TWI766742B - Battery conductive frame - Google Patents

Abstract

A battery conductive frame is provided. The battery conductive frame comprises a conductive plate and a plurality of conductive handles. Each of conductive handles comprises at least one handle part and a fixed part. The handle part of the conductive handle is protrudes out from the conductive plate, and the fixed part of the conductive handle is covered in a body of the conductive plate. The handle part of each conductive handle is welded or contacted with a corresponding battery cell in a battery module. The melting point of the conductive plate is lower than the melting point of the conductive handle. The fixed part of the conductive handle is made in the body of the conductive plate by a sintering process. So, the battery conductive frame of the present invention can be easily manufactured by the sintering process, and a welding part between the conductive handle of the battery conductive frame and the battery core is not easy to loosen.

Description

Battery Conductor

The present invention relates to a battery lead frame, especially a battery lead frame applied to a battery module.

In recent years, with the demand for environmental protection and carbon reduction, electric vehicles have gradually attracted people's attention. Therefore, many car manufacturers have entered into the development of electric vehicles one after another, in order to seize business opportunities in the electric vehicle market.

The power source of the electric vehicle is the battery. In order to increase the endurance of the electric vehicle, a battery module with a considerable number of battery cells is usually arranged on the electric vehicle. In a battery module, these substantial numbers of cells will be connected together in series or in parallel. Further, the battery module includes a battery lead frame, and the battery lead frame includes a plurality of conductive handles. Each battery cell will be welded with a corresponding conductive handle in the lead frame, so that each battery cell can be connected together through the conductive handle of the battery lead frame.

Therefore, the present invention proposes a battery lead frame with an innovative structure, which is not only easy to manufacture, but also the welded part between the conductive handle of the battery lead frame and the battery core is not easily loosened when the battery lead frame is applied to the battery module. , will be the object of the present invention.

An object of the present invention is to provide a battery lead frame applied to a battery module, which includes a conductive plate and a plurality of conductive handles, the conductive handle includes at least a handle portion and a fixing portion, and the conductive handle is sintered in a sintering manner. The fixing portion is made in the body of the conductive plate, and the handle portion of the conductive handle protrudes out of the conductive plate, then, the handle portion of each conductive handle protruding from the conductive plate corresponds to a battery in one of the battery modules. core Welding or contacting; in this way, the battery lead frame of the present invention can be easily fabricated by sintering.

Another object of the present invention is to provide a battery lead frame applied to a battery module. The battery core of the corresponding battery module is welded through a plurality of welding points, so that the welded part of the conductive handle and the battery core is not easily loosened.

Another object of the present invention is to provide a battery lead frame applied to a battery module. The conductive plate of the battery lead frame is formed by a low-resistance, high-conductivity thick metal plate, so as to reduce the damage of the battery cells that are electrically connected. Ohmic loss, in addition, the high conductivity of the conductive plate means high thermal conductivity. When the battery module applied to the battery conductive frame is overheated, the heat generated by the battery module can be quickly spread on the conductive plate, so as to improve the use of the battery module. security.

In order to achieve the above purpose, the present invention provides a battery lead frame, comprising: a conductive plate; and a plurality of conductive handles, including at least one handle portion and a fixed portion, the handle portion of the conductive handle protrudes from the body of the conductive plate, The fixing part is wrapped in the body of the conductive plate; wherein, the melting point of the conductive plate is lower than the melting point of the conductive handle, and the fixing part of the conductive handle is made in the body of the conductive plate by a sintering method.

In an embodiment of the present invention, the conductive plate is made of copper, and the conductive handle is made of nickel.

In an embodiment of the present invention, the conductive plate includes a plurality of openings, and the handle of each conductive handle is disposed in the corresponding opening and protrudes out of the conductive plate through the corresponding opening.

In an embodiment of the present invention, the handle portion of the conductive handle is provided with at least one welding point, and the conductive handle is welded or contacted with the electrode end of the battery cell through the welding point on the handle portion.

In an embodiment of the present invention, the fixing portion of the conductive handle includes an extension portion and a tail portion, the extension portion is disposed obliquely between the handle portion and the tail portion, and the tail end portion is connected to the handle portion through the extension portion.

In an embodiment of the present invention, the conductive handle further includes a connecting portion, and the tail end portion of the conductive handle is connected to the tail end portion of another adjacent conductive handle through the connecting portion.

In an embodiment of the present invention, part of the extending portion will protrude out of the body of the conductive plate and be connected to the handle portion located outside the body of the conductive plate.

In an embodiment of the present invention, the conductive handle includes two handle portions, and each handle portion includes two welding points.

In an embodiment of the present invention, the conductive plate is a thick metal plate with low resistance and high conductivity, and the conductive handle is a conductive sheet with high mechanical strength.

