CN104079017A - Battery management device, power supply system and battery equalization method - Google Patents
Battery management device, power supply system and battery equalization method Download PDFInfo
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Abstract
The invention provides a battery management device, a power supply system and a battery equalization method. The battery management device mainly comprises a battery detection module, an equalization module, a plurality of mode selection modules and a main control module, wherein the battery detection module is used for detecting working condition of each battery in a battery pack; the equalization module is used for charging or discharging the battery pack and other battery packs according to the detected working condition of the battery so that the battery energy of the battery pack and the other battery packs are consistent; each mode selection module is used for conducting a certain battery in the battery pack with the other battery packs for charging or discharging, and the quantity of the mode selection modes is the same to the quantity of the batteries in the battery pack; and the main control module is used for controlling the work of all modules and information interaction between all modules and outside according to the detected working condition of the battery. By the battery management device, the power supply system and the method, effective energy equalization on the battery pack can be achieved, and consistency of power supplies are further improved and the service lives of the power supplies are further prolonged.
Description
Technical field
The present invention relates to a kind of management devices, relate in particular to a kind of cell managing device, power-supply system and battery balanced method.
Background technology
Electric motor cars etc. be take the power supply that equipment that power supply is kinetic energy uses and conventionally by a plurality of power brick (also referred to as battery pack), are formed, for example, the power supply being formed by 5 Battery pack groups, wherein in 4 groups every group by 24 batteries series connection, formed, another group is in series by 18 batteries, altogether forms the power supply being in series by 114 batteries.When electric motor car is worked, described 114 batteries discharge simultaneously, and to provide electric motor car work required electric energy, when electric motor car charges, these 114 batteries charge simultaneously, with energy reserve.But along with the use of electric motor car, these 114 batteries can engender charging and/or the inhomogeneous situation of discharging.This will directly cause some battery to be restarted in overcharging or excessively putting state, thereby reduce the useful life of these batteries, and then the useful life of 114 batteries is inhomogeneous.In battery pack, if having any one battery premature termination life-span in 24 or 18 batteries in a group, this Battery pack needs whole group of replacement, so that the useful life of having reduced whole Battery pack.
So the power brick that power brick in prior art, especially secondary cell form there will be the energy of part battery unbalanced so that affect the situation of the use of whole power supply.Yet along with the development of energy crisis, secondary cell has obtained application more and more widely.Secondary cell for example lithium battery has many advantages, but it still exists some shortcomings.For example, stored energy is few, the performance complexity of connection in series-parallel use, battery electric quantity calculation difficult to estimate, battery etc.So secondary cell needs battery management system (BMS, BATTERY MANAGEMENT SYSTEM) to support the use conventionally, to monitor preferably and to manage battery.BMS can be in battery charge and discharge process, and the parameters such as the terminal voltage of every battery in Real-time Collection battery pack and temperature, charging and discharging currents and power brick total voltage, to prevent the phenomenons such as battery overcharges or excessively put.BMS can provide battery condition in time simultaneously, picks out problematic battery, to keep whole Battery pack reliability of operation and high efficiency.But, in prior art, lack and can carry out equilibrium to the energy between power brick, to improve the battery management system in the useful life of the power supply that power brick forms.
Be understandable that, the statement of this part only provides background information related to the present invention, may form or not form so-called prior art.
Summary of the invention
Technical problem to be solved by this invention is defect unbalanced for the energy content of battery in power brick in prior art so that its life-span is shorter, provide a kind of can the balancing battery bag of automatic quick in the cell managing device of energy of each battery.
The technical solution adopted for the present invention to solve the technical problems is to provide a kind of cell managing device, and it comprises: battery detecting module, for detection of the operating state of each battery in this power brick; Balance module, for according to the operating state of the described battery detecting, this power brick and other power brick being carried out to charge or discharge, so that the energy coincidence of the battery in this power brick and other power brick; Several mode selection modules, each mode selection module is for connecting to carry out charge or discharge by certain battery of power brick and other power brick, and the quantity of mode selection module is identical with number of batteries in this power brick; Main control module, for according to the work of above-mentioned each module of working state control of the described battery detecting and mutual with external information.
In above-mentioned cell managing device, described balance module comprises:
DC/DC transducer, for the transfer of the energy between this power brick and other power brick;
Balance controller, receives the instruction of main control module and according to the instruction of described main control module, controls the work of DC/DC transducer.
