CN107976639A - A kind of battery pack aging equipment and method - Google Patents
A kind of battery pack aging equipment and method Download PDFInfo
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- CN107976639A CN107976639A CN201711481408.5A CN201711481408A CN107976639A CN 107976639 A CN107976639 A CN 107976639A CN 201711481408 A CN201711481408 A CN 201711481408A CN 107976639 A CN107976639 A CN 107976639A
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- battery pack
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- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of battery pack aging equipment and method.The device includes：Controller, the first two-way DC DC converters, the second two-way DC DC converters, the first battery pack, the second battery pack and AC DC converters；First two-way DC DC converters, the second two-way DC DC converters and AC DC converter are communicated to connect with controller respectively；AC DC converters are electrically connected by dc bus and the first two-way DC DC converters and the second two-way DC DC converters；First two-way DC DC converters and the first battery pack are electrically connected；Second two-way DC DC converters and the second battery pack are electrically connected；Wherein, controller is according to the output voltage of the first battery pack and the second battery pack, AC DC converters are controlled to export predeterminated voltage to dc bus, and the voltage change range and current direction of the first two-way DC DC converters of control and the second two-way DC DC converters, with the real burin-in process stated to the first battery pack and the second battery pack.The device can improve the utilization rate of electric energy in battery pack ageing process, reduce aging cost.
Description
Technical field
The present invention relates to cell degradation technical field, more particularly to a kind of battery pack aging equipment and method.
Background technology
At present, power battery pack after the completion of production, it is necessary to using battery pack aging equipment to battery pack carry out aging at
Reason.Be out of order battery pack or defective batteries group can be investigated by burin-in process, it is also possible to detect the battery of battery pack
Capacity etc..However, in existing battery pack aging equipment, often battery pack power is consumed using resistive load, so not
But electric energy is caused largely to waste, and aging cost is also higher.
The content of the invention
The present invention provides a kind of battery pack aging equipment and method, to improve the utilization of electric energy in battery pack ageing process
Rate, reduces aging cost.
The present invention provides a kind of battery pack aging equipment, it includes：Controller, the first bidirectional DC-DC converter, second
Bidirectional DC-DC converter, the first battery pack, the second battery pack and AC-DC converter；First bidirectional DC-DC converter,
Two bidirectional DC-DC converters and AC-DC converter are communicated to connect with the controller respectively；The AC-DC converter passes through straight
Busbar is flowed to be electrically connected with first bidirectional DC-DC converter and the second bidirectional DC-DC converter；The first two-way DC-
DC converters are also electrically connected with first battery pack；Second bidirectional DC-DC converter also with second battery pack
It is electrically connected；Wherein, the controller is used for according to the output voltage of first battery pack and the second battery pack, described in control
AC-DC converter exports predeterminated voltage, and control first bidirectional DC-DC converter and second pair to the dc bus
To the voltage change range and current direction of DC-DC converter, to realize to the old of first battery pack and the second battery pack
Change is handled.
In battery pack aging equipment provided by the invention, the AC-DC converter is two-way AC-DC converter；It is described
Controller be additionally operable to control the AC-DC converter by the DC conversion on the dc bus into alternating current with feedback best friend
Galvanic electricity net.
In battery pack aging equipment provided by the invention, discharge module is further included；The discharge module and the direct current
Busbar is electrically connected.
In battery pack aging equipment provided by the invention, first bidirectional DC-DC converter and the first battery pack
Number is at least two.
In battery pack aging equipment provided by the invention, second bidirectional DC-DC converter and the second battery pack
Number is at least two.
In battery pack aging equipment provided by the invention, the controller includes the first communication interface；The AC-DC becomes
Parallel operation is communicated to connect by first communication interface and the controller.
In battery pack aging equipment provided by the invention, the controller includes the second communication interface；Described first pair
Communicated to connect to DC-DC converter and the second bidirectional DC-DC converter by second communication interface and the controller.
The present invention also provides a kind of battery pack aging method, the method is applied to any one battery provided by the invention
Group aging equipment；The described method includes：
The output voltage of the first battery pack is obtained by the first bidirectional DC-DC converter；
The output voltage of the second battery pack is obtained by the second bidirectional DC-DC converter；
Predeterminated voltage is determined according to the output voltage of the output voltage of first battery pack and the second battery pack；
Voltage control signal is generated according to the predeterminated voltage, and sends the voltage control signal to AC-DC converter
To control the AC-DC converter to export the predeterminated voltage to dc bus；
First bidirectional DC-DC converter and the second bidirectional DC-DC converter are determined according to default discharge and recharge rule
Current direction；
According to the current direction of the output voltage of first battery pack, predeterminated voltage and the first bidirectional DC-DC converter
Determine the voltage change range of first bidirectional DC-DC converter；
According to the current direction of the output voltage of second battery pack, predeterminated voltage and the second bidirectional DC-DC converter
Determine the voltage change range of second bidirectional DC-DC converter；
First control signal is generated according to the voltage change range of first bidirectional DC-DC converter and current direction,
And second control signal is generated according to the voltage change range and current direction of second bidirectional DC-DC converter；
The first control signal is sent to first bidirectional DC-DC converter and sends the second control signal
To second bidirectional DC-DC converter, to realize the burin-in process to first battery pack and the second battery pack.
