KR101853907B1 - Battery module and battery pack including the same - Google Patents

Abstract

Disclosed are a battery module and a battery pack including the same. According to an embodiment of the present invention, the battery module comprises: a cell cartridge supporting a plurality of battery cells for stacking the plurality of battery cells reciprocally; and a water jacket detachably coupled to the cell cartridge, having a flow path through which a fluid for cooling the battery cell flows, and coming in contact with each of the neighboring battery cells so as to cool the same. According to the present invention, it is possible to easily replace the water jacket.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery module,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery module and a battery pack including the same, and more particularly, to a battery module and a battery pack including the battery module.

BACKGROUND OF THE INVENTION In the modern world, batteries are widely used in portable electronic products such as notebook computers, cameras, mobile phones, MP3 players, and the like, as well as various devices such as automobiles, robots, and satellites. The battery can be divided into a primary battery and a secondary battery. Among them, the secondary battery is widely used because it has a great advantage in terms of being capable of storing energy and also capable of repeated charge and discharge.

The secondary rechargeable batteries are nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel- It is very popular because of its low self-discharge rate and high energy density.

The lithium secondary battery includes an electrode assembly in which a lithium-based oxide and a carbonaceous material are used as a cathode active material and an anode active material, respectively, and in which a positive electrode plate and a negative electrode plate coated with a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, And an outer casing for sealingly accommodating the outer casing. Here, the positive electrode active material and the negative electrode active material are divided into a lithium ion battery (LIB), a lithium polymer battery (Polymer Lithium Ion Battery) and the like depending on which one is used. Typically, the electrodes of these lithium secondary batteries are formed by applying a positive electrode or a negative electrode active material to a current collector such as aluminum, copper sheet, mesh, film, or foil, followed by drying.

In addition, although one battery cell may be used alone in a secondary battery, a plurality of battery cells may be used in series and / or parallelly connected with each other in one battery system, thereby outputting a higher power, It can store large energy. Particularly, as the carbon energy is gradually depleted and the interest in the environment is increasing recently, the battery system using the secondary battery is increasingly used in large-sized equipment. And, since the battery system used for large-sized equipment requires high output and / or large capacity, a plurality of battery cells are used in series and / or parallel connection.

Here, when a plurality of battery cells are connected in series and / or in parallel, heat is generated, and heat dissipation of the battery that discharges the generated heat is required. However, in the related art, since the cooling plate or the like for cooling the battery cell is fixed to the cartridge, if the cooling plate is damaged, it is necessary to replace the entire cart support and the cooling plate, .

Korean Patent Publication No. 10-2015-0025225 (Publication date: March 10, 2015)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a battery module in which a water jacket formed with a flow path for cooling can be easily replaced, and a battery pack including the battery module.

It is another object of the present invention to provide a battery module and a battery pack including the battery module, which can reduce the replacement cost because only the water jacket can be attached and detached without replacing the cartridge.

It is another object of the present invention to provide a battery module and a battery pack including the battery module, which can prevent the amount of fluid moving to the flow path of the water jacket disposed at the rear relative to the traveling direction of the fluid.

According to an aspect of the present invention, there is provided a battery pack comprising: a cell cartridge supporting the plurality of battery cells to stack a plurality of battery cells; And a water jacket detachably coupled to the cell cartridge, the water jacket contacting the neighboring battery cells to cool the battery cells, wherein a flow path for moving fluid for cooling the battery cells is formed, Can be provided.

In addition, the cell cartridge may include an outer frame formed with a hollow, and the outer frame may have an insertion groove into which the water jacket can be inserted.

The outer frame may have a guide portion for guiding the water jacket when the water jacket is inserted.

In addition, the outer frame may be formed with a support portion to which the water jacket can be fitted and supported.

The water jacket may have a first coupling groove or a first coupling protrusion, and the cell cartridge may have a second coupling protrusion or a second coupling groove corresponding to the first coupling groove or the first coupling protrusion, respectively .

