CN204156045U - A kind of intelligent battery and electric motor car - Google Patents

A kind of intelligent battery and electric motor car Download PDF

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Publication number
CN204156045U
CN204156045U CN201420439301.XU CN201420439301U CN204156045U CN 204156045 U CN204156045 U CN 204156045U CN 201420439301 U CN201420439301 U CN 201420439301U CN 204156045 U CN204156045 U CN 204156045U
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China
Prior art keywords
battery
single lattice
lattice storage
management module
storage battery
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CN201420439301.XU
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Chinese (zh)
Inventor
周明明
蒋林林
徐伟良
刘孝伟
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Chaowei Power Supply Co Ltd
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Chaowei Power Supply Co Ltd
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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
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • 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
    • H01M10/4285—Testing apparatus
    • 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
    • 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
    • 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
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
    • 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
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model discloses a kind of intelligent battery and electric motor car, this intelligent battery comprises the batteries be composed in series by several single lattice storage batterys, described single lattice storage battery comprises battery management module, current sense components and battery terminal, described battery terminal is connected with described current sense components and described battery management module, the magnet ring that described current sense components comprises current sensor and is equipped with current sensor, described battery management module is arranged on a cover plate or the side of single lattice accumulator housing.The utility model carries out by the wireless communication module be arranged on each single lattice storage battery the communication detecting data between each single lattice storage battery, form a WLAN (wireless local area network), facilitate the battery management module on each single lattice storage battery transmit data by wireless communication module and carry out the comparison of mutual discharge and recharge degree.

