CN218976383U - Self-locking power supply circuit for BMS - Google Patents

Abstract

The utility model relates to a self-locking power supply circuit for a BMS (battery management system), which comprises a key switch, a power supply chip, a control chip and a trigger, wherein the key switch is respectively connected with the power supply chip and the control chip, the power supply chip is connected with the control chip, the control chip is connected with the trigger, the trigger is connected with the power supply chip, the trigger is also connected with the control chip and forms feedback regulation, an electric signal output by the trigger is transmitted to the control chip, when the electric signal is required to be reset, the control chip preferentially detects an output signal of the trigger, and when the electric signal output by the trigger is detected to be at a high level, the power supply is kept. The utility model can keep the system in working state after the system updating is completed through the control chip.

Description

Self-locking power supply circuit for BMS

Technical Field

The present utility model relates to a BMS system, and more particularly, to a self-locking power supply circuit for a BMS.

Background

Currently, external switches for power supply of a BMS system generally adopt contact switches, and are powered on by short presses and powered off by long presses. But after the BMS system is subjected to program upgrading, the BMS system needs to be reset and restarted, at the moment, because no operator is used for carrying out short-time press starting operation on the BMS system again, the power supply of the BMS system cannot be kept, normal work after upgrading and jumping of the BMS is influenced, the operation is troublesome when the manual key is started again, the manual key is not suitable for the scenes of household energy storage or some unmanned operation, and corresponding cost can be increased by additionally adding an external power supply device.

Disclosure of Invention

Based on this, it is necessary to provide a self-locking power supply circuit for a BMS in order to solve the problem that power supply cannot be maintained after program upgrade of the BMS system is completed.

The utility model provides a auto-lock power supply circuit for BMS, includes key switch, power supply chip, control chip and trigger, key switch respectively with power supply chip with control chip connects, control chip with the trigger is connected, the trigger with power supply chip connects, the trigger still with control chip connects to form feedback regulation, the signal transmission of trigger output extremely control chip, when needing to reset, control chip preferably detects the output signal of trigger detects when the signal of trigger output is high level, keeps supplying power.

In one embodiment, the key switch outputs a high level to the power supply chip and the control chip by outputting an electrical signal to the power supply chip and the control chip, and the control chip determines a duration of the high level output by the key switch, determines whether the system is turned on or off, and outputs an electrical signal to the trigger, which outputs an electrical signal to the power supply chip.

In one embodiment, the trigger is one of an RS trigger, a D trigger, a JK trigger, and a T trigger.

In one embodiment, after the control chip is started or closed, the key switch and the power supply chip are in a disconnected state.

In one embodiment, the power supply chip outputs a high level signal to activate the control chip.

In one embodiment, the power supply chip is one of LM5164 or SY8501 YC.

In one embodiment, the control chip is one of STM32F103 or GD32F 303.

The utility model comprises a key switch, a power supply chip, a control chip and a trigger, wherein the control chip is connected with the trigger, the trigger is connected with the power supply chip, an electric signal output by the control chip can be transmitted to the trigger and can be fed back to the control chip 30, whether the electric signal output by the trigger 40 is in a high level or not can be judged by the control chip 30, and when the electric signal is in the high level, the system can supply power, so that the working state can be still maintained after the system updating is completed.

Drawings

Fig. 1 is a circuit diagram of the present utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

The utility model relates to a self-locking power supply circuit for a BMS, which can be applied to a BMS battery system, and solves the problem that the system needs manual operation for resetting and restarting after the program of the BMS battery system is updated.

Referring to fig. 1, the portable electronic device comprises a key switch 10, a power supply chip 20, a control chip 30 and a trigger 40, wherein the key switch 10 is respectively connected with the power supply chip 20 and the control chip 30, the power supply chip 20 is connected with the control chip 30, the control chip 30 is connected with the trigger 40, and the trigger 40 is respectively connected with the control chip 30 and the power supply chip 20; the key switch 10 outputs an electrical signal to the power supply chip 20 and the control chip 30, the key switch 10 outputs a high level to the power supply chip 20 and the control chip 30, the control chip 30 determines the duration of the high level output by the key switch 10, determines whether the system is on or off, and outputs an electrical signal to the trigger 40, the trigger 40 outputs an electrical signal to the power supply chip 20 again, the electrical signal output by the trigger 40 is transmitted to the control chip 30, when the reset is required to be started, the control chip 30 preferentially detects the electrical signal output by the trigger 40, and when the electrical signal output by the trigger 40 is high level, the system is kept powered.

It will be appreciated that the key switch 10 is an external power contact switch, and may be turned on for short presses and turned off for long presses. The specific working principle is as follows, when the key switch 10 is pressed down in normal operation, the key switch 10 outputs a short-time high-level wake-up signal and transmits the high-level wake-up signal to the power supply chip 20, the power supply chip 20 starts working after receiving the high-level wake-up signal and outputs low-voltage power supply to the control chip 30, the control chip 30 simultaneously detects the effective time of the high-level wake-up signal, and when the effective time accords with the short-press start-up time, the system can be considered to be started up, so that the control chip 30 can cut into a working state; the control chip 30 is switched into the working state, the control chip 30 outputs a short-time high-level signal to the trigger 40, the trigger 40 outputs a high-level signal and keeps the high-level signal to the power supply chip 20, and after the key is cancelled, namely the high-level wake-up signal disappears, the system can self-maintain power supply. Thus, the opening operation of the whole system is completed.

