Special grinding machine for battery anode materials

Contents Catalog

1 Why is it necessary to use a special grinding machine for battery anode materials？
2 What are the components of the negative electrode material for batteries?
3 Why choose our specialized grinding machine for battery materials?
4 Which battery manufacturers in China have chosen our special grinding machine for battery anode materials?
5 Parameters of the special grinding machine for battery anode materials (one of the models)
6 The complete list of the special grinding machine for battery anode materials for the entire production line：
7 OPEX calculation of the special grinding machine for the battery anode materials plant：
8 Part of the battery material grinding machine is at the customer’s site:
9 FAQ about the grinding machine for battery anode materials
10 Cronus’ other recommended grinding machines:

Why is it necessary to use a special grinding machine for battery anode materials？

In simple terms： The anode materials of batteries (such as Petroleum coke, graphite, silicon-carbon, hard carbon, etc.) have extremely high requirements for the purity, particle size, morphology and safety of the powder. Ordinary ore grinding mills simply cannot meet these requirements, and dedicated grinding mills must be used.

The reason for using a dedicated grinding machine is mainly due to the following important factors:

Zero tolerance for impurities, ordinary mills will cause “iron contamination”.

Iron impurities can cause short circuits within the battery’s internal circuit, shorten the battery’s lifespan, and even lead to thermal runaway. Therefore, when processing the negative electrode materials of the battery, iron impurities must not be introduced.

The particle size requirement is finer and the particle size distribution must be extremely narrow

Negative electrode material: Generally, ultrafine powder of 3 to 20μm is required, and the particle size distribution should be narrow. If it is too coarse, the battery charging and discharging will be slow and the capacity will be low. If it is too fine, the specific surface area will be too large, and there will be many side reactions due to liquid absorption and expansion

The crystal morphology of graphite must not be damaged

The negative electrode graphite requires a flake/spherical structure to ensure: high density, good electrical conductivity, and lithium-ion intercalation speed

Explosion-proof and anti-static are hard and fast safety requirements

Graphite and silicon-carbon anode powders are flammable and explosive, and are highly prone to generating static electricity. During the grinding process, if the dust concentration is too high, they may explode and catch fire.

Low moisture content, closed and dust-free production

Specialized mills are generally integrated in grinding, drying and classification, operating in a fully enclosed manner, without absorbing moisture, oxidizing or leaking dust.

What are the components of the negative electrode material for batteries?

1773990224 磷酸铁锂 — Lithium iron phosphate

The positive electrode materials of batteries mainly include petroleum coke (fresh petroleum coke and calcined petroleum coke), lithium iron phosphate, lithium phosphate, lithium hydroxide, etc., while the negative electrode materials mainly consist of natural graphite, artificial graphite, LTO, etc.

Why choose our specialized grinding machine for battery materials?

First, let’s take a look at a picture:

As shown in the figure, what you are seeing is the internal structure of the Cronus battery material-specific grinding machine. It demonstrates that the parts of our grinding machine that come into contact with the materials during operation are all made of high-composite ceramic materials, ensuring that no iron impurities are produced throughout the production process. Additionally, this system is fully equipped with a cooling system and a dust removal system, significantly enhancing the safety of processing battery materials and reducing the leakage of dust.

The entire production line of this equipment is shown as follows:

Battery positive and negative electrode material grinding machine production line

The main unit of the battery positive and negative electrode material grinding machine

Which battery manufacturers in China have chosen our special grinding machine for battery anode materials?

Some Chinese listed companies have chosen our company’s special grinding machines for battery materials. In particular, CATL (Ningde Times) has adopted Cronus’s impact-type special grinding machines for battery materials on a large scale.

Parameters of the special grinding machine for battery anode materials (one of the models)

型号 Model		CJM-1000	CJM-1250
转子直径 Rotor Diameter（mm）		1000	1250
转速 RPM(r/m)	主机 Main Unit	<1900	<1900
转速 RPM(r/m)	分级轮 Classfier	<2900	<2900
装机功率 Power（KW）	主机 Main Unit	132	160
	分级轮 Classfier	30	30
	风机 Blower	55	75
	合计 Total	217	265
尺寸 Size（mm）	主机高度 Height	3850	5300
尺寸 Size（mm）	占地面积 Area	1300×300	1500×500
产量 Capacity（Kg/h）		500-700	750-900

For lithium iron phosphate, our recommended configuration is as follows:

设备参数及处理能力 Equipment parameters and processing capabilities
转子直径 rotor diameter （mm）	1250	主机 Main Unit	160
主机转速 RPM	<2000r/min	分级机 Classfier	37
分级轮转速 Classfier RPM	<1500r/min	风机 Blower	110
进料粒度 Inputsize（mm）	≤10	加料装置 Feeder	4
成品粒度范围 Output Size(mesh)	100~1250	卸料阀 Discharge Valve	0.75
加工物料 Processed materials	磷酸铁锂 lithium iron phosphate
细度要求 Fineness requirement	D97小于100微米 D97<100um
设备产能 Capacity	3-3.5t/h

The complete list of the special grinding machine for battery anode materials for the entire production line：

