Teach you how to choose lithium battery for industrial vehicle

Now the social environment, energy conservation and environmental protection is an issue from all walks of life are advocated, so a lot of new energy products to appear on the market. In the present forklift truck market, lithium electric forklift with quiet, convenient control, energy conservation, environmental protection, use cost low status characteristic quickly occupied the market.

According to the CITA, lithium battery forklift total sales of 8681 units in 2017, among them 3699 sets of electric balance heavy forklift truck, electric motoring type warehouse forklift 91 units, 4891 sets of electric walking type warehouse forklift; Exports of lithium battery forklift 3604, lithium battery electric tractor total sales of 144 units, all sales in the Chinese market. Which means that the application of lithium-ion battery technology in forklift truck industry in China has begun to take shape, although the lithium-ion batteries in electric forklift fork lift truck market share in the proportion is not big, but the forklift company investment in the field is very positive, and with the national policy tilt, market-oriented energy-saving, environmental protection, strengthen environmental protection consciousness, lithium electricity in the industrial application will be more rapid development of vehicle industry.

Divided into lithium battery and lithium-ion batteries Lithium ion batteries, lithium battery is lithium metal or lithium alloy is used to do the cathode materials, the use of water battery electrolyte solution; The lithium ion battery is a secondary battery (rechargeable batteries), it mainly rely on lithium ion move between the positive and negative to work. We usually say that the lithium battery, is actually a lithium-ion battery. Lithium ion batteries on the market at present is divided into three categories: The ternary lithium battery, manganese acid lithium, lithium iron phosphate.

Industrial vehicle market at present, three Yuan and battery lithium iron phosphate batteries is larger. Since 2014, with the progress of science and technology, li-ion battery cathode materials, anode materials in the areas of rapid development, led to the lithium battery energy density increased by 10% a year, at the same time, as China's rapidly improve lithium electricity industry scale, form a complete set, lithium battery prices fell by 10% each year; In 2017, the value of lithium electricity/price point is finally coming.

Compared with the specification of new energy passenger car market, forklift, lithium electricity the segment features at present: is the lack of industry management, product quality is uneven. Led to the industry, both customers and dealers, service providers, are under a lot of confusion, let lithium electricity product application in the market is full of uncertainty.

Along with the progress of science and technology and the rapid development of China's lithium electricity industry and scale, lithium enjoy new can seize the opportunity, dedicated to provide industrial vehicles worldwide lithium electric driven solutions. Currently USES joint development, design, manufacture, distribution, leasing mode, suitable for vehicle industry Power lithium battery, with a series of advanced lithium-ion batteries to replace the lead-acid battery application solutions, can be flexible matching forklift, AGV, golf car, the work high above the car, etc.

In view of the application and the way of choose and buy lithium battery forklift, as the country's new energy car accessory power lithium battery recommended directory companies - lithium can enjoy new Lixxon the following solution is given.

A, and the use of national authentication security lithium electricity, safety first

Choose lithium electricity, first of all is safe! For drivers, plant, or a forklift dealers, forklift service company, is the most important safety first.

Only batteries and Pack system through the national testing agencies certified products, this is the security of a lithium battery! Due to lack of li-ion battery forklift industry standard, so is currently used in passenger car standard design, manufacture lithium battery forklift, this is seen as the industry's highest standards.

Second, the excellent properties of: from batteries and Pack process of PK

1, the cell selection

Mainstream varieties of ternary lithium and lithium iron phosphate, contrast is as follows:

1.1 is the outer covering of ternary lithium soft package, the outer packing of aluminum shell lithium iron phosphate or molded case. The ternary lithium energy density slightly higher than the lithium iron phosphate.

1.2 the lithium iron phosphate material pyrolysis temperature about 800 ℃, the ternary lithium about 200 ℃.The much more intense, and the chemical reaction of the ternary lithium can release oxygen, the rapid combustion at high temperature under the action of the electrolyte. So the ternary lithium is mainly used in 'auto lightweight small passenger cars, and lithium iron phosphate is mainly used in bus and industrial vehicles. The mainstream in the market of lithium can enjoy new li-ion battery forklift, its batteries is the lithium iron phosphate batteries LiFePO4, due to its stable structure, strong security, internal nested loops more preferred by the industry as a battery forklift.

1.3 the cycle life of ternary lithium battery is normally 1/3 to 1/2 of the lithium iron phosphate.

1.4 price: ternary lithium is higher than the lithium iron phosphate.

2, batteries manufacturing

Batteries, 80% of the cost of the finished product Pack, the current domestic large and small lithium battery plant about 600.Product range, production scale, quality, technology, quality, price and customer market each are not identical, the gap is bigger.

National new energy car accessory power lithium battery recommended directory enterprise, because of its standard management, raw materials (positive anode materials and electrolyte, diaphragm, etc.) choose strictly, high degree of automation equipment, production scale is big, the quality of batteries, lithium-ion batteries are generally seen as being the best. China is now the world's largest producer of lithium iron phosphate battery, for instance, as the country's new energy car accessory power lithium battery recommended directory demonstration plant, intelligent manufacturing, Jiang Xian chi technology capacity is dozens of times of numerous small domestic lithium battery, the strict production process, realize fully automated production, enclosed, clean production, so the quality is very reliable.

3, choice of batteries: short barrel plate theory + A/B batteries

Select the purpose of the batteries, is to improve the consistency of battery group.

