Low-power-consumption control circuit and control system of shifting machine

Abstract

The utility model relates to a low-power-consumption control circuit and a control system of a shifting machine. The low-power-consumption control circuit comprises an MCU circuit, a discharging control and discharging current detection circuit, a battery voltage detection circuit, a charging control and charging current detection circuit, a battery state indication circuit and an external power supply voltage detection circuit. The MCU circuit is electrically connected with the discharging control and discharging current detection circuit, the battery voltage detection circuit, the battery state indication circuit, the charging control and charging current detection circuit and the external power supply voltage detection circuit, and the external power supply voltage detection circuit and the charging control and charging current detection circuit are electrically connected with an external power supply. And the discharge control and discharge current detection circuit is electrically connected with the control box. According to the utility model, ultra-low power consumption can be realized, and standby time can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric medical treatment and nursing, in particular to a low-power consumption control circuit and a control system of a transfer machine. Background Art

[0002] As auxiliary medical and nursing items, transfer machines are indispensable in hospitals. Currently, the transfer machines on the market are mainly divided into manual transfer machines and electric transfer machines. Among them, electric transfer machines have gradually become the mainstream due to their convenient operation and comfortable experience.

[0003] Due to its special features, electric lifts must be equipped with large backup batteries and control drive systems to ensure their mobility and durability. In order to ensure mobility, the lift cannot be connected to the power supply all the time, and there will be a need for transportation or standby. It is necessary to switch between low power consumption and normal use modes simply and quickly, and the existing low power consumption circuits are not "low" enough, generally around 500 microamperes, which cannot meet the higher ultra-low power consumption requirements. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a low-power control circuit and a control system for a transfer machine.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a low-power control circuit, including an MCU circuit, a discharge control and discharge current detection circuit, a battery voltage detection circuit, a charge control and charging current detection circuit, a battery status indication circuit and an external power supply voltage detection circuit; the MCU circuit is electrically connected to the discharge control and discharge current detection circuit, the battery voltage detection circuit, the battery status indication circuit, the charge control and charging current detection circuit, and the external power supply voltage detection circuit respectively; the discharge control and discharge current detection circuit, the battery voltage detection circuit, the charge control and charging current detection circuit are all used to connect to the battery, and the external power supply voltage detection circuit and the charge control and charging current detection circuit are all used to be electrically connected to the external power supply.

[0006] The discharge control and discharge current detection circuit includes a MOS tube, a Schottky diode, a sampling resistor, a current detection chip, and a triode; wherein the source of the MOS tube is used to connect to a battery, the drain of the MOS tube is connected to the positive electrode of a large current Schottky diode, the negative electrode of the large current Schottky diode is connected to one end of the sampling resistor, both ends of the sampling resistor are also connected to the current detection chip, the output end of the current detection chip is connected to an MCU circuit, the gate of the MOS tube is connected to the collector of the triode, the emitter of the triode is grounded, and the base of the triode is connected to the output end of the MCU circuit.

[0007] The Schottky diode is a high-current Schottky diode.

[0008] The MCU circuit adopts the GD32E230C876 chip.

[0009] A control system for a transfer machine includes a battery box, one or more batteries and the above-mentioned low-power control circuit, wherein the batteries and the low-power control circuit are placed in the battery box, the batteries are connected to the low-power control circuit, and also includes a control box, which is electrically connected to the battery box.

[0010] The control box is electrically connected to the discharge control and discharge current detection circuit.

[0011] The control system of the transfer machine also includes an emergency stop switch for cutting off the circuit of the control box. The emergency stop switch is arranged on the transfer machine and is electrically connected to the control box.

[0012] The batteries are two lead-acid batteries.

[0013] The control system of the transfer machine also includes an anti-short circuit for preventing the battery from short-circuiting and burning, and the anti-short circuit is electrically connected between the two lead-acid batteries.

[0014] The utility model has the following advantages and beneficial effects:

[0015] 1. The low-power control system of the utility model can achieve ultra-low power consumption and improve standby time (power consumption is as low as 50 microamperes during low-power operation).

[0016] 2. The battery of the utility model has the functions of preventing overcharge, overdischarge, short circuit and overcurrent.

