CN203967797U - Electric automobile battery charger output protection circuit - Google Patents
Electric automobile battery charger output protection circuit Download PDFInfo
- Publication number
- CN203967797U CN203967797U CN201420390285.XU CN201420390285U CN203967797U CN 203967797 U CN203967797 U CN 203967797U CN 201420390285 U CN201420390285 U CN 201420390285U CN 203967797 U CN203967797 U CN 203967797U
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- battery
- relay
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- diode
- resistance
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- Withdrawn - After Issue
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of electric automobile battery charger output protection circuit, comprising: diode, resistance, electric capacity, relay and control circuit; This diode is connected with this resistance, this diode and the two ends of the series circuit of this resistance are connected respectively charger output port and the battery of this electric automobile, this diode is in parallel with this relay with the series circuit of this resistance, the two ends of this relay connect respectively charger output port and this battery, this electric capacity is in parallel with the charger output port of electric automobile, and be connected with series circuit and this relay of this resistance with this diode, this control circuit connects Master control chip, battery and this Control end of this charger; Wherein, this battery can be to this capacitor charging, and the voltage of this control circuit to this electric capacity and the voltage of this battery are sampled, and according to the break-make of an external command and this relay of sampled result control.
Description
Technical field
The utility model relates to electric vehicle engineering field, particularly a kind of electric automobile battery charger output protection circuit.
Background technology
Along with the development of New-energy electric vehicle, also obtain great development as the main accessory electric automobile battery charger of charging batteries of electric automobile system.The vehicle-mounted charger technology of existing electric automobile has mainly realized stable output voltage and current for battery charging.But the in the situation that of battery reversal connection, charger still has output for battery charging, easily causes charger and battery to break down.Meanwhile, in the time that battery frequently accesses, can between battery and charger, produce surge current and impact, cause device failure.
Utility model content
The purpose of this utility model is to provide a kind of electric automobile battery charger output protection circuit; to solve in the situation of battery reversal connection; charger still has output for battery charging; easily cause charger and battery to break down; and in the time that battery frequently accesses; can between battery and charger, produce surge current and impact, cause the problem of device failure.
A kind of electric automobile battery charger output protection circuit of the utility model, comprising: diode, resistance, electric capacity, relay and control circuit; This diode is connected with this resistance, this diode and the two ends of the series circuit of this resistance are connected respectively charger output port and the battery of this electric automobile, this diode is in parallel with this relay with the series circuit of this resistance, the two ends of this relay connect respectively charger output port and this battery, this electric capacity is in parallel with the charger output port of electric automobile, and be connected with series circuit and this relay of this resistance with this diode, this control circuit connects Master control chip, battery and this Control end of this charger; Wherein, this battery can be to this capacitor charging, and the voltage of this control circuit to this electric capacity and the voltage of this battery are sampled, and according to the break-make of an external command and this relay of sampled result control.
According to an embodiment of the utility model electric automobile battery charger output protection circuit, wherein, the anode of this diode is connected with this battery.
According to an embodiment of the utility model electric automobile battery charger output protection circuit; wherein; when this control circuit receives after a start-up command; voltage to this battery and this electric capacity is sampled; as the difference of this cell voltage and this capacitance voltage is less than a threshold value; this control circuit sends adhesive instruction to this relay, and to this Master control chip transmitted signal, this charger output of this Master control chip control.
According to an embodiment of the utility model electric automobile battery charger output protection circuit; wherein; this control circuit receives after a shutdown command; to this Master control chip transmitted signal; this this charger of Master control chip control stops output; this control circuit is sampled to the voltage of this cell voltage and this electric capacity, and as the difference of this cell voltage and this capacitance voltage is less than a threshold value, this control circuit sends open command to this relay.
According to an embodiment of the utility model electric automobile battery charger output protection circuit, wherein, this threshold value is 10v.
According to an embodiment of the utility model electric automobile battery charger output protection circuit, wherein, the negative terminal of this battery connects one end of this electric capacity, and the anode of this battery connects respectively the series circuit of this relay and this diode and this resistance.
To sum up; the utility model is improved for the defect of existing charger output protection circuit; the charger output protection circuit of electric automobile comprises the resistance R of surge current suppression, anti-reverse protection diode D, relay K and control circuit etc.; by to cell voltage and capacitance voltage sampling and processing, then relay is sent to corresponding control command.Connect protection by control realization inhibition surge and cell anti-reverse to relay.
