Lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC

Abstract

The invention belongs to the field of lithium battery aging systems, and particularly relates to a lithium battery aging system based on wireless communication, an energy storage system and a bidirectional DCDC (direct current direct current), which consists of a central dispatching controller, an energy supplementing direct current power supply, a special energy storage lithium battery, an aging operation lithium battery, a bidirectional DC / DC module, a large-current direct current bus and wireless communication, the multi-path special energy storage lithium battery and the two-way DC / DC module form an energy storage system, efficient transmission and cyclic utilization of electric energy among different batteries are achieved through the two-way DC / DC, a complex AC conversion process is not needed, the problem that a power grid is polluted by harmonic current is avoided, and the charge dispute for feeding back the electric quantity of the power grid does not exist. Meanwhile, electric energy is stored and allocated through the energy storage system, a braking resistor discharging mode is replaced, waste of a large amount of heat energy is effectively avoided, the energy utilization efficiency is greatly improved, the operation cost and energy loss of enterprises are reduced, and the lithium battery aging process is more environmentally friendly, saves energy and is more efficient.

Description

Technical Field

[0001] The present invention belongs to the field of lithium battery aging system, in particular to a lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC. Background Art

[0002] Existing lithium battery aging systems usually use the AC-DC-DC-BAT mode for charging and BAT-DC-DC-AC for discharging, or use the brake resistor discharge in the BAT-DC-DC-R mode.

[0003] AC discharge easily generates harmonic currents that pollute the power grid, which requires approval from the power supply department. The amount of electricity fed back to the grid usually cannot be deducted from the electricity charges; the power consumption of the braking resistor will generate a lot of heat energy waste. Both modes waste energy for enterprises.

[0004] To this end, the present invention provides a lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC described in the present invention is characterized in that the lithium battery aging system is composed of a central dispatching controller, a replenishing DC power supply, a special energy storage lithium battery, an aging operation lithium battery, a bidirectional DC / DC module, a high-current DC bus and wireless communication, and multiple channels of special energy storage lithium batteries and bidirectional DC / DC modules constitute the energy storage system.

[0007] Preferably, the lithium battery and the bidirectional DC / DC module constitute an energy storage system as a charging and discharging device of the lithium battery aging system.

[0008] The beneficial effects of the present invention are as follows:

[0009] The lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC described in the present invention realizes efficient transmission and recycling of electric energy between different batteries through bidirectional DC / DC, without going through a complex AC conversion process, avoiding the problem of harmonic current polluting the power grid, and there is no dispute over the charge of electricity fed back to the power grid. At the same time, relying on the energy storage system to store and allocate electric energy, it replaces the brake resistor discharge mode, effectively avoids a large amount of heat energy waste, greatly improves energy utilization efficiency, reduces the operating cost and energy loss of the enterprise, and makes the lithium battery aging process more environmentally friendly, energy-saving and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below in conjunction with the accompanying drawings.

[0011] Figure 1 This is the architecture diagram of the lithium battery aging system in the present invention. DETAILED DESCRIPTION

[0012] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0013] like Figure 1 As shown, the lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC of the embodiment of the present invention is characterized in that the lithium battery aging system is composed of a central dispatching controller, a replenishing DC power supply, a special energy storage lithium battery, an aging operation lithium battery, a bidirectional DC / DC module, a large current DC bus and wireless communication. Multiple dedicated energy storage lithium batteries and bidirectional DC / DC modules constitute the energy storage system. The lithium battery and the bidirectional DC / DC module constitute the energy storage system as the charging and discharging device of the lithium battery aging system. Digital wireless communication technologies such as WiFi, zigbee, and Lora are used to collect the working data of each module of the system and schedule the working status of each module.

[0014] Working principle: The lithium battery aging system based on WiFi communication and bidirectional DC / DC can be used for system scheduling through WiFi communication, coordinate the bidirectional DC / DC working parameters of multiple DC buses and lithium batteries, transfer electric energy back and forth between different batteries, simplify system wiring, and reduce power loss during lithium battery aging test;

[0015] When the output power of the aged battery to be charged is greater than the output power of the aged battery to be discharged, a bidirectional DC / DC is used to discharge from the dedicated energy storage lithium battery to the DC bus to provide power for the rechargeable battery. The central dispatching controller obtains the charge and discharge status of all aged batteries through wireless communication, and automatically dispatches the number of dedicated energy storage lithium batteries to be discharged. When the output power of the energy storage battery is insufficient, a supplementary DC power supply is used to make up for the lack of charging power.

[0016] When the output power of the aged battery to be charged is less than the output power of the aged battery to be discharged, a bidirectional DC / DC is used to draw power from the aged lithium battery to the DC bus for special energy storage lithium battery energy storage. The central dispatching controller obtains the charge and discharge status of all aged batteries through wireless communication, and automatically dispatches the number of special energy storage lithium batteries to be discharged.

[0017] When designing the system, the number of dedicated energy storage lithium batteries deployed is sufficient to absorb the discharge capacity of all aging batteries, and there is no need to use online inverters or braking resistors to consume the discharge power.

[0018] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC, characterized in that: The lithium battery aging system consists of a central dispatching controller, a replenishing DC power supply, a dedicated energy storage lithium battery, an aging operation lithium battery, a bidirectional DC / DC module, a high-current DC bus and wireless communication. Multiple dedicated energy storage lithium batteries and bidirectional DC / DC modules constitute the energy storage system.

2. The lithium battery aging system based on wireless communication, energy storage system and bidirectional DCDC according to claim 1 is characterized in that: The lithium battery and the bidirectional DC / DC module constitute an energy storage system as a charging and discharging device for the lithium battery aging system.

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