CN101217203A

CN101217203A - An ultra-high temperature alkali secondary Ni-MH battery and new creation method

Info

Publication number: CN101217203A
Application number: CNA2008100452323A
Authority: CN
Inventors: 吴国成; 王宗杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-22
Filing date: 2008-01-22
Publication date: 2008-07-09

Abstract

The invention discloses an ultra-high temperature alkaline secondary nickel-metal hydride battery and a new manufacturing method, which relates to a rechargeable secondary battery and the manufacturing field; the invention is mainly applicable to the manufacture of the ultra-high temperature alkaline secondary nickel-metal hydride battery. The technical proposal of the invention is that: appropriate amount of macromolecular fluoride inhibitor is added in a battery anode material, appropriate amount of carbonyl metal oxide is added in a cathode material, a stabilizer is added into an electrolyte, a battery shell adopts an ABS modified polymer, thus the battery can discharge under the ultra-high temperature environment of 80 DEG C so as to improve the discharging performance of the nickel-metal hydride battery.

Description

Ultra-high temperature alkali secondary Ni-MH battery and manufacturing new method

Technical field

The present invention can relate to rechargeable secondary cell and manufacturing field, mainly is applicable to the manufacturing ultra-high temperature alkali secondary Ni-MH battery.

Prior art

Nickel metal hydride batteries is through the development of more than ten years because have that high power capacity compares, pollution-free, long service life, working temperature is wide is widely used.But the Ni-MH battery product working temperature that prior art is produced also is confined between-18 ℃～55 ℃, makes new method as 98125274.5 described batteries of Chinese patent.Owing to, can't satisfy user's instructions for use along with the extensive use, the particularly requirement of particular job ambient temperature (as 60 ℃～80 ℃) of this product.

The objective of the invention is to produce a kind of ultra-high temperature alkali secondary Ni-MH battery, to adapt to 60 ℃～80 ℃ user's instructions for uses under particular job environment.

Summary of the invention

According to above-mentioned purpose, technical scheme of the present invention is: the big molecule fluoride inhibitor of an amount of adding in cell positive material, the an amount of metal carbonyl oxide that adds in negative material, in electrolyte, add stabilizer, battery case adopts ABS polymer-modified, reach battery and under 80 ℃ of ultra-high temperature environment, can discharge, to improve the Ni-MH battery discharge performance.

Concrete grammar is as follows:

1. the making of positive plate

In the making of positive plate, press Ni (OH) ₂68～92%, additive 1～4%, inhibitor 2～8%, the weight ratio of adhesive 5～20% is put into batch mixer and is mixed and make paste, paste is coated on the conducting base again, rolls, cuts into required size after the drying, and soldering polar ear.

2. the making of negative plate

In the making of negative plate, press hydrogen storing alloy powder 70～92%, additive 1～4%, metal carbonyl oxide 2～8%, the weight ratio of adhesive 5～18% is put into batch mixer and is mixed and make paste, paste is coated on the conducting base again, rolls after the drying, cut into required physical dimension, and soldering polar ear.

3. the making of shell, lid

Press the weight ratio of ABS 60～80%, PVC 20～40%, as injection moulding battery case, lid raw material, with injection molding machine and injection mould processing battery case, lid, this battery case, lid weatherability are strong after the dry mixed, good mechanical property, and the anti-aging time is long.

4. the preparation of electrolyte

In the electrolyte of 6N KOH and 0.5N LiOH and deionized water preparation d=1.2～1.3g/ml, add M stabilizer 0.5～2%, more than the mixed dissolution cooling 24h.

5. the making of battery utmost point group

Press the sheet number of desired volume, the positive and negative plate of getting ready is separated with homemade insulating paper, the stack back is connected to lug on the pole, reinstalls in the shell.

6. injection electrolyte

The electrolyte that the prepares amount by 2～6ml/Ah is added in the battery shell one by one.

7. battery seal

With battery cover with the special bonding agent bonding or seam on battery case, promptly finish the described ultra-high temperature alkali secondary of patent of the present invention and belong to Ni-MH battery.

Adopt the ultra-high temperature alkali secondary Ni-MH battery of production of the present invention to have following characteristics:

1. battery stops 0.5～1h at 20 ℃ ± 5 ℃ following 0.1C charging 11h, under the same temperature with the current discharge of 0.2C to 1.0V, more than the discharge time 320min, efficiency for charge-discharge reaches 99%;

2. battery is put into 60 ℃ ± 2 ℃ environment and is placed 48h at 20 ℃ ± 5 ℃ following 0.1C charging 11h, under same temperature with the current discharge of 0.2C to 1.0V, more than the discharge time 190min;

3. battery is put into 70 ℃ ± 2 ℃ environment and is placed 6h at 20 ℃ ± 5 ℃ following 0.1C charging 11h, under same temperature with the current discharge of 0.2C to 1.0V, more than the discharge time 240min;

4. battery is put into 80 ℃ ± 2 ℃ environment and is placed 5h at 20 ℃ ± 5 ℃ following 0.1C charging 11h, under same temperature with the current discharge of 0.2C to 1.0V, more than the discharge time 220min;

5. battery life is more than 500 times.(method of testing and the results are shown in Table 3)

Compared with prior art, the present invention has the following advantages:

1. production technology is simple, low cost of manufacture.Positive and negative electrode has added inhibitor and the metal carbonyl oxide optimized respectively when producing, make efficiency for charge-discharge reach 99%, has given full play to the effect of active material.

2. improved cell discharge performance under the hyperthermal environments.Battery is after long-time placement the under 60 ℃～80 ℃ hyperthermal environments, and satisfied in particular surroundings discharge performance requirement at 190min～240min discharge time.

