Power supply devices, capacitor / power supply device assemblies, and vehicles

Abstract

Power supply devices, capacitors, power supply device assemblies, and vehicles. The power supply device includes a power supply device body, a first electrical connector, and a second electrical connector, the first electrical connector including a first electrical connection end extending from the power supply device body in a first direction, the second electrical connector including a second electrical connection end extending from the power supply device body, the direction of current passing through the first electrical connector being set to be opposite to the direction of current passing through the second electrical connector, the first and second electrical connection ends being stacked in a second direction, the second direction being perpendicular to the first direction.

Description

Technical Field

[0001] Cross - reference to Related Applications This disclosure claims the priority of Chinese Patent Application No. 202310242356.5, titled "POWER MODULE, CAPACITOR AND POWER MODULE ASSEMBLY AND VEHICLE", filed with the National Intellectual Property Administration on March 3, 2023, which is incorporated herein by reference in its entirety.

[0002] This disclosure relates to the technical field of vehicles, and more particularly, to a power device, a capacitor - power device assembly, and a vehicle.

Background Art

[0003] In the three - core system of new energy vehicles, the controller is one of the most critical components, and the support capacitor and power device are the most important components in the controller. The support capacitor (also called DC - link capacitor) mainly provides protection for the module (such as absorbing ripple) to prevent the module from failing due to high voltage. The power device converts the power output to provide a three - phase power input for the motor.

[0004] In the prior art, after the support capacitor and the power device are electrically connected, the stray inductance is often high, and the high stray inductance may cause problems such as circuit system loss or signal attenuation.

Summary of the Invention

[0005] The objective of this disclosure is to provide a power device, a capacitor - power device assembly, and a vehicle, where the power device can reduce the stray inductance and improve the stability and anti - interference ability of the power device.

[0006] To achieve the above objective, the first aspect of this disclosure is Power supply unit and A first electrical connector including a first electrical connection end extending in a first direction from the power device body, A second electrical connector including a second electrical connection end extending from the power supply device body, A power supply device including, The present invention provides a power supply device in which the direction of current passing through the first electrical connector is set to be opposite to the direction of current passing through the second electrical connector, the first and second electrical connection ends are stacked in the second direction, and the second direction is perpendicular to the first direction.

[0007] According to one embodiment of the present disclosure, the projection of the first electrical connection end in the second direction completely covers the projection of the second electrical connection end in the second direction, or The projection of the second electrical connection end in the second direction completely covers the projection of the first electrical connection end in the second direction.

[0008] According to one embodiment of the present disclosure, the distance between the first electrical connection end and the second electrical connection end in the second direction is 1 mm or less.

[0009] According to one embodiment of the present disclosure, the width of the first electrical connection end in the third direction is equal to the width of the second electrical connection end in the third direction, and the first and second directions are perpendicular to the third direction.

[0010] According to one embodiment of the present disclosure, the length of the first electrical connection end in the first direction is greater than the length of the second electrical connection end in the first direction, or The length of the second electrical connection end in the first direction is greater than the length of the first electrical connection end in the first direction.

[0011] According to one embodiment of the present disclosure, the power supply device further includes a first insulating sheet, at least a portion of which is positioned between a first electrical connection end and a second electrical connection end, and a projection of at least one of the first and second electrical connection ends in a second direction is positioned entirely within a projection of the first insulating sheet in the second direction.

[0012] A second aspect of the present disclosure provides a capacitor-power device assembly, comprising a capacitor and a power device, wherein a first electrical connection end and a second electrical connection end of the power device are connected to the capacitor.

[0013] According to one embodiment of the present disclosure, the capacitor includes a capacitor body, a third electrical connector, and a fourth electrical connector, wherein the third electrical connector includes a third electrical connection end extending from the capacitor body in a first direction, and the fourth electrical connector includes a fourth electrical connection end extending from the capacitor body. The direction of the current passing through the third electrical connector is set to be opposite to the direction of the current passing through the fourth electrical connector, and the third and fourth electrical connection ends are stacked in the second direction. The third electrical connection end is connected to the first electrical connection end, and the fourth electrical connection end is connected to the second electrical connection end.

[0014] According to one embodiment of the present disclosure, a gap exists between the end of a third electrical connection end far from the capacitor body and the end of a first electrical connection end far from the power supply device body, a first welding area is formed at the connection position between the fourth electrical connection end and the second electrical connection end, and at least a portion of the first welding area is exposed through the gap. The capacitor-power device assembly further includes an intermediate connector, and the third electrical connection end and the first electrical connection end are connected by the intermediate connector.

[0015] According to one embodiment of the present disclosure, an intermediate connector is positioned across the gap, with one end of the intermediate connector connected to a third electrical connection end and the other end of the intermediate connector connected to a first electrical connection end.

[0016] According to one embodiment of the present disclosure, the intermediate connector includes a body portion, a first overlapping portion located on one side of the body portion, and a second overlapping portion located on the other side of the body portion, wherein the first overlapping portion is superimposed on a third electrical connection end, and the second overlapping portion is superimposed on the first electrical connection end.

[0017] According to one embodiment of the present disclosure, a first arrangement portion and a second arrangement portion are arranged on a main body portion, the first arrangement portion is configured to be aligned with the end face of the end of a third electrical connection end that is farther from the capacitor body, and the second arrangement portion is configured to be aligned with the end face of the end of the first electrical connection end that is farther from the power supply device body.

