18650 Battery Holder 74V BMS 20S 30A 100 Battery Pack Lithium Battery Balance Diy Ebike Electric Car Bicycle 18650 Battery Box

The biggest benefit of this product is that it is welding-free, assembled without any solder at all, and can be directly output by installing the battery directly. This battery is made up of 20 batteries in series, which are on both sides of the circuit board, which can reduce the volume, effectively make use of the area of the circuit board, improve the performance-price ratio and reduce the cost. Take 3000 milliamps per battery as an example, a circuit board full of batteries is 74 volts, 4s2p is 74v6ah, and 4s4p is 74v12ah, and the number of battery boxes can be stacked arbitrarily according to your actual needs. The protection plate has the functions of charge-discharge protection, discharge current protection, temperature protection, voltage equalization and balance punching, and the protection current upper limit 100a is provided with a balance indicator lamp. Each circuit board has a 15A insurance that if one battery fails, it will not affect the others.

Product parameters

Voltage: Rated voltage 74 V, out of 58v, full of 84v Electricity :It depends on battery performance

Direction for use

Upon receipt, the battery can be installed directly. The orientation and polarity of the battery installation shall be subject to the symbol on the circuit board. After the battery is installed, the slot is in the same direction, and the copper column is screwed on. Recently, we found that our battery box product has been inquired by many customers, who are not very understanding of the use of this battery box. Here we add a new instruction of using tips. The upper and lower layers are superimposed to increase the capacity without changing the voltage. When installing batteries, the positive and negative orientations of the batteries must be the same, and the positive orientations of all batteries must be on the same side. The output power of the battery box is determined by the performance of the battery. The better the performance of the battery, the greater the output current. The voltage will change during the battery charging or discharging process, and the protection plate of the product does not have the function of stable output voltage. The voltage of the battery full is different from that of the battery after discharging, so the voltage will change.

First, determine the capacity you need.

1. If you use it as a pure battery energy storage, take each battery 3000 mah (3AH) and ordinary lithium battery rated at 3.7v as an example, with 100% ideal conversion efficiency. (1) 3s is 3.7v* 3 section =11.1v capacity 3000MAH energy 3.7u 6 section 3AH=66 6WH. (2)6s each layer is 3.7v*6 sections =22.2v capacity 3000MAH energy 3.7v*6 sections *3AH= 66.6WH. (3) according to your capacity requirements to buy the corresponding number of layers. 2. You need to know the power life of the appliance if you are using it as a backup power source or as a reserve battery for uARS. Take each battery3000 mah (3AH), ordinary lithium battery rated at 3.7v, 100% ideal conversion efficiency. (1) a 100w electrical appliance needs 100WH/ 11.WH =9 batteries for 1 hour. 100w of electrical appliances use 2 hours need: 100wH 2/ each 11.1wh = more than 18 batteries,and so on. (2) use of 500w electrical appliances for 1 hour: 500wH/1, 1.1wh per unit = more than 45 batteries. 500w electrical appliances need :500wH'2/ 11.1wh per unit = more than 90 batteries,and so on. (3) choose different Numbers of panels after knowing the number of batteries.

After knowing the capacity, it is necessary to determine the voltage or power supply mode of the appliance.

(1) if you want to use it as a charging treasure for mobile phone or other SB charger, you need to buy a buck usB module to use 12 or 24v buck to 5v (available in this store). (2) if you want to supply power to dc appliances or modules, you need to buy booster modules if the voltage of the appliance is high and the voltage of the battery box is lower than the voltage of the battery box. If the voltage of the appliance is within the range of the battery box voltage, you will need to buy voltage lifting modules. Above is the battery box output using tips.

Here are battery pack charging tips:

1. The charging limit of battery box protection board is 8A. The charging current of each layer of battery is not recommended to exceed two amps. If it is a two-layer battery, it is recommended to choose a charger within 4A. And so on, if the current is too high, it will cause the battery to heat up or damage. 2, the charger must choose constant current charger, can not choose constant voltage power supply, constant voltage power supply will cause a large battery heat. 3. If there is no charger with appropriate voltage or only constant voltage power supply, you can choose our constant current lifting voltage module to change the ordinary constant voltage power supply into adjustable current constant current power supply. 4. If you are using solar panels to charge the battery, you need to prepare your own voltage regulator module. If the output voltage of solar panels is too low, you need to add a voltage booster module; if the output voltage of solar panels is too high, you need to add a voltage step- down module.

Matters needing attention

1. It is better to place the order together with the protection plate to avoid over-charging and over-discharging and unbalanced voltage in the process of use. 2. It is better to choose our dedicated charger. If there are other chargers, we need to choose DC connector. 3. The charger needs to choose 84v charger. It is recommended that the charging current of each layer shall not exceed 1a.