KR102127159B1 - Plate for battery connection and manufacturing method thereof, battery connection module using the plate. - Google Patents

Abstract

The present invention relates to a battery connection plate for connecting a plurality of batteries, and does not require the operation of combining the bus bar and the plate body in a separate structure or welding, so that the volume and weight are less than before, and the battery connection is improved in durability. It is an object of the present invention to provide a battery plate, a battery connection module including the same, and a method for manufacturing the same.
Accordingly, the battery connection plate of the present invention is formed of a first metal and is formed of a plurality of bus bars and a second metal spaced apart on a plane so as to contact the terminal portion of the battery, and is located around each bus bar. It includes a plate body connected to one corner of the bus bar by the connecting portion to connect the plurality of bus bars, characterized in that a slot is formed along the circumference of the bus bar excluding the connecting portion to separate the plate body and the bus bar Should be

Description

Plate for battery connection and its manufacturing method and battery connection module including the same {Plate for battery connection and manufacturing method thereof, battery connection module using the plate.}

The present invention relates to a battery connection plate for electrically connecting a plurality of batteries in parallel or in series, and a battery connection module including a battery connection plate. More specifically, it relates to a battery connection plate and a battery connection module comprising two conductive metals.

In general, it is difficult to use only one battery cell as a power source for a home appliance or a vehicle electrical component. Therefore, the power supply device has a form in which a plurality of battery cells are connected in series and/or in parallel to obtain a desired voltage and capacity. Here, the charge/discharge control and protection circuits are mounted on the plurality of battery cells, and a form stored in a predetermined case is called a battery pack.

As described above, a conductive plate is usually used as a member for connecting a plurality of battery cells in series and/or in parallel. On the other hand, the electrode of the battery is usually made of copper, so the portion of the plate that comes into contact with the electrode of the battery is formed of copper so that galvanic corrosion does not occur due to bonding between dissimilar metals. On the other hand, aluminum or aluminum alloy is used for the portion of the plate other than the portion in contact with the battery electrode to reduce cost and weight. That is, different metals are combined to form a plate.

As an example, FIG. 1 shows that a plurality of cylindrical battery cells 20 are housed and fixed in a fixed injection material 30, and the electrodes of the battery cells 20 are connected by a plate 10. Here, the plate 10 includes a bus-bar contacting the electrode of the battery cell 20 and a plate body 11 supporting each bus bar and connected to other circuits.

The bus bar is composed of a contact portion 12 in contact with the electrode of each battery cell 20 and a wire 13 connecting each contact portion 12 in a grid, and is formed of copper. On the other hand, since the plate body 11 is formed of aluminum, the bus bars 12 and 13 and the plate body 11 are separately produced and then fixed with a separate object 14 such as a bolt. Otherwise, the operation of connecting the busbar to the open portion of the plate body with the opening formed by welding is required.

In the case of such a conventional technology, as the work required to fix the bus bar to the plate body as a separate material or to weld a plurality of bus bars to the plate body, the number of work increases greatly, and the volume and weight increase, which causes a cost increase. There was. Furthermore, there is a problem that durability may be deteriorated due to galvanic corrosion caused by a separate structure such as welding or bolts.

The present invention is to solve the problems of the prior art as described above, it does not require the operation of combining the bus bar and the plate body in a separate structure or welding, so the volume and weight are less than before, and the durability is improved for battery connection It is an object to provide a plate.

The present invention relates to a plate for connecting a battery to connect a plurality of batteries, an embodiment of the present invention to solve the above problems, in a plate for connecting a battery to connect a plurality of batteries, formed of a first metal , A plurality of bus bars are spaced apart on a plane to contact the terminal portion of the battery; And a plate body formed of a second metal, positioned around each bus bar, and connected to one corner of the bus bar by a connecting portion to connect the plurality of bus bars. Including, the slot is formed along the circumference of the bus bar except for the connecting portion, characterized in that the plate body and the bus bar are spaced apart.

In addition, the first metal of the present invention is characterized in that the copper or copper alloy, the second metal is aluminum or an aluminum alloy.

