CN207752074U - A kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device - Google Patents
A kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device Download PDFInfo
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- CN207752074U CN207752074U CN201720697341.8U CN201720697341U CN207752074U CN 207752074 U CN207752074 U CN 207752074U CN 201720697341 U CN201720697341 U CN 201720697341U CN 207752074 U CN207752074 U CN 207752074U
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Abstract
The utility model provides a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device, including electronic load module, electrical isolation module, main control module, display module；Electronic load module connects main control module, for feeding back to main control module according to input voltage regulation load resistance, and by resistance value；Electrical isolation module connects main control module, and for the high-voltage electricity of input to be converted to low-voltage signal, electrical isolation module is also connected with high voltage bus；Main control module connects display module, is shown for exporting result；Main control module is also connected with control panel.The utility model provides a kind of for the safety test equipment with the electric vehicle automatically powered off after experiment, the accurate measurement with realization to electric automobile direct-current high-voltage busbar load end residual electric energy；The discharge resistance that the utility model uses uses the dynamically changeable resistance of security isolation control, and the measurement result of residual electric energy more tallies with the actual situation, and measurement result is more accurate.
Description
Technical field
The utility model belongs to electric vehicle passive security technical field of measurement and test, more particularly, to a kind of electric vehicle direct current
High voltage bus residual electric energy measuring device.
Background technology
After electric vehicle completes impact test, need to carry out electric safety test to its high voltage bus.Wherein, vehicle loads
End residual electric energy is measured as an important performance assessment criteria.In order to measure the value, can realize by the following method：
In the case of known vehicle nominal voltage and load end equivalent capacity, vehicle is calculated using formula (1)
Residual electric energy.
In formula：U1For vehicle nominal voltage, U2For safe voltage, C is vehicle load end equivalent capacity.
U in formula1And U2For known quantity, it is thus necessary to determine that load end equivalent capacity C.Since the capacitance is in vehicle circuitry
One equivalent capacitance value, is difficult to determine in actual mechanical process.Therefore, which is difficult to realize on the implementation.
Currently, domestic also not about the correlation text of high direct voltage busbar residual electric energy test equipment after electric automobile collision
It offers.
Utility model content
In view of this, the utility model is directed to a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device,
Electric automobile direct-current high-voltage busbar load end residual electric energy is accurately calculated with realizing.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device, including shell, the shell are equipped with control plane
Plate further includes the circuit board of setting inside the shell, electronic load module, electrical isolation module, master is integrated on the circuit board
Control module, display module；
The electronic load module connects main control module, for according to input voltage regulation load resistance, and by resistance value
Feed back to main control module；
The electrical isolation module connects main control module, for the high-voltage electricity of input to be converted to low-voltage signal, the electricity
Gas isolation module is also connected with high voltage bus；
The main control module connects display module, is shown for exporting result；
The main control module is also connected with control panel.
Further, it is additionally provided on the shell
First cable：Connect electric vehicle REESS high voltage bus positive terminals；
Second cable：Connect electric vehicle REESS high voltage bus negative pole ends；
Third cable：Connect electric vehicle electricity chassis；
Data acquisition interface：It is connect with data acquisition equipment, for VB after record collision, tri- values of V1, V2；
5 volts of charging interfaces：For giving equipment charge, used for internal circuit and display screen；
Power failure lamp：Whether powered off for high-tension system after judging experiment；
Trigger interface：Residual electric energy tests trigger switch, that is, collides 0 time-ofday signals.
Further, the main control module uses microcontroller main control module, the microcontroller main control module to use 16 lists
Piece machine includes AD analog-to-digital conversion modules, input, output control module, data communication module and calculation process module.
Further, the electronic load module uses MOSFET element, the device to be used as control short-circuit test electric current
Size automatically adjusts the size of short-circuit resistance according to the size of short-circuit voltage.
Further, the isolation module uses optically isolated amplifier device or electromagnetic isolation amplifier device, realization pair
Physical isolation between electronic load itself and the microcontroller of control electronic load.
Compared with the existing technology, a kind of electric automobile direct-current high-voltage busbar residual electric energy described in the utility model measures dress
It sets and has the advantage that：
(1) the utility model provides a kind of be directed to, and there is the safety test of the electric vehicle automatically powered off after experiment to set
It is standby, to realize the accurate measurement to electric automobile direct-current high-voltage busbar load end residual electric energy；
(2) discharge resistance that the utility model uses uses the dynamically changeable resistance of security isolation control, residual electric energy
Measurement result more tally with the actual situation, measurement result is more accurate.