As a commodity, even 30 seconds before and after the production of batteries, the capacity, internal resistance, voltage parameters, such as there is big or small difference. Battery products in the consistency of batteries directly affect the service life of battery and discharge capacity. Advised to choose a battery voltage deviation in less than 20 MV between batteries; Frequent use of vehicles, select the voltage deviation within 10 MV batteries;(the index in the lithium battery management controller can be observed on the display, with battery let stand (not charged) at the time of the parameters for the standard).

Battery consistency is higher, its batteries share the capacity of the average, each cell capacity and the output is more stable, the longer battery life, it is easy to generate new cells using 1 ~ 2 years fast attenuation phenomenon.

Industry has make the finishing point words: technical and financial strength is the guarantee of screening high consistency. However, whether A level batteries or class B batteries, if there is no professional equipment, even put batteries in the eyes couldn't say for sure. In fact, as long as the batteries and Pack system products through the national examination organization certification, is the security performance of lithium battery!

4, Pack integration process: is by no means a simple series, parallel and BMS

The safety of the battery Pack design is a very concerned, and the greatest part of the difference.

Lithium battery safety protection is divided into four stages, from the protection of the battery pack outside introversion, respectively: batteries to protect the safety valve, batteries, blown fuse protection, short circuit protection circuit between BMS main road cut back protection. Among them, the batteries to protect the relief valve is the most important protective barrier batteries inside, like automotive airbags, critical moment. Short circuit protection between the batteries for short circuit between batteries due to external device failure is crucial, equivalent to put a lot of fire hydrant in batteries directly, this feature requires good electronic circuit technology and many material costs. Therefore, can be selectively ignore most industry manufacturer; Blown fuse protection is a common device, no longer here; BMS main circuit protection is one of the most basic functions of BMS, protection way is by cutting off in series in the main circuit of relay or MOSFET static power electronic switch to main circuit of the battery power protection.

Pack the finished system high security technology standard, at present only in the auto industry has the strict testing requirements. Only through strict safety test Pack and auto accessories can give these standards include short circuit, open circuit, fire, waterproof, weight, piercing, and so on.

5, batteries protection: BMS

Lithium battery protection and management controller (BMS) is critical, the choice of lithium battery cells belong to the active material, internal resistance is very small, about one over ten of the lead-acid battery. As a result, the excessive charging and discharging of the battery, high temperature and low temperature, impact current, short circuit the harm such as battery performance to real-time monitoring of all kinds of conditions, to cut off the hazards in time.BMS can to respond in a microsecond time response, cut off the main loop of the battery, ensure the battery and the safety of the personal property; At the same time, with a full-time active equalization circuit of BMS, can guarantee the battery after using for a long time, produce inconsistent when power can be balanced circuit timely repair or discharge, which can effectively extend the service life of at least 30% of the battery.

6, cabinet design

Professional housing industrial design must consider the mechanical, thermal model, lithium battery energy density is lead-acid battery more than three times. Therefore, lithium battery box body is smaller than lead-acid battery box. Lithium battery box should have the brace, piercing, waterproof, heat, cold, and other functions. In northern China, for example, because of the cold weather for a long time, forklift lithium electricity protective device should be equipped with heating, in and out of cold storage environment to prevent condensate risk of short circuit in the design, and so on.

Three, service and market

1, quality assurance, after-sales service: free maintenance indicates does not need to after-sales service

Forklift batteries, lithium battery suppliers on the market at present and process standards, roughly divided into 1500 - cycle 3 years warranty, a 2000 - cycle 3 years warranty, or recommend directory to form a complete set of new energy vehicles power battery enterprises provide: 5 years warranty 4000 cycles and 10000 hours.

Lithium battery forklift BMS generally don't take batteries automatic equilibrium model, so it's best to use a period after the batteries active equalization processing. Now, almost no suppliers provide lithium battery market equilibrium after service.95% of the forklift truck factory are lack of training in lithium electricity knowledge, understanding, good and evil people mixed up is more difficult in the present of lithium battery market, discern the stand or fall of lithium battery quality and service.

2, after the market replacement alternative

Interests, lead-acid battery in forklift truck market after replacing the lithium battery is popular nowadays, a lot of shops in the market do the replacement business because of a lack of understanding of the lithium battery, blindly comparison, the result often choose without quality certification, low quality products, hard to avoid the last quality and service problems, lead to the loss of customers (for example: in the BMW factory/ huawei factory forklift lithium electricity transformation project).

3, brand company

With government support, the lithium electricity industry rapid development in recent years, the price decline year by year, the cost of decline also brought opportunities for forklift industry, lithium electric forklift truck market to replace lead-acid become a trend .Nearly two years almost every domestic makers have launched its own brand of lithium battery forklift, even have the forklift truck makers set up more lithium battery Pack factory to ensure that the docking own electronic control system and after-sale service, exclusive control of management system and other accessories. Looking abroad, eternal force forklift company from China to buy high quality batteries, developed by European headquarters to BMS, developed their own lithium battery products, the leading lithium electricity market in Europe.

To sum up, forklift lithium electrochemical industry trends, market opportunities. At present, the lack of lithium battery industry standard forklift industry, for security and performance security requirements, market tendency to choose the lithium battery manufacturers is the national new energy automobiles power lithium battery recommended directory, choose batteries and Pack integration system possess national coach products form a complete set of quality certification of products.

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