CN208855459U - A kind of detection device of the contactor state of electric car and its battery charger - Google Patents
A kind of detection device of the contactor state of electric car and its battery charger Download PDFInfo
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- CN208855459U CN208855459U CN201821545692.8U CN201821545692U CN208855459U CN 208855459 U CN208855459 U CN 208855459U CN 201821545692 U CN201821545692 U CN 201821545692U CN 208855459 U CN208855459 U CN 208855459U
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model discloses a kind of detection devices of the contactor state of electric car and its battery charger, comprising: the first temperature sensor, the current sensor of electric current for detecting contactor, voltage for detecting contactor voltage detecting circuit and processing circuit.First temperature sensor detects the temperature T of contactor when rechargeable battery enters constant-current charging phase0, and detect the current temperature T of contactort.Processing circuit calculates Current Temperatures TtEnter temperature T when constant-current charging phase with rechargeable battery0Difference △ T；The contact resistance of contactor is obtained according to the voltage and current；The state of contactor is obtained according to the contact resistance, preset resistance threshold, the difference △ T and preset temperature rise threshold value.As it can be seen that realizing the detection to contactor state, the safety of rechargeable battery charging is improved.
Description
Technical field
The utility model relates to electric car fields, and in particular to the contact of a kind of electric car and its battery charger
The detection device of device state.
Background technique
With the universal successively and development of electric car, plug-in hybrid-power automobile, the high voltage electric of vehicle safe day
Become important, and the requirement of high voltage electric safety also increasingly becomes tight.Switching device in high tension loop --- high voltage connector
State is particularly critical, occurs electric car accident on fire currently on the market, is partially because the reasons such as high voltage connector failure are drawn
It rises.Electric car fault is easily caused after high voltage connector failure, brings security risk even accident.
Therefore, the prior art is also need to be improved and enhanced.
Utility model content
The utility model is intended to provide a kind of detection device of the contactor state of electric car and its battery charger,
To realize the detection of contactor state, the safety of charging is improved.
According to a first aspect of the present application, this application provides a kind of contactor state-detection of battery charger dresses
It sets, comprising:
First temperature sensor, for when rechargeable battery enters constant-current charging phase, detecting the temperature T of contactor0, and
Detect the current temperature T of contactort；
Current sensor, for detecting the electric current of contactor；
Voltage detecting circuit, for detecting the voltage of contactor；
Current sensor and contactor are connected in series；The first input end of voltage detecting circuit and the front end of contactor are electrically connected
It connects, the second input terminal of voltage detecting circuit is electrically connected with the rear end of contactor；Output end, the electric current of first temperature sensor pass
The output end of sensor and the output end of voltage detecting circuit are electrically connected with processing circuit；
Processing circuit, for calculating Current Temperatures TtEnter temperature T when constant-current charging phase with rechargeable battery0Difference
△T；The contact resistance of contactor is obtained according to the voltage and current；According to the contact resistance, preset resistance threshold, institute
It states difference △ T and preset temperature rise threshold value obtains the state of contactor.
In the device, the processing circuit includes:
Difference computational unit, for calculating Current Temperatures TtEnter temperature T when constant-current charging phase with rechargeable battery0's
Difference △ T；
Resistance calculations unit, for obtaining the contact resistance of contactor according to the voltage and current；
Judging unit, for the size of the contact resistance and preset resistance threshold, the difference △ T and
The size of preset temperature rise threshold value；It is less than the resistance threshold in the contact resistance, and the difference △ T is less than the temperature rise
When threshold value, it is believed that contacts of contactor does not fail；It is greater than the resistance threshold in the contact resistance, and the difference △ T is greater than
When the temperature rise threshold value, it is believed that contacts of contactor failure.
In the device, the judging unit is also used to: being less than the resistance threshold in the contact resistance, and described
When difference △ T is greater than the temperature rise threshold value, it is believed that there are failure risks for contacts of contactor；It is greater than the electricity in the contact resistance
Hinder threshold value, and the difference △ T be less than the temperature rise threshold value when, it is believed that there are failure risks for contacts of contactor.
It further include human-computer interaction device in the device, the output end electricity of the human-computer interaction device and judging unit
Connection, for issuing the warning to need repairing in the form of light, text, figure or sound in contacts of contactor failure.
