CN106953396A - A kind of large-capacity battery pack charging system - Google Patents
A kind of large-capacity battery pack charging system Download PDFInfo
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- CN106953396A CN106953396A CN201710299505.6A CN201710299505A CN106953396A CN 106953396 A CN106953396 A CN 106953396A CN 201710299505 A CN201710299505 A CN 201710299505A CN 106953396 A CN106953396 A CN 106953396A
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- H02J7/045—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of large-capacity battery pack charging system, it includes：Master switch, rectifier, DC dc converter, controller, switch-dividing, battery electric quantity checking device, battery temperature detection means and DC dc converter detection means, charged by the relatively low battery of battery unit electricity sequence prioritizing selection electricity in battery pack, charge efficiency can be improved, by setting battery unit charging temperature threshold value, realize safe charging, and use the DC dc converter for taking into full account large-capacity battery pack charge requirement using original creation, rechargeable electrical energy quality is improved, extends the service life of battery.
Description
Technical field
The present invention relates to a kind of large-capacity battery pack charging system, and in particular to one kind can be according to battery electric quantity and temperature
Carry out the charging system of charging switching.
Background technology
Existing batter-charghing system is all, to the direct charging of battery pack, not account in charging interval or charging system offer
In the case that electricity is limited, the problem of being charged to battery, when charging between or charging system provide electricity it is limited when, it is impossible to make
Each battery unit reached and completely fill in battery pack, and carry out the selection of rechargeable battery cell at random or successively to rechargeable battery list
Member is selected, and is easily caused the unbalanced problem of battery electric quantity in battery pack, is reduced battery life, in addition, battery is for a long time
Charged under higher temperature conditions, the problems such as easily occurring battery explosion.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, a kind of large-capacity battery pack charging system is invented, both may be used
To ensure battery after charging, electric quantity balancing can be reached, when the battery is charged again, temperature-controllable improves the longevity of battery
Order and ensured the safety of charging.
The technical scheme that the present invention is provided is：A kind of large-capacity battery pack charging system, it includes：Master switch, rectification
Device, DC-DC converter, controller, switch-dividing, battery electric quantity checking device, battery temperature detection means and DC-to-dc
Converter detection means, it is characterised in that：Wherein, master switch is used for charging AC power and the rectifier for inputting charging system
Isolation, in case of a fault, deenergization to system interior element to protect, and rectifier is used to charging alternating current being converted into
Direct current, the direct current that DC-DC converter is used to export in rectifier is converted into being adapted to the straight of large-capacity battery pack charging
Stream electricity, battery electric quantity checking device is used for the electricity for detecting each battery unit in battery pack, and the charge value of detection is inputted
To controller, battery temperature detection means is used to detecting the temperature of each battery unit in battery pack, and by the temperature value of detection
Input is inputted to controller to controller, and by the charge value of detection, and DC-DC converter detection means is used to detect straight
The voltage and current of stream-DC converter output, and the magnitude of voltage detected and current value are inputted to controller, controller is also
Charging for receiving user input allows time and the maximum allowable output charge power of charging system, and is permitted according to the charging
Perhaps time and the maximum allowable output charge power calculate charging system maximum output electricity in the charging permission time, control
Device calculates battery charge requirement electricity always according to the charge value and battery pack total electricity value of the detection, and controller is according to described
The temperature of charging system maximum output electricity, the battery charge requirement electricity and battery unit in the charging permission time, selection
Property switching switch-dividing is to select rechargeable battery.
Alternating current input power supplying is connected with master switch one end, and the master switch other end is connected with rectifier one end, and rectifier is another
End is connected with DC-DC converter one end, and the DC-DC converter other end is connected with multiple switch-dividing one end respectively, greatly
Each battery unit correspondence one in capacity batteries group is used for the switch-dividing of charge control, multiple switch-dividing other end connection electricity
Pool unit, controller is connected by bus with DC-DC converter, is entered for the working condition to DC-DC converter
Row detection, and its output control is instructed, controller is connected with battery unit, the electricity for detecting each battery unit, control
Device processed is connected with multiple switch-dividings, the break-make for controlling switch-dividing.
