CN104767000A - Control method for shifting power between stacked charging battery cells, and circuit thereof - Google Patents
Control method for shifting power between stacked charging battery cells, and circuit thereof Download PDFInfo
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- CN104767000A CN104767000A CN201410004869.3A CN201410004869A CN104767000A CN 104767000 A CN104767000 A CN 104767000A CN 201410004869 A CN201410004869 A CN 201410004869A CN 104767000 A CN104767000 A CN 104767000A
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- Prior art keywords
- switch
- rechargeable battery
- inductor
- battery core
- electricity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a control method for shifting power between stacked charging battery cells, and a circuit thereof. The circuit includes an inductor, a first switch, a second switch and a controller. A charging battery cell with high power and the loop of the inductor are conducted to make the inductor store the power until the current flowing through the inductor reaches a cut-off amount; and a charging battery cell with low power and the loop of the inductor are conducted to make the inductor release t he stored power to the charging battery cell with low power until the current direction flowing through the inductor changes in order to realize balance between the charging battery cells.
Description
Technical field
The control method that the present invention shifts about a kind of electricity and circuit for electricity quantity transferring thereof, particularly about a kind of control method for electricity transfer between stacking rechargeable battery core and circuit for electricity quantity transferring thereof.
Background technology
Rechargeable battery is widely used in many products, such as notebook computer, panel computer, mobile phone, or even large-scale electric motor car.Rechargeable battery generally or series stack in parallel by the rechargeable battery core that multiple specification is identical forms, to reach the object of supply electric energy.Although the source of each rechargeable battery core may be identical, due to some differences having material between each rechargeable battery core or manufacture, cause rechargeable battery (charge or discharge) when in use, have unbalanced phenomenon between rechargeable battery core and occur.The energy imbalance of rechargeable battery core easily causes the reduction of electric quantity of rechargeable battery, and even rechargeable battery core easily shortens useful life because overcharging.Solving rechargeable battery core imbalance problem is the important topic that will face each rechargeable battery development phase.
In order to solve the problem, many known technologies provide balancing circuitry, so that the electricity of the adjacent two rechargeable battery cores of dynamic ground balance.As shown in Figure 1, it is a kind of schematic diagram of traditional many battery balancing circuitry 10 to a method comparatively commonly used, and multiple battery that this balancing circuitry 10 comprises battery 101, battery 102 and a battery 103 are connected in series and a controller 100.The anode of battery 102 is coupled with the Single port 122 of controller 100 by a resistance 112.The negative electrode of battery 102 is coupled with the Single port 121 of controller 100 by a resistance 111.In controller 100, INSHIN path 132 is in parallel with battery 102.This INSHIN path 132 connects an internal shunt control switch 142.Controller 100 controls this internal shunt control switch 142 by a control signal D2.
The anode of battery 101 is coupled with the Single port 121 of controller 100 by a resistance 111.The negative electrode of battery 101 is coupled with the Single port 120 of controller 100 by a resistance 100.In controller 100, INSHIN path 131 is in parallel with battery 101.INSHIN path 131 connects an internal shunt control switch 141.Controller 100 controls this internal shunt control switch 141 by a control signal D1.The anode of battery 103 is coupled with the Single port 123 of controller 100 by a resistance 113.The negative electrode of battery 103 is coupled with the Single port 122 of controller 100 by a resistance 112.In controller 100, INSHIN path 133 is in parallel with battery 103.INSHIN path 133 connects an internal shunt control switch 143.Controller 100 controls internal shunt control switch 143 by a control signal D3.
When having unbalanced situation to occur when between battery, as when in the voltage versus cell group of battery 102, the voltage of other battery is higher, controller 100 conducting internal shunt control switch 142, a branch current (not illustrating) is made to flow through INSHIN path 132, thus make to slow down the charging rate of battery 102, make the voltage of each battery of battery pack trend towards balance.
