CN218570210U - Circuit for accelerating turn-off of MOS (Metal oxide semiconductor) tube during BMS (Battery management System) protection - Google Patents
Circuit for accelerating turn-off of MOS (Metal oxide semiconductor) tube during BMS (Battery management System) protection Download PDFInfo
- Publication number
- CN218570210U CN218570210U CN202222641337.3U CN202222641337U CN218570210U CN 218570210 U CN218570210 U CN 218570210U CN 202222641337 U CN202222641337 U CN 202222641337U CN 218570210 U CN218570210 U CN 218570210U
- Authority
- CN
- China
- Prior art keywords
- circuit
- electrically connected
- resistor
- mos
- triode
- 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.)
- Active
Links
- 229910044991 metal oxide Inorganic materials 0.000 title abstract description 5
- 150000004706 metal oxides Chemical class 0.000 title abstract description 5
- 239000004065 semiconductor Substances 0.000 title abstract description 5
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a circuit for accelerating the turn-off of MOS (metal oxide semiconductor) tubes during BMS (battery management system) protection; the protection circuit comprises a battery anode output protection circuit and a battery cathode output protection circuit, wherein electronic components used in the battery anode output protection circuit and the battery cathode output protection circuit are the same; the battery positive electrode output protection circuit comprises an MCU, one end of the MCU is electrically connected with a resistor RS, the resistor RS is electrically connected with the positive electrode end of an output circuit, one end of the resistor RS is electrically connected with an MOS tube M1, one end of the MOS tube M1 is electrically connected with the MCU, the other end of the MOS tube M1 is electrically connected with a capacitor Ca, the capacitor Ca is connected with a resistor Ra in series, the other end of the resistor Ra is electrically connected with a triode Q1, and the other two ends of the triode Q1 are respectively electrically connected with the two ends of the MOS tube M1; the utility model discloses can turn-off MOS pipe M1 fast, the time that the great current was born in significantly reducing realizes carrying out safety protection to MOS pipe M1.
Description
Technical Field
The utility model belongs to the technical field of the BMS protection, concretely relates to turn-off circuit of MOS pipe with higher speed during BMS protection.
Background
The conventional battery BMS control board triggers protection under the abnormal states of positive and negative short circuit, overcurrent, over-temperature, overvoltage and the like, and shuts off an MOS tube in an accelerating manner when shutting off the MOS, so that the effect of quickly shutting off the MOS during protection is achieved. Battery BMS board controls the output of battery, the switch under the abnormal state through the MOS pipe, and especially when the short circuit, the electric current that flows through the MOS pipe is the geometric multiple and increases, and present MOS pipe turn-off circuit often is relatively weak, can lead to MOS shutoff speed slow, and MOS bears the time length of heavy current, burns out the MOS pipe easily.
In the protection action of the BMS, the MOS transistor in the prior art is turned off by pulling down the GS current of the MOS transistor inside the MCU, as shown in fig. 1, 2 and 3. The pull-down current in the MCU is very weak, so that the MOS tube is slow to turn off and long in turn-off time, and the current in abnormal states such as short circuit, overcurrent and the like is very large, so that the MOS tube is easy to burn out.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circuit of turn-off MOS pipe with higher speed during BMS protection to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a circuit for accelerating the turn-off of an MOS (metal oxide semiconductor) tube during BMS (battery management system) protection comprises a battery anode output protection circuit and a battery cathode output protection circuit, wherein electronic components used in the battery anode output protection circuit and the battery cathode output protection circuit are the same;
the battery positive electrode output protection circuit comprises an MCU, one end of the MCU is electrically connected with a resistor RS, the resistor RS is electrically connected with the positive electrode end of an output circuit, one end of the resistor RS is electrically connected with an MOS tube M1, one end of the MOS tube M1 is electrically connected with the MCU, the other end of the MOS tube M1 is electrically connected with a capacitor Ca, the capacitor Ca is connected with a resistor Ra in series, the other end of the resistor Ra is electrically connected with a triode Q1, and the other two ends of the triode Q1 are respectively electrically connected with the two ends of the MOS tube M1;
the MOS tube M1 is electrically connected to the negative end of the output circuit in the battery negative electrode output protection circuit, the resistor RS is still electrically connected to the output positive end of the circuit, and other electronic components are still electrically connected according to the connection mode of the battery positive electrode output protection circuit.
Preferably, one side of the MCU is electrically connected with a battery pack, the anode and the cathode of the battery pack are respectively electrically connected with the MCU, the cathode of the battery pack is connected with the resistor RS in series, and the two ends of the resistor RS are electrically connected with the MCU.
Preferably, one end of the resistor RS is electrically connected to the S end of the MOS transistor M1, the D end of the MOS transistor M1 is electrically connected to one end of the capacitor Ca, and the other end of the resistor Ra is electrically connected to the base of the transistor Q1.
