Charging circuit of module power supply, energy storage device and electric equipment

Abstract

The utility model provides a charging circuit of a module power supply, an energy storage device and electric equipment. One end of a positive pole branch of the charging circuit is connected with a positive pole of the module power supply, and the other end is connected with a socket; one end of the cathode branch is connected with the cathode of the module power supply, and the other end is connected with the socket; the charging capacitor is connected between the positive electrode and the negative electrode of the module power supply; one end of the pre-charging branch circuit is connected to the positive branch circuit and / or the negative branch circuit, the other end of the pre-charging branch circuit is used for being connected with a socket, and the pre-charging branch circuit is configured to form a pre-charging loop with the system bus and charge the charging capacitor before the positive branch circuit, the negative branch circuit and the system bus form the charging loop; before formal charging, the charging capacitor is charged through the pre-charging branch, so that the voltage on the charging capacitor is equal to the system bus voltage, the reduction of the voltage difference between the module power supply and the system socket is facilitated, and the reduction of the plugging arc is further facilitated.

Description

Technical Field

[0001] This application belongs to the technical field of power charging, and particularly relates to a charging circuit for a modular power supply, an energy storage device, and an electrical device. Background Art

[0002] As a key component for power conversion and distribution, modular power supplies are widely used in various electronic devices and systems. Traditional modular power supply designs often focus on improving conversion efficiency, reducing volume, and optimizing heat dissipation, etc., but the instantaneous protection mechanism when the power supply is connected to the system is relatively weak.

[0003] In the related art, when a power module is connected to a system, if there are already modules in the system that have output voltage and stabilized on the bus, and then the subsequently connected module has not undergone sufficient pre-charging processing, when its output port contacts the system socket or the switch closes instantaneously, an arcing phenomenon will occur due to the excessive voltage drop, which will further reduce the service life of the charging device.

[0004] Therefore, how to reduce the arcing phenomenon generated when connecting a modular power supply is a problem that needs to be solved by those skilled in the art at present. Summary of the Utility Model

[0005] The purpose of this application is to provide a charging circuit for a modular power supply, an energy storage device, and an electrical device, aiming to solve the problem of frequent arcing phenomena generated when connecting a modular power supply in the traditional technology.

[0006] A first aspect of an embodiment of this application provides a charging circuit for a modular power supply. One side is used to connect to the system bus through a socket, and the other side is used to connect to the modular power supply. The charging circuit includes:

[0007] A positive branch, one end of the positive branch is used to connect to the positive pole of the modular power supply, and the other end is used to connect to the socket;

[0008] A negative branch, one end of the negative branch is used to connect to the negative pole of the modular power supply, and the other end is used to connect to the socket;

[0009] A charging capacitor, which is used to connect between the positive pole and the negative pole of the modular power supply;

[0010] A pre-charging branch, one end of the pre-charging branch is connected to the positive branch and / or the negative branch, and the other end is used to connect to the socket. And the pre-charging branch is configured to form a pre-charging loop with the system bus first and charge the charging capacitor before the positive branch, the negative branch, and the system bus form a charging loop.

[0011] In some embodiments of the present application, the resistance value of the pre-charge circuit is greater than that of the charging circuit.

[0012] In some embodiments of the present application, the pre-charge branch includes a pre-charge resistor, and the pre-charge resistor is used to increase the resistance value of the pre-charge circuit.

[0013] In some embodiments of the present application, the pre-charge branch further includes a pre-charge diode. The positive electrode of the pre-charge diode is used to connect to the positive electrode of the system bus through the socket, or the negative electrode of the pre-charge diode is used to connect to the negative electrode of the system bus through the socket.

[0014] In some embodiments of the present application, the pre-charge branch includes a first pin for connecting to the socket, and the positive electrode branch and / or the negative electrode branch are both provided with a second pin for connecting to the socket. The protruding length of the first pin is greater than that of the second pin, so that during the process of connecting the charging circuit to the socket, the pre-charge branch is connected to the socket prior to the positive electrode branch and the negative electrode branch.

[0015] In some embodiments of the present application, the pre-charge branch includes a first part connected to the positive electrode branch and a second part connected to the negative electrode branch. The first pin includes a first sub-pin provided on the first part and a second sub-pin provided on the second part, and the lengths of the first sub-pin and the second sub-pin are both greater than that of the second pin.

