Capacitor busbar, capacitor, electric power controller and power equipment

Abstract

The utility model relates to the technical field of electronic devices, and provides a capacitor busbar, a capacitor, a power controller and power equipment, and the capacitor busbar comprises a positive busbar which comprises a positive body and a positive terminal connected to the positive body; the cathode busbar comprises a cathode body and a cathode terminal connected to the cathode body; a part of the positive electrode body and a part of the negative electrode body are arranged in a laminated manner; part of the positive terminal is arranged in a self-lamination manner, and / or part of the negative terminal is arranged in a self-lamination manner. According to the capacitor busbar, at least part of the positive electrode body of the positive electrode busbar and at least part of the negative electrode body of the negative electrode busbar are arranged in the laminated mode, part of the positive electrode terminal is arranged in the self-laminated mode, and / or part of the negative electrode terminal is arranged in the self-laminated mode, so that the laminated area is enlarged, stray inductance in a circuit can be greatly reduced, circuit loss is reduced, and system efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, in particular to a capacitor busbar, a capacitor, a power controller and a power equipment. BACKGROUND

[0002] The power controller is a key component for realizing the operation of the motor. The power controller generally includes a power module and a capacitor. The power module is responsible for the connection and disconnection of the circuit, and the capacitor is mainly used for smoothing and filtering the voltage output by the power battery. Stray inductance is an important parameter in the power controller. If the stray inductance is too large, it will increase the circuit loss, thereby reducing the system efficiency, and also reducing the reliability of the power controller.

[0003] In the related art, the capacitor includes a capacitor element, a positive busbar and a negative busbar. The capacitor element is connected to the power module through the positive busbar and the negative busbar. At present, the positive busbar and the negative busbar are usually stacked to reduce the stray inductance, but the reduction range of the stray inductance is limited. CONTENT OF THE INVENTION

[0004] Therefore, the embodiments of the present application provide a capacitor busbar, a capacitor, a power controller and a power equipment to solve the problem of limited reduction range of stray inductance.

[0005] The first aspect of the present application provides a capacitor busbar, comprising:

[0006] a positive busbar comprising a positive body and a positive terminal connected to the positive body;

[0007] a negative busbar comprising a negative body and a negative terminal connected to the negative body;

[0008] a part of the positive body and a part of the negative body are arranged in a stacked manner;

[0009] a part of the positive terminal is arranged in a self-stacking manner, and / or a part of the negative terminal is arranged in a self-stacking manner.

[0010] The capacitor busbar provided by the embodiments of the present application has the beneficial effects that: in the capacitor busbar, not only a part of the positive body and a part of the negative body are arranged in a stacked manner, but also a part of the positive terminal is arranged in a self-stacking manner, and / or a part of the negative terminal is arranged in a self-stacking manner. The stacking area is increased, which can greatly reduce the stray inductance in the circuit, reduce the circuit loss and improve the system efficiency.

[0011] In addition, the self-stacking arrangement of a part of the positive terminal and / or a part of the negative terminal can shorten the overhanging length of the positive terminal and / or the negative terminal, so that the positive terminal and / or the negative terminal can effectively resist the influence of vibration, impact and the like, thereby improving the reliability of the power controller.

[0012] In some embodiments, the positive terminal comprises a first positive terminal plate segment and a second positive terminal plate segment, a first end of the second positive terminal plate segment is fixedly connected with a first end of the first positive terminal plate segment, and a second end of the second positive terminal plate segment is connected with the positive body; the first positive terminal plate segment comprises a first positive part close to the first end of the first positive terminal plate segment, and the first positive part is arranged in a laminated manner with the second positive terminal plate segment.

[0013] In some embodiments, the second end of the second positive terminal plate segment is integrally connected with the positive body; or the positive terminal further comprises a third positive terminal plate segment connected with the second end of the second positive terminal plate segment, and the second end of the second positive terminal plate segment is fixedly connected with the positive body through the third positive terminal plate segment.