Description of the drawings
The attached drawing for constituting the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The illustrative embodiments and their description of type are not constituted improper limits to the present invention for explaining the utility model.
In attached drawing：
Fig. 1 is a kind of equipment of electric automobile direct-current high-voltage busbar residual electric energy measuring device described in the embodiment of the present invention
Circuit connection diagram；
Fig. 2 is the schematic diagram of the control panel described in the embodiment of the present invention；
Fig. 3 is the circuit structure diagram of the microcontroller main control module described in the embodiment of the present invention；
Fig. 4 is the voltage sample and bleeder circuit structure chart of the electronic load module described in the embodiment of the present invention；
Fig. 5 is the circuit structure diagram of the isolation control of the electronic load module described in the embodiment of the present invention；
Fig. 6 is the circuit structure diagram of the high tension voltage isolation of the electronic load module described in the embodiment of the present invention；
Fig. 7 is the circuit structure diagram of the power supply changeover device of the electronic load module described in the embodiment of the present invention；
Fig. 8 is the core circuit structure diagram of the electronic load module described in the embodiment of the present invention
Fig. 9 is the circuit structure diagram of the isolating device of the electromagnetic type described in the embodiment of the present invention；
Figure 10 is the circuit structure diagram of the photovoltaic isolating device described in the embodiment of the present invention；
Figure 11 is the circuit structure diagram of the display module described in the embodiment of the present invention.
Reference sign：
The chassis 1-；The first cables of 2-；The second cables of 3-；4- third cables；5-5 lies prostrate charging interface；6- power failure lamps；
7- trigger switch.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more this feature.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
The utility model be solve to the electric vehicle with automatic circuit break function after completing impact test, can to its bear
It carries end residual electric energy and carries out automatic measurement, and according to the power requirements provided in GB/T 31498-2015, automatic discriminating test vehicle
Whether meet laws and regulations requirement.
The utility model provides a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device, and the measuring device is main
Be utilized dynamic electronic load electric discharge integrating circuit, feature be single-chip microprocessor MCU to high voltage bus voltage and short circuit current into
Row detection in real time, then adjusts the size of MOSFET element conducting resistance in real time by algorithm, to ensure what integrating circuit calculated
Accuracy.In addition, the residual electric energy that the device can obtain measurement passes through liquid crystal display real-time display.In addition to this, may be used also
The control to integrating discharge measuring start time point and end time point is realized according to the demand used.
Device is mainly made of 5 parts, including control panel and interface section, main control module, electronic load module, electrical
Isolation module and display module, panel and interface provide the safe interface of docking high voltage bus, docking data collecting system
Solid interface, and control switch, indicator light and display screen etc. are used for the interface of human-computer interaction.User's wiring on panel,
Operate and check result.Electronic load module is responsible for the short circuit operation in power test and current integration calculating operation.Electrically every
From the high-pressure system and equipment that module is used for isolation test vehicle, ensure operator, instrument itself and data collecting system
Safety.Display module is used for the display of human-computer interaction and test result.Main control module is the core of whole equipment, is responsible for insulated electro
Resistance measures and the realization of current integration algorithm, in addition, realizing corresponding control strategy by receiving the signal of each control switch.
Device connection diagram is as shown in Figure 1.
The control panel of measuring device is as shown in Fig. 2, each interface function is as follows：
First cable 2：Connect electric vehicle REESS high voltage bus positive terminals.
Second cable 3：Connect electric vehicle REESS high voltage bus negative pole ends.
Third cable 4：Connect electric vehicle electricity chassis 1 (vehicle frame).
Number adopts interface：Equipment is adopted with number to connect, for VB after record collision, tri- values of V1, V2.
5 volts of charging interfaces 5：For giving equipment charge, used for internal circuit and display screen.
Power failure lamp 6：Whether powered off for high-tension system after judging experiment.
Trigger switch 7：Residual electric energy tests trigger switch, that is, collides 0 time-ofday signals.
Operation and display panel are designed with safe and convenient as design aim.It can be to electric automobile high-voltage busbar on panel
The value of VB, V1 and V2 carry out real-time display, the observation of personnel easy to operation and record.In terms of the Interface design of cable, also with
It is safely and conveniently design aim.For the interface section of high voltage cable, use aerospace connectors, and with anti-error electric shock and
The design of interface reversal connection.