[0017] 3. The battery of the utility model can detect the charging and discharging current and voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural block diagram of a control system for a transfer machine according to an embodiment of the utility model;

[0019] Figure 2 The schematic diagram of the discharge control and discharge current detection circuit of the embodiment of the utility model;

[0020] Figure 3 The circuit schematic diagram of the charging control and charging current detection circuit of the embodiment of the utility model;

[0021] Figure 4 A circuit schematic diagram of a battery voltage detection circuit according to an embodiment of the present utility model;

[0022] Figure 5 A circuit schematic diagram of a battery status indication circuit according to an embodiment of the utility model;

[0023] Figure 6 A circuit schematic diagram of an external power supply voltage detection circuit according to an embodiment of the utility model;

[0024] Figure 7 A circuit schematic diagram of an MCU circuit according to an embodiment of the present utility model;

[0025] Figure 8 The schematic diagram of the circuit of the external power supply of the embodiment of the utility model is shown in FIG. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are not intended to limit the protection scope of the present utility model.

[0028] like Figure 1 As shown, the utility model realizes a low-power control circuit (located in the dotted box) through circuit design and MCU chip control, which is used to control and detect the operation of the battery. The low-power control circuit includes an MCU circuit, a discharge control and discharge current detection circuit, a battery voltage detection circuit, a charge control and charge current detection circuit, a battery status indication circuit and an external power supply voltage detection circuit; the MCU circuit is electrically connected to the discharge control and discharge current detection circuit, the battery voltage detection circuit, the battery status indication circuit, the charge control and charge current detection circuit, and the external power supply voltage detection circuit respectively, and the discharge control and discharge current detection circuit, the battery voltage detection circuit, the charge control and charge current detection circuit are all used to connect the battery, and the external power supply voltage detection circuit and the charge control and charge current detection circuit are all used to be electrically connected to the external power supply. When the battery is charging, the charge control and charge current detection circuit prevents the charging current from being too large to damage the battery, and prevents the battery from being overcharged to damage the battery. The battery is prevented from being "starved to death" by the low battery voltage through the discharge control and discharge current detection circuit.

[0029] like Figure 1As shown, an embodiment of the utility model also provides a control system for a shifting machine, including a battery box, one or more batteries and the above-mentioned low-power control circuit, wherein the battery and the low-power control circuit are placed in the battery box, and the battery is connected to the low-power control circuit, and also includes a control box, and the control box is electrically connected to the battery box. An external power supply is connected to the battery, and the battery is connected to the control box, and the control box is used to control the operation of the low-power control circuit. The control box is electrically connected to the discharge control and discharge current detection circuit in the low-power control circuit. The control system of the shifting machine also includes an emergency stop switch for cutting off the control box circuit, and the emergency stop switch is arranged on the shifting machine and is electrically connected to the control box. The batteries are two lead-acid batteries. The control system of the shifting machine also includes an anti-short-circuit circuit for preventing the battery from short-circuiting and burning, and the anti-short-circuit circuit is electrically connected between the two lead-acid batteries.

[0030] The lift itself has low power consumption in standby mode. The emergency stop switch (set on the lift, connected to the control box) can cut off the circuit of the control box to ensure that the lift is stopped in an emergency. The battery can detect the external power supply voltage and the internal voltage of the battery. When it is detected that the external power supply is not supplying power, the battery power supply is turned on and the current battery power supply current is detected. When it is detected that there is an external power supply, the battery starts to charge and the current battery charging current is detected. When the external power supply is used, the drive system is in a stopped state. The battery has an anti-short circuit to prevent the battery from burning due to short circuit. The anti-short circuit has a 15A fast-acting fuse added to the battery end.

[0031] Figure 2 It is a discharge control and discharge current detection circuit. Among them, T1 is a triode, Q1 is a MOS tube, D1 is a high-current Schottky diode, R1 is a sampling resistor, and IC1 is a current detection chip. Battery+ is connected to the positive electrode of the battery internally and to the control box externally. Battery_out+ is connected to the control box externally. When the MCU circuit detects that there is no external power supply, it controls T1 to turn on (controlled by the voltage size of Battery_output_en), thereby causing Q1 to turn on, and the battery starts to supply power. After passing through the sampling resistor R1 and the current detection chip IC1, the battery discharge current (ADC_DischargeCurrent) is output to the MCU circuit. When the MCU circuit detects that the battery is not installed or the system is in standby mode, it controls T1 to turn off, causing Q1 to turn off, and the battery stops supplying power to the outside, achieving low power consumption. The power consumption is as low as 50 microamperes during low power operation.

[0032] Figure 3This is a charging control and charging current detection circuit. T2 is a transistor, Q2 is a MOS tube, F1 is a fuse, D3 is a diode, R7 is a sampling resistor, and IC2 is a current detection chip. T3 and Q2 are used to control the external power supply to charge the battery. R7 and IC2 are used to detect the charging current.