In above-mentioned cell managing device, described balance module also comprises equilibrium state collecting unit, for gathering the operating state of DC/DC transducer and the operating state of DC/DC transducer being fed back to balance controller.
In above-mentioned cell managing device, each mode selection module comprises diode parallel with one another and switch.
In above-mentioned cell managing device, described switch is relay.
In above-mentioned cell managing device, the operating state of described battery comprises the operating voltage of battery, operating current and working temperature.
In above-mentioned cell managing device, the operating state of described battery comprises the operating voltage of battery, operating current and working temperature.
In above-mentioned cell managing device, also comprise that described display is electrically connected to described main control module for showing the display of the operating state of power brick.
In above-mentioned cell managing device, also comprise that described display is electrically connected to described main control module for showing the display of the operating state of battery.
In order better to solve the problems of the technologies described above, the present invention also provides a kind of power-supply system, it comprises: the power brick of several series connection, several are for managing the cell managing device of power brick and for controlling the central controller of described several cell managing devices, each power brick is electrically connected to central controller by bus after being electrically connected to a cell managing device, and described cell managing device is any one in above-mentioned cell managing device.
In order better to solve the problems of the technologies described above, the present invention also provides a kind of battery balanced method of power-supply system, and it comprises the following steps successively:
S10, each cell managing device detect the electric weight of each battery in connected power brick and described electric weight are fed back to central controller;
Whether S20, central controller judge power-supply system according to the electric weight of each battery of feedback needs to carry out battery balanced, if so, performs step S30, if not, returns to step S10;
S30, central controller are calculated the average electricity of all batteries and judged which battery according to average electricity according to the voltameter of each battery of feedback needs equilibrium and each battery to reach the required electric weight Q of average electricity;
S40, central controller send balanced instruction to main control module in the cell managing device that needs balanced power brick place, described main control module according to described balanced instruction to needing balanced battery to carry out equilibrium treatment in the power brick at its place, be that described main control module makes the mode selection module and the bus connection that in the power brick at its place, need balanced battery to connect according to above-mentioned balanced instruction, and the balance module that main control module is connected with this main control module according to above-mentioned balanced instruction control is emitted electric weight Q or is absorbed electric weight Q from bus bus.
In above-mentioned battery balanced method, while carrying out equilibrium treatment in step S40, also comprise operating voltage, operating current and operating time while gathering charge or discharge in described balance module, and described balance module regulates the mode of its charge or discharge according to the described operating voltage, operating current and the operating time that gather.
In above-mentioned battery balanced method, while carrying out equilibrium treatment in step S40, also comprise the operating state that shows each battery.
Cell managing device provided by the invention mainly detects the operating state of each battery by battery detecting module, and by balance module and mode selection module under the control of main control module, can automatically effectively make this power brick and other power brick mutually carry out charge or discharge, and then realize the equilibrium of energy between power brick.And can improve consistency and the useful life of the whole power supply of power brick formation.
Accompanying drawing explanation
Fig. 1 is the structural representation that cell managing device provided by the invention is connected with power brick;
Fig. 2 is the structural representation of balance module provided by the invention;
Fig. 3 is the structural representation of mode selection module in an embodiment provided by the invention;
Fig. 4 is the theory diagram that in an embodiment provided by the invention, power-supply system is applied to load;
Fig. 5 is the flow chart of balancing battery in an embodiment provided by the invention;
Fig. 6 a to Fig. 6 c is that in an embodiment provided by the invention, the energy content of battery flows to schematic diagram.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In description of the invention, it will be appreciated that, term " longitudinally ", " laterally ", " on ", orientation or the position relationship of the indication such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than indicate or imply that the device of indication or element must have specific orientation, with specific orientation, construct and operation, therefore can not be interpreted as limitation of the present invention.
Cell managing device provided by the invention, it mainly can make to realize between power brick balancing energy by balance module, several mode selection modules and main control module.
