CN220754396U - Dual-activation circuit of lithium battery BMS - Google Patents
Dual-activation circuit of lithium battery BMS Download PDFInfo
- Publication number
- CN220754396U CN220754396U CN202322423208.1U CN202322423208U CN220754396U CN 220754396 U CN220754396 U CN 220754396U CN 202322423208 U CN202322423208 U CN 202322423208U CN 220754396 U CN220754396 U CN 220754396U
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- Prior art keywords
- electrically connected
- mos tube
- mos transistor
- lithium battery
- grounded
- Prior art date
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 31
- 230000004913 activation Effects 0.000 claims abstract description 35
- 230000009977 dual effect Effects 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims 3
- 230000003213 activating effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a dual activation circuit of a lithium battery BMS, which comprises: MOS tube Q1, MOS tube Q2 and switch S1; the grid electrode of the MOS tube Q1 is electrically connected with a power supply DC_IN through at least one resistor, the source electrode of the MOS tube Q1 is grounded, and the drain electrode of the MOS tube Q2 is electrically connected with the drain electrode of the MOS tube Q2 and an activation enabling pin W_EN of the BMS system MCU respectively; the grid electrode of the MOS tube Q2 is electrically connected with the switch S1 through at least one resistor, the source electrode of the MOS tube Q2 is grounded, and the drain electrode of the MOS tube Q1 is electrically connected with the drain electrode of the MOS tube Q1 and the activation enabling pin W_EN of the BMS system MCU respectively; one end of the switch S1 is electrically connected with the power supply VCC, and the other end of the switch S is electrically connected with the grid electrode of the MOS tube Q2 through at least one resistor. The utility model activates the lithium battery BMS system by two modes of switching and inserting the charger, and sets the two activation modes as a relation of OR by hardware logic, thereby having low cost and strong anti-interference capability.
Description
Technical Field
The utility model particularly relates to a dual-activation circuit of a lithium battery BMS.
Background
In a lithium battery management system, standby power consumption is an important component, and a low-power standby mode can enable a lithium battery pack to have longer storage time and good user experience, and meanwhile, the cycle times of the battery can be reduced in the effective time, and the service life of the lithium battery is prolonged. When the lithium battery is needed to be used, the enabling circuit is used for activating the lithium battery BMS system to enter a normal working state, and when the lithium battery is not needed to be used, the lithium battery BMS system enters a low-power consumption standby mode.
At present, the traditional enabling and activating circuit is enabled by charging through an access charger, and the activating mode is monotonous and limited to be realized only by being nearby a power supply, so that the user experience is poor.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a dual activation circuit of a lithium battery BMS.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model discloses a dual activation circuit of a lithium battery BMS, which comprises: MOS tube Q1, MOS tube Q2 and switch S1;
the grid electrode of the MOS tube Q1 is electrically connected with a power supply DC_IN through at least one resistor, the source electrode of the MOS tube Q1 is grounded, and the drain electrode of the MOS tube Q2 is electrically connected with the drain electrode of the MOS tube Q2 and an activation enabling pin W_EN of the BMS system MCU respectively;
the grid electrode of the MOS tube Q2 is electrically connected with the switch S1 through at least one resistor, the source electrode of the MOS tube Q2 is grounded, and the drain electrode of the MOS tube Q1 is electrically connected with the drain electrode of the MOS tube Q1 and the activation enabling pin W_EN of the BMS system MCU respectively;
one end of the switch S1 is electrically connected with the power supply VCC, and the other end of the switch S is electrically connected with the grid electrode of the MOS tube Q2 through at least one resistor.
On the basis of the technical scheme, the following improvement can be made:
preferably, the other end of the switch S1 is electrically connected to the gate of the MOS transistor Q2 through a diode D1, the anode of the diode D1 is electrically connected to the switch S1, and the cathode of the diode D1 is electrically connected to the gate of the MOS transistor Q2.
Preferably, the other end of the switch S1 is electrically connected to the gate of the MOS transistor Q2 through at least one resistor, and at least one capacitor is connected in parallel to two ends of one or more resistors.
As a preferred solution, the drain of the MOS transistor Q1 is electrically connected to the drain of the MOS transistor Q2 through the diode D2, the anode of the diode D2 is electrically connected to the drain of the MOS transistor Q2, and the cathode thereof is electrically connected to the drain of the MOS transistor Q1.
As a preferred scheme, the drain electrode of the MOS transistor Q2 is electrically connected to the activation enable pin w_en of the BMS system MCU through at least one resistor.
As a preferable scheme, the grid electrode of the MOS transistor Q1 is grounded through the zener diode ZD1, the anode of the zener diode ZD1 is grounded, and the cathode of the zener diode ZD1 is electrically connected with the grid electrode of the MOS transistor Q1;
the gate of the MOS transistor Q2 is grounded through the zener diode ZD2, the anode of the zener diode ZD2 is grounded, and the cathode of the zener diode ZD2 is electrically connected with the gate of the MOS transistor Q2.
