Energy storage battery pack

Abstract

The utility model belongs to the field of energy storage technology, and discloses a household energy storage battery pack, comprising a box body, wherein the box body comprises a first L-shaped profile, a second L-shaped profile, two sealing plates and a top cover, wherein the first L-shaped profile and the second L-shaped profile are connected to form a U-shaped frame, wherein the two sealing plates are respectively connected to the two ends of the length direction of the U-shaped frame, and the top cover is connected to the tops of the first L-shaped profile, the second L-shaped profile and the two sealing plates, wherein the first L-shaped profile, the second L-shaped profile, the two sealing plates and the top cover cooperate to form an accommodating space, wherein a cell assembly is placed in the accommodating space, and the first L-shaped profile and the second L-shaped profile are both provided with a heat conduction cavity; the heat conduction cavity expands the heat dissipation area, thereby improving the heat dissipation efficiency, and heat dissipation holes are provided to be correspondingly connected to the heat conduction cavity, so that a large amount of heat generated by a large-capacity cell during use can be timely discharged through the heat dissipation holes when no external heat dissipation conditions are provided, thereby avoiding accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to an energy storage battery pack. Background Art

[0002] Energy storage is a related field of carbon neutrality, and its development prospects are quite broad. As one of the most important links in decarbonization, energy storage has received more and more attention. Household energy storage battery packs, also known as home storage, are usually used in combination with household photovoltaics to increase the self-generation and self-use rate of photovoltaics. At present, household energy storage battery packs are mainly based on natural heat dissipation, and the compatible battery cells are basically small-capacity square battery cells. With the popularization of large-capacity battery cells, more and more manufacturers choose to install large-capacity battery cells in household energy storage battery packs, such as 280Ah or 314Ah square battery cells.

[0003] However, most of the existing household energy storage battery packs do not have external heat dissipation conditions, and the large amount of heat generated by large-capacity battery cells during use cannot be dissipated in time, which can easily cause accidents.

[0004] Therefore, a device is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a household energy storage battery pack with high heat dissipation efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A household energy storage battery pack includes a box body, wherein the box body includes a first L-shaped profile, a second L-shaped profile, two sealing plates and a top cover, wherein the first L-shaped profile and the second L-shaped profile are connected to form a U-shaped frame, wherein the two sealing plates are respectively connected to the two ends of the U-shaped frame in the length direction, wherein the top cover is connected to the first L-shaped profile, the second L-shaped profile and the top of the two sealing plates, wherein the first L-shaped profile, the second L-shaped profile, the two sealing plates and the top cover cooperate to form an accommodating space, wherein a cell assembly is placed in the accommodating space, wherein the first L-shaped profile and the second L-shaped profile are both provided with a heat conduction cavity, wherein the sealing plate is provided with a heat dissipation hole, and wherein the heat dissipation hole is correspondingly connected to the heat conduction cavity.

[0008] Preferably, the battery cell assembly is spaced apart from the first L-shaped profile and the second L-shaped profile, and a thermal conductive adhesive layer is filled in a gap between the battery cell assembly and the first L-shaped profile and in a gap between the battery cell assembly and the second L-shaped profile.

[0009] Preferably, the first L-shaped profile includes a first profile and a first bottom plate, the first profile is connected to the side of the first bottom plate away from the second L-shaped profile, the second L-shaped profile includes a second profile and a second bottom plate, the second profile is connected to the side of the second bottom plate away from the first L-shaped profile, the first bottom plate is welded to the second bottom plate, one of the closing plate bolts is connected to the first profile, the first bottom plate, the second profile and one end of the second bottom plate in the length direction, the other closing plate bolt is connected to the first profile, the first bottom plate, the second profile and the other end of the second bottom plate in the length direction, and the top cover bolt is connected to the first profile, one of the closing plates, the second profile and the top of the other closing plate.

[0010] Preferably, the first profile is provided with a plurality of first heat-conducting cavities along its length direction, and the second profile is provided with a plurality of second heat-conducting cavities along its length direction, and the first heat-conducting cavities and the second heat-conducting cavities correspond to the heat dissipation holes one by one, and the heat dissipation holes are connected to the corresponding first heat-conducting cavities and the second heat-conducting cavities.

[0011] Preferably, the box body further comprises a sealing ring, which is circumferentially fitted to the edge of the top cover, and the sealing ring is bolted to the top cover and the first profile, one of the closing plates, the second profile, and the other closing plate.

