CN105098272B - A kind of safe lithium secondary battery charging method - Google Patents
A kind of safe lithium secondary battery charging method Download PDFInfo
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- CN105098272B CN105098272B CN201510408433.5A CN201510408433A CN105098272B CN 105098272 B CN105098272 B CN 105098272B CN 201510408433 A CN201510408433 A CN 201510408433A CN 105098272 B CN105098272 B CN 105098272B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The present invention discloses a kind of safe lithium secondary battery charging method.Method comprises the following steps：Step S110, obtains the inside actual temperature T of lithium ion batteryIt is real, according to TIt is realTransfer corresponding charge mode；Step S120, according to step S110 charge mode, charges to lithium ion battery；Step S130, lithium ion battery charging reaches rated capacity value, completes charging.This safe lithium secondary battery charging method, can both meet the charging under Alpine-cold condition, can also meet the charging under hot conditions, with wider charging temperature scope, can receive the challenge that harsh and unforgiving environments and harsh conditions are brought, with higher security.
Description
Technical field
The present invention relates to lithium ion battery charging technique field, more particularly to a kind of safe lithium secondary battery charging side
Method.
Background technology
The fast development of electric automobile proposes higher requirement to charging system, and electric automobile is in outdoor operation, electricity
Pond is constantly in charging and discharging state, it is necessary to carry out the detailed-oriented management of high security and high reliability to battery.Particularly
In the lithium ion battery using high-energy-density, not only to ensure that lithium ion battery is reliably used under normal temperature condition, but also
Ensure that lithium ion battery is reliably used under high and cold, hot conditions, to receive the challenge that harsh and unforgiving environments are brought.
Due to lithium battery under cryogenic it is easy to charge negative pole separate out lithium crystal and cause internal short-circuit, produce peace
Full hidden danger, and when charging current is bigger, this potential safety hazard is more serious.At low temperature, battery core is electric for lithium ion battery
The reaction of pole is very slow, and electrolyte can solidify, and battery performance is low, and the charging interval shortens, and the electricity of actual charging is seldom used
When battery actual performance well below battery demarcate electricity so that the normal use time of battery is greatly shortened.Existing skill
In art scheme, above-mentioned potential safety hazard is mainly solved using the method for heating management, such a method using heating management exists
It is difficult to carry out on the electric automobile of outdoor operation.
In addition, lithium ion battery is under the high temperature conditions, the reaction of its battery core electrode is very active, if continuing to carry out it
Normal current charges or high current charging, can further improve the temperature of inside lithium ion cell, exacerbate the wind of battery explosion
Danger.
The content of the invention
The purpose of the present invention is to overcome weak point of the prior art there is provided a kind of safe lithium of high security is secondary
Method for charging batteries.
The purpose of the present invention is achieved through the following technical solutions：
A kind of safe lithium secondary battery charging method, comprises the following steps：
Step S110, obtains the inside actual temperature T of lithium ion batteryIt is real, according to TIt is realCorresponding charge mode is transferred,
The temperature range of charge mode is divided into TIt is real=(- ∞, -40 DEG C】、TIt is real=(- 40 DEG C, -10 DEG C), TIt is real=【-10
DEG C, 0 DEG C), TIt is real=【0 DEG C, 5 DEG C), TIt is real=【5 DEG C, 15 DEG C), TIt is real=【15 DEG C, 45 DEG C), TIt is real=【45 DEG C, 50 DEG C), TIt is real=【50
DEG C, 70 DEG C), TIt is real=【70 DEG C ,+∞),
Step S120, the temperature range according to corresponding to step S110 charge mode, charges to lithium ion battery,
TIt is real=(- ∞, -40 DEG C】, lithium ion battery is stopped to charge,
TIt is real=(- 40 DEG C, -10 DEG C), pulse mode charging and discharging are carried out to lithium ion battery,
TIt is real=【- 10 DEG C, 0 DEG C), pulse mode charging and discharging are carried out to lithium ion battery,
TIt is real=【0 DEG C, 5 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually lifted,
TIt is real=【5 DEG C, 15 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually lifted,
TIt is real=【15 DEG C, 45 DEG C), lithium ion battery is charged with constant charge rate,
TIt is real=【45 DEG C, 50 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually reduced,
TIt is real=【50 DEG C, 70 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually reduced,
TIt is real=【70 DEG C ,+∞), lithium ion battery is stopped to charge；
Step S130, lithium ion battery charging reaches rated capacity value, completes charging.