The water jacket includes at least three battery cells and a plurality of water jackets interposed between the plurality of battery cells. The water jacket has an inlet hole communicating with the flow channel to supply the fluid to the flow channel of the water jacket. absence; And a discharge member having an outflow hole communicating with the flow path so that the fluid moved to the flow path is discharged from the flow path, wherein the supply member is disposed rearward A plurality of pipes may be provided to compensate for the reduction in the amount of fluid moving to the water jackets.

The plurality of pipes may include an outer pipe through which the first fluid moves; And an inner tube disposed inside the outer tube, in which the second fluid moves, wherein at least one opening is formed.

In addition, the end of the inner tube can be opened so that the second fluid can move from the inner tube to the outer tube.

According to another aspect of the present invention, there is provided a battery pack including the battery module described above, and further, an automobile including the battery module may be provided.

In the embodiments of the present invention, the water jacket formed with the channel for cooling can be detachably coupled to the cell cartridge, thereby facilitating the replacement of the water jacket.

It is another object of the present invention to provide a battery module and a battery pack including the battery module, in which only the water jacket can be attached and detached without replacing the cartridge, so that the replacement cost can be reduced because the cartridge can be used continuously without being discarded.

Further, the outer tube and the inner tube are constructed with a double tube structure, thereby reducing the amount of fluid moving to the flow path of the water jacket disposed rearward with respect to the traveling direction of the fluid.

1 is an exploded perspective view of a battery module according to an embodiment of the present invention.
2 is a perspective view illustrating a state in which a cell cartridge and a water jacket are separated from each other in a battery module according to an embodiment of the present invention.
3 is a bottom view of a cell cartridge in which an insertion groove is formed in a battery module according to an embodiment of the present invention.
4 is a perspective view of a battery module according to an embodiment of the present invention in which a water jacket is coupled to a cell cartridge.
5 is a perspective view illustrating a water jacket and an adhesive member in a battery module according to an embodiment of the present invention.
6 is a perspective view illustrating a cell cartridge and a battery cell to which a water jacket is coupled in a battery module according to an embodiment of the present invention.
7 is a side view of a plurality of battery cells in which a cover is detached from a battery module according to an embodiment of the present invention.
8 is a cross-sectional view and partial enlarged view of a supply member in a battery module according to an embodiment of the present invention.
9 is a cross-sectional view and a partially enlarged view of an inner tube in a battery module according to an embodiment of the present invention.
10 (a) and 10 (b) are side cross-sectional views of one embodiment of a bushing member coupled to a water jacket in a battery module according to an embodiment of the present invention.
11 (a) and 11 (b) are side cross-sectional views of another embodiment of a bushing member coupled to a water jacket in a battery module according to an embodiment of the present invention.
12 is a cross-sectional view of a state in which the supply member is engaged with the bushing member of Figs. 11 (a) and 11 (b).

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to the description, terms and words used in the description and claims of the present specification should not be construed as limited to ordinary or dictionary terms, and the inventors shall, in order to explain their invention in the best possible way, It should be construed as meaning and concept consistent with the technical idea of the present invention based on the principle that the concept of the present invention can be properly defined. Accordingly, the embodiments described herein and the arrangements shown in the drawings are but a few of the most preferred exemplary embodiments of the present invention and are not intended to represent all of the inventive concepts of the present invention, It should be understood that various equivalents and modifications may be present.

In the drawings, the size of each element or a specific part constituting the element is exaggerated, omitted or schematically shown for convenience and clarity of description. Therefore, the size of each component does not entirely reflect the actual size. In the following description, it is to be understood that the detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The term " bond " or " connection, " as used herein, is intended to encompass a case in which one member and another member are directly or indirectly connected, And the like.

FIG. 1 is a perspective view of a battery module according to an embodiment of the present invention, FIG. 2 is a perspective view of a cell cartridge and a water jacket separated from each other in a battery module according to an embodiment of the present invention, FIG. 4 is a perspective view illustrating a state where a water jacket is coupled to a cell cartridge in a battery module according to an embodiment of the present invention, and FIG. 5 is a perspective view 6 is a perspective view showing a cell cartridge and a battery cell in which a water jacket is coupled in a battery module according to an embodiment of the present invention. FIG. 6 is a perspective view showing a water jacket and a battery cell in a battery module according to an embodiment of the present invention. to be.

