CN213072136U - Circuit for realizing negative pressure treatment of BMS system through controlling MOS pipe group - Google Patents
Circuit for realizing negative pressure treatment of BMS system through controlling MOS pipe group Download PDFInfo
- Publication number
- CN213072136U CN213072136U CN202021362642.3U CN202021362642U CN213072136U CN 213072136 U CN213072136 U CN 213072136U CN 202021362642 U CN202021362642 U CN 202021362642U CN 213072136 U CN213072136 U CN 213072136U
- Authority
- CN
- China
- Prior art keywords
- battery
- circuit
- mos
- negative pressure
- tubes
- 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
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a BMS system realizes circuit that negative pressure was handled through control MOS nest of tubes, include: BMS system chip, MOS nest of tubes, negative pressure treatment circuit; the BMS system chip is connected with the negative pressure processing circuit through the MOS tube group; when the battery system works normally, the BMS system chip detects that the battery circuit is normal, the discharge MOS tube in the MOS tube group is opened, the negative pressure processing circuit is in a cut-off state, and the negative pressure processing circuit does not work; when the battery system is short-circuited, the BMS system chip detects the short circuit of the battery circuit, the MOS pipe group is continuously opened, the MOS pipe group is closed in a delayed mode, the negative pressure processing circuit works, the MOS pipe group is normally closed, and the normal operation of the battery is guaranteed. The utility model discloses can eliminate the influence that the too big produced self-inductance's of electric current variation electromotive force produced when taking place the battery short circuit, guarantee that the MOS pipe can normally close, improve battery product quality, guarantee product safety.
Description
Technical Field
The utility model relates to a battery charge-discharge control technical field especially relates to a BMS system realizes the circuit that the negative pressure was handled through control MOS nest of tubes.
Background
With the development of science and technology, new energy is particularly prominent in our lives, green and environment-friendly are advocated at present, and a large number of electric tools such as new energy automobiles, electric vehicles, various dust collectors, floor sweeping machines and robots cannot be powered on in the market. The lithium cell can take place the short circuit in the use inevitable, and when the lithium cell took place the short circuit externally, the MOS pipe execution turn-off command behind the BMS system detected short circuit current, because the current change is big this moment, produced the self-inductance phenomenon on the circuit to produce higher negative pressure, lead to discharging the MOS pipe delay and close, there is the possibility that the MOS damaged of discharging, still can bring the potential safety hazard problem.
Accordingly, there is a need in the art for improvements.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem who solves is: the BMS system is provided with a circuit for realizing negative pressure treatment by controlling the MOS tube set so as to solve the problems in the prior art.
According to the utility model discloses an aspect of embodiment discloses a BMS system realizes negative pressure treatment's circuit through control MOS nest of tubes, include:
BMS system chip, MOS nest of tubes, negative pressure treatment circuit;
the BMS system chip is connected with the negative pressure processing circuit through the MOS tube group;
when the battery system works normally, the BMS system chip detects that the battery circuit is normal, the discharge MOS tube in the MOS tube group is opened, the negative pressure processing circuit is in a cut-off state, and the negative pressure processing circuit does not work;
when the short circuit takes place for battery system, BMS system chip detects the battery circuit short circuit, MOS nest of tubes carries out the turn-off action, because battery short circuit produces the electric current grow to electromotive force grow makes MOS nest of tubes lasts to open, and MOS nest of tubes time delay is closed, negative pressure treatment circuit work makes MOS nest of tubes normally closes, guarantees the battery normal operating.
Based on the utility model discloses in another embodiment of the circuit that above-mentioned BMS system realized negative pressure through control MOS nest of tubes and handled, negative pressure treatment circuit includes:
the transistor Q1, the diode D2, the resistor R9 and the resistor R15;
the base electrode of the triode Q1 is connected with the diode D2 and the resistor R9;
the collector of the triode Q1 is connected with the BMS system chip;
the emitting electrode of the triode Q1 is connected with a battery P +;
the other end of the diode D2 is grounded through the resistor R15;
a PACKDIV pin of the BMS system chip is connected with a battery cathode;
when the battery system works normally, the BMS system chip detects that the battery circuit is normal, the discharge MOS tube in the MOS tube group is opened, the triode Q1 is in a cut-off state, and the negative pressure processing circuit does not work;
when the battery system takes place the short circuit, BMS system chip detects the battery circuit short circuit, MOS nest of tubes carries out the turn-off action, produces the electric current grow because the battery short circuit to the electromotive force grow, makes MOS nest of tubes lasts to open, and MOS nest of tubes time delay is closed, works as battery P + is in the negative potential relative to ground, diode D2 forward conduction, resistance R15 and resistance R9 partial pressure form triode Q1's base bias value, and the voltage satisfies the turn-on voltage of triode Q1's base for triode Q1 saturation switches on, makes the grid of MOS nest of tubes and source voltage be in same electric potential, drives MOS nest of tubes quick the closing, guarantees the normal operating of battery.
Based on the utility model discloses in another embodiment of the circuit that negative pressure was handled is realized through control MOS nest of tubes to above-mentioned BMS system, triode Q1's opening voltage is greater than 0.4 volt.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model discloses a BMS system can eliminate the influence that the too big produced self-inductance's of current change electromotive force produced when taking place the battery short circuit when the circuit that negative pressure was handled is organized to control MOS pipe, guarantees that the MOS pipe can normally close, avoids the MOS pipe to close when negative voltage influences the downwardly extending, damages the MOS pipe, improves battery product quality, guarantee product safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of an embodiment of a circuit for implementing negative pressure treatment by controlling a MOS tube set in a BMS system of the present invention;
fig. 2 is a circuit diagram of another embodiment of the circuit for implementing negative pressure treatment by controlling the MOS tube set in the BMS system according to the present invention.
In the figure, 1BMS system chip, 2MOS tube group, 3 negative pressure processing circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below 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.
The circuit of the BMS system for performing negative pressure processing by controlling the MOS tube set according to the present invention will be described in more detail with reference to the accompanying drawings and embodiments.
Fig. 1 is a circuit diagram of an embodiment of a circuit for implementing negative pressure treatment by controlling a MOS tube group in a BMS system of the present invention, and as shown in fig. 1, the circuit for implementing negative pressure treatment by controlling a MOS tube group in a BMS system of the embodiment includes:
the system comprises a BMS system chip 1, an MOS tube group 2 and a negative pressure processing circuit 3;
the BMS system chip 1 is connected with the negative pressure processing circuit 3 through the MOS tube group 2;
when the battery system works normally, the BMS system chip 1 detects that the battery circuit is normal, the discharge MOS tube in the MOS tube group 2 is opened, the negative pressure processing circuit 3 is in a cut-off state, and the negative pressure processing circuit 3 does not work;
when the short circuit takes place for battery system, BMS system chip 1 detects the battery circuit short circuit, MOS nest of tubes 2 carries out the shutoff action, because the battery short circuit produces the electric current grow to electromotive force grow makes MOS nest of tubes 2 lasts to open, and MOS nest of tubes 2 time delay is closed, negative pressure processing circuit 3 work makes MOS nest of tubes 2 normally close, guarantees the battery normal operating.
Fig. 2 is a circuit diagram of another embodiment of the circuit of the BMS system for implementing negative pressure processing by controlling the MOS tube set, as shown in fig. 2, the negative pressure processing circuit 3 includes:
the transistor Q1, the diode D2, the resistor R9 and the resistor R15;
the base electrode of the triode Q1 is connected with the diode D2 and the resistor R9;
the collector of the triode Q1 is connected with the BMS system chip 1;
the emitting electrode of the triode Q1 is connected with a battery P +;
the other end of the diode D2 is grounded through the resistor R15;
a PACKDIV pin of the BMS system chip 1 is connected with a battery cathode;
when the battery system works normally, the BMS system chip 1 detects that the battery circuit is normal, the discharge MOS tube in the MOS tube group 2 is opened, the triode Q1 is in a cut-off state, and the negative pressure processing circuit 3 does not work;
when the battery system takes place the short circuit, BMS system chip 1 detects the battery circuit short circuit, MOS nest of tubes 2 carries out the turn-off action, produces the electric current grow because the battery short circuit to the electromotive force grow, makes MOS nest of tubes 2 lasts to be opened, and MOS nest of tubes 2 time delay is closed, works as battery P + is in the negative potential for ground, diode D2 forward conduction, resistance R15 and resistance R9 partial pressure form triode Q1's base bias value, and the voltage satisfies the turn-on voltage of triode Q1's base for triode Q1 saturation switches on, makes MOS nest of tubes 2's grid and source voltage be in same electric potential, drives MOS nest of tubes 2 fast closes, guarantees the normal operating of battery.
When short circuit occurs, the electromotive force generated by self-induction due to current change is expressed by formula
The circuit for controlling the MOS tube group to realize negative pressure treatment in the BMS system provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained herein by applying specific embodiments, and the description of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (3)
1. A BMS system realizes circuit of negative pressure processing through controlling MOS nest of tubes, its characterized in that includes:
BMS system chip, MOS nest of tubes, negative pressure treatment circuit;
the BMS system chip is connected with the negative pressure processing circuit through the MOS tube group;
when the battery system works normally, the BMS system chip detects that the battery circuit is normal, the discharge MOS tube in the MOS tube group is opened, the negative pressure processing circuit is in a cut-off state, and the negative pressure processing circuit does not work;
when the short circuit takes place for battery system, BMS system chip detects the battery circuit short circuit, MOS nest of tubes carries out the turn-off action, because battery short circuit produces the electric current grow to electromotive force grow makes MOS nest of tubes lasts to open, and MOS nest of tubes time delay is closed, negative pressure treatment circuit work makes MOS nest of tubes normally closes, guarantees the battery normal operating.
