CN103795094A - Battery energy equalization circuit, method, device and energy storage system - Google Patents
Battery energy equalization circuit, method, device and energy storage system Download PDFInfo
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- CN103795094A CN103795094A CN201210424782.2A CN201210424782A CN103795094A CN 103795094 A CN103795094 A CN 103795094A CN 201210424782 A CN201210424782 A CN 201210424782A CN 103795094 A CN103795094 A CN 103795094A
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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Abstract
An embodiment of the application discloses a battery energy equalization circuit. Each battery of an energy storage battery pack is connected in parallel with a charging subcircuit, a first end of the charging subcircuit is connected with a first output end of a charger, a second output end of the charger is connected with a second end of the charging subcircuit through a switch, a first input end of the charger is connected with a first end of the energy storage battery pack, a second input end of the charger is connected with a second end of the energy storage battery pack, and the charger charges the battery corresponding to the charging subcircuit when the switch in the charging subcircuit is closed. The battery energy equalization circuit in the application can improve the utilization efficiency of energy of the energy storage battery pack.
Description
Technical field
The application relates to circuit field, relates in particular to a kind of energy content of battery equalizing circuit, method, device and energy-storage system.
Background technology
Energy-storage system be a kind of by power storage in energy-storage travelling wave tube, and in needs, discharge the system of electric energy.The source of electric energy can be the electric energy obtaining from electrical network, can be also the energy being produced by solar energy, wind power generation etc.Energy-storage system is connected with power consumption equipment, is power consumption equipment power supply.Especially, energy-storage system can be used as the stand-by power supply of power consumption equipment, also: in the time that electrical network is normal, be power consumption equipment power supply by electrical network, in the time running into the situation of electrical network electric energy undersupply or power failure, energy-storage system is power consumption equipment power supply.
Energy-storage system is mainly made up of energy-storage battery group and battery management system two parts.Energy-storage battery group is used for storage power, and battery management system is used for energy-storage battery group to control, for example, can monitor the voltage of energy-storage battery group, electric current, temperature, carries out charging, the control of discharge of energy-storage battery group; Carry out overvoltage, overcurrent and the overheat protector etc. of energy-storage battery group.In addition, because energy-storage battery group is generally made up of multiple batteries, also need the energy content of battery in energy-storage battery group to carry out equilibrium, to guarantee that battery has unified characteristic.
Energy-storage battery group is combined by some batteries, and stored energy is in battery.As shown in Figure 1, some batteries are combined and are formed described energy-storage battery group by the mode of series and parallel connections.The total voltage that energy-storage battery group externally provides equals the voltage sum of the single battery of series connection, and the total current of energy-storage battery group equals the electric current sum of some Battery packs of parallel connection.The for example energy-storage battery group in Fig. 1 comprises that B organizes battery in parallel, and each Battery pack comprises Y batteries, and the voltage of single battery is X, and, the total voltage that energy-storage battery group externally provides is XY; And the electric current of each Battery pack is A, the total current providing after the parallel connection of B Battery pack is AB.
In the time that energy-storage battery group is charged, because the characteristic of each batteries all can exist certain difference, can cause the energy content of battery of every joint series connection unequal, the battery that energy is high can be to the low battery charging of energy, thereby accelerate the aging of battery, reduce the useful life of energy-storage battery group.Therefore, in energy-storage system, all to carry out equilibrium to the electric weight of battery, allow every batteries energy equate, thereby extend energy-storage battery group so that the overall useful life of energy-storage system.
Existing energy content of battery equalization methods as shown in Figure 1A, to the resistance in parallel of the every batteries in energy-storage battery group, and, for energy-storage battery group arranges battery voltage detector (not shown), this battery voltage detector is for detection of the voltage of every batteries in energy-storage battery group, the voltage of each batteries is offered to controller (not shown), the voltage of determining certain batteries when controller is during higher than the voltage of other batteries, connect the path of this batteries and parallel resistance, allow the electric current of battery flow through the resistance in parallel with it, heating by resistance consumes energy unnecessary battery, until the voltage of this battery and other batteries equates.
But this kind carries out the circuit of energy content of battery equilibrium in energy-storage battery group, need to pass through the unnecessary energy of resistance consumption battery, thereby cause the excess loss of energy in energy-storage battery group, reduce the capacity usage ratio of energy-storage battery group.
