Busbar structure, power module, power electronic equipment and vehicle

Abstract

The utility model discloses a busbar structure, a power module, a power electronic device and a vehicle, and the busbar structure comprises a positive busbar which comprises a positive busbar body; the negative busbar comprises a negative busbar main body; one end of the positive busbar main body is provided with a positive laminated sheet, one end of the negative busbar main body is provided with a negative laminated sheet, the positive laminated sheet and the negative laminated sheet are oppositely laminated, one of the positive laminated sheet and the negative laminated sheet is provided with an avoiding gap, and a pin on the other one of the positive laminated sheet and the negative laminated sheet penetrates through the avoiding gap. Therefore, the positive electrode laminated sheet and the negative electrode laminated sheet are oppositely laminated, and one of the positive electrode laminated sheet and the negative electrode laminated sheet is provided with the avoiding gap for arranging the pin on the other one, so that the lamination area between the positive electrode busbar and the negative electrode busbar can be increased, and the parasitic inductance in the busbar structure can be reduced; the reliability of the power module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a busbar structure, a power module, a power electronic device and a vehicle. Background Art

[0002] Power semiconductor modules are circuit modules that combine power semiconductor chips into a whole according to certain functional combinations. They have the advantages of small size and high power density, so they are widely used in the field of new energy vehicles. With the continuous development of the electric vehicle industry, automotive power modules are an indispensable key component in the control system of electric vehicles. The performance of the automotive power module itself has a certain impact on the overall performance optimization of the vehicle.

[0003] In the prior art, there is stray inductance in the power semiconductor module. When the power semiconductor module is turned on or off, the current rises and falls suddenly. Due to the existence of stray inductance, an induced voltage is generated on the positive and negative lead terminals of the module, causing voltage fluctuations when the module is turned on or off. In addition, the terminal overcurrent capacity of the existing power semiconductor module is low and cannot meet the needs of high-power modules. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a busbar structure, which can reduce stray inductance.

[0005] Another objective of the present invention is to provide a power module.

[0006] Another object of the present invention is to provide a power electronic device.

[0007] Another object of the present invention is to provide a vehicle.

[0008] The busbar structure according to the embodiment of the utility model comprises: a positive busbar, the positive busbar comprises a positive busbar body and a plurality of positive pins, the plurality of positive pins are arranged at intervals along a first direction at one end of the positive busbar body; a negative busbar, the negative busbar comprises a negative busbar body and a plurality of negative pins, the plurality of negative pins are arranged at intervals along a first direction at one end of the negative busbar body, wherein the plurality of positive pins and the plurality of negative pins form a plurality of pin groups arranged at intervals in the first direction, the pin groups comprise pins arranged at intervals in the first direction At least one of the positive electrode pins and at least one of the negative electrode pins; a positive electrode laminate is provided at one end of the positive busbar body, and the positive electrode pin is provided on the positive electrode laminate; a negative electrode laminate is provided at one end of the negative busbar body, and the negative electrode pin is provided on the negative electrode laminate; the positive electrode laminate and the negative electrode laminate are relatively stacked, and one of the positive electrode laminate and the negative electrode laminate is provided with an avoidance notch; in one of the pin groups, the pin on the other of the positive electrode laminate and the negative electrode laminate passes through the avoidance notch.

[0009] Therefore, by arranging the positive electrode laminate and the negative electrode laminate to be relatively stacked, and setting an avoidance notch in one of the positive electrode laminate and the negative electrode laminate for setting the pins on the other, the stacking area between the positive busbar and the negative busbar can be increased, thereby reducing the parasitic inductance in the busbar structure and improving the reliability of the power module.

[0010] In some examples of the present invention, the positive busbar body and the negative busbar body both extend in the second direction, the positive busbar body and the negative busbar body are arranged relative to each other in the third direction, the positive laminated sheet is bent toward the third direction relative to the positive busbar body, and the negative laminated sheet is bent toward the third direction relative to the negative busbar body, and in one of the pin groups, the negative laminated sheet and the positive laminated sheet are arranged relative to each other in the second direction, wherein the first direction, the second direction and the third direction are staggered with each other, and the angle between any two of the first direction, the second direction and the third direction is greater than or equal to 90°.

[0011] In some examples of the present invention, the positive pin includes a first pin portion and a second pin portion, the first pin portion is connected to the positive electrode laminate, the first pin portion extends toward the second direction close to the side of the negative electrode laminate, the second pin portion is connected to the end of the first pin portion away from the positive electrode laminate, and the second pin portion extends toward a third direction away from the side of the positive busbar body; the negative pin includes a third pin portion and a fourth pin portion, the third pin portion is connected to the negative electrode laminate, the third pin portion extends toward the second direction away from the side of the positive electrode laminate, the fourth pin portion is connected to the end of the third pin portion away from the negative electrode laminate, and the fourth pin portion extends toward the third direction away from the side of the negative busbar body.

