Household energy storage system

Abstract

The utility model belongs to the field of energy storage devices, and particularly relates to a household energy storage system, which comprises a shell, a battery module, a first output terminal, a second output terminal, a first fuse and a second fuse, and is characterized in that the battery module is arranged in the shell, and the first fuse, the second fuse, the first output terminal and the second output terminal are arranged on the shell; the first fuse is provided with a first connecting end and a second connecting end, and the second fuse is provided with a first connecting part and a second connecting part; the first connecting end is electrically connected with the positive electrode of the battery module, the second connecting end is electrically connected with the first output terminal, the first connecting part is electrically connected with the negative electrode of the battery module, and the first connecting part is electrically connected with the second output terminal. When the battery module works normally, the first fuse and the second fuse are not fused, and the battery module is connected with external equipment through the first output terminal and the second output terminal to supply power; and after abnormal work, the first fuse and the second fuse are fused to protect the battery module and the whole circuit.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and in particular relates to a household energy storage system. Background Art

[0002] Lithium batteries are environmentally friendly, rechargeable, and consistent with sustainable development strategies. In this environment, the research and development and production of lithium batteries have become a new growth point for the industry, driving the continued rapid growth of the global lithium battery industry.

[0003] Home energy storage is a new energy solution based on high-efficiency lithium iron phosphate batteries. It can power homes in daily life and provide backup power during power outages or emergencies. Through intelligent control systems, home energy storage can store clean energy such as solar, wind, and hydropower, enabling the utilization of renewable energy and saving energy costs for households.

[0004] Existing household energy storage lithium battery modules are not equipped with relevant safety protection measures, and there are safety hazards during daily use. Utility Model Content

[0005] The technical problem to be solved by the present invention is: to provide a household energy storage system in view of the problem that the existing household energy storage lithium battery modules are not provided with relevant safety protection measures and there are potential safety hazards during daily use.

[0006] To solve the above technical problems, an embodiment of the present utility model provides a household energy storage system, comprising a housing, a battery module, a first output terminal, a second output terminal, a first fuse, and a second fuse, wherein the battery module is disposed in the housing, and the first fuse, the second fuse, the first output terminal, and the second output terminal are disposed on the housing;

[0007] The first fuse has a first connection end and a second connection end, and the second fuse has a first connection portion and a second connection portion;

[0008] The first connection end is electrically connected to the positive electrode of the battery module, the second connection end is electrically connected to the first output terminal, the first connection portion is electrically connected to the negative electrode of the battery module, and the first connection portion is electrically connected to the second output terminal.

[0009] Optionally, the first fuse is a fuse, and the second fuse is an air switch.

[0010] Optionally, it also includes a fixing frame, and the shell includes an upper shell, a lower shell and a panel; the fixing frame is used to connect the battery module and the lower shell, the upper shell, the lower shell and the panel are interconnected to enclose a accommodating cavity, the battery module is placed in the accommodating cavity, the second fuse is installed on the panel, the first fuse is installed on the inner side wall of the lower shell, and the first output terminal and the second output terminal are both installed on the panel.

[0011] Optionally, a control module is further included, and the control module is electrically connected to the first fuse, the second fuse and the battery module respectively.

[0012] Optionally, the battery module includes a positive electrode connector, a negative electrode connector and a battery cell group, the positive electrode connector connects the positive electrode of the battery module with the first connection end, and the negative electrode connector connects the negative electrode of the battery module with the second connection end.

[0013] Optionally, the battery module includes a conductive connector, a plurality of the battery cell groups are provided, and adjacent battery cell groups are electrically connected via the conductive connector.

[0014] Optionally, the battery cell group includes a plurality of spacers, a plurality of electrical connectors and a plurality of battery cells;

[0015] The plurality of battery cells are arranged along a first direction, the spacer is provided between two adjacent battery cells, and the electrical connector is connected between adjacent battery cells to achieve series connection of the plurality of battery cells.