[0018] According to one embodiment of the present disclosure, the main body portion is formed as a U-shaped structure having an opening facing a gap, the first arrangement portion is the first inner side wall or first outer side wall of the U-shaped structure near the first overlapping portion, and the second arrangement portion is the second inner side wall or second outer side wall of the U-shaped structure near the second overlapping portion.

[0019] According to one embodiment of the present disclosure, the first overlapping portion is welded to the third electrical connection end by fusion welding, and the second welding area is located between the first overlapping portion and the third electrical connection end, and the second overlapping portion is welded to the first electrical connection end by fusion welding, and the third welding area is located between the second overlapping portion and the first electrical connection end, The distance between the edge of the second welding area, which is closer to the main body, and the first placement area is 1 mm to 4 mm, and the distance between the edge of the third welding area, which is closer to the main body, and the second placement area is 1 mm to 4 mm.

[0020] According to an embodiment of the present disclosure, a first mounting region exists between a first overlapping portion and a third electrical connection end portion, and a second mounting region exists between a second overlapping portion and a first electrical connection end portion. The first overlapping portion is welded to the third electrical connection end portion by a welding process, a second welding region exists between the first overlapping portion and the third electrical connection end portion, the second overlapping portion is welded to the first electrical connection end portion by a welding process, and a third welding region exists between the second overlapping portion and the first electrical connection end portion. The width of the first mounting region is larger than the width of the second welding region, and the width of the second mounting region is larger than the width of the third welding region.

[0021] According to an embodiment of the present disclosure, both the width of the first mounting region and the width of the second mounting region are from 4 mm to 10 mm, both the width of the second welding region and the width of the third welding region are from 0.5 mm to 2 mm, or The ratio of the width of the second welding region to the width of the first mounting region is less than 0.8, and the ratio of the width of the third welding region to the width of the second mounting region is less than 0.8.

[0022] According to an embodiment of the present disclosure, the power device further includes a first insulating sheet, at least a part of the first insulating sheet is disposed between the first electrical connection end portion and the second electrical connection end portion, the capacitor further includes a second insulating sheet, and at least a part of the second insulating sheet is disposed between the third electrical connection end portion and the fourth electrical connection end portion. A part of the first insulating sheet and a part of the second insulating sheet are stacked in the second direction.

[0023] According to an embodiment of the present disclosure, a part of the first insulating sheet is disposed between the third electrical connection end portion and the fourth electrical connection end portion, and / or A part of the second insulating sheet is disposed between the first electrical connection end portion and the second electrical connection end portion.

[0024] A third aspect of the present disclosure provides a vehicle including a capacitor - power device assembly.

[0025] In the power device provided by the present disclosure, the first electrical connection end and the second electrical connection end are stacked in a second direction, and the direction of the alternating magnetic field generated by the alternating current at the first electrical connection end is opposite to the direction of the alternating magnetic field generated by the alternating current at the second electrical connection end. As a result, the alternating magnetic fields generated on the first electrical connection end and the alternating magnetic field generated on the second electrical connection end can at least partially cancel each other out, reducing the stray inductance of the power device, reducing the influence of the stray inductance on the power device and the circuit in which the power device is arranged, and improving the anti - interference ability and stability of the power device.

[0026] Other features and advantages of the present disclosure will be described in detail in the following detailed description section.

[0027] The accompanying drawings are intended to provide a further understanding of the present disclosure and form a part of this specification, and together with the following detailed description, serve to clarify the present disclosure, but should not be construed as a limitation to the present disclosure.

Brief Description of the Drawings

[0028] [Figure 1] A perspective view of a power device according to an exemplary embodiment of the present disclosure. [Figure 2] A perspective view of a capacitor - power device assembly according to an exemplary embodiment of the present disclosure. [Figure 3] A perspective view of an intermediate connector of a capacitor - power device assembly according to an exemplary embodiment of the present disclosure. [Figure 4] A side view of a capacitor - power device assembly according to an exemplary embodiment of the present disclosure. [Figure 5] An enlarged view of part "A" of FIG. 4. [Figure 6]This is an enlarged view of a capacitor-power supply device assembly according to an exemplary embodiment of the present disclosure. [Figure 7] This is a side view of a capacitor-power supply device assembly according to another exemplary embodiment of the present disclosure. [Figure 8] This is an enlarged view of section "B" in Figure 7. [Figure 9] This is a side view of a capacitor-power supply device assembly according to another exemplary embodiment of the present disclosure. [Figure 10] This is an enlarged view of section "C" in Figure 9. [Modes for carrying out the invention]

[0029] Specific embodiments of this disclosure will be described in detail with reference to the accompanying drawings. It should be understood that the detailed descriptions provided herein are for illustrative and explanatory purposes only and are not intended to limit this disclosure.

[0030] Unless otherwise stated, the terms of orientation used herein, such as “first direction,” “second direction,” and “third direction,” are directions defined to facilitate the description of the structure of electrical device modules and do not restrict them. “First direction,” and “second direction” may mean the first and second directions indicated by the arrows in Figures 1, 2, 4, 7, and 9; “third direction” may mean the third direction indicated by the arrows in Figures 1 and 2; and “inner,” and “outer” may mean the inside and outside of the contours of the relevant components. In addition, it should be noted that terms such as “first,” and “second,” are used to distinguish one element from another and do not have any order or importance. Furthermore, in descriptions referring to drawings, the same reference numerals in different drawings refer to the same element.

[0031] In conventional technology, the function of a power supply device is to convert the power output and provide a three-phase power input to the motor. After the power supply device is connected to a three-phase AC current circuit, the electromagnetic induction effect of the AC current excites stray inductance at the connection point of the power supply device. This stray inductance causes increased voltage fluctuations that can damage the power supply device and affect vehicle safety.

[0032] As shown in Figures 1 to 10, a first aspect of the present disclosure provides a power supply device 100. The power supply device 100 includes a power supply device body 1, a first electrical connector 21, and a second electrical connector 22, wherein the first electrical connector 21 includes a first electrical connection end 211 extending from the power supply device body 1 in a first direction, and the second electrical connector 22 includes a second electrical connection end 221 extending from the power supply device body 1, the direction of current passing through the first electrical connector 21 being opposite to the direction of current passing through the second electrical connector 22, and the first electrical connection end 211 and the second electrical connection end 221 are stacked in a second direction, the second direction being perpendicular to the first direction.

[0033] In the power supply device 100 described above, the direction of the current passing through the first electrical connector 21 is set to be opposite to the direction of the current passing through the second electrical connector 22. It should be noted that the current direction referred to in this disclosure does not mean the direction of current flow in three-dimensional space, but rather the direction of current flow in the current path in the circuit originating from the power supply device 100. For example, when current flows from the power supply device 100 to an external load device in the first electrical connector 21, the current in the second electrical connector 22 flows from the external load device to the power supply device 100. That is, the direction of the current passing through the first electrical connector 21 is set to be opposite to the direction of the current passing through the second electrical connector 22.

[0034] When the power supply device 100 is connected to an AC current circuit, the AC currents in the first electrical connector 21 and the second electrical connector 22 excite the inductance, and since the currents in the first electrical connector 21 and the second electrical connector 22 have opposing directions, the direction of the magnetic field generated on the first electrical connector 21 is also opposite to the direction of the magnetic field generated on the second electrical connector 22. Since the first electrical connection end 211 and the second electrical connection end 221 are stacked in the second direction, the direction of the magnetic field generated on the first electrical connection end 211 is opposite to the direction of the magnetic field generated on the second electrical connection end 221, and the magnetic fields generated on the first electrical connection end 211 and the magnetic fields generated on the second electrical connection end 221 can at least partially cancel each other out, reducing the stray inductance of the power supply device 100 and mitigating the effect of the stray inductance on the power supply device 100 and the circuit in which the power supply device 100 is located.

[0035] In embodiments where the power supply device 100 is applied to a vehicle's motor controller, the magnetic field generated on the first electrical connection end 211 and the magnetic field generated on the second electrical connection end 221 can at least partially cancel each other out, so the stray inductance of the power supply device 100 can be reduced, the anti-interference capability of the power supply device 100 is stronger, the performance is more stable, and thereby the stability of the vehicle power supply system is improved and the safety of the vehicle is ensured.

[0036] According to the above technical solution, the first electrical connection end 211 and the second electrical connection end 221 are stacked in the second direction, and the direction of the alternating magnetic field generated by the alternating current at the first electrical connection end 211 is opposite to the direction of the alternating magnetic field generated by the alternating current at the second electrical connection end 221. As a result, the magnetic field generated on the first electrical connection end 211 and the magnetic field generated on the second electrical connection end 221 can cancel each other out at least partially, the stray inductance of the power supply device 100 can be reduced, the effect of the stray inductance on the power supply device 100 and the circuit in which the power supply device 100 is located is mitigated, and the anti-interference capability and stability of the power supply device 100 are improved.

[0037] The inductances between the first electrical connection end 211 and the second electrical connection end 221 interact, and to allow the magnetic fields generated on the first electrical connection end 211 and the magnetic fields generated on the second electrical connection end 221 to cancel each other out as much as possible, optionally, the projection of the first electrical connection end 211 in the second direction may completely cover the projection of the second electrical connection end 221 in the second direction, or the projection of the second electrical connection end 221 in the second direction may completely cover the projection of the first electrical connection end 211 in the second direction. That is, one projection of the first electrical connection end 211 and the second electrical connection end 221 in the second direction is completely contained within the projection of the other in the second direction, and as a result, the magnetic field generated on one of the first electrical connection end 211 and the second electrical connection end 221 can be canceled out as much as possible by the magnetic field generated on the other, thereby minimizing the stray inductance of the power supply device 100.

[0038] The shorter the distance between the first electrical connection end 211 and the second electrical connection end 221 in the second direction, the better the cancellation effect of the magnetic fields generated on the first electrical connection end 211 and the second electrical connection end 221. Theoretically, when the first electrical connection end 211 and the second electrical connection end 221 completely overlap, the magnetic fields on the first electrical connection end 211 and the second electrical connection end 221 can be completely canceled out. In practical applications, optionally, the distance between the first electrical connection end 211 and the second electrical connection end 221 in the second direction may be 1 mm or less, in which embodiment the first electrical connection end 211 and the second electrical connection end 221 can be positioned without positional interference, and the inductances at the first electrical connection end 211 and the second electrical connection end 221 can be ensured to have a good cancellation effect. In this embodiment, optionally, the distance between the first electrical connection end 211 and the second electrical connection end 221 in the second direction may be 0.5 mm.

[0039] As an exemplary embodiment, as shown in Figures 1 and 2, optionally, the width of the first electrical connection end 211 in the third direction is equal to the width of the second electrical connection end 221 in the third direction, and both the first and second directions are perpendicular to the third direction. In this embodiment, the width of the first electrical connection end 211 in the third direction is the same as the width of the second electrical connection end 221 in the third direction, and the width of the current path through the first electrical connection end 211 is the same as the width of the current path through the second electrical connection end 221. As a result, the strengths of the magnetic fields generated on the first electrical connection end 211 and the second electrical connection end 221 are close to each other, thereby allowing them to cancel each other out as much as possible to minimize the stray inductance of the power supply device 100.

[0040] As shown in Figure 1, to facilitate the distinction between the first electrical connection end 211 and the second electrical connection end 221, optionally, the length of the first electrical connection end 211 in the first direction is greater than the length of the second electrical connection end 221 in the first direction, or the length of the second electrical connection end 221 in the first direction is greater than the length of the first electrical connection end 211 in the first direction. When the first electrical connection end 211 and the second electrical connection end 221 are connected to an external load device, respectively, the operator can distinguish the connection relationship between the first electrical connection end 211 and the second electrical connection end 221 according to the different lengths of the first electrical connection end 211 and the second electrical connection end 221 in the first direction, thereby ensuring that the first electrical connection end 211 and the second electrical connection end 221 can be correctly connected to the external load device. Specifically, in embodiments where the external load device is a high-voltage electrical structure, the voltage of the load device is high, so if a misconnection occurs between the first electrical connection end 211 and the second electrical connection end 221 of the power supply device 100 and the high-voltage load device, damage, breakage, or failure of the power supply device 100 can easily occur. Therefore, in this embodiment, the lengths of the first electrical connection end 211 and the second electrical connection end 221 in the first direction are different, which facilitates the operator to distinguish and identify the first electrical connection end 211 and the second electrical connection end 221, thereby ensuring the correct installation of the power supply device 100.

[0041] The voltage polarities on the first electrical connection end 211 and the second electrical connection end 221 are opposite, and to achieve insulation between the first electrical connection end 211 and the second electrical connection end 221, the power supply device 100 may optionally further include a first insulating sheet 3, at least a portion of which is positioned between the first electrical connection end 211 and the second electrical connection end 221, and at least one projection of the first electrical connection end 211 and the second electrical connection end 221 in a second direction is fully positioned within the projection of the first insulating sheet 3 in a second direction, thereby ensuring that the first electrical connection end 211 and the second electrical connection end 221 are completely insulated to avoid a short circuit between them and to ensure the safety of the power supply device 100. In this embodiment, the first insulating sheet 3 can be made of any material having insulating properties, such as rubber, nylon, polyethylene, polypropylene, or polyester, and this disclosure does not impose any specific limitations thereon.

[0042] In this embodiment, optionally, a plurality of first insulating sheets 3 may also be included, and the plurality of first insulating sheets 3 are stacked in a second direction to reduce the risk of the plurality of first insulating sheets 3 being destroyed simultaneously, to improve the stability of the power supply device 100 when the power supply device 100 is connected to a high-voltage circuit, and to ensure the safety of the power supply device 100.

[0043] As shown in Figures 2 to 10, a second aspect of the present disclosure provides a capacitor-power device assembly 200 including the capacitor 4 and power device 100, wherein a first electrical connection end 211 and a second electrical connection end 221 of the power device 100 are connected to the capacitor 4.

[0044] Optionally, the capacitor 4 may include a capacitor body 40, a third electrical connector 41, and a fourth electrical connector 42. The third electrical connector 41 includes a third electrical connection end 411 extending from the capacitor body 40 in a first direction, and the fourth electrical connector 42 includes a fourth electrical connection end 421 extending from the capacitor body 40, wherein the direction of current passing through the third electrical connector 41 is set to be opposite to the direction of current passing through the fourth electrical connector 42, the third electrical connection end 411 and the fourth electrical connection end 421 are stacked in a second direction, the third electrical connection end 411 is connected to the first electrical connection end 211, and the fourth electrical connection end 421 is connected to the second electrical connection end 221.

[0045] In the capacitor-power device assembly 200, the third electrical connection end 411 and the fourth electrical connection end 421 are stacked in the second direction, the currents in the third electrical connector 41 and the fourth electrical connector 42 have opposing directions, the direction of the magnetic field generated on the third electrical connector 41 is opposite to the direction of the magnetic field generated on the fourth electrical connector 42, and the magnetic fields generated on the third electrical connection end 411 and the magnetic fields generated on the fourth electrical connection end 421 can at least partially cancel each other out, as a result the stray inductance of the capacitor 4 is reduced and the effect of stray inductance on the capacitor 4 and the power device 100 is mitigated. Thus, the capacitor-power device assembly 200 provided by this embodiment has good anti-interference capability and stability.

[0046] As an exemplary implementation scenario, the capacitor-power device assembly 200 can be applied to a vehicle's motor controller. One end of the capacitor 4 may be electrically connected to the power device 100, and the other end may be electrically connected to the vehicle's battery pack. Because the stray inductance generated in the capacitor-power device assembly 200 is low, the capacitor-power device assembly 200 has little interference and impact on the vehicle's battery pack or other electrical structures, resulting in good stability for the vehicle's motor controller and improved overall vehicle safety.

[0047] To ensure the safety of the capacitor-power device assembly 200, the power device 100 may optionally further include a first insulating sheet 3, as shown in Figures 4 and 5, at least a portion of the first insulating sheet 3 being placed between the first electrical connection end 211 and the second electrical connection end 221 to insulate the current at the first and second electrical connection ends 211 and 221. The capacitor 4 may further include a second insulating sheet 44, at least a portion of the second insulating sheet 44 being placed between the third and fourth electrical connection ends 411 and 421 to insulate the current at the third and fourth electrical connection ends 421. To improve the insulation effect, at least a portion of the first insulating sheet 3 and at least a portion of the second insulating sheet 44 may optionally be stacked in a second direction.

[0048] As shown in Figures 4 and 5, optionally, a portion of the first insulating sheet 3 is placed between the third electrical connection end 411 and the fourth electrical connection end 421. Optionally, a portion of the second insulating sheet 44 is placed between the first electrical connection end 211 and the second electrical connection end 221.

[0049] In the prior art, capacitors and power supply devices are typically connected by bolts. Since bolt connections require a certain amount of space to be occupied on the connection ends of the capacitor and power supply devices, the connection ends have a large size problem. The large size of the connection ends results in long current paths, and consequently, a large amount of stray inductance at the connection ends. In the capacitor-power supply device assembly 200 provided by embodiments of this disclosure, optionally, the first electrical connection end 211 of the power supply device 100 and the third electrical connection end 411 of the capacitor 4 may be connected by fusion welding, and the second electrical connection end 221 of the power supply device 100 and the fourth electrical connection end 421 of the capacitor 4 may be connected by fusion welding. In this specification, fusion welding means any process such as laser welding, ultrasonic welding, or high-energy particle welding. For example, a laser welding method may be used, i.e., the energy source of the welding method is a laser. This disclosure does not impose any specific limitations in this regard.

[0050] Compared with prior art solutions, in the embodiments provided by this disclosure, screw holes can be eliminated from the first electrical connection ends 211 and the second electrical connection ends 221 of the power supply device 100, and screw holes can be eliminated from the third electrical connection ends 411 and the fourth electrical connection ends 421 of the capacitor 4. As a result, the overall size of the first electrical connection ends 211, the second electrical connection ends 221, the third electrical connection ends 411, and the fourth electrical connection ends 421 can be reduced, the structure of the capacitor-power supply device assembly 200 becomes more compact, the current path of the current flowing between the capacitor 4 and the power supply device 100 is shortened, thus reducing stray inductance, and the overall stability and anti-interference capability of the capacitor-power supply device assembly 200 is further improved.

[0051] During the manufacturing process of the capacitor-power device assembly 200, the first electrical connection end 211 and the second electrical connection end 221 are stacked, and the third electrical connection end 411 and the fourth electrical connection end 421 are stacked. Therefore, when the first electrical connection end 211 and the third electrical connection end 411 undergo fusion processing, the energy source for the fusion processing may be located on the side of the first electrical connection end 211 and the third electrical connection end 411, farther from the second electrical connection end 221 and the fourth electrical connection end 421, in order to perform fusion scanning over the connection points of the first electrical connection end 211 and the third electrical connection end 411. Similarly, when the second electrical connection end 221 and the fourth electrical connection end 421 undergo fusion processing, the energy source for the fusion processing may be positioned on the side of the second electrical connection end 221 and the fourth electrical connection end 421, farther from the first electrical connection end 211 and the third electrical connection end 411, in order to perform fusion scanning over the connection positions of the second electrical connection end 221 and the fourth electrical connection end 421. Therefore, in the above processing mode, the position of the energy source for the fusion processing needs to be adjusted, or the capacitor-power supply device assembly 200 needs to be rotated as a whole.

[0052] To simplify the processing of the capacitor-power device assembly 200, in an exemplary embodiment, as shown in Figures 2 to 5, optionally, a gap 43 exists between the end of a third electrical connection end 411 furthest from the capacitor body 40 and the end of a first electrical connection end 211 furthest from the power device body 1, a first welding area 61 is formed at the connection position of the fourth electrical connection end 421 and the second electrical connection end 221, at least a portion of the first welding area 61 is exposed through the gap 43, and the capacitor-power device assembly 200 further includes an intermediate connector 5, the third electrical connection end 411 and the first electrical connection end 211 are connected by the intermediate connector 5.

[0053] In the above embodiment, the gap 43 exists between the end of the third electrical connection end 411, which is farther from the capacitor body 40, and the end of the first electrical connection end 211, which is farther from the power supply device body 1. An energy source for fusion processing can be positioned on the side of the first electrical connection end 211 and the third electrical connection end 411, which are farther from the second electrical connection end 221 and the fourth electrical connection end 421, to perform scanning. The energy provided by the energy source can pass through the gap 43 and scan the first weld area 61 at the connection locations of the second electrical connection end 221 and the fourth electrical connection end 421. After the first weld area 61 has been fused, the intermediate connector 5 is positioned between the third electrical connection end 411 and the first electrical connection end 211, and the energy source can scan the intermediate connector 5 and the third electrical connection end 411, as well as the intermediate connector 5 and the first electrical connection end 211, respectively. Therefore, when the capacitor-power device assembly 200 is processed, it can be processed without adjusting or changing the position of the capacitor-power device assembly 200 or the energy source within a wide range, and as a result, the processing of the capacitor-power device assembly 200 is simplified and production efficiency is improved.

[0054] It should be noted that the connection between the intermediate connector 5 and the first electrical connection end 211 and the third electrical connection end 411 is not limited to the fusion welding process described above, but may also be made by joining, snapping, or screwing, and this disclosure does not impose any specific limitations thereon. The connection between the second electrical connection end 221 and the fourth electrical connection end 421 is also not limited to fusion welding, but may also be made by joining, snapping, or screwing. The gap 43 between the first electrical connection end 211 and the third electrical connection end 411 provides working space for connecting the second electrical connection end 221 and the fourth electrical connection end 421. As a result, the operator can process the second electrical connection end 221 and the fourth electrical connection end 421 from the side of the first electrical connection end 211 and the third electrical connection end 411 that is further away from the second electrical connection end 221 and the fourth electrical connection end 421, thus simplifying the processing of the capacitor power supply device assembly 200. This also avoids having to adjust or change the position of the capacitor power supply device assembly 200 or the energy source over a wide range.

[0055] In this embodiment, the intermediate connector 5 may optionally be positioned across the gap 43 so as to cover the gap 43, with one end of the intermediate connector 5 connected to the third electrical connection end 411 and the other end of the intermediate connector 5 connected to the first electrical connection end 211. The one end of the intermediate connector 5 and the third electrical connection end 411 may be butted facing each other or stacked and superimposed, and the other end of the intermediate connector 5 and the first electrical connection end 211 may be butted facing each other or stacked and superimposed, and the disclosure does not impose any specific limitations thereon.

[0056] As an exemplary embodiment, as shown in Figures 3 and 5, the intermediate connector 5 may optionally include a body portion 51, a first overlapping portion 52 located on one side of the body portion 51, and a second overlapping portion 53 located on the other side of the body portion 51, wherein the first overlapping portion 52 is superimposed on a third electrical connection end 411, and the second overlapping portion 53 is superimposed on the first electrical connection end 211.

[0057] To facilitate the placement of the first overlapping portion 52 and the second overlapping portion 53, the first placement portion 511 and the second placement portion 512 are optionally placed on the main body portion 51, the first placement portion 511 is configured to align with the end face of the end of the third electrical connection end 411 that is farther from the capacitor body 40, and the second placement portion 512 is configured to align with the end face of the end of the first electrical connection end 211 that is farther from the power supply device body 1.

[0058] The first positioning portion 511 and the second positioning portion 512 may be a positioning line, a positioning groove, or a positioning surface, etc. In one exemplary embodiment, optionally, the main body portion 51 is formed as a U-shaped structure having an opening facing the gap 43, the first positioning portion 511 is a first inner side wall or a first outer side wall of the U-shaped structure close to the first overlapping portion 52, and the second positioning portion 512 is a second inner side wall or a second outer side wall of the U-shaped structure close to the second overlapping portion 53.

[0059] In embodiments in which the capacitor 4 and the power supply device 100 are processed by fusion welding, optionally, a first overlapping portion 52 is welded to a third electrical connection end 411 by fusion welding, and a second welding area 62 exists between the first overlapping portion 52 and the third electrical connection end 411. A second overlapping portion 53 is welded to a first electrical connection end 211 by fusion welding, and a third welding area 63 exists between the second overlapping portion 53 and the first electrical connection end 211.

[0060] As shown in Figure 6, the positions of the first welding area 61, the second welding area 62, and the third welding area 63 are illustratively indicated by dotted lines in Figure 6. Optionally, the distance b between the edge of the second welding area 62 near the main body portion 51 and the first arrangement portion 511 may be between 1 mm and 4 mm to ensure good current transfer efficiency between the first electrical connection end 211 and the third electrical connection end 411. Optionally, the distance a between the edge of the third welding area 63 near the main body portion 51 and the second arrangement portion 512 may be between 1 mm and 4 mm to ensure good current transfer efficiency between the second electrical connection end 221 and the fourth electrical connection end 421.

[0061] In embodiments in which the capacitor 4 and the power supply device 100 are processed by a fusion process, optionally, a first mounting area is located between the first overlapping portion 52 and the third electrical connection end 411, i.e., the first electrical connector 21 is not mounted by the first overlapping portion 52 outside the first mounting area. Optionally, the width of the first mounting area may be greater than the width of the second welding area 62, so that the energy provided by the energy source can enter the first mounting area when the external energy source scans the second welding area 62, in order to prevent the energy provided by the energy source from diverting and scanning other areas of the first electrical connection end 211 and causing damage to the first electrical connection end 211. Similarly, optionally, a second mounting area may exist between the second overlapping portion 53 and the first electrical connection end 211, and the width of the second mounting area may be greater than the width of the third welding area 63, thereby preventing the energy source from diverting and scanning other areas of the third electrical connection end 411, causing damage to the third electrical connection end 411.

[0062] In this embodiment, optionally, the width of the first mounting area and the width of the second mounting area may be 4 mm to 10 mm, and the width of the second welding area 62 and the width of the third welding area 63 may be 0.5 mm to 2 mm. Optionally, the ratio of the width of the second welding area 62 to the width of the first mounting area is less than 0.8, and the ratio of the width of the third welding area 63 to the width of the second mounting area is less than 0.8.

[0063] As shown in Figures 7 and 8, optionally, to effectively improve connection stability by using a face-to-face mounting connection mode, the end face of the first electrical connection end 211 furthest from the power supply device body 1 can be abutted against the end face of the third electrical connection end 411 furthest from the capacitor body 40, and the end face of the second electrical connection end 221 furthest from the power supply device body 1 can be abutted against the end face of the fourth electrical connection end 421 furthest from the capacitor body 40. During the connection process, the end faces of the first electrical connection end 211 furthest from the power supply device body 1 and the end faces of the third electrical connection end 411 furthest from the capacitor body 40 must be as flat as possible to minimize the gap between the abutting faces. For example, the gap between the two end faces should not exceed 0.2 mm to improve connection stability.

[0064] In this embodiment, optionally, in order to ensure that the current does not change suddenly during the flow process, to improve current stability and further improve connection stability, the two surfaces of the first electrical connection end 211 facing each other in the second direction are each coplanar with the two surfaces of the third electrical connection end 411 facing each other in the second direction, and the two surfaces of the second electrical connection end 221 facing each other in the second direction are each coplanar with the two surfaces of the fourth electrical connection end 421 facing each other in the second direction.

[0065] In another exemplary embodiment, as shown in Figures 9 and 10, optionally, the end of the first electrical connection end 211 furthest from the power supply device body 1 is superimposed with the end of the third electrical connection end 411 furthest from the capacitor body 40, and the end of the second electrical connection end 221 furthest from the power supply device body 1 is superimposed with the end of the fourth electrical connection end 421 furthest from the capacitor body 40.

[0066] For current stability, optionally, the length of the overlapping region between the first electrical connection end 211 and the third electrical connection end 411 in the first direction is 2 mm to 8 mm, and the length of the overlapping region between the second electrical connection end 221 and the fourth electrical connection end 421 in the first direction is 2 mm to 8 mm. In this embodiment, the current between the first electrical connection end 211 and the third electrical connection end 411, and the current between the second electrical connection end 221 and the fourth electrical connection end 421 are stable, and processing space for fusion processing can be secured between the first electrical connection end 211 and the third electrical connection end 411, and between the second electrical connection end 221 and the fourth electrical connection end 421.

[0067] A third aspect of this disclosure provides a vehicle including a capacitor-power device assembly 200. The vehicle may be an electric vehicle, a hybrid vehicle, a new energy vehicle, etc., and this disclosure does not specifically limit it therein. Since the capacitor-power device assembly 200 provided by embodiments of this disclosure has the advantages of strong anti-interference capability and high stability, a vehicle using the capacitor-power device assembly 200 has good stability and safety.

[0068] Preferred embodiments of the Disclosure have been described in detail above with reference to the drawings, but the Disclosure is not limited to the specific details of the embodiments described above. Various simple modifications may be made to the technical solutions of the Disclosure within the scope of the technical concepts of the Disclosure, and all such simple modifications are within the scope of the Disclosure.

[0069] In addition, it should be noted that the various technical features described in the embodiments above can be combined with each other in any suitable manner, provided they do not contradict each other. To avoid unnecessary repetition, various possible combinations are not described again in this disclosure.

[0070] In addition, various different embodiments of this disclosure can also be combined with each other and should be considered as being disclosed in this disclosure, provided that they do not conflict with the concepts of this disclosure.

Claims

1. Power supply device body (1), A first electrical connector (21) having a first electrical connection end (211) extending in a first direction from the power supply device body (1), A second electrical connector (22) having a second electrical connection end (221) extending from the power supply device body (1), Equipped with, A power supply device (100) wherein the direction of current passing through the first electrical connector (21) is set to be opposite to the direction of current passing through the second electrical connector (22), the first electrical connection end (211) and the second electrical connection end (221) are stacked in a second direction, and the second direction is perpendicular to the first direction.

2. The projection of the first electrical connection end (211) in the second direction completely covers the projection of the second electrical connection end (221) in the second direction, or The power supply device (100) according to claim 1, wherein the projection of the second electrical connection end (221) in the second direction completely covers the projection of the first electrical connection end (211) in the second direction.

3. The power supply device (100) according to claim 1 or 2, wherein the distance between the first electrical connection end (211) and the second electrical connection end (221) in the second direction is 1 mm or less.

4. The power supply device (100) according to any one of claims 1 to 3, wherein the width of the first electrical connection end (211) in the third direction is equal to the width of the second electrical connection end (221) in the third direction, and the first direction and the second direction are perpendicular to the third direction.

5. The length of the first electrical connection end (211) in the first direction is greater than the length of the second electrical connection end (221) in the first direction, or The power supply device (100) according to any one of claims 1 to 4, wherein the length of the second electrical connection end (221) in the first direction is greater than the length of the first electrical connection end (211) in the first direction.

6. The power supply device (100) according to any one of claims 1 to 5, further comprising a first insulating sheet (3), wherein at least a portion of the first insulating sheet (3) is positioned between the first electrical connection end (211) and the second electrical connection end (221), and the projection of at least one of the first electrical connection end (211) and the second electrical connection end (221) in the second direction is fully positioned within the projection of the first insulating sheet (3) in the second direction.

7. A capacitor-power device assembly (200) comprising a capacitor (4) and a power supply device (100) according to any one of claims 1 to 6, wherein the first electrical connection end (211) and the second electrical connection end (221) of the power supply device (100) are connected to the capacitor (4).