[0014] In some embodiments, the negative terminal comprises a first negative terminal plate segment and a second negative terminal plate segment, a first end of the second negative terminal plate segment is fixedly connected with a first end of the first negative terminal plate segment, and a second end of the second negative terminal plate segment is connected with the negative body; the first negative terminal plate segment comprises a first negative part close to the first end of the first negative terminal plate segment, and the first negative part is arranged in a laminated manner with the second negative terminal plate segment.

[0015] In some embodiments, the second end of the second negative terminal plate segment is integrally connected with the negative body; or the negative terminal further comprises a third negative terminal plate segment connected with the second end of the second negative terminal plate segment, and the second end of the second negative terminal plate segment is fixedly connected with the negative body through the third negative terminal plate segment.

[0016] In some embodiments, the positive terminal comprises a first positive terminal plate segment and two second positive terminal plate segments, the first positive terminal plate segment comprises two first positive parts and one second positive part, the two first positive parts are arranged in a laminated manner with the two second positive terminal plate segments respectively, and the second positive part is used for connecting a power module;

[0017] The negative terminal comprises a first negative terminal plate segment and a second negative terminal plate segment, the first negative terminal plate segment comprises one first negative part and two second negative parts, the first negative part is arranged in a laminated manner with the second negative terminal plate segment, and the two second negative parts are used for connecting a power module;

[0018] In some embodiments, the second negative terminal plate segment is between the two second positive terminal plate segments, the first negative part is between the two first positive parts, and the second positive part is between the two second negative parts.

[0019] In some embodiments, the first positive terminal plate segment further comprises a third positive portion connecting two of the first positive portions and one of the second positive portions, and the first negative terminal plate segment further comprises a third negative portion connecting one of the first negative portions and two of the second negative portions; the third positive portion and the third negative portion are arranged in a stack.

[0020] In some embodiments, the third positive portion is on a side of the third negative portion facing away from the negative body, and the positive body is provided with a relief gap for avoiding the negative terminal.

[0021] In some embodiments, the positive body comprises a first positive body plate segment and a second positive body plate segment, the second positive body plate segment is arranged in a stack with the negative body, and the first positive body plate segment comprises a first bending portion arranged in a stack with the second positive body plate segment.

[0022] The second aspect of the present application provides a capacitor, comprising a capacitor element and the capacitor busbar as claimed in the first aspect, the capacitor busbar wrapping the capacitor element.

[0023] The capacitor adopts any one or more of the above-mentioned embodiments of the capacitor busbar, thus having the beneficial effects of the above-mentioned embodiments, which will not be repeated here.

[0024] The third aspect of the present application provides a power controller, comprising a power module and the capacitor as claimed in the second aspect, the capacitor connecting the power module through the positive busbar and the negative busbar.

[0025] The power controller adopts any one or more of the above-mentioned embodiments of the capacitor, thus having the beneficial effects of the above-mentioned embodiments, which will not be repeated here.

[0026] The fourth aspect of the present application provides a power equipment, comprising the power controller as claimed in the third aspect.

[0027] The power equipment adopts any one or more of the above-mentioned embodiments of the power controller, thus having the beneficial effects of the above-mentioned embodiments, which will not be repeated here.

[0028] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the conventional technical description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 is a structural schematic diagram of a capacitor busbar provided by some embodiments of the present application;

[0031] Figure 2 is Figure 1 is an exploded view of the capacitor busbar shown in

[0032] Figure 3 is Figure 2 is a side view of the first positive terminal plate segment and the first negative terminal plate segment shown in

[0033] Figure 4 is Figure 1 is a sectional view of the capacitor busbar shown in along A-A direction;

[0034] Figure 5 is Figure 4 is an enlarged view of the capacitor busbar shown in at C;

[0035] Figure 6 is Figure 1 is a sectional view of the capacitor busbar shown in along B-B direction;

[0036] Figure 7 is Figure 6 is an enlarged view of the capacitor busbar shown in at D;

[0037] Figure 8 is a structural schematic diagram of a capacitor provided by some embodiments of the present application.

