Blade battery cell module, battery pack and vehicle

Abstract

The utility model relates to the technical field of batteries, and provides a blade battery cell module, a battery pack and a vehicle. The blade battery cell module comprises a plurality of blade battery cells and a liquid cooling system, wherein the plurality of blade battery cells are stacked along a first direction; the liquid cooling system comprises a plurality of cold plates which are arranged at intervals in the first direction, at least part of the cold plates are clamped between every two adjacent blade battery cells, the length direction of the cold plates is parallel to the length direction of the blade battery cells, and the side, in the length direction, of each cold plate is provided with an extending part extending to the upper area of the corresponding blade battery cell. A cooling flow channel is formed in the cold plate, and a liquid inlet and a liquid outlet which communicate with the cooling flow channel are formed in the extending part. According to the blade battery cell module, the cold plate is clamped between every two adjacent blade battery cells, the cold plates are used for cooling the large faces of the blade battery cells, the heat exchange efficiency is improved, the liquid inlets and the liquid outlets of the cold plates are formed in the areas above the blade battery cells, therefore, pole columns at the two ends of the blade battery cells are avoided, and reasonable arrangement of the cold plates in the blade battery cell module is achieved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a blade cell module, a battery pack, and a vehicle. Background Technology

[0002] From a market perspective, the application of power batteries is becoming increasingly widespread. People are paying more and more attention to the thermal safety and fast-charging performance of power batteries; therefore, the presence of an excellent thermal management system determines whether a battery pack can achieve high performance. Among them, lithium iron phosphate (LFP) blade batteries are becoming increasingly widely used due to their advantages such as high energy density and compact size, and the demand for fast charging of LFP blade batteries is gradually increasing.

[0003] However, due to the structural limitations of the blade battery's terminals, most package solutions use a bottom-plus-top cooling method. This cooling method has a small heat exchange area and low heat exchange efficiency. In order to cope with extreme thermal runaway, it is still necessary to place thermal insulation materials between the cells to prevent the spread of heat. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a blade cell module, a battery pack, and a vehicle.

[0005] The first aspect of this application provides a blade battery module, comprising:

[0006] Multiple blade cells, wherein the multiple blade cells are stacked along a first direction;

[0007] A liquid cooling system includes multiple cold plates, which are spaced apart along a first direction. At least some of the cold plates are sandwiched between two adjacent blade cells. The length direction of the cold plates is parallel to the length direction of the blade cells. One side of the cold plate along the length direction has an extension extending to the area above the blade cells. A cooling channel is formed inside the cold plate. An inlet and an outlet communicating with the cooling channel are formed on the extension.

[0008] Optionally, both the liquid inlet and the liquid outlet penetrate the cold plate along the first direction;

[0009] The liquid cooling system includes multiple connecting pipes, at least some of which are sandwiched between two adjacent cold plates. Each connecting pipe has an inlet channel and an outlet channel. The inlet channel is connected to the inlet of the two adjacent cold plates, and the outlet channel is connected to the outlet of the two adjacent cold plates.

[0010] Optionally, a first sealing ring and a second sealing ring are provided between adjacent connecting pipes and cold plates. The first sealing ring seals the connection between the liquid inlet channel and the liquid inlet, and the second sealing ring seals the connection between the liquid outlet channel and the liquid outlet.

[0011] Optionally, the cold plate includes a first plate and a second plate that interlock, with a portion of at least one of the first plate and the second plate protruding away from the other to form the cooling channel between the first plate and the second plate.

[0012] The cooling channel has a channel inlet and a channel outlet. The channel inlet is formed by the first plate protruding in a direction away from the second plate and is connected to the liquid inlet. The channel outlet is formed by the second plate protruding in a direction away from the first plate and is connected to the liquid outlet.

[0013] On one side surface of the cold plate, the first sealing ring is disposed around the liquid inlet and the flow channel inlet, and the second sealing ring is disposed around the liquid outlet; on the other side surface of the cold plate, the first sealing ring is disposed around the liquid inlet, and the second sealing ring is disposed around the liquid outlet and the flow channel outlet.

[0014] Optionally, the cold plate includes a first plate and a second plate that interlock, with a portion of at least one of the first plate and the second plate protruding away from the other to form the cooling channel between the first plate and the second plate.

[0015] A support structure is provided between the first plate and the second plate, and the liquid inlet and the liquid outlet both penetrate the first plate, the support structure and the second plate;

[0016] The cooling channel has a channel inlet and a channel outlet. The channel inlet is connected to the liquid inlet through the support structure, and the channel outlet is connected to the liquid outlet through the support structure. The first sealing ring is located around the liquid inlet, and the second sealing ring is located around the liquid outlet.

[0017] Optionally, one of the adjacent connecting pipes and the cold plate is provided with a plug-in portion, and the other is provided with a plug-in hole, wherein the plug-in portion and the plug-in hole are plugged in and positioned.