Description

A kind of intelligent battery and electric motor car
Technical field
The utility model relates to and a kind ofly can realize wireless telecommunications between single lattice storage battery and can carry out the intelligent battery of Real-Time Monitoring adjustment charge and discharge process and use the electric motor car of this battery.
Background technology
The terminal voltage of the single lattice storage battery in a usual lead-acid batteries is about 2 volts, if the cell voltage that needs one are higher, and such as conventional 6 volts, 8 volts, 12 volts etc., then will by single lattice storage battery series connection of more piece to meet power reguirements.But owing to there are differences between single lattice storage battery, can cause two problems, can cause a certain single lattice accumulator super-charge during first charging, it two can cause a certain single lattice storage battery to cross to put when being electric discharges, above two problems all can affect the balance of whole batteries work, there is potential safety hazard.For this reason, also have technical staff to devise battery management module and batteries charge status is monitored, but monitoring is only carried out for whole batteries, still cannot solve the difference problem between single lattice storage battery.
Utility model content
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of intelligent battery, comprise the batteries be composed in series by several single lattice storage batterys, it is characterized in that: described single lattice storage battery comprises battery management module, current sense components and battery terminal, described battery terminal is connected with described current sense components and described battery management module, the magnet ring that described current sense components comprises current sensor and is equipped with current sensor, described battery management module is arranged on a cover plate or the side of single lattice accumulator housing.
Preferably, described current sensor is located in the breach of magnet ring, and described magnet ring is nested with on battery terminal.
Preferably, each single lattice storage battery is provided with an end cover for battery cells, and described end cover for battery cells is provided with the sensor recess placing described current sensor.
Preferably, be provided with bottom outlet bottom described sensor recess, battery terminal is connected with the current sense components be arranged in sensor recess through described bottom outlet.
Preferably, described current sensor is Hall current sensor, be provided with one week shirt rim at sensor recess bottom outlet periphery, surround a magnet ring groove bottom the perisporium of described shirt rim and sensor recess and sensor recess, the magnet ring be equipped with current sensor is placed in magnet ring groove.
Preferably, be also provided with wireless communication module in described each single lattice storage battery, the wireless communication module of each single lattice storage battery intercoms mutually.
Preferably, described battery management module comprises microcontroller and equalizing circuit, and described equalizing circuit connects the battery terminal of single lattice storage battery, and described equalizing circuit connects microcontroller, and described microcontroller connects described current sensor.
Preferably, at batteries outsourcing one housing, described housing is provided with hole, and the battery management module on each single lattice storage battery is connected to by the hole on housing in the display unit outside housing, and described display unit is arranged on housing.
Preferably, described end cover for battery cells is provided with a mounting groove, described mounting groove is stamped a cover plate, and described battery management module is arranged on described cover plate or covers on the cover plate of exhaust valve port.
In addition, the utility model additionally provides a kind of electric motor car, and this electric motor car uses above-mentioned intelligent battery.
After adopting technique scheme, the utility model tool has the following advantages:
The communication detecting data between each single lattice storage battery is carried out by the wireless communication module be arranged on each single lattice storage battery, form a WLAN (wireless local area network), the battery management module on each single lattice storage battery is facilitated to transmit data by wireless communication module and carry out the comparison of mutual discharge and recharge degree, to control the balance of each single lattice storage battery, and by the Internet by the transfer of data of each single lattice storage battery to server, be convenient to the monitoring of server to each single storage battery in batteries, and the control to whole batteries.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the utility model principle schematic;
Fig. 2 is the A place partial enlarged drawing of Fig. 1;
Fig. 3 is the B place partial enlarged drawing of Fig. 1;
Fig. 4 is battery pack structure schematic diagram.
Embodiment
See Fig. 1, a kind of intelligent wireless storage battery, comprise the batteries be composed in series by several single lattice storage batterys 1, the battery terminal 11 of described single lattice storage battery 1 connects the transducer detecting battery parameter separately, transducer connects battery management module 6, the transfer of data that transducer gathers is to battery management module 6, described battery management module 6 connects wireless communication module 5, each single lattice storage battery 1 is provided with an end cover for battery cells 2, described end cover for battery cells 2 is provided with a mounting groove 3, be provided with in described mounting groove 3 and be interconnected battery management module 6 and wireless communication module 5, and the wireless communication module of each single lattice storage battery 1 intercoms mutually, the wireless communication module intercomed mutually forms a WLAN (wireless local area network) 9, and on single lattice storage battery, be also provided with internet communication port, can from internet communication port connected with network cable 10 through the Internet to the server of outside.Transducer includes voltage sensor, current sensor and temperature sensor, the voltage of each single lattice storage battery is detected by described transducer, electric current and temperature signal data, and judge the operation that single lattice storage battery is current and health status, above-mentioned analysis judges to be undertaken by the battery management module 6 on end cover for battery cells 2, battery management module carries out the comparison of single lattice storage battery each other by the WLAN (wireless local area network) 9 be made up of the wireless communication module on each single lattice storage battery, concrete, by the transducer of described detection battery parameter current sensor detect the electric current of each single lattice storage battery, described battery management module carries out battery capacity calculating by the integral operation of electric current, and judge the operation that single lattice storage battery is current and health