A charging module using an ultra-wide voltage output range interleaved rectifier circuit

Abstract

The present invention relates to the technical field related to charging of new energy vehicles, and specifically to a charging module using an interleaved rectifier circuit with an ultra-wide voltage output range. The charging module using the interleaved rectifier circuit with an ultra-wide voltage output range comprises: an A-way, a B-way, a VBusPM / MN voltage difference detection module, an A-way PWM drive module, a B-way PWM drive module, a dual-way complementary PWM signal module, a PWM master controller, a signal feedback module, an output sampling module and a main drive module; the main architecture has two full-bridge LLC resonances, and a DC conversion topology in a 90° phase interleaved parallel manner, an input end external midpoint potential detection, and a voltage difference detection circuit result, which directly controls the drive signal of the two-way power switch group, and tracks and forces the midpoint potential to be balanced in real time by changing the transmission power of the two-way converter, so that the two-way power transmission transformers are respectively designed to have two winding outputs, and at the same time, the output switch group is controlled to achieve series-parallel connection, directly doubling the original output range of the topology.

Description

Technical Field

[0001] The present invention relates to the technical field related to new energy vehicle charging, and in particular to a charging module using an interleaved rectifier circuit with an ultra-wide voltage output range. Background Art

[0002] Under the general environment of advocating environmental protection all over the world and the country encouraging and comprehensively promoting the application and development of new energy vehicles, industrial technology has developed rapidly, electric vehicles are of various forms, and the nominal voltage of battery packs is also different. Special-purpose electric vehicles are mainly 48V, 80V, 144V and other voltages, two-seater and four-seater passenger cars are mostly 100V-320V, five-seater cars are mostly 320V-550V, and large-scale special-purpose electric vehicles are mostly 500V-750V. At present, high-power charging modules on the market are mainly divided into three types of output: 30-100V, 100V-200V, 200V-750V, and 300V-1000V. In this case, the voltage and current of the charging module cannot meet the charging matching of the above vehicles. The lack of universality of the module causes the charging equipment to be non-universal, resulting in charging inconvenience, and also forms a certain waste of resources;

[0003] The charging module used in high-power charging equipment directly determines the charging efficiency. The mainstream charging module circuit topology on the market is mainly based on LLC resonance. This topology has high conversion efficiency, low cost, and extremely strong cost-effectiveness, but its biggest disadvantage is that the output range is insufficient. When some products use low-voltage output, the driving pulse changes from frequency modulation to width modulation. In the width modulation mode, when the pulse width changes too much, the basic working form of the LLC resonant circuit topology will be changed, and the working efficiency and reliability will be greatly reduced. At the same time, the discontinuous output current of the LLC resonant circuit topology after rectification causes a large ripple current in the filter capacitor. High ripple current is the biggest culprit for the failure of the filter capacitor, and the situation is more serious in the width modulation mode;

[0004] When designing a wide output voltage charging module, due to the wide output voltage range and the requirement for constant power, the constant power in the full voltage range will make the current of the charging module very large at low voltage output, so it is difficult for charging modules on the market to meet the charging needs of high voltage and high current. This is mainly due to the selection of output rectifier devices and filter capacitors; the requirement to meet the highest withstand voltage while meeting the high current at low voltage will inevitably result in high cost of rectifier devices, and filter capacitors are bound to be large in size due to the high voltage and capacity, and a large number must be selected to suppress ripple current when low voltage and high current are used. This makes the design of the DC conversion of the charging module's later stage difficult and the cost is relatively high;

[0005] At present, the front-stage active power factor correction of high-power charging modules mostly adopts Vienna PFC, which has mature circuits and digital algorithms. The output voltage to the back-stage is 800V DC, and the output capacitors are connected in series with a voltage division of 400V each, with a midpoint potential. The back-stage DC conversion adopts two LLC harmonic series power supply, which are connected in parallel after rectification. The disadvantage of the two topologies of this architecture is that under heavy load conditions, when the grid voltage is unstable or the two-way power is unbalanced due to device differences, the midpoint potential of the series capacitor drifts. If the midpoint potential drift is too large and cannot be controlled in time, it will cause some devices to be damaged due to excessive voltage stress. For this reason, the present invention proposes a charging module using an ultra-wide voltage output range interleaved rectifier circuit to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a charging module using an interleaved rectifier circuit with an ultra-wide voltage output range to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a charging module using an ultra-wide voltage output range interleaved rectifier circuit, the charging module using an ultra-wide voltage output range interleaved rectifier circuit comprising: an A-way, a B-way, a VBusPM / MN voltage difference detection module, an A-way PWM drive module, a B-way PWM drive module, a dual-way complementary PWM signal module, a PWM master controller, a signal feedback module, an output sampling module and a main drive module;

