KR102101011B1 - Energy storage system - Google Patents

Abstract

Power storage device according to an embodiment of the present invention, the container is provided with a storage space therein, accommodated in a container, a battery rack including a battery pack, stacked side by side with a battery rack, for opening and closing the current of the battery rack And a battery bar unit and a bus bar unit that electrically connects the battery block unit and the battery rack.

Description

Electric power storage device {ENERGY STORAGE SYSTEM}

The present invention relates to a power storage device.

The secondary battery having high applicability according to the product group, and having electrical characteristics such as high energy density, etc. is not only portable equipment, but also electric vehicles (EV, Electric Vehicle) or hybrid vehicles (HEV, Hybrid Electric Vehicle) driven by electric driving sources. It is used universally. This secondary battery is drawing attention as a new energy source for eco-friendliness and energy efficiency improvement, in that not only does not generate any by-products due to the use of energy, as well as a primary advantage that can dramatically reduce the use of fossil fuels.

Currently widely used secondary batteries include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, and nickel zinc batteries. The operating voltage of the unit secondary battery cell, that is, the unit battery cell is about 2.5V to 4.2V. Therefore, when a higher output voltage is required, a battery pack may be configured by connecting a plurality of battery cells in series. In addition, a battery pack may be configured by connecting a plurality of battery cells in parallel according to the charge / discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack may be variously set according to a required output voltage or charge / discharge capacity.

The battery pack including the plurality of battery cells as a secondary battery may also be configured to combine the battery racks including the plurality of battery packs according to various voltage and capacity requirements to configure a power storage device.

Conventional power storage devices include, in general, a container in which an accommodating space is provided, a plurality of battery racks including a plurality of battery packs accommodated in the container, a battery disconnecting unit for opening and closing current of the plurality of battery racks, and a battery disconnect And a plurality of bus bar cables configured to electrically connect the unit and the plurality of battery racks.

Here, since the plurality of busbar cables are composed of positive and negative busbar cables, they are generally provided at twice the number of battery racks. For example, when the battery rack is composed of 30, the bus bar cables may be provided in 60. These busbar cables are generally installed in a container composed of thick cables of about 70 sqm to prevent short circuit or damage due to external impact.

However, in such a conventional electric power storage device, a plurality of busbar cables having such a thick thickness and provided in a considerable number occupy a significant portion of the space in the container, so there is a problem that the space efficiency in the container is deteriorated.

In addition, in the conventional power storage device, since the heat generation amount also increases due to the plurality of busbar cables, there is a problem that the air conditioning capacity in the entire container also increases.

In addition, in the conventional power storage device, the odor generated due to the characteristics of the cable when electric current flows along these busbar cables may be a problem, and the cable composed of a plurality of strands may adversely affect the aesthetics in the container. There is a problem.

In addition, in the conventional power storage device, since the number of cables has to increase significantly depending on the number of battery racks, there is an inevitable problem of the increase in manufacturing cost.

Accordingly, an object of the present invention is to provide a power storage device capable of realizing a more economical structural design by increasing space efficiency in a container, reducing heat generation, reducing odor in the container, improving aesthetics, and reducing manufacturing cost. will be.

In order to solve the above object, the present invention, as a power storage device, a container is provided with a receiving space therein; At least one battery rack accommodated in the container and including at least one battery pack; A battery blocking unit stacked side by side with the at least one battery rack to open and close the current of the at least one battery rack; And a bus bar unit that electrically connects the battery disconnecting unit and the at least one battery rack.

The bus bar unit may include: a plate bus bar formed to have a predetermined length along a stacking direction of the at least one battery rack and the battery blocking unit; And a plurality of connecting bus bars connecting the plate bus bar and the at least one battery rack and the plate bus bar and the battery disconnecting unit.

The plate bus bar may be formed to have a predetermined length along the stacking direction, and an anode plate electrically connected to an anode of the at least one battery rack and an anode of the battery blocking unit; And a negative electrode plate disposed at a predetermined height apart from the positive electrode plate and electrically connected to a negative electrode of the at least one battery rack and a negative electrode of the battery blocking unit.

The plate bus bar may be disposed above the inner wall of the container and between the at least one battery rack and the battery blocking unit.

The plate bus bar may be provided with a rigid metal material.

The plurality of connecting bus bars may include: a plurality of positive bus bars connecting the positive plate and the at least one battery rack and the positive plate and the battery blocking unit; And a plurality of negative bus bars connecting the negative plate to the at least one battery rack and the negative plate to the battery disconnecting unit.

The plurality of positive bus bars and the plurality of negative bus bars may be screwed to the positive plate and the negative plate, respectively.

The plurality of anode busbars and the plurality of cathode busbars may each be provided with a rigid metal material.

The bus bar unit may include at least one bus bar support member that supports the plate bus bar and is fixed to the inner wall of the container.

One end of the at least one busbar support member may be mounted on the inner wall of the container, and the other end of the at least one busbar support member may be mounted on the plate busbar.

The at least one bus bar support member may be made of a steel material having a predetermined rigidity.

The other end of the at least one bus bar support member may be insulated coated.

The bus bar support members may be provided in plural, and the plurality of bus bar support members may be arranged to be spaced apart from each other along the stacking direction.

The battery rack may be provided in plural, and the plurality of battery racks may be stacked side by side along the longitudinal direction of the container.

The battery blocking unit may be provided on at least one side of both outermost sides of the plurality of battery racks.

According to various exemplary embodiments as described above, an electric power storage device capable of realizing a more economical structural design by increasing space efficiency in a container, reducing heat generation, reducing odor in the container, improving aesthetics, and reducing manufacturing cost. Can provide.

The following drawings attached to this specification are intended to illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the invention described below, and thus the present invention is described in such drawings. It is not limited to interpretation.
1 is a view for explaining a power storage device according to an embodiment of the present invention.
FIG. 2 is an enlarged view of part A of FIG. 1.
3 is an enlarged view of part B of FIG. 2.

The present invention will become more apparent by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the embodiments described herein are illustratively shown to help understanding of the present invention, and that the present invention can be implemented in various ways differently from the embodiments described herein. In addition, in order to help the understanding of the invention, the accompanying drawings are not drawn to scale, but the dimensions of some components may be exaggerated.

1 is a view for explaining a power storage device according to an embodiment of the present invention, FIG. 2 is an enlarged view of part A of FIG. 1, and FIG. 3 is an enlarged view of part B of FIG. 2.

1 to 3, the power storage device 1 includes a container 10, a battery rack 20, a BMS unit 30, a battery blocking unit 40, and a busbar unit 50 can do.

The container 10 forms an external appearance of the power storage device 1, and may provide a storage space for accommodating various components constituting the power storage device 1 therein.

The battery rack 20 is accommodated in the container 10, and may be provided in at least one. Hereinafter, in the present embodiment, the battery rack 20 will be described as being limited to a plurality.

The plurality of battery racks 20 may be provided to be stacked with each other along a predetermined direction in the container 10. In this embodiment, the plurality of battery racks 20 may be arranged to be stacked side by side in the container 10 along the longitudinal direction of the container 10, that is, the left and right directions of the container 10. have.

Each of the plurality of battery racks 20 may include at least one battery pack 25. Hereinafter, in this embodiment, a plurality of the battery packs 25 are provided, and it will be described as limited to being stacked along the vertical direction of each battery rack 20.

Each of the plurality of battery packs 25 may include at least one battery module. Hereinafter, in the present embodiment, the battery module will be described as being limited to a plurality.

The plurality of battery modules may include at least one battery cell. Hereinafter, in the present embodiment, the battery cells will be described as being limited to a plurality.

Each of the plurality of battery cells may be provided as a pouch-type secondary battery. Since the pouch type secondary battery is well known, a detailed description thereof will be omitted below. In addition, of course, the plurality of battery cells may be provided as secondary batteries according to other methods or shapes other than the pouch-type secondary battery.

The BMS unit 30 is for system operation of the power storage device 1 and may be provided on one side of the container 10. The BMS unit 30 may control and monitor the voltage, current, temperature, and charge amount of the plurality of battery racks 20.

The battery blocking unit 40 is for opening and closing the current of the at least one, the plurality of battery racks 20 according to this embodiment, and the at least one battery rack 20 in the container 10 Can be stacked side by side.

The battery blocking unit 40 may be electrically connected to the plurality of battery racks 20 to selectively block current of the plurality of battery racks 20. As an example, the battery blocking unit 40 may block an overcurrent when the plurality of battery racks 20 flow, and the plurality of battery racks 20 may be maintained for maintenance, maintenance, etc. Current of the two battery racks 20 may be cut off.

The battery blocking unit 40 may be provided in plural according to the number of the plurality of battery racks 20. This is because a larger number of battery racks 20 may be provided than the number of battery racks 20 that can be covered at a preset electric shock capacity of the battery blocking unit 40. Hereinafter, in the present embodiment, 16 battery racks 20 are provided, and a description will be limited to those provided with a pair of battery blocking units 40.

The pair of battery blocking units 40 may be electrically connected to eight battery racks 20, respectively. Here, the pair of battery cut-off units 40 are provided on both outermost sides of the plurality of battery racks 20, and in the present embodiment, on both outermost sides of the left and right directions of the battery racks 20, respectively. You can. This is to make maintenance / repair work of the worker or the like easier during future maintenance / repair of the worker or the like. On the other hand, when the battery cut-off unit 40 is provided as one, it may be provided on either side of the outermost both sides of the plurality of battery racks 20 for ease of work, such as the operator.

The bus bar unit 50 may electrically connect the battery blocking unit 40 and the at least one battery rack 20. In this embodiment, the battery blocking unit 40 is provided as a pair, and the bus bar unit 50 may also be provided as a pair.

The pair of bus bar units 50 may electrically connect the battery disconnecting unit 40 and the plurality of battery racks 20, respectively. Specifically, any one bus bar unit 50 provided on the left side in the container 10 includes the battery blocking unit 40 and the eight battery racks 20 provided on the left side in the container 10. Electrically connecting, the other bus bar unit 50 provided on the right in the container 10, the battery blocking unit 40 and the eight battery racks provided on the right in the container 10 (20) can be electrically connected.

The pair of bus bar units 50 may include a plate bus bar 100, a plurality of connecting bus bars 200, and a bus bar support member 300, respectively.

The plate bus bar 100 may be formed to have a predetermined length along a stacking direction of the plurality of battery racks 20 and the battery blocking unit 40. The predetermined length is, for example, the plate bus bar 100 may be a length capable of covering eight battery racks 20 and one battery blocking unit 40.

In addition, the plate bus bar 100 may have a plate shape having a rigid metal material. That is, the plate bus bar 100 may be provided as a rigid metal plate having a simple structure instead of a conventional cable.

The plate bus bar 100 may be disposed between the upper side 12 of the inner wall of the container 10 and the plurality of battery racks 20 and the battery blocking unit 40. That is, the plate bus bar 100 is provided on the upper side of the container 10 in the container 10, a user or a worker that may occur due to the plate bus bar 100 in the container 10, etc. The risk of electric shock or safety accidents can be minimized.

Specifically, the plate bus bar 100 may include an anode plate 120 and a cathode plate 160.

The positive electrode plate 120 is formed to have a predetermined length along the stacking direction, and may be electrically connected to the positive electrode of the plurality of battery racks 20 and the positive electrode of the battery blocking unit 40. In this embodiment, each anode plate 120 may be electrically connected to the anodes of the eight battery racks 20 and the anode of one battery blocking unit 40.

The cathode plate 160 and also the anode plate 120 may be formed to have a predetermined length along the stacking direction. The negative plate 160 may be electrically connected to a negative electrode of the plurality of battery racks 20 and a negative electrode of the battery blocking unit 40. In this embodiment, each negative plate 160 may be electrically connected to the negative electrodes of the eight battery racks 20 and the negative electrode of one battery blocking unit 40.

The cathode plate 160 may be disposed to be spaced apart from the anode plate 120 by a predetermined height (h). In this way, since the positive electrode plate 120 and the negative electrode plate 160 are arranged to have a predetermined height (h) difference from each other in the container 10, confirmation or inspection by an operator, etc. may be performed during maintenance or repair of these members. It may be facilitated, and operations such as replacement or repair of these members may also be more easily performed.

The plurality of connection busbars 200 may connect the plate busbar 100 and the plurality of battery racks 20 and the plate busbar 100 and the battery blocking unit 40.

Specifically, the plurality of connection busbars 200 may include a plurality of anode busbars 220 and a plurality of cathode busbars 260.

The plurality of positive bus bars 220 may connect the positive plate 120 and the plurality of battery racks 20 and the positive plate 120 and the battery blocking unit 40. The positive electrode plate 120 may be electrically connected to the positive electrode of the plurality of battery racks 20 and the positive electrode of the battery blocking unit 40 through the plurality of positive electrode bus bars 220.

The plurality of anode bus bars 220 may be provided in the form of a rigid metal bar. That is, the plurality of anode bus bars 220 may be provided as a metal bar of a solid metal material having a simple structure instead of a conventional cable.

Meanwhile, the plurality of positive bus bars 220 may be screwed through the positive plate 120 and the fastening member S. Through such a screw coupling structure, an operator or the like can more simply combine them when the plurality of anode bus bars 220 and the anode plate 120 are connected.

The plurality of negative bus bars 260 may connect the negative plate 160 and the plurality of battery racks 20 and the negative plate 160 and the battery blocking unit 40. The negative electrode plate 160 may be electrically connected to the negative electrode of the plurality of battery racks 20 and the negative electrode of the battery blocking unit 40 through the plurality of negative electrode bus bars 260.

The plurality of cathode bus bars 260 may be provided in a metal bar shape of a rigid metal material, such as the plurality of anode bus bars 220. That is, the plurality of cathode bus bars 260 may also be provided as metal bars of a rigid metal material having a simple structure instead of a conventional cable.

Meanwhile, the plurality of cathode bus bars 260 may be screwed through the cathode plate 160 and the fastening member S as the plurality of anode bus bars 220. Through such a screw coupling structure, an operator or the like can more easily combine them when the plurality of cathode bus bars 260 and the cathode plate 160 are connected.

The bus bar support member 300 supports the plate bus bar 100 and may be fixed to the inner wall 12 of the container 10. To this end, one end 302 of the bus bar support member 300 is mounted on the inner wall 12 of the container 10, specifically, on the upper side 12 of the inner wall of the container 10, and the bus bar The other end 306 of the support member 300 may be mounted on the plate bus bar 100.

The bus bar support member 300 may be made of a steel material having a predetermined stiffness to improve the support strength. In this case, the other end 306 of the bus bar support member 300 may be insulated coated to prevent an electrical short circuit with the plate bus bar 100. The bus bar support member 300 may not only be limited to this, but may also be provided with a metal material as well as a non-metal material that can secure electrical insulation if it has a desired stiffness.

The bus bar support member 300 may be provided in plural to further improve the support strength. At this time, the plurality of bus bar support members 300 can more stably support the plate bus bar 100 in the stacking direction, that is, the longitudinal direction of the container 10, that is, the container ( 10) may be arranged a predetermined distance apart from each other along the left and right directions.

As described above, in the power storage device 1 according to the present embodiment, the bus bar unit 50 for electrical connection of the battery rack 20 and the battery disconnecting unit 40 has a plurality of bus bars as in the prior art. Since it is made of a plate and bar-shaped structure having a simple structure rather than cables, it is possible to significantly reduce the manufacturing cost compared to a plurality of conventional busbar cables and to maximize the space efficiency in the container 10. .

In addition, in the power storage device 1 according to the present embodiment, since a plurality of busbar cables as in the prior art are not used, the heat generation problem caused by the plurality of busbar cables can be solved. The air conditioning capacity in the container 10 can also be lowered.