But the shortcoming of this method is the heat that branch current produces, heat at controller 100 built up inside, likely can damage controller 100.Moreover, in order to balancing battery core, consume the electricity of the higher battery of voltage, reduce the performance of battery pack on the contrary.
Therefore, effectively for control method and the circuit for electricity quantity transferring thereof of electricity transfer between stacking rechargeable battery core, still have and treat that industry makes great efforts research and development.
Summary of the invention
Known rechargeable battery core balancing circuitry also exists the shortcoming producing heat and cause extra power consumption, thus need can control each rechargeable battery core under various functioning condition, all effectively can carry out the balanced action of rechargeable battery core, the circuit for electricity quantity transferring of unlikely consumption larger rechargeable battery core electricity.Namely electricity handover control method provided by the present invention and circuit meet the demand.
In one embodiment of the present of invention, a kind of control method for electricity transfer between stacking rechargeable battery core, comprise following steps: provide an inductor, be connected in parallel with two rechargeable battery cores of connecting but do not electrically conduct respectively, be wherein electrically connected in direct or indirect mode between the positive pole of a rechargeable battery core and the negative pole of another rechargeable battery core and form loop; Setting flows through a cutoff amount of the electric current of this inductor; Determine that two which electricity of rechargeable battery core are higher; The loop of the rechargeable battery core that conducting electricity is higher and this inductor, makes this inductor store electricity, until the electric current flowing through inductor reaches this cutoff amount; And the loop of the lower rechargeable battery core of conducting electricity and this inductor, make this inductor the electricity of storage is released into the lower rechargeable battery core of this electricity, until the sense of current flowing through inductor changes.
Wherein, the electricity of the rechargeable battery core that state of charge is higher is higher.
In another embodiment of the present invention, a kind of circuit for electricity transfer between stacking rechargeable battery core, comprise: an inductor, be connected in parallel with two rechargeable battery cores of connecting but do not electrically conduct respectively, for storing and release electricity, being wherein electrically connected in direct or indirect mode between the positive pole of a rechargeable battery core and the negative pole of another rechargeable battery core and forming loop; One first switch, is connected with this inductor and one of them rechargeable battery core, after receiving a Continuity signal, and the loop of the connected inductor of conducting and rechargeable battery core; One second switch, is connected with this inductor and another rechargeable battery core, after receiving a Continuity signal, and the loop of the connected inductor of conducting or rechargeable battery core; And a controller, comprise: one first comparator, be connected to one first end points and one second end points of the first switch, in order to detect the potential difference of this first switch ends, and export Continuity signal to the first switch; One second comparator, is connected to one the 3rd end points and one the 4th end points of second switch, in order to detect the potential difference at these second switch two ends, and exports Continuity signal to second switch; One first signal source, in order to send this Continuity signal to the first switch; And a secondary signal source, in order to send this Continuity signal to second switch.
Wherein, preset the current cut-off amount that flows through this inductor, when the rechargeable battery core electricity be connected with the first switch is higher, first signal source sends this Continuity signal to the first switch, the first switch open and inductor is made to store electricity, until the electric current flowing through inductor reaches this cutoff amount, then the potential difference at the second comparator detecting second switch two ends, and export Continuity signal to second switch, second switch unlatching and inductor is made the electricity of storage to be released into the lower rechargeable battery core of this electricity, until the sense of current flowing through inductor changes.
Wherein, preset the current cut-off amount that flows through this inductor, when the rechargeable battery core electricity be connected with second switch is higher, secondary signal source sends this Continuity signal to second switch, second switch is opened and inductor storage electricity, until the electric current flowing through inductor reaches this cutoff amount, then the potential difference of the first switch ends detected by the first comparator, and export Continuity signal to the first switch, the first switch open and inductor is made the electricity of storage to be released into the lower rechargeable battery core of this electricity, until the sense of current flowing through inductor changes.
Wherein, this first switch is a N channel metal oxide semiconductcor field effect transistor or P channel metal oxide semiconductcor field effect transistor.