In addition, a strip-shaped neck is formed between both ends of the slot of the present invention.

In addition, the present invention relates to a battery connection module including a battery connection plate, the battery further comprises a battery fixture for receiving and fixing, the edge portion of the battery connection plate is fixed to one surface of the battery fixture It is characterized by. At this time, it is preferable that the edge portion of the battery connection plate is bent.

In addition, according to the present invention, an insertion groove is formed along an edge on one surface of the battery fixing body, and a fixing protrusion protruding in an inner direction of the insertion groove is formed in the insertion groove, and the insertion groove of the battery connection plate Characterized in that the corners are inserted and fixed.

In addition, a fixing groove having a shape corresponding to the fixing protrusion may be formed at an edge portion of the battery connecting plate of the present invention, so that the plate for battery connection can be prevented from coming off by engaging the fixing protrusion and the fixing groove.

In addition, the present invention relates to a method for manufacturing a battery connection plate, wherein the first metal is spaced apart on a plane, the second metal is arranged to contact the periphery of the first metal and connect the plurality of first metals. Metal placement step; Forming an interface part to form a single plate by forming an interface part so that surfaces contacting the first metal and the second metal are fused; And a slot processing step of forming a slot along a partial boundary of the interface portion. It includes.

Further, further comprising a plating step of plating the battery connection plate may prevent corrosion of the battery connection plate, wherein the first metal is copper or a copper alloy, and the second metal is aluminum or an aluminum alloy. It is characterized by.

In addition, the step of forming the interface portion of the present invention is characterized by applying heat and pressure at the same time, and the slotting step is characterized by being by press working.

In addition, the present invention is a battery connection plate preparation step of preparing a battery connection plate integrally formed with a bus bar and a plate body; A plate processing step of bending an edge portion of the battery connection plate; And a coupling step of fixing an edge portion of the plate to the battery fixing body so as to cover one surface of the battery fixing body for receiving and fixing the battery.

According to the problem solving means of the present invention as described above, it is possible to expect a variety of effects, including the following. However, the present invention is not established when all of the following effects are exerted.

According to the present invention, since it does not use a welding or a separate structure that connects the conventional bus bar and the plate body, there is no need for welding or fixing a separate object, so there is an effect that the man-hours are greatly reduced.

In addition, as the busbar and the plate body are integrally formed, the volume is greatly reduced, so that the battery pack can be manufactured compactly, and the galvanic corrosion caused by welding or bolts can be prevented to improve the durability of the battery pack.

In addition, the present invention can be easily fixed by inserting each corner of the battery connection plate into the battery fixture, and at the same time, the battery connection plate can also serve as a cover for the battery connection module, so that a separate cover application is unnecessary when assembling the module stage. It has the effect of reducing the process and reducing the cost.

1 is a perspective view of a conventional battery connection plate,
Figure 2 is a view of the battery connection plate and the battery connection module comprising the same for the present inventors,
Figure 3 is a perspective view of the battery connection plate of Figure 2,
Figure 4 is a schematic view of the section IV-IV' of Figure 3,
5A and 5B are enlarged views showing a state before and after the pressing process of part V of FIG. 3;
6A and 6B are enlarged views showing another embodiment of FIGS. 5A and 5B,
Figure 7 is an enlarged view of part Ⅶ of Figure 2,
8 is a flow chart of a method for manufacturing a battery connection plate,
9 is a flowchart of a method for manufacturing a battery connection module.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

Figure 2 is a perspective view of the battery connection plate and the battery connection module including the present invention, Figure 3 is a view of the battery connection plate of Figure 2, Figure 4 is a schematic view of the section IV-IV' of Figure 3, Figure 5a and Figure 5b is an enlarged view showing a state before and after the press process of the portion V of FIG. 3, FIG. 6 is an enlarged view showing another embodiment of FIG. 5b, FIG. 7 is an enlarged view of the portion 의 of FIG. 2, and FIG. 8 is a battery connection Flow chart of a method for manufacturing a plate, Figure 9 is a flow chart of a battery connection module manufacturing method.

