CN203965555U - A kind of testing circuit of high-tension connector - Google Patents
A kind of testing circuit of high-tension connector Download PDFInfo
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- CN203965555U CN203965555U CN201420295100.7U CN201420295100U CN203965555U CN 203965555 U CN203965555 U CN 203965555U CN 201420295100 U CN201420295100 U CN 201420295100U CN 203965555 U CN203965555 U CN 203965555U
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Abstract
The utility model provides a kind of testing circuit of high-tension connector, comprising: driving circuit and on-off element; Driving circuit, its input end is connected on a contact of low pressure auxiliary switch of the high-tension connector of accumulator, at low pressure auxiliary switch during in different conditions, its output terminal is exported different voltage, driving switch element, in different states, is judged the state of high-tension connector by the state variation of on-off element.The utility model judges the state of high-tension connector by the state of on-off element, improve the security performance of car load.
Description
Technical field
The utility model relates to electric vehicle engineering field, relates in particular to a kind of testing circuit of high-tension connector.
Background technology
In order to reduce the dependence to traditional energy, the research of the actively developing new forms of energy problem that becomes international.At automotive field, the development to electric automobile and exploitation, be enjoying popular confidence of electric vehicle industrialization.
For electric automobile, utilize accumulator that power is provided, accumulator is realized and being electrically connected of car load miscellaneous part by high-tension connector, the duty of a large amount of inductive load of car load in large electric current, in the time that high pressure web member breaks down, for example occur getting loose etc., can cause car load high-tension electricity to interrupt suddenly, and then cause the damage of high pressure web member pitting of contact and control module, all most important for normal work and the safety of car load.
For this reason, be necessary the testing circuit of the high voltage component web member that proposes a kind of electric automobile, in the time that high pressure link occurs connecting fault, system can be monitored in time and can be taked corresponding safeguard measure, to improve the security of car load.
Utility model content
Based on the problems referred to above, the utility model provides a kind of testing circuit of high-tension connector, realizes the detection of the state of the high-tension connector of electromobile battery.
In order to achieve the above object, the utility model provides following technical scheme:
A kind of high-tension connector testing circuit, comprising: driving circuit and on-off element;
Driving circuit, its input end is connected on a contact of low pressure auxiliary switch of the high-tension connector of accumulator, at low pressure auxiliary switch during in different conditions, its output terminal is exported different voltage, driving switch element, in different states, is judged the state of high-tension connector by the state variation of on-off element.
Optionally, described on-off element is field effect transistor, the control end of the output termination field effect transistor of driving circuit.
Optionally, also comprise: d type flip flop, the current output terminal of on-off element is connected to the preset end PR of d type flip flop, is embodied the state variation of on-off element by the state variation of the output terminal of d type flip flop.
Optionally, the reset terminal of described d type flip flop is defaulted as high level, is low level when reset operation.
Optionally, described driving circuit comprises the first resistance, the second resistance, the 3rd resistance and the first electric capacity, after the first resistance and the second resistance serial connection, one end of one end and the 3rd resistance is attempted by a contact of auxiliary switch, the control end of another termination on-off element, the other end ground connection of the 3rd resistance, the first electric capacity is connected between the control end and ground of on-off element.
Optionally, between the first resistance and the second resistance and be connected to clamping circuit.
The high-tension connector testing circuit that the utility model embodiment provides, a contact of the low pressure auxiliary switch of the high-tension connector of accumulator is connected to driving circuit, at high-tension connector during in different conditions, make on-off element in different states, thereby judge the state of high-tension connector by the state of on-off element, improve the security performance of car load.
Brief description of the drawings
Fig. 1 is according to the structural representation of the testing circuit of the high-tension connector of the utility model embodiment.
Embodiment
For the above-mentioned purpose, the feature and advantage that make utility model can become apparent more, below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
A lot of details are set forth in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization without prejudice to the utility model intension in the situation that, and therefore the utility model is not subject to the restriction of following public specific embodiment.
In scheme of the present utility model, a kind of testing circuit of high-tension connector has been proposed, in this circuit, shown in figure 1, comprising: driving circuit 500 and on-off element 600; Wherein, driving circuit 500, its input end is connected on a contact of low pressure auxiliary switch 300 of the high-tension connector of accumulator, at low pressure auxiliary switch 300 during in different conditions, its output terminal is exported different voltage, driving switch element 600, in different states, is judged the state of high-tension connector by the state variation of on-off element 600.