Summary of the invention
A kind of charging circuit, energy content of battery equalization methods, controller and energy-storage system are provided in the embodiment of the present application, can have improved the energy utilization efficiency of energy-storage battery group.
The embodiment of the present application provides a kind of energy content of battery equalizing circuit, comprising:
For each cell parallel one charging paths of energy-storage battery group;
Each charging paths comprises: the first end of charging paths is connected with the first output of charger, and the second output of described charger is connected with the second end of this charging paths by switch; The first input end of described charger is connected with the first end of energy-storage battery group, and the second input of described charger is connected with the second end of energy-storage battery group;
The switch of described charger in charging paths is battery charging corresponding to charging paths when closed.
Described charger comprises: coupler and rectifier; Wherein,
The first input end of coupler is as the first input end of charger, and the second input of coupler is as the second input of charger;
The first output of coupler connects the first input end of rectifier, and the second output of coupler connects the second input of rectifier;
The first output of rectifier is as the first output of charger, and the second output of rectifier is as the second output of charger.
Described coupler is realized by coupling transformer.
Described rectifier comprises:
The first input end of rectifier connects the first output of rectifier by the first diode of reversal connection, also connect the second output of rectifier by the second diode;
The second input of rectifier connects the first output of rectifier by the 3rd diode of reversal connection, also connect the second output of rectifier by the 4th diode.
Also comprise:
In all charging paths, the second input of charger all connects the second end of energy-storage battery group by master switch.
The embodiment of the present application also provides a kind of energy content of battery equalization methods, comprising:
Determine the battery that needs charging according to the voltage of each battery in energy-storage battery group;
Control the switch closure in the charging paths that the described battery that need to charge is corresponding, so that the charger in charging paths is the battery charging that needs charging.
The described battery according to the definite needs charging of the voltage of each battery in energy-storage battery group comprises:
Calculate cell voltage mean value according to the voltage of each battery in energy-storage battery group;
The battery that voltage is less than to described mean value is defined as the battery that needs charge.
The described battery according to the definite needs charging of the voltage of each battery in energy-storage battery group comprises:
From the voltage of each battery of energy-storage battery group, determine the voltage of numerical value maximum;
All batteries outside the battery corresponding voltage of this numerical value maximum are defined as needing to the battery of charging.
Before determining according to the voltage of each battery in energy-storage battery group the battery that needs charging, also comprise:
Need to carry out balancing energy to battery according to the voltage of each battery in energy-storage battery group is definite time, control described master switch closure.
Determine that according to the voltage of each battery need to carry out balancing energy to battery comprises:
The voltage of determining each battery in energy-storage battery group is unequal; Or,
Determine that the voltage of at least one battery in energy-storage battery group is not in predeterminated voltage interval.
The embodiment of the present application also provides a kind of energy content of battery balancer, comprising:
Determining unit, for determining the battery that needs charging according to the voltage of each battery of energy-storage battery group;
The first control unit, for controlling the switch closure of the charging paths that the described battery that need to charge is corresponding.
Determining unit comprises:
Computation subunit, for calculating cell voltage mean value according to the voltage of each battery of energy-storage battery group;
First determines subelement, is defined as the battery of needs charging for voltage being less than to the battery of described mean value.
Determining unit comprises:
Second determines subelement, determines the voltage of numerical value maximum for the voltage from each battery of energy-storage battery group;
The 3rd determines subelement, for all batteries outside the battery corresponding voltage of this numerical value maximum being defined as need the battery of charging.
Also comprise:
The second control unit, before determining according to the voltage of each battery of energy-storage battery group the battery that needs charging, need to carry out balancing energy to battery time, controls master switch closure according to the voltage of each battery is definite.
The second control unit specifically for: while determining that the voltage of each battery in energy-storage battery group is unequal, control described master switch closure; Or, determine that the voltage of at least one battery in energy-storage battery group is in the time that predeterminated voltage is not interval, control master switch closure.
The embodiment of the present application also provides a kind of energy-storage system, comprises energy-storage battery group, also comprises: aforesaid energy content of battery equalizing circuit.
Also comprise: battery voltage detector and microprocessor; Wherein,
The corresponding connection in two ends of the battery voltage detector every a pair of input with each battery in energy-storage battery group that carry out voltage detecting; The output of battery voltage detector connects the input of microprocessor; Each output of microprocessor is connected respectively the control end of the switch in each charging paths;
Battery voltage detector, for detection of the voltage of each battery in energy-storage battery group;
Microprocessor, for determine the battery that needs charging according to the voltage of each battery of energy-storage battery group, controls the switch closure in the charging paths that the described battery that need to charge is corresponding.
