TWI395363B - Battery connecting tabs - Google Patents

Description

Battery connection guide

The invention relates to a battery connecting guide, in particular to a battery connecting guide made of two different materials.

The battery is generally used on a portable mobile device. In order to make the battery of a general capacity supply the power required for a large mobile device, such as an electric vehicle, it is bound to connect a plurality of batteries in series or in parallel to form a large battery. A battery module for charging and discharging current. One of the methods of serially connecting or connecting the batteries is to use a connecting guide to bridge between the electrodes of the adjacent two batteries, and connect the connecting guides to form a current loop with the batteries by soldering.

Referring to the eighth figure, it is a perspective view and a schematic view of a conventional battery connection guide. Generally, the material of the battery 200 housing (including the electrode portion) is usually pure nickel, iron-plated nickel or aluminum, and is mainly used to prevent the active material inside the battery 200 from directly contacting the outside; if directly using the same material as the battery 200 housing The battery connection guide 100 has the advantage that the electrode 210 and the connection guide 100 are easily soldered. However, since the above materials are inferior in conductivity, they are not suitable for use in a battery module in which a large current is charged and discharged.

The battery connection guide 100, which is generally used in a large current charging and discharging battery module, is made of copper because the conductivity of the copper material itself is good; since a large current is required to be supplied when the battery module is charged and discharged, it is necessary to increase the copper connection. The thickness of the sheet is to enhance its conductive characteristics, and the increase in thickness correspondingly increases the difficulty of soldering between the battery 200 and the connecting guide 100. The main reason is that when the thickness of the connecting guide 100 is increased, the current required for soldering needs to be relatively large, and the soldering portion is The greater the stress, the more difficult the control of the process parameters is, and the welding temperature required for welding is also difficult to concentrate due to the large heat dissipation area, which makes the welding quality difficult to control.

In addition, since copper itself also has good thermal conductivity, copper can quickly remove the heat of its surface during the soldering process, so that the heat is not easily concentrated during the soldering process, and the difficulty of soldering is improved.

Therefore, how to provide a battery module having a good electrical conductivity, thermal conductivity, and a battery connection guide 100 that is easily connected to the battery 200 for charging and discharging at a large current is an object that the industry is currently trying to overcome and improve.

In view of the prior art, it is an object of the present invention to provide a battery connection guide for connecting a plurality of batteries in series or in parallel to form a current loop, and the battery connection guide itself has good It has the advantages of conductivity, thermal conductivity and easy connection to the battery.

The battery connection guide is configured to electrically connect a plurality of batteries, and the battery connection guide comprises a first body and a second body. The second sheet system is attached to the first sheet body, forming a physical and electrical connection with the first sheet body, and the second sheet body is formed with a plurality of perforations; wherein the second sheet body is electrically conductive The first sheet is larger than the first sheet, and the second sheet is physically and electrically connected to the electrodes of the batteries.

The invention utilizes two metal materials with different thicknesses and characteristics to join each other to form a battery connecting guide piece, which can effectively reduce the welding difficulty between the battery and the connecting guide piece, and can also pass the large current when the battery is charged and discharged. The heat of the battery is quickly dissipated during charging and discharging.

<Prior technology>

50‧‧‧Battery

52‧‧‧Electrode

60‧‧‧Connecting guide

<present invention>

10‧‧‧Battery connection guide

110‧‧‧ first body

112‧‧‧ convex

120‧‧‧Second body

122‧‧‧Perforation

124‧‧‧Bends

20‧‧‧Battery

22‧‧‧Electrode

The first figure is an exploded perspective view of a battery connecting guide of the first embodiment of the present invention.

The second figure is an exploded perspective view of the battery connecting guide of the second embodiment of the present invention.

Figure 3 is a cross-sectional view showing a battery connecting guide of a second embodiment of the present invention.

The fourth figure is a schematic diagram of the connection of the battery connecting guide and the battery according to the second embodiment of the present invention.

