CN201937308U - Electric vehicle charger with electricity quantity indication - Google Patents

Electric vehicle charger with electricity quantity indication Download PDF

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Publication number
CN201937308U
CN201937308U CN2011200406695U CN201120040669U CN201937308U CN 201937308 U CN201937308 U CN 201937308U CN 2011200406695 U CN2011200406695 U CN 2011200406695U CN 201120040669 U CN201120040669 U CN 201120040669U CN 201937308 U CN201937308 U CN 201937308U
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CN
China
Prior art keywords
circuit
battery
charging
electricity quantity
operational amplifier
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011200406695U
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Chinese (zh)
Inventor
李北辰
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Individual
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Individual
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Publication date
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Priority to CN2011200406695U priority Critical patent/CN201937308U/en
Application granted granted Critical
Publication of CN201937308U publication Critical patent/CN201937308U/en
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Expired - Fee Related legal-status Critical Current

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model relates to a battery charging device, in particular to a device for charging a battery of an electric vehicle, comprising a charging circuit, wherein the charging circuit comprises a switch power supply circuit and an electronic switch circuit; an operational amplifier circuit is connected in series between the switch power supply circuit and the electronic switch circuit; the operational amplifier circuit detects the voltage of the battery and controls the opening and closing of the electronic switch circuit; and the operational amplifier circuit is connected with an electricity quantity indicating lamp for indicating the electricity quantity and the charging state of the battery. The electric vehicle charger with electricity quantity indication adopts the operational amplifier to control the charging of the battery, is provided with the electricity quantity indicating lamp, and effectively avoids the problems that the conventional charger is charged without indication due to lack of quantity indication and the performance of the battery is reduced due to memory effect on the premise of controlling the cost, and meanwhile, a user can directly obverse the residual electricity quantity of the battery, and the operation is convenient.

Description

The electric car charger of carried charge indication
Technical field
The utility model relates to battery charger, particularly gives the device of charging battery of electric vehicle.
Background technology
At present, electric car charger does not on the market all have the battery electric quantity indication.Before charging, the user does not know how many electric weight battery also has, and in charging process, the user does not know how many batteries filled yet.If the user can cause battery to reduce battery performance because of memory effect through the battery dump energy more just charging of being everlasting.Patent 201020243733.5 has designed a kind of circuit that adopts the microprocessor controls charging, but adopts the cost of microcontroller higher, is not suitable for penetration and promotion.
Summary of the invention
The purpose of this utility model is to provide a kind of electric car charger of carried charge indication.
The purpose of this utility model is achieved through the following channels: a kind of electric car charger of carried charge indication, it comprises charging circuit, charging circuit is made of switching power circuit and electronic switching circuit, be serially connected with between switching power circuit and the electronic switching circuit and detect cell voltage and control the operation amplifier circuit that electronic switching circuit opens and closes, operation amplifier circuit is connected with the electric weight of pilot cell and the electric weight indicator light of charged state.
Further, the quantity of described electric weight indicator light is 2-6.
The electric car charger of the utility model carried charge indication adopts operational amplifier that battery charge is controlled, and provide the electric weight indicator light, under the controlled prerequisite of cost, effectively avoid existing charger blindly to charge, thereby cause the problem of battery because of the memory effect decreased performance because of lacking the electric weight indication.Simultaneously, the user can watch the last electric weight of battery intuitively, and is very convenient.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 is the utility model block diagram;
Electric weight indicator light effect demonstration graph when Fig. 2 is the utility model charged state.
Among the figure: switching power circuit 1, operation amplifier circuit 2, electronic switching circuit 3, electric weight indicator light 4.
Embodiment
The electric car charger of the utility model carried charge indication, it comprises charging circuit, charging circuit is made of switching power circuit 1 and electronic switching circuit 3, be serially connected with operation amplifier circuit 2 between switching power circuit 1 and the electronic switching circuit 3, operation amplifier circuit 2 detects cell voltage and controls electronic switching circuit 3 and opens and closes, and operation amplifier circuit 2 is connected with the electric weight of pilot cell and the electric weight indicator light 4 of charged state.
As shown in Figure 1, described switching power circuit 1 is used for 220 volts of alternating currents are converted to the low-voltage DC of charging usefulness, and this low-voltage dc power supply voltage is according to the voltage decision of rechargeable battery, normally than the high 3-8V of charged battery voltage; Described operation amplifier circuit 2 is used to detect cell voltage and charging current, controls charging current by control electronic switching circuit 3, and the electric weight and the charged state of control electric weight indicator light 4 pilot cells.Operation amplifier circuit 2 is connected with electric weight indicator light 4, and electric weight indicator light 4 can be represented charged state and battery electric quantity.
As shown in Figure 2, power supply P1 and capacitor C 1 among the figure have been formed switching power circuit 1, are used for converting the 220V alternating current to direct current.Field effect transistor Q1 among the figure and U4, R7, R12, C3 have formed electronic switching circuit 3, and the output of power supply P1 is directly connected on the field effect transistor Q1.Operation amplifier circuit 2 has comprised operational amplifier chip U2A, U2B, U2C, U2D, U3A, U3B, resistance R 1-R6, R8-R11, and wherein resistance R 1-R6, R8-R11 are used for providing a reference voltage to operational amplifier chip U2B, U2C, U2D, U3A, U3B.Operational amplifier chip U2A is control field effect transistor Q1 after PWM controller chip U4 amplifies control signal.Resistance R 14 is used for the sampling of charging current, adopt current signal input PWM controller chip U4; Resistance R 13 and R15 are used for battery voltage sampling, adopt signal be directly inputted among operational amplifier chip U2B, U2C, U2D, U3A, the U3B, in order to the on and off of control charging indicator light L1-L5, with what of pilot cell electric weight.Resistance R 16-R20 is a current-limiting resistance, is used to regulate the brightness of indicator light L1-L5.According to the size of charging current and the cell voltage that collects, operational amplifier chip U2A and PWM controller chip U4 can control charging current by control field effect transistor Q1.U1 and capacitor C 2, C4 are auxiliary circuit among Fig. 2, and being used for provides a positive power supply of 5 volts to the operational amplifier chip.J1 is a battery interface, connects the battery of required charging.
In this example, electric weight indicator light 4 has 5, and when charging still was no more than 40% above 20% of battery electric quantity, indicator light L1 lighted, and L2, L3, L4, L5 do not work; When charging still was no more than 60% above 40% of battery electric quantity, two indicator light L1, L2 lighted, and L3, L4, L5 do not work; In like manner, when battery electric quantity surpassed 60%, 80%, 100% respectively, indicator light L3, L4, L5 lighted successively.So just can judge how many batteries filled by the indicator light number of lighting.

