A plug, a liquid cooling plate, and a battery box

Abstract

The present invention relates to a plug, a liquid cooling plate, and a battery box. An L-shaped channel is provided in the plug. The L-shaped channel includes a horizontal channel and a vertical channel. The horizontal channel extends forward from the corner of the L-shaped channel to pass through the front end face of the plug, and an interface is provided on the front end face of the plug. The vertical channel extends downward from the corner. An opening structure is provided on the lower surface of the plug, and the opening structure has a downward lower opening. The lower end of the vertical channel is integrally connected with the opening structure to form an open hole. One side of the opening structure is connected with the liquid distribution cavity. The vertical channel is connected with the liquid distribution cavity through the opening structure. The plug includes a cover plate for sealing the lower opening of the opening structure. By providing the L-shaped channel, the coolant can enter or flow out of the liquid cooling plate in the front-to-back direction. The vertical channel at the position where the coolant changes the flow direction is directly provided in the plug, which has better strength and no welding connection, thus avoiding the problem of welding penetration and the problem that the welding connection is easily damaged.

Description

Technical Field

[0001] The present invention belongs to the field of battery boxes, and in particular relates to a plug, a liquid cooling plate, and a battery box. Background Art

[0002] As national policies continue to increase the energy density requirements of battery systems, the energy density of lithium iron phosphate batteries used in most commercial vehicles also needs to be continuously improved. In the absence of major technological breakthroughs, the current common practice is to enlarge the battery cells. However, due to the increase in the size of the battery cells, the unit heat dissipation area is reduced, and the heat in the center of the battery cell cannot be quickly transferred out, resulting in poor heat dissipation performance of the battery cell, affecting the performance of the product. Therefore, it is necessary to equip the large-cell lithium iron phosphate battery with a liquid cooling plate to cool the battery.

[0003] The liquid cooling plate usually includes a flow channel plate, in which a flow channel for circulating the coolant is provided. The flow channel extends in a direction parallel to the plate surface of the flow channel plate, passes through the end surfaces of both ends of the flow channel plate and forms an opening on the end surface. In order to ensure the sealing of the flow channel and facilitate the coolant to enter or flow out of the liquid cooling plate, it is necessary to provide a plug at both ends of the flow channel plate to seal the flow channel opening, and provide a liquid distribution cavity communicating with the flow channel in the flow channel plate and an interface for supplying coolant to enter or flow out of the liquid cooling plate on the plug. The interface is usually opened directly on the upper plate surface of the plug. In order to facilitate the water inlet and outlet or change the water inlet and outlet direction, it is usually necessary to weld a water pipe joint on the interface.

[0004] For example, a Chinese utility model patent with an authorization announcement date of 2017.02.15 and an authorization announcement number of "CN205961664U" discloses "an extruded water-cooled plate", including a water-cooled body and a water distribution plate. The water-cooled plate is equivalent to a liquid cooling plate, and the water-cooled body is equivalent to a flow channel plate. The water distribution plate directly constitutes a plug for sealing one end of the flow channel plate. The plug extends in the left-right direction and is consistent with the width direction of the flow channel plate. Water distribution chambers, also known as liquid distribution chambers, are provided at both ends of the plug. The liquid distribution chambers are arranged toward the combined flow channel openings at both ends of the flow channel plate. Two water inlet and outlet holes, also known as interfaces, are provided on the upper surface of the plug above the liquid distribution chamber. A channel extending in a direction perpendicular to the plate surface of the liquid cooling plate is provided between the interface and the water distribution chamber for connecting the two. The aperture of the channel is consistent with the aperture of the interface. Inlet and outlet water joints, also known as water pipe joints, are fixed on the two interfaces by argon arc welding, and the water pipe joints extend in the up and down directions.

[0005] The above-mentioned plug has the following problems: (1) The water pipe joint is directly welded to the upper plate surface of the plug and is connected to the liquid distribution chamber, which has a high risk of welding through the liquid distribution chamber; (2) The welding point between the water pipe joint and the liquid distribution plate is exactly at the position where the coolant flows from horizontal to vertical, that is, the welding point is exactly at the position where the coolant changes its flow direction. The turbulence intensity of the coolant at this position is relatively large, and the impact force on the welding point is relatively large, which increases the risk of damage to the welding point between the water pipe joint and the liquid distribution plate; 3) When the liquid cooling plate is set in the battery box, when the battery box is in and out of water in the front and back directions, it is necessary to connect an adapter to convert the flow direction of the coolant to the water pipe joint, which increases the risk of leakage of the adapter. Moreover, if the coolant leaks, it may damage the batteries in the battery box equipped with the liquid cooling plate. Summary of the Invention

[0006] The present invention aims to provide a plug to address the existing technical issues of high risk of weld penetration of the liquid distribution cavity when welding the water pipe joint to the plug, high risk of leakage at the adapter, and high risk of leakage at the location where the coolant changes flow direction. The present invention also aims to provide a liquid cooling plate using the aforementioned plug to reduce the risk of liquid cooling plate leakage due to damage to the plug. The present invention also aims to provide a battery case using the aforementioned liquid cooling plate to reduce the risk of battery damage due to leakage from the liquid cooling plate.

