Battery charging and discharging circuit of multi-compartment battery swap cabinet

Abstract

The utility model relates to the technical field of charging and discharging circuit, especially in a kind of multi-compartment battery swap cabinet battery charging and discharging circuit, including AC conversion DC input circuit, first channel circuit, second channel circuit, other channel circuit and MCU circuit, first channel circuit, second channel circuit, other channel circuit are connected with AC conversion DC input circuit respectively, first channel circuit, second channel circuit are connected with MCU circuit respectively;First channel circuit includes drive circuit A, and second channel circuit includes drive circuit B, and drive circuit A and drive circuit B are connected with MCU circuit respectively.Compared with prior art, the utility model's multi-compartment battery swap cabinet battery charging and discharging circuit realizes the externalization of battery equalization by the intelligent charging and discharging management of battery swap cabinet end, successfully avoids the expensive bidirectional BUCK-BOOST circuit, and has significant cost and performance advantages.

Description

[Technical Field] This utility model relates to the field of charging and discharging circuit technology, and in particular to a battery charging and discharging circuit for a multi-compartment battery swapping cabinet. [Background Technology] Existing battery swapping cabinets typically have a dedicated bidirectional BUCK-BOOST circuit inside, which is relatively expensive, resulting in high costs for the swapping cabinets. [Utility Model Content] To overcome the above problems, this utility model proposes a battery charging and discharging circuit for a multi-compartment battery swapping cabinet that can effectively solve the above problems.

[0001] The present invention provides a technical solution to solve the above-mentioned technical problems by providing a battery charging and discharging circuit for a multi-compartment battery swapping cabinet, including an AC-to-DC input circuit, a first channel circuit, a second channel circuit, other channel circuits, and an MCU circuit. The first channel circuit, the second channel circuit, and the other channel circuits are respectively connected to the AC-to-DC input circuit, and the first channel circuit and the second channel circuit are respectively connected to the MCU circuit. The first channel circuit includes a driving circuit A, and the second channel circuit includes a driving circuit B. The driving circuit A and the driving circuit B are respectively connected to the MCU circuit. Preferably, the AC-to-DC input circuit includes an AC / DC module and a filter capacitor C1. The first channel circuit includes a switch Q1, the second channel circuit includes a switch Q3, and the output terminal of the AC / DC module is connected to the filter capacitor C1, the switch Q1, the switch Q3, and other channel circuits, respectively.

[0002] Preferably, the switching transistor Q1 is connected to the driving circuit A, and the switching transistor Q3 is connected to the driving circuit B.

[0003] Preferably, the positive AC / DC output voltage of the AC / DC module is connected to pin 1 of the filter capacitor C1, the drain of the switching transistor Q1, the drain of the switching transistor Q3, and other channel circuits, and pin 2 of the filter capacitor C1 is connected to SGND.

[0004] Preferably, the first channel circuit further includes a switching transistor Q2, a power inductor L1, and an output filter capacitor C2. The gate (G) pin of the switching transistor Q1 is connected to the drive circuit A. The source (S) terminal of the switching transistor Q1 is connected to the gate (I) pin of the power inductor L1 and the drain (D) terminal of the switching transistor Q2. The gate (G) pin of the switching transistor Q2 is connected to the drive circuit A. The source (S) pin of the switching transistor Q2 is connected to SGND. The gate (II) pin of the power inductor L1 and the gate (I) pin of the output filter capacitor C2 are connected to the positive output BAT-1. The gate (II) pin of the output filter capacitor C2 is connected to SGND.

[0005] Preferably, the second channel circuit further includes a switching transistor Q4, a power inductor L2, and an output filter capacitor C3. The gate (G) pin of the switching transistor Q3 is connected to the drive circuit B. The source (S) terminal of the switching transistor Q3 is connected to the gate (I) pin of the power inductor L2 and the drain (D) terminal of the switching transistor Q4. The gate (G) pin of the switching transistor Q4 is connected to the drive circuit B. The source (S) pin of the switching transistor Q4 is connected to SGND. The gate (II) pin of the power inductor L2 and the gate (I) pin of the output filter capacitor C3 are connected to the output BAT-2. The gate (II) pin of the output filter capacitor C3 is connected to SGND.

