KR102096446B1 - Assembly of Electric Energy Storage Device having a Connector Structure And Assembling Method thereof - Google Patents

Abstract

The present invention relates to an electrical energy storage device assembly including a connection structure and a method for manufacturing the same, and to assist in making it easier to connect devices between electrical energy storage devices or electrical energy storage devices. The present invention is an electrical energy storage device having a fastening groove formed in the center of the cover, a terminal inserted into the fastening groove and provided to be weldable, fastened with the terminal and spaced apart from the cover of the electrical energy storage device at a predetermined interval. Disclosed is an electrical energy storage assembly comprising a connection structure, characterized in that it comprises an auxiliary terminal supporting connection with a separate device, and a method for manufacturing the same.

Description

An assembly of an electric energy storage device including a connection structure and a manufacturing method thereof {Assembly of Electric Energy Storage Device having a Connector Structure And Assembling Method thereof}

The present invention relates to an electrical energy storage device, and in particular to an electrical energy storage device assembly and a method of manufacturing the same, including a connection structure provided to make it easier to connect a device connection of an electrical energy storage device or a connection between electrical energy storage devices. It is about.

Recently, there are increasing cases of converting and using energy such as hydro, wind, and solar power, which are in the spotlight as eco-friendly energy, into electrical energy. This eco-friendly energy has the advantage of not generating pollutants unlike oil or coal. However, since eco-friendly energy such as water power, wind power, and solar power is relatively affected by the surrounding environment, there is a limitation in generating electricity at a time when electric energy is required, and accordingly, an energy storage device capable of storing normally produced power for constant power supply. Is necessary. Accordingly, a lot of attention has recently been focused on energy storage devices.

However, electric energy storage devices, such as secondary batteries and electric double layer capacitors, have almost similar structural characteristics and the unit cell voltage is only 1.2 to 3.6V. Therefore, in order to use such an electric energy storage device in an application field requiring an operating voltage of a few volts to a few hundred volts, it may be connected in parallel in some cases to increase the electric energy storage capacity.

In general, soldering, welding, screws, etc. are used to connect electrical energy storage devices.

Soldering is a method mainly used for small electrical energy storage devices, and a circuit board is used as a conductor connecting electrical energy storage devices.

Welding is also frequently used to connect electrical energy storage devices. In particular, resistance welding is often used for direct and parallel connection of small and medium-sized electric energy storage devices. However, it is difficult to use resistance welding for direct parallel connection of large electrical energy storage devices. In particular, there are difficulties in welding of materials such as aluminum. In recent years, as laser welding technology has been developed and popularized, laser welding has been widely used for direct and parallel connection of electric energy storage devices including large-sized lasers.

NASA is a method that is traditionally used for serial and parallel use of electrical energy storage devices. It is a familiar way to connect electrical energy storage devices, such as secondary batteries or electrical double-layer capacitors, in series or in parallel using bus bars and screws. However, in the case of aluminum, which is frequently used as the case material for electrical energy storage devices, the probability of thread failure including thread wear is high due to the weak tensile strength, and corrosion prevention treatment is also required to prevent corrosion of the connection after connection work.

In addition, according to various demands of consumers, as the electric energy storage device having the welding connection type terminal and the electrical energy storage device having the screw connection type terminal are respectively produced, the burden of the production model increases.

Accordingly, an object of the present invention is to provide an electrical energy storage device assembly and a method of manufacturing the same, including a connection structure that facilitates connection between devices of electrical energy storage devices or electrical energy storage devices.

The present invention for achieving the object as described above is an electrical energy storage device having a fastening groove formed in the center of the cover, a terminal inserted and fixed to the fastening groove, and provided to be weldable, fastened with the terminal, and Disclosed is a configuration of an electrical energy storage device including a connection structure, characterized in that it comprises a secondary terminal supporting the connection with a separate device at a position spaced apart from the cover.

The terminal includes a terminal body having a through-hole formed in the center and a ring shape of a cylinder forming the through-hole, and the diameter of the terminal body is provided equal or similar to the diameter of the fastening groove.

In addition, when the terminal is formed to have a height greater than the depth of the fastening groove and is inserted and fixed in the fastening groove, the terminal may be disposed to protrude from the upper surface of the fastening groove.

The auxiliary terminal is inserted into the upper end of the protruding terminal and is connected to a first connection portion, the first connection portion having a fastening hole fastened to the terminal through at least one of laser welding and screw coupling, and is perpendicular to the first connection portion. Or it may include a second connecting portion extending at a certain angle, the third connecting portion extending perpendicular to the second connecting portion or extending at a certain angle to face the first connecting portion.

