KR102069511B1 - Battery pack module and battery pack with strong bonding force - Google Patents

Abstract

The present invention relates to a battery pack module and a battery pack having strong coupling force. The battery pack module according to an embodiment of the present invention comprises: a plurality of battery cells having a cylindrical shape; two battery holders in which a plurality of body insertion parts, to which a part of an upper part or a part of a lower part of a cylindrical body of the battery cells is inserted, are formed in a matrix form, wherein a flow path hole or a coupling hole is provided through intermediate points of four body insertion parts; and a module coupling member inserted into at least one coupling hole and coupling one battery holder of the two battery holders with a battery holder belonging to another battery pack module.

Description

BATTERY PACK MODULE AND BATTERY PACK WITH STRONG BONDING FORCE}

This embodiment relates to a technique for packing a battery.

As the alertness to fossil energy increases, the use of electric vehicles using electric energy is gradually increasing. Electric vehicles, electric motorcycles, electric carts, etc., which are increasing in use in recent years, are all vehicles driven by electric energy. The key components of a vehicle that uses electrical energy are batteries and electric motors. In particular, the importance of the battery is becoming more important due to the share of manufacturing cost and safety issues.

The battery is manufactured in the form of a cell (battery cell) having a small volume, and a plurality of battery cells are connected in series to form a battery pack. The battery pack may obtain a high voltage through the series connection of the battery cells, and obtain a high battery capacity through the parallel connection of the battery cells.

Meanwhile, a battery cell may generate heat when converting chemical energy into electrical energy or converting electrical energy into chemical energy. In the battery pack, it is important to effectively discharge such heat. If the heat generated by the battery cells is not properly discharged, side reactions in the battery cells, which are not related to the conversion of chemical and electrical energy, may occur. These side reactions are the main cause of the explosion of the battery cells. . In this respect, there is a demand for the development of a battery packing technology that facilitates thermal control of a battery cell. In addition, there is a demand for the development of a battery packing technology that does not cause a fire even if the battery cells explode.

On the other hand, battery cells developed to date are not high in energy density, so the volume portion occupied by the above-mentioned means of transportation is high. The battery pack further uses additional configuration and space to pack these battery cells. This increased occupancy space can be a burden in the design of the vehicle. In this regard, there is a need for the development of a battery packing technology that can minimize the volume and weight of the entire battery pack.

On the other hand, the battery pack is packed in a module unit and may be configured to connect a plurality of modules to configure a single battery pack, in this case, the coupling force of the battery cells in the module and the coupling force between the modules may be a problem. When the coupling force of the battery cells is lowered or the coupling force between the modules is lowered, not only the power supply to the driving device is cut off but also the battery cell is detached and a strong shock is applied to the battery cell, which may lead to an explosion. In this respect, there is a need for the development of a battery packing technology that can enhance the bonding force in the battery pack.

Against this background, an object of this embodiment is, in one aspect, to provide a battery packing technique that facilitates thermal control of a battery cell. In another aspect, an object of the present embodiment is to provide a battery packing technique that can minimize the volume and weight of the entire battery pack. In another aspect, an object of the present embodiment is to provide a battery packing technology that can enhance the bonding force in the battery pack.

In order to achieve the above object, an embodiment is a battery pack module composed of a flame retardant material, having a cylindrical shape, a plurality of battery cells containing a lithium-based electrochemical material; Composed of a flame-retardant material, a plurality of body inserts into which the upper part or the lower part of the cylindrical body of the battery cell is inserted in a matrix form, providing or coupling a flow path through the intermediate points of the four body inserts Two battery holders providing holes; And a holder coupling member inserted into at least one of the coupling holes to couple the two battery holders.

In the battery pack module, the battery holder, a coupling member insertion tube protruding inward of the battery pack module at one of the intermediate points and the coupling hole is formed therein, and symmetrical to the one intermediate point. Another insertion point may be disposed in the insertion pipe seat that can be seated in the head of the coupling member insertion pipe.

In the battery pack module, at least one support lined in the longitudinal direction of the coupling member insertion tube may be further formed on the outer side of the coupling member insertion tube.

In the battery pack module, the coupling member insertion tube has a lower shape than the upper, the cross-sectional width of the coupling hole formed therein may be the same.

In the battery pack module, a connection pillar connected to the body insertion portion is further formed on an outer side of the insertion tube seating portion, and when the two battery holders are coupled, the connection pillar and the support may contact each other.

In the battery pack module, four support members may be formed in the coupling member insertion tube, and four connection pillars may be formed in the insertion tube seat.

The battery pack module further includes a short bolt that penetrates the insertion tube seating portion and passes through a portion of the coupling member insertion tube, and the head of the short bolt is extended from the insertion tube seating portion to the outside of the battery pack module. Can be located.

In the battery pack module, the battery holder further includes support plates for supporting an electrode surface (upper or lower surface) of the battery cell, the body inserting portion forms a cylindrical space into which the battery cell can be inserted, An outer surface of the cylindrical space may be blocked by the support plates to fix a portion of the cylindrical body of the battery cell.

In the battery pack module, the support plates may have a rectangular outer shape and a portion of an inner side thereof may be opened to provide a connection passage with the flow path hole or the coupling hole.

In the battery pack module, a plurality of openings are formed inside the coupling hole connecting support plate which is connected to the coupling hole among the support plates, and a position of one of the plurality of openings corresponds to the coupling hole and the other opening is the Air for cooling the battery cell may be distributed.

In the battery pack module, at each battery holder, support plates for supporting the electrode surfaces of the respective battery cells are disposed on a bottom surface of the electrode surfaces (upper or lower surface) of the plurality of battery cells, and the side surfaces of each battery holder. The base frame may extend from the outer edge of the bottom surface, and side plates standing along the sides of each battery holder in the base frame and surrounding the sides of the plurality of battery cells by half.

In the battery pack module, a wiring groove is formed in a portion of the base frame that meets the bottom surface, a terminal block is formed on one side plate of the side plates, and one of the battery cells Wiring connected to the electrode may be connected to the terminal through the wiring groove.

In the battery pack module, the battery holder, a coupling member insertion tube protruding into the battery pack module to the inside of one of the intermediate points and the coupling hole is formed therein, two battery pack modules Two coupling member insertion pipes disposed in the assembly may be assembled by long bolts.

In the battery pack module, the height of the coupling member insertion tube may be less than half of the height of the battery pack module.

Another embodiment, the battery pack module, A plurality of battery cells having a cylindrical shape; A plurality of body inserts into which a portion of an upper part or a lower part of the cylindrical body of the battery cell is inserted is formed in a matrix form, and two passages providing a flow path hole or a coupling hole through four intermediate points of the body insert part. Battery holder; And a module coupling member inserted into at least one of the coupling holes to couple one of the two battery holders with a battery holder belonging to the other battery pack module.

In the battery pack module, the upper battery holder of the two battery holder is connected to the other battery pack module connected upward through the module coupling member, the lower battery holder of the two battery holder is the module coupling member It can be connected to another battery pack module connected to the lower side through.

In the battery pack module, the battery holder, a coupling member insertion tube protruding into the battery pack module to the inside of one of the intermediate points and the coupling hole is formed therein, two battery pack modules Two coupling member insertion pipes disposed in the assembly may be assembled by long bolts.

In the battery pack module, the height of the coupling member insertion tube is less than half of the height of the battery pack module, when viewed in the longitudinal direction of the battery cell, the coupling member insertion tube respectively formed in the two battery holder is It may be placed in the same position.

In the battery pack module, the plurality of battery pack modules may be connected to a pack through bolt passing through the plurality of passage holes disposed in the plurality of battery pack modules.

In the battery pack module, the battery holder, a coupling member insertion tube protruding inward of the battery pack module at one of the intermediate points and the coupling hole is formed therein, and symmetrical to the one intermediate point. Another insertion point may be disposed in the insertion pipe seat that can be seated in the head of the coupling member insertion pipe.

In the battery pack module, at least one support lined in the longitudinal direction of the coupling member insertion tube may be further formed on the outer side of the coupling member insertion tube.

In the battery pack module, a connection pillar connected to the body insertion portion is further formed on an outer side of the insertion tube seating portion, and when the two battery holders are coupled, the connection pillar and the support may contact each other.

The battery pack module further includes a short bolt that penetrates the insertion tube seating portion and passes through a portion of the coupling member insertion tube, and the head of the short bolt is extended from the insertion tube seating portion to the outside of the battery pack module. Can be located.

In the battery pack module, the battery holder further includes support plates for supporting an electrode surface (upper or lower surface) of the battery cell, the body inserting portion forms a cylindrical space into which the battery cell can be inserted, An outer surface of the cylindrical space may be blocked by the support plates to fix a portion of the cylindrical body of the battery cell.

In the battery pack module, the support plates may have a rectangular outer shape and a portion of an inner side thereof may be opened to provide a connection passage with the flow path hole or the coupling hole.

In the battery pack module, a plurality of openings are formed inside the coupling hole connecting support plate which is connected to the coupling hole among the support plates, and a position of one of the plurality of openings corresponds to the coupling hole and the other opening is the Air for cooling the battery cell may be distributed.

In the battery pack module, at each battery holder, support plates for supporting the electrode surfaces of the respective battery cells are disposed on a bottom surface of the electrode surfaces (upper or lower surface) of the plurality of battery cells, and the side surfaces of each battery holder. The base frame may extend from the outer edge of the bottom surface, and side plates standing along the sides of each battery holder in the base frame and surrounding the sides of the plurality of battery cells by half.

As described above, according to the present embodiment, in the battery pack, thermal control of the battery cells can be facilitated, the volume and weight of the entire battery pack can be minimized, and the bonding force in the battery pack can be enhanced. In addition, according to the present embodiment, even if the battery cell is exploded by heat or shock, such a fire may not occur (reduce the possibility of ignition with a flame retardant material).

1 is a perspective view of a battery pack to which embodiments according to the present disclosure can be applied.
2 is a perspective view of a battery pack module according to a first embodiment.
3 is a diagram illustrating two battery holders separated from the battery pack module according to the first embodiment.
4 is a top side view of the battery pack module according to the first embodiment.
5 is a first side view of the battery pack module according to the first embodiment.
6 is a second side view of the battery pack module according to the first embodiment.
7 is a third side view of the battery pack module according to the first embodiment.
8 is a perspective view of the center of the battery pack module according to the first embodiment cut parallel to the xy plane.
9 is a perspective view of a battery holder according to the first embodiment.
10 is a perspective view of a battery pack module according to a second embodiment.
11 is a diagram illustrating two battery holders separated from the battery pack module according to the second embodiment.
12 is a top side view of the battery pack module according to the second embodiment.
13 is a first side view of the battery pack module according to the second embodiment.
14 is a second side view of the battery pack module according to the second embodiment.
15 is a third side view of the battery pack module according to the second embodiment.
16 is a perspective view of the center of the battery pack module according to the second embodiment cut parallel to the xy plane.
17 is a perspective view of a battery holder according to the first embodiment.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components as much as possible, even if displayed on different drawings. In addition, in describing the present invention, if it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

1 is a perspective view of a battery pack to which embodiments according to the present disclosure can be applied.

Referring to FIG. 1, the battery pack 100 may include a plurality of battery pack modules 110.

Directions are indicated in the drawings for convenience of description. In the drawing, the direction in which the battery pack modules 110 are stacked is indicated in the z direction, and the plane formed by disposing the battery cells 10 in each battery pack module 110 is indicated in the xy direction. In the xy direction, a direction in which the number of battery cells is large is displayed in the x direction, and a direction in which the number of battery cells is small is displayed in the y direction. According to the description, the z direction may be referred to as the longitudinal direction of the battery pack or the longitudinal direction of the battery cell. The x direction may be referred to as a horizontal direction and the y direction may be referred to as a vertical direction. In addition, in the following description, an upper surface or a lower surface is a surface when viewed from the z direction, and a side surface may be a surface when viewed from the x direction or the y direction.

In each battery pack module 110, the battery cells 10 may be connected in parallel.

The battery cell 10 may have a cylindrical shape. The battery cells 10 may be disposed such that the side surfaces of the cylindrical shape face each other, and the electrode surfaces of the respective battery cells 10 may be disposed on the top and bottom surfaces of the battery pack modules 110. In the battery pack module 110, the electrodes of the battery cells 10 may be disposed in the same direction. For example, the positive electrodes of each battery cell 10 may be located on the bottom surface of the battery pack module 110, and the negative electrodes of each battery cell 10 may be located on the top surface of the battery pack module 110. . Electrodes of each battery cell 10 disposed in the battery pack module 110 may be coupled to each other by an electrode connection member to connect the battery cells 10 in parallel.

Each battery pack module 110 may be connected in series with each other. The voltage of each battery pack module 110 may be determined by the voltage of the battery cell 10, and the voltage of the battery pack 100 may be determined by adding the voltage of each battery pack module 110 connected in series. The designer may increase the voltage of the battery pack 100 by increasing the number of stacked battery pack modules 110. In addition, the designer may increase the capacity of the battery pack 100 by increasing the number of battery cells 10 included in each battery pack module 110.

The battery cell 10 may include a lithium-based electrochemical material. The lithium-based electrochemical material may be, for example, a lithium ion-based material or a lithium polymer-based material. Lithium-based electrochemicals have a high energy density, but they can be a high risk of explosion or fire. There is also a possibility that the battery pack is ignited by the explosion of the battery cell 10, the battery pack module according to the embodiment is made of a flame retardant material can lower the possibility of such a ignition.

2 is a perspective view of a battery pack module according to a first embodiment, FIG. 3 is a view of separating two battery holders from a battery pack module according to a first embodiment, and FIG. 4 is a battery pack according to a first embodiment. 5 is a first side view of the battery pack module according to the first embodiment, FIG. 6 is a second side view of the battery pack module according to the first embodiment, and FIG. 7 is a first side view of the module. FIG. 8 is a perspective view of the center of the battery pack module cut parallel to the xy plane according to the first embodiment, and FIG. 9 is a perspective view of the battery holder according to the first embodiment.

2 to 9, the battery pack module 210 may include a plurality of battery cells 10, two battery holders 310a and 310b, and a holder coupling member.

The battery cell 10 has a cylindrical shape and may include a lithium-based electrochemical material.

The battery holders 310a and 310b may be formed of a flame retardant material, and a plurality of body inserting portions 320 into which a portion of an upper portion or a lower portion of the cylindrical body of the battery cell 10 is inserted may be formed in a matrix form. The battery holders 310a and 310b may provide the passage holes 411 or the coupling holes 413 and 415 through intermediate points of the four body inserting portions 320.

The battery holders 310a and 310b may have a plurality of body inserting portions 320 formed in a matrix. The body inserting part 320 may form a cylindrical space 321 into which the battery cell 10 may be inserted. The body inserting part 320 may be composed of a first body frame 322, a second body frame 324, and a third body frame 326. The first body frame 322 may have a cylindrical shape, and a cylindrical space 321 into which the battery cell 10 may be inserted may be formed. The second body frame 324 may be formed on the upper surface 32a or the lower surface 320b of the battery pack module 210 and may have a larger area than the edge of the first body frame 322. In the plurality of body inserting parts 320, the first body frames 322 may be spaced apart from each other. The second body frame 324 may be connected to each other in the plurality of body inserting parts 320, and the entire body inserting parts 320 may be connected to each other according to the connection of the second body frame. The third body frame 326 may connect two first body frames 322 to each other in the inner space 330 of the battery pack module 210. The third body frame 326 may be formed in the longitudinal direction (z direction) of the first body frame 322, and the thickness of the third body frame 326 may be thinly formed. For example, the third body frame 326 is formed so that a part of the edges of the two first body frames 322 are connected to each other, and the thickness thereof may be equal to the thickness of the edges of the first body frame 322. . The third body frame 326 may control the movement of the battery cell 10 in the inner space 330 by fixing the first body frame 322. When the third body frame 326 is formed too thick, the battery Insufficient space for air to flow outside the cell 10 may make it difficult to thermally cycle the inner space 330. According to this problem, the third body frame 326 is formed only to a thickness enough to control the movement of the first body frame 322, the space in which the third body frame 326 is not formed can circulate air. It will be left as it is.

The battery holders 310a and 310b may further include support plates 340 for supporting an electrode surface (upper or lower surface) of the battery cell 10. Part of the outer surface of the cylindrical space in the body inserting portion 320-the surface facing the upper or lower surface of the battery pack module 210-is blocked by the support plates 340, the battery cell by the blocked portion Some of the cylindrical body of 10 is fixed.

The support plates 340 may be formed at intermediate points of the four body inserting parts 320. For example, referring to FIG. 4, the first support plate 340a is formed at an intermediate point between the first body inserting portion 320a to the fourth body inserting portion 320d.

The support plates 340 may have a rectangular outer shape, and a portion of an inner side thereof may be opened to provide a connection passage with the passage hole 411 or the coupling holes 413 and 415.

The flow path 411 may provide a passage to supply air to the inner space 330 of the battery pack module 210 or to allow the air formed in the inner space 330 to flow out. Heat emitted to the side of the battery cell 10 may be discharged to the outside through the passage hole 411 after being transferred to the inner space 330. This may be used in an air cooled mode.

The coupling holes 413 and 415 may be divided into two types. The first coupling hole 413 may include a module coupling member for connecting two battery pack modules 210 to the second coupling hole 415. Holder coupling members for connecting two battery holders 310a and 310b in one battery pack module 210 may be inserted. One example of the module coupling member is a long bolt, one example of the holder coupling member is a short bolt. Long bolts are a type of bolt that may be longer than short bolts. The short bolt may be shorter than the long bolt as a kind of bolt.

A support plate opening 342 is formed inside the support plate 340, and the flow path hole 411 may be connected to the entire area of the support plate opening 342. In addition, the coupling holes 413 and 415 may be connected to a portion of the support plate opening 342. The coupling holes 413 and 415 are not connected to the coupling holes 413 and 415 in the support plate opening 342, and are not blocked by a frame or the like. The region may provide a passage that connects to the auxiliary flow path 412. The auxiliary channel hole 412 is smaller than the channel hole 411 but can be used for the purpose of circulating air in the inner space 330 in the same manner.

The battery holder 310 may have flow path holes 411 or coupling holes 413 and 415 formed at intermediate points of the four body inserting parts 320. Hereinafter, the intermediate point corresponding to the passage hole 411 is referred to as the passage hole intermediate point, and the intermediate point corresponding to the first coupling hole 413 corresponds to the middle point of the first coupling hole and the second coupling hole 415. The intermediate point is called the middle point of the second coupling hole.

A first coupling member insertion tube 810 may be disposed at the middle of the first coupling hole to protrude into the battery pack module 210 and to form a first coupling hole 413 therein. The two first coupling member insertion pipes 810 disposed on the two battery pack modules 210 may be coupled by long bolts, and the two battery pack modules 210 may be firmly coupled by such coupling. have.

A space having a wider cross-sectional area than the first coupling hole 413 may be formed inside the first coupling member insertion tube 810, and the head of the long bolt may be located or a nut coupled to the long bolt. have.

The height of the first coupling member insertion tube 810 may be less than half the height of the battery pack module 210-in fact, the height of the inner space 330. The first coupling member insertion tube 810 may be formed in both the first battery holder 310a positioned at the upper side and the second battery holder 310b positioned at the lower side at the same position on the xy plane. In order to prevent the first coupling member insertion tube 810 from colliding with the lower side, the height of the first coupling member insertion tube 810 may be less than half the height of the battery pack module 210.

The plurality of first coupling member insertion pipes 810 may be disposed in symmetrical positions with respect to the center of gravity of each battery holder 310. Alternatively, the plurality of first coupling member insertion pipes 810 may be disposed at positions symmetrical with respect to a line crossing the central center in the x direction. Alternatively, the plurality of first coupling member insertion pipes 810 may be disposed at positions symmetrical with respect to a line crossing the central center in the y direction.

A second coupling member insertion tube 820 may be formed at the middle of the second coupling hole to protrude into the battery pack module 210 and have a second coupling hole formed therein. In addition, an insertion tube seating portion 830 capable of seating the head of the second coupling member insertion tube 820 may be disposed at an intermediate point corresponding to the middle of the second coupling hole with respect to the center of gravity.

The second coupling member insertion tube 820a of the battery holder 310a positioned on the upper side is seated on the insertion tube seating portion 830 of the battery holder 310b positioned on the lower side, and the battery holder 310b positioned on the lower side. The second coupling member insertion tube 820b may be seated on the insertion tube seating portion 830 of the battery holder 310a located above.

At least one support 822 extending in the longitudinal direction of the second coupling member insertion tube 820 may be formed at an outer side of the second coupling member insertion tube 820. A connection column may be formed between the second coupling member insertion tube 820 and the support plate 340 or between the second coupling member insertion tube 820 and the body insertion portion 320, and the support 822 may be such a connection. It may be formed extending from the pillar. In addition, a connection column may be formed between the insertion tube seating portion 830 and the support plate 340 or between the insertion tube seating portion 830 and the body insertion portion 320. The support 822 may include two battery holders. When the 310a and 310b are coupled, they may be formed to contact the connecting pillar. The support 822 may perform a function of maintaining a constant distance between the lower battery holder 310b and the upper battery holder 310a.

The second coupling member insertion tube 820 has a lower portion having a thicker shape than the upper portion, and the cross-section width of the second coupling hole 415 formed therein may be the same as the upper portion and the lower portion.

As the holder coupling member, the short bolt may be assembled to penetrate the insertion tube seating portion 830 and penetrate a portion of the second coupling member insertion tube 820. At this time, the head of the short bolt may face the outside of the battery pack module 210.

Side surfaces of the battery holders 310a and 310b may include base frames 510a and 510b extending from an outline of a bottom surface (upper or lower surface) of the battery pack module 210 and each battery holder in the base frames 510a and 510b. Side plates 522a, 524a, 522b, and 524b may be disposed along the sides of the 310a and 310b and surround the sides of the plurality of battery cells 10 by half. Among the side plates 522a, 524a, 522b, and 524b, the half side plates 524a and 524b where the upper side and the lower side meet may correspond to half of the area of the other general side plates 522a and 522b. The general side plates 522a and 522b may be disposed to be spaced apart from each other, and heat generated in the internal space 330 of the battery pack module 210 may be leaked out through the space.

Wiring grooves 610a and 610b may be formed in a portion of the base frames 510a and 510b that meet the bottom surface of the battery pack module 210. Wiring connected to the electrodes of the battery cell 10 may be connected to the outside through the wiring grooves 610a and 610b. The terminal block 620 may be formed on one side plate of the side plates of the battery holders 310a and 310b. The wiring connected to the outside through the wiring grooves 610a and 610b is connected to the terminal block 620 and the other It can be easily connected to a device, for example a sensing device.

Hook male connectors 710a and 710b and hook female connectors 720a and 720b may be formed in the base frames 510a and 510b. The hook male connector 710a formed at the upper battery holder 310a of one battery pack module may be coupled to the hook female connector 720b formed at the lower battery holder 310b of the other battery pack module. The hook male connector 710b formed at the lower battery holder 310b of the other battery pack module may be coupled to the hook female connector 720a formed at the upper battery holder 310a of the one battery pack module. By this combination, two battery pack modules 210 may be coupled to each other. Hook male connectors 710a and 710b and hook female connectors 720a and 720b couple two battery pack modules 210 at the outer portion of each battery pack module 210, and the above-described module coupling member is a battery pack. While combining the two battery pack modules 210 in the inner portion of the module 210 can provide a bonding force evenly in the entire contact area.

Four vertices of the outer edges of the battery holders 310a and 310b may be formed with a third coupling hole in the z direction. The two battery holders 310a and 310b may be coupled through the outer coupling member inserted into the third coupling hole. If the outer coupling member couples the two battery holders 310a and 310b in the outer portion, the above-described holder coupling member combines the two battery holders 310a and 310b in the inner portion of each battery pack module 210, The bonding force can be provided evenly in the area.

Fusion protrusions 382a, 382b, 384a, and 384b may be further formed on the battery holders 310a and 310b.

First fusion protrusions 382a and 382b may be formed in the base frames 510a and 510b of the battery holders 310a and 310b to be in contact with other battery pack modules. After the two battery pack modules are coupled to each other, the base frames 510a and 510b of each battery pack module may be in contact with each other, and heat may be applied to the first fusion protrusions 382a and 382b. , 382b) may be melted and two battery pack modules are thermally fused.

Side plates 522a, 522b, 524a, and 524b of the battery holders 310a and 310b are portions in which the side plates 522a, 522b, 524a, and 524b and the base frame 510a and 510b are in contact with each other. 384a and 384b may be formed. Two battery holders 310a and 310b are coupled to each other so that the second fusion protrusion 384a of the first battery holder 310a is coupled to the base frame 510b of the second battery holder 310b and the second battery holder 310b is connected thereto. After the second fusion projections 384b of the 3) is coupled to the base frame 510a of the first battery holder 310a, heat may be applied to the second fusion projections 384a and 384b. As the 384a and 384b are melted, the two battery holders 310a and 310b may be thermally fused.

10 is a perspective view of a battery pack module according to a second embodiment, FIG. 11 is a view illustrating two battery holders separated from the battery pack module according to a second embodiment, and FIG. 12 is a battery pack according to a second embodiment. 13 is a first side view of the battery pack module according to the second embodiment, FIG. 14 is a second side view of the battery pack module according to the second embodiment, and FIG. 15 is a second side view of the module. FIG. 16 is a perspective view of the center of the battery pack module cut parallel to the xy plane according to the second embodiment, and FIG. 17 is a perspective view of the battery holder according to the first embodiment.

10 to 17, the battery pack module 1210 may include a plurality of battery cells 10, two battery holders 1310a and 1310b, and a holder coupling member.

The battery cell 10 has a cylindrical shape and may include a lithium-based electrochemical material.

The battery holders 1310a and 1310b are made of a flame retardant material, and a plurality of body inserting portions 1320 into which a portion of an upper portion or a lower portion of the cylindrical body of the battery cell 10 is inserted may be formed in a matrix form. The battery holders 1310a and 1310b may provide the passage holes 1411 or the coupling holes 1413 and 1415 through intermediate points of the four body inserting portions 1320.

The battery holders 1310a and 1310b may have a plurality of body inserting portions 1320 in a matrix form. The body inserter 1320 may form a cylindrical space 1321 into which the battery cell 10 may be inserted. The body inserter 1320 may be configured of a first body frame 1322, a second body frame 1324, and a third body frame 1326. The first body frame 1322 has a cylindrical shape, and a cylindrical space 1321 into which the battery cell 10 may be inserted may be formed. The second body frame 1324 is formed on the upper or lower surface of the battery pack module 1210 and may be formed to have a larger area than the edge of the first body frame 1322. In the plurality of body insertion units 1320, the first body frames 1322 may be spaced apart from each other. In addition, the second body frame 1324 may be connected to each other in the plurality of body inserting parts 1320, and the entire body inserting parts 1320 may be connected to each other according to the connection of the second body frame. The third body frame 1326 may connect the two first body frames 1322 in the inner space 1330 of the battery pack module 1210. The third body frame 1326 may be formed in the longitudinal direction (z direction) of the first body frame 1322, and the thickness of the third body frame 1326 may be thinly formed. For example, the third body frame 1326 is formed so that a part of the edges of the two first body frames 1322 are connected to each other, and the thickness thereof may be equal to the thickness of the edges of the first body frame 1322. . The third body frame 1326 may control the movement of the battery cell 10 in the inner space 1330 by fixing the first body frame 1322. When the third body frame 1326 is formed too thick, the battery Insufficient space for air to flow outside the cell 10 may make it difficult to thermally circulate the inner space 1330. According to this problem, the third body frame 1326 is formed to have a thickness enough to control the movement of the first body frame 1322, the air is circulated in the space where the third body frame 1326 is not formed. It will be left as it is.

The battery holders 1310a and 1310b may further include support plates 1340 for supporting an electrode surface (upper or lower surface) of the battery cell 10. In the body insertion unit 1320, a part of the outer surface of the cylindrical space-the surface facing the upper or lower surface of the battery pack module 1210-is blocked by the support plates 1340, the battery cell by the block portion Some of the cylindrical body of 10 is fixed.

The support plates 1340 may be formed at intermediate points of the four body inserts 1320. For example, referring to FIG. 12, a first support plate 1340a is formed at an intermediate point between the first body inserting portions 1320a to the fourth body inserting portions 1320d.

The support plates 1340 may have a rectangular outer shape, and a portion of the support plates 1340 may be opened to provide a connection passage with the passage hole 1411 or the coupling holes 1413 and 1415.

The flow path hole 1411 may provide a passage to supply air to the inner space 1330 of the battery pack module 1210 or to allow air formed in the inner space 1330 to flow out. Heat emitted to the side of the battery cell 10 may be discharged to the outside through the passage hole 1411 after being transferred to the inner space 1330. This may be used in an air cooled mode.

The coupling holes 1413 and 1415 may be divided into two types. The first coupling hole 1413 may include a module coupling member for connecting two battery pack modules 1210 to the second coupling hole 1415. Holder coupling members for connecting two battery holders 1310a and 1310b in one battery pack module 1210 may be inserted. One example of the module coupling member is a long bolt, one example of the holder coupling member is a short bolt. Long bolts are a type of bolt that may be longer than short bolts. The short bolt may be shorter than the long bolt as a kind of bolt.

A support plate opening 1342 is formed inside the support plate 1340, and the flow path hole 1411 may be connected to the entire region of the support plate opening 1342. In addition, the coupling holes 1413 and 415 may be connected to a partial region of the support plate opening part 1342, and are not connected to the coupling holes 1413 and 415 in the support plate opening part 1342, and are not blocked by a frame or the like. The region may provide a passageway that is connected to the auxiliary flow path hole 1412. The auxiliary channel hole 1412 is smaller than the channel hole 1411 but may be used to circulate air in the inner space 1330 in a functionally identical manner.

The first coupling hole 1413 may be formed in the same shape as the support plate opening portion 1342a. At this time, the first coupling hole 1413 may have a circular shape so that the body of the long bolt can be inserted. The second coupling hole 1415 may have a smaller size than the first coupling hole 1413, and the auxiliary channel hole 1412 described above may be formed around the second coupling hole 1415.

In the battery holder 1310, flow path holes 1411 may be formed at intermediate points of the four body inserting parts 1320, or coupling holes 1413 and 1415 may be formed. Hereinafter, the intermediate point corresponding to the passage hole 1411 is referred to as the passage hole intermediate point, and the intermediate point corresponding to the first coupling hole 1413 corresponds to the first coupling hole intermediate point and the second coupling hole 1415. The intermediate point is called the middle point of the second coupling hole.

A first coupling member insertion tube 1810 may be disposed at an intermediate point of the first coupling hole to protrude into the battery pack module 1210 and have a first coupling hole 1413 formed therein. Two first coupling member insertion pipes 1810 disposed in the two battery pack modules 1210 may be coupled by long bolts, and the two battery pack modules 1210 may be firmly coupled by this coupling. have.

A space having a larger cross-sectional area than the first coupling hole 1413 may be formed inside the first coupling member insertion tube 1810, and a head of the long bolt may be located or a nut coupled with the long bolt. have.

The height of the first coupling member insertion tube 1810 may be equal to or less than half the height of the battery pack module 1210-in fact, the height of the inner space 1330. The first coupling member insertion tube 1810 may be formed in both the first battery holder 1310a positioned at the upper side and the second battery holder 1310b positioned at the lower side in the same position on the xy plane. The height of the first coupling member insertion tube 1810 may be less than half the height of the battery pack module 1210 so that the first coupling member insertion tube 1810 does not collide with the lower side.

The plurality of first coupling member insertion pipes 1810 may be disposed in symmetrical positions with respect to the center of gravity of each battery holder 1310. Alternatively, the plurality of first coupling member insertion pipes 1810 may be disposed at positions symmetrical with respect to a line crossing the central center in the x direction. Alternatively, the plurality of first coupling member insertion tubes 1810 may be disposed at positions symmetrical with respect to a line crossing the central center in the y direction. Referring to FIG. 17, it can be seen that the first coupling member insertion tube 1810 is symmetrically disposed at four locations with respect to the center of gravity.

A second coupling member insertion tube 1820 may be formed at the middle of the second coupling hole to protrude into the battery pack module 1210 and have a second coupling hole formed therein. In addition, an insertion tube seating part 1830 may be disposed at the intermediate point corresponding to the middle of the second coupling hole with respect to the center of the center of the second coupling member insertion tube 1820.

The second coupling member insertion tube 1820a of the battery holder 1310a positioned on the upper side is seated on the insertion tube seating portion 1830 of the battery holder 1310b positioned on the lower side, and the battery holder 1310b positioned on the lower side. The second coupling member insertion tube 1820b may be seated on the insertion tube seating portion 1830 of the battery holder 1310a positioned above.

At least one support 1822 extending in the longitudinal direction of the second coupling member insertion tube 1820 may be formed at an outer side of the second coupling member insertion tube 1820. A connection column may be formed between the second coupling member insertion tube 1820 and the support plate 1340 or between the second coupling member insertion tube 1820 and the body insertion portion 1320, and the support 1822 may be connected to It may be formed extending from the pillar. In addition, a connection pillar may be formed between the insertion tube seating part 1830 and the support plate 1340 or between the insertion tube seating part 1830 and the body insertion part 1320, and the support 1822 includes two battery holders. When the 1310a and 1310b are coupled, they may be formed to contact the connecting pillar. The support 1822 may perform a function of maintaining a constant distance between the lower battery holder 1310b and the upper battery holder 1310a.

The second coupling member insertion tube 1820 has a lower shape than the upper portion, the cross-sectional width of the second coupling hole 1415 formed therein may be the same as the upper and lower.

As the holder coupling member, the short bolt may be assembled to penetrate the insertion tube seating portion 1830 and penetrate a part of the second coupling member insertion tube 1820. In this case, the head of the short bolt may face the outside of the battery pack module 1210.

Side surfaces of the battery holders 1310a and 1310b may include base frames 1510a and 1510b extending from an outline of a bottom surface (top or bottom surface) of the battery pack module 1210 and each battery holder (eg, each of the base holders 1510a and 1510b). Side plates 1522a and 1522b may be disposed along the sides of the 1310a and 1310b and surround the sides of the plurality of battery cells 10 by half. The side plates 1522a and 1522b may be disposed to be spaced apart from each other, and heat generated in the internal space 1330 of the battery pack module 1210 may flow out through the space.

The terminal block 1620 may be formed on one side plate of the side plates of the battery holders 1310a and 310b. The wiring connected to the outside from the electrode of the battery cell 10 is connected to the terminal block 1620 and other external devices are connected. -For example, a sensing device.

At the center of the battery pack module 1210, a module coupling member may be arranged to connect the modules. A holder coupling member may be further attached to an outer frame of the battery pack module 1210, for example, a base frame or side plates. Can be arranged.

Although not shown in the drawings, a plurality of battery pack modules may be connected by a pack through bolt passing through a plurality of flow path holes disposed in the plurality of battery pack modules.

According to the embodiment described above, in the battery pack, it is easy to thermally control the battery cell, to minimize the volume and weight of the entire battery pack, it is possible to enhance the bonding force in the battery pack. Further, according to this embodiment, even if the battery cell is exploded by heat or shock may not cause a fire by such an explosion.

The terms "comprise", "comprise" or "having" described above mean that a corresponding component may be included unless specifically stated otherwise, and thus, other components are not excluded. It should be construed that it may further include other components. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (13)

In the battery pack module,
A plurality of battery cells having a cylindrical shape;
A plurality of body inserts into which a portion of an upper portion or a lower portion of the cylindrical body of the battery cell is inserted is formed in a matrix form, and some of the intermediate points of the four body inserts are formed in a direction in which the body inserts are formed. Two battery holders having a first coupling member insertion tube which protrudes and a first coupling hole is formed therein, and at least some other intermediate points, a flow path hole is formed; And
Inserted into the interior of the first coupling member insertion tube in the space in which the body insertion portion is formed, one end of the long bolt is fastened to the coupling hole formed in the battery holder of the other battery pack module through the first coupling hole,
A base frame extending from an outline of a bottom surface is formed at each side of each of the two battery holders, and at least one fusion protrusion is formed at a portion of the base frame contacting the battery holder of the other battery pack module. One or more fusion protrusions are melted by heat in a state in which a battery holder of one side of the battery holder and the battery holder of the other battery pack module are coupled by the long bolts, so that the battery holder of the one side battery holder and the other battery pack module is melted by heat. Fusion bonding
Battery pack module. The method of claim 1,
The battery holder of the one side of the two battery holder is connected to the other battery pack module connected to one side through the long bolt,
The battery pack module of the other battery holder of the two battery holder is connected to another battery pack module connected to the other side through the long bolt. delete The method of claim 1,
The height of the first coupling member insertion tube is less than half of the height of the battery pack module,
When viewed in the longitudinal direction of the battery cell, the first coupling member insertion tube respectively formed in the two battery holders are disposed in the same position battery pack module. The method of claim 1,
The battery pack module is connected to the plurality of battery pack module through a plurality of through-hole bolt through the plurality of passage holes disposed in the plurality of battery pack module. The method of claim 1,
The battery holder,
A second coupling member insertion tube which protrudes into the battery pack module at one intermediate point among the intermediate points and has a second coupling hole formed therein, and
The battery pack module has an insertion tube seating portion that can be seated to the head of the second coupling member insertion tube in another intermediate point symmetrical to the one intermediate point. The method of claim 6,
The battery pack module is further formed on the outer periphery of the second coupling member insertion tube is formed with at least one support extending in the longitudinal direction of the second coupling member insertion tube. The method of claim 7, wherein
The outer side of the insertion tube seating portion is further formed with a connecting column connected to the body inserting portion,
The battery pack module is in contact with the support pillar and the support when the two battery holders are coupled. The method of claim 6,
Further comprising a short bolt that penetrates the insertion tube seating portion and is assembled through a portion of the second coupling member insertion tube,
The head of the short bolt is a battery pack module which is located out of the battery pack module from the insertion pipe seat. The method of claim 1,
The battery holder further includes support plates for supporting an electrode surface (upper or lower surface) of the battery cell,
The body inserting portion forms a cylindrical space into which the battery cell can be inserted,
A battery pack module for fixing a portion of the cylindrical body of the battery cell by the outer surface of the cylindrical space is blocked by the support plates. The method of claim 10,
The support plates,
A battery pack module having an outer shape formed in a rectangular shape and having a portion of an inner side thereof opened to provide a connection passage with the passage hole or the first coupling hole. The method of claim 10,
A plurality of openings are formed inside the coupling hole connecting support plate which is connected to the first coupling hole among the support plates, and a position of one of the plurality of openings corresponds to the first coupling hole and the battery cell is the other opening. Battery pack module in which air to cool the circulation. The method of claim 1,
In each battery holder, support plates for supporting the electrode surfaces of the battery cells are disposed on a bottom surface of the electrode surfaces (upper or lower surface) of the plurality of battery cells.
The side of each of the two battery holders, the battery pack module is disposed along the side of each battery holder in the base frame and the side plates surrounding the sides of the plurality of battery cells by half.

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