Pad short-circuit structure, power supply circuit and smart meter

Abstract

The present application discloses a pad short-circuit structure, a power supply circuit and a smart meter, wherein the pad short-circuit structure includes at least one common pad, the common pad is used to connect voltage or ground; at least two functional pads, the functional pad is arranged adjacent to the common pad, the functional pad is used to connect to the common pad for short-circuiting; each of the functional pads is used to connect each corresponding power supply circuit, the functional pads correspond to the power supply circuits one by one, and each of the power supply circuits is connected to an input circuit or an output circuit in parallel. The present application can complete the short-circuit operation of multiple pad short-circuit points through a one-step operation process, the short-circuit operation process is relatively simple, and the product production efficiency is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit short-circuiting, and in particular to a pad short-circuiting structure, a power supply circuit and a smart electric meter. Background Art

[0002] At present, some electrical appliances (such as smart meters) require multiple power supplies to exist at the same time. For the sake of product production safety and product maintenance needs, before multiple power supplies enter the main circuit, for example, for two power supplies, the power supply circuits of the two power supplies usually have a two-pad short-circuit structure connected in series (a two-pad short-circuit structure refers to a pad short-circuit structure with two pad short-circuit points). Considering the safety of the product in the production process, the short-circuit operation of each pad short-circuit point is generally performed after the PCBA (Printed Circuit Board Assembly) inspection is completed and the post-installation station is entered. Since the power supply circuits of the two power supplies have been connected in series with a two-pad short-circuit structure respectively, it is necessary to short-circuit the two two-pad short-circuit structures separately, that is, the operation process needs to be carried out in two steps. Therefore, the short-circuit operation process of this structure is more troublesome, which affects the production efficiency of the product. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a pad short-circuiting structure, which can complete the short-circuiting operation of multiple pad short-circuiting points through a one-step operation process, and the short-circuiting operation process is relatively simple, which effectively improves the production efficiency of the product.

[0004] The present application also proposes a power supply circuit having the above pad short-circuit structure.

[0005] The present application also proposes a smart electric meter having the above power supply circuit.

[0006] The first aspect embodiment of the present application provides a pad short-circuiting structure, comprising: at least one common pad and at least two functional pads, the common pad being used to connect voltage or ground; the functional pad being arranged adjacent to the common pad, the functional pad being used to connect to the common pad for short-circuiting; each of the functional pads being used to connect each corresponding power supply circuit, the functional pads corresponding one to one to the power supply circuits, and each of the power supply circuits being connected in parallel to an input circuit or an output circuit.

[0007] One or more technical solutions provided in the embodiments of the present application have at least the following beneficial effects: the pad short-circuiting structure of the embodiments of the present application is provided with at least one common pad and at least two functional pads, and the common pad and the functional pad are arranged adjacent to each other. The advantage of such an arrangement is that since one functional pad corresponds to one power supply circuit, that is, there is a one-to-one correspondence between the power supply circuit and the functional pad. When it is necessary to short-circuit each power supply circuit (that is, each functional pad needs to be short-circuited), each functional pad can be connected to the common pad through one welding, and since the common pad is used to connect voltage or ground respectively, the power supply circuits can be short-circuited. Compared with the prior art that requires multiple operation procedures to short-circuit each pad short-circuit point, the short-circuiting operation procedure of the embodiments of the present application is simpler and can effectively improve product production efficiency.

[0008] According to some embodiments of the first aspect of the present application, the common pad and the functional pad are arranged side by side.

[0009] According to some embodiments of the first aspect of the present application, the common pads and the functional pads are arranged alternately, and the common pads are arranged between the functional pads.

[0010] The second aspect embodiment of the present application provides a power supply circuit, including: the pad short-circuiting structure according to the above-mentioned first aspect embodiment of the present application; at least two power supply circuits, each of the power supply circuits is respectively connected to each corresponding functional pad, and there is a one-to-one correspondence between the power supply circuits and the functional pads; each of the power supply circuits is connected in parallel to an input circuit or an output circuit.

[0011] One or more technical solutions provided in the embodiments of the present application have at least the following beneficial effects: the power supply circuit of the embodiments of the present application is provided with a pad short-circuiting structure and at least two power supply circuits as described in the first aspect embodiment above, and each functional pad in the pad short-circuiting structure is respectively connected to each power supply circuit, and each functional pad is respectively connected to a common pad for short-circuiting, so that each power supply circuit is short-circuited. Compared with the prior art method that requires multiple operation procedures to short-circuit each power supply circuit (i.e., each pad short-circuiting point), the embodiments of the present application can complete the short-circuiting of at least two power supply circuits through a one-step operation procedure, and the short-circuiting operation procedure is relatively simple, which effectively improves product production efficiency.