[0016] In some embodiments of the present application, the pre-charge branch is connected to the positive electrode branch, and the positive electrode branch includes a first switching element, and the first switching element is configured to be disconnected during the process of plugging the charging circuit into the socket and to be closed after the charging capacitor finishes energy storage;

[0017] And / or, the pre-charge branch is connected to the negative electrode branch, and the negative electrode branch includes a second switching element, and the second switching element is configured to be disconnected during the process of connecting the charging circuit to the socket and to be closed after the charging capacitor finishes energy storage.

[0018] In some embodiments of the present application, a fuse is provided between the positive electrode branch and the module power supply;

[0019] And / or a fuse is provided between the negative electrode branch and the module power supply.

[0020] In a second aspect, the present application further provides an energy storage device, including the above-mentioned charging circuit and module power supply. The charging circuit is used to connect to the system bus and charge the module power supply.

[0021] In a third aspect, the present application further provides an electrical device, including the above energy storage device.

[0022] The beneficial effects of the embodiments of the present utility model compared with the prior art are as follows: For the above charging circuit, energy storage device and electrical device of a modular power supply, one side is used to connect to the system bus through a socket, and the other side is used to connect to the modular power supply. The charging circuit includes a positive branch, a negative branch, a charging capacitor and a pre-charge branch. One end of the positive branch is used to connect to the positive pole of the modular power supply, and the other end is used to connect to the socket; one end of the negative branch is used to connect to the negative pole of the modular power supply, and the other end is used to connect to the socket; the charging capacitor is used to connect between the positive pole and the negative pole of the modular power supply; one end of the pre-charge branch is connected to the positive branch and / or the negative branch, and the other end is used to connect to the socket, and the pre-charge branch is configured to form a pre-charge loop with the system bus before the positive branch and the negative branch form a charging loop with the system bus, and charge the charging capacitor; that is, before formal charging, the charging capacitor is charged through the pre-charge branch first, so that the voltage on the charging capacitor reaches the same as the system bus voltage, which is beneficial to reducing the voltage drop between the modular power supply and the system socket, and further beneficial to reducing the generation of plugging arcs, so as to play a role in protecting the port. Description of the Drawings

[0023] Figure 1 It is the main power full-bridge LLC topology circuit diagram provided by an embodiment of the present application;

[0024] Figure 2 It is the frame structure schematic diagram of the charging circuit of the modular power supply provided by an embodiment of the present application;

[0025] Figure 3 It is the circuit structure schematic diagram of the charging circuit of the modular power supply provided by an embodiment of the present application;

[0026] Figure 4 It is the circuit structure schematic diagram of the charging circuit of the modular power supply provided by another embodiment of the present application;

[0027] Figure 5 It is the circuit structure schematic diagram of the charging circuit of the modular power supply provided by another embodiment of the present application;

[0028] Figure 6 It is another circuit structure schematic diagram of the charging circuit of the modular power supply provided by another embodiment of the present application.

[0029] Specific element symbol descriptions: 100 - module power supply, 200 - charging circuit, 210 - positive branch, 220 - negative branch, 230 - charging capacitor, 240 - pre - charging branch, 300 - socket, 400 - system bus, F1 - fuse, D5 - pre - charging diode, R4 - pre - charging resistor, RLY1 - regulating switch. Specific implementation manners

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0031] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to this application.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "plural" means two or more, unless otherwise specifically defined.

[0034] It should be known that in the field of power electronics, module power supplies, as key components for power conversion and distribution, are widely used in various electronic devices and systems, especially in occasions that require high reliability, high integration and flexible configuration, such as data centers, communication base stations, industrial automation, etc. Traditional module power supply designs often focus on improving conversion efficiency, reducing volume and optimizing heat dissipation, etc., but the instantaneous protection mechanism in the power access system is relatively weak. Common power access methods include directly connecting the output end of the power module to the system bus through a connecting wire, or adopting a fixed pin (socket) design, allowing the module power supply to be quickly connected to the system in a plug - and - play manner. Although these methods simplify the system wiring and module replacement process, there are potential safety hazards when facing the actual situation of non - synchronous startup or inconsistent output voltages of multiple module power supplies in the system.