In an embodiment of the present invention, the battery lead frame is applied to a battery module, the battery module includes a plurality of battery cells, and the handle of each conductive handle is welded or contacted with a corresponding battery cell in the battery module.

In order to make the above-mentioned and other objects, features and advantages of the present invention more apparent and comprehensible, a detailed description is given as follows in conjunction with the accompanying drawings.

100: Battery Conductor

10: Conductive plate

11: Opening

20: Conductive handle

21: Handle

211: Welding point

23: Fixed part

231: Extensions

233: tail end

25: Connection part

300: battery module

31: battery cell

FIG. 1 is a perspective view of a battery lead frame of the present invention from a first perspective.

FIG. 2 is a perspective view of the battery lead frame of the present invention from a second perspective.

3 is a perspective view of the conductive handle of the present invention.

4 is a side sectional view of a part of the structure of the battery lead frame of the present invention.

5 is a schematic cross-sectional view of the battery conductor frame of the present invention applied to a battery module.

In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail by the following specific embodiments and the accompanying drawings. The description is as follows.

Please refer to FIG. 1 to FIG. 4 at the same time, which are respectively a perspective view of the battery lead frame of the present invention from a first perspective, a perspective view of the battery lead frame of the present invention, a perspective view of the conductive handle of the present invention, and a partial structural cross-sectional view of the battery lead frame of the present invention. . As shown in FIG. 1 to FIG. 4 , the battery lead frame 100 of the present invention includes a conductive plate 10 and a plurality of conductive handles 20 . Each conductive handle 20 is positioned in the conductive plate 10 . The conductive handle 20 includes at least a handle portion 21 and a fixing portion 23 . The fixing portion 23 is connected to the handle portion 21 . The fixing portion 23 of the conductive handle 20 will be wrapped in the body of the conductive plate 10 , and the handle portion 21 of the conductive handle 20 will protrude out of the body of the conductive plate 10 . The battery lead frame 100 is applied to a battery module, and the handle 21 of the conductive handle 20 protruding from the body of the conductive plate 10 is used to weld or contact the battery cells of the battery module, so that the battery of the battery module can be electrically connected core.

Further, the fixing portion 23 is connected to a plurality of handle portions 21 , for example, the number of handle portions 21 is two, but the present invention is not limited thereto. Each handle 21 is provided with a plurality of welding points 211 , for example, the number of welding points 211 of each handle 21 is two, but the invention is not limited thereto. Each conductive handle 20 is welded or contacted with the corresponding battery cell of the battery module through the welding point 211 , so that the battery lead frame 100 and the battery module are electrically connected together. The conductive handle 20 is a conductive sheet with high mechanical strength (such as a nickel sheet), and each conductive handle 20 is welded to the battery core of the corresponding battery module through a plurality of welding points 211, so that the conductive handle 20 is welded to the battery core. Parts are not easy to loosen.

In addition, in the present invention, the conductive plate 10 is formed by a low-resistance, high-conductivity thick metal plate, so as to reduce the ohmic loss of the battery cells that are electrically connected; Therefore, when the battery module applied to the battery lead frame 100 is overheated, the heat generated by the battery module can be quickly spread on the conductive plate 10, so as to improve the safety of the battery module in use.

The fixing portion 23 of the conductive handle 20 of the present invention includes an extension portion 231 and a tail portion 233 . In an embodiment of the present invention, the handle portion 21 and the tail end portion 233 are arranged in parallel, the extension portion 231 is disposed obliquely between the handle portion 21 and the tail end portion 233 , and the tail end portion 233 is connected to the handle portion 21 through the extension portion 231 extending toward the handle portion 21 . Handle 21. In addition, in a preferred embodiment of the present invention, part of the extending portion 231 will protrude out of the body of the conductive plate 10 to be connected to the handle portion 21 located outside the body of the conductive plate 10 .

In addition, each conductive handle 20 further includes a connecting portion 25, and the tail end portion 233 of each conductive handle 20 is connected to the tail end portion 233 of another adjacent conductive handle 20 through the connecting portion 25, so that a certain direction ( For example, a plurality of conductive stems 20 in a column direction or a row direction) are connected to each other, so that a plurality of corresponding battery cells electrically connected to the plurality of conductive stems 20 can be connected in series or in parallel.

In an embodiment of the present invention, the conductive plate 10 includes a plurality of openings 11 , and the handle 21 of each conductive handle 20 is disposed in the corresponding opening 11 and protrudes out of the conductive plate 10 through the corresponding opening 11 . In this embodiment, the shape of these openings 11 can also be square and arranged in an array manner, but the present invention does not limit the shape and arrangement of these openings 11 . Of course, in another embodiment of the present invention, the conductive plate 10 of the present invention can also be a plate body with flat sides and no openings 11 , and each conductive handle 20 can also be positioned on one of the conductive plates 10 through the fixing portion 23 respectively. The handle 21 protrudes from the body of the conductive plate 10 at a corresponding specific position on the surface (eg, the upper surface).

