CN208607271U - Relay rear end voltage collection circuit and power supply - Google Patents
Relay rear end voltage collection circuit and power supply Download PDFInfo
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- CN208607271U CN208607271U CN201821292693.6U CN201821292693U CN208607271U CN 208607271 U CN208607271 U CN 208607271U CN 201821292693 U CN201821292693 U CN 201821292693U CN 208607271 U CN208607271 U CN 208607271U
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Abstract
The utility model provides a kind of relay rear end voltage collection circuit and power supply, is related to the technical field of battery management, including first resistor, second resistance and voltage collecting device；The connection of the input terminal of positive pole and high-voltage relay, the output end connection of high-voltage relay is connect with the anode of load, the cathode of load is connect with the input terminal of total negative relay, and the output end of total negative relay and the input terminal of current divider connect, and the output end of current divider is connect with power cathode；The input terminal of first resistor is connect with the anode of load, and the output end of the output end of first resistor, the input terminal of second resistance and current divider is all connected with, and the output end of second resistance and the input terminal of current divider connect；The input terminal of first resistor and the input terminal of voltage collecting device connect.Zenith tracking device acquires high-voltage relay rear end voltage, solves the problems, such as that high-voltage relay rear end voltage is difficult to acquire.
Description
Technical field
The utility model relates to technical field of battery management, more particularly, to a kind of relay rear end voltage collection circuit and
Power supply.
Background technique
Automobile industry is key pillars of the national economy industry, and important work is played in national economy and social development
With.Accelerate to cultivate and develop energy-saving automobile and new-energy automobile, is both that the energy and environmental pressure is effectively relieved, pushes automobile industry
The urgent task of sustainable development, be also to speed up automobile industry transition and upgrade, tap new sources of economic growth it is excellent with international competition
The strategic measure of gesture.With the continuous in-depth to electrified direction of current new-energy automobile technological development direction, hybrid power
Charge circuit and discharge loop are gradually rendered as separated trend in system battery packet design scheme.This design scheme has more
High safety, charge circuit is relatively independent, and during discharge, charge circuit is not connect with battery modules；In charging process
In, discharge loop is not connect with battery modules.If charge circuit breaks down, the normal work of discharge loop is nor affected on.
This hybrid power system battery pack design scheme includes total negative relay, total positive relay and pre- in battery pack
Fill relay.Preliminary filling relay and preliminary filling resistance are in parallel with total positive relay after connecting, referred to as high-voltage relay, high-voltage relay
Front end is connect with battery modules anode, and high-voltage relay rear end is connect with the anode of load, the cathode of load and total negative relay
Input terminal connection, the output end of total negative relay connect with battery modules cathode.Wherein, high-voltage relay rear end voltage is difficult to
Acquisition, the external equipment such as electric machine controller etc. that needs to rely on reports CAN, and (Controller Area Network controls general ability
Domain network) mode of message is acquired.
Aiming at the problem that voltage is difficult to acquire the above-mentioned rear end of high-voltage relay in the prior art, effectively solution is not yet proposed at present
Certainly scheme.
Utility model content
In view of this, leading to the purpose of this utility model is to provide a kind of relay rear end voltage collection circuit and power supply
Zenith tracking device acquires high-voltage relay rear end voltage and solves high-voltage relay rear end voltage without reporting CAN message
It is difficult to the problem of acquiring.
In a first aspect, the utility model embodiment provides a kind of relay rear end voltage collection circuit, comprising: the first electricity
Resistance, second resistance and voltage collecting device；The connection of the input terminal of positive pole and high-voltage relay, the output end of high-voltage relay
Connection connect with the anode of load, and the cathode of load is connect with the always input terminal of negative relay, always the output end of negative relay and
The input terminal of current divider connects, and the output end of current divider is connect with power cathode；The input terminal of first resistor and the anode of load
Connection, the output end of the output end of first resistor, the input terminal of second resistance and current divider are all connected with, the output end of second resistance
It is connect with the input terminal of current divider；The input terminal of first resistor and the input terminal of voltage collecting device connect.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, further includes: 3rd resistor；The anode of the input terminal of 3rd resistor, the output end of high-voltage relay and load is all connected with, third
The output end of resistance and the input terminal of first resistor connect.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Two kinds of possible embodiments, wherein further include: first switch；First switch is set to the output end and first of 3rd resistor
Between the input terminal of resistance.
