CN211456745U - Low pressure BMS dormancy and awaken power supply control device up - Google Patents
Low pressure BMS dormancy and awaken power supply control device up Download PDFInfo
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- CN211456745U CN211456745U CN202020208651.0U CN202020208651U CN211456745U CN 211456745 U CN211456745 U CN 211456745U CN 202020208651 U CN202020208651 U CN 202020208651U CN 211456745 U CN211456745 U CN 211456745U
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Abstract
The utility model belongs to the technical field of the battery management system technique and specifically relates to indicate a low pressure BMS dormancy and awaken power supply control device up, it includes switch member, first step-down module, second step-down module, time delay turn-off module, linear step-down module LDO, power switching module, external voltage detection module and microcontroller MCU. The utility model has novel structure, adopts a dual power supply mode, and simultaneously supports an external power supply mode, thereby realizing the low power consumption dormancy function of the BMS; an external power supply awakening mode is adopted, and the charging can be awakened normally under the condition that the lowest working voltage of the BMS auxiliary power supply is lower than the lowest working voltage; the utility model solves the problem of overdischarge caused by long-term storage of the battery pack in a reliable and low-cost way; even if the battery pack is over-discharged, the battery pack can be awakened and charged normally under the condition that the case is not detached, so that the maintenance cost of the battery pack is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of the battery management system technique and specifically relates to indicate a low pressure BMS dormancy and awaken power supply control device up.
Background
The battery management system BMS is a key component of the battery energy storage system, and its power-taking mode can be taken from the battery pack, and also from an external power supply, such as the utility power. To leaving net, half from net system application occasion, BMS normal work can't be guaranteed to external power source's unstability, therefore BMS is usually followed the group battery and is got the electricity, can satisfy independent operation demand.
The energy of group battery itself is limited, and the BMS will get the electricity from the group battery, must satisfy the low-power consumption of normal operating, still must possess dormancy and awaken the functional requirement. Therefore, the battery pack can be prevented from being over-discharged, and the battery pack can be successfully awakened and charged from a dormant state. BMS low-power consumption and dormancy schemes of most manufacturers at present can be classified into three types, wherein the first type adopts double power supplies for power supply, a main power supply obtains electricity from a battery pack and reduces the voltage of the electricity to a rear-stage circuit, and a dormancy and awakening power supply obtains electricity from the 2 nd or 3 rd serial positive electrode of the negative electrode side of the battery pack; the defect is that the unbalance of the capacity of the battery cell can be caused when the power branch circuit is in dormancy for a long time or in dormancy and awakening, and the available electric quantity of the battery pack can be reduced. The second type also adopts dual power supply, and main power, dormancy and awakening power all get the electricity from the group battery and step down for the back level circuit, but BMS and battery group assembly back, BMS gets the electricity from the group battery all the time, and external control ship type switch can't cut off the power supply loop, shelves for a long time or can lead to the group battery overdischarge under the condition of group battery low-power. The third type is that the BMS gets electricity from external power supply, and the BMS does not consume the electric quantity of group battery, and this mode is not fit for the condition of not having external power supply. In addition, most manufacturers cannot wake up the battery pack directly without detaching the case under the condition that the voltage of the battery pack is lower than the minimum working voltage of the BMS auxiliary power supply, which also increases the maintenance cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low-voltage BMS dormancy and wake-up power supply control device aiming at the problems of the prior art, which has novel structure and solves the problem of overdischarge caused by long-term storage of a battery pack in a reliable and low-cost way; even if the battery pack is over-discharged, the battery pack can be awakened and charged normally under the condition that the case is not detached, so that the maintenance cost of the battery pack is greatly reduced.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a low voltage BMS dormancy and wake-up power supply control device, which comprises a switch, a first voltage reduction module, a second voltage reduction module, a delay turn-off module, a linear voltage reduction module LDO, a power supply switching module, an external voltage detection module and a microcontroller MCU; the external battery pack is connected with the input end of the second voltage reduction module through the input end of the first voltage reduction module and the input end of the second voltage reduction module through the switch component, the output end of the second voltage reduction module is connected with the input end of the delay turn-off module and the input end of the power switching module, the input end of the microcontroller MCU is connected with the output end of the power switching module and the output end of the external voltage detection module, the output end of the microcontroller MCU is connected with the input end of the first voltage reduction module, the input end of the linear voltage reduction module LDO is connected with the output end of the first voltage reduction module, and the output end of the linear voltage reduction module LDO is connected with the input end of the.
