Battery cell frame and battery with same

Abstract

The utility model belongs to the technical field of battery shells, and particularly relates to a battery cell frame and a battery with the same. The battery cell frame is provided with an inner hole penetrating along the thickness direction of a battery; the battery cell frame comprises a frame body defined by a first frame edge, a second frame edge, a third frame edge and a fourth frame edge, the first frame edge and the second frame edge are oppositely arranged in the horizontal direction, the third frame edge and the fourth frame edge are oppositely arranged in the vertical direction, and the third frame edge is located above the fourth frame edge; an anti-explosion valve hole, a liquid injection hole and a pole mounting hole are formed in the frame edge of the frame main body. The frame main body is formed by enclosing the frame edges, and the frame main body with the required size can be enclosed by adjusting the sizes of the first frame edge, the second frame edge, the third frame edge and the fourth frame edge, so that pole core assemblies with different sizes can be accommodated, and the processing size range of the battery shell is expanded.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery casings, and particularly relates to a cell frame and a battery having the cell frame. Background Art

[0002] The casings of existing batteries are usually processed by stamping. Specifically, a steel shell with a cell groove is stamped on a raw material plate. After the cell is placed in the cell groove, a cover plate is welded to the top of the steel shell to obtain a closed casing.

[0003] However, during the stamping process, the raw material plate stretches and deforms. Affected by factors such as the strength and toughness of the material, the stamping depth of the cell groove is limited, resulting in limited size design of the casing and inability to meet the design requirements of extremely thin batteries. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the problem that for the casing of the existing battery, the stamping depth of the cell groove is limited, resulting in limited size design of the casing, a cell frame and a battery having the cell frame are provided.

[0005] To solve the above technical problem, on the one hand, an embodiment of the utility model provides a cell frame, which has an inner hole penetrating along the thickness direction of the battery; the cell frame includes a frame body surrounded by a first frame edge, a second frame edge, a third frame edge and a fourth frame edge. The first frame edge and the second frame edge are oppositely arranged in the horizontal direction, the third frame edge and the fourth frame edge are oppositely arranged in the vertical direction, and the third frame edge is located above the fourth frame edge;

[0006] Explosion-proof valve holes, liquid injection holes and pole post mounting holes are provided on the frame edges of the frame body.

[0007] Optionally, both the pole post mounting holes and the liquid injection holes are located on the third frame edge.

[0008] Optionally, the cell frame further includes a plurality of spaced-apart heat dissipation fins provided on the first frame edge and / or the second frame edge, and the heat dissipation fins are integrally formed with the frame body.

[0009] Optionally, the pole post mounting holes are located on the first frame edge and / or the second frame edge; the liquid injection holes and the pole post mounting holes are located on the same frame edge.

[0010] Optionally, the cell frame further includes a plurality of spaced-apart heat dissipation fins provided on the third frame edge, and the heat dissipation fins are integrally formed with the frame body.

[0011] Optionally, the explosion-proof valve hole is located on the first frame edge, the second frame edge or the third frame edge; and the explosion-proof valve hole is machined along the extending direction of the frame edge where it is located.

[0012] Optionally, the pole installation hole is a first waist-shaped hole provided on the frame body. The first waist-shaped hole is eccentrically arranged in the width direction of the frame body. The eccentricity distance of the first waist-shaped hole is 0.1 - 0.4 times the width of the frame edge where it is located, and the first waist-shaped hole is at least 2 mm away from the edge of the frame body in the width direction.

[0013] Optionally, the pole installation hole is a first circular hole provided on the frame body. The first circular hole is centrally arranged in the width direction of the frame body, and the aperture of the first circular hole is 0.3 - 0.7 times the width of the frame edge where it is located.

[0014] Optionally, the explosion-proof valve hole is a second waist-shaped hole provided on the battery cell frame. The second waist-shaped hole is at least 2 mm away from the edge of the frame body in the width direction.

[0015] On the other hand, an embodiment of the present invention provides a battery, including the above-mentioned battery cell frame, a pole core assembly disposed in the inner hole of the battery cell frame, two pole column assemblies disposed on the battery cell frame and electrically connected to the pole core assembly, an explosion-proof valve and a plugging member, and two shell covers. The two shell covers are respectively welded to both sides of the battery cell frame to seal both sides of the inner hole of the battery cell frame.

