CN101136494A - Acid-adding method of minisize lead acid accumulator - Google Patents

Abstract

This invention relates to an acid-adding method for micro-lead-acid batteries including: welding a battery a shell, then dipping it in acid for about 20min and then taking it out and welding lead on it, covering and formatting it, which avoids corrosion to the lead by acid and contacts plate packs with acid fully so as to increase initial content of the batteries and prolong their life time and turns the process of acid-adding from the original one-by-one to the current finishing at one run to increase the production efficiency.

Description

Acid-adding method of minisize lead acid accumulator

Technical field

The present invention relates to a kind of acid-adding method of minisize lead acid accumulator, relate in particular to a kind of acid-adding method of miniature valve controlled sealed lead-acid accumulator.

Background technology

The volume of minisize lead acid accumulator is less, and operating voltage is generally 2V-12V, can be used for as compact electric apparatus equipment such as electric mosquito flap, Lawn lamp, electronic toys.The characteristics of this class battery are little except volume, outside the low price, in the use that discharges and recharges, have low discharging current, stable performance, and memory-less effect can discharge and recharge characteristics such as use at any time.But because of its special profile and volume, in the process of producing, acid-adding method become direct influence its one time discharge time length and recycle the key of important performance such as life-span length.At present, the miniature valve-regulated lead-acid battery acid-adding method that existing most producers use is equal to the acid-adding method of small-sized valve-regulated lead-acid battery, vacuumizes after the promptly first capping to add acid: the concrete operations step is after battery pack installs, and vacuumizes to add acid; With respect to adding for the acid of the small-sized VRLA battery of routine, minicell will increase at least 2 times the number of times that vacuumizes because of the battery case intracorporeal space causes vacuum to add sour number of times more for a short time.So acid-adding method has following problem

1), to add sour process required time longer, the production cycle is long;

2) cause the corrosion at monomer bus-bar and terminal welding lead place, easily, the easier lead-in wire that causes corrodes in production process subsequently, causes battery to recycle life and shortens, even can't use;

3), battery adds acid amount and often is difficult to guarantee, is prone to the acid deficient phenomenon utmost point group can not contact with acid fully, causes battery discharge time to reduce, the cycle life reduction.

Summary of the invention

The objective of the invention is at the problems referred to above, a kind of acid-adding method of minisize lead acid accumulator is provided, guarantee battery lead not the burn into acid nonleakage, more greatly shortened production cycle of battery when enhancing productivity, improved the qualification rate of battery production process simultaneously.

Technical scheme of the present invention is: a kind of acid-adding method of minisize lead acid accumulator comprises the steps:

1) with electrolyte to utmost point group being housed, not having welding lead and unsealed semi-finished product battery to steep sour 18-22 minute;

2) soaked battery drain pan is suitable for reading vertically places downwards, washes then, carries out drying again;

3) cut off the lug top by the part of acid corrosion, solder taul then;

4) drip middle cover glue, the sealing middle cover;

5) put on the shelf and change into.

Beneficial effect of the present invention is: the present invention adds the acid-adding method of sour rear seal-cover earlier, be about to battery cell and be welded into shell, before welding lead not, earlier to the acid of battery bubble, go into after the acid solution of the amount of meeting the requirements through about 20 minutes bubbles, take out battery welding lead, buckle closure again and change into; Add acid as the method, solved lead-in wire, utmost point group energy is contacted with acid enough fully, thereby avoided occurring the acid deficient situation by the problem of acid corrosion; Prolong battery cycle life, increased its initial capacity; Battery adds sour operation and proceeds to present disposable batch one by one by each original battery and finish, and has improved production efficiency, adds sour time ratio and can shorten 70～90% originally.

Description of drawings

Fig. 1 is the normal miniature storage battery acidification process chart of existing use;

Fig. 2 is a minisize lead acid accumulator acid adding process flow chart of the present invention.

Embodiment

Assemble 10 2V0.5AH size battery as sample, adopting as shown in Figure 2, technological process adds acid.And test battery performance.

Take following flow process to assemble on above-mentioned 10 batteries

(1) wrapper sheet

(2) add acid

1. checking acid solution proportion, is 1.325～1.335g/cm in the time of 25 ℃ ³, temperature is no more than 30 ℃; The sour total amount of verification and requirement differ and are no more than 1% under non-stop-machine state, and the stream acid amount of each pipe of vacuum acid adding machine is more or less the same in 1ml; The stream acid amount of each pipe of common acid adding machine is more or less the same in 0.2ml.2V0.5AH it is as shown in table 1 that battery adds the acid amount.

Table 1

Battery size	Acid proportion	Add acid amount (the single lattice of ml/)	Single battery adds sour weight (g)
				2V0.5AH	1.33	6.0	8.0

2. battery fitly is placed in the glue groove, take by weighing the weight of 10 batteries, note, and the battery of weighing carried out mark, and dip acid with the glue cup, pour in the battery case and pick up counting, note all must filling acid in each single lattice, oozed as the acid in the battery case, must add full acid, guaranteed to have in the every single lattice of all batteries the acid of sufficient quantity.After treating that every batch of battery adds acid and the time reaches 18-22 minute, acid unnecessary in the battery is gone, be upside down in Lou in the frame; After 5 minutes, the acid of rinsing battery surface well with running water is during flushing, leaking frame must set up, and battery must not be ducked in drink, and dries up the globule of battery surface then with air gun, battery turned over put, took by weighing 10 battery weight in wet bases of dry weight, the acid amount that adds in the counting cell.