status, by the voltage of each single lattice storage battery of voltage sensor senses of the transducer of described detection battery parameter, set the reference voltage of each single lattice storage battery by the temperature sensor of the transducer of described detection battery parameter, and judge the operation that single lattice storage battery is current and health status, when battery management module 6 search finds that the amount of batteries of the single lattice storage battery 1 connected obviously exceeds or be less than other single lattice storage batterys, can judge that this single lattice storage battery falls behind, need to carry out electricity compensation, keep the harmony of batteries.Can setting sensor sampling time interval be 20 milliseconds, every 20 milliseconds sampling should be carried out, is stored in the microcontroller of each single lattice storage battery by the Battery pack supplemental characteristic collected, then compares.In addition outside server is connected through the internet to, staff can grasp the operating state of batteries at any time, and the operating state of each single lattice storage battery, be convenient to Timeliness coverage problem, in order to avoid there is over-charging of battery or charge less problem, and when finding that there is over-charging of battery or charge less, can be controlled by server, the discharge and recharge of each single lattice storage battery balanced, realizes the telemanagement of batteries.Described wireless communication module can adopt rf frequency at the wireless communications chips with two-way function of 2.4GHZ, 433MHZ or 915MHZ.Battery management module 6 and wireless communication module 5 are arranged in mounting groove 3, be self-contained within single lattice storage battery, simplify circuit by intensive for each element, reduce single lattice storage battery taking up room in the housing of batteries.
Upper described voltage sensor, current sensor and temperature sensor are separately positioned in three sensor recess 4 on the end cover for battery cells of single lattice storage battery, specifically see Fig. 1.Being provided separately transducer, not easily there is misconnection phenomenon in transducer and battery management module.Be connected with the battery terminal of single lattice storage battery for convenience of described transducer, be provided with a bottom outlet bottom described sensor recess 4, the battery terminal 11 of single lattice storage battery 1 is connected with the transducer be arranged in sensor recess 4 through bottom outlet.The connection shortened, not easily causes staggered.
As a kind of preferred embodiment, described battery management module comprises microcontroller and equalizing circuit, described equalizing circuit connects the battery terminal 11 of single lattice storage battery, and described equalizing circuit connects microcontroller, and described microcontroller connects the transducer of described detection battery parameter.Described equalizing circuit carries out the equilibrium of battery charging and discharging mainly through resistance power consumption balanced mode and electromagnetic energy conversion balanced mode.After microcontroller carries out analyzing and judge, by controlling the balance that equalizing circuit effect realizes between each single lattice storage battery when finding single lattice storage battery charge less or overcharge.
As a kind of preferred implementation, specifically see Fig. 2, described current sensor is Hall current sensor 12, one week shirt rim is provided with at sensor recess 4 bottom outlet periphery, surround magnet ring 13 groove bottom the perisporium of described shirt rim and sensor recess 4 and sensor recess 4, the magnet ring 13 be equipped with current sensor is placed in magnet ring 13 groove.Hall element is installed more stable and is prevented the electromagnetic interference not being vulnerable to other in independent sensor recess.
As a kind of preferred implementation, described mounting groove 3 is stamped a cover plate 8, is provided with two slide rails 7 at the periphery of mounting groove 3, described cover plate 8 covers on mounting groove 3 along slide rail 7.Cover plate 8 is covered on mounting groove, wiring can be avoided to arch upward, and storage battery concussion or when rocking, battery management module and wireless communication module not easily fall mounting groove outside, specifically see Fig. 3.
Can connect a display unit for convenience of the present situation understanding storage battery, the installation site of display unit with reference to following two kinds of modes, can be not limited to lifted position certainly.
Embodiment 1:
On the battery cover of described each single lattice storage battery, described battery management module 6 connects a display unit, described display unit is arranged on described cover plate 8, display unit can show the parameter such as voltage, electric current, temperature, capacity, battery remaining power SOC and cell health state SOH of single lattice storage battery, a display unit installed by each single lattice storage battery, when battery generation problem, be convenient to find problematic single lattice storage battery in time.
Embodiment 2:
As shown in Figure 4, by batteries outsourcing one housing 14, described housing is provided with hole, and the battery management module 6 on each single lattice storage battery is connected to by the hole on housing in the display unit 15 outside housing, and described display unit is arranged on housing.All shown on the display apparatus by the parameter status of all single lattice storage battery in battery case, the situation of staff to all single lattice storage battery in batteries is all very clear, is convenient to compare and judge, and has saved the use of display unit.
This external display device can be Vehicular display device, handheld PC display, portable computer or mobile phone etc., can be arranged on and be convenient to monitored by personnel Anywhere, certainly also realize the connection of display unit and battery management module by wireless mode.
In above-described embodiment, be battery management module 6 and wireless communication module 5 are arranged in the mounting groove 3 on end cover for battery cells 2, but battery management module 6 and wireless communication module 5 are arranged on and also can be mounted on other positions.Such as, be arranged on cover plate, this cover plate can be the cover plate 8 on mounting groove, also can be the cover plate covering exhaust valve port, or be arranged on the side of battery container.If after adopting cover plate mounting means, the valve port of equalizer and storage battery is comparatively far away, is conducive to acid-mist; If battery management module to be arranged on the side of housing, the production technology of storage battery can not be affected to side surface direction expansion.
In addition, it should be noted that, this intelligent battery can be used in electric motor car.But be not limited to be used in electric motor car.
Except above preferred embodiment, the utility model also has other execution mode, those skilled in the art can make various change and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the scope that the utility model claims define.

