Household energy storage battery system

Abstract

The utility model discloses a household energy storage battery system which is formed by sequentially stacking a base, at least one battery module, a main control module and an upper cover from bottom to top. The household energy storage system is a compact, modularized, light, safe and reliable household energy storage battery system with a simple process, and the bearing part of the main body of each module box body adopts an aluminum alloy material and an aluminum profile extrusion forming process, so that compared with a traditional metal plate box body, the household energy storage system is higher in size precision, lighter in weight and more attractive in appearance; according to the scheme that the two battery packs are stacked up and down, the overall structure is more compact, the fixing mode is more reliable, and the overall technological process is simpler.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage battery, especially to a household energy storage battery system. BACKGROUND

[0002] With the increasing emphasis on sustainable energy utilization and the continuous progress of technology, household energy storage batteries, as a key device to promote household energy self-sufficiency and reduce dependence on traditional power grids, are experiencing rapid development and popularization. This trend not only reflects people's sense of responsibility for environmental protection, but also reflects the pursuit of a more efficient and convenient lifestyle. In recent years, household energy storage battery products have developed rapidly, and traditional household energy storage system solutions have been unable to meet the increasing aesthetic and performance demands of people. In the prior art, sheet metal boxes are used, and the process is relatively simple, only suitable for producing some regular-shaped products, with simple shapes and no differentiation. At the same time, sheet metal boxes are relatively heavy, increasing the overall weight of the battery and the difficulty of installation and maintenance. In addition, sheet metal boxes have poor weather resistance and are prone to rust when used outdoors, reducing the service life. Multiple battery packs are arranged horizontally inside the battery box, increasing the overall depth and occupying too much household space, which is not user-friendly. The battery pack fixing frame structure is complex and extensive, not compact enough, and has many assembly processes, increasing the difficulty and cost of production and manufacturing. The battery pack fixing method is unique, with the battery pack hanging on a long bolt, which increases the risk of bolt failure and safety hazards. The battery system is not expandable and only supports floor installation or wall mounting, which has certain limitations.

[0003] In the patent with application publication number CN113745733A, a modular household energy storage battery system is provided, which includes one or more modular battery boxes, a control box, and a base. The base, modular battery box, and control box are placed in a stacked manner. The modular battery box includes at least a battery box bottom shell, battery modules, a battery box upper cover, and a battery box bottom support. The battery box bottom shell has several battery modules arranged inside. The positive and negative electrodes of the several battery modules are arranged in a left-right direction. The control box includes at least a control box bottom shell, a control box upper cover, and a top cover. This technical solution is more suitable for household energy storage batteries, with high safety, multiple battery boxes in parallel expansion, good waterproof and dustproof effect, easy installation without dependence on wall structure, and more suitable for household use. In this technical solution, a stacked design is adopted, which has expansion capability, but uses a sheet metal box, which is relatively heavy, and there is a springback phenomenon during sheet metal processing, which may affect the final size accuracy, the size deviation may increase, the size consistency is poor, which will cause product alignment and other adverse effects after stacking, and only supports floor installation, which has certain limitations.

[0004] As in CN115579564A, a household energy storage battery module and an inverter integrated board are disclosed, which includes a switch button arranged on the surface of the battery module, a positioning pin movably mounted around the top surface of the battery module and the bottom surface of the inverter module, and a connector pin end one and a connector pin end two arranged on one side of the top surface of the battery module and one side of the bottom surface of the inverter module. The present application is provided with two groups of modules, which are connected in series by the soft connection aluminum row, and the current is collected by the aluminum row. The two modules are connected in series by the soft connection aluminum row, and the aluminum row is extracted from the positive and negative electrodes. After the module is fixed, the protection plate is fixed on the front panel of the shell, and after the electrical circuit is connected, the grouping of a single battery module is completed, which is convenient for the installation and debugging of each unit module and can be grouped according to the needs of the client. The selection range of the customer's demand for power and price is convenient and increased. In this technical solution, a stacked design is also used, which has scalability, but also uses a sheet metal material box, which has the problems of heavy weight and poor size consistency. The six surfaces of the box need to be fixed with bolts, which increases the production operation time and production cost, and it is difficult to ensure the protection level of the box. At the same time, the multiple battery groups are arranged horizontally in the box, which increases the overall depth size of the battery module, resulting in more space occupied in the depth direction, which is not friendly to home use, and only supports floor installation, which has certain limitations.

