill, capacity attenuation is very fast, a large amount of " backwardness " storage batterys occur.

Traditional colloidal electrolyte, have that internal resistance is big, discharge performance descends, easily be full of cracks, aquation, be not suitable for the defectives such as storage battery with the assembling of AGM dividing plate, can not satisfy above-mentioned requirements.

Summary of the invention

The objective of the invention is at traditional colloidal electrolyte, have that internal resistance is big, discharge performance descends, easily be full of cracks, aquation, be not suitable for the defectives such as storage battery with the assembling of AGM dividing plate, the improvement of making provides a kind of colloidal electrolyte of lead acid accumulator that assembles with the AGM dividing plate that is suitable for.

Purpose of the present invention is achieved through the following technical solutions: a kind of colloidal electrolyte of lead acid accumulator is characterized in that: its component is by nanometer grade silica (SiO ₂), sanlose (CMC), stannous sulfate (SnSO ₄), sulfuric acid (H ₂SO ₄) and the water composition, its set of dispense ratio is: nanometer grade silica (SiO ₂) 0.2%～0.5%, sanlose (CMC) 0.01%～0.3%, stannous sulfate (SnSO ₄) 0.05%～0.6%, sulfuric acid (H ₂SO ₄) 35%～45%, water 53.6%～64.74%.

Its effect is the nanometer grade silica (SiO by add 0.2%～0.5% in colloidal electrolyte ₂), become the main component of gel, have the effect of absorption sulfuric acid, improve discharging product and make it generate PbSO ₄The time generate PbSiO ₃, make PbSO ₄Contain PbSiO in the crystallization ₃(dissolving easily), the stannous sulfate (SnSO of adding 0.05%～0.6% ₄), Sn in charging process ²⁺Ion precipitation generates metallic tin to the negative plate surface, increases conductivity, thereby improves charge acceptance, and improved capacity simultaneously; In colloidal electrolyte, add 0.01%～0.3% sanlose (CMC), have the nanometer grade silica of preventing (SiO ₂) and the effect of other species precipitate, also have the effect that keeps moisture simultaneously, reduce dehydration, and participate in gel, play the effect of fastening pole plate, protection pole plate.Main component in the prescription also has 35%～50% sulfuric acid (H in addition ₂SO ₄), and water is as the reactant that discharges and recharges.Generally speaking, the present invention has improved the charge in batteries ability to accept, improves battery capacity, guarantees the storage battery consistency, and reduces fluid loss, protects pole plate, can improve the cycle life of storage battery greatly.

Description of drawings

Fig. 1 is the present invention and common electrolyte battery life-span correlation curve figure

Embodiment

Below in conjunction with Figure of description, the present invention will be further described by specific embodiment.

1 one kinds of colloidal electrolyte of lead acid accumulator each components of embodiment precentagewise meter part is as follows:

Nanometer grade silica (SiO ₂) 0.2%

Sanlose (CMC) 0.3%

Stannous sulfate (SnSO ₄) 0.5%

Sulfuric acid (H ₂SO ₄) 40%

Water 59%

2 one kinds of colloidal electrolyte of lead acid accumulator each components of embodiment precentagewise meter part is as follows:

Nanometer grade silica (SiO ₂) 0.4%

Sanlose (CMC) 0.1%

Stannous sulfate (SnSO ₄) 0.6%

Sulfuric acid (H ₂SO ₄) 35%

Water 63.9%

3 one kinds of colloidal electrolyte of lead acid accumulator each components of embodiment precentagewise meter part is as follows:

Nanometer grade silica (SiO ₂) 0.5%

Sanlose (CMC) 0.2%

Stannous sulfate (SnSO ₄) 0.2%

Sulfuric acid (H ₂SO ₄) 45%

Water 54.1%

From accompanying drawing 1 colloidal electrolyte and common electrolyte battery life-span comparison diagram and table 1, table 2 as can be seen the present invention improved charge acceptance; also improve battery capacity, guarantee the storage battery consistency, and reduce fluid loss; protect pole plate, can improve the cycle life of storage battery greatly.

Table 1 adds SiO ₂And SnSO ₄Influence to charge acceptance

	A (blank)	?B	C
	A (blank)	?B	C	SiO ₂			0.5％
SnSO ₄		?0.5％	0.5％	SiO ₂			0.5％
SnSO ₄		?0.5％	0.5％	H ₂SO ₄	43％	?43％	43％
Charge acceptance	2.41A	?3.85A	4.88A	H ₂SO ₄	43％	?43％	43％

Table 2 adds the influence (6-DZM-10 storage battery circulation experiment) of CMC to dehydration

	A (blank)	B	C
	A (blank)	B	C	SiO ₂	0.5％	0.5％	0.5％
SnSO ₄	0.5％	0.5％	0.5％	SiO ₂	0.5％	0.5％	0.5％
SnSO ₄	0.5％	0.5％	0.5％	CMC	0	0.05％	0.1％
H ₂SO ₄	43％	43％	43％	CMC	0	0.05％	0.1％
H ₂SO ₄	43％	43％	43％	300 circulation fluid losses	68 grams	54 grams	42 grams

Claims

1, a kind of colloidal electrolyte of lead acid accumulator is characterized in that: its component is made up of nanometer grade silica, sanlose, stannous sulfate, sulfuric acid and water, and its set of dispense is such as following:

Nanometer grade silica 0.2%～0.5%

Sanlose 0.01%～0.3%

Stannous sulfate 0.05%～0.6%

Sulfuric acid 35%～45%

Water 53.6%～64.74%.