Energy storage system structure

Abstract

The utility model relates to an energy storage system structure, which belongs to the technical field of batteries and comprises a plurality of battery cells arranged in sequence, a top cover plate is arranged at the top ends of the battery cells, at least two mounting holes are arranged at the top end of the top cover plate, pole columns are sleeved in the mounting holes, and a bar sheet is connected between two pole columns at the top ends of any two adjacent battery cells. An extension ring and a convex ring are sequentially sleeved outside the pole from bottom to top, the extension ring is integrally arranged on the inner side of the mounting hole, and the convex ring is integrally arranged at the top end of the mounting hole; the pole comprises a first pole body, a second pole body and a third pole body, the diameter of the first pole body is smaller than the inner diameter of the extension ring, the diameter of the second pole body is larger than the inner diameter of the extension ring and smaller than the maximum diameter of the protruding ring, and the diameter of the third pole body is smaller than the minimum diameter of the protruding ring. And integrally connected sealing rings are arranged between the pole and the extension ring, between the pole and the mounting hole and between the pole and the convex ring. According to the utility model, the sealing performance of the battery cell can be effectively ensured, and the safety performance of the battery cell during the service life is ensured.

Description

Technical Field

[0001] The utility model relates to a structure of an energy storage system, belonging to the technical field of batteries. Background Art

[0002] At present, in the face of many challenges such as resource shortage and environmental pollution, sustainable development has become a global consensus. Under the "dual carbon" strategic goal, new energy will gradually replace traditional environmentally polluting energy. As a carrier for storing electric energy, batteries can be used to store and transport the electric energy produced by power plants, which is of great significance to the development of the new energy industry.

[0003] Lithium-ion batteries have become the preferred batteries for portable electronic products, electric vehicles, and energy storage due to their advantages such as high capacity density, large specific energy, and long cycle life, and have been more and more widely used. In addition to the advantage of high capacity, batteries should also have advantages such as good safety and long cycle life to meet the usage standards and people's needs.

[0004] Currently, in the existing energy storage system structure, there are battery cells, bus bars, etc., and the battery cells are sealed and installed through structures such as a top cover sheet and a sealing ring. Since the current sealing ring is usually compressed and tightened at only one place during installation, the compressed and tightened part of the sealing ring is directly in contact with the outside world, making it very easy to be corroded and damaged.

[0005] A battery top cover structure with a layered flexible connection sheet disclosed in the Chinese utility model patent with the publication number of CN210692601U includes a top cover plate, a flexible connection sheet, and a sealing ring. The top cover plate has a through hole that penetrates the top cover plate from top to bottom; the flexible connection sheet includes multiple layers of metal sheets. The upper parts of the multiple layers of metal sheets are mutually bonded and fixed to form an integral section. The integral section passes through the through hole and is exposed above the top cover plate to be electrically connected to an external circuit; the lower parts of the multiple layers of metal sheets are spaced apart from each other to form a layered section. The layered section is located below the top cover plate and is electrically connected to the battery cell; the sealing ring is filled in the gap between the integral section and the through hole.

[0006] When the above reference example is installed, the sealing ring is filled in the gap between the integral section and the through hole. Although it can play a sealing role, during its use, the sealing part of the sealing ring is directly in contact with the outside world, making it very easy to be corroded and damaged, and its service life is short. Therefore, it is urgently needed to be improved. Content of the Utility Model

[0007] In order to overcome the above-mentioned shortcomings in the prior art, the utility model designs an energy storage system structure with good safety, which can effectively ensure the sealing performance of the battery cell and ensure the safety performance of the battery cell during its service life.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An energy storage system structure includes several battery cells arranged in sequence. A top cover plate is provided at the top of the battery cells. At least two mounting holes are provided at the top of the top cover plate. Pole columns are sleeved in the mounting holes. A bus bar is connected between two adjacent pole columns at the top of any two battery cells. An extension ring and a raised ring, both integrally provided with the top cover plate, are sequentially sleeved outside the pole column from bottom to top. The extension ring is integrally provided inside the mounting hole, and the raised ring is integrally provided at the top of the mounting hole and the cross-section of the raised ring is an inverted L shape. The pole column includes a first column body, a second column body and a third column body integrally connected from bottom to top. The diameter of the first column body is smaller than the inner diameter of the extension ring. The diameter of the second column body is larger than the inner diameter of the extension ring and smaller than the maximum diameter of the raised ring. The diameter of the third column body is smaller than the minimum diameter of the raised ring. Sealing rings integrally connected are provided between the pole column and the extension ring, between the pole column and the mounting hole, and between the pole column and the raised ring.

[0010] Further, an insulating member corresponding to the mounting hole is provided at the top of the top cover plate. The insulating member includes an insulating platform. A clamping hole is penetratingly provided at the top of the insulating platform. The clamping hole includes a first stepped hole and a second stepped hole sequentially provided from top to bottom. The diameter of the first stepped hole is smaller than that of the second stepped hole. The top of the insulating platform is connected to the bus bar. The sealing ring is provided between the inner circle of the first stepped hole and the third column body. The second stepped hole is clamped with the raised ring.

[0011] Further, connection hole groups for connecting with the insulating member are provided at both ends of the bus bar. The connection hole group includes four connection holes arranged in a rectangle. The two connection holes away from the center position of the bus bar are circular holes, and the two connection holes close to the center position of the bus bar are bottle-shaped holes.

[0012] Further, a center hole is provided at the center position of the four connection holes.

[0013] Further, four first convex platforms engaged with the connection hole group are provided at the top of the insulating platform. A clamping block with an isosceles trapezoid cross-section is integrally connected to the top of the first convex platform.

[0014] Further, a second convex platform engaged with a clamping hole provided at the top of the top cover plate is provided at the bottom of the insulating platform. A clamping block with an isosceles trapezoid cross-section is integrally connected to the bottom of the second convex platform.

[0015] Further, a lower plastic is attached to the bottom of the top cover plate. A top contact ring is upwardly extended at the position of the inner circle of the extension ring of the lower plastic. The top contact ring is clamped between the extension ring and the first column body.

[0016] Compared with the prior art, the present utility model has the following characteristics and beneficial effects:

[0017] 1. Through the multi-channel pressing and clamping of the sealing ring, the sealing performance of the sealing ring is effectively improved in the present utility model. Even if the topmost sealing ring is corroded and damaged, it can still be sealed through the pressing and clamping at other positions, thereby increasing the service life of the sealing ring and ensuring the safety performance of the battery cell during its service life. At the same time, after the insulation platform is assembled, the battery cell, the insulating part, and the tab are limited in position among the three, which can ensure the connection effect and also ensure the tensile and torsional resistance performance between the tab and the top cover sheet after connection, guaranteeing the connection quality during use.

[0018] 2. Through the setting of the insulating part in the present utility model, the tab and the top cover sheet can be isolated, playing an insulating role and ensuring the safe use of the battery cell. At the same time, the assembled insulating part can prevent creep of the raised ring during the rolling forming process, ensuring the normal operation of the battery cell. And by using the setting of the bottle-shaped hole, when the system is short-circuited, the tab can be melted from the bottle-shaped hole, thereby ensuring the safety of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the schematic installation structure diagram of the present utility model;

[0020] Figure 2 is the schematic top view structure diagram of the present utility model;

[0021] Figure 3 is the schematic cross-sectional structure diagram of the present utility model;

[0022] Figure 4 is Figure 3 the partial enlarged structure diagram at A of

[0023] Figure 5 is the partial structure diagram of the tab of the present utility model;

[0024] Figure 6 is the three-dimensional structure diagram of the insulating part of the present utility model;

[0025] Figure 7 [[ID=3 sixty]]is the schematic cross-sectional structure diagram of the insulating part of the present utility model.

[0026] Among them, the reference numerals are: 1, battery cell; 11, top cover sheet; 111, raised ring; 112, extension ring; 113, mounting hole; 12, sealing ring; 13, pole; 131, column one; 132, column two; 133, column three; 14, lower plastic; 141, top contact ring; 2, tab; 21, center hole; 22, circular hole; 23, bottle-shaped hole; 3, insulating part; 31, first boss; 32, insulation platform; 33, second boss; 34, first stepped hole; 35, second stepped hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present utility model will be described in more detail below in conjunction with embodiments.

[0028] Please refer to Figures 1 to 7 , the energy storage system structure of this embodiment includes a plurality of battery cells 1 arranged in sequence.

[0029] Among them, a top cover piece 11 is provided at the top of the battery cell 1, and two mounting holes 113 are provided at the top of the top cover piece 11, and a pole column 13 is sleeved in each mounting hole 113.

[0030] In this embodiment, the two mounting holes 113 at the top of the top cover piece 11 are symmetrically arranged front and back.

[0031] Please refer to Figure 1 , a bus bar 2 is connected between two corresponding pole columns 13 at the tops of adjacent two battery cells 1, and each battery cell 1 is sequentially connected through the bus bar 2. In this embodiment, the bus bar 2 is a straight aluminum sheet.

[0032] Please refer to Figure 4 , an extension ring 112 and a convex ring 111 that are both integrally provided with the top cover piece 11 are sequentially sleeved outside the pole column 13 from bottom to top. The extension ring 112 is integrally provided inside the mounting hole 113, and the convex ring 111 is integrally provided at the top of the mounting hole 113 and the cross section of the convex ring 111 is in an inverted L shape.

[0033] Among them, the pole column 13 includes a column body one 131, a column body two 132 and a column body three 133 that are integrally connected from bottom to top.

[0034] The diameter of the column body one 131 is smaller than the inner diameter of the extension ring 112, which is convenient for snapping the sealing ring 12 between the column body one 131 and the extension ring 112 to achieve the first pressing and snapping of the sealing ring 12.

[0035] The diameter of the column body two 132 is larger than the inner diameter of the extension ring 112 and smaller than the maximum diameter of the convex ring 111. The column body two 132 is arranged at the upper end of the extension ring 112, which is convenient for snapping the sealing ring 12 between the top of the extension ring 112 and the bottom end of the column body two 132 to achieve the second pressing and snapping of the sealing ring 12;

[0036] At the same time, a sealing ring 12 is snapped between the column body two 132 and the mounting hole 113 to achieve the third pressing and snapping of the sealing ring 12;

[0037] At the same time, the setting of the convex ring 111 with a cross section in an inverted L shape is convenient for snapping the sealing ring 12 between the top of the column body two 132 and the bottom end of the inner circle of the convex ring 111, thereby achieving the fourth pressing and snapping of the sealing ring 12.

[0038] The diameter of the third cylinder 133 is smaller than the minimum diameter of the raised ring 111, facilitating the insertion of the sealing ring 12 between the inner circle of the raised ring 111 and the third cylinder 133, thereby achieving the compression and engagement of the topmost part of the sealing ring 12.

[0039] Among them, each sealing ring 12 is integrally connected. Through multiple compressions and engagements of the sealing ring 12, the sealing performance of the sealing ring 12 is effectively enhanced. Even if the topmost sealing ring 12 is corroded and damaged, sealing can still be achieved through the compression and engagement at other positions, thereby increasing the service life of the sealing ring 12 and ensuring the safety performance of the battery cell 1 during its service life.

[0040] Furthermore, an insulating part 3 corresponding to the mounting hole 113 is provided at the top of the top cover sheet 11. In this embodiment, the material of the insulating part 3 is PP or PPS.

[0041] Specifically, the insulating part 3 includes an insulating platform 32. A clamping hole is penetrated through the top of the insulating platform 32. The clamping hole includes a first stepped hole 34 and a second stepped hole 35 arranged in sequence from top to bottom. The diameter of the first stepped hole 34 is smaller than that of the second stepped hole 35.

[0042] Among them, the top of the insulating platform 32 is connected to the tab 2. A sealing ring 12 is provided between the inner circle of the first stepped hole 34 and the third cylinder 133. The second stepped hole 35 is clamped with the raised ring 111, facilitating assembly and installation.

[0043] Specifically, please refer to Figure 5 , connection hole groups for connecting with the insulating part 3 are provided at both ends of the tab 2. The connection hole groups include four connection holes arranged in a rectangle. The two connection holes far from the center position of the tab 2 are circular holes 22, and the two connection holes close to the center position of the tab 2 are bottle-shaped holes 23.

[0044] Among them, the setting of the bottle-shaped holes 23 enables the tab 2 to fuse at the bottle-shaped holes 23 during system short circuit, thereby ensuring the safety of the battery cell.

[0045] Please refer to Figure 6 and Figure 7 , four first convex platforms 31 engaging with the connection hole groups are provided at the top of the insulating platform 32. A clamping block with an isosceles trapezoidal cross-section is integrally connected to the top of the first convex platform 31.

[0046] At the same time, a second convex platform 33 engaging with the four clamping holes provided at the top of the top cover sheet 11 is provided at the bottom of the insulating platform 32. A clamping block with an isosceles trapezoidal cross-section is integrally connected to the bottom of the second convex platform 33.

[0047] In this embodiment, the clamping holes at the top of the top cover sheet 11 are blind holes, which are divided into three sequentially connected segments. The diameter of the topmost part of the blind hole is the largest, and the diameter of the middle part is the smallest.

[0048] In this embodiment, after the insulating platform 32 is assembled, the battery cell 1, the insulating member 3, and the tab 2 are limited to each other, which can ensure the connection effect. After the connection is completed, the tensile and torsional resistance properties of the tab 2 and the top cover piece 11 can also be ensured, guaranteeing the connection quality during use.