As shown in these drawings, the present invention includes a battery connection plate 100 for connecting the electrodes of the plurality of batteries 300 and a battery fixture 200 for receiving and fixing the battery 300.

As shown in FIG. 3, the battery connection plate 100 is positioned around a plurality of bus bars 120 and bus bars 120 spaced apart on one plane, and is connected to the bus bar 120 by a connection unit. ) Is connected to one corner of the plate body 110 to connect a plurality of bus bars (120). The bus bar 120 is arranged to contact the electrodes of the batteries 300 disposed in plural.

More specifically, as shown in FIG. 4, which is a partial cross-sectional view of FIG. 3, the plate body 110 and the bus bar 120 of the battery connection plate 100 are formed on one plane, and each thickness is different. It does not matter, but is preferably formed with the same thickness.

In the present invention, the bus bar 120 is made of a first metal, and the plate body 110 is made of a second metal. Furthermore, the first metal constituting the bus bar 120 is preferably made of copper or a copper alloy, and the second metal constituting the plate body 110 is preferably made of aluminum or an aluminum alloy.

When the first metal is made of copper or a copper alloy, the battery 300 terminal is often formed of copper to increase conductivity, and the bus bar 120 is coupled to the battery 300 terminal. This is to prevent galvanic corrosion that may occur. In addition, the second metal is made of aluminum or an aluminum alloy to reduce cost and weight than using copper while having good conductivity. In addition, it is advantageous in terms of corrosion prevention that the entire plate 100 for battery connection including the plate body 110 and the bus bar 120 is plated with tin or nickel.

In other words, the plate body 110 and the bus bar 120 are composed of dissimilar metals, and as they are integrally formed, an interface portion 120a is formed on an interface between dissimilar metals. The interface portion 120a may be formed by arranging the first metal and the second metal constituting the bus bar 120 and the plate body 110, and then pressurizing them at a high temperature, as shown in FIGS. 4 and 5A. Metals are formed in a shape that digs toward each other at the interface.

As described above, the present invention is to integrally form the plate body 110 on one plane, so as to conventionally combine a plurality of bus bars 120 and the plate body 110 as separate objects or perform welding work individually. It is not required. Accordingly, the process is reduced, and productivity is greatly improved, and there is an advantageous effect of preventing galvanic corrosion.

Referring to 5b, the bus bar 120 includes a contact portion 122 contacting the battery 300 terminal and a neck portion 121 having a narrower width than the contact portion 122. The neck portion 121 may be formed in the form of a strip, and the end portion (hereinafter referred to as the neck portion) of the neck portion 121 located in the opposite direction of the contact portion 122 may include the plate body 110 and the interface portion 120a described above. It is formed and connected.

In addition, the bus bar 120 is connected to the plate body 110 only at the neck end, and the slots 123 formed through the plate are formed at the rest of the boundary between the bus bar 120 and the plate body 110. The bus bar 120 and the plate body 110 are spaced apart.

Forming the slot 123 between the bus bar 120 and the plate body 110, the contact portion 122 of the bus bar 120 is coupled to the battery 300 terminal by a method such as ultrasonic welding or bonding. When it is to increase the bonding force by pressing the bus bar 120.

5A and 5B, the neck portion 121 is formed between both ends of the slot 123, and the slot 123 is formed along the circumference of the side portion of the contact portion 122 and the neck portion 121, or , As the slot 123 is formed to surround only the contact portion 122, the neck portion 121 may be formed by the thickness of the slot 123.

The neck portion 121 may serve as a fuse. That is, by designing the width of the neck portion 121 in consideration of the specific resistance and melting temperature of the first metal constituting the bus bar 120, a current greater than the allowable current is applied to the battery connection plate 100 through the battery 300 terminal. When flowing, the neck portion 121 melts and falls, so that a fuse can be used.

5A and 5B schematically illustrate states before and after the slot 123 machining process, respectively. The slot 123 is preferably formed on the interface portion 120a shown in FIG. 5A, and may be formed by removing a portion of the interface portion 120a of the battery 300 integrated plate by a press process. That is, a slot is formed along the side edge of the neck portion 121 and the periphery of the contact portion 122 of the bus bar 120 except for the connection portion, so that the bus bar 120 and the plate body 110 may be separated.

