A power distribution method, a power distribution circuit and a charging device

Abstract

The application relates to the technical field of device charging, and discloses a power distribution method, a power distribution circuit and a charging device, which can realize accurate control of the power output by a power output circuit required for charging the charging device through setting of multiple power reduction modes, can improve charging safety and reliability, is favorable for improving charging speed and overall utilization, and has a hierarchical temperature response system constructed through setting of first, second and third preset temperature values; the control circuit selects corresponding logic to execute different levels of power reduction operation according to real-time temperature reaching different preset values, can improve the accuracy of temperature control in the charging process, is favorable for reducing the situation that a charging device is damaged due to high temperature because the power reduction is too much or the power reduction is not enough to a reasonable range caused by user-defined power combination, and is favorable for improving the use experience of the charging device by users.

Description

Technical Field

[0001] This invention relates to the field of device charging technology, and in particular to a power distribution method, a power distribution circuit, and a charging device. Background Technology

[0002] Currently, the power allocation methods of PD multi-port chargers mainly include fixed derating allocation, priority allocation, dynamic intelligent allocation, and independent multi-output architecture. Furthermore, with the development of charging technology, new chargers are not only equipped with screen and APP operation functions, but also give users the ability to customize the power of each interface, which can flexibly target the power according to the actual needs of the device, significantly improving charging speed and overall utilization.

[0003] However, in practice, it has been found that due to the wide range of user-defined power limits, conventional power reduction logic often fails to meet the safety requirements of charging devices when power needs to be reduced to meet temperature and safety standards. For example, reducing power as a percentage of the device's total power can easily result in excessive or insufficient power reduction, leading to inadequate charging safety and reliability, and negatively impacting the user experience. Therefore, proposing a technical solution to improve charging safety and reliability is particularly important. Summary of the Invention

[0004] This invention provides a power distribution method, a power distribution circuit, and a charging device, which can improve charging safety and reliability and enhance the user experience of the charging device.

[0005] To address the aforementioned technical problems, the first aspect of this invention discloses a power distribution method applied in a power distribution circuit. The power distribution circuit includes a control circuit, a power output circuit, and a temperature detection circuit. The input terminal of the temperature detection circuit is electrically connected to the output terminal of the power output circuit, and the output terminal of the temperature detection circuit is electrically connected to the input terminal of the control circuit. The control terminal of the control circuit is electrically connected to the controlled terminal of the power output circuit. The method includes: The control circuit detects the real-time temperature value of the power output circuit sent by the temperature detection circuit. When the real-time temperature value is detected as a first preset temperature value, the control circuit performs a first power reduction operation on the power output circuit based on a preset first power reduction detection logic. The first power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the first preset power value. When the real-time temperature value is detected as the second preset temperature value, the control circuit performs a second power reduction operation on the power output circuit based on the preset second power reduction detection logic. The second preset temperature value is greater than the first preset temperature value. The second power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the second preset power value, which is less than the first preset power value. When the real-time temperature value is detected as the third preset temperature value, the control circuit performs a third power reduction operation on the power output circuit based on the pre-acquired second power reduction allocation table; the third preset temperature value is greater than the second preset temperature value.

[0006] As an optional implementation, in the first aspect of the present invention, the power output circuit includes a plurality of output circuits, each of which is connected in parallel with each other; Furthermore, the control circuit, based on a preset first power reduction detection logic, performs a first power reduction operation on the power output circuit, including: The control circuit initiates a preset first power reduction detection logic to calculate the current total power of the power output circuit based on the current power of each of the detected output circuits. When the current total power is less than or equal to the first preset power value, the control circuit determines that the first power reduction operation has been completed for the power output circuit; When the current total power is greater than the first preset power value, the control circuit performs preliminary power correction on the current power of each output circuit based on the first preset power value and the current total power to obtain the target power of each output circuit. The control circuit performs boundary protection processing on the target power of each output circuit according to the preset power boundary value. The control circuit calculates the target total power of the power output circuit based on the target power of all the output circuits, and verifies the target total power. When the verification is successful, the control circuit controls the power output circuit to output power according to the target total power. When the verification fails, the control circuit performs secondary power correction on the target power of at least one of the output circuits based on a preset secondary reduction logic.

[0007] As an optional implementation, in a first aspect of the invention, the control circuit verifies the target total power of the power output circuit based on the target power of all the output circuits, including: The control circuit calculates the sum of the target power of all the output circuits to obtain the target total power of the power output circuit; The control circuit determines whether the target total power is less than or equal to the first preset power value; When it is determined that the target total power is less than or equal to the first preset power value, the control circuit determines that the target total power verification has passed; When it is determined that the target total power is greater than the first preset power value, the control circuit determines that the target total power verification fails.

[0008] As an optional implementation, in the first aspect of the invention, the control circuit performs secondary power correction on the target power of at least one of the output circuits based on a preset secondary reduction logic, including: The control circuit initiates a preset secondary reduction logic to classify all the output circuits according to the power boundary value, and obtains a classification result. The classification result includes a first category of output circuits and a second category of output circuits. The target power of all the output circuits in the first category of output circuits is greater than the power boundary value, and the target power of any output circuit in the second category of output circuits is zero or the power boundary value. The control circuit calculates the sum of the target power of all the output circuits in the first type of output circuit to obtain the total power of the first type of output circuit, and calculates the sum of the target power of all the output circuits in the second type of output circuit to obtain the total power of the second type of output circuit. The control circuit calculates a secondary reduction coefficient for the first type of output circuit based on the first preset power value, the total power of the first type of output circuit, and the total power of the second type of output circuit. The control circuit performs secondary power correction on the target power of each output circuit in the first type of output circuit according to the secondary reduction coefficient of the first type of output circuit, so that the target total power of the power output circuit is less than or equal to the first preset power value.

[0009] As an optional implementation, in a first aspect of the invention, the control circuit performs preliminary power correction on the current power of each output circuit based on the first preset power value and the current total power to obtain the target power of each output circuit, including: The control circuit calculates the ratio of the first preset power value to the current total power to obtain the derating factor; The control circuit performs preliminary power correction on the current power of each output circuit according to the derating factor to obtain the target power of each output circuit.

[0010] As an optional implementation, in the first aspect of the present invention, the control circuit performs boundary protection processing on the target power of each output circuit according to a preset power boundary value, including: For each of the output circuits, the control circuit determines whether the current power of the output circuit is greater than zero and less than the power boundary value based on a preset power boundary value, and obtains a power boundary judgment result, wherein the power boundary value is greater than zero. When the power boundary determination result is yes, the control circuit sets the target power of the output circuit to the power boundary value; When the power boundary determination result is negative, the control circuit controls the output circuit to maintain the target power.

[0011] As an optional implementation, in the first aspect of the present invention, the method further includes: The control circuit detects the first temperature change value of the temperature detection circuit under the influence of the first preset power value; When the first temperature change value is detected to drop to a fourth preset temperature value and the duration of the first temperature change value being the fourth preset temperature value reaches a first preset detection duration, the control circuit controls the total power output by the power output circuit to be restored to a preset initial power value. Furthermore, the method further includes: The control circuit detects the second temperature change value of the temperature detection circuit under the influence of the second preset power value; When the detected temperature change value drops to the fifth preset temperature value and the duration of the second temperature change value being the fifth preset temperature value reaches the second preset detection duration, the control circuit controls the total power output by the power output circuit to recover to the first preset power value.

[0012] A second aspect of the present invention discloses a power distribution circuit, comprising a control circuit, a power output circuit, and a temperature detection circuit. The input terminal of the temperature detection circuit is electrically connected to the output terminal of the power output circuit, and the output terminal of the temperature detection circuit is electrically connected to the input terminal of the control circuit. The control terminal of the control circuit is electrically connected to the controlled terminal of the power output circuit. The control circuit is configured to: The real-time temperature value of the power output circuit sent by the temperature detection circuit is detected. When the real-time temperature value is detected as a first preset temperature value, a first power reduction operation is performed on the power output circuit based on the preset first power reduction detection logic. The first power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the first preset power value. When the real-time temperature value is detected as the second preset temperature value, a second power reduction operation is performed on the power output circuit based on the preset second power reduction detection logic. The second preset temperature value is greater than the first preset temperature value. The second power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the second preset power value, which is less than the first preset power value. When the real-time temperature value is detected as the third preset temperature value, a third power reduction operation is performed on the power output circuit based on the pre-acquired second power reduction allocation table; the third preset temperature value is greater than the second preset temperature value.

[0013] As an optional implementation, in a second aspect of the invention, the power output circuit includes a plurality of output circuits, each of which is connected in parallel with each other.

[0014] A third aspect of the present invention discloses another power distribution device, the device comprising: Memory containing executable program code; A processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the power allocation method disclosed in the first aspect of the present invention.

[0015] The fourth aspect of the present invention discloses a computer storage medium storing computer instructions, which, when invoked, are used to execute the power allocation method disclosed in the first aspect of the present invention.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: This invention provides a power distribution method applied in a power distribution circuit. The power distribution circuit includes a control circuit, a power output circuit, and a temperature detection circuit. The input terminal of the temperature detection circuit is electrically connected to the output terminal of the power output circuit, and the output terminal of the temperature detection circuit is electrically connected to the input terminal of the control circuit. The control terminal of the control circuit is electrically connected to the controlled terminal of the power output circuit. The control circuit detects the real-time temperature value of the power output circuit sent by the temperature detection circuit. When the detected real-time temperature value is a first preset temperature value, a first power reduction operation is performed on the power output circuit based on a preset first power reduction detection logic. The first power reduction operation is used to... The total power output of the power output circuit decreases to a first preset power value. When the real-time temperature value is detected as a second preset temperature value, a second power reduction operation is performed on the power output circuit based on a preset second power reduction detection logic. The second preset temperature value is greater than the first preset temperature value. The second power reduction operation is used to indicate that the total power output of the power output circuit decreases to the second preset power value, which is less than the first preset power value. When the real-time temperature value is detected as a third preset temperature value, a third power reduction operation is performed on the power output circuit based on a pre-acquired second power reduction allocation table. The third preset temperature value is greater than the second preset temperature value. As can be seen, implementing this invention can achieve precise control of the output power of the power output circuit required for charging the charging device by setting multiple power reduction methods, which can improve charging safety and reliability, and is conducive to improving charging speed and overall utilization. Furthermore, by setting first, second, and third preset temperature values, a graded temperature response system is constructed. The control circuit selects the corresponding logic to execute different levels of power reduction operations according to the real-time temperature reaching different preset values, which can improve the accuracy of temperature control during the charging process. This helps to reduce the occurrence of high-temperature damage to the charging device caused by excessive power reduction or power reduction not reaching a reasonable range due to user-defined power combinations, and is conducive to improving the user's experience of using the charging device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart of a power allocation method disclosed in an embodiment of the present invention; Figure 2 This is a schematic flowchart of another power allocation method disclosed in an embodiment of the present invention; Figure 3 This is a schematic diagram of a secondary power reduction allocation table provided by existing technology; Figure 4 This is a schematic diagram of a custom power reduction power allocation calculation table disclosed in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a power distribution circuit disclosed in an embodiment of the present invention; Figure 6 This is a schematic diagram of another power distribution circuit disclosed in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of an MCU circuit disclosed in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of a first output circuit disclosed in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of a second output circuit disclosed in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of a third output circuit disclosed in an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of a fourth output circuit disclosed in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of a fifth output circuit disclosed in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of a sixth output circuit disclosed in an embodiment of the present invention; Figure 14 This is a schematic diagram of the structure of an MCU power supply module disclosed in an embodiment of the present invention; Figure 15 This is a schematic diagram of the structure of a charging device disclosed in an embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that, unless otherwise explicitly specified and limited, the term "electrical connection" in the specification, claims and accompanying drawings of this invention should be interpreted broadly. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical connection, or a connection that allows communication between the two; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements.

[0021] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] This invention discloses a power distribution method, a power distribution circuit, and a charging device. It enables precise control of the output power of the charging device's power output circuit by setting multiple power reduction modes, improving charging safety and reliability, and enhancing charging speed and overall utilization. Furthermore, by setting first, second, and third preset temperature values, a graded temperature response system is constructed. The control circuit selects corresponding logic to execute different levels of power reduction operations based on the real-time temperature reaching different preset values. This improves the accuracy of temperature control during charging, reducing the risk of overheating and damage to the charging device due to excessive or insufficient power reduction caused by user-defined power combinations, thus enhancing the user experience. Detailed descriptions follow.

[0024] Example 1 Please see Figure 1 , Figure 1 This is a schematic flowchart of a power allocation method disclosed in an embodiment of the present invention. Figure 1The described power distribution method can be applied to a power distribution circuit. Optionally, the power distribution circuit includes a control circuit, a power output circuit, and a temperature detection circuit. The input terminal of the temperature detection circuit is electrically connected to the output terminal of the power output circuit, and the output terminal of the temperature detection circuit is electrically connected to the input terminal of the control circuit. The control terminal of the control circuit is electrically connected to the controlled terminal of the power output circuit. Further optionally, the power output circuit includes multiple output circuits, each of which is connected in parallel. Further optionally, the control circuit includes an MCU circuit, a display circuit, and a WiFi / Bluetooth circuit. The input terminal of the MCU circuit is electrically connected to the output terminal of the temperature detection circuit, the control terminal of the MCU circuit is electrically connected to the controlled terminal of the power output circuit, the output terminal of the MCU circuit is electrically connected to the display circuit, and the communication terminal of the MCU circuit is electrically connected to the first communication terminal of the WiFi / Bluetooth circuit. The second communication terminal of the WiFi / Bluetooth circuit is used for Bluetooth connection with a smart terminal (such as a mobile phone, tablet, computer, etc.). This embodiment of the invention is not limited. Figure 1 As shown, the power allocation method may include the following operations: 101. The control circuit detects the real-time temperature value sent by the power output circuit to the temperature detection circuit.

[0025] 102. When the detected real-time temperature value is the first preset temperature value, the control circuit performs the first power reduction operation on the power output circuit based on the preset first power reduction detection logic.

[0026] In this embodiment of the invention, the first power reduction detection logic may include logic that, based on the detected relationship between the power output circuit and the first preset power value, performs corresponding power reduction processing on the power output of each output circuit in the power output circuit.

[0027] In this embodiment of the invention, the first power reduction operation is used to instruct the total power output by the power output circuit to decrease to a first preset power value. For example, assuming the first preset temperature value is 80°C and the first preset power value is 240W, when the real-time temperature value is detected to be 80°C, the control circuit initiates the first power reduction detection logic to reduce the total power output by the power output circuit to 240W.

[0028] 103. When the real-time temperature value is detected as the second preset temperature value, the control circuit performs a second power reduction operation on the power output circuit based on the preset second power reduction detection logic.

[0029] In this embodiment of the invention, the second power reduction detection logic may include logic that reduces the power output of each output circuit in the power output circuit according to the detected relationship between the power output circuit and the second preset power value.

[0030] In this embodiment of the invention, the second preset temperature value is greater than the first preset temperature value, and the second power reduction operation is used to instruct the total power output by the power output circuit to decrease to the second preset power value, which is less than the first preset power value. For example, assuming the second preset temperature value is 90°C and the second preset power value is 180W, when the real-time temperature value is detected to be 90°C, the control circuit initiates the second power reduction detection logic to reduce the total power output by the power output circuit to 180W.

[0031] 104. When the detected real-time temperature value is the third preset temperature value, the control circuit performs the third power reduction operation on the power output circuit based on the pre-acquired second power reduction allocation table.

[0032] In this embodiment of the invention, the third preset temperature value is greater than the second preset temperature value. It should be noted that the second power reduction allocation table can be as follows: Figure 3 As shown, Figure 3 This is a schematic diagram of a second power reduction distribution table provided by existing technology. For example, assume the third preset temperature value is 100°C, and the power output circuit includes 7 output circuits (i.e., as shown in the diagram). Figure 3 As shown in the diagram (seven ports), when the detected real-time temperature value is 100℃, the control circuit, through a preset second power reduction allocation table, reduces the total power output of the power output circuit to the level shown. Figure 3 The 180W shown.

[0033] It is evident that implementation Figure 1 The described power distribution method can accurately control the output power of the power output circuit required for charging the charging device by setting multiple power reduction modes. This improves charging safety and reliability, and helps to increase charging speed and overall utilization. Furthermore, by setting first, second, and third preset temperature values, a graded temperature response system is constructed. The control circuit selects the corresponding logic to execute different levels of power reduction operations according to the real-time temperature reaching different preset values. This improves the accuracy of temperature control during the charging process and helps to reduce the occurrence of high-temperature damage to the charging device caused by excessive power reduction or power reduction not reaching a reasonable range due to user-defined power combinations. This also helps to improve the user experience of the charging device.

[0034] In an optional embodiment, the control circuit in step 102 above performs a first power reduction operation on the power output circuit based on a preset first power reduction detection logic, including: The control circuit initiates the preset first power reduction detection logic to calculate the current total power of the power output circuit based on the current power of each output circuit detected in all output circuits. When the current total power is less than or equal to the first preset power value, the control circuit determines that the first power reduction operation has been completed for the power output circuit. When the current total power is greater than the first preset power value, the control circuit performs preliminary power correction on the current power of each output circuit based on the first preset power value and the current total power to obtain the target power of each output circuit. The control circuit performs boundary protection processing on the target power of each output circuit according to the preset power boundary value; The control circuit calculates the target total power of the power output circuit based on the target power of all output circuits, and verifies the target total power. When the verification is passed, the control circuit controls the power output circuit to output power according to the target total power. When the verification fails, the control circuit performs secondary power correction on the target power of at least one output circuit based on the preset secondary reduction logic.

[0035] In this embodiment of the invention, the boundary protection process may be to forcibly set the target power of an output circuit whose target power is within a preset power range to the corresponding boundary value of the preset power range.

[0036] In this embodiment of the invention, optionally, the first power reduction operation includes at least a preliminary power correction operation on the current power of each output circuit; or, the first power reduction operation includes at least a preliminary power correction operation on the current power of each output circuit, and further includes a secondary power correction operation on the target power of at least one output circuit. This embodiment of the invention does not impose any limitations.

[0037] As can be seen, this optional embodiment can initiate a preset first power reduction detection logic through the control circuit to calculate the current total power of the power output circuit based on the current power of each output circuit detected. When the current total power is less than or equal to a first preset power value, it is determined that the first power reduction operation has been completed for the power output circuit. The first power reduction detection logic can re-determine whether power reduction processing is needed by detecting the current total power of the power output circuit, which helps to reduce the occurrence of excessive power reduction. When the current total power is greater than the first preset power value, the control circuit performs preliminary power correction on the current power of each output circuit based on the first preset power value and the current total power to obtain the target power of each output circuit, which can improve the accuracy of the preliminary correction. The system ensures the accuracy and efficiency of the target power and performs boundary protection processing on the target power of each output circuit based on preset power boundary values. This boundary protection process reduces the possibility of damage to the charging port caused by unstable circuit current during charging due to excessively low target power. Subsequently, the system calculates the total target power of the power output circuit based on the target power of all output circuits and verifies the total target power. When the verification passes, the control circuit controls the power output circuit to output according to the total target power. When the verification fails, the control circuit performs secondary power correction on the target power of at least one output circuit based on preset secondary reduction logic. By setting up the process of initial power correction and secondary correction, the system can achieve precise control of the output power of each output circuit.

[0038] In this optional embodiment, as an optional implementation, the control circuit performs preliminary power correction on the current power of each output circuit based on a first preset power value and the current total power to obtain the target power of each output circuit, including: The control circuit calculates the ratio of the first preset power value to the current total power to obtain the derating factor; The control circuit performs preliminary power correction on the current power of each output circuit based on the derating factor to obtain the target power of each output circuit.

[0039] For example, taking a power output circuit that includes 7 output circuits as an example, the control circuit calculates the current total power of the power output circuit using the following formula:

[0040] Among them, P i Let P be the current power of the i-th output circuit. total This represents the current total power of the power output circuit. If P totalIf the power is ≤240W and the real-time temperature reaches the first preset temperature value, the original power setting will be maintained directly without derating; that is, no adjustment is needed and the first power derating detection process can be ended directly. If P total For values ​​greater than 240W, the reduction factor is calculated using the following formula:

[0041] Where k is the reduction coefficient, P total 240 represents the current total power of the power output circuit and is the specific value of the first preset power value proposed by example. The new power of each port (i.e., each output circuit) is calculated according to the derating factor k, which is the target power for the initial power correction. The calculation formula is as follows:

[0042] Among them, P i Let P' be the target power of the i-th output circuit. i Let be the current power of the i-th output circuit, and k be the derating factor; If P i =0W, then P i Keep 0W (i.e., close the port and do not participate in the rate reduction); if P i If ≠0W, then the calculated P i The power after the decimal point is rounded down to the nearest integer. For example, 16.6W is rounded down to 16W.

[0043] As can be seen, this optional implementation can calculate the ratio between the first preset power value and the current total power through the control circuit to obtain the derating factor, and perform preliminary power correction on the current power of each output circuit based on the derating factor to obtain the target power of each output circuit. This can improve the accuracy and reliability of the derating factor calculation, thereby improving the accuracy and reliability of the preliminary correction of the current power, and further improving the accuracy and reliability of obtaining the target power.

[0044] In this optional embodiment, as another optional implementation, the control circuit performs boundary protection processing on the target power of each output circuit according to a preset power boundary value, including: For each output circuit, the control circuit determines whether the current power of the output circuit is greater than zero and less than the power boundary value based on the preset power boundary value, and obtains the power boundary judgment result, where the power boundary value is greater than zero. When the power boundary judgment result is yes, the control circuit sets the target power of the output circuit as the power boundary value. When the power boundary judgment result is negative, the control circuit controls the output circuit to maintain the target power.

[0045] For example, for each interface: If P i ′≤15W and P i If '>0W, then force it to be set to 15W; If P i =0W, then P i Keep it at 0W; If P i If ′>15W, then P i ′ can be represented in the following format: P i =IF(set power) k=0,0,MAX(15,FLOOR(set power)) k,1))).

[0046] As can be seen, this optional implementation can determine whether the current power of each output circuit is greater than zero and less than the power boundary value based on a preset power boundary value, and obtain the power boundary judgment result. When the power boundary judgment result is negative, the control circuit controls the power of the output circuit to maintain the target power. When the power boundary judgment result is positive, the target power of the output circuit is set as the power boundary value. By comparing the current power with the power boundary value, the protection accuracy of the output circuit with a low target power can be improved. This can reduce the occurrence of damage to the charging port caused by unstable circuit current during charging due to the low target power obtained by correction.

[0047] In this optional embodiment, as yet another optional implementation, the control circuit verifies the target total power based on the target power of all output circuits, calculated from the target power of all output circuits, including: The control circuit calculates the sum of the target power of all output circuits to obtain the target total power of the power output circuit; The control circuit determines whether the target total power is less than or equal to the first preset power value; When the target total power is determined to be less than or equal to the first preset power value, the control circuit determines that the target total power verification has passed. When the target total power is determined to be greater than the first preset power value, the control circuit determines that the target total power verification fails.

[0048] Taking the above seven output circuits as an example, the formula for calculating the target total power of the power output circuit is as follows:

[0049] in, P represents the target total power of the power output circuit. i ′ represents the target power of the i-th output circuit; if If the value is ≤240W, the verification passes, and the result can be output. if If the value is greater than 240W, the verification will fail, and a second reduction is required.

[0050] As can be seen, this optional implementation can calculate the sum of the target power of all output circuits through the control circuit to obtain the target total power of the power output circuit, and determine whether the target total power is less than or equal to the first preset power value. When it is determined that the target total power is less than or equal to the first preset power value, the target total power verification is determined to be passed. When it is determined that the target total power is greater than the first preset power value, the target total power verification is determined to be failed. This can improve the accuracy of the calculation of the target total power of the power output circuit, thereby improving the accuracy of the judgment on whether the target total power is less than or equal to the first preset power value corresponding to the first power reduction detection logic, and thus improving the accuracy and reliability of the target total power verification.

[0051] In this optional implementation, the control circuit optionally performs secondary power correction on the target power of at least one output circuit based on a preset secondary reduction logic, including: The control circuit initiates a preset secondary reduction logic to classify all output circuits according to the power boundary value, and obtains the classification result. The classification result includes the first type of output circuits and the second type of output circuits. The target power of all output circuits in the first type of output circuits is greater than the power boundary value, and the target power of any output circuit in the second type of output circuits is zero or the power boundary value. The control circuit calculates the sum of the target power of all output circuits in the first type of output circuit to obtain the total power of the first type of output circuit, and calculates the sum of the target power of all output circuits in the second type of output circuit to obtain the total power of the second type of output circuit. The control circuit calculates the secondary reduction coefficient for the first type of output circuit based on the first preset power value, the total power of the first type of output circuit, and the total power of the second type of output circuit. The control circuit performs secondary power correction on the target power of each output circuit in the first type of output circuit according to the secondary reduction coefficient of the first type of output circuit, so that the target total power of the power output circuit is less than or equal to the first preset power value.

[0052] In this embodiment of the invention, the working principle of the secondary reduction logic is as follows: For the second type of output circuit, the target power of each output circuit within the second type of output circuit remains unchanged; for the first type of output circuit, a secondary reduction coefficient is calculated to perform secondary power correction on each output circuit within the first type of output circuit. For example, taking a power boundary value of 15W as an example, that is, the 0W port remains unchanged, the 15W port remains unchanged, and only ports with power greater than 15W are reduced. Specifically: Take only P i For ports with a current power of 15W, recalculate the current total power P for these ports. active ; Calculate the secondary reduction coefficient using the following formula:

[0053] Where k2 is the second reduction coefficient, P active The total power of the first type of output circuit is given by [formula missing]. The total power of the second type of output circuit can be expressed as [formula missing]. ; For P i For ports with a power greater than 15W, multiply their target power by k2 again. Round the calculation results down to ensure that the total power is ≤240W.

[0054] As can be seen, this optional implementation can also activate a preset secondary reduction logic through a control circuit to classify all output circuits according to power boundary values, obtaining classification results. The classification results include first-class output circuits and second-class output circuits. The sum of the target power of all output circuits in the first-class output circuits is calculated to obtain the total power of the first-class output circuits, and the sum of the target power of all output circuits in the second-class output circuits is calculated to obtain the total power of the second-class output circuits. Based on the first preset power value, the total power of the first-class output circuits, and the total power of the second-class output circuits, a secondary reduction coefficient for the first-class output circuits is calculated. Based on the secondary reduction coefficient for the first-class output circuits, a secondary power correction is performed on the target power of each output circuit in the first-class output circuits, so that the total target power of the power output circuits is less than or equal to the first preset power value. This can improve the classification accuracy and reliability of the first-class output circuits that require secondary power correction by using power boundary values, thereby improving the calculation accuracy of the secondary reduction coefficient used for secondary power correction, and further improving the accuracy and reliability of power correction for the first-class output circuits.

[0055] It should be noted that for a detailed description of the embodiment of the second power reduction detection logic, please refer to the relevant description of the embodiment of the first power reduction detection logic. The embodiments of the present invention will not repeat the details.

[0056] For example, such as Figure 4As shown, Figure 4 This is a schematic diagram of a custom power reduction power allocation calculation table disclosed in an embodiment of the present invention. Figure 4 Taking a power output circuit comprising seven output circuits as an example, as follows: Figure 4 The numbers C1, C2, C3, C4, C5, C6, and A1 are shown, and Figure 4 Taking a first preset power value of 240W and a second preset power value of 180W as an example, K0 represents the first derating coefficient in the first power reduction detection logic, K1 represents the second derating coefficient in the first power reduction detection logic, and K2 represents the derating coefficient in the second power reduction detection logic.

[0057] Example 2 Please see Figure 2 , Figure 2 This is a schematic flowchart of another power allocation method disclosed in an embodiment of the present invention. Figure 2 The described power distribution method can be applied to a power distribution circuit. Optionally, the power distribution circuit includes a control circuit, a power output circuit, and a temperature detection circuit. The input terminal of the temperature detection circuit is electrically connected to the output terminal of the power output circuit, and the output terminal of the temperature detection circuit is electrically connected to the input terminal of the control circuit. The control terminal of the control circuit is electrically connected to the controlled terminal of the power output circuit. Further optionally, the power output circuit includes multiple output circuits, each of which is connected in parallel. Further optionally, the control circuit includes an MCU circuit, a display circuit, and a WiFi / Bluetooth circuit. The input terminal of the MCU circuit is electrically connected to the output terminal of the temperature detection circuit, the control terminal of the MCU circuit is electrically connected to the controlled terminal of the power output circuit, the output terminal of the MCU circuit is electrically connected to the display circuit, and the communication terminal of the MCU circuit is electrically connected to the first communication terminal of the WiFi / Bluetooth circuit. The second communication terminal of the WiFi / Bluetooth circuit is used for Bluetooth connection with a smart terminal (such as a mobile phone, tablet, computer, etc.). This embodiment of the invention is not limited. Figure 2 As shown, the power allocation method may include the following operations: 201. The control circuit detects the real-time temperature value sent by the power output circuit to the temperature detection circuit.

[0058] 202. When the real-time temperature value is detected as the first preset temperature value, the control circuit performs the first power reduction operation on the power output circuit based on the preset first power reduction detection logic.

[0059] 203. The control circuit detects the temperature change value under the influence of the first preset power value.

[0060] 204. When the detected temperature change value drops to the fourth preset temperature value and the duration of the temperature change value reaches the fourth preset temperature value reaches the first preset detection duration, the control circuit controls the total power output of the power output circuit to restore to the preset initial power value.

[0061] For example, when the real-time temperature is detected to be the first preset temperature value, such as 80℃, the control circuit starts the first power reduction detection logic and reduces the total power output of the power output circuit to 240W according to the first preset power value. At this time, if the real-time temperature continues to drop to the fourth preset temperature value, such as 65℃, and is maintained for the first preset detection time, such as 5 minutes, the power will be restored to the preset initial power value, such as the user's initial customized power value.

[0062] 205. When the real-time temperature value is detected as the second preset temperature value, the control circuit performs a second power reduction operation on the power output circuit based on the preset second power reduction detection logic.

[0063] 206. When the detected real-time temperature value is the third preset temperature value, the control circuit performs a third power reduction operation on the power output circuit based on the pre-acquired second power reduction allocation table; the third preset temperature value is greater than the second preset temperature value.

[0064] In this embodiment of the invention, for other descriptions of steps 201-202 and steps 205-206, please refer to the detailed description of steps 101-104 in Embodiment 1. These descriptions will not be repeated in this embodiment of the invention.

[0065] It is evident that implementation Figure 2The described power distribution method enables precise control of the output power of the charging device's power output circuit by setting multiple power reduction modes. This improves charging safety and reliability, and is beneficial for increasing charging speed and overall utilization. Furthermore, a graded temperature response system is constructed by setting first, second, and third preset temperature values. The control circuit selects corresponding logic to execute different levels of power reduction operations based on the real-time temperature reaching different preset values. This improves the accuracy of temperature control during charging, reducing the risk of overheating and damage to the charging device due to excessive or insufficient power reduction caused by user-defined power combinations, thus enhancing the user experience. In addition, the control circuit can detect the first temperature change value under the influence of the first preset power value. Only when the first temperature change value drops to the fourth preset temperature value and remains detected for a preset duration will the power output circuit be restored to its initial value. Using the temperature change value as the basis for the first power reduction recovery allows for more precise and scientific power adjustment, helping the device maintain stable performance output under different operating conditions and avoiding the impact of excessive power fluctuations on the normal operation and performance of the device.

[0066] In an optional embodiment, the method may further include: The control circuit detects the second temperature change value under the influence of the second preset power value; When the detected second temperature change value drops to the fifth preset temperature value and the duration of the second temperature change value being the fifth preset temperature value reaches the second preset detection duration, the control circuit controls the total power output by the power output circuit to return to the first preset power value.

[0067] For example, when the real-time temperature is detected to be the second preset temperature value, such as 95°C, the control circuit starts the second power reduction detection logic and reduces the total power output of the power output circuit to 180W according to the second preset power value. At this time, if the real-time temperature continues to drop to the fifth preset temperature value, such as 80°C, and is maintained for the second preset detection time, such as 5 minutes, the power is restored to the first preset power value, such as 240W.

[0068] As can be seen, this optional embodiment can detect the second temperature change value under the influence of the second preset power value through the control circuit. When the second temperature change value drops to the fifth preset temperature value and continues to be detected for a preset time, the power output of the power output circuit is controlled to recover to the initial value. The temperature change value can be used as the control basis for the second power reduction recovery, which can make the power adjustment of the device more accurate and scientific. It helps the device maintain stable performance output under different working conditions and avoids the normal operation and performance of the device being affected by excessive power fluctuations.

[0069] Example 3 Please see Figure 5 , Figure 5 This is a schematic diagram of a power distribution circuit disclosed in an embodiment of the present invention. Figure 5 The described power distribution circuit includes a control circuit 101, a power output circuit 102, and a temperature detection circuit 103. The input terminal of the temperature detection circuit 103 is electrically connected to the output terminal of the power output circuit 102, and the output terminal of the temperature detection circuit 103 is electrically connected to the input terminal of the control circuit 101. The control terminal of the control circuit 101 is electrically connected to the controlled terminal of the power output circuit 102. The control circuit 101 is used for: The real-time temperature value sent by the temperature detection circuit to the power output circuit is detected. When the detected real-time temperature value is the first preset temperature value, based on the preset first power reduction detection logic, the power output circuit performs the first power reduction operation. The first power reduction operation is used to indicate that the total power output by the power output circuit drops to the first preset power value. When the detected real-time temperature value is the second preset temperature value, based on the preset second power reduction detection logic, the power output circuit performs a second power reduction operation. The second preset temperature value is greater than the first preset temperature value. The second power reduction operation is used to indicate that the total power output by the power output circuit drops to the second preset power value. The second preset power value is less than the first preset power value. When the detected real-time temperature value is the third preset temperature value, the power output circuit performs a third power reduction operation based on the pre-acquired second power reduction allocation table; the third preset temperature value is greater than the second preset temperature value.

[0070] It is evident that implementation Figure 5 The described power distribution circuit can accurately control the output power of the power output circuit required for charging the charging device by setting multiple power reduction methods. This improves charging safety and reliability, and helps to increase charging speed and overall utilization. Furthermore, by setting first, second, and third preset temperature values, a graded temperature response system is constructed. The control circuit selects the corresponding logic to execute different levels of power reduction operations according to the real-time temperature reaching different preset values. This improves the accuracy of temperature control during the charging process and helps to reduce the occurrence of high-temperature damage to the charging device caused by excessive power reduction or power reduction not reaching a reasonable range due to user-defined power combinations. This also helps to improve the user experience of the charging device.

[0071] Optionally, the power output circuit 102 includes multiple output circuits, each connected in parallel. Further optionally, the control circuit 101 includes an MCU circuit 1011, a display circuit 1012, and a WiFi / Bluetooth circuit 1013. The input terminal of the MCU circuit 1011 is electrically connected to the output terminal of the temperature detection circuit 103. The control terminal of the MCU circuit 1011 is electrically connected to the controlled terminal of the power output circuit. The output terminal of the MCU circuit 1011 is electrically connected to the display circuit 1012. The communication terminal of the MCU circuit 1011 is electrically connected to the first communication terminal of the WiFi / Bluetooth circuit 1013. The second communication terminal of the WiFi / Bluetooth circuit 1013 is used for Bluetooth connection with a smart terminal (such as a mobile phone, tablet, computer, etc.). This embodiment of the invention is not limited to this. Figure 6 As shown, Figure 6 This is a schematic diagram of another power distribution circuit disclosed in an embodiment of the present invention, and Figure 6 Taking a power output circuit comprising six output circuits as an example, as follows: Figure 6 The first, second, third, fourth, fifth, and sixth output circuits shown are further illustrated. The power output circuit also includes an AC / DC conversion circuit. A temperature detection circuit collects the temperature signal from the power output circuit and outputs it to the MCU circuit 1011. The MCU circuit 1011 communicates with the power output circuit via the I2C bus protocol. The MCU circuit 1011 can send RGB and SCLK signals to the display circuit 1012 to control its display content. The MCU circuit 1011 communicates with the WiFi / Bluetooth circuit 1013 via a TX / RX data line. The WiFi / Bluetooth circuit 1013 connects to a smart terminal via Bluetooth. Specifically, the AC / DC conversion circuit converts AC voltage to DC voltage, the temperature detection circuit collects the product's temperature signal, and the MCU circuit 1011 processes the APP information and temperature signal received from the smart terminal by the WiFi / Bluetooth circuit 1013 to control and output safe and reliable power for the power output circuit, displaying the relevant information on the display circuit 1012.

[0072] For example, such as Figures 7-13 As shown, Figure 7 This is a schematic diagram of the structure of an MCU circuit disclosed in an embodiment of the present invention. The control terminal of the MCU circuit 1011 is as follows: Figure 7 The numbers IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, and IRQ6 are shown below. Figure 8 This is a schematic diagram of the structure of a first output circuit disclosed in an embodiment of the present invention. The controlled terminal of the first output circuit is as follows: Figure 8 IRQ1 as shown; Figure 9This is a schematic diagram of a second output circuit disclosed in an embodiment of the present invention. The controlled terminal of the second output circuit is as follows: Figure 9 IRQ2 as shown; Figure 10 This is a schematic diagram of a third output circuit disclosed in an embodiment of the present invention. The controlled terminal of the third output circuit is as follows: Figure 10 IRQ3 as shown; Figure 11 This is a schematic diagram of a fourth output circuit disclosed in an embodiment of the present invention. The controlled terminal of the fourth output circuit is as follows: Figure 11 IRQ4 as shown; Figure 12 This is a schematic diagram of a fifth output circuit disclosed in an embodiment of the present invention. The controlled terminal of the fifth output circuit is as follows: Figure 12 IRQ5 as shown; Figure 13 This is a schematic diagram of the structure of a sixth output circuit disclosed in an embodiment of the present invention. The controlled terminal of the sixth output circuit is as follows: Figure 13 The IRQ6 shown; furthermore, the control circuit may also include an MCU power supply module, the power supply terminal of which is used to electrically connect to the power supply terminal of the MCU circuit 1011, such as... Figure 14 As shown, Figure 14 This is a schematic diagram of the structure of an MCU power supply module disclosed in an embodiment of the present invention. The power supply terminal of the MCU power supply module is as follows: Figure 14 The 3.3V-MCU shown.

[0073] Example 4 Please see Figure 15 , Figure 15 This is a schematic diagram of the structure of a charging device disclosed in an embodiment of the present invention. The device includes the power distribution circuit described in Embodiment 3. It should be noted that for a detailed description of the power distribution circuit, please refer to the specific description of the relevant content in Embodiment 3; this embodiment of the present invention will not repeat it.

[0074] It is evident that implementation Figure 15 The described charging device can precisely control the output power of the power output circuit required for charging by setting multiple power reduction methods, which can improve charging safety and reliability, and help improve charging speed and overall utilization. Furthermore, by setting first, second and third preset temperature values, a graded temperature response system is constructed. The control circuit selects the corresponding logic to execute different levels of power reduction operation according to the real-time temperature reaching different preset values. This can improve the accuracy of temperature control during the charging process, and help reduce the occurrence of high temperature damage to the charging device caused by excessive power reduction or power reduction not reaching a reasonable range due to user-defined power combinations. This can help improve the user experience of the charging device.

[0075] Finally, it should be noted that the power distribution method, power distribution circuit, and charging device disclosed in the embodiments of the present invention are merely preferred embodiments of the present invention and are only used to illustrate the technical solutions of the present invention, not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power distribution method, characterized in that, The method is applied in a power distribution circuit, which includes a control circuit, a power output circuit, and a temperature detection circuit. The input terminal of the temperature detection circuit is electrically connected to the output terminal of the power output circuit, and the output terminal of the temperature detection circuit is electrically connected to the input terminal of the control circuit. The control terminal of the control circuit is electrically connected to the controlled terminal of the power output circuit. The method includes: The control circuit detects the real-time temperature value of the power output circuit sent by the temperature detection circuit. When the real-time temperature value is detected as a first preset temperature value, the control circuit performs a first power reduction operation on the power output circuit based on a preset first power reduction detection logic. The first power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the first preset power value. When the real-time temperature value is detected as the second preset temperature value, the control circuit performs a second power reduction operation on the power output circuit based on the preset second power reduction detection logic. The second preset temperature value is greater than the first preset temperature value. The second power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the second preset power value, which is less than the first preset power value. When the real-time temperature value is detected as the third preset temperature value, the control circuit performs a third power reduction operation on the power output circuit based on the pre-acquired second power reduction allocation table; the third preset temperature value is greater than the second preset temperature value.

2. The power distribution method according to claim 1, characterized in that, The power output circuit includes multiple output circuits, and each of the output circuits is connected in parallel with each other. Furthermore, the control circuit, based on a preset first power reduction detection logic, performs a first power reduction operation on the power output circuit, including: The control circuit initiates a preset first power reduction detection logic to calculate the current total power of the power output circuit based on the current power of each of the detected output circuits. When the current total power is less than or equal to the first preset power value, the control circuit determines that the first power reduction operation has been completed for the power output circuit; When the current total power is greater than the first preset power value, the control circuit performs preliminary power correction on the current power of each output circuit based on the first preset power value and the current total power to obtain the target power of each output circuit. The control circuit performs boundary protection processing on the target power of each output circuit according to the preset power boundary value. The control circuit calculates the target total power of the power output circuit based on the target power of all the output circuits, and verifies the target total power. When the verification is successful, the control circuit controls the power output circuit to output power according to the target total power. When the verification fails, the control circuit performs secondary power correction on the target power of at least one of the output circuits based on a preset secondary reduction logic.

3. The power distribution method according to claim 2, characterized in that, The control circuit calculates the target total power of the power output circuit based on the target power of all the output circuits, and verifies the target total power, including: The control circuit calculates the sum of the target power of all the output circuits to obtain the target total power of the power output circuit; The control circuit determines whether the target total power is less than or equal to the first preset power value; When it is determined that the target total power is less than or equal to the first preset power value, the control circuit determines that the target total power verification has passed; When it is determined that the target total power is greater than the first preset power value, the control circuit determines that the target total power verification fails.

4. The power distribution method according to claim 3, characterized in that, The control circuit, based on preset secondary reduction logic, performs secondary power correction on the target power of at least one of the output circuits, including: The control circuit initiates a preset secondary reduction logic to classify all the output circuits according to the power boundary value, and obtains a classification result. The classification result includes a first category of output circuits and a second category of output circuits. The target power of all the output circuits in the first category of output circuits is greater than the power boundary value, and the target power of any output circuit in the second category of output circuits is zero or the power boundary value. The control circuit calculates the sum of the target power of all the output circuits in the first type of output circuit to obtain the total power of the first type of output circuit, and calculates the sum of the target power of all the output circuits in the second type of output circuit to obtain the total power of the second type of output circuit. The control circuit calculates a secondary reduction coefficient for the first type of output circuit based on the first preset power value, the total power of the first type of output circuit, and the total power of the second type of output circuit. The control circuit performs secondary power correction on the target power of each output circuit in the first type of output circuit according to the secondary reduction coefficient of the first type of output circuit, so that the target total power of the power output circuit is less than or equal to the first preset power value.

5. The power distribution method according to any one of claims 2-4, characterized in that, The control circuit performs preliminary power correction on the current power of each output circuit based on the first preset power value and the current total power to obtain the target power of each output circuit, including: The control circuit calculates the ratio of the first preset power value to the current total power to obtain the derating factor; The control circuit performs preliminary power correction on the current power of each output circuit according to the derating factor to obtain the target power of each output circuit.

6. The power distribution method according to any one of claims 2-4, characterized in that, The control circuit performs boundary protection processing on the target power of each output circuit according to a preset power boundary value, including: For each of the output circuits, the control circuit determines whether the current power of the output circuit is greater than zero and less than the power boundary value based on a preset power boundary value, and obtains a power boundary judgment result, wherein the power boundary value is greater than zero. When the power boundary determination result is yes, the control circuit sets the target power of the output circuit to the power boundary value; When the power boundary determination result is negative, the control circuit controls the output circuit to maintain the target power.

7. The power distribution method according to any one of claims 1-4, characterized in that, The method further includes: The control circuit detects the first temperature change value of the temperature detection circuit under the influence of the first preset power value; When the first temperature change value is detected to drop to a fourth preset temperature value and the duration of the first temperature change value being the fourth preset temperature value reaches a first preset detection duration, the control circuit controls the total power output by the power output circuit to be restored to a preset initial power value. Furthermore, the method further includes: The control circuit detects the second temperature change value of the temperature detection circuit under the influence of the second preset power value; When the detected temperature change value drops to the fifth preset temperature value and the duration of the second temperature change value being the fifth preset temperature value reaches the second preset detection duration, the control circuit controls the total power output by the power output circuit to recover to the first preset power value.

8. A power distribution circuit, characterized in that, The power distribution circuit includes a control circuit, a power output circuit, and a temperature detection circuit. The input terminal of the temperature detection circuit is electrically connected to the output terminal of the power output circuit, and the output terminal of the temperature detection circuit is electrically connected to the input terminal of the control circuit. The control terminal of the control circuit is electrically connected to the controlled terminal of the power output circuit. The control circuit is used for: The real-time temperature value of the power output circuit sent by the temperature detection circuit is detected. When the real-time temperature value is detected as a first preset temperature value, a first power reduction operation is performed on the power output circuit based on the preset first power reduction detection logic. The first power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the first preset power value. When the real-time temperature value is detected as the second preset temperature value, a second power reduction operation is performed on the power output circuit based on the preset second power reduction detection logic. The second preset temperature value is greater than the first preset temperature value. The second power reduction operation is used to indicate that the total power output by the power output circuit is reduced to the second preset power value, which is less than the first preset power value. When the real-time temperature value is detected as the third preset temperature value, a third power reduction operation is performed on the power output circuit based on the pre-acquired second power reduction allocation table; the third preset temperature value is greater than the second preset temperature value.

9. The power distribution circuit according to claim 8, characterized in that, The power output circuit includes multiple output circuits, each of which is connected in parallel with the others.

10. A charging device, characterized in that, The charging device includes the power distribution circuit as described in any one of claims 8-9.

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