Power management device of mobile cart

Abstract

The utility model relates to the technical field of power management, in particular to a power management device of a mobile cart, which comprises a power management circuit board, the power management circuit board is provided with a sampling module, an indicator light board and a switch, the power management circuit board is provided with a central processing unit MCU, and the central processing unit MCU is connected with an external load through the sampling module. The indicating lamp panel and the switch are electrically connected with the central processing unit MCU respectively; the power management circuit board is further provided with a charging control circuit, and the charging control circuit comprises a battery interface P3, a switching power supply charger output interface P4, a rear-end load interface P5, a load switch module and an anti-reverse-series circuit module. According to the utility model, seamless switching for supplying power to a rear-end load is realized; under the action of one-way conduction of the anti-reverse-connection circuit module, the structure is reliable, the stability is high, and the safety is high; and the electric quantity of the battery is fed back through the indicator lamp panel, so that users can know timely.

Description

Technical Field

[0001] The utility model relates to the technical field of power management, in particular to a mobile cart power management device. Background Art

[0002] The existing mobile cart power management system is complex in design and cannot achieve seamless switching between external AC power and battery power. The device cannot be charged while in use or cannot be used while charging. The power management system in the existing mobile cart technology lacks corresponding measures to feedback the battery power, and cannot promptly detect whether the cart is out of power. The cart equipment cannot be turned on when in use. Summary of the invention

[0003] In view of the problems of the prior art, the utility model provides a mobile cart power management device, which has a novel structure and ingenious design, and realizes seamless switching to supply power to the rear-end load. In addition, due to the unidirectional conduction of the anti-reverse connection circuit module, the output interface P4 of the switching power supply charger will not be reversely supplied, and the structure is reliable, the stability is strong, and the safety is high. The battery power is fed back through the indicator light panel so that the user can understand it in time.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model provides a mobile cart power management device, which includes a power management circuit board, wherein the power management circuit board is provided with a sampling module, an indicator light board, a power detection module and a switch, wherein the power detection module is a conventional BMS battery detection module, which is a prior art and will not be described in detail herein; the power management circuit board is provided with a central processing unit MCU, wherein the central processing unit MCU is connected to an external load through the sampling module, and the indicator light board, the power detection module and the switch are electrically connected to the central processing unit MCU respectively; the power management circuit board is also provided with a charging control circuit, wherein the charging control circuit includes a battery interface P3, a switching power supply charger output interface P4, a rear end load interface P5, a load switch module and an anti-reverse series circuit module, wherein the switching power supply charger output interface P4 is connected to the battery interface P3 after passing through the anti-reverse series circuit module, and the battery interface P3 is used to be connected to a battery; the battery interface P3 is connected to the rear end load interface P5 through the load switch module, and the rear end load interface P5 is used to be connected to an external load.

[0006] The anti-reverse series circuit module includes a MOS tube Q1, a MOS tube Q2, a chip U2, a capacitor C9, a diode D3 and a resistor R11, the charging control circuit includes a fuse F1, the model of the chip U2 is LTC4359, one end of the fuse F1 is connected to the source of the MOS tube Q1, the source of the MOS tube Q2, the anode of the diode D3 and the pin IN, pin SHDN and pin SOURCE of the chip U2, the drain of the MOS tube Q1 and the drain of the MOS tube Q2 are connected to the pin OUT of the chip U2, the gate of the MOS tube Q1 and the gate of the MOS tube Q2 are respectively connected to the pin GATE of the chip U2, the drain of the MOS tube Q1 and the drain of the MOS tube Q2 are also connected to the battery interface P3, the drain of the MOS tube Q1 and the drain of the MOS tube Q2 are also connected to one end of the capacitor C9, the other end of the capacitor C9 and the pin VSS of the chip U2 are respectively connected to one end of the resistor R11, and the other end of the resistor R11 is grounded.

[0007] The load switch module includes a MOS tube Q4, a MOS tube Q5, a fuse F2, a fuse F3 and a diode D4, the fuse F2 is connected in parallel with the fuse F3, the battery interface P3 is connected to one end of the fuse F2, the other end of the fuse F2 is connected to the source of the MOS tube Q4 and the source of the MOS tube Q5, the drain of the MOS tube Q4, the drain of the MOS tube Q5 and the diode D4 are respectively connected to the rear-end load interface P5, and the gate of the MOS tube Q4 is connected to the gate of the MOS tube Q5.

[0008] The charging control circuit includes a surge protection module and a filter module, and the switching power supply charger output interface P4 is connected to the battery interface P3 through the surge protection module, the filter module, the fuse F1 and the reverse connection protection circuit module in sequence.

[0009] Wherein, the surge protection module is a diode D2.

[0010] The filtering module includes a capacitor C5 and a resistor R4, and the capacitor C5 is connected in parallel with the resistor R4.

[0011] The central processing unit MCU includes a chip U8, and the model of the chip U8 is GD32E230C8T6.

[0012] The sampling module includes a chip U10, and the model of the chip U10 is INA214AIDCKR.

[0013] The central processing unit MCU is provided with a transceiver module, and the transceiver module includes a chip U9, and the model of the chip U9 is MAX13487EESA.

[0014] Beneficial effects of the utility model:

[0015] The utility model has a novel structure and an ingenious design. When working, the output interface P4 of the switching power supply charger is used for output by an external charger, and enters the anti-reverse circuit module during output. Under the action of the anti-reverse circuit module, it plays a unidirectional conduction role. When charging, the output from the switching power supply charger output interface P4 is transmitted to the battery connected to the battery interface P3 after passing through the anti-reverse circuit module to charge it; when the charger is unplugged, the external battery supplies power to the load connected to the rear-end load interface P5 through the battery interface P3 via the load switch module, thereby realizing seamless switching to supply power to the rear-end load; in addition, due to the unidirectional conduction of the anti-reverse circuit module, the switching power supply charger output interface P4 will not be reversely supplied, the structure is reliable, the stability is strong, and the safety is high; further, the battery power can be detected through the central processing unit MCU and the power detection module, and after the detection, the battery power is fed back through the indicator light board so that the user can understand it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a functional block diagram of a mobile cart power management device.

[0017] Figure 2 This is a circuit diagram of the sampling module of the present utility model.

[0018] Figure 3 The utility model is a circuit diagram of the anti-reverse circuit module.

[0019] Figure 4 1 is a circuit diagram of a transceiver of the present utility model.

[0020] Figure 5 The utility model is a circuit diagram of the central processing unit MCU. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0022] A mobile cart power management device, such as Figures 1 to 5As shown, it includes a power management circuit board, which is provided with a sampling module, an indicator light board, a power detection module and a switch. The power detection module is a conventional BMS battery detection module, which is a prior art and will not be described here in detail. The switch can be used to start and close the battery of the mobile cart with one button. The power management circuit board is provided with a central processing unit MCU, which is connected to the external load through the sampling module, and the indicator light board, the power detection module and the switch are electrically connected to the central processing unit MCU respectively; the power management circuit board is also provided with a charging control circuit, which includes a battery interface P3, a switching power supply charger output interface P4, a rear-end load interface P5, a load switch module and an anti-reverse series circuit module. The switching power supply charger output interface P4 is connected to the battery interface P3 after passing through the anti-reverse series circuit module, and the battery interface P3 is used to connect to the battery; the battery interface P3 is connected to the rear-end load interface P5 through the load switch module, and the rear-end load interface P5 is used to connect to the external load.

[0023] Specifically, the utility model has a novel structure and an ingenious design. When working, the output interface P4 of the switching power supply charger is used for output by an external charger, and enters the anti-reverse circuit module during output. Under the action of the anti-reverse circuit module, it plays a unidirectional conduction role. When charging, the output from the switching power supply charger output interface P4 is transmitted to the battery connected to the battery interface P3 after passing through the anti-reverse circuit module to charge it; when the charger is unplugged, the external battery supplies power to the load connected to the rear-end load interface P5 through the battery interface P3 via the load switch module, thereby realizing seamless switching to supply power to the rear-end load; in addition, due to the unidirectional conduction of the anti-reverse circuit module, the switching power supply charger output interface P4 will not be reversely supplied, and the structure is reliable, stable and safe; further, the battery power can be detected through the central processing unit MCU and the power detection module. After detection, the battery power is fed back through the indicator light board so that the user can understand it in time.

[0024] In this embodiment, the anti-reverse series circuit module includes a MOS tube Q1, a MOS tube Q2, a chip U2, a capacitor C9, a diode D3 and a resistor R11. The model of the chip U2 is LTC4359. The charging control circuit includes a fuse F1. One end of the fuse F1 is connected to the source of the MOS tube Q1, the source of the MOS tube Q2, the anode of the diode D3, and the pin IN, the pin SHDN, and the pin SOURCE of the chip U2. The drain of the MOS tube Q1 and the drain of the MOS tube Q2 are connected to the pin OUT of the chip U2. The gate of the MOS tube Q1 and the gate of the MOS tube Q2 are respectively connected to the pin GATE of the chip U2. The drain of the MOS tube Q1 and the drain of the MOS tube Q2 are also connected to the battery interface P3. The drain of the MOS tube Q1 and the drain of the MOS tube Q2 are also connected to one end of the capacitor C9. The other end of the capacitor C9 and the pin VSS of the chip U2 are respectively connected to one end of the resistor R11, and the other end of the resistor R11 is grounded. The load switch module includes a MOS tube Q4, a MOS tube Q5, a fuse F2, a fuse F3 and a diode D4, the fuse F2 is connected in parallel with the fuse F3, the battery interface P3 is connected to one end of the fuse F2, the other end of the fuse F2 is connected to the source of the MOS tube Q4 and the source of the MOS tube Q5, the drain of the MOS tube Q4, the drain of the MOS tube Q5 and the diode D4 are respectively connected to the rear-end load interface P5, and the gate of the MOS tube Q4 is connected to the gate of the MOS tube Q5.

[0025] In this embodiment, the charging control circuit includes an anti-surge module, a filter module and a fuse F1, and the switching power supply charger output interface P4 is connected to the battery interface P3 through the anti-surge module, the filter module, the fuse F1 and the anti-reverse connection circuit module in sequence. The anti-surge module is a diode D2. The filter module includes a capacitor C5 and a resistor R4, and the capacitor C5 is connected in parallel with the resistor R4.

[0026] Specifically, during operation, the output interface P4 of the switching power supply charger is used for outputting an external switching power supply charger. During outputting, the output passes through the surge protection module and the filtering module to achieve the surge protection effect, and then is filtered. After passing through the fuse F1, the output enters the anti-reverse connection circuit module. Under the action of the MOS tube Q1 and the MOS tube Q2, the output plays a unidirectional conduction role. During charging, the output from the switching power supply charger output interface P4 passes through the MOS tube Q1 and the MOS tube Q2 and is then transmitted to the external battery connected to the battery interface P3 to charge the external battery. When the charger is unplugged, the external battery supplies power to the load connected to the rear-end load interface P5 through the battery interface P3 via the load switch module, thereby realizing seamless switching to supply power to the rear-end load. In addition, due to the unidirectional conduction of the MOS tube Q1 and the MOS tube Q2, the switching power supply charger output interface P4 will not be reversely supplied, so the structure is reliable, the stability is strong, and the safety is high. Under the above setting, after the charger is unplugged, the external battery presses the charging switch for the load to be charged by the battery, and the MOS tube Q4 and the MOS tube Q5 are driven to open to supply power to the load connected to the rear-end load interface P5, and the fuse F2 and the fuse F3 play a protective role.