8. The capacitor (4) comprises a capacitor body (40), a third electrical connector (41), and a fourth electrical connector (42), wherein the third electrical connector (41) has a third electrical connection end (411) extending from the capacitor body (40) in the first direction, and the fourth electrical connector (42) has a fourth electrical connection end (421) extending from the capacitor body (40), The direction of the current passing through the third electrical connector (41) is set to be opposite to the direction of the current passing through the fourth electrical connector (42), and the third electrical connection end (411) and the fourth electrical connection end (421) are stacked in the second direction. The capacitor-power supply device assembly (200) according to claim 7, wherein the third electrical connection end (411) is connected to the first electrical connection end (211), and the fourth electrical connection end (421) is connected to the second electrical connection end (221).

9. A gap (43) exists between the end of the third electrical connection end (411), which is far from the capacitor body (40), and the end of the first electrical connection end (211), which is far from the power supply device body (1), and a first welding area (61) is formed at the connection position between the fourth electrical connection end (421) and the second electrical connection end (221), and at least a portion of the first welding area (61) is exposed from the gap (43), The capacitor / power supply device assembly (200) according to claim 8, further comprising an intermediate connector (5), wherein the third electrical connection end (411) and the first electrical connection end (211) are connected by the intermediate connector (5).

10. The capacitor / power supply device assembly (200) according to claim 9, wherein the intermediate connector (5) is arranged across the gap (43), one end of the intermediate connector (5) is connected to the third electrical connection end (411), and the other end of the intermediate connector (5) is connected to the first electrical connection end (211).

11. The capacitor / power supply device assembly (200) according to claim 10, wherein the intermediate connector (5) comprises a main body portion (51), a first overlapping portion (52) located on one side of the main body portion (51), and a second overlapping portion (53) located on the other side of the main body portion (51), the first overlapping portion (52) being superimposed on the third electrical connection end (411), and the second overlapping portion (53) being superimposed on the first electrical connection end (211).

12. The capacitor / power supply device assembly (200) according to claim 11, wherein a first arrangement portion (511) and a second arrangement portion (512) are arranged on the main body portion (51), the first arrangement portion (511) is configured to be aligned with the end face of the end of the third electrical connection end (411) that is farther from the capacitor body (40), and the second arrangement portion (512) is configured to be aligned with the end face of the end of the first electrical connection end (211) that is farther from the power supply device body (1).

13. The capacitor / power supply device assembly (200) according to claim 12, wherein the main body portion (51) is formed as a U-shaped structure having an opening facing the gap (43), the first arrangement portion (511) is the first inner side wall or first outer side wall of the U-shaped structure near the first overlapping portion (52), and the second arrangement portion (512) is the second inner side wall or second outer side wall of the U-shaped structure near the second overlapping portion (53).

14. The first overlapping portion (52) is welded to the third electrical connection end (411) by fusion welding, and the second welding area (62) is located between the first overlapping portion (52) and the third electrical connection end (411), and the second overlapping portion (53) is welded to the first electrical connection end (211) by fusion welding, and the third welding area (63) is located between the second overlapping portion (53) and the first electrical connection end (211), The capacitor / power supply device assembly (200) according to claim 12 or 13, wherein the distance between the edge of the second welding area (62) near the main body portion (51) and the first arrangement portion (511) is 1 mm to 4 mm, and the distance between the edge of the third welding area (63) near the main body portion (51) and the second arrangement portion (512) is 1 mm to 4 mm.

15. The first mounting area is located between the first overlapping portion (52) and the third electrical connection end (411), and the second mounting area is located between the second overlapping portion (53) and the first electrical connection end (211). The first overlapping portion (52) is welded to the third electrical connection end (411) by the fusion welding process, the second welding area (62) is located between the first overlapping portion (52) and the third electrical connection end (411), the second overlapping portion (53) is welded to the first electrical connection end (211) by the fusion welding process, the third welding area (63) is located between the second overlapping portion (53) and the first electrical connection end (211), The capacitor / power supply device assembly (200) according to any one of claims 11 to 13, wherein the width of the first mounting area is greater than the width of the second welding area (62), and the width of the second mounting area is greater than the width of the third welding area (63).

16. The width of the first mounting area and the width of the second mounting area are both 4 mm to 10 mm, and the width of the second welding area (62) and the width of the third welding area (63) are both 0.5 mm to 2 mm, or The capacitor / power supply device assembly (200) according to claim 15, wherein the ratio of the width of the second welding area (62) to the width of the first mounting area is less than 0.8, and the ratio of the width of the third welding area (63) to the width of the second mounting area is less than 0.

8.

17. The power supply device (100) further comprises the first insulating sheet (3), at least a portion of which is disposed between the first electrical connection end (211) and the second electrical connection end (221), and the capacitor (4) further comprises the second insulating sheet (44), at least a portion of which is disposed between the third electrical connection end (411) and the fourth electrical connection end (421), A capacitor-power device assembly (200) according to any one of claims 8 to 13, wherein a portion of the first insulating sheet (3) and a portion of the second insulating sheet (44) are stacked in the second direction.

18. A portion of the first insulating sheet (3) is positioned between the third electrical connection end (411) and the fourth electrical connection end (421), and / or The capacitor / power supply device assembly (200) according to claim 17, wherein a portion of the second insulating sheet (44) is disposed between the first electrical connection end (211) and the second electrical connection end (221).

19. A vehicle comprising a capacitor / power supply device assembly (200) according to any one of claims 7 to 18.

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