High-power vehicle-mounted charging device

Abstract

The utility model relates to the technical field of new energy automobiles, and discloses a high-power vehicle-mounted charging device, which comprises a charger body, an upper shell, a lower shell, a plug-in and a U-shaped pipeline, the upper shell is arranged at the upper part of the charger body, the lower shell is arranged at the lower part of the charger body, and the upper shell and the lower shell are clamped and fixed through the plug-in. A water inlet and a water outlet are formed in the side edge of each of the upper shell and the lower shell, the U-shaped pipeline is embedded in the upper shell and the lower shell and is communicated with the water inlet and the water outlet, and the charger body comprises an input port, a control unit, a power unit, a low-voltage power supply and an output port. According to the utility model, the charger body composed of the input port, the control unit, the power unit, the low-voltage power supply and the output port is adopted, and parallel capacity expansion of two high-power vehicle-mounted chargers is supported; through cooperative arrangement of the heat conduction plate and the U-shaped pipeline, heat dissipation is performed on the charger body in a water cooling mode, and meanwhile heat dissipation of the heat conduction plate is promoted through the heat dissipation fins arranged at the outer end of the heat conduction plate.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a high-power vehicle-mounted charging device. Background Art

[0002] At present, the on-board charging devices configured for electric vehicles on the market are generally 6.6kW power products, with low charging power. In the face of insufficient large-capacity power batteries and overseas external charging piles, the required charging time is long, which makes it difficult to meet customers' charging needs. It is necessary to develop high-power on-board charging devices, but the existing high-power on-board charging devices are large in size, occupy a large space and have less than ideal heat dissipation performance. Long-term use can easily cause the temperature of the charging device to rise too quickly, affecting the performance stability and service life of the device. Utility Model Content

[0003] The purpose of the utility model is to provide a high-power vehicle-mounted charging device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-power vehicle-mounted charging device, comprising a charger body, an upper shell, a lower shell, a plug-in and a U-shaped pipe, the upper part of the charger body is the upper shell, and the lower part is the lower shell, the upper shell and the lower shell are fixed by plug-in card connection, and the sides of the upper shell and the lower shell are provided with water inlet and water outlet, the U-shaped pipe is embedded in the upper shell and the lower shell and connects the water inlet and the water outlet, the charger body comprises an input port, a control unit, a power unit, a low-voltage power supply and an output port, and the input port, the control unit, the low-voltage power supply and the output port are all connected to the power unit.

[0005] The following improvement is made in the solution of the present application: the outer side of the U-shaped pipe is wrapped with a heat conducting plate, and the outer end of the heat conducting plate is connected to a plurality of heat sinks.

[0006] The following improvements are made in the present application: a card slot matching with the upper shell is provided at the top end of the lower shell, an L-shaped cavity is provided at the bottom end of the upper shell, the plug-in includes a card strip, a block, a guide rod, a card block and a fixed frame, the card strip is arranged in the card slot, the fixed frame is located at the top edge of the card slot on the lower shell, the block, guide rod and card block are all arranged in the L-shaped cavity and connected in sequence, and a spring is provided on the guide rod.

[0007] The following improvements are made in the present application: the L-shaped cavity is connected to the bottom and side of the upper shell, a limit plate is provided in the L-shaped cavity near the side of the upper shell, a through hole is provided on the limit plate to match the guide rod, one end of the spring is connected to the limit plate, and the other end is connected to the stopper. By providing the limit plate, the stopper, the guide rod and the card block are restricted in the L-shaped cavity to prevent them from falling.

[0008] The following improvement is made in the solution of the present application: a connecting through hole corresponding to the input port and the output port is opened on the side of the upper shell.

[0009] The following improvements are made in the present application: two spare PIN pins are added to the input port, the control unit includes a CP / CC detection circuit, a CAN communication circuit and a charging monitoring circuit, the power unit includes an input rectifier circuit, an inverter circuit and an output rectifier circuit, the CP / CC detection circuit is arranged between the input port and the input rectifier circuit, the CAN communication circuit and the charging monitoring circuit are arranged between the output rectifier circuit and the output port, and the output port includes two PIN ports for the positive and negative poles of the low-voltage auxiliary power supply, two PIN ports for the positive and negative poles of the high-voltage charging circuit, chassis ground, communication lines CANH and CANL, and a charging request signal line. With data as the core, advanced algorithms and technologies are used to realize the intelligence and automation of software, improve user experience and software competitiveness; select automotive-grade control chips, and use a full isolation solution for the high-voltage detection part and the CAN communication part, so that the reliability of the product is further improved; compatible with single-phase (220V) charging piles and three-phase (380V) charging piles, to achieve a wide range of adaptation to charging piles. It allows charging to continue when the grid is out of phase. It also has protection functions such as input over-voltage and under-voltage, output over-voltage and under-voltage, over-temperature protection, over-current protection, output short-circuit protection, and communication fault protection.

[0010] Compared with the prior art, the utility model provides a high-power vehicle-mounted charging device, which has the following beneficial effects:

[0011] 1. The utility model adopts a charger body consisting of an input port, a control unit, a power unit, a low-voltage power supply and an output port, and supports parallel expansion of two high-power on-board chargers.

[0012] 2. The utility model uses water cooling to dissipate heat from the charger body through the coordinated arrangement between the heat conducting plate and the U-shaped pipe. The heat inside the charger body is conducted out by the heat conducting plate, and water is injected into the U-shaped pipe through the water inlet to cool the heat conducting plate. At the same time, the heat dissipation of the heat conducting plate is promoted by the heat sink arranged at the outer end of the heat conducting plate.

[0013] 3. The utility model wraps the charger body in the upper and lower shells, which not only fixes the heat dissipation structure but also plays a certain protective role. The upper and lower shells can be quickly disassembled and assembled through internal plug-ins. The upper shell is inserted into the card slot, and the card bar pushes the block to move sideways. The block drives the guide rod and the card block to move and compress the spring, so that the card block leaves the L-shaped cavity and enters the fixed frame, thereby fixing the upper shell and the lower shell. When disassembling, you only need to push the card block out of the fixed frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the connection between the lower shell and the charger body;

[0016] Figure 3 It is a schematic diagram of the connection between the upper shell and the lower shell;

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle

[0018] Figure 5 It is a cross-sectional view of a U-shaped pipe;

[0019] Figure 6 This is the internal circuit diagram of the charger body.

[0020] In the figure: 1. charger body; 11. input port; 12. output port; 2. upper shell; 21. L-shaped cavity; 3. lower shell; 31. slot; 4. U-shaped pipe; 5. water inlet; 6. water outlet; 7. heat conduction plate; 71. heat sink; 8. card strip; 81. block; 82. guide rod; 83. card block; 84. fixed frame; 85. spring; 86. limit plate. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiment of the present invention will be described below in conjunction with the accompanying drawings in the embodiment of the present invention:

[0022] like Figure 1-6 As shown, a high-power vehicle-mounted charging device includes a charger body 1, an upper shell 2, a lower shell 3, a plug-in and a U-shaped pipe 4. The upper part of the charger body 1 is the upper shell 2, and the lower part is the lower shell 3. The upper shell 2 and the lower shell 3 are fixed by plug-in clamping, and the sides of the upper shell 2 and the lower shell 3 are provided with a water inlet 5 and a water outlet 6. The U-shaped pipe 4 is embedded in the upper shell 2 and the lower shell 3 and connects the water inlet 5 and the water outlet 6, and the outer side of the U-shaped pipe 4 is wrapped with a heat conducting plate 7, and the outer end of the heat conducting plate 7 is connected to a plurality of heat sinks 71.

[0023] The charger body 1 includes an input port 11, a control unit, a power unit, a low-voltage power supply and an output port 12. The input port 11, the control unit, the low-voltage power supply and the output port 12 are all connected to the power unit. The upper shell 2 has a connecting through hole corresponding to the input port 11 and the output port 12. The standard input interface 11 uses a single-phase industrial frequency input voltage of 220V. In order to increase the power, two spare PIN pins (PIN pins NC1 and NC2) are added to the input port 11 to achieve AC 380V input. The control unit includes a CP / CC detection circuit, a CAN communication circuit and a charging monitoring circuit. The sampled output current and voltage are passed to the PID control loop after processing. The controller compares the difference between the measured value and the expected value, and then passes the adjustment requirement to the PWM loop (PWM pulse width modulation technology). The pulse width change is used to control the length of the opening and closing time of the power device in the high-voltage loop, and finally the output current and voltage are as close as possible to the values ​​required by the main control system. The power unit includes The input rectifier circuit, inverter circuit and output rectifier circuit, CP / CC detection circuit are arranged between the input port 11 and the input rectifier circuit, and the CAN communication circuit and the charging monitoring circuit are arranged between the output rectifier circuit and the output port 12, so as to convert the input industrial frequency AC power into DC power suitable for the voltage of the power battery system, and the power module is increased from 6.6kW to 11-22kW, and the output current is increased from DC 16A to DC 23A-52A; the output voltage of the low-voltage power supply is 12V, which is used to supply power to the electrical appliances on the electric vehicle during charging; the output port 12 includes two PIN ports for the positive and negative poles of the low-voltage auxiliary power supply, two PIN ports for the positive and negative poles of the high-voltage charging circuit, chassis ground, communication lines CANH and CANL, and a charging request signal line, two PIN ports for the high-voltage charging circuit, and the charging request signal line is used for completing the charging connection confirmation between the input port of the charger and the external power supply, and then sending a charging request signal to the vehicle controller through the charging request signal line, and at the same time or after a short delay, the low-voltage power supply is used to supply power to the whole vehicle.

[0024] A card slot 31 matching with the upper shell 2 is provided at the top end of the lower shell 3, and an L-shaped cavity 21 is provided at the bottom end of the upper shell 2. The plug-in includes a card strip 8, a block 81, a guide rod 82, a block 83 and a fixed frame 84. The card strip 8 is arranged in the card slot 31, and the fixed frame 84 is located at the top edge of the card slot 31 on the lower shell 3. The block 81, the guide rod 82 and the block 83 are all arranged in the L-shaped cavity 21 and connected in sequence. A spring 85 is sleeved on the guide rod 82. The L-shaped cavity 21 is connected to the bottom end and the side of the upper shell 2. A limit plate 86 is provided in the L-shaped cavity 21 near the side of the upper shell 2, and a through hole matching with the guide rod 82 is provided on the limit plate 86.

[0025] The above embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A high-power vehicle-mounted charging device, characterized in that: The invention comprises a charger body (1), an upper shell (2), a lower shell (3), a plug-in unit and a U-shaped pipe (4); the upper part of the charger body (1) is the upper shell (2), and the lower part is the lower shell (3); the upper shell (2) and the lower shell (3) are fixed by plug-in clamping; the upper shell (2) and the lower shell (3) are both provided with a water inlet (5) and a water outlet (6) on the sides; the U-shaped pipe (4) is embedded in the upper shell (2) and the lower shell (3) and communicates with the water inlet (5) and the water outlet (6); the charger body (1) comprises an input port (11), a control unit, a power unit, a low-voltage power supply and an output port (12); the input port (11), the control unit, the low-voltage power supply and the output port (12) are all connected to the power unit.

2. A high-power vehicle-mounted charging device according to claim 1, characterized in that: The outer side of the U-shaped pipe (4) is wrapped with a heat conducting plate (7), and the outer end of the heat conducting plate (7) is connected to a plurality of heat sinks (71).

3. A high-power vehicle-mounted charging device according to claim 1, characterized in that: The top end of the lower shell (3) is provided with a slot (31) matched with the upper shell (2); the bottom end of the upper shell (2) is provided with an L-shaped cavity (21); the plug-in comprises a card strip (8), a stopper (81), a guide rod (82), a card block (83) and a fixing frame (84); the card strip (8) is arranged in the slot (31); the fixing frame (84) is located at the top edge of the slot (31) on the lower shell (3); the stopper (81), the guide rod (82) and the card block (83) are all arranged in the L-shaped cavity (21) and are connected in sequence; and a spring (85) is sleeved on the guide rod (82).

4. A high-power vehicle-mounted charging device according to claim 3, characterized in that: The L-shaped cavity (21) is connected to the bottom end and the side of the upper shell (2). A limiting plate (86) is provided in the L-shaped cavity (21) near the side of the upper shell (2). A through hole matching the guide rod (82) is provided on the limiting plate (86).

5. A high-power vehicle-mounted charging device according to claim 1, characterized in that: The side of the upper shell (2) is provided with a connecting through hole corresponding to the input port (11) and the output port (12).

6. A high-power vehicle-mounted charging device according to claim 1, characterized in that: The input port (11) is additionally provided with two spare PIN pins, the control unit comprises a CP / CC detection circuit, a CAN communication circuit and a charging monitoring circuit, the power unit comprises an input rectifier circuit, an inverter circuit and an output rectifier circuit, the CP / CC detection circuit is arranged between the input port (11) and the input rectifier circuit, the CAN communication circuit and the charging monitoring circuit are both arranged between the output rectifier circuit and the output port (12), and the output port (12) comprises two PIN ports for the positive and negative poles of a low-voltage auxiliary power supply, two PIN ports for the positive and negative poles of a high-voltage charging circuit, a chassis ground, communication lines CANH and CANL, and a charging request signal line.

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