In the embodiment of the present application, it is each cell parallel one charging paths of energy-storage battery group; Each charging paths comprises: the first end of charging paths is connected with the first output of charger, and the second output of described charger is connected with the second end of this charging paths by switch; The first input end of described charger is connected with the first end of energy-storage battery group, and the second input of described charger is connected with the second end of energy-storage battery group; The switch of described charger in charging paths is battery charging corresponding to charging paths when closed.Thereby, charger in each charging paths is corresponding battery charging by the energy of energy-storage battery group, with respect to prior art, do not have resistance to carry out extra consumption to the energy in energy-storage battery group, thereby reduce the consumption of energy in energy-storage battery group, improved the energy utilization efficiency of energy-storage battery group.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiment of the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is energy-storage battery group structural representation;
Figure 1A is energy content of battery equalizing circuit structure chart of the prior art;
Fig. 2 is the application's energy content of battery equalizing circuit the first embodiment schematic diagram;
Fig. 2 A is the application's energy content of battery equalizing circuit the second embodiment schematic diagram;
Fig. 3 is the application's charger construction schematic diagram;
Fig. 3 A is the application's charger implementation structure example;
Fig. 4 is the application's energy content of battery equalization methods the first embodiment schematic diagram;
Fig. 4 A is the application's energy content of battery equalization methods the second embodiment schematic diagram;
Fig. 5 is the application's energy content of battery balancer the first embodiment schematic diagram;
Fig. 5 A is the application's energy content of battery balancer the second embodiment schematic diagram;
Fig. 6 is the application's energy-storage system structural representation;
Fig. 6 A is the syndeton example of the application's battery voltage detector and microprocessor;
Fig. 6 B is the syndeton schematic diagram of the application's microprocessor and energy content of battery equalizing circuit;
Fig. 6 C is the implementation structure example of the application's battery voltage detector.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out to clear, complete description, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Based on the embodiment in the application, those of ordinary skills are not paying the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
Fig. 2 is the application's energy content of battery equalizing circuit the first embodiment schematic diagram, and this energy content of battery equalizing circuit can be applied to energy-storage battery group, and the energy content of battery in energy-storage battery group is carried out to equilibrium.As shown in Figure 2, this energy content of battery equalizing circuit comprises:
For each cell parallel one charging paths 201 of energy-storage battery group; Concrete, the first end of charging paths 201 connects the first end of these charging paths 201 corresponding batteries, and the second end of charging paths 201 connects the second end of these charging paths 201 corresponding batteries.
Each charging paths 201 can comprise: the first end of charging paths 201 is connected with the first output of charger 2011, and the second output of described charger 2011 is connected with the second end of this charging paths 201 by K switch 1; The first input end of described charger 2011 is connected with the first end A1 of energy-storage battery group, and the second input of described charger 2011 is connected with the second end A2 of energy-storage battery group; Described charger 2011 for being the battery charging of charging paths 201 correspondences in the time that the K switch 1 of charging paths 201 is closed.
Wherein, only show 3 batteries in energy-storage battery group in Fig. 2, and the series connection of 3 batteries, Fig. 2 is only example, and in energy-storage battery group, in concrete number of batteries and energy-storage battery group, battery pack and structure the application do not limit; And, in Fig. 2, only showing 3 charging paths structures that battery is in parallel, the charging circuit structure of other cell parallels is identical therewith, does not repeat here.
Wherein, in the time that the first end of battery is anode, the first end of charging paths 201 is output plus terminal, and the first output of charger 2011 is output plus terminal; When the second end of battery is negative terminal, the second end of charging paths 201 is output negative terminal, and the second output of charger 2011 is output negative terminal; Or,
In the time that the first end of battery is negative terminal, the first output of the first end of charging paths 201 and charger 2011 is output negative terminal, and when the second end of battery is anode, the second end of charging paths 201 and the second end of charger 2011 are output plus terminal.
Same, in the time that the first end of energy-storage battery group is anode, the first input end of charger 2011 is input anode, and the second end of energy-storage battery group is negative terminal, and the second input of charger 2011 is input negative terminal; Or in the time that the first end of energy-storage battery group is negative terminal, the first input end of charger 2011 is input negative terminal, the second end of energy-storage battery group is anode, and the second input of charger 2011 is input anode.