Preferably, the collector of the triode Q1 is electrically connected to the G terminal of the MOS transistor M1, the emitter of the triode Q1 is electrically connected to the S terminal of the MOS transistor M1, and one end of the resistor R1 is electrically connected to the G terminal of the MOS transistor M1.
Preferably, a load is electrically connected between the positive terminal of the output circuit and the negative terminal of the output circuit, and the load is an inductor and a capacitor which are connected in parallel.
Preferably, the resistor RS is a detection resistor, and the resistor RS is used for detecting a signal by the MCU through the resistor RS when an output is short-circuited or abnormal over-current occurs.
Preferably, the resistor R1 is used as a control switch, that is, the MCU turns off the MOS transistor M1 through the resistor R1, and at this time, the MOS transistor M1 is turned off.
Preferably, when the MOS transistor M1 is turned off, due to the short circuit or the overcurrent condition existing in the circuit, the voltage at the D terminal of the MOS transistor M1 increases, and the voltage reaches the base of the triode Q1 through the capacitor Ca and the resistor Ra, and at this time, the triode Q1 is turned on.
Preferably, when the triode Q1 is turned on, the G terminal and the S terminal of the MOS transistor M1 are discharged, so as to achieve the effect of quickly turning off the MOS transistor M1.
Preferably, the triode Q1 is electrically connected with the transistor or the MOS transistor.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses triode Q1 has been increased, resistance Ra and electric capacity Ca, and there is the short circuit or overflow the existence in the circuit, MOS pipe M1 ' S D utmost point voltage can rise this moment, this voltage can be through electric capacity Ca, resistance Ra is to triode Q1 ' S base, when the voltage flows triode Q1, triode Q1 is switched on, thereby discharge MOS pipe M1 ' S G end and S end, reach the effect of quick turn-off MOS pipe M1, and then realize when the positive negative short circuit test of output, BMS protection action back, the turn-off only needs 4us, the time that the great reduction bore the heavy current, the realization carries out safety protection to MOS pipe M1.
Drawings
FIG. 1 is a schematic diagram of a prior art battery cathode output protection circuit;
FIG. 2 is a schematic diagram of a prior art battery positive output protection circuit;
FIG. 3 is a schematic view of the current flow direction of the prior art;
fig. 4 is a schematic diagram of a battery negative output protection circuit of the present invention;
fig. 5 is a schematic diagram of the battery positive output protection circuit of the present invention;
fig. 6 is a schematic current direction diagram of the battery negative output protection circuit of the present invention;
fig. 7 is a schematic current direction diagram of the battery positive output protection circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: a circuit for accelerating the turn-off of an MOS (metal oxide semiconductor) tube during BMS (battery management system) protection comprises a battery anode output protection circuit and a battery cathode output protection circuit, wherein electronic components used in the battery anode output protection circuit and the battery cathode output protection circuit are the same;
the battery positive electrode output protection circuit comprises an MCU, one end of the MCU is electrically connected with a resistor RS, the resistor RS is electrically connected with the positive electrode end of an output circuit, one end of the resistor RS is electrically connected with an MOS tube M1, one end of the MOS tube M1 is electrically connected with the MCU, the other end of the MOS tube M1 is electrically connected with a capacitor Ca, the capacitor Ca is connected with a resistor Ra in series, the other end of the resistor Ra is electrically connected with a triode Q1, and the other two ends of the triode Q1 are respectively electrically connected with the two ends of the MOS tube M1;
the MOS tube M1 is electrically connected to the negative end of the output circuit in the battery negative electrode output protection circuit, the resistor RS is still electrically connected to the output positive end of the circuit, and other electronic components are still electrically connected according to the connection mode of the battery positive electrode output protection circuit.
In order to realize the power supply operation of the system, and realize the electric connection with the MCU, and realize the control adjustment, in this embodiment, preferably, one side of the MCU is electrically connected with a battery pack, the positive electrode and the negative electrode of the battery pack are respectively electrically connected with the MCU, the negative electrode of the battery pack is connected in series with the resistor RS, and both ends of the resistor RS are electrically connected with the MCU.
In order to realize the electrical connection of the voltage relief circuit structure, in this embodiment, preferably, one end of the resistor RS is electrically connected to the S end of the MOS transistor M1, the D end of the MOS transistor M1 is electrically connected to one end of the capacitor Ca, and the other end of the resistor Ra is electrically connected to the base of the transistor Q1.
In order to implement the voltage relief processing on the MOS transistor M1, in this embodiment, preferably, the collector of the triode Q1 is electrically connected to the G terminal of the MOS transistor M1, the emitter of the triode Q1 is electrically connected to the S terminal of the MOS transistor M1, and one end of the resistor R1 is electrically connected to the G terminal of the MOS transistor M1.