In a kind of battery pack aging method provided by the invention, the basis presets discharge and recharge rule and determines described first
The current direction of bidirectional DC-DC converter and the second bidirectional DC-DC converter, including：
The electricity of first battery pack is obtained by first bidirectional DC-DC converter；
The electricity of second battery pack is obtained by second bidirectional DC-DC converter；
If the electricity of first battery pack is more than the electricity of second battery pack, first bi-directional DC-DC is determined
The current direction of converter is from the dc bus to the direction of first battery pack, and is determined described second two-way
The current direction of DC-DC converter is from second battery pack to the direction of the dc bus.
In a kind of battery pack aging method provided by the invention, the first control signal is sent to described the described
After one bidirectional DC-DC converter and the transmission second control signal to second bidirectional DC-DC converter, also wrap
Include：
Monitor the state of charge of first battery pack and the second battery pack；
First battery pack and the second battery are judged according to the state of charge of first battery pack and the second battery pack
Whether group completes a burin-in process；
If first battery pack and the second battery pack complete a burin-in process, to first bidirectional DC-DC converter
Device sends the 3rd control signal so that first bidirectional DC-DC converter carries out opposite direction aging to first battery pack
Processing, and the 4th control signal is sent so that second bidirectional DC-DC converter to second bidirectional DC-DC converter
Device carries out opposite direction burin-in process to second battery pack.
The present invention provides a kind of battery pack aging equipment and method.The controller in the device according to the first battery pack and
The output voltage of second battery pack, control AC-DC converter are two-way to dc bus output predeterminated voltage, and control first
The voltage change range and current direction of DC-DC converter and the second bidirectional DC-DC converter, so as to fulfill to the first battery pack
With the burin-in process of the second battery pack.In the discharge and recharge ageing process of the first battery pack and the second battery pack, charge old
The battery pack of change can be as the load for the battery pack for carrying out electric discharge aging so that electric energy circulates quilt in battery pack aging equipment
Utilize, improve the utilization rate of the energy, reduce aging cost.
Brief description of the drawings
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, general for this area
For logical technical staff, without creative efforts, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram of battery pack aging equipment provided in an embodiment of the present invention；
Fig. 2 is a kind of structure diagram of battery pack aging equipment provided in an embodiment of the present invention；
Fig. 3 is a kind of flow diagram of battery pack aging method provided in an embodiment of the present invention；
Fig. 4 is a kind of idiographic flow schematic diagram of battery pack aging method shown in Fig. 3；
Fig. 5 is a kind of flow diagram of battery pack aging method provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, belongs to the scope of protection of the invention.
In Fig. 1 into Fig. 5, the similar or identical structure of structure is to be given the same reference numerals.
Referring to Fig. 1, Fig. 1 is the electrical block diagram of battery pack aging equipment in the embodiment of the present application.The battery pack
Aging equipment 10 is used to carry out burin-in process to battery pack.Here battery pack can be power battery electricity group.
As shown in Figure 1, the battery pack aging equipment 10 includes controller 11, the first bidirectional DC-DC converter 12, second pairs
To DC-DC converter 13, the first battery pack 14, the second battery pack 15 and AC-DC converter 16.
First bidirectional DC-DC converter 12, the second bidirectional DC-DC converter 13 and AC-DC converter 16 respectively with control
Device 11 processed communicates to connect.
Specifically, which includes the first communication interface 111 and the second communication interface 112.The AC-DC converter 16
Communicated to connect by first communication interface 111 and the controller 11.First bidirectional DC-DC converter 12 and second is two-way
DC-DC converter 13 is communicated to connect by second communication interface 112 and the controller 11.
In one embodiment, which can be CNA communication interfaces.Second communication interface can be
RS485 communication interfaces.Correspondingly, 12 and second bidirectional DC-DC converter 13 of the first bidirectional DC-DC converter is total by communicating
Line 18 is communicated to connect with second communication interface 112.Wherein, which can be RS485 communication bus.
It should be noted that in other embodiments, which can be with
For other kind of communication interface.Correspondingly, the first bidirectional DC-DC converter 12 and the second bidirectional DC-DC converter 13 can also lead to
Cross other kind of mode to communicate to connect with the second communication interface 112, be not particularly limited herein.
The AC-DC converter 16 passes through dc bus 17 and 12 and second bi-directional DC-DC of the first bidirectional DC-DC converter
Converter 13 is electrically connected.The AC-DC converter 16 is also electrically connected with AC network 20, for by the exchange of AC network 20
Electricity changes into direct current so that battery pack aging equipment 10 uses.
First bidirectional DC-DC converter 12 is also electrically connected with first battery pack 14, second bidirectional DC-DC converter
Device 13 is also electrically connected with the second battery pack 15.
