On-board charger and new energy vehicle technical field

Abstract

Embodiments of the present application disclose an on-board charger and a new energy vehicle. The on-board charger includes a housing and a cooling flow channel that is of a rotary structure and that is disposed at a middle position in the housing in a height direction of the housing. The cooling flow channel is disposed at the position close to the middle in the height direction of the housing, so that the housing is divided into two areas with a first accommodation space and a second accommodation space respectively by the middle cooling flow channel. The cooling flow channel includes a first flow channel disposed close to the first accommodation space and a third flow channel disposed close to the second accommodation space, so that there are flow channels in both the first accommodation space and the second accommodation space in the housing to provide a heat dissipation function for electronic components, thereby sufficiently dissipating heat from all key electronic components and increasing a power density of the entire on-board charger. Further, the cooling flow channel is designed into a double-layer three-dimensional backflow form, which basically covers an internal space of the housing, can take away more heat, and has higher heat exchange efficiency.

Description

[0001] 10.12.2025

[0002] 1

[0003] ON-BOARD CHARGERAND NEW ENERGY VEHICLE TECHNICAL FIELD

[0004] The present application relates to the technical field of on-board devices of new energy vehicles, and in particular, to an on-board charger and a new energy vehicle.

[0005] BACKGROUND

[0006] Currently, the market share of new energy vehicles is increasing daily, and developing the new energy vehicle industry has become one of the important strategies for countries around the world. An on-board charger provides charging and discharging functions for vehicles and is an indispensable part.

[0007] Currently, for new energy vehicles, battery life and charging speed are two indicators that consumers are very concerned about. Weight reduction of vehicle parts can improve the battery life. For on-board chargers, because there are many internal electronic components with irregular shapes, to accommodate these electronic components and ensure an electrical safety distance, the volume of a housing is usually large, thereby increasing the weight of the entire machine. In addition, the power level of the on-board charger determines the charging speed. Higher power indicates a higher charging speed, but higher power leads to a larger amount of heat generated by electronic components. This requires the housing to have excellent heat dissipation performance, and a higher heat dissipation requirement indicates a higher design requirement for a cooling system of the on-board charger.10.12.2025

[0008] 2

[0009] SUMMARY

[0010] The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the present application provides an on-board charger and a new energy vehicle, to improve space utilization of a housing of the on-board charger and enable sufficient heat dissipation from all key electronic components, thereby effectively controlling a volume and weight of the housing, and increasing a power density of the entire on-board charger.

[0011] In a first aspect, the present application provides an on-board charger, including: a housing, where a first accommodation space and a second accommodation space that are sequentially provided in a height direction of the housing are formed in the housing; and a cooling flow channel that is of a rotary structure and is disposed at a middle position in the housing in the height direction of the housing, where the cooling flow channel includes at least a first flow channel, a second flow channel, and a third flow channel that sequentially communicate, the first flow channel and the third flow channel extend in a length direction of the housing, the second flow channel extends in the height direction of the housing, the first flow channel is disposed close to the first accommodation space, and the third flow channel is disposed close to the second accommodation space.

[0012] According to the embodiment of the present application, the cooling flow channel is disposed at the position close to the middle in the height direction of the housing, so that the housing is divided into two areas with the first accommodation space and the second accommodation space respectively by the middle water channel. The cooling flow channel includes the first flow channel disposed close to the first accommodation space and the third flow channel disposed close to the second accommodation space, so that there are flow channels in both the first accommodation space and the second accommodation space in the housing to provide a heat dissipation function for electronic components, thereby sufficiently10.12.2025

[0013] 3

[0014] dissipating heat from all key electronic components and increasing the power density of the entire on-board charger. Further, the cooling flow channel is designed into a double-layer three-dimensional backflow form, which basically covers an internal space of the housing, can take away more heat, and has higher heat exchange efficiency.

[0015] In an embodiment of the on-board charger, the cooling flow channel further includes: a fourth flow channel disposed between the first flow channel and the second flow channel to cause the first flow channel to communicate with the second flow channel, where the fourth flow channel extends in a width direction of the housing and is disposed close to the first accommodation space.