Brief description of the drawings
Figure 1 shows that the principle signal of the utility model electric automobile battery charger output protection circuit;
Figure 2 shows that the startup workflow diagram of electric automobile battery charger output protection circuit;
Figure 3 shows that the workflow diagram of closing of electric automobile battery charger output protection circuit.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the charger output protection circuit of electric automobile of the present utility model is further described.
Figure 1 shows that the principle schematic of the charger output protection circuit of the utility model electric automobile, as shown in Figure 1, the charger output protection circuit of electric automobile comprises: diode D, resistance R, capacitor C, relay 5 and control circuit 2.
Shown in Fig. 1, diode D and resistance R are connected in series, and diode D is in parallel with relay 5 with the series circuit of resistance R.The series circuit of diode D and circuit R and relay 5, be connected between the anode of battery 1 and the Master control chip of charger 4 of electric motor car, and the anode of diode D is connected with the anode of battery 1.The two ends of capacitor C connect respectively positive input terminal and the negative input end of Master control chip 4.The negative terminal of battery 1 connects the negative input end of Master control chip 4.Control circuit 2 connects the anode of capacitor C, samples with the voltage to capacitor C, and because the output VO of charger accesses between the anode and control circuit 2 of capacitor C, thus can be according to the sampled voltage of capacitor C, determine the voltage of charger output access.The first control signal output of control circuit 2 connects relay 5, and so that the action of relay 5 is controlled, the second control signal output of control circuit 2 connects Master control chip 4, so that the action of Master control chip 4 is controlled.
Wherein, the object that diode D is set is in order to prevent battery 1 reversal connection.And the object that resistance R is set is by the opening/closing time of control relay 5, in the time period that may have surge current, relay 5 is opened, make the flow through series circuit of resistance R and diode D of electric current, with surge current suppression, and in other periods, closed relay 5, make the electric current relay 5 of flowing through, the series circuit of resistance R and diode D, by short circuit, carries out normal charge.So, charger output protection circuit can reach surge current impact and prevent the effect of battery reversal connection.
Figure 2 shows that the startup workflow diagram of the charger output protection circuit of electric automobile, the startup workflow of sketching the utility model charger output protection circuit according to Fig. 1 and Fig. 2, specifically starts workflow and comprises:
Step 101, by battery 1 place in circuit, and charge to capacitor C by the series circuit of diode D and resistance R;
Step 102, control circuit 2 receive outside start-up command;
Voltage to capacitor C of step 103, control circuit 2 and the voltage of battery 1 are sampled, and whether the difference that judges the voltage of battery 1 and the voltage of capacitor C is within certain threshold value, for example, whether the difference that can judge the voltage of battery 1 and the voltage of capacitor C is less than 10v, if be less than 10v, perform step 104, otherwise, foregoing repeated;
Step 104, control circuit 2 send adhesive instruction to relay 5, and relay 5 adhesives make resistance R and diode D by short circuit;
Step 105, Master control chip 4 are controlled charger and are started, to charge to battery 1.
Figure 3 shows that electric automobile charger output protection circuit close workflow diagram, the workflow of closing of sketching the utility model charger output protection circuit according to Fig. 1 and Fig. 3, specifically close workflow and comprise:
Step 201, control circuit 2 receive outside shutdown command;
Step 202, control circuit 2 send charger shutdown command to Master control chip 4, and Master control chip 4 is controlled charger and stopped;
Voltage to capacitor C of step 203, control circuit 2 and the voltage of battery 1 are sampled, and whether the difference that judges the voltage of battery 1 and the voltage of capacitor C is within certain threshold value, for example, whether the difference that can judge the voltage of battery 1 and the voltage of capacitor C is less than 10v, if be less than 10v, perform step 204, otherwise, foregoing repeated;
Step 204, control circuit 2 send open command to relay 5, and control relay 5 disconnects.
In shutdown process, export according to the first charge closing machine of instruction, then carry out other switch motions, ensured the reliability of switching device.And realize the function with low-voltage relay control High voltage output, provided cost savings.
The in the situation that of frequent starting, by charger output protection circuit, the charging process of whole electric automobile is all carried out above-mentioned process, effectively the impact of surge current suppression.
