Want to buy a new energy car, can you really understand the lithium battery?

1. Lithium battery technology

Lithium batteries have been used in electric vehicles, and today lithium batteries are more used on low-voltage networks.

The advantage of the lithium battery is that the number of charging cycles is high, there is no memory, and the high energy density reduces the weight.

The low-voltage lithium battery is used on the BMW F80/F82/F83. The lithium battery of the above model is taken as an example.

2. Battery model

Capacity: 69Ah

Rated voltage: 13.2V (4 3.3V single cells in series)

Housing: LN5 (same as AGM 90Ah battery)

Weight: 13.6kg

Design: 4 single cell lithium phosphate

Vehicle used: F80, F82, F83

Price: about 5 times that of lead-acid batteries

Features:

Internal with separate switch

Integrated control module communicates via LIN line

Need to use a suitable charger

Battery vent line diameter becomes larger

Want to buy a new energy car, can you really understand the lithium battery?

3. Structure of lithium battery

Shunt resistor: measuring current

Single cell: 4 battery modules (anti-shock) in a steel frame.

Separation switch: double relay

BMS (Battery Management System): Battery Manager, including LIN line detection with IBS and battery management functions (eg battery module voltage balance)

Want to buy a new energy car, can you really understand the lithium battery?

4. Shell

The lithium battery is the same size as the 90Ah lead-acid battery for easy installation.

Want to buy a new energy car, can you really understand the lithium battery?

The vent hole diameter is much larger at the red mark position in the figure. The battery surface has a LIN connection interface to the internal control module.

5. Top cover

Want to buy a new energy car, can you really understand the lithium battery?

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Features:

  • With multi-core(2-8 core) design to fit with different industrial needs
  • Design snap lock ensures stable and security firm
  • Humanization design achieved blind operation
  • Both soldering and crimpng are avaliable
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  • Gold-plated, high strength corrosion resistance and electrical conductivity
  • Shell made of material PBT, Stable electrical performance, high strength and resistance to pressure, high temperature resistance, anti-explosion, anti-corrosive
  • Both cable connector to cable connector and cable connector to panel mounting are available

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