[0006] Preferably, the other channel circuits include the third to Nth channel circuits, with one end of the other channel circuits connected to the AC / DC output and the other end connected to the power output.

[0007] Preferably, one output pin PWM-1H of the MCU circuit is connected to drive circuit A, one output pin PWM-1L is connected to drive circuit A, one output pin PWM-2H is connected to drive circuit B, and one output pin PWM-2L is connected to drive circuit B.

[0008] Compared with existing technologies, the battery charging and discharging circuit of this utility model's multi-compartment battery swapping cabinet achieves external battery balancing through intelligent charging and discharging management at the swapping cabinet end. This innovative technical approach successfully avoids the expensive bidirectional BUCK-BOOST circuit, offering significant cost and performance advantages. [Attached Image Description] Figure 1 This is a schematic diagram of the battery charging and discharging circuit of the multi-compartment battery swapping cabinet of this utility model.

Detailed Implementation Methods

[0009] It should be noted that in this embodiment of the invention, all directional indications (such as up, down, left, right, front, back, etc.) are limited to relative positions on the specified view, rather than absolute positions.

[0010] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0011] Please see Figure 1The battery charging and discharging circuit of the multi-compartment battery swapping cabinet of this utility model includes an AC to DC input circuit, a first channel circuit, a second channel circuit, other channel circuits and an MCU circuit. The first channel circuit, the second channel circuit and other channel circuits are respectively connected to the AC to DC input circuit, and the first channel circuit and the second channel circuit are respectively connected to the MCU circuit.

[0012] The first channel circuit includes a driving circuit A, and the second channel circuit includes a driving circuit B. The driving circuit A and the driving circuit B are respectively connected to the MCU circuit.

[0013] The AC-to-DC input circuit includes an AC / DC module and a filter capacitor C1. The first channel circuit includes a switch Q1, and the second channel circuit includes a switch Q3. The output terminal of the AC / DC module is connected to the filter capacitor C1, the switch Q1, the switch Q3, and other channel circuits, respectively.

[0014] The switching transistor Q1 is connected to the driving circuit A, and the switching transistor Q3 is connected to the driving circuit B.

[0015] Specifically, the positive AC / DC output voltage of the AC / DC module is connected to pin 1 of the filter capacitor C1, the drain of the switching transistor Q1, the drain of the switching transistor Q3, and other channel circuits, while pin 2 of the filter capacitor C1 is connected to SGND.

[0016] The first channel circuit also includes a switching transistor Q2, a power inductor L1, and an output filter capacitor C2. The gate (G) pin of the switching transistor Q1 is connected to the drive circuit A. The source (S) terminal of the switching transistor Q1 is connected to the gate (1) pin of the power inductor L1 and the drain (D) terminal of the switching transistor Q2. The gate (G) pin of the switching transistor Q2 is connected to the drive circuit A. The source (S) pin of the switching transistor Q2 is connected to SGND. The gate (2) pin of the power inductor L1 and the gate (1) pin of the output filter capacitor C2 are connected to the positive output BAT-1. The gate (2) pin of the output filter capacitor C2 is connected to SGND.

[0017] The second channel circuit also includes a switching transistor Q4, a power inductor L2, and an output filter capacitor C3. The gate (G) pin of the switching transistor Q3 is connected to the drive circuit B. The source (S) terminal of the switching transistor Q3 is connected to the gate (1) pin of the power inductor L2 and the drain (D) terminal of the switching transistor Q4. The gate (G) pin of the switching transistor Q4 is connected to the drive circuit B. The source (S) pin of the switching transistor Q4 is connected to SGND. The gate (2) pin of the power inductor L2 and the gate (1) pin of the output filter capacitor C3 are connected to the output BAT-2. The gate (2) pin of the output filter capacitor C3 is connected to SGND.

[0018] The other channel circuits include the third to Nth channel circuits, with one end connected to the AC / DC output and the other end connected to the power output. The third to Nth channel circuits are simplifications of the first channel circuit, and their functions and connections are similar to those of the first channel circuit.

[0019] The MCU circuit consists of a microcontroller and a VCC power supply circuit. One output pin PWM-1H of the MCU circuit is connected to drive circuit A, one output pin PWM-1L is connected to drive circuit A, one output pin PWM-2H is connected to drive circuit B, and one output pin PWM-2L is connected to drive circuit B.

[0020] Principle Explanation 1. Buck buck mode during multi-channel battery charging: The AC-to-DC output voltage of 95V is reduced to the charging voltage of the battery pack. After passing through the filter capacitor C1, the AC-to-DC output voltage provides input power to each channel circuit.

[0021] When PWM-1H is high and PWM-1L is low, the PWM-1H level is converted by the A level of the drive circuit, which turns Q1 on and Q2 off. The AC to DC output voltage of 95V is applied to inductor L1, C2 and the first channel battery through the DS terminals of Q1. The voltage of inductor L1 is + at pin 1 and - at pin 2. Inductor L1 stores energy and the inductor current increases linearly. The input voltage charges C2 and the first channel battery through the inductor at the same time. When PWM-1L and PWM-1H are low, Q1 is off and Q2 is off. When Q1 is off, since the current of inductor L1 cannot change abruptly, it will generate a reverse electromotive force. At this time, pin 2 of L1 is positive and pin 1 is negative. The inductor current forms a loop through the body diode of Q2. C2 and the inductor release energy to continue charging the channel 1 battery.

[0022] Similarly: when PWM-2H is high and PWM-2L is low, the PWM-2H level is converted by the driver circuit B level, which turns Q3 on and Q4 off. The AC to DC output voltage of 95V is applied to inductor L2 through the DS terminals of Q3. The voltage of inductor L2 is + at pin 1 and - at pin 2. Inductor L2 stores energy, and the inductor current increases linearly. The input voltage charges C3 and channel two battery through the inductor at the same time. When PWM-2L and PWM-2H are low, Q3 and Q4 are off. When Q3 is off, since the current of inductor L2 cannot change abruptly, it will generate a reverse electromotive force. Pin 2 of L2 is positive and pin 1 is negative. The inductor current forms a loop through the body diode of Q4. C3 and the inductor release energy to continue charging the channel two battery.

[0023] Similarly, this allows N channels of batteries to be charged simultaneously.

[0024] 2. BOOST boost mode during battery discharge and Buck buck mode during battery charging in other channels: The first channel battery discharges in reverse, and the boost circuit outputs a 95V DC voltage, the same as that used in AC-to-DC conversion, to provide voltage for the second channel or other channels.

[0025] When the second channel is in Buck mode during battery charging, when PWM-1L is high and PWM-1H is low, the PWM-1L level is converted by the driver circuit A level, which turns Q2 on and Q1 off. The battery voltage is applied to inductor L1 through C2. The voltage of inductor L1 is 2+ and 1-. Inductor L1 stores energy, and the inductor current increases linearly. When PWM-1L and PWM-1H are low, Q1 and Q2 are off. When Q2 is off, since the current of inductor L1 cannot change abruptly, it will generate a reverse electromotive force. Pin 1 of L1 is positive and pin 2 is negative. The energy stored in the inductor is connected to the battery voltage and supplied to C1 and the second channel or other channels through the body diode of Q1.

[0026] At this point, the battery in the first channel is discharging, while the battery in the second or other channels is charging.

[0027] Compared with existing technologies, the battery charging and discharging circuit of this utility model's multi-compartment battery swapping cabinet achieves external battery balancing through intelligent charging and discharging management at the swapping cabinet end. This innovative technical approach successfully avoids the expensive bidirectional BUCK-BOOST circuit, offering significant cost and performance advantages.

