Household battery module and battery box assembly

Abstract

The invention belongs to the technical field of battery energy storage, and discloses a household battery module and a battery box assembly. The household battery module comprises a base, a controller and battery packs connected between the base and the controller in series or in parallel, each battery pack is provided with a quick-plug terminal male head and a quick-plug terminal female head, each quick-plug terminal male head and each quick-plug terminal female head comprise a power port and a communication port, a power line is led out from each power port to be connected with a positive terminal or a negative terminal of the corresponding battery pack, and the communication port is communicated with the power port. A communication line is led out from the communication port to be connected with the battery packs, and the quick-plug terminal male head of one battery pack is matched with the quick-plug terminal female head of the other battery pack in an inserted mode to achieve series connection or parallel connection. According to the invention, rapid mounting and dismounting of a plurality of battery packs are easy to realize, and the dismounting process flow is simplified; when a plurality of battery packs are connected in series or in parallel, communication connection is realized, the installation wiring is reduced, the disassembly and assembly complexity is reduced, and the safety and reliability are high.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to a household battery module and a battery box assembly. Background Art

[0002] Household energy storage is an energy storage and management system used in a home environment. It is usually used in scenarios such as home power supply, smart grid, backup power supply, and new energy hybrid. It has off-grid and grid-connected operation modes, and can achieve seamless switching of operation modes by configuring an energy management system. It can also adjust the operation strategy according to the grid, load, energy storage, and electricity price to achieve system operation optimization and maximize user benefits.

[0003] At present, household energy storage uses battery boxes to store battery modules. When considering the replacement of battery cell specifications from the perspectives of product price, supply chain security, and battery compliance, the battery box is not adaptable and cannot be backward compatible with multiple specifications of battery cells. The cost of redesigning and manufacturing battery boxes and corresponding accessories is very high; the discarding of the original battery box will also cause a waste of resources. Even if the battery box can meet the requirements of different specifications of battery cells in terms of size, if there is a lack of fine design, there will be large deviations in parameters such as the internal capacity and voltage level of different batches of battery boxes, which will lead to product compatibility issues and affect the satisfaction of installers and users with the product.

[0004] The battery boxes used for household energy storage include integrated and split units. The integrated unit is usually pre-installed and wired by the manufacturer, so it can be installed faster in the user's home; but the integrated unit lacks the advantage of flexible combination, and the cost is higher when multiple units are connected in parallel to expand the capacity. Users who are more sensitive to price may choose split units to achieve more flexible capacity configuration. Existing split units have problems such as excessive weight, too much installation wiring, and complex installation. The process of installing and connecting power lines, communication lines, etc. is complicated, lacks safety locks, and is prone to accidents such as misoperation and tipping. Professional skills and corresponding tools are required during installation or disassembly, and the maintenance time is long, which increases labor costs. Summary of the invention

[0005] The object of the present invention is to provide a household battery module and a battery box assembly to solve the problems of complex installation or disassembly and high expansion cost of household energy storage equipment.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A household battery module comprises a base, a controller and a battery pack connected in series or in parallel between the base and the controller, each of the battery packs is provided with a male quick-plug terminal and a female quick-plug terminal, the male quick-plug terminal and the female quick-plug terminal both comprise a power port and a communication port, wherein the power port is used to lead out a power line to connect the positive / negative terminals of the battery pack, and the communication port is used to lead out a communication line to connect the battery pack, the male quick-plug terminal of one battery pack is plugged into the female quick-plug terminal of another battery pack to achieve series or parallel connection.

[0008] In some embodiments, when multiple battery packs are connected in series, the battery pack includes a battery module and a BMU, the male quick-plug terminal and one power port of the female quick-plug terminal are respectively connected to the positive and negative poles of the battery pack, the other power ports of the male quick-plug terminal and the female quick-plug terminal are connected through a power line, and the two ends of the BMU are respectively connected to the communication ports of the male quick-plug terminal and the female quick-plug terminal.

[0009] In some embodiments, the base is provided with a base quick-plug terminal male head, and two power ports of the base quick-plug terminal male head are connected by a power line for conduction.

[0010] In some embodiments, the controller includes a PCU and a first DC / DC module, the controller has a top quick-plug terminal female and an external terminal, the two power ports of the top quick-plug terminal female are respectively connected to the positive and negative bus bars of the power line to the first DC / DC module, and the first DC / DC module is also connected to the external terminal through the power line for power transmission with an external device; the top quick-plug terminal female is also connected to the communication line to the PCU, and the PCU is communicatively connected to the external device through the communication port of the external terminal.

[0011] In some embodiments, when multiple battery packs are connected in parallel, the battery pack includes a battery module, a BMS and a second DC / DC module. The two power ports of the male quick-plug terminal are respectively connected to the two power ports of the female quick-plug terminal through two power lines, and the positive and negative poles of the battery pack are respectively connected to the two power lines through the second DC / DC module. The communication port of the male quick-plug terminal is communicatively connected to the communication port of the female quick-plug terminal, and is also communicatively connected to the BMS.