The time delay turn-off module comprises a diode D1, a triode Q2 and a diode D2, the anode of the diode D1 is connected with the output end of the second voltage reduction module, the cathode of the diode D1 and the cathode of the diode D2 are respectively connected with the base of a triode Q2, the anode of the diode D2 is connected with the output end of the microcontroller MCU, the collector of the triode Q2 is connected with the input end of the first voltage reduction module, and the emitter of the triode Q2 is grounded.
The time-delay turn-off module further comprises a resistor R1, a capacitor C1, a zener diode ZD1, a resistor R3, a resistor R2, a resistor R4, a transistor Q1, a resistor R5 and a resistor R6, an output end of the second buck module is respectively connected with one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R1 is connected with one end of the resistor R1 through the zener diode ZD1, the other end of the resistor R1 is also grounded through the capacitor C1, the other end of the resistor R1 is respectively connected with one end of the resistor R1 and a base of the transistor Q1, the other end of the resistor R1 is grounded, a collector of the transistor Q1 and the other end of the resistor R1 are both connected with an anode of a diode D1, an emitter of the transistor Q1 is grounded, a cathode of the diode D1 is connected with one end of the resistor R1, and the base of the diode Q1 are respectively connected with the other end of the resistor R1, the other end of the resistor R6 is grounded.
Wherein the LDO module comprises a diode D3, a diode D4, a bidirectional TVS1, a capacitor C2, a linear buck chip U1 and a capacitor C3, an anode of the diode D3 is connected to an output terminal of the first voltage dropping module, a cathode of the diode D3 and a cathode of the diode D4 are both connected to one end of the bidirectional TVS tube TVS1, the anode of the diode D4 is used for being externally connected with an external 12V power supply, the cathode of the diode D3, one end of the capacitor C2 and the cathode of the diode D4 are all connected with the input pin of the linear voltage reduction chip U1, the other end of the bidirectional TVS transistor TVS1, the other end of the capacitor C2 and the ground pin of the linear buck chip U1 are all grounded, the output pin of the linear buck chip U1 outputs 3.3V power, one end of the capacitor C3 is connected with the output pin of the linear buck chip U1, and the other end of the capacitor C3 is grounded.
Wherein the power switching module comprises a resistor R7, a resistor R8, a MOS transistor Q3, a MOS transistor Q4, a resistor R9, a MOS transistor Q5, a capacitor C4 and a diode D5, one end of the resistor R7 is connected with a 12.5V power supply, the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the grid electrode of the MOS transistor Q3, the other end of the resistor R8 and the source of the MOS transistor Q3 are both grounded, the drain of the MOS transistor Q3 is respectively connected with the gate of the MOS transistor Q4, one end of the resistor R9 and the base of the MOS transistor Q5, the source of the MOS transistor Q4 is connected with the output end of the LDO, the drain of the MOS transistor Q4 is connected with the other end of the resistor R9 and the drain of the MOS transistor Q5, the source of the MOS transistor Q5, the cathode of the diode D5 and one end of the capacitor C4 are all connected with a power supply VDD, the other end of the capacitor C4 is grounded, and the anode of the diode D5 is connected with the output end of the second voltage reduction module.
