Energy storage battery pack parallel system and parallel method

Abstract

The application discloses a kind of energy storage battery pack parallel system and parallel method.The energy storage battery pack parallel system includes main package, power-on package and connecting component;Multiple power-on packages are sequentially connected by connecting component, and the first power-on package in multiple power-on packages is connected with main package by connecting component;Power-on package is used to provide first enable coding when being connected to parallel system by connecting component, so that power-on package or main package receiving first enable coding sends coding request signal;Main package is used to send coding permission signal based on coding request signal, so that power-on package or main package receiving first enable coding sends second enable coding when obtaining coding permission signal, so that power-on package connected to parallel system completes address coding based on second enable coding and informs main package coding completion.Through the adoption of the above scheme, the problem that the existing energy storage battery pack needs to increase battery power-on package is solved, and the user generally needs to stop first, and then connect.

Description

Technical Field

[0001] This invention relates to the technical field of energy storage battery packs, and more particularly to an energy storage battery pack parallel operation system and parallel operation method. Background Technology

[0002] Currently, energy storage battery packs have a wide range of applications in the market. In order to obtain a larger capacity, energy storage battery packs are usually equipped with external battery charging packs.

[0003] Existing external battery charging packs are usually electrically connected to the energy storage battery pack in parallel or series. Since the control logic is usually performed after the overall connection is completed, when adding a battery charging pack, the user usually needs to shut down the entire system first, and then connect it in parallel or series. Summary of the Invention

[0004] This invention provides a parallel operation system and method for energy storage battery packs to solve the problem that when existing energy storage battery packs need to be connected to additional battery charging packs, users usually need to shut down the entire system first and then connect them.

[0005] According to one aspect of the present invention, a parallel operation system for energy storage battery packs is provided, the parallel operation system for energy storage battery packs includes a main pack, a power supply pack, and a connection assembly;

[0006] The number of power-on packs is multiple, and the multiple power-on packs are electrically connected sequentially through the connecting component. The first power-on pack among the multiple power-on packs is electrically connected to the main pack through the connecting component.

[0007] The power-on package is used to provide a first enable code when electrically connected to the parallel system via the connection component, so that the power-on package or the master package that receives the first enable code issues an encoding request signal;

[0008] The master packet is used to issue an encoding enable signal based on the encoding request signal, so that the power-on packet that receives the first enable code or the master packet issues a second enable code when it obtains the encoding enable signal, so that the power-on packet electrically connected to the parallel system completes address encoding based on the second enable code and informs the master packet that the encoding is complete.

[0009] In an optional embodiment of the present invention, the connection component includes a bus, a communication line, a first encoding line, and a second encoding line;

[0010] The power-on package is used to provide the first enable code through the first encoding line when the bus receives the bus voltage;

[0011] The power-on packet and the main packet are used to send the encoding request signal through the communication line when the first enable code is received on the first encoding line;

[0012] The power-on package is used to send the second enable code through the second encoding line when the encoding enable signal is received;

[0013] The power-on packet is used to complete address encoding when the second enable encoding is obtained on the second encoding line, and to inform the master packet that the encoding is complete through the communication line.

[0014] In an optional embodiment of the present invention, the power-on package is further used for:

[0015] If the first encoding line does not receive the first enable code within a preset time, it determines itself as the last power-on packet and informs the master packet encoding is complete through the communication line.

[0016] In an optional embodiment of the present invention, when the last power-on packet receives the first enable code through the first encoding line, it sends an encoding increment signal through the communication line.

[0017] The main packet is also used to issue the encoded enable signal based on the encoded add signal.

[0018] In an optional embodiment of the present invention, the power-on packet is used to send power-on packet status information and parameter information to the main packet after encoding is completed;

[0019] The master package is used to control the charging and discharging state of the power pack based on the power pack status information and the parameter information.

[0020] In an optional embodiment of the present invention, the connection component further includes a switch line, wherein a manually operated normally closed switch is provided on the switch line, and the manually operated normally closed switch is used to disconnect the switch line when it is opened;

[0021] The main package is used to control the power supply package, which disconnects the switch line during the charging and discharging process, to stop charging and discharging.

[0022] In an optional embodiment of the present invention, the connection component includes an input port and an output port, the main package includes at least one output port, and the power-on package includes at least one input port and at least one output port;

[0023] The main package is electrically connected to the input port of the power-on package by plugging in the output port;

[0024] The power-on pack connects to the parallel system by interlocking its output port with the input port of the next power-on pack.

[0025] Both the input port and the output port include the switch line;

[0026] The input port is used to electrically connect the switch line when it is plugged into the output port, and to disconnect the switch line when it is pulled out.

[0027] The normally closed manual switch is used to disconnect the switch line when a pressing operation is performed.

[0028] In an optional embodiment of the present invention, the manually operated normally closed switch includes a locking part, an unlocking part, and a switching part;

[0029] The locking part is used to lock the input port and the output port during insertion so that the input port and the output port are fixed relative to each other, and to unlock the input port and the output port so that the input port and the output port can be pulled out relative to each other;

[0030] The unlocking part is connected to the locking part, and is used to lock and unlock the locking part;

[0031] The switch part is connected to the unlocking part. When the unlocking part receives a pressing operation, it can cause the switch part to disconnect the switch line and drive the locking part to unlock. The moment when the switch part disconnects the switch line is before the moment when the locking part unlocks.

[0032] According to another aspect of the present invention, a method for parallel operation of energy storage battery packs is provided. This method is used in the energy storage battery pack parallel operation system described in any embodiment of the present invention, and the method includes:

[0033] A coding request signal is issued based on the first enable code provided by the power-on package, which is electrically connected to the parallel system via the connection component;

[0034] Based on the encoding request signal, an encoding enable signal is issued, so that the power-on package that receives the first enable code issues a second enable code when it obtains the encoding enable signal or issues a second enable code based on the encoding enable signal, so that the power-on package electrically connected to the parallel system completes address encoding based on the second enable code;

[0035] Obtain the encoding completion signal sent when the power-on package completes address encoding.

[0036] According to another aspect of the present invention, a method for parallel operation of energy storage battery packs is provided. This method is used in the energy storage battery pack parallel operation system described in any embodiment of the present invention, and the method includes:

[0037] A coding request signal is issued based on the first enable code provided by the power-on package, which is electrically connected to the parallel system via the connection component;

[0038] Obtain the encoding permission signal issued by the main packet based on the encoding request signal;

[0039] Based on the encoded enable signal, a second enable code is issued so that the power-on package electrically connected to the parallel system completes address encoding based on the second enable code and informs the master package that the encoding is complete.

[0040] According to another aspect of the present invention, a method for parallel operation of energy storage battery packs is provided. This method is used in the energy storage battery pack parallel operation system described in any embodiment of the present invention, and the method includes:

[0041] The first enable code is issued when the connection component is electrically connected to the parallel system;

[0042] Obtain the second enable code based on the feedback from the first enable code;

[0043] The address encoding is completed based on the second enable code, and the main packet encoding is then notified that it is complete.

[0044] The technical solution of this invention, through the setting of a master pack and a power pack, allows the power pack to actively provide a first enable code when electrically connected to the parallel system. Upon receiving the first enable code, the power pack or master pack sends an encoding request signal. The master pack then sends an encoding permission signal based on the encoding request signal. Subsequently, the power pack or master pack, upon receiving the encoding permission signal, sends a second enable code. Finally, the power pack electrically connected to the parallel system completes address encoding based on the second enable code and informs the master pack that encoding is complete. This completes the addition of the power pack. Therefore, each power pack automatically performs logic control upon connection to the parallel system, enabling address encoding of the newly added power pack and its integration into the system. Unlike existing parallel systems that require a complete shutdown, connection of all power packs and the master pack, and subsequent power-on for logic control, this solution addresses the problem of existing energy storage battery packs typically requiring a complete shutdown before adding power packs. This solution eliminates the need for user shutdown, allowing for flexible capacity increases in the parallel system while meeting user needs.

[0045] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of a parallel operation system for an energy storage battery pack provided in Embodiment 1 of the present invention;

[0048] Figure 2 This is a schematic diagram of the electrical connection between an input port and an output port provided in Embodiment 1 of the present invention;

[0049] Figure 3 This is a schematic diagram of a manually operated normally closed switch provided in Embodiment 1 of the present invention;

[0050] Figure 4 This is a flowchart of a parallel operation method for an energy storage battery pack provided in Embodiment 2 of the present invention;

[0051] Figure 5 This is a flowchart of a parallel operation method for an energy storage battery pack provided in Embodiment 3 of the present invention;

[0052] Figure 6 This is a flowchart of a parallel operation method for an energy storage battery pack provided in Embodiment 4 of the present invention.

[0053] The components are as follows: 1. Main unit; 2. Power supply unit; 3. Connecting assembly; 31. Input port; 32. Output port; 33. Busbar; 34. Communication line; 35. First encoding line; 36. Second encoding line; 37. Switch line; 38. Power supply line; 4. Manual normally closed switch; 41. Locking part; 42. Unlocking part; 421. Pressing part; 422. Unlocking lever; 423. Elastic part; 43. Switch part; 44. Rotating shaft; 5. Locking groove. Detailed Implementation

[0054] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] Example 1

[0057] Figure 1 This is a schematic diagram of a parallel operation system for an energy storage battery pack provided in Embodiment 1 of the present invention, as shown below. Figure 1 As shown, the energy storage battery pack parallel system includes a main pack 1, a power supply pack 2, and a connection assembly 3.

[0058] There are multiple power-on packs 2, which are electrically connected sequentially via a connecting component 3. The first power-on pack 2 among the multiple power-on packs 2 is electrically connected to the main pack 1 via the connecting component 3.

[0059] When the power pack 2 is electrically connected to the parallel system via the connection component 3, it provides a first enable code so that the power pack 2 or the main pack 1 that receives the first enable code issues an encoding request signal.

[0060] The main packet 1 is used to issue an encoding enable signal based on the encoding request signal, so that the power-on packet 2 that receives the first enable code or the main packet 1 issues a second enable code when it obtains the encoding enable signal, so that the power-on packet 2, which is electrically connected to the parallel system, completes the address encoding based on the second enable code and informs the main packet 1 that the encoding is complete.

[0061] In this system, the main battery pack 1 refers to the energy storage battery pack that primarily performs logic control and provides power to users, while the additional battery pack 2 refers to the battery packs added to expand the capacity. When the main battery pack 1 and the additional battery pack 2 are electrically connected, the capacity of the entire energy storage battery pack parallel system will be increased compared to when only the main battery pack 1 is connected. The more additional battery packs 2 there are, the higher the capacity of the entire energy storage battery pack parallel system will be.

[0062] Connection component 3 refers to the component that enables electrical connection between the main power pack 1 and the power pack 2, as well as between two adjacent power packs 2. Multiple power packs 2 are sequentially connected via connection component 3. This means that the input terminal of each power pack 2 is connected to the previous power pack 2 via connection component 3, and its output terminal is connected to the next power pack 2 via connection component 3. The first power pack 2 in the multiple power packs is connected to the main power pack 1 via connection component 3. That is, when there are multiple power packs 2, the first power pack 2 is electrically connected to the main power pack 1 via connection component 3, then the second power pack 2 is electrically connected to the first power pack 2 via connection component 3, then the third power pack 2 is electrically connected to the second power pack 1 via connection component 3, and so on, until all power packs 2 are connected to the parallel system.

[0063] A parallel system refers to a system including a main pack 1 and one or more power packs 2. When only the main pack 1 exists, the power pack 2 connected to the main pack 1 is electrically connected to the parallel system after being connected to the host. When a power pack 2 already exists connected to the main pack 1, the next power pack 2 will be electrically connected to the previous power pack 2 to achieve electrical connection to the parallel system. When it is necessary to add a power pack 2 to the existing parallel system, the added power pack 2 will be electrically connected to the last power pack 2 in the parallel system to achieve electrical connection to the parallel system. At this time, the power pack 2 electrically connected to the parallel system through the connection component 3 will provide a first enable code. Since the power pack 2 electrically connected to the parallel system may be the first power pack 2 electrically connected to the main pack 1, or it may be the power pack 2 electrically connected to the subsequent power pack 2, the one receiving the first enable code may be either the main pack 1 or a power pack 2. The first enable code is the code that reflects the electrical connection of the power pack 2 to the parallel system.

[0064] When the power pack 2, which is electrically connected to the parallel system, provides the first enable code, the power pack 2 or the main pack 1, which is electrically connected to the power pack 2, will receive the first enable code and then send an encoding request signal. The encoding request signal is a signal that requests the main pack 1 to encode the newly added power pack 2.

[0065] The encoding enable signal is the signal that allows encoding of the newly added power-on package 2. The second enable code is the code used to enable power-on package 2 to complete address encoding. When power-on package 2 receives the first enable code or when master package 1 receives the encoding enable signal, it indicates that the system allows encoding of the newly added power-on package 2, and thus issues the second enable code. Power-on package 2, electrically connected to the parallel system, then completes address encoding based on the second enable code. Power-on package 2 can notify master package 1 of the encoding completion via communication. This completes the addition of power-on package 2. Each power-on package 2 will automatically undergo logic control upon connection to the parallel system to perform address encoding and add it to the system.

[0066] In the above scheme, by setting up a master package 1 and a power-on package 2, when the power-on package 2 is electrically connected to the parallel system, it will actively provide a first enable code. At this time, the power-on package 2 or the master package 1 that receives the first enable code will send an encoding request signal. Then, the master package 1 sends an encoding allow signal based on the encoding request signal. Subsequently, when the power-on package 2 or the master package 1 that receives the first enable code obtains the encoding allow signal, it sends a second enable code. Finally, the power-on package 2 that is electrically connected to the parallel system completes the address encoding based on the second enable code and informs the master package 1 that the encoding is complete. This completes the addition of power pack 2. Each power pack 2 will automatically undergo logic control upon connection to the parallel system, enabling address encoding of the newly added power pack 2 and its integration into the system. Unlike existing parallel systems that require a complete shutdown before connecting all power packs 2 and the main pack 1, this eliminates the need for a system shutdown and subsequent logic control. It solves the problem that adding a power pack 2 to an existing energy storage battery pack typically requires a complete system shutdown before connection, allowing for flexible capacity increases in the parallel system without user shutdown.

[0067] In optional embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the connection component 3 includes a bus 33, a communication line 34, a first encoding line 35, and a second encoding line 36.

[0068] The power-on package 2 is used to provide a first enable code via the first code line 35 when the bus voltage is obtained at the bus 33.

[0069] The power-on package 2 and the main package 1 are used to send an encoding request signal through the communication line 34 when the first encoding line 35 receives the first enable code.

[0070] The power-on package 2 is used to issue a second enable code via the second encoding line 36 when an encoding enable signal is received.

[0071] The power-on packet 2 is used to complete the address encoding when the second enable code is obtained by the second encoding line 36, and to inform the main packet 1 that the encoding is complete via the communication line 34.

[0072] The connecting component 3 includes a busbar 33, a communication line 34, a first encoding line 35, and a second encoding line 36. When the main package 1 and the power-on package 2 are connected, the busbar 33, communication line 34, first encoding line 35, and second encoding line 36 between them are electrically connected. The main package 1 outputs busbar voltage through busbar 33. When the power-on package 2 is electrically connected to the main package 1, it receives the busbar voltage from busbar 33; that is, a busbar voltage exists on busbar 33 of the power-on package 2 connected to the parallel system. When a power-on package 2 is added, the added power-on package 2 is electrically connected to the parallel system, and its busbar 33 receives the busbar voltage. Specifically, busbar 33 includes a positive busbar 33 and a negative busbar 33.

[0073] The first encoding line 35 is a signal line used to receive or transmit the first enable code, the communication line 34 is a signal line used to provide communication signals for communication, and the second encoding line 36 is a signal line used to receive or transmit the second enable code.

[0074] By including a busbar 33, a communication line 34, a first encoding line 35, and a second encoding line 36 in the connection component 3, when the power pack 2 is connected to the parallel system, the busbar 33, communication line 34, first encoding line 35, and second encoding line 36 of the power pack 2 will be connected one-to-one with the busbar 33, communication line 34, first encoding line 35, and second encoding line 36 of the adjacent power pack 2 or main pack 1. Thus, the power pack 2 connected to the parallel system can provide a first enable code to the previous power pack 2 or host through the first encoding line 35, and can also receive a second enable code from the previous power pack 2 or host through the second encoding line 36 for address encoding. After the encoding is completed, it can inform the main pack 1 that the encoding is complete through the communication line 34. When a next power-on pack 2 is added to the system, it can receive the first enable code from the next power-on pack 2 through the first encoding line 35, and can also send an encoding request signal to the host through the communication line 34. At the same time, when the encoding permission signal is obtained, it can send the second enable code to the next power-on pack 2 through the second encoding line 36.

[0075] In an optional embodiment of the present invention, the power-on packet 2 is further configured to: determine itself as the last power-on packet 2 when the first encoding line 35 does not receive the first enable code within a preset time, and notify the main packet 1 that the encoding is complete through the communication line 34.

[0076] In normal operation of the parallel system, the number of power packs 2 is usually fixed, and multiple power packs 2 are connected sequentially. The connection time between two adjacent power packs 2 will not be too long. The preset time is the time required for two power packs 2 to connect when they are connected to the parallel system in the same batch. That is, during normal operation, power pack 2 will receive the first enable code from the next power pack 2 within the preset time. However, the last power pack 2 will not receive the first enable code from the next power pack 2 because it is the last one. Therefore, power pack 2 is used to determine that it is the last power pack 2 when the first enable code line 35 does not receive the first enable code within the preset time, so as to facilitate communication between the main pack 1 and the last power pack 2 to determine the total number of power packs 2.

[0077] Based on the above embodiment, the main package 1 is used to communicate with the last power-on package 2 to determine the total number of power-on packages 2, and enters the working state after determining the total number of power-on packages 2. Since each power-on package 2 is address-encoded after being electrically connected to the parallel system, when the main package 1 communicates with the last power-on package 2, it can determine the total number of power-on packages 2 based on the number of address codes, and thus enter the working state.

[0078] In an optional embodiment of the present invention, when the final power-on package 2 receives the first enable code through the first encoding line 35, it sends an encoding increase signal through the communication line 34.

[0079] Main packet 1 is also used to issue an encoded enable signal based on the encoded increment signal.

[0080] The code addition signal refers to the signal indicating that the master package 1 needs to add code. When a power-on package 2 is added during the normal operation of the parallel system, the added power-on package 2 will be electrically connected to the last power-on package 2 to achieve electrical connection to the parallel system. Therefore, at this time, there will be bus voltage on the bus 33 of the added power-on package 2. The bus voltage will wake up the power-on package 2, and then the added power-on package 2 will send the first enable code through the first encoding line 35. The last power-on package 2 will receive the first enable code sent by the added power-on package 2. At this time, the last power-on package 2 communicates with the master package 1 through the communication line 34 and sends a code addition signal. The master package 1 can then send a code enable signal based on the code addition signal. When the last power-on package 2 receives the code enable signal, it can enable the added power-on package 2 to perform address encoding. That is, the last power-on package 2 will send a second enable code to the added power-on package 2, and the added power-on package 2 can then perform address encoding through the second enable code. Therefore, even when adding a power pack 2 during normal operation of the parallel system, there is no need to shut down the entire system. This solves the problem that portable energy storage battery packs do not require users to stop the system during use, meeting user needs while flexibly increasing system capacity.

[0081] In an optional embodiment of the present invention, the power-on packet 2 is used to send power-on packet 2 status information and parameter information to the main packet 1 after encoding is completed. The main packet 1 is used to control the charging and discharging state of the power-on packet 2 based on the power-on packet 2 status information and parameter information.

[0082] Among them, the status information of power pack 2 refers to the current working state of power pack 2, and the parameter information refers to the parameter information of power pack 2 related to charging and discharging. The coded power pack 2 sends the status information and parameter information to the master pack 1. The master pack 1 can then control the charging and discharging state of power pack 2 based on the status information and parameter information of power pack 2. Since the capacity, voltage and other parameters of each power pack 2 may be different in actual applications, it is not conducive to the optimization of the overall system performance if all power pack 2 are charged and discharged at the same time. For example, there may be a large voltage difference between two power pack 2. If the power pack 2 with the lower voltage is discharged directly, it is easy to be damaged. By controlling the charging and discharging state of power pack 2 according to the actual state of each power pack 2, the performance of the parallel system can be improved. The specific logic for determining the charging and discharging state of power pack 2 based on its status and parameter information will vary depending on the parallel system. For example, a system voltage threshold can be set, with power pack 2 charging when the voltage is below the threshold and discharging when the voltage is above the threshold, so that the voltage of power pack 2 in the entire parallel system can be made to be equal. Alternatively, the voltage difference of power pack 2 can be determined, a voltage difference threshold can be set, and the charging and discharging state of power pack 2 can be controlled based on the voltage difference. No specific limitation is made here, and users can set the system according to their actual needs.

[0083] Specifically, the power pack 2 typically includes a charging switch MOS and a discharging switch MOS. The main pack 1 can control the power bank status of the power pack 2 by controlling the states of the charging switch MOS and the discharging switch MOS.

[0084] In an optional embodiment of the present invention, the connection component 3 further includes a switch line 37, on which a manual normally closed switch 4 is provided. The manual normally closed switch 4 is used to disconnect the switch line 37 when it is opened. The main package 1 is used to control the power supply package 2, which is disconnected by the switch line 37, to stop charging and discharging during the charging and discharging process.

[0085] The manual normally closed switch 4 is initially closed, but opens after user operation. When the manual normally closed switch 4 is opened by user operation, it opens, causing switch line 37 to disconnect. When the manual normally closed switch 4 of a power pack 2 opens, causing switch line 37 to disconnect, the switch lines 37 of subsequent power packs 2 connected to that power pack 2 will also disconnect. At this time, the main unit 1 will control the power pack 2 with disconnected switch lines 37 to stop charging and discharging. Thus, when the parallel system is charging and discharging, if the manual normally closed switch 4 is manually operated to disconnect switch line 37, all switch lines 37 of subsequent power packs 2 connected to that power pack 2 will disconnect. The main unit will then control the power pack 2 and its subsequent power packs 2 to stop charging and discharging, ensuring that the power pack 2 and the user are not damaged by high current electrical arcing due to the user suddenly unplugging the power pack 2. The portable energy storage battery pack solves the problem of not requiring users to stop using it, meeting user needs while flexibly increasing or decreasing system capacity, achieving plug-and-play functionality, and ensuring product and user safety.

[0086] Based on the above embodiments, the connection component 3 includes an input port 31 and an output port 32, the main package 1 includes at least one output port 32, and the power-on package 2 includes at least one input port 31 and at least one output port 32.

[0087] The main package 1 is electrically connected to the input port 31 of the power package 2 by plugging in the output port 32.

[0088] The next power pack 2 is electrically connected to the parallel system by plugging its output port 32 into its input port 31.

[0089] Both input port 31 and output port 32 include switch line 37.

[0090] The input port 31 is used to electrically connect the switch line 37 when it is plugged into the output port 32, and to disconnect the switch line 37 when it is pulled out.

[0091] The manual normally closed switch 4 is used to disconnect the switch line 37 when a pressing operation is received.

[0092] The input port 31 and the output port 32 refer to a pair of connectors that can be plugged together to achieve an electrical connection. In practical applications, the input port 31 and the output port 32 can have different forms according to the usage requirements. For example, the input port 31 can be inserted into the output port 32, or the output port 32 can be inserted into the input port 31. There is no specific limitation on the plugging method of the two, as long as the two can be plugged together to achieve an electrical connection. By setting at least one output port 32 on the main pack 1 and at least one input port 31 and at least one output port 32 on the power pack 2, the main pack 1 and multiple power packs 2 can be electrically connected sequentially through the input port 31 and the output port 32. Simply plugging the output port 32 of the main pack 1 into the input port 31 of the first power pack 2 will connect the main pack 1 and the first power pack 2. Then, plugging the input port 31 of the second power pack 2 into the output port 32 of the first power pack 2 will connect the second power pack 2 to the parallel system. Then, plugging the input port 31 of the third power pack 2 into the output port 32 of the second power pack 2 will connect the third power pack 2 to the parallel system, and so on, until all power packs 2 are electrically connected to the parallel system, thus realizing the sequential electrical connection of multiple power packs 2.

[0093] The manual normally closed switch 4 can receive a press operation to disconnect the switch line 37. Therefore, when the parallel system is charging or discharging, if it is necessary to reduce the power pack 2, the manual normally closed switch 4 can be pressed manually to disconnect the switch line 37. At this time, the switch lines 37 on all power packs 2 that are subsequently electrically connected to the manual normally closed switch 4 will be disconnected. As a result, the host will control the power pack 2 and the power packs 2 that are subsequently electrically connected to the power pack 2 to stop charging and discharging, ensuring that the power pack 2 and the user's safety will not be damaged by a large current electrical arc due to the user suddenly pulling out the power pack 2.

[0094] Based on the above embodiments, such as Figure 2 and Figure 3 As shown, the manual normally closed switch 4 includes a locking part 41, an unlocking part 42, and a switching part 43.

[0095] The locking part 41 is used to lock the input port 31 and the output port 32 during insertion so that the input port 31 and the output port 32 are relatively fixed, and to unlock the input port 31 and the output port 32 so that the input port 31 and the output port 32 can be pulled out relative to each other.

[0096] The unlocking part 42 is connected to the locking part 41 and is used to lock and unlock the locking part 41.

[0097] The switch part 43 is connected to the unlocking part 42. When the unlocking part 42 receives a pressing operation, it can cause the switch part 43 to disconnect the switch line 37 and drive the locking part 41 to unlock. The moment when the switch part 43 disconnects the switch line 37 is before the moment when the locking part 41 unlocks.

[0098] The locking part 41 is a component that can lock and unlock the input port 31 and the output port 32, making the connection between the input port 31 and the output port 32 more stable and preventing accidental disconnection. The unlocking part 42 is a component that can change the state of the locking part 41. The switch part 43 is a component that can open and close the switch line 37 and can be connected in series with the switch line 37.

[0099] When the unlocking unit 42 receives a press operation, it can cause the switch unit 43 to disconnect the switch line 37 and drive the locking unit 41 to unlock. At the same time, the moment when the switch unit 43 disconnects the switch line 37 is before the moment when the locking unit 41 unlocks. Therefore, in practical applications, if the user wants to reduce the number of power packs 2 and needs to pull them out, the user needs to press the switch unit 43 first, so that the unlocking unit 42 drives the locking unit 41 to unlock the input port 31 and the output port 32. Only then can the input port 31 and the output port 32 be pulled out relative to each other. Before this, the switch line 37 will be disconnected. When the switch line 37 is disconnected, the host will control the power pack 2 and the power pack 2 that is subsequently electrically connected to the power pack 2 to stop charging and discharging. Thus, when the power pack 2 is actually pulled out, the power pack 2 will stop working first, and then it can be pulled out. This ensures that the connector will not be damaged by a large current electrical arc due to the user suddenly pulling it out, and the user's safety will be ensured. This achieves plug-and-play functionality and prevents damage from accidental disconnection, ensuring the safety of the product and the user.

[0100] For example, one of the input port 31 and the output port 32 is provided with a locking groove 5, and a locking part 41 is provided on the other of the input port 31 and the output port 32. When the input port 31 and the output port 32 are inserted into each other, the locking part 41 is inserted into the locking groove 5, so that the input port 31 and the output port 32 cannot be pulled out relative to each other. The manual normally closed switch 4 also includes a rotating shaft 44. The unlocking part 42 includes a pressing member 421, an unlocking rod 422 and an elastic member 423. The pressing member 421 and the locking part 41 are located at both ends of the unlocking rod 422. The middle of the unlocking rod 422 is connected to the rotating shaft 44. The elastic member 423 is connected to the lower end of the pressing member 421. In the natural state, the locking part 41 is inserted into the locking groove 5. So when the pressing member 421 is pressed, it can drive the locking part 41 to rotate around the rotating shaft 44 to unlock. When the pressing member 421 is not pressed, the locking part 41 will be inserted into the locking groove 5 to lock.

[0101] There are two elastic elements 423. One elastic element 423 is located between the pressing member 421 and the unlocking lever 422, and the other elastic element 423 is located at the lower end of the unlocking lever 422, with the axes of the two elastic elements 423 coinciding. The switch part 43 is located at the lower end of the pressing member 421. When the pressing member 421 is pressed, the elastic element 423 between the pressing member 421 and the unlocking lever 422 is compressed first. At this time, the switch part 43 disconnects the switch wire 37. Then, the elastic element 423 at the lower end of the unlocking lever 422 is compressed, and the unlocking lever 422 drives the locking part 41 to rotate around the pivot 44 to unlock. This achieves the goal that when the unlocking part 42 receives a pressing operation, it can cause the switch part 43 to disconnect the switch wire 37 and drive the locking part 41 to unlock. The moment when the switch part 43 disconnects the switch wire 37 is before the moment when the locking part 41 unlocks.

[0102] Furthermore, both input port 31 and output port 32 may include a bus 33, a communication line 34, a first encoding line 35, and a second encoding line 36. When the two are plugged into each other, the bus 33, communication line 34, first encoding line 35, and second encoding line 36 will also be connected accordingly. Optionally, there may be two buses 33, one positive and the other negative.

[0103] Specifically, communication line 34 is at least one of CAN bus and RS485 bus. Correspondingly, the number of communication lines 34 can be two. For example, when communication line 34 is a CAN bus, the two communication lines 34 are CANH and CANL respectively; when communication line 34 is an RS485 bus, the two communication lines 34 are RS485A and RS485B respectively.

[0104] In an optional embodiment of the present invention, both input port 31 and output port 32 may include power lines 38 for providing power signals. There may be two power lines 38, one for positive power and the other for ground.

[0105] The following specific embodiment illustrates the methods for adding and removing power pack 2 under different conditions in this energy storage battery pack parallel operation system:

[0106] The initial power-on process of the parallel system: The main package 1 is powered on first, and its own charging switch MOS and discharging switch MOS are closed to complete the current on bus 33 and enter normal operation. At this time, there is bus voltage on bus 33 of the main package 1, waiting for the power package 2 to be inserted. When power pack 2 is normally inserted into the parallel system via connection component 3 (at this time, for the first power pack 2, it is connected to the main pack 1, and for subsequent power pack 2, it is connected to the previous power pack 2), the bus 33, communication line 34, first encoding line 35, and second encoding line 36 are electrically connected, and the manual normally closed switch 4 is normally closed, and the switch line 37 is also electrically connected. The bus 33 of power pack 2 obtains the bus voltage through the connection, and wakes up power pack 2 using the internally designed wake-up signal line, i.e., using the bus voltage. Power pack 2 enters the working process, and after detecting no faults, it provides the first enable code to notify the main pack 1 or the previous power pack 2 to request encoding. The main pack 1 or the previous power pack 2 sends an encoding request signal through communication to inform the main pack 1 that encoding needs to be added. The main pack 1 broadcasts an encoding enable signal, and the main battery pack or the previous power pack 2 will send the second enable code to power pack 2. Power pack 2 receives the second enable code, completes the address encoding, and informs the main pack 1 that the encoding is complete through communication broadcast. The coded power-on pack 2 transmits its current status and parameter information to the master pack 1 via communication. The master pack 1 then controls the charging and discharging state of the power-on pack 2 based on this information. If the power-on pack 2 detects that its first encoding line 35 has received the first enable code according to the above process, it will encode the next power-on pack 2 according to the above process. This continues until the first encoding line 35 has not received the first enable code within a preset time. At this point, the power-on pack 2 is determined to be the last power-on pack 2 and notifies the master pack 1 of the encoding completion via communication line 34. The master pack 1 then completes the determination of the number of power-on packs 2 in the system and other overall calculations, and the system enters normal operating status.

[0107] The process of adding power pack 2 during parallel system operation: During system operation, when the last power pack 2 receives the first enable code via the first encoding line 35, it sends an encoding addition signal via communication line 34. The main battery pack 1 sends an encoding enable signal based on the encoding addition signal. Simultaneously, the last power pack 2 outputs a second enable code to the added power pack 2. Upon receiving the second enable code, the added power pack 2 completes the address encoding and notifies the main battery pack of encoding completion via communication broadcast. The encoded power pack 2 transmits its current status and parameter information to the main battery pack 1 via communication. The main battery pack 1 controls the charging and discharging state of the power pack 2 based on its status and parameter information. If the power pack 2 detects that its first encoding line 35 has received the first enable code according to the above process, it encodes the next power pack 2 according to the above process. This continues until the first encoding line 35 does not receive the first enable code within a preset time, at which point the power pack 2 is determined to be the last power pack 2 and notifies the main battery pack 1 of encoding completion via communication line 34. Once the main package 1 completes the determination of the number of power-on packages 2 and other overall calculations, the system enters normal working state. This enables the addition of power-on packages 2 during use without requiring a complete power outage; simply insert the power-on package 2 into the existing last power-on package 2.

[0108] To reduce the charging / discharging process of the power pack 2 during parallel system operation: If the unlocking part 42 of the manual normally closed switch 4 is pressed manually during the charging / discharging process of the parallel system, the unlocking part 42 will cause the switch part 43 to disconnect the switch line 37 and unlock the locking part 41. At the same time, the moment when the switch part 43 disconnects the switch line 37 is before the moment when the locking part 41 unlocks. Therefore, the input port 31 and the output port 32 can be pulled out relative to each other when the unlocking part 42 is pressed. Before this, the switch line 37 will be disconnected. When the switch line 37 is disconnected, the host will control the power pack 2 and the power pack 2 connected to it to stop charging and discharging. Thus, when the power pack 2 is actually pulled out, the power pack 2 will stop working first and then it can be pulled out. This ensures that the connector and user safety will not be damaged by large current electrical arcing due to the user suddenly pulling it out. It achieves plug-and-play, no damage from accidental disconnection, and ensures the safety of the product and the user. In addition, when the normally closed manual switch 4 disconnects the power pack 2 connected to switch line 37 and the power pack 2 subsequently connected to it stops charging and discharging, the discharge function of the main battery pack can be immediately checked to maintain the normal discharge function of the parallel system until the parallel system shuts down due to undervoltage protection. If it is necessary to add power pack 2 during the process, the number of power pack 2 in the parallel system can be increased according to the above-described process for adding power pack 2.

[0109] Example 2

[0110] Figure 4This is a flowchart illustrating a parallel operation method for an energy storage battery pack according to Embodiment 2 of the present invention. This parallel operation method is used in the energy storage battery pack parallel operation system described in any embodiment of the present invention. The parallel operation method can be implemented in hardware and / or software, and can be configured within the main battery pack. Figure 4 As shown, the parallel operation method for the energy storage battery pack includes:

[0111] S110, Based on the first enable code provided by the power-on package electrically connected to the parallel system via the connection component, issue an encoding request signal.

[0112] When a power-on pack needs to be added to the original parallel system, the added power-on pack will provide a first enable code when it is electrically connected to the parallel system through the connection component. At this time, the power-on pack or the main pack electrically connected to the added power-on pack through the connection component will send an encoding request signal based on the first enable code, so that the main pack can obtain the encoding request signal.

[0113] S120. Based on the encoding request signal, an encoding enable signal is issued so that the power-on package that received the first enable code issues a second enable code when it obtains the encoding enable signal or issues a second enable code based on the encoding enable signal, so that the power-on package electrically connected to the parallel system completes address encoding based on the second enable code.

[0114] Since the power-on package electrically connected to the parallel system may be the first power-on package electrically connected to the master package, or it may be a power-on package electrically connected to another power-on package, the package receiving the first enable code may be either a power-on package or the master package. When it is a power-on package, the power-on package that receives the first enable code will issue a second enable code upon obtaining the code enable signal. When it is a master package, the master package will directly issue the second enable code based on the code enable signal. When the power-on package electrically connected to the parallel system receives the second enable code, address encoding can be completed.

[0115] S130. Obtain the encoding completion signal sent when the power-on package completes address encoding.

[0116] The encoding completion signal is a signal that informs the master packet that encoding has been completed. When the power-on packet completes address encoding, it will inform the master packet that encoding is complete.

[0117] The above scheme issues an encoding request signal based on a first enable code provided by a power-on pack electrically connected to the parallel system via a connection component. Then, based on the encoding request signal, it issues an encoding allow signal. This causes the power-on pack receiving the first enable code to issue a second enable code upon receiving the encoding allow signal, or to issue a second enable code based on the encoding allow signal, thus enabling the power-on pack electrically connected to the parallel system to complete address encoding based on the second enable code. Finally, it obtains an encoding completion signal issued when the power-on pack completes address encoding. Therefore, each power-on pack automatically performs logic control upon connecting to the parallel system, enabling address encoding of newly added power-on packs and adding them to the system. Unlike existing parallel systems that require a complete shutdown, connecting all power-on packs and the main pack before restarting for logic control, this scheme solves the problem that existing energy storage battery packs typically require a complete shutdown before adding battery power-on packs. It achieves a solution that eliminates the need for user shutdown, meeting user needs while flexibly increasing the capacity of the parallel system.

[0118] In an optional embodiment of the present invention, before obtaining the encoding completion signal emitted when the power-on package completes address encoding, the method further includes:

[0119] Acquire the encoded signal.

[0120] Based on the encoding increment signal, an encoding enable signal is issued, so that the power-on package that receives the first enable code issues a second enable code when it obtains the encoding enable signal or issues a second enable code based on the encoding enable signal, so that the power-on package electrically connected to the parallel system completes address encoding based on the second enable code.

[0121] The "encoding increase signal" refers to a signal indicating that the master pack needs to add encoding. When a power pack is added during normal operation of the parallel system, the added power pack is electrically connected to the last power pack via a connection component to connect to the parallel system. Therefore, the bus of the added power pack will have bus voltage, which will wake up the power pack. The added power pack will then send a first enable code via the first encoding line. The last power pack will receive the first enable code from the added power pack. At this time, the last power pack communicates with the master pack via the communication line and sends an encoding increase signal. The master pack can then issue an encoding enable signal based on the encoding increase signal. When the last power pack receives the encoding enable signal, it can enable the added power pack to perform address encoding, that is, the last power pack will send a second enable code to the added power pack, which can then perform address encoding. Thus, even when adding a power pack during normal operation of the parallel system, there is no need for a complete system shutdown. This solves the problem of portable energy storage battery packs not requiring user shutdown during use, meeting user needs while flexibly increasing system capacity.

[0122] In an optional embodiment of the present invention, after obtaining the encoding completion signal emitted when the power-on package completes address encoding, the method further includes:

[0123] Obtain the status and parameter information of the power supply.

[0124] The charging and discharging state of the power pack is controlled based on the power pack status information and the parameter information.

[0125] Among them, the power pack status information refers to the current working state of the power pack, and the parameter information refers to the parameter information of the power pack related to charging and discharging. The encoded power pack sends the power pack status information and parameter information to the master pack, and the master pack can control the charging and discharging state of the power pack based on the power pack status information and parameter information. In actual applications, the capacity, voltage and other parameters of each power pack may be different. If all power packs are charged and discharged uniformly, it is not conducive to the optimization of the overall system performance. For example, there may be a large voltage difference between two power packs. If the power pack with the lower voltage is discharged together, it is easy to be damaged. By controlling the charging and discharging state of the power pack according to the actual state of each power pack, the performance of the parallel system can be improved.

[0126] In an optional embodiment of the present invention, the parallel operation method for the energy storage battery pack further includes:

[0127] When the power supply is in the process of charging or discharging, the switch line is disconnected and the power supply stops charging or discharging.

[0128] When the manually closed switch of a power pack is opened, causing the switch line to disconnect, since multiple power packs are sequentially connected via connecting components, the switch lines of all subsequent power packs connected to that power pack will also disconnect. At this time, the main unit will control the power pack with the disconnected switch line to stop charging and discharging. Therefore, when the parallel system is charging and discharging, if the manually closed switch is manually operated to disconnect the switch line, all switch lines on all power packs subsequently connected to that power pack will disconnect. The main unit will then control that power pack and all subsequent power packs to stop charging and discharging, ensuring that high-current electrical arcing will not damage the power pack or the user due to the user suddenly unplugging the power pack, thus ensuring the safety of both the power pack and the user. This solution addresses the issue of portable energy storage battery packs not requiring user shutdown during use, meeting user needs while flexibly increasing or decreasing system capacity, achieving plug-and-play functionality, and ensuring product and user safety.

[0129] In an optional embodiment of the present invention, the parallel operation method for the energy storage battery pack further includes:

[0130] Obtain the encoding completion signal of the last power-on package, and determine the number of power-on packages based on the encoding completion signal of the last power-on package.

[0131] Since each power pack is address-encoded after being electrically connected to the parallel system, when the master pack communicates with the last power pack, the total number of power packs can be determined based on the number of address codes, and then the system enters the working state.

[0132] Example 3

[0133] Figure 5 This is a flowchart of a parallel operation method for an energy storage battery pack provided in Embodiment 3 of the present invention. This parallel operation method is used in the energy storage battery pack parallel operation system described in any embodiment of the present invention. The parallel operation method can be implemented in hardware and / or software. It can be configured in a power supply pack, which can be a power supply pack already electrically connected to the parallel operation system. Figure 5 As shown, the parallel operation method for the energy storage battery pack includes:

[0134] S210, Based on the first enable code provided by the power-on package electrically connected to the parallel system via the connection component, issue an encoding request signal.

[0135] When an additional power pack is needed, the new power pack is electrically connected to the parallel system and provides a first enable code. At this time, the power pack connected to the power pack will receive the first enable code and then issue a code request signal.

[0136] S220. Obtain the encoding permission signal issued by the main packet based on the encoding request signal.

[0137] The method for obtaining the encoding permission signal can be through communication, specifically CAN communication.

[0138] S230. Based on the encoding enable signal, a second enable code is issued so that the power-on package electrically connected to the parallel system completes address encoding based on the second enable code and informs the master package that the encoding is complete.

[0139] When a coding enable signal is received, a second enable code is issued. The power pack receiving the second enable code then completes its address coding. This completes the addition of the power pack without shutting down the parallel system. Therefore, even when adding a power pack while the parallel system is operating normally, the entire system can be upgraded without a shutdown, solving the problem of portable energy storage battery packs not requiring user downtime and allowing for flexible system capacity increases while meeting user needs.

[0140] In an optional embodiment of the present invention, the parallel operation method for the energy storage battery pack further includes:

[0141] When it is the last power-on package, a coded increment signal is issued based on the first enable code provided by the power-on package electrically connected to the parallel system.

[0142] Obtain the encoded enable signal issued by the main packet based on the encoded add signal.

[0143] The "encode addition signal" refers to a signal indicating that the master pack needs to add encoding. Based on the encoding addition signal, the master pack can issue an encoding enable signal. When the power-up pack receives the encoding enable signal, it can perform address encoding on the added power-up pack. That is, the last power-up pack will issue a second enable code to the added power-up pack, which can then perform address encoding through the second enable code. Therefore, even when adding a power-up pack during normal operation of the parallel system, there is no need for a complete system shutdown. This solves the problem of portable energy storage battery packs not requiring user shutdown during use, meeting user needs while flexibly increasing system capacity.

[0144] In an optional embodiment of the present invention, the parallel operation method for the energy storage battery pack further includes:

[0145] If the first enable code is not received within the preset time, it determines that it is the last power-on packet and informs the master packet that the encoding is complete.

[0146] In a parallel system under normal operation, the number of power packs is typically fixed. Multiple power packs are sequentially connected via a connection component. The connection time between two adjacent power packs is minimal; the preset time is the time required for two power packs from the same batch to connect when integrated into the parallel system, which is less than the preset time. Specifically, during normal operation, each power pack receives a first enable code from the next power pack within a preset time. However, the last power pack, being the last one, does not receive the first enable code from the next power pack. Therefore, the power pack is used to determine itself as the last power pack when the first enable code is not received within the preset time, facilitating communication between the master pack and the last power pack to determine the total number of power packs.

[0147] In an optional embodiment of the present invention, the parallel operation method for the energy storage battery pack further includes:

[0148] After encoding is completed, power-on status information and parameter information are sent to the main packet.

[0149] Obtain the charging and discharging status control information issued by the master package based on the power-on package status information and the parameter information.

[0150] The charging and discharging state is controlled based on the charging and discharging state control information.

[0151] The charging and discharging status control information refers to the information used to control the charging and discharging status of the power pack. Power pack status information refers to the current operating state of the power pack, and parameter information refers to the parameters related to charging and discharging. The encoded power pack sends its status and parameter information to the master pack, which then controls the charging and discharging status of the power pack based on these information. In other words, the power pack can control its own charging and discharging status according to the charging and discharging status control information. In practical applications, the capacity, voltage, and other parameters of each power pack may differ. Directly charging and discharging all power packs uniformly would not be conducive to optimizing the overall system performance. For example, there might be a large voltage difference between two power packs; directly discharging the lower-voltage power pack together could easily damage it. By controlling the charging and discharging status of each power pack based on its actual state, the performance of the parallel system can be improved.

[0152] Example 4

[0153] Figure 6 This is a flowchart of a parallel operation method for an energy storage battery pack provided in Embodiment 4 of the present invention. This parallel operation method is used in the energy storage battery pack parallel operation system described in any embodiment of the present invention. The parallel operation method can be implemented in hardware and / or software. It can be configured in a power supply pack, which can be a newly electrically connected power supply pack to the parallel operation system, i.e., an added power supply pack. Figure 6 As shown, the parallel operation method for the energy storage battery pack includes:

[0154] S310, when electrically connected to the parallel system via the connection component, the first enable code is issued.

[0155] The first enable code can be issued through the first code line. When the power supply is connected to the parallel system, the bus will have voltage, and the first enable code can be issued.

[0156] S320: Obtain the second enable code based on the feedback of the first enable code.

[0157] The second enable code refers to the code that instructs the power-on package to perform address encoding.

[0158] S330: Based on the second enable code, complete the address encoding and notify the main packet encoding is complete.

[0159] Specifically, through the second enable code, the power-on packet can complete the address encoding and inform the main packet that the encoding is complete. The notification method can be communication.

[0160] With the above scheme, when a power pack is added, the added power pack automatically sends a first enable code. The main pack or the power pack then sends back a second enable code. The added power pack then completes the address encoding based on the second enable code and informs the main pack that the encoding is complete. During this process, the parallel system does not need to be shut down. Therefore, even when adding a power pack while the parallel system is operating normally, there is no need for a complete system shutdown. This solves the problem of portable energy storage battery packs not requiring user shutdown during use, meeting user needs while flexibly increasing system capacity.

[0161] In an optional embodiment of the present invention, the parallel operation method for the energy storage battery pack further includes:

[0162] If the first enable code is not received within the preset time, it determines that it is the last power-on packet and informs the master packet that the encoding is complete.

[0163] In a parallel system under normal operation, the number of power packs is typically fixed. Multiple power packs are sequentially connected via a connection component. The connection time between two adjacent power packs is minimal; the preset time is the time required for two power packs from the same batch to connect when integrated into the parallel system, which is less than the preset time. Specifically, during normal operation, each power pack receives a first enable code from the next power pack within a preset time. However, the last power pack, being the last one, does not receive the first enable code from the next power pack. Therefore, the power pack is used to determine itself as the last power pack when the first enable code is not received within the preset time, facilitating communication between the master pack and the last power pack to determine the total number of power packs.

[0164] In an optional embodiment of the present invention, the parallel operation method for the energy storage battery pack further includes:

[0165] After encoding is completed, power-on status information and parameter information are sent to the main packet.

[0166] Obtain the charging and discharging status control information issued by the master package based on the power-on package status information and the parameter information.

[0167] The charging and discharging status control information refers to the information used to control the charging and discharging status of the power pack. Power pack status information refers to the current operating state of the power pack, and parameter information refers to the parameters related to charging and discharging. The encoded power pack sends its status and parameter information to the master pack, which then controls the charging and discharging status of the power pack based on these information. In other words, the power pack can control its own charging and discharging status according to the charging and discharging status control information. In practical applications, the capacity, voltage, and other parameters of each power pack may differ. Directly charging and discharging all power packs uniformly would not be conducive to optimizing the overall system performance. For example, there might be a large voltage difference between two power packs; directly discharging the lower-voltage power pack together could easily damage it. By controlling the charging and discharging status of each power pack based on its actual state, the performance of the parallel system can be improved.

[0168] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0169] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A parallel operation system for an energy storage battery pack, characterized in that, Includes the main unit, power supply unit, and connection components; The number of power-on packs is multiple, and the multiple power-on packs are electrically connected sequentially through the connecting component. The first power-on pack among the multiple power-on packs is electrically connected to the main pack through the connecting component. The power-on package is used to provide a first enable code when electrically connected to the parallel system via the connection component, so that the power-on package or the master package that receives the first enable code issues an encoding request signal; The master packet is used to issue an encoding enable signal based on the encoding request signal, so that the power-on packet that receives the first enable code or the master packet issues a second enable code when it obtains the encoding enable signal, so that the power-on packet electrically connected to the parallel system completes address encoding based on the second enable code and informs the master packet that the encoding is complete; The connection component includes a busbar, a communication line, a first encoding line, and a second encoding line; The power-on package is used to provide the first enable code through the first encoding line when the bus receives the bus voltage; The power-on packet and the main packet are used to send the encoding request signal through the communication line when the first enable code is received on the first encoding line; The power-on package is used to send the second enable code through the second encoding line when the encoding enable signal is received; The power-on packet is used to complete address encoding when the second enable encoding is obtained on the second encoding line, and to inform the master packet that the encoding is complete through the communication line.

2. The energy storage battery pack parallel operation system according to claim 1, characterized in that, The power supply is also used for: If the first encoding line does not receive the first enable code within a preset time, it determines itself as the last power-on packet and informs the master packet encoding is complete through the communication line.

3. The parallel operation system of the energy storage battery pack according to claim 2, characterized in that, When the last power-on packet receives the first enable code through the first encoding line, it sends an encoding increase signal through the communication line. The main packet is also used to issue the encoded enable signal based on the encoded add signal.

4. The energy storage battery pack parallel operation system according to any one of claims 1 to 3, characterized in that, The power-on packet is used to send power-on packet status information and parameter information to the main packet after encoding is completed; The master package is used to control the charging and discharging state of the power pack based on the power pack status information and the parameter information.

5. The energy storage battery pack parallel operation system according to any one of claims 1 to 3, characterized in that, The connection assembly also includes a switch line, and the switch line is provided with a manually normally closed switch, which is used to disconnect the switch line when it is opened. The main package is used to control the power supply package, which disconnects the switch line during the charging and discharging process, to stop charging and discharging.

6. The energy storage battery pack parallel operation system according to claim 5, characterized in that, The connection component includes an input port and an output port, the main package includes at least one output port, and the power-on package includes at least one input port and at least one output port; The main package is electrically connected to the input port of the power-on package by plugging in the output port; The power-on pack connects to the parallel system by interlocking its output port with the input port of the next power-on pack. Both the input port and the output port include the switch line; The input port is used to electrically connect the switch line when it is plugged into the output port, and to disconnect the switch line when it is pulled out. The normally closed manual switch is used to disconnect the switch line when a pressing operation is performed.

7. The energy storage battery pack parallel operation system according to claim 6, characterized in that, The manual normally closed switch includes a locking part, an unlocking part, and a switching part; The locking part is used to lock the input port and the output port during insertion so that the input port and the output port are fixed relative to each other, and to unlock the input port and the output port so that the input port and the output port can be pulled out relative to each other; The unlocking part is connected to the locking part, and is used to lock and unlock the locking part; The switch part is connected to the unlocking part. When the unlocking part receives a pressing operation, it can cause the switch part to disconnect the switch line and drive the locking part to unlock. The moment when the switch part disconnects the switch line is before the moment when the locking part unlocks.

8. A method for parallel operation of an energy storage battery pack, characterized in that, For the parallel operation system of the energy storage battery pack according to any one of claims 1-7, the parallel operation method of the energy storage battery pack includes: A coding request signal is issued based on the first enable code provided by the power-on package, which is electrically connected to the parallel system via the connection component; Based on the encoding request signal, an encoding enable signal is issued, so that the power-on package that receives the first enable code issues a second enable code when it obtains the encoding enable signal or issues a second enable code based on the encoding enable signal, so that the power-on package electrically connected to the parallel system completes address encoding based on the second enable code; Obtain the encoding completion signal sent when the power-on package completes address encoding.

9. A method for parallel operation of an energy storage battery pack, characterized in that, For the parallel operation system of the energy storage battery pack according to any one of claims 1-7, the parallel operation method of the energy storage battery pack includes: A coding request signal is issued based on the first enable code provided by the power-on package, which is electrically connected to the parallel system via the connection component; Obtain the encoding permission signal issued by the main packet based on the encoding request signal; Based on the encoded enable signal, a second enable code is issued so that the power-on package electrically connected to the parallel system completes address encoding based on the second enable code and informs the master package that the encoding is complete.

10. A method for parallel operation of an energy storage battery pack, characterized in that, For the parallel operation system of the energy storage battery pack according to any one of claims 1-7, the parallel operation method of the energy storage battery pack includes: The first enable code is issued when the connection component is electrically connected to the parallel system; Obtain the second enable code based on the feedback from the first enable code; The address encoding is completed based on the second enable code, and the main packet encoding is then notified that it is complete.

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