Energy-saving battery aging test equipment system

Abstract

The utility model relates to the technical field of battery testing, in particular to an energy-saving battery aging test equipment system, which comprises an equipment aging test step control module, energy-saving feedback aging equipment, a charging and discharging cabinet A, a charging and discharging cabinet B and a battery pack, the energy-saving feedback aging equipment comprises an electric energy conversion module and a power grid connection module, the electric energy conversion module is connected with the power grid connection module, and the power grid connection module supplies power through a mains supply power grid and converts the power into electric energy; the charging and discharging cabinet A and the charging and discharging cabinet B comprise charging and discharging modules which are connected with the electric energy conversion module and the battery pack; and the battery pack is connected with the equipment aging test step control module and is connected with the charging and discharging module. According to the utility model, collaborative optimization of charging and discharging steps and energy recycling are realized, and energy conservation and consumption reduction are realized.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to an energy-saving battery aging test equipment system. Background Technology

[0002] In the battery pack cycle test, aging battery testing is a key step to ensure stable battery performance. In traditional aging test solutions, the charging and discharging process relies entirely on mains power. The simultaneous charging or discharging of multiple aging cabinets leads to high energy consumption, and electricity costs account for a large proportion of production costs. Electricity costs account for 80% of the total electricity costs during the aging battery testing phase. Furthermore, the electrical energy generated during the discharge process is not effectively recovered and utilized, resulting in energy waste.

[0003] Chinese Patent Publication No. CN112769207B discloses a lithium battery capacity energy recovery system for aging testing of solar streetlights. The system includes a battery under test, an energy recovery battery, an MPPT charge / discharge control circuit, a power supply circuit, an operational amplifier circuit, a MOSFET driver module, and an MCU module. The battery under test is connected to the power supply circuit; the battery under test is connected to the MPPT charge / discharge control circuit; the battery under test is connected to the operational amplifier circuit; the MOSFET driver module is connected to the MPPT charge / discharge control circuit, and the MPPT charge / discharge control circuit is connected to the energy recovery battery; the MCU module is connected to the MOSFET driver module; the operational amplifier circuit is connected to the MCU module; both the MOSFET driver module and the MCU module are powered by the power supply circuit. Therefore, this solution cannot achieve coordinated optimization of the charging and discharging steps and energy recycling, resulting in energy waste, increased mains power consumption, and consequently, increased electricity costs. Utility Model Content

[0004] The purpose of this invention is to provide an energy-saving battery aging test equipment system that solves the problems of existing technologies, such as the inability to achieve coordinated optimization of charging and discharging steps and energy recycling, increased mains power consumption, and increased electricity costs.

[0005] To achieve the above objectives, this utility model provides an energy-saving battery aging test equipment system, including an equipment aging test step control module, an energy-saving feedback aging device, a charge / discharge cabinet A, a charge / discharge cabinet B, and a battery pack. The equipment aging test step control module is connected to the energy-saving feedback aging device and is used to send AC charging signals or discharging signals to the energy-saving feedback aging device, synchronize the charging / discharging rectification timing of charge / discharge A and charge / discharge B, and is also connected to the battery pack to send test commands to the battery pack.

[0006] The energy-saving feedback aging device is used for charge-discharge cycle testing of battery packs, and includes a power conversion module and a grid connection module; the power conversion module is connected to the grid connection module and is used to output AC charging signals or discharging signals; the grid connection module is powered by the mains power grid and converted into electrical energy.

[0007] The charging and discharging cabinet A and charging and discharging cabinet B include a charging and discharging module, which is connected to the power conversion module to receive AC charging signals or discharging signals, and is also connected to the battery pack to transmit power to the battery pack.

[0008] The battery pack is connected to the device aging test step control module to receive test commands, and is also connected to the charge and discharge module to perform charge and discharge cycle tests and store electrical energy.