Referring to shown in Fig. 1 to Fig. 6, the invention provides a kind of cell managing device, it is mainly used in managing power brick.Cell managing device mainly comprises: battery detecting module 1, balance module 4, several mode selection modules 3 and main control module 2.Wherein, battery detecting module 1 is connected with power brick, for detecting the operating state of each battery in the power brick being connected with cell managing device, such as the running parameters such as operating voltage, operating current and working temperature that detect battery.Balance module 4 carries out charge or discharge by the power brick being connected with cell managing device (being this power brick) and other power brick under the control of main control module 2, so that carry out energy transfer between power brick and make in power brick the balancing energy of each battery consistent.The corresponding mode selection module 3 of each battery in power brick, therefore the quantity of mode selection module 3 is identical with number of batteries in this power brick.Under the control of main control module 2, whether mode selection module 3 selects certain battery and other power brick to connect, when mode selection module 3 is by after certain battery and the connection of other power brick, certain described battery and other described power brick can be carried out charge or discharge by balance module 4.Main control module 2 is for according to the work of the working state control cell managing device modules of the described battery detecting.So after main control module 2 is connected according to the working state control mode selection module 3 of each battery, main control module 2 is controlled transfer and the equilibrium that balance module 4 makes to carry out between several power brick internal cell energy again.
In a preferred embodiment of the invention, balance module 4 comprises DC/DC transducer 41, for the transfer of the energy between this power brick and other power brick; Balance controller 42, receives the instruction of main control module 2 and according to the instruction of described main control module 2, controls the work of DC/DC transducer.Because mode selection module 3 is by after connecting between certain battery and other power brick, between battery and battery, can not be directly electrically connected and discharges and recharges, so balance module 4 makes to carry out between battery the transfer of energy by DC/DC transducer.Concrete, DC/DC transducer 41 is mainly realized isolation between voltage transitions and battery to realize the transfer of energy between battery.DC/DC transducer is well known to those skilled in the art, therefore its concrete structure does not repeat them here.Balance controller 42 is controlled the conversion regime of DC/DC transducer under the control of main control module 2, for example, controls it and boosts or step-down, and boost or time of step-down.
Because each parts in cell managing device inevitably can be subject to external influence, for example, the running parameter of DC/DC transducer self also can change along with interference such as its aging or extraneous electromagnetism.So preferably, balance module 4 also comprises equilibrium state collecting unit 43, for gathering the operating state of DC/DC transducer and the operating state of DC/DC transducer being fed back to balance controller 42.So balance controller 42 is in conjunction with the working method of the in good time adjustment DC/DC transducer of the operating state of the instruction of main control module 2 and the DC/DC transducer of feedback.For example, equilibrium state collecting unit 43 gathers after the work state informations such as operating voltage, operating current and operating time of DC/DC transducer, operating voltage and pressure rising time when the adaptive change of balance controller 42 DC/DC transducer boosts, and then change the mode discharging and recharging between the battery at DC/DC transducer two ends.Like this, can make to carry out more quickly and accurately between battery energy transfer and equilibrium.
In a preferred embodiment of the invention, each mode selection module 3 comprises diode parallel with one another and switch.Like this, after described certain battery and the connection of other power brick, can avoid a plurality of power supplys mutually to have backflow.For example, when certain energy content of battery is higher, main control module 2 makes diode current flow in mode selection module 3, described certain battery (being other power brick) electric discharge to external world, when certain energy content of battery is on the low side, main control module 2 makes switch closed (diode need to reach its threshold voltage ability conducting) in mode selection module 3, now, diode is in cut-off state, and described in outer bound pair, certain battery charges.So mode selection module 3 makes connected battery be charged respectively and be discharged by two different branch roads by diode in parallel and switch, can effectively reduce the negative effect that backflow and mixed flow are brought.Described switch is generally automatically controlled, and it can be relay or metal-oxide-semiconductor or IGBT pipe.Preferably, switch is relay, and its cost is lower, and the life-span is longer.Further preferably, cell managing device also comprises that, for showing the display of the operating state of power brick, display is electrically connected to described main control module 2.Display can by with power brick in the operating state of each battery show, for user, understand at any time the working condition of each battery, and then can safeguard in time.
Cell managing device provided by the invention can be widely used on the various batteries that need to manage, for example lithium battery.The present invention also provides a kind of power-supply system, it comprises: the power brick of several series connection, several are for managing the cell managing device of power brick and for controlling the central controller of described several cell managing devices, each power brick is electrically connected to central controller by bus after being electrically connected to a cell managing device, described cell managing device be in above-mentioned cell managing device any one.It passes through cell managing device of each power brick corresponding configuration power-supply system provided by the invention, and by each cell managing device of central controller management coordination.
