Vehicle boost charging device

Abstract

The present invention discloses a vehicle boost charging device, comprising: a battery, a boost charging capacitor, an electric drive device, a fast charging port, a boost charging line and a first magnetic ring, the boost charging line comprises a first section of the boost line and a second section of the boost line, one end of the boost charging capacitor is electrically connected to the fast charging port through the first section of the boost line, and is electrically connected to the motor through the second section of the boost line, the other end of the boost charging capacitor is electrically connected to the negative electrode line of the battery, the first magnetic ring is located between the fast charging port and the boost charging capacitor, and the first section of the boost line, the positive electrode line of the battery and the negative electrode line of the battery pass through the first magnetic ring. The present invention processes the loop noise between the boost device and the electric drive device by adding a first magnetic ring to the first section of the boost charging line of the boost charging line between the boost charging capacitor and the fast charging port, ensuring that the noise will not be conducted along the boost line, the positive electrode line of the battery, and the negative electrode line of the battery to the battery and the fast charging line.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-related technologies, and in particular to a vehicle boost charging device. Background Art

[0002] With the increasing popularity of electric vehicles, in order to achieve faster charging speeds and higher efficiency, high voltage has become an irreversible trend. Compared with the 400V low-voltage platform, the 800V high-voltage platform has improved the voltage range of the entire vehicle from the power battery to the voltage resistance level of electrical equipment. However, the speed of technological iteration of charging facilities is obviously slower than the development of new energy vehicles. The maximum output voltage specifications of most DC charging devices on the market are 750V or 500V, which cannot meet the charging requirements of up to 900V or even higher voltages under the high-voltage architecture. In order to solve this problem, it is necessary to add a boost circuit between the DC charging device and the power battery. The schematic diagram of the boost circuit is as follows Figure 1 As shown, the inductance of the motor and the switch tube of the motor controller are used to realize the function of a BOOST circuit to boost the voltage of the charging device to the battery voltage to charge the battery. A boost device 30000 is added between the original battery device 10000 and the electric drive device 20000. At the same time, in order to reduce the fluctuation of the charging input voltage during boost charging and suppress the noise interference of electromagnetic interference (EMI), the prior art adds a magnetic ring 40000 to the electric drive device 20000 and a magnetic ring 50000 to the boost charging line 60000. Among them, the battery device 10000 includes a battery 10001, a main positive relay 10002, a main negative relay 10003, a pre-charging resistor 10004, a pre-charging relay 10005, and a fast charging relay 10006. The electric drive device 20000 includes a motor controller 20001, a motor 20002 and a DC support capacitor (DCU) 20003. The motor controller 20001 includes a plurality of switch tubes Q1, Q2, Q3, Q4, Q5 and Q6. The boost device 30000 includes a boost charging capacitor 30001, a boost charging control relay 30002 and a boost charging capacitor control relay 30003, wherein the positive electrode 70001 of the fast charging port is electrically connected to the inductance of the motor 20002 through the boost charging line 60000. The positive electrode of the battery 10001 is electrically connected to the motor controller 20001 through the battery positive line 80001, and the negative electrode of the battery 10001 is electrically connected to the motor controller 20001 through the battery negative line 80002. The battery positive line 80001 and the battery negative line 80002 pass through the magnetic ring 40000. The fast charging port negative electrode 70002 is electrically connected to the battery negative electrode line 80002 through the fast charging negative electrode line 70003, and the boost charging capacitor 30001 is electrically connected to the boost charging line 60000 and the fast charging negative electrode line 70003 respectively to achieve voltage boost.

[0003] However, although the existing technology can realize the function of boost charging, only setting a magnetic ring in the electric drive device seriously worsens the conduction and radiation interference of the whole vehicle. The reasons are as follows: first, during boost charging, the magnetic ring 40000 fails due to the inconsistency between the currents of the two wires of the positive and negative electrodes of the battery, which causes it to enter a saturated state and fail, and cannot play a role in noise suppression; the noise will be conducted outward along the positive battery line 80001 and the negative battery line 80002; second, during driving, since the boost charging line 60000 is connected to the boost device 30000 without any noise suppression treatment, the position where it is connected to the motor controller 20001 is exactly the position where the power device of the motor controller 20001 switches quickly. The noise generated by the rapid voltage change at this position will be conducted outward along the boost line, making other parts of the whole vehicle susceptible to interference and the electromagnetic compatibility of the whole vehicle (Electro Magnetic Compatibility , EMC) is seriously deteriorated; third, a differential mode magnetic ring 50000 is added to the boost charging line, but the magnetic ring can only suppress the driving condition noise from being transmitted from the boost line. Under the boost charging condition, the magnetic ring will be saturated and lose its function; fourth, the negative pole of the battery is connected between the boost charging capacitor and the electric drive device. The noise in this place is very large, which will be radiated through the negative pole to the battery and then through the fast charging line. Summary of the invention

[0004] Based on this, it is necessary to provide a vehicle boost charging device to address the technical problem that the prior art boost charging circuit only sets a magnetic ring in the electric drive device, which causes the deterioration of conduction and radiation interference.

[0005] The present invention provides a vehicle boost charging device, comprising: a battery, a boost charging capacitor, an electric drive device, a fast charging port, a boost charging line and a first magnetic ring, the electric drive device comprising an electrically connected motor controller and a motor, the positive electrode of the battery is electrically connected to the motor controller through a battery positive line, the negative electrode of the battery is electrically connected to the motor controller through a battery negative line, the fast charging port is electrically connected to a connection point between the motor controller and the motor through the boost charging line, the boost charging line comprises a first section of the boost line and a second section of the boost line, one end of the boost charging capacitor is electrically connected to the fast charging port through the first section of the boost line, and is electrically connected to the motor through the second section of the boost line, the other end of the boost charging capacitor is electrically connected to the negative line of the battery, the first magnetic ring is located between the fast charging port and the boost charging capacitor, and the first section of the boost line, the positive line of the battery and the negative line of the battery pass through the first magnetic ring.

[0006] Furthermore, it also includes: a first capacitor filter combination and a second capacitor filter combination, the first section of the boost line includes a front portion of the first section of the boost line between the fast charging port and the first magnetic ring and a rear portion of the first section of the boost line between the first magnetic ring and the boost charging capacitor, the positive battery line includes a first section of the positive battery line between the battery and the first magnetic ring and a second section of the positive battery line between the first magnetic ring and the electric drive device, the negative battery line includes a first section of the negative battery line between the battery and the first magnetic ring and a second section of the negative battery line between the first magnetic ring and the electric drive device;

[0007] The first capacitor filter combination is electrically connected to the front part of the first section of the boost line, the first section of the battery positive line, and the first section of the battery negative line. The second capacitor filter combination is electrically connected to the rear part of the first section of the boost line, the second section of the battery positive line, and the second section of the battery negative line.