[0016] In the battery cell frame of the present invention, the frame body of the battery cell frame is formed by enclosing a first frame edge, a second frame edge, a third frame edge and a fourth frame edge, so that the battery cell frame has an inner hole penetrating along the thickness direction of the battery for accommodating the pole core assembly. Moreover, since the frame body is formed by enclosing each frame edge, it is possible to obtain a frame body with a required width by adjusting the widths of the first frame edge, the second frame edge, the third frame edge and the fourth frame edge, so as to accommodate pole core assemblies with different thicknesses, thereby increasing the processing dimension range of the battery shell, eliminating the need for stamping, and reducing the processing difficulty. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a battery provided by an embodiment of the present invention;

[0018] Figure 2 is Figure 1 a sectional view of

[0019] Figure 3 is Figure 2 an enlarged view of part A in

[0020] Figure 4 is Figure 1Schematic structural diagram of the battery cell frame therein;

[0021] Figure 5 is Figure 4 Enlarged view of part B therein;

[0022] Figure 6 is Figure 4 Schematic diagram when placed;

[0023] Figure 7 is Figure 1 Schematic structural diagram of the battery cell frame in another embodiment therein.

[0024] The reference numerals in the specification are as follows:

[0025] 100, battery cell frame; 200, shell cover; 300, electrode core assembly;

[0026] 1, frame main body; 11, first frame edge; 12, second frame edge; 13, third frame edge; 14, fourth frame edge; 15, liquid injection hole; 16, pole column mounting hole; 17, step groove; 18, explosion-proof valve hole; 2, heat dissipation fin. Detailed implementation manners

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] As Figures 1 to 3 shown, an embodiment of the present utility model provides a battery, including a battery cell frame 100, an electrode core assembly 300 disposed in the inner hole of the battery cell frame 100, a pole column assembly, an explosion-proof valve and a plugging member that are electrically connected to the electrode core assembly 300 and disposed on the battery cell frame 100, and two shell covers 200. The battery cell frame 100 has an inner hole penetrating in the thickness direction of the battery. The two shell covers 200 are respectively fixed on both sides of the battery cell frame 100 to seal both sides of the inner hole of the battery cell frame 100, so as to enclose an accommodation cavity for accommodating the electrode core assembly 300.

[0029] As Figure 4 and Figure 6 shown, the battery cell frame 100 includes a frame main body 1 formed by enclosing a first frame edge 11, a second frame edge 12, a third frame edge 13 and a fourth frame edge 14. The first frame edge 11 and the second frame edge 12 are oppositely arranged in the horizontal direction, the third frame edge 13 and the fourth frame edge 14 are oppositely arranged in the vertical direction, and the third frame edge 13 is located above the fourth frame edge 14.

[0030] An explosion-proof valve hole 18, a liquid injection hole 15 and a pole column mounting hole 16 are provided on the frame edge of the frame main body 1.

[0031] The liquid injection hole 15 is used to inject electrolyte into the battery, and the sealing member is used to seal the liquid injection hole 15 after injection. The explosion-proof valve is installed in the explosion-proof valve hole 18.

[0032] Since the frame body 1 of the battery cell frame 100 is formed by enclosing the first frame edge 11, the second frame edge 12, the third frame edge 13 and the fourth frame edge 14, the inner hole of the battery cell frame 100 penetrates along the thickness direction of the battery, and the explosion-proof valve hole 18, the liquid injection hole 15 and the pole post mounting hole 16 are all arranged on the frame edges of the frame body 1. Therefore, the battery cell frame 100 is arranged around the small side surface of the electrode core assembly 300, and the battery cell frame 100 is the support main body of the battery housing. At the same time, the size (such as length, width or height) of the first frame edge 11, the second frame edge 12, the third frame edge 13 and the fourth frame edge 14 can also be adjusted to enclose the frame body 1 with the required size, so as to accommodate the electrode core assemblies 300 with different sizes, improve the processing size range of the battery housing, and simplify the processing process without stamping, reduce the processing difficulty and reduce the production cost.

[0033] In the battery of the present utility model, the frame body 1 of the battery cell frame 100 is formed by enclosing the first frame edge 11, the second frame edge 12, the third frame edge 13 and the fourth frame edge 14, so that the battery cell frame 100 has an inner hole penetrating along the thickness direction of the battery for accommodating the electrode core assembly 300. Moreover, since the frame body 1 is formed by enclosing each frame edge, the width of the first frame edge 11, the second frame edge 12, the third frame edge 13 and the fourth frame edge 14 can be adjusted to obtain the frame body 1 with the required width, so as to accommodate the electrode core assemblies 300 with different thicknesses, improve the processing size range of the battery housing, and reduce the processing difficulty without stamping.

