Temperature adjusting system for power lithium battery pack and power lithium battery pack

The invention relates to a temperature adjusting system for a power lithium battery pack and the power lithium battery pack. The system comprises a battery box, phase-change energy-storage capsules and a plurality of heat pipes, wherein a plurality of lithium battery units are arranged in the battery box; the surfaces of all the lithium battery units are coated with thermal conductive coatings; the phase-change energy-storage capsules are filled into the battery box among the lithium battery units; the plurality of heat pipes are inserted among the lithium battery units; the circumferential wall of each heat pipe is in contact with the phase-change energy-storage capsules; and the two ends of each heat pipe are in tight contact with an upper cover and a bottom plate of the battery box respectively. A phase-change energy-storage material which has high heat-storage density and high chemical stability is integrated with a heat pipe technology, so that the heat-absorbing performance of the phase-change material can be brought into full play; the defects of low heat conductivity coefficient and low energy-storage rate of the phase-change material can be overcome; rapid response is available under the condition of high-power and large-current discharge of the power lithium battery pack; and the lithium battery pack is controlled to work safely in an optimal temperature range.