The possible embodiment of second with reference to first aspect, the utility model embodiment provide the of first aspect
Three kinds of possible embodiments, wherein first switch is optocoupler.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, further includes: second switch；The output end of one end of second switch, power cathode and current divider is all connected with, second switch it is another
The connection of the input terminal of one end and second resistance.
The 4th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Five kinds of possible embodiments, wherein second switch is optocoupler.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In, further includes: diode；The anode of diode is connect with the output end of second resistance, the cathode of diode and total negative relay
Input terminal connection.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, load includes: capacitor and power drive system in parallel.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, high-voltage relay includes: total positive relay, preliminary filling relay and preliminary filling resistance；The input terminal and preliminary filling of total positive relay after
The input terminal of electric appliance connects, and the output end of preliminary filling relay connect with one end of preliminary filling resistance, the other end of preliminary filling resistance with always
The output end connection of positive relay.
Second aspect, the utility model embodiment also provide a kind of power supply, comprising: such as first aspect and its each possible reality
Apply the relay rear end voltage collection circuit of one of mode offer, battery modules, total positive relay, total negative relay, preliminary filling after
Electric appliance and preliminary filling resistance.
The utility model embodiment bring it is following the utility model has the advantages that
Relay rear end provided by the embodiment of the utility model voltage collection circuit and power supply, comprising: first resistor, second
Resistance and voltage collecting device, voltage collecting device pass through the voltage of acquisition first resistor input terminal, after detecting high-voltage relay
Voltage is held to solve the problems, such as that high-voltage relay rear end voltage is difficult to acquire without reporting CAN message.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not making the creative labor for those skilled in the art
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of circuit structure diagram of battery pack circuit provided by the embodiment of the utility model；
Fig. 2 is a kind of circuit structure diagram of relay rear end voltage collection circuit provided by the embodiment of the utility model；
Fig. 3 is the circuit structure diagram of another relay rear end provided by the embodiment of the utility model voltage collection circuit；
Fig. 4 is a kind of structural schematic diagram of power supply provided by the embodiment of the utility model.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not making creation
Property labour under the premise of every other embodiment obtained, fall within the protection scope of the utility model.
Automobile industry is key pillars of the national economy industry, and important work is played in national economy and social development
With.Accelerate to cultivate and develop energy-saving automobile and new-energy automobile, is both that the energy and environmental pressure is effectively relieved, pushes automobile industry
The urgent task of sustainable development, be also to speed up automobile industry transition and upgrade, tap new sources of economic growth it is excellent with international competition
The strategic measure of gesture.With the continuous in-depth to electrified direction of current new-energy automobile technological development direction, hybrid power
Charge circuit and discharge loop are gradually rendered as separated trend in system battery packet design scheme.This design scheme has more
High safety, charge circuit is relatively independent, and during discharge, charge circuit is not connect with battery modules；In charging process
In, discharge loop is not connect with battery modules.If charge circuit breaks down, the normal work of discharge loop is nor affected on.
This hybrid power system battery pack design scheme, a kind of circuit structure of battery pack circuit shown in Figure 1
Figure.As shown in Figure 1, the battery pack circuit includes: high-voltage relay and total negative relay, high-voltage relay includes total positive relay
Device, preliminary filling relay and preliminary filling resistance.
The input terminal of the input terminal and preliminary filling relay of positive, total positive relay of battery modules is all connected with, preliminary filling relay
Device is connect with one end of preliminary filling resistance, and the other end of preliminary filling resistance, total positive output end of relay and the input terminal of load connect
It connects, the cathode of battery modules is connect with the input terminal of total negative relay, and the output end of total negative relay and the output end of load connect
It connects, service switch is arranged in battery modules.However, high-voltage relay rear end voltage is difficult to acquire, the outside that needs to rely on is set
Standby such as electric machine controller reports the mode of CAN message to be acquired.