In the present invention, the melting point of the conductive plate 10 is lower than the melting point of the conductive handle 20. For example, the conductive plate 10 is made of copper with a melting point of 1085 degrees, and the conductive handle 20 is made of nickel with a melting point of 1455 degrees. Materials. In the present invention, the battery lead frame 100 uses a sintering process to make the fixing portion 23 of the conductive handle 20 in the body of the conductive plate 10. During the sintering process, the formed conductive handle 20 is placed on a In the mold, then, the copper metal powder is sprinkled on the fixing portion 23 of each conductive handle 20 respectively, and then a suitable amount of copper metal powder sprinkled on the fixing portion 23 of the conductive handle 20 is applied. A suitable sintering temperature (eg 820-850 degrees) and/or a suitable pressing force, so that the metal powder of copper can be tightly coalesced around the outer periphery of the fixing portion 23 of the conductive handle 20 to form the conductive plate 10 . , the fixing portion 23 of the conductive handle 20 can be wrapped in the body of the conductive plate 10 .

Please refer to FIG. 5 , which is a schematic cross-sectional view of the battery conductor frame of the present invention applied to the battery module, and also refer to FIGS. 1 to 4 . In the process of assembling the battery lead frame 100 into the battery module 300, firstly, each conductive handle 20 of the battery lead frame 100 is positioned on top of each corresponding battery cell 31 in the battery module 300; The welding point 211 on the handle portion 21 of the conductive handle 20 is welded on the top electrode end of each corresponding battery cell 31; of course, the bottom electrode end of each battery cell 31 in the battery module 300 can conduct electricity with another battery The welding point 211 on the handle 21 of each corresponding conductive handle 20 of the frame 100 is welded (not shown), so that the top and bottom of the battery cells 31 of the battery module 300 are electrically connected through the two battery conductive frames 100 . The electrode terminals are used to form a circuit loop between the two battery lead frames 100 and the battery module 300 .

In view of the above, the present invention uses the sintering method to manufacture the battery conductive frame 100, and the battery conductive frame 100 is easy to manufacture, and has the characteristics of better mechanical strength, low resistance, high electrical conductivity and high thermal conductivity. When the battery conductive frame 100 is applied in In the case of the battery module 300, not only the stability of the welding portion between the conductive handle 20 of the battery lead frame 100 and the battery core 31 of the battery module 300 can be improved, but also the battery lead frame 100 can provide the battery module 300 with the safety when the battery module 300 is overheated. High thermal conductivity to increase the safety of the battery module 300 in use.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Modifications should be included within the scope of the patent application of the present invention.

100: Battery frame with sandwich structure

10: Conductive plate

11: Opening

20: Conductive handle

Claims (10)

A battery lead frame, comprising: a conductive plate; and a plurality of conductive handles, including at least one handle portion and a fixed portion, the handle portion of the conductive handle protrudes out of the body of the conductive plate, and the fixed portion is wrapped Covered in the body of the conductive plate; wherein, the melting point of the conductive plate is lower than the melting point of the conductive handle, and the fixing portion of the conductive handle is made in the body of the conductive plate by a sintering method. The battery lead frame of claim 1, wherein the conductive plate is made of copper, and the conductive handle is made of nickel. The battery lead frame of claim 1, wherein the conductive plate includes a plurality of openings, and the handle portion of each conductive handle is disposed in the corresponding opening and protrudes from the conductive plate through the corresponding opening outside. The battery lead frame of claim 1, wherein the handle portion of the conductive handle is provided with at least one welding point, and the conductive handle is welded or contacted with an electrode end of a battery cell through the welding point on the handle portion. The battery lead frame of claim 1, wherein the fixing portion of the conductive handle includes an extension portion and a tail portion, the extension portion is disposed obliquely between the handle portion and the tail portion, and the tail portion penetrates through The extension is connected to the handle. The battery lead frame of claim 5, wherein the conductive handle further comprises a connecting portion, and the tail portion of the conducting handle is connected to the tail end portion of another adjacent conducting handle through the connecting portion. The battery lead frame as claimed in claim 5, wherein part of the extension part will protrude out of the body of the conductive plate and be connected to the handle located outside the body of the conductive plate. The battery lead frame of claim 4, wherein the conductive handle includes two handle portions, and each handle portion includes two welding points. The battery lead frame of claim 1, wherein the conductive plate is a thick metal plate with low resistance and high conductivity, and the conductive handle is a conductive sheet with high mechanical strength. The battery lead frame of claim 1, wherein the battery lead frame is applied to a battery module, the battery module includes a plurality of battery cells, the handle portion of each of the conductive handles is in the battery module A corresponding one of the battery cells is welded or contacted.

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