Battery charging and discharging equipment
By designing a battery charging and discharging device for charging between battery packs, using a boost module and a supplementary module, combined with the control of a programmable logic controller and a contactor, the problems of power waste and energy loss in the prior art are solved, and the battery charging and discharging effect is achieved efficient and energy-saving and environmentally friendly.
Patent Information
- Application Number
- CN202510149038.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-04-18
AI Technical Summary
When an existing battery charging and discharging device is discharged, the lack of a rechargeable battery pack leads to waste of electricity and energy loss. Especially on factory production lines, there are fewer battery packs charged and discharged, making it difficult to achieve efficient energy saving.
A battery charging and discharging device is designed, including a mutual charging function between the first battery pack and the second battery pack, and efficient recycling and reuse of electric energy is achieved through a boost module and a supplementary module. The control module realizes switching of charge and discharge modes and monitoring of the battery pack through programmable logic controllers and contactors.
It realizes efficient mutual charging between battery packs, significantly improves energy saving efficiency, reduces dependence on the power grid, reduces energy loss, and supports a variety of renewable energy sources to recharge power, enhancing the flexibility and environmental friendliness of the system.
Smart Images
Figure CN119853220A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of batteries, and in particular to a battery charging and discharging device and method. Background Art
[0002] During the production process, batteries need charging and discharging equipment to charge and discharge the batteries for activation, capacity division and classification. When the batteries are discharged, the discharged electricity is wasted, and part of the electricity of the discharge equipment is also consumed. To address this situation, someone has designed a battery charging and discharging equipment with energy feedback, which can theoretically save 60% of electricity. Figure 1 The schematic diagram of the battery charging and discharging device provided by the prior art is shown in the figure: it includes a plurality of battery cells A and a corresponding number of bidirectional DC-DC converters, the battery cells A are connected to the DC bus AC / DC through the bidirectional DC-DC converter 100, and also includes a control unit battery B and a touch screen controller. The charging and discharging states of the battery cells A are different, some are in the discharging state, and some are in the charging state. The electric energy released by the battery cells A that need to be discharged is fed back to the DC bus AC / DC through the bidirectional DC-DC converter; at the same time, the battery cells A that need to be charged obtain electric energy from the DC bus AC / DC through the bidirectional DC-DC converter 100. The above scheme requires that when a battery cell A is discharged, there must be another battery cell A that needs to be charged at the same time, otherwise, in order to keep the voltage on the DC bus AC / DC stable, the electricity discharged by the discharged battery cell A must be consumed in time through the load. It should be noted here that it is not allowed to feed back the electricity discharged by the discharged battery cell A to the power grid through the DC-AC converter, which will pollute the power grid.
[0003] In a factory, there are usually many battery packs charging and discharging on the production line. The energy saving rate of the above scheme is close to the theoretical value and is more applicable. However, there are often fewer battery packs being charged and discharged. It is difficult to ensure that when one battery pack is discharging, another battery pack needs to be charged. Therefore, the electricity discharged by the battery pack needs to be consumed by the load, so the energy saving rate is relatively low.
[0004] In order to solve the above defects, a battery charging and discharging device is now provided to achieve the purpose of high energy saving efficiency. Summary of the invention
[0005] The object of the present invention is to provide a battery charging and discharging device.
[0006] The purpose of the present invention can be achieved through the following technical solution: A battery charging and discharging device, comprising: a first battery group and a second battery group, wherein the first battery group and the second battery group charge and discharge each other; A boost module, wherein the boost component is electrically connected between the first battery pack and the second battery pack, and the boost component is composed of two DC / DC boost boards connected in parallel. A power replenishment module, wherein the power replenishment module draws power from a power grid or an energy storage device, and the power replenishment module is electrically connected to the first battery pack and the second battery pack respectively; Control module; the control module is used to realize the charging and discharging between the first battery pack and the second battery pack.
[0007] As a preferred solution of the present invention, the first battery group and the second battery group are mutually discharging and charging battery groups. When the energy of the first battery group or the second battery group is insufficient to complete the mutual charging process, the power replenishment module will obtain additional energy from the power grid or the energy storage device, and then replenish it to the first battery group or the second battery group.
[0008] As a preferred solution of the present invention, the DC / DC boost board is a unidirectional booster.
[0009] As a preferred solution of the present invention, the control module realizes the switching of the charge and discharge mode through a programmable logic controller. When the first battery pack is discharging, the programmable logic controller controls the DC / DC boost board to transfer electric energy to the second battery pack for charging; when the second battery pack is discharging, the programmable logic controller controls the DC / DC boost board to transfer electric energy to the first battery pack for charging.
[0010] As a preferred solution of the present invention, the control module connects the circuit by controlling the contactor so that the discharge battery pack is connected to the low voltage side of the DC / DC boost board, and the charge battery pack is connected to the high voltage side of the DC / DC boost board.
