KR102029130B1 - Medium and large size battery pack of industrial electric car with high weight - Google Patents

Abstract

Embodiments of the present invention provide a housing, a plurality of battery modules charged with electrical energy, a plurality of module cases accommodating the battery modules, and a bus bar connected to each of the battery modules electrically connected to the positive and negative power sources, respectively. And a supporting member for accommodating and supporting a plurality of module assemblies sequentially stacked in the module assembly and the housing, the supporting member comprising a weight plate made of at least one of cast iron, stone, lead, and concrete. It is possible to provide a medium-large battery pack of an industrial electric vehicle equipped with a sieve.

Description

MEDIUM AND LARGE SIZE BATTERY PACK OF INDUSTRIAL ELECTRIC CAR WITH HIGH WEIGHT}

The present invention relates to a medium-large battery pack of an industrial electric vehicle provided with a weight.

In devices driven by electric motors, batteries and charging systems are important energy sources and battery management systems are needed in systems that require precise control, such as electric cars, but electric forklifts, golf cars, sweepers, motive vehicles, electric aerial work vehicles. Such management systems have not yet been applied in industrial and agricultural devices. In general, in the environment of industrial sites or rural areas, the majority of the equipment uses lead batteries.

 Lead batteries are divided into two types, distilled water supplement type and sealed type. Lithium batteries are also largely divided into lithium-ion type and lithium-iron phosphate type. The charging method of the battery depends on the type of battery.

Recently, industrial equipment such as forklift trucks and aerial work trucks has been manufactured as an electric vehicle so that driving and working may be performed by electric energy. In addition, the industrial electric vehicle as described above constitutes a battery pack consisting of a lithium secondary battery.

However, such conventional industrial electric vehicles needed a weight body that can achieve a weight balance as the work such as lifting a heavy weight. For example, the conventional electric forklift truck has fixed weights so as to achieve a weight balance so that the forklift does not fall forward by the weight of the lifting object by the forklift when lifting the object.

Here, the conventional industrial electric vehicles implemented such a weight in a lead battery (lead-acid battery) or a separate weight. That is, in the case of the lead battery, the weight balance of the industrial electric vehicle may be realized due to the weight of the pole plate, the electrolyte, and the enclosure 100.

However, in the case of the lithium secondary battery, since the weight is lower than that of the lead battery, there is a problem in that an additional weight is required to adopt a battery pack using the lithium secondary battery in an industrial electric vehicle.

Korea Patent Publication No. 10-1777768 (2017.09.06) Korea Patent Publication No. 10-1645812 (2016.07.28)

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention to provide a medium and large battery pack of a weight balanceable industrial electric vehicle that can implement both the supply of electrical energy and the weight balance to the industrial electric vehicle. .

The present invention includes the following examples in order to achieve the above object.

Embodiments of the present invention provide a housing, a plurality of battery modules charged with electrical energy, a plurality of module cases accommodating the battery modules, and a bus bar connected to each of the battery modules electrically connected to the positive and negative power sources, respectively. And a supporting member for accommodating and supporting a plurality of module assemblies sequentially stacked on the module assembly and the supporting member, wherein the supporting member comprises at least one of cast iron, stone, lead, and concrete to fix a weight plate fixed inside the enclosure. It is possible to provide a medium-large battery pack of an industrial electric vehicle provided with a weight body including.

Therefore, when the lithium secondary battery is applied to an industrial electric vehicle, the present invention does not have to provide a separate weight body, thereby reducing manufacturing costs and increasing the space utilization of the industrial electric vehicle.

1 is a perspective view showing a medium-large battery pack of an industrial electric vehicle equipped with a weight body according to the present invention.
2 is a side view.
3 is a perspective view of the bus bar and the protective cap.
4 is a perspective view showing the cap fixing means.
5 is a perspective view showing a protective cap.
6 is a perspective view illustrating the support member.
7 is a plan view of the supporting member from which the fixing bar and the upper block are removed.
8 is a view illustrating an assembly process of the support member.
9 is a view showing a state in which the weight reinforcement member of the present invention is fastened.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may properly define the concept of terms in order to best describe the user's invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Throughout the specification, when a part is said to "include" a certain component, it means that it may further include other components, except to exclude other components unless otherwise stated.