[0012] Preferably, the box body also includes two sealing gaskets, which are U-shaped and have multiple screw holes at intervals. The bolt passes through the screw holes of one of the closing plates and one of the sealing gaskets and is connected to the first profile, the first bottom plate, the second profile and one end of the second bottom plate in the length direction. The bolt passes through the screw holes of the other closing plate and the other sealing gasket and is connected to the first profile, the first bottom plate, the second profile and the second bottom plate in the length direction.

[0013] Preferably, a partition is provided in the box body, the partition abuts against the first profile and the second profile, the partition divides the accommodating space into a battery compartment and an electrical compartment, and the battery cell assembly is arranged in the battery compartment.

[0014] Preferably, the electrical compartment is provided with a heat sink for balancing heat flow, and the battery compartment is connected to the electrical compartment.

[0015] Preferably, a first engaging portion is provided on the top of the top cover, the first bottom plate and the second bottom plate cooperate to form a second engaging portion, and the first engaging portion is configured to be engaged with the second engaging portion.

[0016] Preferably, the household energy storage battery pack also includes a power module and a battery management module. The power module is arranged in the electrical compartment and bolted to the partition. The battery management module is arranged in the battery compartment and bolted to the first profile and / or the second profile.

[0017] Beneficial effects: The utility model provides a household energy storage battery pack, including a box body, the box body includes a first L-shaped profile, a second L-shaped profile, two sealing plates and a top cover, the first L-shaped profile and the second L-shaped profile are connected to form a U-shaped frame, the two sealing plates are respectively connected to the two ends of the U-shaped frame in the length direction, the top cover is connected to the first L-shaped profile, the second L-shaped profile and the top of the two sealing plates, the first L-shaped profile, the second L-shaped profile, the two sealing plates and the top cover cooperate to form an accommodating space, the battery cell assembly is placed in the accommodating space, the first L-shaped profile and the second L-shaped profile are both provided with a heat conduction cavity, the sealing plate is provided with a heat dissipation hole, and the heat dissipation hole is correspondingly connected to the heat conduction cavity; the heat dissipation area is expanded by the heat conduction cavity, thereby improving the heat dissipation efficiency, the heat dissipation holes are arranged to be correspondingly connected to the heat conduction cavity, and a large amount of heat generated by the large-capacity battery cell during use can be promptly discharged through the heat dissipation holes in the absence of external heat dissipation conditions, so as to avoid accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the household energy storage battery pack provided by the embodiment of the utility model Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the household energy storage battery pack provided by the embodiment of the utility model Figure 2 ;

[0020] Figure 3 It is a structural schematic diagram of a first L-shaped profile provided in an embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of a second L-shaped profile provided by the utility model;

[0022] Figure 5 It is a structural schematic diagram of the sealing plate provided by the utility model;

[0023] Figure 6 It is a partial structural schematic diagram of a household energy storage battery pack provided by an embodiment of the utility model.

[0024] In the figure:

[0025] 10. Battery cell assembly; 1. First L-shaped profile; 11. First profile; 111. First heat conduction cavity; 12. First bottom plate; 2. Second L-shaped profile; 21. Second profile; 211. Second heat conduction cavity; 22. Second bottom plate; 120. Second clamping part; 3. Sealing plate; 31. Heat dissipation hole; 4. Top cover; 41. First clamping part; 5. Sealing ring; 6. Sealing pad; 7. Partition; 8. Heat dissipation element; 9. Thermal conductive adhesive layer; a. Power module; b. Battery management module. DETAILED DESCRIPTION

[0026] The present invention is 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 the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] 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.

[0028] In the present utility model, 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.

[0029] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] The present embodiment provides a household energy storage battery pack with high heat dissipation efficiency. It can promptly dissipate a large amount of heat generated by large-capacity battery cells during use without external heat dissipation conditions, thereby avoiding accidents.

[0031] Specifically, see Figure 1-Figure 6 The household energy storage battery pack includes a box body, which includes a first L-shaped profile 1, a second L-shaped profile 2, two sealing plates 3 and a top cover 4. The first L-shaped profile 1, the second L-shaped profile 2, the two sealing plates 3 and the top cover 4 cooperate to form an accommodation space, and the battery cell assembly 10 is placed in the accommodation space. In this embodiment, the first L-shaped profile 1 and the second L-shaped profile 2 are provided. On the one hand, the structural feature of the first L-shaped profile 1 and the second L-shaped profile 2 is that they both have cavities inside. The cavities serve as heat conduction cavities to expand the heat dissipation area, thereby improving the heat dissipation efficiency. On the other hand, the profile plate itself has excellent thermal conductivity, which is beneficial to the heat dissipation of the battery cell assembly 10.

[0032] For further information, see Figure 3 and Figure 4 The first L-shaped profile 1 includes a first profile 11 and a first bottom plate 12, and the second L-shaped profile 2 includes a second profile 21 and a second bottom plate 22, wherein the first profile 11 is opposite to the second profile 21, and the first bottom plate 12 is connected to the side of the first profile 11 away from the second L-shaped profile 2, and the second bottom plate 22 is connected to the side of the second profile 21 away from the first L-shaped profile 1, and the first bottom plate 12 is welded to the second bottom plate 22 to form the bottom of the box, thereby forming a U-shaped frame. Preferably, friction welding is used, and the side of the first bottom plate 12 is welded to the side of the second bottom plate 22 to form a flat bottom of the box, which is convenient for placing the battery cell assembly 10 on the one hand, and improves the aesthetics on the other hand. Furthermore, one of the closing plates 3 is bolted to one end of the U-shaped frame in the length direction, that is, one end of the first profile 11, the first bottom plate 12, the second profile 21 and the second bottom plate 22 in the length direction, and the other closing plate 3 is bolted to the other end of the U-shaped frame in the length direction, that is, the other end of the first profile 11, the first bottom plate 12, the second profile 21 and the second bottom plate 22 in the length direction, and the top cover 4 is bolted to the first profile 11, one of the closing plates 3, the second profile 21 and the top of the other closing plate 3, thereby forming a accommodating space to accommodate the battery cell assembly 10 and other electrical components.

[0033] Optionally, both the first profile 11 and the second profile 21 are provided with mounting holes, and the mounting holes are provided to facilitate hanging and carrying of the household energy storage battery pack.

[0034] Preferably, the first profile 11 is provided with a plurality of first heat-conducting cavities 111 along its length direction, and the second profile 21 is provided with a plurality of second heat-conducting cavities 211 along its length direction. Correspondingly, the sealing plate 3 is provided with a plurality of heat-dissipating holes 31. The first heat-conducting cavities 111 and the second heat-conducting cavities 211 correspond to the heat-dissipating holes 31 one by one. The heat-dissipating holes 31 are connected to the corresponding first heat-conducting cavities 111 and the second heat-conducting cavities 211. The heat dissipated by the battery cell assembly 10 is transferred to the first heat-conducting cavity 111 and the second heat-conducting cavity 211 and can be dissipated through the heat-dissipating holes 31. During use, a large amount of heat generated by the large-capacity battery cell assembly 10 is timely discharged to avoid accidents and improve safety performance.

[0035] Optionally, to improve the waterproof and dustproof capabilities of household energy storage battery packs, on the one hand, please refer to Figure 6 The box body in this embodiment also includes a sealing ring 5. For example, the sealing ring 5 is circumferentially attached to the edge of the top cover 4, and the sealing ring 5 is bolted between the top cover 4 and the first profile 11, one of the sealing plates 3, the second profile 21, and the other sealing plate 3, thereby preventing moisture and dust from entering the accommodating space through the gaps between the top cover 4 and the first profile 11, the sealing plate 3, and the second profile 21.

[0036] On the other hand, the box body in the present embodiment also includes two sealing gaskets 6. Adaptively, each sealing gasket 6 is U-shaped, and each sealing gasket 6 is provided with a plurality of screw holes at intervals. During the assembly process, one of the sealing gaskets 6 is clamped between one of the closing plates 3, one end of the first L-shaped profile 1 in the length direction, and one end of the second L-shaped profile 2 in the length direction. Bolts are passed through the sealing plate 3 and the screw holes of the sealing gasket 6 and connected to the first profile 11, the first bottom plate 12, the second profile 21, and one end of the second bottom plate 22 in the length direction. Then, another sealing gasket 6 is clamped between another sealing plate 3, the other end of the first L-shaped profile 1 in the length direction, and the other end of the second L-shaped profile 2 in the length direction. Bolts are passed through the sealing plate 3 and the screw holes of the sealing gasket 6 and connected to the first profile 11, the first bottom plate 12, the second profile 21, and the other end of the second bottom plate 2 in the length direction. This arrangement can prevent moisture and dust from entering the accommodating space through the gaps between the sealing plate 3 and the first profile 11 , the first bottom plate 12 , the second profile 21 , and the second bottom plate 22 , thereby further improving the sealing degree of the box.

[0037] Preferably, a partition 7 is provided in the box body, and the partition 7 is abutted between the first profile 11 and the second profile 21, thereby dividing the accommodating space into a battery compartment and an electrical compartment. The battery cell assembly 10 is provided in the battery compartment, and the two ends of the battery cell assembly 10 in the length direction are respectively abutted against the partition 7 and one of the sealing plates 3, thereby preventing the battery cell assembly 10 from shaking in the battery compartment. Further preferably, the partition 7 is made of a profile plate, and due to the structural feature of the profile plate having a cavity inside, the heat dissipation area is further expanded and the heat dissipation efficiency is improved.

[0038] Furthermore, a heat sink 8 is provided in the electrical compartment, and the heat sink 8 is used to balance the heat flow. Adaptively, the top of the partition 7 is spaced from the sealing ring 5, so that the battery compartment is connected to the electrical compartment, and the heat in the battery compartment and the electrical compartment is balanced, so that the first heat conduction cavity 111 and the second heat conduction cavity 211 can dissipate heat evenly. Preferably, the heat sink 8 is a fan, and the heat sink 8 is bolted to one of the sealing plates 3 for easy disassembly and maintenance.

[0039] Optionally, the household energy storage battery pack provided in this embodiment also includes a power module a and a battery management module b. The power module a is arranged in the electrical compartment and bolted to the partition 7, and the battery management module b is arranged in the battery compartment and bolted to the first profile 11. In other feasible embodiments, the battery management module b can also be bolted to the second profile 21, or bolted to the first profile 11 and the second profile 21 at the same time.

[0040] Further, the battery cell assembly 10 is spaced between the first L-shaped profile 1 and the second L-shaped profile 2. Specifically, the battery cell assembly 10 is spaced between the first profile 11 and the second profile 21. The gap between the battery cell assembly 10 and the first profile 11 and the gap between the battery cell assembly 10 and the second profile 21 are filled with a thermally conductive adhesive layer 9, and the two ends of the thermally conductive adhesive layer 9 in the length direction are respectively abutted against the partition 7 and one of the sealing plates 3. Preferably, the thermally conductive adhesive layer 9 is formed by encapsulating the thermally conductive adhesive, and the thermally conductive adhesive is cooled to form the thermally conductive adhesive layer 9. By providing the thermally conductive adhesive layer 9, on the one hand, the heat dissipation efficiency of the battery cell assembly 10 is improved, and on the other hand, the battery cell assembly 10 is fixed to further prevent it from shaking.

[0041] For example, a first clamping portion 41 is provided on the top of the top cover 4, and the first bottom plate 12 and the second bottom plate 22 cooperate to form a second clamping portion 120, and the first clamping portion 41 is configured to be clamped to the second clamping portion 120, so as to facilitate the stacking of multiple household energy storage battery packs. In this embodiment, the first clamping portion 41 is two first ribs arranged at intervals, and the second clamping portion 120 is two second ribs arranged at intervals, and the two second ribs can be placed between the two first ribs, and the sides of the two second ribs that are away from each other are respectively abutted against the sides of the two first ribs that are close to each other, so as to improve the structural stability of the stacked household energy storage battery packs.

[0042] The household energy storage battery pack provided in this embodiment has enlarged its own heat conduction area, improved the heat dissipation efficiency of the battery cell assembly 10, and can also promptly discharge a large amount of heat generated by the large-capacity battery cells during use through the heat dissipation holes 31 in the absence of external heat dissipation conditions, thereby effectively avoiding accidents.

[0043] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Household energy storage battery pack, characterized in that: The invention comprises a box body, wherein the box body comprises a first L-shaped profile (1), a second L-shaped profile (2), two sealing plates (3) and a top cover (4); the first L-shaped profile (1) and the second L-shaped profile (2) are connected to form a U-shaped frame; the two sealing plates (3) are respectively connected to the two ends of the U-shaped frame in the length direction; the top cover (4) is connected to the top of the first L-shaped profile (1), the second L-shaped profile (2) and the two sealing plates (3); the first L-shaped profile (1), the second L-shaped profile (2), the two sealing plates (3) and the top cover (4) cooperate to form a containing space; a battery cell assembly (10) is placed in the containing space; the first L-shaped profile (1) and the second L-shaped profile (2) are both provided with a heat conduction cavity; the sealing plate (3) is provided with a heat dissipation hole (31); the heat dissipation hole (31) is correspondingly connected to the heat conduction cavity.

2. The household energy storage battery pack according to claim 1, characterized in that: The battery cell assembly (10) is spaced between the first L-shaped profile (1) and the second L-shaped profile (2), and a thermal conductive adhesive layer (9) is filled in the gap between the battery cell assembly (10) and the first L-shaped profile (1), and in the gap between the battery cell assembly (10) and the second L-shaped profile (2).

3. The household energy storage battery pack according to claim 1, characterized in that: The first L-shaped profile (1) comprises a first profile (11) and a first bottom plate (12), the first profile (11) being connected to a side of the first bottom plate (12) away from the second L-shaped profile (2), the second L-shaped profile (2) comprising a second profile (21) and a second bottom plate (22), the second profile (21) being connected to a side of the second bottom plate (22) away from the first L-shaped profile (1), the first bottom plate (12) being welded to the second bottom plate (22), and one of the sealing plates (3) being bolted to the sealing plate (3) The cover (4) is connected to one end of the first profile (11), the first bottom plate (12), the second profile (21) and the second bottom plate (22) in the length direction, and the other cover (3) is bolted to the other end of the first profile (11), the first bottom plate (12), the second profile (21) and the second bottom plate (22) in the length direction, and the top cover (4) is bolted to the first profile (11), one of the cover plates (3), the second profile (21) and the top of the other cover plate (3).

4. The household energy storage battery pack according to claim 3, characterized in that: The first profile (11) is provided with a plurality of first heat-conducting cavities (111) along its length direction, and the second profile (21) is provided with a plurality of second heat-conducting cavities (211) along its length direction, the first heat-conducting cavities (111), the second heat-conducting cavities (211) and the heat-dissipating holes (31) corresponding one to one, and the heat-dissipating holes (31) are connected to the corresponding first heat-conducting cavities (111) and the second heat-conducting cavities (211).

5. The household energy storage battery pack according to claim 3, characterized in that: The box body also includes a sealing ring (5), which is circumferentially fitted to the edge of the top cover (4), and the sealing ring (5) is bolted to the top cover (4) and the first profile (11), one of the sealing plates (3), the second profile (21), and the other sealing plate (3).

6. The household energy storage battery pack according to claim 3, characterized in that: The box body also includes two sealing gaskets (6), which are U-shaped and have a plurality of screw holes at intervals. A bolt passes through the screw holes of one of the sealing plates (3) and one of the sealing gaskets (6) and is connected to one end of the first profile (11), the first bottom plate (12), the second profile (21) and the second bottom plate (22) in the length direction, and a bolt passes through the screw holes of another sealing plate (3) and another of the sealing gaskets (6) and is connected to the other end of the first profile (11), the first bottom plate (12), the second profile (21) and the second bottom plate (22) in the length direction.

7. The household energy storage battery pack according to claim 3, characterized in that: A partition (7) is arranged in the box body, the partition (7) abuts against the first profile (11) and the second profile (21), the partition (7) divides the accommodating space into a battery compartment and an electrical compartment, and the battery cell assembly (10) is arranged in the battery compartment.

8. The household energy storage battery pack according to claim 7, characterized in that: The electrical compartment is provided with a heat sink (8), the heat sink (8) is used to balance the heat flow, and the battery compartment is in communication with the electrical compartment.

9. The household energy storage battery pack according to claim 3, characterized in that: A first engaging portion (41) is provided at the top of the top cover (4); the first bottom plate (12) and the second bottom plate (22) cooperate to form a second engaging portion (120); and the first engaging portion (41) is configured to be engaged with the second engaging portion (120).

10. The household energy storage battery pack according to claim 7, characterized in that: The household energy storage battery pack further comprises a power module (a) and a battery management module (b), wherein the power module (a) is arranged in the electrical compartment and is bolted to the partition (7), and the battery management module (b) is arranged in the battery compartment and is bolted to the first profile (11) and / or the second profile (21).

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