Because the first input end of described charger 2011 is connected with the first end of energy-storage battery group, the second input of described charger 2011 is connected with the second end of energy-storage battery group; Thereby the energy source that charger 2011 is battery charging is in energy-storage battery group.
Under this energy content of battery equalizing circuit, can be in the time that the voltage of battery be less than other cell voltages, open the switch of the corresponding charging paths of battery, be battery charging by the charger in charging paths, and, charger is that the gross energy of use energy-storage battery group is the voltage charging that in energy-storage battery group, voltage is low, thereby can reach energy content of battery equilibrium in energy-storage battery group inside.
And the energy of energy-storage battery group does not consume in whole process, with respect to using resistance to carry out energy content of battery equilibrium in prior art, reduce the energy consumption of energy-storage battery group, improve the energy utilization efficiency of energy-storage battery group.
In addition, each battery in energy-storage battery group has independently charging paths, and the charging paths of some batteries is damaged, and can not affect other charging paths, carries out balancing energy thereby also can not affect other batteries.
Have again, each battery in energy-storage battery group has independently charging paths, thereby the charging paths that can control the even all batteries of multiple batteries in energy-storage battery group is charged to battery simultaneously, carry out balancing energy, thereby the balanced required time of the energy content of battery is shorter, improve the balanced efficiency of the energy content of battery; And this energy content of battery equalizing circuit especially goes for needing under the scene of fast uniform.
Preferably, shown in Fig. 2 A, can master switch K be set for the embodiment of the present application energy content of battery equalizing circuit, whether control energy content of battery equalizing circuit by master switch K works, described master switch K can be arranged between the second input of each charger 2011 and the second end of energy-storage battery group, also: in all charging paths 201, the second input of charger 2011 all connects the second end of energy-storage battery group by master switch K.
Referring to Fig. 3, be a kind of implementation structure schematic diagram of charger in the energy content of battery equalizing circuit shown in Fig. 2 and Fig. 2 A, described charger comprises: coupler 301 and rectifier 302; Wherein,
The first input end of coupler 301, as the first input end of charger, connects the first end of energy-storage battery group, and the second input of coupler 301, as the second input of charger, connects the second end of energy-storage battery group;
The first output of coupler 301 connects the first input end of rectifier 302, and the second output of coupler 301 connects the second input of rectifier 302;
The first output of rectifier 302 is as the first output of charger, the first end of the corresponding battery of connecting charger, and the second output of rectifier 302 is as the second output of charger, the second end connection by described switch with the corresponding battery of charger.
Wherein, coupler 301 is for being retrieved as the energy of battery charging from energy-storage battery group, by the Energy Transfer obtaining to rectifier 302;
Shown in Fig. 3 A, described coupler 301 can be realized by coupling transformer;
Described rectifier 302 can comprise:
The first input end of rectifier 302 connects the first output of rectifier by the first diode D1 of reversal connection, also connect the second output of rectifier 302 by the second diode D2;
The second input of rectifier 302 connects the first output of rectifier 302 by the 3rd diode D3 of reversal connection, also connect the second output of rectifier 302 by the 4th diode D4.
Shown in Fig. 3 and Fig. 3 A, be only the realization example of charger, in actual applications, described charger also can use other charging circuit to realize, and is battery charging as long as can realize the electric energy of use energy-storage battery group.
The embodiment of the present application also provides a kind of energy content of battery equalization methods, can realize the control for aforementioned battery balancing energy circuit; Referring to Fig. 4, the method can comprise:
Step 401: determine the battery that needs charging according to the voltage of each battery in energy-storage battery group;
Step 402: control the switch closure in the charging paths that the described battery that need to charge is corresponding.
Preferably, step 401 can comprise:
Calculate cell voltage mean value according to the voltage of each battery in energy-storage battery group;
The battery that voltage is less than to described mean value is defined as the battery that needs charge.
Or step 401 can comprise:
From the voltage of each battery of energy-storage battery group, determine the voltage of numerical value maximum;
All batteries outside the battery corresponding voltage of this numerical value maximum are defined as needing to the battery of charging.
Certainly step 401 can also realize by additive method in actual applications, for example, set in advance voltage threshold, and the battery that voltage is less than to this voltage threshold is defined as the battery of needs charging etc., does not limit here.