Fig. 3 is main control module：Microcontroller main control module uses 16 microcontrollers, includes AD analog-to-digital conversion modules, inputs, is defeated
Go out control module, data communication module and calculation process module.The module realized to high voltage bus voltage using single-chip microprocessor MCU and
Short circuit current is measured in real time, and adjusts the size of MOSFET element conducting resistance in real time by algorithm.Moreover, it is achieved that adopting
The AD conversion of sample electric current and sampled voltage, and the integral operation to residual electric energy.
Fig. 4-7 is the circuit diagram of electronic load module：The module be one kind can be used for high voltage Larger Dynamic wide security every
Dynamic electronic load from control.The high-voltage MOSFET that electronic load is up to 1000V by VDS is realized.By microcontroller to be isolated
Voltage-controlled mode realizes its grid source VGS voltage across poles of dynamic control, to realize the adjustment to conducting resistance size.Electronics
Load blocks use MOSFET element, the device to be used as the size of control short-circuit test electric current.According to the size of short-circuit voltage, certainly
The dynamic size for adjusting short-circuit resistance.The excessive or too small situation of short circuit current is prevented, to improve the accurate of test result
Property.MOSFET element uses IRF high-voltage MOS pipe IRFPG42, and the maximum working voltage of the device is 1000V.Fig. 8 is Electronic Negative
Carry module core partial circuit diagram.VREF connects the DA digital-to-analogue units of main control module.
Isolation module use optically isolated amplifier device or electromagnetic isolation amplifier device, realize to electronic load itself with
Control the physical isolation between the microcontroller of electronic load.Isolation module is extremely important in this equipment, on the one hand can ensure
On the other hand the safety of tester can also protect other modules and equipment not to be damaged by high pressure.It is used respectively in equipment
The isolating device AD201 of the electromagnetic type and isolating device AVAGO ACPL-C870 of photovoltaic, high direct voltage is by resistance point
After the partial pressure of volt circuit, other modules of equipment are transmitted to by isolating device, and direct ratio is generated in the other end of optically isolated barrier
In the differential output voltage of input voltage, which provides signal for data collecting system.The characteristics of electromagnetic isolation mode is
Adjustable input voltage range is wide, and the control terminal for electronic load is isolated.The characteristics of Phototube Coupling mode is the body of device
Product is small, and strong interference immunity, the isolation end for high pressure partial pressure.Fig. 9 and Figure 10 is respectively electromagnetic isolation device and photovoltaic
The structure chart of isolating device AVAGO ACPL-C870.
Figure 11 is display module：The module can realize the real-time display to high voltage bus voltage Vb, V1 and V2.In addition,
It can show the test result of residual electric energy.Display module is by 3 pieces 3 half tape symbol LED red displays screens and one piece of 128x64
The OLED display screen of dot matrix forms.The red display screen of LED is used for the real-time display to VB, V1 and V2.OLED display screen is used for
Display to result of calculation.3 half LED displays are driven using ICL7107 by IO.The OLED screen of 128x64 dot matrix is adopted
It is driven with the mode of SPI.
In measurement process, the high voltage bus of electric vehicle and ground wire by the aviation plug access device on panel,
The corresponding interface is designed on panel simultaneously, is convenient for the measurement of megameter.When electric vehicle collides, connected by trigger switch
Equipment provides collision zero moment for the calculating of test equipment.After the positive and negative electrode of high-tension battery packet and electric chassis access device, meeting
By following 3 parts.
One, using the partial pressure of precision resistance and the security isolation of photovoltaic, obtain 1/500 VB, the safety of V1, V2
Component of voltage (VB be high-tension battery positive and negative pole tension, V1 be high-tension battery negative pole end to electric chassis voltage, V2 is high-voltage electricity
The positive terminal in pond is to electric chassis voltage, hereinafter referred to as VB, V1, V2), realize the real-time monitoring to high-tension system, and by aobvious
3 voltage values of display screen pair carry out real-time display；
Two, by electronic switch, it is connected to by monolithic processor controlled electronic load module, when microcontroller receives collision
When rear zero moment, control interlock circuit carries out the integral discharge test of residual electric energy；
Three, by the switching of electronic switch, a known resistance R is accessed in circuit, and access resistance R is recorded by microcontroller
Voltage value afterwards, and calculate insulation resistance using scaling method.