[0012] In some embodiments, the controller has a top quick-plug terminal female and an external terminal, the top quick-plug terminal female is plugged into the quick-plug terminal male of the battery pack stacked on the top, the two power ports of the top quick-plug terminal female are respectively connected to the two power ports of the external terminal through two power lines, and the communication port of the top quick-plug terminal female is communicatively connected to the communication port of the external terminal.

[0013] In some embodiments, the household battery module further includes a heating module, and the heating module is disposed in close proximity to the battery pack, and the heating module draws power from the battery pack or the controller.

[0014] The present invention also provides a battery box assembly, comprising a base, a high-voltage control box and a plurality of battery boxes stacked between the base and the high-voltage control box, the battery box comprising a box body, the box body being provided with a battery pack of the household battery module provided by the present invention, the top plate and the bottom plate of the box body being provided with a boss hole and a groove hole respectively, the male quick-plug terminal and the female quick-plug terminal of each battery pack being installed in the boss hole and the groove hole respectively, when any two of the battery boxes are stacked, the boss hole of one battery box is matched with the groove hole of another battery box for plugging so that the battery packs inside the two battery boxes are connected in series or in parallel; the outer walls of the top plate and the bottom plate of the battery box are respectively provided with a positioning protrusion and a positioning groove, the positioning groove of the battery box stacked on top is matched with the positioning protrusion on the battery box below for positioning and assembly; a plurality of connecting plates are also arranged on the outside of the box body, the connecting plates are connected to the two adjacent boxes, to the box body and the base, and to the box body and the high-voltage control box.

[0015] In some embodiments, a tray is provided on the inner wall of the front cover of the battery box, and the battery module is fixedly mounted on the tray. A pressure strip is provided in the battery box, and the pressure strip is crimped to the battery module; fixed blocks are respectively provided on the two side panels of the box body, and the two ends of the pressure strip are respectively fixedly supported on two relatively arranged fixed blocks, and a wiring hole is provided on the pressure strip, and the power line and communication line of the battery pack are arranged along the pressure strip and passed through the wiring hole; a BMU / BMS is arranged on the side of the pressure strip away from the battery module.

[0016] In some embodiments, the inner walls of the top plate and the bottom plate of the battery box are respectively provided with limiting members, the limiting members are located between the tray and the pressure strip, and the battery module abuts against the two limiting members to limit the position.

[0017] In some embodiments, the inner wall and outer wall of a side plate of the box body are respectively provided with a second DC / DC module and a heat sink, and the inner wall of the side plate is coated with thermal conductive glue.

[0018] Beneficial effects of the present invention:

[0019] The household battery module provided by the present invention can easily realize the rapid installation and disassembly of multiple battery packs by arranging quick-plug terminal male heads and quick-plug terminal female heads on the battery packs, simplifying the assembly and disassembly process flow and having good versatility; by respectively arranging power ports and communication ports on the quick-plug terminal male heads and quick-plug terminal female heads, the battery packs can realize communication connection while being connected in series or in parallel, thus reducing installation wiring, reducing the complexity of assembly and disassembly and having high safety and reliability.

[0020] The battery box assembly provided by the present invention realizes energy regulation of energy storage equipment by stacking multiple battery boxes containing battery packs between a base and a high-voltage control box, and the battery boxes are easy to disassemble and assemble. Both the male quick-plug terminal and the female quick-plug terminal have both a power port and a communication port, which realizes power connection of the battery packs in series or parallel while realizing communication connection, reducing installation wiring and reducing the complexity of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of electrical connections of a household battery module provided in Embodiment 1 of the present invention (battery packs are connected in series);

[0022] Figure 2 This is a schematic diagram of electrical connections of a household battery module provided in Embodiment 1 of the present invention (battery packs connected in parallel);

[0023] Figure 3 This is a schematic diagram of the electrical connection of a household battery module provided in the third embodiment of the present invention (the battery packs are connected in series and have a battery pack heating function);

[0024] Figure 4 This is a schematic diagram of the electrical connection of a household battery module provided in the third embodiment of the present invention (the battery packs are connected in parallel and have a battery pack heating function);

[0025] Figure 5 1 is a schematic diagram of the structure of a single battery box in a battery box assembly in parallel mode provided in Embodiment 2 of the present invention (without the rear cover of the battery box);

[0026] Figure 6 It is a structural schematic diagram of a single battery box in a battery box assembly in parallel mode provided by Embodiment 2 of the present invention (a box body without a battery box installed);

[0027] Figure 7 1 is a schematic diagram of the internal structure of the battery box shell in the battery box assembly in the parallel mode provided in the second embodiment of the present invention (without the battery pack and the rear cover plate);

[0028] Figure 8It is a schematic diagram of the overall structure of the battery box assembly in the series mode provided by the second embodiment of the present invention (split machine product);

[0029] Fig. 9 yes Figure 8 a rear view of the battery box assembly shown;

[0030] Fig.10 yes Figure 8 Schematic diagram of the internal structure of the battery box assembly shown (without rear cover);

[0031] Fig.11 yes Figure 8 A cross-sectional view of the battery box assembly shown;

[0032] Fig.12 This is a schematic diagram of electrical connections of a household battery module provided in Embodiment 4 of the present invention (all-in-one product);

[0033] Fig.13 It is a structural schematic diagram of an assembled battery box assembly of a household battery module provided in Embodiment 4 of the present invention.