[0012] In some examples of the present invention, an avoidance gap is provided on the negative electrode laminate, and in one of the pin groups, the positive electrode pin passes through the avoidance gap.

[0013] In some examples of the present invention, the pin group includes two positive pins and two negative pins, and the two negative pins are respectively arranged on both sides of the first direction of the two positive pins; or the two positive pins are respectively arranged on both sides of the first direction of the two negative pins.

[0014] In some examples of the present invention, the two positive pins and the two negative pins of each pin group are arranged asymmetrically with respect to a center line extending in the second direction of the pin group.

[0015] In some examples of the present invention, the positive pin is arranged at one end of the positive busbar body in the second direction, and at least one positive terminal is arranged at the other end of the positive busbar body in the second direction, the positive terminal is electrically connected to the positive pin, the positive pin is located on one side of the positive busbar body in the third direction, and the positive terminal is located on the other side of the positive busbar body in the third direction away from the positive pin; the negative pin is arranged at one end of the negative busbar body in the second direction, and at least one negative terminal is arranged at the other end of the negative busbar body in the second direction, the negative terminal is electrically connected to the negative pin, the negative pin is located on one side of the negative busbar body in the third direction, the negative terminal is located on the other side of the negative busbar body in the third direction away from the negative pin, and the positive terminal and the negative terminal are located on the same side of the third direction.

[0016] In some examples of the present invention, there are multiple negative terminals and multiple positive terminals, and the multiple positive terminals and the multiple negative terminals are alternately arranged in sequence in the first direction.

[0017] In some examples of the present utility model, the positive busbar body includes a first positive main body portion and a second positive main body portion connected to each other, the length of the first positive main body portion in the second direction is smaller than the length of the second positive main body portion in the second direction, the first positive main body portion and the second positive main body portion are both provided with the positive pin at one end in the second direction, and the positive terminal is provided at the other end of the second positive main body portion in the second direction; the negative busbar body includes a first negative main body portion and a second negative main body portion connected to each other, the length of the first negative main body portion in the second direction is smaller than the length of the second negative main body portion in the second direction, the first negative main body portion and the second negative main body portion are both provided with the negative pin at one end in the second direction, and the negative terminal is provided at the other end of the second negative main body portion in the second direction.

[0018] The power module according to the present utility model comprises the busbar structure described above.

[0019] The power electronic device according to the utility model comprises the power module mentioned above.

[0020] The vehicle according to the present utility model comprises the power electronic device mentioned above.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a three-dimensional diagram of a power module according to an embodiment of the utility model;

[0024] Figure 2 is a schematic diagram of a power module according to an embodiment of the utility model;

[0025] Figure 3 is a schematic diagram of a busbar structure according to an embodiment of the utility model;

[0026] Figure 4 is a schematic diagram of a positive busbar according to an embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of a negative busbar according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] 1000. Power module;

[0030] 100, busbar structure; 200, base plate;

[0031] 10. positive busbar; 11. positive busbar body; 111. first positive main body; 112. second positive main body; 12. positive pin; 121. first pin; 122. second pin; 13. positive laminate; 14. positive terminal;

[0032] 20. negative busbar; 21. negative busbar body; 211. first negative main body; 212. second negative main body; 22. negative pin; 221. third pin; 222. fourth pin; 23. negative laminate; 231. avoidance notch; 24. negative terminal;

[0033] 30. Pin group. DETAILED DESCRIPTION

[0034] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0035] Reference below Figure 1-Figure 5 A busbar structure 100 according to an embodiment of the present invention is described. The busbar structure 100 can be applied to a power module 1000. The power module 1000 equipped with the busbar structure 100 of the present invention can be applied to power electronic equipment. The power electronic equipment equipped with the power module 1000 of the present invention can be applied to vehicles.

[0036] Combination Figure 3-Figure 5 As shown, the busbar structure 100 according to the utility model can mainly include: a positive busbar 10 and a negative busbar 20, wherein the positive busbar 10 includes a positive busbar body 11 and a plurality of positive pins 12, and the plurality of positive pins 12 are arranged at intervals along the first direction at one end of the positive busbar body 11, and the negative busbar 20 includes a negative busbar body 21 and a plurality of negative pins 22, and the plurality of negative pins 22 are arranged at intervals along the first direction at one end of the negative busbar body 21. Specifically, when the external circuit is connected to the positive busbar 10 and the negative busbar 20 at the same time, the current can flow from the positive busbar 10 into the power module 1000, and then flow out of the power module 1000 from the negative busbar 20, so the current flows in the positive busbar 10 and the negative busbar 20 in opposite directions. The positive busbar body 11 can provide a stable and reliable setting position for the positive pin 12, so that the positive pin 12 is connected to the metal area in the power module 1000.