In the time that energy content of battery equalizing circuit uses the structure shown in Fig. 2 A to realize, referring to Fig. 4 A, before step 401, can also comprise: step 400: need to carry out balancing energy to battery according to the voltage of each battery in energy-storage battery group is definite time, control described master switch closure.
Thereby first control master switch closure, start energy content of battery equalizing circuit and start working; Afterwards, can be by controlling the closed and disconnected of switch in each charging paths in step 401 and step 402, be the battery charging of needs charging.
Preferably, describedly determine and need to carry out balancing energy to battery and can comprise according to the voltage of each battery:
The voltage of determining each battery in energy-storage battery group is unequal; Or,
Determine that the voltage of at least one battery in energy-storage battery group is not in predeterminated voltage interval.
Balance control method shown in Fig. 4 and Fig. 4 A, by the control to switch in energy content of battery equalizing circuit, is realized the charging control for battery in energy-storage battery group, makes the battery in energy-storage battery group reach balancing energy.
Corresponding with said method, the embodiment of the present application also provides a kind of energy content of battery balancer, and referring to Fig. 5, this device comprises:
Determining unit 510, for determining the battery that needs charging according to the voltage of each battery of energy-storage battery group;
The first control unit 520, for controlling the switch closure of the charging paths that the described battery that need to charge is corresponding.
Preferably, determining unit 510 can comprise:
Computation subunit, for calculating cell voltage mean value according to the voltage of each battery of energy-storage battery group;
First determines subelement, is defined as the battery of needs charging for voltage being less than to the battery of described mean value.
Or preferably, determining unit 510 can comprise:
Second determines subelement, determines the voltage of numerical value maximum for the voltage from each battery of energy-storage battery group;
The 3rd determines subelement, for all batteries outside the battery corresponding voltage of this numerical value maximum being defined as need the battery of charging.
Preferably, referring to Fig. 5 A, this device can also comprise:
The second control unit 530, before determining according to the voltage of each battery of energy-storage battery group the battery that needs charging, need to carry out balancing energy to battery time, controls master switch closure according to the voltage of each battery is definite.
Preferably, the second control unit 530 specifically can be for: determine when the voltage of each battery in energy-storage battery group is unequal, control described master switch closure; Or, determine that the voltage of at least one battery in energy-storage battery group is in the time that predeterminated voltage is not interval, control master switch closure.
Equalising control device shown in Fig. 5 and Fig. 5 A, by the control to switch in energy content of battery equalizing circuit, is realized the charging control for battery in energy-storage battery group, makes the battery in energy-storage battery group reach balancing energy.
Preferably, described balance control method and equalising control device can be realized by microprocessor.
Or described equalising control device also can be realized by hardware circuit.
In addition, the embodiment of the present application also provides a kind of energy-storage system, referring to Fig. 6, comprises energy-storage battery group 610, also comprises: energy content of battery equalizing circuit 620.Preferably, also comprise battery voltage detector 630 and microprocessor 640.
Wherein, referring to Fig. 6 A, battery voltage detector 630 comprises that at least one pair of carries out the input of voltage detecting, and every a pair of input connects respectively the two ends of battery in energy-storage battery group; Thereby detect respectively the voltage of each battery in energy-storage battery group.
The output of battery voltage detector 630 connects the input of microprocessor 640, by the voltage transmission of each battery detecting to microprocessor 640;
Referring to Fig. 6 B, each output of microprocessor 640 connects respectively the control end of the K switch 1 in each charging paths; In the time that described K switch 2 realizes by triode, the base stage that the control end of described switch is triode, in the time that switch is realized by metal-oxide-semiconductor, the grid that the control end of described switch is metal-oxide-semiconductor; Or described switch also can be realized by the controlled triode with control end.
Preferably, battery voltage detector 630 can, by the voltage amplification of each battery in energy-storage battery group, be that digital signal sends to microprocessor 640 by the voltage transitions after amplifying; Now, described battery voltage detector 630 can be realized by the operational amplifier group described in Fig. 6 C and A/D converter, and the concrete circuit of realizing can, with reference to battery voltage detection circuit of the prior art, not repeat here.
