Polarity reverse connection prevention method and system for energy storage battery pack and battery array management unit

Abstract

The invention relates to the technical field of battery management, and discloses an energy storage battery pack polarity reverse connection prevention method, which is applied to a battery array management unit, and comprises the following steps: generating a high-voltage power-on instruction which comprises the number of a battery pack needing to be powered on currently; sending a high-voltage power-on instruction to any sub-battery management unit; and receiving the reverse connection detection result sent by the sub-battery management unit, and determining whether to control the power-off of any sub-battery management unit according to the reverse connection detection result, so that the situation of safety accidents of the energy storage system caused by power-on after reverse connection of the battery pack in the energy storage system can be avoided, and the safety of battery pack management is improved.

Description

Technical Field

[0001] This invention relates to the field of battery management technology, specifically to a method, system, and battery array management unit for preventing reverse polarity connection of an energy storage battery pack. Background Technology

[0002] Currently, before integrated installation, the polarity of energy storage battery packs is marked using different colors to distinguish between positive and negative terminals. Then, construction workers connect each battery pack to the positive and negative bus lines. Reversing the polarity of energy storage battery packs is an error that must be absolutely avoided. The consequences can range from rendering equipment worth thousands or even tens of thousands of yuan unusable to causing serious fires and personal injury accidents. Verifying polarity must be considered an inviolable safety red line during installation and maintenance. However, due to negligence by construction workers and incorrect marking, reverse polarity can still occur, affecting the safety of energy storage power stations. Summary of the Invention

[0003] In view of this, the present invention provides a method, system and battery array management unit for preventing reverse polarity connection of energy storage battery packs, so as to solve the problem of reverse connection of battery packs during manual wiring, which affects the safety of energy storage power stations.

[0004] In a first aspect, the present invention provides a method for preventing reverse polarity connection of an energy storage battery pack, applied to a battery array management unit, comprising:

[0005] Generate a high-voltage power-on command, which includes the battery pack number that needs to be powered on. Send a high-voltage power-on command to any sub-battery management unit; The sub-battery management unit receives the reverse connection detection result sent by the sub-battery management unit. After receiving the high-voltage power-on command, the sub-battery management unit controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close when the battery pack number to be powered on is its own battery pack number. The sub-battery management unit detects the voltage at the back end of the first and second relays, calculates the difference between the voltage at the back end of the first and second relays, and determines whether the battery pack it manages is reverse connected based on the difference between the voltage at the back end. Confirm whether to power down any sub-battery management unit based on the reverse connection test results.

[0006] In one optional implementation, determining whether to power down any sub-battery management unit based on the reverse connection detection result includes: If the reverse connection detection result indicates that the battery pack is reverse connected, a high-voltage power-down command is sent to any sub-battery management unit to control the power-down of any sub-battery management unit; If the reverse connection detection result shows that the battery pack does not have a reverse connection, then continue to send the next high-voltage power-on command to any sub-battery management unit to control the next battery pack to power on.

[0007] In one alternative implementation, generating a high-voltage power-on command includes: Obtain battery pack voltage information sent by the sub-battery management unit. The battery pack voltage information includes the battery pack number and the corresponding battery voltage value. The battery pack number corresponding to the lowest battery voltage value is used as the battery pack number that needs to be powered on. A high-voltage power-on command is generated based on the number of the battery pack that needs to be powered on.

[0008] In a second aspect, the present invention provides a method for preventing reverse polarity connection of an energy storage battery pack, applied to a sub-battery management unit, comprising: Upon receiving a high-voltage power-on command from the battery array management unit, if its own battery pack number is the same as the number of the battery pack currently to be powered, it responds to the high-voltage power-on command and controls the first and second relays connected to the positive and negative terminals of the battery packs it manages to close to power on the battery packs it manages when the number of the battery pack currently to be powered is its own battery pack number. The system detects the voltage at the back end of the first and second relays, calculates the difference between the voltages at the back end of the first and second relays, and determines whether the battery pack it manages is reverse-connected based on the difference in the back end voltage, thus obtaining the reverse connection detection result. The system controls whether to power down the battery pack it manages based on the reverse connection detection results. The reverse connection detection result is sent to the battery array management unit.

[0009] In one optional implementation, determining whether the battery pack under its management is reverse-connected based on the voltage difference at the back end includes: If the voltage difference at the back end is positive, the battery pack managed by the device is not reverse-connected; if the voltage difference at the back end is negative, the battery pack managed by the device is reverse-connected.

[0010] In one optional implementation, after sending the reverse connection detection result to the battery array management unit, the following steps are included: It continuously monitors the commands sent by the battery array management unit. If the received command is a high-voltage power-down command, it controls the battery pack under its management to power down.

[0011] Thirdly, the present invention provides a reverse polarity protection system for an energy storage battery pack, comprising a battery array management unit and a plurality of sub-battery management units connected to the battery array management unit. Each sub-battery management unit is connected to a corresponding battery pack. The positive and negative terminals of any battery pack are connected to the positive and negative terminals of the power supply bus through a first relay and a second relay, respectively. Each sub-battery management unit is connected to the control terminal of the first relay and the control terminal of the second relay, respectively. The battery array management unit is used to execute the reverse polarity protection method for an energy storage battery pack as described in any of the first aspects of the present invention, and the sub-battery management units are used to execute the reverse polarity protection method for an energy storage battery pack as described in any of the second aspects of the present invention.

[0012] Fourthly, the present invention provides a battery array management unit, comprising: The power-on command generation module is used to generate a high-voltage power-on command, which includes the battery pack number that needs to be powered on. The power-on command sending module is used to send high-voltage power-on commands to any sub-battery management unit; The detection result receiving module is used to receive the reverse connection detection result sent by the sub-battery management unit. The reverse connection detection result is obtained after the sub-battery management unit receives the high voltage power-on command. When the number of the battery pack to be powered on is its own battery pack number, the module controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close to power on the battery pack it manages. The module detects the voltage at the back end of the first and second relays, calculates the difference between the voltage at the back end of the first and second relays, and determines whether the battery pack it manages is reverse connected based on the difference between the voltage at the back end. The power-down control module is used to determine whether to power down any sub-battery management unit based on the reverse connection detection result.

[0013] Fifthly, the present invention provides a sub-battery management unit, comprising: The power-on command response module is used to receive the high-voltage power-on command sent by the battery array management unit. If its own battery pack number is the same as the number of the battery pack that needs to be powered on, it responds to the high-voltage power-on command. When the number of the battery pack that needs to be powered on is its own battery pack number, it controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close to power on the battery pack it manages. The reverse connection detection module is used to detect the voltage at the back end of the first and second relays, calculate the difference between the voltage at the back end of the first and second relays, determine whether the battery pack it manages is reversed based on the difference in the back end voltage, and obtain the reverse connection detection result. The power-down control module is used to control whether to power down the battery pack it manages based on the reverse connection detection result; The test result sending module is used to send the reverse connection test results to the battery array management unit.

[0014] Sixthly, the present invention provides an electronic device, comprising: The memory and processor are interconnected and communicate with each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the reverse polarity protection method of the energy storage battery pack in either the first or second aspect.

[0015] The present invention has the following beneficial effects: The present invention provides a method for preventing reverse polarity connection of energy storage battery packs. This method involves sending a high-voltage power-on command to a sub-battery management unit. After the sub-battery management unit powers on the battery pack, it detects the voltage at the back-end of the first and second relays, calculates the voltage difference between the back-end of the first and second relays, and determines whether the battery pack under its management is reverse-connected based on this voltage difference. This identifies the reverse connection status of the currently powered-on battery pack and, based on the reverse connection detection result, determines whether to power down any sub-battery management unit. This method prevents safety accidents in the energy storage system caused by reverse-connected battery packs being powered on, thus improving the safety of battery pack management. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic flowchart of a method for preventing reverse polarity connection of an energy storage battery pack according to an embodiment of the present invention; Figure 2 This is a schematic flowchart of another method for preventing reverse polarity connection of an energy storage battery pack according to an embodiment of the present invention; Figure 3 This is a flowchart illustrating another method for preventing reverse polarity connection of an energy storage battery pack according to an embodiment of the present invention. Figure 4 This is a structural block diagram of a reverse polarity protection system for an energy storage battery pack according to an embodiment of the present invention; Figure 5 This is a structural block diagram of a battery array management unit according to an embodiment of the present invention; Figure 6 This is a structural block diagram of the sub-battery management unit according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Reverse polarity connection of energy storage battery packs poses a significant hazard, primarily including: instantaneous catastrophic damage (short circuits and arcing); direct damage to the battery pack itself; and devastating impact on the Battery Management System (BMS). To prevent reverse polarity connection of energy storage battery packs, this invention proposes a method for preventing such connections. During the high-voltage process, the polarity of each battery cluster is detected and judged in advance. If a cluster with reverse polarity is detected, high voltage is prohibited for the entire battery pack, thus preventing safety accidents.

[0022] The reverse polarity protection method for energy storage battery packs according to embodiments of the present invention is applied to energy storage battery pack reverse polarity protection systems, such as... Figure 1 As shown, the system includes a Battery Array Unit (BAU) and several Slave Battery Management Units (SBMUs) connected to the Battery Array Unit. Each Slave Battery Management Unit is connected to a corresponding battery pack BT1. The positive and negative terminals of any battery pack BT1 are connected to the positive and negative terminals of the power supply bus through a first relay S1 and a second relay S2, respectively. The Slave Battery Management Units are connected to the control terminals of the first relay S1 and the second relay S2, respectively.

[0023] The battery array management unit is the core control unit of the energy storage system. Through global data aggregation, intelligent decision-making and cross-system collaboration, it monitors and manages each battery cluster by summarizing information from each sub-battery management unit and issuing relevant instructions.

[0024] The sub-battery management unit includes four pins: HVB+, HVB-, HVP+, and HVP-. The HVB+ and HVB- pins are connected to the positive and negative terminals of the corresponding battery pack, respectively, to acquire the battery terminal voltage. This allows monitoring of the battery pack's true voltage, which is fundamental for calculating the battery's state of charge, determining overcharge / over-discharge status, and ensuring battery safety. The HVP+ and HVP- pins are connected to the back ends of the first and second relays, respectively, to acquire the voltage at the relay's back end. Normal data acquisition is possible when the first and second relays of any battery pack are closed. Their main function is to perform safety checks before powering on the battery pack, including: confirming that the entire high-voltage circuit from the battery to the load is connected correctly and without breaks; and confirming that the relays can engage normally and have good contact.

[0025] The battery array management unit is used to execute the reverse polarity protection method for the energy storage battery pack as described in any of the first aspects of the present invention, and the sub-battery management unit is used to execute the reverse polarity protection method for the energy storage battery pack as described in any of the second aspects of the present invention.

[0026] According to an embodiment of the present invention, a method for preventing reverse polarity connection of an energy storage battery pack is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] This embodiment provides a method for preventing reverse polarity connection of an energy storage battery pack, which can be executed by the aforementioned battery array management unit. Figure 2 This is a flowchart of a method for preventing reverse polarity connection of an energy storage battery pack according to an embodiment of the present invention, as follows: Figure 2 As shown, the process includes the following steps: Step S201: Generate a high-voltage power-on command, wherein the high-voltage power-on command includes the battery pack number that needs to be powered on.

[0028] The high-voltage power-on command is a command sent by the battery array management unit to the sub-battery management unit to trigger the battery pack to connect to the high-voltage bus. The target power-on object is specified by the number of the battery pack that needs to be powered on.

[0029] After the current battery pack that needs to be powered on is powered on, the battery array management unit sends the number of the next battery pack that needs to be powered on and powers on the next battery pack, thus completing the power-on of all battery packs.

[0030] Step S202: Send a high-voltage power-on command to any sub-battery management unit.

[0031] There are multiple sub-battery management units, each responsible for acquiring the status of a single battery pack, controlling relays, detecting reverse connections, receiving and executing commands from the battery array management unit. Each sub-battery management unit communicates with the battery array management unit via a communication bus to achieve data exchange.

[0032] Step S203: Receive the reverse connection detection result sent by the sub-battery management unit. The reverse connection detection result is obtained after the sub-battery management unit receives the high-voltage power-on command. When the battery pack number to be powered on is its own battery pack number, the sub-battery management unit controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close to power on the battery pack it manages. The sub-battery management unit detects the voltage at the back end of the first and second relays, calculates the difference between the voltage at the back end of the first and second relays, and determines whether the battery pack it manages is reverse connected based on the difference between the voltage at the back end.

[0033] Specifically, each sub-battery management unit is pre-assigned a battery pack number. After receiving a high-voltage power-on command, the sub-battery management unit compares the battery pack number that needs to be powered in the high-voltage power-on command with its own. If they are different, the battery pack is not powered on; if they are the same, the sub-battery management unit closes its own first and second relays to power on the battery pack it is monitoring.

[0034] After the battery pack is powered on, the sub-battery management unit performs HVP detection, which involves detecting the voltage at the back ends of the first and second relays through the HVP+ and HVP- pins, respectively. The difference between the voltage at the back ends of the first and second relays is obtained by subtracting the voltage at the back ends of the second relay from the voltage at the back ends of the first relay. If the difference is negative, it indicates that the battery pack is reversed, and a warning is issued and the reverse connection detection result is reported to the battery array management unit. If the difference is positive, it indicates that the battery is not reversed, and the reverse connection detection result is reported to the battery array management unit.

[0035] Step S204: Based on the reverse connection detection result, confirm whether to power down any sub-battery management unit.

[0036] Specifically, if the reverse connection detection result indicates that the battery pack is reverse connected, a high-voltage power-down command is sent to any sub-battery management unit to control the power-down of any sub-battery management unit.

[0037] If the reverse connection detection result shows that there is no reverse connection in the battery pack, then continue to send the next high-voltage power-on command to any sub-battery management unit to control the power-on of the next battery pack, until all battery packs are powered on.

[0038] It should be understood that since the battery packs are powered on sequentially, if a reverse connection is detected when the first battery pack is powered on, then the first battery pack is already powered on, and it is only necessary to power down the first battery pack. If a subsequent battery pack detects a reverse connection, then all powered battery packs need to be powered down to ensure the safety of the battery system.

[0039] The reverse polarity protection method for energy storage battery packs in this embodiment of the invention sends a high-voltage power-on command to the sub-battery management unit. After the sub-battery management unit powers on the battery pack, it detects the voltage at the back end of the first and second relays, calculates the difference between the voltages at the back end of the first and second relays, and determines whether the battery pack under its management is reverse-connected based on the voltage difference. This identifies the reverse connection status of the currently powered-on battery pack, and then determines whether to power down any sub-battery management unit based on the reverse connection detection result. This avoids safety accidents in the energy storage system caused by powering on a battery pack after reverse connection, thus improving the safety of battery pack management.

[0040] In some embodiments, step S201, generating a high-voltage power-on command, includes: Step S201: Obtain the battery pack voltage information sent by the sub-battery management unit. The battery pack voltage information includes the battery pack number and the corresponding battery voltage value.

[0041] Step S202: The battery pack number corresponding to the lowest battery voltage value is used as the battery pack number that needs to be powered on.

[0042] Step S203: Generate a high-voltage power-on command based on the number of the battery pack that needs to be powered on.

[0043] Specifically, the battery array management unit collects the battery voltage values ​​of each battery pack uploaded by each sub-battery management unit. After sorting the voltage values ​​uploaded by all sub-battery management units, it selects the number of the battery pack with the lowest voltage as the priority to power on. According to the principle of prioritizing charging the cluster with the lowest voltage, the number of the battery pack that is powered on first is issued first.

[0044] By adopting the principle of "prioritizing charging lower voltage clusters", charging efficiency is improved by prioritizing charging lower voltage battery packs.

[0045] This embodiment provides a method for preventing reverse polarity connection of an energy storage battery pack, which can be executed by the aforementioned sub-battery management unit. Figure 3 This is a flowchart of a method for preventing reverse polarity connection of an energy storage battery pack according to an embodiment of the present invention, as follows: Figure 3 As shown, the process includes: Step S301: Receive the high-voltage power-on command sent by the battery array management unit. If the number of its own battery pack is the same as the number of the battery pack that needs to be powered on, then respond to the high-voltage power-on command. When the number of the battery pack that needs to be powered on is its own battery pack number, control the first and second relays connected to the positive and negative terminals of the battery pack managed by itself to close to power on the battery pack managed by itself.

[0046] Specifically, after receiving the high-voltage power-on command, the sub-battery management unit compares the battery pack number that needs to be powered in the high-voltage power-on command with its own. If they are different, it does not power on; if they are the same, it closes the first and second relays it controls, thus powering on the battery pack it monitors.

[0047] Step S302: Detect the back-end voltages of the first and second relays, calculate the difference between the back-end voltages of the first and second relays, determine whether the battery pack under its management is reverse-connected based on the difference in back-end voltages, and obtain the reverse connection detection result.

[0048] After the battery pack is powered on, the sub-battery management unit performs HVP detection, which involves detecting the voltage at the back end of the first and second relays through the HVP+ and HVP- pins, respectively. The difference between the voltage at the back end of the first relay and the voltage at the back end of the second relay is obtained. If the difference is positive, the battery pack managed by the sub-battery management unit is not reversed; if the difference is negative, the battery pack managed by the sub-battery management unit is reversed.

[0049] Step S303: Control whether to power down the battery pack managed by itself based on the reverse connection detection result.

[0050] Specifically, if the reverse connection detection result indicates a reverse connection, the system will power down the battery pack it manages and issue a warning; otherwise, it will maintain normal power-on status.

[0051] Step S304: Send the reverse connection detection result to the battery array management unit.

[0052] The reverse connection detection result is sent to the battery array management unit. After receiving the reverse connection detection result, the battery array management unit analyzes it. If the reverse connection detection result indicates that the battery pack is reverse connected, it sends a high-voltage power-down command to any sub-battery management unit to control the power-down of any sub-battery management unit. If the reverse connection detection result indicates that the battery pack is not reverse connected, it continues to send the next high-voltage power-on command to any sub-battery management unit to control the power-on of the next battery pack, until all battery packs are powered on.

[0053] It should be understood that since the battery packs are powered on sequentially, if a reverse connection is detected when the first battery pack is powered on, then the first battery pack is already powered on, and it is only necessary to power down the first battery pack. If a subsequent battery pack detects a reverse connection, then all powered battery packs need to be powered down to ensure the safety of the battery system.

[0054] The reverse polarity protection method for energy storage battery packs in this embodiment of the invention sends a high-voltage power-on command to the sub-battery management unit. After the sub-battery management unit powers on the battery pack, it detects the voltage at the back end of the first and second relays, calculates the difference between the voltages at the back end of the first and second relays, and determines whether the battery pack under its management is reverse-connected based on the voltage difference. This identifies the reverse connection status of the currently powered-on battery pack, and then determines whether to power down any sub-battery management unit based on the reverse connection detection result. This avoids safety accidents in the energy storage system caused by powering on a battery pack after reverse connection, thus improving the safety of battery pack management.

[0055] Further, in step S304, after sending the reverse connection detection result to the battery array management unit, the following steps are included: Step S305: Continuously monitor the instructions sent by the battery array management unit. If the received instruction is a high-voltage power-down instruction, control the battery pack under its management to power down.

[0056] Specifically, after the sub-battery management unit uploads the reverse connection detection result to the battery array management unit, it does not interrupt the communication with the battery array management unit and continues to listen for the instructions sent by the battery array management unit.

[0057] If the sub-battery management unit receives a high-voltage power-down command from the battery array management unit due to reverse connection of other battery packs, it immediately executes the power-down operation, controls the first and second relays to disconnect, and cuts off the connection between the battery pack and the power supply bus. If no power-down command is received and its own detection result shows no reverse connection, it remains powered on.

[0058] After the sub-battery management unit reports the test results, it continuously listens for instructions from the battery array management unit to ensure timely response to high-voltage power-down instructions issued by the battery array management unit when other clusters are reverse-connected, thereby improving system safety.

[0059] like Figure 1 As shown, this embodiment of the invention also provides a reverse polarity protection system for an energy storage battery pack, including a battery array management unit and a plurality of sub-battery management units connected to the battery array management unit. Each sub-battery management unit is connected to a corresponding battery pack. The positive and negative terminals of any battery pack are connected to the positive and negative terminals of the power supply bus through a first relay and a second relay, respectively. The sub-battery management units are connected to the control terminals of the first relay and the second relay, respectively.

[0060] like Figure 4 As shown, the working process of the reverse polarity protection system for energy storage battery packs is as follows: 1: The battery array management unit sends a high-voltage power-on command HV_ON to each sub-battery management unit. According to the principle of charging the cluster with the lower voltage first, the battery array management unit will first send the battery pack number that is powered on first. 2. After receiving the high-voltage power-on command HV_ON, each sub-battery management unit compares the battery pack number in the command with its own. If they are different, power is not applied; if they are the same, the first and second relays are closed to apply power.

[0061] 3: The first sub-battery management unit to be powered on will prioritize HVP detection after the corresponding battery pack is powered on.

[0062] 3.1: If the difference between the back-end voltages of the first and second relays is detected to be negative, an alarm is issued and reported to the battery array management unit, and the sub-battery management unit is powered down automatically.

[0063] 3.2: After receiving the information, the battery array management unit also reports a fault, and at the same time prohibits other sub-battery management units from powering on and controls the powered-on sub-battery management units to power off, resulting in failure to apply high voltage.

[0064] 4: If the difference in voltage at the relay's back end is detected as negative or positive, it indicates that the battery pack under the monitoring of the first high-voltage sub-battery management unit has not been reverse-connected.

[0065] 5: Control the remaining sub-battery management units to power on sequentially, and perform HVP detection on the remaining sub-battery management units.

[0066] 5.1: If a negative difference in voltage is detected at the relay's back end, an alarm is issued, the sub-battery management unit that has not yet been powered on remains in the power-off state (HV_OFF), and the alarm is reported to the battery array management unit. 5.2: The battery array management unit issues a power-off command to the sub-battery management unit that has already been powered on.

[0067] 5.3: The sub-battery management unit that has been powered on fails to power down and connect to high voltage.

[0068] 6: If the voltage difference detected at the relay's back end is positive, it means that the remaining battery packs under the monitoring of the sub-battery management unit have not been reverse-connected.

[0069] 7: The remaining sub-battery management units are powered on in sequence, and the power-on is successful.

[0070] This embodiment also provides a battery array management unit, such as Figure 5 As shown, it includes: The power-on command generation module 501 is used to generate a high-voltage power-on command, wherein the high-voltage power-on command includes the number of the battery pack that needs to be powered on. The power-on command sending module 502 is used to send a high-voltage power-on command to any sub-battery management unit; The detection result receiving module 503 is used to receive the reverse connection detection result sent by the sub-battery management unit. The reverse connection detection result is obtained after the sub-battery management unit receives the high voltage power-on command. When the number of the battery pack to be powered on is its own battery pack number, the sub-battery management unit controls the first relay and the second relay connected to the positive and negative terminals of the battery pack it manages to close to power on the battery pack it manages. The sub-battery management unit detects the voltage at the back end of the first relay and the second relay, calculates the difference between the voltage at the back end of the first relay and the second relay, and determines whether the battery pack it manages is reverse connected based on the difference between the voltage at the back end. The power-down control module 504 is used to determine whether to control the power-down of any sub-battery management unit based on the reverse connection detection result.

[0071] This embodiment also provides a sub-battery management unit, such as Figure 6 As shown, it includes: The power-on command response module 601 is used to receive the high-voltage power-on command sent by the battery array management unit. If its own battery pack number is the same as the number of the battery pack that needs to be powered on, it responds to the high-voltage power-on command. When the number of the battery pack that needs to be powered on is its own battery pack number, it controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close to power on the battery pack it manages. The reverse connection detection module 602 is used to detect the back-end voltage of the first relay and the second relay, calculate the difference between the back-end voltages of the first relay and the second relay, determine whether the battery pack it manages is reverse connected based on the difference in the back-end voltage, and obtain the reverse connection detection result. The power-down control module 603 is used to control whether to power down the battery pack it manages based on the reverse connection detection result; The detection result sending module 604 is used to send the reverse connection detection result to the battery array management unit.

[0072] This invention also provides an electronic device, please refer to [link / reference]. Figure 7 , Figure 7 This is a schematic diagram of the structure of an electronic device provided in an optional embodiment of the present invention, such as... Figure 7As shown, the electronic device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple electronic devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 7 Take a processor 10 as an example.

[0073] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0074] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0075] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the electronic device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0076] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0077] The electronic device also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 20 can be connected via a bus or other means. Figure 7 Taking the example of a connection between China and Israel via a bus.

[0078] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the electronic device, such as a touch screen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touch screen.

[0079] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0080] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0081] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for preventing reverse connection of energy storage battery pack polarity, applied to a battery array management unit, characterized in that, include: Generate a high-voltage power-on command, wherein the high-voltage power-on command includes the battery pack number that needs to be powered on; Send a high-voltage power-on command to any sub-battery management unit; The sub-battery management unit receives the reverse connection detection result sent by the sub-battery management unit. The reverse connection detection result is obtained after the sub-battery management unit receives the high voltage power-on command. When the battery pack number to be powered on is its own battery pack number, the sub-battery management unit controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close to power on the battery pack it manages. The sub-battery management unit detects the voltage at the back end of the first and second relays, calculates the difference between the voltage at the back end of the first and second relays, and determines whether the battery pack it manages is reverse connected based on the difference between the voltage at the back end. Based on the reverse connection detection results, determine whether to power down any sub-battery management unit.

2. The method of claim 1, wherein, Confirming whether to power down any sub-battery management unit based on the reverse connection detection result includes: If the reverse connection detection result indicates that the battery pack is reverse connected, a high-voltage power-down command is sent to any sub-battery management unit to control the power-down of any sub-battery management unit; If the reverse connection detection result indicates that the battery pack does not have a reverse connection, then the next high-voltage power-on command will be sent to any sub-battery management unit to control the next battery pack to be powered on.

3. The method according to claim 1, characterized in that, Generate a high-voltage power-on command, including: Obtain battery pack voltage information sent by the sub-battery management unit, wherein the battery pack voltage information includes the battery pack number and the corresponding battery voltage value; The battery pack number corresponding to the lowest battery voltage value is used as the battery pack number that needs to be powered on. A high-voltage power-on command is generated based on the number of the battery pack that needs to be powered on.

4. A method for preventing reverse polarity connection of an energy storage battery pack, applied to a sub-battery management unit, characterized in that, include: If the battery pack number of the device receives a high-voltage power-on command from the battery array management unit and is the same as the number of the battery pack that needs to be powered on, then the device responds to the high-voltage power-on command and controls the first and second relays connected to the positive and negative terminals of the battery packs it manages to close when the number of the battery pack that needs to be powered on is its own battery pack number, so as to power on the battery packs it manages. The system detects the voltage at the back end of the first and second relays, calculates the difference between the voltages at the back end of the first and second relays, and determines whether the battery pack it manages is reverse-connected based on the difference in the back end voltage, thus obtaining the reverse connection detection result. The system controls whether to power down the battery pack it manages based on the reverse connection detection result. The reverse connection detection result is sent to the battery array management unit.

5. The method according to claim 4, characterized in that, Determine whether the battery packs under its management are reverse-connected based on the voltage difference at the back end, including: If the voltage difference at the back end is positive, the battery pack managed by the device is not reverse-connected; if the voltage difference at the back end is negative, the battery pack managed by the device is reverse-connected.

6. The method according to claim 4, characterized in that, After sending the reverse connection detection result to the battery array management unit, the process includes: It continuously monitors the commands sent by the battery array management unit. If the received command is a high-voltage power-down command, it controls the battery packs it manages to power down.

7. A reverse polarity protection system for an energy storage battery pack, characterized in that, The device includes a battery array management unit and several sub-battery management units connected to the battery array management unit. Each sub-battery management unit is connected to a corresponding battery pack. The positive and negative terminals of any battery pack are connected to the positive and negative terminals of the power supply bus via a first relay and a second relay, respectively. Each sub-battery management unit is connected to the control terminal of the first relay and the control terminal of the second relay, respectively. The battery array management unit is used to execute the reverse polarity protection method for the energy storage battery pack as described in any one of claims 1 to 3, and the sub-battery management units are used to execute the reverse polarity protection method for the energy storage battery pack as described in any one of claims 4 to 6.

8. A battery array management unit, characterized in that, include: A power-on command generation module is used to generate a high-voltage power-on command, wherein the high-voltage power-on command includes the battery pack number that needs to be powered on. The power-on command sending module is used to send high-voltage power-on commands to any sub-battery management unit; The detection result receiving module is used to receive the reverse connection detection result sent by the sub-battery management unit. The reverse connection detection result is obtained after the sub-battery management unit receives the high voltage power-on command. When the battery pack number to be powered on is its own battery pack number, the sub-battery management unit controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close to power on the battery pack it manages. The module detects the voltage at the back end of the first and second relays, calculates the difference between the voltage at the back end of the first and second relays, and determines whether the battery pack it manages is reverse connected based on the difference between the voltage at the back end. The power-down control module is used to determine whether to control any sub-battery management unit to power down based on the reverse connection detection result.

9. A sub-battery management unit, characterized in that, include: The power-on command response module is used to receive the high-voltage power-on command sent by the battery array management unit. If its own battery pack number is the same as the number of the battery pack that needs to be powered on, it responds to the high-voltage power-on command and controls the first and second relays connected to the positive and negative terminals of the battery pack it manages to close when the number of the battery pack that needs to be powered on is its own battery pack number, so as to power on the battery pack it manages. The reverse connection detection module is used to detect the voltage at the back end of the first and second relays, calculate the difference between the voltage at the back end of the first and second relays, determine whether the battery pack it manages is reversed based on the difference in the back end voltage, and obtain the reverse connection detection result. The power-down control module is used to control whether to power down the battery pack it manages based on the reverse connection detection result; The detection result sending module is used to send the reverse connection detection result to the battery array management unit.

10. An electronic device, characterized in that, include: A memory and a processor are interconnected, the memory stores computer instructions, and the processor executes the computer instructions to perform the reverse polarity protection method for the energy storage battery pack as described in any one of claims 1 to 6.

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