Hereinafter, a preferred embodiment of a medium-large battery pack of an industrial electric vehicle equipped with a weight body according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a medium-large battery pack of an industrial electric vehicle equipped with a weight according to the present invention, Figure 2 is a side view. 2 is a view that does not include the iron box 100.

1 and 2, the present invention provides a steel box 100, a plurality of battery modules 410, and a plurality of module cases 430 and busbars 440 accommodating the battery modules 410. It comprises a module assembly (400, 400 '), a support member 200 for receiving and supporting the module assembly (400, 400'), and a substrate 500 for supporting the electrical component 300.

The iron box 100 may be formed of a metal material, and insertion holes 110 formed on both sides thereof may be inserted into the movable jig.

The module assemblies 400 and 400 ′ comprise a plurality of battery modules 410, and are configured to be spaced apart from each other but maintain electrical connection through the bus bars 440. That is, the module assemblies 400 and 400 ′ are divided into a first module group 400 and a second module group 400 ′ spaced apart from each other, as shown.

Here, the first module group 400 and the second module group 400 ′ are electrically energized by the bus bar 440.

In addition, the battery modules 410 belonging to each of the groups 400 and 400 ′ are provided with positive and negative power terminals 411 (see FIG. 4), and a pair of bus bars 440 are provided. As each battery module 410 is fastened and connected to a positive (+) or a negative (-) power terminal 411, the entire battery modules 410 are connected as a series or parallel structure. In addition, each battery module 410 is accommodated inside the module case 430.

The module case 430 accommodates the battery module 410 inside, but the positive and negative power terminals 411 located on both sides of one surface of the battery module 410 may be easily exposed to the outside. It is desirable to open so that both sides can be exposed from the front and rear. In addition, it is preferable that the module case 430 forms an outlet (not shown) so that a power line or a cable (not shown) drawn out from the battery module 410 can be drawn out.

The bus bar 440 transmits positive (+) and negative (-) power, and the electric component 300 installed in the first module group 400, the second module group 400 ′, and the substrate 500 ( For example, a power connector).

In addition, the module assembly (400, 400 ') is a protective cap 420 and the cap fixing means to prevent the contact of foreign matter to the coupling portion between the bus bar 440 and the power supply terminal 411 of the battery module 410 450 may be further included. This will be described with reference to FIGS. 3 to 5.

Figure 3 is a perspective view showing a bus bar and a protective cap, Figure 4 is a perspective view showing a cap fixing means, Figure 5 is a perspective view showing a protective cap.

3 to 5, the module assemblies 400 and 400 ′ further include a bus bar 440, a protective cap 420, and a cap fixing means 450.

The busbar 440 extends vertically from one surface of the module assembly 400, 400 ′ and is connected to either the positive or negative power terminal 411 of the battery module 410. . To this end, the bus bar 440 includes a terminal hole 441 formed therethrough so that the power supply terminal 411 can be fitted thereto.

The protective cap 420 has an empty space therein, forms a wall surface 423, an upper surface 421, and a lower surface thereof, and one surface of the battery module 410 is opened. In addition, the protective cap 420 is formed with a cutting groove 422 and the opening 425 for guiding the bus bar 440, the locking ring 424 is formed to be caught by the cap fixing means 450.

The cutting groove 422 is cut off from the upper surface 421 of the protective cap 420 to guide the bus bar 440. The opening 425 is formed at the bottom surface.

The locking protrusion 424 is formed in a projection shape on the inner surface of the wall surface of the protective cap 420 is fastened to the cap fixing means 450.

The cap fixing means 450 is formed on both sides with the power terminal 411 formed on one surface (eg, the front surface) of the battery module 410 interposed therebetween. The cap fixing means 450 is spaced apart from the first protrusion 451 upright from one surface of the battery module 410 and a lower height than the first protrusion 451 to form a space in which the locking protrusion 424 is fitted. The second protrusion 452 is provided.

The first protrusion 451 protrudes from one surface of the battery module to form a cross section extending and protruding in the longitudinal direction. The first protrusion 451 also serves to guide the locking protrusion 424 inserted from the upper side. In addition, the first protrusion 451 is the second protrusion 452 is spaced apart from each other to form a fitting groove 453 is fitted with the engaging projection 424.

That is, the locking protrusion 424 is first guided through the first protrusion and inserted into the fitting groove 453 formed as a space spaced between the second protrusion from the lower side of the first protrusion 451.

The electronic component 300 collectively refers to components for driving a battery pack including a temperature, voltage and current sensor, a power connector, a BMS, a capacitor, and a lithium secondary battery, and are not limited thereto. Such electrical component 300 is generally omitted according to the application of known techniques.

The substrate 500 is fixed to the upper surface of the support member 200 to support the electric component 300. For example, the substrate 500 is fixed to an upper surface of the second module group 400 ′ to support the electronic component 300.

The support member 200 supports the module assemblies 400 and 400 ′ inside the iron box 100. That is, the support member 200 includes a first support member 200 supporting the first module group 400 and a second support member 200 'supporting the second module group 400'.

The first support member 200 and the second support member 200 ′ include the same components. However, the height may be differential according to the number of battery modules 410 stacked inside, and the substrate 500 may be selectively installed on the upper side.

The support member 200 supports the module assemblies 400 and 400 'in which the battery module and the module case are sequentially stacked, and includes a weight body to implement weight balancing of the industrial electric vehicle.

The detailed configuration of such a supporting member 200 will be described by taking a first supporting member (collectively referred to as a supporting member) as an example.

6 is a perspective view illustrating the support member 200, and FIG. 7 is a plan view of the support member 200 from which the fixing bar 220 and the upper block 210 are removed.

6 and 7, the support member 200 of the present invention includes an upper block 210, a fixing bar 220, a weight plate 230, a guide bar 240, and a vertical bar 250. ), A connection bar 260, a partition bar 270, and a lower block 280.

Support member 200 having such a configuration is the front and rear openings, the connecting bar 260 and the partition bar 270 extending in the transverse direction to the vertical guide bar 240 and the vertical bar 250 on both sides. It forms an upright wall surface by), and forms an upper surface by the upper block 210 extending horizontally from the upper side of both wall surfaces. Specifically, it is as follows.

The upper block 210 is a plate extending in the horizontal direction to form a horizontal plane is fixed to the upper end of the weight plate 230 and the guide bar 240 and the vertical bar 250 to form the upper surface of the support member 200.

The fixing bar 220 extends in the longitudinal direction and is formed with an insertion groove 221 into which any one of both sides of the upper block 210 is inserted. In addition, the fixing bar 220 may be formed with a coupling hole 222 through which the weight plate 230, the vertical bar 250 and the guide bar 240 and a screw or the like can communicate.

Here, the fixing bar 220, the upper block 210, the lower block 280, the guide bar 240, the connecting bar 260, partition bar 270, the weight plate 230 is the upper coupling hole 222 By providing a plurality of fixing fixtures such as screws can be inserted and fixed. Hereinafter, description of the coupling holes 222 formed in the respective components will be omitted.

The lower block 280 extends laterally to form the bottom surface of the inner space in which the module assemblies 400 and 400 ′ are sequentially stacked. For example, the lower block 280 may be manufactured in a quadrangular shape having shorter distances on both sides and longer front and rear sides.

The weight plate 230 is formed as an upright plate shape, is made of cast iron, lead, concrete, wood or stone is installed for weight balancing of the battery pack. Here, the weight plate 230 is shown as being installed on each side of each of the support member 200, as shown, but is not limited to this, it is possible to meet the weight balancing required weight according to the working load of the target industrial electric vehicle Can be added. For example, in the case of a forklift, the number and weight of the weight plate 230 may be adjusted so that the weight of the entire battery pack exceeds 2 tons.

In other words, the weight plate 230 is a pair of spaced apart to form the upright both sides of the support member 200.

In addition, the weight plate 230 may further include a plurality of through holes 231 to dissipate heat generated from the battery module 410 accommodated therein. The through hole 231 is formed through the wall surface of the weight plate 230.

The guide bar 240 is bent in a 'b' shape to have a shape consistent with each edge of the lower block 280. Here, the guide bar 240 is one surface is in close contact with the weight plate 230, the opposite surface is fastened to the vertical bar (250). In addition, if the lower block 280 is formed as a quadrangle having four sides as shown, for example, four guide bars 240 are fixed to stand up at each side edge.

