CN110456141A - A kind of flash over-current detection circuit and its method - Google Patents
A kind of flash over-current detection circuit and its method Download PDFInfo
- Publication number
- CN110456141A CN110456141A CN201910803162.1A CN201910803162A CN110456141A CN 110456141 A CN110456141 A CN 110456141A CN 201910803162 A CN201910803162 A CN 201910803162A CN 110456141 A CN110456141 A CN 110456141A
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistance
- voltage comparator
- comparator
- high level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
Abstract
The invention discloses a kind of flash over-current detection circuit and its methods, detection circuit includes power supply unit, electric current hysteresis comparator unit and level conversion unit, and detection method includes that electric current hysteresis comparator is accessed to the both ends sampling resistor R1 between load and supply voltage；Electric current hysteresis comparator unit compares reversion output high-low voltage after load current and setting value；Level conversion unit converts the high-low voltage of output, exports logic level；The electric current between load and supply voltage is calculated by the logic level of output.The present invention uses electric current hysteresis comparator unit, level conversion unit and chip microcontroller over-current detection, wherein electric current hysteresis comparator unit, built using comparator, triode, resistance etc. in level conversion unit, circuit is simple, at low cost, response is fast, thus the shortcomings that overcoming the higher cost of existing high-side current sample circuit.
Description
Technical field
The present invention relates to over-current detection technical fields, and in particular to a kind of flash over-current detection circuit and its method.
Background technique
Over-current detection is to need to detect the size of electric current first, then the output overcurrent status signal compared with reference value.Electricity
The detection of stream is there are mainly two types of basic scheme, and the magnetic field around conductor flowed through one is measurement electric current, another kind is in electricity
It is inserted into one small resistance (current divider) in flow path, then measures ohmically pressure difference.Resistor proposal have low side current detecting and
High side current detection, low side scheme is that resistance is placed between load and circuit ground, and the pressure drop formed on resistance can be with simply
Amplifier amplifies；High side current detection refers to will test the high position that resistance is placed between supply voltage and load, low frontier inspection
The advantage of survey scheme is simple and inexpensive, however, many applications can't stand the grounding interference introduced due to detection resistance, it is special
It is not that higher load current (electric current of such as battery management system is up to hundreds of amperes) can make problem more serious, seriously affects
Other circuits of system work, such as telecommunication circuit, and high side current detection then eliminates the ground wire generated in low side detection scheme
Interference problem, but the detection amplifier processing of high side current testing requirements, close to the common-mode voltage of supply voltage, this common mode is electric
Pressure value range is very wide, as battery management system up to hectovolt more than, therefore, for the amplifier of high common-mode voltage must be selected,
This amplifier is expensive, at high cost.
Summary of the invention
The purpose of the present invention is to provide a kind of flash over-current detection circuit and its methods.
To achieve the above object, the invention provides the following technical scheme: a kind of flash over-current detection circuit, comprising:
Power supply unit, for providing power supply to electric current hysteresis comparator unit；
Electric current hysteresis comparator unit, for be connected between load and supply voltage and compared with load current and setting value
Reversion output low and high level afterwards；
Level conversion unit, the high level for exporting to electric current hysteresis comparator unit are converted into logic level.
Preferably, the electric current hysteresis comparator unit includes voltage comparator, resistance R4 and R5, the voltage comparator
Inverting input terminal power supply unit negative terminal is accessed by resistance R4, the non-inverting input terminal of voltage comparator connects voltage by resistance R5
The output end of comparator.
Preferably, the level conversion unit includes triode T1, T2, resistance R7, R8, R9, R10, R11 and R12, described
The base stage of triode T1 is connected by the output end of resistance R7 and voltage comparator, is led between the emitter and base stage of triode T1
Resistance R8 connection is crossed, the collector of triode T1 is grounded by resistance R9, and the collector of triode T1 passes through resistance R10 and three poles
The base stage of pipe T2 connects, and the base stage of triode T2 is grounded after being connect by resistance R11 with the emitter of triode T2, triode T2
Collector pass through resistance R12.
Preferably, said supply unit includes zener diode and resistance R6, and the cathode of the zener diode connects power supply
The anode of anode, zener diode is grounded by resistance R6.
A kind of flash over-current detecting method, comprising the following steps:
Voltage comparator receive the load current between supply voltage and load and compared with it is anti-after load current and setting value
Transfer out low and high level；
Level conversion unit converts the high level of output, output logic level to single-chip microcontroller；
Single-chip microcontroller calculates the load current after voltage comparator reversion.
Preferably, output low and high level is inverted after the relatively load current and setting value method particularly includes:
When load current increases, the voltage of voltage comparator non-inverting input terminal reduces, by voltage comparator homophase input
The voltage at end is compared with setting value, if being less than setting value, voltage comparator is reversed to low level by high level, if more than
Setting value, then voltage comparator is reversed to high level by low level；
When load current reduces, the voltage of voltage comparator non-inverting input terminal increases, by voltage comparator homophase input
The voltage at end is compared with setting value, if being less than setting value, voltage comparator is reversed to low level by high level, if more than
Setting value, then voltage comparator is reversed to high level by low level.
Preferably, the single-chip microcontroller calculates the load current after voltage comparator reversion method particularly includes:
Calculate the voltage of the reverse input end of voltage comparator；
The voltage that resistance R1 connects supply voltage cathode one end is calculated according to the low and high level of voltage comparator reversion output；
Load current is calculated by the voltage obtained.
Preferably, the voltage V of the reverse input end of the voltage comparator-Calculation formula are as follows:
In formula, R4 ' is the resistance value of resistance R4, and R2 ' is the resistance value of resistance R2, and Vz is the voltage value of zener diode, and Vo is
Voltage comparator receives the voltage value of power supply.
Preferably, the low and high level according to voltage comparator reversion output calculates resistance R1 and connects supply voltage cathode
The voltage of one end method particularly includes:
If voltage comparator exports high level, resistance R1 connects the calculation formula of the voltage Vc- of supply voltage cathode one end
Are as follows:
In formula, R3 ' is the resistance value of resistance R3, and R5 ' is the resistance value of resistance R5, and Vbus is the height electricity of voltage comparator output
It is flat；
If voltage comparator exports low level, resistance R1 connects the calculation formula of the voltage Vc- of supply voltage cathode one end
Are as follows:
In formula, Vbus_Vz is the low level of voltage comparator output.
Preferably, the calculation formula of the load current is as follows:
In formula, R1 ' is the resistance value of resistance R1.
As shown from the above technical solution, the invention has the following beneficial effects:
The present invention uses electric current hysteresis comparator unit, level conversion unit and chip microcontroller over-current detection, wherein electricity
Stream hysteresis comparator unit is built using comparator, triode, resistance etc. in level conversion unit, circuit is simple, it is at low cost,
Response is fast, thus the shortcomings that overcoming the higher cost of existing high-side current sample circuit.
Detailed description of the invention
Fig. 1 is electrical block diagram of the present invention；
Fig. 2 is power supply unit electrical block diagram of the present invention.
In figure: 1, power supply unit；2, electric current hysteresis comparator unit；3, level conversion unit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2: a kind of flash over-current detection circuit, including power supply unit
1, electric current hysteresis comparator unit 2 and level conversion unit 3, power supply unit include zener diode and resistance R6, the pressure stabilizing
The cathode of diode connects positive pole, and the anode of zener diode is grounded by resistance R6, in this way at the both ends of zener diode
A floating power supply is obtained, this power supply provides working power for comparator；
Electric current hysteresis comparator unit includes voltage comparator, resistance R2, R3, R4 and R5, the voltage comparator it is anti-
Phase input terminal accesses power supply unit negative terminal, voltage by 2 ports that resistance R4 accesses power supply unit negative terminal and voltage comparator
Power supply unit anode is accessed in 5 ports of comparator, and capacitor C1 connects and is followed by between 5 ports of voltage comparator and power supply unit anode
Ground, the non-inverting input terminal of voltage comparator connect the output end of voltage comparator, the model of voltage comparator by resistance R5
LMC7211。
Level conversion unit includes triode T1, T2, resistance R7, R8, R9, R10, R11 and R12, the triode T1's
Base stage is connected by the output end of resistance R7 and voltage comparator, is connected between the emitter and base stage of triode T1 by resistance R8
It connects and is followed by power supply, the collector of triode T1 is grounded by resistance R9, and the collector of triode T1 passes through resistance R10 and triode
The base stage of T2 connects, and the base stage of triode T2 is grounded after being connect by resistance R11 with the emitter of triode T2, triode T2's
Collector accesses the supply voltage united after single-chip microcontroller by resistance R12 order piece body, the model of triode T1
The model MMBT4401 of PMBT2907A, triode T2.
