Cell frame, processing process, and battery having cell frame

Abstract

The present application belongs to the technical field of battery processing, and in particular, relates to a cell frame (100), a processing process, and a battery having the cell frame (100). The cell frame (100) has an inner hole running therethrough in the direction of thickness of the battery. The cell frame (100) comprises a frame body (1) enclosed by a first frame edge (11), a second frame edge (12), a third frame edge (13) and a fourth frame edge (14), wherein the first frame edge (11) and the second frame edge (12) are arranged opposite each other in a horizontal direction, the third frame edge (13) and the fourth frame edge (14) are arranged opposite each other in a vertical direction, and the third frame edge (13) is located above the fourth frame edge (14); and the frame edges of the frame body (1) are provided with an explosion-proof valve hole (18), a liquid injection hole (15) and a terminal mounting hole (16). The frame body (1) is enclosed by the respective frame edges, and the frame body (1) of a desired size can be enclosed by adjusting the dimensions of the first frame edge (11), the second frame edge (12), the third frame edge (13), and the fourth frame edge (14), thereby accommodating cell core assemblies (300) of different sizes and expanding the processing size range of a battery housing.

Description

Cell frame and processing technology and battery with such cell frame Technical Field

[0001] This application belongs to the field of battery processing technology, and in particular relates to cell frames and processing technology, as well as batteries having such cell frames. Background Technology

[0002] The casing of existing batteries is usually processed by stamping. Specifically, a steel casing with cell slots is formed by stamping on a raw material plate. The cells are placed in the cell slots and then a cover plate is welded to the top of the steel casing to obtain a closed casing.

[0003] However, during the stamping process, the raw material plate is stretched and deformed. Due to factors such as material strength and toughness, the stamping depth of the cell slot is limited, which restricts the size design of the casing and makes it impossible to meet the design requirements of ultra-thin batteries.

[0004] Application content

[0005] The technical problem to be solved by this application is that the stamping depth of the cell slot in the existing battery casing is limited, which leads to the limitation of the casing size design. This application provides a cell frame, a processing technology, and a battery having the cell frame.

[0006] To address the aforementioned technical problems, in one aspect, embodiments of this application provide a battery cell frame having an inner hole extending along the thickness direction of the battery; the battery cell frame includes a frame body formed by a first frame edge, a second frame edge, a third frame edge, and a fourth frame edge, wherein the first frame edge and the second frame edge are arranged opposite each other in the horizontal direction, the third frame edge and the fourth frame edge are arranged opposite each other in the vertical direction, and the third frame edge is located above the fourth frame edge;

[0007] The frame body is provided with explosion-proof valve holes, liquid injection holes and pole mounting holes on its frame edge.

[0008] Optionally, both the electrode mounting hole and the injection hole are located on the edge of the third frame.

[0009] Optionally, the cell frame further includes a plurality of spaced heat dissipation fins disposed on the first frame edge and / or the second frame edge, the heat dissipation fins being integrally formed with the frame body.

[0010] Optionally, the electrode mounting hole is located on the first frame edge and / or the second frame edge; the injection hole and the electrode mounting hole are located on the same frame edge.

[0011] Optionally, the cell frame also includes a plurality of spaced heat dissipation fins disposed on the edge of the third frame, the heat dissipation fins being integrally formed with the frame body.

[0012] 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 extension direction of the frame edge where it is located.

[0013] On the other hand, this application provides a cell frame processing technology for processing the above-mentioned cell frame, characterized by including the following steps:

[0014] Extrusion processing of raw material frames;

[0015] The raw material frame is cut horizontally to a predetermined width to obtain a rectangular frame;

[0016] Explosion-proof valve holes, liquid injection holes, and pole mounting holes are machined on the rectangular frame;

[0017] A cell frame is obtained, the cell frame having an inner hole extending along the thickness direction of the battery.

