The differences between lead-acid batteries and lithium batteries of electric vehicles

In fact, lithium ions mainly rely on lithium ions to move between the positive and negative electrodes to work. During charging and discharging, li+ is embedded and deintercalated between the two electrodes: when charging the battery, Li+ is deintercalated from the positive electrode, and the electrolyte is embedded in the negative electrode, and the negative electrode is in a lithium-rich state; Generally, a battery containing a lithium element as an electrode is used, and at present, the most negative electrode is graphite. Lithium batteries compared to lead-acid battery, lithium battery having a light weight, high specific capacity, long cycle life, etc., it is easy for the elderly as a electric scooter charging vehicle power supply, not only lightweight and portable, but also helps vehicle products "Lightweight and simple" design.

The electrode of a lead-acid battery is mainly made of lead and its oxide, and the electrolyte is a sulfuric acid solution. When the lead-acid battery is charged, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead. In the discharge state, the main components of the positive and negative electrodes are lead sulfate.

Both batteries are not all the same except for energy storage devices. Lead-acid batteries are safer and cheaper, but the energy density is lower than that of lithium batteries, so lead-acid batteries are larger.

At this stage, we have not been able to make breakthroughs in battery (storage) technology research, that is, before the "low-cost, high-performance" battery has not been put into commercial application, we can use existing lead-acid batteries and lithium batteries. The excellent characteristics are combined to transform and upgrade, as the main research topic in the current period. I believe this will have a clearer direction for the development of the elderly electric scooter and even the entire electric scooter industry.

As far as the current popularity rate of "lithium electric cars" is far lower than that of products using "lead-acid batteries", the reason is that the current cost of lithium batteries is still relatively high. Therefore, in the design of the existing "lithium electric car" products, the capacity allocation of the lithium battery is reduced to reduce the implementation cost of the whole vehicle, and this makes the existing "lithium electric car" product model too singular. For example, the current lithium-ion products on the market are mostly "motorcycles" and the duration is not very far. However, the four-wheeled electric vehicles and the four-wheeled electric scooters are far more suitable for the current situation. "Battery", for the discussion of the above related issues, Haoxiang Electric hopes to let more consumers recognize the analysis of "lead acid electric and lithium batteries", then you have already realized that when you buy electric scooter How should I choose the battery?

Older electric scooter battery analysis damage

There are many elderly friends who may have problems like this when using the old electric scooter. It may be that the battery has a problem, and your old electric scooter will not go away, or you can’t go far. Help you figure out how good or bad the battery is.

As a "convenient power source", batteries have been widely used, especially in the application of these new energy electric scooters. As the popularity of electric scooters continues to increase, more and more batteries are close to the people. Life, but people know little about the battery.

Most of the users of electric scooters like the elderly are elderly people. They know little about this knowledge. Every time they go wrong, they are helpless. It is recommended that these users should be good both elderly and young. Learn battery usage and maintenance knowledge to better maintain your electric scooter. Sometimes users may ask questions about how badly the battery can be damaged, whether the battery with reduced capacity can be repaired, how to maintain the battery, etc. The reason for the damage, the repair and maintenance of the battery are as follows.

1. "Overcharge" causes battery damage

"Overcharge" is a phenomenon that excessively charges the storage battery of the electric scooter of the elderly, which has a destructive effect on the chemical and physical properties of the battery.

The electric scooter charger charges the battery packs connected in series at the same time of charging. The battery with higher voltage will be fully charged first, and the battery with lower voltage will be fully charged or even charged all the time. The voltage is set for charging or stopping charging, so the fully charged battery will be in the "overcharged" state. The "pressure difference" hour has little effect on the battery. When the "pressure difference" is large, the battery pool that often "overcharges" will cause an increase in the thermal reaction of the electrolyte until the battery is filled.

2, "Debt" causes battery damage

The "debt" of the old electric scooter is a phenomenon that destroys the coating of the storage battery plate caused by the excessive discharge of the battery when the battery is low. It should be known that the working voltage of any on-board electrical appliance has a standard range. If the electrical appliance exceeds this range, the electrical appliance is easy to be short-circuited or even burned. Below this range, the electrical appliance cannot be started or works normally, and even affects the service life. The vehicle electrical appliance and the storage battery are the same.

3. The large current discharge caused by the overload causes the battery to be damaged.

The electric scooter has a large current at the moment of starting and accelerating, and generally reaches 20a-50a. According to the electric motor power, the normal discharge current is generally controlled within 10a. Because the instantaneous current is too large, the overload is the overload of the electric vehicle during driving, such as excessive load, manned, etc., overload will increase the battery discharge load, long-time high current discharge, will directly affect the plate coating, speed up The process of plate softening. There is also a bad road condition that will cause the electric car to brake and start frequently. Such as potholes, red lights, roadblocks, and so on. These are all factors that cause large current discharges. This is because the larger the motor power, the greater the discharge current and the greater the damage to the battery.

4, the plate is vulcanized and the battery is damaged.

What is battery vulcanization? The formation of white hard lead sulphate crystal on the plate, it is very difficult to convert to lead sulfate of the active substance during charging, which is sulphation, referred to as "vulcanization".

The reason for this lead sulfate

This lead sulfate has poor conductivity, large electrical resistance, low solubility and dissolution rate, and difficulty in recovery during charging. Therefore, it is a cause of a decrease in capacity and a shortened life. Vulcanization is the main problem of reducing the capacity of the battery, but the high current damage to the battery plate is the crux of the reduction of the battery capacity of the electric vehicle.

In addition to the main causes of battery damage, battery quality, plate loss, electrolyte leakage, water loss, damage to the housing, battery terminal breakage, etc. are also the cause of battery damage, and there are some potentials that we have not noticed. Factor, it is inconvenient to say more, if you love your old electric scooter, then you should better maintain each of his parts, especially the battery, which directly affects the life of your electric scooter.