Here, the weight plate 230 and the guide bar may be fixed on the bottom surface and the side of the enclosure 100. That is, the weight plate 230 and the guide bar are fixed inside the enclosure 100, and then fastened to slide through the guide bar in a state in which the vertical bar, the connection bar, and the lower block are assembled.

The vertical bar 250 is in close contact with the bent inner surface of the guide bar 240 is fixed upright. In this case, four vertical bars 250 are formed in each corner of the lower block 280.

The connection bar 260 extends laterally between the vertical bars 250 to interconnect and fix the vertical bars 250. That is, the connecting bar 260 is fixed to be spaced apart in the vertical direction between the plurality of guide bars 240 as a plurality. At this time, the distance between the connection bar 260 is preferably a distance that can accommodate the height of the module assembly (400, 400 ').

The partition bar 270 is in close contact with one surface of the vertical bar 250 and the connection bar 260 and extends in the horizontal direction. Here, the partition bar 270 is bent as an inverted '-' shape. That is, the partition bar 270 is an upright vertical surface is in close contact with the vertical bar 250 and the connection bar 260, the horizontal surface extending horizontally from the top of the vertical surface to support the lower end of the module assembly (400, 400 '). .

As described above, the vertical bar, the connecting bar and the lower block are fastened while sliding from the upper side to the lower side along the bent surface of the guide bar 240 in the assembled state, as shown in FIG. That is, according to the present invention, since it is difficult for an operator to manually move and assemble due to the weight of the weight plate 230, the vertical bar, the connecting bar, and the lower block are fixed after the inside of the enclosure 100 using heavy equipment such as a hoist. Separately assembled and fastened.

In addition, the support member 200 may change the material to implement the weight balancing in addition to the weight plate 230 of the above-described configuration. For example, the upper block 210 and the lower block 280 may be selected from any one of concrete, stone, cast iron, and lead so as to implement weight balancing, such as the weight plate 230 described above.

In addition, the present invention is capable of selectively adding weight in addition to the weight plate 230, for this purpose may further include a weight reinforcement member 600. This will be described with reference to FIG. 9.

9 is a view showing a state in which the weight reinforcement member 600 of the present invention is fastened.

Referring to Figure 9, the weight reinforcement member 600 of the present invention is characterized in that the removable in any configuration in the above-described embodiment to reinforce the weight. To describe a specific configuration, the weight reinforcement member 600 is fixed to the upper end of the plurality of vertical reinforcement bar 610 is fixed in close contact with the side end surface of the guide bar 240, both vertical reinforcement bar 610 The horizontal reinforcement bar 620 and the upper reinforcement block 630 fixed to the upper end of the horizontal reinforcement bar 620.

In addition, the vertical reinforcement bar 610 is manufactured in an upright shape and fixed to the outer surface of the guide bar 240. The fixed manner generally omits the description as it applies known techniques. However, to explain an example, it is also possible to form a through-hole communicating with the guide bar 240 and the vertical reinforcement bar 610, respectively, and may be fixed using a fixing jig such as a bolt in the through-hole.

Here, the vertical reinforcement bar 610 is described as an example of the bar, as a total of four can be installed as each of the four guide bar 240 is fixed.

The horizontal reinforcement bar 620 is extended in the transverse direction so that it can be fixed at the top of both vertical reinforcement bar 610. That is, the horizontal reinforcement bar 620 may be, for example, two vertical reinforcement bars 610 spaced from one side of the four vertical reinforcement bars 610 and two vertical reinforcement bars 610 spaced from the other side. Are fixed to each.

In addition, the horizontal reinforcement bar 620 may be fixed by a fixing jig that is formed with a plurality of through-holes communicate with the vertical reinforcement bar 610. In this case, the vertical reinforcement bar 610 may be fastened to the horizontal reinforcement bar 620 without forming a separate coupling relationship with the guide bar 240 as described above.

The upper reinforcement block 630 is installed on the upper side of the upper block 210 in the form of a plate is fixed on the upper surface of the horizontal reinforcement bar 620 extending in the transverse direction on each side. At this time, the upper reinforcement block 630 is formed by a plurality of through holes are formed by a fixed jig communicating with the horizontal reinforcement bar (620). Here, the plurality of upper reinforcement blocks 630 may be stacked.