[0034] In one embodiment, the thickness of the frame edge of the battery cell frame 100 is 0.8 mm to 3.5 mm, and the thickness of the shell cover 200 is 0.1 mm to 0.5 mm. The battery cell frame 100 with a relatively large frame edge thickness is used as the support main body of the battery housing, and the shell cover 200 with a relatively thin thickness is used to seal the battery cell frame 100 and protect the electrode core assembly 300, so that while realizing the protection function of the battery housing, the battery cell frame 100 of the battery is combined with the shell cover 200 with a relatively thin thickness to reduce the overall thickness of the battery.

[0035] In one embodiment, the thickness of the frame edge of the battery cell frame 100 is 1.5 mm, and the thickness of the shell cover 200 is 0.2 mm.

[0036] In one embodiment, as Figures 3 to 5 shown, the battery cell frame 100 further includes a step groove 17 provided on at least one surface in the thickness direction of the frame body 1. The step groove 17 is communicated with the inner hole, and the shell cover 200 is welded and sealed in the step groove 17. The step groove 17 positions the shell cover 200 of the battery.

[0037] In one embodiment, the depth of the step groove 17 is the same as the thickness of the shell cover 200, so that the top surface of the shell cover 200 is flush with the corresponding side surface of the frame body 1.

[0038] In one embodiment, as Figure 4 shown, the pole post mounting holes 16 are located on the first frame edge 11 and / or the second frame edge 12, and the liquid injection hole 15 and the pole post mounting holes 16 are located on the same frame edge.

[0039] Since the pole post mounting holes 16 are located on the first frame edge 11 and / or the second frame edge 12, and the first frame edge 11 and the second frame edge 12 are oppositely arranged in the horizontal direction, therefore, the pole post assembly can avoid being arranged at the bottom of the battery.

[0040] Moreover, since there is a gap between the positive and negative electrodes of the electrode core assembly 300 and the frame body 1, therefore, when the liquid injection hole 15 and the pole post mounting holes 16 are located on the same frame edge, the electrolyte can be injected into the gap between the electrode core assembly 300 and the frame body 1, which is convenient for injecting the electrolyte into the battery.

[0041] In one embodiment, two pole post mounting holes 16 are provided, and the two pole post mounting holes 16 are respectively located on the first frame edge 11 and the second frame edge 12.

[0042] In one embodiment, the liquid injection hole 15 is located on the first frame edge 11.

[0043] In one embodiment, as Figure 4 shown, the battery cell frame 100 further includes a plurality of spaced-apart heat dissipation fins 2 provided on the third frame edge 13, and the heat dissipation fins 2 are integrally formed with the frame body 1. The third frame edge 13 is located above the fourth frame edge 14. Therefore, when the heat dissipation fins 2 are provided on the third frame edge 13, it does not affect the normal placement of the battery. The heat dissipation fins 2 can increase the heat dissipation area of the battery and improve the heat dissipation efficiency of the battery.

[0044] In one embodiment, the explosion-proof valve hole 18 is located on the first frame edge 11, the second frame edge 12 or the third frame edge 13, and the explosion-proof valve hole 18 is machined along the extension direction of the frame edge where it is located. Avoiding setting the explosion-proof valve hole 18 on the fourth frame edge 14 can prevent the explosion-proof valve from being installed at the bottom of the battery and affecting the normal use of the explosion-proof valve.

[0045] In one embodiment, the explosion-proof valve hole 18 is located on the third frame edge 13.

[0046] In other embodiments, as Figure 7 shown, the pole post mounting holes 16 and the liquid injection hole 15 can both be located on the third frame edge 13.

[0047] The battery cell frame 100 may further include a plurality of heat dissipation fins 2 spaced apart and disposed on the first frame side 11 and / or the second frame side 12, and the heat dissipation fins 2 are integrally formed with the frame body 1.

[0048] In one embodiment, the first frame side 11, the second frame side 12, the third frame side 13, and the fourth frame side 14 have the same width, defined as the frame side width A, a chamfer B is formed between adjacent frame sides, and the outer diameter of the chamfer B is R.

[0049] In one embodiment, the pole mounting hole 16 is a first waist-shaped hole provided on the frame body 1, the first waist-shaped hole is eccentrically arranged in the width direction of the frame body 1, the eccentric distance of the first waist-shaped hole is 0.1-0.4 times the width of the frame side where it is located, the first waist-shaped hole is at a distance of R + 1 mm from the edge of the battery cell frame 100 in the length direction, and the first waist-shaped hole is at a distance of at least 2 mm from the edge of the frame body 1 in the width direction.

[0050] The "eccentric distance of the first waist-shaped hole" refers to the distance between the center of the first waist-shaped hole and the center of the battery cell frame 100 in the width direction of the battery cell frame 100.

[0051] The width of the battery cell frame 100 ranges from 8 to 55 mm. The larger the width of the battery cell frame 100, the larger the eccentric distance of the first waist-shaped hole can be designed, so that the external connecting member of the pole assembly can be designed to be large-sized, facilitating connection with an external module. Specifically, the width of the battery cell frame 100 is usually 8-10 mm. At this time, the eccentric distance of the first waist-shaped hole is 1-2 mm.

[0052] The length of the first waist-shaped hole of the present utility model ranges from 7 to 50 mm, and the cross-sectional area of the first waist-shaped hole is 14 mm 2 ~100 mm 2 . The cross-sectional area of the first waist-shaped hole is larger than the current-carrying area of the pole. By limiting the cross-sectional area of the first waist-shaped hole to limit the current-carrying area, and the higher the battery rate, the larger the current-carrying area, and the larger the length of the first waist-shaped hole needs to be designed.

[0053] Since the shell cover 200 is welded to both sides of the battery cell frame 100, when the shell cover 200 is welded, thermal stress will be generated at the edges in the width direction of the battery cell frame 100. Therefore, it is restricted that the pole mounting hole is at least 2 mm away from the edge of the battery cell frame 100 to avoid the situations of welding through, welding leakage, or excessive deformation when the hole position is too close to the edge.

[0054] In other embodiments, as Figure 7 shown, the pole mounting hole 16 may be a first circular hole provided on the frame body 1, the first circular hole is centrally arranged in the width direction of the frame body 1, and the diameter of the first circular hole is 0.3-0.7 times the width A of the frame side where it is located.

[0055] Figure 7 As shown, at the basic magnification, the width A of the frame edge is 15 mm, and the aperture of the first round hole is 7.5 mm.

[0056] In one embodiment, the liquid injection hole 15 includes a second round hole and a sealing groove that are sequentially communicated along the thickness direction of the frame edge where it is located. The second round hole is located inside the battery cell frame 100. The aperture of the second round hole is 2 mm to 5 mm.

[0057] In one embodiment, the aperture of the second round hole is 3.25 mm, the aperture of the sealing groove is 6 mm, and the depth of the sealing groove is 0.7 mm.

[0058] In one embodiment, as Figure 4 shown, the explosion-proof valve hole 18 is a second waist-shaped hole provided on the battery cell frame 100. The second waist-shaped hole is at least 2 mm away from the edge of the battery cell frame 100 in the width direction, and the distance between the second waist-shaped hole and the edge of the frame body 1 in the length direction is at least 1.5 times of the above R.

[0059] Since the shell cover 200 is welded to both sides of the battery cell frame 100, when the shell cover 200 is welded, thermal stress will be generated at the edges of the battery cell frame 100 in the width direction. Limiting the explosion-proof valve hole 18 to be at least 2 mm away from the edge of the battery cell frame 100 can avoid the situations of welding through, welding leakage, or excessive deformation when the hole position is too close to the edge.

[0060] In one embodiment, the explosion-proof valve hole 18 includes a first stepped hole, a second stepped hole, and a pressure relief hole that are sequentially communicated along the thickness direction of the frame edge where it is located. The pressure relief hole is located inside the battery cell frame 100.

[0061] The explosion-proof valve 700 includes an explosion-proof sheet with a notch and an explosion-proof film. The explosion-proof sheet is welded at the second stepped hole, and the explosion-proof film is attached to the first stepped hole.

[0062] Wherein, at least part of the projection area of the pressure relief hole on the explosion-proof sheet completely coincides with the notch area on the explosion-proof sheet. There is a gap between the explosion-proof sheet and the explosion-proof film to prevent the initiation pressure of the explosion-proof valve from increasing when the explosion-proof film covers the notch on the explosion-proof sheet, resulting in the explosion-proof valve not being able to initiate normally when the internal pressure of the battery reaches the preset pressure.

