CN105510837A - Method for testing body heat power of lithium ion battery - Google Patents
Method for testing body heat power of lithium ion battery Download PDFInfo
- Publication number
- CN105510837A CN105510837A CN201510922439.4A CN201510922439A CN105510837A CN 105510837 A CN105510837 A CN 105510837A CN 201510922439 A CN201510922439 A CN 201510922439A CN 105510837 A CN105510837 A CN 105510837A
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- Prior art keywords
- battery
- lithium ion
- ion battery
- discharge
- heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a method for testing heat power of a lithium ion battery itself when the lithium ion battery works. The method comprises the following steps: installing an aluminum pipe with a heat conduction function on the outer wall of a test battery, and letting a condensing agent with a constant temperature T in the aluminum pipe; charging the lithium ion battery at an empty state by constant currents I to a fully charged state, and recording energy W1 charged into the battery through a charge and discharge cabinet; discharging the lithium ion battery at the fully charged state by the constant currents I to the empty state, and recording energy W2 discharged by the battery through the charge and discharge cabinet; and changing the temperature T of the condensing agent in the aluminum pipe and the discharge currents I, and repeating the aforementioned steps for testing heat power of the battery at different temperatures. The method for testing the body heat power of the lithium ion battery during work, disclosed by the invention, can simply and reliably test the body heat power of the lithium ion battery when the lithium ion battery works under the conditions of specific temperature and specific multiplying power.
Description
Technical field
The present invention relates to lithium ion battery field of heat management, especially a kind of method of testing of testing lithium ion battery body power.
Background technology
Lithium ion battery has the incomparable advantage of other batteries a lot, such as voltage is high, specific energy is high, circulate, self discharge is little, memory-less effect, pollution-free etc., obtain swift and violent development in recent years, it relies on self premium properties to capture the market of notebook computer, mobile phone, military equipment rapidly.New-energy automobile replaces oil with battery, effectively can reduce the discharge of greenhouse gases, thus realize the object of environmental protection low-carbon (LC).
Since lithium ion battery is introduced in automotive field, electric automobile is just denounced by people because of various problem.One of them distinct issues is that lithium ion battery can produce a large amount of heats in charge and discharge process, if these heats are not reasonably controlled, gently then can affect the cycle life of power battery pack, heavy then can cause the fire of vehicle because of thermal runaway.
The heating level of lithium ion and the working temperature, working current etc. of battery closely related, the heating power of current lithium ion battery there is no more effectively, method of testing easily.Existing method of testing has differential scanning calorimetry (DSC), thermogravimetry (TG), accelerates calorimetry (ARC) etc., but these method of testing processes are loaded down with trivial details, somewhat expensive and can not ensure that the temperature of battery in test process maintains specific numerical value all the time.
The body heating power of battery is an important input parameter in the emulation of battery heat, parameters input can predict the heat condition of battery under specific operation accurately accurately, thus just can evade battery overheat condition in use at the product design initial stage.The method is implemented simple and convenient, and low testing cost is applied widely.
Summary of the invention
In view of the foregoing, the object of this invention is to provide a kind of method of testing lithium ion battery body heating power, it can be tested lithium ion battery heat condition in the course of the work easily and reliably, it implements simple, low testing cost, can obtain the heat generation parameter of battery accurately and reliably, make power brick designer accurately can learn the heat condition of battery, allowing designer design safe and reliable power brick further becomes possibility.
For achieving the above object, the technical solution adopted in the present invention is:
A method of testing for lithium ion battery body heating power, comprises the steps:
The first step: by electric for sky state battery, peripheral installation has the aluminum pipe of heat conduction function, the condensing agent of logical steady temperature T in aluminum pipe, and battery plus-negative plate is connected to charge and discharge cabinet;
Second step: the lithium ion battery of empty electric state charges to full electric state with steady current I, the energy W be filled with by discharge and recharge cabinet record battery
1;
3rd step: the lithium ion battery of full electric state is discharged to empty electric state with steady current I, the energy W released by discharge and recharge cabinet record battery
2, recording process time t;
4th step: according to default computing formula, calculates the gross calorific power Q of battery in charge and discharge process
heat.
5th step: according to the energy value W recorded during above-mentioned discharge and recharge
1, W
2and discharge time t, battery volume V calculate in charge and discharge process, the heating power p of battery
heat;
6th step: change condensing agent temperature T and charging and discharging currents I, repeats the first step to the 4th step, calculates the heating power p of the battery under different temperatures and electric current
heat.
Gross calorific power Q in described 4th step
heatcomputing formula be specially:
Described cell body heating power p
heatcomputing formula be specially:
In described 6th step, condensing agent temperature T comprises 25 DEG C, 35 DEG C, 45 DEG C, 55 DEG C, 10 DEG C, 0 DEG C ,-10 DEG C ,-20 DEG C, and charging and discharging currents multiplying power comprises 1/3C, 1/2C, 1C, 1.5C, 2C, 3C, 4C, 5C.