In addition, the auxiliary terminal is inserted into the upper end of the protruding terminal, the first connection portion having a fastening hole fastened to the terminal through at least one of laser welding and screw coupling, connected to the first connection portion and connected to the first connection portion It may include a second connection portion extending vertically or at a predetermined angle, and a fourth connection portion extending perpendicularly or having a certain angle to the second connection portion and being symmetrical to the first connection portion based on the second connection portion. .

In the above-described configuration, the second connection portion may include a connection hole provided at the center to enable screwing, and at least one of the third connection portion and the fourth connection portion may include a connection hole provided to penetrate the front and rear surfaces. It can contain.

On the other hand, the auxiliary terminal is inserted into the upper end of the protruding terminal and connected to the first connection portion, the first connection portion having a fastening hole fastened to the terminal through at least one of laser welding and screw coupling, and the first connection portion It may include a second connection portion having a connection hole that is vertically or at a predetermined angle and extends and penetrates the front and rear surfaces in the center.

In addition, the electrical energy storage device may further include a bus bar connected to at least one of a connection hole formed in the auxiliary terminal and a screw connection or a welding connection.

In addition, the present invention, the step of providing an electrical energy storage device having a fastening groove formed in the center of the cover, a step of fixing and disposing a terminal formed of a material weldable to the fastening groove, fixed step, at a position spaced apart from the cover Disclosed is a configuration of a method for manufacturing an electric energy storage device having a connection structure, characterized in that it comprises a connection step of connecting an auxiliary terminal supporting connection with another device to the terminal.

The fixing step includes laser welding the terminal so that a portion of the upper end protrudes from the fastening groove.

The connecting step includes aligning the fastening hole provided at one end to the protruding upper end of the terminal, and fixing the fastening hole and the upper end of the terminal by laser welding.

The method comprises aligning one side of the busbar to the connection hole formed in the auxiliary terminal, screwing the busbar to the connection hole of the auxiliary terminal, and aligning one side of the busbar to the connection hole formed in the auxiliary terminal and aligning the busbar The bar may further include at least one of the steps of laser welding and coupling one end of the auxiliary terminal with a connection hole.

1 is a block diagram schematically showing an external appearance of an electrical energy storage device assembly to which a connection structure according to an embodiment of the present invention is fastened.
2 is a view for explaining the configuration of the electrode element of FIG. 1;
3 is a view showing a form in which the electrical energy storage device and the connection structure of the present invention are separated.
4 is a view for explaining other examples of the auxiliary terminal according to an embodiment of the present invention.
5 is a view for explaining a method of manufacturing an electrical energy storage device assembly including a connection structure according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the embodiment of the present invention are described, and descriptions of other parts will be omitted so as not to distract the subject matter of the present invention.

The terms or words used in the present specification and claims described below should not be construed as being limited to ordinary or dictionary meanings, and the inventor is appropriate as a concept of terms to describe his or her invention in the best way. It should be interpreted as a meaning and a concept consistent with the technical idea of the present invention based on the principle that it can be defined as such. Therefore, the embodiments shown in the embodiments and the drawings described in this specification are only the most preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, and various equivalents that can replace them at the time of this application It should be understood that there may be water and variations.

Hereinafter, the components related to the functions of the present invention and the roles of components will be described in more detail. Here, the features of the present invention are not limited to the above-described examples. That is, the present invention should be understood that the features include not only the above-described examples, but also a form change of each component described below or additional functions.

1 is a view schematically showing the appearance of an electrical energy storage device assembly having a connection structure according to an embodiment of the present invention, and FIG. 2 is a view showing in more detail an electrode element included in the electrical energy storage device of the present invention. And Figure 3 is a view showing a form in which the connection structure of the present invention is separated from the electrical energy storage device.

First, referring to FIGS. 1 to 3, the electrical energy storage device assembly 1 having the connection structure of the present invention includes the electrical energy storage device 10 and the connection structure 400.

The electric energy storage device assembly 1 having the connection structure of the present invention including such a configuration is provided with a connection structure 400 by welding on one side of the cover of the electric energy storage device 10, and with other electric energy storage devices. To facilitate connection or connection with electrical devices. In particular, the electrical energy storage device assembly 1 having a connection structure of the present invention is for connecting the connection structure 400 to a terminal 410 connected to the electrical energy storage device 10 and other devices such as a bus bar or an electrical device. By configuring the auxiliary terminal 420 to be used, it is possible to support adaptive use according to various environments. In particular, the auxiliary terminal 420 ensures stability of the electrical energy storage device 10 by removing unnecessary heating elements due to pressurization or other welding of physical force directly to the electrical energy storage device 10 in the process of connecting the bus bars. Supports stable and reliable device connection.