[0007] In order to solve the above technical problems, the technical solution of the plug of the present invention is:

[0008] The end cap is connected to the bottom surface of the L-shaped cap, and the end cap is connected to the bottom surface of the L-shaped cap by the liquid dispensing cavity to form an L-shaped channel.

[0009] Beneficial effect: By setting an L-shaped channel in the plug, the coolant can enter or flow out of the liquid cooling plate through the interface in the front-to-back direction. When the battery box is in and out of water in the front-to-back direction, there is no need to add an adapter to convert the flow direction of the coolant, thereby avoiding the leakage problem of the adapter; the coolant changes the flow direction near the opening structure and then flows upward along the vertical channel. The vertical channel is directly set in the plug, with better strength, and is not formed by welding the vertical water pipe joint to the upper plate surface of the plug. The problem of easy welding through of the liquid distribution chamber when the water pipe joint is welded to the upper part of the liquid distribution chamber and the technical problem of easy damage to the welding point of the water pipe joint and the plug are avoided, thereby extending the service life of the plug.

[0010] Furthermore, the opening structure is a through hole extending from the lower surface of the plug upward to the vertical channel, and a hole wall on one radial side of the through hole is provided with a connecting hole connected to the liquid distribution chamber.

[0011] Furthermore, the open hole is a process hole left after the vertical channel is processed from bottom to top by a processing tool.

[0012] Beneficial effect: It is convenient to process the vertical channel. The vertical channel can be directly processed through the open hole, and then the lower opening of the opening structure is sealed with a cover plate to ensure the sealing of the coolant when it flows in the plug.

[0013] Furthermore, the opening structure is a liquid distribution groove extending from front to rear and opened on the lower surface of the plug, the liquid distribution groove having a rear notch connected to the liquid distribution cavity and two side groove walls distributed on the left and right, the liquid distribution groove having a necking section in front of the rear notch, and the spacing between the two side groove walls of the necking section in the left and right directions decreases from back to front; the necking section of the liquid distribution groove gradually extends forward from the rear notch, and the liquid distribution groove also includes an equal-width section connected in front of the necking section, and the spacing between the two side groove walls of the equal-width section in the left and right directions remains unchanged from back to front.

[0014] Beneficial effects: The liquid distribution tank connects the vertical channel and the liquid distribution cavity. The necking section of the liquid distribution tank can buffer the coolant, reduce the impact of the coolant on the liquid distribution cavity and the vertical channel, and the impact of the coolant on the tank wall of the liquid distribution tank, and extend the service life of the plug; and the necking section is used to buffer the coolant, and the equal-width section is used to stabilize the flow rate of the coolant, so that the coolant buffered by the necking section stabilizes and then flows into the channel, or the coolant flowing out of the channel stabilizes after being stabilized by the equal-width section and then flows into the liquid distribution cavity, further reducing the impact of the coolant on the inside of the plug.

[0015] Furthermore, the plug includes a liquid distribution plate and a transfer platform protruding from the upper surface of the liquid distribution plate, the rear end of the liquid distribution plate is used to seal one end of the flow channel plate, the liquid distribution plate extends in the left and right directions and is consistent with the width direction of the flow channel plate, the liquid distribution cavity is provided at the rear end of the liquid distribution plate, the opening structure is provided on the lower surface of the liquid distribution plate, the L-shaped channel is provided in the transfer platform, and the interface is provided on the front end surface of the transfer platform.

[0016] Beneficial effect: By setting the L-shaped channel in the transfer platform, the vertical channel and the horizontal channel will not increase the thickness of the water distribution plate. Since the liquid distribution chamber and the liquid distribution tank are set in the liquid distribution plate, the thickness of the liquid distribution plate can meet the thickness of the liquid distribution chamber and the liquid distribution tank, avoiding the need to design the thickness of the entire plug to be thicker in order to set up the L-shaped channel, and can reduce the manufacturing materials required for the plug.

