CN102706507A - System for measuring internal pressure of battery on line - Google Patents
System for measuring internal pressure of battery on line Download PDFInfo
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- CN102706507A CN102706507A CN2012101780694A CN201210178069A CN102706507A CN 102706507 A CN102706507 A CN 102706507A CN 2012101780694 A CN2012101780694 A CN 2012101780694A CN 201210178069 A CN201210178069 A CN 201210178069A CN 102706507 A CN102706507 A CN 102706507A
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Abstract
The invention discloses a system for measuring the internal pressure of a battery on line and relates to battery parameter measuring equipment. The system comprises a battery clamp, a battery head clamp, a battery anode screw, a dial indicator, a dial indicator fixing screw and a battery fixing screw, wherein the battery clamp is used for accommodating a measured battery; the battery anode screw is fixed at a central port of the battery head clamp and pressed against a battery anode safety cap; an insulating layer is arranged between the battery anode screw and the battery head clamp; the dial indicator is inserted into the battery clamp and contacted with the bottom of the measured battery; the dial indicator fixing screw penetrates through the battery clamp and fixes the dial indicator; and the battery anode screw and the battery fixing screw respectively serve as an anode and a cathode of the battery. The internal pressure which is measured can exceed the safety pressure of the battery and can reach the balanced pressure of the battery. The battery is firm and high in bearing capacity, during pressure-deformation curve measurement, gas pressure can reach 4.5 MPa, and measurement requirements for the internal pressure which is greater than the safety pressure are met.
Description
Technical field
The present invention relates to a kind of battery parameter measuring equipment, especially relate to a kind of inner pressure of battery on-line measurement system.
Background technology
Ni-MH battery in use, under situation about overcharging, negative pole has H
2Produce the anodal O that produces
2, because the generation of these gases increases the pressure of inside battery.This pressure adds up along with the duration of charging gradually, because the hydrogen bearing alloy of negative pole plays catalytic action to hydrogen and oxygen synthetic water, so the interior pressure of battery finally reaches certain equilibrium value.If this equalized pressure is greater than cell safety pressure, battery will leak gas so, even leakage, damages consumer, and the electrolytic solution of inside battery is reduced, and internal resistance increases, and capacity and life-span reduce.
Because the quality of hydrogen bearing alloy performance has determined the equilibrium pressure height of inside battery, and the factor of decision internal pressure of NiH battery is a hydrogen bearing alloy, so the mensuration of inner pressure of battery is significant to the performance study of hydrogen bearing alloy.
Opening method and deformation method are generally adopted in the test of inner pressure of battery.
The opening method is open cell to be put in one be equipped with in the closed container of pressure transducer and discharge and recharge, and the pressure that produces in the charge and discharge process is reflected by pressure transducer.Owing to except battery, also have other remaining space in the closed container, therefore can't reflect true interior pressure of battery.The true inner pressure of battery of measuring should adopt the deformation method.
The principle of work that the deformation method is measured inner pressure of battery is: certain interval in the strain that produces because of internal gas pressure of battery container, with suffered in height relevant of pressure, and exist definite relation; Through testing the relation curve that can measure battery case strain and interior pressure, adopt accurate miniature deformation survey instrument, can accurately measure battery container and find inner pressure of battery at the miniature deformation under the interior pressure effect and then on deformation-pressure dependence curve.
Chinese patent CN1068190 discloses a kind of measuring method of internal pressure of sealed cylinderical battery, mainly is to utilize resistance strain gage, measures battery case owing to inner pressure of battery changes the microstrain amount that causes, calculates the inner pressure of battery value.This invention is measured and is compared with the tensimeter method, has not only kept the original structure and the integrality of cylindrical sealed battery, changed destructive measuring method in the prior art, and the force value of being surveyed can reflect the interior pressure of practical columnar sealed cell.
Summary of the invention
The object of the present invention is to provide a kind of inner pressure of battery on-line measurement system.
The present invention is provided with battery clamp, battery fixture head, anode screw, dial gauge, dial gauge gib screw and battery gib screw.The tested battery that is used to pack in the said battery clamp, said anode screw retention is at the hub-interface of battery fixture head and withstand the anode safety helmet, is provided with insulation course between anode screw and the battery fixture head; Said dial gauge inserts in the battery clamp and with the bottom of tested battery and contacts, and the dial gauge gib screw penetrates battery clamp dial gauge is fixed; Anode screw and battery gib screw are respectively as the positive pole and the negative pole of battery.
With conventional battery internal pressure measurement apparatus in comparison, the present invention has the following advantages:
1) withstand on the anode safety helmet with the anode screw, safety helmet can not opened because interior pressure surpasses its safe pressure.Because battery clamp tightly encases battery, inner pressure of battery can only make battery steel shell bottom deformation.Therefore, the interior pressure value of mensuration can surpass the safe pressure of battery, reaches the equalized pressure of battery.
