WO2014104566A1

WO2014104566A1 - Battery case, and battery pack including same

Info

Publication number: WO2014104566A1
Application number: PCT/KR2013/010126
Authority: WO
Inventors: 황재일; 차현기; 박성철
Original assignee: 에스케이이노베이션 주식회사
Priority date: 2012-12-27
Filing date: 2013-11-08
Publication date: 2014-07-03
Also published as: KR101986083B1; KR20140084570A

Abstract

The present invention relates to a battery case and to a battery pack including same, and more particularly, to a battery case having a structure in which occurrences of leakage therein can be confirmed with the naked eye from the outside of said case, and to a battery pack including same.

Description

Battery case and battery pack including same

The present invention relates to a battery case and a battery pack including the same. More particularly, the present invention relates to a battery case having a structure that can be visually checked from the outside when a leak occurs in the battery case and a battery pack including the same.

In general, an electric vehicle, unlike an internal combustion engine vehicle that uses gasoline or diesel, rotates an electric motor using electric energy such as a secondary battery to drive wheels.

Therefore, in order to prevent air pollution due to harmful components of internal combustion engine cars, electric vehicles, which are pollution-free cars, have attracted attention recently.

In practice, a secondary battery having high performance such as high energy density, high power density, long life, and weight reduction is essential for driving an electric vehicle. To this end, lead secondary batteries, lithium secondary batteries, alkali secondary batteries, metal-air secondary batteries, fuel secondary batteries, and the like are being developed or used.

On the other hand, since one secondary battery lacks its performance, a plurality of secondary batteries are connected in series to generate a voltage of about several hundred volts. The secondary battery is usually fixed and mounted to the secondary battery of the terminal of the positive electrode and the negative terminal, and a number of secondary batteries are put into a single tray and used.

Secondary batteries used in automobiles are easily exposed to moisture or contaminants due to the nature of the use environment, and are stored and fixed in the battery case. However, when the water fills the bottom of the case due to excessive condensation in the battery case or water leakage of the water-cooled refrigerant, the secondary battery stored in the battery case may be exposed to moisture and cause a short circuit or malfunction. In particular, since the state inside the battery case cannot be visually checked from the outside, there is a problem in that leakage can be confirmed after the operation stop or malfunction of the secondary battery occurs. In this case, the secondary battery may be exposed to moisture for a long time to shorten the life of the secondary battery and may reach an unusable state in severe cases.

Therefore, it is required to develop a case configured to visually check the situation inside the case from the outside, in particular, excessive condensation or leakage of the water-cooled refrigerant.

The present invention has been made to solve the above problems, an object of the present invention is to form a side of the battery case penetrating, provided with a transparent window in the penetrating to provide a battery case that can be checked inside the battery case from the outside. Is in.

In particular, the periphery of the transparent window is wrapped with an elastic material to be installed in the case to provide a battery case that prevents leakage due to the durability and the transparent window of the transparent window.

The battery case of the present invention includes a battery case accommodating a battery unit, wherein the battery case comprises: a through hole formed through the case at a lower side of the case; And a transparent part sealing the through hole and made of a transparent material. It includes.

At this time, the transparent portion, a transparent window of a transparent material; And a rubber part surrounding the circumference of the transparent window and made of an elastic material. It consists of.

The rubber part may have an annular shape such that the transparent window is fitted to an inner circumferential surface thereof, and an inner circumferential surface of the rubber part may have an outer circumferential surface of the transparent window inserted thereinto; It is formed in a closed curve along the inner peripheral surface of the rubber portion.

The transparent part may include a holder part having a rubber part accommodating space so that the rubber part outer circumferential surface is fitted and protruding outward from the case around the through hole; And a cover which is in close contact with the outer surface of the holder to prevent the rubber from being separated when the rubber is inserted into the holder. It further includes.

In addition, the battery case, a water-cooled cooling module disposed adjacent to the battery unit for heat exchange of the battery unit; It includes more.

The battery pack including the battery case of the present invention, the battery case described above; A battery unit accommodated in the battery case; It includes.

The battery case of the present invention according to the above configuration, the inside of the case can be checked with the naked eye from the outside, there is an effect that can be followed up after early confirmation when excessive condensation occurs or the water-cooled refrigerant leaks inside the battery case. Therefore, the secondary battery is prevented from being exposed to moisture for a long time, and there is an effect of preventing serious damage to the secondary battery.

1 is an exploded perspective view of a case according to an embodiment of the present invention;

Figure 2 is an exploded perspective view of the transparent portion according to an embodiment of the present invention

FIG. 3 is a sectional view taken along line AA ′ of FIG. 1 (transparent section)

100: battery case

110: upper case

120: lower case 125: through hole

150: water cooling cooling module 151: heat exchange unit

152: cooling water pipe

200: transparent part

210: holder 211: rubber portion receiving space

220: rubber part 221: transparent window insertion groove

230: transparent window

240: cover 241: cover hole

Hereinafter, a battery case according to various embodiments of the present disclosure as described above will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a battery case 100 according to an embodiment of the present invention. Referring to FIG. 1, the battery case 100 includes an upper case 110, a lower case 120, a water cooling cooling module 150, and a transparent portion 200.

The lower case 120 is formed on a housing in which a battery unit storage space is formed. The lower case 120 has an upper shape to facilitate replacement of the battery unit. The open surface of the lower case 120 is sealed through the coupling with the upper case 110. The lower case 120 has a second flange 120a and a second coupling hole 121 to be coupled to the upper case 110. The second flange 120a extends outward along the upper circumference of the lower case 120. The second coupling hole 121 penetrates up and down on the second flange 120a. A plurality of second coupling holes 121 may be formed along the second flange 120a at a predetermined distance.

The upper case 110 may be formed in an enclosure or plate-shaped so that the upper side of the battery unit is accommodated therein. The upper case 110 has an open lower portion, and is configured to seal the upper open surface of the lower case 120. The upper case 110 is formed with a first flange 110a and a first coupling hole 111 for coupling with the lower case 120. The first flange 110a is formed outward along a lower circumference of the upper case 110. The first coupling hole 111 is formed to penetrate up and down on the first flange 110a to correspond to the second coupling hole 121. A plurality of first coupling holes 111 may be spaced apart from each other by a predetermined distance along the first flange 110a.

Therefore, the upper case 110 and the lower case 120 may be screwed or bolted through the first and second coupling holes 111 and 112. At this time, the gasket is inserted into the coupling surface of the upper case 110 and the lower case 120, or may be bonded after the silicon (Silicon sealant) treatment.

The lower case 120 may accommodate the water-cooled cooling module 150. The water-cooled cooling module 150 is configured to cool the battery unit accommodated in the case 100 through the coolant when the battery unit is overheated. Accordingly, the water-cooled cooling module 150 has a coolant flowing therein, a heat exchanger 151 disposed adjacent to the battery unit to exchange heat with the battery unit, and a coolant pipe 152 for supplying and discharging the coolant to the heat exchanger 151. It can be composed of).

The transparent part 200 is provided at the lower side of the lower case 120. The transparent part 200 is made of a transparent material so that the inside of the case 100 can be checked with the naked eye. If the coolant flowing through the water-cooled cooling module 150 leaks and accumulates on the bottom surface of the lower case 120, it is confirmed early. It may be configured to enable. Therefore, by early checking that the cooling water of the water-cooled cooling module 150 is leaked through the transparent part 200, and following up, the damage of the battery unit can be minimized.

Hereinafter, a detailed configuration of the transparent part 200 will be described in detail with reference to the drawings. 2 is an exploded perspective view of the transparent part 200 according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the transparent part 200 is shown. As shown in the drawing, the transparent part 200 includes a holder part 210, a rubber part 220, a transparent window 230, and a cover 240.

The holder 210 is formed in the through hole 125 formed through the lower side of the lower case 120. The holder part 210 protrudes outward from the lower case 120 around the through hole 125. The holder part 210 is formed with a rubber part accommodating space 211 to accommodate the rubber part 220 therein. The inner diameter of the holder portion 210 may be larger than the diameter of the through hole 125.

The rubber part 220 protects the transparent window 230 from impact and is configured for sealing the transparent window 230 and the through hole 125. Therefore, the rubber part 220 may be made of an elastic material. The rubber part 220 is formed in an annular shape with a thickness so that the circumference of the transparent window 230 is fitted to the inner circumferential surface. In this case, a transparent window insertion groove 221 is formed on the inner circumferential surface of the rubber part 220 so that the outer circumferential surface of the transparent window 230 is fitted. Through the transparent window insertion groove 221, the transparent window 230 is configured such that the outer periphery of the case and the inner periphery of the case are wrapped through the rubber part 220. That is, the transparent window 230 may be mounted on the lower case 120 so that the elastic force is equal to both the load from the outside of the case 100 and the load from the inside of the case 100.

The transparent window 230 may be applied with a conventional transparent material so that the inside of the case 100 can be visually checked from the outside of the case 100. For example, glass, transparent plastic, or the like may be applied.

A protruding outer surface of the holder 210 is provided with a cover 240 to seal the holder 210. The cover 240 has a plate shape and a cover hole 241 penetrates through the center thereof. The cover 240 may have an outer diameter larger than an outer circumferential surface of the rubber part 220 so as to prevent separation of the rubber part 220 fitted into the holder 210, and the inner diameter may be smaller than the outer diameter of the rubber part 220. have.

The technical spirit should not be interpreted as being limited to the above embodiments of the present invention. Various modifications may be made at the level of those skilled in the art without departing from the spirit of the invention as claimed in the claims. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims

A battery case for accommodating a battery unit,

The battery case,

A through hole formed through the case at a lower side of the case; And

A transparent part sealing the through hole and made of a transparent material;

Including, the battery case.
The method of claim 1,

The transparent portion,

Transparent window of transparent material; And

A rubber part wrapped around the transparent window and made of an elastic material;

Composed of, battery case.
The method of claim 2,

The rubber part,

It is annular to fit the transparent window on the inner circumferential surface,

An inner circumferential surface of the rubber part so that an outer circumferential surface of the transparent window is inserted into the rubber window; The battery case is formed in a closed curve along the inner peripheral surface of the rubber portion.
The method of claim 2,

The transparent portion,

A holder part formed with a rubber part accommodating space so that the rubber part outer circumferential surface is fitted and protruding outwardly from the case around the through hole; And

A cover which is in close contact with an outer surface of the holder part to prevent the rubber part from being separated when the rubber part is inserted into the holder part;

The battery case further comprising.
The method of claim 1,

The battery case,

A water cooling cooling module disposed adjacent to the battery unit for heat exchange of the battery unit;

To further include, the battery case.
A battery case according to any one of claims 1 to 5; And

A battery unit accommodated in the battery case;

Includes, a battery pack comprising a battery case.