![]() Ensure that the vent hose ( #1 in Figure 4) is sloped outside of the vehicle to avoid the risk of siphoning. Use a torque wrench to tighten the battery terminals to specification. Be careful whenever disconnecting or connecting the battery vents and the LIN bus electrical connector to avoid damaging them. Removal and installation of the battery is nearly identical to other types of batteries. This is because the BUE would not be recognized by the LIN bus, and fault codes would occur. Lithium-ion batteries cannot be replaced with other construction types. The integrated BUE is capable of monitoring and testing the battery for faults. How Do I Test/Replace a Lithium-Ion Battery? The lithium-ion battery should be charged only at a battery temperature of > 5☌. This applies whether charging the battery in or out of the vehicle. If the charging voltage is too high, the electronic disconnect switch can open, which generates a message in the instrument cluster.īefore charging a lithium-ion battery, adjust the charging voltage it must not exceed 14.0V. Existing chargers which are designed for lead-acid or AGM batteries will generate a charging voltage that is too high for the lithium-ion battery. Charging voltage and trickle charging voltage must be closely monitored or adjusted to avoid damaging the battery or the BUE.īMW recommends the use of one of the following chargers:īMW states that you must use the charging points in the engine compartment to prevent the BUE from malfunctioning. ![]() There are new requirements for charging lithium-ion batteries by the BMW group. Finally, it is responsible for activating the battery isolating switch if a fault is detected.Īll of these data points are accessible with a scan tool which is capable of communicating with the BMW CAN or LIN bus. It also monitors closed-circuit current, battery temperature, internal resistance, state of charge, battery condition, battery capacity, and data memory for battery information. LiFePO4 batteries are tough, damage-resistant, waterproof. The integrated BUE is responsible for a number of tasks, including communication and wake-up function via LIN data bus, and monitoring the voltage and current supplied by individual cells and the battery overall. Our 12V LiFePO4 lithium deep cycle batteries have been designed with the Australian outdoors in mind. Electronic disconnect switch (two relays) /rebates/2fb2fElectrical-Batteries-12v-Batteries2fLithium-Ion2fN-5yc1vZ2fkolatZ1z0v1k4&.Battery supervision circuits (BUE) with precision resistor.Using Figure 3 for reference, locate the following components inside the lithium-ion battery:
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