DC-DC converter includes direct current positive input terminal 201, direct current negative input end 202, electric capacity 203, electric capacity
204th, switch 205, switch 206, transformer 207, diode 208, diode 209, diode 210, diode 211, inductance
212nd, electric capacity 213, direct current positive output end 214, direct current negative output terminal 215, wherein, direct current positive input terminal 201 and rectification
Device positive output end is connected and direct current negative input end 202 is connected with rectifier negative output terminal, and direct current positive input terminal 201 is also distinguished
With electric capacity 203 and switch 205 one end be connected, the other end of electric capacity 203 also respectively with the primary side of transformer 207 and the one end of electric capacity 204
It is connected, the other end of electric capacity 204 is connected with direct current negative input end 202 and 206 one end of switch respectively, switch 205 other ends difference
It is connected with switch 206 and the primary side other end of transformer 207, the anode of the primary side one end of transformer 207 respectively with diode 208
Be connected with the negative electrode of diode 209, the primary side other end of transformer 207 respectively with the anode of diode 210 and diode 211
Negative electrode is connected, and the one end of reactor 212 is connected with the negative electrode of diode 208 and the negative electrode of diode 210 respectively, and reactor 212 is another
One end is connected with electric capacity 213 and direct current positive output end 214 respectively, the other end of electric capacity 213 respectively with direct current negative output terminal
215th, the anode of diode 209, diode 211 anode be connected, direct current positive output end 214 respectively with each battery unit pair
The switch-dividing answered is connected, switch-dividing corresponding with each battery unit is connected direct current negative output terminal 215 respectively.
DC-DC converter is to ensure to remain to the maximum voltage required by output when DC bus-bar voltage is minimum, is become
Transformer voltage ratio is determined as follows：, in formula：For DC bus-bar voltage most
The maximum voltage of output is remained to when low,For diode 208, diode 209, diode 210, diode 211 tube voltage drop,For dc bus minimum voltage,For primary side umber of turn,For primary side umber of turn.
Do not controlled by what diode 208, diode 209, diode 210 and diode 211 were constituted in DC-DC converter
Rectifier bridge carries out parameter selection as follows：（1）Voltage：,For rectifier bridge
Rated operational voltage,The line voltage inputted for rectifier bridge；（2）Electric current：,For rectification
The rated operational current of bridge,For load average electric current.
The output filter circuit being made up of in DC-DC converter inductance 212 and electric capacity 213 is carried out as follows
Parameter is selected：,For transformer secondary output voltage,For DC bus-bar voltage maximum,For transformer voltage ratio,,For DC-DC converter duty cycle of switching, ,For the inductance value of filter circuit,For minimum output current,For switch periods,,For the capacitance of filter circuit,For maximum voltage ripple.
Rechargeable battery is selected as follows, (1) calculates charger in the specified charging interval and can provided most
Big charge volume,, wherein,For charger rated output power value,For the specified charging interval,For power
Electricity transformation ratio；（2）Judge that can the maximum charge amount so that all battery units completely fill, when the maximum charge amount energy
So that during all battery unit full charge, then into step（3）, when the maximum charge amount can not make it that all battery units are expired
During charging, then into step（8）；（3）All battery units in battery pack are charged simultaneously, charging are kept, and detect the electricity
Whether dump energy exceedes battery unit specified electric quantity after pool unit charging, and dump energy does not surpass after the battery unit charges
When crossing battery unit rated capacity, then into step（4）；（4）Detect whether the battery cell temperature exceedes assigned temperature threshold
Value, when the battery cell temperature is not less than assigned temperature threshold value, then return to step（3）, refer to when battery cell temperature exceedes
When determining temperature threshold, then into step（5）；（5）Stop charging to the battery unit, everyThe battery is detected after time
Unit electricity and the battery cell temperature,（6）When the battery unit dump energy is not less than battery unit rated capacity and described
When battery cell temperature is not less than assigned temperature threshold value, then return to step（3）；（7）When the battery unit dump energy exceedes
When battery unit rated capacity or the battery cell temperature exceed assigned temperature threshold value, then return to step（5）；（8）Detection electricity
The dump energy of each battery units of Chi Zuzhong, is ranked up from small to large to the dump energy of each battery unit；（9）Judge
Battery unit number, when battery unit number is even number, into step（10）, when battery number is odd number, into step
（16）；（10）CalculateThe charge capacity threshold value of individual battery unit,, its
In,The dump energy of the minimum battery unit of battery dump energy is represented,Represent the small battery of battery dump energy second
The dump energy of unit,Represent the dump energy of the small battery units of battery dump energy 2k；（11）To dump energy compared with
Small preceding k battery cell charging；（12）Charging is kept, and detects whether dump energy surpasses after the battery unit charging
Battery unit specified electric quantity is crossed, when dump energy is not less than battery unit rated capacity after battery unit charging, is then entered
Enter step（13）, when dump energy exceedes battery unit rated capacity after battery unit charging, then into step（14）；
（13）Detect whether the battery cell temperature exceedes assigned temperature threshold value, when the battery cell temperature is not less than assigned temperature
During threshold value, then return to step（12）, when the battery cell temperature exceedes assigned temperature threshold value, then into step（14）；
（14）Detect whether the battery unit charging switching times have reached predetermined number of times, when the charging switching times have reached
During to specified charging switching times, then stop switching of charging and charge to the battery unit, switching times are charged not when described
When reaching specified charging switching times, then into step（15）；（15）Switch the table of comparisons to charging according to battery unit
Battery unit is switched over, after the completion of battery unit switching, return to step（12）；（16）CalculateIndividual battery unit
Charge capacity threshold value,, wherein,Represent the minimum electricity of battery dump energy
The dump energy of pool unit,The dump energy of the small battery unit of battery dump energy second is represented,Battery is represented to remain
The dump energy of battery unit small remaining electricity 2k+1, into step (11).
