Robot lithium battery design requirements

According to customer's requirements and specifications, according to local conditions, design battery packs that meet the environmental requirements and match the host. Add the battery module heating module to the design. The equipment can be charged and discharged normally when the temperature exceeds -25 degrees. Solve the disadvantage of poor charging safety of ordinary lithium batteries below 0 degrees. Make the equipment run around the clock in extremely harsh environments.

Robot lithium battery design scheme

1) Sheet metal powder-sprayed shell: The sheet metal shell is exquisitely designed according to customer requirements, and the surface is sprayed with sub-black powder, which effectively protects the shell from oxidation and discoloration due to environmental influences. The sealing strip is designed to meet the requirements of waterproof, dustproof and shockproof. Four outlet holes for charging, discharging, temperature sensor and heating are reserved on the shell. The thermal insulation layer uses a thermal insulation material with a thickness of about 5mm. The outer box adopts the handle design, which is convenient for temporary transportation and use; the upper cover and the panel are flexibly disassembled, which is convenient for battery maintenance;

2) Protection board (PCM):

▪ Protection board design: The solution uses a high-precision detection BMS as the battery information collection unit, which has overcharge, overdischarge, overcurrent, short circuit, high and low temperature protection, and can balance the voltage and current of a single cell. .

▪ Heating part design: For pre-heating before low-temperature charging, we use 9pcs 5W flexible heating film in parallel, so that each large surface of the battery is heated by a heating film, and the pre-heating process is completed in about 30 minutes. In order to ensure the heating effect, when the ambient temperature in the battery box reaches 0°C, the customer's charging terminal will detect the 0°C signal and delay (10 minutes) for heating. The purpose is to ensure the consistency of the overall temperature of the battery.

3) Overcurrent protection chip (PTC): Mainly designed for secondary protection function. The PTC recoverable fuse has the dual function of overcurrent protection and automatic recovery. The PTC in battery products can prevent the occurrence of battery high temperature discharge and unsafe high current.

Design Features

▪ Long service life (the capacity is not less than 70% after 1000 cycles);

▪ Excellent working temperature (it can operate stably under the temperature condition of -20℃～+60℃ for a long time);

▪ Installing a battery detection unit in the battery pack can accurately detect battery voltage, temperature, capacity and other conditions in real time, and transmit it to the main system through the communication system in time, which can fully improve the safety of the product's work;

▪ The battery pack shell is designed with sheet metal material, which has superior impact resistance and high and low temperature resistance, effective flame retardant high performance, which can ensure that the battery pack always maintains effective protection ability under external impact;