[0016] Optionally, the battery cell group further includes a first end plate, a second end plate, a first side fixing plate, a second side fixing plate and a pressure strip, wherein the first end plate and the second end plate are respectively arranged at both ends of the first direction, and the first end plate and the second end plate sandwich the plurality of battery cells;

[0017] The first side fixing plate and the second side fixing plate are arranged at both ends in the second direction, the two sides of the first side fixing plate in the first direction are respectively connected to the first end plate and the second end plate, the two sides of the second side fixing plate in the first direction are respectively connected to the first end plate and the second end plate, the bottom of the first side fixing plate is bent toward the center of the bottom wall of the battery cell group, and the bottom of the second side fixing plate is bent toward the center of the bottom wall of the battery cell group, and the first end plate, the second end plate, the first side fixing plate, and the second side fixing plate enclose an accommodating cavity for placing the battery cell group;

[0018] The two ends of the pressure strip are respectively connected to the first end plate and the second end plate, and the pressure strip is arranged above the battery cell group;

[0019] The pressure strip is provided with a wire groove, and the wire groove extends along the first direction;

[0020] There is a non-zero angle between the first direction and the second direction.

[0021] Optionally, the battery module further includes a first foam and a second foam, wherein the first foam is arranged between the battery cell group and the first end plate, and the second foam is arranged between the battery cell group and the second end plate.

[0022] Optionally, the battery module further includes an insulating layer, which is arranged between the battery cell group and the upper shell, and extends along the arrangement direction of the multiple battery cells.

[0023] According to the household energy storage system of the embodiment of the present invention, during normal operation, the first fuse and the second fuse are not blown, and the positive and negative electrodes of the battery module are connected to the external device through the first output terminal and the second output terminal to supply power to the external device; however, when an abnormality occurs in the household energy storage system, the first fuse arranged between the positive electrode of the battery module and the first output terminal and the second fuse arranged between the negative electrode of the positive module and the second output terminal are blown, thereby disconnecting the entire circuit, thereby protecting the battery module and the entire circuit in the first time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of a household energy storage system provided by one embodiment of the present utility model;

[0025] Figure 2 An explosion diagram of a household energy storage system provided by one embodiment of the present utility model;

[0026] Figure 3 An overall schematic diagram of a battery module of a household energy storage system provided by one embodiment of the present utility model;

[0027] Figure 4 An exploded diagram of a battery module of a household energy storage system provided by one embodiment of the present utility model;

[0028] Figure 5 An exploded schematic diagram of a battery pack of a household energy storage system provided by one embodiment of the present utility model;

[0029] Figure 6 This is a circuit diagram of a household energy storage system provided in one embodiment of the present invention.

[0030] The accompanying drawings in the specification are as follows: 1. battery module; 11. battery cell group; 111. battery cell; 112. spacer; 113. electrical connector; 114. first end plate; 115. second end plate; 116. first side fixing plate; 117. second side fixing plate; 118. pressure strip; 119. wire trough; 12. positive electrode connector; 13. negative electrode connector; 14. conductive connector; 15. first foam; 16. second foam; 17. insulating layer; 2. first output terminal; 3. second output terminal; 4. first fuse; 5. second fuse; 61. upper shell; 62. lower shell; 63. panel; 64. fixing bracket; 7. control module; 81. CAN communication interface; 82. communication debugging port; 83. display light; 91. insulating seat. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1 and Figure 2 As shown, and refer to Figure 6 One embodiment of the present invention provides a household energy storage system, comprising a housing, a battery module 1, a first output terminal 2, a second output terminal 3, a first fuse 4, and a second fuse 5. The battery module 1 is disposed within the housing, and the first fuse 4, the second fuse 5, the first output terminal 2, and the second output terminal 3 are disposed on the housing. The first fuse 4 has a first connection end and a second connection end, and the second fuse 5 has a first connection portion and a second connection portion. The first connection end is electrically connected to the positive electrode of the battery module 1, the second connection end is electrically connected to the first output terminal 2, the first connection portion is electrically connected to the negative electrode of the battery module 1, and the first connection portion is electrically connected to the second output terminal 3.

[0033] When the household energy storage system of this embodiment is operating normally, the first fuse 4 and the second fuse 5 are not blown, and the positive and negative electrodes of the battery module 1 are connected to the external device through the first output terminal 2 and the second output terminal 3 to supply power to the external device. However, when an abnormality occurs in the household energy storage system, the first fuse 4 arranged between the positive electrode of the battery module 1 and the first output terminal 2 and the second fuse 5 arranged between the negative electrode of the positive electrode module and the second output terminal 3 are blown, thereby disconnecting the entire circuit, thereby protecting the battery module 1 and the entire circuit in the first time.