Refer again to shown in Fig. 4 to Fig. 6, the present invention also provides a kind of battery balanced method of power-supply system, and it mainly comprises the following steps:
S10, each cell managing device detect the electric weight of each battery in connected power brick and described electric weight are fed back to central controller; Cell managing device is used for managing connected power brick, the long-term operating state that detects each battery in connected power brick of battery detecting module in cell managing device, for balancing battery, each cell managing device detects the electric weight of each battery in connected power brick and electric weight is fed back to central controller.
Whether S20, central controller judge power-supply system according to the electric weight of each battery of feedback needs to carry out battery balanced, if so, performs step S30, if not, returns to step S10; Wherein, if in power-supply system in power brick the energy of battery inconsistent, central controller is judged as and need to carries out balancing energy to battery;
S30, central controller are calculated the average electricity of all batteries and judged which battery according to average electricity according to the voltameter of each battery of feedback needs equilibrium and each battery to reach the required electric weight Q of average electricity; Concrete, central controller calculates the average electricity of current all batteries, average electricity is the required electric weight having when all batteries reach equilibrium, which battery central controller can judge according to average electricity, and not reach average electricity be which battery needs equilibrium, and can calculate and need balanced battery to reach the required electric weight Q of average electricity, the too high battery of electric weight need to discharge electric weight, and the too low battery of electric weight need to absorb electric weight.
S40, central controller send balanced instruction to main control module in the cell managing device that needs balanced power brick to connect, in the power brick that main control module connects it according to balanced instruction, need balanced battery to carry out equilibrium treatment, central controller is assigned instruction need to carry out the balanced mode that also need to change how many electric weight and change electric weight to which battery in power brick to main control module.In the power brick that main control module connects it according to balanced instruction, need mode selection module and bus that balanced battery connects to connect, and the balance module that main control module is connected with this main control module according to above-mentioned balanced instruction control is emitted electric weight Q or is absorbed electric weight Q from bus to bus.Main control module can be controlled several mode selection modules turn-on bus or turn-on bus together successively, and power brick is successively first to bus electric discharge, and other power brick absorbs electric weight (other power brick being charged) from bus again.Or power brick to bus electric discharge and from bus absorption electric weight, needs balanced electric weight to be pooled to bus place and redistributes the battery to needs charging in battery simultaneously.
The mode that between power brick, energy shifts has multiple.The present invention mainly needs balanced energy and between power brick and power brick, carries out the transfer of energy by judging between power brick and power brick.What deserves to be explained is, whether the energy that judges battery is balanced, can realize by voltage or other parameter of judgement battery, but, this area judges that by whether the electric weight on battery is identical whether the energy content of battery is balanced conventionally, and, between the parameters such as electric weight, voltage, by calculating, be convertible drawing.In addition, although the electric weight on battery is along with the change of operating time can change, but in the short time, on each battery, the variable quantity of electric weight is consistent, so, can be accurately that each is battery balanced to the consistent situation of electric weight with the difference (and each battery reaches the required electric weight Q of average electricity) of average electricity by calculating each battery of a certain moment.Preferably, while carrying out equilibrium treatment in step S40, also comprise operating voltage, operating current and operating time while gathering charge or discharge in described balance module, balance module regulates the mode of self charge or discharge according to the instruction of the described operating voltage, operating current and the operating time that gather and central controller.For example, in cell managing device, equilibrium state collecting unit gathers after the work state informations such as operating voltage, operating current and operating time of DC/DC transducer, operating voltage and pressure rising time when the adaptive change of balance controller DC/DC transducer boosts, and then change the mode discharging and recharging between the battery at DC/DC transducer two ends.Like this, can make to carry out more quickly and accurately between battery energy transfer and equilibrium.More preferably, while carrying out equilibrium treatment in step S40, also comprise by display the operating state of each battery is shown, job informations such as the operating voltage of DC/DC transducer in the cell managing device that the electric weight of each battery, temperature, charging/discharging voltage, this battery are connected, operating time, working temperature shows, and then is more conducive to user and understands power supply situation and safeguard in time.