A kind of flash over-current detecting method, comprising the following steps:
When load current increases, the voltage of voltage comparator non-inverting input terminal reduces, by voltage comparator homophase input
The voltage at end is compared with setting value, if being less than setting value, voltage comparator is reversed to low level by high level, if more than
Setting value, then voltage comparator is reversed to high level by low level；
When load current reduces, the voltage of voltage comparator non-inverting input terminal increases, by voltage comparator homophase input
The voltage at end is compared with setting value, if being less than setting value, voltage comparator is reversed to low level by high level, if more than
Setting value, then voltage comparator is reversed to high level by low level；
High level, which will be received, by triode T1 is converted to 0V low level and high level, the high level of triode T1 output
0V low level and the consistent 5V logic level of logic, output logic level to single-chip microcontroller are converted to by triode T2；
Single-chip microcontroller calculates the voltage V of the reverse input end of voltage comparator-, calculation formula are as follows:
In formula, R4 ' is the resistance value of resistance R4, and R2 ' is the resistance value of resistance R2, and Vz is the voltage value of zener diode, and Vo is
Voltage comparator receives the voltage value of power supply；
Single-chip microcontroller calculates the electricity that resistance R1 connects power cathode one end according to the low and high level of voltage comparator reversion output
Pressure, if voltage comparator exports high level, resistance R1 connects the calculation formula of the voltage Vc- of supply voltage cathode one end are as follows:
In formula, R3 ' is the resistance value of resistance R3, and R5 ' is the resistance value of resistance R5, and Vbus is the height electricity of voltage comparator output
It is flat；
If voltage comparator exports low level, resistance R1 connects the calculation formula of the voltage Vc- of supply voltage cathode one end
Are as follows:
In formula, Vbus_Vz is the low level of voltage comparator output；
Load current, calculation formula are calculated by the voltage obtained are as follows:
In formula, R1 ' is the resistance value of resistance R1.
The course of work:
It is connected between supply voltage and load using resistance R1, over-current detection circuit of the invention is respectively connected to R1's
Both ends do not consider hysteresis voltage value, and when load current increases, the electric current for flowing through R1 also increases, since resistance R1 connects power supply electricity
The voltage Vc+ of positive pressure pole one end is constant, then the voltage Vc- that resistance R1 connects supply voltage cathode one end reduces, voltage comparator U1
Non-inverting input terminal voltage reduces, and the voltage of voltage comparator non-inverting input terminal is compared with setting value, if being less than setting value,
Then voltage comparator is reversed to low level by high level, and single-chip microcontroller calculates the voltage V of the reverse input end of voltage comparator-,
Pass through voltage V again-The voltage Vc- that resistance R1 connects supply voltage cathode one end is calculated, voltage comparator reversion is finally calculated
Load current afterwards, if more than setting value, then voltage comparator is reversed to high level by low level, will be received by triode T1
0V low level and high level are converted to high level, the high level of triode T1 output is converted to 0V low level by triode T2
With the consistent 5V logic level of logic, logic level is exported to single-chip microcontroller, single-chip microcontroller calculates the reversed input of voltage comparator
The voltage V at end-, then pass through voltage V-The voltage Vc- that resistance R1 connects supply voltage cathode one end is calculated, voltage is finally calculated
Load current after comparator reversion；
When load current reduces, the electric current for flowing through R1 also reduces, since resistance R1 connects the electricity of supply voltage anode one end
Press Vc+ constant, then the voltage Vc- that resistance R1 connects supply voltage cathode one end increases, voltage comparator U1 non-inverting input terminal voltage
Increase, the voltage of voltage comparator non-inverting input terminal be compared with setting value, if less than setting value, voltage comparator by
High level is reversed to low level, and single-chip microcontroller calculates the voltage V of the reverse input end of voltage comparator-, then pass through voltage V-It calculates