When needing to carry out burin-in process to the first battery pack 14 and the second battery pack 15, controller 11 is according to the first battery
The output voltage of 14 and second battery pack 15 of group, control AC-DC converter 16 export predeterminated voltage, and control to dc bus 17
The voltage change range and current direction of the first bidirectional DC-DC converter 12 and the second bidirectional DC-DC converter 13 are made, to realize
To the burin-in process of the first battery pack 14 and the second battery pack 15.
Specifically, which gets the output electricity of the first battery pack 14 by the first bidirectional DC-DC converter 12
Press, and the output voltage of the second battery pack 15 is got by the second bidirectional DC-DC converter 13.Controller 11 is according to first
The output voltage of battery pack 14 and the output voltage of the second battery pack 15 determine predeterminated voltage, are then generated according to the predeterminated voltage
Voltage control signal, and the voltage control signal is exported to AC-DC converter 16 by the first communication interface 111, so that AC-
Direct current of the DC converters 16 according to the voltage control signal by the AC conversion of AC network 20 into predeterminated voltage, and will be pre-
If the direct current electricity output of voltage to dc bus 17, the at this time voltage on dc bus 17 is just adjusted to predeterminated voltage.
Controller 11 determines the first bidirectional DC-DC converter 12 and the second bi-directional DC-DC according to default discharge and recharge rule
The current direction of converter 13.Then, controller 11 is two-way according to the output voltage of the first battery pack 14, predeterminated voltage and first
The current direction of DC-DC converter 12 determines the voltage change range of first bidirectional DC-DC converter 12, and according to
The current direction of the output voltages of two battery packs 15, predeterminated voltage and the second bidirectional DC-DC converter 13 determines this second pair
To the voltage change range of DC-DC converter 13.
Voltage change range and current direction generation first control of the controller 11 further according to the first bidirectional DC-DC converter 12
Signal processed, similarly generates second control signal according to the voltage change range of the second bidirectional DC-DC converter 13 and current direction.
Controller 11 sends the first control signal to first bidirectional DC-DC converter by the second communication interface 112
12 and the second control signal is sent to the second bidirectional DC-DC converter 13, to realize to the first battery pack 14 and the second electricity
The burin-in process of pond group 15.
For example, the output voltage of the first battery pack 14 is 3V, and the output voltage of the second battery pack 15 is 5V.Assuming that controller
11 according to the output voltage 3V of first battery pack 14 and the output voltage 5V of the second battery pack 15 predeterminated voltage determined be 6V.
So controller 11 generates voltage control signal according to predeterminated voltage 6V, then connects the voltage control signal by the first communication
Mouth 111 is sent to AC-DC converter 16.In this way, direct current of the AC-DC converter 16 by the AC conversion of AC network 20 into 6V
Electricity, and export to dc bus 17, the voltage on dc bus 17 is 6V at this time.
Assuming that the controller 11 determines the current direction of the first bidirectional DC-DC converter 12 according to default discharge and recharge rule
For course of discharge, the current direction of second bidirectional DC-DC converter 13 is charging direction.Wherein, which refers to electricity
Flow from the battery pack side of the first bidirectional DC-DC converter 12 and flow to 17 side of dc bus, i.e., first battery pack 14 is outwards discharged.
The charging direction refers to electric current from 17 effluent of dc bus of the second bidirectional DC-DC converter 13 to battery pack side, i.e., this second
Battery pack 15 charges.
Controller 11 is determined further according to the output voltage of first battery pack 14 for 3V, predeterminated voltage 6V and course of discharge
The voltage change range of first bidirectional DC-DC converter 12 is to be converted into 6V from 3V.Similarly, according to second battery pack 15
Output voltage determines the voltage change range of second bidirectional DC-DC converter 13 for 5V, predeterminated voltage 6V and direction of charging
It is to be converted into 5V from 6V.
The voltage change range that controller 11 is converted into 6V according to course of discharge and from 3V generates first control signal, and
Sent by second communication interface 112 to the first bidirectional DC-DC converter 12.Similarly, become according to charging direction and from 6V
The voltage change range generation second control signal of 5V is shifted to, and is sent by second communication interface 112 to the second two-way DC-
DC converters 13.
After the first bidirectional DC-DC converter 12 receives first control signal, it will be controlled according to the first control signal
Its current direction is course of discharge, while the direct current of 14 side of the first battery pack is converted into the direct current of 6V from 3V, and by 6V
Direct current be delivered to dc bus 17.Similarly, will after the second bidirectional DC-DC converter 13 receives second control signal
Its current direction is controlled as charging direction according to the second control signal, while the direct current of 17 side of dc bus is changed from 6V
The second battery pack 15 is filled with into the direct current of 5V, and by the direct current of 5V, is discharged so as to complete the first battery pack 14, the second battery
The ageing process that group 15 charges as load.
In above-mentioned ageing process, the electric energy that the first battery pack 14 is released is used to charge to the second battery pack 15, makes
Obtain energy to be recycled in battery pack aging equipment 10, avoid energy dissipation in ageing process, improve the utilization of the energy
Rate.
In one embodiment, the controller 11 is according to default definite first bidirectional DC-DC converter 12 of discharge and recharge rule
During with the current direction of the second bidirectional DC-DC converter 13, the first bidirectional DC-DC converter 12 can be passed through and obtain the first battery
The electricity of group 14, and the electricity by the second bidirectional DC-DC converter 13 the second battery pack 15 of acquisition.Wherein, first electricity
The electricity of pond group 14 refers to 14 current residual electricity of the first battery pack, and the electricity of second battery pack 15 refers to the second battery pack 15
Current residual electricity.
The controller 11 judges whether the electricity of the first battery pack 14 is more than the electricity of the second battery pack 15.When controller 11
When judging that the electricity of first battery pack 14 is more than the electricity of the second battery pack 15, controller 11 determines the first two-way DC-
The current direction of DC converters 12 is charging direction, the i.e. direction from the battery pack of dc bus 17 to the first 14, and determines to be somebody's turn to do
The current direction of second bidirectional DC-DC converter 13 is course of discharge, i.e., from the second battery pack 15 to the direction of dc bus 17.
Similarly, when controller 11 judges that the electricity of first battery pack 14 is not more than the electricity of the second battery pack 15, controller 11
The current direction for determining first bidirectional DC-DC converter 12 is course of discharge, i.e., from the first battery pack 14 to dc bus 17
Direction, and determine that the current direction of second bidirectional DC-DC converter 13 is charging direction, i.e., from dc bus 17 to the
The direction of two battery packs 15.That is, controller 11 preferentially charges the battery pack more than remaining capacity, can so subtract
Few charge loss, saves electric energy.
It is understood that in other embodiments, controller 11 is according to the definite first two-way DC- of default discharge and recharge rule
The concrete mode of the current direction of 12 and second bidirectional DC-DC converter 13 of DC converters, can also be other modes, herein not
Do concrete restriction.
In one embodiment, which can be two-way AC-DC converter.That is, the AC-DC becomes
Alternating current in AC network 20 can be converted into direct current by parallel operation 16, can also will be straight in battery pack aging equipment 10
Galvanic electricity is converted into alternating current.
For example, when the electricity that controller 11 is judged in the first battery pack 14 is not given out light completely, and the second battery pack 15 is
Through fully charged, in order to save electric energy, controller 11 can send voltage conversion control signal to AC-DC converter 16, so that
AC-DC converter 16 according to the voltage conversion control signal by the electricity on dc bus 17 from converting direct-current power into alternating-current power simultaneously
It is fed back in AC network 20.In this way, the unnecessary electricity in first battery pack 14 can be fed back to AC network 20, with section
Save electric energy.
In one embodiment, as shown in Figure 1, the battery pack aging equipment 10 further includes discharge module 19.The discharge module
19 are electrically connected with dc bus 17.When controller 11 judges that electricity in first battery pack 14 also has remaining, this
Unnecessary electricity in one battery pack 14 can be consumed by discharge module 19.
It should be noted that the discharge module 19 can be with circuit modules such as resistive loads, as long as the discharge module 19 can be with
Unnecessary electric quantity consumption in battery pack aging equipment 10 is fallen, the particular circuit configurations of discharge module 19 are not limited herein
System.
In one embodiment, when the electricity that controller is judged in the first battery pack 14 has been given out light completely, and the second battery
Group 15 underfills electricity, that is to say, that when not enough power supply in first battery pack 14 is with full of the second battery pack 15, controller 11
Charging control signal can be sent to AC-DC converter 16, so that AC-DC converter 16 will be handed over according to the charging control signal
Alternating current in galvanic electricity net 20 is converted into direct current electricity output to dc bus 17, with by AC network 20 to the second battery pack
15 continue to charge, untill the second battery pack 15 is full of.
In one embodiment, as shown in Fig. 2, the circuit structure that Fig. 2 is battery pack aging equipment in the embodiment of the present invention shows
It is intended to.In the battery pack aging equipment 10, the number of 12 and first battery pack 14 of the first bidirectional DC-DC converter is at least
Two.Similarly, the number of 13 and second battery pack 15 of the second bidirectional DC-DC converter can also be at least two.Wherein,
At least two first battery pack 14 can be identical battery pack, or different battery pack, this at least two
Two battery packs 15 can be identical battery pack, or different battery pack.For example, at least two first battery pack 14
Output voltage can be different, the output voltage of at least two second battery pack 15 can also be different.
It should be noted that in the present embodiment, first bidirectional DC-DC converter 12, the second bidirectional DC-DC converter
13rd, the first battery pack 14 and " first " and " second " in the second battery pack 15 describe two devices just for the sake of convenient, should
It is mutually different device that " first " and " second ", which cannot be used for two devices of explanation,.For example, first bidirectional DC-DC converter
12 and second bidirectional DC-DC converter 13 can be identical bidirectional DC-DC converter, or different bi-directional DC-DCs
Converter, 14 and second battery pack 15 of the first battery pack can be identical battery pack, or different battery pack,
It is not particularly limited herein.