The electrical energy storage device 10 includes a case 200 in which the electrode element 300 illustrated in FIG. 2 is disposed, an upper cover 110 disposed on the case 200 and a lower portion disposed under the case 200. It includes a cover 120. The electrical energy storage device 10 having such a configuration is provided so that at least one of the upper cover 110 and the lower cover 120 is fastened to the connection structure 400. In particular, the terminal 410 of the connection structure 400 may be inserted and welded to the fastening groove 111 formed in the center of the upper cover 110 and the lower cover 120. The fastening groove 111 is provided in a cylindrical shape in which the upper portion is engraved and exposed as shown. The fastening groove 111 has a predetermined diameter and is formed.

When the electrode element 300 is accommodated, the case 200 surrounds the outside of the electrode element 300 and serves to protect the electrode element 300 from thermal and physical shocks from the outside. The above-described case 200 may be provided in various shapes according to the winding form of the electrode element 300. That is, when the electrode element 300 is wound in a cylindrical shape, the case 200 may be provided in a hollow shape with a hollow and open front and rear surfaces. The front cover 110 described above is coupled to the front surface of the case 200 in which the front and rear surfaces are opened, and the lower cover 120 may be coupled to the rear surface. The case 200 may be made of a material having a certain rigidity, such as a metal material or a reinforced plastic material.

The electrode element 300 is configured such that an electric double layer capacitor is wound around the core 310 in the center. The electrode element 300 serves to substantially store and discharge electrical energy. The electrode element 300 may be provided to have an electrically insulated state with the core 310 made of a metal material or a plastic material in the center, and an electrically insulated state with the inner surface of the case 200.

Referring to FIG. 2, the electrode element 300 of the present invention is wound around a core 310 disposed centrally in a state in which the positive electrode plate 340, the negative electrode plate 350, and the separators 330 are stacked, respectively. Can be configured. At this time, after the separator 330 is disposed on the upper side, the cathode plate 350, and again the separator 330 after the separator 330 is wound around the stacked plate structure around the core 310, so that the electrode element 300 is Can be configured. Here, the separator 330 may be a structure through which the electrolyte can be transmitted while electrically insulating the positive electrode plate 340 and the negative electrode plate 350.

In addition, the electrode element 300 may include a first cover 360 covering a wound cylindrical top by a predetermined height and a second cover 370 covering a bottom by a predetermined height. Here, the first cover 360 is in contact with the upper portion of the positive electrode plate 340, for example, the positive electrode plate 340 of at least one point of the wound cylindrical electrode element 300, and the second cover 370 is a wound cylindrical electrode element ( The cathode plate 350 of at least one point of 300, for example, is in contact with the top of the cathode plate 350. In this process, contact with the positive electrode plate 340 and the negative electrode plate 350 may be formed by laser welding or the like. As a result, the first cover 360 may serve as an anode lead of the electrode element 300 and the second cover 370 may serve as a cathode lead of the electrode element 300. Alternatively, an opposite polarity lead may be performed according to a designer's design method or an arrangement of electrode elements 300.

Meanwhile, the wound cylindrical electrode elements 300 are spaced apart from each other so that the upper end of the positive electrode plate 340 protrudes upwards than the negative electrode plate 350 and the lower end of the negative electrode plate 350 protrudes downwards than the positive electrode plate 340. It may be a plate structure that is stacked in a twisted form. Accordingly, the first cover 360 formed on the wound cylindrical electrode element 300 may be more easily contacted or welded with the positive electrode plate 340, and the second cover 370 may be more easily with the negative electrode plate 350. Can be contacted or welded.

Referring back to FIGS. 1 and 3, the upper cover 110 may be provided in a disc shape having a predetermined thickness as shown, and the electrical contact with the electrode element 300 disposed inside the case 200 is more robust. As shown, a certain number of contact grooves 112 may be provided based on the center line. Since these contact grooves 112 are provided in an internally protruding form of the upper cover 110, when viewed from the inside of the upper cover 110, they have a contact protrusion shape. The contact protrusions generated by the contact grooves 112 are in electrical contact with the upper end of the electrode element 300, for example, the first cover 360. On the other hand, the fastening groove 111 disposed in the center of the upper cover 110 is also provided in the shape of a circular protrusion when viewed from the inner surface of the upper cover 110, and the circular protrusion is also provided at the upper end of the electrode element 300 In contact with the first cover 360 serves as an electrode.

