The invention discloses a
lithium-
ion power battery, which comprises an electric core, a
metal housing, an
electrolyte and a top cover fixedly connected to the
metal housing, wherein the electric coreincludes a positive
pole piece, a negative
pole piece and a diaphragm; the negative
pole piece includes a negative
current collector and a negative active material layer; and the positive pole pieceincludes a
positive current collector and a positive active material layer. The
lithium-
ion power battery is characterized in that both the positive pole piece and the negative pole piece are providedwith
heat conducting and colleting bodies, the
heat conducting and collecting bodies are parts uncoated with the active material layer on the front or / and the back of the
positive current collector and the negative
current collector, at least two
heat conducting and collecting bodies are laminated to form a
heat flow concentration channel, the
heat flow concentration channel is laminated or connected with heat pipes composed of a
pipe shell and a liquid absorbing core, the
heat flow concentration channel and the heat pipes form a heat flow concentration channel heat guide
pipe assembly, the positive
heat pipe and the negative
heat pipe are respectively located at the sides opposite to a positive pole lug and a negative pole lug, and the positive
heat pipe and the negative heat
pipe extendout of the battery housing. The
lithium-
ion power battery can effectively solve a problem that the battery temperature is too high or too low, and achieves the effects of controlling the temperatureand prolonging the battery life.