The invention has the beneficial effects as follows: the method that the invention discloses heating power during the work of a kind of lithium ion battery, it can test the heating power obtaining lithium ion battery and work under specified temp, particular power simple and reliablely, it implements simple, low testing cost, the heat generation parameter of battery can be obtained accurately and reliably, make power brick designer accurately can learn the heat condition of battery, allowing designer design safe and reliable power brick further becomes possibility.
Accompanying drawing explanation
Fig. 1 is experimental cell and corresponding water bath heat preservation installation drawing.
Fig. 2 is the connection diagram before mesuring battary sample and electronic load, Temperature sampler.
Fig. 3 be battery sample at normal temperature 25 DEG C, gross calorific power Q during different multiplying current work
heat.
Body heating power P when Fig. 4 is corresponding different multiplying current work
heat.
Fig. 5 be battery sample under 1C multiplying power electric current, different temperatures work time gross calorific power Q
heat.
Body heating power P when Fig. 6 is corresponding different temperatures work
heat.
1-battery in figure, 2-heat-conducting aluminium pipe, 3-both positive and negative polarity, 4-cooling liquid inlet, 5-cooling liquid outlet, 6-mesuring battary sample, 7-electronic load, 8-Temperature sampler.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
See Fig. 1, Fig. 2, the invention provides a kind of method of testing of lithium ion battery body heating power, it is worked by lithium ion battery by external heat-preserving equipment at specific temperature and multiplying power, the quantity of heat production of lithium ion point in test job process, so calculate different temperatures, body heating power under different multiplying during lithium ion battery work.The method specifically comprises the steps:
Step S101: by emptying electricity under lithium ion battery normal temperature to be measured, the aluminum pipe with heat conduction function is arranged on test battery outer wall, the condensing agent of logical steady temperature T in aluminum pipe, as shown in Figure 1;
In step S101, condensing agent temperature T comprises 25 DEG C, 35 DEG C, 45 DEG C, 55 DEG C, 10 DEG C, 0 DEG C ,-10 DEG C ,-20 DEG C;
Step S102: battery sample ready in step S101 is connected to electronic load, and cloth is set up temperature sensor on battery sample relevant position, as shown in Figure 2;
Step S103: the lithium ion battery of empty electric state charges to full electric state with steady current I, the energy W be filled with by discharge and recharge cabinet record battery
1;
Step S104: the lithium ion battery of full electric state is discharged to empty electric state with steady current I, the energy W released by discharge and recharge cabinet record battery
2, recording process time t;
In step S103 and step S104, the multiplying power of steady current I comprises 1/3C, 1/2C, 1C, 1.5C, 2C, 3C, 4C, 5C;
Step S105: according to the energy value W recorded during above-mentioned discharge and recharge
1, W
2in charge and discharge process, the heating power Q of battery
heat, as shown in Figure 3, the thermal value under 1C current ratio different temperatures as shown in Figure 5 for the result wherein worked under different current ratio at temperature 25 DEG C;
Step S106: according to the Q in step S105
heatand discharge time t, battery volume V calculate in charge and discharge process, the heating power p of battery
heat, as shown in Figure 4, as shown in Figure 6, computing formula is as follows for the thermal value under 1C current ratio different temperatures for the result wherein worked under current ratio at temperature 25 DEG C:
Gross calorific power Q
heatcomputing formula be specially:
Cell body heating power p
heatcomputing formula be specially:
It should be noted that above embodiment is just illustrated the invention.Those skilled in the art does various amendment to the present invention, only otherwise depart from intended spirit of the present invention, all at claims of the present invention.
Claims (4)
1. a method of testing for lithium ion battery body heating power, is characterized in that, described method comprises the steps:
The first step: by electric for sky state battery, peripheral installation has the aluminum pipe of heat conduction function, the condensing agent of logical steady temperature T in aluminum pipe, and battery plus-negative plate is connected to charge and discharge cabinet;
Second step: the lithium ion battery of empty electric state charges to full electric state with steady current I, the energy W be filled with by discharge and recharge cabinet record battery
1;
3rd step: the lithium ion battery of full electric state is discharged to empty electric state with steady current I, the energy W released by discharge and recharge cabinet record battery
2, recording process time t;
4th step: according to default computing formula, calculates the gross calorific power Q of battery in charge and discharge process
heat.
5th step: according to the energy value W recorded during above-mentioned discharge and recharge
1, W
2and discharge time t, battery volume V calculate in charge and discharge process, the heating power p of battery
heat;
6th step: change condensing agent temperature T and charging and discharging currents I, repeats the first step to the 4th step, calculates the heating power p of the battery under different temperatures and electric current
heat.
2. the method for testing of a kind of lithium ion battery body heating power as described in claim 1, is characterized in that, the gross calorific power Q in described 4th step
heatcomputing formula be specially:
。
3. the method for testing of a kind of lithium ion battery body heating power as described in claim 1, is characterized in that, described cell body heating power p
heatcomputing formula be specially:
。
4. the method for testing of a kind of lithium ion battery body heating power as described in claim 1, it is characterized in that, in described 6th step, condensing agent temperature T comprises 25 DEG C, 35 DEG C, 45 DEG C, 55 DEG C, 10 DEG C, 0 DEG C ,-10 DEG C ,-20 DEG C, and charging and discharging currents multiplying power comprises 1/3C, 1/2C, 1C, 1.5C, 2C, 3C, 4C, 5C.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954680A (en) * | 2016-05-03 | 2016-09-21 | 北京新能源汽车股份有限公司 | Power battery heating power test device and method |
| CN106404827A (en) * | 2016-08-24 | 2017-02-15 | 合肥国轩高科动力能源有限公司 | Detection method of specific heat capacity of power lithium battery |
| CN106768492A (en) * | 2017-01-24 | 2017-05-31 | 上海空间电源研究所 | A kind of space measuring method of battery caloric value |
| CN106980092A (en) * | 2017-04-01 | 2017-07-25 | 深圳市超思维电子股份有限公司 | The computational methods and device of battery-heating amount |
| CN107450028A (en) * | 2017-07-20 | 2017-12-08 | 合肥国轩高科动力能源有限公司 | A kind of computational methods of lithium ion battery thermal power density |
| CN108008308A (en) * | 2017-11-23 | 2018-05-08 | 芜湖天量电池***有限公司 | A kind of test system and method for lithium ion battery caloric value |
| CN108344946A (en) * | 2017-01-22 | 2018-07-31 | 中国科学院空间应用工程与技术中心 | Battery-heating weight testing method and battery-heating amount test device |
| CN109725263A (en) * | 2018-12-27 | 2019-05-07 | 中国电子科技集团公司第十八研究所 | Estimation method for high-power charging and discharging heating power of battery |
| CN109856543A (en) * | 2018-12-20 | 2019-06-07 | 合肥国轩高科动力能源有限公司 | A kind of cylindrical battery water cooling design internal-external temperature difference nature imitation experiment device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954680A (en) * | 2016-05-03 | 2016-09-21 | 北京新能源汽车股份有限公司 | Power battery heating power test device and method |
| CN105954680B (en) * | 2016-05-03 | 2019-09-03 | 北京新能源汽车股份有限公司 | The device and method of power battery heat power test |
| CN106404827A (en) * | 2016-08-24 | 2017-02-15 | 合肥国轩高科动力能源有限公司 | Detection method of specific heat capacity of power lithium battery |
| CN108344946B (en) * | 2017-01-22 | 2023-12-15 | 中国科学院空间应用工程与技术中心 | Battery heating value testing method and battery heating value testing device |
| CN108344946A (en) * | 2017-01-22 | 2018-07-31 | 中国科学院空间应用工程与技术中心 | Battery-heating weight testing method and battery-heating amount test device |
| CN106768492B (en) * | 2017-01-24 | 2019-04-12 | 上海空间电源研究所 | A kind of measurement method of space battery calorific value |
| CN106768492A (en) * | 2017-01-24 | 2017-05-31 | 上海空间电源研究所 | A kind of space measuring method of battery caloric value |
| CN106980092A (en) * | 2017-04-01 | 2017-07-25 | 深圳市超思维电子股份有限公司 | The computational methods and device of battery-heating amount |
| CN106980092B (en) * | 2017-04-01 | 2020-08-21 | 深圳市超思维电子股份有限公司 | Method and device for calculating heat productivity of battery |
| CN107450028A (en) * | 2017-07-20 | 2017-12-08 | 合肥国轩高科动力能源有限公司 | A kind of computational methods of lithium ion battery thermal power density |
| CN108008308A (en) * | 2017-11-23 | 2018-05-08 | 芜湖天量电池***有限公司 | A kind of test system and method for lithium ion battery caloric value |
| CN109856543A (en) * | 2018-12-20 | 2019-06-07 | 合肥国轩高科动力能源有限公司 | A kind of cylindrical battery water cooling design internal-external temperature difference nature imitation experiment device |
| CN109725263A (en) * | 2018-12-27 | 2019-05-07 | 中国电子科技集团公司第十八研究所 | Estimation method for high-power charging and discharging heating power of battery |
| CN109725263B (en) * | 2018-12-27 | 2022-03-22 | 中国电子科技集团公司第十八研究所 | Estimation method for high-power charging and discharging heating power of battery |
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Application publication date: 20160420 |