[0018] Optionally, in the process of machining the explosion-proof valve hole, the liquid injection hole and the pole mounting hole on the rectangular frame, the width of the first frame side, the second frame side, the third frame side and the fourth frame side are the same, defined as the frame side width A, and a chamfer B is formed between adjacent frame sides, the outer diameter of the chamfer B being R.

[0019] Optionally, the electrode mounting hole is a first oblong hole provided on the cell frame. The first oblong hole is eccentrically arranged in the width direction of the cell frame. The eccentric distance of the first oblong hole is 0.1 to 0.4 times the width A of the frame edge. The first oblong hole is R+1mm away from the edge of the cell frame in the length direction. The first oblong hole is at least 2mm away from the edge of the cell frame in the width direction.

[0020] Optionally, the electrode mounting hole is a first circular hole provided on the cell frame. The first circular hole is centrally arranged in the width direction of the cell frame, and the diameter of the first circular hole is 0.3 to 0.7 times the width A of the frame side.

[0021] Optionally, machining the injection hole includes:

[0022] A second circular hole and a sealing groove are machined sequentially along the thickness direction of the frame edge, the second circular hole being located inside the cell frame;

[0023] The diameter of the second circular hole is 2mm to 5mm, and the distance between the second circular hole and the edge of the cell frame is at least 1.5 times R.

[0024] Optionally, the explosion-proof valve hole is a second oblong hole provided on the battery cell frame. The second oblong hole is at least 2 mm away from the edge of the battery cell frame in the width direction, and the distance between the second oblong hole and the edge of the battery cell frame in the length direction is at least 1.5 times R.

[0025] Optionally, the extrusion processing raw material frame includes:

[0026] The frame body and multiple sheets are extruded and processed, with the multiple sheets integrally formed on the top frame edge or side frame edge of the frame body to obtain the raw material frame;

[0027] When the raw material frame of the preset width is subsequently cut laterally, the sheet body forms heat dissipation fins on the battery cell frame.

[0028] Optionally, after horizontally cutting a raw material frame of a preset width to obtain a rectangular frame, the process further includes:

[0029] A stepped groove is machined or rolled on at least one side surface of the rectangular frame along the thickness direction of the battery, and the stepped groove communicates with the inner hole of the cell frame.

[0030] On the other hand, this application provides a battery including the above-mentioned cell frame, a core assembly disposed in the inner hole of the cell frame, two terminal post assemblies disposed on the cell frame and electrically connected to the core assembly, an explosion-proof valve and a sealing component, and two shell covers, wherein the two shell covers are respectively welded to both sides of the cell frame to seal both sides of the inner hole of the cell frame.

[0031] In the cell frame processing technology of this application, a raw material frame with the required cross-sectional shape is first extruded, and then a rectangular frame of the required width is obtained by transversely cutting the raw material frame. Various holes are then machined on the rectangular frame to produce the cell frame, which has an internal hole extending along the thickness direction of the battery, thus accommodating the electrode core assembly. Since the rectangular frame is made by transversely cutting the raw material frame, the width of the rectangular frame can be adjusted by changing the width of the cut raw material frame, and the cross-sectional dimensions of the rectangular frame can be adjusted by changing the cross-sectional shape of the raw material frame. This allows the cell frame to adapt to electrode core assemblies of different sizes, increasing the processing size range of the battery casing without the need for stamping the battery casing, thus simplifying the processing technology and reducing processing difficulty. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the structure of a battery provided in an embodiment of this application;

[0033] Figure 2 is a cross-sectional view of Figure 1;

[0034] Figure 3 is an enlarged view of part A in Figure 2;

[0035] Figure 4 is a schematic diagram of the cell frame in Figure 1;

[0036] Figure 5 is an enlarged view of part B in Figure 4;

[0037] Figure 6 is a schematic diagram of the placement shown in Figure 4;

[0038] Figure 7 is a structural schematic diagram of the cell frame in Figure 1 in another embodiment;

[0039] Figure 8 is a flowchart of the manufacturing process for the battery cell frame in Figure 4.

