Title of invention: battery module, battery pack including such battery module, and vehicle including such battery pack
Technical field
[One]
The present invention relates to a battery module, a battery pack including such a battery module, and a vehicle including such a battery pack.
[2]
This application is an application for claiming priority for Korean Patent Application No. 10-2018-0109835 filed on September 13, 2018, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
Background
[3]
Secondary batteries with high ease of application and high energy density according to product group are not only portable devices, but also electric vehicles (EVs) or hybrid vehicles (HEVs) driven by electric drive sources. It is universally applied. Such a secondary battery is attracting attention as a new energy source for eco-friendly and energy efficiency enhancement in that it does not generate by-products from the use of energy as well as the primary advantage that it can dramatically reduce the use of fossil fuels.
[4]
Types of rechargeable batteries currently widely used include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydride batteries, and nickel zinc batteries. The operating voltage of such a unit secondary battery cell, that is, a unit battery cell, is about 2.5V to 4.5V. Therefore, when a higher output voltage is required, a battery pack may be configured by connecting a plurality of battery cells in series. In addition, a battery pack may be configured by connecting a plurality of battery cells in parallel according to the charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack may be variously set according to a required output voltage or charge/discharge capacity.
[5]
On the other hand, when configuring a battery pack by connecting a plurality of battery cells in series/parallel, a battery module including at least one battery cell is first configured, and other components are added using at least one battery module. It is common to construct a battery pack.
[6]
In the case of such a conventional battery module or battery pack, in recent years, as the capacity and output of the battery are gradually increased, there is a trend to require better cooling performance. To this end, in recent years, in the case of a battery cell, for example, a pouch-type secondary battery, the total length of the pouch-type secondary battery is increasing in order to increase energy.
[7]
However, as the overall length of the pouch-type secondary battery increases, there is a problem in that the temperature deviation inside the battery cell increases. In addition, there is a problem in that a portion near the electrode lead has a higher temperature locally than a portion where the electrode lead is not close due to heat generation on the electrode lead side of the pouch-type secondary battery.
[8]
Therefore, when the battery module or battery pack is cooled, there is a need to find a way to improve the cooling temperature deviation of the battery cell.
Detailed description of the invention
Technical challenge
[9]
Accordingly, an object of the present invention is to provide a battery module capable of improving the cooling temperature deviation of a battery cell, a battery pack including the battery module, and a vehicle including the battery pack.
Means of solving the task
[10]
In order to solve the above object, the present invention provides a battery module, comprising: at least one battery cell; A bus bar assembly connected to the electrode leads of the at least one battery cell and provided on both sides of the at least one battery cell; And a heat sink assembly that directly contacts the at least one battery cell and the bus bar assembly while surrounding the at least one battery cell and the bus bar assembly.
[11]
The bus bar assembly may include a bus bar housing mounted on both sides of the at least one battery cell; A connection bus bar provided in the bus bar housing and in contact with an electrode lead of the at least one battery cell; And a heat transfer member guiding the connection of the connection bus bar or the electrode lead to the heat sink assembly.
[12]
The heat transfer member may be mounted on the connection bus bar, and may directly contact the connection bus bar and the heat sink assembly.
[13]
The heat transfer member may be formed of a thermal interface material.
[14]
The heat sink assembly may include: a lower heat sink covering a lower side of the at least one battery cell and the bus bar assembly; An upper heat sink disposed opposite the lower heat sink and covering an upper side of the at least one battery cell and the bus bar assembly; And a pair of side heat sinks that connect the upper heat sink and the lower heat sink and cover both sides of the bus bar assembly.
[15]
The lower heat sink is connected to a cooling water supply unit that supplies cooling water from the outside, and an internal flow path through which the cooling water can flow is provided, and the upper heat sink is connected to a cooling water discharge unit that discharges the cooling water to the outside. And, an internal flow path through which the cooling water can flow may be provided therein.
