CN209707656U - A kind of battery system relay adhesion detection circuit - Google Patents
A kind of battery system relay adhesion detection circuit Download PDFInfo
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- CN209707656U CN209707656U CN201920076783.XU CN201920076783U CN209707656U CN 209707656 U CN209707656 U CN 209707656U CN 201920076783 U CN201920076783 U CN 201920076783U CN 209707656 U CN209707656 U CN 209707656U
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- divider resistance
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Abstract
The utility model discloses a kind of battery system relay adhesion detection circuit, including power supply, the positive B+ of power supply connects with divider resistance R1 and main positive relay K1 respectively；Main positive relay K1 connects with the anode of divider resistance R3 and load end equivalent circuit respectively；Divider resistance R1 connects one end of divider resistance R2 and the cathode of load end equivalent circuit respectively；Divider resistance R2 meets the cathode B- and main negative relay K2 of power supply respectively；Main negative relay K2 connects with the connecting path between divider resistance R1 and the cathode of load end equivalent circuit；Divider resistance R3 connects with divider resistance R4；Divider resistance R4 meets the cathode B- and main negative relay K2 of power supply respectively.The utility model can accurately and reliably in the high tension loop of electric vehicle battery system relay carry out adhesion detection, judge relay whether adhesion.
Description
Technical field
The utility model relates to new energy electronic technology fields, detect more particularly to a kind of battery system relay adhesion
Circuit.
Background technique
Currently, China's new-energy automobile industry is grown rapidly, battery system is the power resources of new-energy automobile, is run over
Zero-emission is its great advantage in journey, therefore has obtained vigorously supporting for country.
However, since the technological accumulation time is relatively short, the problem of many electric car secure contexts, is received increasingly
More concerns.Electric vehicle battery system generally comprises multiple high tension loops, including discharge loop, charge circuit, heating circuit
Deng, these relay in high voltage loop whether can reliably working, be directly related to electric car itself and autoist
Safety.As shown in FIG. 1, FIG. 1 is the typical high tension loop of electric car, which includes power supply (positive pole B+, power supply
Cathode B-), main positive relay K1, main negative relay K2, and the load equivalent circuit composed in parallel by capacitor C0 and resistance R0,
Wherein load equivalent circuit in practical applications, can indicate motor, can also indicate the charging pile used during the charging process
Interior voltage detecting circuit.HV+ and HV- respectively indicates the anode and cathode of load equivalent circuit
Wherein, when high current closure occurs in the relay in the high tension loop of electric vehicle battery system or cuts off feelings with carrying
When condition, relay is likely to result in safety accident it is possible that adhesion fault (i.e. the contact adhesion of relay).Therefore, it needs
Will to relay whether adhesion, regularly detected, relay adhesion detection has become battery management system (Battery
Management System, BMS) an indispensable function.
But there is presently no a kind of technologies, it can be accurately and reliably to the high tension loop of electric vehicle battery system
In relay carry out adhesion detection, judge relay whether adhesion, to ensure the safe handling of electric vehicle battery system.
Utility model content
It, can be in view of this, the purpose of the utility model is to provide a kind of battery system relay adhesion detection circuit
Adhesion detection accurately and reliably is carried out to the relay in the high tension loop of electric vehicle battery system, judges whether relay glues
Even, to ensure the safe handling of electric vehicle battery system, be conducive to widely apply, anticipate with great production practices
Justice.
For this purpose, the utility model provides a kind of battery system relay adhesion detection circuit, including power supply B, the electricity
The positive B+ of source B connects with one end of one end of divider resistance R1 and main positive relay K1 respectively；
The other end of the positive relay K1 of master respectively with one end of divider resistance R3 and an equivalent electricity of load end
The positive HV+ on road connects；
The other end of the divider resistance R1 connects one end of divider resistance R2 and the cathode of load end equivalent circuit respectively
HV-；
The other end of the divider resistance R2 connects one end of the cathode B- and main negative relay K2 of the power supply B respectively；
Between the other end and the divider resistance R1 and the cathode HV- of load equivalent circuit of the negative relay K2 of master
Connecting path connects；
The other end of the divider resistance R3 connects with one end of a divider resistance R4；
The other end of the divider resistance R4 connects one end of the cathode B- and main negative relay K2 of the power supply B respectively.
Wherein, it is made of the divider resistance R1 and divider resistance R2 for carrying out adhesion detection to the negative relay K2 of master
First detection branch；It is made of the divider resistance R3 and divider resistance R4 for carrying out adhesion detection to the positive relay K1 of master
Second detection branch.
Wherein, the power supply is the battery pack formed of being connected by multiple batteries.
Wherein, the load end equivalent circuit is the load end equivalent circuit composed in parallel by capacitor C0 and resistance R0.
Wherein, the resistance value of the divider resistance R2 is less than the resistance value of divider resistance R1, and the resistance value of the divider resistance R4 is small
In the resistance value of divider resistance R3.
By the above technical solution provided by the utility model as it can be seen that the utility model provides a kind of battery system relay
Adhesion detection circuit accurately and reliably can carry out adhesion inspection to the relay in the high tension loop of electric vehicle battery system
It surveys, judges whether adhesion is conducive to widely apply relay to ensure the safe handling of electric vehicle battery system, have
There is great production practices meaning.
In addition, voltage of the utility model detected by load end is low (being, for example, less than 5V), it is not only highly-safe, but also
Effectively overcoming existing detection means influences the defect and erroneous judgement power-off of personal safety on the detection overtension of load end
The defect that cell system breaks down more has practicability.
Detailed description of the invention
Fig. 1 is a kind of existing circuit diagram of electric automobile high-voltage major loop；
Fig. 2 is a kind of circuit diagram of battery system relay adhesion detection circuit provided by the utility model.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and embodiment
The utility model is described in further detail.
Fig. 2 is a kind of circuit diagram of battery system relay adhesion detection circuit provided by the utility model.
Referring to fig. 2, the utility model provides a kind of battery system relay adhesion detection circuit, including power supply B, described
The positive B+ of power supply B connects with one end of one end of divider resistance R1 and main positive relay K1 respectively；
The other end of the positive relay K1 of master respectively with one end of divider resistance R3 and an equivalent electricity of load end
The positive HV+ on road connects；
The other end of the divider resistance R1 connects one end of divider resistance R2 and the cathode of load end equivalent circuit respectively
HV-；
The other end of the divider resistance R2 connects one end of the cathode B- and main negative relay K2 of the power supply B respectively；
Between the other end and the divider resistance R1 and the cathode HV- of load end equivalent circuit of the negative relay K2 of master
Connecting path connect；
The other end of the divider resistance R3 connects with one end of a divider resistance R4；
The other end of the divider resistance R4 connects one end of the cathode B- and main negative relay K2 of the power supply B respectively；
In the present invention, it in specific implementation, is made of the divider resistance R1 and divider resistance R2 for main negative
First detection branch of relay K2 progress adhesion detection；By the divider resistance R3 and divider resistance R4 form for it is main just
Second detection branch of relay K1 progress adhesion detection.
In the present invention, in specific implementation, the power supply can be the battery pack formed of being connected by multiple batteries.
In the present invention, in specific implementation, the load equivalent circuit is composed in parallel by capacitor C0 and resistance R0
Load equivalent circuit.
In the present invention, in specific implementation, the resistance value of the divider resistance R2 is less than the resistance value of divider resistance R1, institute
The resistance value for stating divider resistance R4 is less than the resistance value of divider resistance R3.
It should be noted that the utility model is by the voltage at the both ends detection resistance R2 and R4, to judge that relay is
The reference voltage detection of no adhesion, general common voltage detecting circuit or voltage detection module it is smaller (representative value be 0V~
5V), therefore to the negative relay K2 of master the proportionate relationship of resistance R1 and R2 in the first detection branch of adhesion detection are carried out, it is ensured that
The voltage at the both ends resistance R2 within the voltage rating detection range of voltage detecting circuit or voltage detection module, and to it is main just after
Electric appliance K1 carries out the proportionate relationship of resistance R3 and R4 in the second detection branch of adhesion detection, also to guarantee the electricity at the both ends resistance R4
It is pressed within the voltage rating detection range of voltage detecting circuit or voltage detection module.
It should be noted that for battery system relay adhesion detection circuit provided by the utility model, to main negative
The working principle of relay K2 progress adhesion detection are as follows: in the case where the positive relay K1 of master and main negative relay K2 are disconnected, lead to
The proportionate relationship for crossing divider resistance R1 and R2 in rationally the first detection branch of setting (guarantees that the voltage at the both ends resistance R2 is examined in voltage
Within the voltage rating detection range of slowdown monitoring circuit or voltage detection module), the both ends resistance R2 can detecte to a low-voltage (one
As preset threshold be arranged between 0V~5V, specific value is according to the voltage detecting circuit or voltage detection module at the both ends resistance R2
Voltage rating detection range determine), i.e., when the voltage at the both ends resistance R2 is higher than preset threshold, then judge to lead negative relay K2
There is not adhesion；If resistance R2 both end voltage is lower than preset threshold, illustrate that electric current passes sequentially through the by positive pole B+
Power cathode B- is returned to after the divider resistance R1 of one detection branch, main negative relay K2, the voltage at the both ends divider resistance R2 is 0V
Or a value close to 0V, to judge that leading negative relay K2 adhesion fault occurs.
For battery system relay adhesion detection circuit provided by the utility model, relay K1 positive to master glues
The even working principle of detection are as follows: in the case where the positive relay K1 of master and main negative relay K2 are disconnected, electric current is by positive pole B+
Pass sequentially through load end equivalent circuit, the second detection branch of divider resistance R1, R0 and capacitor C0 composition in the first detection branch
Divider resistance R3 in road, after the divider resistance R4 of the second detection branch, power cathode B- is returned to, after partial pressure, the second inspection
The voltage for surveying the both ends divider resistance R4 of branch is 0V or adhesion does not occur close to 0V, the i.e. main positive relay K1 of judgement；If
Main positive relay K1 adhesion, electric current are passed sequentially through the divider resistance R3 of the second detection branch, the second detection branch by positive pole B+
Power cathode B- is returned to after the divider resistance R4 on road, by the ratio that divider resistance R3 and R4 in the second detection branch is rationally arranged
Relationship (guarantees the voltage at the both ends resistance R4 within the voltage rating detection range of voltage detecting circuit or voltage detection module),
The both ends resistance R4 can detecte that (general preset threshold is arranged between 0V~5V, and specific value is according to resistance to low-voltage
The voltage rating detection range of the voltage detecting circuit at the both ends R4 or voltage detection module is determined), i.e., when resistance R4 both end voltage
When higher than preset threshold, then judge that leading positive relay K1 adhesion fault occurs.
It should be noted that sentencing for relay adhesion detection circuit provided by the utility model, whether the relay that breaks
The operating procedure of adhesion can be summarized as follows:
1, the both ends of divider resistance R2, which can detecte to one, when main negative relay K2 is disconnected, in the first detection branch is higher than
(general preset threshold is arranged between 0V~5V the voltage of preset threshold, and specific value can be examined according to resistance R2 both end voltage
The voltage rating detection range of slowdown monitoring circuit or voltage detection module is determined)；When there is adhesion fault in main negative relay K2, partial pressure electricity
The voltage that detects of the resistance both ends R2 is 0V or close to 0V.
2, when main positive relay K1 is disconnected, the voltage at the both ends divider resistance R4 is 0V or close to 0V in the second detection branch；
When adhesion fault occurs in main positive relay K1, it is (general pre- that the both ends resistance R4 can detecte the voltage for being higher than preset threshold to one
If threshold value is arranged between 0V~5V, specific value is according to the voltage detecting circuit at the both ends resistance R4 or the volume of voltage detection module
Constant voltage detection range is determined).
It should be noted that the battery system of electric car generally before vehicle powers on or charges, carries out relay
Adhesion detection, in the case where there is not adhesion in the positive relay K1 of master and main negative relay K2, electric current by positive pole B+ successively
Point of the load end equivalent circuit, the second detection branch that are made up of divider resistance R1, R0 and capacitor C0 of the first detection branch
Piezoresistance R3, the second detection branch divider resistance R4 after return to power cathode B-, through partial pressure back loading equivalent circuit both ends
Voltage between HV+, HV- is lower than predetermined voltage threshold (the general preset threshold at the both ends divider resistance R2 in the first detection branch
It is arranged between 0V~5V, specific value is examined according to the voltage rating of resistance R2 both end voltage detection circuit or voltage detection module
Range is surveyed to determine).
Compared with existing detection means, electricity is detected for battery system relay adhesion provided by the utility model
Road overcomes existing detection means the shortcomings that load end detects high pressure, will not threaten to personal safety, will not be by
Detect that high pressure reports charge fault and influences charging process before charging in charging pile.
It should be noted that carrying out the method for relay adhesion detection in load end for existing detection means
Can detecte very high voltage, there are personnel get an electric shock risk, and during the charging process charging pile detect charge port have compared with
High voltage judges to be stopped charging for failure, to have more limitation, compared with prior art, this reality on measuring points placement
With the relay adhesion detection circuit of novel offer after the resistance value of reasonable disposition divider resistance, the voltage that load end detects can
To be less than 5V, the shortcomings that conventionally employed bleeder circuit carries out relay adhesion detection circuit is overcome, in the arrangement of test point
It is more flexible, detection circuit cost can be effectively reduced, improve the flexibility and economy of detection circuit in practical applications.