Refer again to Fig. 3 to embodiment illustrated in fig. 5, in conjunction with Fig. 3, to embodiment illustrated in fig. 5, power-supply system provided by the invention and equalization methods thereof be described as follows:
In this embodiment, each power brick is connected with bus after connecting a cell managing device (being BMU), and bus connection central controller, and for example this power-supply system comprises the power brick of three series connection.Each power brick comprises the battery (battery in power brick can be serial or parallel connection or both mixing) of four series connection, and each cell managing device comprises four mode selection modules, a battery detecting module, a balance module and a main control module.Each balance module comprises a DC/DC transducer, be connected in balance controller between DC/DC transducer and main control module, be connected in the equilibrium state collecting unit between DC/DC transducer and balance controller.Each mode selection module one end connects a battery, and its other end connects DC/DC transducer in balance module, and by DC/DC transducer, this battery is carried out the transfer of energy, and mode selection module is electrically connected to main control module to be controlled by main control module simultaneously.
Battery detecting module in each BMU detects the operating state (comprising the electric weight on each battery) of each battery in the power brick being electrically connected to this BMU and by bus, sends operating state to central controller (be BECU, BECU also can be used for power-supply system and upper level carries out information interaction).For example, BECU calculates and judges first battery in the first power brick and also needs electric weight-20 coulomb (this battery need to discharge 20 coulombs) from 100 coulombs of average electricities, in second power brick, second battery also needs 10 coulombs of electric weight (this battery need to absorb 10 coulombs of electric weight) from 100 coulombs of average electricities, in second power brick, the 3rd battery also needs 10 coulombs of electric weight from 100 coulombs of average electricities, and the 3rd power brick is all in 100 coulombs of average electricities (not needing by balanced battery).Therefore, BECU assigns instruction and carries out battery balanced to the BMU of first power brick and second power brick.The BMU that the first power brick connects controls according to instruction the mode selection module connection that first battery in it connects, for example make diode current flow in mode selection module (and switch is in off-state), this battery carries out energy transfer to bus to external world, and in balance module, balance controller carries out electric weight transfer to this battery according to instruction control DC/DC transducer within 10S, by DC/DC transducer, makes this battery discharge to bus within 10S.And, the BMU that the second power brick connects controls second battery and the 3rd mode selection module that battery connects connection in the second power brick under the instruction of BECU, for example make the switch closed (now diode is in cut-off state) in mode selection module, the electric energy being discharged by the first power brick accumulating in bus charges to second battery and the 3rd battery in the second power brick, so that absorb the electric weight of 10 coulombs in second battery and the 3rd each comfortable 10S of battery in the second power brick.Therefore, the energy coincidence of battery in three power brick after 10S, thus realized the equilibrium of the energy of all batteries.Wherein, the power section that two-way DC transducer is balance module, realizes the charge and discharge maintenance to battery.Input and output voltage and the electric current of equilibrium state collecting unit monitoring bidirectional DC transducer, so that the data of system equalization strategy to be provided, and then balance controller can realize the requirement with adaptive system to the switching of two-way DC transducer mode of operation, for example, can control conversion speed, direction and the power of two-way DC transducer.And, mode selection module, by the parallel connection (even if switch and diode are connected between battery and DC/DC transducer by two different branch roads) of switch and diode, makes charging and electric discharge between battery be realized and can be prevented the backflow that battery is mutual by different branch roads.
Cell managing device is controlled battery balanced strategy can be divided into multiple situation conventionally according to the conforming situation of battery, for example, shown in Fig. 6 a, 6b, 6c, arrow upwards represents that this battery can be used as power supply and outwards exports energy, arrow represents that battery can be used as load and absorbs energy downwards, absorbs and the energy difference of output can be used for balancing battery.When do not need balancing battery under Fig. 6 c state, also just need not there is such energy difference, battery just can be used as the outside output energy of power safety.In Fig. 6 a, a small amount of battery capacity is higher, can improve by realizing consistency to these higher batteries other power brick electric discharge, has a small amount of battery capacity on the low side in Fig. 6 b, by other power brick, these battery chargings is realized to consistency.Regulating and controlling by balance module when Fig. 6 a and two kinds of situations of Fig. 6 b appear in part power brick makes all batteries can reach consistency, just reaches battery balanced requirement when battery reaches the coherency state in Fig. 6 c.