It is preferred that, the inside actual temperature T of lithium ion batteryIt is real=TTable+ △ T, TTableFor the surface temperature of lithium ion battery, △
T is temperature range regulated value, is obtained by temperature range regulated value table.
It is preferred that,
TIt is real=(- 40 DEG C, -10 DEG C), carry out pulse mode charging and discharging, first with speed C to lithium ion battery1Charging
t1Time, charging t is then stopped with speed 0Fill and stopTime, then with speed C2Discharge t2Time, then electric discharge t is stopped with speed 0Put and stop
Time, and so repeatedly,
Wherein, Q1=C1×t1, Q2=C2×t2, Q1＞ Q2, Q1For charge volume, Q2For discharge capacity,
TIt is real=【- 10 DEG C, 0 DEG C), pulse mode charging and discharging are carried out to lithium ion battery, first with speed C3Charge t3
Time, charging t is then stopped with speed 0Fill and stop' the time, then with speed C4Discharge t4Time, then electric discharge t is stopped with speed 0Put and stop
' time, and so repeatedly,
Wherein, Q3=C3×t3, Q4=C4×t4, Q3＞ Q4, Q3For charge volume, Q4For discharge capacity,
And, C1＜ C3。
It is preferred that, C1=C2+△C1, △ C1For charge rate range regulation value.
It is preferred that, C1=0.05C, △ C1=0.01C.
It is preferred that, C3=C4+△C2, △ C2For speed range regulated value.
It is preferred that, C3=0.1C, △ C2=0.03C.
It is preferred that,
TIt is real=【0 DEG C, 5 DEG C), to lithium ion battery with C5=0.03TIt is real+ 0.05 speed charging,
TIt is real=【5 DEG C, 15 DEG C), to lithium ion battery with C6=0.02TIt is real+ 0.1 speed charging,
TIt is real=【15 DEG C, 45 DEG C), to lithium ion battery with C7=【1C, 3C】Between a constant rate of speed charging,
TIt is real=【45 DEG C, 50 DEG C), to lithium ion battery with C8=-0.04TIt is real+ 2.2 speed charging,
TIt is real=【50 DEG C, 70 DEG C), to lithium ion battery with C9=-0.0075TIt is real+ 0.575 speed charging.
A kind of safe lithium secondary battery charging device, including：Battery pack, charger, load, temperature detecting module,
BMS, main control module, the BMS have thermostat unit；
The charger is connected with the battery pack, and the charger is used for for battery pack charging；
The load is connected with the battery pack, described to load for being the battery power discharge；
The BMS is connected by the temperature detecting module with the battery pack, and the temperature detecting module is used to detect
The surface temperature T of the battery packTable, and by surface temperature TTableSend to the BMS, the thermostat unit of the BMS
Surface temperature TTableHandled, obtain internal actual temperature TIt is real；
The BMS is connected with the main control module, and the BMS is by internal actual temperature TIt is realSend to the main control module；
The main control module is connected with the charger and the load, and the main control module is according to internal actual temperature TIt is real
Start corresponding control instruction, control the charger to charge the battery pack, or control the load to the battery pack
Electric discharge.
It is preferred that, the main control module has (- ∞, -40 DEG C】Control unit, (- 40 DEG C, -10 DEG C) control unit,【-10
DEG C, 0 DEG C) control unit,【0 DEG C, 5 DEG C) control unit,【5 DEG C, 15 DEG C) control unit,【15 DEG C, 45 DEG C) control unit,【45
DEG C, 50 DEG C) control unit,【50 DEG C, 70 DEG C) control unit,【70 DEG C ,+∞) control unit, the control unit of each temperature range
Provided with corresponding control instruction.
