KR102543538B1 - Cylindrical Battery Connector for battery pack - Google Patents

Abstract

The present invention relates to a cylindrical battery connector for a battery pack that allows the positive electrode of a cylindrical battery to be connected to the connector through one-time welding, wherein a plurality of insertion holes are formed, the body forms a - pole and one end in the longitudinal direction has a + pole. a socket allowing cylindrical batteries to be inserted into the insertion hole and arranged in series or parallel; And a bus bar unit coupled to the socket and electrically connected to each cylindrical battery inserted into the socket through a single welding to + and - poles, wherein the bus bar unit is coupled to the socket and has an inner It consists of a busbar carrier having a space and a laminated busbar disposed in the space of the busbar carrier and electrically connecting + and - poles of the cylindrical batteries inserted into the socket at the same time.

Description

Cylindrical Battery Connector for battery pack}

The present invention relates to a cylindrical battery connector for a battery pack, and more particularly, to a cylindrical battery connector for a battery pack that allows the positive electrode of a cylindrical battery to be connected to the connector through one-time welding.

In general, secondary batteries can be reused through charging and discharging, unlike primary batteries that cannot be charged.

Secondary batteries are used as energy sources for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, uninterruptible power supplies, etc. It is also used in the form of a module in which batteries are connected and bundled into a single unit.

Small mobile devices such as mobile phones can operate for a predetermined time with the output and capacity of a single battery, but when long-term driving and high-power driving are required, such as electric vehicles and hybrid vehicles that consume a lot of power, multiple A battery module is disposed.

These secondary batteries are composed of a plurality of battery modules inside the housing, and the battery modules are connected in series or parallel through cell holders, and the output and capacity of the battery modules increase according to the number of cylindrical batteries inserted into the cell holders. do.

At this time, busbars are disposed at both ends of the cylindrical batteries to electrically connect the cylindrical batteries, and the cylindrical batteries and the busbar are electrically connected to each other through wire bonding.

However, since the above connection between the cylindrical battery and the busbar connects the + and - polarities of the cylindrical battery to the busbar through wire bonding, double welding ports in proportion to the number of cylindrical batteries must be formed on the busbar. There is a problem in that the battery module assembly time is relatively increased.

In addition, as the busbar is made of copper plate and many welding ports are formed by wire bonding, a short circuit may occur between the connecting parts, and thus safety is not guaranteed.

Korean Patent Publication No. 10-2021-0044533

The present invention was made to solve the above problems and technical prejudices, and provides a cylindrical battery connector for a battery pack in which + and - positive poles are connected to the busbar by welding only a single pole of a cylindrical battery inserted into the connector to the busbar It has its purpose.

Cylindrical battery connector for a battery pack of the present invention for achieving the above object is formed with a plurality of insertion holes, the body forms a - pole and one end in the longitudinal direction has a + pole is inserted into the insertion hole to form a series or Sockets that can be arranged in a parallel direction; And a bus bar unit coupled to the socket and electrically connected to each cylindrical battery inserted into the socket through a single welding to + and - poles, wherein the bus bar unit is coupled to the socket and has an inner It is preferable to consist of a busbar carrier having a space and a laminated busbar disposed in the space of the busbar carrier and electrically connecting + and - poles of the cylindrical batteries inserted into the socket at the same time.

At this time, in the laminated busbar, a cathode member, an insulating member, an anode member, and a pressurized insulating member of a thin film are sequentially stacked in the space portion of the busbar carrier in the direction of the socket, and the pressurized insulating member is pressurized to the negative electrode It is preferable to bring the member, the insulating member, and the anode member into close contact with the socket.

The busbar carrier protrudes along an outer wall forming a space in which the cathode member, the insulating member, the anode member, and the pressurized insulation member are stacked, and the inner surface of the outer wall, and the cathode member, the insulating member, and the anode member are A holding hold that can be mounted on the space portion, and a guide that is bent to face both sides of the end portion of the outer wall while being spaced apart from the holding hold, and the pressurized insulation member is slidably inserted to be disposed in the space portion Consisting of a slider, by pushing the pressurized insulating member inserted into the guide slider in a state coupled to the socket to pressurize the negative electrode member, the insulating member, and the positive electrode member mounted on the holder, thereby spanning the holder, It is preferable that the negative electrode member, the insulating member, the positive electrode member, and the pressurized insulating member can be closely attached to the socket.

In addition, through-holes corresponding to positions of the cylindrical battery inserted into the socket are formed in the negative electrode member, the insulating member, and the pressurized insulating member, and are formed in the positive electrode member at positions corresponding to the through-holes. It is preferable that a welding plate to be welded to the + pole of the cylindrical battery is formed through.

In addition, a plurality of position fixing hooks are formed along the outer circumference of any one of the outer circumference of the busbar carrier and the outer circumference of the socket so that the busbar carrier and the socket can be coupled, and the other one It is preferable that a position fixing groove to which the position fixing hook is coupled is formed on the outer circumference.

Finally, it is preferable that an elastic support member is disposed inside the insertion hole of the socket to elastically support the inserted cylindrical battery and electrically connect the negative pole of the cylindrical battery to the busbar unit.

According to the cylindrical battery connector for a battery pack of the present invention having the above configuration, when a plurality of cylindrical batteries are inserted into a connector equipped with a busbar unit, the - pole of the cylindrical battery is connected to the busbar unit at the same time as the insertion, and the + pole is connected to the busbar unit. By being connected to the busbar unit through silver spot welding, the busbar unit and the cylindrical battery are electrically connected with only one welding, thereby reducing the assembly time of the battery module.

In addition, as the spot welding area is reduced by half compared to the prior art, the rate of occurrence of shorts between connection areas is significantly reduced, thereby ensuring safety.

In addition, the technical effect that the busbar unit can be easily assembled to the connector is also excellent.

1 is a perspective view showing a battery module equipped with a cylindrical battery connector according to the present invention;
2 is an exploded perspective view showing a cylindrical battery connector according to the present invention;
3 is an exploded perspective view in which a bus bar unit is disassembled in the configuration of a cylindrical battery connector according to the present invention;
4 is a cross-sectional view of a main part along line II of FIG. 1;
5 is a cross-sectional view of main parts along line II-II of FIG. 1;
6 and 7 are reference views showing a process in which the negative electrode member, the insulating member, and the positive electrode member of the busbar unit are brought into close contact with the connector by the pressurized insulating member.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. These embodiments are provided to explain the present invention in more detail to those skilled in the art to which the present invention pertains. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer explanation.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. Terms are only used to distinguish one component from another.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

1 is a perspective view showing a battery module having a cylindrical battery connector according to the present invention, FIG. 2 is an exploded perspective view showing a cylindrical battery connector according to the present invention, and FIG. 3 is a booth during construction of a cylindrical battery connector according to the present invention. Fig. 4 is an exploded perspective view of the bar unit, Fig. 4 is a cross-sectional view along the line II-I in Fig. 1, Fig. 5 is a cross-sectional view along the line II-II in Fig. 1, Figs. , It is a reference diagram showing the process in which the anode member adheres to the connector by the pressurized insulation member.

As shown in FIGS. 1 to 7, the cylindrical battery connector 300 of the present invention has a plurality of insertion holes 110 formed, a cylindrical battery 20 in which a body forms a - pole and one end in the longitudinal direction has a + pole. ) is inserted into the insertion hole 110 so that it can be arranged in series or parallel direction (100); And a bus bar unit 200 coupled to the socket 100 and electrically connecting + and - poles to each cylindrical battery 20 inserted into the socket 100 through a single welding, The busbar unit 200 is coupled to the socket 100 and is disposed in a busbar carrier 210 having a space 213 to the inside and a space 213 of the busbar carrier 210, It consists of a laminated busbar 220 electrically connecting + and - poles of the cylindrical batteries 20 inserted into the socket 100 at the same time.

Prior to description, the biggest feature of the cylindrical battery connector 300 of the present invention is that the cylindrical battery 20 inserted into the cylindrical battery connector 300 and the booster unit can be electrically connected to each other through one-time welding. .

1 shows a battery module having cylindrical battery connectors 300 connected in series or in parallel to manufacture a battery pack.

On the lower side of the drawing, a cylindrical battery connector 300 is provided so that a plurality of cylindrical batteries 20 are inserted and welded to output and charge electricity, and a cylindrical battery inserted into the upper side of the cylindrical battery connector 300 ( A battery holder 30 for preventing the movement and separation of the cylindrical battery 20 by holding and supporting the upper portion of the cells 20 is disposed.

At this time, of course, the battery holder 30 is made of a normal insulator.

Hereinafter, the cylindrical battery connector 300 will be described in detail.

The cylindrical battery connector 300 includes a socket 100 and a bus bar unit 200 as shown in FIGS. 1 to 5 .

The sockets 100 are arranged in series or parallel directions for manufacturing battery packs, and maintain a predetermined width and length.

A plurality of insertion holes 110 are formed on the upper surface of the socket 100 into which the cylindrical battery 20, in which the body forms a negative pole and one end in the longitudinal direction has a positive pole, is inserted, and is formed in the direction of the socket 100. Cylindrical cells 20 inserted along the way can be arranged in series or parallel directions.

At this time, the inside of the insertion hole 110 of the socket 100 elastically supports the cylindrical battery 20 inserted from the outside, and at the same time, the - pole of the body of the cylindrical battery 20 is the negative pole of the bus bar unit 200 to be described later. An elastic support member 111 electrically connected to the member 221 is disposed.

The elastic support member 111 is made of gold or copper material having excellent electrical conductivity and is electrically connected to the cathode member 221 to be described later, as well as toward the center of the insertion hole 110 from the inside of the insertion hole 110. As shown in FIGS. 4 and 5, the outer surface of the inserted cylindrical battery 20 is elastically pressed while maintaining an arch shape.

Therefore, the cylindrical battery 20 inserted into the insertion hole 110 of the socket 100 is primarily connected to the busbar unit 200 to be described later at the same time as the insertion, and then the + pole through a single welding. Connected.

In this embodiment, it is shown that four insertion holes 110 are formed in the socket 100 having a length in one direction, but the shape of the socket 100 and the number of insertion holes 110 are not limited and may be formed in various ways. can

The bus bar unit 200 is electrically connected to the plurality of cylindrical batteries 20 inserted into the socket 100, and the +, - The poles are coupled to the lower surface of the socket 100 so that they can be electrically connected.

That is, the busbar unit 200 does not weld the + and - poles of the cylindrical battery 20 twice through wire bonding, respectively, as in the prior art, but only a single welding to the positive poles (+, -) of the cylindrical battery 20. ) is to be electrically connected to the busbar unit 200.

As shown in FIGS. 2 to 5, the above busbar unit 200 is coupled to the lower surface of the socket 100 in the drawing in a shape corresponding to the socket 100 and has a space 213 inside the busbar carrier ( 210) and the laminated busbar 220, which is disposed in the space 213 of the busbar carrier 210 and electrically connects the + and - poles of the cylindrical batteries 20 inserted into the socket 100 at the same time. It consists of

Laminate busbar 220 is composed of a thin film negative electrode member 221, an insulating member 223, an anode member 225, and a pressurized insulating member 227, and the space portion 213 of the busbar carrier 210 to be described later. ) are sequentially stacked toward the socket 100 as shown in FIGS. 3 to 5.

Here, the pressurized insulating member 227 forms a stacked state together with the cathode member 221, the insulation member 223, and the anode member 225, but the cathode member 221 through pressing by pushing applied from the outside , The insulation member 223 and the anode member 225 are pushed in the direction of the socket 100 to bring them into close contact with the socket 100 (see FIGS. 6 and 7).

In addition, it is preferable to use gold or copper for the cathode member 221 and the anode member 225, respectively, having excellent flow of + and - pole current, and the insulating member 223 and the pressurized insulation member 227 are the cathode member. 221 and the anode member 225 are disposed between each to achieve insulation, and a normal insulating material is used.

Of course, the pressure insulating member 227 maintains a predetermined thickness or is made hard because it presses the negative electrode member 221, the insulating member 223, and the positive electrode member 225.

Meanwhile, as shown in FIG. 3, the negative electrode member 221, the insulating member 223, and the pressurized insulating member 227 have penetrations corresponding to the lower end of the cylindrical battery 20 inserted into the insertion hole 110 of the socket 100. Holes (H) are formed, and are formed in the anode member 225 at positions corresponding to the through-holes (H), and through the through-holes (H), as shown in FIGS. 4 and 5, the cylindrical battery 20 is formed. + A welding plate 225a welded to the pole is formed.

Through the arrangement as above, the through hole H of the negative electrode member 221, the insulating member 223, and the pressurized insulating member 227 and the welding plate 225a of the positive electrode member 225 are disposed on the same axis line. , Along with securing a space for a welder (not shown) to enter, the welding plate 225a penetrates the through hole H of the negative electrode member 221 and the insulating member 223 to form a positive pole and spot welding can be performed.

At this time, a portion of the welding plate 225a formed on the anode member 225 is connected to the anode member 225 so that bending may occur, and a portion other than this is cut from the anode member 225.

In addition, nickel is plated on the anode member 225 so that spot welding with the cylindrical battery 20 can be stably performed.

The busbar carrier 210 includes an outer wall 211, a mounting hold 215, and a guide slider 217.

The outer wall 211 maintains a rectangular shape corresponding to the shape of the cylindrical battery connector 300 as a whole, as shown in FIG. A predetermined height is maintained to form a space portion 213 in which the member 225 and the pressurized insulating member 227 can be stacked.

At this time, the upper portion of the outer wall 211 having a rectangular shape has the elasticity of the socket 100 when the laminated busbar 220 stacked in the space 213 in a state where the busbar carrier 210 is coupled to the socket 100 It is in an open state to maintain contact with the support member 111, and the lower portion of the outer wall 211 is open in a state connected by a plurality of reinforcing ribs 212.

A mounting hold 215 is formed on the inner surface of the outer wall 211 .

3 to 5, the holding hold 215 is formed to protrude toward the space 213 along the inner surface of the outer wall 211, and includes the cathode member 221, the insulating member 223, and the anode member 225. ) to be mounted on the space portion 213.

At this time, the holding hold 215 may have a curved shape or an inclined surface so that the pressed insulating member 227 that is being pushed can be easily crossed over or crossed over.

And, the guide slider 217 is formed on the lower side of the outer wall 211 in the drawing.

The guide slider 217 is bent to face each other on both sides of the lower end of the outer wall 211 in a state of being spaced apart from the holding hold 215 in the lower direction by a predetermined distance in the drawing, so that the pressurized insulation member 227 can be slid and inserted into the space. By forming, the pressurized insulating member 227 can be disposed in the lower portion of the mounting hold 215 in the drawing in the space portion 213.

That is, the busbar carrier 210 is mounted on the space portion 213 in a state in which the cathode member 221, the insulation member 223, and the anode member 225 are stacked on the upper side in the drawing based on the holder 215 spot welding between the cylindrical battery 20 and the anode member 225 in the state of being coupled to the socket 100 To achieve this, by pushing the pressurized insulation member 227 inserted into the guide slider 217 upward in the drawing using a worker or a separate pressurizing means, the cathode member 221 mounted on the holder 215, insulation The negative electrode member 221, the insulating member 223, the positive electrode member 225, and the pressurized insulating member 227 are sequentially stacked by pressing the member 223 and the positive electrode member 225 so as to span the holding hold 215. in a state of being in close contact with the lower surface of the socket 100.

In this case, the negative electrode member 221 is connected to the elastic support member 111 with a -pole, and the negative electrode member 221, the insulating member 223 and the positive electrode member 225 are in close contact with each other without separation. By forming, Spot welding of the anode member 225 and the welding plate 225a is performed in a stable state.

On the other hand, a plurality of position fixing hooks along the outer wall 211 are located at the upper end of the drawing of the outer wall 211, the outer circumference of the busbar carrier 210, so that the busbar carrier 210 and the socket 100 can be coupled to each other. 219 is formed, and a position fixing groove 113 to which the position fixing hook 219 is coupled may be formed on the outer circumference of the socket 100 at a position corresponding to the position fixing hook 219.

In this embodiment, although the position fixing hook 219 is formed on the outer wall 211 and the position fixing groove 113 is formed in the socket 100, the position fixing hook 219 and the position fixing groove 113 Since the positions of are mutually changeable, the positions are not limited, and the busbar carrier 210 and the socket 100 may be coupled through various coupling means.

Hereinafter, a process in which the cylindrical battery 20 inserted into the cylindrical battery connector 300 according to the present invention is welded to the negative electrode member 221 will be described with reference to the accompanying drawings.

First, the bus bar carrier 210 in which the negative electrode member 221, the insulating member 223, the positive electrode member 225, and the pressurized insulating member 227 are disposed under the socket 100 is placed with a position fixing hook and a position fixing groove. Combined via (113).

At this time, the negative electrode member 221, the insulating member 223, and the positive electrode member 225 are in a state of being supported across the mounting hold 215 as shown in FIG. It is inserted and placed.

In the above state, the pressing insulating member 227 is pushed upward in the drawing in the direction of the arrow in FIG. 6 using a worker or a pressing means.

At this time, the pressurized insulating member 227 pressurizes the negative electrode member 221, the insulating member 223, and the positive electrode member 225 while exceeding the holding hold 215 by the pushing force, and in this process, the negative electrode member ( 221), the insulating member 223, and the anode member 225 are sequentially maintained in close contact with the socket 100.

In addition, the pressurized insulating member 227 is stretched across the holder 215 as shown in FIG. 7 in a state in which the negative electrode member 221, the insulating member 223, and the positive electrode member 225 are pressed, so that the negative electrode member 221 , The pressurized state of the insulating member 223 and the anode member 225 is continuously maintained, and at the same time, the anode member 221, the insulating member 223, and the anode member 225 are fundamentally blocked from being pressurized. do.

Then, when the cylindrical battery 20 is inserted into the insertion hole 110 of the socket 100, the cylindrical battery 20 is supported by the elastic support member 111 and the negative electrode member 221 of the laminate bus bar 220 and - poles are connected, and the + pole at the bottom is not connected to the cathode member 221.

In the above state, while the welding machine enters in the direction of the arrow in FIG. 7 through the through hole H, the welding plate 225a of the anode member 225 is brought into close contact with the + polarity of the cylindrical battery to perform spot welding, thereby performing a cylindrical battery ( The + and - poles of 20) are electrically connected to the laminated bus bar 220.

Such spot welding is continuously performed according to the number of cylindrical batteries 20 inserted into the cylindrical battery connector 300 .

As described so far, in the cylindrical battery connector of the present invention, when a plurality of cylindrical batteries are inserted into a connector equipped with a busbar unit, the - pole of the cylindrical battery is connected to the busbar unit at the same time as the insertion, and the + pole is a spot By being connected to the busbar unit through welding, the busbar unit and the cylindrical battery are electrically connected with only one welding, thereby reducing the assembly time of the battery module.

In addition, as the spot welding area is reduced by half compared to the prior art, the rate of occurrence of shorts between connection areas is significantly reduced, thereby ensuring safety.

In addition, the technical effect that the busbar unit can be easily assembled to the connector is also excellent.

In the above, the cylindrical battery connector of the present invention has been described with preferred embodiments and accompanying drawings, but this is only intended to help understanding of the invention and is not intended to limit the technical scope of the invention thereto.