[0012] According to some embodiments of the second aspect of the present application, the power supply circuit includes a first power supply circuit and a second power supply circuit; the pad short-circuiting structure includes a common pad, a first functional pad and a second functional pad, the common pad is respectively arranged adjacent to the first functional pad and the second functional pad, and the first functional pad and the second functional pad are respectively used to be connected to the common pad for short-circuiting; the first power supply circuit is connected to the first functional pad, and the second power supply circuit is connected to the second functional pad.

[0013] According to some embodiments of the second aspect of the present application, the first power supply circuit is a battery power supply circuit, and the second power supply circuit is a farad capacitor power supply circuit.

[0014] According to some embodiments of the second aspect of the present application, the battery power supply circuit includes a first battery and a first diode, the positive electrode of the first battery is connected to the anode of the first diode, the negative electrode of the first battery is connected to the first functional pad, and the cathode of the first diode is connected to the farad capacitor power supply circuit in parallel to an input circuit or an output circuit.

[0015] According to some embodiments of the second aspect of the present application, the farad capacitor power supply circuit includes a first farad capacitor and a second diode, the positive electrode of the first farad capacitor is connected to the anode of the second diode, the negative electrode of the first farad capacitor is connected to the second functional pad, and the cathode of the second diode is connected to the input circuit or the output circuit in parallel with the battery power supply circuit.

[0016] According to some embodiments of the second aspect of the present application, the power supply circuit also includes a voltage stabilizing circuit; the battery power supply circuit and the farad capacitor power supply circuit are connected in parallel and then connected to the output circuit through the voltage stabilizing circuit.

[0017] The third aspect of the present application provides a smart meter, including: a power supply circuit according to the second aspect of the present application.

[0018] One or more technical solutions provided in the embodiments of the present application have at least the following beneficial effects: the smart electric meter in the embodiments of the present application can realize the short-circuiting operation of at least two power supply circuits (i.e., short-circuiting points of multiple pads) through a one-step short-circuiting operation process. Compared with the prior art, the short-circuiting operation process is simpler and effectively improves the product production efficiency.

[0019] Additional aspects and / or advantages of the present application 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 application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a circuit schematic diagram of a case where the power supply circuits of two power sources in the related art are both connected in series with a two-pad short-circuit structure;

[0022] Figure 2 It is a structural schematic diagram of a pad short-circuit structure provided by an embodiment of the first aspect of the present application;

[0023] Figure 3 It is a structural schematic diagram of a pad short-circuit structure provided by another embodiment of the first aspect of the present application;

[0024] Figure 4 It is a structural schematic diagram of a pad short-circuit structure provided by another embodiment of the first aspect of the present application;

[0025] Figure 5 It is a circuit diagram of a power supply circuit provided by an embodiment of the second aspect of the present application;

[0026] Figure 6 is a circuit diagram of a power supply circuit provided by another embodiment of the second aspect of the present application;

[0027] Figure 7 It is a circuit diagram of a power supply circuit provided in another embodiment of the second aspect of the present application.

[0028] Reference numerals:

[0029] Common pad 100, first common pad 101, second common pad 102; functional pad 110, first functional pad 111, second functional pad 112, third functional pad 113;

[0030] The first power supply circuit 200 and the battery power supply circuit 210 ; the second power supply circuit 300 and the farad capacitor power supply circuit 310 ; the rectifier circuit 400 ; the voltage stabilizing circuit 500 ; and the output circuit 600 . DETAILED DESCRIPTION

[0031] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0032] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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 application.

