Difficulties of typical scenes and promotion of waste dynamic lithium-ion batteries

　　Author ：Iflowpower – Portable Power Station Supplier

With the promotion of new energy vehicles, the future dynamic lithium-ion battery will face large-scale retirement issues. In 2020, a group of new energy models in the earliest promotion is about to retire, and it is expected that this year's retirement scale will reach 25GWH (about 200,000 tons). How to use it, manage this scale of waste, lithium-ion batteries, worthy of common thinking together.

Under the vigorous promotion of our government, our country has been a largest new energy car market in the world, and is also the largest processing of new energy power lithium-ion batteries. According to the report of the Dynamic Lithium Ion Battery of Chemistry and Physical Power Industry Association. With the promotion of new energy vehicles, the future dynamic lithium-ion battery will face large-scale retirement issues.

In 2020, a group of new energy models in the earliest promotion is about to retire, and it is expected that this year's retirement scale will reach 25GWH (about 200,000 tons). How to use it, manage this scale of waste, lithium-ion batteries, worthy of common thinking together. 1.

Waste dynamic lithium-ion battery recycling stage Division When the power lithium ion battery cannot fully meet the vehicle needs, it can be used in other scenes, and continuously use its function to maximize resource utilization. According to the degree of battery performance, the recycling is generally divided into four stages, extending from the lower stage from the first stage until it is completely unable to meet the use requirements of each scene, that is, the regeneration utilization. The first phase of the battery can be used for low-speed electric vehicles such as low-speed electric vehicles, electric tricycles, etc.

of discharge power, and the electrical three-wheeled field scene; the second phase of the battery can be used in the power supply and other energy storage scenarios for battery performance; The battery is desired to be low-end storage, such as home energy storage, charging treasure, etc .; the fourth stage battery will be regenerated, recovering metal elements. The power lithium-ion battery in the top three stages is the ladder utilization link, which can improve the economics of the ladder, which is the top priority of the improvement of the full life cycle value.

2. The ladder is first determined by the battery solution. It is not a whole package, such as good performance, and meets the corresponding scene requirements, the whole package enters the ladder utilization.

If you cannot use it, the dismantling module is selected, and the performance of a good performance is selected, and the reorganization is reorganized. The modules that cannot meet the requirements are further split into the monomer, select the monomer capable of ladded secondary recombination. 3.

Typical ladder use scenario and its working conditions requires a variety of ways to utilize scenes, each scene has corresponding use requirements. This article will focus on typical use scenarios, and decompose the extent to which the waste-driven lithium-ion battery in various scenarios is difficult. 3.

1 Communication Base Sports Use Scene Communication Base Station for security considerations, the battery material is limited, only lithium iron ion battery is used. The battery is divided into two types of discrete and integrated formulas. The difference between the two is that the battery module and the battery management system are integrated.

Waste batteries can achieve ladders in these two forms, compared two power supplies (YD / T 2344.1-2011 communication lithium iron phosphate ion battery pack Part 1: integrated battery pack, YD / T2344 .2-2015 Communication lithium iron phosphate ion battery pack Part 2: discrete battery pack), it can be seen that there is only a big difference in the requirements of cycle life, and other indicators require almost the same.

By comparing the experimental content and method of the vehicle power lithium ion battery and communication base station alternate power supply, it is not difficult to find that after the vehicle power lithium ion battery is retired, if only the remaining capacity changes, other performance recession is not serious. Simply focus on the capacity retention rate, battery pack consistency, depth discharge, etc., can be used in the communication base station alternate power supply.

Table 2 Standard and Experimental Measures for Battery with Base Station Comparison 3.2 Energy storage containers can also be promoted in the energy storage area, usually use emergency energy, and can also be stored in power grid load. Output energy during the high load of the grid, realize the function of peak-filled valley, reduce the power network fluctuation.