In addition, in the power storage device 1 according to the present embodiment, cables composed of a plurality of strands as in the prior art are not used, and the bus bar unit 50 is located inside the container 10. Being disposed, it is possible to remove the odor caused by the conventional cable in advance, and also significantly improve the aesthetics of the container 10 in terms of design.

Therefore, the power storage device 1 according to the present embodiment increases the space efficiency in the container 10, reduces heat generation, reduces odor in the container 10, improves aesthetics, and reduces manufacturing cost. A more economical structural design can be implemented.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is usually in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications can be made by those having knowledge of, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

1: Power storage device
10: Container
20: battery rack
25: battery pack
30: bms unit
40: battery disconnect unit
50: bus bar unit
100: plate bus bar
120: anode plate
160: cathode plate
200: connecting busbars
220: anode busbars
260: cathode busbars
300: bus bar support member

Claims (15)

A container in which an accommodation space is provided;
At least one battery rack accommodated in the container and including at least one battery pack;
A battery blocking unit stacked side by side with the at least one battery rack to open and close the current of the at least one battery rack; And
Includes; a bus bar unit for electrically connecting the battery disconnecting unit and the at least one battery rack,
The bus bar unit,
A plate bus bar formed in a predetermined length along the stacking direction of the at least one battery rack and the battery blocking unit; And
It includes; the plate bus bar and the at least one battery rack and a plurality of connecting bus bars connecting the plate bus bar and the battery disconnecting unit;
The plate bus bar,
A positive electrode plate formed in a predetermined length along the stacking direction and electrically connected to the positive electrode of the at least one battery rack and the positive electrode of the battery blocking unit; And
It includes a negative electrode plate disposed at a predetermined height apart from the positive electrode plate, the negative electrode plate of the at least one battery rack and electrically connected to the negative electrode of the battery blocking unit;
The positive electrode plate and the negative electrode plate,
In the container, the power storage device, characterized in that spaced apart from each other along the height direction of the container perpendicular to the stacking direction, one of which is disposed higher than the other one at a predetermined height. delete delete According to claim 1,
The plate bus bar,
And an upper side of the inner wall of the container and between the at least one battery rack and the upper side of the battery blocking unit. According to claim 1,
The plate bus bar,
Power storage device characterized in that it is provided with a rigid metal material. According to claim 1,
The plurality of connecting busbars,
A plurality of positive bus bars connecting the positive plate and the at least one battery rack and the positive plate and the battery blocking unit; And
And a plurality of negative bus bars connecting the negative plate and the at least one battery rack and the negative plate and the battery disconnecting unit. The method of claim 6,
The plurality of positive bus bars and the plurality of negative bus bars, respectively,
The positive electrode plate and the power storage device characterized in that the screw is screwed with the negative plate. The method of claim 6,
The plurality of positive bus bars and the plurality of negative bus bars, respectively,
Power storage device characterized in that it is provided with a rigid metal material. According to claim 1,
The bus bar unit,
And at least one bus bar support member that supports the plate bus bar and is fixed to the inner wall of the container. The method of claim 9,
One end of the at least one bus bar support member,
It is mounted on the inner wall of the container,
The other end of the at least one bus bar support member,
Power storage device, characterized in that mounted to the plate busbar. The method of claim 10,
The at least one bus bar support member,
Power storage device characterized in that it is made of a steel material having a predetermined rigidity. The method of claim 11,
The other end of the at least one bus bar support member,
Power storage device characterized in that the insulating coating. The method of claim 9,
The bus bar support member,
It is provided in plural,
The plurality of bus bar support members,
Power storage device, characterized in that arranged a predetermined distance from each other along the stacking direction. According to claim 1,
The battery rack,
It is provided in plural,
The plurality of battery racks,
Power storage device characterized in that it is stacked side by side along the longitudinal direction of the container. The method of claim 14,
The battery blocking unit,
Power storage device, characterized in that provided on at least one side of the outermost both sides of the plurality of battery racks.

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