In addition, when the bidirectional DC-DC converter in battery pack aging equipment 10 and the number of battery pack are three or more
When a, controller 11 can be combined multiple bidirectional DC-DC converters and battery pack according to the demand of user, with right at the same time
Multiple battery packs carry out discharge and recharge, improve ageing efficiency.For example, as illustrated in fig. 2, it is assumed that in the battery pack aging equipment 10
One bidirectional DC-DC converter 12, the second bidirectional DC-DC converter 13, the number of the first battery pack 14 and the second battery pack 15 are equal
For two.So controller 11 can control two the first battery packs 14 while discharge, and two the second battery packs 15 are at the same time
Charge as load, or one the first battery pack 14 of control and second battery pack 15 are discharged at the same time, another the
One battery pack 14 and another second battery pack 15 as load charge, etc. at the same time.
In one embodiment, which further includes external equipment connectivity port.The controller 11 outside this by setting
Standby connectivity port is communicated to connect with terminal 30.Wherein, which can be the external equipments such as computer.So battery pack aging fills
Interaction can be carried out by terminal 30 and user by putting 10, and for example, controller 11 can get user setting by terminal 30
Ageing process is shown to user's viewing etc. by the parameter of ageing process, or controller 11 by terminal 30.
In one embodiment, which further includes low-tension supply 113.The low-tension supply 113 and AC-DC converter 16
It is electrically connected, for obtaining electric energy from AC-DC converter 16 and powering to controller 11.
In the battery pack aging equipment 10 of the present embodiment, the controller 11 is according to the first battery pack 14 and the second battery pack
15 output voltage, control AC-DC converter 16 export predeterminated voltage, and the first bi-directional DC-DC of control to dc bus 17
The voltage change range and current direction of 12 and second bidirectional DC-DC converter 13 of converter, so as to fulfill to the first battery pack
14 and second battery pack 15 burin-in process.In the discharge and recharge ageing process of the first battery pack 14 and the second battery pack 15, into
The battery pack of row charging aging can be as the load for the battery pack for carrying out electric discharge aging so that electric energy is in battery pack aging equipment
Circulation is utilized in 10, improves the utilization rate of the energy, reduces aging cost.
Referring to Fig. 3, Fig. 3 is a kind of flow diagram of battery pack aging method in the embodiment of the present invention.The battery pack
Aging method is applied to any one battery pack aging equipment in the present invention.The battery pack aging method can be by battery pack aging
Controller in device performs.Since the circuit knot of the battery pack aging equipment is described in previous embodiment in detail
Structure, details are not described herein.
The battery pack aging method includes step S101 to step S109.
S101, the output voltage by the first bidirectional DC-DC converter the first battery pack of acquisition.
S102, the output voltage by the second bidirectional DC-DC converter the second battery pack of acquisition.
S103, according to the output voltage of first battery pack and the output voltage of the second battery pack determine predeterminated voltage.
In one embodiment, controller is getting the output voltage of the output voltage of the first battery pack and the second battery pack
Afterwards, by the output voltage for obtaining the first battery pack and an output voltage larger in the output voltage of the second battery pack, and will
The larger output voltage is multiplied by default weight to obtain predeterminated voltage.
For example, the output voltage of the first battery pack is 3V, and the output voltage of the second battery pack is 5V, then controller obtains
Larger output voltage is just 5V.Assuming that the default weight is 1.2, then the predeterminated voltage that controller is calculated is just 6V.
It is understood that the default weight can also be other numerical value.The default weight can according to the actual requirements into
Row is set.In general, predeterminated voltage is higher than the 10% to 20% of output voltage maximum in battery pack, therefore, Ke Yigen
Default weight is adjusted according to above-mentioned percentage, is not particularly limited herein.
It should be noted that in other embodiments, controller is according to the output voltage and the second battery of the first battery pack
The output voltage of group determines that the mode of predeterminated voltage is not limited to aforesaid way, can also be other modes.For example, in controller
Voltmeter is previously stored with, which includes the correspondence of maximum output voltage and predeterminated voltage.Controller obtains first
A larger output voltage, then larger according to this in the output voltage of battery pack and the output voltage of the second battery pack
Output voltage searches the voltmeter to obtain corresponding predeterminated voltage.
S104, according to the predeterminated voltage generate voltage control signal, and send the voltage control signal to AC-DC become
Parallel operation is to control the AC-DC converter to export the predeterminated voltage to dc bus.
Controller will generate voltage control signal after predeterminated voltage is got according to the predeterminated voltage, and by the voltage
Control signal is sent to AC-DC converter., will be according to the voltage control after AC-DC converter receives the voltage control signal
Signal processed exports predeterminated voltage to dc bus.
S105, according to presetting, discharge and recharge is regular to determine first bidirectional DC-DC converter and the second bidirectional DC-DC converter
The current direction of device.