[0038] The meanings of the labels in the drawings are as follows:

[0039] 100, capacitor;

[0040] 10, capacitor busbar;

[0041] 11, positive busbar; 111, positive body; 1111, first positive body plate segment; 11111, first bending part; 1112, second positive body plate segment; 11121, avoiding notch; 112, positive terminal; 1121, first positive terminal plate segment; 11211, first positive part; 11212, second positive part; 11213, third positive part; 1122, second positive terminal plate segment; 1123, third positive terminal plate segment;

[0042] 12, negative busbar; 121, negative body; 1211, second bending part; 122, negative terminal; 1221, first negative terminal plate segment; 12211, first negative part; 12212, second negative part; 12213, third negative part; 1222, second negative terminal plate segment;

[0043] 20, capacitor element. DETAILED DESCRIPTION

[0044] The embodiments of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "include," "have," or "comprise" and variations thereof herein is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises more than one of a recited item does not thereby lose its identity.

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0047] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0050] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing", etc. should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] The embodiments of the first aspect of the present application provide a capacitor busbar. Please refer to Figure 1 The capacitor busbar 10 includes a positive busbar 11 and a negative busbar 12. The positive busbar 11 includes a positive body 111 and a positive terminal 112 connected to the positive body 111; the negative busbar 12 includes a negative body 121 and a negative terminal 122 connected to the negative body 121; part of the positive body 111 and part of the negative body 121 are arranged in a stack; part of the positive terminal 112 is arranged away from the stack, and / or part of the negative terminal 122 is arranged away from the stack.

[0053] The positive terminal 112 and the negative terminal 122 are used to connect power modules. Optionally, the positive terminal 112 and the negative terminal 122 are each arranged with a plurality of terminals in the X direction.

[0054] The part of the positive body 111 and the part of the negative body 121 arranged in a stack can be understood as that the two parts are arranged in parallel or close to parallel, and a first insulating film is arranged between the two parts to avoid direct contact between the two parts.

[0055] For example, please refer to Figure 4The positive electrode body 111 includes a second positive electrode body plate segment 1112, and the negative electrode body 121 includes a second bending portion 1211. The second bending portion 1211 is arranged in parallel or close to parallel with the second positive electrode body plate segment 1112, and a first insulating film is arranged between the second bending portion 1211 and the second positive electrode body plate segment 1112. Because the current directions of the second bending portion 1211 and the second positive electrode body plate segment 1112 are opposite, the stray inductance can be reduced.

[0056] Part of the positive electrode terminal 112 is arranged in self-lamination, and / or part of the negative electrode terminal 122 is arranged in self-lamination. It can be understood that part of the positive electrode terminal 112 is arranged in self-lamination, and part of the negative electrode terminal 122 is arranged in self-lamination; or part of the positive electrode terminal 112 is arranged in self-lamination, but part of the negative electrode terminal 122 is not arranged in self-lamination; or part of the negative electrode terminal 122 is arranged in self-lamination, but part of the positive electrode terminal 112 is not arranged in self-lamination.

[0057] Part of the positive electrode terminal 112 arranged in self-lamination means that the positive electrode terminal 112 is arranged in self-lamination. Because the current directions of the positive electrode terminal 112 arranged in self-lamination are opposite, the stray inductance can be reduced.

[0058] Part of the negative electrode terminal 122 arranged in self-lamination means that the negative electrode terminal 122 is arranged in self-lamination. Because the current directions of the negative electrode terminal 122 arranged in self-lamination are opposite, the stray inductance can be reduced.

[0059] The capacitor busbar 10 provided by the embodiment of the present application has the following beneficial effects: in the capacitor busbar 10, not only part of the positive electrode body 111 and part of the negative electrode body 121 are arranged in lamination, but also part of the positive electrode terminal 112 is arranged in self-lamination, and / or part of the negative electrode terminal 122 is arranged in self-lamination, the lamination area is increased, the stray inductance in the circuit can be greatly reduced, the circuit loss is reduced, and the system efficiency is improved.

[0060] In addition, part of the positive electrode terminal 112 arranged in self-lamination, and / or part of the negative electrode terminal 122 arranged in self-lamination, can shorten the overhanging length of the positive electrode terminal 112 and / or the negative electrode terminal 122, so that the positive electrode terminal 112 and / or the negative electrode terminal 122 can effectively resist the influence of vibration, impact, etc., thereby improving the reliability of the power controller.

[0061] Please refer to Figure 1 and Figure 2In some embodiments, the positive terminal 112 includes a first positive terminal plate segment 1121 and a second positive terminal plate segment 1122, a first end of the second positive terminal plate segment 1122 is fixedly connected with a first end of the first positive terminal plate segment 1121, and a second end of the second positive terminal plate segment 1122 is connected with the positive body 111; the first positive terminal plate segment 1121 includes a first positive portion 11211 close to the first end of the first positive terminal plate segment 1121, and the first positive portion 11211 is laminated with the second positive terminal plate segment 1122.

[0062] Optionally, the first end of the second positive terminal plate segment 1122 is welded with the first end of the first positive terminal plate segment 1121.

[0063] The first positive portion 11211 and the second positive terminal plate segment 1122 are laminated, which means that the first positive portion 11211 and the second positive terminal plate segment 1122 are arranged in parallel or close to parallel, and a second insulating film is arranged between the first positive portion 11211 and the second positive terminal plate segment 1122 to avoid direct contact between the first positive portion 11211 and the second positive terminal plate segment 1122.

[0064] The first end of the second positive terminal plate segment 1122 is fixedly connected with the first end of the first positive terminal plate segment 1121, and the second end of the second positive terminal plate segment 1122 is connected with the positive body 111, so that the current direction is as shown by the arrow in the figure. Figure 5 Specifically, the current in the positive body 111 flows to the second positive terminal plate segment 1122 through the second end of the second positive terminal plate segment 1122, and then flows to the first positive terminal plate segment 1121 through the first end of the second positive terminal plate segment 1122 and the first end of the first positive terminal plate segment 1121. That is, the current direction between the second positive terminal plate segment 1122 and the first positive portion 11211 of the first positive terminal plate segment 1121 is opposite, so as to reduce the stray inductance.

[0065] Please refer to Figure 4 and Figure 5 In some embodiments, the positive terminal 112 further includes a third positive terminal plate segment 1123 connected with the second end of the second positive terminal plate segment 1122, and the second end of the second positive terminal plate segment 1122 is fixedly connected with the positive body 111 through the third positive terminal plate segment 1123.

[0066] Optionally, the second positive terminal plate segment 1122 is perpendicular or close to perpendicular to the third positive terminal plate segment 1123, that is, the second positive terminal plate segment 1122 and the third positive terminal plate segment 1123 are L-shaped as a whole.

[0067] It can be understood that the second positive terminal plate segment 1122 can be integrally connected with the third positive terminal plate segment 1123, for example, the second positive terminal plate segment 1122 and the third positive terminal plate segment 1123 are integrally bent and formed; or the second positive terminal plate segment 1122 can also be fixedly connected with the third positive terminal plate segment 1123 in a separate manner, for example, the second positive terminal plate segment 1122 and the third positive terminal plate segment 1123 are welded.

[0068] Optionally, the third positive terminal plate segment 1123 is welded with the positive body 111.

[0069] In other embodiments, the third positive terminal plate segment 1123 can not be provided, and the second end of the second positive terminal plate segment 1122 can be integrally connected with the positive body 111, for example, the second positive terminal plate segment 1122 is bent and formed on the positive body 111.

[0070] Please refer to Figure 1 and Figure 2 In some embodiments, the negative terminal 122 includes a first negative terminal plate segment 1221 and a second negative terminal plate segment 1222, a first end of the second negative terminal plate segment 1222 is fixedly connected with a first end of the first negative terminal plate segment 1221, and a second end of the second negative terminal plate segment 1222 is connected with the negative body 121; the first negative terminal plate segment 1221 includes a first negative part 12211 close to the first end of the first negative terminal plate segment 1221, and the first negative part 12211 is laminated with the second negative terminal plate segment 1222.

[0071] Optionally, the first end of the second negative terminal plate segment 1222 is welded with the first end of the first negative terminal plate segment 1221.

[0072] The first negative part 12211 and the second negative terminal plate segment 1222 are laminated, which can be understood as that the first negative part 12211 and the second negative terminal plate segment 1222 are arranged in parallel or close to parallel, and a third insulating film is arranged between the first negative part 12211 and the second negative terminal plate segment 1222 to avoid direct contact between the first negative part 12211 and the second negative terminal plate segment 1222.

[0073] The first end of the second negative terminal plate segment 1222 is fixedly connected with the first end of the first negative terminal plate segment 1221, and the second end of the second negative terminal plate segment 1222 is connected with the negative body 121, so that the current direction is as shown in Figure 7The current in the first negative terminal plate segment 1221 flows in the direction indicated by the middle arrow. Specifically, the current in the first negative terminal plate segment 1221 flows through the first end of the first negative terminal plate segment 1221, the first end of the second negative terminal plate segment 1222, and then flows through the second end of the second negative terminal plate segment 1222 to the negative body 121. That is, the current direction between the second negative terminal plate segment 1222 and the first negative part 12211 of the first negative terminal plate segment 1221 is opposite, so as to reduce the stray inductance.

[0074] Referring to Figure 6 and Figure 7 In some embodiments, the second end of the second negative terminal plate segment 1222 is integrally connected with the negative body 121.

[0075] Optionally, the second negative terminal plate segment 1222 is bent and formed on the negative body 121, so as to facilitate the processing and forming of the second negative terminal plate segment 1222.

[0076] In other embodiments, the negative terminal 122 further includes a third negative terminal plate segment connected with the second end of the second negative terminal plate segment 1222, and the second end of the second negative terminal plate segment 1222 is fixedly connected with the negative body 121 through the third negative terminal plate segment.

[0077] Referring to Figures 1 to 3 In some embodiments, the positive terminal 112 includes a first positive terminal plate segment 1121 and two second positive terminal plate segments 1122, the first positive terminal plate segment 1121 includes two first positive parts 11211 and one second positive part 11212, the two first positive parts 11211 are arranged in a stack with the two second positive terminal plate segments 1122 respectively, and the second positive part 11212 is used to connect the power module.

[0078] The negative terminal 122 includes a first negative terminal plate segment 1221 and a second negative terminal plate segment 1222, the first negative terminal plate segment 1221 includes one first negative part 12211 and two second negative parts 12212, the first negative part 12211 is arranged in a stack with the second negative terminal plate segment 1222, and the second negative part 12212 is used to connect the power module.

[0079] Wherein, the second negative terminal plate segment 1222 is between the two second positive terminal plate segments 1122, the first negative part 12211 is between the two first positive parts 11211, and the second positive part 11212 is between the two second negative parts 12212.

[0080] In other embodiments, the structures of the positive terminal 112 and the negative terminal 122 can be interchanged. Specifically, the negative terminal 122 includes a first negative terminal plate segment 1221 and two second negative terminal plate segments 1222, the first negative terminal plate segment 1221 includes two first negative pole portions 12211 and one second negative pole portion 12212, the two first negative pole portions 12211 are arranged in a stack with the two second negative terminal plate segments 1222 respectively, and the second negative pole portion 12212 is used for connecting the power module; the positive terminal 112 includes a first positive terminal plate segment 1121 and a second positive terminal plate segment 1122, the first positive terminal plate segment 1121 includes one first positive pole portion 11211 and two second positive pole portions 11212, the first positive pole portion 11211 is arranged in a stack with the second positive terminal plate segment 1122, and the second positive pole portions 11212 are used for connecting the power module. Wherein, the second positive terminal plate segment 1122 is between the two second negative terminal plate segments 1222, the first positive pole portion 11211 is between the two first negative pole portions 12211, and the second negative pole portion 12212 is between the two second positive pole portions 11212.

[0081] Please refer to Figure 2 and Figure 3 In some embodiments, the first positive terminal plate segment 1121 further includes a third positive pole portion 11213 connecting the two first positive pole portions 11211 and the one second positive pole portion 11212, and the first negative terminal plate segment 1221 further includes a third negative pole portion 12213 connecting the one first negative pole portion 12211 and the two second negative pole portions 12212; the third positive pole portion 11213 is arranged in a stack with the third negative pole portion 12213.

[0082] The third positive pole portion 11213 connects the two first positive pole portions 11211 and the one second positive pole portion 11212, which can be understood as, in the width direction of the third positive pole portion 11213, the two first positive pole portions 11211 are on one side of the third positive pole portion 11213, and the second positive pole portion 11212 is on the other side of the third positive pole portion 11213.

[0083] The third negative pole portion 12213 connects the one first negative pole portion 12211 and the two second negative pole portions 12212, which can be understood as, in the width direction of the third negative pole portion 12213, the first negative pole portion 12211 is on one side of the third negative pole portion 12213, and the two second negative pole portions 12212 are on the other side of the third negative pole portion 12213.

[0084] The third positive electrode portion 11213 and the third negative electrode portion 12213 are arranged in a stacked manner, and it can be understood that a fourth insulating film is arranged between the third positive electrode portion 11213 and the third negative electrode portion 12213 to avoid direct contact between the third positive electrode portion 11213 and the third negative electrode portion 12213.

[0085] By arranging the third positive electrode portion 11213 and the third negative electrode portion 12213 in a stacked manner, the stray inductance in the circuit is further reduced.

[0086] Please refer to Figure 2 and Figure 3 In some embodiments, the third positive electrode portion 11213 is located on the side of the third negative electrode portion 12213 away from the negative electrode body 121, and the positive electrode body 111 is provided with a relief gap 11121 for avoiding the negative electrode terminal 122.

[0087] The size of the relief gap 11121 should meet the requirement that the negative electrode terminal 122 does not contact the side wall of the relief gap 11121 when passing through the relief gap 11121.

[0088] Optionally, the relief gap 11121 is arranged in a plurality of intervals along the X direction.

[0089] Optionally, the shape of the relief gap 11121 is rectangular.

[0090] Please refer to Figure 4 and Figure 5 In some embodiments, the positive electrode body 111 includes a first positive electrode body plate segment 1111 and a second positive electrode body plate segment 1112, the second positive electrode body plate segment 1112 is arranged in a stacked manner with the negative electrode body 121, and the first positive electrode body plate segment 1111 includes a first bending portion 11111 arranged in a stacked manner with the second positive electrode body plate segment 1112.

[0091] The second positive electrode body plate segment 1112 is connected to the positive electrode terminal 112.

[0092] Optionally, the free end of the first bending portion 11111 is welded to the end of the second positive electrode body plate segment 1112 away from the positive electrode terminal 112.

[0093] The first bending portion 11111 and the second positive electrode body plate segment 1112 are arranged in a stacked manner, which can be understood as that the first bending portion 11111 and the second positive electrode body plate segment 1112 are arranged in parallel or close to parallel, and a fifth insulating film is arranged between the first bending portion 11111 and the second positive electrode body plate segment 1112 to avoid direct contact between the first bending portion 11111 and the second positive electrode body plate segment 1112.

[0094] The current direction is as shown in Figure 5The direction of the arrow in the middle, that is, the current direction between the first bending part 11111 and the second positive electrode body plate segment 1112 is opposite, so as to reduce the stray inductance.

[0095] Please refer to Figure 8 The second aspect of the present application provides a capacitor 100. The capacitor 100 comprises a capacitor element 20 and a capacitor busbar 10 as the first aspect, and the capacitor busbar 10 wraps the capacitor element 20. Wherein, the capacitor element 20 can be provided in one or more rows, and each row of capacitor elements 20 is arranged along the X direction.

[0096] The capacitor 100 adopts any one or more of the above-mentioned embodiments of the capacitor busbar 10, and thus has the beneficial effects of the above-mentioned embodiments, which will not be repeated here.

[0097] The third aspect of the present application provides a power controller, which comprises a power module and a capacitor 100 as described in the second aspect, and the capacitor 100 connects the power module through the positive busbar 11 and the negative busbar 12. Wherein, the power controller can be a motor controller.

[0098] The power controller adopts any one or more of the above-mentioned embodiments of the capacitor 100, and thus has the beneficial effects of the above-mentioned embodiments, which will not be repeated here.

[0099] The fourth aspect of the present application provides a power equipment, which comprises a power controller as described in the third aspect. Wherein, the power equipment can be an electric vehicle.

[0100] The power equipment adopts any one or more of the above-mentioned embodiments of the power controller, and thus has the beneficial effects of the above-mentioned embodiments, which will not be repeated here.

[0101] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A capacitor busbar, characterized by, The capacitor busbar comprises: a positive busbar comprising a positive body and a positive terminal connected to the positive body; a negative busbar comprising a negative body and a negative terminal connected to the negative body; a part of the positive body and a part of the negative body are arranged in a stack; a part of the positive terminal is arranged in a stack, and / or a part of the negative terminal is arranged in a stack.

2. The capacitor busbar of claim 1, wherein, The positive terminal comprises a first positive terminal plate segment and a second positive terminal plate segment, a first end of the second positive terminal plate segment is fixedly connected to a first end of the first positive terminal plate segment, and a second end of the second positive terminal plate segment is connected to the positive body; the first positive terminal plate segment comprises a first positive part close to the first end of the first positive terminal plate segment, and the first positive part is arranged in a stack with the second positive terminal plate segment.

3. The capacitor busbar of claim 2, wherein, The second end of the second positive terminal plate segment is integrally connected to the positive body; or the positive terminal further comprises a third positive terminal plate segment connected to the second end of the second positive terminal plate segment, and the second end of the second positive terminal plate segment is fixedly connected to the positive body through the third positive terminal plate segment.

4. The capacitor busbar of claim 1, wherein, The negative terminal comprises a first negative terminal plate segment and a second negative terminal plate segment, a first end of the second negative terminal plate segment is fixedly connected to a first end of the first negative terminal plate segment, and a second end of the second negative terminal plate segment is connected to the negative body; the first negative terminal plate segment comprises a first negative part close to the first end of the first negative terminal plate segment, and the first negative part is arranged in a stack with the second negative terminal plate segment.

5. The busbar of claim 4, wherein, The second end of the second negative terminal plate segment is integrally connected to the negative body; or the negative terminal further comprises a third negative terminal plate segment connected to the second end of the second negative terminal plate segment, and the second end of the second negative terminal plate segment is fixedly connected to the negative body through the third negative terminal plate segment.

6. The capacitor busbar of claim 1, wherein: the positive terminal comprises a first positive terminal plate segment and two second positive terminal plate segments, the first positive terminal plate segment comprises two first positive parts and one second positive part, the two first positive parts are arranged in a stack with the two second positive terminal plate segments respectively, and the second positive part is used for connecting a power module; the negative terminal comprises a first negative terminal plate segment and a second negative terminal plate segment, the first negative terminal plate segment comprises one first negative part and two second negative parts, the first negative part is arranged in a stack with the second negative terminal plate segment, and the two second negative parts are used for connecting a power module; wherein the second negative terminal plate segment is between the two second positive terminal plate segments, the first negative part is between the two first positive parts, and the second positive part is between the two second negative parts.

7. The capacitor busbar of claim 6, wherein, The first positive terminal plate segment further comprises a third positive pole part connecting two first positive pole parts and one second positive pole part, and the first negative terminal plate segment further comprises a third negative pole part connecting one first negative pole part and two second negative pole parts; the third positive pole part and the third negative pole part are arranged in a laminated manner.

8. The capacitor busbar of claim 7, wherein, The third positive pole part is on a side of the third negative pole part away from the negative pole body, and the positive pole body is provided with an avoiding gap for avoiding the negative pole terminal.

9. The busbar of any one of claims 1-8, wherein, The positive pole body comprises a first positive pole body plate segment and a second positive pole body plate segment, the second positive pole body plate segment is arranged in a laminated manner with the negative pole body, and the first positive pole body plate segment comprises a first bending part arranged in a laminated manner with the second positive pole body plate segment.

10. A capacitor characterized by A capacitor comprising a capacitor element and a capacitor busbar as claimed in any one of claims 1-9, the capacitor busbar wrapping the capacitor element.

11. A power controller, characterized by A power module comprising a power capacitor as claimed in claim 10, the power capacitor connecting the power module via the capacitor busbar.

12. A power plant characterized by A power controller as claimed in claim 11.

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