Resistance R1 meets the voltage Vc- of supply voltage cathode one end out, the load current after finally calculating voltage comparator reversion, if greatly
In setting value, then voltage comparator is reversed to high level by low level, will receive high level by triode T1 and be converted to 0V
The high level of low level and high level, triode T1 output is converted to 0V low level by triode T2 and the consistent 5V of logic is patrolled
Level is collected, exports logic level to single-chip microcontroller, single-chip microcontroller calculates the voltage V of the reverse input end of voltage comparator-, then pass through
Voltage V-The voltage Vc- that resistance R1 connects supply voltage cathode one end is calculated, it is negative after finally calculating voltage comparator reversion
Carry electric current.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of flash over-current detection circuit characterized by comprising
Power supply unit, for providing power supply to electric current hysteresis comparator unit；
Electric current hysteresis comparator unit, for be connected between load and supply voltage and compared with after load current and setting value it is anti-
Transfer out low and high level；
Level conversion unit, the high level for exporting to electric current hysteresis comparator unit are converted into logic level.
2. a kind of flash over-current detection circuit according to claim 1, it is characterised in that: the electric current hysteresis comparator list
Member includes voltage comparator, resistance R4 and R5, and the inverting input terminal of the voltage comparator accesses power supply unit by resistance R4
Negative terminal, the non-inverting input terminal of voltage comparator connect the output end of voltage comparator by resistance R5.
3. a kind of flash over-current detection circuit according to claim 1, it is characterised in that: the level conversion unit includes
Triode T1, T2, resistance R7, R8, R9, R10, R11 and R12, the base stage of the triode T1 is by resistance R7 compared with voltage
The output end of device connects, and is connected between the emitter and base stage of triode T1 by resistance R8, the collector of triode T1 passes through
The collector of resistance R9 ground connection, triode T1 is connect by resistance R10 with the base stage of triode T2, and the base stage of triode T2 passes through
Resistance R11 is grounded after connecting with the emitter of triode T2, and the collector of triode T2 passes through resistance R12.
4. a kind of flash over-current detection circuit according to claim 1, it is characterised in that: said supply unit includes pressure stabilizing
Diode and resistance R6, the cathode of the zener diode connect positive pole, and the anode of zener diode is grounded by resistance R6.
5. a kind of flash over-current detecting method of the circuit as described in claim any one of 1-4, comprising the following steps:
Voltage comparator receive the load current between supply voltage and load and compared with invert after load current and setting value it is defeated
Low and high level out；
Level conversion unit converts the high level of output, output logic level to single-chip microcontroller；
Single-chip microcontroller calculates the load current after voltage comparator reversion.
6. a kind of flash over-current detecting method according to claim 5, it is characterised in that: described to compare load current and set
Reversion output low and high level after definite value method particularly includes:
When load current increases, the voltage of voltage comparator non-inverting input terminal reduces, by voltage comparator non-inverting input terminal
Voltage is compared with setting value, if being less than setting value, voltage comparator is reversed to low level by high level, if more than setting
Value, then voltage comparator is reversed to high level by low level；
When load current reduces, the voltage of voltage comparator non-inverting input terminal increases, by voltage comparator non-inverting input terminal
Voltage is compared with setting value, if being less than setting value, voltage comparator is reversed to low level by high level, if more than setting
Value, then voltage comparator is reversed to high level by low level.
7. a kind of flash over-current detecting method according to claim 5, it is characterised in that: the single-chip microcontroller calculates voltage
Load current after comparator reversion method particularly includes:
Calculate the voltage of the reverse input end of voltage comparator；
The voltage that resistance R1 connects supply voltage cathode one end is calculated according to the low and high level of voltage comparator reversion output；
Load current is calculated by the voltage obtained.
