Detecting system of battery pack and battery power supply system

Abstract

The invention provides a detecting system of a battery pack. The battery pack comprises a plurality of battery units which are connected in series through connecting wires, the detecting system comprises a plurality of first voltage detection devices corresponding to the battery units, and each first voltage detection device is connected in parallel with a corresponding battery unit through two detecting wires respectively; the detecting wires are directly connected with pole columns of the corresponding battery units to ensure that the first voltage detection devices directly detect the first voltage between the two pole columns of each corresponding battery unit. The invention also provides a battery power supply system. Therefore, by virtue of the detecting system of the battery pack and the battery power supply system, the voltage between two pole columns of each battery unit can be directly detected through the detecting wires, so that the voltage of each battery unit can be accurately detected, and the connection state of the battery pack can be judged.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a detection system of a battery pack and a battery power supply system. Background technique [0002] During the use of the battery, the battery is usually used in series to provide a higher output voltage and a larger power capacity to meet the demand for load driving. However, no matter whether it is a lithium rechargeable battery, a lead-acid rechargeable battery or a nickel-metal hydride rechargeable battery, due to the limitation of its process conditions, there are certain differences between the battery cells. Therefore, a voltage detection device is needed to detect the voltage of the battery cell in real time. [0003] See figure 1 , figure 1 It is a battery pack detection system in the prior art. like figure 1 As shown, the detection system 10 for a battery pack includes a plurality of voltage detection devices (not shown). Wherein, the battery pack inc...

AI Technical Summary

Problems solved by technology

Due to the voltage drop of the connecting lines 101, 102 and 103 and the voltage drop between the connecting lines 101, 102 and 103 and the pole contact surface, the voltage across the battery pack has a greater error

Furthermore, the detection system of the existing battery pack cannot judge the connection status of the battery pack. When the connecting wires 101, 102, and 103 are in poor contact with the poles, additional energy consumption will be generated due to the increase in the internal resistance of the battery pack.

[0004] Therefore, it is necessary to provide a battery detection system to solve the problem that the voltage detection device in the prior art cannot accurately detect the voltage of each battery cell

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