In the utility model, a contact of the low pressure auxiliary switch of the high-tension connector of accumulator is connected to driving circuit, at high-tension connector during in different conditions, make on-off element in different states, thereby judge the state of high-tension connector by the state of on-off element, improve the security performance of car load.
In order better to understand the utility model, below will be described in detail with specific embodiment.
In the battery management system of electric motor car, normally, the folding of controlling high-voltage relay B+, always bearing relay B-, rush in advance relay Pre_chg by entire car controller 100, in the time powering on, vehicle control unit controls high-voltage relay B+, always negative relay B-is in closure state, and in the control signal of control end output certain voltage, as the control signal of 12V, make the low pressure auxiliary switch 8 of high-tension connector and the low limit of battery management system relay control end 9 in closure state; And when high-voltage relay is during in off-state, there is no voltage control signal at control end, thereby, make the low pressure auxiliary switch 8 of high-tension connector and the low limit of battery management system relay control end 9 in off-state.
In the present embodiment, the control end of entire car controller 6 connect respectively high-voltage relay B+, always negative relay B-, rush after relay Pre_chg in advance, connect successively after the low pressure auxiliary switch 8 of high-tension connector and the low limit of battery management system relay control end 9 ground connection again.
In the utility model, in the circuit of the low pressure auxiliary switch of high-tension connector, in the time that needs power on or charge, under normal circumstances, circuit will be in closure state, at a magnitude of voltage of contact place output of the low pressure auxiliary switch of high-tension connector, as shown in Figure 1, in the present embodiment, will export 0V voltage; And in the time that the low pressure auxiliary switch of high-tension connector breaks down or be abnormal, export another magnitude of voltage at the contact place of the low pressure auxiliary switch of high-tension connector, in the present embodiment, by the voltage of output high-voltage relay end, for example, be 12V.
In the present embodiment, driving circuit 500 comprises the first resistance R C3, the second resistance R C4, the 3rd resistance R C6 and the first capacitor C C1, after the first resistance R C3 and the second resistance R C4 serial connection, one end of one end and the 3rd resistance R C6 is attempted by a contact A of auxiliary switch, the control end 1 of another termination on-off element field effect transistor QC1, the other end ground connection of the 3rd resistance R C6, the first capacitor C C1 is connected between the control end 1 and ground of on-off element field effect transistor QC1.
In the present embodiment, this on-off element is field effect transistor, and this field effect transistor is n type field effect transistor, drain electrode end 3 connecting resistance RC3 and the power supply VCC successively of this n type field effect transistor QC1, source terminal 2 ground connection of n type field effect transistor QC1.
In the present embodiment, the status signal of on-off element is further by the rear output of latch cicuit 700.In the present embodiment, be connected to the preset end PR of d type flip flop UC1A from the drain electrode end 3 of field effect transistor QC1, the D end of d type flip flop and CLK end ground connection or unsettled, the reset terminal CLR of d type flip flop UC1A connects reset circuit 800, by its output terminal
output carry out the judgement of the low pressure auxiliary switch state of high-tension connector.For this output terminal
output signal; according to different design requirements; can read this output signal or be received by corresponding high tension protection circuit by the processor unit of battery management system, further be protected by hardware, the security of high-pressure system is protected.
Whether the low pressure auxiliary switch that carries out high-tension connector at this embodiment is when the judgement of fault, if in powering on or charged state, when low pressure auxiliary switch normally cuts out, in the low-voltage of contact A place output 0V, after overdrive circuit, in the low-voltage of output terminal output 0V, thereby, field effect transistor QC1 is in closed condition, and the drain electrode end 3 of field effect transistor QC1 does not have electric current, the high voltage of drain electrode end output Vcc.
And if when in powering on or charged state, when the low pressure auxiliary switch of high-tension connector does not normally cut out, at the high voltage of contact A place output 12V, after overdrive circuit, at output terminal output HIGH voltage, thereby, field effect transistor QC1 is in conducting state, the drain electrode end 3 of field effect transistor QC1 has On current, and output voltage is by high step-down, thereby can further obtain the information of its fault from the variation of this voltage.