When the system needs to be shut down, namely, the key switch 10 is pressed for a long time, the key switch 10 outputs a long-time high-level wake-up signal, the control chip 30 detects whether the effective time of the high-level wake-up signal accords with the long-time press shut down time, and when the effective time accords with the long-time press shut down time, the system is considered to be shut down, the control chip 30 outputs a high-level signal to the trigger 40 once again, the trigger 40 outputs a signal to the power supply chip 20, the power supply chip 20 stops supplying power, the control chip 30 stops working, and the system is powered down and shut down.

It can be understood that when the power supply chip 20 needs to be turned on, the power supply chip 30 can supply power to the control chip 30, so that the control chip 30 is turned on first, and can detect the high-level wake-up signal time, and when the power-on time is met, the control chip 30 will output signals to other circuits to complete the turn-on of the circuits.

Further, in this embodiment, by adding the flip-flop 40, when the entire circuit needs to be turned on, the control chip 30 will output the high-level signal to the flip-flop 40 first, and the flip-flop 40 feeds back the high-level signal to the power supply chip 20, so as to complete the path of the entire circuit, thereby being turned on. When the system needs to be turned off, the system is turned off when the key switch 10 is pressed for a long time and the high level signal time output by the key switch 10 accords with the long-press power-off time.

The trigger 40 is connected to the control chip 30, and when the system needs to be reset after the upgrade procedure, the control chip 30 will first determine the electrical signal output by the trigger 40, and when the signal is at a high level, the trigger 40 is connected to the control chip 30, and the power supply chip 20 is also connected to the control chip 30, in this case, the electrical signal between the trigger 40 and the control chip 30 will be determined preferentially. By introducing the trigger 40, feedback adjustment between the control chip 30 and the trigger 40 can be formed, and when reset is required after the system upgrading procedure, the feedback adjustment between the control chip 30 and the trigger 40 can avoid the need of manually resetting the key to start operation, so that the working state can be maintained after the system updating is completed, and additional power supply operation is not required to be added.

After the control chip 30 is turned on or off, the key switch 10 and the power supply chip 20 are in an off state, and after the control chip 30 is turned on or off, the key switch 10 is not required to output an electrical signal to the power supply chip 20, and is in the off state.

In this embodiment, the power supply chip 10 outputs a high level signal to activate the control chip 30. The control chip 30 is started by adopting the output high level, and when the electric signal transmitted to the control chip 30 by the power supply chip 10 is high level, the control chip 30 is started.

In this embodiment, the flip-flop may have various choices, for example, the flip-flop is one of an RS flip-flop, a D flip-flop, a JK flip-flop, and a T flip-flop, and may be designed according to actual needs.

Meanwhile, the power supply chip can be a DCDC conversion chip and a power supply chip, the power supply chip is one of LM5164 or SY8501YC, and the control chip is one of STM32F103 or GD32F303, so that the use of the system is ensured.

The utility model comprises a key switch 10, a power supply chip 20, a control chip 30 and a trigger 40, wherein the control chip 30 is connected with the trigger 40, the key switch 10 is respectively connected with the power supply chip 20 and the control chip 30, the power supply chip 20 is connected with the control chip 30, the control chip 30 is connected with the trigger 40, the trigger 40 is connected with the power supply chip 20, the trigger 40 is also connected with the control chip 30, feedback regulation is formed, an electric signal output by the trigger 40 is directly fed back to the control chip 30, whether the electric signal output by the trigger 40 is in a high level or not can be judged firstly by the control chip 30, and when the electric signal output by the trigger 40 is in the high level, the system can supply power, so that the working state can be still maintained after the system updating is completed.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (7)

1. A self-locking power supply circuit for BMS, its characterized in that includes key switch (10), power supply chip (20), control chip (30) and trigger (40), key switch respectively with power supply chip with control chip connects, control chip with the trigger is connected, the trigger with power supply chip connects, the trigger still with control chip connects to form feedback regulation, the signal transmission of trigger output extremely control chip, when needs reset, control chip preferentially detects the output signal of trigger, detects when the signal of trigger output is high level, keeps supplying power.

2. The self-locking power supply circuit for the BMS according to claim 1, wherein the key switch outputs a high level to the power supply chip and the control chip by outputting an electric signal to the power supply chip and the control chip, the control chip determines a duration of the high level output by the key switch, determines whether a system is turned on or off, and outputs an electric signal to the trigger, which in turn outputs an electric signal to the power supply chip.

3. The self-locking power supply circuit for the BMS according to claim 1, wherein the flip-flop is one of an RS flip-flop, a D flip-flop, a JK flip-flop, a T flip-flop.

4. The self-locking power supply circuit for the BMS according to claim 1, wherein the key switch is in a disconnected state from the power supply chip after the control chip is turned on or off.

5. The self-locking power supply circuit for the BMS according to claim 1, wherein the power supply chip outputs a high level signal to activate the control chip.

6. The self-locking power supply circuit for the BMS according to claim 1, wherein the power supply chip is one of LM5164 or SY8501 YC.

7. The self-locking power supply circuit for a BMS according to claim 1, wherein the control chip is one of STM32F103 or GD32F 303.

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