[0008] The VBusPM / MN voltage difference detection module is used to detect the voltage difference between VBusPM and VBusMN. C1 in the VBusPM and C2 in the VBusMN are connected in series. The voltage between C1 and C2 is the midpoint voltage. The positive terminal of C1 is the high-side voltage, and the negative terminal of C2 is the low-side voltage. The voltage difference detection result between VBusPM and VBusMN is sent to the A-channel PWM driving module and the B-channel PWM driving module to drive and control the transmission power differentiation of the A-channel and the B-channel.

[0009] The A-channel PWM driving module is used to amplify and enhance the signal of the dual-channel complementary PWM signal module and send it to the A-channel KD1 full-bridge switch group, and is also controlled by the VBusPM / MN voltage difference detection module in small amounts;

[0010] The B-channel PWM driving module is used to amplify and enhance the signal of the dual-channel complementary PWM signal module and send it to the B-channel KD2 full-bridge switch group, and is also controlled by the VBusPM / MN voltage difference detection module in small amounts;

[0011] The dual-channel complementary PWM signal module generates a basic signal from the PWM master controller, and parses the basic signal into two complementary PWM signals, and the phases of the two PWM waves are 90°;

[0012] The PWM master controller generates a closed-loop frequency-modulated PFM basic PWM wave through a signal feedback module, and also assumes protection functions such as soft start, over-power, over-voltage, under-voltage, over-current, and over-temperature;

[0013] The signal feedback module is used to collect the signal of the output sampling module and feed it back to the PWM main controller in a closed loop;

[0014] The output sampling module is used to collect the voltage on C3 after rectification and filtering of path A and the voltage on C4 after rectification and filtering of path B, and send the processed results to the signal feedback module and the main drive module respectively;

[0015] The main driving module is used to compare the signal of the output sampling module with the circuit setting value, and then send out a driving signal to control KD3 to realize the series connection and parallel connection of the A path and the B path.

[0016] Preferably, the LC1 circuit in the A path is output by two windings L13 and L14, and the L13 and L14 are rectified by BD1 and BD2 to form a DC output respectively. The LC2 circuit in the B path is output by two windings L23 and L24, and the L23 and L24 are rectified by BD3 and BD4 to form a DC output respectively.

[0017] Preferably, when the PWM main controller receives an over-temperature signal through the signal feedback module, the PWM main controller controls the heat dissipation air pump in the charging pile body to operate, and the charging pile body is provided with an installation cavity, an air intake cavity, an air pump cavity and a water storage cavity, the air intake cavity and the air pump cavity are located on the lower side of the installation cavity, and the air intake cavity and the air pump cavity are interconnected, the water storage cavity is located at the lower end of the charging pile body, water is injected into the water storage cavity, and the water storage capacity in the water storage cavity is three quarters of the water storage cavity volume.

[0018] Preferably, the electrical components of the charging module are arranged in a charging module shell, and the charging module shell is fixed in an installation cavity. A installation cavity door is provided at the port of the installation cavity. A heat conducting plate is fittedly installed on the outer wall of the charging module shell. The installation cavity and the water storage cavity are connected through a connecting cavity, and the connecting cavity is not connected with the air inlet cavity and the air pump cavity. A heat conducting column is integrally formed on the lower side of the heat conducting plate, and the heat conducting column passes through the connecting cavity and extends into the water storage cavity. The side of the heat conducting column and the side wall of the connecting cavity are sealed with waterproof glue. A heat exchange fin is integrally formed on the lower side end of the heat conducting column, and a plurality of heat exchange fins are arranged at equal intervals. The heat conducting plate, the heat conducting column and the heat exchange fins are all cast from copper.

[0019] Preferably, the heat dissipation air pump is arranged in the middle position of the air pump cavity, and the outer wall of the heat dissipation air pump and the air pump cavity are filled and sealed by filling rubber, the air inlet end of the heat dissipation air pump is located in the air inlet cavity, and the exhaust end of the heat dissipation air pump is located at the inner end of the air pump cavity, an air channel is opened on the side wall of the inner end of the air pump cavity, air cavities are opened on the left and right sides of the charging pile body, the air channel is connected to the air cavity, a first-level air port is opened at the uppermost position of the side wall of the water storage cavity, a second-level air port is opened on the side wall of the air cavity, and heat dissipation fins are fixedly installed on the left and right side walls of the charging pile body.