In order to realize the process of the analog operation, in this embodiment, preferably, a load is electrically connected between the positive terminal of the output circuit and the negative terminal of the output circuit, and the load is an inductor and a capacitor connected in parallel.
In order to detect the short circuit or overcurrent abnormality of the circuit at any time, in this embodiment, preferably, the resistor RS is a detection resistor, and the resistor RS is configured to detect a signal through the resistor RS when the short circuit or overcurrent abnormality occurs in the output.
In order to implement the turn-off control adjustment of the circuit, in this embodiment, preferably, the resistor R1 is used as a control switch, that is, the MCU turns off the MOS transistor M1 through the resistor R1, and at this time, the MOS transistor M1 is turned off.
In order to implement conduction of the transistor Q1 and implement the voltage relief, in this embodiment, preferably, when the MOS transistor M1 is turned off, due to a short circuit or an overcurrent condition existing in a circuit, a voltage at a D-terminal of the MOS transistor M1 increases, and the voltage reaches a base of the transistor Q1 through the capacitor Ca and the resistor Ra, where the transistor Q1 is turned on.
In order to implement the pressure relief processing on the MOS transistor M1, in this embodiment, it is preferable that when the triode Q1 is turned on, the G end and the S end of the MOS transistor M1 are discharged, so as to achieve the effect of quickly turning off the MOS transistor M1.
In order to improve the diversity of the circuit design, in this embodiment, preferably, the transistor Q1 is electrically connected to the transistor, or to the MOS transistor.
The utility model discloses a theory of operation and use flow: the utility model discloses when using, take a 36V7.5AH's battery as an example: when the positive negative short circuit of output tests, when the output takes place the short circuit or when overflowing unusually, MCU detects the short circuit or overflow unusual signal through resistance RS, MCU can begin to control through resistance R1 and turn-off MOS pipe M1, when MOS pipe M1 begins to turn-off, because the circuit has the short circuit or overflows the existence, MOS pipe M1 ' S D terminal voltage can rise this moment, this voltage can be through electric capacity Ca, resistance Ra flows in triode Q1 ' S base, triode Q1 is switched on this moment, thereby discharge MOS pipe M1 ' S G end and S end, reach the effect of turning off MOS pipe M1 fast, and circuit in the past is when carrying out the turn-off, need 12us just can turn off the MOS pipe completely, the utility model discloses when carrying out the turn-off, only need 4us, the time that the greatly reduced bore heavy current, the security of MOS pipe M1 of protection.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a circuit of turn-off MOS pipe with higher speed during BMS protection, includes battery positive pole output protection circuit and battery negative pole output protection circuit, its characterized in that: the battery anode output protection circuit and the battery cathode output protection circuit are the same in electronic components;
the battery positive electrode output protection circuit comprises an MCU, one end of the MCU is electrically connected with a resistor RS, the resistor RS is electrically connected with the positive electrode end of an output circuit, one end of the resistor RS is electrically connected with an MOS tube M1, one end of the MOS tube M1 is electrically connected with the MCU, the other end of the MOS tube M1 is electrically connected with a capacitor Ca, the capacitor Ca is connected with a resistor Ra in series, the other end of the resistor Ra is electrically connected with a triode Q1, and the other two ends of the triode Q1 are respectively electrically connected with the two ends of the MOS tube M1;
the MOS tube M1 is electrically connected to the negative end of the output circuit in the battery negative electrode output protection circuit, the resistor RS is still electrically connected to the output positive end of the circuit, and other electronic components are still electrically connected according to the connection mode of the battery positive electrode output protection circuit.
2. The circuit for accelerating the turn-off of MOS transistor during BMS protection according to claim 1, wherein: one side electric connection of MCU has the group battery, positive pole and the negative pole of group battery respectively with MCU electric connection, the negative pole of group battery with resistance RS series connection, resistance RS's both ends all with MCU electric connection.
3. The circuit for accelerating the turn-off of MOS transistor during BMS protection according to claim 1, wherein: one end of the resistor RS is electrically connected with the S end of the MOS tube M1, the D end of the MOS tube M1 is electrically connected with one end of the capacitor Ca, and the other end of the resistor Ra is electrically connected with the base of the triode Q1.
4. The circuit for accelerating the turn-off of the MOS tube during BMS protection according to claim 1, wherein: triode Q1 'S collecting electrode with MOS pipe M1' S G end electric connection, triode Q1 'S projecting pole with MOS pipe M1' S S end electric connection, resistance R1 'S one end electric connection is in MOS pipe M1' S G is served.
5. The circuit for accelerating the turn-off of MOS transistor during BMS protection according to claim 1, wherein: and a load is electrically connected between the positive end of the output circuit and the negative end of the output circuit, and the load is an inductor and a capacitor which are connected in parallel.
