Parameters and applications of MP144350 medium-sized lithium ion battery

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In recent years, with the development and advancement of lithium ion battery materials, process technology and equipment, and the rapid development of portable electronic products, the performance of lithium ion batteries has been continuously improved and the variety has been continuously increased.

Compared with the previous years, the performance of the lithium-ion battery has been significantly improved, as shown in the following table.

In addition, batteries of different packages and capacities have been developed depending on the conditions of use of electronic products. For example, small button-type lithium-ion batteries (volumes are 1/3 of nickel-cadmium and nickel-hydrogen batteries), small cylindrical or rectangular lithium-ion batteries, medium-sized and large-capacity lithium-ion power batteries to meet the needs of different electronic products. This article describes the medium-sized lithium-ion battery MP144350 produced by SAFT.

MP144350 medium-sized lithium-ion battery

The MP144350 is a high performance medium sized rechargeable lithium ion battery. The main features of the battery: wide operating temperature range, suitable for harsh weather conditions; easy to assemble into small and lightweight battery pack; high energy density: volumetric energy density 344Wh / cubic centimeter; mass energy density 143Wh / kg Excellent low temperature performance; excellent long-term storage, excellent charge recovery performance even at high temperatures; internal safety protection circuit; no maintenance; long charging and discharging cycle (battery life), at 100% discharge depth At the time of charging and discharging 500 times, the battery capacity has more than 80% of the initial capacity (indicating that the number of times of charging is more than 500 times). The battery is mainly used in small uninterruptible power supplies, power supplies for military equipment, portable radios, professional portable lighting power sources (such as miner's lamp, emergency light, emergency flash), bar code readers, portable instruments and portable payment terminal equipment.

The main parameters

The main parameters of MP144350 are: nominal voltage is 3.75V; rated energy is 10Wh; nominal capacity is 2.60Ah when charging to 4.2V, 2.35Ah when charging to 4.1V: termination charging voltage is 4.20 ±0.05V (constant current / constant voltage charging): the maximum charging current is 2.6A (1C charging rate); the charging temperature range is -20 ~ +60 ° C, when charging at 20 ° C, when the charging current is 1C, Charging time is 2~3h, C~3 is 3~4h, C/5 is 6~7h; maximum continuous discharge current is 5A (pulse discharge current can reach 10A); termination discharge voltage is 2.5V; discharge The temperature range is -50 to +60 °C.

Size and other related parameters

The shape and size of the MP144350 are shown on the right. The rectangular vertical side is semi-circular and has an outer dimension of 50 mm (length) x 43 mm (width) x 14.5 (height) mm: a typical weight of 68 g: a volume of 28 cubic centimeters.

Safety device

The MP144350 has a safety protection inside. It protects against overheating, short circuit protection, overcharge protection and overdischarge protection. This increases the security and reliability of use.

Typical charge and discharge characteristics

1. Charging characteristics The following figure shows the characteristics of charging at 1C, C/2 and C/5 at 20 °C (blue is 1C charging rate, green is C/2 charging rate, red is C/5 charging rate), Constant current, constant voltage charging. The curve shows the characteristics of voltage and current as a function of charging time. As can be seen in the figure: the time required to charge to full (4.2V). For example, when charging at a charging rate of 1 C, it takes about 2 to 3 hours.

2. Discharge characteristics at different discharge currents The graph below shows the characteristics at C/5, C/2, C, and 2C discharge rates at 20 °C. This feature is useful for electronics designers and battery users. It can be seen from Fig. 3 that at the discharge rate of 1 C, the discharge voltage of the battery changes relatively smoothly.

3. The discharge characteristics at different ambient temperatures are shown as different discharge curves with a C/5 discharge rate in the range of -50 to +60 °C. It can be seen from Fig. 4 that when discharging in the temperature range of +20 to +60 °C, the discharge characteristics are similar, while discharging at -40 to +50 °C, the performance is poor, the discharge voltage is low, and the energy of the battery Also reduced a lot. If you want to work in this temperature range, pay attention to whether the voltage and current can meet the requirements of the product.

Precautions during use

1. Can not be directly soldered on the positive and negative poles of the battery; 2. Can not break down the battery; 3. Can not remove the protection circuit; 4. Can not incinerate the battery; 5. The battery is stored in a dry place where the temperature does not exceed 30 ° C; When stored for a long time, the battery is charged to (30 ± 15)% state.