[0033] Figure 4 This is the battery voltage detection circuit. IC4 is an op amp. The battery voltage and external power supply voltage are amplified by the op amp and then given to the MCU circuit.

[0034] Figure 5 The battery status indication circuit includes a buzzer and a battery power indication circuit. Figure 5 The upper part is the buzzer circuit. The battery power indicator circuit controls the corresponding pins to output high and low levels through the MCU circuit according to the calculated battery power, and turns on and off transistors T3~T6 (i.e. indicator lights) respectively, and controls LED1~LED4 to light up or turn off, which is used to indicate the current working status and battery power.

[0035] Figure 6 This is an external power supply voltage detection circuit. When an external power supply is inserted, the voltage is divided by R39 and R41, and a level is given to the corresponding pin of the MCU circuit. The MCU circuit detects the voltage parameters of the corresponding external power supply based on this level.

[0036] Figure 7 It is an MCU circuit. IC3 is the MCU chip, SG1 is the buzzer, and T5 and T6 are transistors. The MCU circuit is used to control charging and discharging, and detect charging and discharging voltage and current. The buzzer is used to remind the user of the current working status of the battery. LED1~LED4 lights display the current battery power. T7 is used to detect external buttons.

[0037] Figure 8 The schematic diagram of the circuit for the external power supply. IC5 is a linear voltage regulator chip, Q3 is a MOS tube, and T9 and T10 are transistors. The circuit composed of T10, T9, and Q3 can achieve low power consumption when the battery is not connected to the control box and the external power supply. The circuit composed of T10 and Q3 can realize the function of external button wake-up control system (i.e. release low power mode), specifically: when an external button is pressed, the Button_Pressed pin detects a high level. At the same time, the T10 transistor will be turned on. The conduction of the T10 transistor will cause the Q3 MOS tube to be turned on. Then IC5 outputs 3.3V to power the system to realize the wake-up function.

Claims

1. A low power consumption control circuit, characterized in that: It includes an MCU circuit, a discharge control and discharge current detection circuit, a battery voltage detection circuit, a charge control and charge current detection circuit, a battery status indication circuit and an external power supply voltage detection circuit; the MCU circuit is electrically connected to the discharge control and discharge current detection circuit, the battery voltage detection circuit, the battery status indication circuit, the charge control and charge current detection circuit and the external power supply voltage detection circuit respectively; the discharge control and discharge current detection circuit, the battery voltage detection circuit, the charge control and charge current detection circuit are all used to connect to the battery; the external power supply voltage detection circuit and the charge control and charge current detection circuit are all used to electrically connect to the external power supply.

2. The low power consumption control circuit according to claim 1, characterized in that: The discharge control and discharge current detection circuit includes a MOS tube, a Schottky diode, a sampling resistor, a current detection chip, and a triode; wherein the source of the MOS tube is used to connect to a battery, the drain of the MOS tube is connected to the positive electrode of a large current Schottky diode, the negative electrode of the large current Schottky diode is connected to one end of the sampling resistor, both ends of the sampling resistor are also connected to the current detection chip, the output end of the current detection chip is connected to an MCU circuit, the gate of the MOS tube is connected to the collector of the triode, the emitter of the triode is grounded, and the base of the triode is connected to the output end of the MCU circuit.

3. The low power consumption control circuit according to claim 2, characterized in that: The Schottky diode is a high-current Schottky diode.

4. The low power consumption control circuit according to claim 1, characterized in that: The MCU circuit adopts the GD32E230C876 chip.

5. A control system for a transfer machine, characterized in that: It includes a battery box, one or more batteries and the low-power control circuit as described in claim 1, wherein the battery and the low-power control circuit are placed in the battery box, the battery is connected to the low-power control circuit, and also includes a control box, which is electrically connected to the battery box.

6. A control system for a transfer machine according to claim 5, characterized in that: The control box is electrically connected to the discharge control and discharge current detection circuit.

7. A control system for a transfer machine according to claim 6, characterized in that: It also includes an emergency stop switch for cutting off the control box circuit. The emergency stop switch is arranged on the transfer machine and is electrically connected to the control box.

8. The control system of a transfer machine according to claim 5, characterized in that: The batteries are two lead-acid batteries.

9. A control system for a transfer machine according to claim 8, characterized in that: The invention also comprises an anti-short circuit for preventing the battery from being burned by short circuit, wherein the anti-short circuit is electrically connected between the two lead-acid batteries.

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