[0011] As a preferred solution of the present invention, under the condition that the first battery pack and the second battery pack are mutually charged, the control module continuously monitors parameters such as voltage, current and temperature of the first battery pack and the second battery pack.
[0012] As a preferred solution of the present invention, the energy storage device is a battery capable of storing energy, and the energy storage device obtains electrical energy from an external power source such as an AC power grid, wind energy, solar energy or a generator.
[0013] As a preferred solution of the present invention, when the battery charging and discharging device discharges the first battery group and charges the second battery group, the control module controls the contactors KM1 and KM2 to be closed, so that the first battery group of the discharge device is input from the VL side of the DC / DC boost board and output from the VH side of the DC / DC boost board, so as to realize the charging of the second battery group by the first battery group, and at the same time, the contactor KM5 is closed, and the second battery group is supplemented with power by the power replenishment module; when the second battery group of the battery charging and discharging device discharges and charges the first battery group, the PLC controls the contactors KM3 and KM4 to be closed, so that the second battery group of the discharge device is input from the VL side of the DC / DC boost board and output from the VH side of the DC / DC boost board, so as to realize the charging of the first battery group by the second battery group, and at the same time, the contactors KM6 and KM7 are closed, and the first battery group is supplemented with power by the power replenishment module.
[0014] Beneficial effects of the present invention: The battery charging and discharging equipment has a significant energy-saving effect. Through direct mutual charging between battery packs, it realizes efficient recovery and reuse of discharged energy. The mutual charging process is completely independent of the 220Vac AC power grid, reducing dependence on the power grid, further reducing energy loss, and avoiding the impact of power grid fluctuations on the charging and discharging process. At the same time, it supports wind energy, solar energy and other renewable energy sources to supplement electricity, enhancing the flexibility and environmental friendliness of the system. The DC / DC boost board it uses increases the voltage of the discharge battery pack to ensure efficient transmission of electric energy to the charging battery pack, reduces energy loss caused by voltage mismatch, and further improves charging efficiency. The power supplement module can obtain energy from the power grid or energy storage device as needed to supplement the energy loss during the mutual charging process, ensuring the stability and efficiency of the charging process. In addition, the control module realizes the switching of charging and discharging modes through PLC, and continuously monitors parameters such as voltage, current and temperature of the battery pack to ensure the safety and stability of the charging and discharging process. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be further described below in conjunction with the accompanying drawings.
[0016] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 The principle of the present invention Figure 1 ; Figure 3 The principle of the present invention Figure 2 ; Figure 4 is a line graph of energy efficiency of two groups of batteries of the present invention; Figure 5 is the controller wiring diagram of the present invention; Figure 6 It is a system schematic diagram of the present invention. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example
[0018] See also Figure 1 As shown, the present invention is a battery charging and discharging device, which is used for mutual charging and discharging of a first battery group and a second battery group, and includes a first battery group and a second battery group, a boost module, a power replenishment module, and a control module. The boost component is electrically connected between the first battery group and the second battery group, and the boost component is composed of two DC / DC boost boards in parallel, which are used to transfer electric energy between the battery groups. The power replenishment module draws electricity from the power grid or the energy storage device to supplement the insufficient energy in the mutual charging process. The power replenishment module is electrically connected to the first battery group and the second battery group respectively. The power replenishment module can not only draw electricity from the power grid, but also be connected to wind energy, solar energy, small hydropower or other renewable energy sources. The control module is used to realize the charging and discharging between the first battery group and the second battery group, and control the charging and discharging process between the battery groups.
[0019] Specifically, under the condition that the first battery group and the second battery group are mutually charged, the control module continuously monitors parameters such as the voltage, current and temperature of the first battery group and the second battery group, the energy storage device is a battery capable of storing energy, and the energy storage device obtains electrical energy from an external power source such as an AC power grid, wind energy, solar energy or a generator.
[0020] Among them, the first battery group and the second battery group can be charged and discharged by each other. When the energy of the first battery group or the second battery group is insufficient to complete the mutual charging process, the power supplement module will obtain additional energy from the power grid or the energy storage device, and then supplement it to the first battery group or the second battery group. The DC / DC boost board is a unidirectional booster, so that the electric energy can only flow from the low-voltage side to the high-voltage side. The control module connects the circuit by controlling the contactor so that the discharge battery group is connected to the low-voltage side of the DC / DC boost board, and the charging battery group is connected to the high-voltage side of the DC / DC boost board. By controlling the contactor to be attracted, the connection between the battery group and the boost board is realized, thereby controlling the charging and discharging path.
[0021] In this embodiment, the control module realizes the switching of the charging and discharging mode through the programmable logic controller. When the first battery pack is discharging, the programmable logic controller controls the DC / DC boost board to transfer the electric energy to the second battery pack for charging; when the second battery pack is discharging, the programmable logic controller controls the DC / DC boost board to transfer the electric energy to the first battery pack for charging. The programmable logic controller is used to realize the switching of the charging and discharging mode, and controls the working direction of the boost board according to the state of the battery pack. The control module will continuously monitor the parameters such as the voltage, current and temperature of the battery pack to ensure the safety of the charging and discharging process.