[0040] The reference numerals in the accompanying drawings are as follows:

[0041] 100. Cell frame; 200. Housing cover; 300. Electrode core assembly;

[0042] 1. Frame body; 11. First frame edge; 12. Second frame edge; 13. Third frame edge; 14. Fourth frame edge; 15. Liquid injection hole; 16. Pole post mounting hole; 17. Step groove; 18. Explosion-proof valve hole; 2. Heat dissipation fins. Detailed Implementation

[0043] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0044] As shown in Figures 1 to 3, one embodiment of this application provides a battery, including a core assembly 300 disposed in the inner hole of a cell frame 100, a terminal assembly disposed on the cell frame 100 and electrically connected to the core assembly 300, an explosion-proof valve and a sealing element, and two shell covers 200. The cell frame 100 has an inner hole that extends along the thickness direction of the battery. The two shell covers 200 are respectively welded to both sides of the cell frame 100 to seal both sides of the inner hole of the cell frame 100, thereby forming a receiving cavity for accommodating the core assembly 300.

[0045] As shown in Figures 4 and 5, the battery cell frame 100 includes a frame body 1 formed by 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 arranged opposite each other in the horizontal direction, and the third frame edge 13 and the fourth frame edge 14 are arranged opposite each other in the vertical direction, with the third frame edge 13 located above the fourth frame edge 14.

[0046] The frame body 1 has an explosion-proof valve hole 18, an injection hole 15, and an electrode mounting hole 16 on its frame side.

[0047] The electrolyte injection port 15 is used to inject electrolyte into the battery, and the sealing component is used to seal the electrolyte injection port 15 after injection. An explosion-proof valve is installed in the explosion-proof valve port 18.

[0048] Since the main frame 1 of the cell frame 100 is formed by the first frame side 11, the second frame side 12, the third frame side 13, and the fourth frame side 14, and the inner hole of the cell frame 100 extends along the thickness direction of the battery, and the explosion-proof valve hole 18, the liquid injection hole 15, and the electrode mounting hole 16 are all located on the frame side of the main frame 1, the cell frame 100 surrounds the small side of the electrode core assembly 300, and the cell frame 100 is the main supporting body of the battery casing. At the same time, the required size of the main frame 1 can be formed by adjusting the dimensions (e.g., length, width, or height) of the first frame side 11, the second frame side 12, the third frame side 13, and the fourth frame side 14, thereby accommodating electrode core assemblies 300 of different sizes, increasing the processing size range of the battery casing, eliminating the need for stamping, simplifying the processing technology, reducing processing difficulty, and reducing production costs.

[0049] In the battery of this application, the main body 1 of the cell frame 100 is formed by the enclosure of a first frame side 11, a second frame side 12, a third frame side 13, and a fourth frame side 14, so that the cell frame 100 has an inner hole extending along the thickness direction of the battery to accommodate the electrode core assembly 300. Moreover, since the main body 1 is formed by the enclosure of each frame side, the required width of the main body 1 can be obtained by adjusting the width of the first frame side 11, the second frame side 12, the third frame side 13, and the fourth frame side 14, thereby accommodating electrode core assemblies 300 of different thicknesses, thereby increasing the processing size range of the battery casing, eliminating the need for stamping, and reducing processing difficulty.

[0050] In one embodiment, the thickness of the frame edge of the cell frame 100 is 0.8mm to 3.5mm, and the thickness of the cover 200 is 0.1mm to 0.5mm. The cell frame 100 with a relatively large frame edge thickness is used as the main support of the battery casing, and the thinner cover 200 is used to seal the cell frame 100 and protect the electrode core assembly 300. This achieves the protective function of the battery casing, and the cell frame 100 combined with the thinner cover 200 reduces the overall thickness of the battery.

[0051] In one embodiment, the thickness of the frame edge of the cell frame 100 is 1.5 mm, and the thickness of the cover 200 is 0.2 mm.

[0052] In one embodiment, as shown in Figures 3 to 5, the cell frame 100 further includes a stepped groove 17 disposed on at least one side surface in the thickness direction of the frame body 1. The stepped groove 17 communicates with the inner hole, and the cover 200 is welded and sealed in the stepped groove 17. The stepped groove 17 limits the position of the battery cover 200.

[0053] In one embodiment, the depth of the stepped groove 17 is the same as the thickness of the cover 200, so that the top surface of the cover 200 is flush with the corresponding side surface of the frame body 1.

[0054] In one embodiment, as shown in FIG4, the electrode mounting hole 16 is located on the first frame edge 11 and / or the second frame edge 12, and the injection hole 15 and the electrode mounting hole 16 are located on the same frame edge.

[0055] Since the terminal mounting hole 16 is 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 arranged opposite each other in the horizontal direction, the terminal assembly can avoid the bottom of the battery.

[0056] Furthermore, since there is a gap between the positive and negative terminals of the electrode core assembly 300 and the frame body 1, when the injection hole 15 and the terminal mounting hole 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 facilitates the injection of electrolyte into the battery.

[0057] In one embodiment, there are two electrode mounting holes 16, which are located on the first frame edge 11 and the second frame edge 12, respectively, and the injection hole 15 is located on the first frame edge 11.

[0058] In one embodiment, as shown in FIG4, the cell frame 100 further includes a plurality of spaced heat dissipation fins 2 disposed on the third frame edge 13, the heat dissipation fins 2 being integrally formed with the frame body 1. The third frame edge 13 is located above the fourth frame edge 14, therefore, the placement of the heat dissipation fins 2 on the third frame edge 13 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.

[0059] 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 extending direction of the frame edge. By setting the explosion-proof valve hole 18 away from the fourth frame edge 14, it is possible to avoid the explosion-proof valve being installed at the bottom of the battery, which would affect the normal use of the explosion-proof valve.

[0060] In one embodiment, the explosion-proof valve hole 18 is located on the third frame edge 13.

[0061] In other embodiments, as shown in FIG7, the pole mounting hole 16 and the injection hole 15 may be located on the third frame edge 13.

[0062] The cell frame 100 may also include a plurality of spaced heat dissipation fins 2 disposed on the first frame edge 11 and / or the second frame edge 12, the heat dissipation fins 2 being integrally formed with the frame body 1.

[0063] As shown in Figure 8, this application also provides a cell frame processing technology for processing the above-mentioned cell frame 100, including:

[0064] S1: Extrusion processing raw material frame;

[0065] S2: Cut the raw material frame of the preset width horizontally to obtain a rectangular frame;

[0066] S3: Machining explosion-proof valve hole 18, liquid injection hole 15 and pole mounting hole 16 on the rectangular frame;

[0067] A cell frame 100 is thus obtained, the cell frame 100 having an inner hole extending along the thickness direction of the battery.

[0068] The battery cell frame processing technology involves extruding a raw material frame with the required cross-sectional shape, then cutting the raw material frame with a preset width laterally to obtain a rectangular frame of the required width, and then processing various holes on the rectangular frame to obtain the battery cell frame 100. The battery cell frame 100 has an inner hole that runs through the thickness direction of the battery to accommodate the electrode core assembly 300.

[0069] The cell frame 100 with a complete frame structure obtained by the above method eliminates the need for welding or other methods to connect the frame edges, thus simplifying the manufacturing process and improving the structural strength of the cell frame 100. Furthermore, the explosion-proof valve hole 18, the electrolyte injection hole 15, and the terminal mounting hole 16 are all machined on the cell frame 100. Compared to having these holes machined separately on different parts, this improves battery production efficiency.

[0070] Since the rectangular frame is made by cutting raw material frames laterally, the width of the rectangular frame can be adjusted by changing the width of the cut raw material frames, and the cross-sectional size of the rectangular frame can be adjusted by changing the cross-sectional shape of the raw material frames, so that the cell frame 100 can be adapted to the electrode core assembly 300 of different sizes, thereby increasing the processing size range of the battery casing without the need for stamping the battery casing, thus simplifying the processing process and reducing the processing difficulty.

[0071] In the cell frame processing technology of this application, a raw material frame with the required cross-sectional shape is first extruded, and then a rectangular frame of the required width is obtained by transversely cutting the raw material frame. Holes are then machined on the rectangular frame to obtain the cell frame 100, so that the cell frame 100 has an inner hole extending along the thickness direction of the battery, thereby accommodating the electrode core assembly 300. Since the rectangular frame is obtained by transversely cutting the raw material frame, the width of the rectangular frame can be adjusted by changing the width of the cut raw material frame, and the cross-sectional dimensions of the rectangular frame can be adjusted by changing the cross-sectional shape of the raw material frame. This allows the cell frame 100 to adapt to electrode core assemblies of different sizes, increasing the processing size range of the battery casing without the need for stamping the battery casing, thus simplifying the processing technology and reducing processing difficulty.

[0072] In one embodiment, as shown in Figures 4 and 6, in step S2, the widths of the first frame edge 11, the second frame edge 12, the third frame edge 13, and the fourth frame edge 14 are the same, defined as frame edge width A, and a chamfer B is formed between adjacent frame edges, with the outer diameter of chamfer B being R.

[0073] In one embodiment, the electrode mounting hole 16 is a first oblong hole provided on the cell frame 100. The first oblong hole is eccentrically arranged in the width direction of the cell frame 100. The eccentric distance of the first oblong hole is 0.1 to 0.4 times the width A of the frame. The first oblong hole is R+1mm away from the edge of the cell frame 100 in the length direction and at least 2mm away from the edge of the cell frame 100 in the width direction.

[0074] "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 cell frame 100 in the width direction of the cell frame 100.

[0075] The width of the cell frame 100 ranges from 8 to 55 mm. The wider the cell frame 100, the larger the eccentricity of the first oblong hole can be designed, thus allowing the external connector of the terminal assembly to be designed to a larger size, facilitating connection with external modules. Specifically, the width of the cell frame 100 is typically 8 to 10 mm, in which case the eccentricity of the first oblong hole is 1 to 2 mm.

[0076] The length of the first oblong hole in this application is between 7 and 50 mm, and the cross-sectional area of ​​the first oblong hole is between 14 mm and 100 mm². The cross-sectional area of ​​the first oblong hole is larger than the current-carrying area of ​​the electrode post. The current-carrying area is limited by limiting the cross-sectional area of ​​the first oblong hole. The higher the battery rate, the larger the current-carrying area, and the longer the length of the first oblong hole needs to be designed.

[0077] Since the cover 200 is welded to both sides of the cell frame 100, thermal stress will be generated on the edge of the cell frame 100 in the width direction when the cover 200 is welded. Therefore, the distance between the terminal mounting hole and the edge of the cell frame 100 is limited to at least 2mm to avoid the situation of weld burn-through, weld leakage or excessive deformation when the hole is too close to the edge.

[0078] In other embodiments, as shown in FIG7, the electrode mounting hole 16 can be a first circular hole provided on the cell frame 100. The first circular hole is centrally arranged in the width direction of the cell frame 100, and the diameter of the first circular hole is 0.3 to 0.7 times the width A of the frame.

[0079] As shown in Figure 7, at the base magnification, the frame width A is 15mm and the diameter of the first circular hole is 7.5mm.

[0080] In one embodiment, processing the injection hole 15 includes processing a second circular hole and a sealing groove that are sequentially connected along the thickness direction of the frame edge. The second circular hole is located inside the cell frame 100. The diameter of the second circular hole is 2mm to 5mm, and the distance between the sealing groove and the edge of the cell frame 100 in the length direction is at least 1.5 times the aforementioned R.

[0081] In one embodiment, the diameter of the second circular hole is 3.25 mm, the diameter of the sealing groove is 6 mm, and the depth of the sealing groove is 0.7 mm.

[0082] In one embodiment, as shown in FIG4, the explosion-proof valve hole 18 is a second oblong hole provided on the cell frame 100. The second oblong hole is at least 2 mm away from the edge of the cell frame 100 in the width direction, and the distance between the second oblong hole and the edge of the cell frame 100 in the length direction is at least 1.5 times the aforementioned R.

[0083] Since the cover 200 is welded to both sides of the cell frame 100, thermal stress will be generated on the edge of the cell frame 100 in the width direction when the cover 200 is welded. This limits the distance between the explosion-proof valve hole 18 and the edge of the cell frame 100 to at least 2mm, which can prevent the hole from being too close to the edge, resulting in weld burn-through, weld leakage or excessive deformation.

[0084] In one embodiment, machining the explosion-proof valve hole 18 includes:

[0085] A first stepped hole, a second stepped hole, and a pressure relief hole are machined sequentially along the thickness direction of the frame edge, with the pressure relief hole located inside the cell frame 100.

[0086] The explosion-proof valve 700 includes a scored explosion-proof disc and an explosion-proof membrane;

[0087] Weld the explosion-proof sheet to the second step hole;

[0088] Apply the explosion-proof film to the hole in the first step;

[0089] Among them, at least part of the projection area of ​​the pressure relief hole on the explosion-proof sheet completely coincides with the etched area on the explosion-proof sheet, and there is a gap between the explosion-proof sheet and the explosion-proof membrane to avoid the explosion-proof valve failing to detonate normally when the internal pressure of the battery reaches the preset pressure due to the explosion-proof membrane covering the etched area on the explosion-proof sheet, thus preventing the explosion-proof valve from detonating normally.

[0090] Because a side plate is provided between the side of the electrode core and the inner wall of the cell frame 100, the side plate is used to limit, support, and insulate the electrode core. The side plate abuts against the inner wall of the cell frame 100 and is located inside the explosion-proof valve hole 18. The explosion-proof plate needs to have a certain gap with the side plate so that pressure can be applied to the scored area of ​​the explosion-proof plate to detonate the explosion-proof valve. Therefore, in this application, the explosion-proof valve hole 18 is designed as a pressure relief hole, a second step hole, and a first step hole distributed sequentially from the inner side to the outer side of the cell frame 100, so that the stepped surface between the pressure relief hole and the second step hole can support the explosion-proof plate, and the pressure inside the battery can be applied to the explosion-proof plate through the pressure relief hole.

[0091] It should be noted that the number of stepped holes can be adjusted as needed during actual processing, but at least two stepped holes must be provided.

[0092] In one 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 cell frame 100.

[0093] In one embodiment, in step S1, the frame body 1 and multiple sheets are extruded and integrally formed on the top or side frame edges of the frame body 1 to obtain the raw material frame. In the subsequent step S3, when the raw material frame of a preset width is cut laterally, the sheets form heat dissipation fins 2 on the cell frame 100.

[0094] The frame body 1 is formed by 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 arranged opposite each other in the horizontal direction, and the third frame edge 13 and the fourth frame edge 14 are arranged opposite each other in the vertical direction, with the third frame edge 13 located above the fourth frame edge 14.

[0095] In one embodiment, as shown in Figures 4 and 5, after step S3, step S4 is further included: a stepped groove 17 is machined, stamped or rolled on at least one side surface of the cell frame 100 along the thickness direction of the battery, the stepped groove 17 is connected to the inner hole of the cell frame 100, and the shell cover 200 is subsequently fixed in the stepped groove 17.

[0096] In addition, one embodiment of this application provides a cell frame 100, the structure of which is the same as the structure and processing method of the cell frame 100 in any of the above embodiments, and will not be described again here.

[0097] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cell frame, characterized in that, The cell frame (100) has an inner hole that extends through the thickness direction of the battery; the cell frame includes a frame body (1) formed by 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 arranged opposite each other in the horizontal direction, the third frame edge (13) and the fourth frame edge (14) are arranged opposite each other in the vertical direction, and the third frame edge (13) is located above the fourth frame edge (14); The frame body (1) is provided with an explosion-proof valve hole (18), a liquid injection hole (15) and an electrode mounting hole (16) on the frame side.