Figure 5 is a cross-sectional view showing the connection of a battery connecting guide and a battery in accordance with a second embodiment of the present invention.

Figure 6 is a schematic view showing the use of the battery connecting guide of the third embodiment of the present invention.

Figure 7 is a perspective view of a battery connecting guide of a fourth embodiment of the present invention.

The eighth figure is a perspective view of a conventional battery connection guide.

Referring to the first figure, it is an exploded perspective view of the battery connecting guide of the first embodiment of the present invention. The battery connecting guide 10 is used for electrically connecting a plurality of batteries to form a current loop for charging and discharging the battery. The battery connecting guide 10 includes a first body 110 and a second body 120, and the first body 110 and the second body 120 are made of a metal material.

A plurality of through holes 122 are formed on the second body 120 to enhance the heat dissipation effect of the second body 120 by thermal convection; the first body 110 is attached to one of the second bodies 120. The surface and the perforations 122 are closed, and the second body 120 is physically and electrically connected to the first body 110.

The first body 110 is mainly used to electrically connect to the batteries 20 to provide a current loop when the batteries 20 are charged and discharged. The second body 120 is mainly used for the passage of a large current when the batteries 20 are charged and discharged, and provides a path for the batteries 20 to conduct heat.

Referring to the second and third figures, respectively, an exploded perspective view and a side view of a battery connecting guide according to a second embodiment of the present invention. The battery connecting guide 10 includes a first body 110 and a second body 120, and the first body 110 and the second body 120 are made of a metal material, and the first A plurality of convex portions 112 are formed on the wafer 110.

The first body 110 is attached to one surface of the second body 120 and formed into a physical connection and an electrical connection. The second body 120 is formed with a plurality of perforations 122, and the perforations 122 are The convex portions 112 are disposed corresponding to the convex portions 112, and the convex portions 112 are protruded in a direction opposite to the through holes 122. In addition, the second body 120 further includes a bent portion 124, and the bent portion 124 can be electrically connected to one of the external circuit boards.

Referring to the fourth and fifth figures, respectively, a schematic view and a cross-sectional view of the battery connecting guide of the present invention are used. The first sheet 110 is made of a ferromagnet sheet such as iron (Fe), cobalt (Co), nickel (Ni) or an alloy thereof. In the embodiment, the first sheet 110 is pure. nickel. The convex portion 112 of the first body 110 is mainly used to form a physical and electrical connection with the electrodes 22 of the batteries 20 to provide a current loop for charging and discharging the batteries. The first body 110 and the battery 20 can be used as a connection method of resistance welding, spot welding, soldering or ultrasonic welding. In this embodiment, the first piece 110 and the battery are mainly completed by spot welding. 20 physical connections. In order to facilitate the soldering of the batteries 20 and the first sheet 110, the thickness of the first sheet 110 is not excessively thick, and the thickness of the first sheet 110 is preferably 0.1 to 0.3 mm.

The second sheet 120 is made of a copper-based sheet having excellent conductivity and thermal conductivity, such as copper (Cu), silver (Ag), and gold (Au). In this embodiment, the second sheet is used. Body 120 is red copper. The second body 120 is mainly used for the passage of a large current when the batteries 20 are charged and discharged, and provides a path for the batteries 20 to conduct heat. In order to achieve good electrical and thermal conductivity, the thickness of the second body 120 must be thicker than that of the first body 110, that is, the thickness of the second body 120 must be greater than 0.3 mm. The presence of the perforations 122 serves as a passage for the airflow to pass through, and the heat dissipation effect of the second sheet 120 is further enhanced by the thermal convection. In addition, the through holes 122 can also be used as a window for spot welding between the convex portions 112 of the first sheet body 110 and the battery 20, and the soldering tool passes through the through holes 122 to contact the convex portions 112 to The protrusions 112 are soldered to the electrodes of the battery 20.