As described above, the upper block 210 may be fixed by the fixing bar 220, and the fixing jig communicating the horizontal reinforcing bar 620 and the upper reinforcing block 630 instead of the fixing bar 220. It is also possible to be fixed by.

That is, the upper block 210 may be fastened and fixed to an insertion groove formed in the fixing bar 220 in the above-described embodiment, and the horizontal reinforcing bar 620 extending laterally from the upper side without the fixing bar 220. It may be fixed by a fixing jig communicating with or a fixing jig communicating with the horizontal reinforcing bar 620 and the upper reinforcing block 630.

The vertical reinforcement bar 610, horizontal reinforcement bar 620 and the upper reinforcement block 630 as described above can be made of any one of concrete, stone, cast iron, lead, the operator to the target weight (for example, 2 tons) You can optionally add them.

For example, the operator measures the weight by installing a vertical reinforcement bar 610 when the target weight is not reached after the support member is installed, and when the target weight is not reached, the horizontal reinforcement bar 620 and / or One or more upper reinforcement blocks 630 may be selected and added.

The present invention includes the configuration as described above, the following describes the operation and effect of the present invention achieved by the configuration as described above.

First, the operator assembles the support members 200 to stack the module assemblies 400 and 400 ′, and then installs the substrate 500 and the electric component 300, and then connects the bus bars 440 to the entire battery module. 410 are assembled to have electrical connections in series or in parallel. And the worker receives the assembled components in the iron box 100, the cover is closed to seal the iron box 100.

Here, the support member 200 is a guide bar 240 and the weight plate 230 is fixed to the inner surface and / or bottom surface of the housing 100, respectively. In this case, the guide bars 240 are fixed to be spaced apart from each other as a total of four, the weight plate 230 is a pair of the outer and the housing 100 of the pair of guide bars 240 spaced apart from each other on one side and the other, respectively It is fixed between the inner side of the.

Thereafter, the vertical bar, the connecting bar and the lower block 280 are assembled outside the housing 100 and then transferred by a hoist or other heavy equipment so that one surface of the vertical bar is in close contact with the bent surface of the guide bar 240. Slid downward in the housing 100 is received.

Here, the connection bar 260 is connected between the vertical bar 250 of both sides is connected between the two vertical bars 250 installed on one side of the lower block 280 to increase the strength of both vertical bars 250 Reinforce and support.

In addition, the partition bar 270 is fixed to one surface of the connection bar 260 and one surface of the vertical bar 250 in close contact with each other. The partition bar 270 is spaced apart and fixed in the vertical direction, and partitions an inner space of the support member 200. The module assemblies 400 and 400 ′ are stacked in spaces partitioned by the partition bar 270 in which one battery module 410 is accommodated in one module case 430. Here, the module assemblies 400 and 400 ′ respectively stacked on the upper and lower sides may be stacked so as to be spaced up and down according to height adjustment between the partition bars 270.

In addition, the upper block 210 is fixed to be placed on the top of the guide bar 240 and the vertical bar 250, the fixing bar 220 so that both sides of the upper block 210 is accommodated in the insertion groove 221, respectively. Installed and fixed.

If it is necessary to further reinforce the weight after the support member 200 is assembled in this manner, the worker may further assemble the weight reinforcement member 600.

That is, the worker is fixed to each of the vertical reinforcing bar 610 to be in close contact with the bent outer surface (one surface bent from one side in close contact with the weight plate 230) of each guide bar 240, and then according to the target weight Optionally add a horizontal reinforcement bar 620 and an upper reinforcement block 630.

Here, one or more upper reinforcement blocks 630 may be selectively stacked depending on whether the target weight is reached. Therefore, in the present invention, the weight of the lithium secondary battery battery pack can be made to have a weight of 2 tons or more.

For example, when an industrial electric vehicle (for example, a forklift) lifts and lowers an article through a fork lift, the forward load and the rear weight may fall forward unless a balanced balance is achieved. However, in the related art, since a lithium secondary battery has a smaller weight than a conventional lead acid battery, a separate weight is added to implement such weight balancing.

However, in the present invention, the weight and weight reinforcement member 600 may be selectively added as a plate shape upright to the support member 200, so as to have a target weight according to the use purpose of the industrial electric vehicle. A battery pack of an industrial electric vehicle using a lithium secondary battery applicable to an industrial electric vehicle can be provided.

That is, the present invention can reduce the manufacturing cost and increase the space utilization according to the conventional weight so as not to provide a separate weight.

While the invention has been described in detail with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

100: enclosure 200: support member
210: upper block 220: fixed bar
221: insertion groove 222: coupling hole
230: weight plate 231: through hole
240: guide bar 250: vertical bar
260: connection bar 270: partition bar
280: lower block 300: electrical components
400, 400 ': module assembly 410: battery module
411: power supply terminal 420: protective cap
430: module case 440: busbar
441: terminal hole 450: cap fixing means
451: first projection 452: second projection
453: groove 500: substrate
600: weight reinforcement member 610: vertical reinforcement bar
620: horizontal reinforcement bar 630: upper reinforcement block

Claims (6)

Enclosure 100;
A plurality of battery modules 410 that are charged with electrical energy, a plurality of module cases 430 that accommodate the battery modules 410, and a plurality of battery modules 410 that are respectively electrically connected to the positive and negative power sources. A module assembly having a bus bar 440; And
And a support member 200 for receiving and supporting a plurality of module assemblies 400 and 400 'sequentially stacked on the enclosure 100.
Support member 200 is
It comprises a weight plate 230 made of at least one of stone or concrete fixed to the inside of the housing 100,
The module assemblies 400, 400 '
A protective cap 420 and a cap fixing means 450 for fixing the protective cap to prevent the contact of foreign matters in the coupling portion between the bus bar 440 and the power supply terminal 411 of the battery module 410. and,
Protective cap 420 is
An upper surface 421, a wall surface 423 extending downward from the upper surface 421, and one surface of the battery module 410 is opened, a cutaway groove 422 cut away from the upper surface 421 to guide the bus bar, and a wall surface. Included in the projection 423 is a projection 424 is caught in the cap fixing means 450; includes,
Cap fixing means 450 is
A first protrusion 451 upright on one surface of the battery module 410 to form a space into which the locking protrusion 424 is fitted, a second protrusion 452 spaced apart from the first protrusion 451 at a lower height, and A fitting groove 453 in which the locking protrusion 424 is inserted between the first protrusion 451 and the second protrusion 452; Medium and large battery pack of an industrial electric vehicle provided with a weight comprising a.
The method of claim 1, wherein the support member 200
A lower block 280 forming a bottom surface;
A plurality of guide bars 240 erected at the corners of the lower block 280;
A plurality of vertical bars 250 fixed to one surface of the guide bar 240 and erected at each corner of the lower block 280; And
A plurality of connection bars 260 fixed at both ends of the vertical bars 250 positioned at both sides thereof;
A partition bar 270 fixed at one surface of the vertical bar 250 and the connection bar 260 to partition an internal space of the support member 200; And
And an upper block 210 fixed to the top of the guide bar 240 and the vertical bar 250 to form an upper surface of the support member 200.
The weight plate 230 is a medium-large battery pack of an industrial electric vehicle having a weight body, characterized in that the vertical bar 250 and the guide bar 240 is fixed close to the outer surface.
The weight plate 230 of claim 1 or 2,
Medium-large battery pack of an industrial electric vehicle provided with a weight further comprising at least one or more through-holes (231).
The method of claim 2, wherein at least one of the upper block 210 and the lower block 280 is
Medium-large battery pack of an industrial electric vehicle equipped with a weight body, characterized in that the weight body made of stone or concrete.
The method of claim 2, wherein the support member 200
Further comprising a fixing bar 220 having an insertion groove 221 raised to accommodate both sides of the upper block 210 in the lower surface is fixed to at least one of the guide bar 240 and the vertical bar 250. Medium and large battery pack of an industrial electric vehicle equipped with a weight body.
The method according to claim 1 or 2,
It further comprises a weight reinforcement member is made of at least one of cast iron, stone, lead, concrete and selectively added to at least one of the side and top of the support member according to the target weight of the battery pack,
The weight reinforcement member
Upright plural vertical reinforcement bars;
At least one horizontal reinforcing bar extending and fixed in a transverse direction above the vertical reinforcing bars on both sides spaced apart from each other; And
An upper reinforcement block is fixed at the top of the pair of horizontal reinforcement bar spaced apart from each other; Medium and large battery pack of an industrial electric vehicle provided with a weight having at least one or more.

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