Work as TIt is real=(- 40 DEG C, -10 DEG C), or TIt is real=【- 10 DEG C, 0 DEG C), to lithium ion battery carry out pulse mode charging and
Electric discharge, realizes the circulation pattern of " charging-stopping (standing)-electric discharge-stopping (standing)-charging ", and charge capacity is slightly larger than
Discharge electricity amount, with the progress of this charging process, the temperature of lithium battery can be gradually increasing, the area then risen according to temperature
Between, be converted to corresponding charge mode.In such a mode, what " stop (standing) " process was conducive to charge and discharge process goes to pole
Change, prevent the generation of " Li dendrite ".
Charge capacity is slightly larger than discharge electricity amount, i.e. Q1＞ Q2, can more preferably protect lithium battery.When setting charging interval, electric discharge
Between, stop the charge and discharge time it is identical so that C1＞ C2, C3＞ C4, so as to meet Q1＞ Q2, Q3＞ Q4.Set a charge rate scope
Regulated value △ C1、△C2, to meet C1=C2+△C1, C3=C4+△C2。
Work as TIt is real=【0 DEG C, 5 DEG C), or TIt is real=【5 DEG C, 15 DEG C), because lithium ion battery is in low-temperature condition, with temperature
Rise, the charge rate of lithium ion battery is gradually lifted, be that is to say, it is right with the reduction of temperature in this temperature range
The charge rate of lithium ion battery is gradually reduced.
Work as TIt is real=【45 DEG C, 50 DEG C), or TIt is real=【50 DEG C, 70 DEG C), because lithium ion battery is in the condition of high temperature, at this
One temperature range, with the rise of temperature, is gradually reduced to the charge rate of lithium ion battery, it is possible to decrease battery core electrode it is anti-
Should, the temperature of inside lithium ion cell is reduced, the risk that lithium battery explodes is reduced.
Such a safe lithium secondary battery charging method, you can meet the lithium cell charging under Alpine-cold condition, can also expire
Lithium cell charging under sufficient hot conditions, with wider charging temperature scope, can preferably receive harsh and unforgiving environments and harsh bar
The challenge that part is brought, with higher security.
Brief description of the drawings
Fig. 1 is a kind of safe lithium secondary battery charging method of one embodiment of the invention in TIt is real=(- 40 DEG C, -10 DEG C)
In the range of charge mode figure；
Fig. 2 is a kind of safe lithium secondary battery charging method of one embodiment of the invention in TIt is real=【- 10 DEG C, 0 DEG C) model
Enclose interior charge mode figure；
Fig. 3 is a kind of safe lithium secondary battery charging method of one embodiment of the invention in TIt is real=【0 DEG C, 5 DEG C), TIt is real=
【5 DEG C, 15 DEG C), TIt is real=【45 DEG C, 50 DEG C), TIt is real=【50 DEG C, 70 DEG C) in the range of charge mode figure；
Fig. 4 is a kind of functional block diagram of safe lithium secondary battery charging device of one embodiment of the invention.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Because the intercalation potential and lithium sedimentation potential of graphite are very close to when a large amount of lithium ions are in graphite cathode surface aggregation
When, or the speed that lithium ion is deposited in negative terminal surface is more than its speed being embedded in inside pole piece, such as and high current, low temperature is filled
Electricity, it is possible to cause to analyse lithium.For this reason, it may be necessary to according to change (the lithium battery interior actual temperature of lithium battery interior actual temperature
Use symbol TIt is realRepresent), charge rate C of the correspondence regulation to lithium battery.
The lithium secondary battery charging method of safety comprises the following steps：
Step S110, obtains the inside actual temperature T of lithium ion batteryIt is real, according to TIt is realCorresponding charge mode is transferred,
Step S120, the temperature range according to corresponding to step S110 charge mode, charges to lithium ion battery,
Step S130, lithium ion battery charging reaches rated capacity value, completes charging.