The external voltage detection module comprises a resistor R10, a resistor R11, a diode D6, a triode Q6, a diode D7, a resistor R12, a resistor R13, a triode Q7, a resistor R14, a resistor R15 and a capacitor C5, wherein one end of the resistor R10 is connected with a 3V power supply, the other end of the resistor R10 is respectively connected with one end of a resistor R11 and the base of the triode Q6, the other end of the resistor R11 is connected with the anode of the diode D6, and the cathode of the diode D6 is grounded; an emitter of the triode Q6 is connected with an anode of the diode D7, a cathode of the diode D7 is connected with a negative electrode of an external charger, a collector of the triode Q6 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with a base of the triode Q7 and one end of the resistor R13 respectively, the other end of the resistor R13 and an emitter of the triode Q7 are both connected with a 3V power supply, a collector of the triode Q7 is connected with one end of the resistor R14 and one end of the resistor R15 respectively, the other end of the resistor R14 is grounded, the other end of the resistor R15 is connected with one end of the capacitor C5 and an input end of the microcontroller MCU, and the other end of the capacitor C5 is.
Wherein, the switch piece is a ship-shaped switch K1.
The utility model has the advantages that:
the utility model has novel structure, adopts a dual power supply mode, and simultaneously supports an external power supply mode, thereby realizing the low power consumption dormancy function of the BMS; an external power supply awakening mode is adopted, and the charging can be awakened normally under the condition that the lowest working voltage of the BMS auxiliary power supply is lower than the lowest working voltage; the utility model solves the problem of overdischarge caused by long-term storage of the battery pack in a reliable and low-cost manner under the action of a switch element, a first voltage reduction module, a second voltage reduction module, a time delay turn-off module, a linear voltage reduction module LDO, a power supply switching module, an external voltage detection module and a microcontroller MCU; even if the battery pack is over-discharged, the battery pack can be awakened and charged normally under the condition that the case is not detached, so that the maintenance cost of the battery pack is greatly reduced.
Drawings
Fig. 1 is the utility model discloses a low pressure BMS dormancy and awaken power control unit's principle frame schematic diagram.
Fig. 2 is a circuit structure diagram of the delay turn-off module of the present invention.
Fig. 3 is a circuit diagram of the linear buck module LDO of the present invention.
Fig. 4 is a circuit structure diagram of the power switching module of the present invention.
Fig. 5 is a circuit structure diagram of the external voltage detection module of the present invention.
The reference numerals in fig. 1 to 5 include:
1-first voltage reduction module 2-second voltage reduction module 3-time delay turn-off module
4-linear voltage reduction module LDO 5-power switching module 6-external voltage detection module
7-microcontroller MCU.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.
A low-voltage BMS sleep and wake-up power control device, as shown in fig. 1 to 5, includes a switching element, a first step-down module 1, a second step-down module 2, a delay turn-off module 3, a linear step-down module LDO4, a power switching module 5, an external voltage detection module 6, and a microcontroller MCU 7;
external battery passes through the switch part and is connected with second buck module 2's input first buck module 1's input respectively, second buck module 2's output respectively with the input of time delay turn-off module 3 and the input of power switching module 5, microcontroller MCU 7's input respectively with the output of power switching module 5 and the output of external voltage detection module 6 is connected, microcontroller MCU 7's output is connected with first buck module 1's input, linear buck module LDO 4's input with first buck module 1's output is connected, linear buck module LDO 4's output with power switching module 5's input is connected, external input power supply is connected to linear buck module LDO 4's input.
Specifically, the utility model discloses novel structure, design benefit uses the dormancy and the awakening power supply seamless switching of power switching module 5 realization main power supply, when guaranteeing to switch, and microcontroller MCU7 can not reset, can get into the dormant state smoothly, and normal during operation, and microcontroller MCU7 is by main power supply, awakens the mains operated power supply by the dormancy during the dormancy, has promoted the utility model discloses a BMS reliability. Wherein, turn-off module 3 through the time delay, solved the utility model discloses a BMS opens the main power supply when last, later maintains the main power supply by microcontroller MCU7 and opens, and the switching part can cut off BMS's power supply promptly, and BMS is also power consumptive under the long-term condition of shelving, has reduced group battery overdischarge risk, and external voltage detection module 6 that uses has avoided external voltage to be less than the condition that BMS also can awaken up to the group battery voltage, has stopped the unexpected risk that arouses up to BMS of outside low voltage and has leaded to the overdischarge.