[0009] Furthermore, the equipment aging test step control module includes a step synchronization control unit and a dynamic matching unit. The step synchronization control unit is connected to the energy-saving feedback aging equipment and is used to coordinate the rectification timing of charge and discharge cabinet A and charge and discharge cabinet B. The dynamic matching unit is also connected to the battery pack and is used to send charge and discharge power adjustment commands to the battery pack.

[0010] Furthermore, the power conversion module also includes a bidirectional inverter, which is connected to the grid connection module. This bidirectional inverter converts the DC power used for battery discharge into AC power for charging the mains grid, supplying it to the charging / discharging cabinet A. Simultaneously, it works with the step synchronization control unit to switch the charging / discharging mode of the charging / discharging module. Furthermore, the grid connection module includes a filter circuit. One end of the filter circuit is connected to the bidirectional inverter to purify the AC power used for bidirectional inverter discharge, and the other end is connected to the mains grid to filter out harmonics in the power supply.

[0011] Furthermore, the charging and discharging module includes a synchronous rectification unit, one end of which is connected to the step synchronization control unit for controlling the rectification timing, and the other end is connected to the battery pack for converting the DC power from the battery pack into the AC power required for charging and discharging cycle testing.

[0012] Furthermore, the battery pack also includes a thermal management system unit, one end of which is connected to a synchronous rectification unit for receiving the charging AC power to charge the charging and discharging cabinet B, and the other end is connected to a step synchronization control unit for executing charging and discharging power adjustment commands.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In this invention, through the equipment aging test step control module, energy-saving feedback aging equipment, and the coordinated mechanism of alternating charging and discharging of charging and discharging cabinet A and charging and discharging cabinet B, the discharge energy is converted and mutually supplied, realizing the coordinated optimization of the charging and discharging steps and the recycling of energy, improving test efficiency. The battery pack realizes charge and discharge cycle testing and energy storage, and the bidirectional inverter replaces the resistive load, thereby achieving an energy recovery rate of 80%-90%, further improving energy efficiency, saving energy and reducing consumption, and thus reducing the amount of electricity drawn from the power grid. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the energy-saving battery aging test equipment system structure in this embodiment;

[0016] Figure 2 This is a schematic diagram of the energy feedback system structure of the energy-saving battery aging test equipment in this embodiment. Detailed Implementation

[0017] To make the objectives and advantages of this utility model clearer, the present invention will be further described below with reference to the embodiments; it should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0018] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Please see Figure 1 The diagram shows the structure of the energy-saving battery aging test equipment system of this utility model. The energy-saving battery aging test equipment system includes an equipment aging test step control module, an energy-saving feedback aging device, a charge / discharge cabinet A, a charge / discharge cabinet B, and a battery pack. The equipment aging test step control module is connected to the energy-saving feedback aging device and is used to send AC charging signals or discharging signals to the energy-saving feedback aging device and synchronize the charging / discharging rectification timing of charge / discharge A and charge / discharge B. It is also connected to the battery pack and is used to send test commands to the battery pack.

[0021] The energy-saving feedback aging device is used for charge-discharge cycle testing of battery packs. It includes a power conversion module and a grid connection module. The power conversion module is used to output AC charging or discharging signals. The power conversion module is connected to the grid connection module, which is powered by the mains power grid and converted into electrical energy.

[0022] The charging and discharging cabinet A and charging and discharging cabinet B include a charging and discharging module, which is connected to the power conversion module and is used to receive AC charging signals or discharging signals. They are also connected to the battery pack and are used to transmit power to the battery pack.

[0023] The battery pack is connected to the device aging test step control module to receive test commands and is connected to the charge and discharge module to perform charge and discharge cycle tests and store electrical energy.