For step S110,
To be illustrated, electrolyte level is in the enclosure interior of lithium battery, only relatively accurate judgement lithium battery
The actual temperature in portion, could preferably be made to lithium battery and be charged with which kind of charge rate value.Examined using conventional temperature
Instrument is surveyed, surface temperature (the lithium battery surface temperature symbol T of lithium battery can only be typically measuredTableRepresent), and be difficult to be deep into
The inside of lithium battery is measured to the temperature of its electrolyte.Therefore, by inquiring about temperature range regulated value table, can obtain more
Accurate lithium battery interior actual temperature.
Temperature range regulated value table
Understand, with lithium battery surface temperature TTableRise, the numerical value △ T-phase of temperature range regulated value should reduce.Surveying
Lithium battery surface temperature it is relatively low when, because lithium battery is in the environment of low temperature, the radiating on lithium battery surface is relatively fast,
The appropriate numerical value △ T for increasing temperature range regulated value, and when the surface temperature for measuring lithium battery is higher, because lithium battery is in
In the environment of high temperature, the radiating on lithium battery surface is relatively slow, the appropriate numerical value for reducing temperature range regulated value.
The inside actual temperature T of lithium ion batteryIt is real=TTable+ △ T, lithium ion is obtained by inquiring about temperature range regulated value table
The inside actual temperature T of batteryIt is real。
Specifically, the temperature range of charge mode is divided into TIt is real=(- ∞, -40 DEG C】、TIt is real=(- 40 DEG C, -10 DEG C), TIt is real
=【- 10 DEG C, 0 DEG C), TIt is real=【0 DEG C, 5 DEG C), TIt is real=【5 DEG C, 15 DEG C), TIt is real=【15 DEG C, 45 DEG C), TIt is real=【45 DEG C, 50 DEG C), TIt is real
=【50 DEG C, 70 DEG C), TIt is real=【70 DEG C ,+∞).
For step S120,
Referring to Fig. 1,
TIt is real=(- 40 DEG C, -10 DEG C), carry out pulse mode charging and discharging, first with speed C to lithium ion battery1Charging
t1Time, charging t is then stopped with speed 0Fill and stopTime, then with speed C2Discharge t2Time, then electric discharge t is stopped with speed 0Put and stop
Time, and so repeatedly,
Wherein, Q1=C1×t1, Q2=C2×t2, Q1＞ Q2, Q1For charge volume, Q2For discharge capacity,
Referring to Fig. 2,
TIt is real=【- 10 DEG C, 0 DEG C) pulse mode charging and discharging are carried out to lithium ion battery, first with speed C3Charge t3When
Between, charging t is then stopped with speed 0Fill and stop' the time, then with speed C4Discharge t4Time, then electric discharge t is stopped with speed 0Put and stop' when
Between, and so repeatedly,
Wherein, Q3=C3×t3, Q4=C4×t4, Q3＞ Q4, Q3For charge volume, Q4For discharge capacity,
And, C1＜ C3, with the rise of temperature, the appropriate charge-discharge velocity increased to lithium battery.
Referring to Fig. 3, TIt is real=【0 DEG C, 5 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually carried
Rise, i.e., to lithium ion battery with C5=K1TIt is real+X1Speed charging.Specifically, to lithium ion battery with C5=0.03TIt is real+0.05
Speed charging, work as TIt is realAt=0 DEG C, C5=0.05C, the like.
Referring to Fig. 3, TIt is real=【5 DEG C, 15 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually carried
Rise, to lithium ion battery with C6=K2TIt is real+X2Speed charging, i.e., to lithium ion battery with C6=K2TIt is real+X2Speed charging.Tool
Body is, to lithium ion battery with C6=0.02TIt is real+ 0.1 speed charging, works as TIt is realAt=5 DEG C, C6=0.2C, the like.