[0034] As an example, the first fuse 4 is a fuse, and the second fuse 5 is an air switch. In this embodiment, the fuse melts when heated, providing circuit breaker protection against heat generation due to excessive current or short circuits. If the actual current exceeds the rated current, the air switch trips. The first fuse 4 and the second fuse 5 provide comprehensive protection for the home energy storage system from two different perspectives.

[0035] Reference Figure 2 As an example, a household energy storage system includes a fixing frame 64, an upper shell 61, a lower shell 62, and a panel 63. The fixing frame 64 is connected to the battery module 1 and the lower shell 62 respectively to connect the battery module 1 to the lower shell 62. The upper shell 61, the lower shell 62, and the panel 63 are interconnected to form a receiving cavity. The battery module 1 is placed in the receiving cavity. The second fuse 5 is mounted on the panel 63, the first fuse 4 is mounted on the lower shell 62, and the first output terminal 2 and the second output terminal 3 are both mounted on the panel 63. The household energy storage system in this embodiment is rectangular, so the lower shell 62 has a bottom wall and three side walls, so that the lower shell 62 has an upper opening and a side opening. The upper shell 61 and the lower shell 62 are connected to close the upper opening of the lower shell 62. The panel 63 is connected to the upper shell 61 and the lower shell 62 respectively to close the side opening of the lower shell 62, thereby forming a receiving cavity. In this embodiment, the upper shell 61, the lower shell 62, and the panel 63 are connected to each other by screws.

[0036] As an example, the upper shell 61 , the lower shell 62 and the panel 63 are all made of SPCC material.

[0037] In this embodiment, a plurality of threaded holes are provided on the fixing frame 64 , and the fixing frame 64 is connected to the battery module 1 by screws, and is also connected to the lower shell 62 by screws, so that the battery module 1 is stably arranged in the accommodating cavity.

[0038] In this embodiment, the household energy storage system further includes a control module 7 . Specifically, the control module 7 is a BMS module. The control module 7 is electrically connected to the first fuse 4 , the second fuse 5 and the battery module 1 , respectively.

[0039] Reference Figure 1 Panel 63 also includes a communication debugging port 82, a CAN communication interface, and a display light 83. These ports, CAN communication interface, and display light 83 are electrically connected to the BMS module. In this embodiment, the air switch, communication debugging port 82, CAN communication interface, and display light 83 are centrally located on panel 63 for easy access.

[0040] Reference Figure 2 and Figure 3In this embodiment, the positive connector 12, negative connector 13, conductive connector 14, and cell group 11 are provided. The positive connector 12 connects the positive electrode of the battery module 1 to the first connection terminal, and the negative connector 13 connects the negative electrode of the battery module 1 to the second connection terminal. The positive connector 1212 includes two copper bars, the shapes of which vary according to the layout of the accommodating cavity. In this embodiment, the two copper bars serving as the positive connector 12 have different shapes. The battery module 1 includes a conductive connector 14. There are multiple cell groups 11 provided. Adjacent cell groups 11 are electrically connected via the conductive connector 14. In this embodiment, there are two cell groups 11. Two copper bars serving as positive connectors 12 are connected to both ends of the first fuse 4. One of the copper bars serving as the positive connector 12 has its end away from the first fuse 4 connected to the first output terminal 2, and the other copper bar serving as the positive connector 12 has its end away from the first fuse 4 connected to the positive electrode of the battery module 1. The conductive connector 14 is a conductive metal member. In this embodiment, the conductive connector 14 is made of copper. The negative electrode connector 13 includes two wiring harnesses, and the two ends of the second fuse 5 are connected to the two wiring harnesses respectively. One end of the wiring harness of the negative electrode connector 13, which is away from the second fuse 5, is connected to the second output terminal 3, and the other end of the wiring harness of the negative electrode connector 13, which is away from the second fuse 5, is connected to the negative electrode of the battery module 1.

[0041] In this embodiment, the positive electrode connector 12 is connected to the positive electrode of the battery cell group 11 via a copper sheet, and the negative electrode connector 13 is also connected to the negative electrode of the battery cell group 11 via a copper sheet. In other embodiments, the positive electrode connector 12 is directly connected to the positive electrode of the battery cell group 11, and the negative electrode connector 13 is directly connected to the negative electrode of the battery cell group 11.

[0042] Reference Figure 4 and Figure 5 As an example, the battery cell group 11 includes a plurality of spacers 112, a plurality of electrical connectors 113, and a plurality of battery cells 111. The plurality of battery cells 111 are arranged along a first direction, with the spacers 112 disposed between two adjacent battery cells 111. The plurality of battery cells 111 are connected in series via the plurality of electrical connectors 113. Specifically, the negative electrode of one battery cell 111 is connected to the positive electrode of an adjacent battery cell 111 via the electrical connector 113 to achieve series connection. After the plurality of battery cells 111 are connected in series via the electrical connector 113, the battery cell group 11 is formed.

[0043] As an example, the battery cell group 11 further includes a first end plate 114 , a second end plate 115 , a first side fixing plate 116 , a second side fixing plate 117 and a pressure bar 118 . The first end plate 114 and the second end plate 115 are respectively arranged at both ends of the first direction.

[0044] The first side fixing plate 116 and the second side fixing plate 117 are at both ends of the second direction of the battery cell group 11. The two sides of the first side fixing plate 116 in the first direction are respectively connected to the first end plate 114 and the second end plate 115. The two sides of the second side fixing plate 117 in the first direction are respectively connected to the first end plate 114 and the second end plate 115. The bottom of the first side fixing plate 116 is bent toward the center of the bottom wall of the battery cell group 11, and the bottom of the second side fixing plate 117 is bent toward the center of the bottom wall of the battery cell group 11. The first end plate 114, the second end plate 115, the first side fixing plate 116, and the second side fixing plate 117 enclose a receiving cavity for placing the battery cell group 11. In this embodiment, the bottom walls of the first side fixing plate 116 and the second side fixing plate 117 both extend toward the bottom wall of the battery cell group 11, and the extension length is adjusted according to actual needs. The battery cell 111 is placed into the receiving cavity from the upper opening of the receiving cavity.

[0045] Two ends of the holding strip 118 are respectively connected to the first end plate 114 and the second end plate 115 . The holding strip 118 is disposed above the battery cell group 11 and in the middle of the two battery cell groups 11 .

[0046] Reference Figure 4 As an example, the holding strip 118 is provided with a wire groove 119 that extends along the arrangement direction of the multiple battery cells 111. The holding strip 118 is a sheet metal part that is bent to form the wire groove 119. The ends of the holding strip 118 are connected to the first end plate 114 and the second end plate 115 respectively by screws. The wire groove 119 is used to allow wires to pass through it.

[0047] Reference Figure 4 and Figure 5 As an example, the battery module 1 further includes a first foam 15 and a second foam 16. The first foam 15 is disposed between the battery cell group 11 and the first end plate 114, and the second foam 16 is disposed between the battery cell group 11 and the second end plate 115. The first foam 15 can reduce friction and collision between the battery cell 111 and the first end plate 114, thereby providing a buffering effect.

[0048] As an example, the battery module 1 further includes an insulating layer 17, which is disposed between the battery cells 111 and the upper shell 61. The insulating layer 17 extends along the arrangement direction of the multiple battery cells 111. In this embodiment, the insulating layer 17 may be insulating paper, which is directly bonded to the conductive connector 14 and the electrical connector 113. The function of the insulating layer 17 is to insulate and protect the upper shell 61 and the battery cells 111.

[0049] In this embodiment, an insulating seat 91 is fixed to the first end plate 114 and the second end plate 115, respectively. The insulating seat 91 on the first end plate 114 is arranged below the positive electrode connector 12, and provides insulation protection for the positive electrode connector 12 and the first end plate 114, and also provides insulation protection for the panel 63 and the positive electrode connector 12. Similarly, the insulating seat 91 on the second end plate 115 is arranged below the negative electrode connector 13, and provides insulation protection for the negative electrode connector 13 and the second end plate 115, and also provides insulation protection for the lower shell 62 and the negative electrode connector 13.

