Square battery insulation support structure

Abstract

According to the square battery insulation support structure, in the structure, a shell is of a cuboid structure with an opening, a core bag is contained in the shell, and tabs extend out of the core bag; the top cover covers the opening; the pole is arranged on the top cover and extends towards the interior of the shell; the first tab baffle obliquely extends upwards from the bottom of the first mounting part to the direction far away from the first side wall; the second tab baffle obliquely extends downwards from the bottom of the second mounting part in the direction away from the second side wall, the tab bypasses the first tab baffle and the second tab baffle and is fixedly connected with the pole, and the distance between the second tab baffle and the pole is larger than the thickness of the tab. According to the structure, the safety risk of lap joint of the tabs in the battery with the pole pieces or the shell is reduced, and the problems of tab breakage and folding are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a square battery insulation bracket structure. Background Art

[0002] With the rapid growth of lithium-ion battery applications in the fields of power and energy storage, the production efficiency and automation of lithium batteries are getting higher and higher. In the high-speed production and assembly process, the battery cell tabs are folded and welded to the poles before being put into the shell. The poles and cover plates will compress and fold the tabs, which may cause the tabs to be inserted into the pole pieces or collapse the pole pieces, thereby increasing the risk of short circuits inside the battery cell. In particular, when the "blade" shaped battery is longer, after the tabs are welded to the poles and put into the shell, there is a risk that the tabs will be inserted into the pole pieces or collapse the pole pieces, or the tabs will overlap with the inner wall of the shell, increasing the risk of short circuits inside the battery cell. Therefore, battery safety has become an important direction for the development of lithium batteries.

[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 utility model aims to provide a square battery insulating bracket structure, which can effectively reduce the risk of short overlap inside the pole piece and the risk of the pole ear overlapping the inner wall of the shell due to redundant pole ears.

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

[0006] A square battery insulation bracket structure of the utility model comprises:

[0007] A housing, which is a rectangular parallelepiped structure with an opening;

[0008] A core package is contained in the housing, and the core package extends out of the tab;

[0009] A top cover, which covers the opening;

[0010] A pole, which is disposed on the top cover and extends toward the housing;

[0011] A first insulating support is provided on a first side wall of the housing adjacent to the opening, the first insulating support comprising:

[0012] A first mounting portion is mounted on the first side wall and extends along the first side wall.

[0013] A first tab baffle extending obliquely upward from the bottom of the first mounting portion toward a direction away from the first side wall;

[0014] A second insulating bracket, which is arranged on a second side wall of the housing adjacent to the opening and opposite to the first side wall, and the second insulating bracket includes,

[0015] A second mounting portion, which is mounted on the second side wall and extends along the second side wall,

[0016] A second tab baffle, which extends obliquely downward away from the second side wall from the bottom of the second mounting portion. The tab bypasses the first tab baffle and the second tab baffle and is fixedly connected to the pole column. The distance from the second tab baffle to the pole column is greater than the thickness of the tab.

[0017] In the square battery insulating bracket structure described above, at least a part of the first tab baffle and the second tab baffle stagger in the height direction.

[0018] In the square battery insulating bracket structure described above, the second tab baffle is located above the first tab baffle.

[0019] In the square battery insulating bracket structure described above, the inclination angle of the first tab baffle extending obliquely upward away from the first side wall is 3-45 degrees, and the inclination angle of the second tab baffle extending obliquely downward away from the second side wall is 0-45 degrees.

[0020] In the square battery insulating bracket structure described above, the first tab baffle and the second tab baffle are arranged in parallel at intervals.

[0021] In the square battery insulating bracket structure described above, the tab bypasses the first tab baffle and the second tab baffle and is in a C shape.

[0022] In the square battery insulating bracket structure described above, the first mounting portion is snap-connected to the first side wall, and the second mounting portion is snap-connected to the second side wall.

[0023] In the square battery insulating bracket structure described above, the top cover includes a negative top cover and a positive top cover covering the openings at both ends of the housing.

[0024] In the square battery insulating bracket structure described above, a lower plastic layer is provided at the bottom of the top cover.

[0025] In the square battery insulating bracket structure described above, the first mounting portion and the first mounting portion are respectively provided with screw holes for bolt-connecting the housing.

[0026] In the above technical solution, a square battery insulation bracket structure provided by the present utility model has the following beneficial effects: The square battery insulation bracket structure can avoid the risk of the tab being inserted into the electrode plate after entering the shell, avoid the tab being lapped and short-circuited with the electrode plate, and at the same time can also avoid the tab being lapped with the inner wall of the shell, thereby improving the safety of the battery cell. It can plastically shape the folding form of the tab to improve the problems of tab fracture and folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0028] Figure 1 It is a schematic structural diagram of the square battery insulation bracket structure of the present utility model.

[0029] Figure 2 It is Figure 1 a sectional view taken along line A-A of

[0030] Figure 3 It is Figure 2 an enlarged schematic structural diagram of B-B of

[0031] Figure 4 It is a schematic structural diagram of the top cover of the square battery insulation bracket structure of the present utility model.

[0032] Figure 5 It is a schematic structural diagram of the first insulation bracket of the square battery insulation bracket structure of the present utility model.

[0033] Figure 6 It is a schematic structural diagram of the second insulation bracket of the square battery insulation bracket structure of the present utility model.

[0034] Figure 7 It is an exploded schematic structural diagram of the square battery insulation bracket structure of the present utility model.

[0035] In the figure: 1. Outer shell; 2. Core package; 3. Top cover; 4. Terminal; 5. First insulation bracket; 6. First installation part; 7. First tab baffle; 8. Second insulation bracket; 9. Second installation part; 10. Second tab baffle; 11. Tab; 12. Core package insulation sheet; 13. Negative top cover; 14. Positive top cover; 15. Lower plastic layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and 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 thus should not be construed as a limitation of the present utility model.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "coupling", "fixing", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0043] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0044] As Figure 1-7 shown, in one embodiment, a square battery insulation bracket structure of the present utility model includes

[0045] a housing 1, which is a cuboid structure with an opening;

[0046] a core package 2, which is accommodated in the housing 1, and the core package 2 extends the tab 11;

[0047] a top cover 3, which covers the opening;

[0048] a terminal post 4, which is arranged on the top cover 3 and extends into the housing 1;

[0049] a first insulation bracket 5, which is arranged on the first side wall of the housing 1 adjacent to the opening, and the first insulation bracket 5 includes

[0050] a first mounting portion 6, which is mounted on the first side wall and extends along the first side wall,

[0051] a first tab baffle 7, which extends obliquely upward from the bottom of the first mounting portion 6 away from the first side wall;

[0052] a second insulation bracket 8, which is arranged on the second side wall of the housing 1 adjacent to the opening opposite to the first side wall, and the second insulation bracket 8 includes

[0053] A second mounting portion 9, which is mounted on the second side wall and extends along the second side wall.

[0054] A second tab baffle 10, which extends obliquely downward away from the second side wall from the bottom of the second mounting portion 9. The tab 11 bypasses the first tab baffle 7 and the second tab baffle 10 and is fixedly connected to the terminal post 4. The distance between the second tab baffle 10 and the terminal post 4 is greater than the thickness of the tab.

[0055] In a preferred embodiment of the square battery insulation bracket structure described above, at least a part of the first tab baffle 7 and the second tab baffle 10 overlap in the height direction.

[0056] In a preferred embodiment of the square battery insulation bracket structure described above, the second tab baffle 10 is located above the first tab baffle 7.

[0057] In a preferred embodiment of the square battery insulation bracket structure described above, the inclination angle of the first tab baffle 7 extending obliquely upward away from the first side wall is 3 - 45 degrees, and the inclination angle of the second tab baffle 10 extending obliquely downward away from the second side wall is 0 - 45 degrees.

[0058] In a preferred embodiment of the square battery insulation bracket structure described above, the first tab baffle 7 and the second tab baffle 10 are arranged in parallel at intervals.

[0059] In a preferred embodiment of the square battery insulation bracket structure described above, the tab 11 bypasses the first tab baffle 7 and the second tab baffle 10 to form a C shape.

