Battery

Abstract

The invention provides a battery pack, comprising a plurality of single batteries; the single battery comprises a battery shell, an electric core and an electrode terminal; the electric core is contained inside the battery shell; the electric core comprises an anode pole shoe, a cathode pole shoe and a diaphragm which is arranged between the anode pole shoe and the cathode pole shoe; the electrode terminal comprises an anode terminal and a cathode terminal; the anode terminal is connected with the anode pole shoe; the cathode terminal and the cathode pole shoe are electrically connected with each other; the single batteries are connected with each other in series or in parallel by the electrode terminal; wherein, the electrode terminal is a sheet-shaped body; the connection relation of the electrode terminals is bonding connection. The battery pack of the invention has small internal resistance and reliable connection.

Description

technical field [0001] The present invention relates to a battery pack. Background technique [0002] With the improvement of people's awareness of environmental protection, electric vehicles or hybrid vehicles will replace the current fuel vehicles will be a development direction in the future. As the core power source of electric vehicles, the importance of the power battery pack is particularly prominent. A power battery pack can be formed by connecting multiple single cells in series or in parallel. [0003] CN 1767245A discloses a battery assembly comprising a plurality of unit cells 1 arranged in a casing. Each unit cell includes a positive terminal 2 and a negative terminal 3 protruding therefrom, and a connection member 20 connecting the positive terminal 2 and the negative terminal 3 of adjacently arranged stacked unit cells. The connecting piece also includes a fixing piece 21, external threads are formed on the positive terminal 2 and the negative terminal 3, in...

AI Technical Summary

Problems solved by technology

In the above-mentioned battery assembly, the positive terminal and / or negative terminal and the fixing part of the connector are screwed, and the contact internal resistance is large. If there is looseness between them, the contact internal resistance will be even greater, so the internal resistance of the battery assembly Larger; in addition, because each single battery requires positive and negative terminals with external threads as conductive elements and connecting pieces for series connection, the weight and volume of the battery pack are relatively large

Images