Wall-mounted battery pack series capacity expansion structure

Abstract

This utility model belongs to the field of lithium-ion battery technology, specifically relating to a wall-mounted battery pack series capacity expansion structure, including a fixed bracket, at least one battery pack, an output unit, and a shorting unit. The battery pack, output unit, and shorting unit are all horizontally mounted on the fixed bracket, and are electrically connected via connectors. By adopting a modular design for the wall-mounted battery pack, the battery pack, output unit, and shorting unit are independently set up and electrically connected via connectors. Capacity expansion can be quickly achieved simply by increasing the number of battery pack connections, effectively solving the problem of insufficient capacity expansion capabilities in traditional integrated wall-mounted battery packs. The operation is simple, flexible, and efficient, well meeting users' needs for increased energy storage.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a wall-mounted battery pack series capacity expansion structure. Background Technology

[0002] With the continuous advancement of photovoltaic and energy storage battery technologies, coupled with government policy incentives in various countries, the global demand for residential photovoltaic and energy storage systems has continued to grow in recent years. As a core component of the system, the energy storage battery packs also have an increasing demand for energy storage capacity.

[0003] Currently, residential energy storage battery packs are mainly divided into two types: floor-mounted stacked and wall-mounted. Floor-mounted stacked battery packs are installed on the floor, and although the storage capacity can be adjusted by increasing or decreasing the number of stacked battery packs, they require a certain amount of floor space and are subject to risks such as water immersion. Wall-mounted battery packs are installed on the wall, which can effectively save floor space and reduce the risk of water immersion. However, most existing wall-mounted battery packs adopt an integrated structure, which has obvious limitations in terms of capacity expansion.

[0004] Specifically, existing technologies have many shortcomings: For example, patent CN220753632U discloses a wall-mounted home energy storage battery pack, which adopts an integrated design. Although the capacity can be expanded by adjusting the number of cells, the outer casing needs to be disassembled for expansion, making the operation complicated; patent CN221632784U proposes a stacked connection structure for a residential energy storage system, which adopts a floor-mounted stacking design and achieves series expansion of battery packs through hot-swappable connectors, but it occupies floor space and poses a risk of water immersion; patent CN210927169U discloses a wall-mounted energy storage power supply structure, which can achieve expansion of multiple power supplies through side female and male connectors, but it is an integrated battery pack-level expansion, which is costly.

[0005] In summary, existing wall-mounted battery packs still have room for improvement in terms of ease of capacity expansion, space utilization, and cost control, and are unable to meet users' needs for rapid, low-cost, and efficient capacity expansion. Utility Model Content

[0006] The purpose of this invention is to provide a box coating device to solve the technical problem of insufficient capacity to expand storage power and inability to achieve rapid power expansion.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a wall-mounted battery pack series capacity expansion structure, characterized in that it includes a fixed bracket, at least one battery pack, an output unit, and a shorting unit; the battery pack, output unit, and shorting unit are all horizontally mounted on the fixed bracket, and the battery pack, output unit, and shorting unit are electrically connected by connector plugging.

[0009] Preferably, the battery pack contains a first module and a second module arranged vertically. The battery pack has an input connector on the left and an output connector on the right. The left end of the first module is the overall positive terminal of the module, which is connected to the first pin of the input connector, and the right end is the overall negative terminal of the module, which is connected to the first pin of the output connector. The left end of the second module is the overall negative terminal of the module, which is connected to the second pin of the input connector, and the right end is the overall positive terminal of the module, which is connected to the second pin of the output connector.

[0010] Preferably, the battery pack also includes a sampling board and a module bracket. The sampling board is used to collect and convert the voltage and temperature data of the first module and the second module. The converted data is exchanged with the outside through the signal pins of the input connector and the output connector. The module bracket is used to fix the first module, the second module and the sampling board to the battery pack housing.

[0011] Preferably, the back of the battery pack housing is equipped with a battery pack connection and fixing mechanism, which adopts a slot form for connecting and fixing the battery pack to the fixing bracket; the battery pack also includes a battery pack cover plate for sealing and protection.

[0012] Preferably, the output unit internally includes a fuse, a DC-DC converter, a circuit breaker, a controller, an external power connector, an external communication connector, and a battery connector; the first pin of the battery connector is positive, connected to the positive terminal of the low-voltage side of the DC-DC converter via the fuse, and the second pin is negative, connected to the negative terminal of the low-voltage side of the DC-DC converter; the communication pin is connected to the controller; the high-voltage side output of the DC-DC converter is connected to the circuit breaker, and then connected to the external power connector via the circuit breaker; the controller communicates with external devices through the external communication connector.

[0013] Preferably, the output unit further includes an output unit housing and an output unit cover plate. The output unit housing is used to install internal components, and the output unit cover plate is used for sealing and protection. An output unit connection and fixing mechanism is installed on the back of the output unit. The output unit connection and fixing mechanism adopts a slot form and is used to connect and fix the output unit to the fixing bracket.

[0014] Preferably, the shorting unit is equipped with a terminal connector, which is the same as the input connector of the battery pack. Its first and second pins are shorted inside the shorting unit, and the communication pin is used for impedance matching when communication is interrupted. The terminal connector is fixed on the mounting plate of the shorting unit, and the shorting unit is sealed and protected by the housing of the shorting unit.

[0015] Preferably, the shorting unit is equipped with a shorting unit connection and fixing mechanism on the back. The shorting unit connection and fixing mechanism adopts a slot form and is used to connect and fix the shorting unit to the fixing bracket.

[0016] Preferably, the fixed bracket consists of a bracket body and a bracket end plate. The bracket body is used to guide and support the battery pack, output unit, and short-circuit unit, and the bracket end plate is used for limiting the two ends. The bracket body is provided with fixing holes for fixing the fixed bracket to the wall, and is also provided with horizontally through mounting holes for the bracket end plate, which are used to fix the bracket end plate with fixing screws.

[0017] Preferably, the support body can be extended by splicing after being positioned by the support connecting components.

[0018] The beneficial effects of this utility model are: by adopting a modular design for the wall-mounted battery pack, the battery pack, output unit, short-circuit unit and other components are set up independently and electrically connected by connectors. The capacity can be quickly expanded by simply increasing the number of battery pack connections. This effectively solves the problem of insufficient capacity expansion of traditional integrated wall-mounted battery packs. The operation is simple, flexible and efficient, and can well meet the user's needs for increased energy storage.

[0019] Meanwhile, the structure, with its wall-mounted mounting bracket, retains the advantages of wall-mounted battery packs in saving floor space and reducing the risk of water immersion. It also adapts to different expansion needs through the splicing and extension design of the bracket. Furthermore, the modular design eliminates the need for additional output units and other components compared to integrated expansion, significantly reducing expansion costs and improving overall efficiency and practicality. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 is an exploded view of the battery pack structure of this utility model;

[0022] Figure 3 is a schematic diagram of the battery pack structure of this utility model;

[0023] Figure 4 is a schematic diagram of the output unit structure of this utility model;

[0024] Figure 5 is a schematic diagram of the short-circuit unit structure of this utility model;

[0025] Figure 6 is a schematic diagram of the back connection and fixing device of this utility model;

[0026] Figure 7 is a schematic diagram of the fixed bracket structure of this utility model;

[0027] Figure 8 is a schematic diagram of the fixed bracket splicing extension structure of this utility model;

[0028] Figure 9 is a structural schematic diagram of a single battery pack of this utility model in use;

[0029] Figure 10 is a structural schematic diagram of the connection state of the newly added support body of this utility model;

[0030] Figure 11 is a structural schematic diagram of the expanded capacity state of multiple battery packs of this utility model.

[0031] The attached diagram is described below:

[0032] In the diagram: 1. Fixed bracket; 2. Battery pack; 3. Output unit; 4. Short-circuit unit; 5. First module; 6. Second module; 7. Input connector; 8. Output connector; 9. Sampling board; 10. Module bracket; 11. Battery pack housing; 12. Battery pack connection and fixing mechanism; 13. Battery pack cover plate; 14. Fuse; 15. DC-DC converter; 16. Circuit breaker; 17. Controller; 18. External power connector; 19. External communication connector; 20. Battery connector; 21. Output unit housing; 22. Output unit cover plate; 23. Output unit connection and fixing mechanism; 24. Terminal connector; 25. Short-circuit unit mounting plate; 26. Short-circuit unit housing; 27. Short-circuit unit connection and fixing mechanism; 28. Bracket body; 29. ​​Bracket end plate; 30. Fixing hole; 31. Bracket end plate mounting hole; 32. Bracket end plate fixing screw; 33. Bracket connecting component. Detailed Implementation

[0033] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0037] This patent proposes a series expansion structure for wall-mounted battery packs. It increases the battery pack voltage by increasing the number of battery pack connections and adjusts the battery pack's output voltage via a DC-DC converter within the combiner unit to meet the demands of an external inverter. This solves the problem that current mainstream wall-mounted battery packs cannot quickly expand their capacity.

[0038] Specifically, it consists of a wall-mounted bracket 1, a horizontally insertable battery pack 2, an output unit 3, and an end-connecting shorting unit 4. The battery pack, output unit, and shorting unit are electrically connected via connectors. Simply increasing the number of connections in the battery pack allows for easy expansion of the battery capacity. Figure 1 As shown.

[0039] Exploded view of the battery pack structure as follows Figure 2 As shown, battery pack 2 is an energy storage component; output unit 3 is used for the protection, voltage regulation and output of the battery pack; short-circuit unit 4 is used for the end connection of the battery pack; and fixed bracket 1 is responsible for fixing battery pack 2, output unit 3 and short-circuit unit 4 to the wall.

[0040] The battery pack consists of a battery pack 2, an output unit 3, a shorting unit 4, and a mounting bracket 1. The battery pack 2 is the energy storage component; the output unit 3 is used for the protection, voltage regulation, and output of the battery pack; the shorting unit 4 is used for the terminal connection of the battery pack; and the mounting bracket 1 is responsible for fixing the battery pack, output unit, and shorting unit to the wall.

[0041] Battery pack 2 structure as follows Figure 3As shown, the battery pack contains two battery modules arranged vertically, with the upper module 5 and the lower module 6. The left end of the first module 5 is the overall positive terminal, connected to pin 1 of the input connector 7 on the left side of the battery pack; the right end is the overall negative terminal, connected to pin 1 of the output connector 8 on the right side of the battery pack. Current flows into the first module 5 within the battery pack through pin 1 of the input connector 7 and then out of the battery pack through pin 1 of the output connector 8. The left end of the second module 6 is the overall negative terminal, connected to pin 2 of the input connector 7 on the left side of the battery pack; the right end is the overall positive terminal, connected to pin 2 of the output connector 8 on the right side of the battery pack. Current flows into the second module 6 within the battery pack through pin 2 of the output connector 8 and then out of the battery pack through pin 2 of the input connector 7. The voltage and temperature data of the first module 5 and the second module 6 are collected and format-converted by the sampling board 9 inside the pack. The converted data is then exchanged with the outside via the signal pins of the input connector 7 and the output connector 8. The module bracket 10 is used to fix the first module 5, the second module 6, and the sampling plate 9 to the battery pack housing 11. The battery pack housing 11 is equipped with a battery pack connection and fixing mechanism 12 on the back, which can connect the battery pack 2 to the fixing bracket 1. The battery pack cover plate 13 is used for sealing and protecting the battery pack.

[0042] The structure of output unit 3 is as follows Figure 4 As shown, the internal components include a fuse 14, a DC-DC converter 15, a circuit breaker 16, a controller 17, an external power connector 18, an external communication connector 19, and a battery connector 20. The battery connector 20 is the same model as the output connector 8 of the battery pack. Its first pin is positive, connected to the low-voltage positive terminal of the DC-DC converter 15 after being protected by the fuse 14; the second pin is negative, connected to the low-voltage negative terminal of the DC-DC converter 15; the communication pin connects to the controller 17. The high-voltage output of the DC-DC converter 15 is connected to the circuit breaker 16, and then to the external power connector 18. The controller 17 controls the output unit 3 as a whole and communicates with external devices through the external communication connector 19. The DC-DC converter 15 performs voltage conversion, controlling a stable output voltage. The output unit housing 21 is used for mounting internal components, and the output unit cover 22 provides sealing protection. An output unit connection and fixing mechanism 23 is mounted on the back of the output unit, allowing the output unit to be connected to a mounting bracket.

[0043] The structure of short-circuit unit 4 is as follows Figure 5 As shown, a terminal connector 24, identical to the input connector 7 of battery pack 2, is installed. The first and second pins of the terminal connector 24 are shorted inside the shorting unit, allowing for impedance matching during communication interruptions. The terminal connector 24 is fixed to the shorting unit mounting plate 25 and sealed and protected by the shorting terminal housing 26. The back of the shorting unit 4 is equipped with a shorting unit connection and fixing mechanism 27, which connects the shorting unit 4 to the fixing bracket 1.

[0044] The back connection and fixing devices of battery pack 2, output unit 3, and shorting unit 4 have similar structures, differing only in width, such as... Figure 6 As shown. The connecting and fixing mechanism adopts a slot form, which serves both as a guide and a fixing function, fixing the battery pack 2, output unit 3, and shorting unit 4 to the fixing bracket 1.

[0045] The mounting bracket 1 consists of two parts: a bracket body 28 and a bracket end plate 29. The bracket body 28 guides and supports the battery pack 2, output unit 3, and short-circuit unit 4; the bracket end plate 29 limits the movement at both ends to prevent the components from sliding. The bracket body 28 has a series of mounting holes 30 for fixing to the wall, allowing it to be secured to the wall using expansion screws or similar methods. The bracket body also has horizontally penetrating mounting holes 31 for the bracket end plate, which can be used with bracket end plate fixing screws 32 to fix the bracket end plate 29. Figure 7 As shown. The bracket body 28 can be cut to size according to actual needs, or it can be extended by splicing after being positioned by the bracket connecting parts 33, such as... Figure 8 As shown.

[0046] During product use, the number of battery pack 2 connectors can be flexibly increased to expand the power capacity according to actual needs. For example, initially, one battery pack 2 may be sufficient for the load. From a cost perspective, if the battery pack uses only one battery pack 2, such as... Figure 9 As shown. Later, as the load increases, two more battery packs 2 need to be added. First, remove the original bracket end plate 29 on the side of the shorting unit 4 and detach the shorting unit. Then, cut a bracket body 28 of appropriate size and connect it to the original bracket body via the bracket connecting component 33. Finally, fix the newly added bracket body to the wall. Figure 10 As shown. After installing the new bracket body 28, insert and install the two new battery packs 2, and install the shorting unit 4 at the end. Finally, install the bracket end plate 29 to complete the capacity expansion of the two battery packs, as shown. Figure 11 As shown.

[0047] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A wall-mounted battery pack series power expansion structure, characterized in that, It includes a fixed bracket (1), at least one battery pack (2), an output unit (3), and a shorting unit (4); the battery pack (2), the output unit (3), and the shorting unit (4) are all horizontally mounted on the fixed bracket (1), and the battery pack (2), the output unit (3), and the shorting unit (4) are electrically connected by connector plugging.

2. The wall-hanging battery pack series power extension structure according to claim 1, characterized in that, The battery pack (2) is provided with a first module (5) and a second module (6) distributed vertically. The battery pack (2) has an input connector (7) on the left and an output connector (8) on the right. The left end of the first module (5) is the overall positive terminal of the module and is connected to the first pin of the input connector (7), and the right end is the overall negative terminal of the module and is connected to the first pin of the output connector (8). The left end of the second module (6) is the overall negative terminal of the module and is connected to the second pin of the input connector (7), and the right end is the overall positive terminal of the module and is connected to the second pin of the output connector (8).

3. The wall-hanging battery pack series power extension structure according to claim 2, characterized in that, The battery pack (2) is also provided with a sampling plate (9) and a module bracket (10). The sampling plate (9) is used to collect and convert the voltage and temperature data of the first module (5) and the second module (6). The converted data is exchanged with the outside through the signal pins of the input connector (7) and the output connector (8). The module bracket (10) is used to fix the first module (5), the second module (6) and the sampling plate (9) to the battery pack housing (11).

4. The wall-hanging battery pack series power extension structure according to claim 3, characterized in that, The battery pack housing (11) is equipped with a battery pack connection and fixing mechanism (12) on the back. The battery pack connection and fixing mechanism (12) adopts a slot form and is used to connect and fix the battery pack (2) to the fixing bracket (1). The battery pack (2) also includes a battery pack cover plate (13) for sealing and protection.

5. The wall-hanging battery pack series power extension structure according to claim 1, characterized in that, The output unit (3) is equipped with a fuse (14), a DC-DC converter (15), a circuit breaker (16), a controller (17), an external power connector (18), an external communication connector (19), and a battery connector (20). The first pin of the battery connector (20) is positive and is connected to the positive low-voltage side of the DC-DC converter (15) via the fuse (14). The second pin is negative and is connected to the negative low-voltage side of the DC-DC converter (15). The communication pin is connected to the controller (17). The high-voltage side output of the DC-DC converter (15) is connected to the circuit breaker (16) and then connected to the external power connector (18) via the circuit breaker (16). The controller (17) communicates with external devices through the external communication connector (19).

6. The structure for expanding the electric capacity of the series connection of the wall-hanging battery pack according to claim 5, wherein The output unit (3) also includes an output unit housing (21) and an output unit cover plate (22). The output unit housing (21) is used to install internal components, and the output unit cover plate (22) is used for sealing and protection. The output unit (3) is equipped with an output unit connection and fixing mechanism (23) on its back. The output unit connection and fixing mechanism (23) adopts a slot form and is used to connect and fix the output unit (3) to the fixing bracket (1).

7. The wall-hanging battery pack series power extension structure according to claim 1, characterized in that, The shorting unit (4) is equipped with a terminal connector (24), which is the same as the input connector (7) of the battery pack (2). Its first and second pins are shorted inside the shorting unit (4), and the communication pins are used for communication interruption impedance matching. The terminal connector (24) is fixed on the shorting unit mounting plate (25), and the shorting unit (4) is sealed and protected by the shorting unit housing (26).

8. The structure according to claim 7, wherein The shorting unit (4) is equipped with a shorting unit connection and fixing mechanism (27) on its back. The shorting unit connection and fixing mechanism (27) adopts a slot form and is used to connect and fix the shorting unit (4) to the fixing bracket (1).

9. The wall-hanging battery pack series power extension structure according to claim 1, characterized in that, The fixed bracket (1) consists of a bracket body (28) and a bracket end plate (29). The bracket body (28) is used to guide and support the battery pack (2), output unit (3), and short-circuit unit (4). The bracket end plate (29) is used for limiting the two ends. The bracket body (28) is provided with a fixing hole (30) for fixing the fixed bracket (1) to the wall, and is provided with a horizontally penetrating bracket end plate mounting hole (31) for fixing the bracket end plate (29) with the bracket end plate fixing screw (32).

10. The wall-hanging battery pack series power extension structure according to claim 9, characterized in that, The bracket body (28) is positioned by the bracket connecting component (33) and then spliced ​​and extended.

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