For relay adhesion detection circuit provided by the utility model, adhesion is carried out to the relay in battery system
When detection, accurate, reliable, the fireballing advantage of adhesion detection mode, and meanwhile it is low in the voltage that load end detects, it overcomes existing
There is detection means the shortcomings that load end detects high pressure, safety is good.
By the above technical solution provided by the utility model as it can be seen that the utility model provides a kind of battery system relay
Adhesion detection circuit accurately and reliably can carry out adhesion inspection to the relay in the high tension loop of electric vehicle battery system
It surveys, judges whether adhesion is conducive to widely apply relay to ensure the safe handling of electric vehicle battery system, have
There is great production practices meaning.
In addition, voltage of the utility model detected by load end is low (being, for example, less than 5V), it is not only highly-safe, but also
Effectively overcoming existing detection means influences the defect and erroneous judgement power-off of personal safety on the detection overtension of load end
The defect that cell system breaks down more has practicability.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (5)
1. a kind of battery system relay adhesion detection circuit, which is characterized in that including power supply B, positive B+ points of the power supply B
Do not connect with one end of one end of divider resistance R1 and main positive relay K1；
The other end of the positive relay K1 of master respectively with one end of divider resistance R3 and load end equivalent circuit
Positive HV+ connects；
The other end of the divider resistance R1 connects one end of divider resistance R2 and the cathode HV- of load end equivalent circuit respectively；
The other end of the divider resistance R2 connects one end of the cathode B- and main negative relay K2 of the power supply B respectively；
Company between the other end and the divider resistance R1 and the cathode HV- of load end equivalent circuit of the negative relay K2 of master
Road is connected to connect；
The other end of the divider resistance R3 connects with one end of a divider resistance R4；
The other end of the divider resistance R4 connects one end of the cathode B- and main negative relay K2 of the power supply B respectively.
2. circuit as described in claim 1, which is characterized in that by the divider resistance R1 and divider resistance R2 form for pair
Main negative relay K2 carries out the first detection branch of adhesion detection；By the divider resistance R3 and divider resistance R4 form for pair
Main positive relay K1 carries out the second detection branch of adhesion detection.
3. circuit as described in claim 1, which is characterized in that the power supply is the battery pack formed of being connected by multiple batteries.
4. circuit as described in claim 1, which is characterized in that the load end equivalent circuit be by capacitor C0 and resistance R0 simultaneously
Join the load end equivalent circuit of composition.
5. circuit as described in claim 1, which is characterized in that the resistance value of the divider resistance R2 is less than the resistance of divider resistance R1
Value, the resistance value of the divider resistance R4 are less than the resistance value of divider resistance R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920076783.XU CN209707656U (en) | 2019-01-17 | 2019-01-17 | A kind of battery system relay adhesion detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920076783.XU CN209707656U (en) | 2019-01-17 | 2019-01-17 | A kind of battery system relay adhesion detection circuit |
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| CN209707656U true CN209707656U (en) | 2019-11-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669120A (en) * | 2019-01-17 | 2019-04-23 | 力神动力电池***有限公司 | A kind of battery system relay adhesion detection circuit |
| CN112557893A (en) * | 2020-12-02 | 2021-03-26 | 深圳英飞源技术有限公司 | Relay adhesion detection circuit and method and battery management system |
-
2019
- 2019-01-17 CN CN201920076783.XU patent/CN209707656U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669120A (en) * | 2019-01-17 | 2019-04-23 | 力神动力电池***有限公司 | A kind of battery system relay adhesion detection circuit |
| CN112557893A (en) * | 2020-12-02 | 2021-03-26 | 深圳英飞源技术有限公司 | Relay adhesion detection circuit and method and battery management system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220129 Address after: 266500 Minshan Road, Huangdao District, Qingdao, Shandong Patentee after: LISHEN (QINGDAO) NEW ENERGY CO.,LTD. Address before: 300384 Tianjin Xiqing District Binhai new and high technology Industrial Development Zone Huayuan Technology Park (outside the ring) Hai Tai Nan Road No. 38. Patentee before: LISHEN POWER BATTERY SYSTEMS Co.,Ltd. |