22 Years' Battery Customization

The advantages of ordinary batteries and rechargeable batteries

Feb 27, 2019   Pageview:842

According to your point of view, the ordinary battery is a primary battery, cannot be charged, the ordinary carbon battery, alkaline battery, and a lithium battery, the advantage is that the price is cheap (relative to the secondary battery, in fact, not much cheaper), The storage time is long, that is, the self-discharge is relatively low, and the weight is low to carry. The disadvantage is that it is not rechargeable, and the cost of one use is high. Discarding generally pollutes the environment and is suitable for appliances that consume less power and use less current.

 

The rechargeable battery is also a secondary battery. Commonly, there are lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, and lithium iron phosphate batteries. The disadvantage is that the price is expensive, and the price of the matching charger is higher. Larger, self-discharge is higher (secondary lithium battery is relatively small, but it is still relatively large compared to disposable lithium battery). The advantage is that the average price is relatively affordable, and the discharge current is large, which is suitable for appliances that are used frequently and consume a large amount of electricity.

 

Lithium battery voltage platform is high: the average voltage of the single cell is 3.7V or 3.2V, which is equivalent to the series voltage of 3 nickel-cadmium batteries or nickel-hydrogen batteries, which is convenient for forming a battery power pack.

 

The lithium battery has a high energy density relative to the battery. With high storage energy density, it has reached 460-600Wh/kg, which is about 6-7 times of lead-acid battery;

 

4. Compared with lead-acid batteries, lithium batteries are light in weight, and the weight in the same volume is about 1/5-6 of that of lead-acid products;

 

Lithium battery has a relatively long service life, and the service life can reach more than 6 years. The battery with lithium iron phosphate as the positive electrode is charged and discharged with 1CDOD, and there are 1000 records that can be used;

 

6. With high power bearing capacity, lithium iron phosphate lithium ion battery for electric vehicles can achieve 15-30C charge and discharge capacity, which is convenient for high-intensity start-up acceleration;

 

7. Low self-discharge rate, no memory effect;

 

8. The lithium battery has high adaptability for high and low temperature, and can be used in the environment of -20 ° C - 60 ° C. After the process treatment, it can be used in the environment of -45 ° C;

 

Green, whether it is produced, used or scrapped, it does not contain any toxic and harmful heavy metal elements and substances such as lead, mercury and cadmium.

 

Disadvantages of lithium batteries

 

2. Lithium batteries have poor safety and there is a danger of explosion.

 

3. Lithium batteries of lithium cobalt oxide materials cannot be discharged at a large current, and the safety is poor.

 

4. Lithium batteries need to protect the line to prevent the battery from being overcharged and discharged.

 

5. The production requirements are high and the cost is high.

 

The main advantages of lithium-ion batteries:

 

1. The energy ratio is relatively high. With high storage energy density, it has reached 460-600Wh/kg, which is about 6-7 times of lead-acid battery;

 

2, long service life, the service life can reach more than 6 years, lithium iron phosphate as the positive battery with 1CDOD charge and discharge, there are records that can be used 10,000 times;

 

3, the rated voltage is high (the single working voltage is 3.7V or 3.2V), which is equal to the series voltage of 3 nickel-cadmium or nickel-hydrogen rechargeable batteries, which is convenient for forming a battery power pack;

 

4, with high power bearing capacity, which lithium iron phosphate lithium ion battery for electric vehicles can achieve 15-30C charge and discharge capacity, easy to start high-intensity acceleration;

 

5, the self-discharge rate is very low, which is one of the most outstanding advantages of the battery, currently can generally be 1% / month or less, less than 1 / 20 of nickel-hydrogen battery;

 

6, light weight, the weight of the same volume is about 1/5-6 of lead-acid products;

 

7, high temperature and low adaptability, can be used in the environment of -20 ° C -60 ° C, after the process of processing, can be used in -45 ° C environment;

 

8. Green and environmental protection, whether it is produced, used or scrapped, it does not contain any toxic and harmful heavy metal elements and substances such as lead, mercury and cadmium.

 

9. Production basically does not consume water, which is very beneficial for China that lacks water.

 

Lithium-ion batteries have high energy density and high average output voltage. Self-discharge is small, good battery, less than 2% per month (recoverable). There is no memory effect. The operating temperature range is -20 ° C ~ 60 ° C wide. Excellent cycle performance, fast charge and discharge, charging efficiency up to 100%, and high output power long lasting. It does not contain toxic or hazardous substances and is called a green battery.

 

Lithium-ion battery: It is a secondary battery (rechargeable battery) that relies on lithium ions to move between the positive and negative electrodes to work. During charge and discharge, Li+ is intercalated and not intercalated between the two electrodes: when charging, Li+ is not intercalated from the positive electrode, and the electrolyte is embedded in the negative electrode, and the negative electrode is in a lithium-rich state;

 

Lithium batteries are classified into lithium batteries and lithium ion batteries. Both mobile phones and laptops use lithium-ion batteries, which are commonly referred to as lithium batteries. The battery is generally made of a material containing lithium as an electrode, and is a representative of modern high-performance batteries. True lithium batteries are rarely used in everyday electronics because of their high risk.

 

Lithium-ion batteries are easily confused with the following two types of batteries:

 

(1) Lithium battery: Metal lithium is used as a negative electrode.

 

(2) Lithium-ion battery: A non-aqueous liquid organic electrolyte is used.

 

(3) Lithium ion polymer battery: a polymer is used to gel a liquid organic solvent, or an all-solid electrolyte is directly used. Lithium-ion batteries generally use a graphite-based carbon material as a negative electrode.

 

The positive electrode material of lithium battery is lithium cobaltate LiCoO2, ternary material Ni+Mn+Co, lithium manganate LiMn2O4 plus conductive agent and binder, coated on aluminum foil to form positive electrode, negative electrode is layered graphite plus conductive agent and bonding The agent is coated on a copper foil base tape, and nanoporous carbon has been used for the relatively advanced negative-layered graphite particles.

 

1. Pulping: Mixing with a powdery positive and negative active material with a special solvent and a binder, and mixing them to form the slurry of positive and negative materials.

 

2. Coating film: The positive and negative electrodes are uniformly coated on the surface of the metal foil by an automatic coating machine, and automatically cut into positive and negative pole pieces after being automatically dried.

 

3. Assembling: According to the process of positive electrode sheet-separator-negative electrode sheet-separator from the top to bottom, the electrolyte is injected into the electrolyte, sealed, and the positive and negative electrodes are welded, that is, the assembly process of the battery is completed, and the finished battery is fabricated.

 

4. Chemicalization: Place the finished battery in the test cabinet for charging and discharging test, and screen out the qualified finished battery, waiting for the factory.

 

The page contains the contents of the machine translation.

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