That is, various modifications or modifications are possible to those skilled in the art without departing from the technical gist of the present invention, and such changes or modifications are within the technical scope of the present invention in view of the interpretation of the claims. Needless to say, being within

10: battery module 20: cylindrical battery
30: battery holder 100: socket
110: insertion hole 111: elastic support member
113: position fixing home 200: bus bar unit
210: bus bar carrier 211: outer wall
212: reinforcing rib 213: space
215: mounting holder 217: guide slider
219: position fixing hook 220: laminate bus bar
221: negative electrode member 223: insulating member
225: anode member 225a: welding plate
227: pressurized insulation member 300: cylindrical battery connector
H: through hole

Claims (6)

A plurality of insertion holes 110 are formed, and the cylindrical battery 20 having a body forming a - pole and one end in the longitudinal direction having a + pole is inserted into the insertion hole 110 so that it can be arranged in series or parallel direction. socket 100 to; and
A busbar unit 200 coupled to the socket 100 and electrically connecting + and - poles to each cylindrical battery 20 inserted into the socket 100 through a single welding,
The busbar unit 200,
A busbar carrier 210 coupled to the socket 100 and having a space 213 inside, and the busbar carrier 210 disposed in the space 213 of the busbar carrier 210 and inserted into the socket 100. It consists of a laminated bus bar 220 electrically connecting the + and - poles of the cylindrical batteries 20 at the same time,
In the laminated busbar 220, the cathode member 221, the insulating member 223, the anode member 225, and the pressurized insulating member 227 of the thin film form the busbar carrier 210 in the direction of the socket 100. are sequentially stacked in the space portion 213 of the, and the pressurized insulating member 227 adheres the negative electrode member 221, the insulating member 223, and the positive electrode member 225 to the socket 100 through pressurization. Cylindrical battery connector for battery pack characterized by
delete According to claim 1,
The busbar carrier 210,
An outer wall 211 forming a space 213 in which the cathode member 221, the insulating member 223, the anode member 225, and the pressurized insulating member 227 are stacked,
A holding hold 215 protruding along the inner surface of the outer wall 211 and allowing the cathode member 221, the insulating member 223, and the anode member 225 to be mounted on the space portion 213, and ,
A guide slider that is bent to face both sides of the distal end of the outer wall 211 while being spaced apart from the holding hold 215 and allows the pressurized insulating member 227 to be slidably inserted into the space 213 ( 217), consisting of,
In the state of being coupled to the socket 100, the cathode member 221, the insulating member 223, As the anode member 225 is held over the mounting hold 215 while being pressurized, the anode member 221, the insulating member 223, the anode member 225, and the pressing insulating member 227 are attached to the socket 100. Cylindrical battery connector for a battery pack, characterized in that so that it can be in close contact.
According to claim 1,
Through-holes H corresponding to the position of the cylindrical battery 20 inserted into the socket 100 are formed in the negative electrode member 221, the insulating member 223, and the pressurized insulating member 227,
The anode member 225 is formed at a position corresponding to the through holes (H), and welded to the + pole of the cylindrical battery 20 through the through hole (H), characterized in that the welding plate (225a) is formed Cylindrical cell connector for battery packs that
According to claim 1,
So that the busbar carrier 210 and the socket 100 can be coupled,
A plurality of position fixing hooks 219 are formed along the outer circumference of one of the outer circumference of the busbar carrier 210 and the outer circumference of the socket 100, and the position fixing hook 219 is formed along the outer circumference of the other one. A cylindrical battery connector for a battery pack, characterized in that a position fixing groove 113 to which the hook 219 is coupled is formed.
According to claim 1,
In the insertion hole 110 of the socket 100, the inserted cylindrical battery 20 is elastically supported and the - pole of the cylindrical battery 20 is electrically connected to the busbar unit 200. A cylindrical battery connector for a battery pack, characterized in that the elastic support member (111) is disposed.

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