8. a kind of flash over-current detecting method according to claim 7, it is characterised in that: the voltage comparator it is reversed
The voltage V of input terminal-Calculation formula are as follows:
In formula, R4 ' is the resistance value of resistance R4, and R2 ' is the resistance value of resistance R2, and Vz is the voltage value of zener diode, and Vo is voltage
Comparator receives the voltage value of power supply.
9. a kind of flash over-current detecting method according to claim 7, it is characterised in that: described anti-according to voltage comparator
The low and high level transferred out calculates the voltage that resistance R1 connects supply voltage cathode one end method particularly includes:
If voltage comparator exports high level, resistance R1 connects the calculation formula of the voltage Vc- of supply voltage cathode one end are as follows:
In formula, R3 ' is the resistance value of resistance R3, and R5 ' is the resistance value of resistance R5, and Vbus is the high level of voltage comparator output；
If voltage comparator exports low level, resistance R1 connects the calculation formula of the voltage Vc- of supply voltage cathode one end are as follows:
In formula, Vbus_Vz is the low level of voltage comparator output.
10. a kind of flash over-current detecting method according to claim 7, it is characterised in that: the calculating of the load current
Formula is as follows:
In formula, R1 ' is the resistance value of resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910803162.1A CN110456141A (en) | 2019-08-28 | 2019-08-28 | A kind of flash over-current detection circuit and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910803162.1A CN110456141A (en) | 2019-08-28 | 2019-08-28 | A kind of flash over-current detection circuit and its method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110456141A true CN110456141A (en) | 2019-11-15 |
Family
ID=68489631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910803162.1A Pending CN110456141A (en) | 2019-08-28 | 2019-08-28 | A kind of flash over-current detection circuit and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110456141A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4362331A1 (en) | 2022-10-26 | 2024-05-01 | STMicroelectronics International N.V. | Current sensing circuit, corresponding system and vehicle |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001119850A (en) * | 1999-10-15 | 2001-04-27 | Yazaki Corp | Device for controlling load current at overcurrent, device for detecting blown out filament in load, and load current detection and supply controller |
| CN1755376A (en) * | 2004-09-30 | 2006-04-05 | 日产自动车株式会社 | Overcurrent detection method and testing circuit |
| CN2783334Y (en) * | 2005-02-23 | 2006-05-24 | 华为技术有限公司 | Over current detector |
| CN102263402A (en) * | 2010-05-31 | 2011-11-30 | 研祥智能科技股份有限公司 | Over-current protection circuit and over-current protection method for DC power supply |
| CN103094887A (en) * | 2011-11-07 | 2013-05-08 | 湖北三环汽车电器有限公司 | Overcurrent and over-temperature protection control circuit |
| CN204405727U (en) * | 2014-12-26 | 2015-06-17 | 武汉泓承科技有限公司 | A kind ofly inputted/the circuit of under-voltage detection for electronic equipment |
| CN204441851U (en) * | 2015-03-31 | 2015-07-01 | 长安大学 | A kind of current foldback circuit |
| CN104849536A (en) * | 2015-06-11 | 2015-08-19 | 中国人民解放军国防科学技术大学 | Detection circuit for serial lithium battery pack protection chip |
| CN105680520A (en) * | 2016-03-22 | 2016-06-15 | 深圳市清友能源技术有限公司 | Discharging current hardware protection circuit for vehicle-mounted lithium battery pack of electric vehicle |
| CN207964928U (en) * | 2018-02-12 | 2018-10-12 | 卡乐电子(苏州)有限责任公司 | A kind of current sampling circuit suitable for high pressure detection |
| CN208257383U (en) * | 2018-05-21 | 2018-12-18 | 三峡大学 | A kind of self-locking over-voltage over-current protection circuit |
| CN210803575U (en) * | 2019-08-28 | 2020-06-19 | 安徽贵博新能科技有限公司 | High-side overcurrent detection circuit |