Claims (10)

1. an intelligent battery, comprise the batteries be composed in series by several single lattice storage batterys, it is characterized in that: described single lattice storage battery comprises battery management module, current sense components and battery terminal, described battery terminal is connected with described current sense components and described battery management module, the magnet ring that described current sense components comprises current sensor and is equipped with current sensor, described battery management module is arranged on a cover plate or the side of single lattice accumulator housing.
2. intelligent battery according to claim 1, is characterized in that: described current sensor is located in the breach of magnet ring, and described magnet ring is nested with on battery terminal.
3. intelligent battery according to claim 2, is characterized in that: on each single lattice storage battery, be provided with an end cover for battery cells, described end cover for battery cells is provided with the sensor recess placing described current sensor.
4. intelligent battery according to claim 3, is characterized in that: be provided with bottom outlet bottom described sensor recess, and battery terminal is connected with the current sense components be arranged in sensor recess through described bottom outlet.
5. intelligent battery according to claim 4, it is characterized in that: described current sensor is Hall current sensor, one week shirt rim is provided with at sensor recess bottom outlet periphery, surround a magnet ring groove bottom the perisporium of described shirt rim and sensor recess and sensor recess, the magnet ring be equipped with current sensor is placed in magnet ring groove.
6. the intelligent battery according to claim 1 to 5 any one, is characterized in that: be also provided with wireless communication module in described each single lattice storage battery, the wireless communication module of each single lattice storage battery intercoms mutually.
7. intelligent battery according to claim 6, it is characterized in that: described battery management module comprises microcontroller and equalizing circuit, described equalizing circuit connects the battery terminal of single lattice storage battery, and described equalizing circuit connects microcontroller, and described microcontroller connects described current sensor.
8. intelligent battery according to claim 7, it is characterized in that: at batteries outsourcing one housing, described housing is provided with hole, and the battery management module on each single lattice storage battery is connected to by the hole on housing in the display unit outside housing, and described display unit is arranged on housing.
9. intelligent battery according to claim 3, is characterized in that: described end cover for battery cells is provided with a mounting groove, described mounting groove is stamped a cover plate, and described battery management module is arranged on described cover plate or covers on the cover plate of exhaust valve port.
10. an electric motor car, is characterized in that: use the intelligent battery as described in claim 1 to 9 any one.
CN201420439301.XU 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car Active CN204156045U (en)

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CN201310601219.2A CN103682482A (en) 2013-11-22 2013-11-22 Wireless intelligent battery
CN201310601219.2 2013-11-22
CN201420439301.XU CN204156045U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car

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CN201310601219.2A Pending CN103682482A (en) 2013-11-22 2013-11-22 Wireless intelligent battery
CN201410382821.6A Pending CN104201431A (en) 2013-11-22 2014-08-06 Wireless smart battery and electric car
CN201420441343.7U Active CN204216175U (en) 2013-11-22 2014-08-06 A kind of intelligent wireless battery and electric motor car
CN201420441198.2U Active CN204156049U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car
CN201410382571.6A Pending CN104201429A (en) 2013-11-22 2014-08-06 Smart battery and electric car
CN201420442036.0U Active CN204156052U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car
CN201420439301.XU Active CN204156045U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car
CN201420439317.0U Active CN204156046U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car
CN201410383952.6A Pending CN104157919A (en) 2013-11-22 2014-08-06 Smart battery and electric vehicle
CN201420439653.5U Active CN204156047U (en) 2013-11-22 2014-08-06 A kind of intelligent wireless battery and electric motor car
CN201410382251.0A Pending CN104201428A (en) 2013-11-22 2014-08-06 Wireless smart battery and electric car
CN201420439683.6U Active CN204156048U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car
CN201410382694.XA Pending CN104201430A (en) 2013-11-22 2014-08-06 Smart battery and electric car

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CN201310601219.2A Pending CN103682482A (en) 2013-11-22 2013-11-22 Wireless intelligent battery
CN201410382821.6A Pending CN104201431A (en) 2013-11-22 2014-08-06 Wireless smart battery and electric car
CN201420441343.7U Active CN204216175U (en) 2013-11-22 2014-08-06 A kind of intelligent wireless battery and electric motor car
CN201420441198.2U Active CN204156049U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car
CN201410382571.6A Pending CN104201429A (en) 2013-11-22 2014-08-06 Smart battery and electric car
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CN201410383952.6A Pending CN104157919A (en) 2013-11-22 2014-08-06 Smart battery and electric vehicle
CN201420439653.5U Active CN204156047U (en) 2013-11-22 2014-08-06 A kind of intelligent wireless battery and electric motor car
CN201410382251.0A Pending CN104201428A (en) 2013-11-22 2014-08-06 Wireless smart battery and electric car
CN201420439683.6U Active CN204156048U (en) 2013-11-22 2014-08-06 A kind of intelligent battery and electric motor car
CN201410382694.XA Pending CN104201430A (en) 2013-11-22 2014-08-06 Smart battery and electric car

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