CN109596994A - Aqueous electrolysis liquid system battery discharge saves capacity test method - Google Patents
Aqueous electrolysis liquid system battery discharge saves capacity test method Download PDFInfo
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- CN109596994A CN109596994A CN201811430402.XA CN201811430402A CN109596994A CN 109596994 A CN109596994 A CN 109596994A CN 201811430402 A CN201811430402 A CN 201811430402A CN 109596994 A CN109596994 A CN 109596994A
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Abstract
The present invention provides a kind of aqueous electrolysis liquid system battery discharges to save capacity test method, take the battery after the completion of activation, it is open in battery top, it is put into calomel electrode in battery and injects electrolyte, by calomel electrode respectively with anode, battery cathode is connected, use certain discharge current I to battery constant-current discharge to battery cathode voltage for 0~0.5V, the cell voltage in battery discharge procedure is recorded at regular intervals, positive terminal voltage and negative pole end voltage, to record the time as X-axis, voltage draws battery in the same figure as ordinate, positive terminal and negative pole end voltage versus time curve, the time changing curve that positive terminal voltage is found out in figure is in the corresponding time t1 of starting point of gentle straight line, the time changing curve of negative pole end voltage and the time changing curve of cell voltage are found out in figure Intersect the corresponding time t2 of crunode, is finally calculated by formula to obtain electric discharge preservation capacity CLeave with.The method of the present invention is easy to operate, and data accuracy is higher.
Description
Technical field
The present invention relates to a kind of aqueous electrolysis liquid system battery discharges to save capacity test method.
Background technique
Aqueous electrolysis liquid system battery pack includes the batteries such as ni-mh, ni-Cd, nickel zinc, and during battery design, cathode holds
Amount is slightly excessive, and the part of the extra positive electrode capacity of cathode saves capacity by electric discharge and charging preservation capacity two parts form, battery
Capacity is determined by anode；It is the irreversible capacity generated in battery charging process, charging preservation capacity=negative that electric discharge, which saves capacity,
Pole design capacity-cathode design capacity-electric discharge saves capacity；Wherein electric discharge saves the low temp power characteristic phase of capacity and battery
It closes, electric discharge preservation capacity is bigger, and the power characteristic in a low temperature of battery is better；Charging saves the cycle life phase of capacity and battery
It closes, charging preservation capacity is fewer, in battery charging and discharging cyclic process, there is the risk overcharged, generates a large amount of hydrogen, lead to electricity
Pond internal pressure is larger, there is the risk of leakage.And discharge save capacity and anode formula, assembly after battery shelve time and temperature,
Chemical conversion scheme etc. has bigger relationship, and the preservation capacity that charges is also related to electric discharge preservation capacity.Therefore, more and more
Technical staff saves capacity by electric discharge to verify the feasibility of design scheme, and how to calculate electric discharge preservation capacity also just becomes
One project urgently to be solved.
Summary of the invention
The present invention is intended to provide a kind of easy to operate, higher aqueous electrolysis liquid system battery discharge of data accuracy saves
Capacity test method.
The present invention is realized by the following scheme:
A kind of aqueous electrolysis liquid system battery discharge preservation capacity test method, takes the battery after the completion of activation, in battery
Top opening, by the liquid socket part position insertion battery of calomel electrode, the injection electrolyte in battery is until electrolyte submerges calomel
Calomel electrode is connected with anode, battery cathode by the liquid socket part position of electrode respectively, uses certain discharge current I later
It is 0~0.5V to battery constant-current discharge to battery cathode voltage, records the battery electricity in battery discharge procedure at regular intervals
Pressure, positive terminal voltage and negative pole end voltage, drawn in the same figure as ordinate using to record the time as X-axis, voltage battery,
Positive terminal and negative pole end voltage versus time curve find out the time changing curve of positive terminal voltage in gentle straight in figure
The corresponding time t1 of the starting point of line, finds out the time changing curve of negative pole end voltage and the time change of cell voltage in figure
The corresponding time t2 of curve intersection crunode finally presses formula CLeave with=I × (t2-t1) is calculated electric discharge and saves capacity CLeave with.This
In invention, battery after the completion of activating, that is, again through being melted into the battery of charge and discharge after certain temperature and time aging after having assembled.
Further, the discharge current I is 0.2~1C.
Further, cell voltage, anode voltage and the battery cathode voltage in the record battery discharge procedure
Interval time be 0.1~5s.
Under normal circumstances, the cell voltage, anode voltage and battery cathode voltage pass through voltage acquisition instrument and adopt
Collection.For calomel electrode as reference electrode, anode voltage is the voltage of the opposite calomel electrode of anode, and battery cathode voltage is negative
Extremely with respect to the voltage of calomel electrode.Voltage acquisition instrument respectively with positive and negative extreme, the anode and calomel electricity that are connected of battery
The both ends of pole, the battery cathode being connected and calomel electrode both ends.
Aqueous electrolysis liquid system battery discharge of the invention saves capacity test method, easy to operate, data accuracy compared with
Height tests obtained electric discharge and saves the Basis that capacity saves capacity as charging, can save capacity according to electric discharge later
The low temperature power producing characteristics for inferring battery save capacity according to charging and infer battery cycle life, and the electric discharge calculated, which saves, to be held
Amount can more precisely verify the design effect of various design schemes, provide guidance for technical staff's determination or modification design scheme
Property data foundation, can shorten the R&D cycle.
Detailed description of the invention
Fig. 1 is battery, positive terminal and the negative pole end voltage versus time curve figure in embodiment 1.
Specific embodiment
The invention will be further described with reference to embodiments, but the invention is not limited to the statements of embodiment.
Embodiment 1
A kind of aqueous electrolysis liquid system battery discharge preservation capacity test method, takes the battery after the completion of activation, in battery
Top opening, by the liquid socket part position insertion battery of calomel electrode, the injection electrolyte in battery is until electrolyte submerges calomel
Calomel electrode is connected with anode, battery cathode by the liquid socket part position of electrode respectively, uses the electric discharge of 0.2~1C later
Electric current I is 0~0.5V to battery constant-current discharge to battery cathode voltage, the electricity in 0.1~5s record battery discharge procedure
Cell voltage, positive terminal voltage and negative pole end voltage, cell voltage, positive terminal voltage and negative pole end voltage pass through voltage acquisition instrument
Acquisition, drawn in the same figure as ordinate using to record the time as X-axis, voltage battery, positive terminal and negative pole end voltage with
The change curve of time, the time changing curve that positive terminal voltage is found out in figure is in the starting point corresponding time of gentle straight line
T1, the time changing curve that negative pole end voltage is found out in figure intersect with the time changing curve of cell voltage crunode it is corresponding when
Between t2, finally press formula CLeave with=I × (t2-t1) is calculated electric discharge and saves capacity CLeave with。
For example, battery is certain ni-mh D type battery that completion is made and activated by certain design technology, as required by calomel electricity
It after pole is placed and connected, uses the discharge current I of 0.2C to battery constant-current discharge to battery cathode voltage for 0V, remembers every 1s
Cell voltage, anode voltage and the battery cathode voltage in battery discharge procedure are recorded, cell voltage, anode electricity are drawn
The time changing curve of pressure and battery cathode voltage, as shown in Figure 1, wherein "-" indicates the time changing curve of cell voltage,
" -- " indicates the time changing curve of anode voltage, and " ... " indicates the time changing curve of battery cathode voltage, from Fig. 1
In find out t1 be 608s, t2 8514s, by data substitute into formula CLeave with=I × (t2-t1) is calculated electric discharge and saves capacity
CLeave withFor 2.64Ah.
Claims (4)
1. a kind of aqueous electrolysis liquid system battery discharge saves capacity test method, it is characterised in that: take the electricity after the completion of activation
Pond is open in battery top, and by the liquid socket part position insertion battery of calomel electrode, injection electrolyte is until electrolyte in battery
The liquid socket part position for submerging calomel electrode, calomel electrode is connected with anode, battery cathode respectively, uses centainly put later
Electric current I is 0~0.5V to battery constant-current discharge to battery cathode voltage, is recorded in battery discharge procedure at regular intervals
Cell voltage, positive terminal voltage and negative pole end voltage are drawn in the same figure as X-axis, voltage as ordinate using recording the time
Battery, positive terminal and negative pole end voltage versus time curve processed, find out the time changing curve of positive terminal voltage in figure
In the corresponding time t1 of the starting point of gentle straight line, the time changing curve and cell voltage of negative pole end voltage are found out in figure
Time changing curve intersects the corresponding time t2 of crunode, finally presses formula CLeave with=I × (t2-t1), which is calculated electric discharge and saves, to be held
Measure CLeave with。
2. aqueous electrolysis liquid system battery discharge as described in claim 1 saves capacity test method, it is characterised in that: described
Discharge current I is 0.2~1C.
3. aqueous electrolysis liquid system battery discharge as described in claim 1 saves capacity test method, it is characterised in that: described
The interval time for recording the cell voltage in battery discharge procedure, anode voltage and battery cathode voltage is 0.1~5s.
4. the aqueous electrolysis liquid system battery discharge as described in claims 1 to 3 is any saves capacity test method, feature exists
In: the cell voltage, anode voltage and battery cathode voltage pass through voltage acquisition instrument and acquire.
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| CN201811430402.XA CN109596994B (en) | 2018-11-28 | 2018-11-28 | Method for testing discharge storage capacity of battery with aqueous electrolyte system |
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| CN201811430402.XA CN109596994B (en) | 2018-11-28 | 2018-11-28 | Method for testing discharge storage capacity of battery with aqueous electrolyte system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253121A (en) * | 2021-07-07 | 2021-08-13 | 江苏和晖电动工具有限公司 | Battery monitoring method, monitoring system and electric tool |
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Effective date of registration: 20210722 Address after: 410100 first floor, building 10, advanced energy storage and energy conservation demonstration Industrial Park, No. 169, Section 2, Renmin East Road, Changsha Economic and Technological Development Zone, Hunan Province Patentee after: NATIONAL ENGINEERING RESEARCH OF ADVANCED ENERGY STORAGE MATERIALS Address before: 410205 No. 348, west slope, Tongzi high tech Development Zone, Hunan, Changsha Patentee before: HUNAN COPOWER EV BATTERY Co.,Ltd. |
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