[0049] At the same time, the setting of the insulating member 3 can isolate the tab 2 and the top cover piece 11, playing an insulating role and ensuring the safe use of the battery cell 1. At the same time, the assembled insulating member 3 can prevent the creep of the raised ring 111 during the rolling forming process, ensuring the normal operation of the battery cell.

[0050] Furthermore, a central hole 21 is provided at the central position of the four connecting holes. The setting of the central hole 21 can be used to identify the connection position.

[0051] Furthermore, a lower plastic 14 is attached to the bottom end of the top cover piece 11. A top contact ring 141 is upwardly extended at a position within the inner circle of the extension ring 112, and the top contact ring 141 is clamped between the extension ring 112 and the first column 131.

[0052] The working principle of the present utility model: The top cover piece 11, the sealing ring 12, the pole column 13, and the lower plastic 14 are formed by rolling, and then the insulating member 3 is installed. The bottom end of the insulating member 3 is clamped with the clamping hole through the second boss 33, and then the connection hole group of the tab 2 is clamped with the first boss 31 at the top end of the insulating member 3.

[0053] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0054] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the term "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present utility model can be understood according to specific circumstances.

[0055] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

Claims

1. A structure of an energy storage system, comprising a plurality of battery cells (1) arranged in sequence. A top cover plate (11) is provided at the top of the battery cell (1). At least two mounting holes (113) are provided at the top of the top cover plate (11). A pole column (13) is sleeved in the mounting hole (113). A bus bar (2) is connected between the two pole columns (13) at the top of any two adjacent battery cells (1). It is characterized in that: An extension ring (112) and a raised ring (111) that are both integrally provided with the top cover sheet (11) are sleeved on the outside of the terminal post (13) in sequence from bottom to top. The extension ring (112) is integrally provided inside the mounting hole (113), and the raised ring (111) is integrally provided at the top of the mounting hole (113), and the cross-section of the raised ring (111) is an inverted L shape; the terminal post (13) includes a first column body (131), a second column body (132), and a third column body (133) that are integrally connected from bottom to top. The diameter of the first column body (131) is smaller than the inner diameter of the extension ring (112), the diameter of the second column body (132) is larger than the inner diameter of the extension ring (112) and smaller than the maximum diameter of the raised ring (111), and the diameter of the third column body (133) is smaller than the minimum diameter of the raised ring (111). Sealing rings (12) that are integrally connected are provided between the terminal post (13) and the extension ring (112), between the terminal post (13) and the mounting hole (113), and between the terminal post (13) and the raised ring (111).

2. The structure of an energy storage system according to claim 1, characterized in that: An insulating member (3) corresponding to the mounting hole (113) is provided at the top of the top cover sheet (11). The insulating member (3) includes an insulating platform (32). A clamping hole is penetrated through the top of the insulating platform (32). The clamping hole includes a first stepped hole (34) and a second stepped hole (35) that are arranged in sequence from top to bottom. The diameter of the first stepped hole (34) is smaller than the diameter of the second stepped hole (35); the top of the insulating platform (32) is connected to the bar piece (2). The sealing ring (12) is provided between the inner circle of the first stepped hole (34) and the third column body (133), and the second stepped hole (35) is clamped with the raised ring (111).

3. A structure of an energy storage system according to claim 2, characterized in that: Connection hole groups for connecting with the insulating member (3) are provided at both ends of the bar piece (2). The connection hole groups include four connection holes arranged in a rectangle. The two connection holes away from the center position of the bar piece (2) are circular holes (22), and the two connection holes close to the center position of the bar piece (2) are bottle-shaped holes (23).

4. The structure of an energy storage system according to claim 3, wherein: A center hole (21) is provided at the center position of the four connection holes.

5. The structure of an energy storage system according to claim 3, wherein: Four first bosses (31) that are engaged with the connection hole groups are provided at the top of the insulating platform (32). A clamping block with an isosceles trapezoid cross-section is integrally connected to the top of the first boss (31).

6. The structure of an energy storage system according to claim 2, characterized in that: A second boss (33) that is engaged with the clamping hole provided at the top of the top cover sheet (11) is provided at the bottom of the insulating platform (32). A clamping block with an isosceles trapezoid cross-section is integrally connected to the bottom of the second boss (33).

7. A structure of an energy storage system according to claim 1, characterized in that: A lower plastic (14) is attached to the bottom of the top cover sheet (11). A top contact ring (141) is provided at the position where the lower plastic (14) is located inside the inner circle of the extension ring (112) and extends upward. The top contact ring (141) is clamped between the extension ring (112) and the first column body (131).

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