-
2019
- 2019-08-28 CN CN201910803162.1A patent/CN110456141A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001119850A (en) * | 1999-10-15 | 2001-04-27 | Yazaki Corp | Device for controlling load current at overcurrent, device for detecting blown out filament in load, and load current detection and supply controller |
| CN1755376A (en) * | 2004-09-30 | 2006-04-05 | 日产自动车株式会社 | Overcurrent detection method and testing circuit |
| CN2783334Y (en) * | 2005-02-23 | 2006-05-24 | 华为技术有限公司 | Over current detector |
| CN102263402A (en) * | 2010-05-31 | 2011-11-30 | 研祥智能科技股份有限公司 | Over-current protection circuit and over-current protection method for DC power supply |
| CN103094887A (en) * | 2011-11-07 | 2013-05-08 | 湖北三环汽车电器有限公司 | Overcurrent and over-temperature protection control circuit |
| CN204405727U (en) * | 2014-12-26 | 2015-06-17 | 武汉泓承科技有限公司 | A kind ofly inputted/the circuit of under-voltage detection for electronic equipment |
| CN204441851U (en) * | 2015-03-31 | 2015-07-01 | 长安大学 | A kind of current foldback circuit |
| CN104849536A (en) * | 2015-06-11 | 2015-08-19 | 中国人民解放军国防科学技术大学 | Detection circuit for serial lithium battery pack protection chip |
| CN105680520A (en) * | 2016-03-22 | 2016-06-15 | 深圳市清友能源技术有限公司 | Discharging current hardware protection circuit for vehicle-mounted lithium battery pack of electric vehicle |
| CN207964928U (en) * | 2018-02-12 | 2018-10-12 | 卡乐电子(苏州)有限责任公司 | A kind of current sampling circuit suitable for high pressure detection |
| CN208257383U (en) * | 2018-05-21 | 2018-12-18 | 三峡大学 | A kind of self-locking over-voltage over-current protection circuit |
| CN210803575U (en) * | 2019-08-28 | 2020-06-19 | 安徽贵博新能科技有限公司 | High-side overcurrent detection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4362331A1 (en) | 2022-10-26 | 2024-05-01 | STMicroelectronics International N.V. | Current sensing circuit, corresponding system and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203630198U (en) | Battery voltage detection circuit | |
| CN103424601B (en) | A kind of voltage detecting circuit | |
| CN107219402B (en) | A kind of circuit for quick measurement of DC resistance for power module port | |
| CN103412168B (en) | A kind of high-precision current sampling circuit of intelligent electric meter | |
| CN110208597B (en) | Self-powered wireless current monitoring system based on single-winding current transformer | |
| CN103063979A (en) | Load open-circuit detection circuit | |
| CN203444012U (en) | High accuracy and rapid speed measurement circuit of wide range current in power system | |
| CN203759112U (en) | High-frequency current detection circuit | |
| CN102768078B (en) | Automatic resistance compensation method for temperature-measuring conductors for two-wire thermal resistor | |
| CN103454509B (en) | Mobile phone charging detection system and method | |
| CN110456141A (en) | A kind of flash over-current detection circuit and its method | |
| CN107765084B (en) | Universal voltage input power frequency signal frequency measurement system | |
| CN105223533A (en) | A kind of superhigh precision responds DC current prover circuit fast | |
| CN206132836U (en) | Current inspecting circuit and device | |
| CN207742316U (en) | Battery detection circuit and battery management system | |
| CN108957100A (en) | A kind of current detection means | |
| CN109100052A (en) | A kind of detection circuit of PT100 temperature sensor | |
| CN102710248A (en) | Isolated voltage acquisition circuit | |
| CN205384360U (en) | BMS current parameter calibrating device | |
| CN206962444U (en) | One kind input over under-voltage protection circuit | |
| CN207516439U (en) | Alternating current acquisition module and detection device | |
| CN208537614U (en) | Current detection means | |
| CN208707546U (en) | Constant current output control circuit | |
| CN210803575U (en) | High-side overcurrent detection circuit | |
| CN201489094U (en) | Battery electric quantity warning circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |