Soft package battery cell long knife module capable of discharging tabs from single side

Abstract

According to the soft package battery cell long knife module capable of discharging the tabs from the single side, in the module, a lower cover is of a U-shaped structure, the U-shaped structure comprises a horizontal plate and a pair of side walls extending upwards from the two sides of the horizontal plate, an upper cover is of a flat plate structure and covers the lower cover, an aerogel layer is laid in the U-shaped structure, and a plurality of battery cells are laid in the aerogel layer to form an upper-layer battery cell string and a lower-layer battery cell string; each layer of battery cell string is a one-parallel and six-string combination body with positive and negative electrodes connected end to end, the bus copper bar is connected with the tab, the insulating part is sleeved on the bus copper bar, the insulating part is provided with a threaded bottom hole, the first end cover is connected with one side of the upper cover and one side of the lower cover, and the first end cover is provided with a counterbore used for connecting a screw with the threaded bottom hole of the insulating part. The second end cover is connected with the other side of the upper cover and the other side of the lower cover and provided with an anti-explosion valve. The module is convenient to assemble, compact in structure and simple to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery modules, and in particular to a soft-pack battery cell long blade module with a single-side output terminal ear. Background Art

[0002] The power battery module is an important part of new energy technology. By forming a battery pack, it provides energy and power for the storage of new energy vehicles. In order to increase the cruising range of the entire vehicle, the battery often adopts a lightweight module design and a combination of battery cells to save costs and reduce the weight of the battery module. The existing technology of tubular multiple-combination assembly is difficult, and the lap welding of the upper and lower plates often has problems such as poor welds or large deformation, and the appearance is not beautiful enough.

[0003] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0004] The purpose of the utility model is to provide a soft-pack battery cell long knife module with a single-side output terminal ear, which realizes the convenience of battery cell assembly and takes into account the reliability and beauty of welding, thereby meeting the needs of convenient assembly and welding.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model discloses a soft-pack battery cell long blade module with a single-side tab, comprising:

[0007] The lower cover is a U-shaped structure, which includes a horizontal plate and a pair of side walls extending upward from both sides of the horizontal plate.

[0008] The upper cover is a flat plate structure, and the upper cover is arranged on the lower cover.

[0009] Aerogel layers, which are laid in a U-shaped structure,

[0010] Multiple battery cells are laid on the aerogel layer to form two layers of battery cell strings, each layer of battery cell string is a combination of six strings with positive and negative electrodes connected end to end.

[0011] A busbar connecting the lugs,

[0012] The insulating member is sleeved on the copper bus bar, and the insulating member is provided with a threaded bottom hole.

[0013] The first end cover is connected to one side of the upper cover and the lower cover, and the first end cover is provided with a countersunk hole for screwing the threaded bottom hole of the insulating member.

[0014] The second end cover is connected to the other side of the upper cover and the lower cover, and the second end cover is provided with an explosion-proof valve.

[0015] In the soft-pack battery cell long knife module with a single-side tab, the tabs of the upper and lower layers of battery cell strings near one end of the second end cover are bent 90 degrees.

[0016] In the long knife module of the soft-pack battery cell with a single-side output terminal ear, the battery cell is abutted against the U-shaped structure via a fixing piece whose shape is consistent with that of the battery cell.

[0017] In the long blade module of the soft-pack battery cell with a single-side tab, the tab length of the battery cell is 8-10 mm.

[0018] In the long blade module of the soft-pack battery cell with a single-side tab, the insulating component is provided with a hot-melt hole for gluing the busbar.

[0019] In the soft-pack battery cell long blade module with a single-side output terminal ear, the first end cover is provided with an FPC collector connected to the battery cell.

[0020] In the soft-package battery cell long blade module with a single-side output terminal ear, the upper cover is adhesively bonded with an aerogel layer with an adhesive surface.

[0021] In the soft-pack battery cell long blade module with a single-side output terminal ear, the soft-pack battery cell long blade module is a rectangular parallelepiped structure.

[0022] In the long blade module of the soft-pack battery cell with a single-side output terminal ear, the first end cover is buckled inwardly between the upper cover and the lower cover, and the second end cover is buckled inwardly between the upper cover and the lower cover.

[0023] In the long blade module of the soft-pack battery cell with a single-side output terminal ear, the bending angle between the side wall and the horizontal plate is less than 90°.

[0024] In the above technical scheme, the utility model provides a long knife module for a soft-pack battery cell with a single-sided output ear, which has the following beneficial effects: the sheet metal forming and bending process of the upper and lower covers of the utility model realizes the effective buckling of the outer shell, the top lap welding method of the upper and lower end plates, the left and right first end covers and the second end covers are designed to buckle inwards, the upper and lower covers are easy to assemble, because there is a groove support at the bottom, the installation can ensure flatness and effectively ensure the reliability of battery cell welding, the first end cover and the second end cover are buckled with the upper and lower covers at the same time, and the welding can be completed by simple positioning, and the welding is reliable; the battery cells and the busbars are first assembled and buckled into the assembled upper and lower components. This method is conducive to the realization of automation, with low assembly difficulty and high qualified rate; and compared with the existing tube-type shell, it avoids the external damage and difficulty of shell entry that are difficult to check when entering the shell; the soft-pack battery cells of the utility model are also easy to group, and the battery cells are embedded in the bottom fixing parts and the copper bar insulating parts to completely isolate the two welding points and reasonably distribute them, so that reliability and safety can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 A schematic diagram of an exploded view of a long blade module of a soft-pack battery cell with a single-side output terminal ear provided in an embodiment of the utility model.

[0027] Figure 2 A schematic diagram of the assembled structure of a long blade module for a soft-pack battery cell with a single-side output terminal ear provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 directly connected or indirectly connected 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.

[0034] 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.

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] See also Figure 1-2 As shown, in one embodiment, a single-side tab-out soft-pack battery long blade module of the utility model includes:

[0037] The lower cover 2 is a U-shaped structure, which includes a horizontal plate and a pair of side walls extending upward from both sides of the horizontal plate.

[0038] The upper cover 1 is a flat plate structure, and the upper cover 1 is arranged on the lower cover 2.

[0039] The aerogel layer 10 is laid in a U-shaped structure,

[0040] Multiple battery cells are laid on the aerogel layer 10 to form two layers of battery cell strings, each layer of battery cell strings is a combination of six strings with positive and negative electrodes connected end to end.

[0041] The busbar 6 is connected to the lugs.

[0042] The insulating member 7 is sleeved on the busbar 6 and is provided with a threaded bottom hole.

[0043] The first end cover 5 is connected to one side of the upper cover 1 and the lower cover 2. The first end cover 5 is provided with a countersunk hole for screwing the threaded bottom hole of the insulating member 7.

[0044] The second end cover 3 is connected to the other side of the upper cover 1 and the lower cover 2 , and the second end cover 3 is provided with an explosion-proof valve 4 .

[0045] In a preferred embodiment of the soft-pack battery cell long knife module with a single-side tab, the tabs of the upper and lower layers of battery cell strings near one end of the second end cover 3 are bent 90 degrees.

[0046] In a preferred embodiment of the soft-package battery cell long knife module with a single-side output terminal, the battery cell is abutted against the U-shaped structure via a fixing member 9 with the same shape as the battery cell.

[0047] In a preferred embodiment of the long knife module of the soft-pack battery cell with a single-side tab, the tab length of the battery cell is 8-10 mm.

[0048] In a preferred embodiment of the soft-pack battery cell long knife module with a single-side tab, the insulating member 7 is provided with a hot melt hole for gluing the busbar 6 .

[0049] In the preferred embodiment of the soft-package battery cell long knife module with a single-side tab, the first end cover 5 is provided with an FPC collector 8 connected to the battery cell.

[0050] In a preferred embodiment of the soft-pack battery cell long blade module with a single-side tab, the upper cover 1 is adhered with an aerogel layer 10 with an adhesive surface.

[0051] In a preferred embodiment of the soft-pack battery cell long blade module with a single-side output terminal ear, the soft-pack battery cell long blade module is a rectangular parallelepiped structure.

[0052] In a preferred embodiment of the soft-pack battery cell long knife module with a single-sided output terminal, the first end cover 5 is buckled inwardly between the upper cover 1 and the lower cover 2, and the second end cover 3 is buckled inwardly between the upper cover 1 and the lower cover 2.

[0053] In a preferred embodiment of the long knife module of the soft-pack battery cell with a single-sided tab, the bending angle between the side wall and the horizontal plate is less than 90°.

[0054] In one embodiment, the length of the pole ear of the soft-pack battery cell is cut from 20mm of the body to 8-10mm, and the pole ear of the soft-pack battery cell is laser welded to form a 1P6S combination with positive and negative electrodes connected end to end. The pole ear is bent 90° at the end of the explosion-proof valve 4 on one side to achieve a two-layer symmetrical arrangement; the busbar 6 is covered with a PP+FG30 insulating member 7 on the outside, and the insulating member 7 and the copper bar are combined after hot-melt holes are designed and filled with glue. The upper and lower parts of the insulating member 7 and the pole ear contact parts are hollowed out for easy welding. The up-and-down welding method has both insulation and avoids the possibility of overlap. The copper bar and the pole ear are laser welded; a threaded bottom hole is provided on the upper part of the insulating member 7, and a metallic plastic countersunk screw can be used to connect the copper bar to the first end cover 5 through the countersunk hole of the end plate, where the battery cell, the copper bar and the first end cover 5 can be combined; the FPC collector 8 is welded to the inside of the battery cell to realize The voltage, temperature and other related parameters are collected to realize real-time monitoring of the module status; the bottom of the module has a plastic fixing part 9 that is consistent with the shape of the battery cell as abutment, which is convenient for the battery cell to be buckled and fixed while providing insulation protection, and is fixed to the bottom of the lower shell with a countersunk plastic screw; an aerogel layer 10 with an adhesive surface is pasted on the bottom of the lower shell to have the functions of protection and insulation protection; the battery cell is buckled with the fixing part 9 at the bottom, and after the first layer of battery cells is laid, the fixing part 9 is installed and fixed, and the second layer of battery cells is laid after completion; the upper cover 1 is pasted with an aerogel layer 10 with an adhesive surface to have the functions of protection and insulation protection; the upper cover 1 is buckled with the lower horizontal plate. Because the bending angle is less than 90°, the groove of the lower bottom horizontal plate supports the upper cover 1 flat plate. After it is fixed with a positioning tool, the laser welding operation is completed to finally form a 1P6S soft knife module to complete the PACK.

[0055] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present application.

[0056] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A soft-pack battery cell long blade module with a single-side tab, characterized in that: These include, The lower cover is a U-shaped structure, which includes a horizontal plate and a pair of side walls extending upward from both sides of the horizontal plate. The upper cover is a flat plate structure, and the upper cover is arranged on the lower cover. Aerogel layers, which are laid in a U-shaped structure, Multiple battery cells are laid on the aerogel layer to form two layers of battery cell strings, each layer of battery cell string is a combination of six strings with positive and negative electrodes connected end to end. A busbar connecting the lugs, The insulating member is sleeved on the copper bus bar, and the insulating member is provided with a threaded bottom hole. The first end cover is connected to one side of the upper cover and the lower cover, and the first end cover is provided with a countersunk hole for screwing the threaded bottom hole of the insulating member. The second end cover is connected to the other side of the upper cover and the lower cover, and the second end cover is provided with an explosion-proof valve.

2. A single-side tab-out soft-pack battery long blade module according to claim 1, characterized in that: The tabs of the upper and lower layers of the battery cell strings close to one end of the second end cover are bent 90 degrees.

3. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The battery core is abutted against the U-shaped structure via a fixing piece whose shape is consistent with that of the battery core.

4. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The length of the tab of the battery cell is 8-10 mm.

5. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The insulating member is provided with a hot-melt hole for gluing the copper busbar.

6. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The first end cover is provided with an FPC collector connected to the battery cell.

7. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The upper cover is adhesively bonded with an aerogel layer having an adhesive surface.

8. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The soft-pack battery cell long blade module is a rectangular parallelepiped structure.

9. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The first end cover is buckled inwardly between the upper cover and the lower cover, and the second end cover is buckled inwardly between the upper cover and the lower cover.

10. The long blade module of a soft-pack battery cell with a single-side tab according to claim 1, characterized in that: The bending angle between the side wall and the horizontal plate is less than 90°.

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