As a preferable scheme, the gate of the MOS transistor Q1 is grounded through the capacitor C1, and the gate of the MOS transistor Q2 is grounded through the capacitor C2.
As a preferred scheme, the gate of the MOS transistor Q1 is grounded through at least one resistor.
As a preferred scheme, the gate of the MOS transistor Q2 is grounded through at least one resistor.
The lithium battery BMS dual-activation circuit has the following beneficial effects:
first, the lithium battery BMS system is activated by both a switch and an insertion charger, and the two activation modes are set to or relationship by hardware logic.
Secondly, the two activation modes can activate the circuit only by one effective mode, so that the man-machine input is simple and quick, and meanwhile, the software logic is simplified.
Third, the circuit has the characteristics of low construction cost and strong anti-interference capability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit diagram of a dual activation circuit of a lithium battery BMS according to an embodiment of the present utility model.
Detailed Description
Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The expression "comprising" an element is an "open" expression which merely means that the corresponding component is present and should not be interpreted as excluding additional components.
To achieve the object of the present utility model, in some embodiments of a dual activation circuit of a lithium battery BMS, as shown in fig. 1, the dual activation circuit of the lithium battery BMS includes: MOS transistor Q1, MOS transistor Q2, and switch S1.
The grid electrode of the MOS tube Q1 is electrically connected with a power supply DC_IN through a resistor R1, the source electrode of the MOS tube Q1 is grounded, the drain electrode of the MOS tube Q2 is electrically connected with the drain electrode of the MOS tube Q2 through a diode D2, and the drain electrode of the MOS tube Q1 is also electrically connected with an activation enabling pin W_EN of the BMS system MCU through a diode D2 and a resistor R6;
the anode of the diode D2 is electrically connected to the drain of the MOS transistor Q2, and the cathode thereof is electrically connected to the drain of the MOS transistor Q1.
The grid electrode of the MOS tube Q2 is electrically connected with the switch S1 through a resistor R4, a resistor R5 and a diode D1 in sequence, the source electrode of the MOS tube Q is grounded, and the drain electrode of the MOS tube Q is electrically connected with an activation enabling pin W_EN of the BMS system MCU through a resistor R6;
the anode of the diode D1 is electrically connected with the switch S1, and the cathode of the diode D is electrically connected with one end of the resistor R5;
the capacitor C3 is connected in parallel with the two ends of the resistor R5.
One end of the switch S1 is electrically connected to the power source VCC, and is electrically connected to the gate of the MOS transistor Q2 sequentially through the diode D1, the resistor R5, and the resistor R4.
The switch S1 is a key switch.
Further, the grid electrode of the MOS tube Q1 is grounded through the zener diode ZD1, the anode of the zener diode ZD1 is grounded, and the cathode of the zener diode ZD1 is electrically connected with the grid electrode of the MOS tube Q1;
the gate of the MOS transistor Q2 is grounded through the zener diode ZD2, the anode of the zener diode ZD2 is grounded, and the cathode of the zener diode ZD2 is electrically connected with the gate of the MOS transistor Q2.
Further, the gate of the MOS transistor Q1 is grounded through a capacitor C1, and the gate of the MOS transistor Q2 is grounded through a capacitor C2.
Further, the grid electrode of the MOS tube Q1 is grounded through a resistor R2; the grid electrode of the MOS tube Q2 is grounded through a resistor R3.
The circuit is in an enabled state when the enabled pin W_EN of the BMS system MCU is in a low level, and is in a standby low power consumption state when the enabled pin W_EN is in a high level or in an open state.
When the push switch S1 is pushed, an activation enable signal is inputted to the BMS system.
The capacitor C3 is an acceleration capacitor, and can rapidly provide a high-level signal for the grid electrode of the MOS tube Q2, so that the conduction time is accelerated.
The zener diode ZD1 and the zener diode ZD2 can prevent the surge voltage from damaging the gates of the MOS transistor Q1 and the MOS transistor Q2.
Diode D1 and diode D2 act as a level isolation.
The working flow of the utility model is as follows:
when the charger is not connected, the grid electrode of the MOS tube Q1 is pulled down to be at a low level by the resistor R2, the MOS tube Q1 is in a cut-off state, and the current state of the MOS tube Q1 does not act on the BMS system through level isolation of the diode D2;
at this time, when the S1 is in an off state, the grid electrode of the MOS transistor Q2 is pulled down to be in a low level by the resistor R3, and the MOS transistor Q2 is in an off state;
the enabling end W_EN is in a suspended state, and the BMS system enters a standby low-power consumption state;
when the switch S1 is closed, the gate of the MOS transistor Q2 is at a high level after being divided by the resistor R3 and the resistor R4, the MOS transistor Q2 is in a conducting state, the voltage of the activation enable pin w_en is pulled down to a low level by the resistor R6 and the MOS transistor Q2, and at this time, the BMS system enters an activation enable state.