[0018] Optionally, the interior of the cold plate is provided with a plurality of cooling channels, each of the plurality of cooling channels having a channel inlet and a channel outlet, the channel inlets of the plurality of cooling channels being connected to the liquid inlet, and the channel outlets of the plurality of cooling channels being connected to the liquid outlet.

[0019] A second aspect of this application provides a battery pack including a blade cell module as described in any of the preceding claims.

[0020] Optionally, the number of blade battery modules is two, and the two blade battery modules are arranged side by side along the second direction, which is perpendicular to the first direction;

[0021] The liquid inlets and outlets of the plurality of cold plates of each blade cell module are located in the area above one end of the blade cell module near the other blade cell module.

[0022] A third aspect of this application provides a vehicle including the battery pack as described above.

[0023] The technical solution provided in this application has the following advantages compared with the prior art:

[0024] The blade cell module, battery pack, and vehicle provided in this application utilize a cold plate sandwiched between two adjacent blade cells to cool the large surface area of ​​the blade cells. This increases the heat exchange area between the cold plate and the blade cells, improving heat exchange efficiency and thus rapidly and efficiently reducing the surface temperature of the blade cells. This meets the heat dissipation requirements of fast charging of the battery pack and effectively prevents heat spread when thermal runaway occurs in the battery pack. Furthermore, the cold plate has an extension extending to the area above the blade cells along its length. Cooling channels are formed inside the cold plate, and the extension has an inlet and an outlet communicating with the cooling channels. This arrangement places the inlet and outlet of the cold plate above the blade cells, thus avoiding the terminals at both ends of the blade cells and achieving a reasonable arrangement of the cold plate in the blade cell module. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an exploded view of a battery pack according to an embodiment of this application;

[0028] Figure 2 for Figure 1 A schematic diagram of the blade cell module of the battery pack shown;

[0029] Figure 3 for Figure 2 A schematic diagram of the liquid cooling system for the blade battery module shown.

[0030] Figure 4 for Figure 3 A first-view structural schematic diagram of the cold plate of the liquid cooling system shown.

[0031] Figure 5 for Figure 4 A partially enlarged structural schematic diagram of the cold plate shown;

[0032] Figure 6 for Figure 4 A schematic diagram of the cold plate from a second perspective;

[0033] Figure 7 for Figure 6 A partially enlarged structural schematic diagram of the cold plate shown;

[0034] Figure 8 for Figure 3 A schematic diagram of a partial explosion of the liquid cooling system shown.

[0035] Figure 9 for Figure 8 A schematic diagram of the connecting pipes of the liquid cooling system shown.

[0036] Figure 10 for Figure 8 The diagram shows the structure of the second sealing ring in the liquid cooling system.

[0037] Figure 11 This is a partial exploded structural diagram of a liquid cooling system according to another embodiment of this application;

[0038] Figure 12 for Figure 11 A partial structural diagram of the cold plate in the liquid cooling system shown.

[0039] Figure 13 for Figure 12 The diagram shows a cross-sectional view of the cold plate.

[0040] Among them, 1. Blade cell module; 11. Blade cell; 12. Liquid cooling system; 13. Cold plate; 131. Extension; 132. Cooling channel; 1321. Channel inlet; 1322. Channel outlet; 133. Liquid inlet; 134. Liquid outlet; 135. First plate; 136. Second plate; 137. Support structure; 14. Connecting pipe; 141. Liquid inlet channel; 142. Liquid outlet channel; 143. First mounting groove; 144. Second mounting groove; 15. First sealing ring; 16. Second sealing ring; 2. Housing; 21. Tray; 22. Top cover; 221. Protrusion. Detailed Implementation

[0041] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0043] The following is a reference to the appendix. Figures 1 to 13 The blade cell module, battery pack, and vehicle provided in the embodiments of this application are described in detail.

[0044] Reference Figure 1 As shown, Figure 1 This is an exploded view of a battery pack according to an embodiment of this application. The battery pack includes a blade cell module 1 and a housing 2, with the blade cell module 1 housed within the housing 2. The housing 2 provides a space for accommodating the blade cell module 1. Specifically, the housing 2 may include a tray 21 and a top cover 22, with the top cover 22 covering the tray 21. The top cover 22 and the tray 21 together define the space for accommodating the blade cell module 1.

[0045] The number of blade battery module 1 can be one, two, or more. Each blade battery module 1 can include multiple blade batteries 11, which can be stacked sequentially. For example, refer to... Figure 1 As shown, there are two blade cell modules 1, and the two blade cell modules 1 are arranged side by side (e.g., Figure 1 As shown in the Y direction), each blade cell module 1 includes multiple blade cells 11, and the multiple blade cells 11 are stacked along the first direction (as shown in the Y direction). Figure 1 (as shown in the X direction).

[0046] Reference Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a blade battery module 1 according to an embodiment of this application. Some embodiments of this application provide a blade battery module 1 including: a plurality of blade batteries 11 and a liquid cooling system 12. The plurality of blade batteries 11 are stacked along a first direction (e.g., ...). Figure 2 (As shown in the X direction). Specifically, the two surfaces of each blade cell 11 that are opposite each other along the first direction are the large surfaces of the blade cell 11, that is, the area of ​​the two surfaces of each blade cell 11 that are opposite each other along the first direction is greater than the area of ​​the other surfaces of the blade cell 11.

[0047] Reference Figure 2 and Figure 3 As shown, Figure 3 This is a schematic diagram of the liquid cooling system 12 of a blade battery module 1 according to an embodiment of this application. The liquid cooling system 12 includes multiple cold plates 13, which are spaced apart along a first direction (e.g., ...). Figure 3 As shown in the X direction, at least part of the cold plate 13 is sandwiched between two adjacent blade cells 11. That is, a cold plate 13 is sandwiched between the large surfaces of two adjacent blade cells 11 to cool the large surfaces of the blade cells 11, thereby increasing the heat exchange area between the cold plate 13 and the blade cells 11 and improving the heat exchange efficiency.

[0048] It should be noted that the multiple cold plates 13 are not limited to being sandwiched between two adjacent blade cells 11; some cold plates 13 may be located only on one side of the blade cell 11. For example, the number of cold plates 13 may be one more than the number of blade cells 11. In addition to sandwiching cold plates 13 between two adjacent blade cells 11, cold plates 13 are respectively provided on the outer sides of the two blade cells 11 at both ends, so as to achieve cooling of the two opposing large surfaces of all blade cells 11 using multiple cold plates 13, thereby ensuring heat exchange efficiency. Of course, the relationship between the number of cold plates 13 and blade cells 11 is not limited to the above limitation; the number of cold plates 13 and blade cells 11 may be equal, or the number of cold plates 13 may be one less than the number of blade cells 11, and other arrangements may be made.

[0049] Specifically, refer to Figure 2 and Figure 3 As shown, the length direction of the cold plate 13 is parallel to the length direction of the blade cell 11 (e.g., Figure 2 As shown in the Y direction), the cold plate 13 has an extension 131 extending to the area above the blade cell 11 on one side along the length direction (as shown in the Y direction). Figure 2 As shown in the Z direction, or in other words, the cold plate 13 has an extension 131 on one side along its length, and the extension direction of the extension 131 is set at an angle to the length direction of the cold plate 13; a cooling channel 132 is formed inside the cold plate 13, and an inlet 133 and an outlet 134 communicating with the cooling channel 132 are formed on the extension 131. That is to say, the length direction of the cold plate 13 is consistent with the length direction of the blade cell 11, thereby ensuring that the cold plate 13 and the adjacent blade cell 11 have a large heat exchange area. At the same time, the inlet 133 and the outlet 134 of the cold plate 13 are arranged in the upper region of the blade cell 11, thereby avoiding the poles at both ends of the blade cell 11, and realizing the reasonable arrangement of the cold plate 13 in the blade cell module 1.

[0050] Reference Figures 4 to 7 As shown, Figure 4 This is a first-view structural schematic diagram of the cold plate 13 of a liquid cooling system 12 according to an embodiment of this application. Figure 5 for Figure 4The diagram shows a partially enlarged view of the cold plate 13. Figure 6 for Figure 4 The diagram shows a second-view structural diagram of the cold plate 13. Figure 7 for Figure 6 The diagram shows a partially enlarged view of the cold plate 13. The length direction of the cold plate 13 is shown below. Figure 4 As shown in the Y direction, the cold plate 13 has an upwardly extending extension 131 on its upper side along the length direction. The upper side of the cold plate 13, as shown... Figure 4 As shown in the Z direction, a cooling channel 132 is formed inside the cold plate 13, and an inlet 133 and an outlet 134 communicating with the cooling channel 132 are formed on the extension 131.

[0051] It should be understood that the terminals of the blade cell 11 are typically located at both ends of the blade cell 11 along its length (e.g., Figure 1 As shown in the Y direction, in this embodiment of the application, by providing an extension 131 on one side of the cold plate 13 along the length direction, that is, by setting the cold plate 13 as an irregular plate, the liquid inlet 133 and the liquid outlet 134 of the cold plate 13 are both provided on the extension 131, so that the liquid inlet 133 and the liquid outlet 134 of the cold plate 13 are arranged in the area above the blade cell 11, thereby avoiding the poles at both ends of the blade cell 11.

[0052] Furthermore, it should be noted that most existing vehicles typically have a central channel on their chassis, and the battery pack is usually installed below the central channel. In this embodiment, by arranging the liquid inlet 133 and liquid outlet 134 of the cold plate 13 above the blade cell 11, the area of ​​the upper cover 22 of the entire battery pack corresponding to the liquid inlet 133 and liquid outlet 134 of the cold plate 13 protrudes upward, forming a protrusion 221. (Refer to...) Figure 1 As shown, the position of the protrusion 221 can correspond to the position of the central channel on the vehicle chassis, thereby realizing the arrangement of the protrusion 221 in the central channel. This allows for better utilization of the space in the central channel, enabling the installation and reasonable arrangement of the irregularly shaped battery pack on the vehicle.

[0053] The blade battery module 1 provided in this application embodiment uses a cold plate 13 sandwiched between two adjacent blade batteries 11 to cool the large surface of the blade battery 11. This increases the heat exchange area between the cold plate 13 and the blade battery 11, improves heat exchange efficiency, and thus quickly and efficiently reduces the surface temperature of the blade battery 11, meeting the heat dissipation requirements of fast charging of the battery pack. When thermal runaway occurs in the battery pack, it can effectively prevent the spread of heat. Furthermore, the cold plate 13 has an extension 131 extending to the upper region of the blade battery 11 along its length. A cooling channel 132 is formed inside the cold plate 13, and an inlet 133 and an outlet 134 communicating with the cooling channel 132 are formed on the extension 131. This arrangement of the inlet 133 and outlet 134 of the cold plate 13 in the upper region of the blade battery 11 avoids the terminals at both ends of the blade battery 11, achieving a reasonable arrangement of the cold plate 13 in the blade battery module 1.

[0054] In some embodiments, refer to Figures 4 to 7 As shown, both the liquid inlet 133 and the liquid outlet 134 penetrate the cold plate 13 along its thickness direction. It should be noted that the thickness direction of the cold plate 13... Figure 4 The X direction is shown in the diagram, which is also the first direction in the above embodiment. (Refer to...) Figure 3 and Figure 8 As shown, Figure 8 for Figure 3 The diagram shows a partial exploded view of the liquid cooling system 12. The liquid cooling system 12 includes multiple connecting pipes 14, at least some of which are sandwiched between two adjacent cold plates 13. Each connecting pipe 14 has an inlet channel 141 and an outlet channel 142. The inlet channel 141 communicates with the inlet ports 133 of the two adjacent cold plates 13, and the outlet channel 142 communicates with the outlet ports 134 of the two adjacent cold plates 13. This arrangement allows for the connection between two adjacent cold plates 13 using the connecting pipes 14, and enables the parallel connection of multiple cold plates 13 using multiple connecting pipes 14.

[0055] Reference Figure 9 As shown, Figure 9 This is a schematic diagram of the structure of the connecting pipe 14 of the liquid cooling system 12 according to an embodiment of this application. In some embodiments, the connecting pipe 14 is provided with an inlet channel 141 and an outlet channel 142, which are arranged side by side and both the inlet channel 141 and the outlet channel 142 pass through the connecting pipe 14.

[0056] It should be noted that the multiple connecting pipes 14 are not limited to being sandwiched between two adjacent cold plates 13. Some connecting pipes 14 may be located only on one side of a cold plate 13. For example, the number of connecting pipes 14 may be one more than the number of cold plates 13. In addition to sandwiching connecting pipes 14 between two adjacent cold plates 13, connecting pipes 14 may also be provided on the outer sides of the two cold plates 13 at both ends, so as to realize the connection of liquid inlet and liquid outlet using the two connecting pipes 14 at both ends. Of course, in specific implementations, the number of connecting pipes 14 and cold plates 13 may be equal, or the number of connecting pipes 14 may be one less than the number of cold plates 13, etc.

[0057] Reference Figure 3 and Figure 8 As shown, multiple connecting pipes 14 can be arranged sequentially along a first direction. A cold plate 13 is sandwiched between two adjacent connecting pipes 14. The liquid inlet channels 141 of the multiple connecting pipes 14 can be connected through the liquid inlet ports 133 of the cold plates 13 sandwiched between the connecting pipes 14. The liquid outlet channels 142 of the multiple connecting pipes 14 can be connected through the liquid outlet ports 134 of the cold plates 13 sandwiched between the connecting pipes 14. Specifically, after the coolant enters the liquid inlet channel 141, it can flow in parallel through the liquid inlet ports 133 of the multiple cold plates 13 to the cooling channels 132 of the multiple cold plates 13. During the flow of the coolant in the cooling channels 132, it exchanges heat with the blade battery cell 11. After heat exchange, the coolant flows out of the cold plate 13 through the liquid outlet port 134 of the cold plate 13, and then flows out of the blade battery cell module 1 through the liquid outlet channel 142, thereby achieving the purpose of rapidly cooling the blade battery cell 11 in the blade battery cell module 1.

[0058] In some embodiments, refer to Figure 3 and Figure 8 As shown, a first sealing ring 15 and a second sealing ring 16 are provided between adjacent connecting pipes 14 and cold plate 13. The first sealing ring 15 seals the connection between the liquid inlet channel 141 and the liquid inlet 133, and the second sealing ring 16 seals the connection between the liquid outlet channel 142 and the liquid outlet 134. This arrangement allows the first sealing ring 15 to achieve a sealed connection between the liquid inlet channel 141 and the liquid inlet 133, and the second sealing ring 16 to achieve a sealed connection between the liquid outlet channel 142 and the liquid outlet 134, thereby preventing coolant leakage.

[0059] It should be noted that, in specific implementation, the sealing ring can be achieved by using the connecting pipe 14 and the cold plate 13 to press together. Alternatively, the sealing ring located between the connecting pipe 14 and the cold plate 13 can be compressed by using the two connecting pipes 14 on both sides of the cold plate 13 to press together.

[0060] Reference Figure 10 As shown, Figure 10This is a schematic diagram of the structure of the second sealing ring 16 of the liquid cooling system 12 according to an embodiment of this application. The second sealing ring 16 is an O-ring, and its specific shape and size can be reasonably set according to the shape of the liquid inlet channel 141 and the liquid inlet 133. The first sealing ring 15 can also be an O-ring, and its specific shape and size can be reasonably set according to the shape of the liquid inlet channel 141 and the liquid inlet 133. The specific shape and size of the first sealing ring 15 and the second sealing ring 16 can be the same or different.

[0061] It should be understood that, because the cold plate 13 extends along one side of its length to form an extension portion 131, the cold plate 13 is not a conventional regular rectangular shape, but an irregularly shaped plate. Therefore, the cold plate 13 of this embodiment cannot be used with a traditional harmonica tube design. Based on this, the cold plate 13 of this embodiment can be processed by stamping or blowing to form raised ribs on the cold plate 13, thereby forming cooling channels 132. In specific implementations, the overall thickness of the cold plate 13 can be between 0.5mm and 4mm, and the wall thickness of the cold plate 13 can be between 0.2mm and 0.4mm. The density of the ribs formed on the cold plate 13 can be determined according to the flow resistance and the expansion stress of the battery cell.

[0062] In some embodiments, refer to Figures 4 to 7 As shown, the cold plate 13 includes a first plate 135 and a second plate 136 that are interlocked. At least one of the first plate 135 and the second plate 136 has a portion of its area protruding away from the other to form a cooling channel 132 between the first plate 135 and the second plate 136.

[0063] In practice, to increase the coolant flow rate, refer to... Figures 4 to 7 As shown, a portion of the first plate 135 and a portion of the second plate 136 protrude in a direction away from each other, forming opposing, oppositely protruding ribs on the first plate 135 and the second plate 136, thus forming a cooling channel 132 between the two opposing ribs. Specifically, the surface of the cold plate 13 may be convex at the portion corresponding to the cooling channel 132, while the portion without the cooling channel 132 may be flat, thereby creating a concave-convex structure on the surface of the cold plate 13.

[0064] Considering the structural strength of the cold plate 13 and the sealing effect of the sealing ring, the embodiments of this application have made special designs at the liquid inlet 133 and liquid outlet 134 of the cold plate 13 to ensure the sealing effect of the sealing ring while ensuring the structural strength of the cold plate 13.

[0065] In some embodiments, refer to Figures 4 to 7As shown, the cooling channel 132 has a channel inlet 1321 and a channel outlet 1322. The channel inlet 1321 is formed by protruding from the first plate 135 in a direction away from the second plate 136 and is connected to the liquid inlet 133. The channel outlet 1322 is formed by protruding from the second plate 136 in a direction away from the first plate 135 and is connected to the liquid outlet 134. That is, the cooling channel 132 protrudes only from one side of the cold plate 13 at the channel inlet 1321, and protrudes only from the other opposite side of the cold plate 13 at the channel outlet 1322. Alternatively, the channel inlet 1321 and the channel outlet 1322 of the cooling channel 132 are respectively formed on two opposite sides of the cold plate 13.

[0066] Reference Figure 8 As shown, on one side surface of the cold plate 13, a first sealing ring 15 is disposed around the liquid inlet 133 and the flow channel inlet 1321, and a second sealing ring 16 is disposed around the liquid outlet 134. On the opposite side surface of the cold plate 13, the first sealing ring 15 is disposed around the liquid inlet 133, and the second sealing ring 16 is disposed around the liquid outlet 134 and the flow channel outlet 1322. That is to say, the first sealing ring 15 and the second sealing ring 16 are both adapted to the special design of the flow channel inlet 1321 and the flow channel outlet 1322 and are arranged accordingly.

[0067] It should be noted that, in specific implementation, refer to Figure 8 As shown, the flow channel inlet 1321 can be located in the area below the liquid inlet 133 and has an upward opening, and the flow channel outlet 1322 can be located in the area below the liquid outlet 134 and has an upward opening. To enable the first sealing ring 15 to be located around the liquid inlet 133 and the flow channel inlet 1321, a planar area can be provided on the side plate where the flow channel inlet 1321 is located (i.e., on the first plate 135). This planar area can cooperate with the first sealing ring 15, that is, the area that cooperates with the first sealing ring 15 is a plane, so that the first sealing ring 15 can be located around the liquid inlet 133 and the flow channel inlet 1321. Since the flow channel outlet 1322 of the cooling flow channel 132 and the flow channel inlet 1321 are located on two opposite plate surfaces of the cold plate 13, there is no flow channel outlet 1322 on the side plate where the flow channel inlet 1321 is located (i.e., on the first plate 135). Therefore, the second sealing ring 16 only needs to be located around the liquid outlet channel 142 to achieve sealing.

[0068] Similarly, in order to enable the second sealing ring 16 to be located on the periphery of the liquid outlet 134 and the flow channel outlet 1322, a planar area can be provided on the side plate where the flow channel outlet 1322 is located (i.e., on the second plate 136). This planar area can cooperate with the second sealing ring 16, that is, the area that cooperates with the second sealing ring 16 is a plane, so that the second sealing ring 16 can be located on the periphery of the liquid outlet 134 and the flow channel outlet 1322. Since the flow channel outlet 1322 and the flow channel inlet 1321 of the cooling flow channel 132 are located on two opposite plate surfaces of the cold plate 13, there is no flow channel inlet 1321 on the side plate where the flow channel outlet 1322 is located (i.e., on the second plate 136). Therefore, the first sealing ring 15 only needs to be located on the periphery of the liquid inlet channel 141 to achieve sealing.

[0069] To facilitate the installation and fixing of the first sealing ring 15 and the second sealing ring 16, a first mounting groove 143 for installing the first sealing ring 15 and a second mounting groove 144 for installing the second sealing ring 16 can be provided on the connecting pipe 14.

[0070] It should be noted that, in order to ensure the structural strength of the cold plate 13 and the sealing effect of the sealing ring, the embodiments of this application are not limited to designing the liquid inlet 133 and liquid outlet 134 of the cold plate 13 using the above-described scheme. (Refer to...) Figures 11 to 13 As shown, Figure 11 This is a partial exploded structural diagram of the liquid cooling system 12 according to another embodiment of this application; Figure 12 for Figure 11 A partial structural schematic diagram of the cold plate 13 of the liquid cooling system 12 shown; Figure 13 for Figure 12 A cross-sectional view of the cold plate 13 shown.

[0071] In some embodiments, refer to Figures 11 to 13 As shown, the cold plate 13 includes a first plate 135 and a second plate 136 that are interlocked. At least one of the first plate 135 and the second plate 136 has a portion of its area protruding away from the other to form a cooling channel 132 between the first plate 135 and the second plate 136.

[0072] In practice, to increase the coolant flow rate, refer to... Figures 11 to 13As shown, a portion of the first plate 135 and a portion of the second plate 136 protrude in a direction away from each other, forming opposing, oppositely protruding ribs on the first plate 135 and the second plate 136, thus forming a cooling channel 132 between the two opposing ribs. Specifically, the surface of the cold plate 13 may be convex at the portion corresponding to the cooling channel 132, while the portion without the cooling channel 132 may be flat, thereby creating a concave-convex structure on the surface of the cold plate 13.

[0073] Considering the structural strength of the cold plate 13 and the sealing effect of the sealing ring, the embodiments of this application have made special designs at the liquid inlet 133 and liquid outlet 134 of the cold plate 13 to ensure the sealing effect of the sealing ring while ensuring the structural strength of the cold plate 13.

[0074] In some embodiments, refer to Figures 11 to 13 As shown, a support structure 137 is provided between the first plate 135 and the second plate 136. The liquid inlet 133 and the liquid outlet 134 both pass through the first plate 135, the support structure 137 and the second plate 136. The cooling channel 132 has a channel inlet 1321 and a channel outlet 1322. The channel inlet 1321 is connected to the liquid inlet 133 and the channel outlet 1322 is connected to the liquid outlet 134. The first sealing ring 15 is located around the liquid inlet 133 and the second sealing ring 16 is located around the liquid outlet 134.

[0075] This configuration allows the support structure 137 to support the first plate 135 and the second plate 136, thereby forming an inlet 133 and an outlet 134 on the cold plate 13 that penetrate the first plate 135, the support structure 137, and the second plate 136. Furthermore, the support structure 137 can support the inlet 1321 and the outlet 1322 of the flow channel, enabling the inlet 1321 to connect with the inlet 133 and the outlet 1322 to connect with the outlet 134. Thus, the support structure 137 ensures that the two opposing surfaces of the cold plate 13 at the inlet 133 and the outlet 134 can withstand pressure, thereby ensuring that the first sealing ring 15 and the second sealing ring 16 can be compressed to achieve a seal.

[0076] It should be noted that the support structure 137 needs to be designed to avoid the connection between the flow channel inlet 1321 and the liquid inlet 133, and also needs to be designed to avoid the connection between the flow channel outlet 1322 and the liquid outlet 134, so as to ensure that the flow channel inlet 1321 is connected to the liquid inlet 133 and the flow channel outlet 1322 is connected to the liquid outlet 134. The specific shape and structure of the support structure 137 can be reasonably set according to actual needs, and this application embodiment does not make specific limitations.

[0077] To facilitate the installation and fixing of the first sealing ring 15 and the second sealing ring 16, a first mounting groove 143 for installing the first sealing ring 15 and a second mounting groove 144 for installing the second sealing ring 16 can be provided on the connecting pipe 14.

[0078] To achieve proper installation and positioning of the connecting pipe 14 and the cold plate 13, and to ensure that the sealing ring located between them is jointly compressed by the connecting pipe 14 and the cold plate 13, in some embodiments, one of the adjacent connecting pipe 14 and the cold plate 13 is provided with a plug-in portion, and the other is provided with a plug-in hole. The plug-in portion and the plug-in hole are engaged for positioning. This arrangement ensures the accuracy of the installation position of the connecting pipe 14 and the cold plate 13 through the engagement of the plug-in portion and the plug-in hole, thereby ensuring the reliability of the sealed connection between the two.

[0079] In addition, after the blade cell module 1 is assembled, it is housed in the tray 21 of the battery pack. The two opposite side walls (e.g., the front side wall and the rear side wall) of the tray 21 can also be used to apply a pressing force to the two opposite ends of the blade cell module 1, thereby ensuring the reliability of the sealing connection of the connecting pipe 14, the first sealing ring 15, the second sealing ring 16 and the cold plate 13.

[0080] In some embodiments, refer to Figures 4 to 7 As shown, and Figure 12 As shown, the interior of the cold plate 13 is provided with multiple cooling channels 132. Each cooling channel 132 has a channel inlet 1321 and a channel outlet 1322. The channel inlets 1321 of the multiple cooling channels 132 are all connected to the liquid inlet 133, and the channel outlets 1322 of the multiple cooling channels 132 are all connected to the liquid outlet 134. By providing multiple cooling channels 132 on the cold plate 13, each cold plate 13 can form multiple parallel cooling channels 132, thereby improving the heat exchange efficiency.

[0081] It should be noted that the number of cooling channels 132 is not limited and can be reasonably set according to actual conditions. For example, refer to... Figures 4 to 7 As shown, and Figure 12 As shown, the cold plate 13 is provided with three cooling channels 132. Each of the three cooling channels 132 may have a channel section parallel to the length direction of the cold plate 13. The channel inlet 1321 and channel outlet 1322 of the three cooling channels 132 may be provided on the extension 131 of the cold plate 13, and each has an upward opening.

[0082] Reference Figure 1 As shown, some other embodiments of this application provide a battery pack including the blade cell module 1 as described in any of the above embodiments, and thus have the beneficial effects of the blade cell module 1 as described in any of the above embodiments, which will not be repeated here.

[0083] In some embodiments, refer to Figure 1 As shown, there are two blade cell modules 1, and the two blade cell modules 1 are arranged along the second direction (e.g., Figure 1 The blade cells are arranged side by side (as shown in the Y direction), and each blade cell module 1 includes multiple blade cells 11, which are arranged along a first direction (as shown in the Y direction). Figure 1 (as shown in the X direction) stacked, where the second direction is perpendicular to the first direction.

[0084] In this configuration, the liquid inlets 133 and outlets 134 of the multiple cold plates 13 of each blade cell module 1 are located in the upper region above one end of the blade cell module 1 closest to another blade cell module 1. In other words, the liquid inlets 133 and outlets 134 of all the cold plates 13 of both blade cell modules 1 are located in the middle region of the entire battery pack. This arrangement ensures that the liquid inlets 133 and outlets 134 of all the cold plates 13 of both blade cell modules 1 correspond to the central channel of the vehicle chassis. That is, it achieves the efficient utilization of the central channel space and the rational arrangement of the liquid inlets 133 and outlets 134 of all the cold plates 13 of the battery pack within the central channel.

[0085] In some embodiments, refer to Figure 1 As shown, the battery pack includes a blade cell module 1 and a housing 2, with the blade cell module 1 housed within the housing 2. The housing 2 includes a tray 21 and a top cover 22. The top cover 22 covers the tray 21 and together with the tray 21, forms a space for accommodating the blade cell module 1. The liquid inlets 133 and outlets 134 of all the cold plates 13 of the blade cell module 1 are located in the middle area of ​​the overall battery pack. The areas on the top cover 22 corresponding to the liquid inlets 133 and outlets 134 of all the cold plates 13 protrude upwards, forming protrusions 221. The position of these protrusions 221 can correspond to the position of the central channel on the vehicle chassis. Therefore, after the battery pack is installed on the vehicle chassis, the protrusions 221 are positioned within the central channel, thus better utilizing the space of the central channel and achieving a more efficient installation and arrangement of this irregularly shaped battery pack on the vehicle.

[0086] It should be noted that the number of blade battery cell modules 1 is not limited to two, and can be reasonably set according to the actual situation. The positions of the liquid inlet 133 and liquid outlet 134 of the cold plate 13 of the blade battery cell module 1 can also be reasonably adjusted according to the actual situation.

[0087] Further embodiments of this application provide a vehicle including a battery pack as described in any of the above embodiments, thus possessing the beneficial effects of the battery packs described in any of the above embodiments, which will not be repeated here.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A blade battery module, characterized in that, include: Multiple blade cells (11) are stacked along a first direction; The liquid cooling system (12) includes a plurality of cold plates (13), which are spaced apart along the first direction. At least a portion of the cold plates (13) are sandwiched between two adjacent blade cells (11). The length direction of the cold plates (13) is parallel to the length direction of the blade cells (11). One side of the cold plate (13) along the length direction has an extension (131) extending to the upper region of the blade cells (11). A cooling channel (132) is formed inside the cold plate (13). An inlet (133) and an outlet (134) communicating with the cooling channel (132) are formed on the extension (131).

2. The blade battery module according to claim 1, characterized in that, Both the liquid inlet (133) and the liquid outlet (134) penetrate the cold plate (13) along the first direction; The liquid cooling system (12) includes a plurality of connecting pipes (14), at least a portion of which are sandwiched between two adjacent cold plates (13). Each connecting pipe (14) has an inlet channel (141) and an outlet channel (142). The inlet channel (141) is connected to the inlet port (133) of the two adjacent cold plates (13), and the outlet channel (142) is connected to the outlet port (134) of the two adjacent cold plates (13).

3. The blade battery module according to claim 2, characterized in that, A first sealing ring (15) and a second sealing ring (16) are provided between adjacent connecting pipes (14) and cold plate (13). The first sealing ring (15) seals the connection between the liquid inlet channel (141) and the liquid inlet (133), and the second sealing ring (16) seals the connection between the liquid outlet channel (142) and the liquid outlet (134).

4. The blade cell module according to claim 3, characterized in that, The cold plate (13) includes a first plate (135) and a second plate (136) that are interlocked, and a portion of at least one of the first plate (135) and the second plate (136) protrudes in a direction away from the other to form the cooling channel (132) between the first plate (135) and the second plate (136). The cooling channel (132) has a channel inlet (1321) and a channel outlet (1322). The channel inlet (1321) is formed by the first plate (135) protruding in a direction away from the second plate (136). The channel inlet (1321) is connected to the liquid inlet (133). The channel outlet (1322) is formed by the second plate (136) protruding in a direction away from the first plate (135). The channel outlet (1322) is connected to the liquid outlet (134). On one side surface of the cold plate (13), the first sealing ring (15) is disposed around the liquid inlet (133) and the flow channel inlet (1321), and the second sealing ring (16) is disposed around the liquid outlet (134); on the other side surface of the cold plate (13), the first sealing ring (15) is disposed around the liquid inlet (133), and the second sealing ring (16) is disposed around the liquid outlet (134) and the flow channel outlet (1322).

5. The blade cell module according to claim 3, characterized in that, The cold plate (13) includes a first plate (135) and a second plate (136) that are interlocked, and a portion of at least one of the first plate (135) and the second plate (136) protrudes in a direction away from the other to form the cooling channel (132) between the first plate (135) and the second plate (136). A support structure (137) is provided between the first plate (135) and the second plate (136), and the liquid inlet (133) and the liquid outlet (134) both penetrate the first plate (135), the support structure (137) and the second plate (136); The cooling channel (132) has a channel inlet (1321) and a channel outlet (1322). The channel inlet (1321) is connected to the liquid inlet (133) through the support structure (137), and the channel outlet (1322) is connected to the liquid outlet (134) through the support structure (137). The first sealing ring (15) is located on the periphery of the liquid inlet (133), and the second sealing ring (16) is located on the periphery of the liquid outlet (134).

6. The blade cell module according to claim 2, characterized in that, One of the adjacent connecting pipe (14) and the cold plate (13) is provided with a plug-in part, and the other is provided with a plug-in hole. The plug-in part and the plug-in hole are plugged in and positioned.

7. The blade cell module according to claim 1, characterized in that, The interior of the cold plate (13) is provided with a plurality of cooling channels (132), each of the plurality of cooling channels (132) having a channel inlet (1321) and a channel outlet (1322). The channel inlets (1321) of the plurality of cooling channels (132) are all connected to the liquid inlet (133), and the channel outlets (1322) of the plurality of cooling channels (132) are all connected to the liquid outlet (134).

8. A battery pack, characterized in that, Including the blade cell module (1) as described in any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that, The number of blade battery modules (1) is two, and the two blade battery modules (1) are arranged side by side along the second direction, which is perpendicular to the first direction; The liquid inlet (133) and liquid outlet (134) of the plurality of cold plates (13) of each blade cell module (1) are located in the area above one end of the blade cell module (1) near the other blade cell module (1).

10. A vehicle, characterized in that, Includes the battery pack as described in claim 8 or 9.

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