The battery unit switching table of comparisons is, when battery unit number is even number,, battery unit dump energy
It is followed successively by from small to large, dump energy isThe remaining electricity of battery unit charging switching correspondence
Measure and beBattery unit, dump energy isBattery unit charging switching correspondence dump energy beBattery unit,
Dump energy isBattery unit charging switching correspondence dump energy beBattery unit, the rest may be inferred from small to large,
When battery unit number is odd number, when battery unit number is odd number,, battery unit dump energy from
It is small to being followed successively by greatly, dump energy isThe remaining electricity of battery unit charging switching correspondence
Measure and beBattery unit, dump energy isBattery unit charging switching correspondence dump energy beBattery unit,
Dump energy isBattery unit charging switching correspondence dump energy beBattery unit, the rest may be inferred from small to large, remain
Remaining electricity isBattery unit without charging switch.
When dump energy isBattery unit be with dump energyBattery unit when carrying out charging switching, remaining electricity
Measure and beBattery unit corresponding switch-dividing closure when, then dump energy isThe corresponding switch-dividing of battery unit disconnect,
Dump energy isBattery unit corresponding switch-dividing when disconnecting, then dump energy isThe corresponding switch-dividing of battery unit
Closure, the rest may be inferred, when dump energy isBattery unit be with dump energyBattery unit carry out charging switching
When, dump energy isBattery unit corresponding switch-dividing closure when, then dump energy isCorresponding point of battery unit
Switch off, dump energy isBattery unit corresponding switch-dividing when disconnecting, then dump energy isBattery unit pair
The switch-dividing closure answered.
Implement the large-capacity battery pack charging system of the present invention, have the advantages that, battery unit in battery pack
When electricity is relatively low, charge rate is very fast, and the relatively low battery of prioritizing selection electricity is first charged, and can improve charging effect
Rate, when the relatively low battery charge power of electricity is larger, causes battery temperature rise excessive, reduces the life-span of battery, be in the short time
This, design temperature threshold value so that battery charge temperature realizes safe charging in safe range takes into full account Large Copacity electricity
Pond group charge requirement is using the DC-DC converter created, it is ensured that each element is reliably transported under declared working condition in converter
OK, and reduce the harmonic wave that charger is caused to power network, electric energy is saved, while ensureing charging current and the charging provided for battery
The quality of voltage, further extends the service life of battery.
Brief description of the drawings
Fig. 1 is that large-capacity battery pack charging system configures figure.
Fig. 2 is the circuit theory diagrams of DC-DC converter in charging system.
Fig. 3 is charge control flow chart.
