A multi-path charging detection system and method

Abstract

This invention relates to the field of multi-channel charging and discloses a multi-channel charging detection system and method. The multi-channel charging detection system includes: multiple charging units, a voltage detection module, and a main control unit. Each charging unit includes a battery pack insertion port and a relay connecting the battery pack insertion port and the output terminal of a power source. The voltage detection module includes a first voltage detection module connected to the output terminal of the power source and a second voltage detection module corresponding to each of the battery pack insertion ports. The main control unit uses the first voltage detection module to detect whether a charging unit malfunctions when a battery pack is inserted into the battery pack insertion port, and uses the second voltage detection module to detect whether a charging unit malfunctions when a battery pack is not inserted into the battery pack insertion port. This allows for timely detection and fault reporting in the event of relay failure within the charging system, preventing damage to the battery pack.

Description

Technical Field

[0001] This invention relates to the field of multi-channel charging, and particularly to a multi-channel charging detection system and method. Background Technology

[0002] Multi-channel charging systems provide multiple battery pack insertion ports, allowing multiple battery packs to be inserted simultaneously. However, only one battery pack can be charged at a time. Therefore, relays are typically installed in each charging unit path of a multi-channel charging system as switches for each path. Only one relay is allowed to be on at a time within the charging system, while relays in other paths are off.

[0003] However, the inventors discovered that current multi-channel charging systems have at least the following problems: Relays, as mechanical switching structures, have a limited mechanical lifespan. With continuous use, relays may remain in the "on" state, meaning the charging unit path containing the relay remains conductive. The charging system cannot detect this on-state caused by relay failure. In this situation, it's easy for two charging units to be simultaneously conductive. The potential difference between the two battery packs under these conditions can damage the battery packs, creating a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-channel charging detection system and method that can detect relay failures in the charging system in a timely manner and report the fault, thereby preventing damage to the battery pack.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a multi-channel charging detection system, comprising: multiple charging units, a voltage detection module, and a main control unit; each charging unit includes a battery pack insertion port and a relay connecting the battery pack insertion port and the output terminal of a power source; the voltage detection module includes a first voltage detection module connected to the output terminal of the power source and a second voltage detection module correspondingly connected to the battery pack insertion port; the main control unit determines whether the charging unit has malfunctioned based on voltage changes detected by the first voltage detection module and voltage changes detected by the second voltage detection module, wherein the first voltage detection module is used to detect whether the charging unit malfunctions when a battery pack is inserted into the battery pack insertion port, and the second voltage detection module is used to detect whether the charging unit malfunctions when a battery pack is not inserted into the battery pack insertion port.

[0006] Embodiments of the present invention also provide a multi-channel charging detection method, comprising: applying the above-described multi-channel charging detection system, the method comprising: acquiring a voltage value detected by a first voltage detection module, and / or acquiring a voltage value detected by a second voltage detection module; determining whether a charging unit has malfunctioned based on the voltage value change detected by the first voltage detection module, and / or based on the voltage value change detected by the second voltage detection module; wherein, the first voltage detection module is used to detect whether a charging unit has malfunctioned when a battery pack is inserted into the battery pack insertion port, and the second voltage detection module is used to detect whether a charging unit has malfunctioned when a battery pack is not inserted into the battery pack insertion port.

[0007] Compared with the prior art, the embodiments of the present invention add a voltage detection module to the multi-channel charging system. Based on the detected output voltage of the power supply and / or the voltage of the battery pack insertion port of each charging power supply, it can determine whether there is a fault in the charging unit, which facilitates timely repair when the system fails and avoids damage to the battery pack. Furthermore, regardless of whether a battery pack is inserted in the battery pack insertion port, faults can be detected separately by voltage detection modules at different locations, which can improve fault detection efficiency.

[0008] Additionally, the main control unit is configured to, during normal charging, determine if a voltage surge occurs when a battery pack is inserted into the battery pack connector of a charging unit in any idle state, and the first voltage detection module detects such a surge. This allows for the determination of any abnormalities in the charging system based solely on changes in the power supply's output voltage during normal charging, ensuring the safety of the charging unit in a timely manner.

[0009] Additionally, the main control unit is configured to determine that a charging unit has malfunctioned if, when the battery pack connectors of the multiple charging units are inserted into the battery pack and all relays are in the off state, the voltage value detected by the first voltage detection module is less than the open-circuit voltage. This allows for early detection of faults within the charging system during the initialization detection phase, based solely on changes in the power supply's output voltage.

[0010] In addition, the main control unit is used to determine that the charging unit has malfunctioned if any of the second voltage detection modules detects a non-zero voltage value when the power is on and no battery pack is inserted into the battery pack insertion ports of all charging units.

[0011] Furthermore, when the voltage detection module includes a first voltage detection module and a second voltage detection module, the main control unit is configured to determine that the charging unit has malfunctioned if, with all relays in the open state, the first voltage value detected by the first voltage detection module matches the second voltage value detected by any of the second voltage detection modules. By combining the output voltage of the power supply and the voltage of the battery pack connectors of each charging power supply, a comprehensive judgment can be made on whether the charging system is faulty, thereby improving the accuracy of fault identification.

[0012] In addition, the charging unit also includes a prompting module; the main control unit is used to, when a fault is determined in the charging unit, provide a prompt through the prompting module corresponding to the faulty charging unit if the faulty charging unit's path is identified. By setting up a prompting module, the faulty charging unit path can be more easily located, improving the efficiency of troubleshooting.

[0013] In addition, the main control unit is configured to determine that the charging unit is working normally if the voltage value detected by the first voltage detection module decreases to the battery pack voltage when the battery pack insertion port of the charging unit is inserted and the relay corresponding to the charging unit that needs to be charged is turned on.

[0014] In addition, the main control unit is used to determine that the charging unit is working normally if the voltage value detected by the first voltage detection module recovers from the battery pack voltage to the no-load voltage when the relay of the charging unit providing charging is disconnected after normal charging is completed.

[0015] In addition, the main control unit is used to determine the charging unit that needs to be charged by detecting the charging control CO signal and the discharging control DO signal. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the structure of a multi-channel charging detection system including a first voltage detection module according to an embodiment of the present invention;

[0018] Figure 2 This is yet another structural schematic diagram of a multi-channel charging detection system including a first voltage detection module according to an embodiment of the present invention;

[0019] Figure 3This is a schematic diagram of the structure of a multi-channel charging detection system including a second voltage detection module according to an embodiment of the present invention;

[0020] Figure 4 This is yet another structural schematic diagram of a multi-channel charging detection system including a second voltage detection module according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of a multi-channel charging detection system including multiple voltage detection modules according to an embodiment of the present invention;

[0022] Figure 6 This is yet another structural schematic diagram of a multi-channel charging detection system including multiple voltage detection modules according to an embodiment of the present invention;

[0023] Figure 7 This is a flowchart of a multi-channel charging detection method according to an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to enable the reader to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0025] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.

[0026] Embodiments of the present invention relate to a multi-channel charging detection system, such as... Figures 1 to 4As shown, the multi-channel charging detection system includes: multiple charging units 10, voltage detection modules, and a main control unit 30. Each charging unit 10 includes a battery pack insertion port 12 and a relay 11 connecting the battery pack insertion port 12 and the output terminal of a power supply 60. The voltage detection module is either a first voltage detection module 201 connected to the output terminal of the power supply 60, or a second voltage detection module 202 corresponding to the battery pack insertion port 12. The main control unit 30 determines whether a charging unit 10 has malfunctioned based on the voltage changes detected by the first voltage detection module 201 and / or the voltage changes detected by the second voltage detection module 202. Specifically, the first voltage detection module 201 detects whether a charging unit 10 has malfunctioned when a battery pack is inserted into the battery pack insertion port, and the second voltage detection module 202 detects whether a charging unit 10 has malfunctioned when a battery pack is not inserted into the battery pack insertion port. The first voltage detection module 201 may be one or more corresponding to the charging unit 10; the second voltage detection module 202 may be one or more corresponding to the battery pack insertion port 12.

[0027] Compared with the prior art, the embodiments of the present invention add a voltage detection module to the multi-channel charging system. Based on the detected output voltage of the power supply and / or the voltage of the battery pack insertion port 12 of each charging power supply, it can determine whether there is a fault in the charging unit 10, which facilitates timely repair in case of system failure and avoids damage to the battery pack. Furthermore, regardless of whether a battery pack is inserted in the battery pack insertion port 12, faults can be detected separately by voltage detection modules at different positions, which can improve fault detection efficiency.

[0028] The following is a detailed description of the specific structure and application details of the multi-channel charging detection system of this embodiment. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0029] In a multi-channel charging detection system, if only the first voltage detection module 201 connected to the output terminal of the power supply is set up, such as Figures 1 to 2 As shown, the first voltage detection module 201 is connected to the power output port of the main control module 30 (charger system). The normal operating procedure of the multi-channel charging detection system at this time includes:

[0030] Power supply 60 is connected to the multi-channel charging detection system, and initialization processing is performed on the system. During the initialization detection phase, all relays 11 of charging units 10 are in the open state. At this time, the first voltage detection module 201 normally detects that the voltage at the power supply output terminal is the no-load voltage. If the voltage detected by the first voltage detection module 201 is within the normal range, it indicates that no fault has occurred in the charging unit 10 at this stage. To ensure that all relays 11 are in the open state, such as... Figure 2 As shown, it can be controlled by connecting the main output switch between the power output terminal and relay 11.

[0031] Next, we will verify whether the charging unit 10 can work normally with or without a battery pack inserted into the battery pack connector 12:

[0032] When no battery packs are inserted into any of the battery pack insertion ports 12 in the system, the first voltage detection module 201 normally detects that the voltage at the power output terminal is an open-circuit voltage. After confirming that the voltage detected by the first voltage detection module 201 is normal, one or more battery packs are inserted into the battery pack insertion ports 12. The main control unit will identify the charging unit 10 corresponding to one of the battery packs and control the relay 11 in that charging unit 10 to open, causing the charging unit 10 to conduct and charge the battery pack. During the charging phase, the first voltage detection module 201 normally detects that the voltage at the power output terminal will pull down the voltage of the battery pack being charged. By observing the change in the voltage value detected by the first voltage detection module 201, it can be determined whether a system fault has occurred. When the charging of that battery pack is complete, the relay 11 opens, and the voltage at the power output terminal, normally detected by the first voltage detection module 201, will return to the open-circuit voltage.

[0033] After the battery pack is fully charged, the main control unit will determine if there are other battery packs waiting to be charged in the system. If so, it will control the relay 11 of the charging unit 10 in other circuits to turn on, so that the charging unit 10 can conduct to charge the battery pack. During the charging phase, the first voltage detection module 201 will normally detect that the voltage at the power output terminal will pull down the voltage of the battery pack being charged. This is the same as the voltage change at the power output terminal detected during the charging phase and the charging completion phase, and will not be repeated here to avoid repetition.

[0034] Furthermore, when multiple battery packs are simultaneously inserted at the battery pack insertion port 12, since only one charging unit 10 remains active at any given time, the main control unit needs to select the charging path. Specifically, this can be achieved by detecting the battery pack voltage, charging control CO signal, and discharging control DO signal at each battery pack insertion port 12, and then using logical judgment to determine the charging unit 10 that needs charging. For example, based on the remaining charge of the inserted battery packs, the charging unit 10 with the lower detected battery pack voltage and the larger the difference between the charging control CO signal and the discharging control DO signal can be prioritized for charging.

[0035] Contrary to normal system operation, the voltage changes detected by the first voltage detection module 201 can be used to detect whether the charging unit 10 malfunctions when the battery pack is inserted into the battery pack connector port 12, and to determine the system's fault condition. The specific judgment method is as follows:

[0036] Power supply 60 is connected to the multi-channel charging detection system to perform initialization processing on the multi-channel charging detection system. During the initialization detection phase, the relays 11 of all charging units 10 are in the off state. If the voltage detected by the first voltage detection module 201 is different from the open-circuit voltage at this time, it indicates that there is a short circuit problem in the system and the system enters a fault state.

[0037] Secondly, when a battery pack is inserted into the battery pack connector 12, the system malfunctions as follows:

[0038] With no battery packs inserted into any of the battery pack connection ports 12 in the system, and after confirming that the voltage detected by the first voltage detection module 201 is normal (detected as no-load voltage), all relays 11 in the system remain in the open state. Battery packs are then sequentially inserted into the battery pack connection ports 12 of each charging unit 10, ensuring that only one battery pack is always inserted at any given time. Each time a battery pack is inserted, the voltage detected by the first voltage detection module 201 is checked for changes. If the voltage detected by the first voltage detection module 201 remains at the no-load voltage, the charging unit 10 with the inserted battery pack is operating normally, and the relay 11 in that circuit is not faulty. If the voltage detected by the first voltage detection module 201 decreases from the original no-load voltage to the battery pack voltage, the charging unit 10 with the inserted battery pack has malfunctioned, and the relay 11 in that circuit has failed.

[0039] In addition, to reduce the insertion of battery packs, multiple battery packs can be inserted into the battery pack insertion port 12 of the charging unit 10 while keeping all relays 11 in the system in the off state. Similarly, if the voltage detected by the first voltage detection module 201 drops from the original no-load voltage to the battery pack voltage, then at least one of the charging units 10 with inserted battery packs is faulty, and there is a situation where relays 11 are malfunctioning. Further investigation is needed to find the specific path where the fault occurred, and the system enters a fault state.

[0040] The above fault detection method is a detection strategy performed during the initialization phase, i.e., when relay 11 is in the open state. In addition, during the charging process, the voltage change detected by the first voltage detection module 201 can also be used to determine whether a system fault has occurred. The fault determination method is as follows:

[0041] During the normal charging process of a battery pack inserted into a charging unit 10, if a battery pack is inserted into the battery pack insertion port 12 of any idle charging unit 10, under normal circumstances, since the charging unit 10 with the newly inserted battery pack is in an open state, the addition of the battery pack will not affect the voltage detected by the first voltage detection module 201; that is, the voltage detected by the first voltage detection module 201 remains unchanged. However, if the charging unit 10 with the newly inserted battery pack is in a faulty state, that is, if the relay 11 in that charging unit 10 fails and causes the circuit to conduct, there will be two charging units 10 conducting in the system. Due to the voltage difference between the battery packs, mutual charging will occur between the battery packs. At this time, the voltage detected by the first voltage detection module 201 will suddenly increase or decrease, resulting in a voltage surge. Therefore, if the first voltage detection module 201 detects a voltage surge when a new battery pack is inserted, it means that the charging unit 10 with the newly inserted battery pack is faulty, and the relay 11 in that circuit has failed.

[0042] In a multi-channel charging detection system, if only a second voltage detection module 202 is set up corresponding to the battery pack plug-in port 12, such as Figures 3 to 4 As shown, the second voltage detection module 202 in each charging unit 10 is connected to the battery pack connector 12. The normal operating procedure of the multi-channel charging detection system at this time includes:

[0043] Power supply 60 is connected to the multi-channel charging detection system to perform initialization processing. During the initialization detection phase, the relays 11 of all charging units 10 are in the off state, and the voltage detected by all second voltage detection modules 202 is 0. If the relays 11 of the charging unit 10 are turned on, the voltage detected by the second voltage detection module 202 in that charging unit 10 is the no-load voltage.

[0044] Secondly, when a battery pack is inserted into the battery pack connector port, regardless of whether the relay 11 in the charging unit 10 is in the open state, the voltage detected by the second voltage detection module 202 in the charging unit 10 is the battery pack voltage.

[0045] Contrary to normal system operation, the voltage change detected by the second voltage detection module 202 can determine whether the charging unit 10 has malfunctioned when the battery pack insertion port 12 is not plugged in. The specific determination method is as follows:

[0046] When the power supply 60 is connected to the multi-channel charging detection system, the multi-channel charging detection system is initialized. During the initialization detection phase, all relays 11 of the charging units 10 are in the off state, and no battery pack is inserted into the battery pack insertion ports 12 of all charging units 10. If any voltage value detected by the second voltage detection module 202 is not 0, it is determined that the charging unit 10 with the non-zero voltage value has failed, and the relay 11 of the charging unit 10 is ineffective.

[0047] In a multi-channel charging detection system, a first voltage detection module 201 connected to the output terminal of the power supply and a second voltage detection module 202 respectively connected to the battery pack insertion port 12 are provided. Figures 5 to 6 As shown, the first voltage detection module 201 is connected to the power output port of the main control module 30 (charger system), and the second voltage detection module 202 in each charging unit 10 is connected to the battery pack insertion port 12. The normal operating procedure of the multi-channel charging detection system at this time includes:

[0048] Power supply 60 is connected to the multi-channel charging detection system, and the system is initialized. During the initialization detection phase, all relays 11 of charging units 10 are in the off state. At this time, the first voltage detection module 201 normally detects that the voltage at the power supply output terminal is an open-circuit voltage, and all second voltage detection modules 202 detect a voltage of 0. If the relays 11 of charging unit 10 are turned on, the second voltage detection module 202 in that charging unit 10 will detect an open-circuit voltage, and the first voltage detection module 201 will detect that the voltage at the power supply output terminal remains an open-circuit voltage.

[0049] Next, we will verify whether the charging unit 10 can work normally with or without a battery pack inserted into the battery pack connector 12:

[0050] When no battery packs are inserted into any of the battery pack insertion ports 12 in the system, the first voltage detection module 201 normally detects that the voltage at the power output terminal is an open-circuit voltage. After confirming that the voltage detected by the first voltage detection module 201 is normal, one or more battery packs are inserted into the battery pack insertion ports 12. The main control unit will identify the charging unit 10 corresponding to one of the battery packs and control the relay 11 in that charging unit 10 to turn on, causing the charging unit 10 to conduct and charge the battery pack. During the charging phase, the voltage detected by the first voltage detection module 201 normally at the power output terminal will be pulled down to the voltage of the charging battery pack, and the voltage detected by the second voltage detection module 202 corresponding to the conducting charging unit 10 will rise from 0 to the battery pack voltage. The voltages detected by the second voltage detection modules 202 of the other paths will remain at 0. By observing the changes in the voltage values ​​detected by the first voltage detection module 201 and the second voltage detection module 202, it can be determined whether a system fault has occurred. When the battery pack is fully charged, relay 11 is disconnected. The first voltage detection module 201 will detect that the voltage at the power output terminal will return to the no-load voltage. And when the battery pack is not removed, the voltage detected by the second voltage detection module 202 will remain at the battery pack voltage until the battery pack is removed, at which point the voltage of the second voltage detection module 202 will drop to 0.

[0051] In summary, when the system is functioning correctly, the voltage values ​​detected by the first voltage detection module 201 and the second voltage detection module 202 can be summarized as follows:

[0052] Voltage value of the first voltage detection module Voltage value of the second voltage detection module No battery pack inserted, and all relays are in the off state. Open circuit voltage No voltage No battery pack inserted, and all relays are in the ON state. Open circuit voltage Open circuit voltage A battery pack is inserted, and all relays are in the off state. Open circuit voltage The voltage is the battery pack voltage when the battery pack is inserted; otherwise, it is 0. A battery pack is inserted, and the relay in the battery pack insertion path is in the ON state. Battery pack voltage The voltage is the battery pack voltage when the battery pack is inserted; otherwise, it is 0.

[0053] Contrary to the normal operation of the system described above, system fault conditions can be determined by the voltage changes detected by the first voltage detection module 201 and the second voltage detection module 202. If the voltage values ​​detected by the first voltage detection module 201 and / or the second voltage detection module 202 in each of the situations in the table above do not conform to the values ​​under normal conditions, it indicates that there is a fault in the system. Several specific fault conditions are illustrated below:

[0054] When the power supply 60 is connected to the multi-channel charging detection system, the multi-channel charging detection system is initialized. During the initialization detection phase, all relays 11 of the charging units 10 are in the off state, and no battery pack is inserted into the battery pack insertion ports 12 of all charging units 10. If any voltage value detected by the second voltage detection module 202 is not 0, it is determined that the charging unit 10 with the non-zero voltage value has failed, and the relay 11 of the charging unit 10 is ineffective.

[0055] Power supply 60 is connected to the multi-channel charging detection system and initializes the system. During the initialization detection phase, all relays 11 of the charging units 10 are in the off state. If the voltage detected by the first voltage detection module 201 is different from the open-circuit voltage and matches the second voltage value detected by at least one second voltage detection module 202, it indicates that at least one charging unit 10 is in the on state. Therefore, the power supply output voltage and the battery pack voltage must be the same for the first voltage value detected by the first voltage detection module 201 to match the second voltage value detected by any second voltage detection module 202. The charging unit 10 where the second voltage detection module 202 that matches the first voltage value detected by the first voltage detection module 201 is located is faulty, and the relay 11 of that channel is ineffective.

[0056] In addition, to facilitate staff understanding of system malfunctions, charging unit 10 is equipped with a prompting module. When a malfunction is confirmed in charging unit 10, if the path of the malfunctioning charging unit 10 is identified, a prompting module corresponding to that path will provide an alert. The prompting module includes indicator lights; each charging unit 10 can have a separate fault light. When a malfunction is confirmed in charging unit 10, if the path of the malfunctioning charging unit 10 is identified, the indicator light corresponding to that path will illuminate to indicate the faulty path and facilitate fault location. Alternatively, a master fault light can be set throughout the system to warn of a system malfunction when the path of the fault cannot be identified.

[0057] In addition, a fuse for circuit protection is installed after the relay of each charging unit 10. If multiple charging units 10 are turned on and mutual charging between battery packs occurs due to relay failure, the fuse will automatically disconnect due to voltage changes to protect the circuit.

[0058] This invention also relates to a multi-channel charging detection method, which utilizes the aforementioned multi-channel charging detection system. The method implementation process is as follows: Figure 7 As shown, it includes:

[0059] Step 701: Obtain the voltage value detected by the first voltage detection module and the voltage value detected by the second voltage detection module;

[0060] Step 702: Based on the voltage value changes detected by the first voltage detection module and the voltage value changes detected by the second voltage detection module, determine whether the charging unit has malfunctioned.

[0061] The first voltage detection module is used to detect whether the charging unit malfunctions when the battery pack is inserted into the battery pack connector port, and the second voltage detection module is used to detect whether the charging unit malfunctions when the battery pack is not inserted into the battery pack connector port.

[0062] Based on the detected output voltage of the power supply and / or the voltage of the battery pack connection ports of each charging power supply, it can be determined whether there is a fault in the charging unit, so as to facilitate timely repair in case of system failure and avoid damage to the battery pack.

[0063] The method of determining whether a charging unit has malfunctioned based solely on voltage changes detected by the first voltage detection module or solely on voltage changes detected by the second voltage detection module is consistent with the fault detection method in the aforementioned multi-channel charging detection system embodiment. The relevant technical details mentioned are still valid in this embodiment, and will not be repeated here to avoid repetition. Similarly, in this embodiment, the voltage values ​​detected by the first voltage detection module (output voltage of the power supply) and the voltage values ​​detected by the second voltage detection module (voltages at the battery pack connection ports of each charging power supply) can be combined to comprehensively determine whether the charging system has a fault, which can improve the accuracy of fault identification.

[0064] The steps of the various methods described above are only for clarity. In practice, they can be combined into one step or some steps can be split into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. Adding insignificant modifications or introducing insignificant designs to the algorithm or process, but without changing the core design of the algorithm and process, are also within the scope of protection of this patent.

[0065] This invention also relates to a charging system, including the aforementioned multi-channel charging detection system, a power supply, and several battery packs. The power supply is connected to the main control unit of the multi-channel charging detection system, and the battery packs are plugged into the battery pack connectors of the charging detection system. The power supply provides power to the multi-channel charging detection system and charges the battery packs. The multi-channel charging detection system detects whether there are circuit faults in the entire charging system and whether the charging process will damage the batteries. The fault detection strategy of the multi-channel charging detection system is consistent with the description in the above embodiments, and will not be repeated here to avoid repetition.

[0066] This invention also relates to a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the above-described embodiments of the multi-channel charging detection method.

[0067] That is, those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0068] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A multi-channel charging detection system, characterized in that, include: Multiple charging units, voltage detection module and main control unit; The charging unit includes a battery pack connector and a relay that connects the battery pack connector to the power supply output. The voltage detection module includes a first voltage detection module connected to the output terminal of the power supply, and a second voltage detection module connected to the battery pack plug-in port respectively. The main control unit determines whether the charging unit has malfunctioned by detecting voltage changes through the first voltage detection module and the second voltage detection module. The first voltage detection module detects whether the charging unit malfunctions when a battery pack is inserted into the battery pack connector, while the second voltage detection module detects whether the charging unit malfunctions when a battery pack is not inserted into the battery pack connector. There is one first voltage detection module, and each second voltage detection module corresponds to one of the battery pack connectors. The main control unit is used to, when the power is on, control the relay to disconnect and no battery pack is inserted into the battery pack insertion port of all charging units, and if any of the second voltage detection modules detects a non-zero voltage value, then determine that the charging unit has malfunctioned. The main control unit is used to control the relay to disconnect. If the first voltage value detected by the first voltage detection module matches the second voltage value detected by any second voltage detection module, it is determined that the charging unit where the second voltage detection module that matches the first voltage value detected by the first voltage detection module is located has a fault.

2. The multi-channel charging detection system according to claim 1, characterized in that, The main control unit is used to determine that the charging unit has malfunctioned if, during normal charging, a battery pack is inserted into the battery pack connector of the charging unit in any idle state, and the first voltage detection module detects a voltage surge.

3. The multi-channel charging detection system according to claim 1, characterized in that, The main control unit is used to determine that the charging unit has malfunctioned when the battery pack insertion ports of the multiple charging units are inserted into the battery pack and all relays are in the off state, and the voltage value detected by the first voltage detection module is less than the no-load voltage.

4. The multi-channel charging detection system according to any one of claims 1 to 3, characterized in that, The charging unit further includes: a notification module; The main control unit is used to, when it is determined that a charging unit has malfunctioned, provide a prompt through the prompt module corresponding to the malfunctioning charging unit if the path of the malfunctioning charging unit is identified.

5. The multi-channel charging detection system according to claim 1, characterized in that, The main control unit is configured to determine that the charging unit is working normally if the voltage detected by the first voltage detection module is reduced to the battery pack voltage when the battery pack insertion port of the charging unit is inserted and the relay corresponding to the charging unit that needs to be charged is turned on.

6. The multi-channel charging detection system according to claim 5, characterized in that, The main control unit is used to determine that the charging unit is working normally if, after normal charging is completed and the relay of the charging unit providing charging is disconnected, the voltage value detected by the first voltage detection module recovers from the battery pack voltage to the no-load voltage.

7. The multi-channel charging detection system according to claim 5 or 6, characterized in that, The main control unit is used to determine which charging unit needs to be charged by detecting the charging control CO signal and the discharging control DO signal.

8. A multi-channel charging detection method, characterized in that, The method, applied to the multi-channel charging detection system as described in any one of claims 1 to 7, comprises: Obtain the voltage value detected by the first voltage detection module and the voltage value detected by the second voltage detection module; Based on the voltage value changes detected by the first voltage detection module and the voltage value changes detected by the second voltage detection module, it is determined whether the charging unit has malfunctioned; wherein, the first voltage detection module is used to detect whether the charging unit has malfunctioned when the battery pack insertion port is plugged into the battery pack, and the second voltage detection module is used to detect whether the charging unit has malfunctioned when the battery pack insertion port is not plugged into the battery pack. If the first voltage value detected by the first voltage detection module matches the second voltage value detected by any of the second voltage detection modules, then it is determined that the charging unit where the second voltage detection module that matches the first voltage value detected by the first voltage detection module is located is faulty.

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