CN102088200B - Solar active equalization storage battery device of electrocar - Google Patents

Solar active equalization storage battery device of electrocar Download PDF

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Publication number
CN102088200B
CN102088200B CN 201110023288 CN201110023288A CN102088200B CN 102088200 B CN102088200 B CN 102088200B CN 201110023288 CN201110023288 CN 201110023288 CN 201110023288 A CN201110023288 A CN 201110023288A CN 102088200 B CN102088200 B CN 102088200B
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storage battery
voltage
analog switch
controller
solar module
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CN102088200A (en
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李玉芝
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Weifang Guangsheng New Energy Co Ltd
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Weifang Guangsheng New Energy Co Ltd
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Abstract

The invention relates to a solar active equalization storage battery device of an electrocar, the device comprises a storage battery pack, a solar battery component, a controller, a charging circuit and a plurality of analogue switches, the controller cyclically detects voltage of each storage battery by controlling the analogue switches and charges a storage battery having the lowest voltage by controlling the charging circuit so as to realize active equalization of the storage battery pack, thereby prolonging the service life of the storage battery and saving the energy source as well.

Description

A kind of solar energy of electric motor car is balanced accumulator plant initiatively
Technical field
The present invention relates to the balanced accumulator plant of solar energy active of a kind of accumulator plant, particularly a kind of electric motor car.
Background technology
Electric motor car is the new traffic tool of the following direction of representative, and the bottleneck that the restriction electric motor car is promoted is the expensive and low life-span of storage battery.High-end electric motor car adopts lithium battery, and the low side electric motor car adopts lead acid accumulator.
The lead acid accumulator that the low side electric motor car adopts generally all is that a plurality of storage battery series connection are used the back in groups, even better through the consistency of screening storage battery in groups, after use after a while, also difference can occur.
The way of traditional accumulator plant equalizing voltage is to improve charging voltage (promptly so-called " overcharging "); Charging later stage electric current descends gradually; When charging current no longer descends, accomplish equalizing charge, transfer floating charge to, this balanced way is become " passive equilibrium ".This balanced way is more effective to single storage battery, but concerning batteries, the cost of being paid is the high storage battery meeting dehydration of voltage; Energy loss is big; Periodic equilibrium causes damage to storage battery, and battery capacity is descended, even causes the thermal runaway of storage battery.
Continuous development along with electric motor car; Car battery need frequently discharge and recharge; Discharging current and depth of discharge all improve a lot than conventional use, and batteries is not done equilibrium or adopted traditional equalization methods can not satisfy the demand, and the cycle life of storage battery and rated life time can differ greatly.
In recent years along with the improving constantly of the continuous development of solar battery technology, solar module generating efficiency, solar module also more and more widely be applied to different fields, solar electric vehicle is exactly good proof.
Solar module is installed at certain position of electric motor car, under the fine situation of weather, for electric motor car provides the electric energy of a part, is the main design thought of solar electric vehicle.
But; In practical application, the application of solar module also faces following problem: the first, receive the restriction of electric motor car space, position; The installed capacity of solar module can not be too big; The electric energy of this part that therefore causes that solar module sends is less, and concerning whole electric motor car energy needed, proportion is little.The second, the electric energy that solar module sends is less to the charging current of batteries.As: the operating voltage of electric motor car be mostly 36V~96V (3~8 joint 12V lead acid accumulator); And the optimum operating voltage of the electric energy that single solar module sends is generally about 17V; After carrying out boosting inverter; When batteries was charged, charging current was less, and charging effect is unsatisfactory.
Summary of the invention
Be applied in the time existing deficiency in the electric motor car to existing common lead acid accumulator and solar module; The present invention proposes a kind of balanced accumulator plant of solar energy active of electric motor car; This accumulator plant can avoid traditional because the unbalanced battery malfunction that causes of storage battery; The generation of problems such as energy loss is big, and cell batteries performance and life-span are short.
The present invention adopts following technical scheme: the solar energy of this electric motor car initiatively balanced accumulator plant comprises: the batteries that is in series by the polylith storage battery; The initiatively solar module of equalizing voltage is provided; Controller; Charging circuit; Be respectively applied for first, second A/D modular converter that detects battery tension and solar module output voltage; First, second hilted broadsword is thrown the temperature sensor of analog switch, DPDT analog switch and measures ambient temperature more, and wherein, the polylith batteries is cascaded provides work required electric energy for electric motor car; The positive pole of polylith storage battery is connected with a plurality of fixed contacts that first hilted broadsword is thrown analog switch more respectively; The negative pole of polylith storage battery is connected with a plurality of fixed contacts that second hilted broadsword is thrown analog switch more respectively, and the moving contact that first, second hilted broadsword the is thrown analog switch more moving contact of DPDT analog switch respectively connects, and two groups of fixed contacts of DPDT analog switch are connected with an A/D modular converter and charging circuit respectively; Charging circuit is connected with solar module and the 2nd A/D modular converter; Solar module is connected with the 2nd A/D modular converter, and the output of temperature sensor is connected with controller, in order to temperature signal is passed to controller; Controller is connected with the output of the first and second A/D modular converters to receive the voltage data from them, and the control signal output ends of controller is thrown analog switch with first, second A/D modular converter, charging circuit, DPDT analog switch and two hilted broadswords more and is connected.
Controller is thrown the voltage of every storage battery in analog switch, DPDT analog switch and the first and second A/D modular converter cycle detection batteries and the output voltage of solar module through controlling first and second hilted broadswords more; Judge the position of the minimum single storage battery of voltage; If the output voltage of solar module reaches monolithic charge in batteries required voltage; Then controller will start the single charge in batteries of charging circuit to choosing, voltage is minimum; Reach the said process that then circulates after the predetermined charging interval, thereby the voltage that reaches all storage batterys is equal basically, realizes initiatively balanced; Treat batteries after a period of stabilisation, repeat above-mentioned active equalization operation.As the equal and minimum storage battery of voltage of two voltages appears, then select a certain storage battery to carry out aforesaid operations at random.
Accumulator plant can also be utilized the ambient temperature around the temperature sensor measurement storage battery, and controller is then controlled charging circuit according to measurement result in good time storage battery is done temperature-compensating.
The voltage detecting precision of storage battery and solar module is controlled in the 20mv, the precision of temperature sensor is controlled at ± 1 ℃ in.
Adopt the accumulator plant of technique scheme, can break away from because the unbalanced battery malfunction that causes of storage battery; Initiatively balanced batteries no longer needs the high pressure of passive equilibrium to overcharge; Can reduce maximum charging voltage, can make the storage battery dehydration still less like this, prolong the life of storage battery; And reduce the possibility of storage battery thermal runaway greatly, reduce unnecessary energy loss; After certain battery damage in the batteries, need only this storage battery be changed, change and must not put in order group, can practice thrift many expenses.This accumulator plant will make new and old battery tension be consistent operate as normal.And owing to only carry out the active equilibrium treatment to single storage battery, the solar module variation that need not to boost reduces unnecessary energy loss.The variation owing to no longer boost, even battery component power is less, charging current is also relatively large, single storage battery is carried out the equalizing charge required time also can be shorter.As long as the electric energy (mainly being voltage request) that solar module sends meets the charging requirement of monolithic storage battery, can begin charging, make full use of the energy.
Description of drawings
Fig. 1 accumulator plant structure chart of the present invention
Wherein: 1-storage battery, 2-solar module, 3-controller, 4-the 2nd A/D modular converter; 5-the one A/D modular converter, 6-first hilted broadsword is thrown analog switch more, and 7-second hilted broadsword is thrown analog switch more; The 8-charging circuit, 9-DPDT analog switch, 10-temperature sensor.
Embodiment
As shown in Figure 1; Polylith storage battery 1 is cascaded and forms batteries in order to electric motor car electric energy to be provided; Providing initiatively, the solar module 2 of equalizing voltage is connected with charging circuit 8; The positive pole of polylith storage battery is connected with a plurality of fixed contacts that first hilted broadsword is thrown analog switch 6 more respectively; The negative pole of polylith storage battery is connected with a plurality of fixed contacts that second hilted broadsword is thrown analog switch 7 more respectively; First, second hilted broadsword is thrown the moving contact moving contact connection of DPDT analog switch 9 respectively of analog switch 6,7 more; The signal input end that first, second hilted broadsword is thrown analog switch 6,7 and DPDT analog switch 9 more is connected with controller 3, and controller 3 output control signals control analog switches 6,7 and 9 action make one group of fixed contact connection that the moving contact of double-point double-throw switch 9 is connected with input with an A/D modular converter 5; Output voltage with every storage battery of cycle detection 1; This magnitude of voltage converts digital signal into through an A/D modular converter 5 and is delivered to controller 3, and controller 3 is judged the position of the minimum single storage battery of voltage according to the input of an A/D modular converter 5, and the output voltage of solar module 2 converts digital signal into through the 2nd A/D modular converter 4 and is transported to controller 3; Controller judges whether the output voltage of solar module 2 satisfies the charging requirement of monolithic storage battery; If meet the demands, then controller 3 one group of fixed contact making the moving contact of DPDT analog switch 9 be connected with voltage output end with charging circuit 8 connects, and controls the one the second hilted broadswords and throw analog switch 6,7 more and charge with the minimum storage battery of connection voltage.Reach the said process that then circulates after the predetermined charging interval, thereby the voltage that reaches all storage batterys is equal basically, realizes initiatively balanced.Treat batteries after a period of stabilisation, repeat above-mentioned active balancing procedure.In balancing procedure, equate and the minimum storage battery of voltage that as two voltages occurring then controller 3 selects a certain storage battery 1 to carry out aforesaid operations at random.
Simultaneously, accumulator plant also utilizes temperature sensor 10 to measure storage battery ambient temperature on every side, and 3 of controllers are controlled 8 pairs of storage batterys of charging circuit according to measurement result in good time and done temperature-compensating.In order to reach better active portfolio effect, storage battery with 1 and the voltage detecting precision of solar module 2 be controlled in the 20mv, the certainty of measurement of temperature sensor is controlled at ± 1 ℃ in.
More than specific descriptions of the present invention are intended to explain the implementation of specific embodiments can not be interpreted as it is limitation of the present invention.Those of ordinary skills can make various variants on the basis of the embodiment that details under instruction of the present invention, these variants all should be included within the design of the present invention.

Claims (5)

1. the solar energy of an electric motor car balanced accumulator plant initiatively; Comprise: the batteries that is in series by polylith storage battery (1); The initiatively solar module (2) of equalizing voltage is provided; Controller (3); Charging circuit (8); Be respectively applied for the first and second A/D modular converters (5,4) of gathering and changing storage battery and solar module output voltage; First and second hilted broadswords are thrown the temperature sensor (10) of analog switch (6,7), DPDT analog switch (9) and measures ambient temperature more; Wherein, The positive pole of said polylith storage battery (1) is connected with a plurality of fixed contacts that said first hilted broadsword is thrown analog switch (6) more respectively, and the negative pole of said polylith storage battery (1) is connected with a plurality of fixed contacts that said second hilted broadsword is thrown analog switch (7) more respectively, and the moving contact that said first, second hilted broadsword is thrown analog switch (6,7) more is connected with the moving contact of said DPDT analog switch (9) respectively; Two groups of fixed contacts of said DPDT analog switch (9) are connected with the output of a said A/D modular converter (5) and said charging circuit (8) respectively; Said charging circuit (8) is connected with said solar module (2) and said the 2nd A/D modular converter (4), and said solar module (2) is connected with said the 2nd A/D modular converter (4), and the output of said temperature sensor (10) is connected with said controller (3); In order to temperature signal is passed to said controller (3); Said controller (3) is connected with the output of the said first and second A/D modular converters (5,4) to receive the voltage data from them, and the control signal output ends of said controller (3) is thrown analog switch (6,7) with said first, second A/D modular converter (5,4), said charging circuit (8), said DPDT analog switch (9) and said first and second hilted broadswords more and is connected, and said controller (3) is thrown the voltage of every storage battery (1) in analog switch (6,7), said DPDT analog switch (9) and the said first and second A/D modular converters (5,4) the cycle detection batteries and the output voltage of said solar module (2) through controlling said first and second hilted broadswords more; Judge the position of the minimum single storage battery of voltage; If the output voltage of solar module (2) reaches the charging required voltage, then said controller (3) will start the voltage minimum single charge in batteries of charging circuit (8) to choosing, and reach the said process that then circulates after being scheduled to the charging interval; Thereby the voltage that reaches all storage batterys is equal basically; The active that realizes batteries is balanced, treats batteries after a period of stabilisation, repeats above-mentioned active equalization operation.
2. device as claimed in claim 1 is characterized in that: also utilize said temperature sensor (10) measures ambient temperature, said controller (3) is then controlled charging circuit (8) according to measurement result in good time and is done temperature-compensating for storage battery.
3. device according to claim 1 and 2 is characterized in that: the voltage detecting precision for storage battery (1) and solar module (2) is controlled in the 20mv, the precision of temperature sensor is controlled at ± 1 ℃ in.
4. device according to claim 1 and 2 is characterized in that: if detect identically and magnitude of voltage is minimum more than 1 battery tension, then said controller (3) selects a storage battery to charge at random.
5. electric motor car, the solar energy that it is characterized in that including each described electric motor car among the claim 1-4 is balanced accumulator plant initiatively.
CN 201110023288 2011-01-20 2011-01-20 Solar active equalization storage battery device of electrocar Active CN102088200B (en)

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DE102012209646A1 (en) * 2012-06-08 2013-12-12 Robert Bosch Gmbh Method for determining a wear status of a battery module, battery management system, polyphase battery system and motor vehicle
CN104901373B (en) * 2015-06-04 2018-07-13 深圳市爱兰博功率电子有限公司 Balance-type charger and method
CN105226747A (en) * 2015-09-22 2016-01-06 河南速达电动汽车科技有限公司 A kind of batteries of electric automobile active equalization system of photovoltaic generation

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US6377024B1 (en) * 2001-03-23 2002-04-23 The Boeing Company Method and system for charge equalization of lithium-ion batteries
CN201639320U (en) * 2010-01-18 2010-11-17 上海东裕电动车有限公司 Electric vehicle and solar charging device thereof
CN101931254B (en) * 2010-08-31 2012-12-26 重庆大学 Guasi-static equalizing charge system and method for serially connected lithium battery pack
CN201985564U (en) * 2011-01-20 2011-09-21 潍坊广生新能源有限公司 Solar active equalized storage battery device for electromobile and electromobile

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