In energy-storage system shown in Fig. 6, for each battery arranges respectively charger, can be in the time that the voltage of battery be less than other cell voltages, open the switch of the corresponding charging circuit of battery, be battery charging by charger, and charger is that the gross energy of use energy-storage battery group is the voltage charging that in energy-storage battery group, voltage is low, thereby can reach energy content of battery equilibrium in energy-storage battery group inside.
Preferably, described microprocessor 640 can be realized by the structure of the energy content of battery balancer in Fig. 5 and Fig. 5 A.
And the energy of energy-storage battery group does not consume in whole process, with respect to using resistance to carry out energy content of battery equilibrium in prior art, reduce the energy consumption of energy-storage battery group, improve the energy utilization efficiency of energy-storage battery group.
In addition, each battery in energy-storage battery group has independently charging paths, and the charging paths of some batteries is damaged, and can not affect other charging paths, thereby also can not affect the portfolio effect of other batteries.
Have again, each battery in energy-storage battery group has independently charging paths, thereby the charging paths that can control the even all batteries of multiple batteries in energy-storage battery group is charged to battery simultaneously, carry out balancing energy, thereby the balanced required time of the energy content of battery is shorter, improve the balanced efficiency of the energy content of battery; And this energy content of battery equalizing circuit especially goes for needing under the scene of fast uniform.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually referring to, what each embodiment stressed is and the difference of other embodiment.Especially,, for system embodiment, because it is substantially similar in appearance to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Above-described the application's execution mode, does not form the restriction to the application's protection range.The modification done within any spirit in the application and principle, be equal to and replace and improvement etc., within all should being included in the application's protection range.
Claims (18)
1. an energy content of battery equalizing circuit, is characterized in that, comprising:
For each cell parallel one charging paths of energy-storage battery group;
Each charging paths comprises: the first end of charging paths is connected with the first output of charger, and the second output of described charger is connected with the second end of this charging paths by switch; The first input end of described charger is connected with the first end of energy-storage battery group, and the second input of described charger is connected with the second end of energy-storage battery group;
The switch of described charger in charging paths is battery charging corresponding to charging paths when closed.
2. energy content of battery equalizing circuit according to claim 1, is characterized in that, described charger comprises: coupler and rectifier; Wherein,
The first input end of coupler is as the first input end of charger, and the second input of coupler is as the second input of charger;
The first output of coupler connects the first input end of rectifier, and the second output of coupler connects the second input of rectifier;
The first output of rectifier is as the first output of charger, and the second output of rectifier is as the second output of charger.
3. energy content of battery equalizing circuit according to claim 2, is characterized in that, described coupler is realized by coupling transformer.
4. according to the energy content of battery equalizing circuit described in claim 2 or 3, it is characterized in that, described rectifier comprises:
The first input end of rectifier connects the first output of rectifier by the first diode of reversal connection, also connect the second output of rectifier by the second diode;
The second input of rectifier connects the first output of rectifier by the 3rd diode of reversal connection, also connect the second output of rectifier by the 4th diode.
5. according to the energy content of battery equalizing circuit described in claim 1 to 4 any one, it is characterized in that, also comprise:
In all charging paths, the second input of charger all connects the second end of energy-storage battery group by master switch.
6. an energy content of battery equalization methods, is characterized in that, comprising:
Determine the battery that needs charging according to the voltage of each battery in energy-storage battery group;
Control the switch closure in the charging paths that the described battery that need to charge is corresponding, so that the charger in charging paths is the battery charging that needs charging.
7. method according to claim 6, is characterized in that, the described battery according to the definite needs charging of the voltage of each battery in energy-storage battery group comprises:
Calculate cell voltage mean value according to the voltage of each battery in energy-storage battery group;
The battery that voltage is less than to described mean value is defined as the battery that needs charge.
8. method according to claim 6, is characterized in that, the described battery according to the definite needs charging of the voltage of each battery in energy-storage battery group comprises:
From the voltage of each battery of energy-storage battery group, determine the voltage of numerical value maximum;
All batteries outside the battery corresponding voltage of this numerical value maximum are defined as needing to the battery of charging.
9. according to the method described in claim 6 to 8 any one, it is characterized in that, before determining according to the voltage of each battery in energy-storage battery group the battery that needs charging, also comprise:
Need to carry out balancing energy to battery according to the voltage of each battery in energy-storage battery group is definite time, control described master switch closure.