TIt is real=【15 DEG C, 45 DEG C), lithium ion battery is charged with constant charge rate, i.e., to lithium ion battery with C7Speed
Rate charges, specifically, to lithium ion battery with C7=【1C, 3C】Between a constant rate of speed charging, preferably using 2C's
Constant current is charged.
Referring to Fig. 3, TIt is real=【45 DEG C, 50 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually dropped
It is low, i.e., to lithium ion battery with C8=K3TIt is real+X3Speed charging.Specifically, to lithium ion battery with C8=-0.04TIt is real+2.2
Speed charging, work as TIt is realAt=45 DEG C, C8=0.4C, the like.
Referring to Fig. 3, TIt is real=【50 DEG C, 70 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually dropped
It is low, i.e., to lithium ion battery with C9=K4TIt is real+X4Speed charging.Specifically, to lithium ion battery with C9=-0.0075TIt is real+
0.575 speed charging, works as TIt is realAt=50 DEG C, C9=0.2C, the like.
TIt is real=(- ∞, -40 DEG C】, or TIt is real=【70 DEG C ,+∞), lithium ion battery is stopped to charge.
Work as TIt is real=【0 DEG C, 5 DEG C), or TIt is real=【5 DEG C, 15 DEG C), because lithium ion battery is in low-temperature condition, with temperature
Rise, the charge rate of lithium ion battery is gradually lifted, be that is to say, it is right with the reduction of temperature in this temperature range
The charge rate of lithium ion battery is gradually reduced.
Work as TIt is real=【45 DEG C, 50 DEG C), or TIt is real=【50 DEG C, 70 DEG C), because lithium ion battery is in the condition of high temperature, at this
One temperature range, with the rise of temperature, is gradually reduced to the charge rate of lithium ion battery, it is possible to decrease battery core electrode it is anti-
Should, the temperature of inside lithium ion cell is reduced, the risk that lithium battery explodes is reduced.
Work as TIt is real≤ -40 DEG C, or TIt is real>=70 DEG C, deenergization stops to lithium cell charging, it is ensured that safety.
To be illustrated, work as TIt is real=(- 40 DEG C, -10 DEG C), or TIt is real=【- 10 DEG C, 0 DEG C), at lithium ion battery
In extremely low temperature state, pulse mode charging and discharging are carried out to lithium ion battery.Realize " charging-stopping (standing)-electric discharge-
The circulation pattern of stopping (standing)-charging ", charge capacity is slightly larger than discharge electricity amount, with the progress of this charging process, lithium
The temperature of battery can be gradually increasing, the interval then risen according to temperature, be converted to corresponding charge mode.In this pattern
Under, " stopping (standing) " process is conducive to the depolarising of charge and discharge process, prevents the generation of " Li dendrite ".
Charge capacity is slightly larger than discharge electricity amount, i.e. Q1＞ Q2, can more preferably protect lithium battery.In the present embodiment, preferably
For setting charging interval, discharge time, stopping charge and discharge time are identical (such as being set as 5 seconds) so that C1＞ C2, C3＞ C4,
So as to meet Q1＞ Q2, Q3＞ Q4.Set a charge rate range regulation value △ C1、△C2, to meet C1=C2+△C1, C3=
C4+△C2, specifically in the present embodiment, C1=0.05C, C3=0.1C, corresponding, △ C1=0.01C, △ C2=0.03C, can
Know, C2=0.04C, C4=0.07C.
In other embodiments, charging interval, discharge time, stopping charge and discharge time can also be adjusted, so that full
Sufficient Q1＞ Q2, Q3＞ Q4.Or, to charging interval, discharge time, stop charge and discharge time, C1、C2、C3、C4Comprehensive adjustment is carried out, from
And meet Q1＞ Q2, Q3＞ Q4。
Such a safe lithium secondary battery charging method, you can meet the lithium cell charging under Alpine-cold condition, can also expire
Lithium cell charging under sufficient hot conditions, with wider charging temperature scope, can preferably receive harsh and unforgiving environments and harsh bar
The challenge that part is brought, with higher security.