[0037] Furthermore, the negative busbar body 21 can provide a stable and reliable setting position for the negative pin 22, which facilitates the connection between the negative pin 22 and the metal area in the power module 1000. Providing multiple positive pins 12 and multiple negative pins 22 in the busbar structure 100 can increase the current input and output power of the power module 1000, so that the power module 1000 in the utility model can be applied to modules with large current levels.

[0038] Furthermore, multiple positive pins 12 are arranged at intervals along the first direction at one end of the positive busbar body 11, so that the multiple positive pins 12 can be arranged independently of each other on the positive busbar 10, and multiple negative pins 22 are arranged at intervals along the first direction at one end of the negative busbar body 21, so that the multiple negative pins 22 can be arranged independently of each other on the negative busbar. The multiple positive pins 12 arranged in parallel and the multiple negative pins 22 arranged in parallel can form a parallel branch in the busbar structure 100, which is suitable for modules with large current and high power levels.

[0039] Further, a plurality of positive pins 12 and a plurality of negative pins 22 form a plurality of pin groups 30 spaced apart in the first direction, and the pin group 30 includes at least one positive pin 12 and at least one negative pin 22 spaced apart in the first direction. Specifically, the plurality of pin groups 30 composed of the positive pins 12 and the negative pins 22 are spaced apart along the first direction of the busbar structure 100, so that each of the plurality of pin groups 30 can be independently arranged, and a plurality of parallel branches are formed in the busbar structure 100 for current sharing in the power module 1000. There is at least one positive pin 12 and negative pin 22 included in the pin group 30, so that the number of positive pins 12 and negative pins 22 can be increased in each of the plurality of pin groups 30, so that the busbar structure 100 can be used to carry a larger current.

[0040] Furthermore, a positive electrode laminate 13 is provided at one end of the positive busbar body 11, and the positive electrode pin 12 is provided on the positive electrode laminate 13. A negative electrode laminate 23 is provided at one end of the negative busbar body 21, and the negative electrode pin 22 is provided on the negative electrode laminate 23. The positive electrode laminate 13 and the negative electrode laminate 23 are relatively stacked. Specifically, a positive electrode laminate sheet 13 is arranged on the positive electrode busbar body 11, and a negative electrode laminate sheet 23 is arranged on the negative electrode busbar body 21, and the positive electrode laminate sheet 13 and the negative electrode laminate sheet 23 are arranged in a relatively stacked manner, which can increase the stacking area between the positive electrode busbar 10 and the negative electrode busbar 20. In this way, when current flows through the power module 1000, the current on the positive electrode busbar 10 and the current on the negative electrode busbar 20 can be close to each other, so that the area where mutual inductance is generated can be larger, thereby offsetting more parasitic inductance in the power module 1000, which is conducive to reducing the possibility of large voltage and current overshoot and switching oscillation in the power module 1000 during the switching process. Such a setting can improve the reliability of the power module 1000 and help reduce the breaking loss of the power module 1000.

[0041] Furthermore, one of the positive electrode laminate 13 and the negative electrode laminate 23 is provided with an avoidance notch 231, and the avoidance notch 231 can facilitate the arrangement of the positive electrode pin 12 on the positive electrode laminate 13 and the negative electrode pin 22 on the negative electrode laminate. When the positive electrode laminate 13 and the negative electrode laminate 23 are relatively stacked, in a pin group 30, the pin on the other of the positive electrode laminate 13 and the negative electrode laminate 23 is penetrated with the avoidance notch 231, so that the distance between the positive electrode laminate and the negative electrode laminate is shortened to increase the stacking area between the positive busbar body 11 and the negative busbar body 21, and the positive electrode pin 12 and the negative electrode pin 22 can be arranged compactly, thereby not only improving the structural compactness of the busbar structure 100, but also facilitating the reduction of the stray inductance in the busbar structure 100.

[0042] Combination Figure 3-Figure 5 As shown, the positive busbar body 11 and the negative busbar body 21 both extend in the second direction, the positive busbar body 11 and the negative busbar body 21 are arranged relative to each other in the third direction, the positive laminated sheet 13 is bent toward the third direction relative to the positive busbar body 11, and the negative laminated sheet 23 is bent toward the third direction relative to the negative busbar body 21. In a pin group 30, the negative laminated sheet 23 and the positive laminated sheet 13 are arranged relative to each other in the second direction, wherein the first direction, the second direction and the third direction are staggered with each other, and the angle between any two of the first direction, the second direction and the third direction is greater than or equal to 90°.