[0050] In other embodiments, the first fuse 4 and the second fuse 5 are both fuses.

[0051] In other embodiments, the first fuse 4 and the second fuse 5 are both air switches.

[0052] In other embodiments, the positive electrode connector, the negative electrode connector, and the battery cell group, or only one battery cell group may be provided. In an embodiment with only one battery cell group, the conductive connector is not required.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A household energy storage system, characterized in that: The battery module comprises a housing, a battery module, a first output terminal, a second output terminal, a first fuse, and a second fuse, wherein the battery module is arranged in the housing, and the first fuse, the second fuse, the first output terminal, and the second output terminal are arranged on the housing; The first fuse has a first connection end and a second connection end, and the second fuse has a first connection portion and a second connection portion; The first connection end is electrically connected to the positive electrode of the battery module, the second connection end is electrically connected to the first output terminal, the first connection portion is electrically connected to the negative electrode of the battery module, and the first connection portion is electrically connected to the second output terminal.

2. The household energy storage system according to claim 1, characterized in that: The first fuse is a fuse, and the second fuse is an air switch.

3. The household energy storage system according to claim 1, characterized in that: The battery module further comprises a fixing frame, wherein the shell comprises an upper shell, a lower shell and a panel; the fixing frame is used to connect the battery module and the lower shell, the upper shell, the lower shell and the panel are interconnected to enclose a receiving cavity, the battery module is placed in the receiving cavity, the second fuse is mounted on the panel, the first fuse is mounted on the inner side wall of the lower shell, and the first output terminal and the second output terminal are both mounted on the panel.

4. The household energy storage system according to claim 1, characterized in that: It also includes a control module, which is electrically connected to the first fuse, the second fuse and the battery module respectively.

5. The household energy storage system according to claim 3, characterized in that: The battery module includes a positive electrode connector, a negative electrode connector and a battery cell group. The positive electrode connector connects the positive electrode of the battery module to the first connection end, and the negative electrode connector connects the negative electrode of the battery module to the second connection end.

6. The household energy storage system according to claim 5, characterized in that: The battery module includes a conductive connector, a plurality of battery cell groups are provided, and adjacent battery cell groups are electrically connected via the conductive connector.

7. The household energy storage system according to claim 5, characterized in that: The battery cell group includes a plurality of spacers, a plurality of electrical connectors and a plurality of battery cells; The plurality of battery cells are arranged along a first direction, the spacer is provided between two adjacent battery cells, and the electrical connector is connected between adjacent battery cells to achieve series connection of the plurality of battery cells.

8. The household energy storage system according to claim 7, characterized in that: The battery cell group further includes a first end plate, a second end plate, a first side fixing plate, a second side fixing plate and a pressure strip, wherein the first end plate and the second end plate are respectively arranged at both ends of the first direction, and the first end plate and the second end plate sandwich a plurality of the battery cells; The first side fixing plate and the second side fixing plate are arranged at both ends in the second direction, the two sides of the first side fixing plate in the first direction are respectively connected to the first end plate and the second end plate, the two sides of the second side fixing plate in the first direction are respectively connected to the first end plate and the second end plate, the bottom of the first side fixing plate is bent toward the center of the bottom wall of the battery cell group, and the bottom of the second side fixing plate is bent toward the center of the bottom wall of the battery cell group, and the first end plate, the second end plate, the first side fixing plate, and the second side fixing plate enclose an accommodating cavity for placing the battery cell group; The two ends of the pressure strip are respectively connected to the first end plate and the second end plate, and the pressure strip is arranged above the battery cell group; The pressure strip is provided with a wire groove, and the wire groove extends along the first direction; There is a non-zero angle between the first direction and the second direction.

9. The household energy storage system according to claim 8, characterized in that: The battery module further includes a first foam and a second foam, wherein the first foam is disposed between the battery cell group and the first end plate, and the second foam is disposed between the battery cell group and the second end plate.

10. The household energy storage system according to claim 5, characterized in that: The battery module further includes an insulating layer, which is disposed between the battery cell group and the upper shell and extends along an arrangement direction of the plurality of battery cells.

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