In one embodiment, as shown in figure 4, Fig. 4 is the idiographic flow schematic diagram of battery pack aging method shown in Fig. 3.Should
Step S105 includes：
S1051, the electricity by first bidirectional DC-DC converter acquisition, first battery pack.
In the present embodiment, the electricity of first battery pack can be remaining capacity in the first battery pack.
S1052, the electricity by second bidirectional DC-DC converter acquisition, second battery pack.
In the present embodiment, the electricity of second battery pack can be remaining capacity in the second battery pack.
If the electricity of S1053, first battery pack is more than the electricity of second battery pack, determine that described first is two-way
The current direction of DC-DC converter be from the dc bus to the direction of first battery pack, and determine described second
The current direction of bidirectional DC-DC converter is from second battery pack to the direction of the dc bus.
When controller judges that the electricity of the first battery pack is more than the electricity of the second battery pack, in order to reduce charging damage
Consumption, improves and saves electric energy, and the current direction for determining first bidirectional DC-DC converter is charging direction by controller, i.e., from straight
Flow busbar to the direction of the first battery pack, and determine the second bidirectional DC-DC converter current direction be course of discharge, i.e., from
Second battery pack is to the direction of dc bus.
If the electricity of S1054, first battery pack is not more than the electricity of second battery pack, described first pair is determined
It is from first battery pack to the direction of the dc bus to the current direction of DC-DC converter, and determines described the
The current direction of two bidirectional DC-DC converters is from the dc bus to the direction of second battery pack.
When controller judges that the electricity of the first battery pack is not more than the electricity of the second battery pack, controller will determine should
The current direction of first bidirectional DC-DC converter is course of discharge, i.e., from the first battery pack to the direction of dc bus, and really
The current direction of fixed second bidirectional DC-DC converter is charging direction, i.e., from dc bus to the direction of the second battery pack.
Certainly, in other embodiments, controller can also be determined using other modes the first bidirectional DC-DC converter and
The current direction of second bidirectional DC-DC converter, is not particularly limited herein.
S106, the electric current according to the output voltage of first battery pack, predeterminated voltage and the first bidirectional DC-DC converter
Direction determines the voltage change range of first bidirectional DC-DC converter.
For example, the output voltage of the first battery pack is 3V, predeterminated voltage 6V, the electricity of first bidirectional DC-DC converter
Direction is flowed for charging direction, then controller determines that the voltage change range of first bidirectional DC-DC converter is to be converted from 6V
To 3V.That is, first bidirectional DC-DC converter needs for the 6V predeterminated voltages on dc bus to be converted into the electricity of 3V
Pressure.
S107, the electric current according to the output voltage of second battery pack, predeterminated voltage and the second bidirectional DC-DC converter
Direction determines the voltage change range of second bidirectional DC-DC converter.
For example, the output voltage of the second battery pack is 5V, predeterminated voltage 6V, the electricity of second bidirectional DC-DC converter
Stream direction is course of discharge, then controller determines that the voltage change range of second bidirectional DC-DC converter is to be converted from 5V
To 6V.That is, second bidirectional DC-DC converter needs the predeterminated voltage into 6V by the voltage conversion of 5V.
S108, generate the first control according to the voltage change range and current direction of first bidirectional DC-DC converter
Signal, and second control signal is generated according to the voltage change range and current direction of second bidirectional DC-DC converter.
S109, send the first control signal to first bidirectional DC-DC converter and send second control
Signal processed is to second bidirectional DC-DC converter, to realize the burin-in process to first battery pack and the second battery pack.
For example, it is course of discharge which controls current direction according to second control signal, and electricity
Pressure excursion is to be changed to 6V from 5V.At this time, which is transmitted to dc bus by electric energy, that is, carries out electric discharge aging
Processing.First bidirectional DC-DC converter controls current direction as charging direction according to first control signal, and voltage change model
Enclose to be changed to 3V from 6V.The first battery pack obtains electric energy from dc bus and carries out charging burin-in process at this time.
In one embodiment, as shown in figure 5, Fig. 5 is the flow diagram of battery pack aging method in the embodiment of the present invention.
After step S109, further include：
The state of charge of S110, monitoring first battery pack and the second battery pack.
Controller by the first bidirectional DC-DC converter and the second bidirectional DC-DC converter come monitor the first battery pack and
The state of charge of second battery pack.
S111, according to the state of charge of first battery pack and the second battery pack judge first battery pack and second
Whether battery pack completes a burin-in process.
Specifically, whether the electricity that controller judges to carry out the battery pack of electric discharge aging discharges, and judges to charge
Whether the electricity of the battery pack of aging is full of.Wherein, the battery pack for carrying out electric discharge aging is to carry out the battery of electric discharge ageing process
Group, the battery pack for carrying out charging aging are to carry out the battery pack of charging ageing process.
The electricity for judging to carry out the battery pack of electric discharge aging when controller has discharged, and carries out the battery pack of charging aging
Electricity have been filled with, controller will judge that first battery pack and the second battery pack complete a burin-in process, and perform step
S112。
The electricity for judging to carry out the battery pack of electric discharge aging when controller does not discharge, and carries out the battery pack of charging aging
Electricity have been filled with, controller will perform step S113.
The electricity for judging to carry out the battery pack of electric discharge aging when controller has discharged, and carries out the battery pack of charging aging
Electricity underfill, controller will perform step S114.
If S112, first battery pack and the second battery pack complete a burin-in process, to first bi-directional DC-DC
Converter sends the 3rd control signal so that first bidirectional DC-DC converter carries out opposite direction to first battery pack
Burin-in process, and the 4th control signal is sent so that second bi-directional DC-DC to second bidirectional DC-DC converter
Converter carries out opposite direction burin-in process to second battery pack.
For example, when controller judges that the electricity of first battery pack has discharged, and the second battery pack has been filled with electricity,
Controller sends the 3rd control signal to the first bidirectional DC-DC converter, so that the first bidirectional DC-DC converter control circuit
Direction is charging direction, and corresponding voltage change range is to be converted into 3V from 6V, is charged so as to fulfill to the first battery pack
Burin-in process, i.e. opposite direction burin-in process.Similarly, which sends the 4th control signal to the second bidirectional DC-DC converter,
So that the second bidirectional DC-DC converter control circuit direction is course of discharge, corresponding voltage change range is to be converted from 5V
To 6V, so as to fulfill electric discharge burin-in process, i.e. opposite direction burin-in process is carried out to the second battery pack.In the opposite direction burin-in process
During, load of first battery pack as the second battery pack, the electric energy which releases carries out for the first battery pack
Charging, realizes and is recycled inside electric energy.
It is understood that the opposite direction burin-in process is for last burin-in process, and for example, the first battery
The first time burin-in process of group is electric discharge burin-in process, then opposite direction burin-in process is just charging burin-in process.
If S113, carry out charging aging battery pack fill with electricity, and carry out electric discharge aging battery pack electricity
Do not discharge, voltage conversion control signal is sent to the AC-DC converter, so that the AC-DC converter is according to the electricity
Changeover control signal is pressed by the converting direct-current power into alternating-current power on dc bus to be fed back to AC network.
In the present embodiment, when carry out charging aging battery pack fill with electricity, and carry out electric discharge aging battery
When the electricity of group does not discharge, the remaining capacity for the battery pack for carrying out electric discharge aging can be converted into alternating current and fed back to by controller
AC network, so as to save electric energy, avoids the waste of electric energy.
Certainly, in other embodiments, can also be by putting when the electricity of battery pack for carrying out electric discharge aging does not discharge
Electric module falls the unnecessary power consumption in dc bus.
If S114, the electricity for the battery pack for carrying out electric discharge aging have discharged, and carry out the electricity of the battery pack of charging aging
Underfill, sends charging control signal, so that the AC-DC converter is believed according to charge control to the AC-DC converter
Number the alternating current in the AC network is converted into direct current electricity output to the dc bus, with to it is described charge it is old
The battery pack of change charges.
In the present embodiment, when the not enough power supply for the battery pack for carrying out electric discharge aging is with full of the battery for carrying out charging aging
During the electricity of group, controller can control AC-DC converter that the alternating current in AC network is converted into direct current, with to carrying out
The battery pack of charging aging continues to charge, so that the battery pack for carrying out charging aging can complete charging ageing process.
In one embodiment, the number of the first bidirectional DC-DC converter in battery pack aging equipment and the first battery pack
It is at least two, the number of the second bidirectional DC-DC converter and the second battery pack is at least two.That is, the electricity
The number of bidirectional DC-DC converter and battery pack is at least three in the group aging equipment of pond.At this time, controller control at least three
The ageing process of a battery pack is similar with the above process.Those skilled in the art can easily obtain according to the above process
To at least three battery packs situation when corresponding control process, details are not described herein.
It should be noted that in other embodiments, after step sl 12, controller can also return to execution step
S110, that is, continue to monitor the state of charge of the first battery pack and the second battery pack, so as to fulfill to the first battery pack and the second electricity
The third time burin-in process of pond group and more times burin-in process, are not limited the number of burin-in process herein.
In addition, it is necessary to illustrate, in the battery pack aging method in the present embodiment, the sequencing between each step
It can be adjusted.For example, step S101 and step S102 can exchange sequencing in Fig. 3.Or in Fig. 4, step
S1051 and step S1052 can exchange sequencing.Or in Fig. 4, the electricity in step S1051 can be with step S101
In output voltage together obtain, i.e. step S1051 and step S101 can be merged into a step, similarly, in step S1052
Electricity can together be obtained with the output voltage in step S102, i.e. step S1052 and step S102 can be merged into one
Step.
Battery pack aging method in the present embodiment, its to battery pack carry out ageing process in, electric energy battery pack it
Between recycled, save electric energy, avoid waste of energy.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replaced
Change, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain subject to.