Wherein, this second switch is a N channel metal oxide semiconductcor field effect transistor or P channel metal oxide semiconductcor field effect transistor.
Wherein, the electricity of the rechargeable battery core that state of charge is higher is higher.
Wherein, when the sense of current flowing through inductor changes, the switch ends voltage difference being connected to the lower rechargeable battery core of electricity is zero.
Wherein, when the state of charge difference when between two rechargeable battery cores is less than a minimum difference value, the first switch and second switch are all closed.
The control method of electricity transfer provided by the present invention and circuit thereof, the electric energy that the rechargeable battery core cushioning more electricity by this inductor spreads out of, to fill up the rechargeable battery core of less electricity, to reach the object balanced between rechargeable battery core, and be unlikely to expend unnecessary electricity.
Accompanying drawing explanation
Fig. 1 is the block schematic diagram of known many battery balancing circuitry;
Fig. 2 is the block schematic diagram of circuit for electricity quantity transferring of the present invention;
Fig. 3 describes an inductor in this circuit for electricity quantity transferring and stores electricity;
Fig. 4 describes the electricity that in this circuit for electricity quantity transferring, inductor release stores;
Fig. 5 describes this circuit for electricity quantity transferring and recovers reset condition;
Fig. 6 is the flow chart of electricity handover control method of the present invention;
Fig. 7 describes many group circuit for electricity quantity transferring series connection runnings.
Description of reference numerals: D1-control signal; D2-control signal; D3-control signal; 10-balancing circuitry; 100-controller; 101-battery; 102-battery; 103-battery; 111-resistance; 112-resistance; 113-resistance; 120-port; 121-port; 122-port; 123-port; 131-INSHIN path; 132-INSHIN path; 133-INSHIN path; 141-internal shunt control switch; 142-internal shunt control switch; 143-internal shunt control switch; 20-circuit for electricity quantity transferring; 200-inductor; 301-first switch; 3011-gate; 3012-first end points; 3013-second end points; 302-second switch; 3021-gate; 3022-the 3rd end points; 3023-the 4th end points; 401-first comparator; 402-second comparator; 403-first signal source; 404-secondary signal source; 501-first rechargeable battery core; 502-second rechargeable battery core; 503-the 3rd rechargeable battery core.
Embodiment
The present invention more specifically describes by following embodiment.
Refer to Fig. 2 to Fig. 7.Fig. 2 is the block schematic diagram of circuit for electricity quantity transferring of the present invention, Fig. 3 describes an inductor in this circuit for electricity quantity transferring and stores electricity, Fig. 4 describes the electricity that in this circuit for electricity quantity transferring, inductor release stores, Fig. 5 describes this circuit for electricity quantity transferring and recovers reset condition, Fig. 6 is the flow chart of electricity handover control method of the present invention, and Fig. 7 describes many group circuit for electricity quantity transferring series connection runnings.
One provided by the present invention is used for electricity electric quantity transfered carry circuit 20 between stacking rechargeable battery core, is made up of inductor 200,1 first switch 301, second switch 302 and a controller 400.This inductor 200, in parallel with one first rechargeable battery core 501 and one second rechargeable battery core 502 respectively, its two loops formed are controlled and not conducting with second switch 302 by the first switch 301.The function of inductor 200 is for storing and release electricity.First rechargeable battery core 501 and the second rechargeable battery core 502 are one another in series stacking, and a rechargeable battery set (not illustrating) some electrical power can be provided to originate.The negative pole of the first rechargeable battery core 501 is directly connected with the positive pole of the second rechargeable battery core 502, and the negative pole of the second rechargeable battery core 502 is then connected with the positive pole of the first rechargeable battery core 501 indirectly, forms loop.Said indirect mode herein, can be through a load, and as the electric supply installation of electronic equipment, or charger is connected, to form path.No matter the first rechargeable battery core 501 and the second rechargeable battery core 502 are in power, to charge or without in electricity turnover situation, electricity electric quantity transfered carry circuit provided by the invention and control method can be applied.
