Industrial and commercial energy storage battery cluster device

Abstract

The utility model relates to battery assembly field discloses a kind of industrial and commercial energy storage battery cluster devices, including at least one battery cluster and at least one high voltage box, at least one battery pack is included in battery cluster, at least one battery pack and at least one relay connection terminal are included in battery pack, at least one old cell is included in battery pack;Battery cluster is connected with high voltage box by DC circuit breaker;Wherein, every old cell in battery pack is connected in series-parallel and leads out at least one group of positive and negative electrode battery line, every group of old cell in battery pack is connected in series-parallel and leads out at least one group of information acquisition line;Positive and negative electrode battery line led out by every old cell in battery pack is connected with wiring terminal and forms common negative pole and common positive pole;Information acquisition line led out by every group of old cell in battery pack is connected with signal line wiring terminal.The utility model can solve the problem that wiring mode in battery cluster in prior art is difficult to correct, and troubleshooting is inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of battery assembly, specifically to an industrial and commercial energy storage battery cluster device. Background Technology

[0002] With the rapid development of the new energy industry, the widespread application of battery technology has led to a dramatic increase in the use of battery packs in various projects. During this process, with technological advancements and equipment upgrades, projects are increasingly facing replacement or abandonment due to substandard battery pack performance or localized defects. However, among these replaced or abandoned battery packs, there are often a large number of older batteries with intact individual cells, whose capacity retention rate can generally reach over 80%, still possessing significant usability.

[0003] A battery cluster refers to a mid-level energy storage unit composed of multiple battery modules (or cells) connected in series, parallel, or a hybrid configuration. It is typically equipped with a battery management system (BMS) for unified monitoring and management. Commercial and industrial energy storage, on the other hand, is an energy storage system designed for industrial and commercial sectors. By storing electricity and releasing it when needed, it helps businesses optimize their electricity consumption. A typical commercial and industrial energy storage system has an energy storage capacity of approximately 400 kWh.

[0004] Currently, the traditional "in-pack wiring" layout is commonly used in the internal wiring of commercial and industrial energy storage battery packs. The so-called "in-pack wiring" means that the wire connections between cells are all completed inside the battery pack. However, when a large number of old cells are combined to form a battery pack, this wiring method has the following problems: (1) Low error correction efficiency: Since the lines are connected in a continuous manner, once an error occurs during the wiring process, the staff must start from the source (i.e., the starting end) to check and correct it one by one. This error correction process is not only time-consuming and laborious, but also particularly prominent when installing battery packs composed of large-scale old cells, which seriously affects the overall installation efficiency. (2) Complex and time-consuming fault diagnosis: Since the wire connections between cells are all completed inside the battery pack, the line layout is complex. When a single cell in the battery pack fails, due to the lack of convenient detection nodes and clear line settings, the staff can only determine the location of the faulty cell by disassembling the entire battery pack and checking the internal cells one by one. This fault diagnosis method is not only cumbersome to operate, but also easily causes potential damage to other components of the battery pack. In addition, the investigation process takes a long time, which causes the energy storage device to be unable to operate normally for a long time, resulting in significant economic losses for industrial and commercial users. (3) Safety hazards exist: Although old cells have the value of reuse, due to their potential safety hazards, their traditional wiring method limits the ability to monitor the status of individual cells in real time, making it impossible to detect potential safety hazards in a timely manner, thereby increasing the risk of system operation. Utility Model Content

[0005] The present invention aims to provide an industrial and commercial energy storage battery cluster device to solve the problems of difficulty in correcting wiring errors and inconvenience in troubleshooting in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an industrial and commercial energy storage battery cluster device, comprising at least one battery cluster and at least one high-voltage box, wherein the battery cluster includes at least one battery pack, the battery pack includes at least one battery module and at least one relay connection terminal, and the battery module includes at least one cell group; the battery cluster is connected to the high-voltage box via a DC circuit breaker, and the DC circuit breaker is used to control the electrical connection between the battery cluster and the high-voltage box;

[0007] In this battery pack, each old cell is connected in series and parallel and leads out at least one set of positive and negative battery lines, and each set of old cells in the battery pack is connected in series and parallel and leads out at least one set of information acquisition lines.

[0008] The relay connection terminal includes wiring terminals and signal line wiring terminals;

[0009] The terminal block provides at least one set of positive and negative terminal input ports and at least one set of terminal output ports; the positive and negative battery wires from each old cell in the battery pack are connected to the terminal block through the terminal output ports to form a common negative and a common positive terminal; the signal line terminal block provides at least one set of signal line input terminals and at least one set of signal line output terminals, and the information acquisition lines from each group of old cells in the battery pack are connected to the signal line terminal block through the signal line input terminals.

[0010] The principle of this solution is as follows: In practical applications, the industrial and commercial energy storage battery cluster device includes at least one battery cluster and at least one high-voltage box. The battery cluster is connected to the high-voltage box via a DC circuit breaker to form a power supply circuit. Each battery cluster includes at least one battery pack, which in turn includes at least one battery module and at least one relay connection terminal. Each battery module includes at least one old battery cell. The relay connection terminal includes wiring terminals and signal line wiring terminals. Specifically, the positive battery line from each old battery cell in the battery pack is connected to the wiring terminal through the output port to form a common negative terminal, and the negative battery line from each old battery cell in the battery pack is connected to the wiring terminal through the output port to form a common positive terminal. The signal line wiring terminal provides at least one set of signal line input terminals and at least one set of signal line output terminals. The information acquisition line from each set of old battery cells in the battery pack is connected to the signal line wiring terminal through the signal line input terminal.

[0011] Advantages of this solution: (1) This solution uses terminal blocks and signal line terminal blocks for segmented wiring. Compared with the traditional method of integrated wiring inside the battery pack, this solution uses external wiring of the battery pack, which makes the wiring clearer and less prone to miswiring. At the same time, the larger operating space can avoid wiring errors caused by messy lines.

[0012] In this solution, the old cells inside the battery pack are made of the same material and are connected in parallel. Therefore, collecting information from one cell can reflect the status of the entire battery pack.

[0013] This solution uses signal line terminals, allowing data acquisition to be precise down to a single battery cell, thus making the acquired data more reliable. Furthermore, it minimizes the impact on device operation when replacing individual battery cells.

[0014] This solution allows connection to each old cell in the smallest battery unit via signal line terminals and wiring terminals, and enables convenient data detection of each cell at the connection terminals when needed.

[0015] DC circuit breakers are used for manual or remote tripping to completely disconnect the electrical connection between the battery pack and the high-voltage box, preventing short-circuit current from damaging the battery pack or causing thermal runaway.

[0016] In summary, this solution overcomes the conflict between "resource recycling and operational safety." By combining old battery cells into battery clusters and rationally configuring wiring terminals, signal line terminals, and DC circuit breaker components, it achieves monitoring of each individual cell. This not only improves the utilization rate of old battery cells, fully utilizing their remaining capacity, but also enhances the safety and controllability of the device through electrical connection design. Furthermore, this solution simplifies the wiring layout, effectively reducing wire crossings and redundant connections, lowering the risk of short circuits or even fires caused by localized overheating, thereby improving the safety and stability of the device.

[0017] Preferably, as an improvement, the wiring terminal has a "one-in-nine-out" structure, and the signal line wiring terminal has a "nineteen-in-nineteen-out" structure.

[0018] Beneficial effects: The "one-in-nine-out" terminal block simplifies circuit wiring, reduces the number of input terminals, makes the structure clear, reduces wiring complexity, thereby reducing the probability of wiring errors and facilitating installation and maintenance; the "nineteen-in-nineteen-out" signal line terminal block ensures that the input and output channels correspond one-to-one, thus ensuring signal integrity.

[0019] Preferably, as an improvement, the information acquisition line is led out through the signal line output terminal and connected to the BMU unit; the BMU unit is used to use information from old cells in the battery pack.

[0020] Beneficial effects: The information acquisition line of the old cells in the battery pack is connected to the BMU unit through the signal line terminal; it can collect and analyze the operating information of the old cells in the battery pack in real time, which helps to discover potential risks of old cells in a timely manner, ensure that all old cells are in the best working condition, and extend the service life of the entire battery pack.

[0021] Preferably, as an improvement, the positive and negative terminal input ports inside the battery cluster are connected in series with the positive terminal connected to the negative terminal, and the positive and negative terminal input ports at both ends are connected to a DC circuit breaker; the BMU units inside the battery cluster are connected in parallel with the positive terminal connected to the negative terminal, and the BMU units at both ends are connected to the BCU unit in the high-voltage box, wherein the BCU unit is used to monitor and manage the battery cluster.

[0022] Beneficial effects: Connecting the battery pack in series with the positive terminal connected to the negative terminal effectively increases the overall output voltage of the battery cluster, meeting the requirements of high-voltage applications. The terminals at both ends are directly connected to the DC circuit breaker, ensuring voltage distribution stability and reducing voltage fluctuations caused by poor contact or other problems. The BMU units are connected in parallel with the positive terminal connected to the negative terminal. Each BMU unit monitors the status of its corresponding battery pack or cell and is connected to the BCU unit in the high-voltage box through the first and last BMU units, allowing the BCU to centrally manage and monitor the status of the entire battery cluster. This extends the lifespan of the entire battery cluster.

[0023] Preferably, as an improvement, the battery cluster is connected in parallel to the BAU unit through the BCU unit; the BAU unit is used to manage and coordinate the battery operating status.

[0024] Beneficial effects: The BAU unit can dynamically adjust the charging and discharging behavior of each battery cluster according to real-time power demand and supply, thereby achieving the optimal power distribution strategy.

[0025] Preferably, as an improvement, the BAU unit is connected to one end of the EMS energy management device via a network communication line; the other end of the EMS energy management device is connected to the photovoltaic device via a network communication line.

[0026] Beneficial effects: The EMS energy management device can monitor the status of BAU units and photovoltaic devices in real time, collect and analyze various operating data, and coordinate photovoltaic devices and energy storage devices to ensure that excess electricity is stored during peak photovoltaic power generation and released when demand is high or photovoltaic power generation is insufficient, thereby maximizing the use of renewable energy, reducing electricity costs, and improving economic efficiency.

[0027] Preferably, as an improvement, the high-voltage box is connected to the photovoltaic device via a main circuit breaker.

[0028] Beneficial effects: The main circuit breaker is designed to quickly disconnect the circuit when abnormal conditions (such as overload, short circuit, or voltage fluctuations) are detected, preventing the fault from spreading and protecting the entire device from damage. It also allows for adjustment of the photovoltaic device's output power according to real-time demand, achieving efficient energy management and distribution.

[0029] Preferably, as an improvement, the photovoltaic device includes, from left to right, a photovoltaic panel, a photovoltaic combiner box, an MPPT controller, a PCS unit, an isolation transformer, and a load; the photovoltaic panel is connected to the MPPT controller through the photovoltaic combiner box, and then connected to the EMS energy management device; the load is connected to the PCS unit through the isolation transformer, and then connected to the EMS energy management device.

[0030] Beneficial effects: Photovoltaic panels convert solar energy into electrical energy, and photovoltaic combiner boxes collect the current from the photovoltaic panels, reducing line losses and improving the overall efficiency of the device; MPPT controllers can adjust the working status of photovoltaic panels in real time to ensure that they always work at the maximum power point, thereby maximizing energy harvesting efficiency; isolation transformers provide protection in the event of electrical faults, preventing the fault from spreading to the entire device; photovoltaic devices can provide an additional source of power, thereby reducing electricity costs.

[0031] The beneficial effects of this scheme are: (1) Multiple battery clusters are centrally monitored and managed through the BCU unit and BAU unit, which realizes fault isolation and redundancy protection and improves the overall reliability of the device.

[0032] (2) The design of the interrupt connection terminal and BMU unit adopts the "outer wiring" method and forms segmented wiring, which simplifies the wiring process of the entire device, makes the wiring clearer, and makes it less likely to make mistakes. At the same time, the operating space is larger, which can avoid wiring errors caused by messy lines. Attached Figure Description

[0033] Figure 1 A connection diagram of an industrial and commercial energy storage battery cluster device provided in this embodiment of the present invention. Figure 1 .

[0034] Figure 2 A connection diagram of an industrial and commercial energy storage battery cluster device provided in this embodiment of the present invention. Figure 2 .

[0035] Figure 3 This is a schematic diagram of the structure of a BAU unit in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the high-voltage box in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of the wiring terminals in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present utility model.

[0038] Figure 6 This is a schematic diagram of the battery pack structure in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the signal line terminal block in an industrial and commercial energy storage battery cluster device provided in this embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram of the structure of a BMU unit in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of the connection of the battery pack in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present utility model.

[0042] Figure 10 A schematic diagram of the connection of the battery cluster in an industrial and commercial energy storage battery cluster device provided in this embodiment of the present invention. Figure 1 .

[0043] Figure 11 A schematic diagram of the connection of the battery cluster in an industrial and commercial energy storage battery cluster device provided in this embodiment of the present invention. Figure 2 .

[0044] Figure 12 This is a schematic diagram illustrating the connection between the battery cluster and the high-voltage box in an industrial and commercial energy storage battery cluster device provided by an embodiment of the present invention. Figure 1 .

[0045] Figure 13 This is a schematic diagram illustrating the connection between the battery cluster and the high-voltage box in an industrial and commercial energy storage battery cluster device provided by an embodiment of the present invention. Figure 2 .

[0046] Figure 14 This is a schematic diagram showing the connection between the high-voltage box and the BAU unit in an industrial and commercial energy storage battery cluster device provided in an embodiment of this utility model.

[0047] Figure 15 A connection diagram of a photovoltaic device in an industrial and commercial energy storage battery cluster device provided as an embodiment of this utility model. Figure 1 .

[0048] Figure 16 A connection diagram of a photovoltaic device in an industrial and commercial energy storage battery cluster device provided as an embodiment of this utility model. Figure 2 .

[0049] Figure 17 This is a schematic diagram of the MPPT controller in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0050] Figure 18 This is a schematic diagram of the EMS energy management device in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0051] Figure 19 This is a schematic diagram of the PCS unit in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0052] Figure 20 This is a schematic diagram of the structure of the isolation transformer in an industrial and commercial energy storage battery cluster device provided in an embodiment of the present invention.

[0053] Figure 21 This is a schematic diagram of the load structure in an industrial and commercial energy storage battery cluster device provided as an embodiment of the present invention. Detailed Implementation

[0054] The following detailed description illustrates the specific implementation method:

[0055] The reference numerals in the accompanying drawings include: first battery cluster 1, terminal block 11, positive terminal input port 111, negative terminal input port 112, terminal output port 113, battery pack 12, positive battery pack inlet 121, negative battery pack inlet 122, battery pack outlet 123, signal line terminal block 13, signal line inlet 131, signal line outlet 132, BMU unit 14, first high-voltage box 2, BAU unit 3, BCU unit 4, DC circuit breaker 5, second battery cluster 6, second high-voltage box 7, photovoltaic panel 8, photovoltaic combiner box 9, MPPT controller 10, main circuit breaker 15, PCS unit 16, isolation transformer 17, load 18, EMS energy management device 19.

[0056] Example 1:

[0057] The implementation examples are basically as follows Figure 1 , Figure 2The diagram shows an industrial and commercial energy storage battery cluster device, comprising battery clusters for providing power, a high-voltage box for electrical isolation and protection, and a BAU unit 3 (also known as a battery stack management unit) for managing and coordinating the battery's operating status. Nine battery cells are connected in parallel to form one battery pack, and thirteen battery packs are connected in series to form one battery cluster, which is connected to the high-voltage box. Specifically, the first battery cluster 1 is connected to the first high-voltage box 2, the second battery cluster 6 is connected to the second high-voltage box 7, and finally, the two high-voltage boxes (i.e., the first high-voltage box 2 and the second high-voltage box 7) are connected in parallel to the BAU unit 3, thus forming the industrial and commercial energy storage battery cluster device.

[0058] like Figure 2 As shown, a DC circuit breaker 5 connects the first battery cluster 1 and the first high-voltage box 2. The DC circuit breaker 5 is used for manual or remote tripping to completely disconnect the electrical connection between the battery cluster and the high-voltage box, preventing short-circuit current from damaging the battery cluster or causing thermal runaway. The first high-voltage box 2 is equipped with a BCU unit 4 (also known as a "battery cluster management unit"), which is used for fine-grained monitoring and management of the battery cluster to ensure its safe and efficient operation.

[0059] The first battery cluster 1 includes 13 battery packs, one of which, from left to right, includes a terminal block 11, a battery pack 12, a signal line terminal block 13, and a BMU unit 14. The BMU unit 14 (also known as the "battery pack management unit") is the core sub-device for fine-grained management of a single battery pack 12, and its functions include safety monitoring, status assessment, equalization control, and communication interaction.

[0060] Specifically,

[0061] like Figure 3 As shown, the top of BAU unit 3 is equipped with a network communication port, and the bottom of BAU unit 3 is symmetrically arranged with an internal CAN_H port, an internal CAN_L port, a P+ port, a P- port, and an ADR- port. From left to right on its left side, these are referred to as the first internal CAN_H port, the first internal CAN_L port, the first P+ port, the first P- port, and the first ADR- port; from left to right on its right side, these are referred to as the second ADR- port, the second P- port, the second P+ port, the second internal CAN_L port, and the second internal CAN_H port.

[0062] like Figure 4 As shown, the top of the first high-voltage box 2 is arranged with a B-port (also known as the "first B-port") and a B+ port (also known as the "first B+ port") from left to right, and the bottom of the first high-voltage box 2 is arranged with a B+ port (also known as the "second B+ port") and a B-port (also known as the "second B-port") from left to right.

[0063] The bottom of BCU unit 4 is equipped with output terminals, which, from left to right, include the address output _DO port, the internal CAN_H port (also known as the "third internal CAN_H port"), the internal CAN_L port (also known as the "third internal CAN_L port"), the P- port (also known as the "third P- port"), and the P+ port (also known as the "third P+ port"). The right side of BCU unit 4 is equipped with input terminals, which, from top to bottom, include the CAN_L port (also known as the "fourth CAN_L port"), the CAN_H port (also known as the "fourth CAN_H port"), the P+ port (also known as the "fourth P+ port"), the P- port (also known as the "fourth P- port"), and the ADR- port (also known as the "fourth ADR- port").

[0064] like Figure 5 As shown, the terminal block 11 used in this embodiment has a "one-in, nine-out" structure, and its model is XK2-70 / 6*12. The top of the terminal block 11 has a positive terminal input port 111, the bottom has a negative terminal input port 112, and the right side has a terminal output port 113. Specifically, the terminal output ports 113 are, from top to bottom, the first terminal output port, the second terminal output port, the third terminal output port, the fourth terminal output port, the fifth terminal output port, the sixth terminal output port, the seventh terminal output port, the eighth terminal output port, and the ninth terminal output port. In this embodiment, as... Figure 5 As shown, it is composed of two "one-in-nine-out" terminal blocks 11, with the upper one being the first terminal block and the lower one being the second terminal block.

[0065] The battery pack 12 includes at least one cell group, and each cell group includes at least one old cell. In this embodiment, a battery pack 12 consists of 9 cell groups connected in parallel, wherein each cell group consists of 36 old cells in a "18 series 2 parallel" configuration. The battery pack 12 contains 9 sets of positive electrode lines, 9 sets of negative electrode lines, and 9 sets of information acquisition lines.

[0066] like Figure 6As shown, the battery pack 12 is equipped with 18 battery pack inlets and 19 battery pack outlets 123. The battery pack inlets are located on the left side of the battery pack 12, and from top to bottom, they are divided into 9 positive battery pack inlets 121 and 9 negative battery pack inlets 122. Taking the positive battery pack inlets 121 as an example, from top to bottom, they are the first positive battery pack inlet, the second positive battery pack inlet, the third positive battery pack inlet, the fourth positive battery pack inlet, the fifth positive battery pack inlet, the sixth positive battery pack inlet, the seventh positive battery pack inlet, the eighth positive battery pack inlet, and the ninth positive battery pack inlet. Similarly, the negative battery pack inlets 122 are also from top to bottom the first negative battery pack inlet… and the ninth negative battery pack inlet. The battery pack leads 123 are located on the right side of the battery pack 12. From top to bottom, the battery pack leads 123 are the first battery pack lead, the second battery pack lead, the third battery pack lead, and so on, up to the nineteenth battery pack lead. That is, one battery pack 12 is equipped with 9 positive battery pack leads 121, 9 negative battery pack leads 122, and 19 battery pack leads 123.

[0067] like Figure 7 As shown, the signal line terminal block 13 has a "nineteen inputs and nineteen outputs" structure, and the terminal head used in the signal line terminal block 13 is model XH2.54.

[0068] It includes 19 signal line input terminals 131 and 19 signal line output terminals 132. Specifically, the signal line input terminals 131 are located to the left of the signal line terminal block 13, and from top to bottom, they are the first signal line input terminal, the second signal line input terminal, the third signal line input terminal, ... and the nineteenth signal line input terminal. The signal line output terminals 132 are located to the right of the signal line terminal block 13, and from top to bottom, they are the first signal line output terminal, the second signal line output terminal, the third signal line output terminal, ... and the nineteenth signal line output terminal.

[0069] like Figure 8As shown, BMU unit 14 includes 19 BMU input terminals and 10 BMU output terminals. Its BMU input terminals are located on the left side of BMU unit 14, and from top to bottom, they include the first BMU output terminal, the second BMU output terminal, the third BMU output terminal, ..., and the nineteenth BMU output terminal. The BMU output terminals are located on the right side of BMU unit 14, and from top to bottom, they include the ADR-port (also known as the "fifth ADR-port"), the CAN_L port (also known as the "fifth CAN_L port"), the CAN_H port (also known as the "fifth CAN_H port"), the P-port (also known as the "fifth P-port"), the P+ port (also known as the "fifth P+ port"), the P+ port (also known as the "sixth P+ port"), the P-port (also known as the "sixth P-port"), the CAN_H port (also known as the "sixth CAN_H port"), the CAN_L port (also known as the "sixth CAN_L port"), and the ADR-port (also known as the "sixth ADR-port").

[0070] The specific connection process is as follows:

[0071] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown,

[0072] Step 1: Connect the positive and negative battery wires of each old cell in battery pack 12 to the "one-in-nine-out" terminal 11 to form a common negative and common positive terminal. One battery pack 12 contains 9 cell groups, each consisting of 36 old cells connected by nickel strips to form 18 series-2 parallel (18S2P) terminals. Each cell group only has one set of positive and negative battery wires. When forming the common negative and common positive terminals, each old cell is divided into 9 sets of positive battery wires and 9 sets of negative battery wires, based on the cell group.

[0073] Specifically, the battery pack 12 has two terminals 11 connected to its left side. From top to bottom, these terminals are designated as the first terminal and the second terminal. Each cell group has only one set of positive and negative battery lines. The positive battery lines of each cell group in the battery pack 12 converge at the first terminal 11 to form a common negative terminal, and the negative battery lines of each cell group in the battery pack 12 converge at the second terminal 11 to form a common positive terminal. Taking the connection between the battery pack 12 and the first terminal to form a common negative terminal as an example, the positive battery line from the positive battery pack inlet 121 connects to the first terminal. Specifically, the positive battery wire of the first group of battery cells is connected to the output port of the first terminal block through the inlet of the first positive battery pack; the positive battery wire of the second group of battery cells is connected to the output port of the second terminal block through the inlet of the second positive battery pack; the positive battery wire of the third group of battery cells is connected to the output port of the third terminal block through the inlet of the third positive battery pack; the positive battery wire of the fourth group of battery cells is connected to the output port of the fourth terminal block through the inlet of the fourth positive battery pack; the positive battery wire of the fifth group of battery cells is connected to the output port of the fifth terminal block through the inlet of the fifth positive battery pack; the positive battery wire of the sixth group of battery cells is connected to the output port of the sixth terminal block through the inlet of the sixth positive battery pack; the positive battery wire of the seventh group of battery cells is connected to the output port of the seventh terminal block through the inlet of the seventh positive battery pack; the positive battery wire of the eighth group of battery cells is connected to the output port of the eighth terminal block through the inlet of the eighth positive battery pack; and the positive battery wire of the ninth group of battery cells is connected to the output port of the ninth terminal block through the inlet of the ninth positive battery pack. This allows the positive battery wires of each old cell in the battery pack 12 to be gathered at the first terminal to form a common negative electrode.

[0074] Similarly, the connection method of the battery pack 12 and the second connection terminal forming a common positive terminal is the same as described above. This solution uses segmented wiring, with each battery pack 12 equipped with an independent terminal 11 for control. Furthermore, the wiring of the older cells in each battery pack 12 is done externally. Compared to the traditional integrated and continuous wiring method within a battery pack, this solution offers clearer wiring, more operating space, and avoids wiring errors caused by messy wiring.

[0075] Step 2: Connect the information acquisition lines of one group of cells in the battery pack 12 to the "19 inputs and 19 outputs" signal terminal 13, and then connect it to the BMU unit 14. There are 19 information acquisition lines in one group of cells.

[0076] Specifically, the signal line terminal 13 is located between the battery pack 12 and the BMU unit 14. First, the nineteen information acquisition lines of one group of cells in the battery pack 12 are connected to the nineteen input terminals of the signal line terminal 13 via the nineteen battery pack lead-out terminals 123. Then, the nineteen signal line output terminals 132 of the signal line terminal 13 are led out and connected to the nineteen BMU input terminals of the BMU unit 14. In this embodiment, the cells inside the battery pack 12 are made of the same material and connected in parallel; therefore, acquiring information from one cell can reflect the state of the entire battery pack 12. Simultaneously, since the smallest BMU unit 14 for data acquisition can be accurate to a single cell, the acquired data is more reliable.

[0077] Step 3: After a group of battery packs (i.e., terminal 11, battery pack 12, signal line terminal 13 and BMU unit 14 form a group of battery packs) are connected, the 13 groups of battery packs are connected in series to form the first battery cluster 1.

[0078] like Figure 2 As shown, the connection method of each battery pack is the same. After the 129 positive and negative battery lines of each battery pack are connected to the terminal 11 and the 129 information acquisition lines of each battery pack are connected to the BMU unit 14, the adjacent terminal 11s are connected in series and the adjacent BMU units 14 are connected in parallel to form a battery cluster.

[0079] Adjacent terminals 11 are connected in series: specifically, as follows Figure 5 , Figure 10 As shown, the positive and negative terminals of adjacent terminals 11 are connected in series sequentially. Specifically, the negative terminal (-) of terminal 11 in the first battery pack is connected to the positive terminal (+) of terminal 11 in the second battery pack, the negative terminal (-) of terminal 11 in the second battery pack is connected to the positive terminal (+) of terminal 11 in the third battery pack, and so on, until the 12th and 13th battery packs are connected in series.

[0080] Simultaneously, BMU unit 14 is connected in parallel to define a unique address for each battery pack 12. Specifically, as follows... Figure 11As shown, the BMU output terminal of BMU unit 14 in the first battery pack is connected to the BMU output terminal of BMU unit 14 in the second battery pack. Specifically, the sixth P+ port of the first BMU output terminal is connected to the fifth P+ port of the second BMU output terminal via the P+ power line; the sixth P- port of the first BMU output terminal is connected to the fifth P- port of the second BMU output terminal via the P- power line; the sixth CAN_H port of the first BMU output terminal is connected to the fifth CAN_H port of the second BMU output terminal via the CAN communication line; the sixth CAN_L port of the first BMU output terminal is connected to the fifth CAN_L port of the second BMU output terminal via the CAN communication line; and the sixth ADR+ port of the first BMU output terminal is connected to the fifth ADR- port of the second BMU output terminal via the ADR-BMU slave board communication line. The sixth P+ port of the second BMU output is connected to the fifth P+ port of the third BMU output via the P+ power line; the sixth P- port of the second BMU output is connected to the fifth P- port of the third BMU output via the P- power line; the sixth CAN_H port of the second BMU output is connected to the fifth CAN_H port of the third BMU output via the CAN communication line; the sixth CAN_L port of the second BMU output is connected to the fifth CAN_L port of the third BMU output via the CAN communication line; the sixth ADR+ port of the second BMU output is connected to the fifth ADR- port of the third BMU output via the ADR-BMU slave board communication line; and so on, until the 12th and 13th groups are connected in series.

[0081] like Figure 4 , Figure 12 As shown, finally, the positive (+) terminal of terminal 11 in the first battery pack and the negative (-) terminal of terminal 11 in the thirteenth battery pack are connected to the two poles of the DC circuit breaker 5, and then connected to the second B+ port and the second B- port in the high-voltage box through the DC circuit breaker 5. Figure 13As shown, in the first group, the fifth P+ port of BMU unit 14 is connected to the third P+ port of BCU unit 4 via the P+ power line; in the second group, the fifth P- port of BMU unit 14 is connected to the third P- port of BCU unit 4 via the P- power line; in the first group, the fifth CAN_L port of BMU unit 14 is connected to the third internal CAN_L port of BCU unit 4 via the CAN communication line; in the first group, the fifth CAN_H port of BMU unit 14 is connected to the third internal CAN_H port of BCU unit 4 via the CAN communication line; and in the first group, the fifth ADR- port of BMU unit 14 is connected to the address output _DO port of BCU unit 4 via the ADR-BMU slave board communication line, thus forming a complete power supply loop and obtaining a 200kWh first battery cluster 1.

[0082] Step 4: Repeat steps 1 to 3 to form the second battery cluster 6, resulting in a 200kWh second battery cluster 6.

[0083] Step 5: Connect the two battery clusters in parallel to BAU unit 3 to form a 400kWh industrial and commercial energy storage device.

[0084] like Figure 3 , Figure 4 , Figure 14 As shown, the first high-voltage box 2 and the second high-voltage box 7 are connected in parallel to the BAU unit 3. Specifically, the input terminal on the right side of the BCU unit 4 is connected to the bottom of the BAU unit 3. That is, the fourth CAN_L port in the BCU unit 4 is connected to the first internal CAN_L port in the BAU unit 3 through a CAN communication line; the fourth CAN_H port in the BCU unit 4 is connected to the first internal CAN_H port in the BAU unit 3 through a CAN communication line; the fourth P+ port in the BCU unit 4 is connected to the first P+ port in the BAU unit 3 through a P+ power line; the fourth P- port in the BCU unit 4 is connected to the first P- port in the BAU unit 3 through a P- power line; and the fourth ADR- port in the BCU unit 4 is connected to the first ADR- port in the BAU unit 3 through an ADR-BMU slave board communication line, thereby realizing the connection between the BCU unit 4 and the BAU unit 3 in the first high-voltage box 2.

[0085] Similarly, repeat the above operation to connect the BCU unit and BAU unit 3 in the second high-voltage box 7. This allows the first high-voltage box 2 and the second high-voltage box 7 to be connected in parallel to the BAU unit 3, thus forming a 400kWh industrial and commercial energy storage device.

[0086] This solution employs segmented wiring via terminal blocks and signal line terminal blocks. Compared to traditional integrated wiring within the battery pack, this external wiring method results in clearer wiring, reduces the risk of incorrect connections, and provides more operational space, preventing wiring errors caused by clutter. Furthermore, the signal line terminal blocks allow for precise data acquisition down to each individual old battery cell, ensuring more reliable data and enabling convenient data monitoring of each cell at the connection points when needed. Additionally, replacing individual cells minimizes disruption to system operation.

[0087] Specifically, this solution cleverly avoids the intersection and overlap of high-current paths through wiring design, and reduces wire crossings and redundant connections, thereby reducing the risk of short circuits caused by localized overheating. Simultaneously, the wiring design fully considers actual installation space limitations and future maintenance needs, employing a "flat wiring" (i.e., equal connection at both ends) + zoned layout (i.e., terminal blocks, signal line terminal blocks, etc.) approach, which not only saves overall volume but also improves space utilization. Furthermore, the overall layout of this solution overcomes the contradiction between "resource recycling and operational safety." While using old battery cells to form battery clusters, it considers issues such as localized heat dissipation, high energy loss, and poor safety of old battery cell clusters. Through the rational configuration of terminal blocks, signal line terminal blocks, and DC circuit breaker components, it can acquire key parameters such as voltage and temperature of each old battery cell in real time, and quickly cut off the power to the faulty unit in the event of an anomaly, preventing the spread of thermal runaway.

[0088] Example 2:

[0089] The difference between this embodiment and Implementation 1 is as follows: Step 6: Connect the BAU unit 3, the first high-voltage box 2 and the second high-voltage box 7 to the EMS energy management device 19, and arrange the photovoltaic panels 8 and MPPT controller 10 reasonably according to the power consumption to form a 400kWh off-grid industrial and commercial energy storage device.

[0090] Specifically, such as Figure 15 , Figure 16 As shown, BAU unit 3 is connected to EMS energy management device 19. First high voltage box 2 and second high voltage box 7 are connected to main circuit breaker 15 through first B- port and first B+ port on the top. Photovoltaic panel 8 and photovoltaic combiner box 9 are connected to MPPT controller 10 and then to EMS energy management device 19. Isolation transformer 17 and load 18 are connected to PCS unit 16 and then to EMS energy management device 19.

[0091] Specifically, such as Figure 17As shown, the MPPT controller 10 has four DC_TN+ ports and DC_TN- ports arranged from top to bottom on its left side, a network communication port configured on its top, and DC_OUT+ ports and DC_OUT- ports arranged from top to bottom on its right side.

[0092] like Figure 18 As shown, the bottom of the EMS energy management device 19 has three network communication ports, which are the first network communication port, the second network communication port and the third network communication port from left to right.

[0093] like Figure 19 As shown, the left side of PCS unit 16 is arranged from top to bottom with a network communication port, a DC_INPUT+ port, and a DC_INPUT- port; the right side is arranged from top to bottom with a port A, a port B, a port C, a port N, and a port PE.

[0094] like Figure 20 As shown, the isolation transformer 17 has ports A, B and C arranged from top to bottom on its left side; and ports A, B, C, N and PE arranged from top to bottom on its right side.

[0095] like Figure 21 As shown, ports A, B, C and N are arranged from top to bottom on the left side of load 18.

[0096] Its connection method is as follows:

[0097] Step 1: Connect the two input terminals of photovoltaic panel 8 to photovoltaic combiner box 9 via wires;

[0098] Step Two: As Figure 17 As shown, the eight output terminals of the photovoltaic combiner box 9 are connected to the four DC_TN+ ports and four DC_TN- ports in the MPPT controller 10 through four sets of PV input lines;

[0099] Step 3: As Figure 17 , Figure 18 , Figure 19 As shown, the network communication port of MPPT controller 10 is connected to the first network communication port in EMS energy management device 19 via a network communication line; the DC_OUT+ port and DC_OUT- port of MPPT controller 10 are connected to the DC_INPUT+ port and DC_INPUT- port in PCS unit 16 via wires, respectively.

[0100] Step Four: As Figure 18 , Figure 19 , Figure 20As shown, the network communication port in PCS unit 16 is connected to the third network communication port in EMS energy management device 19 via a network communication line; the A port, B port, and C port in PCS unit 16 are connected to the A port, B port, and C port on the left side of isolation transformer 17 via A phase line, B phase line, and C phase line, respectively; the PE port in PCS unit 16 is grounded via a ground wire.

[0101] Step 5: As Figure 20 , Figure 21 As shown, the A, B, C and N ports on the right side of the isolation transformer 17 are connected to the A, B, C and N ports on the left side of the load 18 through the A phase line, B phase line, C phase line and conductor, respectively. The PE port in the isolation transformer 17 is grounded through the ground wire.

[0102] Step 5: The network communication port on the top of BAU unit 3 is connected to the second network communication port in EMS energy management device 19 via a network communication line. The first high-voltage box 2 and the second high-voltage box 7 are connected to the main circuit breaker 15 via the first B- port and the first B+ port on the top and connected to the wire between MPPT controller 10 and PCS unit 16, thereby forming a complete power supply circuit and obtaining a 400kWh off-grid industrial and commercial energy storage device.

[0103] In this solution, the EMS energy management device 19 can monitor and control the operation of each battery pack 12 at any time. Simultaneously, through the rational arrangement of components such as the photovoltaic panels 8 and the MPPT controller 10, this solution enables photovoltaic power to supply energy storage and the load 18, thereby reducing resource consumption. When there is no photovoltaic power or insufficient photovoltaic power generation, the system automatically switches to energy storage power supply mode, with the battery pack continuously supplying energy to the load 18, ensuring continuous power supply.

[0104] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A commercial and industrial energy storage battery cluster device, characterized in that: It includes at least one battery cluster and at least one high-voltage box. The battery cluster includes at least one battery pack, the battery pack includes at least one battery module and at least one relay connection terminal, and the battery module includes at least one old battery cell. The battery cluster is connected to the high-voltage box via a DC circuit breaker, which is used to control the electrical connection between the battery cluster and the high-voltage box. In this battery pack, each old cell is connected in series and parallel and leads out at least one set of positive and negative battery lines, and each set of old cells in the battery pack is connected in series and parallel and leads out at least one set of information acquisition lines. The relay connection terminal includes wiring terminals and signal line wiring terminals; The terminal block provides at least one set of positive and negative terminal input ports and at least one set of terminal output ports; the positive and negative battery wires from each old cell in the battery pack are connected to the terminal block through the terminal output ports to form a common negative and a common positive terminal; the signal line terminal block provides at least one set of signal line input terminals and at least one set of signal line output terminals, and the information acquisition lines from each group of old cells in the battery pack are connected to the signal line terminal block through the signal line input terminals.

2. The industrial and commercial energy storage battery cluster device according to claim 1, characterized in that: The terminal block has a "one-in-nine-out" structure, and the signal line terminal block has a "nineteen-in-nineteen-out" structure.

3. The industrial and commercial energy storage battery cluster device according to claim 1, characterized in that: The information acquisition line is led out through the signal line output terminal and connected to the BMU unit; the BMU unit is used to use information from old cells in the battery pack.

4. The industrial and commercial energy storage battery cluster device according to claim 3, characterized in that: Inside the battery pack, the positive and negative terminal input ports are connected in series with the positive terminal connected to the negative terminal, and the positive and negative terminal input ports at both ends are connected to the DC circuit breaker; inside the battery cluster, the BMU unit signal acquisition is connected in parallel with the positive terminal connected to the negative terminal, and the BMU units at both ends are connected to the BCU unit in the high-voltage box. The BCU unit is used to monitor and manage the battery cluster.

5. The industrial and commercial energy storage battery cluster device according to claim 4, characterized in that: The battery cluster is connected in parallel to the BAU unit through the BCU unit; the BAU unit is used to manage and coordinate the battery operating status.

6. The industrial and commercial energy storage battery cluster device according to claim 5, characterized in that: The BAU unit is connected to one end of the EMS energy management device via a network communication line; the other end of the EMS energy management device is connected to the photovoltaic device via a network communication line.

7. The industrial and commercial energy storage battery cluster device according to claim 6, characterized in that: The high-voltage box is connected to the photovoltaic device via a main circuit breaker.

8. The industrial and commercial energy storage battery cluster device according to claim 6, characterized in that: The photovoltaic device includes, from left to right, a photovoltaic panel, a photovoltaic combiner box, an MPPT controller, a PCS unit, an isolation transformer, and a load. The photovoltaic panel is connected to the MPPT controller through the photovoltaic combiner box and then connected to the EMS energy management device. The load is connected to the PCS unit through the isolation transformer and then connected to the EMS energy management device.

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