Power battery pack switching method, system and equipment and computer readable storage medium

Abstract

The invention provides a power battery pack switching method, system and device and a computer readable storage medium, and the system comprises an execution controller which is used for analyzing an execution signal sent by a system controller and sending an action control signal to a corresponding action mechanism; the action mechanism is connected with the execution controller and is used for controlling the closing or opening of the corresponding power battery pack; the detection mechanism is connected with the action mechanism and used for detecting whether the action mechanism executes in place or not; according to the invention, the safety can be improved, the service life of the battery is prolonged, the normal operation of equipment is ensured, the efficiency is improved, the reliability is enhanced, the switching delay can be controlled at a microsecond level, and the switching efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of battery switching technology, and in particular to a power battery pack switching method, system, device and computer-readable storage medium. Background Art

[0002] In recent years, electrical equipment has been widely used in all walks of life. Battery packs, as energy carriers of electrical equipment, are key components that affect the performance of electrical equipment. Conventional battery packs are a combination of individual batteries. Due to the limitations of the battery's own material properties, the current battery pack voltage is not very high. Based on the demand for improving the battery life of electrical equipment, it is expected to develop battery packs of different capacities to meet different battery life requirements. However, the development and production cycles of battery packs of different capacities are long and the cost is high. In order to save costs and shorten the development and production cycles, the industry uses a parallel solution of multiple battery packs to expand the battery pack capacity to increase the battery life. The multiple battery packs are all connected to the electrical equipment, and switches are set on the connection path. In actual work, the switches of the battery packs that supply power to the electrical equipment are turned on, and the other switches are turned off.

[0003] In the parallel scheme of battery packs, only one battery pack can output power to the electrical equipment at the same time. When the battery pack currently supplying power is insufficient, it is necessary to switch to other battery packs to supply power to the electrical equipment. Currently, parallel battery packs are usually switched through battery switching devices, or by controlling the charge and discharge switches of the battery management system (BMS), or directly through simple switching circuits. However, the electrical equipment has no way of sensing the above switching process. If an abnormality occurs during the switching process, it may cause abnormal power supply to the electrical equipment, triggering a power outage in the electrical equipment, causing the electrical equipment to fail to work normally, and thus causing a safety accident.

[0004] In order to solve the above technical problems, a technical solution is disclosed in a switching control method and device for a battery pack with application number: 202211148221.4. During the process of the first battery pack supplying power to the power-consuming equipment, the control device obtains the first remaining power of the first battery pack; if the first remaining power of the first battery pack is less than the first threshold, the control device sends a switching request to the power-consuming equipment, so that the power-consuming equipment is in a safe state supporting switching; the control device obtains the remaining power of the battery pack other than the first battery pack among multiple battery packs; the control device switches the second battery pack to supply power to the power-consuming equipment, and the second battery pack is a battery pack other than the first battery pack among multiple battery packs, with a remaining power greater than the first threshold; this application avoids the situation where, when multiple battery packs supply power to the power-consuming equipment, an abnormality occurs during the switching process, resulting in abnormal power supply to the power-consuming equipment, so that the power-consuming equipment cannot work normally, thereby causing a safety accident.

[0005] The principle of improving safety in this application is based on switching when the electrical equipment is in a safe state that supports switching. However, the safety of the switching process cannot be guaranteed. For example, problems such as current shock caused by inadequate switching action may lead to safety risks such as electrical failure and fire.

[0006] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the Invention

[0007] In view of this, the present invention provides a power battery pack switching method, comprising the following steps: S1: Detect the voltage of the current power battery pack. When the voltage of the current power battery pack is lower than the minimum power supply voltage threshold, a low voltage alarm signal is sent to the input device. S2: The input device sends a battery pack switching signal to the system controller; S3: The system controller sends an execution signal to the execution controller of the current power battery pack; S4: The execution controller of the current power battery pack analyzes the execution signal of S3 and sends an action control signal to the action mechanism of the current power battery pack; S5: The action mechanism of the current power battery pack performs an action according to the action control signal of S4; S6: The detection mechanism of the current power battery pack sends a signal that the action mechanism has reached its action position to the execution controller of the current power battery pack; S7: The execution controller of the current power battery pack stops sending the action control signal to the action mechanism of the current power battery pack; S8: The system controller sends an execution signal to the execution controller of the power battery pack to be switched; S9: The execution controller of the power battery pack to be switched sends a circuit closing signal to the action mechanism of the power battery pack to be switched, closing the circuit of the power battery pack to be switched.

[0008] As a preferred solution, the action control signal in S4 includes an action vector signal, an action direction signal, and an action pulse signal; wherein, the action vector signal is used to activate the action mechanism of the current power battery pack, the action direction signal is used to determine the action direction of the current power battery pack, and the action pulse signal is used to determine the action distance of the current power battery pack.

[0009] As a preferred solution, S5 specifically refers to the action mechanism of the current battery pack receiving the action control signal, and the action mechanism starts to move from the first position and stops when it reaches the second position; wherein, the first position is the starting position during the action, and the second position is the next position adjacent to the starting position.

[0010] As a preferred solution, S6 is specifically as follows: the detection mechanism of the current power battery pack detects whether the action mechanism of the current power battery pack has reached its limit, and if so, sends an action mechanism action limit signal to the execution controller of the current power battery pack, and then executes S7, otherwise executes S4.

[0011] As a preferred solution, S81 is included between S8 and S9 to detect whether the voltage of the power battery pack to be switched is higher than the minimum power supply voltage threshold. If so, the execution controller of the power battery pack to be switched turns on the action mechanism control power supply and executes S9; otherwise, a low voltage alarm signal is sent to the input device.

[0012] The present invention provides a power battery pack switching system, comprising: The execution controller is used to analyze the execution signal sent by the system controller and send an action control signal to the corresponding action mechanism; Action mechanism: connected to the execution controller, used to control the closing or opening of the corresponding battery pack; Detection mechanism: connected to the action mechanism, used to detect whether the action mechanism is executed in place.

[0013] As a preferred solution, the execution controller includes: A signal transmission unit, configured to receive an execution signal sent by the system controller to the execution controller; The signal analysis unit is connected to the signal transmission unit, analyzes the execution signal, and sends an action control signal to the corresponding action mechanism; An action execution unit, connected to the signal analysis unit, for controlling the action mechanism to execute a corresponding action based on the action control signal; A signal cutoff unit, connected to the detection mechanism, is used to stop sending an action control signal to the action mechanism of the power battery pack whose voltage is below the minimum threshold; The closing execution unit is used to control the action mechanism of the power battery pack to be switched to send a circuit closing signal to close the power battery pack circuit.

[0014] As a preferred solution, the action mechanism includes a switch, the input end of the switch is connected to the fuse, and the output end of the switch is connected to the resistor R1.

[0015] The present invention also provides an electronic device, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the above-mentioned power battery pack switching method.

[0016] The present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the power battery pack switching method are implemented.

[0017] This application has the following advantages: 1. Improve safety: Ensure that the battery switching mechanism is accurately positioned to avoid problems such as current shock caused by inadequate mechanism, thereby reducing safety risks such as electrical failure and fire; 2. Extend battery life: Correct switching actions can reduce battery wear and damage and extend battery life.

[0018] 3. Ensure the normal operation of the equipment: timely discovering and solving the problem of inadequate switching mechanism can avoid equipment failure and production interruption caused by battery power interruption or instability.

[0019] 4. Improve efficiency: The presence of testing agencies can help identify problems and make adjustments in a timely manner, reducing unnecessary downtime and maintenance costs, and improving production efficiency.

[0020] 5. Enhanced reliability: By ensuring the accuracy and reliability of switching actions, the reliability and stability of the entire battery system are improved; 6. The switching delay of this application can be controlled at the microsecond level, greatly improving the switching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a logic diagram of the power battery pack switching method of this application; Figure 2 A schematic diagram of the power battery pack switching system of the present application; [Description of Reference Numerals] Among them, 1-power battery pack 1, 2-power battery pack 2, 3-execution controller 1, 4-action mechanism 1, 5-electrical equipment, 6-execution controller 2, 7-action mechanism 2, 8-switch, 9-fuse, 10-photoelectric isolation circuit, 11-drive protection circuit, 12-voltage detection sensor, 13-current detection sensor. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0025] Example 1: This embodiment provides a power battery pack switching method, comprising the following steps: The number of power battery packs in this application can be multiple groups, and the specific number is not limited. It can be selected according to the specific situation. This embodiment takes two groups as an example, where power battery pack 1 is the current power battery pack below the minimum supply voltage threshold, and power battery pack 2 is the power battery pack to be switched. Each group of power batteries is equipped with a group of semiconductor switching circuits.

[0026] S1: Detect the voltage of the current power battery pack. When the voltage of the current power battery pack is lower than the minimum power supply voltage threshold, a low voltage alarm signal is sent to the input device. S2: The input device sends a battery pack switching signal to the system controller; S3: The system controller sends an execution signal to the execution controller 3 of the power battery pack 1; S4: The execution controller 3 analyzes the execution signal of S3 and sends an action control signal to the action mechanism 4 of the current power battery pack 1; the action control signal includes an action vector signal, an action direction signal, and an action pulse signal; wherein the action vector signal is used to activate the action mechanism 4, the action direction signal is used to determine the action direction of the current power battery pack 1, and the action pulse signal is used to determine the action distance of the current power battery pack 1; S5: The action mechanism 4 executes an action according to the action control signal of S4, turning off the switch of the power battery pack 1, disconnecting it from the power supply circuit, and stopping power supply to the electrical device 5. More specifically, the action mechanism 4 of the power battery pack 1 currently receives the action control signal, and the action mechanism 4 starts to operate from the first position and stops when it reaches the second position. The first position is the starting position of the action, and the second position is the next position adjacent to the starting position, that is, the switch of the power battery pack 1 is disconnected. S6: The detection mechanism 1 of the current power battery pack 1 detects whether the actuation mechanism 4 is in position. When the actuation mechanism 4 is in position, the detection mechanism 1 sends a signal indicating that the actuation mechanism 4 is in position to the execution controller 3 of the current power battery pack 1. If the actuation mechanism 4 is not in position, S4 is executed. S7: The execution controller 3 of the current power battery pack 1 stops sending the action control signal to the action mechanism 4; the action control signal includes an action vector signal, an action direction signal, and an action pulse signal; S8: The system controller sends an execution signal to the execution controller 2 6 of the power battery pack 2 to be switched; S9: The execution controller 26 of the power battery pack 22 to be switched sends a circuit closing signal to the action mechanism 27 of the power battery pack 22 to be switched, closes the circuit of the power battery pack 22 to be switched, connects the power battery pack 22 to the power supply circuit, and supplies power to the electrical equipment 5; preferably, before executing S9, the detection mechanism 2 detects whether the voltage of the power battery pack 22 to be switched is higher than the minimum power supply voltage threshold. If so, the execution controller 26 of the power battery pack 22 connects the control power of the action mechanism 27 and executes S9; otherwise, a low voltage alarm signal is sent to the input device.

[0027] In this embodiment, when switching power battery packs, the power battery pack 1 below the minimum supply voltage threshold is first shut down, and then the power battery pack 2 required is switched to. During the switching process, the detection mechanism 1 detects whether the action mechanism 1 4 is fully executed, which can achieve the following technical effects: 1. Prevent current shock: Because the output current and voltage of the low-voltage power battery pack are unstable when it is working, if you directly switch to another power battery pack while it is still in working state, it may cause a momentary current shock, which may damage the electronic components in the circuit and affect the normal operation of the equipment; 2. Maintain voltage stability: The voltages of different power battery packs may vary. Turning off the low-voltage power battery pack 1 first can prevent the low-voltage power battery pack from affecting the overall circuit voltage, thereby enabling a more stable supply of the required voltage when switching to the new power battery pack 2. 3. Protect battery life: Directly switching when the power battery pack is in working state will damage the low-voltage power battery pack in use and shorten its service life; turning off the low-voltage power battery pack first can allow it to have a proper "rest" and recovery process.

[0028] 4. Improve system reliability: It helps ensure the reliability and stability of the entire power system and reduce the probability of failure.

[0029] Example 2: This embodiment provides a power battery pack switching system, including: The execution controller is used to analyze the execution signal sent by the system controller and send an action control signal to the corresponding action mechanism; in combination with the first embodiment, this embodiment includes two execution controllers, namely, the first execution controller 3 and the second execution controller 6; when three sets of power batteries are used, three execution controllers are equipped, which will not be described in detail here; Action mechanism: connected to the execution controller, used to control the closing or opening of the corresponding power battery pack; combined with the first embodiment, this embodiment includes two action mechanisms, namely action mechanism 1 4 and action mechanism 2 7. The execution controller 1 3 controls the action mechanism 1 4, and the execution controller 2 6 controls the action mechanism 2 7; Preferably, the action mechanism includes a switch 8, the input end of the switch 8 is connected to the fuse 9, and the output end of the switch 8 is connected to the resistor R1; wherein, the switch 8 adopts a semiconductor switch, such as a MOS tube or an IGBT, etc. The semiconductor switch has the advantages of high-speed switching characteristics, load switching without arcing characteristics, and strong adaptability to dust and smoke environments. The rational use of this characteristic can not only complete the switching function of traditional mechanical contacts, but also complete functions that traditional mechanical contactors do not have when equipped with detection means and protection means; more preferably, a photoelectric isolation circuit 10 and a drive protection circuit 11 are sequentially arranged between the execution controller and the action mechanism. The drive protection circuit 11 is mainly used to complete the opening and closing and protection functions of the semiconductor switch; the use of the semiconductor switch enables the switching delay of the power battery pack to be controlled at the microsecond level, while the switching delay of the mechanical contactor is generally tens to hundreds of milliseconds. The switching delay of the semiconductor switch is much smaller than that of the mechanical contactor, which greatly improves the switching efficiency; Detection mechanism: connected to the action mechanism, used to detect whether the action mechanism is fully executed. The detection mechanism in this embodiment adopts a voltage detection sensor 12 and a current detection sensor 13. The voltage detection sensor 12 is used to detect the voltage at the input end of the switch 8, and the current detection sensor 13 is used to detect the current at the output end of the switch 8. By judging the voltage and current, it can be confirmed whether the action mechanism is fully executed. For example, when the action mechanism is completely closed, the voltage at both ends of the action mechanism should be close to the voltage of the power battery pack, and the current should be almost zero. If obvious current can still be detected, it means that the action mechanism has not been fully closed.

[0030] Each of the above-mentioned sets of execution controllers, action mechanisms, and detection mechanisms is connected to a set of power battery packs. If two sets of execution controllers, action mechanisms, and detection mechanisms are provided, two sets of power battery packs are provided, and so on. No further details are given here.

[0031] More preferably, the execution controller includes: A signal transmission unit, configured to receive an execution signal sent by the system controller to the execution controller; The signal analysis unit is connected to the signal transmission unit, analyzes the execution signal, and sends an action control signal to the corresponding action mechanism; An action execution unit, connected to the signal analysis unit, for controlling the action mechanism to execute a corresponding action based on the action control signal; A signal cutoff unit, connected to the detection mechanism, is used to stop sending an action control signal to the action mechanism of the power battery pack whose voltage is below the minimum threshold; The closing execution unit is used to control the action mechanism of the power battery pack to be switched to send a circuit closing signal to close the power battery pack circuit.

[0032] Example 3: Based on the above embodiment, this embodiment also proposes an electronic device, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the above power battery pack switching method are implemented.

[0033] It should be noted that the above-mentioned device embodiment and method embodiment belong to the same concept, and their specific implementation process is detailed in the method embodiment, and the technical features in the method embodiment are applicable in the system embodiment, which will not be repeated here.

[0034] Example 4: Based on the above embodiment, this embodiment further proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the power battery pack switching method are implemented.

[0035] It should be noted that the above-mentioned device embodiment and method embodiment belong to the same concept, and their specific implementation process is detailed in the method embodiment, and the technical features in the method embodiment are applicable in the system embodiment, which will not be repeated here.

[0036] In summary, due to the adoption of the above technical solution, this application has the following advantages: 1. Improve safety: Ensure that the battery switching mechanism is accurately in place to avoid current shock problems caused by inadequate mechanism, thereby reducing safety risks such as electrical failures and fires; 2. Extend battery life: Correct switching actions can reduce battery wear and damage and extend battery life.

[0037] 3. Ensure the normal operation of the equipment: timely discovering and solving the problem of inadequate switching mechanism can avoid equipment failure and production interruption caused by battery power interruption or instability.

[0038] 4. Improve efficiency: The presence of testing agencies can help identify problems and make adjustments in a timely manner, reducing unnecessary downtime and maintenance costs, and improving production efficiency.

[0039] 5. Enhanced reliability: By ensuring the accuracy and reliability of switching actions, the reliability and stability of the entire battery system are improved; 6. The switching delay of this application can be controlled at the microsecond level, greatly improving the switching efficiency.

[0040] The above are exemplary embodiments disclosed in the present invention. The order in which the above embodiments of the present invention are disclosed is for description only and does not represent the advantages and disadvantages of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples. Various changes and modifications may be made without departing from the scope defined by the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as plural unless expressly limited to the singular.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the disclosure of the present invention (including the claims) to these examples. Within the spirit of the present invention, the technical features of the above embodiments or different embodiments may be combined, and many other variations exist in different aspects of the present invention as described above, which are not provided in detail for the sake of clarity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A power battery pack switching method, characterized in that: The steps include: S1: Detect the voltage of the current power battery pack. When the voltage of the current power battery pack is lower than the minimum power supply voltage threshold, send a low voltage alarm signal to the input device; S2: The input device sends a battery pack switching signal to the system controller; S3: The system controller sends an execution signal to the execution controller of the current power battery pack; S4: The execution controller of the current power battery pack analyzes the execution signal of S3 and sends an action control signal to the action mechanism of the current power battery pack; S5: The action mechanism of the current power battery pack performs an action according to the action control signal of S4; S6: The detection mechanism of the current power battery pack sends a signal that the action mechanism of the current power battery pack has reached its action position to the execution controller of the current power battery pack; S7: The execution controller of the current power battery pack stops sending the action control signal to the action mechanism of the current power battery pack; S8: The system controller sends an execution signal to the execution controller of the power battery pack to be switched; S9: The execution controller of the power battery pack to be switched sends a circuit closing signal to the action mechanism of the power battery pack to be switched, thereby closing the circuit of the power battery pack to be switched.

2. The power battery pack switching method according to claim 1, characterized in that: The action control signal in S4 includes an action vector signal, an action direction signal, and an action pulse signal; wherein the action vector signal is used to activate the action mechanism of the current power battery pack, the action direction signal is used to determine the action direction of the current power battery pack, and the action pulse signal is used to determine the action distance of the current power battery pack.

3. The power battery pack switching method according to claim 1, characterized in that: S6 is specifically as follows: the detection mechanism of the current power battery pack detects whether the action mechanism of the current power battery pack is in full motion, and if so, sends an action mechanism action full motion signal to the execution controller of the current power battery pack, otherwise, executes S4.

4. The power battery pack switching method according to claim 1, characterized in that: S81 is included between S8 and S9 to detect whether the voltage of the power battery pack to be switched is higher than the minimum supply voltage threshold. If so, the execution controller of the power battery pack to be switched turns on the action mechanism control power supply and executes S9; otherwise, a low voltage alarm signal is sent to the input device.

5. A power battery pack switching system for executing the power battery pack switching method according to any one of claims 1 to 4, characterized in that: include: An execution controller is used to analyze the execution signal sent by the system controller and send an action control signal to the corresponding action mechanism; Action mechanism: connected to the execution controller, used to control the closing or opening of the corresponding power battery pack; Detection mechanism: connected with the action mechanism, used to detect whether the action mechanism is executed in place.

6. The power battery pack switching system according to claim 5, characterized in that: The execution controller comprises: A signal transmission unit, used for receiving an execution signal sent by the system controller to the execution controller; The signal analysis unit is connected to the signal transmission unit, analyzes the execution signal, and sends an action control signal to the corresponding action mechanism; An action execution unit, connected to the signal analysis unit, for controlling the action mechanism to execute a corresponding action based on the action control signal; A signal cutoff unit, connected to the detection mechanism, for stopping sending an action control signal to the action mechanism of the power battery pack below the minimum threshold; The closing execution unit is used to control the action mechanism of the power battery pack to be switched to send a circuit closing signal to close the power battery pack circuit.

7. The power battery pack switching system according to claim 5, characterized in that: The action mechanism comprises a switch (8), an input end of the switch (8) is connected to a fuse (9), and an output end of the switch (8) is connected to a resistor R1.

8. The power battery pack switching system according to claim 7, characterized in that: The switch is a semiconductor switch.

9. An electronic device, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the power battery pack switching method described in any one of claims 1 to 4.

10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the power battery pack switching method according to any one of claims 1 to 4.

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