First switch 301 is connected with inductor 200 and the first rechargeable battery core 501, can after reception one Continuity signal, the loop of the inductor 200 that conducting connects and the first rechargeable battery core 501.Second switch 302 is identical with the first switch 301 structure, but second switch 302 is connected with inductor 200 and the second rechargeable battery core 502, also can after reception one Continuity signal, the loop of the inductor 200 that conducting connects and the second rechargeable battery core 502.First switch 301 is composed in parallel by a diode and a P channel metal oxide semiconductcor field effect transistor.The startup of one gate 3011 of this P channel metal oxide semiconductcor field effect transistor controlled by this Continuity signal.Continuity signal is a magnitude of voltage.In the same manner, second switch 302 is also composed in parallel by a diode and a P channel metal oxide semiconductcor field effect transistor.The startup of one gate 3021 of this P channel metal oxide semiconductcor field effect transistor also controlled by this Continuity signal.In fact, P channel metal oxide semiconductcor field effect transistor also can be replaced by N channel metal oxide semiconductcor field effect transistor, or the first switch 301 comprises P channel metal oxide semiconductcor field effect transistor, second switch 302 comprises N channel metal oxide semiconductcor field effect transistor, and vice versa.In order to follow-up explanation, in Fig. 2 to Fig. 5 and Fig. 7, the gate of the first switch 301 3011 represents with empty circles with the gate 3021 of second switch 302 and does not start, and solid circles represents and starts.
Controller 400 comprises one first comparator 401,1 second comparator 402,1 first signal source 403 and a secondary signal source 404.First comparator 401 is connected to one first end points 3012 and one second end points 3013 of the first switch 301, in order to detect the potential difference at these the first switch 301 two ends.Second comparator 402 is connected to one the 3rd end points and 3,022 1 the 4th end points 3023 of second switch 302, in order to detect the potential difference at these second switch 302 two ends.First signal source 403 or the first comparator 401 all can send this Continuity signal to the gate 3011 of the first switch 301, and secondary signal source 404 or the second comparator 402 all can send this Continuity signal to the gate 3021 of second switch 302.
In order to the running (control method of electricity transfer) of circuit for electricity quantity transferring 20 is described, refer to the flow chart of Fig. 6.Inductor 200 is connected in parallel with the first rechargeable battery core 501 of series stack and the second rechargeable battery core 502 respectively, but does not open with second switch 302 because of the first switch 301, electrically not conducting.The connection arrow of two rechargeable battery cores is connected to an electric heater (not illustrating), forms loop (S01).Before circuit for electricity quantity transferring 20 operates, setting flows through electric current one cutoff amount (S02) of this inductor 200.The determination of this cutoff amount does not have certain mode, as long as when cutoff amount occurs, the electricity that inductor 200 stores is also in its limits.
Owing to having energy imbalance to occur between the first rechargeable battery core 501 and the second rechargeable battery core 502, therefore the first rechargeable battery core 501 and the second rechargeable battery core 502 whichever electricity higher (S03) must be determined.Many modes can determine the electricity of rechargeable battery core, one preferably example be measure its state of charge.The rechargeable battery core of same size, the electricity that state of charge is higher is higher, and the battery management system of many rechargeable battery cores can reach above-mentioned purpose.The present invention does not limit the mode determining rechargeable battery core electricity.
If when the first rechargeable battery core 501 electricity is higher, the first signal source 403 sends this Continuity signal to the first switch 301, the first switch 301 is opened and inductor 200 stores electricity.Ask for an interview Fig. 3, the more electricity of a part of rechargeable battery core 501 reaches in inductor 200 via the first switch 301 and stores (as shown in arrow direction).The transmission of Continuity signal is until the electric current flowing through inductor 200 reaches this cutoff amount (S04), then the second comparator 402 sends this Continuity signal to second switch 302, second switch 302 is opened and the electricity of storage is released into the second rechargeable battery core 502 of the lower electricity of this tool by inductor 200.Ask for an interview Fig. 4, as shown in arrow direction in figure.The transmission of Continuity signal is until the sense of current flowing through inductor 200 changes (asking for an interview Fig. 5, S05).The sense of current flowing through inductor 200 changes, and namely means that the second rechargeable battery core 502 has absorbed this release electricity (charging), recover discharge condition once again, therefore direct current direction is contrary.Now, be zero across the potential difference at second switch 302 two ends in this conducting loop, this can be found out by the second comparator 402.Otherwise if when the second rechargeable battery core 502 electricity is higher, second switch 302 can first open, inductor 200 first can receive the electricity from the second rechargeable battery core 502, then passes to the first rechargeable battery core 501.It should be noted that the control method of this electricity transfer not necessarily once just can reach object, the present invention allows constantly alternately switching first switch 301 and second switch 302, to reach the balance between rechargeable battery core.Best situation is a minimum difference value of state of charge difference between setting two rechargeable battery cores, such as 1%, when state of charge difference is less than this minimum difference value, the first switch 301 all cuts out with second switch 302.Therefore, the balance between rechargeable battery core under a comparatively economic practice, can be assert and reach balance.
Finally, circuit for electricity quantity transferring of the present invention can alternately be arranged between the rechargeable battery core of series connection, to reach the poised state of whole string rechargeable battery core.Ask for an interview Fig. 7, below the first rechargeable battery core 501 originally and the second rechargeable battery core 502, another series connection one the 3rd rechargeable battery core 503.Another circuit for electricity quantity transferring 20 is connected to the second rechargeable battery core 502 and the 3rd rechargeable battery core 503.The function mode of two circuit for electricity quantity transferrings 20 is identical, and only the circuit for electricity quantity transferring 20 of below is used to balance second rechargeable battery core 502 and the 3rd rechargeable battery core 503.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the appended claim person of defining.
Claims (10)
1., for a control method for electricity transfer between stacking rechargeable battery core, comprise following steps:
One inductor is provided, is connected in parallel with two rechargeable battery cores of connecting but does not electrically conduct respectively, be wherein electrically connected in direct or indirect mode between the positive pole of a rechargeable battery core and the negative pole of another rechargeable battery core and form loop;
Setting flows through a cutoff amount of the electric current of this inductor;
Determine that two which electricity of rechargeable battery core are higher;
The loop of the rechargeable battery core that conducting electricity is higher and this inductor, makes this inductor store electricity, until the electric current flowing through inductor reaches this cutoff amount; And
The loop of the rechargeable battery core that conducting electricity is lower and this inductor, makes this inductor the electricity of storage is released into the lower rechargeable battery core of this electricity, until the sense of current flowing through inductor changes.
2. control method according to claim 1, wherein, the electricity of the rechargeable battery core that state of charge is higher is higher.
3., for a circuit for electricity transfer between stacking rechargeable battery core, comprise:
One inductor, is connected in parallel with two rechargeable battery cores of connecting but does not electrically conduct respectively, for storing and release electricity, being wherein electrically connected in direct or indirect mode between the positive pole of a rechargeable battery core and the negative pole of another rechargeable battery core and forming loop;
One first switch, is connected with this inductor and one of them rechargeable battery core, after receiving a Continuity signal, and the loop of the connected inductor of conducting and rechargeable battery core;
One second switch, is connected with this inductor and another rechargeable battery core, after receiving a Continuity signal, and the loop of the connected inductor of conducting and rechargeable battery core; And a controller, comprise:
One first comparator, is connected to one first end points and one second end points of the first switch, in order to detect the potential difference of this first switch ends, and exports Continuity signal to the first switch;
One second comparator, is connected to one the 3rd end points and one the 4th end points of second switch, in order to detect the potential difference at these second switch two ends, and exports Continuity signal to second switch;
One first signal source, in order to send this Continuity signal to the first switch; And
One secondary signal source, in order to send this Continuity signal to second switch.