In the low-voltage BMS sleep and wake-up power control apparatus according to this embodiment, the delay shutdown module 3 includes a diode D1, a transistor Q2 and a diode D2, an anode of the diode D1 is connected to the output terminal of the second voltage-reducing module 2, a cathode of the diode D1 and a cathode of the diode D2 are respectively connected to a base of the transistor Q2, an anode of the diode D2 is connected to the output terminal of the microcontroller MCU7, a collector of the transistor Q2 is connected to the input terminal of the first voltage-reducing module 1, and an emitter of the transistor Q2 is grounded;
further, the time-delay turn-off module 3 further includes a resistor R1, a capacitor C1, a zener diode ZD1, a resistor R3, a resistor R2, a resistor R4, a transistor Q1, a resistor R5, and a resistor R6, an output end of the second buck module 2 is respectively connected to one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R1 is connected to one end of the resistor R1 through the zener diode ZD1, the other end of the resistor R1 is further connected to ground through the capacitor C1, the other end of the resistor R1 is respectively connected to one end of the resistor R1 and a base of the transistor Q1, the other end of the resistor R1 is connected to ground, a collector of the transistor Q1 and the other end of the resistor R1 are both connected to an anode of the diode D1, an emitter of the transistor Q1 is connected to ground, a cathode of the diode D1 is connected to one end of the resistor R1 and a base of the diode Q1, the other end of the resistor R6 is grounded.
Specifically, 2 output 3V voltage supplies of second pressure reduction module turn-OFF module 3 for the time delay, the utility model discloses a back is opened to the switch member, 2 output 3V voltage supplies of second pressure reduction module turn-OFF module 3 for the time delay, produce a positive pulse signal at diode D1's positive pole, after the drive of triode Q2, draw down first pressure reduction module 1's control enable foot, thereby open first pressure reduction module 1, first pressure reduction module 1 begins to work has output voltage, the initialization ON/OFF foot is the high level in order to maintain first pressure reduction module 1 main power supply after little control unit works.
In the low-voltage BMS sleep and wake-up power control apparatus according to this embodiment, the linear buck module LDO4 includes a diode D3, a diode D4, a bidirectional TVS tube TVS1, a capacitor C2, a linear buck chip U1 and a capacitor C3, an anode of the diode D3 is connected to the output terminal of the first buck module 1, a cathode of the diode D3 and a cathode of the diode D4 are both connected to one end of the bidirectional TVS tube TVS1, an anode of the diode D4 is used for externally connecting to a 12V power supply, a cathode of the diode D3, one end of the capacitor C2 and a cathode of the diode D4 are all connected to the input pin of the linear buck chip U1, the other end of the bidirectional TVS tube TVS1, the other end of the capacitor C2 and the ground pin of the linear buck chip U1 are all grounded, the output pin of the linear buck chip U5 outputs 3.3V power, one end of the capacitor C3 is connected to the output pin of the linear buck chip U1, the other end of the capacitor C3 is grounded.
Specifically, after the first buck module 1 works normally, a 12.5V power supply is generated and sent to the linear buck module LDO4, the LDO generates a 3.3V power supply and outputs the power supply to the power conversion module, the linear buck module LDO4 can also receive an external 12V power supply input, the diode D3 and the diode D4 are used for clamping and preventing the two power supplies from communicating with each other, and the bidirectional TVS tube TVS1 is used for protecting the linear buck chip U1 and preventing the power supply from being damaged due to overvoltage of the external 12V input power supply; the linear buck chip U1 may be the linear buck chip in the prior art, and is not limited herein.
The purpose of adding an external 12V input power supply is as follows: when the extremely low electric quantity of group battery, the group battery is always pressed and is less than the minimum operating voltage of first step-down module 1, and the main power supply can't work promptly, and charge and discharge MOS pipe also can't switch on, when not taking apart quick-witted case, in case there is the access of outside 12V power, and linear step-down module LDO4 also can normally work, and microcontroller MCU7 gets electric, can normally open charge and discharge MOS pipe, the saving group battery that charges.