[0060] In a preferred embodiment of the square battery insulation bracket structure described above, the first mounting portion 6 is snap - connected to the first side wall, and the second mounting portion 9 is snap - connected to the second side wall.

[0061] In a preferred embodiment of the square battery insulation bracket structure described above, the top cover 3 includes a negative top cover 13 and a positive top cover 14 that cover the two open ends of the housing 1.

[0062] In a preferred embodiment of the square battery insulation bracket structure described above, a lower plastic layer 15 is provided at the bottom of the top cover 3.

[0063] In a preferred embodiment of the square battery insulation bracket structure described above, the first mounting portion 6 and the second mounting portion 6 are respectively provided with screw holes for bolt - connecting the housing 1.

[0064] In one embodiment, the first tab baffle 7 and the second tab baffle 10 are provided with limiting holes for the tab 10.

[0065] In one embodiment, a core package insulating sheet 12 is provided between the core package 2 and the shell 1 .

[0066] In one embodiment, after the pole lug 11 is folded, the head portion is welded to the pole post 4 inside the battery housing 1 to form a "C" shape; the first pole lug baffle 7 is located at the bottom of the first insulating bracket 5 and has an inclination angle, which constrains the bottom end surface of the folded pole lug 11. At the same time, there is a space above the first pole lug baffle 7 to accommodate the pole lug in a bent shape to avoid overlapping of the pole lug with the pole piece and the inside of the housing; the second pole lug baffle 10 is located above the first insulating bracket 5, and the distance between the second pole lug baffle 10 and the pole post 4 is greater than the thickness of the pole lug. The second pole lug baffle 10 constrains the welded pole lug 11 to avoid overlapping of the pole lug 11 with the pole piece and the inside of the housing.

[0067] 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.

[0068] 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 square battery insulation support structure, characterized in that: These include, A housing, which is a rectangular parallelepiped structure with an opening; A core package is contained in the housing, and the core package extends out of the tab; A top cover, which covers the opening; A pole, which is disposed on the top cover and extends toward the housing; A first insulating support is provided on a first side wall of the housing adjacent to the opening, the first insulating support comprising: A first mounting portion is mounted on the first side wall and extends along the first side wall. A first tab baffle extending obliquely upward from the bottom of the first mounting portion toward a direction away from the first side wall; A second insulating support is provided on a second side wall of the housing adjacent to the opening and opposite to the first side wall, the second insulating support comprising: A second mounting portion is mounted on the second side wall and extends along the second side wall, The second pole lug baffle extends obliquely downward from the bottom of the second mounting portion in a direction away from the second side wall. The pole lug bypasses the first pole lug baffle and the second pole lug baffle and is fixedly connected to the pole. The distance between the second pole lug baffle and the pole is greater than the thickness of the pole lug.

2. A square battery insulation support structure according to claim 1, characterized in that: The first pole tab baffle and the second pole tab baffle are at least partially staggered in the height direction.

3. A square battery insulation support structure according to claim 1, characterized in that: The second pole lug baffle is located above the first pole lug baffle.

4. A square battery insulation support structure according to claim 1, characterized in that: The first pole lug baffle extends upwardly in a direction away from the first side wall at an inclination angle of 3-45 degrees, and the second pole lug baffle extends downwardly in a direction away from the second side wall at an inclination angle of 0-45 degrees.

5. A square battery insulation support structure according to claim 1, characterized in that: The first electrode tab baffle and the second electrode tab baffle are arranged in parallel with an interval.

6. A square battery insulation support structure according to claim 1, characterized in that: The pole tab is in a C-shape around the first pole tab baffle and the second pole tab baffle.

7. A square battery insulation support structure according to claim 1, characterized in that: The first mounting portion is snap-connected to the first side wall, and the second mounting portion is snap-connected to the second side wall.

8. A square battery insulation support structure according to claim 1, characterized in that: The top cover comprises a negative electrode top cover and a positive electrode top cover which cover the openings at both ends of the shell.

9. A square battery insulation support structure according to claim 1, characterized in that: A lower plastic layer is provided at the bottom of the top cover.

10. A square battery insulation support structure according to claim 1, characterized in that: The first mounting portion and the second mounting portion are respectively provided with screw holes for bolting the housing.

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