The contact grooves 112 of the upper cover 110 are arranged at 120-degree intervals based on the fastening groove 111 disposed in the center as shown. The number and arrangement of the contact grooves 112 is provided to stably support the contact of the electrode element 300 with the first cover 360, and may be modified in various forms such as two or four according to the designer's intention. It is possible. As the contact groove 112 is provided, the peripheral area of the upper cover 110 is provided in a protruding form compared to the contact groove 112. The above-described upper cover 110 is formed of a metal material and may serve as a first polarity terminal through contact with the electrode element 300. For example, the upper cover 110 may be formed of a variety of metals having excellent electrical conductivity, such as copper, aluminum, or alloys thereof, or materials equivalent thereto.

The lower cover 120 may be provided in the same shape as the upper cover 110. That is, when the upper cover 110 is disposed to close the front opening of the case 200 through which the front and rear surfaces pass, the lower cover 120 may be disposed to close the rear opening of the case 200. The lower cover 120 is also provided with a fastening groove in the central portion similar to the upper cover 110, and contact grooves may be arranged at a predetermined angle radially around the fastening groove. The contact grooves of the lower cover 120 may be in electrical contact with the second cover 370 provided on the electrode element 300. The fastening groove of the lower cover 120 is also disposed in contact with the center of the electrode element 300.

Meanwhile, the lower cover 120 may be provided as a part of the case 200. In this case, the lower cover 120 may be provided in a different shape from the upper cover 110. When the lower cover 120 is provided as a part of the case 200, the lower cover 120 may simply be a part of the bottom surface of the case 200. In this case, a separate fastening groove or a contact groove may not be provided in the lower cover 120, and may serve as a ground terminal while only serving to form one surface of the case 200.

The connection structure 400 is inserted into the fastening groove 111 provided in the center of the upper cover 110 or the lower cover 120 provided in the electrical energy storage device 10 to facilitate connection with other devices such as a bus bar, etc. It is a configuration that supports to perform. In particular, referring to FIG. 3, the connection structure 400 according to an embodiment of the present invention may be disposed in a form fixed to the fastening groove 111 while the auxiliary terminal 420 and the terminal 410 are fastened as illustrated. .

The terminal 410 is made of a metal material capable of heating welding, arc welding, or laser welding, and is seated in the fastening groove 111. The terminal 410 includes a terminal body 412 and a through hole 411 formed in the center of the terminal body 412, and is provided in a ring-shaped cylindrical or cylindrical shape. The through hole 411 is formed to have a smaller diameter than the fastening hole 429 formed in the auxiliary terminal 420 to support the auxiliary terminal 420 to be fastened to the terminal 410 by inserting a bolt or screw. In this case, a thread may be formed on the inner circumferential surface of the through hole 411. The bolt or screw inserted into the through hole 411 is a fastening hole 429 of the auxiliary terminal 420 to support the screwing of the auxiliary terminal 420 and the terminal 410 that are inserted outside the fastening hole 429. It consists of a header portion having a larger diameter. On the other hand, if the connection structure 400 does not support screw fastening between the terminal 410 and the auxiliary terminal 420, thread formation may be excluded from the inner circumferential surface of the through hole 411.

The overall diameter of the terminal 410 may have the same diameter as the diameter of the fastening groove 111. And the terminal 410 is inserted and welded to the fastening groove 111 formed in the center of the upper cover 110 of the electrical energy storage device 10. As described above, heating or arc welding may be performed as described above, but laser welding may be used to prevent damage to the electrode element 300 inserted inside the case 200.

The height of the terminal 410 may be formed to a length greater than the depth of the fastening groove 111. Accordingly, when the terminal 410 is fixed by welding after being inserted into the fastening groove 111, the upper end portion of the terminal 410 is disposed to protrude from the opened upper surface of the fastening groove 111. The height of the upper end of the terminal 410 protruding from the upper surface of the fastening groove 111 is greater than or equal to the thickness of the plate portion where the fastening hole 429 is formed in the auxiliary terminal 420 to support the coupling with the auxiliary terminal 420. It can be formed to a height. Or, when the terminal 410 and the auxiliary terminal 420 are screwed, the height of the upper end of the terminal 410 protruding from the upper surface of the fastening groove 111 is equal to the thickness of the plate portion in which the fastening hole 429 of the auxiliary terminal 420 is formed. It may be the same or less than the thickness. Here, even though the upper end portion of the terminal 410 is formed to be less than or equal to the thickness of the plate portion, it is not formed below the upper surface of the fastening groove 111.

In addition, the terminal 410 of the present invention separately provides a configuration of a weld portion having a hole through the center of the nut portion, inserts the nut portion into the lower portion of the fastening groove 111, and inserts the welding portion into the fastening groove 111. However, it can also be configured by inserting it on the top of the nut to weld it. In this case, the terminal 410 may be inserted into a bolt or a screw through a hole formed in the center of the weld, and the inserted bolt or screw may be screwed with the nut. In this process, the bolt or screw insertion is inserted after the auxiliary terminal 420 is inserted into the terminal 410 to support the auxiliary terminal 420 to be securely fixed to the terminal 410. In addition, the welding process may be performed in a state where the welding part and the auxiliary terminal 420 are fastened to assist the welding between the auxiliary terminal 420 and the terminal 410. Welding connection of the terminal 410 and the auxiliary terminal 420 using the welding portion located on the nut portion may be performed independently or in parallel with the above-described screw coupling.

The auxiliary terminal 420 includes a first connection portion 421 connected to the terminal 410 and a second connection portion 423 and a second connection portion extending and extending at an angle from the edge of the first connection portion 421 423) may include a third connection portion 425 extending in a predetermined direction in the upper edge region.

The first connection portion 421 is formed of a rectangular or square plate material, and a fastening hole 429 is formed at the center to engage the upper end portion of the terminal 410. To this end, the diameter of the fastening hole 429 may be formed to be the same or similar to the diameter of the terminal 410. And the thickness of the plate of the first connection portion 421 is formed with the same thickness or a smaller thickness or the same thickness or a larger thickness than the height of the upper end of the terminal 410 protruding from the fastening groove 111 according to the coupling method with the terminal 410 Can be formed. That is, as described above, when the upper end portions of the first connection portion 421 and the terminal 410 are laser-welded, the thickness of the first connection portion 421 is formed to a thickness smaller than the upper end portion of the terminal 410, and after welding, from the lateral direction. It can be designed to have a strong durability against the applied physical force.

In addition, when the first connection portion 421 and the terminal 410 are screwed, the first connection portion 421 has a screw having a thickness of the first connection portion 421 equal to or greater than the height of the upper end portion of the terminal 410. And terminal 410 may be supported to be screwed with sufficient force. That is, the upper end of the terminal 410 protruding from the fastening groove 111 may be provided so as not to deviate from the upper surface of the first connection portion 421 in order to support the lifting from occurring when screwing. On the other hand, the overall size of the first connection portion 421 may be formed to have a size that does not deviate from the front surface of the upper cover 110 in a lateral direction, and may be provided, for example, having a certain area more than the size of the fastening groove 111. have.

The second connection part 423 is a configuration provided to space the third connection part 425 from the first connection part 421 at a predetermined interval. The second connection portion 423 having such a configuration may be vertically extended from the first connection portion 421, and may be stretched with a predetermined slope according to a design method. The second connecting portion 423 is formed to have a vertical width equal to the vertical width of the first connecting portion 421 by being elongated with the first connecting portion 421. In addition, the height of the elongation of the second connection part 423 may be provided to have a predetermined length according to a design method, depending on an environment in which the electrical energy storage device 10 is used, such as characteristics of an electronic device connected to the electrical energy storage device 10. Accordingly, it may be provided in various forms. Meanwhile, although not illustrated, a hole penetrating the front and rear surfaces of the extended second connecting portion 423 may be further provided. The hole penetrating the front and rear surfaces of the second connection portion 423 supports a bus bar or the like to be fastened to the second connection portion 423. As a result, the auxiliary terminals 420 having holes formed in the second connecting portion 423 and the third connecting portion 425 may support the fastening of the bus bar to the required place according to the working method or demand of the operator.

The third connection portion 425 extends from the upper edge of the second connection portion 423 and is electrically connected to a bus bar or an electronic device. Since the third connection portion 425 extends from the second connection portion 423, the third connection portion 425 is formed to have the same width as the vertical width of the second connection portion 423. In addition, the third connection portion 425 may be provided to be extended in a direction parallel to the first connection portion 421. Although the illustrated drawing shows that the third connection portion 425 is provided to face the first connection portion 421, other shapes may be manufactured according to a design method. Meanwhile, a connection hole 426 may be formed in the third connection portion 425 of the present invention for screwing with a bus bar or the like. The connection hole 426 is aligned with a screw coupling hole formed in the bus bar, and a screw thread may be formed to screw the screw or the like. The diameter of the connection hole 426 has the same diameter as the screw coupling hole formed in the bus bar. That is, the diameter of the connection hole 426 is formed to have a diameter corresponding to the diameter of the insertion portion of the screw or bolt used.