[0008] Furthermore, the first capacitor filter combination includes: a first combination of a first capacitor, a first combination of a second capacitor, a first combination of a third capacitor, and a first combination of a fourth capacitor, and the second capacitor filter combination includes a second combination of a first capacitor, a second combination of a second capacitor, a second combination of a third capacitor, and a second combination of a fourth capacitor, wherein:

[0009] The first capacitor of the first combination is electrically connected to the first section of the positive battery line and the first section of the negative battery line respectively; one end of the second capacitor of the first combination is electrically connected to the front part of the first section of the boost line, and the other end is electrically connected to one end of the third capacitor of the first combination; the other end of the third capacitor of the first combination is electrically connected to the first section of the negative battery line; one end of the fourth capacitor of the first combination is electrically connected to the front part of the first section of the boost line, and the other end is electrically connected to the first section of the negative battery line; the connection point between the second capacitor of the first combination and the third capacitor of the first combination is electrically connected to the battery housing;

[0010] One end of the second capacitor of the second combination is electrically connected to the second section of the battery positive line, and the other end is electrically connected to one end of the third capacitor of the second combination, the other end of the third capacitor of the second combination is electrically connected to the second section of the battery negative line, one end of the first capacitor of the second combination is electrically connected to the rear part of the first section of the boost line, and the other end is electrically connected to the connection point of the second capacitor of the second combination and the second combination third capacitor, the fourth capacitor of the second combination is electrically connected to the second section of the battery positive line and the second section of the battery negative line respectively, and the connection point of the second capacitor of the second combination and the second combination third capacitor is electrically connected to the battery case.

[0011] Further, the first combination first capacitor, the first combination fourth capacitor and the second combination fourth capacitor are X capacitors, and the first combination second capacitor, the first combination third capacitor, the second combination first capacitor, the second combination second capacitor and the second combination third capacitor are Y capacitors.

[0012] Furthermore, it also includes: a second magnetic ring located in the electric drive device, and the second section of the boost line, the battery positive line and the battery negative line pass through the second magnetic ring.

[0013] Furthermore, it also includes a third capacitor filter combination and a fourth capacitor filter combination, the second section of the boost line includes a front part of the second section of the boost line between the boost charging capacitor and the second magnetic ring and a rear part of the second section of the boost line between the second magnetic ring and the motor, the positive battery line includes a second section of the positive battery line between the first magnetic ring and the second magnetic ring and a third section of the positive battery line between the second magnetic ring and the electric drive device, and the negative battery line includes a second section of the negative battery line between the first magnetic ring and the second magnetic ring and a third section of the negative battery line between the second magnetic ring and the electric drive device;

[0014] The third capacitor filter combination is electrically connected to the front part of the second section of the boost line, the second section of the battery positive line, and the second section of the battery negative line. The fourth capacitor filter combination is electrically connected to the rear part of the second section of the boost line, the third section of the battery positive line, and the third section of the battery negative line.

[0015] Further, the third capacitor filter combination includes: a third combination first capacitor, a third combination second capacitor and a third combination third capacitor, and the fourth capacitor filter combination includes a fourth combination first capacitor, a fourth combination second capacitor and a fourth combination third capacitor, wherein:

[0016] The first capacitor of the third combination is electrically connected to the second section of the positive battery line and the second section of the negative battery line respectively, one end of the second capacitor of the third combination is electrically connected to the front part of the second section of the boost line, and the other end is electrically connected to one end of the third capacitor of the third combination, the other end of the third capacitor of the third combination is electrically connected to the second section of the negative battery line, and the connection point between the second capacitor of the third combination and the third capacitor of the third combination is electrically connected to the battery housing;

[0017] The first capacitor of the fourth combination is electrically connected to the third section of the battery positive line and the third section of the battery negative line respectively, one end of the second capacitor of the fourth combination is electrically connected to the third section of the battery positive line, and the other end is electrically connected to one end of the third capacitor of the fourth combination, the other end of the third capacitor of the fourth combination is electrically connected to the third section of the battery negative line, and the connection point of the second capacitor of the fourth combination and the third capacitor of the fourth combination is electrically connected to the battery case.

[0018] Further, the third combination first capacitor and the fourth combination first capacitor are X capacitors, and the third combination second capacitor, the third combination third capacitor, the fourth combination second capacitor, and the fourth combination third capacitor are Y capacitors.

[0019] Furthermore, the boost charging capacitor, the first magnetic ring, the first capacitor filter combination and the second capacitor filter combination are integrated in the electric drive device, and the vehicle boost charging device also includes: a third magnetic ring located between the fast charging port and the first capacitor filter combination, and the first section of the boost line, the battery positive line and the battery negative line pass through the third magnetic ring.

[0020] Furthermore, it also includes a fourth magnetic ring located at the fast charging port, the fast charging positive terminal of the fast charging port is electrically connected to the first section of the boost line, the fast charging negative terminal of the fast charging port is electrically connected to the battery negative line through the fast charging negative line, and the first section of the boost line and the fast charging negative line pass through the fourth magnetic ring.

[0021] The present invention processes the loop noise between the boost device and the electric drive device by adding a first magnetic ring to the first section of the boost charging line between the boost charging capacitor and the fast charging port, ensuring that the noise will not be conducted along the boost line, the battery positive line, and the battery negative line to the battery and the fast charging line. At the same time, since the first section of the boost line, the battery positive line, and the battery negative line are passed through the first magnetic ring together, it is ensured that the magnetic ring will not be saturated regardless of the boost charging condition or the driving condition, which effectively suppresses the noise interference of EMI. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a vehicle boost charging device in the prior art;

[0023] Figure 2 This is a schematic diagram of a vehicle boost charging device according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a vehicle boost charging device according to another embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a vehicle boost charging device according to yet another embodiment of the present invention.

[0026] Marking Description

[0027] 1. Battery; 101. Battery positive line; 1011. First section of battery positive line; 1012. Second section of battery positive line; 1013. Third section of battery positive line; 102. Battery negative line; 1021. First section of battery negative line; 1022. Second section of battery negative line; 1023. Third section of battery negative line; 2. Boost charging capacitor; 3. Electric drive device; 31. Motor controller; 311. First switch tube; 312. Second switch tube; 313. Third switch tube; 314 , the fourth switch tube; 315, the fifth switch tube; 316, the sixth switch tube; 32, the motor; 4, the fast charging port; 401, the fast charging positive terminal; 402, the fast charging negative terminal; 41, the boost charging line; 411, the first section of the boost line; 4111, the front part of the first section of the boost line; 4112, the rear part of the first section of the boost line; 412, the second section of the boost line; 4121, the front part of the second section of the boost line; 4122, the rear part of the second section of the boost line; 42, the fast charging negative line; 5, the first magnetic ring; 6, First capacitor filter combination; 61, first combination first capacitor; 62, first combination second capacitor; 63, first combination third capacitor; 64, first combination fourth capacitor; 7, second capacitor filter combination; 71, second combination first capacitor; 72, second combination second capacitor; 73, second combination third capacitor; 74, second combination fourth capacitor; 8, second magnetic ring; 9, third capacitor filter combination; 91, third combination first capacitor; 92, third combination second capacitor; 93, third combination third capacitor; 10, fourth capacitor filter combination; 1001, fourth combination first capacitor; 1002, fourth combination second capacitor; 1003, fourth combination third capacitor; 11, third magnetic ring; 12, fourth magnetic ring; 13, bus capacitor; 14, boost charging control relay; 15, boost charging capacitor control relay; 16, pre-charging resistor; 17, pre-charging relay; 18, fast charging relay; 19, main positive relay; 20, main negative relay; 21, battery device; 22, boost device. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. The same components are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] like Figure 2The figure shows a schematic diagram of a vehicle boost charging device according to an embodiment of the present invention, comprising: a battery 1, a boost charging capacitor 2, an electric drive device 3, a fast charging port 4, a boost charging line 41 and a first magnetic ring 5, wherein the electric drive device 3 comprises an electrically connected motor controller 31 and a motor 32, wherein the positive electrode of the battery 1 is electrically connected to the motor controller 31 via a battery positive line 101, the negative electrode of the battery 1 is electrically connected to the motor controller 31 via a battery negative line 102, and the fast charging port 4 is connected to the connection point between the motor controller 31 and the motor 32 via the boost charging line 41. Electrical connection, the boost charging line 41 includes a first section 411 of the boost line and a second section 412 of the boost line, one end of the boost charging capacitor 2 is electrically connected to the fast charging port 4 through the first section 411 of the boost line, and is electrically connected to the motor 32 through the second section 412 of the boost line, the other end of the boost charging capacitor 2 is electrically connected to the battery negative line 102, the first magnetic ring 5 is located between the fast charging port 4 and the boost charging capacitor 2, and the first section 411 of the boost line, the battery positive line 101 and the battery negative line 102 pass through the first magnetic ring 5.

[0030] Specifically, one end of the boost charging line 41 is connected to the positive pole of the fast charging port 4, and the other end is connected to the connection point of the motor controller 31 and the motor 32. One end of the boost charging capacitor 2 is connected to the boost charging line 41, and the other end is connected to the battery negative pole line 102. Boost charging is achieved through the boost charging capacitor 2.

[0031] In some embodiments, it also includes a boost charging control relay 14 and a boost charging capacitor control relay 15. The boost charging control relay 14, the boost charging capacitor 2, and the boost charging capacitor control relay 15 are electrically connected in sequence to form a boost device 22.

[0032] The battery 1 is electrically connected to the motor controller 31 of the electric drive device 3 via a battery positive line 101 and a battery negative line 102 .

[0033] In some embodiments, the battery device 21 further includes a pre-charging resistor 16, a pre-charging relay 17, a fast charging relay 18, a main positive relay 19, and a main negative relay 20. The battery 1, the pre-charging resistor 16, the pre-charging relay 17, the fast charging relay 18, the main positive relay 19, and the main negative relay 20 together constitute the battery device 21. Among them, the positive electrode of the battery 1 is electrically connected to the battery positive electrode line 101 through the main positive relay 19, and the negative electrode of the battery 1 is electrically connected to the battery negative electrode line 102 through the main negative relay 20. The positive terminal of the battery 1 is also electrically connected to the boost charging line 41 through the pre-charging resistor 16, the pre-charging relay 17, and the fast charging relay 18.

[0034] The boost charging capacitor 2 divides the boost charging line 41 into a first section 411 and a second section 412 of the boost line. The first section 411 of the boost line is located between the fast charging positive terminal 401 of the fast charging port 4 and the boost charging capacitor 2, and the second section 412 of the boost line is located between the boost charging capacitor 2 and the electric drive device 3.

[0035] Among them, the first section 411 of the boost line, the battery positive line 101 and the battery negative line 102 pass through the first magnetic ring 5. The first magnetic ring 5 clamps the boost charging line 41, the battery positive line 101 and the battery negative line 102 together to ensure that the magnetic ring will not be saturated regardless of the boost charging condition or the driving condition, thereby effectively suppressing noise.

[0036] The present invention processes the loop noise between the boost device and the electric drive device by adding a first magnetic ring to the first section of the boost charging line between the boost charging capacitor and the fast charging port, ensuring that the noise will not be conducted along the boost line, the battery positive line, and the battery negative line to the battery and the fast charging line. At the same time, since the first section of the boost line, the battery positive line, and the battery negative line are passed through the first magnetic ring together, it is ensured that the magnetic ring will not be saturated regardless of the boost charging condition or the driving condition, which effectively suppresses the noise interference of EMI.

[0037] Another embodiment of the present invention is a vehicle boost charging device, comprising: a battery 1, a boost charging capacitor 2, an electric drive device 3, a fast charging port 4, a boost charging line 41 and a first magnetic ring 5, wherein the electric drive device 3 comprises an electrically connected motor controller 31 and a motor 32, the positive electrode of the battery 1 is electrically connected to the motor controller 31 through a battery positive line 101, the negative electrode of the battery 1 is electrically connected to the motor controller 31 through a battery negative line 102, the fast charging port 4 is electrically connected to a connection point between the motor controller 31 and the motor 32 through the boost charging line 41, The boost charging line 41 includes a first section 411 and a second section 412 of the boost charging line. One end of the boost charging capacitor 2 is electrically connected to the fast charging port 4 through the first section 411 of the boost charging line, and is electrically connected to the motor 32 through the second section 412 of the boost charging line. The other end of the boost charging capacitor 2 is electrically connected to the battery negative line 102. The first magnetic ring 5 is located between the fast charging port 4 and the boost charging capacitor 2, and the first section 411 of the boost charging line, the battery positive line 101 and the battery negative line 102 pass through the first magnetic ring 5.

[0038] It also includes: a first capacitor filter combination 6 and a second capacitor filter combination 7, the first section 411 of the boost line includes a first section 4111 of the boost line between the fast charging port 4 and the first magnetic ring 5 and a first section 4112 of the boost line between the first magnetic ring 5 and the boost charging capacitor 2, the battery positive line 101 includes a first section 1011 of the battery positive line between the battery 1 and the first magnetic ring 5 and a second section 1012 of the battery positive line between the first magnetic ring 5 and the electric drive device 3, the battery negative line 102 includes a first section 1021 of the battery negative line between the battery 1 and the first magnetic ring 5 and a second section 1022 of the battery negative line between the first magnetic ring 5 and the electric drive device 3;

[0039] The first capacitor filter combination 6 is electrically connected to the front portion 4111 of the first section of the boost line, the first section 1011 of the battery positive line, and the first section 1021 of the battery negative line, and the second capacitor filter combination 7 is electrically connected to the rear portion 4112 of the first section of the boost line, the second section 1012 of the battery positive line, and the second section 1022 of the battery negative line;

[0040] The first capacitor filter combination 6 includes: a first combination first capacitor 61, a first combination second capacitor 62, a first combination third capacitor 63 and a first combination fourth capacitor 64, and the second capacitor filter combination 7 includes a second combination first capacitor 71, a second combination second capacitor 72, a second combination third capacitor 73 and a second combination fourth capacitor 74, wherein:

[0041] The first combination first capacitor 61 is electrically connected to the first section 1011 of the battery positive line and the first section 1021 of the battery negative line respectively; one end of the first combination second capacitor 62 is electrically connected to the front part 4111 of the first section of the boost line, and the other end is electrically connected to one end of the first combination third capacitor 63; the other end of the first combination third capacitor 63 is electrically connected to the first section 1021 of the battery negative line; one end of the first combination fourth capacitor 64 is electrically connected to the front part 4111 of the first section of the boost line, and the other end is electrically connected to the first section 1021 of the battery negative line; the connection point between the first combination second capacitor 62 and the first combination third capacitor 63 is electrically connected to the battery housing;

[0042] One end of the second combination second capacitor 72 is electrically connected to the second segment 1012 of the battery positive line, and the other end is electrically connected to one end of the second combination third capacitor 73, the other end of the second combination third capacitor 73 is electrically connected to the second segment 1022 of the battery negative line, one end of the second combination first capacitor 71 is electrically connected to the rear part 4112 of the first segment of the boost line, and the other end is electrically connected to the connection point of the second combination second capacitor 72 and the second combination third capacitor 73, the second combination fourth capacitor 74 is electrically connected to the second segment 1012 of the battery positive line and the second segment 1022 of the battery negative line, respectively, and the connection point of the second combination second capacitor 72 and the second combination third capacitor 73 is electrically connected to the battery housing;

[0043] The first combination first capacitor 61, the first combination fourth capacitor 64 and the second combination fourth capacitor 74 are X capacitors, and the first combination second capacitor 62, the first combination third capacitor 63, the second combination first capacitor 71, the second combination second capacitor 72 and the second combination third capacitor 73 are Y capacitors;

[0044] It also includes: a second magnetic ring 8 located in the electric drive device 3, through which the second section 412 of the boost line, the positive battery line 101 and the negative battery line 102 pass;

[0045] It also includes a third capacitor filter combination 9 and a fourth capacitor filter combination 10, the second section 412 of the boost line includes a front part 4121 of the second section of the boost line located between the boost charging capacitor 2 and the second magnetic ring 8 and a rear part 4122 of the second section of the boost line located between the second magnetic ring 8 and the motor 32, the positive battery line 101 includes a second section 1012 of the positive battery line located between the first magnetic ring 5 and the second magnetic ring 8 and a third section 1013 of the positive battery line located between the second magnetic ring 8 and the electric drive device 3, and the negative battery line 102 includes a second section 1022 of the negative battery line located between the first magnetic ring 5 and the second magnetic ring 8 and a third section 1023 of the negative battery line located between the second magnetic ring 8 and the electric drive device 3;

[0046] The third capacitor filter combination 9 is electrically connected to the front portion 4121 of the second section of the boost line, the second section 1012 of the battery positive line, and the second section 1022 of the battery negative line. The fourth capacitor filter combination 10 is electrically connected to the rear portion 4122 of the second section of the boost line, the third section 1013 of the battery positive line, and the third section 1023 of the battery negative line.

[0047] The third capacitor filter combination 9 includes: a third combination first capacitor 91, a third combination second capacitor 92 and a third combination third capacitor 93, and the fourth capacitor filter combination 10 includes a fourth combination first capacitor 1001, a fourth combination second capacitor 1002 and a fourth combination third capacitor 1003, wherein:

[0048] The third combination first capacitor 91 is electrically connected to the second segment 1012 of the battery positive line and the second segment 1022 of the battery negative line respectively, one end of the third combination second capacitor 92 is electrically connected to the front part 4121 of the second segment of the boost line, and the other end is electrically connected to one end of the third combination third capacitor 93, the other end of the third combination third capacitor 93 is electrically connected to the second segment 1022 of the battery negative line, and the connection point between the third combination second capacitor 92 and the third combination third capacitor 93 is electrically connected to the battery housing;

[0049] The first capacitor 1001 of the fourth combination is electrically connected to the third segment 1013 of the battery positive line and the third segment 1023 of the battery negative line respectively, one end of the second capacitor 1002 of the fourth combination is electrically connected to the third segment 1013 of the battery positive line, and the other end is electrically connected to one end of the third capacitor 1003 of the fourth combination, the other end of the third capacitor 1003 of the fourth combination is electrically connected to the third segment 1023 of the battery negative line, and the connection point between the second capacitor 1002 of the fourth combination and the third capacitor 1003 of the fourth combination is electrically connected to the battery housing;

[0050] The third combination first capacitor 91 and the fourth combination first capacitor 1001 are X capacitors, and the third combination second capacitor 92, the third combination third capacitor 93, the fourth combination second capacitor 1002, and the fourth combination third capacitor 1003 are Y capacitors;

[0051] It also includes a fourth magnetic ring 12 located at the fast charging port 4, the fast charging positive terminal 401 of the fast charging port 4 is electrically connected to the first section 411 of the boost line, the fast charging negative terminal 402 of the fast charging port 4 is electrically connected to the battery negative line 102 through the fast charging negative line 42, and the first section 411 of the boost line and the fast charging negative line 42 pass through the fourth magnetic ring 12.

[0052] Specifically, the vehicle boost charging device of this embodiment includes three high-voltage components: a battery device 21, a boost device 22, and an electric drive device 3. The three components are connected in series, wherein the boost charging line 41, the battery positive line 101, and the battery negative line 102 connect the three components in series.

[0053] The battery device 21 includes at least a battery 1. In some embodiments, the battery device 21 also includes a pre-charge resistor 16, a pre-charge relay 17, a fast charge relay 18, a main positive relay 19, and a main negative relay 20. The battery 1, the pre-charge resistor 16, the pre-charge relay 17, the fast charge relay 18, the main positive relay 19, and the main negative relay 20 together constitute the battery device 21. Among them, the positive electrode of the battery 1 is electrically connected to the battery positive line 101 through the main positive relay 19, and the negative electrode of the battery 1 is electrically connected to the battery negative line 102 through the main negative relay 20. The positive terminal of the battery 1 is also electrically connected to the boost charging line 41 through the pre-charge resistor 16, the pre-charge relay 17, and the fast charge relay 18.

[0054] The fast charging port 4 includes a fast charging positive terminal 401 and a fast charging negative terminal 402. The fast charging positive terminal 401 of the fast charging port 4 is electrically connected to the first section 411 of the boost line 41 of the boost charging line, and the fast charging negative terminal 402 of the fast charging port 4 is electrically connected to the battery negative line 102 through the fast charging negative line 42. A fourth magnetic ring 12 is added between the fast charging positive terminal 401 and the fast charging negative terminal 402 of the fast charging port 4, and the first section 411 of the boost line and the fast charging negative line 42 pass through the fourth magnetic ring 12. In the whole vehicle, the fast charging harness is generally an unshielded harness. The fast charging harness is the position on the whole vehicle where it is easiest to form an antenna to radiate noise. In this embodiment, a magnetic ring is placed at this position to prevent noise from radiating from the fast charging line.

[0055] The boost device 22 at least includes a boost charging capacitor 2, one end of which is electrically connected to the boost charging line 41, and the other end is connected to the battery negative line 102, and boost charging is achieved through the boost charging capacitor 2. The boost charging capacitor 2 divides the boost charging line 41 into a first boost line section 411 and a second boost line section 412, the first boost line section 411 is located between the fast charging positive terminal 401 of the fast charging port 4 and the boost charging capacitor 2, and the second boost line section 412 is located between the boost charging capacitor 2 and the electric drive device 3.

[0056] In some embodiments, the boost device 22 further includes a boost charging control relay 14 located at the first section 411 of the boost line and a boost charging capacitor control relay 15 located at the second section 412 of the boost line. The boost charging control relay 14, the boost charging capacitor 2, and the boost charging capacitor control relay 15 constitute a boost charging function. The boost charging control relay 14 and the boost charging capacitor control relay 15 control the boost device 22 to be turned on or off, thereby controlling the boost charging function to be turned on or off.

[0057] The electric drive device 3 includes a motor controller 31 and a motor 32 which are electrically connected.

[0058] In some embodiments, the motor controller 31 includes a first switch tube 311, a second switch tube 312, a third switch tube 313, a fourth switch tube 314, a fifth switch tube 315, and a sixth switch tube 316 that are electrically connected. The motor 32 includes a plurality of inductors. The motor controller 31 is electrically connected to the motor 32, and the boost charging line 41 is electrically connected to the connection point between the motor controller 31 and the motor 32.

[0059] In some embodiments, the electric drive device 3 further includes a DCU bus capacitor 13 electrically connected to the battery positive line 101 and the battery negative line 102 respectively.

[0060] In order to prevent the magnetic ring from losing its noise suppression function due to saturation in the boost charging condition, while taking into account the conduction of the boost charging line noise in the driving condition, the second magnetic ring 8 is added to the electric drive device 3 in this embodiment. The second magnetic ring 8 is a three-hole magnetic ring, which clamps the boost charging line 41, the battery positive line 101, and the battery negative line 102 together. In this way, whether in the boost charging condition or the driving condition, the sum of the currents on the three lines is always zero, and the magnetic ring will never be saturated, which effectively suppresses noise.

[0061] At the same time, a third capacitor filter combination 9 and a fourth capacitor filter combination 10 are respectively placed before and after the second magnetic ring 8. The two capacitor filter combinations are composed of X and Y capacitors. The third capacitor filter combination 9, the second magnetic ring 8 and the fourth capacitor filter combination 10 form an electric drive high-voltage filter network.

[0062] The second magnetic ring 8 divides the second section 412 of the boost line into a front section 4121 of the second section of the boost line located between the boost charging capacitor 2 and the second magnetic ring 8 and a rear section 4122 of the second section of the boost line located between the second magnetic ring 8 and the motor 32; the second magnetic ring 8 divides the positive battery line 101 into a second section 1012 of the positive battery line located between the first magnetic ring 5 and the second magnetic ring 8 and a third section 1013 of the positive battery line located between the second magnetic ring 8 and the electric drive device 3; the second magnetic ring 8 divides the negative battery line 102 into a second section 1022 of the negative battery line located between the first magnetic ring 5 and the second magnetic ring 8 and a third section 1023 of the negative battery line located between the second magnetic ring 8 and the electric drive device 3;

[0063] The third capacitor filter combination 9 is electrically connected to the front portion 4121 of the second section of the boost line, the second section 1012 of the battery positive line, and the second section 1022 of the battery negative line. The fourth capacitor filter combination 10 is electrically connected to the rear portion 4122 of the second section of the boost line, the third section 1013 of the battery positive line, and the third section 1023 of the battery negative line.

[0064] The third capacitor filter combination 9 includes: a third combination first capacitor 91, a third combination second capacitor 92 and a third combination third capacitor 93, and the fourth capacitor filter combination 10 includes a fourth combination first capacitor 1001, a fourth combination second capacitor 1002 and a fourth combination third capacitor 1003, wherein:

[0065] The third combination first capacitor 91 is electrically connected to the second segment 1012 of the battery positive line and the second segment 1022 of the battery negative line respectively, one end of the third combination second capacitor 92 is electrically connected to the front part 4121 of the second segment of the boost line, and the other end is electrically connected to one end of the third combination third capacitor 93, the other end of the third combination third capacitor 93 is electrically connected to the second segment 1022 of the battery negative line, and the connection point between the third combination second capacitor 92 and the third combination third capacitor 93 is electrically connected to the battery housing;

[0066] The first capacitor 1001 of the fourth combination is electrically connected to the third segment 1013 of the battery positive line and the third segment 1023 of the battery negative line respectively, one end of the second capacitor 1002 of the fourth combination is electrically connected to the third segment 1013 of the battery positive line, and the other end is electrically connected to one end of the third capacitor 1003 of the fourth combination, the other end of the third capacitor 1003 of the fourth combination is electrically connected to the third segment 1023 of the battery negative line, and the connection point between the second capacitor 1002 of the fourth combination and the third capacitor 1003 of the fourth combination is electrically connected to the battery housing;

[0067] The third combination first capacitor 91 and the fourth combination first capacitor 1001 are X capacitors, and the third combination second capacitor 92, the third combination third capacitor 93, the fourth combination second capacitor 1002, and the fourth combination third capacitor 1003 are Y capacitors.

[0068] In this embodiment, the third capacitor filter combination and the fourth capacitor filter combination provided inside the electric drive form a CLC (capacitor-inductor-capacitor) high-voltage filter network with the second magnetic ring, which effectively suppresses the electromagnetic noise generated by the electric drive, allows the noise current to circulate inside the electric drive, minimizes interference with external components, and optimizes the EMC of the entire vehicle.

[0069] In addition, a first capacitor filter combination 6 and a second capacitor filter combination 7 are added to the boost device 22, which are respectively located before and after the first magnetic ring 5. The first capacitor filter combination 6, the first magnetic ring 5 and the second capacitor filter combination 7 form an electric drive boost filter network. The first magnetic ring 5 clamps the three wires of the boost charging line 41, the battery positive line 101 and the battery negative line 102 together to ensure that the magnetic ring will not be saturated regardless of the boost charging condition or the driving condition, thereby effectively suppressing noise. At the same time, the first capacitor filter combination 6 and the second capacitor filter combination 7 are respectively placed before and after the first magnetic ring 5, and these two capacitor filter combinations are composed of X and Y capacitors.

[0070] The first magnetic ring 5 divides the first section 411 of the boost line into a front section 4111 of the boost line located between the fast charging port 4 and the first magnetic ring 5 and a rear section 4112 of the boost line located between the first magnetic ring 5 and the boost charging capacitor 2. The first magnetic ring 5 divides the battery positive line 101 into a first section 1011 of the battery positive line located between the battery 1 and the first magnetic ring 5 and a second section 1012 of the battery positive line located between the first magnetic ring 5 and the electric drive device 3. The first magnetic ring 5 divides the battery negative line 102 into a first section 1021 of the battery negative line located between the battery 1 and the first magnetic ring 5 and a second section 1022 of the battery negative line located between the first magnetic ring 5 and the electric drive device 3.

[0071] The first capacitor filter combination 6 is electrically connected to the front portion 4111 of the first section of the boost line, the first section 1011 of the battery positive line, and the first section 1021 of the battery negative line, and the second capacitor filter combination 7 is electrically connected to the rear portion 4112 of the first section of the boost line, the second section 1012 of the battery positive line, and the second section 1022 of the battery negative line;

[0072] The first capacitor filter combination 6 includes: a first combination first capacitor 61, a first combination second capacitor 62, a first combination third capacitor 63 and a first combination fourth capacitor 64, and the second capacitor filter combination 7 includes a second combination first capacitor 71, a second combination second capacitor 72, a second combination third capacitor 73 and a second combination fourth capacitor 74, wherein:

[0073] The first combination first capacitor 61 is electrically connected to the first section 1011 of the battery positive line and the first section 1021 of the battery negative line respectively; one end of the first combination second capacitor 62 is electrically connected to the front part 4111 of the first section of the boost line, and the other end is electrically connected to one end of the first combination third capacitor 63; the other end of the first combination third capacitor 63 is electrically connected to the first section 1021 of the battery negative line; one end of the first combination fourth capacitor 64 is electrically connected to the front part 4111 of the first section of the boost line, and the other end is electrically connected to the first section 1021 of the battery negative line; the connection point between the first combination second capacitor 62 and the first combination third capacitor 63 is electrically connected to the battery housing;

[0074] One end of the second combination second capacitor 72 is electrically connected to the second segment 1012 of the battery positive line, and the other end is electrically connected to one end of the second combination third capacitor 73, the other end of the second combination third capacitor 73 is electrically connected to the second segment 1022 of the battery negative line, one end of the second combination first capacitor 71 is electrically connected to the rear part 4112 of the first segment of the boost line, and the other end is electrically connected to the connection point of the second combination second capacitor 72 and the second combination third capacitor 73, the second combination fourth capacitor 74 is electrically connected to the second segment 1012 of the battery positive line and the second segment 1022 of the battery negative line, respectively, and the connection point of the second combination second capacitor 72 and the second combination third capacitor 73 is electrically connected to the battery housing;

[0075] The first combination first capacitor 61, the first combination fourth capacitor 64 and the second combination fourth capacitor 74 are X capacitors, and the first combination second capacitor 62, the first combination third capacitor 63, the second combination first capacitor 71, the second combination second capacitor 72 and the second combination third capacitor 73 are Y capacitors;

[0076] Different from the capacitor filter combination in the electric drive, the capacitor filter combination of the boost device 22 adds a Y capacitor to the housing and an X capacitor to the high voltage negative electrode of the boost charging line. At the same time, the X and Y capacitors of the boost charging line 41 are arranged at the front end of the boost charging capacitor relay, and are not directly connected to the power components of the motor controller 31, so as to avoid affecting the operation of the motor controller 31.

[0077] Among them, although the battery positive line 101 and the battery negative line 102 are connected to the same network in the three components, when arranging the wiring harness, ensure the connection sequence with the connected filter combination, from the electric drive device 3 to the battery device 21, it is required to pass through the fourth capacitor filter combination 10, the second magnetic ring 8, the third capacitor filter combination 9, the second capacitor filter combination 7, the first magnetic ring 5, the first capacitor filter combination 6 and then to the battery device 21 in sequence, and no branch lines can be produced on the chain.

[0078] In this embodiment, a first capacitor filter combination and a second capacitor filter combination are arranged inside the boost device, and a CLC high-voltage filter network is formed with the first magnetic ring to suppress the noise transmitted from the electric drive along the boost line under driving conditions. Under boost conditions, the noise circulating between the electric drive and the boost device is blocked to prevent the noise from being transmitted to the battery and the fast charging port, thereby optimizing the EMC of the whole vehicle.

[0079] In this embodiment, the relative positions of the magnetic rings and capacitor filter combinations shown in the figure cannot be changed, and the number and specifications of the internal magnetic rings and filter capacitors can be increased or decreased according to different application scenarios. The battery and the boost device are connected through the boost filter network.

[0080] This embodiment suppresses the differential and common-mode noise of the boost line by adding a magnetic ring and an electromagnetic filter combination to the boost device. In addition, the X and Y capacitors for the charging boost line are arranged at the front end of the boost charging capacitor relay, and are not directly connected to the power components of the motor controller 31 to avoid affecting the operation of the motor controller 31. In the electric drive device, a magnetic ring and an electromagnetic filter combination are added to suppress noise. The first magnetic ring and the second magnetic ring are both three-hole magnetic rings to avoid magnetic ring saturation, which effectively suppresses noise. Finally, a third magnetic ring is added to the fast charging port to prevent noise from radiating from the fast charging line. This embodiment fully utilizes the performance of the filter by optimizing the design and position of the magnetic ring and capacitor filter, and optimizing the high-voltage connection between the vehicle battery, the boost device, and the electric drive, and uses the least devices while meeting the requirements.

[0081] like Figure 2 The boost device can be placed between the battery device 21 and the electric drive device 3 as an independent component, or it can be integrated into the battery device 21 or the electric drive device 3.

[0082] like Figure 3 The figure shows a device principle diagram of a vehicle boost charging device according to another embodiment of the present invention, wherein the components of the boost device are integrated into the battery device 21, and the filter topology and relative position thereof do not change.

[0083] like Figure 4 As shown, components of the boost device can also be integrated into the electric drive 3 .

[0084] like Figure 4As shown, another embodiment of the present invention is a vehicle boost charging device, comprising: a battery 1, a boost charging capacitor 2, an electric drive device 3, a fast charging port 4, a boost charging line 41 and a first magnetic ring 5, the electric drive device 3 comprises an electrically connected motor controller 31 and a motor 32, the positive electrode of the battery 1 is electrically connected to the motor controller 31 through the battery positive line 101, the negative electrode of the battery 1 is electrically connected to the motor controller 31 through the battery negative line 102, the fast charging port 4 is electrically connected to the connection point of the motor controller 31 and the motor 32 through the boost charging line 41 The boost charging line 41 includes a first section 411 and a second section 412 of the boost charging line. One end of the boost charging capacitor 2 is electrically connected to the fast charging port 4 through the first section 411 of the boost charging line, and is electrically connected to the motor 32 through the second section 412 of the boost charging line. The other end of the boost charging capacitor 2 is electrically connected to the battery negative line 102. The first magnetic ring 5 is located between the fast charging port 4 and the boost charging capacitor 2, and the first section 411 of the boost charging line, the battery positive line 101 and the battery negative line 102 pass through the first magnetic ring 5.

[0085] It also includes: a first capacitor filter combination 6 and a second capacitor filter combination 7, the first section 411 of the boost line includes a first section 4111 of the boost line between the fast charging port 4 and the first magnetic ring 5 and a first section 4112 of the boost line between the first magnetic ring 5 and the boost charging capacitor 2, the battery positive line 101 includes a first section 1011 of the battery positive line between the battery 1 and the first magnetic ring 5 and a second section 1012 of the battery positive line between the first magnetic ring 5 and the electric drive device 3, the battery negative line 102 includes a first section 1021 of the battery negative line between the battery 1 and the first magnetic ring 5 and a second section 1022 of the battery negative line between the first magnetic ring 5 and the electric drive device 3;

[0086] The first capacitor filter combination 6 is electrically connected to the front portion 4111 of the first section of the boost line, the first section 1011 of the battery positive line, and the first section 1021 of the battery negative line, and the second capacitor filter combination 7 is electrically connected to the rear portion 4112 of the first section of the boost line, the second section 1012 of the battery positive line, and the second section 1022 of the battery negative line;

[0087] The first capacitor filter combination 6 includes: a first combination first capacitor 61, a first combination second capacitor 62, a first combination third capacitor 63 and a first combination fourth capacitor 64, and the second capacitor filter combination 7 includes a second combination first capacitor 71, a second combination second capacitor 72, a second combination third capacitor 73 and a second combination fourth capacitor 74, wherein:

[0088] The first combination first capacitor 61 is electrically connected to the first section 1011 of the battery positive line and the first section 1021 of the battery negative line respectively; one end of the first combination second capacitor 62 is electrically connected to the front part 4111 of the first section of the boost line, and the other end is electrically connected to one end of the first combination third capacitor 63; the other end of the first combination third capacitor 63 is electrically connected to the first section 1021 of the battery negative line; one end of the first combination fourth capacitor 64 is electrically connected to the front part 4111 of the first section of the boost line, and the other end is electrically connected to the first section 1021 of the battery negative line; the connection point between the first combination second capacitor 62 and the first combination third capacitor 63 is electrically connected to the battery housing;

[0089] One end of the second combination second capacitor 72 is electrically connected to the second segment 1012 of the battery positive line, and the other end is electrically connected to one end of the second combination third capacitor 73, the other end of the second combination third capacitor 73 is electrically connected to the second segment 1022 of the battery negative line, one end of the second combination first capacitor 71 is electrically connected to the rear part 4112 of the first segment of the boost line, and the other end is electrically connected to the connection point of the second combination second capacitor 72 and the second combination third capacitor 73, the second combination fourth capacitor 74 is electrically connected to the second segment 1012 of the battery positive line and the second segment 1022 of the battery negative line, respectively, and the connection point of the second combination second capacitor 72 and the second combination third capacitor 73 is electrically connected to the battery housing;

[0090] The first combination first capacitor 61, the first combination fourth capacitor 64 and the second combination fourth capacitor 74 are X capacitors, and the first combination second capacitor 62, the first combination third capacitor 63, the second combination first capacitor 71, the second combination second capacitor 72 and the second combination third capacitor 73 are Y capacitors;

[0091] It also includes a fourth magnetic ring 12 located at the fast charging port 4, the fast charging positive terminal 401 of the fast charging port 4 is electrically connected to the first section 411 of the boost line, the fast charging negative terminal 402 of the fast charging port 4 is electrically connected to the battery negative line 102 through the fast charging negative line 42, and the first section 411 of the boost line and the fast charging negative line 42 pass through the fourth magnetic ring 12;

[0092] The boost charging capacitor 2, the first magnetic ring 5, the first capacitor filter combination 6 and the second capacitor filter combination 7 are integrated in the electric drive device 3, and the vehicle boost charging device also includes: a third magnetic ring 11 located between the fast charging port 4 and the first capacitor filter combination 6, and the first section 411 of the boost line, the battery positive line 101 and the battery negative line 102 pass through the third magnetic ring 11.

[0093] Specifically, since the boost device is integrated with the electric drive device, the noise can complete the path return inside the electric drive, so the filtering topology can be simplified, and the high-voltage filtering network composed of the third capacitor filter combination 9, the second magnetic ring 8 and the fourth capacitor filter combination 10 originally placed in the electric drive is deleted, and the original boost device filter device is integrated into the electric drive device 3. And the third magnetic ring 11 can be optionally added to the port of the electric drive device 3 to further prevent the noise of the high-voltage port from being transmitted outward.

[0094] In some embodiments, the battery device 21 also includes a pre-charging resistor 16, a pre-charging relay 17, a fast charging relay 18, a main positive relay 19, and a main negative relay 20. The battery 1, the pre-charging resistor 16, the pre-charging relay 17, the fast charging relay 18, the main positive relay 19, and the main negative relay 20 together constitute the battery device 21.

[0095] In some embodiments, the boost charging control relay 14 and the boost charging capacitor control relay 15 are also integrated into the electric drive device 3 .

[0096] This embodiment integrates the boost device into the electric drive device, deletes the original high-voltage filter network, and saves space and cost. This embodiment optimizes the design and position of the magnetic ring and capacitor filter, optimizes the high-voltage connection between the vehicle battery, the boost device, and the electric drive, and fully utilizes the performance of the filter, using the least number of devices while meeting the requirements.

[0097] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A vehicle boost charging device, characterized in that: include: A battery (1), a boost charging capacitor (2), an electric drive device (3), a fast charging port (4), a boost charging line (41), and a first magnetic ring (5), wherein the electric drive device (3) comprises an electrically connected motor controller (31) and a motor (32), wherein the positive electrode of the battery (1) is electrically connected to the motor controller (31) via a battery positive line (101), the negative electrode of the battery (1) is electrically connected to the motor controller (31) via a battery negative line (102), the fast charging port (4) is electrically connected to a connection point between the motor controller (31) and the motor (32) via the boost charging line (41), and the boost charging line (41) is electrically connected to a connection point between the motor controller (31) and the motor (32). 1) comprising a first section (411) of a boost line and a second section (412) of a boost line, one end of the boost charging capacitor (2) being electrically connected to the fast charging port (4) through the first section (411) of the boost line, and being electrically connected to the motor (32) through the second section (412) of the boost line, the other end of the boost charging capacitor (2) being electrically connected to the negative electrode line (102) of the battery, the first magnetic ring (5) being located between the fast charging port (4) and the boost charging capacitor (2), and the first section (411) of the boost line, the positive electrode line (101) of the battery, and the negative electrode line (102) of the battery passing through the first magnetic ring (5); The device further comprises: a first capacitor filter combination (6) and a second capacitor filter combination (7); the first section (411) of the boost line comprises a first section (4111) of the boost line located between the fast charging port (4) and the first magnetic ring (5) and a first section (4112) of the boost line located between the first magnetic ring (5) and the boost charging capacitor (2); the battery positive line (101) comprises a first section (1011) of the battery positive line located between the battery (1) and the first magnetic ring (5) and a second section (1012) of the battery positive line located between the first magnetic ring (5) and the electric drive device (3); the battery negative line (102) comprises a first section (1021) of the battery negative line located between the battery (1) and the first magnetic ring (5) and a second section (1022) of the battery negative line located between the first magnetic ring (5) and the electric drive device (3); The first capacitor filter combination (6) is electrically connected to the front portion (4111) of the first section of the boost line, the first section (1011) of the battery positive line, and the first section (1021) of the battery negative line; the second capacitor filter combination (7) is electrically connected to the rear portion (4112) of the first section of the boost line, the second section (1012) of the battery positive line, and the second section (1022) of the battery negative line; The first capacitor filter combination (6) comprises: a first combination first capacitor (61), a first combination second capacitor (62), a first combination third capacitor (63) and a first combination fourth capacitor (64); the second capacitor filter combination (7) comprises a second combination first capacitor (71), a second combination second capacitor (72), a second combination third capacitor (73) and a second combination fourth capacitor (74), wherein: The first combination first capacitor (61) is electrically connected to the first section (1011) of the battery positive line and the first section (1021) of the battery negative line respectively; one end of the first combination second capacitor (62) is electrically connected to the front part (4111) of the first section of the boost line, and the other end is electrically connected to one end of the first combination third capacitor (63); the other end of the first combination third capacitor (63) is electrically connected to the first section (1021) of the battery negative line; one end of the first combination fourth capacitor (64) is electrically connected to the front part (4111) of the first section of the boost line, and the other end is electrically connected to the first section (1021) of the battery negative line; the connection point between the first combination second capacitor (62) and the first combination third capacitor (63) is electrically connected to the battery housing; One end of the second combination second capacitor (72) is electrically connected to the second section (1012) of the battery positive electrode line, and the other end is electrically connected to one end of the second combination third capacitor (73); the other end of the second combination third capacitor (73) is electrically connected to the second section (1022) of the battery negative electrode line; one end of the second combination first capacitor (71) is electrically connected to the rear part (4112) of the first section of the boost line, and the other end is electrically connected to the connection point of the second combination second capacitor (72) and the second combination third capacitor (73); the second combination fourth capacitor (74) is electrically connected to the second section (1012) of the battery positive electrode line and the second section (1022) of the battery negative electrode line, respectively; the connection point of the second combination second capacitor (72) and the second combination third capacitor (73) is electrically connected to the battery housing; The boost charging capacitor (2), the first magnetic ring (5), the first capacitor filter combination (6) and the second capacitor filter combination (7) are integrated in the electric drive device (3), and the vehicle boost charging device further comprises: a third magnetic ring (11) located between the fast charging port (4) and the first capacitor filter combination (6), and the first section (411) of the boost line, the positive battery line (101) and the negative battery line (102) pass through the third magnetic ring (11).

2. The vehicle boost charging device according to claim 1, characterized in that: The first combination first capacitor (61), the first combination fourth capacitor (64) and the second combination fourth capacitor (74) are X capacitors, and the first combination second capacitor (62), the first combination third capacitor (63), the second combination first capacitor (71), the second combination second capacitor (72) and the second combination third capacitor (73) are Y capacitors.

3. The vehicle boost charging device according to any one of claims 1 to 2, characterized in that: The invention also includes a fourth magnetic ring (12) located at the fast charging port (4); the fast charging positive terminal (401) of the fast charging port (4) is electrically connected to the first section (411) of the boost line; the fast charging negative terminal (402) of the fast charging port (4) is electrically connected to the battery negative line (102) via the fast charging negative line (42); and the first section (411) of the boost line and the fast charging negative line (42) pass through the fourth magnetic ring (12).

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