Embodiment
Fig. 1 is that large-capacity battery pack charging system configures figure：In Fig. 1 charging system include master switch 101, rectifier 102,
DC-DC converter 103, controller 104, switch-dividing 105 ~ 108, battery electric quantity checking device, battery temperature detection means
With DC-DC converter detection means, alternating current input power supplying is connected with the one end of master switch 101, the other end of master switch 101 with it is whole
Flow the one end of device 102 to be connected, the other end of rectifier 102 is connected with the one end of DC-DC converter 103, DC-DC converter
103 other ends are connected with switch-dividing 105 ~ 108 respectively, the correspondence of each battery unit 109 ~ 112 one in large-capacity battery pack
For the switch-dividing 105 ~ 108 of charge control, multiple other ends of switch-dividing 105 ~ 108 connect battery unit 109 ~ 112, controller
104 are connected by bus with DC-DC converter 103, are detected for the working condition to DC-DC converter,
And its output control is instructed, controller 104 is connected with battery unit 109 ~ 112, the residue for detecting each battery unit
Electricity and temperature, controller are connected with multiple switch-dividings 105 ~ 108, the break-make for controlling switch-dividing.
Fig. 2 is the circuit theory diagrams of DC dc converter in charging system：DC-DC converter is including direct current just
Input 201, direct current negative input end 202, electric capacity 203, electric capacity 204, switch 205, switch 206, transformer 207, diode
208th, diode 209, diode 210, diode 211, inductance 212, electric capacity 213, direct current positive output end 214, direct current are born
Output end 215, wherein, direct current positive input terminal 201 is connected and direct current negative input end 202 and rectification with rectifier positive output end
Device negative output terminal is connected, and direct current positive input terminal 201 is also connected with electric capacity 203 and 205 one end of switch respectively, and electric capacity 203 is another
End be also connected respectively with the primary side of transformer 207 and the one end of electric capacity 204, the other end of electric capacity 204 respectively with direct current negative input end
202 are connected with 206 one end of switch, and 205 other ends of switch are connected with switch 206 and the primary side other end of transformer 207 respectively, become
The primary side one end of depressor 207 is connected with the anode of diode 208 and the negative electrode of diode 209 respectively, and the primary side of transformer 207 is another
One end is connected with the anode of diode 210 and the negative electrode of diode 211 respectively, the one end of reactor 212 respectively with diode 208
Negative electrode is connected with the negative electrode of diode 210, the other end of reactor 212 respectively with electric capacity 213 and the phase of direct current positive output end 214
Even, anode of the other end of electric capacity 213 respectively with direct current negative output terminal 215, the anode of diode 209, diode 211 is connected,
Direct current positive output end 214 respectively switch-dividing corresponding with each battery unit be connected, direct current negative output terminal 215 respectively with often
The corresponding switch-dividing of individual battery unit is connected.
Fig. 3 is charge control flow chart：Rechargeable battery is selected as follows, when (1) calculates specified charging
The maximum charge amount that interior charger can be provided,, wherein,For charger rated output power value,For
The charging interval specified,For power electricity transformation ratio；（2）Judge that can the maximum charge amount cause all battery units
Man Chong, when the maximum charge amount can cause all battery unit full charge, then into step（3）, when the maximum charge
When amount can not cause all battery unit full charge, then into step（8）；（3）All battery units in battery pack are filled simultaneously
Electricity, keeps charging, and detects whether dump energy exceedes battery unit specified electric quantity after the battery unit charging, when the electricity
When dump energy is not less than battery unit rated capacity after pool unit charging, then into step（4）；（4）Detect the battery list
Whether first temperature exceedes assigned temperature threshold value, when the battery cell temperature is not less than assigned temperature threshold value, then return to step
（3）, when battery cell temperature exceedes assigned temperature threshold value, then into step（5）；（5）Stop charging to the battery unit,
EveryThe battery unit electricity and the battery cell temperature are detected after time,（6）When the battery unit dump energy
During not less than battery unit rated capacity and the battery cell temperature not less than assigned temperature threshold value, then return to step（3）；
（7）When the battery unit dump energy exceedes battery unit rated capacity or the battery cell temperature more than assigned temperature threshold
During value, then return to step（5）；（8）The dump energy of each battery unit in battery pack is detected, to the residue of each battery unit
Electricity is ranked up from small to large；（9）Battery unit number is judged, when battery unit number is even number, into step（10）,
When battery number is odd number, into step（16）；（10）CalculateThe charge capacity threshold value of individual battery unit,, wherein,Represent the residue electricity of the minimum battery unit of battery dump energy
Amount,The dump energy of the small battery unit of battery dump energy second is represented,Represent the small electricity of battery dump energy 2k