2 to 5, the neck portion 121 is shown to be made of the same first metal as the bus bar 120, but as shown in FIGS. 6A and 6B, the neck portion 1121 is the same as the plate body 110. It may also be made of two metals. That is, the bus bar 120 has only the contact portion 122 and is formed in a circular shape, the plate body 110 is disposed to surround the circular bus bar 120 and the neck portion 1121 may be formed on the plate body 110. have. In this case, it is needless to say that the width of the neck 1121 should be designed in consideration of the specific resistance and melting temperature of the second metal constituting the plate body 110.

Further, although not shown in the drawings, the neck portion 121 may be formed including the boundary between the bus bar 120 and the plate body 110, in this case, the neck portion based on the metal having high specific resistance and low melting temperature. It is desirable to design the width of.

Unlike the conventional invention, the plurality of busbars 120 are individually coupled to the plates, respectively, the invention forms a plurality of slots 123 on the plate 100 for battery connection integrally formed through a press process. Since it can be very effective in productivity.

Referring back to FIG. 2, the plate body 110 has a bent edge and a bent portion 111 is provided, and an end portion of the edge of the plate body 110 is fixed to the battery holder 200 in which the battery is stored. That is, the battery connection plate 100 may be formed in a structure that covers and covers the plurality of batteries 300.

Referring to FIG. 7, which is an enlarged view of a portion 에서 in FIG. 2, to describe a coupling relationship between the plate body 110 and the battery fixture 200, the inserting portion 210 along an edge on one surface of the battery fixture 200 ) Is formed. Insertion portion 210 may be formed in the shape of a double wall, the edge end of the plate body 110 is inserted into the groove formed between the walls.

Further, a plurality of fixing protrusions 211 protruding toward the center of the groove are formed in the groove formed in the insertion portion 210, and the fixing groove in a shape corresponding to the fixing protrusion 211 is formed at the edge end of the plate body 110. 112 is formed. Therefore, when the corner end of the plate body 110 is inserted into the insertion portion 210 of the battery fixture 200, the fixing protrusion 211 and the fixing groove 112 are engaged so that the plate body 110 does not deviate and the battery It has a structure fixed to the congestion (200).

In the drawing, only two opposite edges of the plate body 110 are fixed to the battery fixing body 200, but the battery fixing body 200 is generally formed in a rectangular parallelepiped shape and one surface of the battery fixing body 200 When considering that the integral plate of the battery 300 is coupled to, the plate body 110 may be coupled to some or all of the four corners.

The battery connection plate 100 is connected to the battery 300 terminal as well as being fixed to the battery fixture 200 so that the connection with the battery 300 terminal can be made more stable, and the battery connection plate 100 itself As the cover of the battery fixing body 200 is possible, a separate cover is not required when assembling the module stage, so it is possible to reduce the process and reduce the cost.

Hereinafter, a method for manufacturing a battery connection plate 100 and a battery connection module including the same will be described with reference to FIGS. 8 and 9.

The battery connection plate 100 is arranged to space a plurality of first metals spaced apart on a plane, and a metal arrangement step (S1) of placing a second metal so as to connect the plurality of first metals to the periphery of the first metal. , An interface portion forming step (S2) to form an plate by forming an interface portion so that the surfaces in contact with the first metal and the second metal are fused, and a slot processing step (S3) to form a slot along a partial boundary of the interface portion And a plating step (S4) of plating the plate.

The metal arrangement step (S1) is to arrange the first metal and the second metal, the first metal is a metal to be a bus bar, and the second metal is a metal to be a plate body. When forming an integral plate of dissimilar metals prior to the metal arrangement step (S1), a pretreatment process of cleaning the first metal and the second metal may be included to improve the bonding force. As an embodiment of arranging the first metal and the second metal, the second metal is provided as a plate-shaped metal having a certain thickness formed by spacing a plurality of holes in the form of a bus bar, and in the hole, a bus bar having a smaller size than the hole The plate-shaped first metal can be disposed.

