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. 10-2018-0109838 filed on September 13, 2018, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
Background
[3]
Rechargeable 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]
Meanwhile, 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 more excellent cooling performance. To this end, in recent years, in the case of a battery cell, for example, a pouch-type secondary battery, the overall 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, 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 a cooling temperature deviation of a battery cell when cooling a battery module or a battery pack, a battery pack including the battery module, and a vehicle including the battery pack. will be.
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 at least one heat sink provided on at least one side of the at least one battery cell and the bus bar assembly. And a pair of cooling plates vertically connected to the at least one heat sink and in direct contact with 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 that guides the connection between the connection bus bar and the pair of cooling plates.
[12]
The heat transfer member is mounted on the connection bus bar, and may directly contact the connection bus bar and the pair of cooling plates, respectively.
[13]
The heat transfer member may be formed of a thermal interface material.
[14]
The heat sink may be provided in a pair, and the pair of heat sinks may include an inner flow path for the flow of coolant, and may cover the at least one battery cell and one side and the other side of the bus bar assembly. .
[15]
The pair of heat sinks may include: a lower heat sink covering a lower side of the at least one battery cell and the bus bar assembly; And 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.
[16]
The battery module may further include a perimeter tube that at least partially surrounds the pair of cooling plates and communicates with the at least one heat sink.
[17]
The perimeter tube at least partially surrounds each cooling plate, and includes a tube body having an inner flow path; At least one cooling water supply pipe communicating the tube body with the at least one heat sink and supplying cooling water to the tube body side; And at least one cooling water discharge pipe that is spaced apart from the cooling water supply pipe by a predetermined distance and communicates the tube body and the at least one heat sink so that the cooling water in the tube body can be discharged to the at least one heat sink.
[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 when a battery module or a battery pack is cooled, a battery pack including the battery module, and a vehicle including the battery pack are provided. can do.
Brief description of the drawing
[21]
The following drawings attached 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 to be described later, so the present invention 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]
FIG. 2 is a diagram illustrating a heat transfer path and a flow of coolant in the battery module of FIG. 1.
[24]
3 and 4 are views for explaining a battery module according to another embodiment of the present invention.
[25]
5 is a view for explaining the flow of cooling water in the perimeter tube of the battery module of FIG. 3.
[26]
6 is a view for explaining a perimeter tube according to another embodiment of the battery module of FIG. 3.
[27]
7 is a view for explaining a battery module according to another embodiment of the present invention.
[28]
FIG. 8 is a diagram illustrating a heat transfer path and a flow of cooling water of the battery module of FIG. 7.
[29]
9 and 10 are views for explaining a battery module according to another embodiment of the present invention.
[30]
11 and 12 are views for explaining a battery module according to another embodiment of the present invention.
[31]
13 is a diagram illustrating a battery pack according to an embodiment of the present invention.
[32]
14 is a view for explaining a vehicle according to an embodiment of the present invention.
Mode for carrying out the invention
[33]
The present invention will become more apparent by describing in detail a preferred embodiment 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.
[34]
1 is a view for explaining a battery module according to an embodiment of the present invention.
[35]
Referring to FIG. 1, the battery module 10 may include a battery cell 100, a bus bar assembly 200, a heat sink 300, and a cooling plate 500.
[36]
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 embodiment, the battery cell 100 is limited to being provided as a pouch type secondary battery.
[37]
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.
[38]
The bus bar assembly 200 is connected to the electrode lead 105 of the at least one battery cell 100 and may be provided on both sides of the at least one battery cell 100.
[39]
The bus bar assembly 200 may include a bus bar housing 210, a connection bus bar 230, and a heat transfer member 250.
[40]
The busbar 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 busbar housing 210 may have a size capable of covering both sides of the at least one battery cell 100.
[41]
The connection bus bar 230 is provided in the bus bar housing 210 and may contact the at least one electrode lead 105 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 105 and laser welding.
[42]
The heat transfer member 250 may guide the connection between the connection bus bar 230 and a pair of cooling plates 500 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 a pair of cooling plates 500 to be described later.
[43]
The heat transfer member 250 may be formed of a thermal interface material having high heat transfer efficiency. In addition, the heat transfer member 250 may perform an insulating function between the connection bus bar 230 and a pair of cooling plates 500 to be described later.
[44]
The heat sink 300 may be provided on at least one side of the at least one battery cell 100 and the bus bar assembly 200. Specifically, the heat sink 300 may be provided under the at least one battery cell 100 and the bus bar assembly 200. An internal flow path 305 through which coolant flows may be provided in the heat sink 300.
[45]
The cooling plate 500 may be provided in a pair. The pair of cooling plates 500 may be vertically connected to the heat sink 300 and may directly contact the bus bar assembly 200. The cooling plate 500 may be formed of a metal material having high thermal conductivity.
[46]
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.
[47]
FIG. 2 is a diagram illustrating a heat transfer path and a flow of coolant in the battery module of FIG. 1.
[48]
Referring to FIG. 2, when the at least one battery cell 100 generates heat, heat generated by the at least one battery cell 100 may be transferred to the heat sink 300. The heat sink 300 may cool the at least one battery cell 100 according to the flow of coolant through the internal flow path 305.
[49]
In addition, the heat generated from both sides of the at least one battery cell 100, that is, the electrode lead 105 and the connection bus bar 230 side of the bus bar assembly 200, is the pair of cooling plates It can be delivered to the 500 side.
[50]
Here, the heat transfer member 250 of the bus bar assembly 200 includes the pair of heat generated from the electrode lead 105 and the connection bus bar 230 of the at least one battery cell 100. Heat transfer to the cooling plate 500 can be accelerated more quickly.
[51]
Since the pair of cooling plates 500 are connected to the heat transfer member 250 and the heat sink 300, the electrode lead 105 and the bus bar assembly 200 of the at least one battery cell 100 ), the heat generated at the side of the connection bus bar 230 can also be effectively reduced.
[52]
Specifically, heat transfer between both sides of the at least one battery cell 100 may include the at least one battery cell 100, the electrode lead 105, the connection bus bar 230, and the heat transfer member 250. ), the pair of cooling plates 500 and the heat sink 300 may be formed.
[53]
As such, in this embodiment, a portion close to the electrode lead 105 due to heat generation on the electrode lead 105 side of the at least one battery cell 100 through the pair of cooling plates 500 is not It is possible to effectively prevent the cooling deviation of the at least one battery cell 100, which is caused by a local temperature higher than that of the non-existent portion.
[54]
Accordingly, in the present embodiment, the at least one battery cell 100 through a pair of cooling plates 500 connected to the heat transfer member 250 of the bus bar assembly 200 and the heat sink 300 It is possible to significantly improve the cooling temperature deviation that may occur during the cooling of the.
[55]
3 and 4 are views for explaining a battery module according to another embodiment of the present invention.
[56]
Since the battery module 20 according to the present embodiment is similar to the battery module 10 of the previous embodiment, redundant descriptions are omitted for configurations that are substantially the same as or similar to the previous embodiment, Explain around the differences.
[57]
3 and 4, the battery module 20 includes the battery cell 100, the bus bar assembly 200, the heat sink 300, the cooling plate 500, and the perimeter tube 600. ) Can be included.
[58]
Since the battery cell 100, the bus bar assembly 200, the heat sink 300, and the cooling plate 500 are substantially the same as or similar to those of the previous embodiment, redundant descriptions are omitted below.
[59]
The perimeter tube 600 may be provided in a pair. Each of the pair of perimeter tubes 600 may at least partially surround the pair of cooling plates 500 and communicate with the heat sink 300.
[60]
Specifically, the pair of perimeter tubes 600 may each surround the rim of the cooling plate 500 so as to contact the rim of the cooling plate 500.
[61]
The pair of perimeter tubes 600 may each include a tube body 610, a cooling water supply pipe 630, and a cooling water discharge pipe 650.
[62]
The tube body 610 may at least partially surround each cooling plate 500. An inner flow path 615 through which the coolant can flow may be provided inside the tube body 610.
[63]
The cooling water supply pipe 630 may communicate with the tube body 610 and the heat sink 300 and supply cooling water in the heat sink 300 toward the tube body 610.
[64]
The cooling water discharge pipe 650 is spaced apart from the cooling water supply pipe 630 by a predetermined distance, and the internal flow path of the tube body 610 to allow the cooling water in the tube body 610 to be discharged to the heat sink 300. 615 and the heat sink 300 may be communicated.
[65]
Hereinafter, the cooling through the perimeter tube 600 of the battery module 10 will be described in more detail.
[66]
5 is a view for explaining the flow of cooling water in the perimeter tube of the battery module of FIG. 3.
[67]
Referring to FIG. 5, the coolant inside the heat sink 300 may be introduced into the tube body 610 of the perimeter tube 600 through the coolant supply pipe 630 of the perimeter tube 600.
[68]
The cooling water introduced into the tube body 610 flows along the internal flow path 615 of the tube body 610 and passes through the cooling water discharge pipe 650 to the internal flow path 305 of the heat sink 300 You can exit again with
[69]
In the present embodiment, the temperature of the cooling plate 500 disposed in the perimeter tube 600 may be further lowered through the perimeter tube 600, so that the electrode lead of the at least one battery cell 100 It is possible to lower the temperature of the portion close to (105, see FIG. 3).
[70]
Accordingly, in the present embodiment, through the perimeter tube 600, a portion close to the electrode lead 105 due to heat generation on the electrode lead 105 side of the at least one battery cell 100 and not The cooling deviation of the part can be further improved.
[71]
6 is a view for explaining a perimeter tube according to another embodiment of the battery module of FIG. 3.
[72]
6, if the cooling water supply pipe 635 and the cooling water discharge pipe 655 of the perimeter tube 600 can supply and discharge the cooling water from the heat sink 300 into the tube body 610, , The tube body 610 may be formed to have a predetermined length so as to be spaced apart from the heat sink 300 by a predetermined distance.
[73]
7 is a view for explaining a battery module according to another embodiment of the present invention.
[74]
Since the battery module 30 according to the present embodiment is similar to the battery modules 10 and 20 of the previous embodiment, redundant descriptions will be omitted for configurations that are substantially the same or similar to those of the previous embodiments, The description will focus on differences from the embodiments.
[75]
Referring to FIG. 7, the battery module 30 may include the battery cell 100, the bus bar assembly 200, a pair of heat sinks 300 and 400, and the cooling plate 500. have.
[76]
Since the battery cell 100 and the bus bar assembly 200 are substantially the same as or similar to the previous embodiments, redundant descriptions will be omitted below.
[77]
The pair of heat sinks 300 and 400 includes internal flow paths 305 and 405 for flow of the cooling water, and one side of the at least one battery cell 100 and the bus bar assembly 200 and The other side can be covered.
[78]
The pair of heat sinks 300 and 400 may include a lower heat sink 300 and an upper heat sink 400.
[79]
The lower heat sink 300 may include the inner flow path 305 and may cover the at least one battery cell 100 and a lower side of the bus bar assembly 200. The lower heat sink 300 may be disposed to be in contact with the lower side of the pair of cooling plates 500.
[80]
The upper heat sink 400 may include the inner flow path 405 and may cover the at least one battery cell 100 and an upper side of the bus bar assembly 200. The lower heat sink 300 may be disposed to be in contact with the upper side of the pair of cooling plates 500.
[81]
Hereinafter, the heat transfer path and the cooling water flow of the battery module 30 according to the present embodiment will be described in more detail.
[82]
FIG. 8 is a diagram illustrating a heat transfer path and a flow of cooling water of the battery module of FIG. 7.
[83]
Referring to FIG. 8, heat generated from the at least one battery cell 100 may be transferred to the lower heat sink 300 and the upper heat sink 400. In addition, heat generated from the electrode lead 105 of the at least one battery cell 100 and the connection bus bar 230 of the bus bar assembly 200 may be applied to the heat transfer member 250 and the cooling plate. It may be transferred to the lower heat sink 300 and the upper heat sink 400 through 500.
[84]
Accordingly, in the present embodiment, since a dual cooling structure through the upper heat sink 400 and the lower heat sink 300 is implemented, cooling performance may be further improved.
[85]
9 and 10 are views for explaining a battery module according to another embodiment of the present invention.
[86]
Since the battery module 40 according to the present embodiment is similar to the battery modules 10, 20, 30 of the previous embodiment, redundant descriptions will be omitted for configurations that are substantially the same or similar to those of the previous embodiments , It will be described focusing on the differences from the previous embodiments.
[87]
9 and 10, the battery module 40 includes the battery cell 100, the bus bar assembly 200, the pair of heat sinks 300 and 400, and the cooling plate 500. And the pair of perimeter tubes 600.
[88]
Since the battery cell 100 and the bus bar assembly 200 are substantially the same as or similar to the previous embodiments, redundant descriptions will be omitted below.
[89]
The pair of heat sinks 300 and 400 may include the lower heat sink 300 and the upper heat sink 400.
[90]
Since the lower heat sink 300 and the upper heat sink 400 are substantially the same as or similar to those of the previous embodiment, redundant descriptions will be omitted below.
[91]
Since the cooling plate 500 is substantially the same as or similar to the previous embodiments, redundant descriptions will be omitted below.
[92]
Each of the pair of perimeter tubes 600 may include a tube body 610, a cooling water supply pipe 630, and a cooling water discharge pipe 650.
[93]
The upper side of the tube body 610 may be disposed in contact with the lower portion of the upper heat sink 400. Accordingly, in the present embodiment, the cooling performance of the tube body 610 may be further improved, and the temperature of the cooling plate 500 may be further lowered.
[94]
The cooling water supply pipe 630 and the cooling water discharge pipe 650 are substantially the same as or similar to those of the previous embodiments, and thus redundant descriptions will be omitted below.
[95]
As described above, in this embodiment, since the upper heat sink 400 is disposed in contact with the perimeter tube 600, the cooling performance of the perimeter tube 600 can be further improved.
[96]
11 and 12 are views for explaining a battery module according to another embodiment of the present invention.
[97]
Since the battery module 50 according to the present embodiment is similar to the battery modules 10, 20, 30, and 40 of the previous embodiment, a redundant description will be given for a configuration that is substantially the same as or similar to the previous embodiments. It will be omitted, and will be described focusing on differences from the previous embodiments.
[98]
11 and 12, the battery module 50 includes the battery cell 100, the bus bar assembly 200, the pair of heat sinks 300 and 400, and the cooling plate 500 And it may include a pair of perimeter tubes 700.
[99]
Since the battery cell 100 and the bus bar assembly 200 are substantially the same as or similar to the previous embodiments, redundant descriptions will be omitted below.
[100]
The pair of heat sinks 300 and 400 may include the lower heat sink 300 and the upper heat sink 400.
[101]
The lower heat sink 300 and the upper heat sink 400 may have different flow rates of cooling water flowing therein. In this embodiment, the flow rate of the lower heat sink 300 may be greater than the flow rate of the upper heat sink 400.
[102]
Since the cooling plate 500 is substantially the same as or similar to the previous embodiments, redundant descriptions will be omitted below.
[103]
The pair of perimeter tubes 700 may include a tube body 710, cooling water supply pipes 730 and 740, and cooling water discharge pipes 750 and 760, respectively.
[104]
The tube body 710 has an internal flow path 715, surrounds the edge of the cooling plate 500, and contacts the upper surface of the lower heat sink 300 and the lower surface of the upper heat sink 400. It may be disposed or may be disposed a predetermined distance apart.
[105]
The cooling water supply pipes 730 and 740 may be provided in a pair. The pair of cooling water supply pipes 730 and 740 are provided at the bottom of the tube body 710, respectively, and may communicate with the inner flow path 305 of the lower heat sink 300.
[106]
The cooling water discharge pipes 750 and 760 may be provided in a pair. The pair of cooling water discharge pipes 750 and 760 are provided above the tube body 710, respectively, and may communicate with the inner flow path 405 of the upper heat sink 400.
[107]
As such, in the present embodiment, the pair of perimeter tubes 700 may be provided with a pair of cooling water supply pipes 730 and 740 and cooling water discharge pipes 750 and 760, respectively. In this case, the flow of the cooling water may have different flow rates between the lower heat sink 300 and the upper heat sink 400 for flow flow, as described above.
[108]
On the other hand, when the flow rate of the lower heat sink 300 is smaller than the flow rate of the upper heat sink 400, the pair of cooling water supply pipes 730 and 740 are provided above the tube body 710 In addition, the pair of cooling water discharge pipes 750 and 760 may be provided at the bottom of the tube body 710.
[109]
13 is a view for explaining a battery pack according to an embodiment of the present invention, and FIG. 14 is a view for explaining a vehicle according to an embodiment of the present invention.
[110]
13 and 14, the battery pack 1 includes at least one battery module 10 according to the preceding embodiment and a pack case 60 for packaging the at least one battery module 10. I can.
[111]
The at least one battery module may be provided as any one of the battery modules 20, 30, 40, and 50 of the previous embodiment, or may be provided in plural. It goes without saying that when provided in plural, it may be provided as an assembly of the battery module 10 and the battery modules 20, 30, 40, and 50 of the previous embodiment.
[112]
The battery pack 1 may be provided in the vehicle V as a fuel source for the vehicle V. By way of 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.
[113]
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.
[114]
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.
[115]
According to various embodiments as described above, the battery module 10, 20, 30, 40, 50, which can improve the cooling temperature deviation of the battery cell 100, the battery module 10, 20, 30 It is possible to provide the battery pack 1 including 40, 50 and the vehicle V including the battery pack 1.
[116]
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 at least one heat sink provided on at least one side of the at least one battery cell and the bus bar assembly. And a pair of cooling plates vertically connected to the at least one heat sink and in direct contact with 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 between the connection bus bar and the pair of cooling plates.
[Claim 3]
The battery module according to claim 2, wherein the heat transfer member is mounted on the connection busbar and directly contacts the connection busbar and the pair of cooling plates.
[Claim 4]
The battery module of claim 2, wherein the heat transfer member is made of a thermal interface material.
[Claim 5]
The method of claim 1, wherein the heat sink is provided in a pair, and the pair of heat sinks has an inner flow path for the flow of coolant, and the at least one battery cell and one side of the bus bar assembly and Battery module, characterized in that to cover the other side.
[Claim 6]
The apparatus of claim 5, wherein the pair of heat sinks comprises: a lower heat sink covering a lower side of the at least one battery cell and the bus bar assembly; And an upper heat sink disposed opposite to the lower heat sink and covering an upper side of the at least one battery cell and the bus bar assembly.
[Claim 7]
The battery module of claim 1, further comprising: a perimeter tube at least partially surrounding the pair of cooling plates and communicating with the at least one heat sink.
[Claim 8]
The apparatus of claim 7, wherein the perimeter tube comprises: a tube body at least partially surrounding each cooling plate and having an inner flow path; At least one cooling water supply pipe communicating the tube body with the at least one heat sink and supplying cooling water to the tube body side; And at least one cooling water discharge pipe that is spaced apart from the cooling water supply pipe by a predetermined distance and communicates the tube body and the at least one heat sink so that the cooling water in the tube body can be discharged to the at least one heat sink. 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.