(3) test: battery was inverted 30 minutes, is washed battery then, solder taul drips glue, sealing middle cover, and the button safety valve changes into, and then tests the performance of these 10 batteries.

1. table 2, table 3 are to use the performance test data and battery (numbering is respectively 11-20) the data contrast of using original acid adding process assembling of Experimental cell (numbering is respectively 1-10) behind the present invention.

Table 2 Experimental cell 1C discharge data

The battery numbering	1	2	3	4	5	6	7	8	9	10
											Time	36′	36′05″	34′50″	37′	37′30″	37′20″	33′	34’	33′50″	36′

Table 3 control cell 1C discharge data

The battery numbering	11	12	13	14	15	16	17	18	19	20
											Time	28′	30′05″	29′01″	28′	31′30″	28′20″	29′	32′	30′50″	28′

Above data can show, in the last table 1C discharge of two kinds of batteries can both reach GB GB T19639.1-2005) require greater than 27 minutes, still, adopt its 1C discharge pond time ratio control cell of Experimental cell long 1-10 minute behind the present invention.

2. above-mentioned Experimental cell and control cell are respectively got 5 and carry out the cycle life test, data are shown in table 4, table 5.

Table 4 Experimental cell cycle life test data

Table 5 control cell cycle life test data

Above-mentioned two class battery 1C discharge data are compared, on average the time of putting is 21 ' 31 when the invention provides battery circulation 200 times "; be 19 ' 38 average discharge time during control cell circulation 150 times ", the original technology of discharge pond time ratio has prolonged 7-13 minute, and battery has prolonged 20% useful life.

3. measure the battery weight and the internal resistance of above-mentioned Experimental cell and control cell, shown in tables of data 6, the table 7.

Table 6 Experimental cell weight and internal resistance

The battery numbering	1	2	3	4	5	6	7	8	9	10
											Dry weight (g)	28	27	27	29	26	27	26	26	27	27
Weight in wet base (g)	35	35	35	36	34	35	34	34	35	34
											Internal resistance (Ω)	127.6	126.6	127.0	119.8	132.2	125.2	135.3	137.5	130.6	128.6

Table 7 control cell weight and internal resistance

The battery numbering	11	12	13	14	15	16	17	18	19	20
											Dry weight (g)	27	28	27	27	26	26	26	27	28	26
Weight in wet base (g)	31	31	30	36	31	29	30	34	35	33
											Internal resistance (Ω)	182.1	119.9	155.2	164.0	110.2	181.2	152.8	137.5	130.6	131.6

The test data explanation of last table two kind of battery the invention provides technology and adds acid evenly, adds the acid amount and is controlled at about 6ml.The internal resistance of cell has reduced about 13% than original technology, has improved the high-rate battery discharge performance.

(4) battery is carried out in experiment and leak the acid test.

Battery surface cleaning is clean, dry up with thermal current, 10 batteries are tied together, stand upside down and be fixed on the vibration machine, packing paper plate on the table top, battery underneath PH test paper vibrates 2 hours (amplitude 4mm, vibration frequency 50Hz).

After vibration finishes, check the PH test paper, the PH test paper does not redden as a result, shows that battery surface does not have the acid of leakage.

The described 2V0.5AH battery of the foregoing description, add acid by traditional acid adding process flow process, per 30 people per working day (8 hours) can finish battery and add about 3000 of acid, the invention provides technology can adopt batch to add acid simultaneously, per 30 people per working day (8 hours) can finish battery and add about 15000 of acid, add sour process and can realize mechanization, add the original technology of sour time ratio and can shorten 70-90%.Press pet-valve controlled sealed lead-acid storage battery technical standard (GB/T 19639.1-2005) to the battery outward appearance, service check, qualification rate reaches more than 95%, has improved 10%-20% than the 75%-85% of original technology.

Experiment conclusion: draw by above-mentioned analysis of experimental data, acid-adding method of minisize lead acid accumulator provided by the invention, improved production efficiency, the precise control of acid amount, single lattice add the acid amount and are controlled at about 6ml, battery initial capacity, charge-discharge performance prolong about 10% than original technology, and can effectively solve battery and leak sour problem.

Claims (1)

1. acid-adding method of minisize lead acid accumulator is characterized in that: comprises the steps,

1) with electrolyte to utmost point group being housed, not having welding lead and unsealed semi-finished product battery to steep sour 18-22 minute;

2) soaked battery drain pan is suitable for reading vertically places downwards, washes then, carries out drying again;

3) cut off the lug top by the part of acid corrosion, solder taul then;

4) drip middle cover glue, the sealing middle cover;

5) put on the shelf and change into.

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