In the device, first temperature sensor is arranged on the pole of contactor.
Further include second temperature sensor in the device, the second temperature sensor be used for rechargeable battery into
The environment temperature of contactor is detected when entering constant-current charging phase；The output end of the second temperature sensor is electrically connected with processing circuit
It connects.
In the device, the processing circuit chooses preset temperature rise threshold value, the environment according to the environment temperature
Temperature is higher, and temperature rise threshold value is smaller.
According to a second aspect of the present application, this application provides a kind of electric cars, comprising:
Rechargeable battery；
Charging circuit, for charging to the rechargeable battery；The charging circuit includes contactor；
Above-mentioned contactor condition checkout gear.
According to the third aspect of the application, this application provides a kind of electric cars, comprising: rechargeable battery, charging circuit,
Battery management system, current sensor and at least one first temperature sensor；
The charging circuit includes at least one contactor, and the current sensor and the contactor are connected in series；Electricity
Two voltage detection terminals of pond management system are electrically connected with the front-end and back-end of contactor respectively；First temperature sensor is set
Set on the pole of contactor, the output end of first temperature sensor, current sensor output end and battery management
System electrical connection.
It further include combination instrument in the electric car, the battery management system is electrically connected with the combination instrument.
In the electric car, the charging circuit includes: first contactor, second contactor, third contactor,
Four contactors and preliminary filling resistance；The rear end of anode connection first contactor, the rear end of second contactor and the third of rechargeable battery
The rear end of contactor, the anode of the front end connection external power supply of first contactor, the front end of second contactor is by passing through preliminary filling
Resistance connects anode and the front end of first contactor of external power supply；The anode of the front end connection external power supply of third contactor；
The cathode of rechargeable battery connects the rear end of the 4th contactor by current sensor, and the front end of the 4th contactor connects external power supply
Cathode.
In the electric car, including three first temperature sensors, first temperature sensor include heat
Quick resistance, three thermistors are separately positioned on the pole of first contactor, on the pole of third contactor and the 4th connects
On the pole of tentaculum；The battery management system includes processing circuit and three voltage detecting circuits；Three voltage detecting circuits
Front end of the first input end respectively with the front end of first contactor, the front end of third contactor and the 4th contactor be electrically connected
Connect, the second input terminal of three voltage detecting circuits respectively with the rear end of first contactor, the rear end of third contactor and
The rear end of four contactors is electrically connected；The output end of first temperature sensor, the output end of current sensor and voltage detecting circuit
Output end be electrically connected with processing circuit.
It further include battery system block terminal and second temperature sensor in the electric car；The second temperature passes
Sensor and charging circuit are arranged in battery system block terminal；The output end of the second temperature sensor is electrically connected with processing circuit
It connects；Temperature that the processing circuit is detected according to the variation of thermistor resistance value, second temperature sensor, voltage detecting circuit
The electric current that voltage, the current sensor detected detects obtains the state of contactor.
The beneficial effects of the utility model are:
The utility model provides a kind of detection device of the contactor state of electric car and its battery charger, packet
Include: the first temperature sensor, the current sensor of electric current for detecting contactor, voltage for detecting contactor voltage
Detection circuit and processing circuit.First temperature sensor detects the temperature of contactor when rechargeable battery enters constant-current charging phase
Spend T0, and detect the current temperature T of contactort.Processing circuit calculates Current Temperatures TtEnter constant-current charging phase with rechargeable battery
When temperature T0Difference △ T；The contact resistance of contactor is obtained according to the voltage and current；According to the contact resistance,
Preset resistance threshold, the difference △ T and preset temperature rise threshold value obtain the state of contactor.As it can be seen that realizing to contact
The detection of device state improves the safety of rechargeable battery charging.
Detailed description of the invention
Fig. 1 is the structural block diagram of the detection device of contactor state provided by the utility model；
Fig. 2 is the structural block diagram of processing circuit in the detection device of contactor state provided by the utility model；
Fig. 3 is the circuit diagram of the detection device of contactor state in electric car provided by the utility model.