The energy storage container system will accumulate energy storage batteries, battery management system BMS (BatteryManagementsystem), energy storage converter system PCS (PowerControlsystem), Annomeric monitoring system, fire protection system, air conditioning system, etc. Typical 40 feet (12192mm × 2438mm × 2896mm) Container energy storage system architectural approach to consolidate 4 parts: energy storage converter PCS, ladder battery pack, active balance battery management system BMS and battery cabinets, and equipped with power environment control system Fire protection system. Due to the large size of the container, the scene is recommended to make a whole package utilization of the waste dynamic lithium-ion battery, and reduce the battery unpacking restructuring cost.

At the same time, if the system is arranged in the industrial park and other open space, it can be used in conjunction with the photovoltaic board to generate electricity, and further enhance the economics of the energy storage system. The energy storage containers built by the company are often difficult to access the national power grid, and the power micro network in the formation of the park is the most practical approach. If the storage capacity is small, it is preferentially charged by charging piles to new energy vehicles; if the energy storage is large, it can be considered for the supply of electricity for office buildings.

3.3 Low-speed car use scene low-speed electric car covers electric bicycles, electric motorcycles, electric tricycles, low-speed electric vehicles, etc. In response to the electric tricycle used by the courier company, some companies have launched the demonstration promotion of the ladder battery rental model.

The property rights of the battery are attributed to the ladder, the delivery company payment, the later battery repair, the replacement is also responsible for the ladder. Such a business model can bring the following advantages: It is conducive to extending the life of the battery; 3 After the ladder can be used after use, the battery can be effectively recovered, enter the regenerative utilization link, and the alert battery causes environmental pollution. According to the "four-wheeled low-speed electric vehicle technical conditions" (draft), the dynamic lithium-ion battery of low-speed electric vehicles in three key technologies in safety, electrical performance and circulating life, reference to new energy vehicles with power lithium ion batteries Standard, car ladder dynamic lithium-ion battery is high in low-speed vehicle category.

Table 3 Low-speed electric vehicles Performance requirements for dynamic lithium-ion batteries 3.4AGV Cars Using Scenario AGV (AutomateDGUIDVEHICLE, AGV) Car finger equipped with electromagnetic or optical guidance devices, can travel along a predetermined guide path, with security protection And various transport vehicles, industrial use do not need drivers to carry the car, based on the battery. The status characteristics of the AGV trolley are as follows: fixed route, shallow charge shallow, easy to use.

At present, the battery usually used by the AGV trolley is still a lead-acid battery. Therefore, the original lead-acid battery can be replaced with a ladder power lithium ion battery. Table 4AGV cell lead-acid battery and ladder lithium ion battery performance comparison 4 Further development.

4.1 Disassembly utilization, the cost of the cost of each vehicle is not the same, and it is impossible to use the same set of dismantling flow lines, which leads to extremely inconvenient battery dismantling. The degree of automation is extremely low.

When the waste dynamic lithium-ion battery is separated by the retardation, it is not possible to pass the multi-course process, including quality testing, safety assessment, cycle life detection, etc., and then select the battery core, and reorganize the ladder. The whole solution is consumed, the cost is high.

4.2 The safety of the ladder battery should pay attention to the retired power lithium-ion battery experience the harsh car use link. All aspects of performance recessions are difficult to discriminate, especially the safety of the battery should cause the industry's key attention.

With the new life of the battery, the hidden dangers such as fire and self-ignition have risen sharply. The safety standards for new batteries are very complete, but the safety of the ladder battery is not related to the relevant standards. Some companies propose to use large data to determine the health of the battery module, can this method or as a auxiliary means of manual screening or as a separate means of manual screening.

At the same time, the use scenario of the ladder battery lacks control. What scenarios can be used, what scenarios are prohibited from using the ladder battery without the corresponding requirements; how to deal with the ladder battery, how to make monitoring, the responsibility of the accident, how to judge the blank area of ​​the industry supervision. 5, the dynamic lithium-ion battery ladder uses the ladder of the far-renowned powerful lithium-ion battery to use the industrial development.

Through the above content, it can be seen that the ladder of the waste dynamic lithium-ion battery can maximize resource utilization, in line with green, cycles, and continue. Its use scenario is rich, the market space is huge, and it can create great economic value under the premise of using it. However, the industry also faces economic and security double tests, but only the two bottlenecks can we usher in the high quality development of the industry.