CN109213227A - A kind of temperature control method of Li-ion batteries piles - Google Patents
A kind of temperature control method of Li-ion batteries piles Download PDFInfo
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- CN109213227A CN109213227A CN201710515246.6A CN201710515246A CN109213227A CN 109213227 A CN109213227 A CN 109213227A CN 201710515246 A CN201710515246 A CN 201710515246A CN 109213227 A CN109213227 A CN 109213227A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The present invention provides a kind of temperature control method of Li-ion batteries piles, the battery pack includes multiple single batteries, detector, and cooling system, the detector detects the temperature of each single battery, the cooling system includes that air cooling system and liquid cooling system start air cooling system when the temperature of the single battery is higher than first threshold；When the average cell temperature of single batteries all in battery pack is higher than second threshold, start liquid cooling system；When single battery temperature is higher than first threshold, and average cell temperature is higher than second threshold, stop the work that temperature is higher than the single battery of first threshold, and start air-cooled and liquid cooling system simultaneously.Temperature control method provided by the invention formulates different refrigerating modes according to the different situation of battery pack, while guaranteeing cooling efficiency, reduces the energy consumption of cooling system.
Description
Technical field
The present invention relates to battery technology fields, more particularly to a kind of temperature control method of Li-ion batteries piles.
Background technique
With the fast development of lithium ion battery, lithium ion battery also starts largely to be answered as power, accumulation power supply
With.But lithium ion battery will affect its working performance at high temperature, can even cause fire or explosion, and electricity when serious
There is also differences for the situation of each monomer lithium ion battery in the group of pond, can have temperature unevenness during battery pack operation
The case where, it is therefore desirable to temperature-controlling system is set in battery pack.But the operation of temperature-controlling system is also required to the energy of consumption battery pack
Amount, therefore, how effectively to cool down and reduce the energy consumption of temperature-controlling system is the problem of temperature control technique in battery pack.In view of
This, nowadays there is an urgent need to design a kind of new method for being used to prepare battery pack, to overcome drawbacks described above.
Summary of the invention
The present invention provides a kind of temperature control method of Li-ion batteries piles, and the battery pack includes multiple single batteries, detection
Device and cooling system, the detector detect the temperature of each single battery, and the cooling system includes air cooling system and liquid
Cooling system starts air cooling system when the temperature of the single battery is higher than first threshold；When single batteries all in battery pack
Average cell temperature be higher than second threshold when, start liquid cooling system；When single battery temperature is higher than first threshold, and average electricity
When pond temperature is higher than second threshold, stop the work that temperature is higher than the single battery of first threshold, and start simultaneously air-cooled
And liquid cooling system.Temperature control method provided by the invention is formulated different refrigerating modes according to the different situation of battery pack, is guaranteed cold
But while efficiency, the energy consumption of cooling system is reduced.
Specific scheme is as follows:
A kind of temperature control method of Li-ion batteries piles, the battery pack include multiple single batteries, detector, controller with
And cooling system, the detector detect the temperature of each single battery, the cooling system includes air cooling system and liquid cooling system
System starts air cooling system when the temperature of the single battery is higher than first threshold；When putting down for single batteries all in battery pack
When equal battery temperature is higher than second threshold, start liquid cooling system；When single battery temperature is higher than first threshold, and average cell temperature
When degree is higher than second threshold, stop the work that temperature is higher than the single battery of first threshold, and start air-cooled and liquid simultaneously
Cooling system.
Further, the first threshold is 50-60 DEG C.
Further, the second threshold is 45-55 DEG C.
Further, the first threshold is higher than second threshold.
Further, the first threshold is 55-60 DEG C；The second threshold is 45-50 DEG C.
A kind of operation method of Li-ion batteries piles, including the temperature control method of preceding claim, the battery inspection
It surveys device and also detects cell voltage, the controller formulates different operational modes, and is believed according to the battery of battery detector feedback
Breath is that single battery selects corresponding operational mode；The operational mode includes entire run mode and intelligent operation mode；?
In the entire run mode, the single battery is in complete electric discharge by voltage and fully charged by being filled between voltage
Discharge cycles；When battery detector detect single battery temperature be greater than battery pack average cell temperature 105-110% when,
The controller specifies the single battery to run intelligent operation mode；In the intelligent operation mode, the single battery exists
Intelligent charge is by voltage and Intelligent discharge by charge and discharge cycles between voltage, and the intelligent charge is by voltage, Yi Jisuo
It states Intelligent discharge blanking voltage and meets following mathematical expression:
Intelligent charge is by voltage (V)=fully charged by voltage-k* (single battery charging voltage change rate/battery
Group average cell charging voltage change rate)
Intelligent discharge is by voltage (V)=electric discharge completely by voltage+b* (single battery discharge voltage change rate/battery
Group average cell discharge voltage change rate)
K=t* (single battery temperature (DEG C)/battery pack average cell temperature -1)
B=s* (single battery temperature (DEG C)/battery pack average cell temperature -1)
The t is 0.6-0.8；The s is 0.1-0.3.
The invention has the following beneficial effects:
1, when some single battery temperature is got higher in battery pack, although the heat exchanger effectiveness of air cooling system is lower,
Since the temperature of battery pack is not high, cooling gas can still keep higher temperature when reaching near the single battery of high temperature
Difference is spent, therefore also can be realized the cooling of single battery by the lower air cooling system of energy consumption；
2, when battery pack mean temperature is got higher, air cooling system can no longer meet cooling demand, and starting energy consumption is higher,
But cooling efficiency and the higher liquid cooling system of heat exchange efficiency are battery cooling；
3, when single battery and higher battery pack mean temperature, a possibility that battery pack is caused danger at this time, is larger,
Therefore start air-cooled and water-cooling system simultaneously, and stop the work of high temperature single battery, fast cooling is carried out to battery pack, and
And a possibility that battery is caused danger is reduced, keep the safe operation of battery pack.
4, by specific operation management system, the cyclical voltage section of battery is controlled, the aging of battery is delayed；
5, the operation management system of battery, when the voltage change ratio when cell charging/discharging is higher, reduction/raising is cut
Slow down the aging of battery to voltage to prevent the charge/discharge excessively of battery；
6, different with the degree of aging under low potential under high potential due to battery, battery-based temperature and electricity
Different adjustment is arranged therefore in buckling rate, and the reasonable value range of charge/discharge blanking voltage is calculated.
Specific embodiment
The present invention will be described in more detail below by specific embodiment, but protection scope of the present invention not by
It is limited to these embodiments.
Embodiment 1
Battery pack, the battery pack include 50 monomer lithium ion batteries, detector, controller and cooling system, institute
Temperature and voltage that detector detects each single battery are stated, the cooling system includes air cooling system and liquid cooling system, works as institute
When stating the temperature of single battery higher than 50 DEG C, start air cooling system；When the average cell temperature of single batteries all in battery pack
When higher than 45 DEG C, start liquid cooling system；When single battery temperature is higher than 50 DEG C, and average cell temperature is higher than 45 DEG C, stop
The work of the single battery of the temperature higher than 50 DEG C, and start air-cooled and liquid cooling system simultaneously；The controller is formulated different
Operational mode, the operational mode includes entire run mode and intelligent operation mode；In the entire run mode, institute
It states single battery and carries out charge and discharge cycles between 2.7-4.2V；When battery detector detects that the temperature of single battery is greater than electricity
Pond group average cell temperature 105% when, the controller specify the single battery run intelligent operation mode；In the intelligence
In operational mode, the single battery is in intelligent charge by voltage and Intelligent discharge by charge and discharge cycles between voltage, institute
It states intelligent charge and meets following mathematical expression by voltage and the Intelligent discharge blanking voltage:
Intelligent charge is by voltage=4.2-k* (single battery charging voltage change rate/battery pack average cell charging electricity
Buckling rate)
Intelligent discharge is by voltage=2.7+b* (single battery discharge voltage change rate/battery pack average cell electric discharge electricity
Buckling rate)
K=0.6* (single battery temperature/battery pack average cell temperature -1)
B=0.1* (single battery temperature/battery pack average cell temperature -1)
Embodiment 2
Battery pack, the battery pack include 50 monomer lithium ion batteries, detector, controller and cooling system, institute
Temperature and voltage that detector detects each single battery are stated, the cooling system includes air cooling system and liquid cooling system, works as institute
When stating the temperature of single battery higher than 60 DEG C, start air cooling system；When the average cell temperature of single batteries all in battery pack
When higher than 55 DEG C, start liquid cooling system；When single battery temperature is higher than 60 DEG C, and average cell temperature is higher than 55 DEG C, stop
The work of the single battery of the temperature higher than 60 DEG C, and start air-cooled and liquid cooling system simultaneously；The controller is formulated different
Operational mode, the operational mode includes entire run mode and intelligent operation mode；In the entire run mode, institute
It states single battery and carries out charge and discharge cycles between 2.7-4.2V；When battery detector detects that the temperature of single battery is greater than electricity
Pond group average cell temperature 110% when, the controller specify the single battery run intelligent operation mode；In the intelligence
In operational mode, the single battery is in intelligent charge by voltage and Intelligent discharge by charge and discharge cycles between voltage, institute
It states intelligent charge and meets following mathematical expression by voltage and the Intelligent discharge blanking voltage:
Intelligent charge is by voltage=4.2-k* (single battery charging voltage change rate/battery pack average cell charging electricity
Buckling rate)
Intelligent discharge is by voltage=2.7+b* (single battery discharge voltage change rate/battery pack average cell electric discharge electricity
Buckling rate)
K=0.7* (single battery temperature/battery pack average cell temperature -1)
B=0.2* (single battery temperature/battery pack average cell temperature -1)
Embodiment 3
Battery pack, the battery pack include 50 monomer lithium ion batteries, detector, controller and cooling system, institute
Temperature and voltage that detector detects each single battery are stated, the cooling system includes air cooling system and liquid cooling system, works as institute
When stating the temperature of single battery higher than 55 DEG C, start air cooling system；When the average cell temperature of single batteries all in battery pack
When higher than 50 DEG C, start liquid cooling system；When single battery temperature is higher than 55 DEG C, and average cell temperature is higher than 50 DEG C, stop
The work of the single battery of the temperature higher than 55 DEG C, and start air-cooled and liquid cooling system simultaneously；The controller is formulated different
Operational mode, the operational mode includes entire run mode and intelligent operation mode；In the entire run mode, institute
It states single battery and carries out charge and discharge cycles between 2.7-4.2V；When battery detector detects that the temperature of single battery is greater than electricity
Pond group average cell temperature 110% when, the controller specify the single battery run intelligent operation mode；In the intelligence
In operational mode, the single battery is in intelligent charge by voltage and Intelligent discharge by charge and discharge cycles between voltage, institute
It states intelligent charge and meets following mathematical expression by voltage and the Intelligent discharge blanking voltage:
Intelligent charge is by voltage=4.2-k* (single battery charging voltage change rate/battery pack average cell charging electricity
Buckling rate)
Intelligent discharge is by voltage=2.7+b* (single battery discharge voltage change rate/battery pack average cell electric discharge electricity
Buckling rate)
K=0.8* (single battery temperature/battery pack average cell temperature -1)
B=0.3* (single battery temperature/battery pack average cell temperature -1)
Embodiment 4
Battery pack, the battery pack include 50 monomer lithium ion batteries, detector, controller and cooling system, institute
Temperature and voltage that detector detects each single battery are stated, the cooling system includes air cooling system and liquid cooling system, works as institute
State single battery temperature it is 60 DEG C high when, start air cooling system；When the average cell temperature of single batteries all in battery pack is high
When 45 DEG C, start liquid cooling system；When single battery temperature is higher than 60 DEG C, and average cell temperature is higher than 45 DEG C, stop temperature
The work of the single battery of the degree higher than 60 DEG C, and start air-cooled and liquid cooling system simultaneously；The controller is formulated different
Operational mode, the operational mode include entire run mode and intelligent operation mode；It is described in the entire run mode
Single battery carries out charge and discharge cycles between 2.7-4.2V；When battery detector detects that the temperature of single battery is greater than battery
When organizing the 105% of average cell temperature, the controller specifies the single battery to run intelligent operation mode；In the intelligence fortune
In row mode, the single battery in intelligent charge by voltage and Intelligent discharge by charge and discharge cycles between voltage, it is described
Intelligent charge meets following mathematical expression by voltage and the Intelligent discharge blanking voltage:
Intelligent charge is by voltage=4.2-k* (single battery charging voltage change rate/battery pack average cell charging electricity
Buckling rate)
Intelligent discharge is by voltage=2.7+b* (single battery discharge voltage change rate/battery pack average cell electric discharge electricity
Buckling rate)
K=0.6* (single battery temperature/battery pack average cell temperature -1)
B=0.3* (single battery temperature/battery pack average cell temperature -1)
Embodiment 5
Battery pack, the battery pack include 50 monomer lithium ion batteries, detector, controller and cooling system, institute
Temperature and voltage that detector detects each single battery are stated, the cooling system includes air cooling system and liquid cooling system, works as institute
When stating the temperature of single battery higher than 55 DEG C, start air cooling system；When the average cell temperature of single batteries all in battery pack
When higher than 45 DEG C, start liquid cooling system；When single battery temperature is higher than 55 DEG C, and average cell temperature is higher than 45 DEG C, stop
The work of the single battery of the temperature higher than 55 DEG C, and start air-cooled and liquid cooling system simultaneously；The controller is formulated different
Operational mode, the operational mode includes entire run mode and intelligent operation mode；In the entire run mode, institute
It states single battery and carries out charge and discharge cycles between 2.7-4.2V；When battery detector detects that the temperature of single battery is greater than electricity
Pond group average cell temperature 105% when, the controller specify the single battery run intelligent operation mode；In the intelligence
In operational mode, the single battery is in intelligent charge by voltage and Intelligent discharge by charge and discharge cycles between voltage, institute
It states intelligent charge and meets following mathematical expression by voltage and the Intelligent discharge blanking voltage:
Intelligent charge is by voltage=4.2-k* (single battery charging voltage change rate/battery pack average cell charging electricity
Buckling rate)
Intelligent discharge is by voltage=2.7+b* (single battery discharge voltage change rate/battery pack average cell electric discharge electricity
Buckling rate)
K=0.8* (single battery temperature/battery pack average cell temperature -1)
B=0.1* (single battery temperature/battery pack average cell temperature -1)
Comparative example 1
Battery pack system, the battery pack include 50 monomer lithium ion batteries, detector, controller and cooling system
System, the detector detect the temperature of each single battery, and the cooling system includes liquid cooling system, when the single battery
When temperature is higher than 55 DEG C, or when the average cell temperature of single batteries all in battery pack is higher than 45 DEG C, start liquid cooling system.
Test and result
By embodiment 1-5, the system of comparative example 1 carries out charge and discharge cycles respectively with the electric current of 0.5C, records following for system
The energy consumption of cooling system and the service life of system after ring 100 times.As it can be seen that being obtained using the battery pack of the embodiment of the present invention
Lower energy consumption and higher service life.
Table 1
| Energy consumption | Cycle life | |
| Embodiment 1 | 23.5kWh | 675 |
| Embodiment 2 | 18.7kWh | 694 |
| Embodiment 3 | 21.0kWh | 680 |
| Embodiment 4 | 19.9kWh | 653 |
| Embodiment 5 | 22.1kWh | 662 |
| Comparative example 1 | 32.1kWh | 411 |
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it would be recognized that above-mentioned
Description be not considered as limitation of the present invention.
Claims (6)
1. a kind of temperature control method of Li-ion batteries piles, the battery pack includes multiple single batteries, detector, controller and
Cooling system, the detector detect the temperature of each single battery, and the cooling system includes air cooling system and liquid cooling system,
When the temperature of the single battery is higher than first threshold, start air cooling system；When being averaged for single batteries all in battery pack
When battery temperature is higher than second threshold, start liquid cooling system；When single battery temperature is higher than first threshold, and average cell temperature
When higher than second threshold, stop the work that temperature is higher than the single battery of first threshold, and start air-cooled and liquid cooling simultaneously
System.
2. the method as described in claim 1, the first threshold is 50-60 DEG C.
3. the method as described in claim 1, the second threshold is 45-55 DEG C.
4. the method according to claim 1, the first threshold is higher than second threshold.
5. method as claimed in claim 4, the first threshold is 55-60 DEG C；The second threshold is 45-50 DEG C.
6. a kind of operation method of Li-ion batteries piles, including the described in any item temperature control methods of claim 1-5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515246.6A CN109213227A (en) | 2017-06-29 | 2017-06-29 | A kind of temperature control method of Li-ion batteries piles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710515246.6A CN109213227A (en) | 2017-06-29 | 2017-06-29 | A kind of temperature control method of Li-ion batteries piles |
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| CN201710515246.6A Withdrawn CN109213227A (en) | 2017-06-29 | 2017-06-29 | A kind of temperature control method of Li-ion batteries piles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416659A (en) * | 2019-08-20 | 2019-11-05 | 西宁月光太阳能科技有限公司 | A kind of Intelligent lithium battery guard method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496747A (en) * | 2011-11-18 | 2012-06-13 | 中国检验检疫科学研究院 | Thermal management device for power batteries and thermal management method for power batteries |
| JP2013148510A (en) * | 2012-01-20 | 2013-08-01 | Saxa Inc | Battery-driven electronic apparatus and battery voltage monitoring method for the same |
| CN105186061A (en) * | 2015-08-25 | 2015-12-23 | 吉林大学 | Heat management system for power batteries and control method |
-
2017
- 2017-06-29 CN CN201710515246.6A patent/CN109213227A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496747A (en) * | 2011-11-18 | 2012-06-13 | 中国检验检疫科学研究院 | Thermal management device for power batteries and thermal management method for power batteries |
| JP2013148510A (en) * | 2012-01-20 | 2013-08-01 | Saxa Inc | Battery-driven electronic apparatus and battery voltage monitoring method for the same |
| CN105186061A (en) * | 2015-08-25 | 2015-12-23 | 吉林大学 | Heat management system for power batteries and control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416659A (en) * | 2019-08-20 | 2019-11-05 | 西宁月光太阳能科技有限公司 | A kind of Intelligent lithium battery guard method |
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Application publication date: 20190115 |