Specific embodiment
The utility model is described in further detail below by specific embodiment combination attached drawing.It is wherein different to implement
Similar component uses associated similar element numbers in mode.In the following embodiments, many datail descriptions are
In order to enable the application can be better understood.However, those skilled in the art can recognize without lifting an eyebrow, it is part of
Feature is dispensed in varied situations, or can be substituted by other elements, material, method.In some cases,
The relevant some operations of the application are there is no display in the description or describe, this is the core in order to avoid the application
It is flooded by excessive description, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary,
They can completely understand relevant operation according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine in any suitable way
Kind embodiment.Meanwhile each step in method description or movement can also can be aobvious and easy according to those skilled in the art institute
The mode carry out sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary sequence, and wherein some sequentially must comply with unless otherwise indicated.
As shown in Figure 1, contactor condition checkout gear provided by the present application is used in charging circuit 20 to rechargeable battery 10
When charging, the state of contactor 210 in charging circuit 20 is detected, contactor 210 is used to control the on-off of charging circuit.Detection dress
Setting includes: current sensor 30, processing circuit 40, voltage detecting circuit 50, the first temperature sensor 60 and second temperature sensing
Device 70.
First temperature sensor 60, for detecting the temperature of contactor 210 when rechargeable battery 10 enters constant-current charging phase
Spend T0；And detect the current temperature T of contactor 210t.For example, charging circuit 20 is when starting to 10 constant-current charge of rechargeable battery,
Trigger the temperature T of the first temperature sensor 60 detection contactor 2100.Later, 60 real-time detection contactor of the first temperature sensor
210 current temperature TtOr the temperature T that separated in time detection contactor 210 is currentt.First temperature sensor 60 can be set
It sets on the pole of contactor 210, it is easy to detect using pole temperature as the temperature of contactor 210.Pole is contactor 210
Front end terminal or rear end terminal.
Current sensor 30, for detecting the electric current of contactor 210.
Voltage detecting circuit 50, for detecting the voltage of contactor 210.
Processing circuit 40, for calculating Current Temperatures TtEnter temperature T when constant-current charging phase with rechargeable battery 100's
Difference △ T, i.e. △ T=Tt-T0；The contact resistance of contactor 210 is obtained according to the voltage and current；According to the contact electricity
Resistance, preset resistance threshold, the difference △ T and preset temperature rise threshold value obtain the state of contactor 210, for example, this implementation
By comparing difference △ T and preset temperature rise threshold described in the size of the contact resistance and preset resistance threshold, comparison in example
The size of value obtains the state of contactor 210 according to comparison result.When charging circuit 20 charges to rechargeable battery 10, contact
Device 210 is in closed state, and temperature rise and resistance are ideally smaller, and the utility model is existed by detecting contactor 210
Constant-current charging phase start after temperature rise and resistance, realize the detection to its state, improve rechargeable battery charging safety
Property.The utility model selects constant-current charging phase to detect the state of contactor 210, it is ensured that calculation of contact resistance it is accurate
Property.Furthermore, it is possible to realize to the real time monitoring of contactor state, can also be spaced by obtaining temperature rise in real time and being handled
Certain time obtains temperature rise and is handled, and the treating capacity of information is reduced in the case where ensureing contactor condition monitoring demand.
In the present embodiment, the first input end of voltage detecting circuit 50 is electrically connected with the front end of contactor 210, voltage detecting
Second input terminal of circuit 50 is electrically connected with the rear end of contactor 210, in other words, voltage detecting circuit 50 and contactor 210
It is in parallel.The output end of voltage detecting circuit 50 is electrically connected with processing circuit 40.Voltage detecting circuit 50 acquires 210 front and back of contactor
The voltage at end is respectively U0、U1, then the voltage of contactor 210 is U0-U1.When rechargeable battery 10 charges, 210 front end of contactor electricity
Pressure is higher than rear end voltage.
Current sensor 30 and contactor 210 are connected in series；The output end of first temperature sensor 60, second temperature sensing
The output end of device 70 and the output end of current sensor 30 are equally electrically connected with processing circuit 40.
As shown in Fig. 2, processing circuit 40 includes: difference computational unit 410, resistance calculations unit 420 and judging unit
430。
Difference computational unit 410, for calculating Current Temperatures TtEnter temperature T when constant-current charging phase with rechargeable battery0
Difference △ T.The input terminal of difference computational unit 410 is electrically connected with the first temperature sensor 60, difference computational unit 410 it is defeated
Outlet is electrically connected with the first input end of judging unit 430.