[0024] Specifically, this utility model does not limit the connection method of the energy-saving battery aging test equipment system. Those skilled in the art can freely set it according to the actual situation, as long as it meets the requirements of coordinated optimization of the charging and discharging steps and energy recycling. For example, the connection method of the energy-saving battery aging test equipment system can be set as a physical connection. The energy-saving battery aging test equipment system, through the equipment aging test step control module, energy-saving feedback aging equipment, and the coordinated mechanism of alternating charging and discharging of charging and discharging cabinet A and charging and discharging cabinet B, enables the discharge energy to be mutually supplied after conversion, thereby realizing the coordinated optimization of the charging and discharging steps and energy recycling, improving test efficiency. By performing charge and discharge cycle testing and energy storage through the battery pack, and using a bidirectional inverter to replace the resistive load, the energy recovery rate reaches 80%-90%, further improving energy efficiency, saving energy and reducing consumption, thereby reducing the amount of electricity drawn from the grid and extending battery life.

[0025] Specifically, the equipment aging test step control module includes a step synchronization control unit and a dynamic matching unit. The step synchronization control unit is connected to the energy-saving feedback aging equipment and is used to coordinate the rectification timing of charge-discharge cabinet A and charge-discharge cabinet B, and to synchronize the resting time of charge-discharge cabinet A and charge-discharge cabinet B in the charge-discharge circuit. The dynamic matching unit is also connected to the battery pack and is used to send charge-discharge power adjustment commands to the battery pack.

[0026] The equipment aging test step control module, through the coordinated action of the step synchronization control unit and the dynamic matching unit, achieves precise control of the rectifier switching sequence of charge and discharge cabinet A and charge and discharge cabinet B, dynamically adjusts the charging and discharging power, reduces equipment conflicts, and improves battery testing efficiency and system stability.

[0027] Combination Figure 1 and Figure 2The power conversion module includes a bidirectional inverter connected to the grid connection module. It inverts the DC power used for battery discharge into AC power for charging and discharging, feeding it back to the mains grid to charge charging and discharging cabinet A. Simultaneously, it is connected to the step synchronization control unit to switch the charging and discharging modes of the charging and discharging module. The bidirectional inverter includes a bidirectional DC-AC inverter and a bidirectional DC-DC converter. One end is connected to charging and discharging cabinet A, and the bidirectional DC-AC inverter transfers the energy discharged from charging and discharging cabinet A to charging and discharging cabinet B and charging the battery pack. The other end is connected to charging and discharging cabinet B to receive the energy discharged from charging and discharging cabinet A. Charging and discharging cabinet B directly transfers the discharge energy to the charging battery pack through the bidirectional DC-DC converter.

[0028] Specifically, the power conversion module achieves efficient energy interaction between the power grid and the equipment through a bidirectional DC-AC inverter, a bidirectional DC-DC converter, and step-by-step synchronous control, thereby improving the efficiency of direct charging and discharging and optimizing the flexibility of the cyclic testing process.

[0029] Specifically, the grid connection module includes a filter circuit. One end of the filter circuit is connected to the bidirectional inverter to purify the AC power discharged by the bidirectional inverter, and the other end is connected to the mains power grid to filter out the harmonics of the electrical energy.

[0030] Specifically, the grid connection module uses inverter-side purification and filter circuits to suppress high-frequency harmonic interference, ensuring grid and equipment safety, reducing equipment temperature rise, improving inverter efficiency, and extending equipment life.

[0031] Specifically, the charging / discharging cabinets A and B include charging / discharging modules, each including a synchronous rectification unit. One end of the synchronous rectification unit is connected to the step synchronization control unit to control the rectification timing. The charging / discharging cabinet A converts the energy discharged by itself into AC power that is in phase and frequency with the grid, feeding it back to the mains grid via the bidirectional DC-AC inverter. The mains grid then transfers the AC power to charge the charging / discharging cabinet B. The charging / discharging cabinet B feeds the power back to the mains grid via the power conversion module. The bidirectional DC-DC converter converts the mains grid power into AC power that is compatible with the grid, charging the charging / discharging cabinet A and forming an internal energy cycle. The other end of the converter is connected to the battery pack to convert the DC power from the battery pack into the AC power required for charging / discharging cycle testing.