The dump energy of pool unit；（11）Preceding k battery cell charging less to dump energy；（12）Charging is kept, and is examined
Survey whether dump energy after the battery unit charging exceedes battery unit specified electric quantity, it is remaining after the battery unit charges
When electricity is not less than battery unit rated capacity, then into step（13）, dump energy exceedes after the battery unit charges
During battery unit rated capacity, then into step（14）；（13）Detect whether the battery cell temperature exceedes assigned temperature threshold
Value, when the battery cell temperature is not less than assigned temperature threshold value, then return to step（12）, when the battery cell temperature is super
When crossing assigned temperature threshold value, then into step（14）；（14）Detect whether the battery unit charging switching times have reached
Predetermined number of times, when the charging switching times, which have reached, specifies charging switching times, then stops filling the battery unit
Electricity and charging switching, when the charging switching times, which are not up to, specifies charging switching times, then into step（15）；（15）Press
The battery unit charged is switched over according to the battery unit switching table of comparisons, after the completion of battery unit switching, return to step
（12）；（16）CalculateThe charge capacity threshold value of individual battery unit,,
Wherein,The dump energy of the minimum battery unit of battery dump energy is represented,Represent the small electricity of battery dump energy second
The dump energy of pool unit,The dump energy of the small battery units of battery dump energy 2k+1 is represented, into step
(11)。
The battery unit switching table of comparisons is, when battery unit number is even number,, battery unit dump energy
It is followed successively by from small to large, dump energy isBattery unit charging switching correspondence dump energy beBattery unit, dump energy isBattery unit charging switching correspondence dump energy beBattery unit, it is remaining
Electricity isBattery unit charging switching correspondence dump energy beBattery unit, the rest may be inferred from small to large, works as electricity
When pool unit number is odd number, when battery unit number is odd number,, battery unit dump energy from it is small to
It is followed successively by greatly, dump energy isBattery unit charging switching correspondence dump energy be
Battery unit, dump energy isBattery unit charging switching correspondence dump energy beBattery unit, dump energy
ForBattery unit charging switching correspondence dump energy beBattery unit, the rest may be inferred from small to large, and dump energy isBattery unit without charging switch.
When dump energy isBattery unit be with dump energyBattery unit when carrying out charging switching, it is remaining
Electricity isBattery unit corresponding switch-dividing closure when, then dump energy isThe corresponding separated shut-off of battery unit
Open, dump energy isBattery unit corresponding switch-dividing when disconnecting, then dump energy isCorresponding point of battery unit
Switch closure, the rest may be inferred, when dump energy isBattery unit be with dump energyBattery unit charged
During switching, dump energy isBattery unit corresponding switch-dividing closure when, then dump energy isBattery unit pair
The switch-dividing answered disconnects, and dump energy isBattery unit corresponding switch-dividing when disconnecting, then dump energy isElectricity
The corresponding switch-dividing closure of pool unit.
The invention is not restricted to the disclosed embodiments and accompanying drawing, it is intended to which covering falls into each of spirit and scope of the present invention
Plant change and deform.
Claims (9)
1. a kind of large-capacity battery pack charging system, it includes：Master switch, rectifier, DC-DC converter, controller, point
Switch, battery electric quantity checking device, battery temperature detection means and DC-DC converter detection means, it is characterised in that：Its
In, master switch is used for the charging AC power that inputs charging system and isolated with rectifier, in case of a fault, deenergization with
System interior element is protected, rectifier is used to charging alternating current being converted into direct current, and DC-DC converter is used for will
The direct current of rectifier output is converted into being adapted to the direct current of large-capacity battery pack charging, and battery electric quantity checking device is used to detect
The electricity of each battery unit in battery pack, and the charge value of detection is inputted to controller, battery temperature detection means is used for
The temperature of each battery unit in battery pack is detected, and the temperature value of detection is inputted to controller, DC-DC converter inspection
The voltage and current that device is used to detect DC-DC converter output is surveyed, and the magnitude of voltage detected and current value are inputted
To controller, the charging that controller is additionally operable to receive user input allows time and the maximum allowable output charging work(of charging system
Rate, and Charging in the charging permission time is calculated according to the charging permission time and the maximum allowable output charge power
System maximum output electricity, controller calculates battery charge requirement always according to the charge value and battery pack total electricity value of the detection
Electricity, controller according to it is described charging the permission time in charging system maximum output electricity, the battery charge requirement electricity and
The temperature of battery unit, selective switching switch-dividing is to select rechargeable battery.