[0020] Preferably, the heat dissipation fins are provided with a main water vapor flow channel, a secondary water vapor flow channel and an air duct, the secondary water vapor flow channel is symmetrically arranged in a group, and the secondary water vapor flow channel is connected to the main water vapor flow channel, a primary docking port is provided on the side of the main water vapor flow channel, the primary docking port is connected to the primary air port, a secondary docking port is provided on the lower side end side wall of the air duct, the secondary docking port is connected to the secondary air port, the secondary water vapor flow channel is symmetrically arranged in a group, and the secondary water vapor flow channels are located on both sides of the air duct, and the air duct is not connected to the main water vapor flow channel and the secondary water vapor flow channel, sealing grooves are provided at the edge positions of the primary air port and the secondary air port, and a primary sealing sheet and a secondary sealing gasket are respectively embedded in the sealing grooves at the edges of the primary air port and the secondary air port, and when the heat dissipation fins are actually installed, the primary sealing sheet and the secondary sealing gasket are both in a pressurized state.

[0021] Preferably, a plurality of heat dissipation fins are evenly spaced on both sides of the charging pile body, and adjacent heat dissipation fins are connected by a connecting plate, and the connecting plate is fixedly connected to the side wall of the charging pile body by positioning screws, the upper end of the secondary water vapor flow channel is sealed, and the upper port of the air duct is downwardly facing.

[0022] Preferably, a dustproof mesh plate is provided at the port of the air inlet cavity, a mounting plate is provided at the middle position of the air inlet cavity, a threaded hole is opened on the mounting plate, and a dust filtering mechanism is threadedly connected to the mounting plate, and the mounting plate is composed of a combination of an iron plate and a sound insulation plate.

[0023] Preferably, the dust filtering mechanism is composed of a threaded tube and a filter ball, the threaded tube and the filter ball are integrally formed, the threaded tube is screwed into a threaded hole on the mounting plate, and filter holes are evenly opened on the spherical surface of the filter ball.

[0024] Preferably, the filter ball is composed of a first hemisphere and a second hemisphere, the first hemisphere and the second hemisphere are threadedly connected, and a sponge ball is inserted between the first hemisphere and the second hemisphere.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The patent of the present invention is applied in a high-power charging module, and the shortcomings mentioned in the background technology are integrated and optimized. Its main architecture is a two-way full-bridge LLC resonance, and the DC conversion topology is in a 90° phase staggered parallel mode. The input end is externally connected with the midpoint potential detection, and the result of the voltage difference detection circuit directly controls the driving signal of the two-way power switch group. By changing the transmission power of the two-way converter, the midpoint potential is tracked and forced to be balanced in real time, so that the two-way power transmission transformer is designed as two winding outputs respectively, and two staggered parallel DCs are obtained after rectification. The output filter capacitor current ripple is greatly reduced. In the low-voltage and high-current output condition, the number of filter capacitors is reduced to one-third of the original. At the same time, by controlling the output switch group to achieve series-parallel connection, the original output range of the topology is directly doubled. When connected in series, the requirements for component withstand voltage at high-voltage output are taken into account, and when connected in parallel, the requirements for component high current at low-voltage output are taken into account. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a circuit diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the present invention;

[0029] Figure 3 It is a transverse half-section view of the present invention;

[0030] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0031] Figure 5 It is a longitudinal half-section view of the present invention;

[0032] Figure 6 for Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0033] Figure 7 It is a schematic diagram of the connection of the heat conducting plate, the heat conducting column and the heat exchanging fins of the present invention;

[0034] Figure 8 This is a schematic diagram of the distribution of heat dissipation fins of the present invention;

[0035] Fig. 9 for Figure 8 A magnified schematic diagram of the structure at C in the middle;

[0036] Fig.10 It is a schematic diagram of the heat dissipation fin structure of the present invention;

[0037] Fig.11 for Fig.10 A magnified schematic diagram of the structure at D in the middle;

[0038] Fig.12A half-section view of the heat dissipation fin of the present invention in the transverse direction;

[0039] Fig.13 for Fig.12 The enlarged schematic diagram of the structure at E in the middle;

[0040] Fig.14 for Fig.12 The enlarged schematic diagram of the structure at F in the middle;

[0041] Fig.15 A longitudinal half-section view of the heat dissipation fin of the present invention;

[0042] Fig.16 for Fig.15 A magnified schematic diagram of the structure at G in the middle;

[0043] Fig.17 It is a schematic diagram of the dust filtering mechanism of the present invention;

[0044] Fig.18 A half-section view of the dust filter mechanism of the present invention;

[0045] Fig.19 for Fig.18 A magnified schematic diagram of the structure at H in the middle;

[0046] Fig. 20 It is a schematic diagram of the interior of the dust filtering mechanism of the present invention.