Referring to Fig. 4, it is corresponding with a kind of above-mentioned safe lithium secondary battery charging method, while also providing a kind of safe
Lithium secondary battery charging device 10, including：Battery pack 100, load 200, charger 300, temperature detecting module 400, BMS500,
Main control module 600, BMS500 has thermostat unit 510.
Charger 300 is connected with battery pack 100, and charger 300 is used to charge for battery pack 100；Load 200 and battery pack
100 connections, load 200 is used to discharge for battery pack 100.
BMS500 is connected by temperature detecting module 400 with battery pack 100, and temperature detecting module 400 is used to detect battery
The surface temperature T of group 100Table, and by surface temperature TTableSend to BMS500, BMS500 thermostat unit 510 is to surface temperature
Spend TTableHandled, obtain internal actual temperature TIt is real。
BMS500 is connected with main control module 600, and BMS500 is by internal actual temperature TIt is realSend to main control module 600.
Main control module 600 is connected with charger 300 and load 200, and main control module 600 is according to internal actual temperature TIt is realStart
Corresponding control instruction, control charger 300 is charged to battery pack 100, or control 200 pairs of battery packs 100 of load are discharged.
Further, main control module 600 has (- ∞, -40 DEG C】Control unit 610, (- 40 DEG C, -10 DEG C) control unit
620、【- 10 DEG C, 0 DEG C) control unit 630,【0 DEG C, 5 DEG C) control unit 640,【5 DEG C, 15 DEG C) control unit 650,【15 DEG C,
45 DEG C) control unit 660,【45 DEG C, 50 DEG C) control unit 670,【50 DEG C, 70 DEG C) control unit 680,【70 DEG C ,+∞) control
Unit 690, the control unit of each temperature range is provided with corresponding control instruction,
It is：
TIt is real=(- ∞, -40 DEG C】, " stopping charging to lithium ion battery " control instruction is sent,
TIt is real=(- 40 DEG C, -10 DEG C), send " carrying out pulse mode charging and discharging to lithium ion battery " instruction,
TIt is real=【- 10 DEG C, 0 DEG C), " pulse mode charging and discharging are carried out to lithium ion battery " instruction is sent,
TIt is real=【0 DEG C, 5 DEG C), send " with the rise of temperature, gradually being lifted to the charge rate of lithium ion battery " and refer to
Order,
TIt is real=【5 DEG C, 15 DEG C), send " with the rise of temperature, gradually being lifted to the charge rate of lithium ion battery " and refer to
Order,
TIt is real=【15 DEG C, 45 DEG C), " being charged to lithium ion battery with constant charge rate " instruction is sent,
TIt is real=【45 DEG C, 50 DEG C), send " with the rise of temperature, gradually being reduced to the charge rate of lithium ion battery " and refer to
Order,
TIt is real=【50 DEG C, 70 DEG C), send " with the rise of temperature, gradually being reduced to the charge rate of lithium ion battery " and refer to
Order,
TIt is real=【70 DEG C ,+∞), send " stopping charging to lithium ion battery " instruction.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (8)
1. a kind of safe lithium secondary battery charging method, it is characterised in that comprise the following steps：
Step S110, obtains the inside actual temperature T of lithium ion batteryIt is real, according to TIt is realCorresponding charge mode is transferred,
The temperature range of charge mode is divided into TIt is real=(- ∞, -40 DEG C], TIt is real=(- 40 DEG C, -10 DEG C), TIt is real=[- 10 DEG C, 0
℃)、TIt is real=[0 DEG C, 5 DEG C), TIt is real=[5 DEG C, 15 DEG C), TIt is real=[15 DEG C, 45 DEG C), TIt is real=[45 DEG C, 50 DEG C), TIt is real=[50 DEG C, 70
℃)、TIt is real=[70 DEG C ,+∞),
Step S120, the temperature range according to corresponding to step S110 charge mode, charges to lithium ion battery,
TIt is real=(- ∞, -40 DEG C], lithium ion battery is stopped to charge,
TIt is real=(- 40 DEG C, -10 DEG C), pulse mode charging and discharging are carried out to lithium ion battery,
TIt is real=[- 10 DEG C, 0 DEG C), pulse mode charging and discharging are carried out to lithium ion battery,
TIt is real=[0 DEG C, 5 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually lifted,
TIt is real=[5 DEG C, 15 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually lifted,
TIt is real=[15 DEG C, 45 DEG C), lithium ion battery is charged with constant charge rate,
TIt is real=[45 DEG C, 50 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually reduced,
TIt is real=[50 DEG C, 70 DEG C), with the rise of temperature, the charge rate of lithium ion battery is gradually reduced,
TIt is real=[70 DEG C ,+∞), lithium ion battery is stopped to charge；
Step S130, lithium ion battery charging reaches rated capacity value, completes charging.