2) the battery fixture head adopts nut to be spun on the battery clamp; Make battery clamp and battery fixture head form an integral body, battery is tightly encased by battery clamp and battery fixture head, and is so more firm; Holding capacity is big; Carrying out pressure-inflection curves when measuring, gaseous tension can reach 4.5MPa (45 atmospheric pressure), satisfies that to measure the above interior pressure of safe pressure required.
Description of drawings
Fig. 1 is that the structure of the embodiment of the invention is formed synoptic diagram.
Structure when Fig. 2 measures for carry out deformation-pressure curve with empty box hat is formed synoptic diagram.
Fig. 3 is the deformation-pressure curve measurement result of box hat.In Fig. 3, horizontal ordinate is deformation (mm/100), and ordinate is interior pressure (atm)
Fig. 4 is inner pressure of battery measurement result (safe pressure of battery safety valve is 30atm, and the final equalized pressure of inner pressure of battery is 36.6atm).In Fig. 4, horizontal ordinate is duration of charging (min), and ordinate is interior pressure (atm).
Embodiment
Following examples will combine accompanying drawing that the present invention is further described.
Referring to Fig. 1 and 2, the embodiment of the invention is provided with battery clamp 1, battery fixture head 2, anode screw 3, dial gauge 4, dial gauge gib screw 5 and battery gib screw 6.The tested battery A that is used to pack in the said battery clamp 1, said anode screw 3 is fixed on the hub-interface of battery fixture head 2 and withstands anode safety helmet 9, is provided with insulation course 7 between anode screw 3 and the battery fixture head 2; Said dial gauge 4 inserts in the battery clamp 1 and with the bottom of tested battery A and contacts, and it is fixing with dial gauge 4 that dial gauge gib screw 5 penetrates battery clamp 1; Anode screw 3 and battery gib screw 6 are respectively as the positive pole and the negative pole of battery.
When carrying out deformation-pressure curve and measure, change battery into battery empty box hat B, the anode screw changes pipe adapter 8 into, and pipe adapter 8 can connect gases at high pressure, and empty box hat B is filled high pressure.
The present invention adopts stainless steel to make, and battery (battery steel shell) is put into the internal pressure measurement device, and a width is arranged at battery (battery steel shell) bottom is the tube support of the annular end of 1mm, and making battery (battery steel shell) bottom that diameter arranged is the free deformation space of 12mm; The battery top compresses with the battery fixture head that has hold-down nut, and there is the anode screw at battery fixture head center, insulate between anodal screw and the hold-down nut, and anode is held out against by anodal screw, and the anode safety valve can't be opened.Therefore, the inner pressure of battery of the present invention's measurement can reach 45 above atmospheric pressure.
The present invention can measure the equalized pressure of inside battery, and concrete grammar is following:
1) measurement of deformation-pressure curve: battery steel shell is positioned over (see figure 2) in the battery clamp; Utilize gases at high pressure that battery case is inflated; Pressure in the battery case is constantly increased, with the miniature deformation of dial gauge measurement battery case bottom, pressure measurement range 0～4.5MPa; Each force value should have a deformation quantity mutually, draws deformation-pressure orign and schemes (see figure 3).
Visible by Fig. 3; Deformation when deformation quantity is less than 0.135mm (press in corresponding and be 20atm) bottom the battery steel shell is to belong to elastic deformation; Plastic deformation has just taken place after surpassing 0.135mm in deformation quantity; There are not definite linear relationship in pressure and deformation in the measuring process of inside battery equalized pressure, and therefore, internal pressure measurement utilizes pressure-deformation orign figure to find the corresponding inner pressure of battery of deformation quantity ε.
2) battery is positioned in the inner pressure of battery measurement mechanism (see figure 1), holds out against battery safety valve with anodal screw.The positive pole of charging equipment connects anodal screw, and the negative pole of charging equipment connects battery gib screw (safety helmet of battery is that box hat anodal, battery is a negative pole), and battery is carried out overcharge.
3) through measuring the miniature deformation ε of battery battery bottom under overcharge conditions, find the corresponding inner pressure of battery of ε from pressure-deformation orign chart (Fig. 3).
Fig. 4 is the inner pressure of battery measurement result.Visible by Fig. 4, inner pressure of battery can not opened above safety valve under the situation of safety valve safe pressure yet.Therefore the inner pressure of battery of measuring can reach its equalized pressure.
Claims (1)
1. the inner pressure of battery on-line measurement system is characterized in that being provided with battery clamp, battery fixture head, anode screw, dial gauge, dial gauge gib screw and battery gib screw; The tested battery that is used to pack in the said battery clamp, said anode screw retention is at the hub-interface of battery fixture head and withstand the anode safety helmet, is provided with insulation course between anode screw and the battery fixture head; Said dial gauge inserts in the battery clamp and with the bottom of tested battery and contacts, and the dial gauge gib screw penetrates battery clamp dial gauge is fixed; Anode screw and battery gib screw are respectively as the positive pole and the negative pole of battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101780694A CN102706507A (en) | 2012-05-31 | 2012-05-31 | System for measuring internal pressure of battery on line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101780694A CN102706507A (en) | 2012-05-31 | 2012-05-31 | System for measuring internal pressure of battery on line |
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| CN102706507A true CN102706507A (en) | 2012-10-03 |
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| CN2012101780694A Pending CN102706507A (en) | 2012-05-31 | 2012-05-31 | System for measuring internal pressure of battery on line |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296911A (en) * | 2014-01-17 | 2015-01-21 | 中航锂电（洛阳）有限公司 | Lithium ion battery core stress measurement method and device |
| CN109738805A (en) * | 2018-12-29 | 2019-05-10 | 蜂巢能源科技有限公司 | Battery and its test method, device, electronic equipment |
| CN110470424A (en) * | 2019-07-25 | 2019-11-19 | 清华大学 | The experimental method of in situ measurement inside battery pressure |
| CN110864758A (en) * | 2019-11-12 | 2020-03-06 | 桐乡乐维新材料有限公司 | Device and method for detecting gas production rate in graphene battery |
| CN112945452A (en) * | 2021-03-31 | 2021-06-11 | 蜂巢能源科技有限公司 | Cell air pressure testing device and cell air pressure testing method |
Citations (5)
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|---|---|---|---|---|
| CN2315557Y (en) * | 1997-10-09 | 1999-04-21 | 天津大学 | Inner pressure measurer for nickel-hydrogen battery |
| CN2408449Y (en) * | 1999-10-14 | 2000-11-29 | 上海交通大学 | Inner pressure tester for general cell |
| JP2009152071A (en) * | 2007-12-20 | 2009-07-09 | Ntt Facilities Inc | Battery monitor, sealed battery, and sealed battery pack |
| CN102324588A (en) * | 2011-06-03 | 2012-01-18 | 江西长河新电池有限公司 | Equipment for detecting pressure inside cylindrical lithium ion battery |
| CN202676352U (en) * | 2012-05-31 | 2013-01-16 | 厦门钨业股份有限公司 | Cell internal pressure on-line measuring system |
-
2012
- 2012-05-31 CN CN2012101780694A patent/CN102706507A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2315557Y (en) * | 1997-10-09 | 1999-04-21 | 天津大学 | Inner pressure measurer for nickel-hydrogen battery |
| CN2408449Y (en) * | 1999-10-14 | 2000-11-29 | 上海交通大学 | Inner pressure tester for general cell |
| JP2009152071A (en) * | 2007-12-20 | 2009-07-09 | Ntt Facilities Inc | Battery monitor, sealed battery, and sealed battery pack |
| CN102324588A (en) * | 2011-06-03 | 2012-01-18 | 江西长河新电池有限公司 | Equipment for detecting pressure inside cylindrical lithium ion battery |
| CN202676352U (en) * | 2012-05-31 | 2013-01-16 | 厦门钨业股份有限公司 | Cell internal pressure on-line measuring system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296911A (en) * | 2014-01-17 | 2015-01-21 | 中航锂电（洛阳）有限公司 | Lithium ion battery core stress measurement method and device |
| CN109738805A (en) * | 2018-12-29 | 2019-05-10 | 蜂巢能源科技有限公司 | Battery and its test method, device, electronic equipment |
| CN109738805B (en) * | 2018-12-29 | 2021-02-23 | 蜂巢能源科技有限公司 | Battery, testing method and device thereof, and electronic equipment |
| CN110470424A (en) * | 2019-07-25 | 2019-11-19 | 清华大学 | The experimental method of in situ measurement inside battery pressure |
| CN110864758A (en) * | 2019-11-12 | 2020-03-06 | 桐乡乐维新材料有限公司 | Device and method for detecting gas production rate in graphene battery |
| CN110864758B (en) * | 2019-11-12 | 2020-12-18 | 桐乡乐维新材料有限公司 | Device and method for detecting gas production rate in graphene battery |
| CN112945452A (en) * | 2021-03-31 | 2021-06-11 | 蜂巢能源科技有限公司 | Cell air pressure testing device and cell air pressure testing method |
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Application publication date: 20121003 |