When the charger is connected, after the voltage is divided by the resistor R1 and the resistor R2, the grid electrode of the MOS tube Q1 is at a high level, the MOS tube Q1 is in a conducting state, the cathode of the diode D2 is at a low level, the activation enabling pin W_EN is pulled down to be at a low level through the resistor R6 and the diode D2, at the moment, no matter the switch S1 is closed or opened, the W_EN voltage is at a low level, and the BMS system enters an activation enabling state.
The utility model enables a user to activate the BMS circuit for use when the lithium battery is discharged or charged, and when the BMS circuit is not used, the BMS is dormant and standby, and enters a low-power consumption state, so that the use mode is optimized, the standby time and the use time are prolonged, the power consumption is reduced, the man-machine input is simple and quick, and meanwhile, the software logic is simplified.
It should be noted that the MOS transistors Q1 and Q2 may be, but not limited to, N-channel MOS transistors, and NPN transistors.
The diode D1 and the diode D2 may be, but are not limited to, schottky diodes.
The lithium battery BMS dual-activation circuit has the following beneficial effects:
first, the lithium battery BMS system is activated by both a switch and an insertion charger, and the two activation modes are set to or relationship by hardware logic.
Secondly, the two activation modes can activate the circuit only by one effective mode, so that the man-machine input is simple and quick, and meanwhile, the software logic is simplified.
Third, the circuit has the characteristics of low construction cost and strong anti-interference capability.
The utility model can be applied to electronic products powered (charged) by a power supply, such as: various consumer electronics, digital products, and the like.
While the basic principles and main features of the present utility model and advantages of the present utility model have been shown and described, it will be understood by those skilled in the art that the present utility model is not limited by the foregoing embodiments, which are described in the foregoing specification merely illustrate the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined in the appended claims and their equivalents.
Claims (9)
1. Lithium battery BMS dual activation circuit, its characterized in that includes: MOS tube Q1, MOS tube Q2 and switch S1;
the grid electrode of the MOS tube Q1 is electrically connected with a power supply DC_IN through at least one resistor, the source electrode of the MOS tube Q1 is grounded, and the drain electrode of the MOS tube Q2 is electrically connected with the drain electrode of the MOS tube Q2 and an activation enabling pin W_EN of the BMS system MCU respectively;
the grid electrode of the MOS tube Q2 is electrically connected with the switch S1 through at least one resistor, the source electrode of the MOS tube Q2 is grounded, and the drain electrode of the MOS tube Q1 is electrically connected with the drain electrode of the MOS tube Q1 and the activation enabling pin W_EN of the BMS system MCU respectively;
one end of the switch S1 is electrically connected with the power supply VCC, and the other end of the switch S is electrically connected with the grid electrode of the MOS tube Q2 through at least one resistor.
2. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the other end of the switch S1 is electrically connected to the gate of the MOS transistor Q2 through a diode D1, the anode of the diode D1 is electrically connected to the switch S1, and the cathode of the diode D is electrically connected to the gate of the MOS transistor Q2.
3. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the other end of the switch S1 is electrically connected to the gate of the MOS transistor Q2 through at least one resistor, and at least one capacitor is connected in parallel to both ends of one or more resistors.
4. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the drain of the MOS transistor Q1 is electrically connected to the drain of the MOS transistor Q2 through a diode D2, and the anode of the diode D2 is electrically connected to the drain of the MOS transistor Q2, and the cathode thereof is electrically connected to the drain of the MOS transistor Q1.
5. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the drain of the MOS transistor Q2 is electrically connected to an activation enable pin w_en of the BMS system MCU through at least one resistor.
6. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the grid electrode of the MOS transistor Q1 is grounded through a zener diode ZD1, the anode of the zener diode ZD1 is grounded, and the cathode of the zener diode ZD1 is electrically connected with the grid electrode of the MOS transistor Q1;
the grid electrode of the MOS tube Q2 is grounded through a voltage stabilizing diode ZD2, the anode of the voltage stabilizing diode ZD2 is grounded, and the cathode of the voltage stabilizing diode ZD2 is electrically connected with the grid electrode of the MOS tube Q2.
7. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the gate of the MOS transistor Q1 is grounded through a capacitor C1, and the gate of the MOS transistor Q2 is grounded through a capacitor C2.
8. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the gate of the MOS transistor Q1 is grounded through at least one resistor.
9. The dual activation circuit of a lithium battery BMS according to claim 1, wherein the gate of the MOS transistor Q2 is grounded through at least one resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322423208.1U CN220754396U (en) | 2023-09-07 | 2023-09-07 | Dual-activation circuit of lithium battery BMS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322423208.1U CN220754396U (en) | 2023-09-07 | 2023-09-07 | Dual-activation circuit of lithium battery BMS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220754396U true CN220754396U (en) | 2024-04-09 |
Family
ID=90570124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322423208.1U Active CN220754396U (en) | 2023-09-07 | 2023-09-07 | Dual-activation circuit of lithium battery BMS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220754396U (en) |
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2023
- 2023-09-07 CN CN202322423208.1U patent/CN220754396U/en active Active
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