CN102122718B - Annular lithium and manganese battery special for external tire pressure monitoring system, and preparation method thereof - Google Patents

Abstract

The invention provides a preparation method of an annular lithium and manganese battery special for an external tire pressure monitoring system. The method sequentially comprises the following steps of: 1, preparing materials of an anode carbon ring; 2, manufacturing the anode carbon ring; 3, preparing components; 4, assembling a battery; and 5, processing a finished product. The invention also discloses a structure of the annular lithium and manganese battery special for the external tire pressure monitoring system, which is prepared by the preparation method simultaneously. The shortcoming that most of the batteries adopted by the conventional external tire pressure monitoring system are cylindrical or button-type is solved effectively, the centrifugal force is reduced effectively, the life of automobile components is prolonged, and the running safety of the automobile is increased. The various performances of the special annular lithium and manganese battery are better than those of the national standard, and the annular lithium and manganese battery can be used safely and reliably.

Description

Special annular lithium-manganese cell for external tire pressure monitoring system and preparation method thereof

Technical field

The present invention relates to a kind of Special annular lithium-manganese cell for external tire pressure monitoring system, the invention still further relates to the preparation method of this annular lithium-manganese cell.

Background technology

Be to avoid automobile in motion because the safety problem that abnormality in tire air-pressure causes, people have manufactured and designed Tire Pressure Monitor System to compressing into the row monitoring in the automobile tire, and this system is divided into built-in and two kinds of externals at present.From concerning employed original paper performance requirement and application portability, external tire pressure monitoring system has more advantage.Existing external tire-pressure monitoring installation of sensors is on the valve cock of automobile tire, automobile tire is when High Rotation Speed, the transducer that is installed on the valve cock can produce centrifugal force, and the height of transducer is higher, and volume is larger, and its centrifugal force that produces is just larger, this centrifugal force can affect automobile balance in motion, if do not regulate, it not only can accelerate the wearing and tearing of auto parts, also may affect the fail safe of automobile when serious.For reducing this centrifugal force, must reduce as much as possible the height of tire pressure monitoring sensor.Because the battery that existing external tyre pressure transducer adopts is cylindrical or button cell, the height of battery has determined the whole height of transducer to a great extent, if battery can not take height and be installed in sensor internal, can effectively reduce centrifugal force.

Existing lithium-manganese cell manufacture craft can only be made battery the solid shape that profile is cylinder or cuboid, can't satisfy this specification requirement of external tire pressure monitoring system, therefore the preparation method who invents a kind of Special annular lithium-manganese cell for external tire pressure monitoring system, and invent a kind of tire pressure monitoring system Special annular lithium-manganese cell according to the method and become a urgent and important job.

Summary of the invention

The first purpose of the present invention is to overcome the weak point of above-mentioned existing background technology, and a kind of preparation method of Special annular lithium-manganese cell for external tire pressure monitoring system is provided.

Another object of the present invention is to provide a kind of a kind of Special annular lithium-manganese cell for external tire pressure monitoring system according to the method preparation.

The objective of the invention is to reach by following measure: the preparation method of tire pressure monitoring system Special annular lithium-manganese cell, it in turn includes the following steps:

1. go on foot the batching of anodal carbon ring: be 60% the polyflon aqueous solution, deionized water and absolute ethyl alcohol with solid content according to volume ratio be that 25%: 35%: 40% ratio mixes stand-by; Be that 92%: 3%: 5% ratio stirs into the powder that mixes by weight with electrolytic manganese dioxide, graphite and carbon black, stand-by mixed liquor is joined in the powder, add rear continuation stir about 1 hour, the positive pole material that will become reconciled is again poured bucket into;

2. go on foot the making of anodal carbon ring: the positive pole material that will prepare is made the granule that diameter is no more than 2mm, the anodal particle of moulding was smoked under 250 ℃ 2 to 3 hours, anodal particle is manufactured carbon ring, will under 200 ℃, toast 20 hours in the vacuum drying oven of carbon ring in being placed on hothouse of moulding;

3. go on foot the preparation of part: with punch press and mould the insulating trip of polyflon material is die-cut into annular with two apertures, make an aperture on the insulating trip pass the negative terminal that covers the group back side, the liquid injection hole of another one aperture cover alignment group, allow insulating trip be fixed on and cover the group back side, place 70 ℃ baking oven to toast 4 hours annular battery shell, the lid group of putting on insulating trip and sealing steel ball;

4. the go on foot the assembling of battery: the battery case that drying is good, lid group, sealing steel ball, anodal carbon ring and lithium band, barrier film change in the control box that relative humidity is not higher than 3%RH stand-by, and anodal carbon ring is kept flat into battery case; The battery case of putting anodal carbon ring well is put in the locating module of barrier film and lithium band, barrier film and lithium band are die-cut into annular and throw into together in the battery case; Take off the battery case of putting into positive pole, barrier film and lithium band, the lid group of putting on insulating trip of drying is combined on the battery case and compresses towards the mode in the shell with insulating trip; With bonding machine the junction of battery and lid group is welded; In the good cell body of welding, inject electrolyte by the liquid injection hole on the lid group with filling machine; To seal steel ball and compress into liquid injection hole fully to finish cell sealing; Battery to good seal cleans, and battery is put into the warehouse again and is stored aging;

5. the go on foot finished product processing: take out and store overdue battery and carry out voltage, visual examination; With plastic insulation spare on each qualified battery case, and allow the negative pole pole pass aperture on the insulating part; The negative pole becket is enclosed within on the negative terminal by the aperture on the ring, and itself and plastic insulation ring are worked good, then complying with the indenture bending negative pole pole on the negative pole ring, make pole just imbed indenture; With reserve energy spot welding machine that negative pole pole and the negative pole circling point of bending is welded together, finished product machines.

Tire pressure monitoring system Special annular lithium-manganese cell of the present invention, it is characterized in that it comprises a band through hole and annular battery shell, an anodal carbon ring of annular is arranged at the bottom in the annular battery shell, negative pole lithium sheet is arranged above the anodal carbon ring of annular, barrier film is arranged between negative pole lithium sheet and annular anodal carbon ring, above negative pole lithium sheet, insulating trip is arranged, have the group covered to be positioned at the top of insulating trip and seal annular battery case, the plastic insulation ring is arranged above the lid group; There is the lower end of negative terminal to be positioned at negative pole lithium sheet, and passes successively insulating trip, plastic insulation ring and negative pole becket.

In technique scheme, it is characterized in that negative pole metal indenture is arranged on the described negative pole becket, negative terminal is fold-type and is positioned at negative pole metal indenture, and negative pole becket aperture is arranged in the negative pole metal indenture, and the negative pole becket is positioned at the plastic insulation ring.

In technique scheme, plastic insulation ring indenture is arranged on the described plastic insulation ring, plastic insulation ring aperture is arranged in the plastic insulation ring indenture, and described negative pole metal indenture is positioned at plastic insulation ring indenture, described negative pole becket aperture and the corresponding layout of plastic insulation ring aperture.

In technique scheme, negative terminal aperture and insulating trip fluid injection aperture are arranged on the described insulating trip, cover the corresponding layout of group liquid injection hole on the described lid group and seal perforate by the sealing steel ball.

The present invention has following advantage: 1. designed a kind of process for preparing the tire pressure monitoring system Special annular lithium-manganese cell, and according to said method produced the tire pressure monitoring system Special annular lithium-manganese cell.2., effectively to have solved battery that existing external tyre pressure transducer adopts be cylindrical or button cell takies the shortcoming of higher height, effectively reduced centrifugal force.3. prolong the life-span of auto parts, increased the fail safe of running car.4. the properties of Special annular lithium-manganese cell of the present invention all is better than national standard, uses safety, reliable.

Description of drawings

Fig. 1 is the shape assumption diagram of anodal carbon ring among the present invention.

Fig. 2 is the shape assumption diagram of the insulating trip among the present invention.

Fig. 3 is the shape assumption diagram of the battery cover group among the present invention.

Fig. 4 is the shape assumption diagram of the battery case among the present invention.

Fig. 5 is lithium band among the present invention and the shape assumption diagram of barrier film.

Fig. 6 is the semi-finished product battery shape assumption diagram among the present invention.

Fig. 7 is the plastic insulation spare shape assumption diagram among the present invention.

Fig. 8 is the negative pole becket shape assumption diagram among the present invention.

Fig. 9 is the finished product battery appearance structure chart among the present invention.

Figure 10 is the finished product battery sectional structure chart among the present invention.

Figure 11 is the curve chart of lithium manganese annular battery constant-current discharge of the present invention.

Figure 12 is the curve chart of lithium manganese annular battery of the present invention pulsed discharge.

The trend graph of battery temperature when Figure 13 is lithium manganese annular battery short-circuit test of the present invention.

1. annular anodal carbon rings among the figure, 2. insulating trip, 21. negative terminal apertures, 22. insulating trip fluid injection apertures, 3. lid group, 31. negative terminals, 32. lid group liquid injection holes, 4. annular battery shell, 5. die-cut good lithium band and barrier film, 51. barrier films, 52. negative pole lithium sheet, 6. negative pole becket, 61. negative pole metal indentures, 62. negative pole becket aperture, 7. plastic insulation ring, 71 plastic insulation ring indentures, 72. plastic insulation ring aperture, 8. sealing steel ball, 9. through hole.

Embodiment

Describe performance of the present invention in detail below in conjunction with accompanying drawing, but they do not consist of limitation of the invention, only for example.Simultaneously by illustrating that advantage of the present invention will become more clear and easily understanding.

Special annular lithium-manganese cell for external tire pressure monitoring system preparation method of the present invention, it in turn includes the following steps:

The 1st step, anodal batching:

1. be 60% PTFE (polyflon) aqua, deionized water and absolute ethyl alcohol with solid content according to volume ratio be that 25%: 35%: 40% ratio mixes stand-by;

2. be that 92%: 3%: 5% ratio weighing is poured well mixer into and stirred into the powder that mixes by weight with electrolytic manganese dioxide, graphite and carbon black, gradation with the 1. in the step ready mixed liquor join in the powder, add rear continuation stir about 1 hour, the positive pole material that then will become reconciled is poured bucket into.

The 2nd step, anodal carbon ring are made:

The positive pole material that 1. will prepare utilizes granule-forming machine to make the granule that diameter is no more than 2mm;

2. the anodal particle of moulding was smoked under 250 ℃ 2 to 3 hours;

3. anodal particle is manufactured carbon ring (seeing accompanying drawing 1);

4. approximately 20h will be toasted in the vacuum drying oven of carbon ring in being placed on hothouse of moulding under 200 ℃.

The 3rd step, part are prepared:

1. with punch press and particular manufacturing craft the insulating trip of PTFE material is die-cut into the annular with two apertures (seeing accompanying drawing 2) of technological requirement size;

2. make an aperture of insulating trip pass the negative terminal that covers group (the seeing accompanying drawing 3) back side, the liquid injection hole of another one hole cover alignment group allows insulating trip be fixed on and covers the group back side;

3. place 70 ℃ baking oven to toast 4h annular battery shell (seeing accompanying drawing 4), the lid group of putting on insulating trip and sealing steel ball;

The 4th step, battery assembling:

1. the battery case that drying is good, lid group, sealing steel ball, anodal carbon ring and the materials such as lithium band, barrier film change in the glove box that humidity is not higher than 3%RH stand-byly, and operating personnel must wear medical rubber glove when operation;

2. with tweezers anodal carbon ring is kept flat into battery case;

3. the good barrier film of adjustment and installation and lithium band is punched into casing equipment;

4. will put the battery case of anodal carbon ring well and put in the locating module of barrier film and the die-cut package machine of lithium band, starting the machine is die-cut into barrier film and lithium band the annular (seeing accompanying drawing 5) of technological requirement size and throws into together in the battery case;

5. take off the battery case of having put into positive pole, barrier film and lithium band, the lid group of putting on insulating trip of drying is combined on the battery case towards the mode in the shell with insulating trip, and compresses with case pressing machine;

6. with laser-beam welding machine the junction of battery and lid group is welded;

7. in the good cell body of welding, inject quantitative electrolyte by the liquid injection hole on the lid group with the quantitative liquid-filling machine;

8. the battery of having annotated electrolyte seals: battery is fixed in the locating piece of Pneumatic pressing machine, gets the sealing steel ball with tweezers and put into liquid injection hole, start pressing machine steel ball is compressed into liquid injection hole fully to finish cell sealing;

9. clean with the battery of running water to good seal, then with air gun and rag the water of battery surface is removed, again battery neatly is placed in and puts the warehouse in the pallet into and store aging (the semi-finished product battery is seen accompanying drawing 6).

The 5th step, finished product processing:

1. carry out the projects such as voltage, outward appearance from the warehouse overdue battery of taking-up storage and entirely examine, entirely examining qualified battery carries out following process;

2. with plastic insulation spare (seeing accompanying drawing 7) on each qualified battery case, and allow the negative pole pole pass aperture on the insulating part;

3. negative pole becket (seeing accompanying drawing 8) is enclosed within on the negative terminal by the aperture on the ring, and itself and plastic insulation ring are worked good, then complying with the indenture bending negative pole pole on the negative pole ring, make pole just imbed indenture;

4. with reserve energy spot welding machine that negative pole pole and the negative pole circling point of bending is welded together, finished product machines (finished product battery appearance figure and sectional structure chart are seen respectively accompanying drawing 9 and accompanying drawing 10).

Tire pressure monitoring system Special annular lithium-manganese cell of the present invention, it comprises a band through hole 9 and annular battery shell 4, an anodal carbon ring 1 of annular is arranged at the bottom in annular battery shell 4, negative pole lithium sheet 52 is arranged above the anodal carbon ring 1 of annular, barrier film 51 is arranged between negative pole lithium sheet 52 and annular anodal carbon ring 1, above negative pole lithium sheet 52, insulating trip 2 is arranged, have group covered 3 to be positioned at the top of insulating trip 2 and seal annular battery case 4, plastic insulation ring 7 is arranged above lid group 3; There is the lower end of negative terminal 31 to be positioned at negative pole lithium sheet 52, and passes successively insulating trip 2, plastic insulation ring 7 and negative pole becket 6 (such as Fig. 9, shown in Figure 10).

Negative pole metal indenture 61 is arranged on the negative pole becket 6, and negative terminal 31 is fold-type and is positioned at negative pole metal indenture 61, and negative pole becket aperture 62 is arranged in the negative pole metal indenture 61, and negative pole becket 6 is positioned at plastic insulation ring 7 (such as Fig. 7, shown in Figure 8).

Plastic insulation ring indenture 71 is arranged on the plastic insulation ring 7, plastic insulation ring aperture 72 is arranged in the plastic insulation ring indenture 71, described negative pole metal indenture 61 is positioned at plastic insulation ring indenture 71, described negative pole becket aperture 62 and plastic insulation ring aperture 72 corresponding layouts (such as Fig. 7, shown in Figure 8).

Negative terminal aperture 21 and insulating trip fluid injection aperture 22 are arranged on the insulating trip 2, cover group liquid injection hole 32 corresponding layouts on the described lid group 3 and seal perforates (as shown in Figure 6) by sealing steel ball 8.

Battery testing

1, electric performance test

1. constant-current discharge ability: with battery respectively with the electric current constant-current discharge of 1mA and 100 μ A to 2.0V, discharge capacity reaches respectively 121mAh and 109mAh (discharge curve is seen accompanying drawing 11);

2. pulsed discharge ability: with battery with the 10mA electric current according to the discharge 1s, the mode that leaves standstill 1min is carried out pulsed discharge, during take 2.0V as discharge cut-off voltage, the battery impulse discharge capacity is about 83mAh (discharge curve is seen accompanying drawing 12);

The static working current of general external tire pressure monitoring system is less than 5 μ A, and the momentary pulse operating current is less than 10mA, and from Discharge test, the constant current of battery and pulsed discharge ability all can reach the requirement of system.

2, security performance test

1. high-temperature behavior: 10 batteries numberings are weighed and record data, in 60 ℃ of baking ovens, place 24h again, take out battery and observe and have or not unusually, then weigh, the calculated weight loss late, related data such as following table:

Numbering	Weight before the baking	Weight after the baking	Rate of weight loss	Whether have unusual
					1	4.3618	4.3613	0.011％	Nothing
2	4.4563	4.4567	-0.009％	Nothing
					3	4.2756	4.2751	0.012％	Nothing
4	4.3423	4.3420	0.007％	Nothing
					5	4.3278	4.3265	0.030％	Nothing
6	4.2536	4.2537	-0.002％	Nothing
					7	4.3545	4.3540	0.011％	Nothing
8	4.3756	4.3751	0.011％	Nothing
					9	4.4234	4.4227	0.016％	Nothing
10	4.2967	4.2965	0.005％	Nothing

The lithium battery mass loss maximum of GB8897.4-2008/IEC60086-4:2007 regulation is as follows:

The quality m of battery	Mass loss limit (δ m/m)/%
		m≤1g	0.5
1g＜m≤5g	0.2
		m＞5g	0.1

From test result, 60 ℃ of high temperature that battery stands 24h are deposited rear battery weight-loss ratio well below 0.2% standard value of GB8897.4-2008/IEC60086-4:2007 defined.This battery uses under normal temperature and does not more have problems so.

2. short circuit safety: the battery positive and negative electrode is directly coupled together with the wire of resistance less than 10m Ω, the probe of a Wen Yi is fixed on battery surface, regularly read the battery surface temperature data, until the battery surface temperature drops to temperature (short circuit battery temperature trend graph is seen accompanying drawing 13), related data such as following table:

GB8897.4-2008/IEC60086-4:2007 regulation lithium battery must be not overheated when short circuit (battery surface temperature＞170 ℃), do not break, do not explode, missing of ignition.

Temperature tendency from short circuit battery, battery short circuit about halfhour the time temperature reach 41 ℃ of peak values, just drop to comparatively stably subsequently room temperature, the problems such as exploding, catch fire does not appear in battery, the battery surface maximum temperature is also well below 170 ℃, superheating phenomenon do not occur, show that battery also is safe in the accidental short circuit situation.

3. impact test: battery is placed on the test platform, with one heavily approximately the weight of 9.1kg fall on the tested battery from the eminence of 61 ± 2.5cm, battery is not blasted and is had no on fire yet, the battery surface maximum temperature is 52 ℃.

Not overheated during GB8897.4-2008/IEC60086-4:2007 regulation lithium battery impact test (battery surface temperature＞170 ℃), do not explode, missing of ignition.

3. test shows that battery the time also can not cause danger at the bump that has an accident.

From test result 1., 2. and 3., battery involved in the present invention can ensure its fail safe in use fully.

Claims (1)

1. the preparation method of Special annular lithium-manganese cell for external tire pressure monitoring system, it in turn includes the following steps:

1. go on foot the batching of anodal carbon ring: the aqueous solution, deionized water and the absolute ethyl alcohol that with content are 60% polyflon are that the ratio of 25%:35%:40% mixes stand-by according to volume ratio; Electrolytic manganese dioxide, graphite and carbon black by weight for the ratio of 92%:3%:5% stirs into the powder that mixes, are joined stand-by mixed liquor in the powder, add rear continuation stir about 1 hour, the positive pole material that will become reconciled is again poured bucket into;

2. go on foot the making of anodal carbon ring: the positive pole material that will prepare is made the granule that diameter is no more than 2mm, the anodal particle of moulding was smoked under 250 ℃ 2 to 3 hours, anodal particle is manufactured carbon ring, will under 200 ℃, toast 20 hours in the vacuum drying oven of carbon ring in being placed on hothouse of moulding;

3. go on foot the preparation of part: with punch press and mould the insulating trip of polyflon material is die-cut into annular with two apertures, make an aperture on the insulating trip pass the negative terminal that covers the group back side, the liquid injection hole of another one aperture cover alignment group, allow insulating trip be fixed on and cover the group back side, place 70 ℃ baking oven to toast 4 hours annular battery shell, the lid group of putting on insulating trip and sealing steel ball;

4. the go on foot the assembling of battery: the battery case that drying is good, lid group, sealing steel ball, anodal carbon ring and lithium band, barrier film change in the control box that relative humidity is not higher than 3%RH stand-by, and anodal carbon ring is kept flat into battery case; The battery case of putting anodal carbon ring well is put in the locating module of barrier film and lithium band, barrier film and lithium band are die-cut into annular and throw into together in the battery case; Take off the battery case of putting into positive pole, barrier film and lithium band, the lid group of putting on insulating trip of drying is combined on the battery case and compresses towards the mode in the shell with insulating trip; With bonding machine the junction of battery and lid group is welded; In the good cell body of welding, inject electrolyte by the liquid injection hole on the lid group with filling machine; To seal steel ball and compress into liquid injection hole fully to finish cell sealing; Battery to good seal cleans, and battery is put into the warehouse again and is stored aging;

5. the go on foot finished product processing: take out and store overdue battery and carry out voltage, visual examination; With plastic insulation spare on each qualified battery case, and allow the negative pole pole pass aperture on the insulating part; The negative pole becket is enclosed within on the negative terminal by the aperture on the ring, and itself and plastic insulation ring are worked good, then complying with the indenture bending negative pole pole on the negative pole ring, make pole just imbed indenture; With reserve energy spot welding machine that negative pole pole and the negative pole circling point of bending is welded together, finished product machines.

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