Why is the lithium battery not fully charged

1、 Lithium battery pack cannot be charged.

The lithium battery pack in pure electric vehicles cannot be charged when the battery is charged. The reasons can be divided into: wrong connection of the charging head or common failure of the charging head; Rain shield maintenance or lithium battery protection board is invalid; There is a short circuit between the lithium battery pack and the high-power electrical appliance.

After the safety hazards are solved, search successively: whether the charging head is connected incorrectly, and whether the positive and negative power plugs of the lithium battery pack are connected incorrectly; Eliminate the maintenance of the lithium battery protection board of household appliances, restart the MOS tube, and accurately measure whether the MOS tube has the working voltage of the driver; Check if the wiring is broken.

2、 The lithium battery cannot be discharged.

The lithium battery pack in pure electric vehicles can not be charged and discharged normally during application. The reasons are as follows: the working voltage of the lithium battery pack is low, and the maintenance of the rain shield or the control panel; The rain shield or control panel is damaged; Wrong connection of positive and negative stage charge and discharge; The line is disconnected or the power switch is not turned on.

In view of the poor condition, countermeasures such as charging the lithium battery pack battery, finding the thermal insulation board or route connection can be adopted.

3、 Insufficient charge of lithium battery

When the pure electric vehicle lithium battery pack is applied in the circulation system, the battery charging is terminated without all the disconnected working voltage of the lithium battery pack. This is because the single string power consumption or volume of the lithium battery pack is inconsistent. Those with large power consumption or small volume are charged first and then maintained with the lithium battery protection board, so that the whole process of battery charging can be terminated before other string charging batteries are filled.

In such cases, the balanced charging head can be used to charge the lithium battery pack, so that the working voltage of each string is consistent. If the volume is very different, it is necessary to replace the charging batteries with very different volumes. However, the key is to carry out volume inspection and matching capacity division for lithium batteries before the assembly of lithium batteries, otherwise it will be inconvenient to disassemble them in series.

4、 Short endurance.

The lithium battery pack in pure electric vehicles will quickly release current when applied. The reasons are: the rechargeable battery is not filled; The working voltage volume of a single string varies greatly; The micro short circuit fault of the lithium battery pack or the large self discharge flow of the lithium battery pack cause the power consumption of the lithium battery pack to be exhausted just after filling. For the poor rechargeable battery, the lithium battery can be recharged or replaced.

5、 Lithium battery voltage is unstable.

The lithium battery pack of pure electric vehicles is composed of several lithium battery cells in series and in parallel, and the consistency of lithium battery cells is very high. Although the manufacturer of lithium battery pack has done the matching of lithium battery cells, due to the error of rechargeable batteries, the working voltage of each series of rechargeable batteries will be inconsistent in the whole process of long-term application of lithium battery pack, resulting in the reduction of the whole set of kinetic energy output to the lithium battery pack, Then there will be problems such as suddenly turning off the power supply during the application, sharply decreasing the schedule, dissatisfied with the charging, and unable to charge the battery.