2. large-capacity battery pack charging system according to claim 1, it is characterised in that：Alternating current input power supplying and master switch
One end is connected, and the master switch other end is connected with rectifier one end, and the rectifier other end is connected with DC-DC converter one end,
The DC-DC converter other end is connected with multiple switch-dividing one end respectively, each battery unit pair in large-capacity battery pack
Answering one is used for the switch-dividing of charge control, and the multiple switch-dividing other ends connect battery units, controller by bus and direct current-
DC converter is connected, and is detected for the working condition to DC-DC converter, and its output control is instructed, control
Device processed is connected with battery unit, the electricity for detecting each battery unit, and controller is connected with multiple switch-dividings, for controlling
The break-make of switch-dividing.
3. large-capacity battery pack charging system according to claim 2, it is characterised in that：DC-DC converter includes
Direct current positive input terminal 201, direct current negative input end 202, electric capacity 203, electric capacity 204, switch 205, switch 206, transformer
207th, diode 208, diode 209, diode 210, diode 211, inductance 212, electric capacity 213, direct current positive output end
214th, direct current negative output terminal 215, wherein, direct current positive input terminal 201 is connected with rectifier positive output end and direct current bear it is defeated
Enter end 202 with rectifier negative output terminal to be connected, direct current positive input terminal 201 is also respectively with electric capacity 203 and switching 205 one end phases
Even, the other end of electric capacity 203 is also connected with the primary side of transformer 207 and the one end of electric capacity 204 respectively, the other end of electric capacity 204 respectively with
Direct current negative input end 202 is connected with 206 one end of switch, and 205 other ends of switch are primary with switch 206 and transformer 207 respectively
The side other end is connected, and the primary side one end of transformer 207 is connected with the anode of diode 208 and the negative electrode of diode 209 respectively, becomes
The primary side other end of depressor 207 is connected with the anode of diode 210 and the negative electrode of diode 211 respectively, one end of reactor 212 point
Be not connected with the negative electrode of diode 208 and the negative electrode of diode 210, the other end of reactor 212 respectively with electric capacity 213 and direct current
Positive output end 214 be connected, the other end of electric capacity 213 respectively with direct current negative output terminal 215, the anode of diode 209, diode
211 anode is connected, direct current positive output end 214 respectively switch-dividing corresponding with each battery unit be connected, direct current bear it is defeated
Going out end 215, switch-dividing corresponding with each battery unit is connected respectively.
4. large-capacity battery pack charging system according to claim 3, it is characterised in that：DC-DC converter is guarantor
Card remains to the maximum voltage required by output when DC bus-bar voltage is minimum, and transformer voltage ratio is determined as follows：, in formula：The maximum electricity of output is remained to when minimum for DC bus-bar voltage
Pressure,For diode 208, diode 209, diode 210, diode 211 tube voltage drop,For the minimum electricity of dc bus
Pressure,For primary side umber of turn,For primary side umber of turn.
5. large-capacity battery pack charging system according to claim 4, it is characterised in that：In DC-DC converter by
The uncontrollable rectifier bridge that diode 208, diode 209, diode 210 and diode 211 are constituted carries out parameter as follows
Selection：（1）Voltage：,For the rated operational voltage of rectifier bridge,For
The line voltage of rectifier bridge input；（2）Electric current：,For the nominal operation electricity of rectifier bridge
Stream,For load average electric current.
6. large-capacity battery pack charging system according to claim 5, it is characterised in that：By electricity in DC-DC converter
The output filter circuit that sense 212 and electric capacity 213 are constituted carries out parameter selection as follows：,For transformer secondary output voltage,For DC bus-bar voltage maximum,For transformer voltage ratio,,For DC-DC converter duty cycle of switching,,
For the inductance value of filter circuit,For minimum output current,For switch periods,,For filter
The capacitance of wave circuit,For maximum voltage ripple.
