Multipath charging detection system and method

Abstract

The embodiment of the invention relates to the field of multi-path charging, and discloses a multi-path charging detection system and method. The multi-path charging detection system comprises a plurality of charging units, a voltage detection module and a main control unit, the charging unit comprises a battery pack plugging port and a relay connected with the battery pack plugging port and the output end of the power supply; the voltage detection module comprises a first voltage detection module connected with the output end of a power supply and a second voltage detection module correspondingly connected with the battery pack plugging ports respectively; the main control unit detects whether the charging unit breaks down or not through the first voltage detection module under the condition that the battery pack plugging port is plugged into the battery pack, and detects whether the charging unit breaks down or not through the second voltage detection module under the condition that the battery pack plugging port is not plugged into the battery pack. Therefore, the charging system can be detected in time under the condition that a relay fails in the charging system, fault repair is carried out, and the battery pack is prevented from being damaged.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of multi-channel charging, and in particular to a multi-channel charging detection system and method. Background Art

[0002] The multi-channel charging system provides multiple battery pack plug-in ports, which can allow multiple battery packs to be plugged in at the same time, but only one battery pack can be charged at the same time. Therefore, in the multi-channel charging system, relays are usually set in each charging unit channel as switches for each channel. Only one relay is allowed to be in the on state at the same time in the charging system, and the relays of other channels are all in the off state.

[0003] However, the inventors have found that the current multi-channel charging system has at least the following problems: the relay, as a mechanical switch structure, has a limited mechanical service life. With the continuous use of the relay, the relay may be in the open state all the time, that is, the charging unit path where the relay is located is always in the conductive state, and the charging system cannot detect the open state caused by the failure of the relay. In this case, it is easy for two charging units in the charging system to be in the conductive state at the same time, and the potential difference between the two battery packs when the two charging units are conductive at the same time will cause the battery pack to be damaged, causing safety hazards. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a multi-channel charging detection system and method, which can detect relay failure in the charging system in a timely manner and perform fault repair to avoid damage to the battery pack.

[0005] To solve the above technical problems, an embodiment of the present invention provides a multi-channel charging detection system, including: multiple charging units, a voltage detection module and a main control unit; the charging unit includes a battery pack plug-in port, and a relay connecting the battery pack plug-in port and the output end of a power supply; the voltage detection module includes a first voltage detection module connected to the output end of the power supply, and a second voltage detection module respectively connected to the battery pack plug-in port; the main control unit determines whether the charging unit fails through the voltage value change detected by the first voltage detection module and the voltage value change detected by the second voltage detection module, wherein the first voltage detection module is used to detect whether the charging unit fails when a battery pack is inserted into the battery pack plug-in port, and the second voltage detection module is used to detect whether the charging unit fails when a battery pack is not inserted into the battery pack plug-in port.

[0006] An embodiment of the present invention also provides a multi-channel charging detection method, including: applying the above-mentioned multi-channel charging detection system, the method includes: obtaining a voltage value detected by a first voltage detection module, and / or obtaining a voltage value detected by a second voltage detection module; judging whether a charging unit fails according to a change in the voltage value detected by the first voltage detection module, and / or according to a change in the voltage value detected by the second voltage detection module; wherein the first voltage detection module is used to detect whether a charging unit fails when a battery pack is inserted into the battery pack plug-in port, and the second voltage detection module is used to detect whether a charging unit fails when a battery pack is not inserted into the battery pack plug-in port.

[0007] Compared with the prior art, the embodiments of the present invention add a voltage detection module to the multi-channel charging system, and determine whether there is a fault in the charging unit based on the detected output voltage of the power supply and / or the voltage of the battery pack plug-in port of each charging power supply, so as to facilitate timely maintenance when the system fails and avoid damage to the battery pack. In addition, when there is a battery pack inserted in the battery pack plug-in port, the fault can be detected separately by voltage detection modules at different positions, which can improve the efficiency of fault detection.

[0008] In addition, the main control unit is used to determine that the charging unit has a fault if the first voltage detection module detects a sudden voltage change when a battery pack is inserted into the battery pack plug-in port of any idle charging unit during normal charging. In this way, it is possible to determine whether there is an abnormality in the current charging system based only on the change in the output voltage of the power supply during normal charging, and ensure the safety of the charging unit in a timely manner during the charging process.

[0009] In addition, the main control unit is used to determine that the charging unit has a fault if the voltage value detected by the first voltage detection module is less than the no-load voltage when the battery pack plug-in ports of the multiple charging units are plugged into the battery pack and all relays are in the disconnected state. In this way, it is possible to detect in advance whether there is a fault in the charging system during the initialization detection stage of the charging system based only on the change in the output voltage of the power supply.

[0010] In addition, the main control unit is used to determine that the charging unit has a fault 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 plug-in ports of all the charging units.

[0011] In addition, when the voltage detection module includes a first voltage detection module and a second voltage detection module, the main control unit is used to determine that the charging unit has a fault if the first voltage value detected by the first voltage detection module matches the second voltage value detected by any second voltage detection module when all relays are in the disconnected state. By combining the output voltage of the power supply and the voltage of the battery pack plug-in port of each charging power supply, it is comprehensively judged whether there is a fault in the charging system, which can improve the accuracy of fault identification.

[0012] In addition, the charging unit also includes: a prompt module; the main control unit is used to, when determining that the charging unit has a fault, if the path of the charging unit with the fault is determined, give a prompt through the prompt module corresponding to the path. By setting the prompt module, the path of the charging unit with the fault can be better located, and the efficiency of solving the fault problem can be improved.

[0013] In addition, the main control unit is used to, if it is determined that the detection result of the first voltage detection module is a no-load voltage, and a battery pack is inserted into the battery pack plug port of the charging unit, and the relay corresponding to the charging unit that needs to be charged is turned on, the voltage value detected by the first voltage detection module is reduced to the battery pack voltage, then it is determined that the charging unit is working normally.

[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 provide charging through the detected charging control CO signal and the discharging control DO signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 is a structural schematic diagram of a multi-channel charging detection system including a first voltage detection module according to an embodiment of the present invention; Figure 2 is 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; Figure 3 is a structural schematic diagram of a multi-channel charging detection system including a second voltage detection module according to an embodiment of the present invention; Figure 4 is 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; Figure 5 is a structural schematic diagram of a multi-channel charging detection system including multiple voltage detection modules according to an embodiment of the present invention; Figure 6 is another structural schematic diagram of a multi-channel charging detection system including multiple voltage detection modules according to an embodiment of the present invention; Figure 7 is a flow chart of a multi-channel charging detection method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can be implemented.

[0019] The following embodiments are divided for the convenience of description and shall not constitute any limitation on the specific implementation of the present invention. The embodiments may be combined with each other and referenced to each other without contradiction.

[0020] The embodiment of the present invention relates to a multi-channel charging detection system, such as Figures 1 to 4 As shown, the multi-channel charging detection system includes: multiple charging units 10, voltage detection modules and a main control unit 30; the charging unit 10 includes a battery pack plug port 12, and a relay 11 connecting the battery pack plug port 12 and the output end of the power supply 60; the voltage detection module is a first voltage detection module 201 connected to the output end of the power supply 60, and / or the voltage detection module is a second voltage detection module 202 respectively connected to the battery pack plug port 12; the main control unit 30 determines whether the charging unit 10 has a fault through the voltage value change detected by the first voltage detection module 201 and / or the voltage value change detected by the second voltage detection module 202; wherein the first voltage detection module 201 is used to detect whether the charging unit 10 has a fault when the battery pack plug port is inserted into the battery pack, and the second voltage detection module 202 is used to detect whether the charging unit 10 has a fault when the battery pack plug port is not inserted into the battery pack. The first voltage detection module 201 is one or multiple corresponding to the charging unit 10; the second voltage detection module 202 is one or multiple corresponding to the battery pack plug port 12.

[0021] Compared with the prior art, the embodiment of the present invention adds a voltage detection module to the multi-channel charging system, and determines whether there is a fault in the charging unit 10 according to the detected output voltage of the power source and / or the voltage of the battery pack plug-in port 12 of each charging power source, so as to facilitate timely maintenance when the system fails and avoid damage to the battery pack. In addition, when there is a battery pack inserted in the battery pack plug-in port 12, the fault can be detected separately by voltage detection modules at different positions, which can improve the efficiency of fault detection.

[0022] The specific structure and system application details of the multi-channel charging detection system of this embodiment are described in detail below. The following content is only the implementation details provided for the convenience of understanding and is not necessary for the implementation of this solution.

[0023] In the case where only the first voltage detection module 201 connected to the output end of the power supply is provided in the multi-channel charging detection system, as shown in FIG. Figure 1 to Figure 2 As shown, the first voltage detection module 201 is connected to the power output port of the main control module 30 (charger system). At this time, the normal working process of the multi-channel charging detection system includes: The power supply 60 is connected to the multi-channel charging detection system, and the multi-channel charging detection system is initialized. In the initialization detection stage, the relays 11 of all charging units 10 are in the disconnected state. At this time, the first voltage detection module 201 normally detects that the voltage at the power output end is a no-load voltage. If the voltage detected by the first voltage detection module 201 meets the normal conditions, it means that the charging unit 10 is not faulty at the current stage. To ensure that all relays 11 are in the disconnected state, such as Figure 2 As shown, control can be performed by connecting the output main switch between the power output terminal and the relay 11.

[0024] Secondly, verify whether the charging unit 10 can work normally when the battery pack is inserted into the battery pack insertion port 12 or not: In the case that no battery pack is inserted into all the battery pack plug-in ports 12 in the system, the first voltage detection module 201 normally detects that the voltage at the power output end is a no-load voltage. After determining that there is no abnormality in the voltage detected by the first voltage detection module 201, one or more battery packs are inserted into the battery pack plug-in port 12. The main control unit will determine the charging unit 10 corresponding to one of the battery packs, and control the relay 11 in the charging unit 10 to turn on, so that the charging unit 10 is turned on to charge the battery pack. During the charging stage, the first voltage detection module 201 normally detects that the voltage at the power output end will be pulled down to the voltage of the charged battery pack. The change in the voltage value detected by the first voltage detection module 201 can be used to determine whether the system has a fault at this time. When the battery pack is fully charged, the relay 11 is disconnected, and the first voltage detection module 201 normally detects that the voltage at the power output end will return to the no-load voltage.

[0025] After the battery pack is charged, the main control unit will determine whether there are other battery packs to be charged in the system. If there are, the main control unit will control the relay 11 of the charging unit 10 in other circuits to turn on, so that the charging unit 10 is turned on to charge the battery pack. During the charging stage, the first voltage detection module 201 normally detects that the voltage at the power output end will be pulled down to the voltage of the charged battery pack, which is the same as the change in the voltage at the power output end detected during the above-mentioned charging stage and the charging completion stage. To avoid repetition, it will not be repeated again.

[0026] In addition, when there are multiple battery packs plugged into the battery pack plug port 12 at the same time, since only one charging unit 10 in the system remains on at the same time, the main control unit needs to select the path that needs to be charged. Specifically, the charging unit 10 that needs to be charged can be determined based on logical judgment according to the battery pack voltage, charging control CO signal and discharge control DO signal detected at each battery pack plug port 12. For example, the charging unit 10 is selected based on the remaining power of the inserted battery pack. The charging unit 10 with the smaller battery pack voltage detected at the battery pack plug port 12 and the larger difference between the charging control CO signal and the discharge control DO signal can be selected to complete the charging first.

[0027] Contrary to the normal operation of the system, the voltage change detected by the first voltage detection module 201 can be used to detect whether the charging unit 10 fails when the battery pack plug port 12 is plugged into the battery pack, and determine the fault condition of the system. The specific judgment method is as follows: The power supply 60 is connected to the multi-channel charging detection system, and the multi-channel charging detection system is initialized. During the initialization detection stage, the relays 11 of all charging units 10 are in the disconnected state. If the voltage detected by the first voltage detection module 201 is different from the no-load voltage at this time, it means that there is a short circuit problem in the system and the system enters a fault state.

[0028] Secondly, when a battery pack is inserted into the battery pack plug port 12, the system fails as follows: When no battery pack is inserted into any of the battery pack plug-in ports 12 in the system, after determining that the voltage detected by the first voltage detection module 201 is not abnormal (detected as a no-load voltage), all relays 11 in the system are kept in a disconnected state, and battery packs are inserted into the battery pack plug-in ports 12 of each charging unit 10 in turn, and it is ensured that only one battery pack is always inserted in the system. Check whether the voltage detected by the first voltage detection module 201 changes each time a battery pack is inserted. If the voltage detected by the first voltage detection module 201 remains at a no-load voltage, the charging unit 10 inserted with the battery pack is operating normally, and the relay 11 in the circuit has not failed. If the voltage detected by the first voltage detection module 201 starts to drop from the original no-load voltage to the battery pack voltage, then the charging unit 10 inserted with the battery pack is faulty at this time, and the relay 11 in the circuit has failed.

[0029] In addition, in order to reduce the insertion action of the battery pack, multiple battery packs can be inserted into the battery pack plug-in port 12 of the charging unit 10 while keeping all the relays 11 in the system in the disconnected 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 this time, at least one of all the charging units 10 inserted into the battery pack has a fault, and the relay 11 has failed. It is necessary to further investigate the specific path where the fault occurs, and the system enters a fault state.

[0030] The above fault detection method is a detection strategy performed in the initialization stage, that is, when the relay 11 is in the disconnected state. In addition, the voltage change detected by the first voltage detection module 201 during the charging process can be used to determine whether the system has a fault. The fault judgment method is as follows: When the power supply is normally charging the battery pack inserted in one charging unit 10, a battery pack is inserted into the battery pack plug-in port 12 of any idle charging unit 10. Under normal circumstances, since the charging unit 10 newly inserted with the battery pack is in a disconnected state, the action of the newly added 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 newly inserted with the battery pack is in a faulty state, that is, the relay 11 in the charging unit 10 fails and causes the circuit to be turned on, there are two charging units 10 turned on in the system, and due to the voltage difference between the battery packs, the battery packs will charge each other. At this time, the voltage detected by the first voltage detection module 201 will suddenly increase or decrease, and a voltage mutation will occur. Therefore, if the first voltage detection module 201 detects a voltage mutation when the battery pack is newly inserted, it means that the charging unit 10 newly inserted with the battery pack is faulty and the relay 11 of the charging unit 10 fails.

[0031] In the case where only the second voltage detection modules 202 are respectively connected to the battery pack plug-in ports 12 in the multi-channel charging detection system, as shown in FIG. Figure 3 to Figure 4 As shown, the second voltage detection module 202 in each charging unit 10 is connected to the battery pack plug port 12. At this time, the normal working process of the multi-channel charging detection system includes: The power supply 60 is connected to the multi-channel charging detection system to initialize the multi-channel charging detection system. In the initialization detection stage, the relays 11 of all charging units 10 are in the disconnected state, and at this time, the voltages detected by all second voltage detection modules 202 are 0. If the relay 11 of the charging unit 10 is turned on, the voltage detected by the second voltage detection module 202 in the charging unit 10 is the no-load voltage.

[0032] Secondly, when a battery pack is inserted into the battery pack connector, no matter whether the relay 11 in the charging unit 10 is in an on state, the voltage detected by the second voltage detection module 202 in the charging unit 10 is the battery pack voltage.

[0033] Contrary to the normal operation of the system, the voltage change detected by the second voltage detection module 202 can be used to determine whether the charging unit 10 fails when the battery pack plug-in port 12 is not plugged into the battery pack. The specific judgment method is as follows: The power supply 60 is connected to the multi-channel charging detection system to initialize the multi-channel charging detection system. In the initialization detection stage, the relays 11 of all charging units 10 are in the disconnected state, and no battery packs are inserted into the battery pack plug-in 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 a voltage value not 0 has a fault, and the relay 11 of the charging unit 10 fails.

[0034] In the case where a first voltage detection module 201 connected to the output end of the power supply and a second voltage detection module 202 connected to the battery pack plug-in port 12 are respectively provided in the multi-channel charging detection system, as shown in FIG. Figures 5 and 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 plug port 12. At this time, the normal working process of the multi-channel charging detection system includes: The power supply 60 is connected to the multi-channel charging detection system, and the multi-channel charging detection system is initialized. In the initialization detection stage, the relays 11 of all charging units 10 are in the disconnected state. At this time, the first voltage detection module 201 normally detects that the voltage at the power output end is a no-load voltage, and the voltages detected by all second voltage detection modules 202 are 0. If the relay 11 of the charging unit 10 is turned on, the voltage detected by the second voltage detection module 202 in the charging unit 10 is a no-load voltage, and the voltage detected by the first voltage detection module 201 at the power output end remains at a no-load voltage.

[0035] Secondly, verify whether the charging unit 10 can work normally when the battery pack is inserted into the battery pack insertion port 12 or not: When no battery pack is inserted into any of the battery pack plug-in ports 12 in the system, the first voltage detection module 201 normally detects that the voltage at the power output end is a no-load voltage. After determining that the voltage detected by the first voltage detection module 201 is normal, insert one or more battery packs into the battery pack plug-in port 12, and the main control unit determines the charging unit 10 corresponding to one of the battery packs, and controls the relay 11 in the charging unit 10 to turn on, so that the charging unit 10 is turned on to charge the battery pack. During the charging stage, the first voltage detection module 201 normally detects that the voltage at the power output end will be pulled down to the charged battery pack voltage, and the voltage detected by the second voltage detection module 202 corresponding to the turned-on charging unit 10 is increased from 0 to the battery pack voltage, and the voltage detected by the second voltage detection module 202 of the remaining paths is kept at 0. By 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 the system is faulty at this time. When the charging of the battery pack is completed, the relay 11 is disconnected, and the first voltage detection module 201 normally detects that the voltage at the power output end will be restored to the no-load voltage. In the case that the battery pack is not unplugged, the voltage detected by the second voltage detection module 202 remains at the battery pack voltage until the battery pack is unplugged, and the voltage of the second voltage detection module 202 drops to 0.

[0036] Based on the above, when the system does not fail, the voltage values ​​detected by the first voltage detection module 201 and the second voltage detection module 202 can be summarized as: The voltage value of the first voltage detection module The voltage value of the second voltage detection module No battery pack is inserted and all relays are disconnected No-load voltage No voltage No battery pack is inserted and all relays are turned on No-load voltage No-load voltage A battery pack is inserted and all relays are disconnected No-load voltage The voltage of the battery pack is when there is a battery pack inserted into the path, and the voltage of the battery pack is 0 when there is no battery pack inserted into the path A battery pack is inserted and the relay in the path of the battery pack is turned on Battery pack voltage The voltage of the battery pack is when there is a battery pack inserted into the path, and the voltage of the battery pack is 0 when there is no battery pack inserted into the path Contrary to the normal operation of the above system, the system fault condition can be determined by the voltage change detected by the first voltage detection module 201 and the voltage change detected by the second voltage detection module 202. If the voltage value detected by the first voltage detection module 201 and / or the second voltage detection module 202 in each case in the above table does not conform to the value under normal circumstances, it means that there is a fault in the system. Several specific fault conditions are described as follows: The power supply 60 is connected to the multi-channel charging detection system to initialize the multi-channel charging detection system. In the initialization detection stage, the relays 11 of all charging units 10 are in the disconnected state, and no battery packs are inserted into the battery pack plug-in 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 a voltage value not 0 has a fault, and the relay 11 of the charging unit 10 fails.

[0037] The power supply 60 is connected to the multi-channel charging detection system, and the multi-channel charging detection system is initialized. In the initialization detection stage, the relays 11 of all charging units 10 are in the disconnected state. If the voltage detected by the first voltage detection module 201 is different from the no-load voltage at this time, and matches the second voltage value detected by at least one second voltage detection module 202, this situation occurs, which means that at least one charging unit 10 is in the on state. Therefore, the power output terminal voltage and the battery pack voltage are the same, and the first voltage value detected by the first voltage detection module 201 will 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 has a fault, and the relay 11 of this path fails.

[0038] In addition, in order to facilitate the staff to understand whether the system has a fault, the charging unit 10 is also provided with a prompt module. When it is determined that the charging unit 10 has a fault, if the path of the charging unit 10 where the fault occurs is determined, a prompt is given through the prompt module corresponding to the path. The prompt module includes a prompt light. A fault light can be set in each charging unit 10. When it is determined that the charging unit 10 has a fault, if the path of the charging unit 10 where the fault occurs is determined, the prompt light corresponding to the path is lit to indicate the faulty path and facilitate fault location. A master control fault light can also be set in the entire system to warn the system to enter a fault state when the path where the fault occurs cannot be determined.

[0039] In addition, a fuse for protecting the circuit is set at the rear stage of the relay of each charging unit 10. In the event of relay failure, if multiple charging units 10 are turned on and cause mutual charging between battery packs, the fuse will automatically disconnect due to voltage changes to protect the circuit.

[0040] The embodiment of the present invention also relates to a multi-channel charging detection method, which uses the multi-channel charging detection system described above, and the method implementation process is as follows: Figure 7 As shown, including: Step 701, obtaining a voltage value detected by a first voltage detection module, and obtaining a voltage value detected by a second voltage detection module; Step 702: Determine whether a charging unit fails based on a change in the voltage value detected by the first voltage detection module and a change in the voltage value detected by the second voltage detection module.

[0041] Among them, the first voltage detection module is used to detect whether the charging unit fails when the battery pack plug-in port is inserted into the battery pack, and the second voltage detection module is used to detect whether the charging unit fails when the battery pack plug-in port is not inserted into the battery pack.

[0042] Based on the detected output voltage of the power source and / or the voltage of the battery pack plug-in port of each charging power source, it is determined whether there is a fault in the charging unit, so as to facilitate timely maintenance when the system fails and avoid damage to the battery pack.

[0043] The method of judging whether a charging unit fails based only on the change in the voltage value detected by the first voltage detection module, or based only on the change in the voltage value detected by the second voltage detection module, is consistent with the method of detecting faults in the above-mentioned multi-channel charging detection system embodiment. The relevant technical details mentioned are still valid in this embodiment, and will not be repeated here to reduce repetition. Similarly, in this embodiment, the voltage value detected by the first voltage detection module (the output voltage of the power supply) and the voltage value detected by the second voltage detection module (the voltage of the battery pack plug-in port of each charging power supply) can be combined to comprehensively judge whether there is a fault in the charging system, which can improve the accuracy of fault identification.

[0044] The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed 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 to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0045] The embodiment of the present invention also relates to a charging system, including the above-mentioned multi-channel charging detection system, a power supply and a plurality of battery packs. The power supply is connected to the main control unit of the multi-channel charging detection system, and the battery pack is plugged into the battery pack plug-in port of the charging detection system. The power supply is used to supply energy to the multi-channel charging detection system and provide electrical energy for charging the battery pack. The multi-channel charging detection system is used to detect whether there is a circuit fault in the entire charging system and whether the battery will be damaged during the charging process. The fault detection strategy of the multi-channel charging detection system is consistent with the description of the above embodiment, and in order to reduce repetition, it will not be repeated here.

[0046] The embodiment of the present invention also relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the multi-channel charging detection method embodiment is implemented.

[0047] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0048] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made in form and detail 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 modules and main control units; The charging unit includes a battery pack plug port, and a relay connecting the battery pack plug port and an output end of a power source; The voltage detection module includes a first voltage detection module connected to the output end of the power supply, and a second voltage detection module connected to the battery pack plug-in ports respectively; The main control unit determines whether the charging unit fails by detecting changes in voltage values ​​through the first voltage detection module and changes in voltage values ​​through the second voltage detection module; wherein the first voltage detection module is used to detect whether the charging unit fails when a battery pack is inserted into the battery pack plug-in port, and the second voltage detection module is used to detect whether the charging unit fails when a battery pack is not inserted into the battery pack plug-in port.

2. The multi-channel charging detection system according to claim 1, characterized in that: The main control unit is used to determine that a fault occurs in the charging unit during a normal charging process if a battery pack is inserted into the battery pack plug-in port of the charging unit in any idle state and the first voltage detection module detects a sudden voltage change.

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 a fault if the voltage value detected by the first voltage detection module is less than the no-load voltage when the battery pack plug-in ports of the multiple charging units are inserted into a battery pack and all relays are in a disconnected state.

4. 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 a fault if any of the second voltage detection modules detects a non-zero voltage value when no battery pack is inserted into the battery pack plug-in ports of all the charging units when the power is on.

5. 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 fails if a first voltage value detected by the first voltage detection module matches a second voltage value detected by any second voltage detection module when all relays are in a disconnected state.

6. The multi-channel charging detection system according to any one of claims 1 to 5, characterized in that: The charging unit further includes: a prompt module; The main control unit is used for, when it is determined that the charging unit fails, if a path of the charging unit that fails is determined, to give a prompt through a prompt module corresponding to the path.

7. 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 is working normally if the detection result of the first voltage detection module is determined to be a no-load voltage, and a battery pack is inserted into the battery pack plug port of the charging unit, and the relay corresponding to the charging unit that needs to be charged is turned on, and the voltage value detected by the first voltage detection module is reduced to the battery pack voltage.

8. The multi-channel charging detection system according to claim 7, characterized in that: The main control unit is used to determine that the charging unit is operating 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.

9. The multi-channel charging detection system according to claim 7 or 8, characterized in that: The main control unit is used to determine the charging unit that needs to provide charging through the detected charging control CO signal and the discharging control DO signal.

10. A multi-channel charging detection method, characterized in that: Applied to the multi-channel charging detection system according to any one of claims 1 to 9, the method comprises: Acquire a voltage value detected by the first voltage detection module and a voltage value detected by the second voltage detection module; Determine whether a charging unit fails based on changes in voltage values ​​detected by the first voltage detection module and changes in voltage values ​​detected by the second voltage detection module; wherein the first voltage detection module is used to detect whether a charging unit fails when a battery pack is inserted into the battery pack plug-in port, and the second voltage detection module is used to detect whether a charging unit fails when a battery pack is not inserted into the battery pack plug-in port.

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