As described above, the connection structure 400 of the present invention is secondary to the terminal 410 fastened to the fastening groove 111 of the electrical energy storage device 10 and the terminal 410 fixed to the fastening groove 111. By providing an auxiliary terminal 420 that is fastened and fixed by, it is supported to fasten through the auxiliary terminal 420 without directly fastening the electrical energy storage device 10 to a bus bar or an electronic device. Accordingly, the connection structure 400 of the present invention prevents physical pressure or high temperature environment applied in the fastening process from being directly provided to the electrical energy storage device 10, and also uses the auxiliary terminal 420 to fasten the environment. It supports to protrude by a predetermined height from the cover of the electrical energy storage device (10). Such a fastening environment not only facilitates connection of the bus bar or the electronic device to the electrical energy storage device 10, but also facilitates the securing of space for the use of tools required in the connection process.

Meanwhile, in FIG. 1 and FIG. 3, the position where the connection structure 400 is disposed is described as the upper cover 110, but the present invention is not limited thereto. That is, the description of the upper cover 110 may be applied to the lower cover 120 in the same way.

4 illustrates another form of the auxiliary terminal 420 and one form of a bus bar among the connection structures 400 according to an embodiment of the present invention.

Referring to FIG. 4, the auxiliary terminal 420 of the present invention shows that the fourth connection portion 427 is formed in a direction not facing the first connection portion 421 as shown in 401. In more detail, the auxiliary terminal 420 shown in 401 is a first connection portion 421 in which a fastening hole 429 is inserted into a terminal 410 that is inserted and fixed into a fastening groove 111 of the cover 110. , From the edge of the first connection portion 421, the second connection portion 423 extending vertically or at a certain angle to the first connection portion 421, the second connection portion 423 to the second connection portion 423 from the upper edge It may be configured to include a fourth connection portion 427 extending vertically or at a predetermined angle. In particular, the fourth connection portion 427 is disposed in a direction opposite to the position where the first connection portion 421 is disposed based on the second connection portion 423.

In the center of the fourth connection portion 427, a connection hole 426 for screwing a bus bar 500 or another auxiliary terminal is formed. The connection hole 426 formed in the fourth connection portion 427 may be aligned with the screw coupling hole or connection hole formed in the bus bar 500 or other auxiliary terminals, and then coupled with the bus bar 500 according to the screw insertion. . To this end, threads may be formed on the inner circumferential surface of the connection hole 426.

The auxiliary terminal 420 having such a configuration may support connection between the electrical energy storage devices 10 without adding a separate bus bar 500 device. That is, the auxiliary terminal 420 connected to the terminal 410 inserted and fixed in the fastening groove 111 of the cover 110 of the specific electrical energy storage device 10 is an auxiliary terminal disposed in another electrical energy storage device 10 It can be screwed with 420. To this end, the height of the second connection part of the first auxiliary terminal disposed in the specific electrical energy storage device, for example, the first electrical energy storage device, and the second auxiliary terminal disposed in the second electrical energy storage device connected to the first electrical energy storage device The heights of the second connection parts may be different from each other. That is, the height of the second connection portion of the first auxiliary terminal may be formed to be larger or smaller than the height of the second connection portion of the second auxiliary terminal, so that the fourth connection portions may overlap each other. Meanwhile, in order to arrange the fourth connecting portions so as to overlap each other, the fourth connecting portions may be formed to have a length greater than or equal to a radius of the cover. In more detail, the center distance of the connection hole 426 of the fourth connection portion 427 from the center of the fastening hole 429 of the first connection portion 421 is assumed to be disposed on the same plane as the radius of the cover 110 Can be formed. Accordingly, when the fourth connection portion of the first electrical energy storage device and the fourth connection portion of the second electrical energy storage device are aligned with each other, the connection holes are aligned, and bolts or screws are inserted into the aligned connection holes described above to provide auxiliary terminals. You can connect to each other. This structure can be used in a structure that connects two electrical energy storage devices 10. In addition, the second connection portion 423 may be provided with a connection hole penetrating the front and rear surfaces to support coupling with a bus bar or the like through screw coupling.

Meanwhile, the auxiliary terminal 420 of the present invention may be provided in a form including only the first connection portion 421 and the second connection portion 423 as shown in 403. The first connection part 421 has a fastening hole 429 that is inserted into and fixed to the upper end of the terminal 410 that is inserted and fixed into the fastening groove 111 of the electrical energy storage device 10.