Resistance calculations unit 420, the voltage and contactor 210 of the contactor 210 for being exported according to voltage detecting circuit
Electric current obtain the contact resistance of contactor 210, that is, according to formulaThe contact electricity of contactor 210 is calculated
Hinder R, wherein I is the electric current of contactor.The calculating of contact resistance R can have one group of voltage U0-U1, electric current I be calculated, can also
By multiple groups voltage U0-U1, electric current I calculate after be averaged to obtain, the present embodiment use the latter, to improve the standard of contact resistance R
True property.The input terminal of resistance calculations unit 420 is electrically connected with voltage detecting circuit, the output end of resistance calculations unit 420 with sentence
The second input terminal electrical connection of disconnected unit 430.
Judging unit 430, for the size of the contact resistance R and preset resistance threshold, the difference
The size of △ T and preset temperature rise threshold value；It is less than the resistance threshold in the contact resistance R, and the difference △ T is less than institute
When stating temperature rise threshold value, it is believed that contacts of contactor does not fail；It is greater than the resistance threshold, and the difference in the contact resistance R
When △ T is greater than the temperature rise threshold value, it is believed that contacts of contactor failure；It is less than the resistance threshold, and institute in the contact resistance R
When stating difference △ T greater than the temperature rise threshold value, it is believed that there are failure risks for contacts of contactor；It is greater than institute in the contact resistance R
State resistance threshold, and when the difference △ T is less than the temperature rise threshold value, it is believed that there are failure risks for contacts of contactor.The electricity
Resistance threshold value can be configured according to contactor model, for example, resistance threshold is the electricity normally contacted that contactor manufacturer provides
The upper limit between resistance value, or the resistor tracks that normally contacts.
Second temperature sensor 70 is for detecting the environment temperature of contactor 210 when rechargeable battery enters constant-current charging phase
Spend Te.The output end of second temperature sensor 70 is electrically connected with processing circuit 40.Judging unit 430 is in the difference
Before the size of △ T and preset temperature rise threshold value, preset temperature rise threshold value, the environment temperature are chosen according to the environment temperature Te
Degree Te is higher, and temperature rise threshold value is smaller.Different environment temperature Te corresponds to different temperature rise threshold values, by environment temperature to contactor shape
The influence of state is taken into account, and the accuracy of contactor state-detection is further improved, and improves the safety of charging.
As depicted in figs. 1 and 2, contactor condition checkout gear further includes human-computer interaction device 80, human-computer interaction device 80
It is electrically connected, is used in contacts of contactor failure, in the form of light, text, figure or sound with the output end of judging unit 430
The warning to need repairing is issued, enables users to handle in time, avoids that more serious accident occurs.
Further, contactor 210 can be high voltage connector, and charging circuit 20 is the charging circuit of electric car.This
Embodiment is described in detail by taking electric car as an example, wherein electric car includes pure electric automobile and oil electric mixed dynamic vapour
Vehicle.As shown in figure 3, electric car includes battery system block terminal (BDU) and rechargeable battery 10, battery system block terminal (BDU)
Inside it is provided with charging circuit 20.Battery management system BMS, current sensor 30, the first temperature sensor 60, second temperature sensing
Device 70 and human-computer interaction device 80 constitute above-mentioned contactor condition checkout gear.Battery management system BMS may be provided at battery
In or beyond system power box (BDU).
Charging circuit 20 includes at least four contactor and preliminary filling resistance R1.Contactor is for being switched on and off where it
Charge circuit.In the present embodiment, after the anode of rechargeable battery 10 connects the rear end of first contactor KM1, second contactor KM2
The rear end at end and third contactor KM3, the anode of the front end connection external power supply of first contactor KM1, second contactor KM2's
Front end is by passing through the anode of preliminary filling resistance R1 connection external power supply and the front end of first contactor KM1.Third contactor KM3's
The anode of front end connection external power supply.After the cathode of rechargeable battery 10 connects the 4th contactor KM0 by current sensor 30
End, the cathode of the front end connection external power supply of the 4th contactor KM.Wherein, first contactor KM1, rechargeable battery 10 and the 4th connect
The circuit that tentaculum KM0 is constituted is used for the normal charge of rechargeable battery 10.Preliminary filling resistance R1, second contactor KM2, rechargeable battery 10
It is used to charge to the bus capacitor of external on-board high-voltage device with the circuit that the 4th contactor KM0 is constituted, be first attracted after charging in advance
KM1 cuts off KM2 again, i.e., rechargeable battery 10 enters normal charge after the completion of preliminary filling.Third contactor KM3, rechargeable battery 10 and
The circuit that four contactor KM0 are constituted is used for the fast charge of rechargeable battery 10.In the present embodiment, first contactor KM1, second contactor
KM2, third contactor KM3 and the 4th contactor KM4 are automobile-used high voltage connector, for example, the range of operating voltage is in 60V-
The contactor of 600V direct current.