10. method according to claim 9, is characterized in that, determines that according to the voltage of each battery need to carry out balancing energy to battery comprises:
The voltage of determining each battery in energy-storage battery group is unequal; Or,
Determine that the voltage of at least one battery in energy-storage battery group is not in predeterminated voltage interval.
11. 1 kinds of energy content of battery balancers, is characterized in that, comprising:
Determining unit, for determining the battery that needs charging according to the voltage of each battery of energy-storage battery group;
The first control unit, for controlling the switch closure of the charging paths that the described battery that need to charge is corresponding.
12. devices according to claim 11, is characterized in that, determining unit comprises:
Computation subunit, for calculating cell voltage mean value according to the voltage of each battery of energy-storage battery group;
First determines subelement, is defined as the battery of needs charging for voltage being less than to the battery of described mean value.
13. devices according to claim 11, is characterized in that, determining unit comprises:
Second determines subelement, determines the voltage of numerical value maximum for the voltage from each battery of energy-storage battery group;
The 3rd determines subelement, for all batteries outside the battery corresponding voltage of this numerical value maximum being defined as need the battery of charging.
14. according to claim 11 to the device described in 13 any one, it is characterized in that, also comprises:
The second control unit, before determining according to the voltage of each battery of energy-storage battery group the battery that needs charging, need to carry out balancing energy to battery time, controls master switch closure according to the voltage of each battery is definite.
15. devices according to claim 14, is characterized in that, the second control unit specifically for: while determining that the voltage of each battery in energy-storage battery group is unequal, control described master switch closure; Or, determine that the voltage of at least one battery in energy-storage battery group is in the time that predeterminated voltage is not interval, control master switch closure.
16. 1 kinds of energy-storage systems, is characterized in that, comprise energy-storage battery group, also comprise: the energy content of battery equalizing circuit described in claim 1 to 5 any one.
17. systems according to claim 16, is characterized in that, also comprise: battery voltage detector and microprocessor; Wherein,
The corresponding connection in two ends of the battery voltage detector every a pair of input with each battery in energy-storage battery group that carry out voltage detecting; The output of battery voltage detector connects the input of microprocessor; Each output of microprocessor is connected respectively the control end of the switch in each charging paths;
Battery voltage detector, for detection of the voltage of each battery in energy-storage battery group;
Microprocessor, for determine the battery that needs charging according to the voltage of each battery of energy-storage battery group, controls the switch closure in the charging paths that the described battery that need to charge is corresponding.
18. systems according to claim 17, is characterized in that, described microprocessor comprises the device described in claim 11 to 15 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210424782.2A CN103795094A (en) | 2012-10-30 | 2012-10-30 | Battery energy equalization circuit, method, device and energy storage system |
| PCT/CN2013/085368 WO2014067393A1 (en) | 2012-10-30 | 2013-10-17 | Circuit, method, device, and energy storage system for balancing battery energy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210424782.2A CN103795094A (en) | 2012-10-30 | 2012-10-30 | Battery energy equalization circuit, method, device and energy storage system |
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| CN103795094A true CN103795094A (en) | 2014-05-14 |
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| CN201210424782.2A Pending CN103795094A (en) | 2012-10-30 | 2012-10-30 | Battery energy equalization circuit, method, device and energy storage system |
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| CN (1) | CN103795094A (en) |
| WO (1) | WO2014067393A1 (en) |
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| CN105406578A (en) * | 2015-12-18 | 2016-03-16 | 泗阳蓝阳托盘设备科技有限公司 | Photovoltaic charging circuit of series battery stack |
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| CN110077283B (en) * | 2019-03-28 | 2020-07-07 | 清华大学 | Electric automobile control method |
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| CN101051761A (en) * | 2007-02-12 | 2007-10-10 | 吕征宇 | Accumulator charger based on high frequency bus |
| CN101467328A (en) * | 2006-06-15 | 2009-06-24 | Sk能源株式会社 | Charge equalization apparatus |
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| CN101467328A (en) * | 2006-06-15 | 2009-06-24 | Sk能源株式会社 | Charge equalization apparatus |
| CN101051761A (en) * | 2007-02-12 | 2007-10-10 | 吕征宇 | Accumulator charger based on high frequency bus |
| CN202978315U (en) * | 2012-10-30 | 2013-06-05 | 恩力能源科技（南通）有限公司 | Battery energy equalization circuit, battery energy equalization device and energy storage system |
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| WO2014067393A1 (en) | 2014-05-08 |
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