The second connection portion 423 extends perpendicularly or at an angle to the first connection portion 421 in an edge region of the first connection portion 421. The second connection portion 423 is formed with a connection hole 426 in the center. Screw connection holes 502 formed in the bus bar 500 or the like are arranged in the connection hole 426, and screws or bolts are inserted to couple the second connection portion 423 to the bus bar 500. At this time, the bus bar 500 is vertically disposed in the longitudinal direction and is in contact with the front or rear of the second connecting portion 423 extended vertically to the first connecting portion 421, the screw coupling hole 502 and the connecting hole 426 ) Can be screwed in an aligned state. On the other hand, the fourth connecting portion 427 and the second connecting portion 423 are provided to support screw coupling using the connecting holes 426, but the fourth connecting portion 427 and the second connecting portion having the connecting hole 426 are formed as necessary. 423 may be welded to a bus bar or device using laser welding.

The configuration shown in 405 is the bus bar 500. The bus bar 500 is provided with a bar-type bus body 501 having a predetermined width, length, and thickness, and screw coupling holes 502 formed at both edges of the bus body 501. The bus body 501 is disposed in the longitudinal direction so that the screw coupling hole at one end is fastened to the auxiliary terminal fastened to the terminal of the first electrical energy storage device, and the screw coupling hole provided at the other end is connected to the terminal of the second electrical energy storage device. By being fastened to the fastened auxiliary terminal, it supports to electrically connect multiple electrical energy storage devices. In particular, when three or more electrical energy storage devices are connected, a plurality of bus bars 500 may be provided, and connections between the bus bars 500 may be performed. For example, the auxiliary terminal provided in the specific electrical energy storage device may be screwed with a plurality of bus bars 500 or combined with laser welding.

5 is a view showing a method of manufacturing an electrical energy storage device assembly having a connection structure according to an embodiment of the present invention.

Referring to FIG. 5, in the manufacturing method of the electrical energy storage device assembly of the present invention, first, in step S101, the electrical energy storage device 10 in which the fastening groove 111 is formed in the center of the cover 110 is provided. The fastening groove 111 may be provided in a cylindrical engraved shape. In addition, the fastening groove 111 may serve as a terminal having a specific polarity in the electrical energy storage device 10.

Next, in step S103, the terminal 410 is disposed in the fastening groove 111 and welding is performed. In this step, the terminal 410 is made of a weldable material, and after inserting the terminal 410 into the fastening groove 111, laser welding is performed to fix the terminal 410 to the fastening groove 111. The terminal 410 inserted into the fastening groove 111 may be provided in a cylindrical shape with a through hole 411 in the center. And the height of the terminal 410 is formed larger than the depth of the fastening groove 111. Accordingly, when the terminal 410 is inserted and fixed in the fastening groove 111, one end of the upper end of the terminal 410 is protruded from the upper surface of the fastening groove 111.

Thereafter, in step S105, the first connection portion 421 of the auxiliary terminal 420 having the fastening hole 429 formed is aligned and inserted into the protruding upper portion of the terminal 410. Accordingly, the outer circumferential surface of the protruding upper end of the terminal 410 may be disposed in contact with the inner circumferential surface of the fastening hole 429 of the auxiliary terminal 420. Here, the terminal 410 and the auxiliary terminal 420 may be fixed by laser welding the upper ends of the fastening holes 429 and the terminals 410.

In addition, at step S107, one end of the bus bar 500 or a separately provided electric device is connected to the auxiliary terminal 420. To this end, the screw coupling holes 502 formed on both edges of the bus bar 500 are aligned with the connection holes 426 formed on one side of the auxiliary terminal 420, and the screw coupling holes 502 are formed using screws or bolts. Through the connection hole 426, the auxiliary terminal 420 and the bus bar 500 are screwed together. After or before, the present invention may also support the alignment of the screw coupling hole 502 and the connection hole 426 of the auxiliary terminal 420 and the bus bar 500 and welding welding using laser welding. At this time, the screw coupling hole 502 and the connection hole 426 may be used as alignment marks.

As described above, according to the electrical energy storage device assembly including the connection structure of the present invention and its manufacturing method, the present invention connects the terminal 410 of the connection structure 400 to the fastening groove 111 of the electrical energy storage device 10 ), And by using the auxiliary terminal 420 connected to the terminal 410, the connection with the electric device or the connection with the busbars 500 in series or parallel connection between electrical energy storage devices. To make it easier. In particular, the present invention is provided for the auxiliary terminal 420 to protrude from the surface of the cover 110 of the electrical energy storage device 10 for laser welding or connection of a screw-coupled bus bar 500 or connection with an electrical device. It can easily support securing the working space.