[0063] Since a side plate is provided between the side surface of the extreme core and the inner wall of the battery cell frame 100, and the side plate is used to limit, support and insulate the extreme core. The side plate abuts against the inner wall of the battery cell frame 100 and is located inside the explosion-proof valve hole 18. There should be a certain gap between the explosion-proof sheet and the side plate so that the pressure can be applied to the scored area of the explosion-proof sheet to detonate the explosion-proof valve. Therefore, in the present utility model, the explosion-proof valve hole 18 is designed in the form of a pressure relief hole, a second stepped hole and a first stepped hole that are sequentially distributed from the inside to the outside of the battery cell frame 100, so that the stepped surface between the pressure relief hole and the second stepped hole can support the explosion-proof sheet, and the pressure inside the battery can be applied to the explosion-proof sheet through the pressure relief hole.

[0064] It should be noted that in actual processing, the number of stepped holes provided can be adjusted according to needs, but it is necessary to ensure that at least two stepped holes are provided.

[0065] In an embodiment, the outer diameter of the chamfer B is R and the inner diameter is r, where R≥0.5 mm and r≤6 mm. The smaller R is, the better, and the larger r is, the better, so that the wall thickness at the chamfer is larger than the wall thickness at the straight section of the frame edge, thereby improving the structural strength of the battery cell frame 100.

[0066] In addition, an embodiment of the present utility model provides a battery cell frame 100, whose structure is the same as that of the battery cell frame 100 in any of the above embodiments and the processing method is the same, so details are not described herein again.

[0067] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery cell frame, characterized in that, The battery cell frame (100) has an inner hole penetrating in the thickness direction of the battery; the battery cell frame includes a frame body (1) formed by enclosing a first frame edge (11), a second frame edge (12), a third frame edge (13) and a fourth frame edge (14), the first frame edge (11) and the second frame edge (12) are oppositely arranged in the horizontal direction, the third frame edge (13) and the fourth frame edge (14) are oppositely arranged in the vertical direction, and the third frame edge (13) is located above the fourth frame edge (14); The frame edges of the frame body (1) are provided with an explosion-proof valve hole (18), a liquid injection hole (15) and a pole post mounting hole (16).

2. The cell frame according to claim 1, characterized in that, Both the pole post mounting hole (16) and the liquid injection hole (15) are located on the third frame edge (13).

3. The cell frame according to claim 2, wherein, The battery cell frame (100) further includes a plurality of spaced-apart heat dissipation fins (2) provided on the first frame edge (11) and / or the second frame edge (12), and the heat dissipation fins (2) are integrally formed with the frame body (1).

4. The cell frame according to claim 1, wherein, The pole post mounting hole (16) is located on the first frame edge (11) and / or the second frame edge (12); the liquid injection hole (15) and the pole post mounting hole (16) are located on the same frame edge.

5. The cell frame according to claim 4, characterized in that, The battery cell frame (100) further includes a plurality of spaced-apart heat dissipation fins (2) provided on the third frame edge (13), and the heat dissipation fins (2) are integrally formed with the frame body (1).

6. The cell frame according to claim 1, wherein The explosion-proof valve hole (18) is located on the first frame edge (11), the second frame edge (12) or the third frame edge (13); and the explosion-proof valve hole (18) is processed along the extending direction of the frame edge where it is located.

7. The cell frame according to claim 1, characterized in that, The pole post mounting hole (16) is a first kidney-shaped hole provided on the frame body (1), the first kidney-shaped hole is eccentrically arranged in the width direction of the frame body (1), the eccentric distance of the first kidney-shaped hole is 0.1 to 0.4 times the width of the frame edge where it is located, and the first kidney-shaped hole is at least 2 mm away from the edge of the frame body (1) in the width direction.

8. The cell frame according to claim 1, wherein The pole post mounting hole (16) is a first circular hole provided on the frame body (1), the first circular hole is centrally arranged in the width direction of the frame body (1), and the aperture of the first circular hole is 0.3 to 0.7 times the width of the frame edge where it is located.

9. The cell frame according to claim 1, wherein The explosion-proof valve hole (18) is a second kidney-shaped hole provided on the battery cell frame (100), and the second kidney-shaped hole is at least 2 mm away from the edge of the frame body (1) in the width direction.

10. A battery, characterized in that, It includes the battery cell frame (100) according to any one of claims 1 to 9, a pole core assembly (300) arranged in the inner hole of the battery cell frame (100), a pole post assembly, an explosion-proof valve and a plugging member electrically connected to the pole core assembly (300) and arranged on the battery cell frame (100), and two shell covers (200), and the two shell covers (200) are respectively welded to both sides of the battery cell frame (100) to seal both sides of the inner hole of the battery cell frame (100).

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