[0033] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there are words such as "first", "second", "third" etc. in the description, they are only used for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Reference Figure 1 , Figure 1 A circuit diagram showing a case where the power supply circuits of two power sources in the related art are respectively connected in series with a two-pad short-circuit structure. The power supply circuits of the two power sources are specifically a battery power supply circuit and a farad capacitor power supply circuit used in the related art, and the two two-pad short-circuit structures are respectively a first two-pad short-circuit structure J10 and a second two-pad short-circuit structure J20. Specifically, the battery power supply circuit in the related art includes a second battery BAT2, a first two-pad short-circuit structure J10 and a fourth diode D4, the negative electrode of the second battery BAT2 is grounded, the positive electrode of the second battery BAT2 is connected to one of the first two-pad short-circuit structure J10, and the other pad short-circuit point in the first two-pad short-circuit structure J10 is connected to the anode of the fourth diode D4; the farad capacitor power supply circuit in the related art includes a third farad capacitor E3, a second two-pad short-circuit structure J20 and a fifth diode D5, the negative electrode of the third farad capacitor E3 is grounded, the positive electrode of the third farad capacitor E3 is connected to one of the second two-pad short-circuit structure J20, the other pad short-circuit point in the second two-pad short-circuit structure J20 is connected to the anode of the fifth diode D5, and the cathode of the fourth diode D4 is connected in parallel with the cathode of the fifth diode D5 to output a voltage V BE, that is, the cathode of the fourth diode D4 and the cathode of the fifth diode D5 are connected in parallel to one end of the thirtieth resistor R30, and the other end of the thirtieth resistor R30 is connected to the output circuit. Figure 1 TP10 and TP20 in the figure are both test ports; Figure 1 V BE It indicates the output voltage value after the battery power supply circuit and the farad capacitor power supply circuit are connected in parallel. Figure 1 As shown, the battery power supply circuit is connected in series with a first two-pad short-circuit structure J10, and the farad capacitor power supply circuit is connected in series with a second two-pad short-circuit structure J20. The two two-pad short-circuit structures are at different positions of the PCB (Printed Circuit Board). Considering the safety of product production in the production process, generally after the PCBA inspection is completed and the post-installation station is entered, the two pad short-circuit points in each two-pad short-circuit structure will be short-circuited respectively, that is, two operating procedures are required to complete the short-circuit operation of the two two-pad short-circuit structures (i.e., the first two-pad short-circuit structure J10, the second two-pad short-circuit structure J20). In other related technologies, since it is usually necessary to uniformly disconnect or short-circuit the power supply circuit of each power supply, when the power supply circuits of three or more power supplies are respectively connected in series with a two-pad short-circuit structure, it is necessary to perform three or more operating procedures to complete the short-circuit operation of the power supply circuits of all power supplies, and the operating procedures are cumbersome and inefficient.

[0036] Based on this, the present application provides a pad short-circuiting structure, a power supply circuit and a smart meter, which can complete the short-circuiting operation of multiple pad short-circuiting points through a one-step operation process. The short-circuiting operation process is relatively simple and effectively improves product production efficiency.

[0037] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0038] Reference Figure 2The first aspect embodiment of the present application provides a pad short-circuiting structure, including: at least one common pad 100 and at least two functional pads 110, the functional pad 110 is arranged adjacent to the common pad 100, that is, the functional pad 110 is arranged adjacent to the common pad 100, and the functional pad 110 is used to connect to the common pad 100 for short-circuiting. The advantage of such a configuration is that since each functional pad 110 is used to connect each corresponding power supply circuit, that is, there is a one-to-one correspondence between the power supply circuit and the functional pad 110, and each power supply circuit is connected to the input circuit or the output circuit 600 in parallel, when it is necessary to short-circuit each power supply circuit (that is, each functional pad 110 needs to be short-circuited), each functional pad 110 can be connected to the common pad 100 through one welding, and since the common pad 100 is connected to voltage or ground, the short-circuit between each power supply circuit can be achieved. Compared with the prior art that requires multiple operation procedures to short-circuit each pad short-circuit point, the short-circuiting operation procedure of the technical solution of the present application is simpler and can effectively improve product production efficiency.

[0039] In the related art, before repairing the product, it is necessary to take multiple steps to find and disconnect the pad short-circuit points in each pad short-circuit structure, that is, it is necessary to go through multiple operation procedures to disconnect the pad short-circuit points in each pad short-circuit structure respectively before repair work can be carried out, so as to prevent the circuit from short-circuiting and damaging the product. Figure 1 When repairing the product, it is necessary to disconnect the two pad short-circuit points in the two-pad short-circuit structure in two steps before the product repair work can be carried out. The operation process is cumbersome and time-consuming.

[0040] The embodiment of the present application can directly disconnect the connection between each functional pad 110 and the common pad 100 in the pad short-circuiting structure without affecting the need for product maintenance, thereby quickly disconnecting the short circuit between each power supply circuit, so as to facilitate product maintenance, thereby preventing circuit short circuit from damaging the product and effectively saving operating procedures.

