7S14P 25.2VLithium Battery packed Designed Scheme for Catering Robot

In recent years, due to factors such as aging population and labor shortage, the cost of employment has increased year by year, more and more companies are more inclined to use service robots to replace human work, some repetitive and tedious labor may be replaced by service robots in the future.

Battery design requirements of Catering Service Robot：

As one of the hottest robots in the world, catering service robots have been on duty one after another, not only are the food delivery efficiency high, but the rental costs are low, more importantly, they can achieve autonomous walking and self-service delivery services without excessive human intervention, this greatly reduces the use cost of enterprises. According to restaurants that have used catering robots, catering robots can deliver more than 300 dishes per day on average. During peak periods, the delivery trays exceed 450 dishes, which is 1.5-2 times the efficiency of human food delivery staff. More importantly, the cost of renting a robot in a restaurant is only 99 Yuan/day, which is much lower than the salary of a waiter and enough for most restaurant operators to bear.

So how to design as many batteries with larger capacity as possible in the limited space for battery placement to meet the food delivery efficiency of the catering robot?

To this end, our company use new imported 18650 battery cell, which has advantages of high energy ratio, lightweight, small size, high cycle life, high safety, and high voltage consistency, etc., which can fully meet the power requirements of the instrument;

The protection circuit uses the protection board designed by our company: the protection board IC uses imported chips from Japan with high precision and high-temperature resistance, the protection board has a balanced charging function to improve the consistency of the battery and enhance the battery life; it has also temperature control protection, the voltage will be restored automatically after disconnection!

The specific design requirements are as follows:

• Design for Lithium battery pack :
  • Battery voltage and capacity can be customized, the size of the battery will change according to the actual voltage and capacity and the final specific design will prev
  • Example: 18650-7S14P-25.9V-35Ah

• Design requirements of Protection circuit (with protection functions such as balance, overcharge, over – discharge, over – current ,over – temperature and short circuit, etc.):

1. Voltage

Charging voltage DC: 29.4V CC / CV

Single cell balanced voltage 4.20 ± 0.025V

2. Current

Single cell balanced current 84 ± 10mA

Current consumption (self-consumption) ≤20μA

3. Over-charge protection (single section)

Over-charge detection voltage 4.275 ± 0.025V

Over-charge detection delay time 0.5S-2.0S

Over-charge recovery voltage 4.175 ± 0.025V4

4. Over-discharge protection (single section)

Over-discharge detection voltage 2.50 ± 0.05V

Over-discharge detection delay time 10mS-200mS

Over-discharge recovery voltage 2.40 ± 0.05V

5. Over-current protection

Over-current detection voltage 0.10 ± 0.015V

Over-current detection current 65 ± 10A

Over-current detection delay time 5ms-20ms

Recovery status – Disconnect the load and recover automatically

6. Short circuit protection

Detection status – External short circuit

Detection delay time 200-500us

Recovery status – Disconnect the load and recover automatically

7. Internal resistance – Protection circuit (MOSFET)≤30mΩ
8. Temperature control

Over-temperature protection range 75 ± 5 ℃

3) Battery drawing example:

4) Physical rendering picture of battery：