Patent Application
20190319227
The present invention relates to a cover of a power battery and a manufacturing method thereof, and more particularly to a cover of a power battery that can make the power battery well-sealed without complicated assembly.
Power batteries are characterized by high capacity and high energy density. Consequently, power batteries have become the main power-supply technique for products which consume large amounts of energy, such as electric vehicles, vacuum cleaners, etc. As environmental consciousness rises and the energy revolution takes place, the rapid development of electric vehicles cause large demands for power batteries.
A conventional power battery comprises a shell, a battery module, and a cover. The shell has a chamber and an opening communicating with the chamber of the shell. The battery module is deposited in the chamber of the shell via the opening. The cover is detachably mounted to the shell to cover the opening of the shell, and is electrically connected to the battery module. Then, the battery module may connect with outer electrical components to supply electrical power.
With reference to
The two electrodes 70 are respectively a positive electrode and a negative electrode. Moreover, the two electrodes 70 are mounted to the base panel 60 and electrically connected to the battery module of the conventional power battery. Each electrode 70 serially passes through one of the two holding rings 61, a corresponding sealing element 62, and a corresponding through hole 601, and is fastened by a corresponding locking element 63.
By the assembly of the two holding rings 61, the two sealing elements 62, and the two locking elements 63, the cover is able to mount to the conventional power battery tightly and prevent air or liquid from passing through the cover of the conventional power battery.
However, the cover of the conventional power battery has the following shortcomings.
1. The assembly of the cover of the conventional power battery tends to be time-consuming due to the complicated structure and the series of the components.
2. There still exist gaps between each component and an adjacent component, and the leakage of air and liquid passing through the gaps may cause oxidization and rust to the battery module of the conventional power battery or outer electrical components.
The main objective of the present invention is to provide a cover of a power battery and a manufacturing method thereof that has a preferred effect of leakage prevention and improves the complicated assembly of the cover of the conventional power battery.
The manufacturing method of a cover of a power battery comprises a preparing step and an injection-molding step. In the preparing step, prepare a plate and two electrodes, wherein the plate has two through holes formed through and disposed on the plate at a spaced interval, the two electrodes each respectively have a positive electrode and a negative electrode, and each electrode passes through a respective one of the two through holes. In the injection-molding step, put the plate and the two electrodes into a mold, wherein two sealing pieces made by molten plastic materials are respectively formed between the two electrodes and the plate, so as to mount the two electrodes to the plate, and become the product of the cover of a power battery.
The cover of a power battery is used to connect a battery module of the power battery and outer electrical components, and comprises a plate, two electrodes, and two sealing pieces. The plate has an upper surface, a lower surface, and two through holes. The two through holes are formed through the upper surface and the lower surface of the plate at a spaced interval. The two electrodes are respectively disposed in the two through holes of the plate, wherein each one of the two electrodes passes through a corresponding through hole and protrudes from the upper surface and the lower surface of the plate. The two sealing pieces are respectively mounted to the two electrodes and the plate, and each one of the two sealing pieces is deposited between a corresponding electrode and a corresponding through hole.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
A. A preparing step: with reference to
The two electrodes 20 are mounted to the plate 10 and are respectively a positive electrode and a negative electrode. Each electrode 20 has two ends, an outer connector 21, and an inner connector 22. The outer connector 21 and the inner connector 22 are respectively located on the two ends of the electrode 20. The outer connector 21 comprises a screw recess 211 and a protruding part 23. The screw recess 211 is formed in a top end of the outer connector 21, and the protruding part 23 is annularly formed on and protrudes from the outer connector 21 adjacent to the top end of the outer connector 21. The inner connector 22 is deposited at the other end of the electrode 20 opposite to the outer connector 21.
B. An injection-molding step: with reference to
Gaps formed between the plate 10 and the two electrodes 20 are filled with plastic materials which compose the two sealing pieces 30. Therefore, the two sealing pieces 30 enable the preferred embodiment to isolate the outer space from the inner space of a power battery, and further to prevent air or liquid leakage from damaging the battery module of the power battery.
With reference to
The plate 10 is used to mount on a shell of a power battery and to cover an opening of the shell. The plate 10 has a lower surface, an upper surface, two through holes 11, and two grooves 12. The two through holes 11 are respectively formed through the upper surface and the lower surface of the plate 10, and are disposed on the plate 10 at a spaced interval. The two grooves 12 are formed in the upper surface of the plate 10, and respectively surround the two through holes 11 such that each groove 12 is concentric to a corresponding through hole 11.
The two electrodes 20 are mounted to the plate 10. The two electrodes 20 are respectively engaged in the two through holes 11 and protrude from the upper surface and the lower surface of the plate 10. Furthermore, the two electrodes 20 are respectively a positive electrode and a negative electrode. Each electrode 20 has two ends, an outer connector 21, and an inner connector 22. The outer connector 21 and the inner connector 22 are respectively located at the two ends of the electrode 20. The outer connector 21 protrudes from the upper surface and a corresponding groove 12 of the plate 10. The outer connector 21 comprises a screw recess 211 and a protruding part 23. The screw recess 211 is formed in a top end of the outer connector 21. The protruding part 23 is annularly formed on and protrudes from the outer connector 21 adjacent to the top end of the outer connector 21. Moreover, an outer diameter of the protruding part 23 is smaller than an inner diameter of a corresponding through hole 11. With reference to
With reference to
With the aforementioned technical characteristics, the cover of a power battery and a manufacturing method thereof have the following advantages.
1. The two one-piece sealing pieces 30 allow the cover to isolate the outer space from the inner space of the power battery, and further to avoid air or liquid leakage.
2. Diameters differ among the protruding parts 23, the grooves 12, the through holes 11, and the inner connectors 22. And that makes the two sealing pieces 30 closely engaged with the plate 10 and the two electrodes 20, and further enhances the effect of leakage prevention.
3. In addition, the injection molding simplifies the complicated assembly of the conventional cover of a power battery, which makes the process of producing the cover of a power battery of the present invention more efficient and more convenient.
Even though numerous characteristics and advantages of the present utility model have been set forth in the foregoing description, together with details of the structure and features of the utility model, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