In the low-voltage BMS sleep and wake-up power control apparatus according to the present embodiment, the power switching module 5 includes a resistor R7, a resistor R8, a MOS transistor Q3, a MOS transistor Q4, a resistor R9, a MOS transistor Q5, a capacitor C4, and a diode D5, one end of the resistor R7 is connected with a 12.5V power supply, the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the grid electrode of the MOS transistor Q3, the other end of the resistor R8 and the source of the MOS transistor Q3 are both grounded, the drain of the MOS transistor Q3 is respectively connected with the gate of the MOS transistor Q4, one end of the resistor R9 and the base of the MOS transistor Q5, the source of the MOS transistor Q4 is connected with the output end of the linear buck module LDO4, the drain of the MOS transistor Q4 is connected with the other end of the resistor R9 and the drain of the MOS transistor Q5, the source of the MOS transistor Q5, the cathode of the diode D5 and one end of the capacitor C4 are all connected with a power supply VDD, the other end of the capacitor C4 is grounded, and the anode of the diode D5 is connected to the output end of the second buck module 2.
Specifically, the power switching module 5 is used to switch the main power supply 3.3V and the sleep wake-up power supply 3V. When the battery pack is normally operated, the BMS power supply of the utility model mainly comes from the main power supply of 3.3V, when the BMS detects that the battery pack reaches the dormancy condition, the ON/OFF pin of the microcontroller MCU7 outputs low level to close the first voltage reduction module 1, and the main power supply of 3.3V is also closed; at this point, the power supply 3V supplies power to the microcontroller MCU7 in the sleep low power state and to the external voltage detection circuit in preparation for wake-up. The MOS transistor Q4 and the MOS transistor Q5 are connected in series to avoid that in a dormant power supply state, 3V power is supplied to a circuit of a 3.3V power supply, and excessive power consumption is caused.
In the low-voltage BMS sleep and wake-up power control device according to the present embodiment, the external voltage detection module 6 includes a resistor R10, a resistor R11, a diode D6, a transistor Q6, a diode D7, a resistor R12, a resistor R13, a transistor Q7, a resistor R14, a resistor R15, and a capacitor C5, one end of the resistor R10 is connected to a 3V power supply, the other end of the resistor R10 is connected to one end of the resistor R11 and a base of the transistor Q6, the other end of the resistor R11 is connected to an anode of the diode D6, and a cathode of the diode D6 is grounded; an emitter of the triode Q6 is connected with an anode of the diode D7, a cathode of the diode D7 is connected with a negative electrode of an external charger, a collector of the triode Q6 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with a base of the triode Q7 and one end of the resistor R13 respectively, the other end of the resistor R13 and an emitter of the triode Q7 are both connected with a 3V power supply, a collector of the triode Q7 is connected with one end of the resistor R14 and one end of the resistor R15 respectively, the other end of the resistor R14 is grounded, the other end of the resistor R15 is connected with one end of the capacitor C5 and an input end of the microcontroller MCU7 respectively, and the other end of the capacitor C5.
Specifically, when the utility model discloses an external voltage detection module 6 detects when external voltage is greater than the voltage of group battery, just allows BMS to withdraw from the dormant state, and external voltage is less than battery voltage and also can awaken up the group battery otherwise, but the outside machine of charging can't charge again, will lead to the group battery to have the risk of putting excessively. Usually, the positive electrode of the battery pack matched with the low-voltage BMS is directly connected with the positive electrode of the charger, and the negative electrode of the battery pack is connected with the negative electrode P-of the external charger through an MOS (metal oxide semiconductor) tube in the power supply switching module 5. The external voltage detection module 6 detects that the external voltage is larger than the battery voltage based on the potential difference between GND and P-, and the purpose of the diode D6 and the diode D7 is to cut off the branch current of the main loop of the charge and discharge MOS tube. When the external voltage is greater than the battery pack voltage, the input pin of the microcontroller MCU7, i.e., the Wakeup pin of the microcontroller MCU7, may detect a high level, exiting the sleep state.
In the low voltage BMS sleep and wake-up power control apparatus according to this embodiment, the switch member is a ship switch K1.