To sum up; the utility model is improved for the defect of existing charger output protection circuit; the charger output protection circuit of electric automobile comprises the resistance R of surge current suppression, anti-reverse protection diode D, relay K and control circuit etc.; by to cell voltage and capacitance voltage sampling and processing, then relay is sent to corresponding control command.Connect protection by control realization inhibition surge and cell anti-reverse to relay.
The above-mentioned description for embodiment is for those skilled in the art are for understanding and the application of this patent, those of ordinary skill in the art obviously can more easily make various amendments for example, and General Principle described herein are applied in other example and needn't pass through creative work.Therefore, this patent is not limited to the embodiment here, and those skilled in the art, according to the announcement of this patent, can obtain more embodiment, will not enumerate here.
Claims (7)
1. an electric automobile battery charger output protection circuit, is characterized in that, comprising: diode, resistance, electric capacity, relay and control circuit;
This diode is connected with this resistance, this diode and the two ends of the series circuit of this resistance are connected respectively charger output port and the battery of this electric automobile, this diode is in parallel with this relay with the series circuit of this resistance, the two ends of this relay connect respectively charger output port and this battery, this electric capacity is in parallel with the charger output port of electric automobile, and be connected with series circuit and this relay of this resistance with this diode, this control circuit connects Master control chip, battery and this Control end of this charger;
Wherein, this battery can be to this capacitor charging, and the voltage of this control circuit to this electric capacity and the voltage of this battery are sampled, and according to the break-make of an external command and this relay of sampled result control.
2. protective circuit as claimed in claim 1, is characterized in that, the anode of this diode is connected with this battery.
3. protective circuit as claimed in claim 1; it is characterized in that; when this control circuit receives after a start-up command; voltage to this battery and this electric capacity is sampled; as the difference of this cell voltage and this capacitance voltage is less than a threshold value; this control circuit sends adhesive instruction to this relay, and to this Master control chip transmitted signal, this charger output of this Master control chip control.
4. protective circuit as claimed in claim 3, is characterized in that, this threshold value is 10v.
5. protective circuit as claimed in claim 1; it is characterized in that; this control circuit receives after a shutdown command; to this Master control chip transmitted signal; this this charger of Master control chip control stops output; this control circuit is sampled to the voltage of this cell voltage and this electric capacity, and as the difference of this cell voltage and this capacitance voltage is less than a threshold value, this control circuit sends open command to this relay.
6. protective circuit as claimed in claim 5, is characterized in that, this threshold value is 10v.
7. protective circuit as claimed in claim 1; it is characterized in that; the negative terminal of this battery connects one end of this electric capacity; the anode of this battery connects respectively the series circuit of this relay and this diode and this resistance; the other end of this electric capacity connects series circuit, this Master control chip and this Capacitance parallel connection of this relay and this diode and this resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390285.XU CN203967797U (en) | 2014-07-15 | 2014-07-15 | Electric automobile battery charger output protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390285.XU CN203967797U (en) | 2014-07-15 | 2014-07-15 | Electric automobile battery charger output protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203967797U true CN203967797U (en) | 2014-11-26 |
Family
ID=51928341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420390285.XU Withdrawn - After Issue CN203967797U (en) | 2014-07-15 | 2014-07-15 | Electric automobile battery charger output protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203967797U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052133A (en) * | 2014-07-15 | 2014-09-17 | 中国兵器工业第二〇八研究所 | Output protection circuit of charger of electric vehicle |
| CN110199454A (en) * | 2017-09-25 | 2019-09-03 | 株式会社Lg化学 | Cell managing device and battery pack and vehicle including cell managing device |
-
2014
- 2014-07-15 CN CN201420390285.XU patent/CN203967797U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052133A (en) * | 2014-07-15 | 2014-09-17 | 中国兵器工业第二〇八研究所 | Output protection circuit of charger of electric vehicle |
| CN104052133B (en) * | 2014-07-15 | 2016-09-14 | 中国兵器工业第二0八研究所 | Electric automobile battery charger output protection circuit |
| CN110199454A (en) * | 2017-09-25 | 2019-09-03 | 株式会社Lg化学 | Cell managing device and battery pack and vehicle including cell managing device |
| CN110199454B (en) * | 2017-09-25 | 2023-06-06 | 株式会社Lg新能源 | Battery management device, battery pack including battery management device, and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141126 Effective date of abandoning: 20160914 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |