Cooling device and battery pack comprising same

Abstract

A cooling device according to some embodiments of the present invention comprises: a heat sink including a plurality of cooling channels and a plurality of hollows; and a manifold coupled to the heat sink. The manifold includes a plurality of sub-flow paths positioned on a side close to the heat sink so as to correspond to the plurality of cooling channels, and a plurality of main flow paths on a side far from the heat sink. The plurality of sub-flow paths may branch from the plurality of main flow paths. Some embodiments of the present invention can quickly cool a battery. Accordingly, the stability of the battery can be improved, and the battery can be quickly charged.

Description

Cooling device and battery pack including same

[0001] The present invention relates to a cooling device and a battery pack including the same.

[0002] This disclosure claims the benefit of priority to Republic of Korea Patent Application No. 10-2024-0087284, filed July 3, 2024, the entire contents of which are incorporated by reference herein.

[0003] To reduce dependence on fossil fuels and carbon emissions, interest in rechargeable secondary batteries, which can be reused for extended periods of time, is growing. Secondary batteries are used in diverse fields, including vehicles, portable electronic devices, and energy storage systems (ESS). Therefore, various technologies to enhance the safety of secondary batteries are being researched. In particular, the operating temperature of secondary batteries must be maintained at an appropriate level, as a thermal runaway event can lead to serious accidents such as fire and explosion. Furthermore, operating temperatures exceeding this threshold negatively impact performance, including battery life and capacity. Consequently, extensive research is being conducted on cooling technologies for secondary batteries.

[0004] The technical idea of ​​the present invention is to provide a cooling technology for a battery.

[0005] Some embodiments of the present invention that can solve the above problem are as follows.

[0006] A cooling device according to some embodiments comprises a heat sink including a plurality of cooling channels and a plurality of cavities; and a manifold coupled to the heat sink; wherein the manifold includes a plurality of sub-channels positioned corresponding to the plurality of cooling channels on a side closer to the heat sink and a plurality of main channels on a side farther from the heat sink, and wherein the plurality of sub-channels may be branched from the plurality of main channels.

[0007] The plurality of cooling channels include a plurality of first cooling channels and a plurality of second cooling channels, and a cross-sectional area of ​​each of the plurality of second cooling channels may be different from a cross-sectional area of ​​each of the plurality of first cooling channels.

[0008] The cross-sectional shape of each of the plurality of second cooling channels may be different from the cross-sectional shape of each of the plurality of first cooling channels.

[0009] The cross-sectional area of ​​each of the plurality of second cooling channels is larger than the cross-sectional area of ​​each of the plurality of first cooling channels, the cross-sectional shape of each of the plurality of second cooling channels may be a square, a rectangle, a rounded square, or a rounded rectangle, and the cross-sectional shape of each of the plurality of first cooling channels may be a circle or an ellipse.

[0010] The cross-sectional area of ​​each of the plurality of first cooling channels may be the same as the cross-sectional area of ​​each of the plurality of hollows, and the cross-sectional shape of each of the plurality of first cooling channels may be the same as the cross-sectional shape of each of the plurality of hollows.

[0011] Each of the above multiple main euros can be branched into three sub euros.

[0012] One of the three sub-euro streams may be positioned to correspond to the first cooling channel, and the remaining two sub-euro streams may be positioned to correspond to the second cooling channel.

[0013] One sub-channel corresponding to the first cooling channel may be located between the remaining two sub-channels corresponding to the second cooling channels.

[0014] The manifold may include a plurality of coupling holes positioned corresponding to the plurality of hollows on a side near the heat sink and a side far from the heat sink.

[0015] Each of the plurality of coupling holes positioned far from the heat sink may be positioned alternately with each of the plurality of main ducts.

[0016] A gasket may be interposed between the heat sink and the manifold.

[0017] A battery pack according to some embodiments includes a cooling device; and a battery cell assembly disposed on the cooling device and including a plurality of battery cells; wherein the cooling device includes a heat sink including a plurality of cooling channels and a plurality of hollows; and a manifold coupled to the heat sink; wherein the manifold includes a plurality of sub-channels positioned corresponding to the plurality of cooling channels on a side proximate to the heat sink and a plurality of main channels on a side distal from the heat sink, and wherein the plurality of sub-channels may be branched from the plurality of main channels.

[0018] The plurality of cooling channels include a plurality of first cooling channels and a plurality of second cooling channels, each of the plurality of second cooling channels having a cross-sectional area larger than each of the plurality of first cooling channels, each of the plurality of second cooling channels having a cross-sectional shape of a square, a rectangle, a rounded square, or a rounded rectangle, and each of the plurality of first cooling channels having a cross-sectional shape of a circle or an ellipse.

[0019] The cross-sectional area of ​​each of the plurality of first cooling channels may be the same as the cross-sectional area of ​​each of the plurality of hollows, and the cross-sectional shape of each of the plurality of first cooling channels may be the same as the cross-sectional shape of each of the plurality of hollows.

[0020] Each of the plurality of main channels may be branched into three sub channels, one of the three sub channels may be positioned to correspond to the first cooling channel, the remaining two sub channels may be positioned to correspond to the second cooling channels, and one sub channel corresponding to the first cooling channel may be positioned between the remaining two sub channels corresponding to the second cooling channels.

[0021] Some embodiments of the present invention can rapidly cool a battery. This can improve battery stability and enable rapid charging of the battery.

[0022] The effects of the embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the embodiments of the present invention pertain from the following description. In other words, unintended effects resulting from practicing the embodiments of the present invention can also be clearly derived and understood by those skilled in the art to which the embodiments of the present invention pertain.

[0023] FIG. 1 is a schematic perspective view of a cooling device according to some embodiments.

[0024] Figure 2 is an exploded perspective view schematically illustrating a cooling device according to some embodiments.

[0025] FIG. 3 is a schematic perspective view of a manifold that may be included in a cooling device according to some embodiments.

[0026] FIG. 4 is a schematic top view of a cooling device according to some embodiments.

[0027] Fig. 5 is a cross-sectional view taken along the cutting line V-V' of Fig. 4.

[0028] FIG. 6 is a perspective view schematically illustrating a battery pack according to some embodiments.

[0029] FIG. 7 is a perspective view schematically illustrating the interior of a battery pack according to some embodiments.

[0030] The terms or words used in this specification should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted in a meaning that conforms to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the meaning of the terms or words to explain his or her own invention in the best way.

[0031] In this specification, it should be understood that terms such as "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof. In addition, when it is said that a part such as a layer, film, region or plate is "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part such as a layer, film, region or plate is "under" another part, this includes not only the case where it is "directly below" the other part, but also the case where there is another part in between.

[0032] It should be understood that the examples and drawings are merely examples of the present invention and do not represent all of the technical ideas of the present invention, and that various equivalents and modifications may be substituted for them.

[0033] When describing the present invention, if it is determined that a detailed description of a known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

[0034] Since the drawings are provided to more completely explain the present invention to those skilled in the art, the shape, size, and number of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. The shape, size, ratio, and number of each component in the drawings do not entirely reflect the actual shape, size, ratio, and number of each component.

[0035] In this specification, for convenience of explanation, the position of a configuration, the shape of a configuration, and the relationship between configurations are described using a three-dimensional Cartesian coordinate system. The X-axis, the Y-axis, and the Z-axis are indicated in FIGS. 1 to 7. In this specification, "X-direction" means a direction parallel to the X-axis. "Y-direction" in this specification means a direction parallel to the Y-axis. "Z-direction" in this specification means a direction parallel to the Z-axis.

[0036]

[0037] (Example 1)

[0038] FIG. 1 is a schematic perspective view of a cooling device according to some embodiments.

[0039] Figure 2 is an exploded perspective view schematically illustrating a cooling device according to some embodiments.

[0040] FIG. 3 is a schematic perspective view of a manifold that may be included in a cooling device according to some embodiments.

[0041] FIG. 4 is a schematic top view of a cooling device according to some embodiments.

[0042] Fig. 5 is a cross-sectional view taken along the cutting line V-V' of Fig. 4.

[0043] Referring to FIGS. 1, 2 and 4, in some embodiments, the cooling device (1000) may include a heat sink (1100), a manifold (1200), a gasket (1300), a plurality of joining members (1400) and a plurality of connectors (1500).

[0044] The heat sink (1100) may be part of a housing that accommodates a heat source (such as a plurality of battery cells). The heat sink (1100) may be a support plate configured to support the heat source (such as a plurality of battery cells). The heat sink (1100) may be a lid configured to cover the upper portion of the heat source (such as a plurality of battery cells).

[0045] The heat sink (1100) can be manufactured through an extrusion process. The heat sink (1100) can have a seamless structure. A plurality of hollows can be formed in the heat sink (1100). The cross-sectional shape of each of the plurality of hollows can be substantially the same as the cross-sectional shape of the discharge port of the die from which each of the plurality of hollows is discharged. Some of the plurality of hollows can be utilized as cooling channels. That is, among the plurality of hollows, those utilized as cooling channels can be referred to as cooling channels, and those not utilized as cooling channels can be referred to as hollows.

[0046] The plurality of cooling channels may provide a path through which a cooling fluid can flow. The cooling fluid may absorb heat from a heat source (e.g., a plurality of battery cells) and thereby lower the temperature of the heat source (e.g., a plurality of battery cells). Each of the plurality of cavities may provide a space into which a corresponding one of the plurality of connecting members (1400) may be inserted.

[0047] Referring to FIGS. 2, 4, and 5, in some embodiments, the heat sink (1100) may include a plurality of first cooling channels (1110), a plurality of second cooling channels (1120), and a plurality of hollows (1130). The plurality of first cooling channels (1110) may extend in the X-direction. The plurality of second cooling channels (1120) may extend in the X-direction. The plurality of hollows (1130) may extend in the X-direction. Each of the plurality of first cooling channels (1110) may be positioned to be spaced apart from each other by a predetermined distance in the Y-direction. Each of the plurality of second cooling channels (1120) may be positioned to be spaced apart from each other by a predetermined distance in the Y-direction. Each of the plurality of hollows (1130) may be positioned to be spaced apart from each other by a predetermined distance in the Y-direction. Each of the plurality of first cooling channels (1110) may be positioned between two adjacent second cooling channels (1120) among the plurality of second cooling channels (1120). Each of the plurality of first cooling channels (1110) may be positioned alternately with each of the plurality of hollows (1130). Although the hollows (1130) are shown as being positioned at both ends of the heat sink (1100) in FIGS. 2, 4, and 5, this is merely exemplary. The second cooling channels (1120) may be positioned at both ends of the heat sink (1100). The hollows (1130) may be positioned at one end of the heat sink (1100) and the second cooling channels (1120) may be positioned at the other end.

[0048] Referring to FIG. 5, in some embodiments, a cross-sectional area of ​​each of the plurality of first cooling channels (1110) may be different from a cross-sectional area of ​​each of the plurality of second cooling channels (1120). In some embodiments, a cross-sectional shape of each of the plurality of first cooling channels (1110) may be different from a cross-sectional shape of each of the plurality of second cooling channels (1120). In some embodiments, a cross-sectional area of ​​each of the plurality of second cooling channels (1120) may be larger than a cross-sectional area of ​​each of the plurality of first cooling channels (1110). In some embodiments, a cross-sectional shape of each of the plurality of second cooling channels (1120) may be a square, a rectangle, a rounded square, or a rounded rectangle. In some embodiments, a cross-sectional shape of each of the plurality of first cooling channels (1110) may be a circle or an ellipse. In some embodiments, a cross-sectional shape of each of the plurality of hollows (1130) may be a circle or an ellipse. In some embodiments, the cross-sectional area of ​​each of the plurality of first cooling channels (1110) may be substantially the same as the cross-sectional area of ​​each of the plurality of hollows (1130). In some embodiments, the cross-sectional shape of each of the plurality of first cooling channels (1110) may be substantially the same as the cross-sectional shape of each of the plurality of hollows (1130).

[0049] The manifold (1200) may be configured to provide a path for a cooling fluid to flow into or out of the plurality of cooling channels of the heat sink (1100). The manifold (1200) may include a plurality of sub-channels positioned corresponding to the plurality of cooling channels on a side closer to the heat sink (1100). Each of the plurality of sub-channels may be connected to a corresponding one of the plurality of cooling channels. The manifold (1200) may include a plurality of main channels on a side farther from the heat sink (1100). The plurality of sub-channels may be branched from the plurality of main channels.

[0050] The manifold (1200) enables more of the cavities formed in the heat sink (1100) to be utilized as cooling channels. That is, the manifold (1200) enables the heat sink (1100) to include not only the plurality of first cooling channels (1110) but also the plurality of second cooling channels (1120). In order for the heat sink (1100) to include not only the plurality of first cooling channels (1110) but also the plurality of second cooling channels (1120) without the manifold (1200), cooling ports and / or connectors corresponding to each of the plurality of first cooling channels (1110) and each of the plurality of second cooling channels (1120) are required. At this time, due to space limitations, it is extremely difficult to install cooling ports and / or connectors corresponding to each of the plurality of first cooling channels (1110) and each of the plurality of second cooling channels (1120). Additionally, if the cross-sectional shapes of each of the plurality of first cooling channels (1110) and each of the plurality of second cooling channels (1120) are different, at least two types of cooling ports and / or connectors are required, which is inefficient.

[0051] Referring to FIG. 4, the manifold (1200) may include a plurality of main channels (1210). Each of the plurality of main channels (1210) may be branched into three sub channels (1220, 1230, 1240). A first sub channel (1220) may be positioned to correspond to a second cooling channel (1120). The first sub channel (1220) may overlap with a corresponding one of the plurality of second cooling channels (1120) in the X direction. A second sub channel (1230) may be positioned to correspond to a first cooling channel (1110). The second sub channel (1230) may overlap with a corresponding one of the plurality of first cooling channels (1110) in the X direction. A third sub channel (1240) may be positioned to correspond to a second cooling channel (1120). The third sub-channel (1240) may overlap with a corresponding one of the plurality of second cooling channels (1120) in the X direction. The second sub-channel (1230) may be located between the first sub-channel (1220) and the third sub-channel (1240). The second sub-channel (1230) may overlap with the main channel (1210) from which it is branched in the X direction.

[0052] Referring to FIGS. 2 to 4, the manifold (1200) may include a plurality of coupling holes (1250) positioned to correspond to a plurality of hollows (1130) on a side close to the heat sink (1100) and a side far from the heat sink (1100). Each of the plurality of coupling holes (1250) may overlap with a corresponding one of the plurality of hollows (1130) in the X direction. A cross-sectional shape of each of the plurality of coupling holes (1250) may be substantially the same as a cross-sectional shape of a corresponding one of the plurality of hollows (1130). A cross-sectional area of ​​each of the plurality of coupling holes (1250) may be substantially the same as a cross-sectional area of ​​a corresponding one of the plurality of hollows (1130). Each of the plurality of coupling holes (1250) positioned on a side far from the heat sink (1100) may be alternately positioned with each of the plurality of main channels (1210).

[0053] A gasket (1300) may be interposed between the heat sink (1100) and the manifold (1200). The gasket (1300) may prevent cooling fluid from leaking. That is, the gasket (1300) may allow the manifold (1200) to be watertightly coupled to the heat sink (1100). The gasket (1300) may include a plurality of holes positioned to correspond to a plurality of coupling holes (1250) positioned closer to the heat sink (1100). The gasket (1300) may include a plurality of holes positioned to correspond to the first sub-channel (1220), the second sub-channel (1230), and the third sub-channel (1240). The cooling device (1000) according to some embodiments may not include the gasket (1300). At this time, the manifold (1200) can be watertightly connected to the heat sink (1100) by welding or other methods.

[0054] A plurality of coupling members (1400) can couple the manifold (1200) to the heat sink (1100). The plurality of coupling members (1400) can be inserted into a corresponding one of the plurality of hollows (1130) by passing through a corresponding pair of coupling holes (1250) among the plurality of coupling holes (1250). As a non-limiting example, the plurality of coupling members (1400) can each be a screw or a bolt.

[0055] Each of the plurality of connectors (1500) may be connected to a corresponding one of the plurality of main channels (1210). Each of the plurality of connectors (1500) may be coupled to a corresponding one of the plurality of cooling ports (not shown). As a non-limiting example, each of the plurality of connectors (1500) may be inserted into and coupled to a corresponding one of the plurality of cooling ports (not shown). The plurality of cooling ports (not shown) may be connected to a cooling fluid reservoir (not shown) via a cooling hose (not shown). The cooling fluid may be sequentially delivered from the cooling fluid reservoir (not shown) through the cooling hose (not shown), the plurality of cooling ports (not shown), and the plurality of connectors (1500) to the plurality of main channels (1210). Conversely, the cooling fluid may be sequentially delivered from the plurality of main channels (1210) through the plurality of connectors (1500), the plurality of cooling ports (not shown), and the cooling hose (not shown) to the cooling fluid reservoir (not shown).

[0056]

[0057] (Example 2)

[0058] A battery pack according to some embodiments may include a cooling device (1000) and a battery cell assembly disposed on the cooling device (1000) and including a plurality of battery cells.

[0059] FIG. 6 is a perspective view schematically illustrating a battery pack according to some embodiments.

[0060] FIG. 7 is a perspective view schematically illustrating the interior of a battery pack according to some embodiments.

[0061] Referring to FIGS. 6 and 7, the battery pack (2000) may include a cooling device (1000), a battery cell assembly (2100), a side wall (2200), a first bulkhead (2300), a second bulkhead (2400), and a lid (2500).

[0062] The cooling device (1000) is substantially the same as that described above, so its description is omitted.

[0063] A battery cell assembly (2100) may be configured to store energy. The battery cell assembly (2100) may be a cell unit including a plurality of battery cells. The battery cell assembly (2100) may not include a module frame. An assembly method in which a cell unit is mounted on a battery pack may be referred to as a cell-to-pack. A battery pack assembled using a cell-to-pack method may be referred to as a module-less type battery pack. The battery cell assembly (2100) may be a battery module. A battery module may include a cell unit including a plurality of battery cells and a module frame on which the cell unit is mounted. An assembly method in which a cell unit is mounted on a module frame having at least one open side and the module frame is mounted on a battery pack is also referred to as a cell-to-pack.

[0064] Each of the plurality of battery cells may be a secondary battery. Each of the plurality of battery cells may be a lithium secondary battery. Each of the plurality of battery cells may be any one of a lithium ion battery, a lithium ion polymer battery, a lithium metal battery, and a lithium polymer battery. The three-dimensional shape of each of the plurality of battery cells may be any one of a cylindrical shape, a square shape, and a pouch shape. The three-dimensional shape of the battery cell refers to the three-dimensional shape of the battery case.

[0065] A side wall (2200) may be positioned on the cooling device (1000) to surround the battery cell assembly (2100), the first bulkhead (2300), and the second bulkhead (2400). The side wall (2200) may provide a space in which the battery cell assembly (2100), the first bulkhead (2300), and the second bulkhead (2400) are mounted together with the cooling device (1000). The first bulkhead (2300) may extend in the Y direction. The first bulkhead (2300) may be positioned between the battery cell assemblies (2100). The second bulkhead (2400) may extend in the X direction. The second bulkhead (2400) may be positioned between the battery cell assemblies (2100). The lead (2500) can be coupled to the side wall (200) to cover the battery cell assembly (2100), the side wall (2200), the first bulkhead (2300), and the second bulkhead (2400).

[0066] According to some embodiments, the battery pack (2000) can rapidly cool the battery cell assembly (2100) even if heat is generated in the battery cell assembly (2100), since the cooling fluid flowing through the plurality of cooling channels included in the cooling device (1000) can absorb the heat. Accordingly, the battery pack (2000) according to some embodiments has excellent stability and can be rapidly charged.

[0067]

[0068] The above description is intended solely to illustrate the present invention. The scope of the present invention should be interpreted in accordance with the claims, and all technical ideas within the scope equivalent or equivalent thereto should be construed as being included within the scope of the present invention.

[0069]

[0070] [Explanation of symbols]

[0071] 1000: Cooling device

[0072] 1100: Heat sink

[0073] 1110: First cooling channel

[0074] 1120: Second cooling channel

[0075] 1130: China

[0076] 1200: Manifold

[0077] 1210: Main Euro

[0078] 1220, 1230, 1240: Sub-Euro

[0079] 1250: Combination Hall

[0080] 1300: Gasket

[0081] 1400: Joining member

[0082] 1500: Connector

[0083] 2000: Battery Pack

[0084] 2100: Battery cell assembly

[0085] 2200: Sidewall

[0086] 2300: First bulkhead

[0087] 2400: Second bulkhead

[0088] 2500: Lid

Claims

1. A heat sink comprising a plurality of cooling channels and a plurality of cavities; and A manifold coupled to the above heat sink; Including, The above manifold, comprising a plurality of sub-flow channels positioned corresponding to the plurality of cooling channels on the side closer to the heat sink; comprising a plurality of main euros on the far side of the heat sink, and A cooling device wherein the plurality of sub-euro streams are branched from the plurality of main euro streams.

2. In paragraph 1, The plurality of cooling channels include a plurality of first cooling channels and a plurality of second cooling channels, and A cooling device wherein the cross-sectional area of ​​each of the plurality of second cooling channels is different from the cross-sectional area of ​​each of the plurality of first cooling channels.

3. In paragraph 2, A cooling device in which the cross-sectional shape of each of the plurality of second cooling channels is different from the cross-sectional shape of each of the plurality of first cooling channels.

4. In paragraph 2, The cross-sectional area of ​​each of the plurality of second cooling channels is larger than the cross-sectional area of ​​each of the plurality of first cooling channels, The cross-sectional shape of each of the plurality of second cooling channels is a square, a rectangle, a rounded square or a rounded rectangle, and A cooling device in which each of the plurality of first cooling channels has a cross-sectional shape that is circular or elliptical.

5. In paragraph 4, The cross-sectional area of ​​each of the plurality of first cooling channels is equal to the cross-sectional area of ​​each of the plurality of hollows, and A cooling device in which the cross-sectional shape of each of the plurality of first cooling channels is the same as the cross-sectional shape of each of the plurality of hollows.

6. In paragraph 4, A cooling device in which each of the above plurality of main euros branches into three sub euros.

7. In paragraph 6, A cooling device wherein one of the three sub-euro streams is positioned corresponding to the first cooling channel and the remaining two sub-euro streams are positioned corresponding to the second cooling channel.

8. In paragraph 7, A cooling device in which one sub-channel corresponding to the first cooling channel is located between the remaining two sub-channels corresponding to the second cooling channels.

9. In paragraph 1, A cooling device wherein the manifold comprises a plurality of coupling holes positioned corresponding to the plurality of hollows on a side close to the heat sink and a side far from the heat sink.

10. In paragraph 9, A cooling device in which each of a plurality of coupling holes located far from the heat sink is alternately positioned with each of the plurality of main ducts.

11. In paragraph 1, A cooling device having a gasket interposed between the heat sink and the manifold.

12. Cooling device; and A battery cell assembly disposed on the cooling device and including a plurality of battery cells; Including, The above cooling device, a heat sink comprising a plurality of cooling channels and a plurality of cavities; and A manifold coupled to the above heat sink; Including, The above manifold, comprising a plurality of sub-flow channels positioned corresponding to the plurality of cooling channels on the side closer to the heat sink; comprising a plurality of main euros on the far side of the heat sink, and A battery pack wherein the plurality of sub-euro's are branched from the plurality of main euro's.

13. In paragraph 12, The plurality of cooling channels include a plurality of first cooling channels and a plurality of second cooling channels, The cross-sectional area of ​​each of the plurality of second cooling channels is larger than the cross-sectional area of ​​each of the plurality of first cooling channels, The cross-sectional shape of each of the plurality of second cooling channels is a square, a rectangle, a rounded square or a rounded rectangle, and A battery pack wherein each of the plurality of first cooling channels has a cross-sectional shape that is circular or elliptical.

14. In paragraph 13, The cross-sectional area of ​​each of the plurality of first cooling channels is equal to the cross-sectional area of ​​each of the plurality of hollows, and A battery pack wherein the cross-sectional shape of each of the plurality of first cooling channels is the same as the cross-sectional shape of each of the plurality of hollows.

15. In paragraph 13, Each of the above multiple main euros branches into three sub-euros, One of the three sub-euro's is positioned corresponding to the first cooling channel, and the remaining two sub-euro's are positioned corresponding to the second cooling channels, and A battery pack wherein one sub-euro corresponding to the first cooling channel is located between the remaining two sub-euro corresponding to the second cooling channels.

Images