If the first metal and the second metal are disposed on one plane but the first metal is disposed between the second metal, the rights of the present invention regardless of the order and method of arranging the first metal and the second metal Range can go crazy.

The interface forming step (S2) is performed by a compression and heat treatment process that applies pressure at a constant high temperature for a predetermined time. At this time, a compression process may be performed through a rolling process. In the bonding surface of the first metal and the second metal while passing through the interface forming step (S2), each metal penetrates into the other metal, thereby physically bonding between dissimilar metals to form an integral plate.

The slot processing step (S3) is a step of processing the integral plate into a battery connection plate. Press processing is performed to form a slot connecting the contact portion of the bus bar and the edge of the neck portion connected to the contact portion.

The plating step (S4) is a process for preventing corrosion by plating with nickel or tin, and is preferably performed after all the above-described processes have been performed.

The battery connection module including the battery connection plate 100 includes a battery connection plate preparation step (S11), a plate processing step (S12) of bending the corners of the battery connection plate, and receiving and fixing the battery It is manufactured to include a coupling step (S13) for fixing the edge of the plate to the battery fixture to cover one surface of the battery fixture.

The battery connection plate preparation step (S11) is a step of preparing a conductive plate in which the first metal and the second metal are integrally formed in the shape of a bus bar and a plate body, and slots are formed at the interface between the first metal and the second metal. In this case, unlike the above-mentioned, the plating step may be performed after the plate processing step (S12).

The plate processing step (S12) is to increase the conductivity and process the battery connection plate in a form that is easy to be coupled to the fixture, and may further include a plate cutting process, a hardware pressing process, and the like. In particular, a bending process of bending the edge of the battery connection plate to be coupled to one surface of the battery fixture and processing of a fixing groove for coupling with a fixing protrusion formed in the battery fixture at the bent corner end may be included.

On the other hand, the battery fixing body may be formed of plastic injection, it is preferable that the insertion portion is formed with a fixing protrusion in the direction in which the battery is stored so that the edges of the battery connection plate can be fixed.

The combining step (S13) is a step of inserting and fixing a bent corner end of the battery connecting plate to the battery fixing body, and the fixing protrusion and the fixing groove are engaged so that the plate for battery connection is not detached and is coupled to the battery fixing body. Can.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains can be modified and modified in various ways without departing from the essential characteristics of the present invention. The protection scope of should be interpreted by the claims below, and all technical ideas within the equivalent scope thereof should be interpreted as being included in the scope of the present invention.

100: battery connection plate 110: plate body
111: bending part 112: fixing groove
120: bus bar 120a: interface
121: neck 122: contact
123: slot 200: battery fixture
210: insertion portion 211: fixed projection
300: battery
S1: metal arrangement step S2: interface formation step
S3: slotting step S4: plating step
S11: Plate preparation step for battery connection
S12: Plate processing step S13: Joining step

Claims (10)

A battery connecting plate which connects a plurality of batteries, and wherein the bus bar and the plate body are integrally formed; And
A battery holder in which the battery is stored and fixed;
Including,
The bus bar is formed of a first metal, and is spaced apart on a plane to contact the terminal portion of the battery,
The plate body is formed of a second metal, is located around each bus bar, is connected to one corner of the bus bar by a connecting portion to connect the plurality of bus bars,
A slot is formed along the circumference of the bus bar excluding the connecting portion, so that the plate body and the bus bar are separated,
A battery connection module, characterized in that the edge portion of the battery connection plate is fixed to one surface of the battery fixing body to fix both ends of the battery.
According to claim 1,
The first metal is copper, and the second metal is a battery connection module, characterized in that aluminum.
According to claim 1,
A battery connection module, characterized in that a strip-shaped neck is formed between both ends of the slot.
delete According to claim 1,
An insertion groove is formed along an edge on one surface of the battery fixture,
The insertion groove is formed with a fixed projection protruding in the inner direction of the insertion groove,
Battery connection module, characterized in that the edge of the plate body is inserted into the insertion groove is fixed.
The method of claim 5,
A battery connection module characterized in that a fixing groove having a shape corresponding to the fixing protrusion is formed at an edge of the plate body.
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