[0043] Specifically, the positive busbar body 11 and the negative busbar body 21 both extend in the second direction and are arranged relative to each other in the third direction, which can not only increase the structural area of ​​the positive busbar body 11 and the negative busbar body 21 to improve the structural reliability of the positive busbar body 11 and the negative busbar body 21, so as to improve the structural reliability of the positive pin 12 and the negative pin 22 in the power module 1000, but also increase the stacking area between the positive busbar body 11 and the negative busbar body 21 to increase the mutual inductance generated by the two currents flowing in opposite directions on the positive busbar 10 and the negative busbar 20, which is beneficial to offset each other with more parasitic inductances in the power module 1000, thereby further reducing the parasitic inductance in the power module 1000.

[0044] Combination Figure 4 As shown, the positive pin 12 includes a first pin portion 121 and a second pin portion 122, the first pin portion 121 is connected to the positive electrode laminate 13, the first pin portion 121 extends toward the second direction close to the side of the negative electrode laminate 23, the second pin portion 122 is connected to the end of the first pin portion 121 away from the positive electrode laminate 13, and the second pin portion 122 extends toward the third direction away from the side of the positive busbar body 11.

[0045] Specifically, the first pin portion 121 in the positive pin 12 is connected to the positive laminate sheet 13, so that the circuit between the positive laminate sheet 13 and the first pin portion 121 is connected, and the second pin portion 122 is connected to an end of the first pin portion 121 away from the positive laminate sheet 13, and the second pin portion 122 is used to be electrically connected to the area on the substrate 200, so that the current can flow smoothly between the positive pin 12 and the positive laminate sheet 13 to ensure the circuit connectivity in the positive busbar 10.

[0046] Furthermore, the first pin portion 121 extends toward a side of the negative electrode laminate 23 in the second direction, that is, the first pin portion 121 is bent relative to the positive electrode laminate 13, and the second pin portion 122 extends toward a side of the positive electrode busbar body 11 in the third direction, that is, the second pin portion 122 is bent relative to the first pin portion 121, so that the positive electrode pin 12 can be bent multiple times. Such a setting can, on the one hand, improve the flexibility and expansion capacity of the positive electrode pin 12, and enable the busbar structure 100 to withstand greater stress. On the other hand, the bent positive electrode pin 12 can cope with the temperature changes of the busbar structure 100 during use, and can withstand the stress caused by inconsistent material expansion coefficients.

[0047] Combination Figure 5As shown, the negative pin 22 includes a third pin portion 221 and a fourth pin portion 222, the third pin portion 221 is connected to the negative electrode laminate 23, the third pin portion 221 extends toward the second direction away from the side of the positive electrode laminate 13, the fourth pin portion 222 is connected to one end of the third pin portion 221 away from the negative electrode laminate 23, and the fourth pin portion 222 extends toward the third direction away from the side of the negative busbar body 21.

[0048] Specifically, the third pin portion 221 in the negative pin 22 is connected to the negative electrode laminate 23, so that the circuit between the negative electrode laminate 23 and the third pin portion 221 can be communicated, and the fourth pin portion 222 is connected to an end of the third pin portion 221 away from the negative electrode laminate 23, and the fourth pin portion 222 is used to be electrically connected to the area on the substrate 200, so that the current can flow smoothly between the negative pin 22 and the negative electrode laminate 23 to ensure the circuit connectivity in the negative busbar 20.

[0049] Furthermore, the third pin portion 221 extends toward the second direction away from the side of the positive electrode laminate 13, that is, the third pin portion 221 is bent relative to the negative electrode laminate 23, and the fourth pin portion 222 extends toward the third direction away from the side of the negative busbar body 21, that is, the fourth pin portion 222 is bent relative to the third pin portion 221, so that the negative electrode pin 22 can be bent multiple times. Such a setting can, on the one hand, improve the flexibility and expansion capacity of the negative electrode pin 22, and enable the busbar structure 100 to withstand greater stress. On the other hand, the bent negative electrode pin 22 can cope with the temperature changes of the busbar structure 100 during use, and can withstand the stress caused by inconsistent material expansion coefficients.

[0050] Combination Figure 3-Figure 5 As shown, the positive electrode laminate sheet 13 does not protrude from the negative electrode laminate sheet 23 in the third direction, and the negative electrode laminate sheet 23 is provided with an avoidance notch 231. In one pin group 30, the positive electrode pin 12 is penetrated with the avoidance notch 231. Specifically, the positive electrode laminate sheet 13 is arranged not to protrude from the negative electrode laminate sheet 23 in the third direction, so that the distance between the positive electrode laminate sheet 13 and the negative electrode laminate sheet 23 will not increase with the extension of the third direction, so that the positive electrode laminate sheet 13 and the negative electrode laminate sheet 23 can be as close to each other as possible, so that the two currents flowing in opposite directions generate a greater mutual inductance between the positive electrode laminate sheet 13 and the negative electrode laminate sheet 23, so that the parasitic inductance in the power module 1000 can be further offset, and the reliability of the power module 1000 can be further improved.

[0051] Combination Figure 1-Figure 3As shown, the pin group 30 includes two positive pins 12 and two negative pins 22. Specifically, two positive pins 12 and two negative pins 22 are provided in one pin group 30, so that the positive busbar body 11 and the negative busbar body 21 can withstand a larger current, so that the busbar structure 100 of the utility model can be applied to high-power power electronic equipment.

[0052] According to some embodiments of the utility model, the two negative pins 22 are respectively arranged on both sides of the first direction of the two positive pins 12. Such arrangement can not only make the positive pins 12 and the negative pins 22 in a pin group 30 stay away from each other, but also prevent the positive pins 12 and the negative pins 22 from accidentally contacting each other and causing a short circuit in the power module 1000, thereby ensuring the circuit reliability of the power module 1000, but also make it easier for the positive pins 12 and the negative pins 22 in the same pin group 30 to correspond to the metal area on the substrate 200 in the power module 1000, thereby improving the assembly convenience of the power module 1000.

[0053] According to other embodiments of the utility model, the two positive pins 12 are respectively arranged on both sides of the first direction of the two negative pins 22. Such arrangement can not only make the positive pins 12 and the negative pins 22 in a pin group 30 stay away from each other, but also prevent the positive pins 12 and the negative pins 22 from accidentally contacting each other and causing a short circuit in the power module 1000, thereby ensuring the circuit reliability of the power module 1000, but also make it easier for the positive pins 12 and the negative pins 22 in the same pin group 30 to correspond to the metal area on the substrate 200 in the power module 1000, thereby improving the assembly convenience of the power module 1000.

[0054] Combination Figure 1-Figure 3 As shown, the two positive pins 12 and the two negative pins 22 of each pin group 30 are asymmetrically arranged about the center line extending in the second direction of the pin group 30. Specifically, the asymmetrical arrangement of the two positive pins 12 and the two negative pins 22 in each pin group 30 can make the positive pins 12 and the negative pins 22 in each pin group 30 better adapt to the structure of the substrate 200 in the power module 1000, so that when the positive pins 12 and the negative pins 22 are connected to the substrate 200, the positive pins 12 and the negative pins 22 will not be distorted due to the bias of the metal area on the substrate 200, so that the torsion on the positive pins 12 and the negative pins 22 can be reduced, so that the positive pins 12 and the negative pins 22 can withstand greater stress, thereby improving the structural strength of the busbar structure 100.

[0055] Combination Figure 3As shown, the positive pin 12 is arranged at one end of the positive busbar body 11 in the second direction, and at least one positive terminal 14 is arranged at the other end of the positive busbar body 11 in the second direction, and the positive terminal 14 is electrically connected to the positive pin 12. Specifically, at least one positive terminal 14 is arranged at the end of the positive busbar body 11 in the second direction opposite to the positive pin 12, and the positive terminal 14 can be used to connect to an external circuit. The positive terminal 14 is connected to the positive busbar body 11, which can ensure that the positive terminal 14 is electrically connected to the positive pin 12, and the current flows smoothly from the positive terminal 14 through the positive busbar body 11 to the positive pin 12, and then flows into the power module 1000, which can ensure the position circuit connectivity of the positive busbar 10 in the power module 1000, and further ensure the circuit connectivity reliability of the power module 1000.

[0056] Combination Figure 3 As shown, the negative electrode pin 22 is arranged at one end of the negative electrode busbar body 21 in the second direction, and at least one negative electrode terminal 24 is arranged at the other end of the negative electrode busbar body 21 in the second direction, and the negative electrode terminal 24 is electrically connected to the negative electrode pin 22. Specifically, at least one negative electrode terminal 24 is arranged at the end of the negative electrode busbar body 21 in the second direction opposite to the negative electrode pin 22, and the negative electrode terminal 24 can be used to connect to an external circuit. The negative electrode terminal 24 is connected to the negative electrode busbar body 21, which can ensure that the negative electrode terminal 24 is electrically connected to the negative electrode pin 22, and the current flows smoothly from the negative electrode pin 22 through the negative electrode busbar body 21 to the negative electrode terminal 24, and then flows out of the power module 1000, which can ensure the position circuit connectivity of the negative electrode busbar 20 in the power module 1000, and further ensure the circuit connectivity reliability of the power module 1000.

[0057] Combination Figure 4 and Figure 5As shown, the positive electrode pin 12 is located on one side of the positive busbar body 11 in the third direction, the positive electrode terminal 14 is located on the other side of the positive busbar body 11 in the third direction away from the positive electrode pin 12, the negative electrode pin 22 is located on one side of the negative busbar body 21 in the third direction, the negative electrode terminal 24 is located on the other side of the negative busbar body 21 in the third direction away from the negative electrode pin 22, and the positive electrode terminal 14 and the negative electrode terminal 24 are located on the same side of the third direction. In this way, the positive busbar body 11 and the negative busbar body 21 are arranged opposite to each other in the third direction, so that the negative electrode pin 22 and the positive electrode pin 12 can be bent toward one side of the positive busbar body 11 and the negative busbar body 21 in the third direction, and the positive electrode terminal 14 and the negative electrode terminal 24 can be bent toward the other side of the positive busbar body 11 and the negative busbar body 21 in the third direction, so that the positive busbar 10 terminal and the negative busbar 20 terminal can be close to each other. Under the condition that the positive busbar 10 terminal and the negative busbar 20 terminal are not in contact, the mutual inductance generated by the two currents flowing in opposite directions on the positive busbar 10 terminal and the negative busbar 20 terminal increases as the distance between the positive busbar 10 terminal and the negative busbar 20 terminal decreases, thereby facilitating further offsetting the parasitic inductance in the power module 1000, reducing the inductance in the power module 1000, and improving the reliability of the power module 1000.

[0058] Combination Figure 1-Figure 5 As shown, the negative terminal 24 and the positive terminal 14 are both multiple, and the multiple positive terminals 14 and the multiple negative terminals 24 are alternately arranged in the first direction. Specifically, the multiple positive terminals 14 and the negative terminals 24 are arranged in the busbar structure 100 of the utility model, which can increase the maximum current that the positive busbar 10 and the negative busbar 20 can bear, and the busbar structure 100 in the utility model can be applied to modules with large current and high power levels. And the multiple positive terminals 14 and the multiple negative terminals 24 are alternately arranged in the first direction, so that the distance between the multiple positive terminals 14 and the multiple positive pins 12 can be shortened, and the distance between the multiple negative terminals 24 and the multiple negative pins 22 can be shortened, so that each positive pin 12 can be shorter from the positive terminal 14 to reduce the resistance between the positive terminal 14 and the positive pin 12, and each negative pin 22 can be shorter from the negative terminal 24 to reduce the resistance between the negative terminal 24 and the negative pin 22. Such a configuration helps to achieve current sharing among multiple parallel branches in the busbar structure 100 , and can prevent overload and no-load problems in the high-current and high-power power module 1000 , thereby improving the reliability of the power module 1000 .

[0059] Combination Figure 2As shown, the positive busbar body 11 includes a first positive main body part 111 and a second positive main body part 112 connected to each other, the length of the first positive main body part 111 in the second direction is less than the length of the second positive main body part 112 in the second direction, and the first positive main body part 111 and the second positive main body part 112 are both provided with a positive pin 12 at one end in the second direction, and the positive terminal 14 is provided at the other end in the second direction of the second positive main body part 112. Specifically, the first positive main body part 111 and the second positive main body part 112 in the positive busbar body 11 are provided with different lengths along the second direction, and the length of the first positive main body part 111 in the second direction is less than the length of the second positive main body part 112 in the second direction, so that it can adapt to the outer frame structure of the power module 1000, and the positive busbar body 11 can adapt to the structural layout of the power module 1000 in the second direction, thereby facilitating the improvement of the structural compactness of the power module 1000.

[0060] Furthermore, positive pins 12 are provided on both the first positive main body 111 and the second positive main body 112, so that both the first positive main body 111 and the second positive main body 112 can provide stable and reliable locations for the positive pins 12, and can ensure that the number of positive pins 12 of the busbar structure 100 meets the connection number requirement of the power module 1000. In addition, a positive terminal 14 is provided at one end of the second positive pin 12 portion away from the positive pin 12 in the second direction, and the area of ​​the second positive pin 12 portion is larger than that of the first positive pin 12 portion, and can provide stable and reliable locations for the positive pin 12 and the positive terminal 14 at the same time. Such a configuration is conducive to improving the structural reliability of the positive busbar main body 11, and can ensure the circuit connection reliability in the power module 1000.

[0061] Further, the negative busbar body 21 includes a first negative main body 211 and a second negative main body 212 connected to each other, the length of the first negative main body 211 in the second direction is less than the length of the second negative main body 212 in the second direction, one end of the first negative main body 211 and the second negative main body 212 in the second direction are both provided with a negative pin 22, and the negative terminal 24 is provided at the other end of the second negative main body 212 in the second direction. Specifically, the first negative main body 211 and the second negative main body 212 in the negative busbar body 21 are provided with different lengths along the second direction, and the length of the first negative main body 211 in the second direction is less than the length of the second negative main body 212 in the second direction, so that it can adapt to the outer frame structure of the power module 1000, and the negative busbar body 21 can adapt to the structural layout of the power module 1000 in the second direction, thereby facilitating the improvement of the structural compactness of the power module 1000.

[0062] Furthermore, negative electrode pins 22 are provided on both the first negative electrode main body 211 and the second negative electrode main body 212, so that both the first negative electrode main body 211 and the second negative electrode main body 212 can provide stable and reliable setting positions for the negative electrode pins 22, which can ensure that the number of negative electrode pins 22 of the busbar structure 100 meets the connection number requirement of the power module 1000. In addition, a negative terminal 24 is provided at one end of the second negative electrode pin 22 part away from the negative electrode pin 22 in the second direction, and the area of ​​the second negative electrode pin 22 part is larger than that of the first negative electrode pin 22 part, which can provide stable and reliable setting positions for the negative electrode pin 22 and the negative terminal 24 at the same time. Such a setting is conducive to improving the structural reliability of the negative electrode busbar main body 21, and can ensure the circuit connection reliability in the power module 1000.

[0063] According to an embodiment of the present invention, the busbar structure 100 can be applied to a power module 1000. Since the stacking area between the positive busbar 10 and the negative busbar 20 is increased, the parasitic inductance in the power module 1000 is smaller, the switching loss of the power module 1000 is smaller, and the reliability of the power module 1000 is improved.

[0064] According to an embodiment of the utility model, the power module 1000 can be applied to power electronic equipment. The power electronic equipment equipped with the power module 1000 of the utility model can improve the working performance and safety reliability of the power electronic equipment because the power module 1000 can withstand a larger current, has a higher output power, and has better working stability.

[0065] According to the embodiments of the utility model, power electronic equipment can be applied to vehicles. Vehicles equipped with the power electronic equipment of the utility model can further improve the overall vehicle performance because the working performance and safety of the power electronic equipment are improved, so that the vehicles equipped with the power electronic equipment of the utility model can better meet the actual situation and design requirements.

[0066] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "circumferential", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A busbar structure, characterized in that: include: A positive busbar (10), the positive busbar (10) comprising a positive busbar body (11) and a plurality of positive pins (12), the plurality of positive pins (12) being arranged at intervals along a first direction at one end of the positive busbar body (11); A negative busbar (20), the negative busbar (20) comprising a negative busbar body (21) and a plurality of negative pins (22), the plurality of negative pins (22) being arranged at intervals along a first direction at one end of the negative busbar body (21), wherein: The plurality of positive electrode pins (12) and the plurality of negative electrode pins (22) form a plurality of pin groups (30) arranged at intervals in a first direction, and the pin group (30) includes at least one positive electrode pin (12) and at least one negative electrode pin (22) arranged at intervals in the first direction; A positive electrode laminate (13) is provided at one end of the positive busbar body (11), and the positive electrode pin (12) is provided on the positive electrode laminate (13); a negative electrode laminate (23) is provided at one end of the negative busbar body (21), and the negative electrode pin (22) is provided on the negative electrode laminate (23); the positive electrode laminate (13) and the negative electrode laminate (23) are relatively stacked, and one of the positive electrode laminate (13) and the negative electrode laminate (23) is provided with an avoidance notch (231); in one of the pin groups (30), the pin on the other of the positive electrode laminate (13) and the negative electrode laminate (23) passes through the avoidance notch (231).

2. The busbar structure according to claim 1, characterized in that: The positive busbar body (11) and the negative busbar body (21) both extend in the second direction, the positive busbar body (11) and the negative busbar body (21) are arranged relative to each other in the third direction, the positive laminated sheet (13) is bent relative to the positive busbar body (11) toward the third direction, and the negative laminated sheet (23) is bent relative to the negative busbar body (21) toward the third direction. In one of the pin groups (30), the negative laminated sheet (23) and the positive laminated sheet (13) are arranged relative to each other in the second direction, wherein the first direction, the second direction and the third direction are staggered, and an angle between any two of the first direction, the second direction and the third direction is greater than or equal to 90°.

3. The busbar structure according to claim 2, characterized in that: The positive electrode pin (12) comprises a first pin portion (121) and a second pin portion (122), the first pin portion (121) being connected to the positive electrode laminate sheet (13), the first pin portion (121) extending toward a second direction close to a side of the negative electrode laminate sheet (23), the second pin portion (122) being connected to an end of the first pin portion (121) away from the positive electrode laminate sheet (13), and the second pin portion (122) extending toward a third direction away from a side of the positive electrode busbar body (11); The negative electrode pin (22) comprises a third pin portion (221) and a fourth pin portion (222), wherein the third pin portion (221) is connected to the negative electrode laminate (23), and the third pin portion (221) extends in a second direction away from a side of the positive electrode laminate (13), and the fourth pin portion (222) is connected to an end of the third pin portion (221) away from the negative electrode laminate (23), and the fourth pin portion (222) extends in a third direction away from a side of the negative electrode busbar body (21).

4. The busbar structure according to claim 3, characterized in that: The negative electrode laminate sheet (23) is provided with the avoidance notch (231), and in one of the pin groups (30), the positive electrode pin (12) passes through the avoidance notch (231).

5. The busbar structure according to claim 1, characterized in that: The pin group (30) comprises two positive pins (12) and two negative pins (22), and the two negative pins (22) are respectively arranged on both sides of the two positive pins (12) in a first direction; or The two positive electrode pins (12) are respectively arranged on both sides of the two negative electrode pins (22) in a first direction.

6. The busbar structure according to claim 5, characterized in that: The two positive electrode pins (12) and the two negative electrode pins (22) of each pin group (30) are arranged asymmetrically with respect to a center line extending in the second direction of the pin group (30).

7. The busbar structure according to claim 1, characterized in that: The positive electrode pin (12) is arranged at one end of the positive electrode busbar body (11) in the second direction, and at least one positive electrode terminal (14) is arranged at the other end of the positive electrode busbar body (11) in the second direction, and the positive electrode terminal (14) is electrically connected to the positive electrode pin (12), the positive electrode pin (12) is located on one side of the positive electrode busbar body (11) in the third direction, and the positive electrode terminal (14) is located on the other side of the positive electrode busbar body (11) in the third direction away from the positive electrode pin (12); The negative electrode pin (22) is arranged at one end of the negative electrode busbar body (21) in the second direction, and at least one negative electrode terminal (24) is arranged at the other end of the negative electrode busbar body (21) in the second direction, and the negative electrode terminal (24) is electrically connected to the negative electrode pin (22). The negative electrode pin (22) is located on one side of the negative electrode busbar body (21) in the third direction, and the negative electrode terminal (24) is located on the other side of the negative electrode busbar body (21) in the third direction away from the negative electrode pin (22), and the positive electrode terminal (14) and the negative electrode terminal (24) are located on the same side of the third direction.

8. The busbar structure according to claim 7, characterized in that: There are a plurality of the negative electrode terminals (24) and a plurality of the positive electrode terminals (14), and the plurality of the positive electrode terminals (14) and the plurality of the negative electrode terminals (24) are alternately arranged in sequence in a first direction.

9. The busbar structure according to claim 7, characterized in that: The positive busbar body (11) comprises a first positive main body (111) and a second positive main body (112) connected to each other, the length of the first positive main body (111) in the second direction is smaller than the length of the second positive main body (112) in the second direction, one end of the first positive main body (111) and the second positive main body (112) in the second direction are both provided with the positive pin (12), and the positive terminal (14) is provided at the other end of the second positive main body (112) in the second direction; The negative electrode busbar body (21) comprises a first negative electrode body part (211) and a second negative electrode body part (212) which are connected to each other, the length of the first negative electrode body part (211) in the second direction is smaller than the length of the second negative electrode body part (212) in the second direction, one end of the first negative electrode body part (211) and the second negative electrode body part (212) in the second direction are both provided with the negative electrode pin (22), and the negative electrode terminal (24) is provided at the other end of the second negative electrode body part (212) in the second direction.

10. A power module, characterized in that: include: The busbar structure (100) according to any one of claims 1 to 9.

11. A power electronic device, characterized in that: Comprising the power module (1000) according to claim 10.

12. A vehicle, characterized in that: The invention comprises the power electronic device as claimed in claim 11.

Images