[0017] Furthermore, the adapter includes an overhang portion arranged at the front for passing through the mounting hole on the side panel of the battery box, and the outer periphery of the overhang portion is provided with a positioning step with the step surface facing forward for engaging with the inner surface of the side panel of the box, and the interface is opened on the front end surface of the overhang portion.

[0018] Beneficial effects: It is convenient to position and install the adapter and the side panel of the battery box, and because the overhanging part is installed in the mounting hole on the side panel of the box, the interface on the front end surface of the overhanging part is outside the installation space of the battery module in the box, avoiding the problem that when the interface is located inside the box, it is easy to leak when entering and exiting water, which may affect the battery module.

[0019] Furthermore, the rear end of the liquid distribution plate is provided with a plug for being plugged and connected with the socket provided at the front end of the liquid cooling plate, and the plug is provided with a tongue for being inserted into the mounting groove of the socket.

[0020] Beneficial effect: The plug-in connection is beneficial to ensuring the sealing of the connection between the liquid distribution plate and the flow channel plate.

[0021] Furthermore, a battery module mounting beam for mounting the battery module is protruded on the upper plate surface of the liquid distribution plate at intervals on the rear side of the transfer platform, and a plurality of battery module mounting holes are provided on the upper end surface of the battery module mounting beam.

[0022] Beneficial effect: The battery module mounting beam is integrally arranged on the liquid distribution plate, which avoids the problem of the battery module mounting beam being easily welded through the liquid distribution cavity when being welded to the liquid distribution plate.

[0023] The technical solution of the liquid cooling plate of the present invention is:

[0024] The liquid cooling plate includes a flow channel plate and a plug. The rear end of the plug is used to seal one end of the flow channel plate. The plug extends in the left-right direction and is consistent with the width direction of the flow channel plate. The rear end of the plug is provided with a liquid distribution cavity for communicating with the flow channel in the flow channel plate. The plug is also provided with an interface for supplying coolant to enter or flow out of the liquid cooling plate through the liquid distribution cavity. The plug is also provided with an L-shaped channel. The L-shaped channel includes a transverse channel and a vertical channel. The transverse channel extends forward from the corner of the L-shaped channel and passes through the front end surface of the plug. The interface is provided on the front end surface of the plug. The vertical channel extends downward from the corner of the L-shaped channel. An opening structure is provided on the lower surface of the plug. The opening structure has a downwardly facing lower opening. The lower end of the vertical channel is integrally connected to the opening structure to form an open hole. One side of the opening structure is connected to the liquid distribution cavity. The vertical channel is connected to the liquid distribution cavity through the opening structure. The plug also includes a cover plate for sealing the lower opening of the opening structure, thereby reducing water leakage in the liquid cooling plate using the plug.

[0025] Beneficial effect: By setting an L-shaped channel in the plug, the coolant can enter or flow out of the liquid cooling plate through the interface in the front-to-back direction. When the battery box is in and out of water in the front-to-back direction, there is no need to add an adapter to convert the flow direction of the coolant, thereby avoiding the leakage problem of the adapter; the coolant changes the flow direction near the opening structure and then flows upward along the vertical channel. The vertical channel is directly set in the plug, with better strength, and is not formed by welding the vertical water pipe joint to the upper plate surface of the plug. The problem of easy welding through of the liquid distribution chamber when the water pipe joint is welded to the upper part of the liquid distribution chamber and the technical problem of easy damage to the welding point of the water pipe joint and the plug are avoided, thereby extending the service life of the plug.

[0026] Furthermore, the opening structure is a through hole extending from the lower surface of the plug upward to the vertical channel, and a hole wall on one radial side of the through hole is provided with a connecting hole connected to the liquid distribution chamber.

[0027] Furthermore, the open hole is a process hole left after the vertical channel is processed from bottom to top by a processing tool.

[0028] Beneficial effect: It is convenient to process the vertical channel. The vertical channel can be directly processed through the open hole, and then the lower opening of the opening structure is sealed with a cover plate to ensure the sealing of the coolant when it flows in the plug.

[0029] Furthermore, the opening structure is a liquid distribution groove extending from front to rear and opened on the lower surface of the plug, the liquid distribution groove having a rear notch connected to the liquid distribution cavity and two side groove walls distributed on the left and right, the liquid distribution groove having a necking section in front of the rear notch, and the spacing between the two side groove walls of the necking section in the left and right directions decreases from back to front; the necking section of the liquid distribution groove gradually extends forward from the rear notch, and the liquid distribution groove also includes an equal-width section connected in front of the necking section, and the spacing between the two side groove walls of the equal-width section in the left and right directions remains unchanged from back to front.

[0030] Beneficial effects: The liquid distribution tank connects the vertical channel and the liquid distribution cavity. The necking section of the liquid distribution tank can buffer the coolant, reduce the impact of the coolant on the liquid distribution cavity and the vertical channel, and the impact of the coolant on the tank wall of the liquid distribution tank, and extend the service life of the plug; and the necking section is used to buffer the coolant, and the equal-width section is used to stabilize the flow rate of the coolant, so that the coolant buffered by the necking section stabilizes and then flows into the channel, or the coolant flowing out of the channel stabilizes after being stabilized by the equal-width section and then flows into the liquid distribution cavity, further reducing the impact of the coolant on the inside of the plug.

[0031] Furthermore, the plug includes a liquid distribution plate and a transfer platform protruding from the upper surface of the liquid distribution plate, the rear end of the liquid distribution plate is used to seal one end of the flow channel plate, the liquid distribution plate extends in the left and right directions and is consistent with the width direction of the flow channel plate, the liquid distribution cavity is provided at the rear end of the liquid distribution plate, the opening structure is provided on the lower surface of the liquid distribution plate, the L-shaped channel is provided in the transfer platform, and the interface is provided on the front end surface of the transfer platform.

[0032] Beneficial effect: By setting the L-shaped channel in the transfer platform, the vertical channel and the horizontal channel will not increase the thickness of the water distribution plate. Since the liquid distribution chamber and the liquid distribution tank are set in the liquid distribution plate, the thickness of the liquid distribution plate can meet the thickness of the liquid distribution chamber and the liquid distribution tank, avoiding the need to design the thickness of the entire plug to be thicker in order to set up the L-shaped channel, and can reduce the manufacturing materials required for the plug.

[0033] Furthermore, the adapter includes an overhang portion arranged at the front for passing through the mounting hole on the side panel of the battery box, and the outer periphery of the overhang portion is provided with a positioning step with the step surface facing forward for engaging with the inner surface of the side panel of the box, and the interface is opened on the front end surface of the overhang portion.

[0034] Beneficial effects: It is convenient to position and install the adapter and the side panel of the battery box, and because the overhanging part is installed in the mounting hole on the side panel of the box, the interface on the front end surface of the overhanging part is outside the installation space of the battery module in the box, avoiding the problem that when the interface is located inside the box, it is easy to leak when entering and exiting water, which may affect the battery module.

[0035] Furthermore, the rear end of the liquid distribution plate is provided with a plug for being plugged and connected with the socket provided at the front end of the liquid cooling plate, and the plug is provided with a tongue for being inserted into the mounting groove of the socket.

[0036] Beneficial effect: The plug-in connection is beneficial to ensuring the sealing of the connection between the liquid distribution plate and the flow channel plate.

[0037] Furthermore, a battery module mounting beam for mounting the battery module is protruded on the upper plate surface of the liquid distribution plate at intervals on the rear side of the transfer platform, and a plurality of battery module mounting holes are provided on the upper end surface of the battery module mounting beam.

[0038] Beneficial effect: The battery module mounting beam is integrally arranged on the liquid distribution plate, which avoids the problem of the battery module mounting beam being easily welded through the liquid distribution cavity when being welded to the liquid distribution plate.

[0039] The technical solution of the battery box of the present invention is:

[0040] The battery box includes a liquid cooling plate, which includes a flow channel plate and a plug. The rear end of the plug is used to seal one end of the flow channel plate. The plug extends in the left-right direction and is consistent with the width direction of the flow channel plate. The rear end of the plug is provided with a liquid distribution cavity for communicating with the flow channel in the flow channel plate. The plug is also provided with an interface for communicating with the liquid distribution cavity for cooling liquid to enter or flow out of the liquid cooling plate. An L-shaped channel is also provided in the plug. The L-shaped channel includes a transverse channel and a vertical channel. The transverse channel extends forward from the corner of the L-shaped channel and passes through the front end surface of the plug. The interface is provided on the front end surface of the plug. The vertical channel extends downward from the corner of the L-shaped channel; an opening structure is provided on the lower surface of the plug, and the opening structure has a lower opening facing downward; the lower end of the vertical channel is integrally connected to the opening structure to form an open hole, one side of the opening structure is connected to the liquid distribution cavity, and the vertical channel is connected to the liquid distribution cavity through the opening structure. The plug also includes a cover plate for sealing the lower opening of the opening structure.

[0041] Beneficial effect: By arranging an L-shaped channel in the plug, the coolant can enter or flow out of the liquid cooling plate through the interface in the front-to-back direction. When the battery box is in and out of water in the front-to-back direction, there is no need to add an adapter to convert the flow direction of the coolant, thereby avoiding the problem of leakage of the adapter; the coolant converts the flow direction near the opening structure and then flows upward along the vertical channel. The vertical channel is directly arranged in the plug, and has better strength. It is not formed by welding the vertical water pipe joint to the upper plate surface of the plug, thereby avoiding the problem of easy welding through of the liquid distribution cavity when the water pipe joint is welded to the upper part of the liquid distribution cavity and the technical problem that the welding point of the water pipe joint and the plug is easily damaged, thereby extending the service life of the plug. In this way, it can minimize the leakage of the liquid cooling plate due to damage to the plug, thereby improving the safety of the battery box.

[0042] Furthermore, the opening structure is a through hole extending from the lower surface of the plug upward to the vertical channel, and a hole wall on one radial side of the through hole is provided with a connecting hole connected to the liquid distribution chamber.

[0043] Furthermore, the open hole is a process hole left after the vertical channel is processed from bottom to top by a processing tool.

[0044] Beneficial effect: It is convenient to process the vertical channel. The vertical channel can be directly processed through the open hole, and then the lower opening of the opening structure is sealed with a cover plate to ensure the sealing of the coolant when it flows in the plug.

[0045] Furthermore, the opening structure is a liquid distribution groove extending from front to rear and opened on the lower surface of the plug, the liquid distribution groove having a rear notch connected to the liquid distribution cavity and two side groove walls distributed on the left and right, the liquid distribution groove having a necking section in front of the rear notch, and the spacing between the two side groove walls of the necking section in the left and right directions decreases from back to front; the necking section of the liquid distribution groove gradually extends forward from the rear notch, and the liquid distribution groove also includes an equal-width section connected in front of the necking section, and the spacing between the two side groove walls of the equal-width section in the left and right directions remains unchanged from back to front.

[0046] Beneficial effects: The liquid distribution tank connects the vertical channel and the liquid distribution cavity. The necking section of the liquid distribution tank can buffer the coolant, reduce the impact of the coolant on the liquid distribution cavity and the vertical channel, and the impact of the coolant on the tank wall of the liquid distribution tank, and extend the service life of the plug; and the necking section is used to buffer the coolant, and the equal-width section is used to stabilize the flow rate of the coolant, so that the coolant buffered by the necking section stabilizes and then flows into the channel, or the coolant flowing out of the channel stabilizes after being stabilized by the equal-width section and then flows into the liquid distribution cavity, further reducing the impact of the coolant on the inside of the plug.

[0047] Furthermore, the plug includes a liquid distribution plate and a transfer platform protruding from the upper surface of the liquid distribution plate, the rear end of the liquid distribution plate is used to seal one end of the flow channel plate, the liquid distribution plate extends in the left and right directions and is consistent with the width direction of the flow channel plate, the liquid distribution cavity is provided at the rear end of the liquid distribution plate, the opening structure is provided on the lower surface of the liquid distribution plate, the L-shaped channel is provided in the transfer platform, and the interface is provided on the front end surface of the transfer platform.

[0048] Beneficial effect: By setting the L-shaped channel in the transfer platform, the vertical channel and the horizontal channel will not increase the thickness of the water distribution plate. Since the liquid distribution chamber and the liquid distribution tank are set in the liquid distribution plate, the thickness of the liquid distribution plate can meet the thickness of the liquid distribution chamber and the liquid distribution tank, avoiding the need to design the thickness of the entire plug to be thicker in order to set up the L-shaped channel, and can reduce the manufacturing materials required for the plug.

[0049] Furthermore, the adapter includes an overhang portion arranged at the front for passing through the mounting hole on the side panel of the battery box, and the outer periphery of the overhang portion is provided with a positioning step with the step surface facing forward for engaging with the inner surface of the side panel of the box, and the interface is opened on the front end surface of the overhang portion.

[0050] Beneficial effects: It is convenient to position and install the adapter and the side panel of the battery box, and because the overhanging part is installed in the mounting hole on the side panel of the box, the interface on the front end surface of the overhanging part is outside the installation space of the battery module in the box, avoiding the problem that when the interface is located inside the box, it is easy to leak when entering and exiting water, which may affect the battery module.

[0051] Furthermore, the rear end of the liquid distribution plate is provided with a plug for being plugged and connected with the socket provided at the front end of the liquid cooling plate, and the plug is provided with a tongue for being inserted into the mounting groove of the socket.

[0052] Beneficial effect: The plug-in connection is beneficial to ensuring the sealing of the connection between the liquid distribution plate and the flow channel plate.

[0053] Furthermore, a battery module mounting beam for mounting the battery module is protruded on the upper plate surface of the liquid distribution plate at intervals on the rear side of the transfer platform, and a plurality of battery module mounting holes are provided on the upper end surface of the battery module mounting beam.

[0054] Beneficial effect: The battery module mounting beam is integrally arranged on the liquid distribution plate, which avoids the problem of the battery module mounting beam being easily welded through the liquid distribution cavity when being welded to the liquid distribution plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 is a perspective schematic diagram of a liquid cooling plate installed in a battery box according to a first embodiment of the present invention from a first viewing angle;

[0056] Figure 2 is a perspective schematic diagram of a liquid cooling plate installed in a battery box according to a first specific embodiment of the present invention from a second viewing angle;

[0057] Figure 3 yes Figure 1 A first-person perspective perspective diagram of the plug;

[0058] Figure 4 yes Figure 3 A second perspective perspective diagram of the plug in FIG.

[0059] Figure 5 yes Figure 1 Schematic diagram of the structure of the flow channel plate;

[0060] Figure 6 yes Figure 5 AA cross-sectional view of the liquid cooling plate in FIG;

[0061] Figure 7 yes Figure 1 Schematic diagram of the structure of the plug;

[0062] Figure 8 yes Figure 7 CC cross-sectional view of the plug in;

[0063] Figure 9 yes Figure 7 BB cross-sectional view of the plug in the figure.

[0064] In the figure: 1. flow channel plate; 2. plug; 3. liquid distribution plate; 4. adapter; 5. L-shaped channel; 6. horizontal channel; 7. vertical channel; 8. interface; 9. liquid distribution chamber; 10. liquid distribution tank; 11. water pipe joint; 12. same-direction flow channel group; 13. flow channel; 14. rear notch; 15. necking section; 16. equal-width section; 17. box side panel; 18. plug; 19. socket; 20. tongue; 21. mounting groove; 22. battery module mounting beam; 23. battery module mounting hole; 24. overhang; 25. cover plate. DETAILED DESCRIPTION

[0065] The present invention will be further described in detail below with reference to the accompanying drawings.

[0066] The first embodiment of the liquid cooling plate of the present invention is as follows: Figure 1 、 Figure 2 As shown, the liquid cooling plate includes a flow channel plate 1 and a plug 2. Figure 6 As shown, the flow channel plate 1 is a rectangular plate body, and a plurality of rows of unidirectional flow channel groups 12 are provided in the flow channel plate 1. Each row of unidirectional flow channel groups 12 includes a plurality of flow channels 13 that are adjacent to each other and have the same coolant flow direction. Figure 6 The arrow on the channel plate 1 in the figure indicates the flow direction of the coolant. Figure 5 As shown, a socket 19 is provided at the front end of the flow channel plate 1 , and the socket 19 includes a U-shaped mounting groove 21 with the notch facing forward.

[0067] like Figure 3 As shown, the plug 2 includes a liquid distribution plate 3 and an adapter 4 integrally provided on the upper plate surface of the liquid distribution plate 3. The two adapters 4 are arranged at intervals along the left and right directions. The rear end of the liquid distribution plate 3 is used to seal the front end of the flow channel plate 1. The liquid distribution plate 3 extends along the left and right directions and is consistent with the width direction of the flow channel plate 1. Figure 3 、 4 As shown, the rear end of the liquid distribution plate 3 is provided with a liquid distribution cavity 9 for communicating with the flow channel 13 in the flow channel plate 1. There are two liquid distribution cavities 9, one for water inlet and one for water outlet, and the two liquid distribution cavities 9 are respectively located at the left and right ends of the liquid distribution plate 3.

[0068] like Figure 8As shown, an L-shaped channel 5 is provided in the transfer platform 4, and the L-shaped channel includes a transverse channel 6 and a vertical channel 7. The transverse channel 6 extends forward from the corner of the L-shaped channel 5 to pass through the front end face of the transfer platform 4, and an interface 8 is opened on the front end face of the transfer platform 4. The interface 8 is used for allowing coolant to enter or flow out of the liquid cooling plate, and the vertical channel 7 extends downward from the corner of the L-shaped channel 5; in this embodiment, the interface 8 is connected to a water pipe joint 11 installed on the side panel 17 of the battery box body in the same extension direction as the transverse channel 6. There are two water pipe joints 11, one for coolant to enter the liquid cooling plate, and the other for coolant to flow out of the liquid cooling plate. An opening structure is provided on the lower surface of the plug 2. In this embodiment, the opening structure is a liquid distribution groove 10 extending from front to rear and provided on the lower surface of the liquid distribution plate 3. The liquid distribution groove 10 has a downward lower opening, a rear notch 14 connected to the liquid distribution chamber 9, and two side groove walls distributed on the left and right. The lower end of the vertical channel 7 is integrally connected to the liquid distribution groove 10 to form an open hole. The open hole is a process hole left after the processing tool processes the vertical channel from bottom to top. After the processing is completed, the cover plate 25 is used to seal the lower opening of the liquid distribution groove 10.

[0069] like Figure 4 、 9 As shown, the liquid distribution tank 10 has a necking section 15 in front of the rear notch 14, and the spacing between the groove walls on both sides of the necking section 15 in the left-right direction decreases from the back to the front. The liquid distribution tank 10 also includes an equal-width section 16 connected to the front of the necking section 15, and the spacing between the groove walls on both sides of the equal-width section 16 in the left-right direction remains unchanged from the back to the front. In this embodiment, the spacing between the groove walls on both sides of the rear notch 14 is adapted to the width dimension of the liquid distribution cavity 9 in the left-right direction, and the width dimension of the liquid distribution cavity 9 in the left-right direction is adapted to the width of a column of unidirectional flow channel groups 12 on the flow channel plate 1, so as to facilitate the coolant to enter or flow out of the unidirectional flow channel group 12.

[0070] The transfer station 4 includes an overhang portion 24 provided at the front for passing through the mounting hole on the side plate 17 of the battery box. The outer periphery of the overhang portion 24 is provided with a positioning step facing forward for engaging with the inner surface of the side plate 17 of the box. Figure 3 As shown, the rear end of the liquid distribution plate 3 is provided with a plug 18, and the plug is provided with a tongue 20. When in use, the tongue 20 is inserted into the mounting groove 21 of the socket 19. Figure 3 、 7 As shown in FIG8 , a battery module mounting beam 22 for mounting a battery module is provided on the upper plate surface of the liquid distribution plate 3 at the rear of the transfer platform 4 , and a plurality of battery module mounting holes 23 are provided on the upper end surface of the battery module mounting beam 22 .

[0071] The present invention provides an L-shaped channel 5 in the plug 2 so that the coolant can enter or flow out of the liquid cooling plate through the interface 8 in the front-to-back direction. When the battery box is in and out of water in the front-to-back direction, there is no need to provide an additional adapter to convert the flow direction of the coolant, thereby avoiding the problem of leakage of the adapter; the coolant converts the flow direction near the opening structure and then flows upward along the vertical channel 7. The vertical channel 7 is directly provided in the plug 2 and has better strength. It is not formed by welding the vertical water pipe joint to the upper plate surface of the plug, thereby avoiding the problem that the liquid distribution chamber 9 is easily welded through when the water pipe joint is welded to the upper part of the liquid distribution chamber 9 and the technical problem that the welding point between the water pipe joint and the plug 2 is easily damaged, thereby extending the service life of the plug 2.

[0072] The second specific embodiment of the liquid cooling plate of the present invention differs from the first specific embodiment in that no adapter is protruding from the plug, and the plug is directly composed of a liquid distribution plate, which is provided with a liquid distribution cavity, a liquid distribution trough and an L-shaped channel. In this embodiment, since the L-shaped channel is provided in the liquid distribution plate, the plate thickness of the liquid distribution plate is relatively thick.

[0073] The third specific embodiment of the liquid cooling plate of the present invention differs from the first specific embodiment in that the opening structure is a through-hole extending from the lower surface of the plug upward to the vertical channel, the hole wall on the radial side of the through-hole is provided with a connecting hole connected to the liquid distribution chamber, and the cover plate is used to seal the lower opening of the through-hole.

[0074] The fourth specific embodiment of the liquid cooling plate of the present invention is different from the first specific embodiment in that plugs are provided at both ends of the flow channel plate, and adapters for water inlet and outlet are respectively provided on the two plugs.

[0075] The structure of the plug in the first specific embodiment of the present invention is the same as that of the plug in the first specific embodiment of the liquid cooling plate, and will not be described in detail here.

[0076] The structure of the plug in the second specific embodiment of the present invention is the same as that of the plug in the second specific embodiment of the liquid cooling plate, and will not be described in detail here.

[0077] The specific embodiment 3 of the plug of the present invention has the same structure as the plug in the above-mentioned embodiment 3 of the liquid cooling plate, and will not be described in detail here.

[0078] The structure of the plug in the fourth specific embodiment of the present invention is the same as that of the plug in the fourth specific embodiment of the liquid cooling plate, and will not be described in detail here.

[0079] In a specific embodiment of the battery box of the present invention, a liquid cooling plate is provided inside the battery box, such as Figure 1 、 Figure 2As shown in the figure, as well as the introduction to the installation structure of the interface 8, the water pipe joint 11 and the box side plate 17 in the above-mentioned liquid cooling plate embodiment, the liquid cooling plate directly constitutes the bottom plate of the battery box. The method of arranging the liquid cooling plate in the battery box belongs to the prior art. Of course, it can be installed in the battery box and is not limited to constituting the bottom plate of the battery box. The structure of the liquid cooling plate in each specific embodiment of the battery box of the present invention is the same as the structure of the liquid cooling plate in the above-mentioned liquid cooling plate embodiments, and will not be repeated here.

Claims

1. A plug, the rear end of which is used to seal one end of the flow channel plate. The plug extends in the left-right direction and is consistent with the width direction of the flow channel plate. A liquid distribution cavity communicating with the flow channel in the flow channel plate is provided at the rear end of the plug. The plug is also provided with an interface communicating with the liquid distribution cavity for coolant to enter or flow out of the liquid cooling plate. The flow channel plate is a rectangular plate body and is provided with a plurality of rows of unidirectional flow channel groups, characterized in that: An L-shaped channel is also provided in the plug, and the L-shaped channel includes a transverse channel and a vertical channel. The transverse channel extends forward from the corner of the L-shaped channel to pass through the front end surface of the plug, and the interface is provided on the front end surface of the plug. The vertical channel extends downward from the corner of the L-shaped channel; an opening structure is provided on the lower surface of the plug, and the opening structure has a downward opening; the lower end of the vertical channel is integrally connected with the opening structure to form an open hole, one side of the opening structure is connected with the liquid distribution chamber, and the vertical channel is connected with the liquid distribution chamber through the opening structure. The plug also It includes a cover plate for sealing the lower opening of the opening structure, the opening structure is a liquid distribution groove extending from front to rear and opened on the lower surface of the plug, the liquid distribution groove has a rear notch connected to the liquid distribution cavity and two side groove walls distributed on the left and right, the liquid distribution groove has a necking section in front of the rear notch, and the spacing between the two side groove walls of the necking section in the left and right directions decreases from back to front; the necking section of the liquid distribution groove gradually extends forward from the rear notch, and the liquid distribution groove also includes an equal-width section connected to the front of the necking section, and the spacing between the two side groove walls of the equal-width section in the left and right directions remains unchanged from back to front.

2. The plug according to claim 1, characterized in that: The opening structure is a through hole extending upward from the lower surface of the plug to the vertical channel, and a hole wall on one radial side of the through hole is provided with a connecting hole connected to the liquid distribution cavity.

3. The plug according to claim 1 or 2, characterized in that: The open hole is a process hole left after the vertical channel is processed from bottom to top by a processing tool.

4. The plug according to claim 1, characterized in that: The plug includes a liquid distribution plate and a transfer platform protruding from the upper surface of the liquid distribution plate, the rear end of the liquid distribution plate is used to seal one end of the flow channel plate, the liquid distribution plate extends in the left and right directions and is consistent with the width direction of the flow channel plate, the liquid distribution cavity is arranged at the rear end of the liquid distribution plate, the opening structure is opened on the lower surface of the liquid distribution plate, the L-shaped channel is arranged in the transfer platform, and the interface is opened on the front end surface of the transfer platform.

5. The plug according to claim 4, characterized in that: The adapter includes an overhang portion arranged at the front for passing through a mounting hole on a side panel of the battery box, the outer periphery of the overhang portion is provided with a positioning step with the step surface facing forward for engaging with the inner surface of the side panel of the box, and the interface is opened on the front end surface of the overhang portion.

6. The plug according to claim 4 or 5, characterized in that: A plug is provided at the rear end of the liquid distribution plate for being plugged and connected with a socket provided at the front end of the liquid cooling plate, and an inserting tongue is provided on the plug for being inserted into the mounting groove of the socket.

7. The plug according to claim 4 or 5, characterized in that: A battery module mounting beam for mounting a battery module is protruded on the upper plate surface of the liquid distribution plate at intervals on the rear side of the transfer platform, and a plurality of battery module mounting holes are arranged on the upper end surface of the battery module mounting beam.

8. A liquid cooling plate, comprising a flow channel plate and a plug, characterized in that: The plug is the plug described in any one of claims 1 to 7.

9. A battery box, including a liquid cooling plate, the liquid cooling plate including a flow channel plate and a plug, characterized in that: The plug is the plug described in any one of claims 1 to 7.

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