[0047] In the figure: VBusPM / MN voltage difference detection module 1, A-channel PWM drive module 2, B-channel PWM drive module 3, dual-channel complementary PWM signal module 4, PWM master controller 5, signal feedback module 6, output sampling module 7, main drive module 8, charging pile body 11, installation cavity 12, charging module shell 13, air inlet cavity 14, air pump cavity 15, water storage cavity 16, heat conduction plate 17, heat conduction column 18, heat exchange fin 19, first-level air port 20, air duct 21 , air cavity 22, secondary air port 23, heat dissipation fins 24, heat dissipation air pump 25, main water vapor flow channel 26, secondary water vapor flow channel 27, air duct 28, primary docking port 29, secondary docking port 30, primary sealing sheet 31, secondary sealing gasket 32, connecting plate 33, dustproof mesh plate 34, mounting plate 35, dust filtering mechanism 36, iron plate 37, sound insulation board 38, threaded pipe 39, filter ball 40, filter hole 41, first hemisphere 42, second hemisphere 43, sponge ball 44. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figure 1-20 The present invention provides the following four preferred embodiments:

[0050] Embodiment 1

[0051] A charging module using an ultra-wide voltage output range interleaved rectifier circuit, the charging module using an ultra-wide voltage output range interleaved rectifier circuit comprising: A-way, B-way, VBusPM / MN voltage difference detection module 1, A-way PWM drive module 2, B-way PWM drive module 3, dual-way complementary PWM signal module 4, PWM master controller 5, signal feedback module 6, output sampling module 7 and main drive module 8, VBusPM / MN voltage difference detection module 1 is used to detect the voltage difference between VBusPM and VBusMN, C1 in VBusPM and C2 in VBusMN are connected in series, the midpoint voltage is between C1 and C2, the positive terminal of C1 is the high side voltage, the negative terminal of C2 is the low side voltage, and VBusPM The voltage difference detection result with VBusMN is sent to the A-way PWM driving module 2 and the B-way PWM driving module 3 to drive and control the transmission power differentiation of A-way and B-way. The A-way PWM driving module 2 is used to amplify and enhance the signal of the dual-channel complementary PWM signal module 4 and send it to the A-way KD1 full-bridge switch group, and at the same time is controlled by a small amount of the VBusPM / MN voltage difference detection module 1. The B-way PWM driving module 3 is used to amplify and enhance the signal of the dual-channel complementary PWM signal module 4 and send it to the B-way KD2 full-bridge switch group, and at the same time is controlled by a small amount of the VBusPM / MN voltage difference detection module 1. The dual-channel complementary PWM signal module 4 generates a basic signal by the PWM master controller 5, and the basic signal is parsed into two The two PWM waves are complementary PWM signals, and the phase of the two PWM waves is 90°. The PWM main controller 5 generates a closed-loop frequency-modulated PFM basic PWM wave through the signal feedback module 6, and at the same time undertakes soft start, over-power, over-voltage, over-current, over-temperature and other protection functions. The signal feedback module 6 is used to collect the signal of the output sampling module 7 and feedback it to the PWM main controller 5 in a closed loop. The output sampling module 7 is used to collect the voltage on C3 after rectification and filtering of the A path and C4 after rectification and filtering of the B path, and send the processed results to the signal feedback module 6 and the main drive module 8 respectively. The main drive module 8 is used to compare the signal of the output sampling module 7 with the circuit setting value, and then send the drive signal control KD3 to realize the series and parallel connection of the A path and the B path.

[0052] The LC1 circuit in path A outputs the two windings L13 and L14, which are then rectified by BD1 and BD2 to form a DC output. The LC2 circuit in path B outputs the two windings L23 and L24, which are then rectified by BD3 and BD4 to form a DC output.

[0053] When Vin+, VinM, and Vin- are used for power supply, the output sampling module 7 detects the voltage of VO+ and VO-, or the main driving module 8 receives the main control output setting of the whole machine and gives a driving signal, and closes K1 or K2 and K3, thereby placing the two conversion circuits in series or parallel. Through the cooperation of the two conversion circuits, assuming that the output is low voltage and high current, K2 and K3 will be closed and the conversion circuits will be placed in parallel. The PWM master controller 5 sends out a PWM basic signal, and the dual-channel complementary PWM signal module 4 analyzes two complementary PWM signals with a phase of 90° based on the basic signal and transmits them to the A-channel PWM driving module 2 and the B-channel PWM driving module 3 respectively. The A-channel PWM driving module 2 and the B-channel PWM driving module 3 detect the voltage difference between VBusPM and VBusMN based on the VBusPM / MN voltage difference detection module 1, respectively fine-tune the pulse width of the PWM wave, and then amplify and send it to the LLC full-bridge resonant topology circuit of the A-channel and the B-channel. KD1 and KD2 are respectively the primary switch groups of the A-channel and the B-channel power circuits, which are composed of multiple high-frequency semiconductor switch devices inside to realize the conversion of the PWM driving signal into the high-power switch pulse of LC1 and LC2. LC1 and LC2 have built-in resonant capacitors CC1 and CC2, resonant inductors L11 and L21, and high-frequency transformers to form LLC resonant topology. The secondary side of the high-frequency transformer senses the voltage of the primary side, and L13 and L14 of the A-channel are output to BD1 and BD2 respectively, and L23 and L24 of the B-channel are output to BD3 and BD4 respectively. BD1 and BD3 are connected in parallel to C3 after rectification, and BD2 and BD4 are connected in parallel to C4 after rectification. Since the PWM signal phases of A and B are 90°, the currents on C3 and C4 are the synthesis of the two phase currents. Therefore, K2 and K3 are set to be closed before, and the output part is in parallel. In fact, L13, L14, L23, L24 and BD1, BD2, BD3, BD4, four-way induction rectification and C3, C4, two-way filtering are connected in parallel as a whole. After multiple currents are connected in parallel, constant power output of low voltage and high current can be easily achieved.

[0054] Assuming the output is high voltage, K2 and K3 will be disconnected and K1 will be closed. L13, L23 and BD1, BD3 are induced and rectified to C3, L14, L24 and BD2, BD4 are induced and rectified to C4, the voltage on C3 and C4 is filtered and connected in series, the two voltages are superimposed to achieve double the high voltage output;

[0055] In addition, in order to solve the problem of midpoint potential M offset, the input voltage difference detection circuit 1 in the present invention actively controls the power of A and B paths, forcing the voltage balance of VBusPM and VBusMN to be balanced, which is an integral part of the DC converter of the present invention;

[0056] The output part KD3 switch group, as an important component of converter output switching, is inseparable from the overall DC converter;

[0057] The A-way and B-way high-frequency transformers are rectified to C3 and C4 through multi-winding output, which minimizes the ripple current in the C3 and C4 circuits, reduces the number of capacitors and the requirements for ripple resistance, and the load is the same in different KD3 switching states. The voltage and current stress of the secondary components is optimized, and the device has strong selectivity and a more guaranteed design life.

[0058] The circuit structure principle example of the present invention is two main power channels, four secondary windings and rectification, and distributed interleaved two-channel filtering. In actual product design, it can be increased according to application requirements, and more levels of series and parallel can be used to achieve larger current and wider voltage range;

[0059] Embodiment 2

[0060] On the basis of the first embodiment, when the PWM main controller 5 receives the over-temperature signal through the signal feedback module 6, the PWM main controller 5 controls the heat dissipation air pump 25 in the charging pile body 11 to operate. The charging pile body 11 is provided with an installation cavity 12, an air intake cavity 14, an air pump cavity 15 and a water storage cavity 16. The air intake cavity 14 and the air pump cavity 15 are located on the lower side of the installation cavity 12, and the air intake cavity 14 and the air pump cavity 15 are connected. The water storage cavity 16 is located at the lower end of the charging pile body 11. Water is injected into the water storage cavity 16, and the water storage amount in the water storage cavity 16 is three quarters of the volume of the water storage cavity 16. By opening the installation cavity 12, the air intake cavity 14, the air pump cavity 15 and the water storage cavity 16 on the charging pile body 11, and injecting water into the water storage cavity 16, the water body absorbs heat when the charging module is running, and naturally dissipates heat when the charging module stops operating, thereby effectively reducing the energy consumption of the heat dissipation structure, which is very green and environmentally friendly.

[0061] Embodiment 3

[0062] On the basis of the second embodiment, the electrical components of the charging module are arranged in the charging module housing 13, the charging module housing 13 is fixed in the installation cavity 12, the port of the installation cavity 12 is provided with an installation cavity door body, and a heat conducting plate 17 is fittedly installed on the outer wall of the charging module housing 13. The installation cavity 12 and the water storage cavity 16 are connected through the connecting cavity, and the connecting cavity is not connected with the air inlet cavity 14 and the air pump cavity 15. A heat conducting column 18 is integrally formed on the lower side of the heat conducting plate 17, and the heat conducting column 18 passes through the connecting cavity. The cavity extends into the water storage cavity 16, the side of the heat conducting column 18 and the side wall of the connecting cavity are sealed by waterproof glue, the lower side end of the heat conducting column 18 is integrally formed with a heat exchange fin 19, and a plurality of heat exchange fins 19 are arranged at equal intervals. The heat conducting plate 17, the heat conducting column 18, and the heat exchange fins 19 are all cast from copper. The heat generated during the operation of the charging module is guided into the water storage cavity 16 through the heat conducting plate 17, the heat conducting column 18, and the heat exchange fins 19 to exchange heat with the water body, thereby improving the cooling effect on the charging module.

[0063] The heat dissipation air pump 25 is arranged in the middle of the air pump cavity 15, and the outer wall of the heat dissipation air pump 25 and the air pump cavity 15 are filled and sealed by filling rubber, the air inlet end of the heat dissipation air pump 25 is located in the air inlet cavity 14, and the exhaust end of the heat dissipation air pump 25 is located at the inner end of the air pump cavity 15, an air passage 21 is opened on the inner end side wall of the air pump cavity 15, and air cavities 22 are opened on the left and right sides of the charging pile body 11, and the air passage 21 is connected with the air cavity 22, and a first-level air port 20 is opened at the uppermost position of the side wall of the water storage cavity 16, and the air cavity A secondary air inlet 23 is provided on the side wall of the charging pile 22, and heat dissipation fins 24 are fixedly installed on the left and right side walls of the charging pile body 11. The heat dissipation fins 24 are provided with a main water vapor flow channel 26, a secondary water vapor flow channel 27 and an air duct 28. The secondary water vapor flow channel 27 is symmetrically arranged in a group, and the secondary water vapor flow channel 27 is connected to the main water vapor flow channel 26. A primary docking port 29 is provided on the side of the main water vapor flow channel 26, and the primary docking port 29 is connected to the primary air inlet 20. A secondary docking port 30 is provided on the side wall of the lower side end of the air duct 28. The secondary docking port 30 is arranged in connection with the secondary air port 23, a group of secondary water vapor flow channels 27 are symmetrically arranged, and the secondary water vapor flow channels 27 are arranged on both sides of the air duct 28, and the air duct 28 is not connected with the main water vapor flow channel 26 and the secondary water vapor flow channel 27. The edges of the primary air port 20 and the secondary air port 23 are provided with sealing grooves, and the sealing grooves at the edges of the primary air port 20 and the secondary air port 23 are respectively embedded with a primary sealing sheet 31 and a secondary sealing gasket 32. When the heat dissipation fins 24 are actually installed, the primary sealing The sheet 31 and the secondary sealing gasket 32 ​​are all in a pressurized state, and the main water vapor flow channel 26, the secondary water vapor flow channel 27 and the air duct 28 are opened on the heat dissipation fin 24, so that the steam generated by absorbing heat in the water storage chamber 16 can flow into the secondary water vapor flow channel 27, and the heat dissipation air pump 25 allows the air duct 28 to generate flowing gas, so that the steam in the secondary water vapor flow channel 27 is condensed and refluxed into the water storage chamber 16, thereby ensuring that the temperature of the water in the water storage chamber 16 can be maintained within a suitable range, thereby ensuring the heat exchange effect.

[0064] A plurality of heat dissipation fins 24 are evenly spaced on both sides of the charging pile body 11, and adjacent heat dissipation fins 24 are connected by connecting plates 33, and the connecting plates 33 are fixedly connected to the side walls of the charging pile body 11 by positioning screws. The upper end of the secondary water vapor flow channel 27 is sealed, and the upper port of the air duct 28 is downwardly facing to prevent rainwater and dust from falling into the air duct 28.

[0065] Embodiment 4

[0066] On the basis of the third embodiment, a dustproof mesh plate 34 is provided at the port of the air inlet cavity 14, a mounting plate 35 is provided at the middle position of the air inlet cavity 14, a threaded hole is opened on the mounting plate 35, and a dust filtering mechanism 36 is threadedly connected to the mounting plate 35, and the mounting plate 35 is composed of an iron plate 37 and a sound insulation plate 38. The sound insulation plate 38 can isolate the operating noise of the heat dissipation air pump 25, and the dustproof mesh plate 34 can reduce the dust from being inhaled and affecting the heat exchange effect.

[0067] The dust filtering mechanism 36 is composed of a threaded tube 39 and a filter ball 40, which are integrally formed. The threaded tube 39 is screwed into the threaded hole on the mounting plate 35, and filter holes 41 are evenly opened on the spherical surface of the filter ball 40. By configuring the dust filtering mechanism 36 to be composed of a threaded tube 39 and a filter ball 40, the dust filtering effect is further improved.

[0068] The filter ball 40 is composed of a first hemisphere 42 and a second hemisphere 43, the first hemisphere 42 and the second hemisphere 43 are threadedly connected, and a sponge ball 44 is inserted between the first hemisphere 42 and the second hemisphere 43. The filter ball 40 is configured to be composed of the first hemisphere 42 and the second hemisphere 43, so that it is easy to clean the filter ball 40, and the sponge ball 44 inside the filter ball 40 can further improve the filtering effect on dust, and the sponge ball 44 also has the function of assisting in absorbing noise.

[0069] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A charging module using an ultra-wide voltage output range interleaved rectifier circuit, characterized in that: The charging module using the ultra-wide voltage output range interleaved rectifier circuit comprises: an A-channel, a B-channel, a VBusPM / MN voltage difference detection module (1), an A-channel PWM drive module (2), a B-channel PWM drive module (3), a dual-channel complementary PWM signal module (4), a PWM master controller (5), a signal feedback module (6), an output sampling module (7) and a main drive module (8); The VBusPM / MN voltage difference detection module (1) is used to detect the voltage difference between VBusPM and VBusMN, C1 in the VBusPM and C2 in the VBusMN are connected in series, the voltage between C1 and C2 is a midpoint voltage, the positive terminal of C1 is a high-side voltage, and the negative terminal of C2 is a low-side voltage, and the voltage difference detection result between VBusPM and VBusMN is sent to the A-channel PWM driving module (2) and the B-channel PWM driving module (3) to drive and control the transmission power differentiation between the A-channel and the B-channel; The A-channel PWM driving module (2) is used to amplify and enhance the signal of the dual-channel complementary PWM signal module (4) and send it to the A-channel KD1 full-bridge switch group, and is also controlled in small amounts by the VBusPM / MN voltage difference detection module (1); The B-channel PWM driving module (3) is used to amplify and enhance the signal of the dual-channel complementary PWM signal module (4) and send it to the B-channel KD2 full-bridge switch group, and is also controlled in small amounts by the VBusPM / MN voltage difference detection module (1); The dual-channel complementary PWM signal module (4) generates a basic signal from a PWM main controller (5), and parses the basic signal into two complementary PWM signals, wherein the phases of the two PWM waves are 90°; The PWM main controller (5) generates a closed-loop frequency-modulated PFM basic PWM wave through a signal feedback module (6), and simultaneously assumes the functions of soft start, over-power, over-voltage, under-voltage, over-current, and over-temperature protection; The signal feedback module (6) is used to collect the signal of the output sampling module (7) and feed it back to the PWM main controller (5) in a closed loop; The output sampling module (7) is used to collect the voltage on C3 after rectification and filtering of the A path and the voltage on C4 after rectification and filtering of the B path, and send the processed results to the signal feedback module (6) and the main drive module (8) respectively; The main driving module (8) is used to compare the signal of the output sampling module (7) with the circuit setting value, and then send out a driving signal to control KD3 to realize the series connection and parallel connection of the A path and the B path; The LC1 circuit in the A path is output by two windings L13 and L14, and the L13 and L14 are rectified by BD1 and BD2 to form a DC output. The LC2 circuit in the B path is output by two windings L23 and L24, and the L23 and L24 are rectified by BD3 and BD4 to form a DC output. When the PWM main controller (5) receives an over-temperature signal through the signal feedback module (6), the PWM main controller (5) controls the heat dissipation air pump (25) in the charging pile body (11) to operate. The charging pile body (11) is provided with an installation cavity (12), an air intake cavity (14), an air pump cavity (15) and a water storage cavity (16). The air intake cavity (14) and the air pump cavity (15) are located on the lower side of the installation cavity (12), and the air intake cavity (14) and the air pump cavity (15) are connected. The water storage cavity (16) is located at the lower end of the charging pile body (11). Water is injected into the water storage cavity (16), and the amount of water stored in the water storage cavity (16) is three quarters of the volume of the water storage cavity (16); The electrical components of the charging module are arranged in a charging module housing (13), the charging module housing (13) is fixed in the installation cavity (12), a port of the installation cavity (12) is provided with an installation cavity door, a heat conducting plate (17) is fitted on the outer wall of the charging module housing (13), the installation cavity (12) and the water storage cavity (16) are connected via a connecting cavity, and the connecting cavity is not connected to the air inlet cavity (14) and the air pump cavity (15). A heat-conducting column (18) is integrally formed on the lower side of the heat-conducting plate (17), the heat-conducting column (18) passes through the connecting cavity and extends into the water storage cavity (16), the side of the heat-conducting column (18) and the side wall of the connecting cavity are sealed by waterproof glue, a heat-exchange fin (19) is integrally formed on the lower side of the heat-conducting column (18), a plurality of heat-exchange fins (19) are arranged at equal intervals, and the heat-conducting plate (17), the heat-conducting column (18), and the heat-exchange fins (19) are all made of copper casting; The heat dissipation air pump (25) is arranged in the middle of the air pump cavity (15), and the outer wall of the heat dissipation air pump (25) and the air pump cavity (15) are filled and sealed by filling rubber, the air inlet end of the heat dissipation air pump (25) is located in the air inlet cavity (14), and the exhaust end of the heat dissipation air pump (25) is located at the inner end of the air pump cavity (15), an air channel (21) is opened on the inner end side wall of the air pump cavity (15), the left and right sides of the charging pile body (11) are both opened with air cavities (22), the air channel (21) and the air cavity (22) are connected, a first-level air port (20) is opened at the uppermost position of the side wall of the water storage cavity (16), a second-level air port (23) is opened on the side wall of the air cavity (22), and heat dissipation fins (24) are fixedly installed on the left and right side walls of the charging pile body (11); The heat dissipation fin (24) is provided with a main water vapor flow channel (26), a secondary water vapor flow channel (27) and an air duct (28); the secondary water vapor flow channel (27) is symmetrically arranged in a group, and the secondary water vapor flow channel (27) is connected to the main water vapor flow channel (26); a primary docking port (29) is provided on the side of the main water vapor flow channel (26), and the primary docking port (29) is arranged to be connected to the primary air port (20); a secondary docking port (30) is provided on the side wall of the lower side end of the air duct (28), and the secondary docking port (30) is arranged to be connected to the secondary air port (23); the secondary water vapor flow channel ( 27) are symmetrically arranged, and the secondary water vapor flow channel (27) is arranged on both sides of the air duct (28), and the air duct (28) is not connected to the main water vapor flow channel (26) and the secondary water vapor flow channel (27), and the edges of the primary air port (20) and the secondary air port (23) are provided with sealing grooves, and the sealing grooves at the edges of the primary air port (20) and the secondary air port (23) are respectively embedded with a primary sealing sheet (31) and a secondary sealing gasket (32), and when the heat dissipating fin (24) is actually installed, the primary sealing sheet (31) and the secondary sealing gasket (32) are both in a compressed state; A plurality of heat dissipation fins (24) are arranged at equal intervals on both sides of the charging pile body (11), and adjacent heat dissipation fins (24) are connected via a connecting plate (33). The connecting plate (33) is fixedly connected to the side wall of the charging pile body (11) via positioning screws. The upper end of the secondary water vapor flow channel (27) is sealed, and the upper port of the air duct (28) is arranged to face downward.

2. A charging module using an ultra-wide voltage output range interleaved rectifier circuit according to claim 1, characterized in that: A dustproof screen plate (34) is provided at the port of the air inlet cavity (14), a mounting plate (35) is provided at the middle position of the air inlet cavity (14), a threaded hole is provided on the mounting plate (35), a dust filter mechanism (36) is threadedly connected to the mounting plate (35), and the mounting plate (35) is composed of an iron plate (37) and a sound insulation plate (38).

3. A charging module using an ultra-wide voltage output range interleaved rectifier circuit according to claim 2, characterized in that: The dust filtering mechanism (36) is composed of a threaded tube (39) and a filter ball (40), wherein the threaded tube (39) and the filter ball (40) are integrally formed, the threaded tube (39) is screwed into a threaded hole on the mounting plate (35), and filter holes (41) are evenly formed on the spherical surface of the filter ball (40).

4. A charging module using an ultra-wide voltage output range interleaved rectifier circuit according to claim 3, characterized in that: The filter ball (40) is composed of a first hemisphere (42) and a second hemisphere (43), the first hemisphere (42) and the second hemisphere (43) are threadedly connected, and a sponge ball (44) is inserted between the first hemisphere (42) and the second hemisphere (43).

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