The utility model discloses an effect lies in: use power switching module 5 to realize the dormancy of main power supply and awaken up the seamless switching of power, when guaranteeing to switch, microcontroller MCU7 can not reset, can get into the dormancy state smoothly, and normal during operation, and microcontroller MCU7 awakens up the mains operated power supply by the dormancy during dormancy, has promoted the utility model discloses a BMS reliability.
Wherein, turn-off module 3 through the time delay, solved the utility model discloses a BMS opens the main power supply when last, later maintains the main power supply by microcontroller MCU7 and opens, and the power supply that the BMS can be cut off to ship type switch K1 promptly, and BMS is also power consumptive under the long-term condition of shelving, has reduced the group battery and has overdischarged the risk.
Under the circumstances that battery pack voltage is less than BMS auxiliary power supply turn-on voltage, need not to take apart the battery pack machine case, can directly awaken up BMS and charge through outside 12V power interface, reduced the maintenance cost.
The external voltage detection module 6 that uses has avoided external voltage to be less than the circumstances that the BMS also can be awaken up to group battery voltage, has stopped the unexpected risk that arouses up BMS and lead to overdischarge of outside low-voltage.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.
Claims (7)
1. The utility model provides a low pressure BMS dormancy and awaken power supply control device which characterized in that: the circuit comprises a switch, a first voltage reduction module, a second voltage reduction module, a delay turn-off module, a linear voltage reduction module LDO (low dropout regulator), a power supply switching module, an external voltage detection module and a microcontroller MCU (microprogrammed control Unit);
the external battery pack is connected with the input end of the second voltage reduction module through the input end of the first voltage reduction module and the input end of the second voltage reduction module through the switch component, the output end of the second voltage reduction module is connected with the input end of the delay turn-off module and the input end of the power switching module, the input end of the microcontroller MCU is connected with the output end of the power switching module and the output end of the external voltage detection module, the output end of the microcontroller MCU is connected with the input end of the first voltage reduction module, the input end of the linear voltage reduction module LDO is connected with the output end of the first voltage reduction module, and the output end of the linear voltage reduction module LDO is connected with the input end of the.
2. The low-voltage BMS sleep and wake-up power control device of claim 1, characterized in that: the time-delay turn-off module comprises a diode D1, a triode Q2 and a diode D2, the anode of the diode D1 is connected with the output end of the second voltage reduction module, the cathode of the diode D1 and the cathode of the diode D2 are respectively connected with the base of a triode Q2, the anode of the diode D2 is connected with the output end of the microcontroller MCU, the collector of the triode Q2 is connected with the input end of the first voltage reduction module, and the emitter of the triode Q2 is grounded.
3. The low-voltage BMS sleep and wake-up power control device of claim 2, characterized in that: the time-delay turn-off module further comprises a resistor R1, a capacitor C1, a zener diode ZD1, a resistor R3, a resistor R2, a resistor R4, a transistor Q1, a resistor R5 and a resistor R6, wherein an output end of the second voltage reduction module is respectively connected with one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R1 is connected with one end of the resistor R1 through the zener diode ZD1, the other end of the resistor R1 is also grounded through the capacitor C1, the other end of the resistor R1 is respectively connected with one end of the resistor R1 and a base of the transistor Q1, the other end of the resistor R1 is grounded, a collector of the transistor Q1 and the other end of the resistor R1 are both connected with an anode of a diode D1, an emitter of the transistor Q1 is grounded, a cathode of the diode D1 is connected with one end of the resistor R1, and a base of the resistor Q1 are respectively connected with the other end of, the other end of the resistor R6 is grounded.