The first piece 110 and the second piece 120 of different thicknesses are attached to each other, and the first piece 110 having a relatively small thickness is used to form a physical connection and an electrical connection with the batteries 20, so that The battery 20 and the battery connecting guide 10 are easily soldered, and the second body 120 is attached to the first body 110 and has a thick thickness, so that the conductivity of the whole battery connecting guide 10 is improved and transmitted through the The through hole 122 is disposed on the second body 120 to further improve the heat dissipation effect of the battery connecting guide 10 as a whole.

Referring to the sixth figure, a schematic diagram of the use of the battery connecting guide of the third embodiment of the present invention is shown. The second body 120 is formed with a plurality of parallel perforations 122. The perforations 122 are correspondingly provided with two first bodies 110 including a plurality of convex portions 112. The convex portions 112 are physically connected and electrically connected. The plurality of batteries 20 are provided to provide a larger voltage or a larger capacity.

Referring to the seventh figure, a perspective view of a battery connecting guide according to a fourth embodiment of the present invention is shown. The battery connecting guide 10 includes two first bodies 110 and a second body 120. The two first bodies 110 are physically connected and electrically connected to a plurality of batteries, and the second body 120 is formed on the second body 120. There are a plurality of perforations 122, and the two first sheets 110 are attached to one surface of the second sheet 120, and the second sheets 120 respectively shield portions of the perforations 122.

In this embodiment, the first body 110 is divided into two and physically connected to the batteries. Compared with the single piece first piece 110 of the above embodiment, the embodiment is The overall impedance of the first body 110 is increased. Since the current itself is selected to pass through the path of the low impedance, in this embodiment, the current of the battery charge and discharge flows through the first body 110 to the second body 120 having a lower impedance. Further, it is transmitted to the outside via the bent portion 124 of the second sheet 120.

In addition, the battery connecting guide 10 can further use a second piece 120 with a plurality of juxtaposed first pieces 110, or use the battery connecting guide of the first embodiment of the present invention to match the battery connection of the second embodiment. The guides are formed to form a large battery pack.

In summary, the present invention utilizes two sheets of different thicknesses and characteristics to be joined to each other to form a battery connecting guide, wherein the thinner sheet has a structure similar to that of the battery casing, and is used as a welding material between the battery and the battery. It can effectively reduce the welding difficulty between the battery and the connecting guide. The thicker sheet has a lower impedance and thus has good electrical conductivity and thermal conductivity, and can pass a large current when the battery is charged and discharged, and can help the heat of the battery to be quickly dissipated during charging and discharging.

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect.

10‧‧‧Electric holding guide

110‧‧‧ first body

112‧‧‧ convex

120‧‧‧Second body

122‧‧‧Perforation

124‧‧‧Bends

Claims (10)

A battery connecting guide for electrically connecting electrodes of a plurality of batteries, the battery connecting guide comprises: a first piece; a second piece attached to the first piece to make the second The first body and the second body are formed of a metal, and the second piece is formed by a plurality of holes. The conductivity of the body is greater than the first body, the thickness of the second body is greater than the first body, and the electrodes of the batteries are attached to the first body, so that the battery and the first body are formed. Physical connection and electrical connection. The battery connecting guide according to claim 1, wherein the first body is formed with a plurality of convex portions corresponding to the perforations and connected to the battery electrodes. The battery connecting guide according to claim 2, wherein the convex portions are protruded in a direction opposite to the through holes. The battery connecting guide according to claim 1, wherein the first body further comprises a bent portion for electrically connecting a circuit board. The battery connecting guide according to claim 1, wherein the first body is a ferromagnetic metal. The battery connection guide of claim 3, wherein the first body is nickel. The battery connecting guide according to claim 1, wherein the second body is a copper group metal. The battery connecting guide according to claim 5, wherein the second body is red copper. The battery connecting guide according to claim 1, wherein the first body has a thickness of 0.1 to 0.3 mm. The battery connecting guide piece according to claim 1 further includes two first sheets disposed on the second sheet and shielding the portions of the perforations.