Lithium ion battery compound module

Abstract

The invention discloses a lithium ion battery compound module which comprises a plurality of sections of flexible packaging battery monomers (2) which are inserted into a shell (1), wherein a heat-conduction plate is sleeved on each battery monomer (2), and the battery monomers are arranged in parallel to form a battery pack body; an epoxy plate (6) is arranged at the top of the battery pack body, two rows of pole lug holes (5) are arranged on the battery pack body, a copper pole lug (3) and an aluminum pole lug (4) of each battery monomer respectively pass through the corresponding pole lug hole (5) and are fixedly and serially connected; a cover plate (10) is arranged above the epoxy plate (6), and an anode post (7) and a cathode post (9) arranged on the epoxy plate are respectively connected with the cathode of the first battery and the anode of the final battery; and a plurality of current outlet terminals (8) are arranged between the anode post (7) and the cathode post (9). The invention solves the problems that the flexible packaging lithium ion battery pack in the prior art is difficult to radiate, easy to be punctured, incapable of balancing the current, not strict in sealing, and the like and obtains the advantages of high specific energy, portability, flexible storage, and the like.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a combined lithium-ion battery module used as power for an electric vehicle. Background technique [0002] As primary energy such as oil, natural gas and other resources become more and more scarce, human beings are faced with severe challenges that the living environment may continue to deteriorate. In order to reduce energy costs and achieve sustainable development in the world, countries all over the world have carried out research on electric vehicles. The idea is to use high-power batteries as power systems to replace fuel engines in whole or in part. Choosing the right power battery has also become one of the keys to the development of electric vehicle technology. [0003] In order to reduce the weight of the car and improve the mobility of the electric car, it tends to choose a power source with high energy density and good power characteristics. For this reason, fle...

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Problems solved by technology

[0005] In order to solve the problems existing in the prior art, such as complex combination of soft-packaged batteries, poor safety and mechanical properties, the present invention provides a module suitable for soft-packaged (polymer) lithium-ion battery combinations, which is characterized in that it overcomes the limitations of soft-packaged structures. Strength defect, at the same time, the glass sintered battery pack cover structure is designed, which effectively avoids the influence of the external circuit through the internal connection, and at the same time, the external balance circuit can still be used for equalization, effectively improving the heat dissipation characteristics of the battery and the specific energy of the battery pack

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