Although the present invention has been described above using some preferred embodiments, these embodiments are illustrative and not limiting. As described above, those skilled in the art to which the present invention pertains will understand that various changes and modifications can be made according to the theory of equality without departing from the spirit of the present invention and the scope of the rights set forth in the appended claims.

10: electrical energy storage device 110: upper cover
120: lower cover 200: case
300: electrode element 310: core
400: connecting structure 410: terminal
420: auxiliary terminal 426: connecting hole
429: Fastening hole 111: Fastening groove
500: bus bar 502: screw coupling hole

Claims (13)

An electrical energy storage device having a fastening groove formed in the center of the cover;
A main terminal inserted into the fastening groove and provided to be weldable;
It includes a secondary terminal that is fastened to the main terminal and supports connection with a separate device at a position spaced apart from the cover of the electrical energy storage device.
The main terminal
A through hole formed in the center;
Includes; a terminal body having a ring shape of a cylinder forming the through-hole,
The diameter of the terminal body is an electrical energy storage assembly including a connection structure, characterized in that provided in a size that can be inserted into the fastening groove. delete According to claim 1,
The main terminal
An electrical energy storage assembly including a connection structure, characterized in that it has a height greater than the depth of the fastening groove and is formed and inserted and fixed to the fastening groove so that an upper end protrudes from the upper surface of the fastening groove. According to claim 3,
The auxiliary terminal
A first connection part inserted into an upper end of the protruding main terminal and having a fastening hole fastened to the main terminal through at least one of laser welding and screw coupling;
A second connection portion connected to the first connection portion and extending perpendicularly or at a predetermined angle to the first connection portion;
A third connection portion extending perpendicularly to the second connection portion or having an angle, and disposed to face the first connection portion;
Electrical energy storage assembly comprising a connection structure, characterized in that it comprises a. According to claim 3,
The auxiliary terminal
A first connection part inserted into an upper end of the protruding main terminal and having a fastening hole fastened to the main terminal through at least one of laser welding and screw coupling;
A second connection portion connected to the first connection portion and extending perpendicularly or at a predetermined angle to the first connection portion;
A fourth connector extending vertically or at a predetermined angle to the second connector, and disposed symmetrically to the first connector based on the second connector;
Electrical energy storage assembly comprising a connection structure, characterized in that it comprises a. The method of claim 4 or 5,
The second connection part
A connection hole provided in the center to enable screw coupling;
Electric energy storage assembly comprising a connection structure, characterized in that it comprises a. According to claim 4,
The third connection part
A connection hole provided to penetrate the front and rear surfaces;
Electric energy storage assembly comprising a connection structure, characterized in that it comprises a. According to claim 3,
The auxiliary terminal
A first connection part inserted into an upper end of the protruding main terminal and having a fastening hole fastened to the main terminal through at least one of laser welding and screw coupling;
A second connection portion which is connected to the first connection portion and has a connection hole that extends vertically or at a predetermined angle to the first connection portion and penetrates the front and rear surfaces in the center;
Electrical energy storage assembly comprising a connection structure, characterized in that it comprises a. According to claim 1,
A bus bar connected to at least one of a connection hole formed in the auxiliary terminal and a screw connection or a welding connection;
Electrical energy storage assembly comprising a connection structure, characterized in that it further comprises. Providing an electrical energy storage device having a fastening groove formed in the center of the cover;
A fixing step of disposing and fixing a main terminal formed of a weldable material in the fastening groove;
Including the connection step of connecting the auxiliary terminal supporting the connection with another device at a position spaced apart from the cover to the main terminal;
The connecting step
Aligning the fastening hole provided at one end to the protruding upper end of the main terminal;
Fixing the fastening hole and the upper end of the main terminal by laser welding;
Method of manufacturing an electrical energy storage assembly having a connection structure comprising a. The method of claim 10,
The fixing step
Laser welding the main terminal such that a portion of the upper end protrudes from the fastening groove;
Method of manufacturing an electrical energy storage assembly having a connection structure comprising a. delete The method of claim 10,
Aligning one side of the bus bar with the connection hole formed in the auxiliary terminal and screwing the bus bar to the connection hole of the auxiliary terminal;
Aligning one side of the bus bar with a connection hole formed in the auxiliary terminal, and laser welding the bus bar to one end where the connection hole of the auxiliary terminal is formed;
Method of manufacturing an electrical energy storage assembly having a connection structure, characterized in that it further comprises at least one step.

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