Based on this, a kind of relay rear end voltage collection circuit and power supply provided by the embodiment of the utility model, comprising: the
One resistance, second resistance and voltage collecting device, voltage of the voltage collecting device by acquisition first resistor input terminal, detection height
Potential relay rear end voltage solves the problems, such as that high-voltage relay rear end voltage is difficult to acquire without reporting CAN message.
For convenient for understanding the present embodiment, first to a kind of relay rear end disclosed in the utility model embodiment
Voltage collection circuit describes in detail.
Embodiment one:
The utility model embodiment provides a kind of high-voltage relay rear end voltage collection circuit, comprising: first resistor,
Two resistance and voltage collecting device；The connection of the input terminal of positive pole and high-voltage relay, the output end connection of high-voltage relay
It is connect with the anode of load, the cathode of load is connect with the input terminal of total negative relay, the output end of total negative relay and shunting
The input terminal of device connects, and the output end of current divider is connect with power cathode；The input terminal of first resistor is connect with the anode of load,
The output end of the output end of first resistor, the input terminal of second resistance and current divider is all connected with, the output end of second resistance with point
Flow the input terminal connection of device；The input terminal of first resistor and the input terminal of voltage collecting device connect.
A kind of circuit structure diagram of relay rear end voltage collection circuit shown in Figure 2, as shown in Figure 2, comprising: electricity
Hinder R1, resistance R2 and voltage collecting device；The connection of the input terminal of positive pole and high-voltage relay, the output end of high-voltage relay
Connection connect with the anode of load, and the cathode of load is connect with the always input terminal of negative relay, always the output end of negative relay and
The input terminal of current divider connects, and the output end of current divider is connect with power cathode.
The input terminal of resistance R1 is connect with the anode of load, the input terminal and current divider of the output end of resistance R1, resistance R2
Output end be all connected with, the input terminal of the output end of resistance R2 and current divider connects；The input terminal and voltage acquisition of resistance R1 fills
The input terminal connection set.
High-voltage relay includes: total positive relay, preliminary filling relay and preliminary filling resistance；
The input terminal of total positive relay is connect with the input terminal of preliminary filling relay, the output end of preliminary filling relay and precharge
One end of resistance connects, and the other end of preliminary filling resistance is connect with the output end of total positive relay.
When high-voltage relay and total negative relay are at closed state, signal is flowed out from positive pole, by high pressure
Relay, load, total negative relay, current divider, flow into power cathode, and load works normally.The electricity of high-voltage acquisition device acquisition
Pressing is high-voltage relay rear end voltage, if the voltage of high-voltage acquisition device acquisition has exception, illustrates to occur in circuit event
Barrier.
It include that capacitor and electricity in parallel drive due to loading when high-voltage relay and total negative relay are at off-state
Dynamic system, capacitor charging when high-voltage relay and total negative relay are at closed state are then negative in high-voltage relay and always
It when relay is at off-state, outwardly discharges, signal flows into negative from load anode outflow by resistance R1, resistance R2
Load with pole.Form discharge loop.The voltage of high-voltage relay rear end is acquired by high-voltage acquisition device, and then is in judgement load
The no charge for having remaining, if so, the voltage of high-voltage acquisition device acquisition is not 0；If not provided, the acquisition of high-voltage acquisition device
Voltage is 0.
Foregoing circuit provided by the embodiment of the utility model, comprising: first resistor, second resistance and voltage collecting device,
Voltage collecting device detects high-voltage relay rear end voltage, without reporting CAN to report by the voltage of acquisition first resistor input terminal
Text solves the problems, such as that high-voltage relay rear end voltage is difficult to acquire.