Referring to FIGS. 1 to 6, a battery module 10 according to an embodiment of the present invention includes a cell cartridge 200 and a water jacket 300.

The cell cartridge 200 supports at least one battery cell 100 to stack a plurality of battery cells 100 therebetween. Here, a plurality of cell cartridges 200 may be provided. The battery cell 100 may include a positive electrode plate, a separator, a negative electrode plate, an active material, an electrolytic solution, an aluminum thin film layer, etc., and may be charged / discharged by electrochemical reaction between the components. The plurality of battery cells 100 may be arranged in various ways and connected to each other in various ways such as, for example, serial, parallel, serial and parallel. In this manner, the cell cartridge 200 supports the plurality of battery cells 100 to interconnect the plurality of battery cells 100. Each of the battery cells 100 may be housed in the cell cartridge 200, or simply contacted and supported. A cartridge assembly having a plurality of cell cartridges 200 may be provided.

The cell cartridge 200 may be manufactured by injection molding of plastic, and a plurality of cell cartridges 200 may be stacked while supporting the battery cells 100. The cell cartridge 200 is accommodated in the case 700 and the battery cells 100 supported by the cell cartridge 200 can be received and protected inside the case 700. [

The cell cartridge 200 may be provided with a connector element (not shown) or a terminal element (not shown). The connector element (not shown) may include various types of electrical connection parts or connections (not shown) to be connected to a BMS (Battery Management System, not shown) that can provide data on the voltage or temperature of the battery cell 100, Member may be included. The terminal element (not shown) includes a positive electrode terminal and a negative electrode terminal as main terminals connected to the battery cell 100, and a terminal element (not shown) may be electrically connected to the outside with a terminal bolt.

The cell cartridge 200 may be detachably coupled to the water jacket 300 for cooling the battery cells 100 as will be described later. The outer frame 210 may be provided with an insertion groove 211 (see FIGS. 2 and 3). 3, the insertion grooves 211 are formed on the lower side of the cell cartridge 200, but the present invention is not limited thereto. The insertion grooves 211 may be formed in various portions of the cell cartridge 200.

The water jacket 300 is formed with a fluid 600 for cooling the battery cell 100, for example, a flow path 360 through which water flows. The water jacket 300 is in contact with neighboring battery cells 100, (100). 5, the water jacket 300 can be manufactured by coupling the first member 310 and the second member 320 having the flow path 360 formed therebetween by an adhesive member 330. FIG. As described above, when the water jacket 300 is coupled through the adhesive member 330, it is easier to manufacture and cost-saving than the laser welding method.

The water jacket 300 may be detachably coupled to the cell cartridge 200. [ That is, in the state where the water jacket 300 is coupled to the cell cartridge 200, the fluid 600 such as water flows through the channel 360 formed in the water jacket 300 and is in contact with the water jacket 300 Thereby cooling the battery cells 100.

The water jacket 300 is detachable through the insertion groove 211 formed in the outer frame 210 of the cell cartridge 200. When the water jacket 300 is inserted through the insertion groove 211, As shown in FIG. A guide part 212 may be formed on the outer frame 210 to guide the movement of the water jacket 300 in the process of inserting the water jacket 300 through the insertion groove 211. That is, the guide part 212 smoothly moves the water jacket 300. 2, when the insertion grooves 211 are formed on the lower side of the cell cartridge 200, the guide portions 212 may be formed on both sides of the cell cartridge 200 as a pair. However, the number and position are not limited thereto. The guide part 212 may include a guide groove through which the water jacket 300 can move. That is, the water jacket 300 can move along the guide groove of the guide portion 212. After the insertion of the water jacket 300 is completed, the support frame 213 may be formed on the outer frame 210 to support the water jacket 300. In FIG. 2, the supporting portion 213 is formed on the upper side of the cell cartridge 200, and a fitting groove may be formed so that the water jacket 300 is inserted and fitted. That is, when the insertion of the water jacket 300 is completed, the upper side of the water jacket 300 is inserted into the fitting groove of the supporting portion 213 of the cell cartridge 200 and is retained in its shape. However, the position of the support portion 213 may vary.

The water jacket 300 may have a first coupling groove 370. In this case, the cell cartridge 200 may have a second coupling projection 214 corresponding to the first coupling groove 370 When the water jacket 300 is inserted into the cell cartridge 200, the second engaging protrusion 214 of the cell cartridge 200 is engaged with the first engaging groove 370 of the water jacket 300, (See FIG. 4). The water jacket 300 can be separated from the cell cartridge 200 by releasing the engagement between the first engagement groove 370 of the water jacket 300 and the second engagement projection 214 of the cell cartridge 200 (See Fig. 2). Thereby, the water jacket 300 can be detachably coupled to the cell cartridge 200. A first coupling protrusion (not shown) may be formed in the water jacket 300. In this case, a second coupling groove (not shown) corresponding to the first coupling protrusion (not shown) may be formed in the cell cartridge 200, Can be formed. The two battery cells 100 can be contacted to both sides of the water jacket 300 in a state where the water jacket 300 is inserted into the cell cartridge 200 (see FIG. 6). That is, there is an effect that a plurality of battery cells 100 can be cooled by one water jacket 300.

FIG. 7 is a side view of a plurality of battery cells in which a cover is separated from a battery module according to an embodiment of the present invention, FIG. 8 is a cross-sectional view and a partially enlarged view of a supply member in a battery module according to an embodiment of the present invention, 9 is a cross-sectional view and a partially enlarged view of an inner tube in a battery module according to an embodiment of the present invention.

7 to 9, a battery module 10 according to an embodiment of the present invention includes a supply member 400 for supplying a fluid 600 to a flow path 360 of a water jacket 300, And a discharge member 500 (see FIG. 1) through which the fluid 600 moved to the discharge port 360 is discharged from the flow path 360.

A plurality of water jackets 300 are coupled to the cell cartridge 200 to be interposed between three or more battery cells 100 respectively and the supply member 400 and the discharge member 500 are connected to the plurality of water jackets 300, Respectively. The fluid 600 for cooling the water jacket 300 is supplied from the supply member 400 to the flow channel 360 of the water jacket 300 and flows to the water jacket 300 through the flow channel 360 And may be discharged to the outside through the discharge member 500 from the flow path 360 after cooling the contacted battery cells 100. An inflow hole 411 communicating with the flow path 360 is formed in the supply member 400 and an outflow hole (not shown) communicating with the flow path 360 is formed in the discharge member 500. When the supply member 400 is inserted into the inlet 340 formed in the water jacket 300, the inlet hole 411 of the supply member 400 communicates with the channel 360 of the water jacket 300 2) of the water jacket 300 and an outlet hole (not shown) of the discharge member 500 is inserted into the water channel 360 of the water jacket 300 Can be communicated.

Here, the supply member 400 may include a plurality of pipes for smooth fluid supply. That is, since a high oil pressure is formed in the forward direction with respect to the traveling direction of the fluid 600, the fluid 600 smoothly moves through the oil channel 360 of the water jacket 300 disposed in front, have. However, the hydraulic pressure gradually decreases at the rear side with respect to the traveling direction of the fluid 600, whereby the inflow amount of the fluid 600 is reduced through the fluid channel 360 of the water jacket 300 disposed at the rear, It may happen that the user can not move smoothly. In order to compensate for the amount of fluid behind the fluid 600 with respect to the traveling direction of the fluid 600, the supply member 400 may include a plurality of pipes, for example, a double pipe structure of the outer pipe 410 and the inner pipe 420 have. 8, outer tube 410 is configured to allow first fluid 610 to move and inner tube 420 is disposed inside of outer tube 410 to allow second fluid 620 to move . Here, the first fluid 610 and the second fluid 620 may be the same type or different types. One or more openings 421 may be formed in the inner pipe 420 to allow the second fluid 620 to move from the inner pipe 420 to the outer pipe 410. 8, the opening 421 of the inner pipe 420 may be formed at the center portion with respect to the entire length of the inner pipe 420. [ That is, since the second fluid 620 flowing through the inner pipe 420 moves to the outer pipe 410 through the opening 421 and merges with the first fluid 610, the amount of fluid that can be generated in the outer pipe 410 is reduced Can be prevented. 8, since the end of the inner pipe 420 is not closed but is opened, the second fluid 620, which has moved to the end of the inner pipe 420 through the inner pipe 420, (420) to the exterior (410). The second fluid 620 that has moved to the outer surface 410 through the end of the inner tube 420 flows in a direction opposite to the moving direction of the first fluid 610 through the outer tube 410, And can be moved to the flow path 360. On the other hand, it is obvious that the supply member 400 can be composed of a single pipe rather than a double pipe if necessary.

10 (a) and 10 (b) are side cross-sectional views of one embodiment of a bushing member coupled to a water jacket in a battery module according to an embodiment of the present invention, and Figs. 11 (a) Sectional view of another embodiment of a bushing member coupled to a water jacket in a battery module according to an embodiment of the present invention, Fig. 12 is a cross-sectional side view of a bushing member of Fig. 11 (a) Fig.

5, a bushing member 800 may be coupled to the inlet 340 of the water jacket 300 to facilitate insertion of the supply member 400 and may be coupled to the outlet 350 of the water jacket 300, The bushing member 800 can be coupled to facilitate the insertion of the discharge member 500 also. The bushing member 800 may be coupled to the inlet 340 or the outlet 350 of the water jacket 300 in a variety of ways. 10A and 10B, a pair of bushing members 800a and 800b are coupled to the first member 310 and the second member 320, respectively, When the member 310 and the second member 320 are coupled to each other by the adhesive member 330, a pair of the bushing members 800a and 800b may be provided to be coupled to each other. 11 (a) and 11 (b), one bushing member 800 is interposed between the first member 310 and the second member 320 in the direction in which they face each other, (800) may be inserted. Of course, after one of the bushing members 800 is inserted into the first member 310 and the second member 320 after the first member 310 and the second member 320 are coupled to each other by the adhesive member 330, It may be provided. 12, a plurality of water jackets 300 each having one bushing member 800 may be provided as shown in FIGS. 11 (a) and 11 (b), so that the supply member 400 is connected to the bushing member 800 ). ≪ / RTI >

11 (a), a gasket (not shown) is interposed between the water jacket 300 and the bushing member 800 to prevent water from leaking when assembling the water jacket 300 and the bushing member 800 when the fluid is water 910) may be inserted. Here, the gasket 910 may be made of silicon. 11 (b), the bushing member 800 can be assembled by the washer 920. [ Thereby, the washer 920 provides a predetermined pressure to the bushing member 800, thereby preventing leakage of water from the water jacket 300.

12, the sealing member 930 may be coupled to the washer 920 to prevent water leakage, and the sealing member 930 may be provided with a silicone hose for preventing water leakage. Then, the sealing member 930 can be fixed by a clamp member 940 such as a spring. Here, the spring may have various shapes and materials.

Hereinafter, functions and effects of the battery module 10 according to an embodiment of the present invention will be described.

1 to 6, a water channel 360 is formed in the water jacket 300 and is detachably coupled through an insertion groove 211 formed in the cell cartridge 200. After the water jacket 300 is coupled to the cell cartridge 200, the battery cells 100 are brought into contact with the water jacket 300 and the fluid such as water moving along the channel 360 formed in the water jacket 300 The battery cells 100 can be cooled. As described above, since the water jacket 300 is detachably coupled to the cell cartridge 200, the water jacket 300 can be easily replaced.

7 to 9, a supply member 400 for supplying the fluid 600 to the channel 360 of the water jacket 300 and a supply member 400 for supplying the fluid 600 from the channel 360 of the water jacket 300, The water jacket 300 is inserted into and communicated with the inlet 340 and the outlet 350, respectively. The supply member 400 includes an outer pipe 410 through which the first fluid 610 moves and a second pipe 420 through which the second fluid 620 moves, And one or more openings 421 may be formed in the inner pipe 420 so that the second fluid 620 of the inner pipe 420 can move to the outer pipe 410 through the opening 421 and the inner pipe 420 The second fluid 620 can be moved to the outer tube 410 through the end of the inner tube 420. [ Thereby, it is possible to prevent the amount of the fluid moving to the flow path 360 of the water jacket 300 disposed at the rear from the direction of the flow of the fluid 600 to be reduced.

Meanwhile, a battery pack (not shown) according to an embodiment of the present invention may include at least one battery module 10 according to an embodiment of the present invention as described above. In addition to the battery module 10, the battery pack (not shown) may include a case for housing the battery module 10, various devices for controlling the charging and discharging of the battery module 10, such as BMS, Sensors, fuses, and the like.

A vehicle (not shown) according to an embodiment of the present invention may include the battery module 10 or a battery pack (not shown), and the battery module 10 May be included. The battery module 10 according to an embodiment of the present invention may be applied to a vehicle (not shown) such as an electric vehicle or a hybrid vehicle .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

10: battery module 100: battery cell
200: cell cartridge 210: outer frame
211: insertion groove 212: guide portion
213: support part 214: second engaging projection
220: Hollow 300: Water jacket
310: first member 320: second member
330: Adhesive member 340: Entrance
350: Exit 360: Euro
370: first coupling groove 400: supply member
410: Appearance 411: Inflow hole
420: inner pipe 421: opening
500: exhaust member 600: fluid
610: first fluid 620: second fluid
700: Case 800: Bushing member
910: Gasket 920: Washer
930: sealing member 940: clamp member

Claims (10)

In order to stack a plurality of battery cells, a plurality of cell cartridges for supporting at least one battery cell are provided,
And a water jacket detachably coupled to the cell cartridge, the water jacket being formed with a flow path through which fluid for cooling the battery cell moves, and contacting the battery cells adjacent to each other to cool the battery cells,
The cell cartridge includes an outer frame having a hollow formed therein, an insertion groove into which the water jacket can be inserted is formed in the outer frame,
Wherein the water jacket is inserted into the hollow through the insertion groove of the outer frame, and the battery cells are brought into contact with the water jacket located in the hollow. delete The method according to claim 1,
Wherein the outer frame is formed with a guide portion capable of guiding the water jacket when the water jacket is inserted. The method according to claim 1,
Wherein the outer frame is formed with a support portion to which the water jacket can be fitted and supported. The method according to claim 1,
The water jacket may have a first coupling groove or a first coupling protrusion and the cell cartridge may have a second coupling protrusion or a second coupling groove corresponding to the first coupling groove or the first coupling protrusion, Battery module. The method according to claim 1,
And at least three battery cells and a plurality of water jackets interposed between the plurality of battery cells,
A supply member having an inlet hole communicating with the flow path for supplying the fluid to the flow path of the water jacket; And
And a discharge member having an outflow hole communicating with the flow path so that the fluid moved to the flow path is discharged from the flow path,
Wherein the supply member comprises a plurality of tubes to compensate for a reduction in the amount of fluid moving to the water jackets disposed rearwardly due to a reduction in hydraulic pressure with respect to a direction of travel of the fluid. The method according to claim 6,
The plurality of tubes may include:
An outer surface through which the first fluid moves; And
And an inner tube disposed inside the outer tube to move the second fluid, wherein the inner tube has at least one opening formed therein. 8. The method of claim 7,
And an end of the inner tube is opened so that the second fluid can move from the inner tube to the outer tube. 9. A battery pack comprising the battery module according to any one of claims 1 to 8. 9. A vehicle comprising a battery module according to any one of claims 1 to 8.

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