[0034] In the figure:

[0035] 1. Base; 11. Male quick-plug terminal of base;

[0036] 2. Controller; 21. PCU; 22. First DC / DC module; 23. Top quick-connect female terminal; 24. External terminal;

[0037] 3. Battery pack; 31. Male quick-plug terminal; 32. Female quick-plug terminal; 33. Battery module; 34. BMU; 35. Second DC / DC module; 351. Radiator; 36. BMS;

[0038] 4. High voltage control box;

[0039] 5. Box body; 51. Top plate; 511. Pressure strip; 512. Panel base; 513. BMU / BMS panel; 514. Fixing block; 515. Positioning protrusion; 52. Bottom plate; 521. Limiting piece; 53. Tray; 54. Back cover; 541. Pressure relief port; 542. Fixing device; 55. Connecting piece;

[0040] 6. Energy management unit; 7. Heating module. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] An embodiment of the present invention provides a household battery module, such as Figure 1 and Figure 2 As shown, it includes a base 1, a controller 2 and a battery pack 3 connected in series or in parallel between the base 1 and the controller 2, each battery pack 3 is provided with a quick-plug terminal male head 31 and a quick-plug terminal female head 32, the quick-plug terminal male head 31 and the quick-plug terminal female head 32 both include a power port and a communication port, wherein the power port is used to lead out a power line to connect the positive / negative terminals of the battery pack 3, and the communication port is used to lead out a communication line to connect the battery pack 3, and the quick-plug terminal male head 31 of one battery pack 3 is plugged into the quick-plug terminal female head 32 of another battery pack 3 to realize the series or parallel connection of multiple battery packs 3.

[0046] Embodiment 1:

[0047] like Figure 1 and Figure 2The illustrated embodiments are schematic diagrams of electrical connections of two battery packs 3 in series and two battery packs 3 in parallel, respectively, wherein the base 1 is a supporting structure, and the quick-plug terminal male head 31 and the quick-plug terminal female head 32 each include two power ports and one communication port, the power port connects the battery packs 3 through power lines to achieve series and parallel line presets, and the communication port connects the battery packs 3 for communication and ultimately achieves communication through the controller 2.

[0048] It can be understood that by providing the quick-plug terminal male head 31 and the quick-plug terminal female head 32 on the battery pack 3, it is easy to realize the rapid installation and disassembly of multiple battery packs 3, simplifying the disassembly and assembly process, and having good versatility; by respectively providing the power port and the communication port on the quick-plug terminal male head 31 and the quick-plug terminal female head 32, the battery pack 3 can realize the communication connection while being connected in series or in parallel, thus reducing the installation wiring, reducing the complexity of disassembly and assembly, and having high safety and reliability.

[0049] The series and parallel situations are explained below respectively.

[0050] like Figure 1 As shown, when multiple battery packs 3 are connected in series, the battery pack 3 includes a battery module 33 and a BMU 34, BMU 34 is a battery management unit of the battery module 33, and one power port of the quick-plug terminal male head 31 and the quick-plug terminal female head 32 of the battery pack 3 is respectively connected to the positive and negative poles of the battery pack 3 through power lines, and the other power ports of the quick-plug terminal male head 31 and the quick-plug terminal female head 32 are directly connected through power lines, and the two ends of the BMU 34 are respectively connected to the communication ports of the quick-plug terminal male head 31 and the quick-plug terminal female head 32.

[0051] Specifically, the power port is connected to the power line ( Figure 1 The solid line in the middle), the communication port is connected to the communication line ( Figure 1 The male quick-plug terminal 31 and the female quick-plug terminal 32 are respectively provided with two power ports and one communication port, wherein the first power port A of the male quick-plug terminal 31 and the first power port A of the female quick-plug terminal 32 are respectively connected to the positive and negative poles of the battery pack 3, and the second power port D of the male quick-plug terminal 31 is connected to the second power port D of the female quick-plug terminal 32 through a power line, and the two ends of the BMU 34 are respectively connected to the communication port of the male quick-plug terminal 31 and the communication port of the female quick-plug terminal 32, thereby realizing the communication connection between the male quick-plug terminal 31 and the female quick-plug terminal 32, and more precisely, utilizing the communication connection between the male quick-plug terminal 31 and the female quick-plug terminal 32 to realize the hand-in-hand communication connection of multiple battery packs 3.

[0052] The base 1 is provided with a base quick-plug terminal male head 11, and two power ports of the base quick-plug terminal male head 11 are connected by a power line for conduction.