6. The circuit for accelerating the turn-off of MOS transistor during BMS protection according to claim 1, wherein: the resistor RS is a detection resistor, and the resistor RS is used for detecting a signal through the resistor RS by the MCU when short circuit or overcurrent abnormity occurs in output.
7. The circuit for accelerating the turn-off of MOS transistor during BMS protection according to claim 6, wherein: the resistor R1 is used as a control switch, namely the MCU can switch off the MOS tube M1 through the resistor R1, and at the moment, the MOS tube M1 is switched off.
8. The circuit for accelerating turn-off of MOS transistor in BMS protection according to claim 7, wherein: when the MOS transistor M1 is turned off, due to the short circuit or overcurrent condition of the circuit, the voltage at the D-terminal of the MOS transistor M1 increases, and the voltage reaches the base of the triode Q1 through the capacitor Ca and the resistor Ra, and at this time, the triode Q1 is turned on.
9. The circuit for accelerating the turn-off of the MOS transistor during BMS protection according to claim 8, wherein: when the triode Q1 is conducted, the G end and the S end of the MOS tube M1 are discharged, and the effect of quickly switching off the MOS tube M1 is achieved.
10. The circuit for accelerating turn-off of MOS transistor in BMS protection according to claim 8, wherein: the triode Q1 is electrically connected with the MOS tube except for the triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222641337.3U CN218570210U (en) | 2022-10-09 | 2022-10-09 | Circuit for accelerating turn-off of MOS (Metal oxide semiconductor) tube during BMS (Battery management System) protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222641337.3U CN218570210U (en) | 2022-10-09 | 2022-10-09 | Circuit for accelerating turn-off of MOS (Metal oxide semiconductor) tube during BMS (Battery management System) protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218570210U true CN218570210U (en) | 2023-03-03 |
Family
ID=85315830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222641337.3U Active CN218570210U (en) | 2022-10-09 | 2022-10-09 | Circuit for accelerating turn-off of MOS (Metal oxide semiconductor) tube during BMS (Battery management System) protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218570210U (en) |
-
2022
- 2022-10-09 CN CN202222641337.3U patent/CN218570210U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201898330U (en) | Reverse-connection-preventive circuit | |
| CN201946978U (en) | Circuit obtaining electricity from high-voltage direct-current bus | |
| CN218570210U (en) | Circuit for accelerating turn-off of MOS (Metal oxide semiconductor) tube during BMS (Battery management System) protection | |
| CN205231727U (en) | Switching power supply output connects battery to join conversely protection automatic control circuit | |
| CN108199568A (en) | A kind of inhibition in-rush current limiting circuit | |
| CN111766488A (en) | Online insulation detection method and detection circuit for three-phase grid-connected inverter | |
| CN104057181A (en) | Open-phase protection circuit for inverter welding machine | |
| CN110571754A (en) | Solid-state direct current breaker | |
| CN202997559U (en) | Input anti reversal connection protection circuit of solar energy controller | |
| CN212305282U (en) | IGBT over-current protection circuit and device | |
| CN212845733U (en) | IGBT load short-circuit protection testing device | |
| CN203944975U (en) | For the open-phase protection circuit of inverter type welder | |
| CN203491681U (en) | Battery over-discharge protection circuit for computer | |
| CN203596806U (en) | Electronic switch protection module in hybrid relay | |
| CN203339686U (en) | Constant current source short circuit protection inhibition circuit | |
| CN105515360A (en) | Short-circuit protection circuit based on double operational amplifiers | |
| CN207218305U (en) | Short-circuit protection circuit and battery charger | |
| CN201904722U (en) | Improved BUCK circuit | |
| CN205490120U (en) | Put short -circuit protection circuit based on two fortune | |
| CN210693429U (en) | Solid-state direct current breaker | |
| CN109039064A (en) | A kind of shunt regulator device of the anti-single power supply shorted diode of spacecraft | |
| CN218526303U (en) | High current-carrying electronic switch with breakdown protection function | |
| CN102723703A (en) | Surge current suppression circuit and lighting fixture | |
| CN210958142U (en) | Soft start circuit based on brake resistor | |
| CN220156221U (en) | Low-voltage direct-current power distribution network line protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240312 Address after: No. 3000, Qiantangjiang Road, Qidong Economic Development Zone, Nantong City, Jiangsu Province, 226200 Patentee after: JIANGSU JIEJIE MICROELECTRONICS Co.,Ltd. Country or region after: China Address before: H1-7, H1-8, China Internet of Things International Innovation Park, No. 6, Jingxian Road, Xinwu District, Wuxi City, Jiangsu Province, 214000 Patentee before: Jiejie Microelectronics (Wuxi) Technology Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |