KR20090000297A - Device having plate-typed reinforcement member - Google Patents

Abstract

A device having a structure in which a plurality of units are mounted in a base plate is provided to improve the mechanical rigidity and to minimize the weight. A device having a structure in which a plurality of units are mounted in a base plate(120). The base plate is bended with a structure one or more unevenness sections to enhance the structural stability about the load of the units. The reinforcing member ('I type reinforcing member',150) is combined in the width direction of the base plate, at the lower-part of the base plate and minimizes the deformation of the winding structure due to the unit load. The units are a unit cell capable of charging/discharging and a battery module containing the same. The device is a medium-to large-sized battery pack(100).

Description

Device having plate type reinforcement member {Device Having Plate-typed Reinforcement Member}

1 is a schematic diagram of a structure of a medium-large battery pack according to an embodiment of the present invention;

Figure 2 is a schematic diagram of a medium-large battery pack showing a structure excluding the housing in the structure of Figure 1;

3 and 4 are enlarged schematic views of the side support member in Figure 2;

5 and 6 are front and rear schematic views showing the coupling relationship between the side support member and the Y-shaped reinforcing member in a state in which the connecting member is excluded.

The present invention relates to an apparatus including a reinforcing member, and more particularly, a device having a structure in which a plurality of units are mounted on a base plate, wherein the base plate is provided at least one position to increase structural stability with respect to the load of the units. It is bent in a structure including an uneven portion, the lower surface of the base plate is coupled to the reinforcing member of the I-type structure in the width direction of the base plate structure to minimize the deformation caused by the unit load and the apparatus including the same to provide.

Recently, secondary batteries capable of charging and discharging have been widely used as energy sources of wireless mobile devices. Secondary batteries are also attracting attention as a power source for electric vehicles (EVs) and hybrid electric vehicles (HEVs), which are proposed as a way to solve air pollution in conventional gasoline and diesel vehicles that use fossil fuels. .

Small or mobile devices use one or two or four battery cells per device, whereas medium and large devices such as automobiles are used in medium and large battery packs electrically connected to a plurality of battery cells due to the necessity of high output capacity.

Since medium and large battery packs are preferably manufactured in as small a size and weight as possible, square batteries, pouch-type batteries, etc., which can be charged with high integration and have a small weight to capacity, are mainly used as battery cells of medium and large battery packs. In particular, a pouch-type battery using an aluminum laminate sheet or the like as an exterior member has attracted much attention in recent years due to its advantages such as low weight, low manufacturing cost, and easy deformation.

In order for a medium-large battery pack to provide the output and capacity required by a given device or device, a plurality of battery cells must be electrically connected in series and be able to maintain a stable structure against external force.

In general, a medium-large battery pack has a structure in which a plurality of units such as a secondary battery or a battery cell or a battery module incorporating a secondary battery is vertically stacked and stacked. For example, a base plate in which the units are vertically stacked and stacked, A pair of side support members that are in close contact with the outer surfaces of the outermost units and a connection member for connecting and fixing the side support members to each other are formed on the base plate. It consists of including the housing which is fixed.

In the structure of such a medium-large battery pack, the conventional base plate secured structural stability against external force or vibration by using a structure in which two metal plates made of a curved structure are overlapped in a predetermined form for strength reinforcement. However, the method of configuring the base plate by overlapping two sheets has various problems, such as increasing the weight and increasing the cost for the metal sheet.

In addition, in the case of constructing a medium-to-large battery pack using a plurality of battery cells, a process of assembling these members is very complicated because many members are generally required for their mechanical fastening and electrical connection. Moreover, space is required for joining, welding, soldering, etc. a plurality of members for mechanical fastening and electrical connection, thereby increasing the size of the entire system. This increase in size is undesirable in view of the space limitations of the apparatus or device in which the medium / large battery pack is mounted. Furthermore, in order to be efficiently mounted in a limited interior space such as a vehicle, a medium-large battery pack having a more compact structure is required.

Such a device having further reduced weight and compact structure is, in many cases, a device desired not only in a medium-large battery pack but also in various fields.

Therefore, as described above, the compactness and the weight can be minimized, the structural stability is excellent, and there is a high necessity of a technology for a device having a structure in which a plurality of units are mounted on a base plate.

The present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

It is an object of the present invention to provide a device having a structure capable of minimizing weight and improving its mechanical rigidity in a device having a plurality of units mounted on a base plate.

It is still another object of the present invention to maintain a stable stack structure of a unit module having two or more secondary batteries, or a medium, large battery pack having more compact, lower weight, and excellent structural stability against external force. To provide.

An apparatus according to the present invention for achieving the above object is a device having a structure in which a plurality of units are mounted on a base plate, the base plate includes at least one uneven portion to increase the structural stability with respect to the load of the units It is curved in structure, the reinforcing member ('I type reinforcing member') of the I-type structure is coupled to the lower surface of the base plate in the width direction of the base plate to minimize the deformation of the bending structure due to the unit load It consists of a structure.

In the apparatus of the present invention, the bent structure formed on the base plate improves the mechanical rigidity of the base plate against external forces, and the reinforcing member of the I-type structure mounted on the lower surface of the base plate is caused to bend the base plate due to the load of the unit. This prevents the structure from deforming. Moreover, the type I reinforcing member can be significantly reduced in overall weight while maintaining the mechanical rigidity corresponding to the plate overlapping structure of the prior art as described above, and thus is particularly useful in devices where a weight minimizing structure is desired. Do.

Such an I type reinforcing member may be variously applied without particular limitation as long as it is a device having a structure in which a plurality of units are mounted on a base plate of a curved structure.

As one preferred embodiment, the unit is a unit cell capable of charging or discharging or a battery module including the same, and the device may be a medium-large battery pack. As described above, the medium and large battery packs used in electric vehicles, hybrid electric vehicles, etc. are preferable as the weight is smaller in terms of vehicle fuel efficiency, and thus, the apparatus according to the present invention may be suitably applied.

Preferably, the base plate is made of one plate, and the I-shaped reinforcing member may have a structure in which at least both ends thereof are coupled to the plate of the base plate. In some cases, the reinforcing member is coupled to the plate of the base plate as a whole, as well as both ends, it is possible to further increase the adhesion between each other.

At this time, the coupling of the reinforcing member and the base plate plate is not particularly limited as long as it is a method capable of solidifying the mutual coupling force, for example, can be coupled to each other using a fixing pin, a female screw / male screw fastening method and the like. For example, a fastening groove is drilled in a portion of the reinforcing member and the base plate in contact with the reinforcing member, and a female screw and a male screw or a fixing pin are inserted into the fastening groove to fasten the plate of the I type reinforcing member and the base plate to each other. can do.

The I type reinforcing member has a planar shape corresponding to the lower surface of the base plate, so that the I type reinforcing member can be more tightly adhered to the base plate. The corresponding planar structure is a concept that includes not only a shape that completely matches the bottom surface of the base plate, but also a shape approximately corresponding to the bottom surface of the base plate. That is, the I type reinforcing member may not be completely matched to the bending structure of the base plate, but may be formed in a partially curved structure in a shape corresponding substantially thereto.

Since the type I reinforcing member is used to provide high mechanical rigidity while being used in a minimum unit, for example, the type I reinforcing member may be mounted on the lower surface of the base plate in a number of regular intervals. By this arrangement and mounting structure, the load of the units can be evenly distributed on the base plate to prevent deformation of the flexure structure.

In general, a medium or large battery pack may have various forms in which units such as a battery cell or a battery module in which a secondary battery or a secondary battery is embedded may be mounted. For example, a plurality of units may be stacked vertically and stacked. have. As a preferable example of such a medium-large battery pack, a base plate of vertically stacked units are stacked, a pair of side support members in close contact with the outer surface of the outermost unit with the bottom fixed to the base plate, and the side support member A connection member is formed to connect and fix the upper end, and may include a housing fixed to the base plate as a structure surrounding the units.

In the medium-large battery pack structure as described above, the side support member simultaneously serves to maintain the units in an upright stacked structure, and to fix the base plates on the base plate. Therefore, when an external force such as an impact is applied to the medium / large battery pack, the side support member having a plate-like structure as a whole may be vulnerable to the external force, and there is a possibility that its engagement portion or the like is broken.

In view of this, preferably, each end is coupled to the base plate and the connecting member so as to reinforce the mechanical rigidity of the side support member while more effectively supplementing the coupling state of the base plate, the connecting member and the side support member. The Y-type reinforcement member ('Y-type reinforcement member) is made of a structure that is further included.

This Y type reinforcement member, like the I type reinforcement member mounted on the base plate, provides high structural stability while minimizing the weight increase of the device. In addition, by joining the three ends to the corresponding sites, the desired mutual fastening structure can be achieved while minimizing the number of fastenings.

Preferably, the upper both ends of the Y-shaped reinforcing member is simultaneously coupled to the connecting member and the side support member, the lower end may be made of a structure that is coupled through the base plate. Therefore, it is possible to simplify the coupling process for the connecting member and the side support member and to provide a more secure coupling state.

The connecting member may be simply a structure that interconnects the side support members, but preferably, may be configured to be coupled to the side support members in a shape that presses the upper edges of both sides of the close contact unit. The connecting member of the mounting structure serves to maintain the upright stacking state of the units by the side support member, and to prevent the units from being separated from their respective positions, and to induce the movement of the refrigerant, as described later. The role of the refrigerant passage may also be parallel.

In this regard, the medium-large battery pack needs to have a structure in which a coolant flow path for circulating the coolant is formed in order to prevent a temperature rise due to continuous charge / discharge and malfunction. Such a cooling structure, for example, the refrigerant inlet is formed on one side of the upper or lower end of the housing, the refrigerant outlet is formed on the opposite side, the refrigerant flowing into the refrigerant inlet passes through each unit to the refrigerant outlet It may be made of a structure that is discharged to. Here, the opposite side where the refrigerant outlet is located may be an upper side or a lower side in the same direction as the direction in which the refrigerant inlet is located, and an upper side or a lower side in the opposite direction to the direction in which the refrigerant inlet is located.

In one preferred embodiment, the outer surface of the device is additionally equipped with a sealing housing, the connecting member may be a structure that is in close contact with the inner surface of the housing while pressing the upper edges of the upper sides of the units. By the mounting structure of the connection member as described above, the flow path of the refrigerant may be formed so that the refrigerant flowing into the refrigerant inlet of the housing does not discharge to both sides of the unit stack, but vertically penetrates between the units. That is, this structure can reduce the loss of the refrigerant in the medium-large battery pack, thereby providing a more efficient cooling structure.

The connection member is not particularly limited as long as it is easy to press the upper end of the unit and is coupled to the side support member, but is preferably formed in a '-' shaped frame in the vertical cross-section, thereby increasing the weight of the entire battery pack It can provide high mechanical rigidity while minimizing.

The device according to the present invention is preferably used as a power source for electric vehicles, hybrid electric vehicles, electric motorcycles, electric bicycles, etc., which have a limited mounting space and are exposed to frequent vibrations and strong shocks, considering the mounting efficiency, structural stability, and the like as described above. However, the scope of application is not limited thereto.

Hereinafter, although described with reference to the drawings according to an embodiment of the present invention, this is for easier understanding of the present invention, the scope of the present invention is not limited thereto.

1 is a schematic diagram of a medium-large battery pack structure according to an embodiment of the present invention, Figure 2 is a schematic diagram of a medium-large battery pack showing a structure excluding the housing in the structure of FIG.

Referring to these drawings, the medium-large battery pack 100 includes a plurality of battery modules 110 as a unit, a base plate 120 on which the battery modules 110 are mounted, a pair of side support members 130, and a connection. It consists of the member 140 and the housing 170.

The battery modules 110 are stacked in the longitudinal direction L of the battery pack in an upright state on the base plate 120, and the side support members 130 are outer surfaces of the outermost battery modules 112 and 114. It is coupled to the base plate 120 in close contact with the.

The side support member 130 is positioned so that the lower extension 135 protruding from its end is brought into contact with the mounting portion 122 of the base plate 120 and has a rectangular fastening formed in the base plate 120. It is coupled to each other by a circular fastening groove 136, a female screw, and a male screw formed in the lower groove 135 of the dragon groove (not shown) and the side support member 130.

The two connection members 140 mounted on both sides of the upper surface of the battery module 110 in the stacking direction may press side edges of the upper sides of the battery modules 110 which are in close contact with each other. It is coupled with the upper end of each.

The housing 170 is fastened in a state in which an extension (not shown) of the housing 170 is positioned on the extension 125 of the base plate 120 so as to cover the outer surfaces of the battery modules 110. The base plate 120 is coupled to the female screw / male screw to the dragon groove 126.

The lower surface of the base plate 120 is bent in a structure in which a plurality of concavities and convexities 128 are formed in order to improve structural stability against external force and load, and a plurality of I type reinforcing members of I type structure on its plane. The 150 is coupled while having a predetermined distance D in the width direction W of the base plate 120. Therefore, the I type reinforcement members 150 additionally coupled to the bottom surface of the base plate 120 further improve the mechanical rigidity of the base plate 120 and have a curved structure due to the load of the battery modules 110. Prevents deformation.

3 and 4 are schematic views showing enlarged side support member portions in FIG. 2, and FIGS. 5 and 6 show front and rear views showing a coupling relationship between the side support member and the Y-shaped reinforcement member in a limited state of the connection member. Schematics are shown.