Claims (2)

1. the electric car charger of carried charge indication, it comprises charging circuit, charging circuit is made of switching power circuit (1) and electronic switching circuit (3), it is characterized in that: be serially connected with operation amplifier circuit (2) between described switching power circuit (1) and the electronic switching circuit (3), operation amplifier circuit (2) is connected with electric weight indicator light (4).
2. the electric car charger of carried charge indication as claimed in claim 1 is characterized in that: the quantity of described electric weight indicator light (4) is 2-6.
CN2011200406695U 2011-02-17 2011-02-17 Electric vehicle charger with electricity quantity indication Expired - Fee Related CN201937308U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200406695U CN201937308U (en) 2011-02-17 2011-02-17 Electric vehicle charger with electricity quantity indication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200406695U CN201937308U (en) 2011-02-17 2011-02-17 Electric vehicle charger with electricity quantity indication

Publications (1)

Publication Number Publication Date
CN201937308U true CN201937308U (en) 2011-08-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011200406695U Expired - Fee Related CN201937308U (en) 2011-02-17 2011-02-17 Electric vehicle charger with electricity quantity indication

Country Status (1)

Country Link
CN (1) CN201937308U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102495375A (en) * 2011-12-05 2012-06-13 东莞奥托泰电器制品有限公司 Method for detecting battery and standby charging power supply on vehicle, and standby charging power supply
CN108257622A (en) * 2018-03-06 2018-07-06 宁波向往智能科技有限公司 A kind of charging management system of background music host

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102495375A (en) * 2011-12-05 2012-06-13 东莞奥托泰电器制品有限公司 Method for detecting battery and standby charging power supply on vehicle, and standby charging power supply
CN108257622A (en) * 2018-03-06 2018-07-06 宁波向往智能科技有限公司 A kind of charging management system of background music host
CN108257622B (en) * 2018-03-06 2024-05-24 宁波向往智能科技有限公司 Charging management system of background music host

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Changsha Leadten Electronic Technology Co., Ltd.

Assignor: Li Beichen

Contract record no.: 2011430000224

Denomination of utility model: Electrically-propelled vehicle charger with electric quantity indication function

Granted publication date: 20110817

License type: Exclusive License

Record date: 20111017

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110817

Termination date: 20150217

EXPY Termination of patent right or utility model