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Introduction to wiring circuits and methods for lithium battery protection boards. As a safety protection device for lithium-ion batteries, the protection board should not only work reliably within the normal operating current range of the equipment, but also act quickly in case of accidental short circuit or overcurrent of the battery, so as to protect the battery cells. The principle of lithium battery protection board is very simple, and it is also easy to make. Its requirements for customers must be very clear, from the model of the components, process requirements, voltage requirements, current requirements, output port connection method, charging, etc.

Lithium batteries are usually divided into two categories:

Lithium metal battery: Lithium metal battery is a battery that uses manganese dioxide as the positive electrode material, metallic lithium or its alloy metal as the negative electrode material, and non-aqueous electrolyte solution.

Lithium ion batteries: Lithium ion batteries are generally batteries that use lithium alloy metal oxides as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolytes.

Wiring Circuit and Method for Lithium Battery Protection Board

The wiring method for each lithium battery protection board varies depending on the number of strings, and the same port and separate port wiring methods also differ. If you want to be precise to each product, please refer to the detailed page of the protection board, but the overall wiring remains unchanged. Due to the activity of lithium batteries, protective plates must be added when using lithium batteries to prevent overcharging, discharging, and overcurrent. Now let's introduce how to wire the lithium battery protection board.

Lithium battery protection board is used for charging and discharging protection of series connected lithium battery packs; When fully charged, it can ensure that the voltage difference between individual batteries is less than the set value (generally ± 20mV), achieving uniform charging of each individual battery in the battery pack, effectively improving the charging effect under series charging mode; Simultaneously detecting the overvoltage, undervoltage, overcurrent, short circuit, and over temperature status of each individual battery in the battery pack to protect and extend the battery's service life; Undervoltage protection prevents each individual battery from being damaged due to over discharge during use.

Lithium ion batteries are all batteries with a protective plate. Three wires will only appear on the protective board, and the battery will always have only two wires. There are two types of lithium-ion batteries, and the obvious 3.7V one is non phosphate iron aluminum, which can be directly replaced.

Replacement is very simple (pay attention to the positive and negative poles)

1: Remove the packaging of the original lithium battery, and then separate the protective plate from the battery with an electric soldering iron.

2: Similarly, then remove the protective plate of your new lithium battery and connect the battery to the old protective plate.

P+, P-output. B+is connected to the positive pole of the battery cell, and B - is connected to the negative pole. If it is a series connection of multiple sections, the negative terminal of B1 and the positive terminal of B2 are connected together, and so on. The negative terminal of the last battery is connected to Bn -. First solder the wires, and finally connect the battery. Do not connect them incorrectly. If there is no output after completion, remember to use a charger to charge and activate the P+and P-led charging interfaces.

Some lithium batteries have a third temperature protection wire, while others have a battery information verification wire (such as a warning when replacing a non original battery). Lithium ion batteries are all batteries with a protective plate. Three wires will only appear on the protective board, and the battery will always have only two wires. There are two types of lithium-ion batteries, and the obvious 3.7V one is non phosphate iron aluminum, which can be directly replaced.

How to connect the 36V lithium battery protection board?

1. First, connect 12 lithium batteries in series. If there are 24 sections, they can be connected in parallel first and then in series!

2. Connect the negative pole of the battery pack according to B. Sequentially B12B2B3,,, B101B1eB2

3. Same interface: The positive pole of the lithium battery pack is the positive pole for charging and discharging. C: Can be used as the negative electrode for charging and discharging.

4. Sub interface: The positive pole of the lithium battery pack is the positive pole for charging and discharging. C: Can be used as the negative electrode for charging. D: Can only serve as the negative electrode for discharge.

The function of lithium battery protection board

1. Overcharge protection to prevent damage to the lithium battery pack caused by overcharging.

2. Over discharge protection to prevent the battery from deteriorating its lifespan due to over discharge.

3. Overcurrent and short circuit protection are safer and more reliable during the use of lithium batteries.

4. Small in size, suitable for various lithium battery packs.

The above is an introduction to the wiring and methods of the lithium battery protection board. The battery protection board can protect the lithium battery and avoid its over discharge function. When a lithium battery is over discharged, the internal memory of the battery will undergo a qualitative change. At this time, the lithium battery protection board can sense this and quickly cut off the discharge power, so that the lithium battery will not discharge all the electricity, ensuring the stability of the internal current of the lithium battery and avoiding the occurrence of over discharge.

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