Claims (10)
- A kind of 1. battery pack aging equipment, it is characterised in that including：It is controller, the first bidirectional DC-DC converter, second two-way DC-DC converter, the first battery pack, the second battery pack and AC-DC converter；First bidirectional DC-DC converter, second pair Communicated to connect respectively with the controller to DC-DC converter and AC-DC converter；The AC-DC converter is female by direct current Line is electrically connected with first bidirectional DC-DC converter and the second bidirectional DC-DC converter；First bi-directional DC-DC becomes Parallel operation is also electrically connected with first battery pack；Second bidirectional DC-DC converter is also electrical with second battery pack Connection；Wherein, the controller is used for the output voltage according to first battery pack and the second battery pack, controls the AC- DC converters export predeterminated voltage to the dc bus, and control first bidirectional DC-DC converter and second two-way The voltage change range and current direction of DC-DC converter, to realize the aging to first battery pack and the second battery pack Processing.
- 2. battery pack aging equipment according to claim 1, it is characterised in that the AC-DC converter is two-way AC-DC Converter；The controller is additionally operable to control the AC-DC converter by the DC conversion on the dc bus into exchange Electricity is to be fed back to AC network.
- 3. battery pack aging equipment according to claim 1, it is characterised in that further include discharge module；The electric discharge mould Block is electrically connected with the dc bus.
- 4. battery pack aging equipment according to claim 1, it is characterised in that first bidirectional DC-DC converter and The number of first battery pack is at least two.
- 5. battery pack aging equipment according to claim 1, it is characterised in that second bidirectional DC-DC converter and The number of second battery pack is at least two.
- 6. battery pack aging equipment according to claim 2, it is characterised in that the controller includes the first communication and connects Mouthful；The AC-DC converter is communicated to connect by first communication interface and the controller.
- 7. battery pack aging equipment according to claim 1, it is characterised in that the controller includes the second communication and connects Mouthful；First bidirectional DC-DC converter and the second bidirectional DC-DC converter pass through second communication interface and the control Device communicates to connect.
- 8. a kind of battery pack aging method, it is characterised in that the method is applied to any one battery in claim 1 to 7 Group aging equipment；The described method includes：The output voltage of the first battery pack is obtained by the first bidirectional DC-DC converter；The output voltage of the second battery pack is obtained by the second bidirectional DC-DC converter；Predeterminated voltage is determined according to the output voltage of the output voltage of first battery pack and the second battery pack；Voltage control signal is generated according to the predeterminated voltage, and sends the voltage control signal to AC-DC converter to control Make the AC-DC converter and export the predeterminated voltage to dc bus；The electric current of first bidirectional DC-DC converter and the second bidirectional DC-DC converter is determined according to default discharge and recharge rule Direction；Determined according to the current direction of the output voltage of first battery pack, predeterminated voltage and the first bidirectional DC-DC converter The voltage change range of first bidirectional DC-DC converter；Determined according to the current direction of the output voltage of second battery pack, predeterminated voltage and the second bidirectional DC-DC converter The voltage change range of second bidirectional DC-DC converter；First control signal, and root are generated according to the voltage change range of first bidirectional DC-DC converter and current direction Second control signal is generated according to the voltage change range and current direction of second bidirectional DC-DC converter；The first control signal is sent to first bidirectional DC-DC converter and sends the second control signal to institute The second bidirectional DC-DC converter is stated, to realize the burin-in process to first battery pack and the second battery pack.
- 9. a kind of battery pack aging method according to claim 8, it is characterised in that the basis presets discharge and recharge rule Determine the current direction of first bidirectional DC-DC converter and the second bidirectional DC-DC converter, including：The electricity of first battery pack is obtained by first bidirectional DC-DC converter；The electricity of second battery pack is obtained by second bidirectional DC-DC converter；If the electricity of first battery pack is more than the electricity of second battery pack, first bidirectional DC-DC converter is determined The current direction of device be from the dc bus to the direction of first battery pack, and determine second bi-directional DC-DC The current direction of converter is from second battery pack to the direction of the dc bus.
- 10. a kind of battery pack aging method according to claim 8, it is characterised in that send first control described Signal processed to first bidirectional DC-DC converter and the transmission second control signal to second bi-directional DC-DC becomes After parallel operation, further include：Monitor the state of charge of first battery pack and the second battery pack；Judge that first battery pack and the second battery pack are according to the state of charge of first battery pack and the second battery pack Burin-in process of no completion；If first battery pack and the second battery pack complete a burin-in process, sent out to first bidirectional DC-DC converter The 3rd control signal is sent so that first bidirectional DC-DC converter carries out at opposite direction aging first battery pack Reason, and the 4th control signal is sent so that second bidirectional DC-DC converter to second bidirectional DC-DC converter Opposite direction burin-in process is carried out to second battery pack.
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| CN201711481408.5A CN107976639A (en) | 2017-12-29 | 2017-12-29 | A kind of battery pack aging equipment and method |
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