What are the types of lithium-ion battery protection boards? Does the lithium ion battery need to protect the board?

2021-08-18 10:54:59 0

What are the types of lithium-ion battery protection boards?

1. Divided from the overcharge and overdischarge function of lithium-ion batteries

If it is divided from the charging and discharging performance of the lithium ion battery, the protection board can be roughly divided into two types, one is a single function, which is one-way overcharge protection for the battery, or overdischarge protection for the battery, and One is the two-way protection, which has both overcharge and overdischarge functions. The two-way protection board is currently more widely used than the single protection board!

2. Divided from the combination of lithium-ion battery packs

The different series and parallel modes of lithium-ion battery packs also directly lead to different lithium-ion battery protection boards. The battery packs can be roughly divided into two categories: series and parallel. The series-connected battery packs are used to increase the overall voltage. The batteries are connected in parallel. The group is to increase the overall capacitance. Therefore, the lithium-ion battery protection board is also divided into two types according to the two connection modes of the battery pack.

3. From customer requirements

Lithium-ion battery protection boards are used in various fields, but the voltage and current requirements of lithium-ion battery packs in each field are different. It is also due to different parameter requirements that determine the internal change of lithium-ion battery protection boards. To change the specific parameters of the protection board.

4. From the quality of the board

The board of lithium-ion battery protection board is divided into hard board, which is commonly known as hard board. This board is currently the most commonly used; the opposite is soft board; there are single-layer boards; corresponding multilayer boards; and double-layer boards ; These are the most basic five types of plates. If these plates are combined in different ways, they will be divided into more types.

5. It is easy to understand from the positive and negative materials on the board. The position and number of the hardware on the board also determine the different types of protection boards.

Looking at the above points, in general terms, the basic working principle of the lithium-ion battery protection board is basically the same, the difference is the difference in individual parameters!

Does the lithium ion battery need to protect the board?

The lithium ion battery protection board is to protect the lithium ion battery from overcharging, overdischarging, short circuit and other problems. It is recommended to use it for safety! Regarding the idea that some people do not need a protective plate for lithium-ion batteries, a big reason is the emergence of lithium iron phosphate batteries. Because there is news that lithium iron phosphate batteries are not afraid of overcharging or over-discharging, the argument that lithium-ion batteries can be used without a protective plate has emerged.

However, so far, there has not been a lithium-ion battery manufacturer that publicly declares that it does not use protective plates. The lithium-ion battery protection board is the charge and discharge protection for the series-connected lithium-ion battery pack. When fully charged, it can ensure that the voltage difference between the individual cells is less than the set value, realize the equal charge of the individual cells of the battery pack, and effectively improve the charging effect in the series charging mode.

At the same time, it detects the overvoltage, undervoltage, overcurrent, short circuit, and overtemperature status of each single cell in the lithium-ion battery pack to protect and extend the battery life. The undervoltage protection prevents the lithium-ion battery from being damaged due to over-discharge when each single-cell battery is discharged. There is currently no official information that lithium-ion batteries can be used without the protection board. Generally, batteries have protective plates, and the use of protective plates is also for battery safety. But different types of lithium-ion battery protection boards have different uses.

label: BMS