In the present embodiment, second temperature sensor 70 is thermistor NTC0, is arranged inside BDU, the BDU that will test
Environment temperature of the internal temperature as each contactor.First temperature sensor 60 can equally use thermistor, this reality
It applies in example, anode three contactors of connection of rechargeable battery 10, therefore three thermistors is set to detect three contactors respectively
Temperature rise；It is respectively: the first thermistor NTC1 on the pole of first contactor KM1 is set, is arranged in third contactor
The second thermistor NTC2 on the pole of the KM3 and third thermistor NTC3 being arranged on the pole of the 4th contactor KM0.
Temperature is detected using thermistor, circuit is simple and reliable.As it can be seen that the electric car of the utility model, mainly conventional to control
Charging, fast charge charging and the contactor connecting with negative electrode of chargeable battery carry out state-detection, when failing so as to it when energy first
Between know, improve the safety of electric car.
Battery management system BMS is used to control the on-off of each contactor, and to each automobile-used high-tension connector state
It is monitored comprising processing circuit 40 and voltage detecting circuit 50 as described above.First input of voltage detecting circuit 50
End and the second input terminal are electrically connected with the front-end and back-end of contactor respectively as two voltage detection terminals of battery management system BMS
It connects.Wherein, the function of processing circuit 40 can be realized by single-chip microcontroller or programmable gate array, can also be realized by logic circuit,
For example, difference computational unit 410 realizes the operation of temperature gap using subtraction circuit, resistance calculations unit 420, which uses, to be multiplied
Musical instruments used in a Buddhist or Taoist mass and operational amplifier realize the operation that voltage, electric current are divided by, and judging unit is using logic circuit or comparator circuit come real
The judgement etc. of existing contactor state.
Contactor condition checkout gear includes three voltage detecting circuits 50；The first input end of three voltage detecting circuits
It is electrically connected respectively with the front end of the front end of first contactor KM1, the front end of third contactor KM3 and the 4th contactor KM0, three
Second input terminal of a voltage detecting circuit respectively with the rear end of first contactor KM1, the rear end of third contactor KM3 and
The rear end of four contactor KM0 is electrically connected.
Human-computer interaction device 80 uses combination instrument, is used to show whole vehicle state information, informs user's whole vehicle state.Place
It manages circuit 40 and risk is reported to the car running computer of vehicle there are when failure risk in contacts of contactor, and pass through combination instrument
Prompt user is further detected；In contacts of contactor failure, failure is reported to the car running computer of vehicle, and pass through group
Closing instrument prompt user goes to related maintenace point to repair.Certainly, processing circuit 40, can be with when contacts of contactor fails
The contactor of control failure makes its disconnection, stops charging.
As it can be seen that electric car provided by the utility model, can be monitored the state of contacts of contactor, it is ensured that contactor
It can be monitored out after contact failure, improve the safety of electric car.
Use above specific case is illustrated the utility model, is merely used to help understand the utility model, and
Not to limit the utility model.Think of for those skilled in the art of the present invention, according to the utility model
Think, several simple deductions, deformation or replacement can also be made.
Claims (13)
1. a kind of contactor condition checkout gear of battery charger characterized by comprising
First temperature sensor, for when rechargeable battery enters constant-current charging phase, detecting the temperature T of contactor0, and detect
The current temperature T of contactort；
Current sensor, for detecting the electric current of contactor；
Voltage detecting circuit, for detecting the voltage of contactor；
Current sensor and contactor are connected in series；The first input end of voltage detecting circuit is electrically connected with the front end of contactor,
Second input terminal of voltage detecting circuit is electrically connected with the rear end of contactor；Output end, the current sense of first temperature sensor
The output end of device and the output end of voltage detecting circuit are electrically connected with processing circuit；
Processing circuit, for calculating Current Temperatures TtEnter temperature T when constant-current charging phase with rechargeable battery0Difference △ T；
The contact resistance of contactor is obtained according to the voltage and current；According to the contact resistance, preset resistance threshold, the difference
Value △ T and preset temperature rise threshold value obtain the state of contactor.