First, referring to FIGS. 3 to 5 together with FIG. 2, the Y-shaped reinforcing member 160 located on the outer surface of the side support member 130 may have a base on which the I-shaped reinforcing member 150 is mounted on the bottom surface thereof. Fastening grooves 162 are formed at both upper ends of the plate 120, the connecting member 140, and the side support members 130, and the lower end of the base plate 120 is formed. Consists of a structure that penetrates the central part.

Thus, the Y-shaped reinforcing member 160 complements the structural stability of the side support member 130, further solidifies the coupling portion of the connection member 140 and the side support member 130, the connection member 140 and the base The plate 140 helps to maintain mutual coupling. As a result, the medium-large battery pack by the Y-shaped reinforcing member 160 can maintain more stable structural stability and fastening force against external forces.

Next, referring to FIG. 6, the connection member 140 has a lower surface thereof pressed against the upper edges of the battery modules 110 to pressurize it, and at the same time, the upper surface thereof is brought into close contact with the housing 170 of the battery pack. have. Therefore, by this structure, the refrigerant may be induced to penetrate vertically between the battery modules 110 without escaping to both sides of the battery module 110 stack.

The connecting member 140 is configured in a 'c' shaped frame on a vertical cross-section to minimize weight increase while maintaining the desired mechanical rigidity. In addition, both ends thereof are perforated with fasteners 142 for engaging with the side support member 130 and the Y-shaped reinforcement member 160 so that they are integrally fastened to each other. Therefore, despite the addition of the Y-shaped reinforcing member 160, the assembly process for fastening does not increase specially, the assembly process of the medium-large battery pack is simple.

Although described with reference to the drawings according to an embodiment of the present invention, those of ordinary skill in the art will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

As described above, the apparatus according to the present invention is a device having a structure in which a plurality of units are mounted on the base plate, the reinforcing member of the I-type structure is mounted on the lower surface of the base plate, so that the conventional base plate to overlap two sheets Compared to the base plate structure, the weight can be greatly reduced, and the mechanical strength equivalent thereto can be exhibited.

Therefore, by using the structure of the base plate is equipped with such a reinforcing member it is possible to manufacture a device such as a medium and large battery pack more compact and structural stability is greatly improved.

Claims (12)

A device having a structure in which a plurality of units are mounted on a base plate, wherein the base plate is bent in a structure including one or more uneven portions so as to increase structural stability with respect to the load of the units. Reinforcement member ('I-type reinforcing member') of the I-type structure on the plane is coupled in the width direction of the base plate to minimize the deformation of the bending structure due to the unit load. The apparatus of claim 1, wherein the units are chargeable and dischargeable unit cells or a battery module including the same, and the apparatus is a medium-large battery pack. The apparatus of claim 1, wherein the base plate is made of a single plate, and the I-shaped reinforcing member has at least both ends thereof coupled to the plate of the base plate. 4. The apparatus of claim 3, wherein the type I reinforcement member and the plate of the base plate are joined by a fixing pin and / or a female screw / male screw fastener. The apparatus of claim 3, wherein the I-shaped reinforcing member has a planar shape corresponding to the lower surface of the base plate. 4. The apparatus of claim 3, wherein the type I reinforcing member is mounted on the lower surface of the base plate at predetermined regular intervals in number of two or more. The medium and large battery pack according to claim 1, wherein the plurality of units are mounted in close contact with each other in the lateral direction, and the side support members are mounted on both sides, and the support members are coupled to each other by a predetermined connection member. And a reinforcing member of a Y-type structure ('Y-type reinforcing member'), each end of which is coupled to the base plate and the connecting member, so as to reinforce the coupling state of the base plate, the connecting member and the side support member. Device characterized in that. 8. The apparatus of claim 7, wherein the upper ends of the Y-shaped reinforcement member are simultaneously coupled to the connecting member and the side support member, and the lower end is coupled through the base plate. The apparatus of claim 7, wherein the connection members are coupled to the side support members in a shape of pressing the upper edges of the upper ends of the units in close contact with each other. The apparatus of claim 9, wherein a sealing housing is further mounted on an outer surface of the apparatus, and the connection member is in close contact with the inner surface of the housing while pressing the upper edges of the upper parts of the units to form a flow path of the refrigerant. The apparatus of claim 7, wherein the connecting member is a frame having a 'c' shape in a vertical cross section. An electric vehicle or hybrid electric vehicle comprising the apparatus according to any one of claims 1 to 11.

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