However, the voltage of power supply output may be high pressure, and there are threshold values for the numerical value of voltage collecting device collection voltages, such as
Fruit electric power output voltage is excessively high, and the numerical value of voltage collecting device collection voltages is more than threshold value, will lead to voltage collecting device damage,
Therefore, the numerical value of collection voltages can be reduced in such a way that series resistance divides.Foregoing circuit further include: 3rd resistor；The
The anode of the input terminal of three resistance, the output end of high-voltage relay and load is all connected with, the output end of 3rd resistor and the first electricity
The input terminal of resistance connects.
3rd resistor is connected with first resistor, and the voltage of voltage collecting device acquisition is the voltage of first resistor, passes through electricity
The voltage U1 for hindering R1, can be detected high-voltage relay rear end voltage, and then judge the charge for whether having remaining in load, if
Have, the voltage of high-voltage acquisition device acquisition is not 0；If not provided, the voltage of high-voltage acquisition device acquisition is 0.
Foregoing circuit provided by the embodiment of the utility model is connected by 3rd resistor with first resistor, the first electricity of acquisition
The voltage value of resistance calculates high-voltage relay rear end voltage, can prevent from leading to voltage acquisition because of the overtension that battery source exports
Device damage.
There are quiescent dissipations during loaded work piece for first resistor, can be switched by increasing, guarantee signal negative
Do not pass through first resistor when carrying work.Foregoing circuit further include: first switch；First switch is set to the output end of 3rd resistor
Between the input terminal of first resistor.
Optocoupler can be used in first switch, and optocoupler is made of light emitting diode and photosensitive semiconductor pipe, is there is electric current process
After light emitting diode, lumination of light emitting diode causes photosensitive semiconductor pipe to be connected, that is, closes the switch；In no electric current by shining
After diode, light emitting diode, which does not shine, causes photosensitive semiconductor pipe to be not turned on, i.e., switch disconnects.It is controlled and is sent out using external circuit
Whether optical diode has electric current to pass through, i.e., whether controllable photosensitive semiconductor pipe is connected.
Foregoing circuit provided by the embodiment of the utility model guarantees that signal is obstructed in loaded work piece by first switch
First resistor is crossed, quiescent dissipation is eliminated.
Equally, there is also quiescent dissipations for second resistance, therefore are also required to increase switch, guarantee signal in loaded work piece not
Pass through second resistance.Foregoing circuit further include: second switch；One end of second switch, power cathode and current divider output end
It is all connected with, the other end of second switch and the input terminal of second resistance connect.
Optocoupler also can be used in second switch, passes through second resistance for controlling electric current.
Foregoing circuit provided by the embodiment of the utility model guarantees that signal is obstructed in loaded work piece by second switch
Second resistance is crossed, quiescent dissipation is eliminated.
In order to guarantee that signal in the direction that second resistance circulates, can pass through diode, it is ensured that the one-way conduction of signal, on
State circuit further include: diode；The anode of diode is connect with the output end of second resistance, the cathode of diode and total negative relay
The input terminal of device connects.
Foregoing circuit provided by the embodiment of the utility model ensure that signal in the unidirectional of second resistance by diode
Conducting.
A kind of relay rear end voltage collection circuit provided by the embodiment of the utility model, comprising: first resistor, the second electricity
Resistance, 3rd resistor, first switch, second switch, diode and voltage collecting device, 3rd resistor are connected point with first resistor
Pressure, voltage collecting device detect high-voltage relay rear end voltage, without reporting by the voltage of acquisition first resistor input terminal
CAN message solves the problems, such as that high-voltage relay rear end voltage is difficult to acquire.By first switch, guarantee signal in load work
Do not pass through first resistor when making, eliminate quiescent dissipation, by second switch, guarantees that signal does not pass through the second electricity in loaded work piece
Resistance eliminates quiescent dissipation and ensure that signal in the one-way conduction of second resistance by diode.