Power-supply system provided by the invention can be widely used in the various equipment that needs electric supply installation, for example, and in the various devices such as the energy-storage system of electrical network and distribution box, electric motor car.In a word, cell managing device provided by the invention, power-supply system and battery balanced method thereof can effectively be managed power brick, phase cross energy between several power brick is shifted, and then realize the balancing energy of several power brick, and then consistency and the useful life of improving the whole power supply of power brick formation, and be convenient to power brick to safeguard.And it can realize battery balanced automatically fast, meanwhile, be convenient to user and understand the residing state of power supply and be convenient to user and in time battery is safeguarded.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
In description of the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. a cell managing device, for managing the power brick with several batteries, is characterized in that, comprising:
Battery detecting module, for detection of the operating state of each battery in this power brick;
Balance module, for according to the operating state of the described battery detecting, this power brick and other power brick being carried out to charge or discharge, so that the energy coincidence of the battery in this power brick and other power brick;
Several mode selection modules, each mode selection module is for connecting to carry out charge or discharge by certain battery of power brick and other power brick, and the quantity of mode selection module is identical with number of batteries in this power brick; And
Main control module, for according to the work of above-mentioned each module of working state control of the described battery detecting and mutual with external information.
2. cell managing device as claimed in claim 1, is characterized in that, described balance module comprises:
DC/DC transducer, for the transfer of the energy between this power brick and other power brick; And
Balance controller, receives the instruction of main control module and according to the instruction of described main control module, controls the work of DC/DC transducer.
3. cell managing device as claimed in claim 2, is characterized in that, described balance module also comprises equilibrium state collecting unit, for gathering the operating state of DC/DC transducer and the operating state of DC/DC transducer being fed back to balance controller.
4. cell managing device as claimed in claim 1, is characterized in that, each mode selection module comprises diode parallel with one another and switch.
5. cell managing device as claimed in claim 4, is characterized in that, described switch is relay.
6. cell managing device as claimed in claim 1, is characterized in that, the operating state of described battery comprises the operating voltage of battery, operating current and working temperature.
7. cell managing device as claimed in claim 3, is characterized in that, the operating state of described DC/DC transducer comprises operating voltage, operating current and the operating time of DC/DC transducer.
8. cell managing device as claimed in claim 1, is characterized in that, also comprises that described display is electrically connected to described main control module for showing the display of the operating state of battery.
9. a power-supply system, it is characterized in that, comprise: the power brick of several series connection, several are for managing the cell managing device of power brick and for controlling the central controller of described several cell managing devices, each power brick is electrically connected to central controller by bus after being electrically connected to a cell managing device, and described cell managing device is any one in claim 1-8.
10. a battery balanced method for power-supply system, is characterized in that, comprises the following steps:
S10, each cell managing device detect the electric weight of each battery in connected power brick and described electric weight are fed back to central controller;
Whether S20, central controller judge power-supply system according to the electric weight of each battery of feedback needs to carry out battery balanced processing, if so, performs step S30, if not, returns to step S10;
S30, central controller are calculated the average electricity of all batteries and judged which battery according to average electricity according to the voltameter of each battery of feedback needs equilibrium and each battery to reach the required electric weight Q of average electricity;
S40, central controller send balanced instruction to main control module in the cell managing device that needs balanced power brick to connect, in the power brick that described main control module connects it according to above-mentioned balanced instruction, need mode selection module and bus that balanced battery connects to connect, and the balance module that main control module is connected with this main control module according to above-mentioned balanced instruction control is emitted electric weight Q or is absorbed electric weight Q from bus to bus.
11. battery balanced methods as claimed in claim 10, it is characterized in that, while carrying out equilibrium treatment in step S40, also comprise operating voltage, operating current and operating time while gathering charge or discharge in described balance module, and described balance module regulates the mode of its charge or discharge according to the described operating voltage, operating current and the operating time that gather.
12. battery balanced methods as claimed in claim 10, is characterized in that, while carrying out equilibrium treatment in step S40, also comprise the operating state that shows each battery.
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| CN107635339A (en) * | 2017-10-27 | 2018-01-26 | 桂林电子科技大学 | A kind of mining illuminating lamp tool of replaceable battery and the charging management method of the light fixture |
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