2. safe lithium secondary battery charging method according to claim 1, it is characterised in that the inside of lithium ion battery is real
Border temperature TIt is real=TTable+ △ T, TTableFor the surface temperature of lithium ion battery, △ T are temperature range regulated value, are adjusted by temperature range
Section value table is obtained.
3. safe lithium secondary battery charging method according to claim 1, it is characterised in that
TIt is real=(- 40 DEG C, -10 DEG C), carry out pulse mode charging and discharging, first with speed C to lithium ion battery1Charge t1When
Between, charging t is then stopped with speed 0Fill and stopTime, then with speed C2Discharge t2Time, then electric discharge t is stopped with speed 0Put and stopTime,
And so repeatedly,
Wherein, Q1=C1×t1, Q2=C2×t2, Q1＞ Q2, Q1For charge volume, Q2For discharge capacity,
TIt is real=[- 10 DEG C, 0 DEG C), pulse mode charging and discharging are carried out to lithium ion battery, first with speed C3Charge t3When
Between, charging t is then stopped with speed 0Fill and stop' time, then with speed C4Discharge t4Time, then electric discharge t is stopped with speed 0Put and stop' when
Between, and so repeatedly,
Wherein, Q3=C3×t3, Q4=C4×t4, Q3＞ Q4, Q3For charge volume, Q4For discharge capacity,
And, C1＜ C3。
4. safe lithium secondary battery charging method according to claim 3, it is characterised in that C1=C2+△C1, △ C1To fill
Electric speed range regulated value.
5. safe lithium secondary battery charging method according to claim 4, it is characterised in that C1=0.05C, △ C1=
0.01C。
6. safe lithium secondary battery charging method according to claim 3, it is characterised in that C3=C4+△C2, △ C2For speed
Rate range regulation value.
7. safe lithium secondary battery charging method according to claim 6, it is characterised in that C3=0.1C, △ C2=
0.03C。
8. safe lithium secondary battery charging method according to claim 1, it is characterised in that
TIt is real=[0 DEG C, 5 DEG C), to lithium ion battery with C5=0.03TIt is real+ 0.05 speed charging,
TIt is real=[5 DEG C, 15 DEG C), to lithium ion battery with C6=0.02TIt is real+ 0.1 speed charging,
TIt is real=[15 DEG C, 45 DEG C), to lithium ion battery with C7Constant rate of speed charging between=[1C, 3C],
TIt is real=[45 DEG C, 50 DEG C), to lithium ion battery with C8=-0.04TIt is real+ 2.2 speed charging,
TIt is real=[50 DEG C, 70 DEG C), to lithium ion battery with C9=-0.0075TIt is real+ 0.575 speed charging.
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| TWI702747B (en) * | 2019-01-25 | 2020-08-21 | 大陸商太普動力新能源（常熟）股份有限公司 | Battery and method for charging a battery cell thereof |
| CN109786877B (en) * | 2019-02-28 | 2020-11-06 | 深圳猛犸电动科技有限公司 | Charging method and device for lithium ion battery pack and terminal equipment |
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