KR101944826B1 - Battery Module and Middle or Large-sized Battery Module having Battery Module - Google Patents

Abstract

The battery module and the middle- or large-sized battery module including the battery module according to the present invention include a plurality of battery cells stacked and electrically connected to each other, a plurality of cartridges on which at least one of the battery cells is seated, A plurality of partitions having an aluminum panel fixed on a lower surface thereof, an upper cover located on an upper portion of the cartridge positioned at the uppermost portion of the cartridge, and a lower cover positioned below the cartridge positioned at the lowest portion of the cartridge, , The partition, the upper cover, and the lower cover are fixed by the bolts.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery module and a middle- or large-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery module and a large battery module including the battery module. More particularly, the present invention relates to a battery module including a partition having an aluminum panel on both sides of a plurality of battery cells, And more particularly, to a battery module having high reliability and a high productivity, and a middle- or large-sized battery module including the battery module.

2. Description of the Related Art Generally, unlike a primary battery, a secondary battery capable of charging and discharging is under active research due to development of advanced fields such as a digital camera, a cellular phone, a notebook, and a hybrid vehicle. Examples of the secondary battery include a nickel-cadmium battery, a nickel-metal hydride battery, a nickel-hydrogen battery, and a lithium secondary battery. Among them, the lithium secondary battery has a working voltage of 3.6 V or more and is used as a power source for a portable electronic device, or a plurality of batteries are connected in series to be used in a high-output hybrid vehicle. In a nickel-cadmium battery or a nickel-metal hydride battery The operating voltage is three times higher than that of the conventional method, and the energy density per unit weight is also excellent.

The lithium secondary battery can be manufactured in various forms. Typical examples of the lithium secondary battery include a cylinder type and a prismatic type, which are mainly used in a lithium ion battery. In recent years, a lithium polymer battery has been manufactured in a pouch type having flexibility and its shape is relatively free.

Since the pouch type lithium polymer battery (hereinafter referred to as " pouch type cell ") can be easily bent or bent, it is necessary to protect the pouch type lithium polymer battery with a strong case device for a long time. However, conventionally, The tabs were connected by a PCB (Printed Circuit Board) on which circuit patterns were formed and the tabs were placed in a case.

However, according to the method of stacking the conventional pouch-type cells and constructing the high-output battery module, the pouch-type cell having a weak structure can not be safely protected, and a method of stacking a plurality of pouch- It is not strong enough against environmental changes such as impact.

There is a " case for a high output lithium secondary battery " of Patent Publication 2006-0102207, in which a pouch type cell constituting a lithium battery used as a high output power source is laminated more reliably and stably and can be reliably connected in series.

1, a "case for a high-output lithium secondary battery" of Patent Publication No. 2006-0102207 includes a pouch 11 for supporting a pouch 11 of a pouch type cell 10 constituted by a pouch 11 and an electrode tab 12, A shelf-like heat dissipating part 22 formed on one surface of the pouch supporting frame 21 and providing a space for discharging heat generated from the pouch 11; And a wall-shaped tab support portion 23 formed at one side of the pouch-shaped cell 10 and supporting the electrode tab 12 of the pouch-

Referring to FIG. 2, the battery module 30 in which the pouch-shaped cells 10 are firmly and stably stacked can be manufactured by using the "high-output lithium secondary battery case" as described above.

However, the battery module 30 as described above has a problem in that the pouch support frame 21 is coupled to both sides of the pouch cell 10, so that the assembly process is complicated and the assembly and productivity are not excellent.

Korean Patent Publication No. 2006-0102207

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a battery module having excellent assembly and productivity and capable of stably protecting a battery cell, and a middle and large battery module including the same.

In order to solve the above-described problems, the inventive battery module has a plurality of battery cells stacked and formed with electrode taps and electrically connected to each other, a plurality of cartridges on which at least one battery cell is seated, A bus bar having a bus bar hole is connected to an electrode tab portion of the battery cell, and a bus bar hole of the bus bar is connected to a bus bar hole of a bus bar connected to another neighboring electrode tab portion, And the second bolts are inserted into the bus bar insertion holes formed in the partition, and the overlapping bus bars are held in close contact with each other to be electrically connected to the partition .
The battery module may further include an aluminum panel fixed to the upper and lower surfaces of the partition, an upper cover positioned at an upper portion of the cartridge located at the uppermost portion of the cartridge, and a lower cover located at a lower portion of the cartridge located at the lowermost portion of the cartridge. Wherein the cartridge, the partition, the upper cover, and the lower cover are fixed by the first bolt.
The partition is provided with panel fixing protrusions on both sides thereof, and the panel fixing protrusion is inserted into a panel hole formed in the panel, so that the panel is fixed to the partition.
The partition A includes a partition A, a partition B, and a partition C, wherein the partition A is located at the lowermost end of the partition, a battery module fixing part is formed at a side of each corner, And a temperature sensor is mounted on the temperature sensor mounting portion, and the partition C is a partition excluding the partition A and the partition B.
The partition A is made of polyphenylene sulfide (PPS) containing 40% of GF (Glass Fiver), and a partition excluding the partition A is made of mPPO (modified polyphenylene oxide) with 20% glass fiber (GF) And the like.
In addition, a PCB is installed on a front surface of the battery module, and a plurality of the bus bars are electrically connected to the PCB, and the temperature sensor is connected to receive temperature data.
And a front cover and a rear cover for protecting the battery module and the PCB.
The battery module includes a plurality of battery modules, and the battery module is electrically connected to an adjacent battery module through an external bus bar to form a middle or large battery module.
Also, the external bus bar may include a bus bar protecting member made of a plastic material.
The bus bar protecting member may include an upper bus bar protecting member and a lower bus bar protecting member.
In addition, the middle- or large-sized battery module may further include an air blocking member positioned between the battery modules.
The air blocking member may include an air blocking pad, an upper cover blocking member, and a lower cover blocking member, wherein the air blocking pad is positioned between the upper cover blocking member and the lower cover blocking member.

The battery module of the present invention and the middle- or large-sized battery module including the same have a partition having an aluminum panel on both sides while a plurality of battery cells are stacked to provide an assembly and productivity, .

Further, the durability of the battery module is improved by changing the material of the partition, and the welding failure can be prevented by connecting the battery tab with the bolt.

In addition, it is possible to absorb the vibration between the battery modules, including the air shutoff member, and to prevent the components from being damaged.

Further, by attaching the bus bar protecting member to the external bus bar, it is possible to prevent the external bus bar from being broken and to prevent contact from the outside.

1 is an exploded perspective view of a secondary battery using a conventional case for a high-output lithium secondary battery.
2 is a perspective view of a battery module using a conventional high-output lithium secondary battery case.
3 is a perspective view of a battery module of the present invention.
4A is a perspective view of a battery cell according to the present invention;
4B is a perspective view showing a coupling relationship of the battery cell of the present invention
5A is a cross-sectional view taken along the line B-B 'in FIG. 4A
FIG. 5B is a cross-sectional view taken along line C-C '
6 is an exploded view and partial enlarged view of a partition according to the present invention;
Figure 7 is a top view of partitions A, B, and C of the present invention.
8 is a perspective view of a partition B of the present invention
9 is a partial cross-sectional view of the battery module of the present invention
10 is an exploded view of the battery module of the present invention
11 is a perspective view of a middle / large battery module in which a plurality of battery modules of the present invention are connected,
12 is a front view of a middle- or large-sized battery module to which a plurality of battery modules according to the present invention are connected
13 is a perspective view of a middle- or large-sized battery module in which a plurality of battery modules of the present invention are connected using an external bus bar
14 is an exploded perspective view of the external bus bar of the present invention
15 is a perspective view of a middle- or large-sized battery module including the air shut-off member of the present invention
16 is an exploded perspective view of the air shielding member of the present invention.

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

It is to be understood, however, that the appended drawings illustrate only typical embodiments of the present invention and are not to be considered as limiting the scope of the present invention.

3 is a perspective view showing the battery module 1000 of the present invention.

The battery module 1000 of the present invention includes a plurality of battery cells 100, a plurality of cartridges 130, a plurality of partitions 200, an upper cover 510, and a lower cover 520 do.

The battery cells 100 are stacked and electrically connected to each other.

At least one of the battery cells 100 is seated in the cartridge 130.

The partition 200 is located between the cartridges 130 and the aluminum panel 210 is fixed on the bottom surface.

The upper cover 510 is located at an upper portion of the cartridge 130 located at the uppermost portion of the cartridge 130.

The lower cover 520 is positioned at a lower portion of the cartridge 130 located at the lowermost portion of the cartridge 130.

Here, the cartridge 130, the partition 200, the upper cover 510, and the lower cover 520 are formed with holes and are fixed to each other by the first bolts 310 The first bolt 310 may be an elongated bolt because it connects the entire battery module and the first bolt 310 may be referred to as a long bolt.

That is, the battery module 1000 can be assembled with the structure in which the partition 200 and the cartridge 130 are sequentially stacked, thereby shortening the assembling process.

4A is a perspective view showing a battery cell 100 of the present invention, FIG. 4B is a perspective view showing a coupling relationship between battery cells 100 of the present invention, FIG. 5A is a sectional view of the battery cell 100 of the present invention, 5B is a cross-sectional view showing a coupling relationship between the battery cells 100;

As shown in the drawing, the battery cell 100 is welded to the electrode tab 110 with a bus bar 120, and the bus bar 120 is formed with a bus bar hole 121 The bus bar insertion hole 212 formed in the bus bar hole 121 and the bus bar insertion hole 212 formed in the partition 200 is in contact with the bus bar 120 of the adjacent battery cell 100, The second bolt 320 is inserted and fixed (see FIG. 4B). Here, since the second bolt 320 is fixed to the partition 200, a bolt may be used. In the following description, the second bolt may be referred to as a bolt.

The bus bar 120 and the bus bar 120 formed on the bus bar 120 are closely contacted and electrically connected to each other, The bus bar holes 121 formed in the adjacent bus bars 120 are coupled to each other so as to be overlapped with each other so that the end bolts 320 are inserted and fixed to each other, and the end bolts 320 are formed in the partition 200 And the bus bar 120 is fixed to one side of the partition 200 (see FIG. 5).

Therefore, when the bus bars 120 are electrically connected to each other, it is possible to reduce the defect rate due to the poor welding by inserting the stepped bolts 320 instead of connecting them, There are advantages to be able to.

7 is a perspective view of partition A 220, partition B 230, and partition C 240 of the present invention, and FIG. 8 is a perspective view of partition B (230).

6, at least one panel fixing protrusion 213 is formed on both sides of the partition 200, a panel hole 211 is formed in the aluminum panel 210, The panel fixing protrusion 213 is inserted into the partition panel 211 to fix the aluminum panel 210 to the partition 200.

As shown in FIG. 7, the partition 200 can be divided into a partition A 220, a partition B 230, and a partition C 240 according to locations in the battery module 1000.

The partition A 220 is located at the lowermost end of the partition 200, and battery module securing parts 221 are formed on the sides of the corners.

The battery module fixing part 221 serves to fix the battery module 1000 and the neighboring battery module 1000 to each other.

The partition B 230 is located at the center of the partition 200 and a temperature sensor mounting portion 231 is formed so that the temperature sensor 232 is positioned on the temperature sensor mounting portion 231, 232 is connected to a PCB 400 to be described later and serves to transmit the internal temperature of the battery module 1000 (see FIG. 8).

The partition C 240 is characterized in that there is no battery module fixing part 221 formed in the partition A 220 and no temperature sensor mounting part 231 formed in the partition B 230 do.

In addition, the partition A 220 is made of polyphenylene sulfide (PPS) containing 40% of GF (Glass Fibers). The partition A 220 is divided into a partition B 230 excluding the partition A 220, C (240) is made of mPPO (Modified Polyphenylene Oxide) containing 20% of GF (Glass Fiver).

That is, the partition A 220 includes the battery module fixing part 221 for fixing the battery module 1000, and the partition A 230 is made of a material having a higher strength than the partition B 230 and the partition C 240 .

9 is a partial cross-sectional view of the battery module 1000 of the present invention.

As shown in the figure, the battery module 1000 is stacked with the battery cell 100, and is electrically connected to the adjacent battery cell 100 and the bus bar 120. The bus bar 120 is inserted and fixed to the bus bar insertion hole 212 formed in the partition 200.

10 is an exploded view of the battery module 1000 of the present invention.

A PCB 400 is installed on a front surface of the battery module 1000. The PCB 400 is electrically connected to the bus bar 120 formed on the battery module 1000 to measure a voltage, And is connected to the temperature sensor 232 to receive internal temperature data of the battery module 1000.

A front cover 530 is installed on a front surface of the battery module 1000 to protect the PCB 400 and the battery cell 100. The rear surface of the battery module 1000 has a rear surface A cover 540 is installed to protect the battery cell 100.

11 to 13 are a perspective view and a front view showing a large battery module 10 in which a plurality of battery modules 1000 of the present invention are connected.

The battery module 1000 may be combined with a plurality of battery modules 1000 to be used as a large battery module. At this time, the battery module 1000 adjacent to the battery module 1000 is fixed to the battery module fixing part 221 formed on the partition A 220 (refer to FIG. 11) The battery module 600 may be electrically connected to the neighboring battery module 1000 and used as the middle or large battery module 10. (See FIGS. 12 and 13)

The shape and structure of the external bus bar 600 of the present invention will be described in detail with reference to FIG.

The external bus bar 600 covers the external bus bar 600 with the bus bar protecting member 610 and protects the external bus bar 600 from external damage and corrosion.

Also, since the external bus bar 600 is electrically connected between the battery modules 1000, it is preferable that the external bus bar 600 is made of a non-conductive plastic material.

The upper bus bar protecting member 610 includes an upper bus bar protecting member 611 and a lower bus bar protecting member 612. The upper bus bar protecting member 611 includes an upper surface And the lower bus bar protecting member 612 covers the outer bus bar 600 except for both ends.

At this time, the upper bus bar protecting member 611 covers the entire surface of the external bus bar 600, so that the user can contact the external bus bar 600 through which electricity flows, thereby preventing an electrical accident.

In addition, the external bus bar 600 may be formed variously according to the shape of the battery module 1000, as shown in FIG.

The shape and structure of the air shutoff member of the present invention will be described in detail with reference to Figs. 15 and 16. Fig.

Wherein the middle / large battery module (10) further comprises an air blocking member (700) positioned between the battery modules (1000).

The air blocking member 700 includes an air blocking pad 710, an upper cover blocking member 721 and a lower cover blocking member 722. The upper cover blocking member 721 and the lower cover blocking member 721 722 are positioned between the front portion and the rear portion, respectively.

At this time, the air blocking member 700 is positioned between the battery modules 1000 to block penetration of air into spaces separated between the battery modules 1000, and the battery module 1000 absorbs vibration Thereby preventing the parts from being damaged.

In addition, the air blocking member 700 may be formed variously according to the shape of the battery module 1000, as shown in the figure.

Therefore, the battery module 1000 of the present invention has the partition 200 having the aluminum panel 210 on both sides thereof while the plurality of battery cells 100 are stacked, The battery cell 100 can be stably protected.

In addition, durability of the battery module 1000 can be improved by changing the material of the partition 200, and welding failure can be prevented by connecting the electrode tab 110 with the stepped bolt 320.

In addition, it is possible to absorb the vibration between the battery modules 1000, including the air blocking member 700, and to prevent the parts from being damaged.

In addition, by attaching the bus bar protecting member 610 to the external bus bar 600, it is possible to prevent the external bus bar 600 from being broken, and to prevent the external bus bar 600 from being contacted from the outside.

10: Medium and large battery module
1000: Battery module
100: Battery cell 110: Electrode tab
120: bus bar 121: bus bar hole
130: Cartridge
200: Partition 210: Aluminum panel
211: Panel hole 212: Bus bar insertion hole
213: panel fixing projection
220: partition A 221: battery module fixing section
230: partition B 231: temperature sensor mounting part
232: Temperature sensor
240: partition C 250: partition D
300: Fixing member
310: Long Bolt 320: Short Bolt
400: PCB
510: upper cover 520: lower cover
530: Front cover 540: Rear cover
600: external bus bar 610: bus bar protective member
611: upper bus bar protecting member 612: lower bus bar protecting member
700: air blocking member 710: air blocking pad
720: cover blocking member 721: upper cover blocking member
722: Lower cover blocking member

Claims (12)

A plurality of battery cells stacked and formed with electrode taps and electrically connected to each other;
A plurality of cartridges on which at least one of the battery cells is seated; And
And a plurality of partitions located between the cartridges,
A bus bar having a bus bar hole is connected to the electrode tab portion of the battery cell,
Wherein the bus barholes of the bus bars are disposed so as to overlap with the bus barholes of the bus bars connected to the neighboring electrode tabs,
Wherein the second bolt is inserted into the bus bar insertion holes formed in the partition and the plurality of bus bar holes are overlapped with each other so that the overlapping bus bars are closely contacted and fixed to the partition while being electrically connected to each other.
The battery module according to claim 1,
An aluminum panel fixed to the upper and lower surfaces of the partition;
An upper cover positioned at an upper portion of the cartridge positioned at the uppermost portion of the cartridge; And
And a lower cover located at a lower portion of the cartridge positioned at the lowermost portion of the cartridge,
Wherein the cartridge, the partition, the upper cover, and the lower cover are fixed by a first bolt,
The method according to claim 1,
Wherein the partition is provided with panel fixing protrusions on both sides thereof and the panel fixing protrusion is inserted into a panel hole formed in the panel so that the panel is fixed to the partition.
The method according to claim 1,
The partition includes partition A, partition B, and partition C,
The partition A is located at the lowest end of the partition, and battery module fixing parts are formed on the side surfaces of the corners,
The partition B is located at the center of the partition, and a temperature sensor mounting portion is formed, and a temperature sensor is positioned on the temperature sensor mounting portion
And the partition C is a partition excluding the partition A and the partition B.
5. The method of claim 4,
The partition A is made of PPS (Polyphenylene Sulfide) containing 40% of GF (Glass Fiver)
Wherein the partition excluding the partition A comprises mPPO (Modified Polyphenylene Oxide) and 20% GF (Glass Fiver).
5. The method of claim 4,
Wherein a PCB is installed on a front surface of the battery module, and a plurality of bus bars are electrically connected to the PCB, and the temperature sensor is connected to receive temperature data.
The method according to claim 6,
And a front cover and a rear cover for protecting the battery module and the PCB.
8. The method according to any one of claims 1 to 7,
Wherein the battery module includes a plurality of battery modules, and the battery module is electrically connected to an adjacent battery module through an external bus bar to form a middle or large battery module.
9. The method of claim 8,
Wherein the external bus bar comprises a bus bar protection member made of a plastic material.
10. The method of claim 9,
Wherein the bus bar protecting member includes an upper bus bar protecting member and a lower bus bar protecting member.
9. The method of claim 8,
Wherein the middle- or large-sized battery module further comprises an air blocking member positioned between the battery modules.
12. The method of claim 11,
Wherein the air blocking member includes an air blocking pad, an upper cover blocking member, and a lower cover blocking member, wherein the air blocking pad is positioned between the upper cover blocking member and the lower cover blocking member.

Images