[0028] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any modifications, equivalent substitutions and improvements made within the concept of the present utility model should be included within the patent protection scope of the present utility model.

Claims

1. A battery charging and discharging circuit for a multi-compartment battery swapping cabinet, characterized in that, It includes an AC-to-DC input circuit, a first channel circuit, a second channel circuit, other channel circuits, and an MCU circuit. The first channel circuit, the second channel circuit, and other channel circuits are respectively connected to the AC-to-DC input circuit, and the first channel circuit and the second channel circuit are respectively connected to the MCU circuit. The first channel circuit includes a driving circuit A, and the second channel circuit includes a driving circuit B. The driving circuit A and the driving circuit B are respectively connected to the MCU circuit.

2. The battery charging and discharging circuit of the multi-compartment battery swapping cabinet as described in claim 1, characterized in that, The AC-to-DC input circuit includes an AC / DC module and a filter capacitor C1. The first channel circuit includes a switch Q1, and the second channel circuit includes a switch Q3. The output terminal of the AC / DC module is connected to the filter capacitor C1, the switch Q1, the switch Q3, and other channel circuits, respectively.

3. The battery charging and discharging circuit of the multi-compartment battery swapping cabinet as described in claim 2, characterized in that, The switching transistor Q1 is connected to the driving circuit A, and the switching transistor Q3 is connected to the driving circuit B.

4. The battery charging and discharging circuit of the multi-compartment battery swapping cabinet as described in claim 2, characterized in that, The positive AC / DC output voltage of the AC / DC module is connected to pin 1 of the filter capacitor C1, the drain of the switching transistor Q1, the drain of the switching transistor Q3, and other channel circuits. Pin 2 of the filter capacitor C1 is connected to SGND.

5. The battery charging and discharging circuit of the multi-compartment battery swapping cabinet as described in claim 2, characterized in that, The first channel circuit also includes a switching transistor Q2, a power inductor L1, and an output filter capacitor C2. The gate (G) pin of the switching transistor Q1 is connected to the drive circuit A. The source (S) terminal of the switching transistor Q1 is connected to the gate (1) pin of the power inductor L1 and the drain (D) terminal of the switching transistor Q2. The gate (G) pin of the switching transistor Q2 is connected to the drive circuit A. The source (S) pin of the switching transistor Q2 is connected to SGND. The gate (2) pin of the power inductor L1 and the gate (1) pin of the output filter capacitor C2 are connected to the positive output BAT-1. The gate (2) pin of the output filter capacitor C2 is connected to SGND.

6. The battery charging and discharging circuit of the multi-compartment battery swapping cabinet as described in claim 2, characterized in that, The second channel circuit also includes a switching transistor Q4, a power inductor L2, and an output filter capacitor C3. The gate (G) pin of the switching transistor Q3 is connected to the drive circuit B. The source (S) terminal of the switching transistor Q3 is connected to the gate (1) pin of the power inductor L2 and the drain (D) terminal of the switching transistor Q4. The gate (G) pin of the switching transistor Q4 is connected to the drive circuit B. The source (S) pin of the switching transistor Q4 is connected to SGND. The gate (2) pin of the power inductor L2 and the gate (1) pin of the output filter capacitor C3 are connected to the output BAT-2. The gate (2) pin of the output filter capacitor C3 is connected to SGND.

7. The battery charging and discharging circuit of the multi-compartment battery swapping cabinet as described in claim 4, characterized in that, The other channel circuits include the third to Nth channel circuits, with one end of each channel circuit connected to an AC / DC output and the other end connected to a power output.

8. The battery charging and discharging circuit of the multi-compartment battery swapping cabinet as described in claim 1, characterized in that, One output pin PWM-1H of the MCU circuit is connected to drive circuit A, one output pin PWM-1L is connected to drive circuit A, one output pin PWM-2H is connected to drive circuit B, and one output pin PWM-2L is connected to drive circuit B.

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