2. device as described in claim 1, which is characterized in that the processing circuit includes:
Difference computational unit, for calculating Current Temperatures TtEnter temperature T when constant-current charging phase with rechargeable battery0Difference
△T；
Resistance calculations unit, for obtaining the contact resistance of contactor according to the voltage and current；
Judging unit, for the size of the contact resistance and preset resistance threshold, the difference △ T and default
Temperature rise threshold value size；It is less than the resistance threshold in the contact resistance, and the difference △ T is less than the temperature rise threshold value
When, it is believed that contacts of contactor does not fail；It is greater than the resistance threshold in the contact resistance, and the difference △ T is greater than described
When temperature rise threshold value, it is believed that contacts of contactor failure；
The input terminal of difference computational unit is electrically connected with the first temperature sensor, the output end and judging unit of difference computational unit
Electrical connection；The input terminal of resistance calculations unit is electrically connected with voltage detecting circuit, and the output end of resistance calculations unit and judgement are single
Member electrical connection.
3. device as claimed in claim 2, which is characterized in that the judging unit is also used to: being less than in the contact resistance
The resistance threshold, and the difference △ T be greater than the temperature rise threshold value when, it is believed that there are failure risks for contacts of contactor；Institute
Contact resistance is stated greater than the resistance threshold, and when the difference △ T is less than the temperature rise threshold value, it is believed that contacts of contactor exists
Failure risk.
4. device as claimed in claim 2, which is characterized in that further include human-computer interaction device, the human-computer interaction device with
The output end of judging unit is electrically connected, for being issued in the form of light, text, figure or sound in contacts of contactor failure
The warning to need repairing.
5. device as described in claim 1, which is characterized in that the pole of contactor is arranged in first temperature sensor
On.
6. device as described in claim 1, which is characterized in that it further include second temperature sensor, the second temperature sensing
Device is for detecting the environment temperature of contactor when rechargeable battery enters constant-current charging phase；The second temperature sensor it is defeated
Outlet is electrically connected with processing circuit.
7. device as claimed in claim 6, which is characterized in that the processing circuit is chosen preset according to the environment temperature
Temperature rise threshold value, the environment temperature is higher, and temperature rise threshold value is smaller.
8. a kind of electric car characterized by comprising
Rechargeable battery；
Charging circuit, for charging to the rechargeable battery；The charging circuit includes contactor；
Contactor condition checkout gear as described in any one of claim 1-7.
9. a kind of electric car characterized by comprising rechargeable battery, charging circuit, battery management system, current sensor
And at least one first temperature sensor；
The charging circuit includes at least one contactor, and the current sensor and the contactor are connected in series；Cell tube
Two voltage detection terminals of reason system are electrically connected with the front-end and back-end of contactor respectively；The first temperature sensor setting exists
On the pole of contactor, the output end of first temperature sensor, current sensor output end and battery management system
Electrical connection.
10. electric car as claimed in claim 9, which is characterized in that further include combination instrument, the battery management system with
The combination instrument electrical connection.
11. electric car as claimed in claim 9, which is characterized in that the charging circuit includes: first contactor, second
Contactor, third contactor, the 4th contactor and preliminary filling resistance；The rear end of the anode connection first contactor of rechargeable battery, the
The rear end of two contactors and the rear end of third contactor, the anode of the front end connection external power supply of first contactor, the second contact
The front end that the front end of device passes through anode and first contactor by preliminary filling resistance connection external power supply；The front end of third contactor
Connect the anode of external power supply；The cathode of rechargeable battery connects the rear end of the 4th contactor, the 4th contact by current sensor
The cathode of the front end connection external power supply of device.