7. large-capacity battery pack charging system according to claim 1, it is characterised in that：As follows to charging electricity
Pond is selected, and (1) calculates the maximum charge amount for specifying that charger can be provided in the charging interval,, its
In,For charger rated output power value,For the specified charging interval,For power electricity transformation ratio；（2）Judge described
Can maximum charge amount make it that all battery units completely fill, when the maximum charge amount can cause all battery unit full charge
When, then into step（3）, when the maximum charge amount can not cause all battery unit full charge, then into step（8）；
（3）All battery units in battery pack are charged simultaneously, charging are kept, and detect that dump energy is after the battery unit charging
It is no to exceed battery unit specified electric quantity, when dump energy is not less than battery unit rated capacity after battery unit charging,
Then enter step（4）；（4）Detect whether the battery cell temperature exceedes assigned temperature threshold value, when the battery cell temperature
During not less than assigned temperature threshold value, then return to step（3）, when battery cell temperature exceedes assigned temperature threshold value, then enter step
Suddenly（5）；（5）Stop charging to the battery unit, everyThe battery unit electricity and the battery list are detected after time
First temperature,（6）When the battery unit dump energy does not surpass not less than battery unit rated capacity and the battery cell temperature
When crossing assigned temperature threshold value, then return to step（3）；（7）When the battery unit dump energy exceedes battery unit rated capacity
Or the battery cell temperature is when exceeding assigned temperature threshold value, then return to step（5）；（8）Detect each battery list in battery pack
The dump energy of member, is ranked up from small to large to the dump energy of each battery unit；（9）Judge battery unit number, when
When battery unit number is even number, into step（10）, when battery number is odd number, into step（16）；（10）CalculateThe charge capacity threshold value of individual battery unit,, wherein,Represent
The dump energy of the minimum battery unit of battery dump energy,Represent the surplus of the small battery unit of battery dump energy second
Remaining electricity,Represent the dump energy of the small battery units of battery dump energy 2k；（11）Preceding k less to dump energy
Individual battery cell charging；（12）Charging is kept, and detects whether dump energy exceedes battery after the battery unit charging
Unit specified electric quantity, when dump energy is not less than battery unit rated capacity after battery unit charging, then into step
（13）, when dump energy exceedes battery unit rated capacity after battery unit charging, then into step（14）；（13）Inspection
Survey whether the battery cell temperature exceedes assigned temperature threshold value, when the battery cell temperature is not less than assigned temperature threshold value
When, then return to step（12）, when the battery cell temperature exceedes assigned temperature threshold value, then into step（14）；（14）Inspection
Survey whether battery unit charging switching times have reached predetermined number of times, when the charging switching times reached it is specified
During charging switching times, then stop switching of charging and charge to the battery unit, when the charging switching times are not up to finger
Surely during charging switching times, then into step（15）；（15）Switch the table of comparisons to the battery list that is charging according to battery unit
Member is switched over, after the completion of battery unit switching, return to step（12）；（16）CalculateThe charging of individual battery unit
Power threshold,, wherein,Represent the minimum battery unit of battery dump energy
Dump energy,The dump energy of the small battery unit of battery dump energy second is represented,Represent battery dump energy
The dump energy of battery unit small 2k+1, into step (11).
8. large-capacity battery pack charging system according to claim 7, it is characterised in that：Battery unit switches the table of comparisons
For, when battery unit number is even number,, battery unit dump energy is followed successively by from small to large, dump energy isBattery unit charging switching correspondence dump energy beBattery
Unit, dump energy isBattery unit charging switching correspondence dump energy beBattery unit, dump energy is
Battery unit charging switching correspondence dump energy beBattery unit, the rest may be inferred from small to large, when battery unit
When number is odd number, when battery unit number is odd number,, battery unit dump energy is from small to large successively
For, dump energy isBattery unit charging switching correspondence dump energy be's
Battery unit, dump energy isBattery unit charging switching correspondence dump energy beBattery unit, dump energy
ForBattery unit charging switching correspondence dump energy beBattery unit, the rest may be inferred from small to large, dump energy
ForBattery unit without charging switch.
9. large-capacity battery pack charging system according to claim 8, it is characterised in that：When dump energy isBattery
Unit is with dump energyBattery unit carry out charging switching when, dump energy isThe corresponding switch-dividing of battery unit
During closure, then dump energy isThe corresponding switch-dividing of battery unit disconnect, dump energy isBattery unit it is corresponding
When switch-dividing disconnects, then dump energy isBattery unit corresponding switch-dividing closure, the rest may be inferred, when dump energy isBattery unit be with dump energyBattery unit carry out charging switching when, dump energy isBattery unit pair
During the switch-dividing closure answered, then dump energy isThe corresponding switch-dividing of battery unit disconnect, dump energy isElectricity
When the corresponding switch-dividing of pool unit disconnects, then dump energy isBattery unit corresponding switch-dividing closure.
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Application publication date: 20170714 |