Matrix type lithium battery pack

The utility model discloses a matrix type lithium battery pack. The matrix type lithium battery pack comprises a plurality of cylindrical single battery cells in matrix type arrangement, wherein a battery subgroup is formed by each line of single battery cells; a plurality of battery subgroups are serially connected through nickel straps; the first line of single battery cells and the last line of single battery cells are led out through the nickel straps; the nickel straps are electrically connected with the battery subgroups through spot welding. The spot welding connection of the nickel straps and the single battery cells is firm relative to the spot welding connection of nickel wires, the flow areas of the nickel straps are greater than those of the nickel wires, and thus the pressure drop of the battery pack for the nickel straps is smaller than that for the nickel wires; therefore, when a greater current flows through the nickel straps, the heat quantity of the nickel straps and contact areas is relatively small, the electric energy is saved, and the service life is also prolonged.