2. The BMS system of claim 1, wherein the negative voltage processing circuit comprises:
the transistor Q1, the diode D2, the resistor R9 and the resistor R15;
the base electrode of the triode Q1 is connected with the diode D2 and the resistor R9;
the collector of the triode Q1 is connected with the BMS system chip;
the emitting electrode of the triode Q1 is connected with a battery P +;
the other end of the diode D2 is grounded through the resistor R15;
a PACKDIV pin of the BMS system chip is connected with a battery cathode;
when the battery system works normally, the BMS system chip detects that the battery circuit is normal, the discharge MOS tube in the MOS tube group is opened, the triode Q1 is in a cut-off state, and the negative pressure processing circuit does not work;
when the battery system takes place the short circuit, BMS system chip detects the battery circuit short circuit, MOS nest of tubes carries out the turn-off action, produces the electric current grow because the battery short circuit to the electromotive force grow, makes MOS nest of tubes lasts to open, and MOS nest of tubes time delay is closed, works as battery P + is in the negative potential relative to ground, diode D2 forward conduction, resistance R15 and resistance R9 partial pressure form triode Q1's base bias value, and the voltage satisfies the turn-on voltage of triode Q1's base for triode Q1 saturation switches on, makes the grid of MOS nest of tubes and source voltage be in same electric potential, drives MOS nest of tubes quick the closing, guarantees the normal operating of battery.
3. The BMS system according to claim 2, wherein the turn-on voltage of the transistor Q1 is greater than 0.4V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021362642.3U CN213072136U (en) | 2020-07-13 | 2020-07-13 | Circuit for realizing negative pressure treatment of BMS system through controlling MOS pipe group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021362642.3U CN213072136U (en) | 2020-07-13 | 2020-07-13 | Circuit for realizing negative pressure treatment of BMS system through controlling MOS pipe group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213072136U true CN213072136U (en) | 2021-04-27 |
Family
ID=75572402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021362642.3U Active CN213072136U (en) | 2020-07-13 | 2020-07-13 | Circuit for realizing negative pressure treatment of BMS system through controlling MOS pipe group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213072136U (en) |
-
2020
- 2020-07-13 CN CN202021362642.3U patent/CN213072136U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104079276B (en) | High-efficiency intelligent high-side electronic load switch with wide voltage adaptability | |
| CN104410038A (en) | Overvoltage protection circuit for discharge regulating circuit | |
| CN205178887U (en) | Power supply circuit with L6599 controller | |
| CN213072136U (en) | Circuit for realizing negative pressure treatment of BMS system through controlling MOS pipe group | |
| CN210074864U (en) | Power supply switching circuit of solar commercial power complementary controller | |
| CN107895992A (en) | A kind of solar storage battery charge-discharge monitoring system | |
| CN216959423U (en) | Adjustable voltage output switching circuit with interlocking function | |
| CN110971175A (en) | Strong-current electrifying circuit, control method and servo driver | |
| CN207651425U (en) | A kind of relay drive circuit with delay function | |
| CN206546404U (en) | A kind of level pressure power amplifier short-circuit detecting circuit based on comparator | |
| CN206545724U (en) | A kind of flow instrument valve controling circuit | |
| CN215528681U (en) | Photovoltaic cell charge-discharge control circuit and device based on remote monitoring | |
| CN101587739A (en) | Audio play device | |
| CN203722307U (en) | Charge and discharge anti-reversal connection circuit using multi-cell cascading | |
| CN104682676A (en) | IGBT (Insulated Gate Bipolar Translator) driving protection circuit | |
| CN212305282U (en) | IGBT over-current protection circuit and device | |
| CN204271621U (en) | A kind of reversal connection of battery recharger port and short-circuit protection | |
| CN209981108U (en) | Relay drive circuit with state maintaining function | |
| CN203933064U (en) | The rechargeable solar charging electric control circuit of a kind of counnter attack | |
| CN207272384U (en) | A kind of control system of dipulse wire feeding motor | |
| CN201854202U (en) | High-power MOS (metal oxide semiconductor) transistor driving device of electric bicycle controller | |
| CN106678412A (en) | Valve control circuit for flow instrument and control method of valve control circuit | |
| CN206697983U (en) | Charge-discharge control circuit | |
| CN108075757A (en) | A kind of drive control circuit of high-power gto | |
| CN214281000U (en) | Automatic on-off driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |