Battery pack

Abstract

The invention relates to a battery pack. The battery pack comprises a base cover, a plurality of battery cells and a plate body, the plurality of battery cells are in contact with the base cover, and the plate body is arranged among the plurality of battery cells and comprises a plate body channel for cooling liquid to flow. And the plate body channel comprises a first heat exchange area which exchanges heat with the base cover and a second heat exchange area which is arranged below the first heat exchange area and exchanges heat with the battery cell.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0138948, filed with the Korean Intellectual Property Office on October 11, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to battery packs. Background Technology

[0004] In recent years, with increasing awareness of environmental issues and the crisis of dwindling oil resources, research and development of electric vehicles, as environmentally friendly vehicles, have received attention. Electric vehicles include plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), and fuel cell electric vehicles (FCEVs).

[0005] Electric vehicles may include battery casings that support battery cells. Meanwhile, electric vehicles utilize battery cells as a power source and require temperature regulation of the battery cells to ensure the performance of the electric vehicle.

[0006] Furthermore, thermal runaway can occur when the temperature of the battery cells rises, potentially causing fires inside electric vehicles. Therefore, it is essential to prevent thermal runaway. Consequently, there is an increasing demand for battery pack structures capable of controlling the temperature of the battery cells. Summary of the Invention

[0007] This application is made to address the aforementioned problems existing in the related technologies, while retaining the advantages achieved by the related technologies.

[0008] This application provides a battery pack that allows coolant to circulate automatically based on density differences according to temperature through plate channels disposed on a plate between battery cells.

[0009] The technical problems to be solved by this application are not limited to those mentioned above, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art through the following description.

[0010] According to an aspect of this application, a battery pack includes: a base cover; a plurality of battery cells in contact with the base cover; and a plate disposed between the plurality of battery cells, and including a plate channel for coolant flow, wherein the plate channel includes a first heat exchange region that exchanges heat with the base cover and a second heat exchange region disposed on one side of the first heat exchange region along the vertical direction of the plate and that exchanges heat with the battery cells.

[0011] The plate channel can be formed as a closed channel for coolant circulation.

[0012] The first heat exchange region may include: an end portion located upstream of the first heat exchange region relative to the flow direction of the coolant; and another end portion located downstream of the first heat exchange region relative to the flow direction of the coolant; and the other end portion of the first heat exchange region is disposed on one side of the first end portion of the first heat exchange region along the vertical direction of the plate.

[0013] The second heat exchange region may include: an end portion located upstream of the second heat exchange region relative to the flow direction of the coolant; and another end portion located downstream of the second heat exchange region relative to the flow direction of the coolant; and the other end portion of the second heat exchange region is disposed on one side of the end portion of the second heat exchange region along the vertical direction of the plate.

[0014] The battery pack may further include: a side member that covers one side of the plurality of battery cells, and on the plate, a first heat exchange region is disposed closer to the side member than a second heat exchange region.

[0015] The battery pack may further include: a spanning member that contacts the base cover and extends across the space where multiple battery cells are disposed, and on the plate, a second heat exchange area is disposed closer to the spanning member than a first heat exchange area.

[0016] The side members may be configured as a pair, and the battery pack may further include a spanning member disposed between the pair of side members and extending to span the space where a plurality of battery cells are disposed. The plurality of battery cells may include: a first plurality of battery cells disposed between one of the pair of side members and the spanning member; and a second plurality of battery cells disposed between the other of the pair of side members and the spanning member. Plate channels of the plate disposed between the first plurality of battery cells and plate channels of the plate disposed between the second plurality of battery cells may be configured symmetrically with respect to the spanning member.

[0017] The plate channel may further include: a first connecting region that connects one end portion of the first heat exchange region to the second heat exchange region; and a second connecting region that connects the other end portion of the first heat exchange region to the second heat exchange region.

[0018] The first connecting region can extend along its horizontal direction.

[0019] The second connection region may include a portion extending from the other end portion of the first heat exchange region toward the second heat exchange region in an inclined direction, forming a predetermined angle with the longitudinal direction and the vertical direction of the plate.

[0020] The first heat exchange region may include a portion that is meandering in the vertical direction or the longitudinal direction of the plate.

[0021] The second heat exchange region may include a portion that is meandering in the vertical direction or the longitudinal direction of the plate.

[0022] The first heat exchange region may include a portion of the plate extending from one end portion in the longitudinal direction of the plate toward another end portion in the longitudinal direction of the plate.

[0023] The second heat exchange region may include a portion of the plate extending from one end portion in the longitudinal direction of the plate toward another end portion in the longitudinal direction of the plate.

[0024] The second heat exchange region may extend from one end portion of the plate in a meandering shape along the vertical direction to the other end portion of the plate in the longitudinal direction.

[0025] The base cover can be disposed on one side of the plate channel along the vertical direction of the plate.

[0026] The base cover may include a base channel formed therein.

[0027] The battery pack may further include surface pressure members disposed between and supporting the battery cells. Attached Figure Description

[0028] The above and other objects, features and advantages of this application will become more apparent from the following detailed description taken in conjunction with the accompanying drawings:

[0029] Figure 1 This is a perspective view of a battery pack disposed in an electric vehicle according to an exemplary embodiment of this application.

[0030] Figure 2 This is an exploded perspective view of a battery pack according to an exemplary embodiment of this application.

[0031] Figure 3 This is a perspective view of a battery cell stack according to an exemplary embodiment of this application.

[0032] Figure 4 This is an exploded perspective view of a battery cell stack according to an exemplary embodiment of this application.

[0033] Figure 5 This is a perspective view of a base cover and a battery cell stack according to an exemplary embodiment of this application.

[0034] Figure 6 This is a front view of a plate body according to an exemplary embodiment of this application.

[0035] Figure 7 This is a front view of the plate according to another embodiment of this application.

[0036] Figure 8 This is a front view of the plate according to another embodiment of this application.

[0037] Figure 9 This is a front view of the plate according to another embodiment of this application.

[0038] Figure 10 This is a front view of the plate according to another embodiment of this application.

[0039] Figure 11 It is along Figure 1 The diagram shows a vertical cross-section of the battery pack taken by line A-A'.

[0040] Figure 12 Is along with Figure 1 The vertical cross-section of the battery pack is shown by the line A-A' perpendicular to the line shown. Detailed Implementation

[0041] In the following description, various exemplary embodiments of this application will be described in detail with reference to the exemplary drawings. When adding reference numerals to components in each drawing, it should be noted that even if the same or equivalent components are shown in other drawings, the same or equivalent components are represented by the same reference numerals. Furthermore, in describing exemplary embodiments of this application, detailed descriptions of known features or functions will be omitted to avoid unnecessarily obscuring the main points of this application.

[0042] In describing components according to exemplary embodiments of this application, terms such as first, second, "A", "B", (a), and (b) may be used. These terms are intended only to distinguish one component from another, and the terms do not limit the nature, order, or sequence of the components. Unless otherwise defined, all terms used herein, including technical or scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Such terms as defined in common dictionaries shall be interpreted as having the same meaning as in the context of the relevant technical field, and shall not be interpreted as having an imaginary or overly formal meaning unless expressly defined in this application.

[0043] In the following text, the implementation scheme of this application will refer to Figures 1 to 12 Please provide a detailed description. The first direction, the second direction, and the third direction can be directions perpendicular to each other.

[0044] Figure 1 This is a perspective view of a battery pack disposed in an electric vehicle according to an exemplary embodiment of this application. Figure 2 This is an exploded perspective view of a battery pack according to an exemplary embodiment of this application. Figure 3 This is a perspective view of a battery cell stack according to an exemplary embodiment of this application. Figure 4 This is an exploded perspective view of a battery cell stack according to an exemplary embodiment of this application. Figure 5 This is a perspective view of a base cover and a battery cell stack according to an exemplary embodiment of this application. Figure 6 This is a front view of a plate body according to an exemplary embodiment of this application.

[0045] Reference Figures 1 to 6 The battery pack 100 may include a battery housing 200, a battery pack cover 300 that engages with the battery housing 200, and a battery cell stack 400 disposed in the battery housing 200.

[0046] The battery housing 200 may define a space for accommodating the battery cell stack 400. The battery housing 200 may include a base cover 210, a front member 220, a rear member 230, a side member 240, a partition member 250, and a spanning member 260.

[0047] The base cover 210 can support the battery cell stack 400. The base cover 210 may include a base channel 211 for coolant flow.

[0048] The front member 220 can be supported by the base cover 210 and can cover the area of ​​the battery cell stack 400 facing the first direction (facing the X direction). The rear member 230 can be supported by the base cover 210 and can cover the area of ​​the battery cell stack 400 facing the other side of the first direction (facing the direction opposite to the X direction).

[0049] Side members 240 may be disposed on opposite sides of the base cover 210 in the second direction (Y direction or the direction opposite to the Y direction) and may be supported by the base cover 210. Side members 240 may be configured as a pair and may cover opposite sides of the battery cell stack 400 in the second direction (Y direction or the direction opposite to the Y direction). The pair of side members 240 may cover two opposite regions of the battery cell stack 400 in the second direction (Y direction or the direction opposite to the Y direction).

[0050] The separator 250 may be disposed between the front member 220 and the rear member 230. The separator 250 may extend between the front member 220 and the rear member 230 in a second direction (Y direction or the direction opposite to Y direction).

[0051] The separator 250 can be disposed between a plurality of battery cell stacks 400 and can support the battery cell stacks 400. Each separator 250 can define a space for accommodating a pair of battery cell stacks 400 arranged parallel to each other along a first direction (the X direction or the direction opposite to the X direction). The separators 250 can be spaced apart from each other in the first direction (the X direction or the direction opposite to the X direction).

[0052] Crossing component 260 (reference) Figure 11 It can be disposed between a pair of side members 240 and can extend from the rear member 230 toward the front member 220. Each of the spanning members 260 can be disposed between a pair of adjacent separating members 250.

[0053] The bridging component 260 can contact the base cover 210 and can extend to span the space where multiple battery cell stacks 400 are disposed. The bridging component 260 and the separator component 250 can extend in directions perpendicular to each other. (See reference 212) Figure 12 The area that can be set on the base cover 210 and separated from each other by the dividing member 250 and the spanning member 260.

[0054] The battery cell stack 400 may include a first battery cell stack 401 and a second battery cell stack 402 separated from each other by a spanning member 260. Each of the battery cell stacks 400 may include a plurality of battery cells 410.

[0055] The battery cell 410 can extend along a second direction (Y direction or the opposite direction to Y direction) and can be arranged along a first direction (X direction or the opposite direction to X direction). The battery cell 410 can be implemented as a packaged lithium-ion battery or a prismatic lithium-ion battery, but is not limited to these. Multiple battery cells 410 can be housed in the battery casing 200 without a separate module frame.

[0056] In other words, the battery cell 410 according to the exemplary embodiment of this application can be disposed in the battery pack 100 in a CTP (cell-to-pack) structure. However, the method of installing the battery cell 410 in the battery pack 100 is not limited to this, and the battery cell 410 can be housed in the battery housing 200 using a separate modular frame.

[0057] The battery cell stack 400 can be disposed in an area separated from each other by a separator 250 and a crossing member 260. The battery cell stack 400 can be spaced apart from each other in a first direction (X direction or the opposite direction) using the separator 250 located therebetween. The battery cell stack 400 may include a first battery cell stack 401 and a second battery cell stack 402, which are arranged parallel to each other in a second direction (Y direction or the opposite direction) using the crossing member 260 located therebetween.

[0058] Meanwhile, during the manufacturing of the battery pack 100, the battery pack cover 300 can be engaged with the battery housing 200 after the battery cells 410 are disposed within the battery housing 200. Afterward, the battery pack 100 can be installed in an inverted state in the electric vehicle. In other words, when the battery pack 100 is installed in the electric vehicle, the battery pack cover 300 can be positioned facing the road surface.

[0059] The reason why the battery pack 100 is installed in the electric vehicle in an inverted state is that, in the event of a fire in the battery pack 100, the flames or high-temperature gases can be discharged to the bottom of the electric vehicle, or it is advantageous in terms of protecting the battery cells 410.

[0060] More specifically, the battery pack 100 is typically positioned below the occupants of the electric vehicle, and depending on the configuration of the battery pack cover 300 facing the occupants, any flames or high-temperature gases generated within the battery pack 100 will flow towards the occupants through the battery pack cover 300. Conversely, when the battery pack cover 300 in the electric vehicle is positioned facing the road surface, any flames or high-temperature gases generated within the battery pack 100 can flow towards the road surface, thereby improving occupant safety.

[0061] Furthermore, when the battery pack cover 300 of the battery pack 100 faces the occupant, the battery pack cover 300 may be damaged due to the weight of the occupant. Conversely, according to the following structure: the base cover 210 is provided on one side of the battery housing 200 along the third direction (Z direction), such that the battery pack cover 300 faces the road surface, and the battery pack cover 300 is provided on the other side of the battery housing 200 along the third direction (opposite to the Z direction); the impact force from the weight of the occupant may be applied to the base cover 210. In this case, since the base cover 210 is more robust than the battery pack cover 300, the battery pack 100 will not be damaged.

[0062] Furthermore, due to the structure of the base channel 211 through which the impact force is transmitted to the base cover 210, the impact force can be prevented from being transmitted to the battery cell 410 when the base cover 210 is damaged, compared to when the battery pack cover 300 is damaged. Therefore, damage to the battery cell 410 can be prevented.

[0063] As described above, when the battery pack 100 is installed in an electric vehicle in an inverted state, the battery pack cover 300 can be installed near the road surface, and the base cover 210 can be installed near the user.

[0064] like Figure 3 and Figure 4 As shown, each of the battery cell stack 400 may include a plurality of battery cells 410, surface pressure members 420, sensing components 430, end plates 440 and plate bodies 500.

[0065] Multiple battery cells 410 can contact the base cover 210 and can be disposed in the battery housing 200.

[0066] The surface pressure member 420 can be disposed between multiple battery cells 410 and can support the battery cells 410. The surface pressure member 420 can be disposed between the battery cells 410 and can contact the battery cells 410.

[0067] The sensing components 430 can be disposed on opposite sides in a direction perpendicular to the direction in which the multiple battery cells 410 are stacked. The sensing components 430 may include a sensing frame, a busbar, and a sensing board, and the busbar and sensing board may be supported by the sensing frame and electrically connected to the battery cells 410.

[0068] End plates 440 can be disposed on opposite sides of the direction in which multiple battery cells 410 are stacked. End plates 440 and surface pressure members 420 can provide surface pressure to battery cells 410 to prevent expansion of battery cells 410.

[0069] The battery cell stack 400 may include a plate 500 disposed alternately between the battery cells 410 and the surface pressure member 420. The plate 500 may be a component that contacts the battery cells 410 to cool the battery cells 410.

[0070] like Figure 5 As shown, the battery cell stack 400 can contact the base cover 210. The plate 500 of the battery cell stack 400 can contact the base cover 210. The plate 500 can absorb heat from the battery cell 410 and can transfer heat to the base channel 211 of the base cover 210. The base cover 210 can exchange heat with the plate 500.

[0071] like Figure 6 As shown, the plate body 500 can be disposed between multiple battery cells 410, and each of the plate body 500 can include a plate body channel 510, the plate body channel 510 being supplied to the base channel 211 (see reference). Figure 11Different coolants flow through the plate channel 510 and the base channel 211. That is, the plate channel 510 and the base channel 211 may not be fluidly connected to each other. The plate channel 510 can be formed as a closed channel for coolant circulation.

[0072] In the following text, the second direction (Y direction or the direction opposite to Y direction) on the plate 500 is called the longitudinal direction of the plate 500, and the third direction (Z direction or the direction opposite to Z direction) on the plate 500 is called the vertical direction of the plate 500.

[0073] The plate channel 510 can absorb heat from the battery cell 410 and release heat to the base cover 210. The plate channel 510 may include a first heat exchange region 520 that exchanges heat with the base cover 210 and a second heat exchange region 530 that exchanges heat with the battery cell 410.

[0074] In other words, the first heat exchange region 520 can be a region for releasing heat to the base cover 210 or the outside. Conversely, the second heat exchange region 530 can be a region for absorbing heat from the battery cell 410.

[0075] The second heat exchange region 530 can be located below the first heat exchange region 520. In other words, compared with the first heat exchange region 520, the second heat exchange region 530 can be located on the opposite side along the third direction (opposite to the Z direction).

[0076] In this situation, the temperature of the coolant flowing through the second heat exchange region 530 can be higher than the temperature of the coolant flowing through the first heat exchange region 520. Due to the thermosiphon effect, the density of the coolant flowing through the first heat exchange region 520 can be higher than the density of the coolant flowing through the second heat exchange region 530.

[0077] Due to the density difference at different temperatures, the coolant flowing through the first heat exchange zone 520 tends to flow downwards, while the coolant flowing through the second heat exchange zone 530 tends to flow upwards. Therefore, the coolant flowing through the first heat exchange zone 520 and the second heat exchange zone 530 can circulate on the plate 500.

[0078] In the battery pack 100, the first heat exchange region 520 may be located outside the second heat exchange region 530. That is, on the plate 500, the first heat exchange region 520 may be located closer to the side member 240 than the second heat exchange region 530. In other words, on the plate 500, the second heat exchange region 530 may be located closer to the crossing member 260 than the first heat exchange region 520.

[0079] The reason why the first heat exchange region 520 is located outside the second heat exchange region 530 may be that when the coolant flowing through the first heat exchange region 520 exchanges heat with the outside air located on the outside of the electric vehicle in the width direction, the heat in the plate channel 510 can be easily released to the outside of the electric vehicle.

[0080] Compared to when the first heat exchange region 520 only exchanges heat with the base cover 210, the heat dissipation effect of the first heat exchange region 520 can be improved by the structure described above.

[0081] As described above, the coolant flowing through the plate channel 510 can automatically circulate even without any external force, releasing heat through the first heat exchange region 520 and absorbing heat through the second heat exchange region 530. Therefore, even without any external force, the temperature of the battery cell 410 can be regulated, thereby preventing fires in the battery pack 100 and performance degradation of the battery cell 410.

[0082] More specifically, the first heat exchange region 520 may include an end portion 521 located upstream of the first heat exchange region 520 relative to the flow direction of the coolant, and another end portion 522 located downstream of the first heat exchange region 520 relative to the flow direction of the coolant.

[0083] In order to allow the coolant to circulate in the first heat exchange zone 520, the other end portion 522 of the first heat exchange zone 520 may be located on one side in the third direction (Z direction) compared to one end portion 521 of the first heat exchange zone 520. That is, the other end portion 522 of the first heat exchange zone 520 may be located above one end portion 521 of the first heat exchange zone 520.

[0084] Locally, the temperature of the coolant flowing through the upstream side of the first heat exchange region 520 can be higher than the temperature of the coolant flowing through the downstream side of the first heat exchange region 520. Correspondingly, the density of the coolant flowing through the upstream side of the first heat exchange region 520 can be lower than the density of the coolant flowing through the downstream side of the first heat exchange region 520.

[0085] Therefore, the flow of coolant in the first heat exchange region 520 can be guided from one end portion 521 of the first heat exchange region 520 to the other end portion 522 of the first heat exchange region 520.

[0086] Similarly, the second heat exchange region 530 may include an end portion 531 located upstream of the second heat exchange region 530 relative to the flow direction of the coolant, and another end portion 532 located downstream of the second heat exchange region 530 relative to the flow direction of the coolant.

[0087] In order to allow the coolant to circulate in the second heat exchange zone 530, the other end portion 532 of the second heat exchange zone 530 may be located on one side in the third direction (Z direction) compared to one end portion 531 of the second heat exchange zone 530. That is, the other end portion 532 of the second heat exchange zone 530 may be located above one end portion 531 of the second heat exchange zone 530.

[0088] Similarly, the temperature of the coolant flowing through the upstream side of the second heat exchange region 530 can be lower than the temperature of the coolant flowing through the downstream side of the second heat exchange region 530. The density of the coolant flowing through the upstream side of the second heat exchange region 530 can be higher than the density of the coolant flowing through the downstream side of the second heat exchange region 530.

[0089] Therefore, the flow of coolant in the second heat exchange region 530 can be guided from one end portion 531 to the other end portion 532 of the second heat exchange region 530. That is, when the coolant flows through the second heat exchange region 530, the temperature of the coolant can increase and the density of the coolant can decrease. Therefore, the flow of coolant through the second heat exchange region 530 can be guided.

[0090] The plate channel 510 may include a first connection area 540 and a second connection area 550. The first connection area 540 connects one end portion 521 of the first heat exchange area 520 to the other end portion 532 of the second heat exchange area 530. The second connection area 550 connects the other end portion 522 of the first heat exchange area 520 to one end portion 531 of the second heat exchange area 530.

[0091] The first connection region 540 can extend from another end portion 532 of the second heat exchange region 530 toward the side member 240 to one end portion 521 of the first heat exchange region 520. The first connection region 540 can extend horizontally on the plate body 500. That is, the first connection region 540 can extend longitudinally on the plate body 500.

[0092] The second connection region 550 may extend from the other end portion 522 of the first heat exchange region 520 toward the battery pack cover 300 and the crossing member 260 to one end portion 531 of the second heat exchange region 530. The second connection region 550 may include a portion extending in an inclined direction from the other end portion 522 of the first heat exchange region 520 toward the second heat exchange region 530 to form a specific angle with the longitudinal direction and the downward direction of the plate 500.

[0093] According to the structure described above, the first heat exchange region 520 and the second heat exchange region 530 may include portions that are meandering along the vertical direction or the longitudinal direction of the plate 500.

[0094] In this way, the first heat exchange region 520 and the second heat exchange region 530 can ensure sufficient channel length for heat exchange on the plate 500, so that the first heat exchange region 520 can exchange heat with the base cover 210 and the outside air, and the second heat exchange region 530 can exchange heat with the battery cell 410.

[0095] The first heat exchange region 520 and the second heat exchange region 530 may include a meandering shape along the longitudinal direction of the plate 500, thereby ensuring the channel length in the longitudinal direction of the plate 500.

[0096] The first heat exchange region 520 and the second heat exchange region 530 may include portions extending along the longitudinal direction of the plate 500 and portions formed at least once in the vertical direction.

[0097] Figure 7 This is a front view of the plate according to another embodiment of this application.

[0098] Reference Figure 7 ,Apart from Figure 7 Plate 500 includes having with Figure 6 In addition to the second heat exchange region 530 of the plate body 500 having a different shape, the plate body 500 may include a second heat exchange region 530 with a different shape. Figure 6 The shape corresponds to the shape of plate 500. Therefore, Figure 7 The description of the first heat exchange region 520, the first connection region 540, and the second connection region 550 of the plate 500 is referenced. Figure 6 Description of the first heat exchange region 520, the first connection region 540 and the second connection region 550 of the plate 500.

[0099] Reference Figure 7 The second heat exchange region 530 of the plate 500 can extend from one end portion 531 to another end portion 532 in a meandering shape along the vertical direction.

[0100] The first heat exchange region 520 may include a portion extending along the longitudinal direction of the plate 500 and at least one portion formed parallel to the vertical direction. The second heat exchange region 530 may include a portion extending along the vertical direction of the plate 500 and at least one portion formed parallel to the longitudinal direction of the plate 500.

[0101] Figure 8 This is a front view of the plate according to another embodiment of this application.

[0102] Reference Figure 8 The plate 500 may include having a similar design to the plate. Figure 6 The shapes of the first heat exchange region 520 and the first connection region 540 of the plate 500 correspond to the shapes of the first heat exchange region 520 and the first connection region 540. Therefore, Figure 8 The description of the first heat exchange region 520 and the first connection region 540 of the plate 500 is referenced. Figure 6 Description of the first heat exchange region 520 and the first connection region 540 of the plate 500.

[0103] Reference Figure 8 The second heat exchange region 530 of the plate 500 may include a portion of the plate 500 extending from one end portion to another along the longitudinal direction of the plate 500. In this case, the second connection region 550 of the plate 500 may include: a portion extending along one end portion of the plate 500 in the longitudinal direction and a portion extending in the vertical direction of the plate 500.

[0104] The first heat exchange region 520 and the second heat exchange region 530 may include portions extending along the longitudinal direction of the plate 500 and portions formed at least once in the vertical direction.

[0105] The above description Figures 6 to 8 In the case of plate channel 510, although the length of the channel is not guaranteed to reach its maximum, the coolant can circulate smoothly in plate channel 510.

[0106] Figure 9 This is a front view of the plate according to another embodiment of this application.

[0107] Reference Figure 9 Each of the first heat exchange region 520 and the second heat exchange region 530 may include a portion of the plate 500 extending from one end portion toward the other along the longitudinal direction of the plate 500.

[0108] The first heat exchange region 520 and the second heat exchange region 530 may include portions extending along the longitudinal direction of the plate 500 and portions formed at least once in the vertical direction.

[0109] In this configuration, the first connecting region 540 can extend along the longitudinal direction of the plate 500, and the second connecting region 550 can extend along the vertical direction of the plate 500.

[0110] Figure 10 This is a front view of the plate according to another embodiment of this application.

[0111] Reference Figure 10 Each of the first heat exchange region 520 and the second heat exchange region 530 may include a portion of the plate 500 extending from one end portion toward the other along the longitudinal direction of the plate 500.

[0112] The first heat exchange region 520 may include a portion extending along the longitudinal direction of the plate 500 and at least one portion formed parallel to the vertical direction of the plate 500. The second heat exchange region 530 may include a portion extending along the vertical direction of the plate 500 and at least one portion formed parallel to the longitudinal direction of the plate 500.

[0113] In this case, the first connecting region 540 can extend along the longitudinal direction of the plate 500, and the second connecting region 550 can extend along the vertical direction of the plate 500.

[0114] Figure 9 and Figure 10 The plate 500 may include having a ratio Figures 6 to 8 The first heat exchange region 520 or the second heat exchange region 530 of the plate 500 has a longer channel length than the first heat exchange region 520 or the second heat exchange region 530, thereby Figure 9 and Figure 10 The plate channel 510 can smoothly absorb and release heat.

[0115] Figure 11 It is along Figure 1 The diagram shows a vertical cross-section of the battery pack taken by line A-A'. Figure 12 Is along with Figure 1 The vertical cross-section of the battery pack is shown by the line A-A' perpendicular to the line shown.

[0116] Reference Figure 11 and Figure 12The multiple battery cell stacks 400 may include a first battery cell stack 401 and a second battery cell stack 402. The first battery cell stack 401 is disposed between one of a pair of side members 240 and a crossing member 260, and the second battery cell stack 402 is disposed between the other of the pair of side members 240 and the crossing member 260.

[0117] The plate channel 510 of the plate 500 disposed between the first plurality of battery cells stacked in the first battery cell stack 401 (refer to) Figure 6 The plate channel 510 between the plate 500 and the second plurality of battery cells stacked in the second battery cell stack 402 (see reference) Figure 6 It can be set to be symmetrical to each other with respect to the spanning component 260.

[0118] In other words, the first heat exchange region 520 of the plate 500 belonging to the first battery cell stack 401 and the first heat exchange region 520 of the plate 500 belonging to the second battery cell stack 402 can be configured to be adjacent to the base cover 210 and the side member 240.

[0119] Furthermore, the second heat exchange region 530 of the plate 500 belonging to the first battery cell stack 401 and the second heat exchange region 530 of the plate 500 belonging to the second battery cell stack 402 can be configured to be adjacent to the battery pack cover 300 and the crossing member 260.

[0120] The base cover 210 can be disposed on the upper side of the plate channel 510, and the battery pack cover 300 can be disposed on the lower side of the plate channel 510. The gap filler 212 can be disposed between the base cover 210 and the plate 500, and the base channel 211 can be disposed inside the base cover 210.

[0121] Therefore, the heat of the coolant flowing in the plate channel 510 can be transferred to the coolant flowing in the base channel 211 through the gap filler 212, thereby regulating the temperature of the battery cell 410.

[0122] Due to the structure described above, fires can be prevented in the battery pack 100 and the performance of the battery pack 100 can be prevented from degrading.

[0123] As described above, due to density differences at different temperatures, the coolant can automatically circulate through channels in the plates between the battery cells. Therefore, heat can be automatically exchanged within the battery cells, preventing fires from occurring within them.

[0124] The first heat exchange zone can be located above the second heat exchange zone. Accordingly, due to the thermosiphon effect, the coolant flowing through the plate channel can circulate even without external force.

[0125] The first heat exchange zone can be positioned closer to the base cover than the second heat exchange zone. Accordingly, heat exchange can be guided between the first heat exchange zone and the base cover.

[0126] The first heat exchange zone can be positioned closer to the side member than the second heat exchange zone. Accordingly, the first heat exchange zone can be guided to exchange heat with the outside.

[0127] Furthermore, this application can provide various effects, either directly or indirectly.

[0128] In the foregoing, although this application has been described with reference to exemplary embodiments and the accompanying drawings, this application is not limited thereto, and various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of this application as defined in the claims herein.

[0129] Therefore, the exemplary embodiments of this application are provided to explain the spirit and scope of this application, and not to limit it, so that the spirit and scope of this application are not limited by these embodiments. The scope of this application should be interpreted based on the appended claims, and all technical concepts within the scope of the claims should be included within the scope of this application.

Claims

1. A battery pack comprising: Base cover; Multiple battery cells are in contact with the base cover; as well as A plate, disposed between the plurality of battery cells, includes plate channels for the flow of coolant. The plate channel includes: The first heat exchange zone exchanges heat with the base cover; The second heat exchange zone is located on one side of the first heat exchange zone along the vertical direction of the plate and exchanges heat with the battery cell.

2. The battery pack according to claim 1, wherein, The plate channel forms a closed channel for coolant circulation.

3. The battery pack according to claim 1, wherein, The first heat exchange area includes: An end portion, located upstream of the first heat exchange zone relative to the flow direction of the coolant; and The other end portion is located downstream of the first heat exchange zone relative to the flow direction of the coolant; The one end portion is fluidly connected to the other end portion, and the other end portion of the first heat exchange region is disposed on one side of the one end portion of the first heat exchange region along the vertical direction of the plate.

4. The battery pack according to claim 1, wherein, The second heat exchange zone includes: One end portion, located upstream of the second heat exchange zone relative to the flow direction of the coolant; and The other end portion is located downstream of the second heat exchange zone relative to the flow direction of the coolant; The one end portion is fluidly connected to the other end portion, and the other end portion of the second heat exchange region is disposed on one side of the one end portion of the second heat exchange region along the vertical direction of the plate.

5. The battery pack according to claim 1, further comprising: Side member, which covers one side of the plurality of battery cells. Specifically, on the plate, the first heat exchange area is positioned closer to the side member than the second heat exchange area.

6. The battery pack according to claim 1, further comprising: The component spans across the base cover and extends across the space where multiple battery cells are housed. Specifically, on the plate, the second heat exchange area is positioned closer to the crossing component than the first heat exchange area.

7. The battery pack according to claim 5, wherein, The side members are configured as a pair. The battery pack further includes a spanning member disposed between a pair of side members and extending to span the space where multiple battery cells are disposed. The plurality of battery cells include: The first plurality of battery cells are disposed between one of a pair of side members and a crossing member; and The second plurality of battery cells are disposed between another of a pair of side members and a cross member; The plate channel of the plate disposed between the first plurality of battery cells and the plate channel of the plate disposed between the second plurality of battery cells are configured to be symmetrical to each other with respect to the crossing component.

8. The battery pack according to claim 3, wherein, The plate channel further includes: A first connection region, which connects one end portion of the first heat exchange region to a second heat exchange region; and The second connection region connects to the other end portion of the first heat exchange region and the second heat exchange region.

9. The battery pack according to claim 8, wherein, The first connection area extends along the horizontal direction of the battery pack.

10. The battery pack according to claim 8, wherein, The second connection region includes a portion extending from the other end portion of the first heat exchange region toward the second heat exchange region in an inclined direction, forming a predetermined angle with the longitudinal direction and the vertical direction of the plate.

11. The battery pack according to claim 1, wherein, The first heat exchange region includes a portion of the plate that is meandering in the vertical direction or the longitudinal direction of the plate.

12. The battery pack according to claim 1, wherein, The second heat exchange zone includes a portion of the plate that is meandering in the vertical direction or the longitudinal direction of the plate.

13. The battery pack according to claim 1, wherein, The first heat exchange region includes a portion of the plate extending from one end portion in the longitudinal direction of the plate toward another end portion in the longitudinal direction of the plate.

14. The battery pack according to claim 1, wherein, The second heat exchange region includes a portion of the plate extending from one end portion in the longitudinal direction of the plate toward another end portion in the longitudinal direction of the plate.

15. The battery pack according to claim 1, wherein, The second heat exchange region extends in a meandering shape along the vertical direction from one end portion of the plate in the longitudinal direction to the other end portion of the plate in the longitudinal direction.

16. The battery pack according to claim 1, wherein, The base cover is located on one side of the plate channel along the vertical direction of the plate.

17. The battery pack according to claim 1, wherein, The base cover includes a base channel formed within the base cover.

18. The battery pack according to claim 1, further comprising a surface pressure member disposed between and supporting the battery cells.

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