4. circuit according to claim 3, wherein preset the current cut-off amount that flows through this inductor, when the rechargeable battery core electricity be connected with the first switch is higher, first signal source sends this Continuity signal to the first switch, the first switch open and inductor is made to store electricity, until the electric current flowing through inductor reaches this cutoff amount, then the potential difference at the second comparator detecting second switch two ends, and export Continuity signal to second switch, second switch unlatching and inductor is made the electricity of storage to be released into the lower rechargeable battery core of this electricity, until the sense of current flowing through inductor changes.
5. circuit according to claim 3, wherein preset the current cut-off amount that flows through this inductor, when the rechargeable battery core electricity be connected with second switch is higher, secondary signal source sends this Continuity signal to second switch, second switch is opened and inductor storage electricity, until the electric current flowing through inductor reaches this cutoff amount, then the potential difference of the first switch ends detected by the first comparator, and export Continuity signal to the first switch, the first switch open and inductor is made the electricity of storage to be released into the lower rechargeable battery core of this electricity, until the sense of current flowing through inductor changes.
6. circuit according to claim 3, wherein this first switch is a N channel metal oxide semiconductcor field effect transistor or P channel metal oxide semiconductcor field effect transistor.
7. circuit according to claim 3, wherein this second switch is a N channel metal oxide semiconductcor field effect transistor or P channel metal oxide semiconductcor field effect transistor.
8. the circuit according to claim 4 or 5, wherein the electricity of the rechargeable battery core that state of charge is higher is higher.
9. the circuit according to claim 4 or 5, wherein when the sense of current flowing through inductor changes, the voltage difference being connected to the switch ends of the lower rechargeable battery core of electricity is zero.
10. circuit according to claim 3, when the state of charge difference wherein when between two rechargeable battery cores is less than a minimum difference value, the first switch and second switch are all closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410004869.3A CN104767000A (en) | 2014-01-06 | 2014-01-06 | Control method for shifting power between stacked charging battery cells, and circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410004869.3A CN104767000A (en) | 2014-01-06 | 2014-01-06 | Control method for shifting power between stacked charging battery cells, and circuit thereof |
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| CN104767000A true CN104767000A (en) | 2015-07-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109301363A (en) * | 2018-08-30 | 2019-02-01 | 上汽通用汽车有限公司 | Battery pack management system, method and storage medium |
| WO2021130104A1 (en) | 2019-12-24 | 2021-07-01 | Covestro Deutschland Ag | Flexible foam |
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| US20090278496A1 (en) * | 2006-06-22 | 2009-11-12 | Fdk Corporation | Series-connected rechargeable cells, series-connected rechargeable cell device, voltage-balance correcting circuit for series-connected cells |
| CN103094956A (en) * | 2011-11-08 | 2013-05-08 | 株式会社丰田自动织机 | Apparatus and method for battery equalization |
| CN103430419A (en) * | 2011-03-11 | 2013-12-04 | Ｅｖｔｄ株式会社 | Balance correction device, power storage system, and transportation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090278496A1 (en) * | 2006-06-22 | 2009-11-12 | Fdk Corporation | Series-connected rechargeable cells, series-connected rechargeable cell device, voltage-balance correcting circuit for series-connected cells |
| CN103430419A (en) * | 2011-03-11 | 2013-12-04 | Ｅｖｔｄ株式会社 | Balance correction device, power storage system, and transportation device |
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| CN109301363A (en) * | 2018-08-30 | 2019-02-01 | 上汽通用汽车有限公司 | Battery pack management system, method and storage medium |
| WO2021130104A1 (en) | 2019-12-24 | 2021-07-01 | Covestro Deutschland Ag | Flexible foam |
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