Battery design of electric massage chair

September 15, 2022
Latest company case about Battery design of electric massage chair

With the continuous progress of society, the majority of consumers have higher and higher requirements for the quality of life, and pay more attention to healthy and comfortable environment. Some batteries are the special batteries of our company's massage chair manufacturers in Jiangsu Province. Our company adopts 18650 low power batteries for personalized customization.
1. Design requirements:
Electric massage chair is a product to relieve the pressure of urban life. Body massage and local massage, there are "knock, beat, soft, pinch" all kinds of techniques, so the requirements of the battery should be high, enough time. But sometimes considering the convenience of going out, so the requirements can not be large, the requirements of quantity can not be obtained. According to the requirements of various factors, our company chooses 18650 low magnification (3C) batteries. The battery designed by our company is small in size, light in weight, large in capacity and powerful enough. The maximum continuous working current can reach 6a, the peak value can reach 15a, the capacity can do 2.2A, and the massage time can reach more than 20 minutes. It can fully meet the power requirements of the product.

2. Design scheme:
1) protection board (PCM): safety performance is usually the most concerned problem of customers. Due to the chemical characteristics of the lithium battery itself, the protection board of the battery is equipped with safety measures such as overcharge protection, over discharge protection, over-current protection, short circuit protection and over temperature protection to ensure the safety performance of the battery in use, so as to avoid accidental combustion, explosion, etc DANGER.

2) voltage / current management module (IC): 7 Series ics of SeikoThe on-line and real-time monitoring of overcharge, over discharge, over-current, short current and other functions of the electric core is carried out. Make the core work in a safe, stable and efficient range. With temperature protection function
3) charger: constant voltage 29.5v charging, with communication function and electric quantity display.
4) lithium ion cell: ICR18650 / 2000mAh (multiplier cell)
5) field effect transistor (MOS): it is directly controlled by the protection chip in the circuit and plays a switching role in the charging and discharging process.

3. Electrical performance parameters:
No
Test items
minimum
Typical
maximum
Company
one
Charging voltage
twenty-nine
twenty-nine point four zero
twenty-nine point eight
V
two
Charging current
Constant current 0.5A
A
three
Continuous discharge current
Six
ten
A
four
Overcurrent protection
fifteen
A
five
Overcurrent protection delay
three
one point five
zero point five
S
Six
Single self consumption current (3.30v)
ten
fifteen
twenty-five
uA
Seven
Single section balance current (4.20V)
fifty-three
mA
eight
Single section balanced voltage
V
nine
Single section overcharge detection voltage
four point one eight
four point two zero
four point two five
V
ten
Overcharge recovery voltage
four
four point one zero
four point two zero
V
eleven
Overcharge detection delay
zero point five
one
two
S
twelve
Detection voltage of single section over discharge
two point six seven
two point seven five
two point eight three
V
thirteen
Overdischarge recovery voltage
two point nine zero
three
three point one zero
V
fourteen
Over discharge detection delay
zero point five
one
two
S
fifteen
Short circuit / over discharge / over current protection recovery
Automatic recovery of removed load after short circuit / over discharge / over current protection
sixteen
Floating charge protection
(in order to prevent the battery life from decreasing, when the charging power supply is connected for a long time, how much current the battery consumes shall not occur, and the battery power shall be replenished to full immediately.)
That is, charging needs to be turned off and on
seventeen
Internal resistance of protection line
fifteen

eighteen
Maximum temperature rise of normal current
sixty
ºC
nineteen
Discharge battery temperature protection
sixty
sixty-five
seventy
ºC
twenty
Operating temperature range
-20
twenty-five
eighty-five
ºC
twenty-one
Storage temperature range
-20
twenty-five
fifty
ºC