[0016] According to the embodiment of the present application, the fourth flow channel is disposed between the first flow channel and the second flow channel, so that on the one hand, the communication between the first flow channel and the second flow channel is implemented, and on the other hand, a flow path of the cooling flow channel can be increased without increasing the size of the housing, thereby further improving a heat dissipation effect.

[0017] In an embodiment of the on-board charger, the number of the first flow channels, the number of the second flow channels, and the number of the third flow channels are the same and are each at least two, and each of the second flow channels communicates with one of the first flow channels and one of the third flow channels.

[0018] According to the embodiment of the present application, a path of the cooling flow channel can be increased without increasing the size of the housing, thereby further improving the heat dissipation effect.10.12.2025

[0019] 4

[0020] In an embodiment of the on-board charger, at least two first flow channels are disposed in the housing at intervals in the width direction of the housing, at least two second flow channels are disposed in the housing at intervals in the width direction of the housing, and at least two third flow channels are adjacently disposed in the housing in the width direction of the housing.

[0021] According to the embodiment of the present application, a flow area of the cooling flow channel can be increased without increasing the size of the housing, thereby further improving the heat dissipation effect.

[0022] In an embodiment of the on-board charger, the number of the fourth flow channels is the same as that of the first flow channels and that of the second flow channels and is at least two, and each of the fourth flow channels communicates with one of the first flow channels and one of the second flow channels.

[0023] According to the embodiment of the present application, a flow path and a flow area of the cooling flow channel can be increased without increasing the size of the housing, thereby further improving the heat dissipation effect.

[0024] In an embodiment of the on-board charger, the at least two fourth flow channels are disposed in the housing at intervals in the width direction of the housing.

[0025] In an embodiment of the on-board charger, the on-board charger further includes a liquid inlet and a liquid outlet that are provided in the housing, and both the liquid inlet and the liquid outlet communicate with the cooling flow channel.

[0026] According to the embodiment of the present application, the liquid inlet and the liquid outlet that communicate with the cooling flow channel are provided in the housing, so that an external coolant can enter or flow out of the cooling flow channel.10.12.2025

[0027] 5

[0028] In an embodiment of the on-board charger, the liquid inlet and the liquid outlet are provided in a same end face of the housing.

[0029] According to the embodiment of the present application, the liquid inlet and the liquid outlet are provided in the same end face of the housing, so that the coolant can enter or flow out of the cooling flow channel that is of the rotary structure inside the housing.

[0030] In an embodiment of the on-board charger, the housing includes a main body and a cover plate, a recess is formed in the main body, and the cover plate closes the recess to form the cooling flow channel.

[0031] According to the embodiment of the present application, the housing includes the main body and the cover plate, and the cooling flow channel is formed by closing the recess in the main body through the cover plate, so that the processing difficulty is reduced.

[0032] In an embodiment of the on-board charger, a plurality of mounting grooves disposed around the cooling flow channel are formed in the main body, and the mounting grooves are configured to accommodate electronic components.

[0033] According to the embodiment of the present application, the mounting grooves for disposing electronic components are disposed around the cooling flow channel, so that electronic components needing heat dissipation can be disposed around the cooling flow channel, and heat dissipation from the electronic components around the cooling flow channel can be performed simultaneously. A heat dissipation surface of the cooling flow channel is fully utilized, the length of the cooling flow channel is effectively shortened, and the volume and weight of the housing are reduced.10.12.2025

[0034] 6

[0035] In an embodiment of the on-board charger, the main body and / or the cover plate is made of a die-casting aluminum material.

[0036] In an embodiment of the on-board charger, the main body and the cover plate are connected together by a friction welding process.

[0037] In a second aspect, the present application provides a new energy vehicle, including the on-board charger according to any one of the embodiments of the first aspect.

[0038] The one or more embodiments of the present application have at least one or more beneficial effects as follows:

[0039] According to the embodiments of the present application, the cooling flow channel is disposed at the position close to the middle in the height direction of the housing, so that the housing is divided into two areas with the first accommodation space and the second accommodation space respectively by the middle water channel. The cooling flow channel includes the first flow channel disposed close to the first accommodation space and the third flow channel disposed close to the second accommodation space, so that there are flow channels in both the first accommodation space and the second accommodation space in the housing to provide a heat dissipation function for electronic components, thereby sufficiently dissipating heat from all key electronic components and increasing the power density of the entire on-board charger.

[0040] Further, the cooling flow channel is designed into a double-layer three-dimensional backflow form, which basically covers an internal space of the housing, can take away more heat, and has higher heat exchange efficiency.10.12.2025

[0041] 7

[0042] Some of the additional aspects and advantages of the present application are set forth in the following description, and some become clear from the following description, or are learned by practice of the present application.

[0043] BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The disclosure of the present application becomes more readily understood with reference to the accompanying drawings. Those skilled in the art readily understand that these accompanying drawings are merely for illustrative purposes and are not intended to limit the protection scope of the present application. In addition, similar components are represented by similar numbers in the figures, in which:

[0045] FIG. 1 is a schematic structural diagram of an on-board charger according to an embodiment of the present application from a view direction;

[0046] FIG. 2 is an exploded view of an on-board charger according to an embodiment of the present application from another view direction;

[0047] FIG. 3 is a cross-sectional view of an on-board charger according to an embodiment of the present application from a view direction;

[0048] FIG. 4 is a cross-sectional view of an on-board charger according to an embodiment of the present application from another view direction;

[0049] FIG. 5 is a schematic three-dimensional structural diagram of an on-board charger according to an embodiment of the present application from a view direction; and10.12.2025

[0050] 8

[0051] FIG. 6 is a schematic three-dimensional structural diagram of an on-board charger according to an embodiment of the present application from another view direction.

[0052] Description of reference numerals

[0053] 100. Housing; 110. First accommodation space; 120. Second accommodation space; 130. Main body; 131. First recess; 132. Second recess; 133. Third recess; 134. First stepped surface; 135. Second stepped surface; 136. Third stepped surface; 137. Fourth stepped surface; 138. Fifth stepped surface; 140. Cover plate; 141. First cover plate; 142. Second cover plate; 143. Third cover plate; 150. Mounting groove; 151. First mounting groove; 152. Second mounting groove; 153. Third mounting groove; 200. Cooling flow channel; 210. First flow channel; 211. First horizontal flow channel; 212. Second horizontal flow channel; 220. Second flow channel; 221. First vertical flow channel; 222. Second vertical flow channel; 230. Third flow channel; 231. Third horizontal flow channel; 232. Fourth horizontal flow channel; 240. Fourth flow channel; 241. Fifth horizontal flow channel; 242. Sixth horizontal flow channel; 300. Liquid inlet; 400. Liquid outlet.

[0054] DETAILED DESCRIPTION OF EMBODIMENTS

[0055] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0056] As mentioned in the background, because a current on-board charger has many internal electronic components with irregular shapes, to accommodate these electronic components and ensure an electrical safety distance, the volume of a10.12.2025

[0057] 9

[0058] housing is usually large, thereby increasing the weight of the entire machine. In addition, the power level of the on-board charger determines the charging speed. Higher power indicates a higher charging speed, but higher power leads to a larger amount of heat generated by electronic components. This requires the housing to have excellent heat dissipation performance, and a higher heat dissipation requirement indicates a higher design requirement for a cooling system of the on-board charger.

[0059] Based on this, an embodiment of the present application creatively proposes a novel on-board charger. A cooling flow channel 200 is disposed at a position close to the middle in a height direction of a housing 100, so that the housing 100 is divided into two areas with a first accommodation space 110 and a second accommodation space 120 respectively by the middle water channel. The cooling flow channel 200 includes a first flow channel 210 disposed close to the first accommodation space 110 and a third flow channel 230 disposed close to the second accommodation space 120, so that there are flow channels in both the first accommodation space 110 and the second accommodation space 120 in the housing 100 to provide a heat dissipation function for electronic components, thereby sufficiently dissipating heat from all key electronic components and increasing a power density of the entire on-board charger. Further, the cooling flow channel 200 is designed into a double-layer three-dimensional backflow form, which basically covers an internal space of the housing 100, can take away more heat, and has higher heat exchange efficiency.

[0060] The present application is specifically described below with reference to specific embodiments.

[0061] Referring to FIG. 1 to FIG. 6, an on-board charger generally includes a housing 100, a cooling flow channel 200, a liquid inlet 300, and a liquid outlet 400. The cooling flow channel 200 is disposed at a middle position in a housing 100 in a10.12.2025

[0062] 10

[0063] height direction of the housing, and divides the interior of the housing 100 into a first accommodation space 110 and a second accommodation space 120. The liquid inlet 300 and the liquid outlet 400 are provided in the housing 100 and both communicate with the cooling flow channel 200, so that a coolant can enter the cooling flow channel 200 through the liquid inlet 300 or flow out of the cooling flow channel 200 through the liquid outlet 400.

[0064] Further referring to FIG. 1 to FIG. 4, in some specific embodiments, the liquid inlet 300 and the liquid outlet 400 are provided in the same end face of the housing 100, so that the coolant can enter or flow out of the cooling flow channel 200 that is of a rotary structure inside the housing 100.

[0065] Further referring to FIG. 1 to FIG. 4, the cooling flow channel 200 is of the rotary structure. In a preferred implementation, in the embodiment of the present application, the cooling flow channel 200 includes a first flow channel 210, a second flow channel 220, a third flow channel 230, and a fourth flow channel 240, and the first flow channel 210, the fourth flow channel 240, the second flow channel 220, and the third flow channel 230 sequentially communicate to form the rotary structure. The first flow channel 210 and the fourth flow channel 240 are disposed close to the first accommodation space 110, and the third flow channel 230 is disposed close to the second accommodation space 120. The first flow channel 210 and the third flow channel 230 extend in a length direction of the housing 100, the second flow channel 220 extends in the height direction of the housing 100, and the fourth flow channel 240 extends in a width direction of the housing 100. The second flow channel 220 causes the first flow channel 210 disposed close to the first accommodation space 110 to communicate with the third flow channel 230 disposed close to the second accommodation space 120, and the fourth flow channel 240 causes the first flow channel 210 to communicate with the second flow channel 220.10.12.2025

[0066] 11

[0067] It should be noted that in the embodiment of the present application, the width direction of the housing 100 is a direction X in FIG. 1 , the length direction of the housing 100 is a direction Y in FIG. 1 , and the height direction of the housing 100 is a direction Z in FIG. 1.

[0068] Further referring to FIG. 1 to FIG. 4, in some specific embodiments, the first flow channel 210 and the third flow channel 230 are disposed parallel to each other in the housing 100, the first flow channel 210, the second flow channel 220, and the fourth flow channel 240 are arranged perpendicular to each other in pairs, and the third flow channel 230, the second flow channel 220, and the fourth flow channel 240 are arranged perpendicular to each other in pairs.

[0069] In some other specific embodiments, the first flow channel 210 and the third flow channel 230 are disposed parallel to each other in the housing 100, the first flow channel 210 is disposed at a first preset angle with the second flow channel 220, the first flow channel 210 is disposed at a second preset angle with the fourth flow channel 240 and / or the second flow channel 220 is disposed at the second preset angle with the fourth flow channel 240, the third flow channel 230 is disposed at a third preset angle with the second flow channel 220, and the third flow channel 230 is disposed at a fourth preset angle with the fourth flow channel 240 and / or the second flow channel 220 is disposed at the fourth preset angle with the fourth flow channel 240. It should be noted that in the embodiment of the present application, specific values of the first preset angle, the second preset angle, the third preset angle, and the fourth preset angle are not limited, and can be set according to actual product requirements in a specific implementation.

[0070] In some specific embodiments, the number of the first flow channels 210, the number of the second flow channels 220, the number of the third flow channels 230, and the number of the fourth flow channels 240 are each at least two, to increase a flow path of the cooling flow channel 200 as much as possible without10.12.2025

[0071] 12

[0072] increasing the size of the housing 100, thereby further improving the heat dissipation effect of the cooling flow channel 200. Each second flow channel 220 communicates with one of the first flow channels 210 and one of the third flow channels 230, and each fourth flow channel 240 communicates with one of the first flow channels 210 and one of the second flow channels 220. It may be understood that during the implementation of the present application, the number of the first flow channels 210, the number of the second flow channels 220, the number of the third flow channels 230, and the number of the fourth flow channels 240 may be the same or different. Preferably, the number of the first flow channels 210, the number of the second flow channels 220, the number of the third flow channels 230, and the number of the fourth flow channels 240 are the same. It should be noted that in the embodiment of the present application, the number of the first flow channels 210, the number of the second flow channels 220, the number of the third flow channels 230, and the number of the fourth flow channels 240 are not specifically limited, and can be set according to actual product requirements without departing from the inventive concept of the present application.

[0073] In some specific embodiments, at least two first flow channels 210 are disposed in the housing 100 at intervals in the width direction of the housing 100.

[0074] In some other specific embodiments, at least two second flow channels 220 are disposed in the housing 100 at intervals in the width direction of the housing 100. In some other specific embodiments, at least the third flow channels 230 are adjacently disposed in the housing 100 in the width direction of the housing 100. In some other specific embodiments, at least two fourth flow channels 240 are disposed in the housing 100 at intervals in the width direction of the housing 100. It may be understood that through the foregoing arrangement, a flow path and a flow area of the cooling flow channel 200 can be increased without increasing the size of the housing 100, thereby further improving the heat dissipation effect.10.12.2025

[0075] 13

[0076] Further referring to FIG. 1 to FIG. 4, in some specific embodiments, the housing 100 of the on-board charger can be manufactured by a die casting process. It may be understood that due to limitations of the die casting process, the first flow channel 210, the third flow channel 230, and the fourth flow channel 240 of the housing 100 are in an open state when a casting blank is formed. To seal the water channel, the housing 100 in the implementation of the present application includes a main body 130 and a cover plate 140, where a plurality of recesses are formed in the main body 130, and the cover plate 140 closes the recesses to form the cooling flow channel 200.

[0077] The solution of the present application is explained below with an example in which the number of the first flow channels 210, the number of the second flow channels 220, the number of the third flow channels 230, and the number of the fourth flow channels 240 are each two. Further referring to FIG. 1 to FIG. 4, the first flow channel 210 includes a first horizontal flow channel 211 and a second horizontal flow channel 212, the second flow channel 220 includes a first vertical flow channel 221 and a second vertical flow channel 222, the third flow channel 230 includes a third horizontal flow channel 231 and a fourth horizontal flow channel 232, and the fourth flow channel 240 includes a fifth horizontal flow channel 241 and a sixth horizontal flow channel 242. The first vertical flow channel 221 , the second vertical flow channel 222, the fifth horizontal flow channel 241 , and the sixth horizontal flow channel 242 are all disposed at an end of each of the first horizontal flow channel 211, the second horizontal flow channel 212, the third horizontal flow channel 231 , and the fourth horizontal flow channel 232 away from the liquid inlet 300 and the liquid outlet 400.

[0078] Further referring to FIG. 1 to FIG. 4, one end of the first horizontal flow channel 211 communicates with the liquid inlet 300, and one end of the second horizontal flow channel 212 communicates with the liquid outlet 400. One end of the first10.12.2025

[0079] 14

[0080] horizontal flow channel 211 away from the liquid inlet 300 communicates with one end of the fifth horizontal flow channel 241 , and the other end of the fifth horizontal flow channel 241 communicates with one end of the first vertical flow channel 221. The other end of the first vertical flow channel 221 communicates with one end of the third horizontal flow channel 231 , and the other end of the third horizontal flow channel 231 communicates with one end of the fourth horizontal flow channel 232. The other end of the fourth horizontal flow channel 232 communicates with one end of the second vertical flow channel 222, and the other end of the second vertical flow channel 222 communicates with one end of the fourth horizontal flow channel 232. The other end of the fourth horizontal flow channel 232 communicates with one end of the second horizontal flow channel 212 away from the liquid outlet 400.

[0081] When the cooling flow channel 200 is in a working state, the coolant enters the cooling flow channel 200 through the liquid inlet 300, then flows through the first horizontal flow channel 211 and the fifth horizontal flow channel 241 disposed close to the first accommodation space 110 to enter the first vertical flow channel 221, then enters the second accommodation space 120 below the first accommodation space 110 through the first vertical flow channel 221 , flows through the third horizontal flow channel 231 and the fourth horizontal flow channel 232 disposed close to the second accommodation space 120 to enter the second vertical flow channel 222, then returns to the first accommodation space 110 again through the second vertical flow channel 222, flows through the fourth horizontal flow channel 232 and the second horizontal flow channel 212 disposed close to the first accommodation space 110, and then flows out of the cooling flow channel 200 through the liquid outlet 400. Viewed from the length direction of the housing 100, with a 180°detour, the coolant flows through an area that basically covers the horizontal cross section of the housing. Viewed from the height direction of the housing, the coolant flows from the flow channel close to the first accommodation space 110 to the flow channel close to the second accommodation space 12010.12.2025

[0082] 15

[0083] through the first vertical flow channel 221 with a vertical drop, and then flows from the flow channel close to the second accommodation space 120 to the flow channel close to the first accommodation space 110 through the second vertical flow channel 222 with a vertical drop, and the flow area basically covers a vertical cross section of the housing 100. Through this design, it is ensured that a contact area between the entire housing 100 and the coolant is large enough, heat exchange efficiency is improved, and the temperature of the housing 100 and the internal ambient temperature are effectively reduced. Moreover, the cooling flow channel 200 divides the housing 100 into two parts, namely the first accommodation space 110 and the second accommodation space 120. In this double-layer three-dimensional backflow water channel design, electronic components that generate a large amount of heat can be isolated on both sides of the cooling flow channel 200. This avoids the problem of temperature rise caused by mutual interfere between components with a small distance therebetween, and increases a surface area provided by the cooling flow channel 200 for heat dissipation from the electronic components, thereby effectively reducing the volume of the entire on-board charger and the weight of the housing, and increasing the power density.

[0084] Further referring to FIG. 6, the plurality of recessed formed in the main body 130 include, but are not limited to, a first recess 131 , a second recess 132, and a third recess 133 that are located in the second accommodation space 120, where the first recess 131 corresponds to the first horizontal flow channel 211 , the second recess 132 corresponds to the second horizontal flow channel 212, and the third recess 133 corresponds to the third horizontal flow channel 231 and the fourth horizontal flow channel 232. Further referring to FIG. 6, the third recess 133 is of a circuitous structure, which extends from one end close to the second flow channel 220 to one end close to the liquid inlet 300 in the length direction of the housing 100, to form a recess corresponding to the third horizontal flow channel 231 , and then rotates at one end close to the liquid inlet 300, and extends from the end10.12.2025

[0085] 16

[0086] close to the liquid inlet 300 to the end close to the second flow channel 220, to form a recess corresponding to the fourth horizontal flow channel 232.

[0087] Further referring to FIG. 6, the cover plate 140 includes at least a first cover plate 141, a second cover plate 142, and a third cover plate 143. The first cover plate 141 is configured to close the first recess 131 in the second accommodation space 120, the second cover plate 142 is configured to close the second recess 132 in the second accommodation space 120, and the third cover plate 143 is configured to close the third recess 133 in the second accommodation space 120. In some specific embodiments, the first cover plate 141 , the second cover plate 142, and the third cover plate 143 are combined with the main body 130 by a friction stir welding process, thereby achieving the structural characteristics of a three-dimensional circuitous water channel and the sealing of the first horizontal flow channel 211 , the second horizontal flow channel 212, the third horizontal flow channel 231 , and the fourth horizontal flow channel 232.

[0088] In some specific embodiments, after the assembly of the on-board charger is completed, an input inductor in the on-board charger is located at a position in the second accommodation space 120 corresponding to the first horizontal flow channel 211 , and heat dissipation from the input inductor is performed by dispensing an adhesive on a surface of the first cover plate 141. An output inductor in the on-board charger is located at a position in the second accommodation space 120 corresponding to the second horizontal flow channel 212, and heat dissipation from the output inductor is performed by dispensing an adhesive on a surface of the second cover plate 142.

[0089] Further referring to FIG. 1 to FIG. 6, the main body 130 is further provided with a mounting groove 150, and the mounting groove 150 is configured to accommodate an electronic component. To improve the heat dissipation effect of related electronic components in the mounting grooves 150, in the embodiment of the present application, the mounting grooves 150 are disposed around the cooling10.12.2025

[0090] 17

[0091] flow channel 200. In a specific embodiment, the mounting grooves 150 include at least a first mounting groove 151 for assembling an electrolytic capacitor, a second mounting groove 152 for assembling a main transformer and a main inductor, and a third mounting groove 153 for assembling a DCDC transformer and a DCDC inductor. The first mounting groove 151, the second mounting groove 152, and the third mounting groove 153 are all located in the first accommodation space 110, and are all disposed between the first horizontal flow channel 211 and the second horizontal flow channel 212, so that heat dissipation from electronic components accommodated therein can be performed by using the first horizontal flow channel 211 and the second horizontal flow channel 212. The first mounting groove 151, the second mounting groove 152, and the third mounting groove 153 are sequentially disposed in the first accommodation space 110 in the length direction of the housing 100, and the first mounting groove 151 is disposed at one end of the first accommodation space 110 close to the liquid inlet 300 and the liquid outlet 400. The second mounting groove 152 and the third mounting groove 153 are located at positions corresponding to the third horizontal flow channel 231 and the fourth horizontal flow channel 232. In some specific embodiments, bottom plates at the bottom of the second mounting groove 152 and the third mounting groove 153 share the same bottom plate with bottom plates at the bottom of the third horizontal flow channel 231 and the fourth horizontal flow channel 232, so that further heat dissipation from electronic components accommodated in the second mounting groove 152 and the third mounting groove 153 can be performed by using the third horizontal flow channel 231 and the fourth horizontal flow channel 232.

[0092] In some specific embodiments, the first mounting groove 151 , the second mounting groove 152, and the third mounting groove 153 are structurally contoured according to special shapes of the electronic components that need to be accommodated therein, which ensures the mounting reliability of the electronic components and enables sufficient heat dissipation from all components. In10.12.2025

[0093] 18

[0094] addition, side walls of these mounting grooves can be regarded as flow guide ribs and reinforcing ribs inside the housing 100, which not only increases the flow speed of aluminum liquid during die casting, but also enhances the strength of a casting, so that a blank of the housing 100 is not subjected to deformation when friction stir welding is performed on the water channel cover plate.

[0095] Further referring to FIG. 1 to FIG. 6, the main body 130 further includes a first stepped surface 134, a second stepped surface 135, a third stepped surface 136, a fourth stepped surface 137, and a fifth stepped surface 138. The first stepped surface 134 and the second stepped surface 135 are located on a side of the second horizontal flow channel 212 facing the first accommodation space 110, and are sequentially disposed in the length direction of the housing 100. The third stepped surface 136 and the fourth stepped surface 137 are located on a side of the first horizontal flow channel 211 facing the first accommodation space 110, and are sequentially disposed in the length direction of the housing 100. The fifth stepped surface 138 is located on a side of each of the fifth horizontal flow channel 241 and the sixth horizontal flow channel 242 that faces the first accommodation space 110. When the on-board charger is assembled, the first stepped surface 134, the second stepped surface 135, the third stepped surface 136, and the fourth stepped surface 137 are in contact with a main IGBT to dissipate heat from the main IGBT. The fifth stepped surface 138 is in contact with an IGBT of a power supply, to dissipate heat from the IGBT of the power supply.

[0096] To sum up, upper sides of the first horizontal flow channel 211 and the second horizontal flow channel 212 (on a side of the first accommodation space 110) are the first stepped surface 134, the second stepped surface 135, the third stepped surface 136, and the fourth stepped surface 137 for dissipating heat from the main IGBT. Lower sides of the first horizontal flow channel 211 and the second horizontal flow channel 212 (on a side of the second accommodation space 120) are the first cover plate 141 and the second cover plate 142 for dissipating heat10.12.2025

[0097] 19

[0098] from the input inductor and the output inductor, respectively. Through this structural layout manner in which electronic components are distributed on the upper and lower sides of the water channel, a contact area between the water channel and the components is fully utilized. This reduces the volumes of the water channel and the housing and the weight of the housing while meeting heat dissipation requirements for the components.

[0099] Corresponding to the foregoing on-board charger, an embodiment of the present application further provides a new energy vehicle. The new energy vehicle includes the on-board charger described in any one of the foregoing embodiments. For relevant content of the on-board charger, reference may be made to those shown above. Details are not described herein.

[0100] In the description of this specification, descriptions with reference to the terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" mean that specific features, structures, materials, or characteristics described with reference to the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0101] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two or three, unless otherwise explicitly and specifically defined.10.12.2025

[0102] 20

[0103] Although the embodiments of the present application have been shown and described above, it can be understood that, the foregoing embodiments are exemplary and should not be understood as a limitation on the present application. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the foregoing embodiments within the scope of the present application.

Claims

10. 12.202521CLAIMS1. An on-board charger, comprising:a housing (100), wherein a first accommodation space (110) and a second accommodation space (120) that are sequentially provided in a height direction of the housing are formed in the housing; anda cooling flow channel (200) that is of a rotary structure and is disposed at a middle position in the housing (100) in the height direction of the housing, wherein the cooling flow channel (200) comprises at least a first flow channel (210), a second flow channel (220), and a third flow channel (230) that sequentially communicate, the first flow channel (210) and the third flow channel (230) extend in a length direction of the housing (100), the second flow channel (220) extends in the height direction of the housing (100), the first flow channel (210) is disposed close to the first accommodation space (110), and the third flow channel (230) is disposed close to the second accommodation space (120).

2. The on-board charger according to claim 1 , wherein the cooling flow channel (200) further comprises:a fourth flow channel (240) disposed between the first flow channel (210) and the second flow channel (220) to cause the first flow channel (210) to communicate with the second flow channel (220), wherein the fourth flow channel (240) extends in a width direction of the housing (100) and is disposed close to the first accommodation space (110).

3. The on-board charger according to claim 2, wherein at least two first flow channels (210) are disposed in the housing (100) at intervals in the width direction of the housing (100), at least two second flow channels (220) are disposed in the housing (100) at intervals in the width direction of the housing (100), and at least two third flow channels (230) are adjacently disposed in the housing (100) in the width direction of the housing (100).10.12.2025224. The on-board charger according to claim 3, wherein the number of the fourth flow channels (240) is the same as that of the first flow channels (210) and that of the second flow channels (220) and is at least two, and each of the fourth flow channels (240) communicates with one of the first flow channels (210) and one of the second flow channels (220).

5. The on-board charger according to claim 4, wherein the at least two fourth flow channels (240) are disposed in the housing (100) at intervals in the width direction of the housing (100).

6. The on-board charger according to any one of claims 1 to 5, further comprising a liquid inlet (300) and a liquid outlet (400) that are provided in the housing (100), wherein both the liquid inlet (300) and the liquid outlet (400) communicate with the cooling flow channel (200).

7. The on-board charger according to claim 6, wherein the liquid inlet (300) and the liquid outlet (400) are provided in a same end face of the housing (100).

8. The on-board charger according to any one of claims 1 to 5, wherein the housing (100) comprises a main body (130) and a cover plate (140), a recess is formed in the main body (130), and the cover plate (140) closes the recess to form the cooling flow channel (200).

9. The on-board charger according to claim 8, wherein a plurality of mounting grooves (150) disposed around the cooling flow channel (200) are formed in the main body (130), and the mounting grooves (150) are configured to accommodate electronic components.

10. The on-board charger according to claim 8, wherein the main body (130) and / or the cover plate (140) is made of a die-casting aluminum material.10.12.20252311. The on-board charger according to claim 10, wherein the main body (130) and the cover plate (140) are connected together by a friction welding process.

12. A new energy vehicle, comprising the on-board charger according to any one of claims 1 to 11.

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