Structure of secondary battery

Secondary battery structure

This creation is to provide an innovative structure of a secondary battery, especially a secondary battery structure with a simple structure, suitable for standardized production, and highly reliable electrical connection structure.

According to the characteristics of secondary batteries due to their high energy density and recyclability, they are currently widely used. For example, many electric power tools, such as electric hand tools, electric vehicles, or 3C products, use secondary batteries as their power source. Furthermore, for general battery manufacturers, if there is no special demand for use, most secondary batteries take into account the sealing and cost issues, and most of them will be manufactured using the traditional cylinder sealing method for reasons other than the reliability of the cylinder sealing. When the current demand of the equipment is large, it is only necessary to stack and merge most cylindrical secondary batteries, and then use a welding method to connect wires or conductive sheets in series between the terminals of these batteries and package them. After the battery module is formed, it can supply a large current output. Not only the gap between the batteries can make the battery module have better heat dissipation, but also this operation method is economical and affordable.

However, the equipment using secondary batteries is as small as a camera and as large as an electric car or motorcycle. Most of the devices must be moved normally. Therefore, the battery module is subject to high vibration frequency. For example, traditional methods of welding and fixing wires or conductive sheets are used. There are often situations where the solder joints are not resistant to frequent vibrations and fall off. In addition, the equipment with larger current needs more battery phases connected in series. In addition to a higher defect rate, the increase in solder joints also affects the current output. effect.

In view of this, this creation is to provide a secondary battery structure to improve the reliability of series and parallel connection between batteries and improve the lack of knowledge.

The main purpose of this creation is to provide a secondary battery structure with good reliability in series and parallel connection, which improves the product yield, and is more suitable for devices with frequent movements and vibrations.

The secondary purpose of this creation is to provide a secondary battery structure that is simple in structure and can be operated consistently and is suitable for mass production at low cost.

In order to achieve the above purpose, the secondary battery pack provided by this creation includes: a power storage body having two end caps, each of which has a groove on the inner surface and a perforation communicating with the groove; and two terminal sets, etc. They include a bolt and a pressing piece that can be combined with this bolt, and the two terminal groups correspond to the two end caps, and the bolts pass through the perforations of the end cap. Each bolt has a head part in the groove of the end cap, and The pressing member is combined with the bolt from the outside of the end cover. In this way, the external electric wire can be firmly fastened between the pressing member and the power storage body, thereby enhancing the reliability of the electrical connection of the battery.

In the following, detailed descriptions will be made through specific embodiments in conjunction with the accompanying drawings to make it easier to understand the purpose, technical content, features and effects of the present invention.

Refer to the first figure, which is a schematic diagram of the secondary battery structure of this creation. The battery structure 1 includes: a power storage body 2 and a two terminal group 4. Among them, the electric storage body 2 is cylindrical in shape, and is packaged in an aluminum case. Each end is provided with an end cover 21, and each end cover 21 forms a hexagonal groove 23 on the inner surface, and a circle is connected to the center of the groove 23. shaped perforation 25, the storage body 2 may be nickel-hydrogen batteries, nickel cadmium batteries, lithium batteries or the current high-profile lithium iron phosphate such as a battery, and can be used in digital cameras, electric tool or an electric steam, machine, bicycle, since the internal The power structure is different for each type of battery, and is not the focus of this creative work, so I will not repeat it here. In addition, each terminal group 4 includes a bolt 41, a washer 43 and a pressing member 45; and the bolt 41 is conductive and has a head 411 at one end, which is generally hexagonal and slightly thick; The pressing member 45 is a nut in this embodiment, which can be locked with the bolt 41.

When assembling, the secondary battery structure 1 of this creation is to first pass the bolt 41 through the perforation 25 of the end cover 21, so that its head 411 is submerged in the groove 23, because the head 411 of the bolt 41 and the groove of the end cover 21 23 is a polygonal shape that echoes each other. Therefore, the bolt 41 must not be allowed to rotate relative to the end cover 21. Of course, the shape of the groove 23 and the head 411 of the bolt 41 need not be hexagonal, as long as the bolt 41 can be restricted from turning. After the end cover 21 is combined with the body of the power storage body 2, the two bolts 41 are electrically connected to the positive and negative conductive electrodes of the power storage body 2, respectively. Next, the gasket 43 is placed on the bolt 41 outside the end cover 21 and locked. The pressing piece 45 completes the secondary battery structure 1 of this creation. As shown in the application diagram shown in the second figure, when the power output is large, most of the battery structure 1 can be pushed and used in combination, and the electric wire or the conductive sheet 30 is locked on the electric storage body 2 by the pressing member 45, and the gasket 43 can disperse the pressing member 45 to apply stress to avoid deformation of the end cap 21, and increase the number of series-parallel battery structures 1 according to different power requirements such as 12 volts, 24 volts, or 48 volts.

From the above, when it can be understood that the creative secondary battery structure can provide a more stable electrical connection bonding structure, not only effectively solving the problem that the conventional welding point is easy to fall off due to vibration, but also no poor contact, so the battery The increase in the number of combined groups does not affect the quality of the output current. In addition, because the structure is simple and easy to assemble, it is suitable for standardized processes and mass production at low cost. Compared with the past, it is more suitable for devices with frequent movement and vibration. The above embodiments are only for explaining the technical ideas and characteristics of this creation. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. When the scope of the patent for this creation cannot be limited, that is, Dafanyi Equal changes or modifications made to the spirit revealed in this creation should still be covered by the patent of this creation.

<p>1 secondary battery structure</p><p>2 power storage body</p><p>21end cap</p><p>211groove</p><p>213perforation</p><p>4Terminal Set</p><p>41 Bolt</p><p>411Head</p><p>43Gasket</p><p>45 Urgent</p><p>30Conductive sheet</p>

The first figure is a schematic structural diagram of an embodiment of the present invention.

The second picture is a schematic diagram of the secondary battery strings connected in parallel.