Embodiment

Produced more than totally 100 batch according to the method for the invention, tens thousand of on the battery of 7Ah～500Ah.

Performance test is as follows;

(1) normal temperature performance test:

Randomly draw each 5 in the sample of different size,, shelve 0.5h, use different current discharges again, average discharge time and capacity following (seeing Table 1) at 20 ℃ ± 5 ℃ current charges 11h with 0.1C

The performance test of table 1 normal temperature

Test event	20Ah		60Ah		100Ah		250Ah		500Ah
	20Ah		60Ah		100Ah		250Ah		500Ah		min	Ah	min	Ah	min	Ah	min	Ah	min	Ah
	0.2C put to 1.0V	321	21.4	317	63.4	322	107.3	318	265.0	320	min	Ah	min	Ah	min	Ah	min	Ah	min	Ah	533.3
1C is put to 0.9V	0.2C put to 1.0V	321	21.4	317	63.4	322	107.3	318	265.0	320	58.2	19.4	58	55.7	57.2	95.3	57.8	240.8	57.6	480.0	533.3
1C is put to 0.9V	2C is put to 0.9V	28.1	18.7	26.5	53.0	28.3	94.4	27.6	230.0	27.4	58.2	19.4	58	55.7	57.2	95.3	57.8	240.8	57.6	480.0	456.7
5C is put to 0.8V	2C is put to 0.9V	28.1	18.7	26.5	53.0	28.3	94.4	27.6	230.0	27.4	8.1	13.5	8.2	41.2	8.0	66.7	7.9	164.6	8.1	337.5	456.7

(2) superhigh temperature performance test:

Each 2 in the sample of extraction different size at 20 ℃ ± 5 ℃ current charges 11h with 0.1C, is placed on the varying environment temperature conditions, places different time, uses different current discharges again, average discharge time following (seeing Table 2)

The average discharge time unit of table 2 superhigh temperature performance test: min

Ambient temperature (℃)	Standing time (h)	Discharging current (A)	20Ah	60Ah	100Ah	250Ah	500Ah
Ambient temperature (℃)	Standing time (h)	Discharging current (A)	20Ah	60Ah	100Ah	250Ah	500Ah	60	48	0.2C	198	195	195	197	196
70	6	0.2C	244	240	242	243	241	60	48	0.2C	198	195	195	197	196
70	6	0.2C	244	240	242	243	241	80	5	0.2C	227	224	223	225	226

(3) life test

Extract the sample of different size, under 20 ℃ ± 5 ℃ environmental conditions, adopt different charging/discharging thereofs, carry out life test, the life test situation sees Table 3

Table 3 life test statistics

Specification	Charging/discharging thereof	Testing standard	Sample number	Test result
Specification	Charging/discharging thereof	Testing standard	Sample number	Test result	15Ah	0.1C fill 11h, stop 0.5h, 0.2C is put to 1.0V	Greater than 75% of rated capacity	2	1#658 time 2#675 time
20Ah	Fill 1h 0.5C fill 2h+0.1C, stop 0.5h, 1C is put to 0.9V	Greater than 70% of rated capacity	2	1#547 time 2#522 time	15Ah	0.1C fill 11h, stop 0.5h, 0.2C is put to 1.0V	Greater than 75% of rated capacity	2	1#658 time 2#675 time
20Ah	Fill 1h 0.5C fill 2h+0.1C, stop 0.5h, 1C is put to 0.9V	Greater than 70% of rated capacity	2	1#547 time 2#522 time	60Ah	1/3C fills 3h+0.1C and fills 1h, and 1/3C is put to 1.0V	Greater than 75% of rated capacity	1	468 times also underway

Annotate: 60Ah proceeds to 468 capacity and also has 49.5Ah, is 82.5% of rated capacity

Claims

1. a ultra-high temperature alkali secondary Ni-MH battery and make new method, it is characterized in that: the big molecule fluoride inhibitor of an amount of adding in cell positive material, the an amount of metal carbonyl oxide that adds in negative material, in electrolyte, add stabilizer, battery case adopts ABS polymer-modified, and concrete grammar is as follows:

A. the making of positive plate

In the making of positive plate, press Ni (OH) ₂68～92%, additive 1～4%, inhibitor 2～8%, the weight ratio of adhesive 5～20% is put into batch mixer and is mixed and make paste, paste is coated on the conducting base again, rolls, cuts into required size after the drying, and soldering polar ear;

B. the making of negative plate

In the making of negative plate, press hydrogen storing alloy powder 70～92%, additive 1～4%, metal carbonyl oxide 2～8%, the weight ratio of adhesive 5～18% is put into batch mixer and is mixed and make paste, paste is coated on the conducting base again, rolls after the drying, cut into required physical dimension, and soldering polar ear;

C. the making of shell, lid

Press the weight ratio of ABS 60～80%, PVC 20～40%, as injection moulding battery case, lid raw material, with injection molding machine and injection mould processing battery case, lid, this battery case, lid weatherability are strong after the dry mixed, good mechanical property, and the anti-aging time is long;

D. the preparation of electrolyte

In the electrolyte of 6N KOH and 0.5NLiOH and deionized water preparation d=1.2～1.3g/ml, add M stabilizer 0.5～2%, more than the mixed dissolution cooling 24h;

E. the making of battery utmost point group

Press the sheet number of desired volume, the positive and negative plate of getting ready is separated with homemade insulating paper, the stack back is connected to lug on the pole, reinstalls in the shell;

F. inject electrolyte

The electrolyte that the prepares amount by 2～6ml/Ah is added in the battery shell one by one;

G. battery seal

With battery cover with the special bonding agent bonding or seam on battery case.