Embodiment two:
The utility model embodiment 2 provides a kind of relay rear end voltage collection circuit, it is shown in Figure 3 it is another after
The circuit structure diagram of electric appliance rear end voltage collection circuit, as shown in Figure 3, comprising: resistance R1, resistance R2, resistance R3, voltage acquisition
Device, optocoupler U1, optocoupler U2 and diode D1；The anode of battery modules is connect with the input terminal of high-voltage relay, high-voltage relay
Output end, one end of resistance R3 and the anode of load of device are all connected with, the cathode of load, the cathode of diode D1 and total negative relay
The input terminal of device is all connected with, and the output end of total negative relay and the input terminal of current divider connect, the output end and battery of current divider
The cathode of module connects.
The other end of resistance R3 is connect with the collector of optocoupler U1, the input of the emitter, voltage collecting device of optocoupler U1
End and one end of resistance R1 are all connected with, and the other end of resistance R1 and the output end of current divider connect.
The output end of current divider is connect with the collector of optocoupler U2, is connected with the emitter of optocoupler U2 and one end of resistance R2
It connects, the other end of resistance R2 is connect with the anode of diode D1.
High-voltage relay includes: total positive relay, preliminary filling relay and preliminary filling resistance；The input terminal of total positive relay and pre-
The input terminal connection of relay is filled, the output end of preliminary filling relay is connect with one end of preliminary filling resistance, the other end of preliminary filling resistance
It is connect with the output end of total positive relay.Load includes: capacitor C1 and power drive system in parallel.
At battery modules during the work time, optocoupler U1 and optocoupler U2 is disconnected, high-voltage relay and total negative relay closure.
Signal is exported from battery modules anode, successively by high-voltage relay, load, total negative relay and current divider, inputs battery mould
Group cathode, while loading interior capacitor C1 charging.
When battery modules are in the non-course of work, high-voltage relay and total negative relay are disconnected, optocoupler U1 and optocoupler U2
Closure.At this moment interior capacitor C1 electric discharge is loaded, signal successively passes through resistance R3, switch U1, resistance R1, opens from load anode outflow
Load cathode is flowed into after closing U2, resistance R2, diode D1.Resistance R1, resistance R2 and resistance R3 series connection, voltage collecting device are adopted
Collect the voltage of the input terminal of resistance R1.By the voltage of the input terminal of detection resistance R1, high-voltage relay rear end electricity can be detected
Pressure, and then judge the charge for whether having remaining in load, if so, the voltage of high-voltage acquisition device acquisition is not 0；If not yet
Have, the voltage of high-voltage acquisition device acquisition is 0.
A kind of relay rear end voltage collection circuit provided by the embodiment of the utility model, comprising: resistance R1, resistance R2,
Resistance R3, voltage collecting device, optocoupler U1, optocoupler U2 and diode D1；The input of the anode and high-voltage relay of battery modules
End connection, output end, one end of resistance R3 and the anode of load of high-voltage relay are all connected with, cathode, the diode D1 of load
Cathode and the input terminal of total negative relay be all connected with, the output end of total negative relay and the input terminal of current divider connect, and shunt
The output end of device and the cathode of battery module connect.Voltage collecting device acquires the voltage of the input terminal of resistance R1.Pass through detection
The voltage of the input terminal of resistance R1 can be detected high-voltage relay rear end voltage, and then judge the electricity for whether having remaining in load
Lotus, if so, the voltage of high-voltage acquisition device acquisition is not 0；If not provided, the voltage of high-voltage acquisition device acquisition is 0.
Embodiment three:
The utility model embodiment 3 provides a kind of power supply, a kind of structural schematic diagram of power supply shown in Figure 4, such as Fig. 4
It is shown, comprising: relay rear end voltage collection circuit, the battery provided such as one of first aspect and its each possible embodiment
Mould group, total positive relay, total negative relay, preliminary filling relay and preliminary filling resistance.
It is apparent to those skilled in the art that for convenience and simplicity of description, the power supply of foregoing description
Specific work process, can be with reference to the corresponding process in previous embodiment, details are not described herein.
Power supply provided by the embodiment of the utility model has with relay rear end provided by the above embodiment voltage collection circuit
There is identical technical characteristic, so also can solve identical technical problem, reaches identical technical effect.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Finally, it should be noted that above embodiments, only specific embodiment of the present utility model, to illustrate that this is practical
Novel technical solution, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned implementation
The utility model is described in detail in example, it should be understood by those skilled in the art that: any skill for being familiar with the art
Art personnel within the technical scope disclosed by the utility model, can still carry out technical solution documented by previous embodiment
Modification can readily occur in variation or equivalent replacement of some of the technical features；And these are modified, change or replace
It changes, the spirit and scope for the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution should all cover
It is within the protection scope of the utility model.Therefore, the protection scope of the utility model should be with scope of protection of the claims
It is quasi-.
Claims (10)
1. a kind of relay rear end voltage collection circuit characterized by comprising first resistor, second resistance and voltage acquisition
Device；
The connection of the input terminal of positive pole and high-voltage relay, the anode of output end connection with the load of the high-voltage relay is even
Connect, the cathode of the load connect with the input terminal of total negative relay, the always output end of negative relay and current divider it is defeated
Enter end connection, the output end of the current divider is connect with power cathode；
The input terminal of the first resistor is connect with the anode of load, the output end of the first resistor, the second resistance
The output end of input terminal and the current divider is all connected with, and the output end of the second resistance and the input terminal of the current divider connect
It connects；
The input terminal of the first resistor is connect with the input terminal of the voltage collecting device.
2. circuit according to claim 1, which is characterized in that further include: 3rd resistor；
The anode of the input terminal of the 3rd resistor, the output end of the high-voltage relay and the load is all connected with, and described
The output end of three resistance is connect with the input terminal of the first resistor.
3. circuit according to claim 2, which is characterized in that further include: first switch；
The first switch is set between the output end of the 3rd resistor and the input terminal of the first resistor.
4. circuit according to claim 3, which is characterized in that the first switch is optocoupler.
5. circuit according to claim 1, which is characterized in that further include: second switch；
The output end of one end of the second switch, the power cathode and the current divider is all connected with, the second switch
The other end is connect with the input terminal of the second resistance.
6. circuit according to claim 5, which is characterized in that the second switch is optocoupler.
7. circuit according to claim 1, which is characterized in that further include: diode；
The anode of the diode is connect with the output end of the second resistance, the cathode of the diode and total negative relay
The input terminal of device connects.
8. circuit according to claim 1, which is characterized in that the load includes: capacitor and power drive system in parallel.
9. circuit according to claim 1, which is characterized in that the high-voltage relay include: total positive relay, preliminary filling after
Electric appliance and preliminary filling resistance；
The input terminal of total positive relay is connect with the input terminal of the preliminary filling relay, the output end of the preliminary filling relay
It is connect with one end of the preliminary filling resistance, the other end of the preliminary filling resistance is connect with the output end of total positive relay.
10. a kind of power supply, which is characterized in that including the described in any item relay rear end voltage collection circuits of claim 1-9,
Battery modules, total positive relay, total negative relay, preliminary filling relay and preliminary filling resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821292693.6U CN208607271U (en) | 2018-08-10 | 2018-08-10 | Relay rear end voltage collection circuit and power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821292693.6U CN208607271U (en) | 2018-08-10 | 2018-08-10 | Relay rear end voltage collection circuit and power supply |
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| CN208607271U true CN208607271U (en) | 2019-03-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337822A (en) * | 2020-03-20 | 2020-06-26 | 威睿电动汽车技术(宁波)有限公司 | Relay adhesion detection circuit and main and negative relay adhesion detection method |
-
2018
- 2018-08-10 CN CN201821292693.6U patent/CN208607271U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337822A (en) * | 2020-03-20 | 2020-06-26 | 威睿电动汽车技术(宁波)有限公司 | Relay adhesion detection circuit and main and negative relay adhesion detection method |
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