[16]
Each of the pair of side heat sinks may include internal flow paths that communicate with internal flow paths of the lower heat sink and the upper heat sink.
[17]
The coolant supplied from the coolant supply unit may flow along an inner flow path of the lower heat sink, the pair of side heat sinks, and the upper heat sink and then be discharged to the coolant discharge unit.
[18]
In addition, the present invention, a battery pack, at least one battery module according to the above-described embodiments; And a pack case that packages the at least one battery module.
[19]
In addition, the present invention provides a vehicle, comprising: at least one battery pack according to the above-described embodiment.
Effects of the Invention
[20]
According to various embodiments as described above, a battery module capable of improving a cooling temperature deviation of a battery cell, a battery pack including the battery module, and a vehicle including the battery pack may be provided.
Brief description of the drawing
[21]
The following drawings appended to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of ​​the present invention together with the detailed description of the present invention, which will be described later. It is limited only to and should not be interpreted.
[22]
1 is a view for explaining a battery module according to an embodiment of the present invention.
[23]
2 is a diagram illustrating a bus bar assembly of the battery module of FIG. 1.
[24]
3 is a diagram illustrating a heat sink assembly of the battery module of FIG. 1.
[25]
FIG. 4 is a diagram illustrating a heat transfer path and a flow of coolant in the battery module of FIG. 1.
[26]
5 is a diagram illustrating a battery pack according to an embodiment of the present invention.
[27]
6 is a view for explaining a vehicle according to an embodiment of the present invention.
Mode for carrying out the invention
[28]
The present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. The embodiments described herein are illustratively shown to aid understanding of the invention, and it should be understood that the present invention can be implemented with various modifications different from the embodiments described herein. In addition, in order to aid understanding of the invention, the accompanying drawings are not drawn to scale, but dimensions of some components may be exaggerated.
[29]
1 is a view for explaining a battery module according to an embodiment of the present invention, Figure 2 is a view for explaining the bus bar assembly of the battery module of Figure 1, Figure 3 is a heat sink of the battery module of Figure 1 It is a drawing for explaining an assembly.
[30]
1 to 3, the battery module 10 may include a battery cell 100, a bus bar assembly 200, and a heat sink assembly 300.
[31]
The battery cell 100 is a secondary battery, and may be provided as a pouch-type secondary battery, a prismatic secondary battery, or a cylindrical secondary battery. Hereinafter, in the present exemplary embodiment, the battery cell 100 is limited to being provided as a pouch-type secondary battery.
[32]
The battery cells 100 may be provided in a plurality of at least one or more. When a plurality of battery cells 100 are provided, the plurality of battery cells 100 may be electrically connected to each other.
[33]
The bus bar assembly 200 is connected to the electrode lead 150 of the at least one battery cell 100 and may be provided on both sides of the at least one battery cell 100.
[34]
The bus bar assembly 200 may include a bus bar housing 210, a connection bus bar 230, and a heat transfer member 250.
[35]
The bus bar housing 210 is mounted on both sides of the at least one battery cell 100 and may cover both sides of the at least one battery cell 100. The bus bar housing 210 may have a size capable of covering both sides of the at least one battery cell 100.
[36]
The connection bus bar 230 is provided in the bus bar housing 210 and may contact the at least one electrode lead 150 for electrical connection with the at least one battery cell 100. The connection busbar 230 may be fixed to each other through the at least one electrode lead 150 and laser welding.
[37]
The heat transfer member 250 may guide the connection of the connection bus bar 230 or the electrode lead 150 to the heat sink assembly 300 to be described later. Specifically, the heat transfer member 250 is mounted on the connection bus bar 230, and may directly contact the connection bus bar 230 and the heat sink assembly 300, respectively. The heat transfer member 250 may be formed of a thermal interface material having high heat transfer efficiency.