名称 Items	型号/规格 Model	单位 Unit	数量 Quantity	说明 Details
加料装置 Feeder	CJM-1250	Set	1	Motor power ：4kw VFD Reducer model：XWD4-23-2,2
主机 Main Unit	CJM-1250NX	Set	1	The main unit adopts a belt drive. Hammer head material: zirconia composite ceramic Material of the gear ring: zirconia composite ceramic. The main bearing assembly adopts imported bearings. The material of other parts in contact with the materials is 304 stainless steel The air inlet is equipped with a manual valve to adjust the air volume The main motor is 160kw, and it is a YE3 series product from Wannan Set up an oil circulation system A water cooling system is installed on the outer wall of the main unit
分级机 Classfier	CJM-1250NX	Set	1	Material of the classifier blade: zirconia composite ceramic. The 37kw classifier motor of Wannan YE3 series products The material of the other parts in contact with the materials is 304 stainless steel
脉冲除尘器 Pulse Dust Collector	DCC-464	Set	1	The upper half of the dust removal box (dust removal box body) is 3mm thick. The thickness of the ash hopper part is 4mm. Dust removal material: The parts in contact with the material are made of 304 stainless steel. Adopt offline multi-chamber injection The cloth bag is made of Sichuan oil-repellent and water-repellent needled felt The number of cloth bags is 16 warehouses *29 cloth bags/warehouses =464 The diameter of the cloth bag is 129 The length of the bag net frame is 2000mm The inner wall of the dust collector is sprayed with a wear-resistant layer.
出料螺旋 Discharge screw	customize	Set	1	The parts in contact with materials are made of 304 stainless steel. Power: 3kw
关风机 rotary valve	GFJ-300B	Set	1	Power: 0.75 kW. The parts in contact with materials are made of 304 stainless steel
风机 Blower	customize	Set	1	The motor power is 110 kW. Material: carbon steel. One muffler is provided for each of the inlets and outlets of the fan
管道系统 Pipeline System	customize	Set	1	The thickness of the pipe is 3mm. The material is 304 stainless steel. The inner walls of the pipes in contact with the materials are covered with alumina ceramics
电控拒 Electronic control	customize	Set	1	The frequency converters for feeding, main machine, classifier, and fan adopt the Shenzhen “Invt” brand. The main electrical equipment adopts the Chint brand It adopts a PLC touch screen control system The PLC adopts Siemens. The touch screen adopts Kunlun Tongtai
随机工具 Tool	customize	Set	1	Free
FOB price：**** Contact us to obtain your personalized solution.

OPEX calculation of the special grinding machine for the battery anode materials plant：

Total Power：314.75kw

Actual Operating Power：314.75×0.8=251.8kw

Capacity：3-3.5 TONS PER HOUR

Electricity Cost for Producing One Ton: 72-83.6 kW

Part of the battery material grinding machine is at the customer’s site:

Battery anode material grinding machine

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FAQ about the grinding machine for battery anode materials

Will iron impurities be introduced during the grinding process? Can zero iron pollution be achieved?

The parts of the .cronus battery material grinding machine that come into contact with the materials are all made of high-composite ceramics, and there are no iron impurities present. The subsequent pipes are also made of stainless steel, ensuring that there is absolutely no possibility of iron being mixed in.

How fine can the output particle size be? Is the particle size distribution narrow or not? Can the standards be consistently met?

The finished particle size of the Cronus battery material grinding machine can reach: D97 = 100 microns, D90 = 65 microns.It can fully meet the fineness requirements of the battery materials, and the particle size of the finished fine powder is uniform, perfectly meeting the production requirements of the battery materials.

Will materials like graphite and silicon-carbon be crushed or have their structure or sphericity damaged during grinding?

The working principle of the impact roller press ensures that the structure of the graphite is not damaged, and this has been verified in multiple battery material processing sites.

How is the sealing of the entire system? Will it oxidize, absorb moisture and raise dust?

The entire production line equipment is equipped with negative pressure systems, and is fitted with pulse dust collectors which do not produce dust. At the same time, the manufacturing precision of the equipment is very high and the sealing performance is excellent. In addition, the production line is also equipped with a cooling system and a heating system, and the temperature control effect is very good.The entire production line equipment is equipped with negative pressure systems, and is fitted with pulse dust collectors which do not produce dust. At the same time, the manufacturing precision of the equipment is very high and the sealing performance is excellent. In addition, the production line is also equipped with a cooling system and a heating system, and the temperature control effect is very good.

What is the output? Is the energy consumption high or not? Can continuous automated production be achieved?

At present, our company has two types of production lines. Depending on the type of materials processed, the output can reach 0.5 to 4 tons per hour. The equipment can operate continuously.

Can multiple materials be ground simultaneously: graphite, silicon-carbon, hard carbon, and lithium iron phosphate?

of course！！！！

Can multiple materials be ground simultaneously: graphite, silicon-carbon, hard carbon, and lithium iron phosphate?

Our battery material grinding machine has obtained the EU CE certification and the ISO9001 quality system certification in China. At the same time, our company can offer comprehensive after-sales service, as well as the production of preliminary drawings. We can also design the placement of your equipment based on the customer’s factory.

How is your after-sales service?

Regarding installation:
Our company can provide on-site installation guidance by our engineers and also conduct training for the operation workers of our clients. Subsequently, 24/7 telephone consultation and guidance will be available.
Accessory section: Long-term stable supply.

What is your payment method?

Our company’s equipment requires a 30% advance payment. The remaining 70% must be settled before the products are shipped. Additionally, customers can come to our factory for inspection before the shipment to ensure that there are no quality issues with your products.

Cronus’ other recommended grinding machines: