Battery series-parallel system and series-parallel control method thereof

Abstract

The invention discloses a battery series-parallel system and a series-parallel control method thereof, and the series-parallel system comprises a plurality of battery packs; the series-parallel wire group is connected with the battery packs and is used for connecting the multiple battery packs in series or in parallel; and the controller is communicated with the serial-parallel wire group, is used for controlling serial connection or parallel connection of the battery pack, and is communicated with the direct current charging equipment and the output motor based on a CAN bus and a wireless communication protocol. According to the invention, the parallel wire groups are designed and controlled by the controller, when the battery packs provide power for the output motor, the controller controls the series switch to be switched on and the parallel switch to be switched on, so that the multiple battery packs are connected in parallel, the multiple battery packs are configured to be connected in parallel in daily use, and 48 / 60 / 72V voltage is provided to drive equipment; when the charging equipment charges the battery packs, the controller controls the series switch to be switched on and the parallel switch to be switched off, so that the multiple battery packs are connected in series, and the battery packs are automatically switched to be connected in series during charging so as to adapt to 240 / 288 / 480V direct-current high-voltage charging.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery series-parallel system and a series-parallel control method thereof. Background Art

[0002] With the vigorous development of the energy industry, the number of devices powered by new energy is increasing; However, as a commonly used power battery pack for new energy, it often faces the problem of long charging time, especially when using non-dedicated charging piles. Summary of the invention

[0003] Purpose of the invention: To provide a battery series-parallel system and a series-parallel control method thereof to solve the above-mentioned problems existing in the prior art.

[0004] Technical solution: A battery series-parallel system, including: Battery pack, design multiple packs; A series-parallel line group, connected to the battery group, is used to connect multiple battery groups in series or in parallel; The controller is connected to the series-parallel line group and is used to control the series or parallel connection of the battery pack and communicate with the DC charging device and the output motor based on the CAN bus and wireless communication protocol.

[0005] The present invention designs a parallel line group and controls it through a controller. When the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that multiple battery packs are connected in parallel. Multiple battery packs are configured to be connected in parallel in daily use to provide 48 / 60 / 72V voltage to drive the device. When the charging device charges the battery pack, the controller controls the series switch to open and the parallel switch to close, so that multiple battery packs are connected in series. During charging, the battery pack automatically switches to a series configuration to adapt to 240 / 288 / 480V DC high-voltage charging.

[0006] In a further embodiment, the series-parallel line group comprises: A series line group, multiple groups are designed, connected to the battery group, and used to connect the multiple battery groups in series, each group includes a series line, and a series switch arranged on the series line to control the on and off of the series line; The parallel line groups are designed in multiple groups and connected to the battery groups for connecting the multiple battery groups in parallel. Each group includes a parallel line and a parallel switch arranged on the parallel line for controlling the on and off of the parallel line.

[0007] In a further embodiment, the controller is connected to the series switch and the parallel switch to control the opening and closing of the series switch and the parallel switch.

[0008] In a further embodiment, when the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that the multiple battery packs are connected in parallel; When the charging device charges the battery pack, the controller controls the series switch to open and the parallel switch to close, so that the multiple battery packs are connected in series.

[0009] In a further embodiment, the controller has a built-in sensor and adapter for identifying the type of the connected charging device.

[0010] The controller has a built-in safety monitoring system that can automatically take protective measures when the battery status is abnormal.

[0011] The controller includes a fault detection function that can notify the user and take appropriate action when a fault is detected.

[0012] A battery series-parallel control method, comprising: Step 1, discharge mode, when the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that multiple battery packs are connected in parallel; Step 2, charging mode, when the charging device is charging the battery pack, the controller controls the series switch to open and the parallel switch to close, so that the multiple battery packs are connected in series; When the battery pack is charging, the sensor and adapter identify the type of connected charging device.

[0013] Beneficial effects: The present invention discloses a battery series-parallel system and a series-parallel control method thereof. The present invention designs a parallel line group and controls it through a controller. When the battery group provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that multiple battery groups are connected in parallel. Multiple battery groups are configured to be connected in parallel in daily use to provide 48 / 60 / 72V voltage to drive the device; When the charging device charges the battery pack, the controller controls the series switch to open and the parallel switch to close, so that multiple battery packs are connected in series. During charging, the battery pack automatically switches to a series configuration to adapt to 240 / 288 / 480V DC high-voltage charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the series-parallel line group of the present invention.

[0016] Figure 3 It is a schematic flow chart of the method of the present invention. DETAILED DESCRIPTION

[0017] The present application relates to a battery series-parallel system and a series-parallel control method thereof, which will be explained in detail through specific implementation methods below.

[0018] A battery series-parallel system, comprising: Battery pack, design multiple packs; A series-parallel line group, connected to the battery group, is used to connect multiple battery groups in series or in parallel; The controller is connected to the series-parallel line group and is used to control the series or parallel connection of the battery pack and communicate with the DC charging device and the output motor based on the CAN bus and wireless communication protocol.

[0019] In a further embodiment, the series-parallel line group comprises: A series line group, multiple groups are designed, connected to the battery group, and used to connect the multiple battery groups in series, each group includes a series line, and a series switch arranged on the series line to control the on and off of the series line; The parallel line groups are designed in multiple groups and connected to the battery groups for connecting the multiple battery groups in parallel. Each group includes a parallel line and a parallel switch arranged on the parallel line for controlling the on and off of the parallel line.

[0020] In a further embodiment, the controller is connected to the series switch and the parallel switch to control the opening and closing of the series switch and the parallel switch.

[0021] In a further embodiment, it is characterized in that: When the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that the multiple battery packs are connected in parallel; When the charging device charges the battery pack, the controller controls the series switch to open and the parallel switch to close, so that the multiple battery packs are connected in series.

[0022] In a further embodiment, the controller has a built-in sensor and adapter for identifying the type of the connected charging device.

[0023] The controller has a built-in safety monitoring system that can automatically take protective measures when the battery status is abnormal.

[0024] The controller includes a fault detection function that can notify the user and take appropriate action when a fault is detected.

[0025] A battery series-parallel control method, comprising: Step 1, discharge mode, when the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that multiple battery packs are connected in parallel; Step 2, charging mode, when the charging device is charging the battery pack, the controller controls the series switch to open and the parallel switch to close, so that the multiple battery packs are connected in series; When the battery pack is charging, the sensor and adapter identify the type of connected charging device.

[0026] Working principle description: In discharge mode, when the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that multiple battery packs are connected in parallel; In charging mode, when the charging device is charging the battery pack, the controller controls the series switch to open and the parallel switch to close, so that multiple battery packs are connected in series; When the battery pack is charging, the sensor and adapter identify the type of connected charging device.

[0027] The preferred specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above specific embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A battery series-parallel system, characterized in that: include: Battery pack, design multiple packs; A series-parallel line group, connected to the battery group, is used to connect multiple battery groups in series or in parallel; The controller is connected to the series-parallel line group and is used to control the series or parallel connection of the battery pack and communicate with the DC charging device and the output motor based on the CAN bus and wireless communication protocol.

2. A battery series-parallel system according to claim 1, characterized in that: The series-parallel line group comprises: A series line group, multiple groups are designed, connected to the battery group, and used to connect the multiple battery groups in series, each group includes a series line, and a series switch arranged on the series line to control the on and off of the series line; The parallel line groups are designed in multiple groups and connected to the battery groups for connecting the multiple battery groups in parallel. Each group includes a parallel line and a parallel switch arranged on the parallel line for controlling the on and off of the parallel line.

3. A battery series-parallel system according to claim 1, characterized in that: The controller is connected to the series switch and the parallel switch and is used to control the opening and closing of the series switch and the parallel switch.

4. A battery series-parallel system according to claim 1, characterized in that: When the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that the multiple battery packs are connected in parallel; When the charging device charges the battery pack, the controller controls the series switch to open and the parallel switch to close, so that the multiple battery packs are connected in series.

5. The battery series-parallel system according to claim 1, characterized in that: The controller has built-in sensors and adapters for identifying the type of connected charging equipment.

6. A battery series-parallel control method, implemented based on the battery series-parallel system according to any one of claims 1 to 5, characterized in that: include: Step 1, discharge mode, when the battery pack provides power to the output motor, the controller controls the series switch to close and the parallel switch to open, so that multiple battery packs are connected in parallel; Step 2, charging mode, when the charging device is charging the battery pack, the controller controls the series switch to open and the parallel switch to close, so that the multiple battery packs are connected in series; When the battery pack is charging, the sensor and adapter identify the type of connected charging device.

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