When the toggle switch on panel is ' measure insulating coefficient ', and presses testing button, equipment can automatically will be known
Resistance R is respectively connected to high-tension battery positive terminal and level platform (yellow indicator lamp is bright), high-tension battery negative pole end and level platform (green
Indicator light is bright).V1 and V2 can change at this time, respectively obtain V1 ' and V2 '.After obtaining corresponding voltage value, equipment can be automatic
Record, and bring formula calculating into, and the test result of insulation resistance is shown to display screen, unit at this time is Ω/V.Face to face
When toggle switch on plate is ' measuring electric energy ', after colliding, equipment can be according to the requirement of setting, when as defined in arrival
Between after, by microcontroller control electronic load carry out integral discharge test.Finally, the test result of residual electric energy can be shown in display
On screen, unit is joule.In the entire test of equipment and calculating process, VB, V1 and V2 pass through display screen real-time display.It touches
After hitting, if the high-tension system of electric vehicle carries automatic circuit break function, in order to measure the insulation resistance at vehicle load end,
Megameter can be utilized by the interface on panel, measure the insulation resistance value between high voltage bus positive and negative electrode and level platform respectively.
After the completion of impact test, by the measuring device connecting electric automobile high voltage bus, the residual electric energy of vehicle can lead to
The voltage for measuring discharge resistance both ends is crossed, is calculated using electric energy calculation formula.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (5)
1. a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device, including shell, the shell is equipped with control panel,
Further include the circuit board of setting inside the shell, it is characterised in that：Electronic load module, electrical isolation are integrated on the circuit board
Module, main control module, display module；
The electronic load module connects main control module, for being fed back according to input voltage regulation load resistance, and by resistance value
To main control module；
The electrical isolation module connects main control module, for the high-voltage electricity of input to be converted to low-voltage signal, it is described electrically every
It is also connected with high voltage bus from module；
The main control module connects display module, is shown for exporting result；
The main control module is also connected with control panel.
2. a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device according to claim 1, it is characterised in that：
It is additionally provided on the shell
First cable：Connect electric vehicle REESS high voltage bus positive terminals；
Second cable：Connect electric vehicle REESS high voltage bus negative pole ends；
Third cable：Connect electric vehicle electricity chassis；
Data acquisition interface：It is connect with data acquisition equipment, for VB after record collision, tri- values of V1, V2；
5 volts of charging interfaces：For giving equipment charge, used for internal circuit and display screen；
Power failure lamp：Whether powered off for high-tension system after judging experiment；
Trigger interface：Residual electric energy tests trigger switch, that is, collides 0 time-ofday signals.
3. a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device according to claim 1, it is characterised in that：
The main control module uses microcontroller main control module, the microcontroller main control module to use 16 microcontrollers, includes AD moduluses and turns
Change the mold block, input, output control module, data communication module and calculation process module.
4. a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device according to claim 1, it is characterised in that：
The electronic load module uses MOSFET element, which is used as the size of control short-circuit test electric current, according to short-circuit voltage
Size, automatically adjust the size of short-circuit resistance.
5. a kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device according to claim 1, it is characterised in that：
The isolation module uses optically isolated amplifier device or electromagnetic isolation amplifier device, realizes to electronic load itself and control
Physical isolation between the microcontroller of electronic load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720697341.8U CN207752074U (en) | 2017-06-15 | 2017-06-15 | A kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720697341.8U CN207752074U (en) | 2017-06-15 | 2017-06-15 | A kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207752074U true CN207752074U (en) | 2018-08-21 |
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ID=63146429
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720697341.8U Expired - Fee Related CN207752074U (en) | 2017-06-15 | 2017-06-15 | A kind of electric automobile direct-current high-voltage busbar residual electric energy measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207752074U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238771A (en) * | 2017-06-15 | 2017-10-10 | 中国汽车技术研究中心 | A kind of electric automobile direct-current high-voltage bus residual electric energy measurement apparatus and method |
| CN113238104A (en) * | 2021-03-29 | 2021-08-10 | 江铃汽车股份有限公司 | Method for detecting high-voltage safe power-off signal during automobile collision |
-
2017
- 2017-06-15 CN CN201720697341.8U patent/CN207752074U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238771A (en) * | 2017-06-15 | 2017-10-10 | 中国汽车技术研究中心 | A kind of electric automobile direct-current high-voltage bus residual electric energy measurement apparatus and method |
| CN107238771B (en) * | 2017-06-15 | 2023-11-03 | 中国汽车技术研究中心 | Device and method for measuring residual electric energy of direct-current high-voltage bus of electric automobile |
| CN113238104A (en) * | 2021-03-29 | 2021-08-10 | 江铃汽车股份有限公司 | Method for detecting high-voltage safe power-off signal during automobile collision |
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| GR01 | Patent grant | ||
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Granted publication date: 20180821 |
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| CF01 | Termination of patent right due to non-payment of annual fee |