Reasons for insufficient charging of lithium batteries.
Firstly Lithium batteries cannot be charged.
The lithium battery pack in pure electric vehicles cannot charge the battery during charging, which can be divided into: incorrect wiring or mismatched charging heads; Rainproof board or lithium battery protection board is damaged and ineffective; Lithium batteries and high-power electrical appliances are short circuited externally.
After resolving the safety hazard, search sequentially for: whether the charging head is connected incorrectly, whether the positive and negative power plugs for charging the lithium battery are connected incorrectly; Eliminate maintenance of lithium battery protection boards for household appliances, restart MOS transistors, and accurately measure whether MOS transistors have driver operating voltage; Check if the circuit is damaged.
Secondly, lithium batteries cannot discharge.
In pure electric vehicles, lithium battery packs cannot be charged and discharged normally during application due to the following reasons: the working voltage of lithium battery packs used for rain screen maintenance or control panel maintenance is low; Damaged rain shield or control panel; The positive and negative charging and discharging connections are incorrect; Route interruption or power switch not turned on.
Due to poor conditions, it can be resolved by charging the lithium battery, finding a heat shield or routing connection.
Thirdly, lithium batteries are not sufficient.
When the cycling system uses a pure electric vehicle lithium battery pack, the charging of the battery will be terminated when the battery has not reached all the cut-off operating voltages of the lithium battery pack. This is because the power consumption or volume of individual strings in a lithium battery pack is not consistent. Those with high power consumption or small volume are charged first and then maintained by the lithium battery protection board, so that the rechargeable batteries of other strings can terminate the entire battery charging process before being fully charged.
In this case, a balanced charging head can be used to charge the batteries of the lithium battery pack to maintain consistent operating voltage for each string. If there is a significant difference in volume, it is necessary to replace the rechargeable battery with a significantly different one. But the key is that before assembling the lithium battery, it is necessary to conduct a volume check and matching of the lithium battery, otherwise it is not convenient to disassemble it in series.
Fourthly, the battery life is short.
The lithium battery pack in pure electric vehicles will quickly release current when applied because the rechargeable battery is not fully charged; The volume change of single string working voltage is significant; The micro short circuit fault of the lithium battery pack or the large amount of self discharge current of the lithium battery pack causes the power consumption of the lithium battery pack to be exhausted just after filling. For the above-mentioned defective rechargeable batteries, lithium batteries can be charged or replaced with defective rechargeable batteries.
Fifth The voltage of lithium batteries is unstable.
The lithium battery pack of pure electric vehicles is composed of several lithium batteries connected in series and parallel, which requires high consistency of the lithium batteries. Although the manufacturer of the lithium battery group has matched the lithium batteries, due to errors in the rechargeable batteries, the lithium battery group can cause inconsistent operating voltages throughout the long-term use of various series of rechargeable batteries, which can then be output to the lithium battery.
