(Keyword: lithium battery for medical infusion pump) With the continuous improvement of people's living standard, medical services and medical products are improving, and traditional fixed medical equipment is constantly replaced by new medical products with high flexibility, high precision and intelligence. The new intelligent infusion pump replaces the traditional infusion method and can choose the infusion speed and method intelligently and reasonably according to the needs of different patients and move flexibly, which is convenient for different people to apply and operate in different environments in different places. Our medical infusion pump backup lithium battery provides continuous and stable power supply for fixed and mobile use of the infusion pump, and is in a safe, efficient, continuous and stable working condition at all times!

Design requirements for lithium batteries for medical infusion pumps：

Medical infusion pump is a new type of medical infusion intelligent medical products, due to the special nature of its application population and environment, the battery requirements are also very special, such as: the battery input and output must use the same port, in order to facilitate the safe and convenient operation of the relevant personnel; the battery must have charge and discharge power indication, the power indication must be always on, so that the patient and the relevant personnel observe at all times; the battery safety and fire rating must meet the special requirements of medical products, etc.

Li-ion battery pack type design requirements：

18650-2S4P/10Ah/7.4V

Input and output characteristics:

The same port is used for input and output, and the automatic switching function is adopted according to the special requirements of medical treatment.

1、Output characteristics: Without charging, the battery DC line output port automatically outputs 5V/2A characteristics.

2、Input characteristics: with 9V/2A adapter plugged into the DC output line, the battery is automatically charged.

3、 State characteristics: no output state when there is 9V/2A charging, automatically switch output 5V/2.5A state when 9V/2A is removed.

Item	Min.	Type value	Max.	Unit
Input Voltage	8.5	9	9.5	V
Input Current	1.8	2	2.2	A
Output Voltage	5.2	5.4	5.6	V
Output Current	0	2	2.2	A

Charge and discharge indication

One single-color light and one two-color light for high/medium/low battery capacity indication.

1、6.4V ±0.1V light on red

2、7.3V ±0.1V light on blue

3、7.9V ±0.1V light on blue (two green lights all on)

Discharge state

When the red light is off, it can still support the discharge for about 10-20 minutes.

Basic characteristics of the protection board

1、Single section overcharge protection voltage: 4.28±0.25V

2、Single section overcharge recovery voltage: 4.10±0.10V

3、Single section over discharge protection voltage: 2.80±0.08V

4、Single section over discharge recovery voltage: 3.00±0.10V

5、Combination battery overcurrent protection value (10ms): 8~12A

6、Over-temperature protection value of the combined battery (recoverable): 70±5℃

7、The finished battery is protected by short circuit and reverse charge.

Battery cycle life design requirements

300~500 times (national standard charge/discharge standard)

Battery external size design requirements

Lithium battery design for medical infusion pumps

Intelligent boost module circuit: mainly for the adapter input 9V/2A DC to DC conversion into a suitable for two series of lithium batteries CC/CV charging mode and two series of lithium batteries for buck into 5V/2A regulated output state. At the same time, it enables automatic switching of input and output states.

Protection board (PCM): It is mainly a protection circuit designed for rechargeable lithium battery pack. Due to the chemical characteristics of lithium battery itself, it is necessary to provide intelligent power calculation, overcharge, overdischarge, short circuit, overcurrent and other protection functions to avoid causing danger such as combustion and explosion.

Protection IC (Protection IC): The main protection function chip of the design solution, which monitors the overcharge, overdischarge, overcurrent, short circuit and other functions of the battery cell online in time, so that the battery cell works in a safe, stable and efficient range.

Temperature switch: mainly designed for temperature protection function. When the temperature of the battery itself reaches 70±5℃ range due to other abnormal problems, the temperature switch is activated for temperature protection.

18650 Li-ion cell/18650/2500mAh/3.7V Li-ion cell

Field effect tube (MOSFET): MOSFET tube, in the protection circuit to play a switching role, always so that the voltage at both ends of the load will not increase or decrease, to ensure voltage stability.

DC output line: plays the role of input and output of lithium battery state for medical infusion pump.

Battery casing: conforming to the fireproof group level of medical products, forming the molded shape of the overall battery.

Post time: May-16-2022