[38]
The heat sink assembly 300 is directly attached to the at least one battery cell 100 and the bus bar assembly 200 while surrounding the at least one battery cell 100 and the bus bar assembly 200. Can be contacted.
[39]
In the present embodiment, since the heat sink assembly 300 covers the at least one battery cell 100 and the bus bar assembly 200, components such as a separate module case may be omitted.
[40]
Accordingly, in the present embodiment, the battery module 10 having a slimmer and more compact structure can be implemented by omitting components such as the separate module case.
[41]
Hereinafter, the heat sink assembly 300 will be described in more detail.
[42]
The heat sink assembly 300 may include a lower heat sink 310, an upper heat sink 330, and a side heat sink 350.
[43]
The lower heat sink 310 may cover the at least one battery cell 100 and a lower side of the bus bar assembly 200.
[44]
The lower sink 310 is connected to the cooling water supply unit 400 for supplying cooling water from the outside, and an internal flow path 315 through which the cooling water can flow may be provided.
[45]
The upper heat sink 330 is disposed opposite to the lower heat sink 310 and may cover the at least one battery cell 100 and an upper side of the bus bar assembly 200.
[46]
The upper heat sink 330 may be connected to a cooling water discharge unit 500 for discharging the cooling water to the outside, and an internal flow path 335 through which the cooling water may flow may be provided.
[47]
The side heat sinks 350 may be provided as a pair. The pair of side heat sinks 350 may connect the upper heat sink 330 and the lower heat sink 310 and cover both sides of the busbar assembly 200.
[48]
Each of the pair of side heat sinks 350 may be provided with an inner passage 355 communicating with inner passages 315 and 335 of the lower heat sink 310 and the upper heat sink 330. have.
[49]
Hereinafter, the heat transfer path and the cooling water flow of the battery module 10 according to the present embodiment will be described in more detail.
[50]
FIG. 4 is a diagram illustrating a heat transfer path and a flow of coolant in the battery module of FIG. 1.
[51]
Referring to FIG. 4, when the at least one battery cell 100 generates heat, heat generated in the upper and lower sides of the at least one battery cell 100 is the lower heat sink 310 of the heat sink assembly 300. ) And the upper heat sink 330. The lower heat sink 310 and the upper heat sink 330 may cool the upper and lower sides of the at least one battery cell 100 according to the flow of internal cooling water.
[52]
In addition, heat generated from both sides of the at least one battery cell 100, that is, at the side of the electrode lead 150 and the connection bus bar 230 of the bus bar assembly 200, is generated from the heat sink assembly 300. ) May be transmitted to the side of the pair of side heat sinks 350.
[53]
Here, the heat transfer member 250 of the bus bar assembly 200 includes the pair of heat generated at the side of the electrode lead 150 and the connection bus bar 230 of the at least one battery cell 100. Heat transfer to the side heat sink 350 may be accelerated more quickly.
[54]
The pair of side heat sinks 350 may cool portions of the electrode leads 150 and the connection busbar 230 of the at least one battery cell 100 according to the flow of internal cooling water.
[55]
In summary, the cooling water supplied from the cooling water supply unit 400 is the internal flow path 315 of the lower heat sink 310 and the interior of the pair of side heat sinks 350. After flowing along the flow path 355 and the inner flow path 335 of the upper heat sink 330, it may be discharged toward the cooling water discharge part 500.
[56]
In this embodiment, the electrode lead 150 and the connection bus bar 230 of the at least one battery cell 100 through the pair of side heat sinks 350 in contact with the bus bar assembly 200. ) Can effectively reduce the heat generated from the side. In addition, the cooling efficiency may be further improved through the heat transfer member 250 in direct contact with the pair of side heat sinks 350.
[57]
As such, in this embodiment, a portion close to the electrode lead 150 due to heat generation on the electrode lead 150 side of the at least one battery cell 100 through the pair of side heat sinks 350 It is possible to effectively prevent the cooling deviation of the at least one battery cell 100 caused by a locally higher temperature than the other part.
[58]
Therefore, in the present embodiment, the at least one battery cell through the heat sink assembly 300 including the heat transfer member 250 of the bus bar assembly 200 and the pair of side heat sinks 350 It is possible to significantly improve the cooling temperature deviation that may occur during the cooling of (100).
[59]
5 is a view for explaining a battery pack according to an embodiment of the present invention, Figure 6 is a view for explaining a vehicle according to an embodiment of the present invention.
[60]
5 and 6, the battery pack 1 includes at least one battery module 10 according to the preceding embodiment and a pack case 50 for packaging the at least one battery module 10. I can.
[61]
The battery pack 1 may be provided in the vehicle V as a fuel source for the vehicle V. For example, the battery pack 1 may be provided in the vehicle V in an electric vehicle, a hybrid vehicle, and other ways in which the battery pack 1 can be used as a fuel source.
[62]
In addition, it goes without saying that the battery pack 1 may be provided in other devices, devices, and facilities, such as an energy storage system using a secondary battery in addition to the vehicle V.
[63]
As described above, the battery pack 1 according to the present embodiment and the apparatus, apparatus and equipment including the battery pack 1 such as the vehicle V include the battery module 10 described above, A battery pack 1 having all of the advantages due to one battery module 10 and a device, apparatus, and equipment such as a vehicle V including the battery pack 1 can be implemented.
[64]
According to various embodiments as described above, the battery module 10 capable of improving the cooling temperature deviation of the battery cell 100, the battery pack 1 including the battery module 10, and such The vehicle V including the battery pack 1 may be provided.
[65]
In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications may be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or prospect of the present invention.
Claims
[Claim 1]
A battery module, comprising: at least one battery cell; A bus bar assembly connected to the electrode leads of the at least one battery cell and provided on both sides of the at least one battery cell; And a heat sink assembly surrounding the at least one battery cell and the bus bar assembly and directly contacting the at least one battery cell and the bus bar assembly.
[Claim 2]
According to claim 1, The bus bar assembly, Bus bar housing mounted on both sides of the at least one battery cell; A connection bus bar provided in the bus bar housing and in contact with an electrode lead of the at least one battery cell; And a heat transfer member for guiding the connection of the connection bus bar or the electrode lead to the heat sink assembly.
[Claim 3]
The battery module of claim 2, wherein the heat transfer member is mounted on the connection bus bar and directly contacts the connection bus bar and the heat sink assembly.
[Claim 4]
The battery module of claim 2, wherein the heat transfer member is made of a thermal interface material.
[Claim 5]
The apparatus of claim 1, wherein the heat sink assembly comprises: a lower heat sink covering a lower side of the at least one battery cell and the bus bar assembly; An upper heat sink disposed opposite the lower heat sink and covering an upper side of the at least one battery cell and the bus bar assembly; And a pair of side heat sinks connecting the upper heat sink and the lower heat sink and covering both sides of the bus bar assembly.
[Claim 6]
The method of claim 5, wherein the lower heat sink is connected to a cooling water supply unit for supplying cooling water from the outside, and an internal flow path through which the cooling water can flow is provided, and the upper heat sink includes the cooling water to the outside. The battery module, characterized in that it is connected to the discharged cooling water discharge unit, and an internal flow path through which the cooling water can flow.
[Claim 7]
The battery module of claim 6, wherein each of the pair of side heat sinks includes internal flow paths communicating with internal flow paths of the lower heat sink and the upper heat sink.
[Claim 8]
The method of claim 7, wherein the cooling water supplied from the cooling water supply unit flows along an inner flow path of the lower heat sink, the pair of side heat sinks, and the upper heat sink, and then is discharged to the cooling water discharge unit. Battery module.
[Claim 9]
At least one battery module according to claim 1; And a pack case for packaging the at least one battery module.
[Claim 10]
At least one battery pack according to claim 9; A vehicle comprising a.