[0041] It can be understood that when the common pad 100 is connected to a voltage, each power supply circuit is connected in parallel to the input circuit; or, when the common pad 100 is grounded, each power supply circuit is connected in parallel to the output circuit 600.

[0042] It can be understood that the power supply circuit is the power supply circuit of the power supply, and the power supply can be an external power supply or an internal power supply, such as a battery, a farad capacitor, etc.

[0043] It can be understood that the common pad 100 and the functional pad 110 are arranged side by side.

[0044] For example, when a common pad 100 and two functional pads 110 are provided, the two functional pads 110 are provided as a first functional pad 111 and a second functional pad 112, and the first functional pad 111 is used to connect to the first power supply circuit 200, and the second functional pad 112 is used to connect to the second power supply circuit 300. At this time, the arrangement order between the common pad 100 and the first functional pad 111 and the second functional pad 112 can be: common pad 100, first functional pad 111, second functional pad 112; or Figure 3 As shown, a first functional pad 111, a common pad 100, a second functional pad 112, etc.;

[0045] For another example, when two common pads 100 and three functional pads 110 are provided, the arrangement order between the two common pads 100 and the three functional pads 110 may be: Figure 4 As shown, a first functional pad 111 , a first common pad 101 , a second functional pad 112 , a second common pad 102 , a third functional pad 113 , and so on.

[0046] It is understandable that the common pads 100 and the functional pads 110 are arranged side by side and alternately arranged, and the common pads 100 are arranged between the functional pads 110. In the present embodiment, in order to facilitate the short-circuiting of the pad short-circuiting structure, each functional pad 110 arranged side by side can be short-circuited with the common pad 100 by one welding, and an odd number of pads are usually set. For example, 3 or 5 or 7 pads are set, that is, one common pad 100 and two functional pads 110; or two common pads 100 and three functional pads 110; or three common pads 100 and four functional pads 110, etc. It is understandable that the number of functional pads 110 is usually set to be one more than the number of common pads 100, and both sides located on the outside are set to functional pads 110. It is understandable that by setting it in this way, it is also convenient for the staff to find and identify the position of the functional pads 110. For example, by providing a functional pad 110 on both sides of the outer side, it is convenient for the staff to quickly identify the position of the functional pad 110, and because the common pad 100 and the functional pad 110 are arranged side by side and alternately provided, it is convenient for the staff to further identify the position of the common pad 100. When repairing the product, by disconnecting the connection between the functional pad 110 and the common pad 100, the short circuit between the power supply circuits can be quickly disconnected, thereby facilitating the repair of the product and effectively saving operating procedures.

[0047] In some embodiments, an even number of pads may be provided, such as two common pads 100 and two functional pads 110 , where the common pads 100 and the functional pads 110 are arranged side by side and alternately provided. The above embodiments are not limited thereto and will not be described in detail.

[0048] Since each common pad 100 is used to connect voltage or to ground, each functional pad 110 is used to connect each corresponding power supply circuit, and each power supply circuit is connected to the same input circuit or output circuit 600 in parallel. By arranging the common pad 100 and the functional pad 110 side by side, and the common pad 100 and the functional pad 110 are arranged adjacent to each other, when each power supply circuit needs to be short-circuited, each functional pad 110 arranged side by side can be connected to the common pad 100 by one welding, thereby realizing short-circuiting between each power supply circuit. The operation process is simple and the product production efficiency is effectively improved.

[0049] It can be understood that the pad short-circuit structure of the embodiment of the present application may include: M common pads 100 (where M≥1) and N functional pads 110 (where N≥2; in some embodiments, M+1=N). Specifically, each common pad 100 and each functional pad 110 are arranged side by side and at intervals; and the common pads 100 are arranged between the functional pads 110, that is, a functional pad 110 is arranged on both sides of the outer side. For example, when two common pads 100 and three functional pads 110 are provided, the arrangement order between the two common pads 100 and the three functional pads 110 can be: first functional pad 111, first common pad 101, second functional pad 112, second common pad 102, third functional pad 113. The advantage of such a setting is that when only a certain power supply circuit needs to be short-circuited, it is only necessary to find the functional pad 110 corresponding to the power supply circuit, and directly short-circuit the functional pad 110 with the common pad 100 adjacent to the functional pad 110, so as to achieve the short-circuit of the power supply circuit corresponding to the functional pad 110, and the operation process is flexible and simple. In addition, when each power supply circuit needs to be short-circuited, each functional pad 110 in the pad short-circuit structure can be connected to the common pad 100 directly through a short-circuit operation. Compared with the prior art, the pad short-circuit structure of the embodiment of the present application can simultaneously complete the short-circuit of N pad short-circuit points (i.e., N functional pads 110) through a short-circuit operation process. Compared with the prior art, N-1 (N≥2) short-circuit operation processes are saved, effectively improving the production efficiency of the product.

[0050] The second aspect embodiment of the present application provides a power supply circuit, including: a pad short-circuiting structure according to the first aspect embodiment of the present application and at least two power supply circuits, wherein the pad short-circuiting structure includes at least one common pad 100 and at least two functional pads 110; the common pad 100 is used to connect voltage or ground, the functional pad 110 is arranged adjacent to the common pad 100, and the functional pad 110 is used to connect to the common pad 100 for short-circuiting; each power supply circuit is respectively connected to each corresponding functional pad 110, and there is a one-to-one correspondence between the power supply circuit and the functional pad 110; each power supply circuit is connected to the input circuit or the output circuit 600 in parallel.

[0051] It can be understood that the power circuit of the embodiment of the present application connects each functional pad 110 in the pad short-circuiting structure to each corresponding power supply circuit. When each power supply circuit needs to be short-circuited, each functional pad 110 only needs to be connected to the common pad 100 by welding once, and since the common pad 100 is connected to voltage or ground, the short-circuit between each power supply circuit can be achieved. Compared with the method in the prior art that requires multiple operation procedures to short-circuit the pad short-circuit points of each power supply circuit, the short-circuit operation procedure of the technical solution of the present application is simpler, and the short-circuit between at least two power supply circuits can be completed through a single short-circuit operation procedure, effectively improving the production efficiency of the product.

[0052] It can be understood that when performing product maintenance, compared with the related art which requires multiple steps to find and then disconnect the pad short-circuit points in each pad short-circuit structure, the present application can directly disconnect the connection between each functional pad 110 and the common pad 100 in the pad short-circuit structure, thereby quickly disconnecting the short circuit between each power supply circuit, so as to facilitate product maintenance, thereby preventing circuit short circuits from damaging the product and effectively saving operating procedures.

[0053] It can be understood that the power supply circuit may include K power supply circuits (where K≥2), each power supply circuit shares a pad short-circuiting structure, and the pad short-circuiting structure includes N functional pads 110 (where N≥2 and K=N) and M common pads 100 (where M≥1 and M+1=N), the common pad 100 is used to connect voltage or ground, and each functional pad 110 is respectively connected to each corresponding power supply circuit, the functional pads 110 and the common pads 100 are arranged side by side and alternately arranged, and each common pad 100 needs to be arranged between the functional pads 110, that is, the two outer sides need to be set as functional pads 110; the functional pads 110 are used to connect to the common pads 100 for short-circuiting. When K power supply circuits are connected in parallel to the input circuit or the output circuit 600 and each power supply circuit needs to be short-circuited, the power supply circuit of the embodiment of the present application can short-circuit each functional pad 110 arranged side by side and the common pad 100 through one short-circuiting operation process to complete the short-circuiting of multiple power supply circuits. Compared with the prior art, N-1 short-circuiting operation processes are saved, and the production cost of N-1 short-circuiting operation processes is saved, thereby effectively improving product production efficiency.

[0054] Reference Figure 5It can be understood that the power supply circuit of the embodiment of the present application may include a first power supply circuit 200 and a second power supply circuit 300. The pad short-circuit structure of the embodiment of the present application can be set as a three-pad short-circuit structure J1. The three-pad short-circuit structure J1 includes a common pad 100 and two functional pads 110. Specifically, the two functional pads 110 are respectively set as a first functional pad 111 and a second functional pad 112; the common pad 100 is respectively arranged adjacent to the first functional pad 111 and the second functional pad 112, the common pad 100 is used for grounding, and the first functional pad 111 and the second functional pad 112 are respectively used to connect to the common pad 100 for short-circuiting. Specifically, the first power supply circuit 200 is connected to the first functional pad 111 correspondingly, the second power supply circuit 300 is connected to the second functional pad 112 correspondingly, and the first power supply circuit 200 and the second power supply circuit 300 are also connected to the input circuit (not shown in the figure) or the output circuit 600 in parallel. The purpose of such a setting is to be able to connect the first function pad 111 and the second function pad 112 to the common pad 100 by welding once, so that the first power supply circuit 200 and the second power supply circuit 300 are short-circuited, the operation process is simple, and the product production efficiency is effectively improved. In addition, when repairing the product, compared with the related art that requires multiple steps to find and then disconnect the pad short-circuit points in each pad short-circuit structure, the present application can directly disconnect the connection between the two function pads 110 (i.e., the first function pad 111 and the second function pad 112) in the pad short-circuit structure and the common pad 100, thereby disconnecting the short circuit between the first power supply circuit 200 and the second power supply circuit 300, so as to facilitate the repair of the product, thereby preventing the circuit from being damaged by a short circuit, and effectively saving the operation process.

[0055] Reference Figure 5In some embodiments, the common pad 100 and the first function pad 111 and the second function pad 112 are arranged side by side and alternately arranged, and the common pad 100 is arranged between the first function pad 111 and the second function pad 112. The purpose of such arrangement is that, on the one hand, when only the first power supply circuit 200 (or the second power supply circuit 300) needs to be short-circuited, it is only necessary to directly short-circuit the first function pad 111 (or the second function pad 112) connected to the first power supply circuit 200 (or the second function pad 112 connected to the second power supply circuit 300) and the adjacent common pad 100, so that the first power supply circuit 200 (or the second power supply circuit 300) can be short-circuited, and the operation process is simple. On the other hand, when both the first power supply circuit 200 and the second power supply circuit 300 need to be short-circuited, the first function pad 111, the common pad 100 and the second function pad 112 in the pad short-circuiting structure can be directly connected through a single short-circuiting operation, thereby achieving short-circuiting of the first power supply circuit 200 and the second power supply circuit 300. Compared with the prior art method that requires two operation procedures to short-circuit the pad short-circuit points of the two power supply circuits respectively, the short-circuiting operation procedure of the technical solution of the present application is simpler and saves one short-circuiting operation procedure, effectively improving product production efficiency.

[0056] Reference Figure 6 It can be understood that the first power supply circuit 200 is a battery power supply circuit 210, and the second power supply circuit 300 is a farad capacitor power supply circuit 310. That is, the battery power supply circuit 210 is connected to the first function pad 111, and the farad capacitor power supply circuit 310 is connected to the second function pad 112. In some embodiments, the battery power supply circuit 210 and the farad capacitor power supply circuit 310 are also connected to the output circuit 600 in parallel, and the common pad 100 is used for grounding. Different types of power supply circuits can be set according to product requirements. The embodiment of the present application adopts two types of battery power supply circuits 210 and farad capacitor power supply circuits 310. In other embodiments, other types of power supply circuits can also be used, without being limited to this implementation, and will not be repeated here.

[0057] It can be understood that the battery power supply circuit 210 includes a first battery BAT1 and a first diode D1, the positive electrode of the first battery BAT1 is connected to the anode of the first diode D1, the negative electrode of the first battery BAT1 is connected to the first functional pad 111, the cathode of the first diode D1 and the farad capacitor power supply circuit 310 are connected in parallel to the input circuit or the output circuit 600, and the farad capacitor power supply circuit 310 is connected to the second functional pad 112. The embodiment of the present application specifically adopts the first battery BAT1 as a power source, and the battery power supply circuit 210 is provided for power supply.

[0058] It can be understood that the farad capacitor power supply circuit 310 includes a first farad capacitor E1 and a second diode D2, the positive electrode of the first farad capacitor E1 is connected to the anode of the second diode D2, the negative electrode of the first farad capacitor E1 is connected to the second functional pad 112, the cathode of the second diode D2 is connected to the input circuit or the output circuit 600 in parallel with the battery power supply circuit 210, and the battery power supply circuit 210 is connected to the first functional pad 111. The embodiment of the present application specifically adopts the first farad capacitor E1 as a power source, and the farad capacitor power supply circuit 310 is provided for power supply.

[0059] In some embodiments, when the common pad 100 is used for grounding, the battery power supply circuit 210 and the farad capacitor power supply circuit 310 can be connected in parallel to the output circuit 600 .

[0060] Specifically, Figure 6 As shown, the battery power supply circuit 210 includes a first battery BAT1 and a first diode D1; the farad capacitor power supply circuit 310 includes a first farad capacitor E1 and a second diode D2; the positive electrode of the first battery BAT1 is connected to the anode of the first diode D1, the positive electrode of the first farad capacitor E1 is connected to the anode of the second diode D2, and the cathode of the first diode D1 and the cathode of the second diode D2 are connected in parallel to the output circuit 600; the negative electrode of the first battery BAT1 is connected to the first function pad 111, and the negative electrode of the first farad capacitor E1 is connected to the second function pad 112; the common pad 100 and the first function pad 111 and the second function pad 112 are arranged side by side and the common pad 100 is arranged between the first function pad 111 and the second function pad 112; the common pad 100 is grounded, and the first function pad 111 and the second function pad 112 are respectively used to be connected to the common pad 100 for short circuit.

[0061] like Figure 6 As shown, it can be understood that the power supply circuit also includes a fourth resistor R4 and a fifth resistor R5, one end of the fourth resistor R4 is grounded through the fifth resistor R5, and the other end of the fourth resistor R4 is connected between the positive electrode of the first battery BAT1 and the anode of the first diode D1.

[0062] It is understandable that the power supply circuit further includes a voltage stabilizing circuit 500; the battery power supply circuit 210 and the farad capacitor power supply circuit 310 are connected in parallel and then connected to the output circuit 600 through the voltage stabilizing circuit 500. In some embodiments, the common pad 100 is grounded.

[0063] Reference Figure 7The power supply circuit also includes a voltage stabilizing circuit 500, and the voltage stabilizing circuit 500 can keep the output voltage basically unchanged when its input voltage fluctuates or the load changes. The voltage stabilizing circuit 500 includes a voltage stabilizing chip U1, a first capacitor C1, a second capacitor C2 and a second farad capacitor E2, the input terminal Vin of the voltage stabilizing chip U1 is connected to the cathode of the second diode D2 and the cathode of the first diode D1 through a third resistor R3, the input terminal Vin of the voltage stabilizing chip U1 is also connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded; the ground terminal VSS of the voltage stabilizing chip U1 is grounded, and the output terminal Vout of the voltage stabilizing chip U1 is connected to the output circuit 600; the second power supply VCC is connected between the output terminal Vout of the voltage stabilizing chip U1 and the output circuit 600; one end of the second farad capacitor E2 is connected between the output terminal Vout of the voltage stabilizing chip U1 and the second power supply VCC, and the other end of the second farad capacitor E2 is grounded; one end of the second capacitor C2 is connected between one end of the second farad capacitor E2 and the second power supply VCC, and the other end of the second capacitor C2 is grounded.

[0064] Reference Figure 7 It can be understood that the power supply circuit can also include a rectifier circuit 400. The rectifier circuit 400 includes a common anode diode D3, a first resistor R1 and a second resistor R2. The common anode diode D3 is low-level driven and consumes less current. Since it basically does not affect the power supply efficiency, it can reduce the consumption of useless work. Specifically, the anode of the common anode diode D3 is connected to the first power supply, the first cathode of the common anode diode D3 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the positive electrode of the first farad capacitor E1 and the anode of the second diode D2, and the second resistor R2 is connected in parallel with the first resistor R1; the second cathode of the common anode diode D3 is connected to the cathode of the second diode D2 and the cathode of the first diode D1 through the third resistor R3.

[0065] It can be understood that TP1, TP2, and TP3 are all test ports.

[0066] A third aspect of the present application provides a smart meter, comprising a power supply circuit according to the second aspect of the present application.

[0067] In some embodiments, the smart meter includes a pad short-circuiting structure and a power supply circuit; the pad short-circuiting structure includes at least one common pad 100 and at least two functional pads 110, and the common pad 100 is used for grounding; the functional pads 110 are arranged adjacent to the common pad 100, and the functional pads 110 are used to be connected to the common pad 100 for short-circuiting; the power supply circuit includes at least two power supply circuits, each power supply circuit is respectively connected to each corresponding functional pad 110, and there is a one-to-one correspondence between the power supply circuits and the functional pads 110; each power supply circuit is connected to the output circuit 600 in parallel.

[0068] In some embodiments, each power supply circuit is connected in parallel to an input terminal of the voltage stabilizing circuit 500 , and an output terminal of the voltage stabilizing circuit 500 is connected to the output circuit 600 .

[0069] In some embodiments, the functional pads 110 and the common pads 100 may be arranged side by side and alternately disposed.

[0070] It is understandable that the smart meter of the embodiment of the present application includes a pad short-circuit structure and a power supply circuit. The power supply circuit may include multiple power supply circuits such as a battery power supply circuit 210 and a farad capacitor power supply circuit 310, and a common connection point is provided between each power supply circuit, that is, each power supply circuit is connected in parallel to achieve a converged connection, and a voltage is jointly output to the output circuit 600, so as to provide power for other devices in the smart meter. It is understandable that, since in a certain link of the production process, the battery power supply circuit 210 and the farad capacitor power supply circuit 310 are required to work without power, the purpose is to protect the devices in the power supply circuit, that is, at this time, the battery power supply circuit 210 and the farad capacitor power supply circuit 310 need to be disconnected, so that the battery power supply circuit 210 and the farad capacitor power supply circuit 310 are not charged; and after the PCBA inspection is completed and enters the post-installation station, the pad short-circuit structure needs to be short-circuited.

[0071] The embodiment of the present application can complete the short-circuiting of at least two power supply circuits through a single short-circuiting operation process. Compared with the prior art, it saves N-1 short-circuiting operation processes and effectively improves product production efficiency. When repairing the smart meter, the present application can directly disconnect the connection between each functional pad 110 and the common pad 100 in the pad short-circuiting structure, thereby disconnecting the short circuit between multiple power supply circuits, so as to facilitate the repair of the smart meter, thereby preventing the circuit from being damaged due to a short circuit.

[0072] In addition, since the smart meter in the embodiment of the present application is provided with the power supply circuit of the above-mentioned second aspect embodiment, the smart meter has the beneficial effects and functional characteristics brought by any one of the above-mentioned power supply circuits.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specifically", 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 present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0074] Although the embodiments of the present application 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 purpose of the present application, and all should be included in the scope of protection of the present application.

Claims

1. A power supply circuit, characterized in that: include: Pad short circuit structure; At least two power supply circuits; The pad short-circuit structure comprises: At least one common pad, the common pad being used to connect voltage or ground; At least two functional pads, the functional pads are arranged adjacent to the common pad, and the functional pads are used to be connected to the common pad for short circuit; each of the functional pads is used to connect to each corresponding power supply circuit, the functional pads correspond to the power supply circuits one by one, and each of the power supply circuits is connected to the input circuit or the output circuit in parallel; Each of the power supply circuits is respectively connected to each corresponding functional pad, and there is a one-to-one correspondence between the power supply circuits and the functional pads; each of the power supply circuits is connected to an input circuit or an output circuit in parallel.

2. The power supply circuit according to claim 1, characterized in that: The common pads are arranged side by side with the functional pads.

3. The power supply circuit according to claim 2, characterized in that: The common pads and the functional pads are arranged alternately, and the common pads are arranged between the functional pads.

4. The power supply circuit according to claim 1, characterized in that: The power supply circuit includes a first power supply circuit and a second power supply circuit; the pad short-circuiting structure includes a common pad, a first functional pad and a second functional pad, the common pad is respectively arranged adjacent to the first functional pad and the second functional pad, the first functional pad and the second functional pad are respectively used to be connected to the common pad for short-circuiting; the first power supply circuit is connected to the first functional pad, and the second power supply circuit is connected to the second functional pad.

5. The power supply circuit according to claim 4, characterized in that: The first power supply circuit is a battery power supply circuit, and the second power supply circuit is a farad capacitor power supply circuit.

6. The power supply circuit according to claim 5, characterized in that: The battery power supply circuit includes a first battery and a first diode, the positive electrode of the first battery is connected to the anode of the first diode, the negative electrode of the first battery is connected to the first functional pad, and the cathode of the first diode is connected to the input circuit or the output circuit in parallel with the farad capacitor power supply circuit.

7. The power supply circuit according to claim 5, characterized in that: The farad capacitor power supply circuit includes a first farad capacitor and a second diode, the positive electrode of the first farad capacitor is connected to the anode of the second diode, the negative electrode of the first farad capacitor is connected to the second functional pad, and the cathode of the second diode is connected to the input circuit or the output circuit in parallel with the battery power supply circuit.

8. The power supply circuit according to any one of claims 5 to 7, characterized in that: The power supply circuit also includes a voltage stabilizing circuit; the battery power supply circuit and the farad capacitor power supply circuit are connected in parallel and then connected to the output circuit through the voltage stabilizing circuit.

9. A smart electric meter, characterized in that: include: A power supply circuit as claimed in any one of claims 1 to 8.

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