[0022] This embodiment also provides a mutual charging method between battery packs, that is, a working method of the above device: S1. Connect battery A and battery B to the designated ports of the device respectively; S2. Check the initial status of the device through the control module, including whether the voltage, current, temperature and other parameters of the battery pack are normal, to ensure that the system is in a safe operating state; S3. Start the upper computer monitoring system to display the equipment status and parameters in real time, providing intuitive operation information for operators; S4, when battery A is discharging and battery B is charging, the control module controls the contactors KM1 and KM2 to close, so that the discharge device is connected. When battery A is input from the VL side of the DC / DC boost board and output from the VH side of the DC / DC boost board, if battery B is insufficient during charging, the PLC controls the contactor KM5 to close, and the power replenishment module draws power from the grid or energy storage device to replenish energy for battery B; S5. When battery B is discharging and battery A is charging, the control module controls the contactors KM3 and KM4 to connect battery B to the low-voltage side (VL side) of the DC / DC boost board, and battery A to the high-voltage side (VH side) of the DC / DC boost board. Battery B transfers electrical energy from the low-voltage side to the high-voltage side through the DC / DC boost board to charge battery A. If battery A is low on power during charging, the PLC controls the contactors KM6 and KM7 to close, and the power replenishment module draws power from the grid or energy storage device to replenish energy for battery A.
[0023] The battery charging and discharging equipment is used to charge and discharge between battery packs. The electricity discharged by the battery is greatly utilized, thereby achieving high energy-saving efficiency. The circuit for charging or discharging two battery packs is changed, and the structure is simple and the cost is low. The charging efficiency reaches more than 80%. The experimental results are summarized as follows:
[0024] Experimental conclusion: The normal operating efficiency of the system is generally in the range of 80% to 85%, and the battery mutual charging system can operate normally for a long time.
[0025] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.
Claims
1. A battery charging and discharging device, characterized in that: The device comprises: a first battery group and a second battery group, wherein the first battery group and the second battery group charge and discharge each other; A boost module, wherein the boost component is electrically connected between the first battery pack and the second battery pack, and the boost component is composed of two DC / DC boost boards connected in parallel. A power replenishment module, wherein the power replenishment module draws power from a power grid or an energy storage device, and the power replenishment module is electrically connected to the first battery pack and the second battery pack respectively; Control module; the control module is used to realize the charging and discharging between the first battery pack and the second battery pack.
2. A battery charging and discharging device according to claim 1, characterized in that: The first battery group and the second battery group are mutually discharging and charging battery groups. When the energy of the first battery group or the second battery group is insufficient to complete the mutual charging process, the power replenishment module will obtain additional energy from the power grid or the energy storage device, and then replenish it to the first battery group or the second battery group.
3. A battery charging and discharging device according to claim 1, characterized in that: The DC / DC boost board is a unidirectional booster.
4. A battery charging and discharging device according to claim 3, characterized in that: The control module realizes the switching of the charge and discharge mode through the programmable logic controller. When the first battery pack is discharging, the programmable logic controller controls the DC / DC boost board to transfer electric energy to the second battery pack for charging; when the second battery pack is discharging, the programmable logic controller controls the DC / DC boost board to transfer electric energy to the first battery pack for charging.
5. A battery charging and discharging device according to claim 2, characterized in that: The control module connects the circuit by controlling the contactor so that the discharge battery pack is connected to the low voltage side of the DC / DC boost board, and the charge battery pack is connected to the high voltage side of the DC / DC boost board.
6. A battery charging and discharging device according to claim 1, characterized in that: Under the condition that the first battery pack and the second battery pack are mutually charged, the control module continuously monitors parameters such as voltage, current and temperature of the first battery pack and the second battery pack.
7. A battery charging and discharging device according to claim 1, characterized in that: The energy storage device is a battery capable of storing energy, and the energy storage device obtains electrical energy from an external power source such as an AC power grid, wind energy, solar energy or a generator.
8. A battery pack mutual charging method applied to the battery charging and discharging device according to any one of claims 1 to 7, characterized in that: When the battery charging and discharging device discharges the first battery group and charges the second battery group, the control module controls the contactors KM1 and KM2 to be pulled in, so that the first battery group of the discharge device is input from the VL side of the DC / DC boost board and output from the VH side of the DC / DC boost board, so that the first battery group charges the second battery group, and at the same time, the contactor KM5 is pulled in, and the power replenishment module is used to replenish the power of the second battery group; When the second battery pack of the battery charging and discharging equipment discharges to charge the first battery pack, the control module controls the contactors KM3 and KM4 to be closed, so that the second battery pack of the discharge equipment is input from the VL side of the DC / DC boost board and output from the VH side of the DC / DC boost board, thereby realizing the charging of the first battery pack by the second battery pack. At the same time, the contactors KM6 and KM7 are closed, and the first battery pack is recharged using the recharge module.