[0005] As in CN218731460U, a household energy storage battery module is disclosed, which includes a battery assembly for providing external power, a cabinet shell for supporting the battery assembly, the cabinet shell includes a box with an open front end, the two side walls of the box cavity are symmetrically installed with guide rails for pulling out or pushing into the box, and the box and the battery assembly are also provided with a locking mechanism for fixing the position. The battery module can be assembled outside the cabinet shell, which is convenient to assemble; the installation and wiring of the battery module are no longer affected by the size of the cabinet shell, which reduces the operation space required during assembly in the box, thereby reducing the overall size of the cabinet shell; the modular integration degree is high, the connecting piece allows multiple cabinet shells to be connected together, the battery storage terminals and communication interfaces are provided on the side wall of the box, and multiple household energy storage battery modules can be connected together for use. In this technical solution, a sheet metal box is still used, which has the problems of heavy weight and poor size consistency. Although the battery groups in the box adopt an up-down stacking scheme, the battery group fixing frame structure is relatively complex and extensive, not compact, and multiple positions need to be fixed with bolts, which increases the production operation time and production cost.

[0006] As in the granted patent CN220138522U, a household energy storage box and energy storage equipment are involved. The household energy storage box includes a box body, a battery module, a fixing plate group, and a plurality of fasteners. The box body is provided with an assembly cavity and an assembly opening communicating with the assembly cavity, and a plurality of battery modules are respectively installed in the assembly cavity through the assembly opening. Moreover, the assembly cavity is provided with a plurality of installation positions, and the assembly opening includes a plurality of installation ports, each installation port and installation position are one-to-one correspondingly arranged, so that each battery module can be installed in the corresponding installation position through the corresponding installation port. The fixing plate group is arranged on one side of the assembly cavity close to the assembly opening and connected to the inner wall of the assembly cavity, and the fasteners are sequentially arranged through the fixing plate group and the battery module and connected to the box body, so that the two ends of the battery module are respectively connected to the fixing plate group and the box body. The household energy storage box and energy storage equipment provided by the present application solve the problem of inconvenient installation of internal parts of the existing household energy storage box. In this technical solution, the box body still adopts the sheet metal bending process, and there is a problem of poor size consistency. Although the battery group in the box body adopts an upper and lower stacking scheme, the fixing method is to use bolts for horizontal fixing, and the weight of the module is entirely borne by the horizontal bolts, which has a risk of bolt failure.

[0007] As in the granted patent CN220138522U, a household energy storage box and energy storage equipment are involved. The household energy storage box includes a box body, a battery module, a fixing plate group, and a plurality of fasteners. The box body is provided with an assembly cavity and an assembly opening communicating with the assembly cavity, and a plurality of battery modules are respectively installed in the assembly cavity through the assembly opening. Moreover, the assembly cavity is provided with a plurality of installation positions, and the assembly opening includes a plurality of installation ports, each installation port and installation position are one-to-one correspondingly arranged, so that each battery module can be installed in the corresponding installation position through the corresponding installation port. The fixing plate group is arranged on one side of the assembly cavity close to the assembly opening and connected to the inner wall of the assembly cavity, and the fasteners are sequentially arranged through the fixing plate group and the battery module and connected to the box body, so that the two ends of the battery module are respectively connected to the fixing plate group and the box body. The household energy storage box and energy storage equipment provided by the present application solve the problem of inconvenient installation of internal parts of the existing household energy storage box. In this technical solution, the box body still adopts the sheet metal bending process, and there is a problem of poor size consistency. Although the battery group in the box body adopts an upper and lower stacking scheme, the fixing method is to use bolts for horizontal fixing, and the weight of the module is entirely borne by the horizontal bolts, which has a risk of bolt failure.