[0053] The function of the base 1 is to fix and support the battery pack 3, and to connect the circuits of multiple battery packs 3 in series through the base quick-plug terminal male head 11. When multiple battery packs 3 are connected in series, the two power ports of the base quick-plug terminal male head 11 are connected through a power line. Then, when the quick-plug terminal female head 32 of the battery pack 3 is plugged into the base quick-plug terminal male head 11, the circuit is turned on and the battery packs 3 are connected in series.

[0054] In some embodiments, when connected in series, the controller 2 includes a secondary management unit PCU21 of the battery management system and a first DC / DC module 22, and the controller 2 has a top quick-plug terminal female connector 23 and an external terminal 24, and the two power ports of the top quick-plug terminal female connector 23 are respectively connected to the positive and negative bus bars of the power line to the first DC / DC module 22, and the first DC / DC module 22 is also connected to the external terminal 24 through the power line for power transmission with an external device; the communication port of the top quick-plug terminal female connector 23 is connected to the secondary unit PCU21 of the battery management system through a communication line, and is communicatively connected to an external control device through the communication port of the external terminal 24.

[0055] like Figure 1 As shown, the top quick-plug terminal female head 23 and the external terminal 24 respectively have two power ports (port A and port D) and a communication port. The top quick-plug terminal female head 23 is plugged into the quick-plug terminal male head 31 of the top battery pack 3 to realize power connection and communication connection; the two power ports of the top quick-plug terminal female head 23 are connected to the two power ports of the external terminal 24 through the first DC / DC module 22, and the communication port of the top quick-plug terminal female head 23 is connected to the PCU 21 through a communication line, and the PCU 21 exchanges data with an external management system such as EMS through the communication port of the external terminal 24.

[0056] like Figure 2 As shown, when multiple battery packs 3 are connected in parallel, the battery pack 3 includes a battery module 33, a battery management system BMS36 and a second DC / DC module 35; the two power ports (port B and port C) of the quick-plug terminal male connector 31 are respectively connected to the two power ports of the quick-plug terminal female connector 32 through two power lines, and the positive and negative poles of the battery module 33 are respectively connected to the two power lines through the second DC / DC module 35; the communication port of the quick-plug terminal male connector 31 is communicatively connected to the communication port of the quick-plug terminal female connector 32, and is also communicatively connected to the BMS36.

[0057] Specifically, the positive and negative electrodes of the battery module 33 are connected to the second DC / DC module 35, and connected to the positive and negative busbars of the power line through the second DC / DC module 35, wherein the positive busbar of the power line is connected between a power port of the male quick-plug terminal 31 and a power port of the female quick-plug terminal 32, and the negative busbar of the power line is connected between another power port of the male quick-plug terminal 31 and another power port of the female quick-plug terminal 32, and a communication line is connected between the communication port of the male quick-plug terminal 31 and the communication port of the female quick-plug terminal 32, the second DC / DC module 35 leads the positive and negative power lines to the positive and negative busbars of the power line, and the BMS36 leads the communication line to the male quick-plug terminal 31 and the female quick-plug terminal 32. When the male quick-plug terminal 31 and the female quick-plug terminal 32 of the two battery packs 3 are plugged in, the circuits of the two battery packs 3 are connected in parallel and communicate.

[0058] When the battery packs 3 are connected in parallel, the base 1 is provided with a base quick-plug terminal male head 11, and the quick-plug terminal female head 32 of the battery pack 3 at the bottom is plugged into the base quick-plug terminal male head 11. At this time, the quick-plug terminal female head 32 and the base quick-plug terminal male head 11 are mechanically plugged in, and after plugging in, the parallel connection of multiple battery packs 3 is completed.

[0059] When battery pack 3 is connected in parallel, Figure 2 As shown, the controller 2 has a top quick-plug terminal female head 23 and an external terminal 24. The top quick-plug terminal female head 23 is plugged into the quick-plug terminal male head 31 of the battery pack 3 stacked on the top. The two power ports of the top quick-plug terminal female head 23 lead the positive and negative bus bars of the power line to the two power ports of the external terminal 24. The communication line is connected in sequence to the communication port of the external terminal 24, the communication port of the top quick-plug terminal female head 23, and the battery management system BMS36 in the battery module 33 to realize communication connection.

[0060] Embodiment 2:

[0061] like Figure 5-Figure 11 The present invention further provides a battery box assembly, including a base 1, a high-voltage control box 4 and a plurality of battery boxes stacked between the base 1 and the high-voltage control box 4, the battery box including a box body 5, the box body 5 being provided with a battery pack 3 of a household battery module provided by the present invention, the top plate 51 and the bottom plate 52 of the box body 5 being provided with a boss hole and a groove hole, respectively, the male quick-plug terminal 31 and the female quick-plug terminal 32 of each battery pack 3 being installed in the boss hole and the groove hole, respectively, when any two battery boxes are stacked, the boss hole of one battery box is matched with the groove hole of another battery box for plugging and connecting so that the battery packs 3 inside the two battery boxes are connected in series or in parallel, thereby realizing rapid disassembly and assembly of multiple battery boxes.

[0062] Furthermore, the anti-dumping function is highly designed according to the center of gravity of the battery box to meet the following requirements:

[0063]

[0064] Among them, H is the height of the product, L is the length of the product, and W is the width of the product. is the maximum tilt angle of the battery box.

[0065] When the tilt angle of the battery box is lower than the maximum tilt angle When the battery box assembly is placed on the upper surface, the center of gravity of the battery box assembly does not exceed the range of the base 1. However, at this time, the center of gravity of some boxes 5 on the top layer may exceed the base 1, and gravity generates a rotation torque with the base 1 as the center. However, at this time, due to the high height of the quick-plug terminals, there is a large friction force on the connection surface of these boxes 5, which generates a reverse resistance torque, which offsets the rotation torque and prevents them from sliding, thus having an anti-dumping function. This anti-dumping design can prevent the connecting pieces 55 on the left and right sides from being too large and affecting the appearance.

[0066] The high-voltage control box 4 is used to install the controller 2, and the base 1, the high-voltage control box 4 and the box body 5 have the same length and width so as to obtain a battery box assembly with a consistent appearance.

[0067] like Figure 8 , a mounting hole for fixing the external terminal 24 is provided on one side of the high-voltage control box 4. The battery box assembly provided by the present invention realizes energy regulation of the energy storage device by stacking a plurality of battery boxes containing battery packs 3 between the base 1 and the high-voltage control box 4, and the disassembly and assembly between the battery boxes is simple. The male quick-plug terminal 31 and the female quick-plug terminal 32 both have a power port and a communication port, realizing the power connection of the battery pack 3 in series or in parallel while realizing the communication connection, reducing the installation wiring and reducing the complexity of disassembly and assembly.

[0068] The boxes 5 are plugged in and installed, and the series and parallel connection of the battery packs 3 can be plug-and-play. There is no need to connect the power cables and communication cables during the installation process, which simplifies the installation process. The battery box can be quickly disassembled and assembled like an all-in-one machine, and can adapt to different capacity requirements like a split machine.

[0069] When the capacities of the battery packs 3 are different, they are all packaged in boxes 5 of the same size.

[0070] In some embodiments, a tray 53 is provided on the inner wall of the front cover of the box body 5. During installation, the battery module 33 is fixedly installed on the tray 53. A pressure strip 511 is provided in the battery box, and the pressure strip 511 is crimped to the battery module 33. The BMU 34 or BMS 36 is arranged on the side of the pressure strip 511 away from the battery module 33.

[0071] like Figure 5-Figure 7The pressure strip 511 is an L-shaped piece. Of the two strips of the pressure strip 511, one strip is in contact with the inner wall of the top plate 51 or the bottom plate 52, and the other strip is perpendicular to the top plate 51 and the bottom plate 52. Both ends of the pressure strip 511 extend to the two side plates of the box body 5 and are connected to the side plates. When the battery module 33 is installed on the tray 53, the pressure strip 511 presses the other side of the battery module 33 to achieve stable installation. A gap is formed between the two pressure strips 511, and a panel base 512 is set between the two pressure strips 511 to fix and install the BMU / BMS panel 513.

[0072] It should be noted that the BMU / BMS panel 513 is used to set the battery management system BMU34 / BMS36. When installed, the BMU / BMS panel 513 is located on the side of the panel base 512 away from the battery module 33. The internal space of the box 5 can be compatible with hard-pack and soft-pack batteries of different specifications, such as 50Ah, 100Ah, 280Ah, and 314Ah. The box 5 structure style of the battery box formed by battery packs 3 of different specifications is consistent, thereby improving the standardization of the product and reducing the production cost and the time required for structural design and testing.

[0073] In some embodiments, the inner walls of the top plate 51 and the bottom plate 52 of the battery box are respectively provided with limit members 521, and the limit members 521 are located between the tray 53 and the pressure strip 511, and the battery module 33 abuts against the two limit members 521 to limit the position.

[0074] like Figure 7 As shown, the limiter 521 is made of channel steel and buckled on the inner wall of the relative position of the top plate 51 and the bottom plate 52, which is used to limit the left and right sides of the battery module 33 to prevent the battery module 33 from shaking left and right in the box 5. The limiter 521, the tray 53 and the pressure strip 511 form an all-round limit for the battery module 33. The limiter 521 is detachably connected to the top plate 51 and the bottom plate 52, so that the limiter 521 can be replaced according to the size of the battery module 33. The limiter 521 is extended along both sides of the box 5 to support and limit the battery module 33 as much as possible.

[0075] In some embodiments, fixed blocks 514 are respectively provided on the two side panels of the box body 5, and the two ends of the pressure strip 511 are respectively fixedly supported on the two relatively arranged fixed blocks 514. The pressure strip 511 is provided with a wiring hole, and the power line and communication line of the battery pack 3 are arranged along the pressure strip 511 and passed through the wiring hole.

[0076] like Figure 5As shown, the fixing blocks 514 are connected to the two side panels of the box body 5 by bolts, the fixing blocks 514 on the two side panels are arranged opposite to each other, and the two ends of the pressure strip 511 are respectively fixedly supported on the fixing blocks 514, so as to realize the detachable connection between the pressure strip 511 and the box body 5. The strip plate of the pressure strip 511 has the function of guiding and fixing the power line and the communication line, so as to realize the storage and direction setting of the power line and the communication line in the box body 5.

[0077] In some embodiments, the outer walls of the top plate 51 and the bottom plate 52 of the battery box are respectively provided with a positioning protrusion 515 and a positioning groove (not shown in the figure), and the positioning groove of the battery box stacked above cooperates with the positioning protrusion 515 of the battery box below for positioning and assembly.

[0078] like Figure 5 As shown, the positioning protrusion 515 and the quick-plug terminal male head 31 are arranged on the top plate 51 at intervals. A plurality of positioning protrusions 515 can be provided. When the two boxes 5 are combined, the positioning protrusion 515 is conducive to the positioning of the two boxes 5, realizing multi-point fixation and precise positioning, reducing the problem of easy misalignment due to single-point fixed installation. The matching structure of the positioning protrusion 515 and the quick-plug terminal male head 31 can assist in determining the assembly direction and improve assembly efficiency. The positioning protrusion 515 cooperates with the positioning groove, and the positioning protrusion 515 can be fully inserted into the positioning groove, so that the top plate 51 and the bottom plate 52 of the two boxes 5 fit each other. The positioning protrusion 515 and the quick-plug terminal male head 3131 are both protruding from the surface of the top plate 51. By setting the protruding height, the displacement between adjacent battery boxes can be avoided, and the battery box can be prevented from tipping over.

[0079] A plurality of connecting pieces 55 are also arranged outside the box body 5, such as Figure 8 and Fig.10 The connecting piece 55 is connected between two adjacent boxes 5 , the box 5 and the base 1 , and the box 5 and the high-voltage control box 4 .

[0080] A plurality of connecting pieces 55 are arranged at the side positions on the left and right sides, which can increase the connection stability between the boxes 5, between the boxes 5 and the base 1, and between the boxes 5 and the high-voltage control box 4, and prevent the box assembly from tipping over. On the premise that the size of the box 5 meets the anti-tip design, the size of the connecting piece 55 can be appropriately reduced.

[0081] It is additionally noted that if Fig. 9 A fixing device 542 is provided on the outer side of the rear cover plate 54 of the battery box. Generally, the fixing device 542 is arranged on the back side of the high-voltage control box 4 or the back side of the battery box body 5 at the top, and is used for hanging or assembling on a fixed facility such as a wall.

[0082] like Fig. 9As shown, a pressure relief port 541 is provided on the back of each battery box to avoid lateral or forward injuries to people and to prevent gas from spraying out from the position of the quick-plug terminal male connector 31 on the top to affect the stability of the battery box stacking structure. The pressure relief method adopts a combination of active and passive methods. A pressure relief valve is provided at the pressure relief port 541. The pressure relief valve is provided with a power preset value. When the internal pressure of the battery box reaches the preset value, the pressure relief valve is mechanically pushed to release the pressure in time. The pressure relief valve adopts a one-way valve. The BMS36 or PCU21 can open the pressure relief valve in time according to the data fed back by the internal sensor.

[0083] A gas sensor is arranged inside each battery box near the pressure relief port 541 of the battery pack 3. The gas sensor is connected to the BMS36 / BMU34 for communication and performs power-off control when the data is abnormal.

[0084] A fire-fighting module is arranged in the battery box. The fire-fighting module adopts a PACK-level fire-fighting module and is arranged on the top of the battery module 33. An insulation layer is arranged on the top of the fire-fighting module to prevent thermal runaway from affecting adjacent battery boxes. The fire-fighting module adopts a pulse aerosol fire-fighting solution. When the thermal runaway temperature exceeds 170°C or an open flame occurs, no control signal is required and protection is automatically performed.

[0085] It should be noted that, for the battery pack 3 connected in parallel, Figure 6 It includes a second DC / DC module 35, which needs to be equipped with a heat sink 351 to match it. For large-capacity battery cells (such as 100Ah, 280Ah, 314Ah), the second DC / DC module 35 is used to achieve boosting, and for small-capacity battery cells (such as 50Ah), there is no second DC / DC module 35.

[0086] In this embodiment, the radiator 351 and the second DC / DC module 35 are separately arranged on the outer wall and inner wall of the same side panel, and the inner wall of the side panel is coated with thermal conductive adhesive to promote heat conduction, which is beneficial for the radiator 351 to discharge the heat of the second DC / DC module 35 as soon as possible to achieve heat dissipation. The external radiator 351 can be used to determine whether the battery box is a battery pack 3 in parallel mode, thereby avoiding the incorrect mixing of battery boxes in series mode and parallel mode.

[0087] Heat-insulating and fire-proof cotton is arranged between the second DC / DC module 35 and the battery module 33 to avoid affecting the temperature of the internal battery cells.

[0088] In this embodiment, an axial fan is further provided inside the battery box. The axial fan is arranged on one side of the battery box to dissipate heat from the bottom to the top of the heat sink, thereby further improving the heat dissipation effect.

[0089] Embodiment three:

[0090] like Figure 3 and Figure 4In this embodiment, the household battery module also includes a heating module 7, and the heating module 7 is arranged in close contact with the battery pack 3.

[0091] In this embodiment, the heating module 7 preferably adopts a graphene heating sheet, which is arranged on the side of the battery module 33 to uniformly heat the side of the battery module 33.

[0092] It should be noted that the heating module 7 draws power from the first DC / DC module 22 or the second DC / DC module 35, or draws power from an external device through the high-voltage control box 4, so as to avoid drawing power from the inside of the battery module 33 to affect the power balance of the battery module 33.

[0093] like Figure 3 As shown, when the battery pack 3 is connected in series, a port E is added to the quick-plug terminal male head 31 and the quick-plug terminal female head 32 of the battery pack 3 respectively, and the two ports E are respectively connected to the two ends of the heating module 7, and the port A, port D and port E of the base quick-plug terminal male head 11 in the base 1 are connected and conductive, and the port E of the top quick-plug terminal female head 23 in the controller 2 is connected to the first DC / DC module 22, and a switch K1 is connected in series on the power line between the heating module 7 and the first DC / DC module 22. The switch K1 opens and closes according to the instruction of the PCU 21, thereby controlling the start and stop of the heating of the heating module 7.

[0094] like Figure 4 As shown, when the battery pack 3 is connected in parallel, the two ends of the heating module 7 are electrically connected to the second DC / DC module 35, and power is supplied to the heating module 7 by taking power from an external photovoltaic or power grid through the positive and negative busbars of the power line and the inverter PCS.

[0095] In some embodiments, a heat conducting plate may be arranged in the middle of the battery module 33 to transfer heat to the front and back sides of the battery module 33 to achieve uniform heating. The heat conducting plate may be made of anisotropic nanomaterials, which have low temperature conductivity in short distances and high temperature conductivity in plane directions.

[0096] Embodiment 4:

[0097] It should be noted that the plug-in assembly method is not limited to household energy storage split machines and household energy storage integrated machines. In the series model of household energy storage split machine products, the secondary control unit PCU21, the first DC / DC module 22 and the fuse of the battery management system are assembled in the high-voltage control box 4. The external terminal 24 of the high-voltage control box 4 leads out the power line to connect with the external energy storage inverter to complete the power transmission with the external photovoltaic components and grid; in the parallel mode split machine, each battery box is respectively configured with BMS36, and BMS36 independently controls each battery module 33. The high-voltage control box 4 is configured with an external terminal 24 for communication connection of BMS36, and the communication connection with the external device is realized through the external terminal 24.

[0098] Fig.12 and Fig.13 As shown, the household energy storage integrated machine is also equipped with an energy management system EMS and an inverter PCS. The energy management system EMS and the inverter PCS are integrated in the energy management unit 6 and are separately assembled in a box 5 during assembly. At this time, the energy management unit 6 has an external connection terminal and a quick-plug terminal female head 32, and the high-voltage control box 4 is provided with a quick-plug terminal male head 31 and a top quick-plug terminal female head 23. The quick-plug terminal female head 32 of the energy management unit 6 is adapted to the quick-plug terminal male head 31 of the high-voltage control box 4 to perform power and communication connections, and the inverter PCS performs power conversion to charge and discharge the battery, and exchanges data with remote devices through the EMS.

[0099] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Household battery module, characterized in that: The invention comprises a base (1), a controller (2) and a battery pack (3) connected in series or in parallel between the base (1) and the controller (2), each of the battery packs (3) being provided with a quick-plug terminal male head (31) and a quick-plug terminal female head (32), the quick-plug terminal male head (31) and the quick-plug terminal female head (32) both comprising a power port and a communication port, wherein the power port is used to lead out a power line to connect the positive / negative terminal of the battery pack (3), and the communication port is used to lead out a communication line to connect the battery pack (3), and the quick-plug terminal male head (31) of one battery pack (3) and the quick-plug terminal female head (32) of another battery pack (3) are plugged together to realize series connection or parallel connection.

2. The household battery module according to claim 1, characterized in that: When a plurality of the battery packs (3) are connected in series, the battery pack (3) comprises a battery module (33) and a BMU (34); one power port of the quick-plug terminal male head (31) and one power port of the quick-plug terminal female head (32) are respectively connected to the positive electrode and the negative electrode of the battery pack (3); the other power ports of the quick-plug terminal male head (31) and the quick-plug terminal female head (32) are connected via a power line; and two ends of the BMU (34) are respectively connected to the communication ports of the quick-plug terminal male head (31) and the quick-plug terminal female head (32).

3. The household battery module according to claim 2, characterized in that: The base (1) is provided with a base quick-plug terminal male head (11), and two power ports of the base quick-plug terminal male head (11) are connected via a power line for conduction.

4. The household battery module according to claim 2, characterized in that: The controller (2) comprises a PCU (21) and a first DC / DC module (22). The controller (2) has a top quick-plug terminal female head (23) and an external terminal (24). The two power ports of the top quick-plug terminal female head (23) are respectively connected to the positive and negative busbars of the power line to the first DC / DC module (22), and the first DC / DC module (22) is also connected to the external terminal (24) through the power line for power transmission with an external device. The top quick-plug terminal female head (23) is also connected to a communication line to the PCU (21), and the PCU (21) is connected to the external device for communication through the communication port of the external terminal (24).

5. The household battery module according to claim 1, characterized in that: When a plurality of the battery packs (3) are connected in parallel, the battery pack (3) comprises a battery module (33), a BMS (36) and a second DC / DC module (35); the two power ports of the male quick-plug terminal (31) are respectively connected to the two power ports of the female quick-plug terminal (32) via two power lines; the positive electrode and the negative electrode of the battery pack (3) are respectively connected to the two power lines via the second DC / DC module (35); the communication port of the male quick-plug terminal (31) is communicatively connected to the communication port of the female quick-plug terminal (32), and is also communicatively connected to the BMS (36).

6. The household battery module according to claim 5, characterized in that: The controller (2) comprises a top quick-plug terminal female head (23) and an external terminal (24); the top quick-plug terminal female head (23) is plugged into the quick-plug terminal male head (31) of the battery pack (3) stacked on the top; two power ports of the top quick-plug terminal female head (23) are respectively connected to two power ports of the external terminal (24) via two power lines; and a communication port of the top quick-plug terminal female head (23) is communicatively connected to a communication port of the external terminal (24).

7. The household battery module according to any one of claims 1 to 6, characterized in that: The household battery module further comprises a heating module (7), wherein the heating module (7) is arranged in close contact with the battery pack (3), and the heating module (7) draws power from the battery pack (3) or the controller (2).

8. A battery box assembly, characterized in that: The invention comprises a base (1), a high-voltage control box (4) and a plurality of battery boxes stacked between the base (1) and the high-voltage control box (4), wherein the battery box comprises a box body (5), wherein a battery pack (3) of a household battery module according to any one of claims 1 to 7 is arranged in the box body (5), and a boss hole and a groove hole are respectively arranged on the top plate (51) and the bottom plate (52) of the box body (5), and a male quick-plug terminal (31) and a female quick-plug terminal (32) of each battery pack (3) are respectively installed in the boss hole and the groove hole, and when any two of the battery boxes are stacked, the boss hole of one of the battery boxes is aligned with the boss hole of the other battery box. The groove holes cooperate with each other to plug in so that the battery packs (3) inside the two battery boxes are connected in series or in parallel; the outer walls of the top plate (51) and the bottom plate (52) of the battery box are respectively provided with a positioning protrusion (515) and a positioning groove, and the positioning groove of the battery box superimposed on the upper side cooperates with the positioning protrusion (515) on the battery box below to position and assemble; a plurality of connecting pieces (55) are also arranged on the outside of the box body (5), and the connecting pieces (55) are connected to the two adjacent boxes (5), to the box body (5) and the base (1), and to the box body (5) and the high-voltage control box (4).

9. The battery box assembly according to claim 8, characterized in that: The inner wall of the front cover of the battery box is provided with a tray (53), the battery module (33) is fixedly mounted on the tray (53), and a pressure strip (511) is provided in the battery box, and the pressure strip (511) is pressed against the battery module (33); fixed blocks (514) are respectively provided on the two side panels of the box body (5), and the two ends of the pressure strip (511) are respectively fixedly supported on two oppositely arranged fixed blocks (514), and a wiring hole is provided on the pressure strip (511), and the power line and communication line of the battery pack (3) are arranged along the pressure strip (511) and passed through the wiring hole; a BMU (34) / BMS (36) is arranged on the side of the pressure strip (511) away from the battery module (33).

10. The battery box assembly according to claim 9, characterized in that: Limiting members (521) are also provided on the inner walls of the top plate (51) and the bottom plate (52) of the battery box, respectively. The limiting members (521) are located between the tray (53) and the pressure strip (511). The battery module (33) abuts against the two limiting members (521) to limit the position.

11. The battery box assembly according to claim 8, characterized in that: The inner wall and outer wall of a side plate of the box body (5) are respectively provided with a second DC / DC module (35) and a heat sink (351), and the inner wall of the side plate is coated with heat-conducting glue.

Images