12. electric car as claimed in claim 11, which is characterized in that described including three first temperature sensors
First temperature sensor includes thermistor, and three thermistors are separately positioned on the pole of first contactor, third contacts
On the pole of device and on the pole of the 4th contactor；The battery management system includes processing circuit and three voltage detecting electricity
Road；The first input end of three voltage detecting circuits respectively with the front end of first contactor, the front end of third contactor and
The front ends of four contactors is electrically connected, the second input terminal of three voltage detecting circuits respectively with the rear end of first contactor, third
The rear end of contactor and the electrical connection of the rear end of the 4th contactor；The output end of first temperature sensor, current sensor it is defeated
The output end of outlet and voltage detecting circuit is electrically connected with processing circuit.
13. electric car as claimed in claim 12, which is characterized in that further include that battery system block terminal and second temperature pass
Sensor；The second temperature sensor and charging circuit are arranged in battery system block terminal；The second temperature sensor
Output end is electrically connected with processing circuit；The processing circuit is detected according to the variation of thermistor resistance value, second temperature sensor
To temperature, the electric current that detects of the voltage detecting circuit voltage, the current sensor that detect obtain the state of contactor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821545692.8U CN208855459U (en) | 2018-09-20 | 2018-09-20 | A kind of detection device of the contactor state of electric car and its battery charger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821545692.8U CN208855459U (en) | 2018-09-20 | 2018-09-20 | A kind of detection device of the contactor state of electric car and its battery charger |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109177808A (en) * | 2018-09-20 | 2019-01-11 | 广州小鹏汽车科技有限公司 | The detection method and device of the contactor state of electric car, battery charger |
| CN112092681A (en) * | 2020-11-10 | 2020-12-18 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Energy input and output monitoring device for hydrogen fuel cell power system |
| CN112305415A (en) * | 2020-12-21 | 2021-02-02 | 华人运通(江苏)技术有限公司 | Method and system for monitoring service life of high-voltage contactor in real time |
| CN112485566A (en) * | 2020-11-17 | 2021-03-12 | 华人运通(江苏)技术有限公司 | State detection circuit and state detection method of direct-current quick-charging contactor |
| CN112904190A (en) * | 2021-01-07 | 2021-06-04 | 武汉众宇动力系统科技有限公司 | Contactor failure detection method and contactor failure detection system |
| CN113246736A (en) * | 2021-04-14 | 2021-08-13 | 合肥国轩高科动力能源有限公司 | High-compatibility BDU system, positive module, negative module and quick charging module |
| CN113330323A (en) * | 2020-10-21 | 2021-08-31 | 深圳欣锐科技股份有限公司 | Contactor state detection circuit, system and vehicle |
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2018
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109177808A (en) * | 2018-09-20 | 2019-01-11 | 广州小鹏汽车科技有限公司 | The detection method and device of the contactor state of electric car, battery charger |
| CN109177808B (en) * | 2018-09-20 | 2023-08-29 | 广州小鹏汽车科技有限公司 | Method and device for detecting state of contactor of electric automobile and battery charging circuit |
| CN113330323A (en) * | 2020-10-21 | 2021-08-31 | 深圳欣锐科技股份有限公司 | Contactor state detection circuit, system and vehicle |
| CN112092681A (en) * | 2020-11-10 | 2020-12-18 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Energy input and output monitoring device for hydrogen fuel cell power system |
| CN112485566A (en) * | 2020-11-17 | 2021-03-12 | 华人运通(江苏)技术有限公司 | State detection circuit and state detection method of direct-current quick-charging contactor |
| CN112485566B (en) * | 2020-11-17 | 2023-12-29 | 华人运通(江苏)技术有限公司 | State detection circuit and state detection method of direct-current quick-charging contactor |
| CN112305415A (en) * | 2020-12-21 | 2021-02-02 | 华人运通(江苏)技术有限公司 | Method and system for monitoring service life of high-voltage contactor in real time |
| CN112305415B (en) * | 2020-12-21 | 2023-12-29 | 华人运通(江苏)技术有限公司 | Real-time monitoring method and system for service life of high-voltage contactor |
| CN112904190A (en) * | 2021-01-07 | 2021-06-04 | 武汉众宇动力系统科技有限公司 | Contactor failure detection method and contactor failure detection system |
| CN113246736A (en) * | 2021-04-14 | 2021-08-13 | 合肥国轩高科动力能源有限公司 | High-compatibility BDU system, positive module, negative module and quick charging module |
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