4. The low-voltage BMS sleep and wake-up power control device of claim 1, characterized in that: the linear buck module LDO comprises a diode D3, a diode D4, a bidirectional TVS1, a capacitor C2, a linear buck chip U1 and a capacitor C3, an anode of the diode D3 is connected to an output terminal of the first voltage dropping module, a cathode of the diode D3 and a cathode of the diode D4 are both connected to one end of the bidirectional TVS tube TVS1, the anode of the diode D4 is used for being externally connected with an external 12V power supply, the cathode of the diode D3, one end of the capacitor C2 and the cathode of the diode D4 are all connected with the input pin of the linear voltage reduction chip U1, the other end of the bidirectional TVS transistor TVS1, the other end of the capacitor C2 and the ground pin of the linear buck chip U1 are all grounded, the output pin of the linear buck chip U1 outputs 3.3V power, one end of the capacitor C3 is connected with the output pin of the linear buck chip U1, and the other end of the capacitor C3 is grounded.
5. The low-voltage BMS sleep and wake-up power control device of claim 1, characterized in that: the power supply switching module comprises a resistor R7, a resistor R8, a MOS tube Q3, a MOS tube Q4, a resistor R9, a MOS tube Q5, a capacitor C4 and a diode D5, wherein one end of the resistor R7 is connected with a 12.5V power supply, the other end of the resistor R7 is connected with one end of the resistor R8 and the grid of the MOS tube Q3 respectively, the other end of the resistor R8 and the source of the MOS tube Q3 are grounded, the drain of the MOS tube Q3 is connected with the grid of the MOS tube Q4, one end of the resistor R9 and the base of the MOS tube Q5 respectively, the source of the MOS tube Q4 is connected with the output end of the linear voltage reduction module, the drain of the MOS tube Q4 is connected with the other end of the resistor R9 and the drain of the MOS tube Q5, the source of the MOS tube Q5, the cathode of the diode D5 and one end of the capacitor C4 are connected with the other end of the LDO4, the other end of the LDO 39 5 is connected with the second voltage reduction module.
6. The low-voltage BMS sleep and wake-up power control device of claim 1, characterized in that: the external voltage detection module comprises a resistor R10, a resistor R11, a diode D6, a triode Q6, a diode D7, a resistor R12, a resistor R13, a triode Q7, a resistor R14, a resistor R15 and a capacitor C5, wherein one end of the resistor R10 is connected with a 3V power supply, the other end of the resistor R10 is respectively connected with one end of a resistor R11 and the base of the triode Q6, the other end of the resistor R11 is connected with the anode of the diode D6, and the cathode of the diode D6 is grounded; an emitter of the triode Q6 is connected with an anode of the diode D7, a cathode of the diode D7 is connected with a negative electrode of an external charger, a collector of the triode Q6 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with a base of the triode Q7 and one end of the resistor R13 respectively, the other end of the resistor R13 and an emitter of the triode Q7 are both connected with a 3V power supply, a collector of the triode Q7 is connected with one end of the resistor R14 and one end of the resistor R15 respectively, the other end of the resistor R14 is grounded, the other end of the resistor R15 is connected with one end of the capacitor C5 and an input end of the microcontroller MCU, and the other end of the capacitor C5 is.
7. The low-voltage BMS sleep and wake power control device of claim 1,
the method is characterized in that: the switch piece is a ship-shaped switch K1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327094A (en) * | 2020-02-25 | 2020-06-23 | 东莞市峰谷科技有限公司 | Low pressure BMS dormancy and awaken power supply control device up |
| CN114630204A (en) * | 2022-03-10 | 2022-06-14 | 成都中科慧源科技有限公司 | Low-power consumption thing networking instrument data acquisition system |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327094A (en) * | 2020-02-25 | 2020-06-23 | 东莞市峰谷科技有限公司 | Low pressure BMS dormancy and awaken power supply control device up |
| CN114630204A (en) * | 2022-03-10 | 2022-06-14 | 成都中科慧源科技有限公司 | Low-power consumption thing networking instrument data acquisition system |
| CN114630204B (en) * | 2022-03-10 | 2024-10-18 | 成都中科慧源科技有限公司 | Low-power consumption internet of things instrument data acquisition system |
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Effective date of registration: 20231027 Address after: Delaware Patentee after: Saivante Systems Address before: 523000 building C7, we Valley, Everbright, No.16, Keji 4th Road, Songshanhu high tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: Dongguan Fenggu Technology Co.,Ltd. |