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

3. The cell frame according to claim 2, characterized in that, The battery cell frame (100) further includes a plurality of spaced heat dissipation fins (2) disposed on the first frame edge (11) and / or the second frame edge (12), the heat dissipation fins (2) being integrally formed with the frame body (1).

4. The cell frame according to claim 1, characterized in that, The electrode mounting hole (16) is located on the first frame edge (11) and / or the second frame edge (12); the injection hole (15) and the electrode 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) also includes a plurality of spaced heat dissipation fins (2) disposed 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, characterized in that, 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 extension direction of the frame edge where it is located.

7. A cell frame processing technology for processing the cell frame (100) as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Extrusion processing of raw material frames; The raw material frame is cut horizontally to a predetermined width to obtain a rectangular frame; An explosion-proof valve hole (18), a liquid injection hole (15), and a pole mounting hole (16) are machined on the rectangular frame; A cell frame (100) is obtained, the cell frame (100) having an inner hole extending along the thickness direction of the battery.

8. The cell frame processing technology according to claim 7, characterized in that, In the process of machining the explosion-proof valve hole (18), the liquid injection hole (15) and the pole mounting hole (16) on the rectangular frame, the width of the first frame edge (11), the second frame edge (12), the third frame edge (13) and the fourth frame edge (14) are the same, which is defined as the frame edge width A. A chamfer B is formed between adjacent frame edges, and the outer diameter of the chamfer B is R.

9. The cell frame processing technology according to claim 8, characterized in that, The electrode mounting hole is a first oblong hole provided on the cell frame (100). The first oblong hole is eccentrically arranged in the width direction of the cell frame (100). The eccentric distance of the first oblong hole is 0.1 to 0.4 times the width A of the frame. The first oblong hole is R+1mm away from the edge of the cell frame (100) in the length direction. The first oblong hole is at least 2mm away from the edge of the cell frame (100) in the width direction.

10. The cell frame processing technology according to claim 8, characterized in that, The electrode mounting hole (16) is a first circular hole provided on the cell frame (100). The first circular hole is centrally arranged in the width direction of the cell frame (100), and the diameter of the first circular hole is 0.3 to 0.7 times the width A of the frame.

11. The cell frame processing technology according to claim 8, characterized in that, Processing the injection hole (15) includes: A second circular hole and a sealing groove are machined sequentially along the thickness direction of the frame edge, the second circular hole being located on the inner side of the cell frame (100); The diameter of the second circular hole is 2mm to 5mm, and the distance between the sealing groove and the edge of the cell frame (100) in the length direction is at least 1.5 times R.

12. The cell frame processing technology according to claim 8, characterized in that, The explosion-proof valve hole (18) is a second oblong hole provided on the battery cell frame (100). The second oblong 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 oblong hole and the edge of the battery cell frame (100) in the length direction is at least 1.5 times R.

13. The cell frame processing technology according to claim 7, characterized in that, The extrusion processing raw material frame includes: The frame body (1) and multiple sheets are extruded and processed. The multiple sheets are integrally formed on the top frame edge or side frame edge of the frame body (1) to obtain the raw material frame. When the raw material frame of the preset width is subsequently cut laterally, the sheet body forms heat dissipation fins (2) on the top frame edge or side frame edge of the battery cell frame (100).

14. The cell frame processing technology according to claim 7, characterized in that, After the raw material frame is cut horizontally to a preset width to obtain a rectangular frame, the process further includes: A stepped groove (17) is machined, stamped or rolled on at least one side surface of the rectangular frame along the thickness direction of the battery.

15. A battery, characterized in that, The battery includes a cell frame (100) as described in any one of claims 1 to 6, an electrode assembly (300) disposed in the inner hole of the cell frame (100), an electrode post assembly disposed on the cell frame (100) and electrically connected to the electrode assembly (300), an explosion-proof valve and a sealing element, and two housing covers (200), wherein the two housing covers (200) are respectively welded to both sides of the cell frame (100) to seal both sides of the inner hole of the cell frame (100).

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