[0035] However, traditional module power supply designs have significant technical deficiencies in the pre-charge function. First, many module power supply products do not have a dedicated pre-charge mechanism, or only provide very simple pre-charge measures, and their reliability is difficult to guarantee. When a power module is connected to the system, if there are already modules in the system that have output voltage and stabilized on the bus, and the subsequently connected module has not undergone sufficient pre-charge processing, when its output port contacts the system socket or the switch closes instantaneously, arcing will occur due to the excessive voltage drop. This arcing will not only damage the contact surface, shorten the service life of the terminals, but may also cause electrical faults and affect the stable operation of the entire system. In addition, as the system scale expands and the number of modules increases, the problem of asynchronous startup becomes more prominent, making the module power supply under traditional designs face greater challenges and risks when connected to the system.

[0036] Specifically, in previous module power supply products, the pre-charge function was not designed, or if there was one, it was very simple and its reliability was extremely low. There are two ways to connect the power supply to the system. One is to directly connect the outputs of each power module on the parallel system to the bus terminals through connecting wires; the other way is that the power output uses fixed pins (sockets), and when needed, the module power supply can be directly inserted into the system socket. In either case, it is impossible for the module power supplies in the system to output voltage at the same time and in the same order. When the power supply socket port of the later output contacts or the switch closes, arcing will occur, and the arcing of the contact surface is caused by the voltage drop, resulting in the shortening of the terminal life.

[0037] Therefore, based on this, the present application has improved the charging circuit, energy storage device and electrical equipment of the relevant module power supply.

[0038] Please refer to Figure 1 , Figure 1 which shows the main power full-bridge LLC topology circuit diagram provided in this embodiment. Figure 1 It includes electrolytic capacitor C3, primary-side full-bridge power switch tubes Q1, Q2, Q3, Q4, resonant inductors L1, L2, resonant capacitors C1, C2, main transformers T1, T2, secondary-side full-bridge rectifier diodes D1, D2, D3, D4, and output filter electrolytic capacitor C4. After the module power supply is turned on, it is mainly powered by the output of the main power full-bridge LLC topology circuit to charge the filter electrolytic capacitor, and the output power is then transmitted to the output terminal to be provided to the system.

[0039] Please refer to Figure 2 , Figure 2The figure shows a schematic diagram of the framework structure of the charging circuit 200 of the modular power supply 100 provided in this embodiment. One side of the charging circuit 200 of the modular power supply 100 in this embodiment is used to connect to the system bus 400 through the socket 300, and the other side is used to connect to the modular power supply 100. The charging circuit 200 includes a positive branch 210, a negative branch 220, a charging capacitor 230, and a pre-charging branch 240. One end of the positive branch 210 is used to connect to the positive pole of the modular power supply 100, and the other end is used to connect to the socket 300; one end of the negative branch 220 is used to connect to the negative pole of the modular power supply 100, and the other end is used to connect to the socket 300; the charging capacitor 230 is used to connect between the positive pole and the negative pole of the modular power supply 100; one end of the pre-charging branch 240 is connected to the positive branch 210 and / or the negative branch 220, and the other end is used to connect to the socket 300, and the pre-charging branch 240 is configured to form a pre-charging loop with the system bus 400 and charge the charging capacitor 230 before the positive branch 210 and the negative branch 220 form a charging loop with the system bus 400.

[0040] It should be noted that the positive branch 210 and the negative branch 220 are respectively connected to the positive and negative poles of the modular power supply 100 and the socket 300, constituting the main loop of the charging circuit 200. Through these two branches, the system bus 400 can provide electrical energy for the modular power supply 100 or the modular power supply 100 can provide electrical energy for the system bus 400. The charging capacitor 230 is connected between the positive and negative poles of the modular power supply 100, and its main functions are filtering and energy storage. During the charging process, it can smooth the current fluctuation and release the stored electrical energy when needed, which helps to stabilize the working voltage of the modular power supply 100. Before the system bus 400 is directly connected to the positive and negative branches 220 of the modular power supply 100, the charging capacitor 230 is pre-charged through the pre-charging branch 240 first. This can gradually increase the voltage across the capacitor to make it close to the voltage level of the system bus 400, thus avoiding the instantaneous large current impact caused by direct connection and protecting the system bus 400 and the modular power supply 100. The pre-charging branch 240 may include a current-limiting resistor or other current-limiting components to control the current magnitude during the pre-charging process and ensure safe charging.

[0041] In the current charging circuit 200 of the modular power supply 100, arcing will occur when the port of the later-output power socket 300 contacts or the switch closes, which greatly affects the service life of the charging device. However, in this application, before formal charging, the charging capacitor 230 is pre-charged through the pre-charging branch 240 first, so that the voltage on the charging capacitor 230 reaches the same as the voltage of the system bus 400, which is beneficial to reducing the voltage drop between the modular power supply 100 and the system socket 300, and further beneficial to reducing the generation of plugging arcs, so as to play a role in protecting the port.

[0042] In some embodiments of the present application, the resistance value of the pre-charge circuit is greater than that of the charging circuit. It can be understood that this can reduce the magnitude of the current during the pre-charge process to ensure the safety of pre-charging.

[0043] In some embodiments of the present application, please refer to Figure 3 , Figure 3 which shows a schematic circuit diagram of the charging circuit 200 of the module power supply 100 provided in this embodiment. The pre-charge branch 240 of this embodiment includes a pre-charge resistor R4, and the pre-charge resistor R4 is used to increase the resistance value of the pre-charge circuit. It can be understood that the pre-charge resistor R4 is the current-limiting resistor.

[0044] In some embodiments of the present application, please continue to refer to Figure 3 , the pre-charge branch 240 of this embodiment further includes a pre-charge diode D5. The positive electrode of the pre-charge diode D5 is used to connect to the positive electrode of the system bus 400 through the socket 300, or the negative electrode of the pre-charge diode D5 is used to connect to the negative electrode of the system bus 400 through the socket 300.

[0045] It should be explained that the pre-charge diode D5 has unidirectional conductivity, that is, it only allows current to flow from the positive electrode to the negative electrode. This characteristic ensures that the current can only flow in a predetermined direction during the pre-charge process, avoiding the risk of current backflow or short circuit. When the voltage of the system bus 400 is lower than the residual voltage of the internal capacitor of the module power supply 100, the pre-charge diode D5 can prevent the module power supply 100 from reverse charging to the system bus 400, thereby protecting the system bus 400 and other devices that may be connected from being damaged.

[0046] In some embodiments of the present application, please continue to refer to Figure 3 and refer to Figure 4 , Figure 4 which shows a schematic circuit diagram of the charging circuit 200 of the module power supply 100 provided in this embodiment. The pre-charge branch 240 of this embodiment includes a first pin for connecting to the socket 300 (corresponding to CON1 in the figure). The positive electrode branch 210 and / or the negative electrode branch 220 are both provided with a second pin for connecting to the socket 300. The extension length of the first pin is greater than that of the second pin, so that during the process of connecting the charging circuit 200 to the socket 300, the pre-charge branch 240 is connected to the socket 300 before the positive electrode branch 210 and the negative electrode branch 220.

[0047] It can be understood that when the power module is just inserted into the system socket 300, the long pin (corresponding to the first pin) in the module socket 300 preferentially connects to the voltage of the system bus 400, enabling the parallel bus voltage to pass through the long pin and charge the electrolytic capacitor in the power supply via the pre-charge circuit, thereby equalizing the bus voltage and the voltage on the output side of the power supply to avoid arcing between the two ports when the module is fully inserted into the system socket 300, and playing a role in extending the service life of the power supply and system connectors. When the power supply is connected to the system socket 300 and AC power is input, a power pre-charge solution is provided that can ensure the safe operation of the system equipment under any circumstances, increase redundancy, and continuously and reliably supply power.

[0048] In some embodiments of the present application, the pre-charge branch 240 includes a first part connected to the positive branch 210 and a second part connected to the negative branch 220. The first pin includes a first sub-pin provided on the first part and a second sub-pin provided on the second part, and the lengths of the first sub-pin and the second sub-pin are both greater than the length of the second pin.

[0049] It should be explained that the pre-charge output socket 300 has two long pins. One is connected to the pre-charge circuit inside the power supply, and the other is connected to the negative pole. When the module power supply 100 is inserted into the parallel system socket 300, these two long pins access the system bus 400 prior to the short pins of the main output. The bus voltage passes through the pre-charge long pins and flows into the power supply through the pre-charge circuit, quickly pre-charging the charging capacitor so that the voltage on the capacitor reaches equality with the voltage of the system bus 400. That is, when all the short pins of the main power output of the module are inserted into the system socket 300, there is no voltage drop between the power supply port and the system socket 300, and no arc will be generated, which plays a good role in protecting the port. The pre-charge circuit can be placed on the positive output side or the negative output side, and the effects are the same.

[0050] In some embodiments of the present application, please refer to Figure 5 and Figure 6 , Figure 5 shows a schematic circuit diagram of the charging circuit 200 of the module power supply 100 provided in this embodiment, Figure 5 shows another schematic circuit diagram of the charging circuit 200 of the module power supply 100 provided in this embodiment. The pre-charge branch 240 is connected to the positive branch 210. The positive branch 210 includes a first switching element configured to be disconnected during the process of inserting the charging circuit into the socket 300 and to be closed after the charging capacitor 230 (corresponding to C5 in the figure) finishes charging; and / or, the pre-charge branch 240 is connected to the negative branch 220. The negative branch 220 includes a second switching element configured to be disconnected during the process of connecting the charging circuit 200 to the socket 300 and to be closed after the charging capacitor 230 finishes charging.

[0051] It should be noted that in the output circuit of the module power supply 100, there is a switch (the first switch or the second switch), the pre-charge branch 240 is connected in parallel across the switch. The connection between the charging circuit 200 and the socket 300 can adopt the docking method of the fixed jack socket 300, or the output can be connected to the system bus 400 by a wire harness. The pre-charge branch 240 can be placed on the positive output side or the negative output side.

[0052] Specifically, when the system is plugged into the mains, the module that first completes the output power provides voltage to the bus, and this voltage then pre-charges the internal capacitors of the modules with slower startup through the output-side pre-charge circuit. When the switch closes after startup, the voltage drop across the contact is balanced, avoiding phenomena such as arcing on the contact surface or the contacts, which is beneficial to extending the service life of the socket 300 (or the switch contacts), increasing the reliability of the power supply and the redundancy of the system.

[0053] In some embodiments of the present application, a fuse F1 is provided between the positive branch 210 and the module power supply 100; and / or a fuse F1 is provided between the negative branch 220 and the module power supply 100.

[0054] Embodiment 1: Please continue to refer to Figure 3 , this embodiment includes an electrolytic capacitor (corresponding to the charging capacitor 230), an output fuse F1, a pre-charge diode D5, a pre-charge resistor R4, an output connection pin (socket 300). PIN1 (corresponding to the first sub-pin) and PIN4 (corresponding to the second sub-pin) are two long pins for pre-charging. One foot of the first sub-pin is connected to one foot of the pre-charge resistor R4, the other foot of the pre-charge resistor R4 is connected to the anode of the pre-charge diode D5, the cathode of the pre-charge diode D5 is connected to the output positive, and the PIN2 pin of the socket 300 is connected to the negative. When the power supply is inserted into the parallel system socket 300, the long pins PIN1 and PIN4 of the socket 300 access the system bus 400 before the short pins PIN2 and PIN3. The bus voltage flows into the power supply through the long pins, via the pre-charge resistor R4 and the pre-charge diode D5. Before the short pins PIN2 and PIN3 contact the bus socket 300, the electrolytic capacitor is quickly pre-charged to make the voltage on the capacitor equal to the voltage of the system bus 400. When all the main power output short pins of the module are inserted into the system socket 300, the voltage drop between the power supply port and the bus socket 300 is almost zero, and no arc will be generated when the power supply port is fully in contact with the socket 300, which plays a good role in protecting the contact terminals.

[0055] Embodiment 2: Please continue to refer to Figure 4, the difference between this embodiment and Embodiment 1 is that the pre-charge resistor R4 and the pre-charge diode D5 in the pre-charge circuit part are designed at the negative output terminal. The long pins PIN1 and PIN4 of the output port socket 300 remain unchanged. The connection method is that the long pin PIN4 of the socket 300 is connected to the cathode of the pre-charge diode D5, the anode is connected to one end of the pre-charge resistor R4, and the other end is connected to the output negative terminal. The long pin PIN1 of the socket 300 is connected to the output positive terminal. When the power supply is inserted into the parallel system socket 300, the long pins PIN1 and PIN4 of the socket 300 access the system bus 400 prior to the short pins PIN2 and PIN3. The bus voltage charges the electrolytic capacitor 230 through the positive long pin PIN1, flows back to the bus through the pre-charge resistor R4 and the pre-charge diode D5 via the long pin PIN4, and quickly pre-charges the electrolytic capacitor before the short pins PIN2 and PIN3 contact the bus socket 300, making the voltage on the capacitor equal to the voltage of the system bus 400. When all the main power output short pins of the module are inserted into the system socket 300, the voltage drop between the power supply port and the bus socket 300 is almost zero, and no arc will be generated when the power supply port is fully contacted with the socket 300, which plays a good role in protecting the output port.

[0056] Embodiment 3: Please continue to refer to Figure 5 , this embodiment includes an electrolytic capacitor, an output fuse F1, a pre-charge diode D5, a current-limiting resistor (corresponding to the pre-charge resistor R4), and an adjustment switch RLY1; the current-limiting resistor and the adjustment switch RLY1 are connected to the output positive terminal, and the output is connected to the connection pin (socket 300) socket 300. The two pins PIN1 and PIN2 of the socket 300 can be pin sockets 300 or pin terminals, can be externally connected to the docking socket 300, or can be externally connected to a wire harness and output to the bus. PIN1 is connected to the PIN1 of the output adjustment switch RLY1, one end of the pre-charge resistor R4 is connected to the other end, and the other end is connected to the anode of the pre-charge diode D5. The cathode is connected to the internal output positive terminal of the power supply, the PIN2 of the adjustment switch RLY1, and the PIN1 of the fuse F1. The PIN2 of the fuse F1 is connected to the positive terminal of the capacitor charging capacitor 230, and the PIN2 of the socket 300 is connected to the negative terminal and the negative terminal of the electrolytic capacitor charging capacitor 230. For the module that completes power-on, before the output switch is closed, the voltage of the system bus 400 is accessed through PIN1 of the socket 300, flows into the power supply internally through the pre-charge resistor R4 and the pre-charge diode D5, and quickly pre-charges the electrolytic capacitor charging capacitor 230, making the voltage on the capacitor equal to the voltage of the system bus 400. When the switch is closed, the voltage drop across the switch contacts is almost zero, and no arc will be generated at this time, which plays a good role in protecting the contact switch.

[0057] Embodiment 4: Please continue to refer to Figure 6, The difference between this embodiment and Embodiment 3 is that the pre-charge diode D5, the current-limiting resistor, the pre-charge resistor R4, and the regulating switch RLY1 are connected to the negative output terminal. The two pins, PIN1 and PIN2, of the socket 300 can be pin sockets 300 or pin terminals. It can be externally connected to a docking socket 300 or output to the bus through a wire harness. PIN1 is connected to the positive output, and through the fuse F1, it is connected to the positive electrode of the electrolytic capacitor, the charging capacitor 230. PIN2 is connected to PIN1 of the regulating switch RLY1 and is connected to the cathode of the pre-charge diode D5. The anode is connected to one end of the pre-charge resistor R4, and the other end is connected to the negative output and the PIN2 of the regulating switch RLY1 and the negative electrode of the charging capacitor 230. After the module for completing startup, before the output switch is closed, the voltage of the system bus 400 is accessed through PIN1 of the socket 300, flows through the fuse F1, and then through the pre-charge resistor R4 and the pre-charge diode D5 into the power supply, quickly pre-charging the electrolytic capacitor, the charging capacitor 230, so that the voltage on the capacitor is equal to the voltage of the system bus 400. When the switch is closed, the voltage drop across the switch contacts is almost zero, and at this time, no arc will be generated, which plays a good role in protecting the contact switch.

[0058] Further, in order to better implement the charging circuit 200 of the module power supply 100 in any of the above embodiments, based on the charging circuit 200 of the module power supply 100, the present application also provides an energy storage device, including the above charging circuit 200 and the module power supply 100. The charging circuit 200 is used to connect to the system bus 40, and charge the module power supply 100.

[0059] Even further, in order to better implement the energy storage device in any of the above embodiments, based on the above energy storage device, the present application also provides an electrical device, including the above energy storage device.

[0060] In the above embodiments, the descriptions of each embodiment have their own focuses. For parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0061] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to the present application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to the present application. Such modifications, improvements, and corrections are proposed in the present application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of the present application.

[0062] Meanwhile, this application uses specific terms to describe the embodiments of this application. For example, "an embodiment", "one embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0063] Similarly, it should be noted that, in order to simplify the expression of the disclosure of this application and thus help the understanding of one or more utility model embodiments, in the previous description of the embodiments of this application, sometimes multiple features are merged into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than those mentioned in the claims. In fact, the features of the embodiment are less than all the features of the single embodiment disclosed above.

[0064] The above-described embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some 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 this application, and should all be included within the protection scope of this application.

Claims

1. A charging circuit for a module power supply, characterized in that: One side is used to connect to the system bus through the socket, and the other side is used to connect to the module power supply. The charging circuit includes: A positive branch, one end of which is used to connect to the positive electrode of the module power supply, and the other end of which is used to connect to the socket; A negative branch, one end of which is used to connect to the negative electrode of the module power supply, and the other end of which is used to connect to the socket; A charging capacitor, used for connecting between the positive electrode of the module power supply and the negative electrode of the module power supply; A pre-charging branch, one end of which is connected to the positive branch and / or the negative branch, and the other end of which is used to connect to the socket, and the pre-charging branch is configured to form a pre-charging loop with the system bus and charge the charging capacitor before the positive branch, the negative branch and the system bus form a charging loop.

2. The charging circuit of the modular power supply according to claim 1, characterized in that: The resistance value of the pre-charging circuit is greater than the resistance value of the charging circuit.

3. The charging circuit of the modular power supply according to claim 2, characterized in that: The pre-charging branch includes a pre-charging resistor, and the pre-charging resistor is used to increase the resistance value of the pre-charging loop.

4. The charging circuit of the modular power supply according to claim 3, characterized in that: The pre-charging branch further includes a pre-charging diode, the anode of the pre-charging diode is used to connect to the anode of the system bus through the socket, or the cathode of the pre-charging diode is used to connect to the cathode of the system bus through the socket.

5. The charging circuit according to any one of claims 1 to 4, characterized in that: The pre-charging branch includes a first pin for connecting to the socket, and the positive branch and / or the negative branch are both provided with a second pin for connecting to the socket, and the extension length of the first pin is greater than the extension length of the second pin, so that when the charging circuit is connected to the socket, the pre-charging branch is connected to the socket before the positive branch and the negative branch.

6. The charging circuit according to claim 5, characterized in that: The pre-charging branch includes a first part connected to the positive branch and a second part connected to the negative branch. The first pin includes a first sub-pin arranged on the first part and a second sub-pin arranged on the second part. The lengths of the first sub-pin and the second sub-pin are both greater than the length of the second pin.

7. The charging circuit according to any one of claims 1 to 4, characterized in that: The pre-charging branch is connected to the positive branch, and the positive branch includes a first switch element, which is configured to be disconnected when the charging circuit is plugged into the socket and closed after the charging capacitor is charged; And / or, the pre-charging branch is connected to the negative branch, and the negative branch includes a second switch element, which is configured to disconnect when the charging circuit is connected to the socket and close after the charging capacitor is charged.

8. The charging circuit according to any one of claims 1 to 4, characterized in that: A fuse is provided between the positive branch and the module power supply; And / or a fuse is provided between the negative branch and the module power supply.

9. An energy storage device, characterized in that: The device comprises the charging circuit and module power supply according to any one of claims 1 to 8, wherein the charging circuit is used to access a system bus and charge the module power supply.

10. An electrical device, characterized in that: Including the energy storage device according to claim 9.

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