The truth table of table 1D trigger
As table 1, in these cases, be high level, PR end during for high level at the reset terminal CLR of d type flip flop, output terminal Q will follow the pin state of PR, and in the time breaking down, PR port becomes low level from high level, and Q is high level by low level upset immediately,
for being high level by low level upset, this process realized circuit by normal operating conditions to the change procedure detecting after malfunction, in the time having there is open fault, d type flip flop pass through Q and
low pressure auxiliary switch malfunction is carried out latch by form with low and high level, by the malfunction latch of high-tension connector.
When the reseting port CLR of d type flip flop is high level, port PR is high level, and Q is low level,
during for high level; Give reseting port CLR add a low level, Q and
level state overturn separately, what thereby the system that returns to was corresponding does not have out of order state, this process is reseting procedure, can be by inputting a lasting low level at reseting port place by CLEAR FLT port, by the effect that discharges and recharges of capacitor C C3, obtain one at reseting port CLR and continue low level signal, thereby complete the reset of d type flip flop state.The power supply of d type flip flop is provided by feed circuit.
In the present embodiment, reset circuit 800 comprises successively along the earth terminal connecing, the first diode DC2, the second diode DC3, power supply VCC, resistance R C7, the first diode DC2, the second diode DC3 has formed clamp diode, by the reseting port CLR clamper of d type flip flop in the scope of 0V and power supply VCC, the output terminal of resistance R C7 and the first diode, end points between the second diode connects, and be connected to the reseting port CLR of d type flip flop from this end points, this end points place is connected with capacitor C C3, this electric capacity has input port CLEAR FLT, complete the homing action of d type flip flop to input a lasting low level.The power supply of d type flip flop is provided by feed circuit 900.
The above, be only preferred embodiment of the present utility model, not the utility model done to any pro forma restriction.
Although the utility model discloses as above with preferred embodiment, but not in order to limit the utility model.Any those of ordinary skill in the art, do not departing from technical solutions of the utility model scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible variations and modification to technical solutions of the utility model, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solutions of the utility model,, all still belongs in the scope of technical solutions of the utility model protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present utility model.
Claims (3)
1. a testing circuit for high-tension connector, is characterized in that, comprising: driving circuit and on-off element, d type flip flop;
Driving circuit, its input end is connected on a contact of low pressure auxiliary switch of the high-tension connector of accumulator, at low pressure auxiliary switch during in different conditions, its output terminal is exported different voltage, driving switch element, in different states, is judged the state of high-tension connector by the state variation of on-off element;
Described on-off element is field effect transistor, the control end of the output termination field effect transistor of driving circuit;
D type flip flop, the current output terminal of on-off element is connected to the preset end PR of d type flip flop, is embodied the state variation of on-off element by the state variation of the output terminal of d type flip flop;
Described driving circuit comprises the first resistance, the second resistance, the 3rd resistance and the first electric capacity, after the first resistance and the second resistance serial connection, one end of one end and the 3rd resistance is attempted by a contact of auxiliary switch, the control end of another termination on-off element, the other end ground connection of the 3rd resistance, the first electric capacity is connected between the control end and ground of on-off element.
2. testing circuit according to claim 1, is characterized in that, the reset terminal of described d type flip flop is defaulted as high level, is low level when reset operation.
3. testing circuit according to claim 1, is characterized in that, between the first resistance and the second resistance and be connected to clamping circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420295100.7U CN203965555U (en) | 2014-06-04 | 2014-06-04 | A kind of testing circuit of high-tension connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420295100.7U CN203965555U (en) | 2014-06-04 | 2014-06-04 | A kind of testing circuit of high-tension connector |
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| Publication Number | Publication Date |
|---|---|
| CN203965555U true CN203965555U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420295100.7U Expired - Fee Related CN203965555U (en) | 2014-06-04 | 2014-06-04 | A kind of testing circuit of high-tension connector |
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| CN (1) | CN203965555U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594055A (en) * | 2018-04-26 | 2018-09-28 | 成都雅骏汽车制造有限公司 | A kind of high-tension connector connection status detection circuit |
-
2014
- 2014-06-04 CN CN201420295100.7U patent/CN203965555U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594055A (en) * | 2018-04-26 | 2018-09-28 | 成都雅骏汽车制造有限公司 | A kind of high-tension connector connection status detection circuit |
| CN108594055B (en) * | 2018-04-26 | 2020-06-09 | 成都雅骏汽车制造有限公司 | High-voltage connector connection state detection circuit |
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20190604 |
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| CF01 | Termination of patent right due to non-payment of annual fee |