[0008] In summary, the traditional household energy storage battery box adopts a sheet metal stamping and bending scheme, which has the advantages of low cost and simple development. However, due to poor size consistency, multiple battery boxes may have assembly difficulties and poor alignment after stacking, which may further result in poor overall appearance. In addition, the power of a single battery box is low, which may result in high cost per watt-hour. Therefore, it is necessary to install as many battery modules as possible. Although some solutions install two battery groups in a single box, the horizontal arrangement results in a deep battery depth and a large footprint, which is not friendly to household use. Some solutions use two battery groups stacked vertically, but the battery frame used is complex and the structure design is not compact, which has a high risk of bolt failure. Some products only support floor installation, which has certain limitations.

[0009] As household energy storage batteries gradually tend to be home appliances, it means that their design needs to pay more attention to aesthetics, thinness, user-friendliness, etc. Simple process, convenient production and manufacturing; lightweight, convenient installation and maintenance; thinner, reducing the floor area of the family; modular, allowing users to expand the power according to actual needs. Lighter and thinner, so as to better integrate into modern family life.

[0010] Through modular design, the flexibility, scalability and maintainability of the product can be improved. Flexibility is reflected in allowing users to increase or decrease energy storage modules according to actual needs to meet the energy storage needs in different scenarios; scalability is reflected in that as the demand for household electricity grows, users can add more energy storage modules according to their needs without replacing the entire energy storage system; maintainability is reflected in that the failure of a single module will not affect the operation of the entire system, and the faulty module can be quickly located and replaced. Through lightweight design, it is not simply to reduce the mass in working order, but to reduce the mass in working order as much as possible under the premise of ensuring strength and safety performance and ensuring that the manufacturing cost is within a reasonable range, so as to achieve the unity of safety and economy. At the same time, reducing the mass in working order facilitates installation and maintenance, and reduces the operation difficulty. Through the thin design, it can better meet the aesthetic standards of modern home appliances, and the floor area is smaller, which is suitable for the characteristics of limited space in modern families. Practical new type content

[0011] The utility model aims at overcoming the insufficient and defect of prior art, and provides a compact, modular, lightweight, simple process, safe and reliable, supporting multiple installation methods and appearance beautiful household energy storage battery system.

[0012] In order to realize the above-mentioned purpose, the following solutions are adopted in the present application:

[0013] A household energy storage battery system is stacked from bottom to top by a base, at least one battery module, a main control module and an upper cover.

[0014] Among them, the battery module contains a battery box, a battery box left shell and a battery box right shell; at least two battery packs are arranged and assembled in the battery box in a stacked manner, and the battery box left shell and the battery box right shell are assembled on the left side and the right side of the battery box.

[0015] Among them, the battery pack is assembled in the battery box through a support, and the positive and negative electrode lead-out directions of the battery pack are arranged in a left-right symmetrical manner; wherein the upper layer battery pack is assembled above the first support, and the lower layer battery pack is assembled above the second support.

[0016] Among them, a fire-fighting module is arranged in the battery box left shell, and a protection plate is arranged in the battery box right shell.

[0017] The battery box right shell is internally provided with a stacking connector.

[0018] The front side of the battery box is provided with a battery box decorative panel, and the battery box and the battery box left shell and the battery box right shell at the left and right ends are covered at the front side.

[0019] The main control module comprises a high-voltage box, a high-voltage box left shell and a high-voltage box right shell which are detachably connected with the high-voltage box, and a control unit; the control unit is arranged in the high-voltage box; the control unit is arranged in the high-voltage box and is closed by the high-voltage box left shell and the high-voltage box right shell at the left and right sides of the high-voltage box; and the high-voltage box is detachably provided with a high-voltage box decorative panel at the front side, so as to cover the high-voltage box, the high-voltage box left shell and the high-voltage box right shell at the front side.

[0020] The control unit comprises a BMU unit.

[0021] The high-voltage box left shell is internally provided with a direct-current circuit breaker; and the high-voltage box right shell is internally provided with a power output connector and a communication debugging connector.

[0022] The base comprises a base body, a base left shell and a base right shell, and the left end and the right end of the base are detachably provided with the base left shell and the base right shell; the base comprises a base decorative panel, and the base decorative panel covers the base body, the base left shell and the base right shell at the front side; and the base comprises four foundation bolts which are arranged on the bottom surface of the base body in a rectangular shape.

[0023] The household energy storage system is compact, modular and light in weight, and is simple in process, safe and reliable, each module box body main bearing part of the household energy storage battery system adopts an aluminum alloy material, an aluminum profile extrusion forming process, compared with a traditional sheet metal box body, the size precision is higher, the weight is lighter, and the appearance is more beautiful; the overall structure of the two battery packs stacked up and down is more compact, the fixing mode is more reliable, and the overall process is simpler. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the overall schematic view of the household energy storage system of the utility model.

[0025] Figure 2 It is the appearance schematic view of the battery module of the utility model.

[0026] Figure 3 It is the exploded schematic view of the battery module of the utility model.

[0027] Figure 4 It is the double-layer structure schematic view of the battery pack of the utility model.

[0028] Figure 5It is the appearance schematic view of the main control module of the utility model.

[0029] Figure 6 It is the exploded view of the main control module of the utility model.

[0030] Figure 7 It is the appearance schematic view of the base of the utility model.

[0031] Figure 8 It is the appearance schematic view of the base of the utility model.

[0032] Figure 9 It is the exploded view of the base of the utility model.

[0033] Figure 10 It is the assembly schematic view of the double-layer battery of the utility model.

[0034] Figure 11 It is the schematic view of the L-shaped support of the utility model.

[0035] Figure 12 It is the schematic view of the square support of the utility model. DETAILED DESCRIPTION

[0036] The utility model will be further explained in detail in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0037] Referring to the drawings, Figure 1 The household battery storage system of the utility model is stacked from bottom to top by the base 3, the plurality of battery modules 1, the main control module 2 and the upper cover 4.

[0038] Referring to the drawings, Figure 2 , Figure 3 and Figure 4 The battery module 1 comprises the battery box 101, the battery box left shell 102 and the battery box right shell 103. At least two battery groups 105 are assembled in the battery box, and the battery box left shell and the battery box right shell are assembled on the left side and the right side of the battery box.

[0039] In some embodiments, the battery group is assembled through the support, and the positive and negative electrode lead-out directions of the battery group 105 are arranged in left-right symmetry. In the case that two battery groups are assembled in one battery box, the upper layer battery group is arranged above the first support 107, and the lower layer battery group is arranged above the second support 106.

[0040] Optionally, the first support 107 is an L-shaped support, i.e., a long strip-shaped support with an L-shaped cross section, and the second support 106 is a square-shaped support, i.e., a long strip-shaped support with a rectangular cross section, and the upper and lower battery packs are connected in series by a connecting row. The battery packs are stacked up and down, and the installation and fixing mode is simple and reliable.

[0041] Specifically, during installation, first, the two square-shaped supports are placed in a tool, then the lower battery pack is placed on the square-shaped support, then the two L-shaped supports are placed above the lower battery pack, the cylindrical limiting column (see Figure 10 ) on the L-shaped support is inserted into the end plate circular hole of the lower battery pack, and finally, the upper module is placed on the L-shaped support, and the corresponding position of the box bottom has a press rivet nut, and then the four long screw rods are used to fix the parts.

[0042] In some embodiments, the battery box left shell 102 is provided with a fire-fighting module 108, which is an off-the-shelf product, used to spray aerosol for fire extinguishing after the battery catches fire

[0043] In some embodiments, the battery box right shell 103 is provided with a protection plate 109, which includes a local management unit (LMU) for monitoring the voltage and temperature of the battery.

[0044] Further, the battery box right shell 103 is provided with a stacking connector 110, which is used to realize the electrical connection inside the battery pack and is an off-the-shelf product.

[0045] In some embodiments, the battery box 101 has a battery box decorative panel 104 on the front side, covering the battery box 101 and the battery box left shell 102 and the battery box right shell 103 at the left and right ends on the front side, which is connected to the battery box 101 by a buckle structure.

[0046] In this application, the battery box left shell 102 and the battery box right shell 103 are connected to the battery box 101 by bolts after being plugged in.

[0047] In the above-mentioned main control module, the battery box 101 is made of metal material, such as aluminum alloy material, which is lighter in weight, and the aluminum alloy material is more simple in process; the surface is treated by anodic oxidation, which is more beautiful in appearance.

[0048] Among them, the battery box left shell 102 and the battery box right shell 103 at the left and right ends of the battery box 101 are made of plastic material, which is lighter in weight and more diverse in shape; the battery box decorative panel 104 is added to the front of the battery box 101, which is more rich in overall appearance and more in line with the aesthetic needs of modern people.

[0049] See Figure 5and Figure 6 As shown in the drawings, in some embodiments, the master control module 2 comprises a high-voltage box 201, a high-voltage box left shell 202 and a high-voltage box right shell 203 detachably connected to the high-voltage box 201, and a control unit 205; the control unit 205 is arranged in the high-voltage box 201; after the control unit 205 is arranged in the high-voltage box, the high-voltage box left shell 202 and the high-voltage box right shell 203 close the left side and the right side of the high-voltage box.

[0050] Optionally, the high-voltage box left shell 202 and the high-voltage box right shell 203 are connected to the left side and the right side of the high-voltage box 201 by screws, facilitating installation and disassembly. The plug-in parts of the high-voltage box left shell and the high-voltage box right shell are matched and inserted into the holes at the left end and the right end of the high-voltage box, and then locked by four bolts or screws arranged around.

[0051] In some embodiments, the high-voltage box left shell 202 is provided with a direct current circuit breaker; and the high-voltage box right shell 203 is provided with a power output connector and a communication debugging connector and other connecting devices (not shown).

[0052] In some embodiments, the front of the high-voltage box 201 is detachably provided with a high-voltage box decorative panel 204, covering the high-voltage box 201, the high-voltage box left shell 202 and the high-voltage box right shell 203 from the front side, which can be connected by a buckle structure.

[0053] The control unit 205 of the master control module comprises a battery management unit BMU. During the use of the energy storage system, the battery management unit BMU of the master control module can determine the state of the battery cell and whether the system has a fault, and send the state of the energy storage system to the PCS. The energy storage battery system comprises a local management unit LMU, which can collect the voltage and temperature of the battery cell. When the temperature of the battery cell is too low, the battery pack is heated by a heating film.

[0054] In the above master control module, the high-voltage box 201 is made of metal material, such as aluminum alloy material. The use of aluminum alloy material makes the whole weight lighter, and the use of aluminum profile extrusion forming process makes the process simpler. The surface is treated by anodic oxidation, and the appearance is more beautiful. The high-voltage box left shell 202 and the high-voltage box right shell 203 at the left and right ends of the high-voltage box 201 are made of plastic material, which is lighter in weight and more diverse in shape. The high-voltage box decorative panel 204 is added to the front of the master control module 2, which makes the overall appearance more abundant and more in line with the aesthetic needs of modern people.

[0055] Referring to Figure 7 , Figure 8 and Figure 9As shown, in some embodiments, the base 3 comprises a base body 301, a base left shell 302, and a base right shell 303, and the left end and the right end of the base are detachably assembled with the base left shell and the base right shell, such as by bolt or screw connection.

[0056] In the above base, the left end and the right end of the base are detachably assembled with the base left shell and the base right shell, such as by bolt or screw connection.

[0057] In some embodiments, the base 3 comprises a base decorative panel 304, which covers the front side of the base body 301, the base left shell 302, and the base right shell 303, and can be connected by a buckle structure.

[0058] In some embodiments, the base 3 comprises four anchor bolts 305 arranged in a rectangular shape on the bottom surface of the base body to support the base and the modules thereon and facilitate height adjustment.

[0059] In the above base, the base body 301 is made of metal material, such as aluminum alloy material, which is lighter in weight and simpler in process, and is made of aluminum profile extrusion forming process, which is more beautiful in appearance. The base left shell 302 and the base right shell 303 at the left and right ends of the base body 301 are made of plastic material, which is lighter in weight and more diverse in shape. The base decorative panel 304 is added to the front of the base 3, which is more rich in overall appearance and more in line with the aesthetic needs of modern people.

[0060] The utility model household energy storage system, aluminum alloy material is adopted to the box body main part, the whole weight is lighter, aluminum profile extrusion forming process is adopted, the process is simpler, the appearance is more beautiful, the traditional plastic material is adopted to the left and right two end shell, the weight is lighter, the shape is more various, the decorative panel is added to the module front part, the whole appearance is richer, more in line with the aesthetic needs of modern people.

[0061] The utility model household energy storage system adopts modular design as a whole, which is convenient for terminal users to select according to their own needs, and is also simpler for later expansion. The battery module is innovatively designed inside the battery box, so that the double-layer stacking arrangement scheme of the battery pack is simpler, more compact and more reliable. At the same time, the utility model household energy storage system supports floor installation and wall-mounted installation through the wall-mounted bracket on the back of the box.

[0062] Through the above description, it can be seen that the household energy storage battery system has the advantages of compact overall structure, simple manufacturing process, high space utilization, small land occupation, beautiful appearance, convenient capacity expansion, safety and reliability.

[0063] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model;

[0064] Therefore, no matter from which point, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.

[0065] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A residential energy storage battery system, characterized by, It consists of a base, at least one battery module, a main control module, and a top cover stacked from bottom to top.

2. The residential energy storage battery system of claim 1, wherein, The battery module includes a battery box, a left battery box shell, and a right battery box shell; at least two battery packs are stacked vertically within the battery box, and the left and right battery box shells are mounted on the left and right sides of the battery box, respectively.

3. The residential energy storage battery system of claim 2, wherein, The battery pack is assembled in the battery box by a bracket, and the positive and negative leads of the battery pack are arranged symmetrically from left to right; wherein, the upper battery pack is assembled on the top of the first bracket, and the lower battery pack is assembled on the top of the second bracket.

4. The residential energy storage battery system according to claim 2, characterized in that, A fire suppression module is installed inside the left shell of the battery box, and a protection plate is installed inside the right shell of the battery box.

5. The residential energy storage battery system according to claim 2, characterized in that, A stacking connector is installed inside the right shell of the battery box.

6. The residential energy storage battery system according to claim 2, characterized in that, The front of the battery box has a decorative panel that covers the battery box and the left and right battery boxes at both ends.

7. The residential energy storage battery system according to claim 1, characterized in that, The main control module includes a high-voltage box, a left shell of the high-voltage box, a right shell of the high-voltage box, and a control unit that are detachably connected to the high-voltage box. The control unit is installed inside the high-voltage box. After the control unit is installed inside the high-voltage box, it is closed by the left shell and the right shell of the high-voltage box on the left and right sides of the high-voltage box. A high-voltage box decorative panel is detachably arranged on the front of the high-voltage box, covering the high-voltage box, the left shell, and the right shell of the high-voltage box on the front side.

8. The residential energy storage battery system according to claim 7, characterized in that, The control unit includes a BMU unit.

9. The residential energy storage battery system according to claim 7, characterized in that, A DC circuit breaker is installed inside the left shell of the high-voltage box; a power output connector and a communication debugging connector are installed inside the right shell of the high-voltage box.

10. The residential energy storage battery system according to claim 1, characterized in that, The base includes a base body, a base left shell, and a base right shell. The left and right ends of the base are detachably assembled with the base left shell and the base right shell. The base includes a base decorative panel that covers the base body, base left shell, and base right shell on the front side. The base includes four anchor bolts arranged in a rectangular shape on the bottom surface of the base body.

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