[0032] Specifically, the charging and discharging module achieves bidirectional energy recycling and interaction with the power grid through a synchronous rectification unit and a bidirectional inverter, thereby improving internal energy recycling efficiency, rectification timing accuracy, and power quality, thus reducing mains power consumption and electricity costs.

[0033] Specifically, the battery pack also includes a thermal management system unit. One end of the thermal management system unit is connected to the synchronous rectification unit, which is used to receive the charging AC power to charge the charging and discharging cabinet B, use the heat generated by the discharge to preheat the battery under test through a heat exchanger, and use liquid cooling cycle to control the temperature rise during charging. The other end is connected to the step synchronization control unit, which is used to execute charging and discharging power adjustment commands.

[0034] Specifically, the thermal management system unit realizes heat recovery and dynamic power regulation through a heat exchanger and a step synchronization control unit, ensuring the reliability of test data and extending the battery cycle test life.

[0035] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An energy-saving battery aging test equipment system, comprising an equipment aging test step control module, an energy-saving feedback aging device, a charge / discharge cabinet A, a charge / discharge cabinet B, and a battery pack, characterized in that, The device aging test step control module is connected to the energy-saving feedback aging device and is used to send AC charging signals or discharging signals to the energy-saving feedback aging device, synchronize the charging and discharging rectification timing of charging and discharging A and charging and discharging B, and is also connected to the battery pack to send test commands to the battery pack. The energy-saving feedback aging device is used for charge-discharge cycle testing of battery packs, and includes a power conversion module and a grid connection module; the power conversion module is connected to the grid connection module and is used to output AC charging signals or discharging signals; the grid connection module is powered by the mains power grid and converted into electrical energy. The charging and discharging cabinet A and charging and discharging cabinet B include a charging and discharging module, which is connected to the power conversion module to receive AC charging signals or discharging signals, and is also connected to the battery pack to transmit power to the battery pack. The battery pack is connected to the device aging test step control module to receive test commands, and is also connected to the charge and discharge module to perform charge and discharge cycle tests and store electrical energy.

2. The energy-saving battery aging test equipment system according to claim 1, characterized in that, The equipment aging test step control module includes a step synchronization control unit and a dynamic matching unit. The step synchronization control unit is connected to the energy-saving feedback aging equipment and is used to coordinate the rectification timing of charge and discharge cabinet A and charge and discharge cabinet B. The dynamic matching unit is also connected to the battery pack and is used to send charge and discharge power adjustment commands to the battery pack.

3. The energy-saving battery aging test equipment system according to claim 1, characterized in that, The power conversion module also includes a bidirectional inverter, which is connected to the grid connection module. The bidirectional inverter is used to invert the DC power used for battery discharge into AC power used for discharge and feed it back to the mains power grid to charge the charging and discharging cabinet A. At the same time, it is used to switch the charging and discharging modes of the charging and discharging module with the step synchronization control unit.

4. The energy-saving battery aging test equipment system according to claim 3, characterized in that, The grid connection module includes a filter circuit. One end of the filter circuit is connected to the bidirectional inverter to purify the AC power discharged by the bidirectional inverter, and the other end is connected to the mains power grid to filter out the harmonics of the electrical energy.

5. The energy-saving battery aging test equipment system according to claim 1, characterized in that, The charging and discharging module includes a synchronous rectification unit. One end of the synchronous rectification unit is connected to the step synchronization control unit to control the rectification timing, and the other end is connected to the battery pack to convert the DC power from the battery pack into the AC power required for charging and discharging cycle testing.

6. The energy-saving battery aging test equipment system according to claim 5, characterized in that, The battery pack also includes a thermal management system unit. One end of the thermal management system unit is connected to the synchronous rectification unit for receiving the charging AC power to charge the charging and discharging cabinet B, and the other end is connected to the step synchronization control unit for executing charging and discharging power adjustment commands.

Images