[0027] In this embodiment, the central processing unit MCU includes a chip U8, and the model of the chip U8 is GD32E230C8T6. The sampling module includes a chip U10, and the model of the chip U10 is INA214AIDCKR. The power management circuit board is also provided with a transceiver, and the transceiver includes a chip U9, and the model of the chip U9 is MAX13487EESA.

[0028] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A mobile cart power management device, characterized in that: The invention comprises a power management circuit board, which is provided with a sampling module, an indicator light board, a power detection module and a switch. The power management circuit board is provided with a central processing unit MCU, and the central processing unit MCU is connected to an external load through the sampling module. The indicator light board, the power detection module and the switch are electrically connected to the central processing unit MCU respectively; the power management circuit board is also provided with a charging control circuit, and the charging control circuit comprises a battery interface P3, a switching power supply charger output interface P4, a rear-end load interface P5, a load switch module and an anti-reverse series circuit module. The switching power supply charger output interface P4 is connected to the battery interface P3 after passing through the anti-reverse series circuit module, and the battery interface P3 is used to be connected to a battery; the battery interface P3 is connected to the rear-end load interface P5 through the load switch module, and the rear-end load interface P5 is used to be connected to an external load.

2. A mobile cart power management device according to claim 1, characterized in that: The anti-reverse series circuit module includes a MOS tube Q1, a MOS tube Q2, a chip U2, a capacitor C9, a diode D3 and a resistor R11. The charging control circuit includes a fuse F1. The model of the chip U2 is LTC4359. One end of the fuse F1 is connected to the source of the MOS tube Q1, the source of the MOS tube Q2, the anode of the diode D3, and the pins IN, SHDN and SOURCE of the chip U2. The drain of the MOS tube Q1 and the drain of the MOS tube Q2 are connected to the pin OUT of the chip U2. The gate of the MOS tube Q1 and the gate of the MOS tube Q2 are respectively connected to the pin GATE of the chip U2. The drain of the MOS tube Q1 and the drain of the MOS tube Q2 are also connected to the battery interface P3. The drain of the MOS tube Q1 and the drain of the MOS tube Q2 are also connected to one end of the capacitor C9. The other end of the capacitor C9 and the pin VSS of the chip U2 are respectively connected to one end of the resistor R11, and the other end of the resistor R11 is grounded.

3. A mobile cart power management device according to claim 1, characterized in that: The load switch module includes a MOS tube Q4, a MOS tube Q5, a fuse F2, a fuse F3 and a diode D4. The fuse F2 is connected in parallel with the fuse F3. The battery interface P3 is connected to one end of the fuse F2. The other end of the fuse F2 is connected to the source of the MOS tube Q4 and the source of the MOS tube Q5. The drain of the MOS tube Q4, the drain of the MOS tube Q5 and the diode D4 are respectively connected to the rear-end load interface P5. The gate of the MOS tube Q4 is connected to the gate of the MOS tube Q5.

4. A mobile cart power management device according to claim 2, characterized in that: The charging control circuit also includes a surge protection module and a filter module. The switching power supply charger output interface P4 is connected to the battery interface P3 through the surge protection module, the filter module, the fuse F1 and the reverse connection protection circuit module in sequence.

5. A mobile cart power management device according to claim 4, characterized in that: The surge protection module is a diode D2.

6. A mobile cart power management device according to claim 4, characterized in that: The filtering module includes a capacitor C5 and a resistor R4, and the capacitor C5 is connected in parallel with the resistor R4.

7. A mobile cart power management device according to claim 1, characterized in that: The central processing unit MCU includes a chip U8, and the model of the chip U8 is GD32E230C8T6.

8. The mobile cart power management device according to claim 1, characterized in that: The sampling module includes a chip U10, and the model of the chip U10 is INA214AIDCKR.

9. The mobile cart power management device according to claim 1, characterized in that: The central processing unit MCU is provided with a transceiver module, and the transceiver module includes a chip U9, and the model of the chip U9 is MAX13487EESA.

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