Battery cell, battery pack and electric equipment

Abstract

The utility model provides a battery cell, battery pack and electric equipment, the battery cell comprises a shell, a pole assembly, an electrode assembly and a partition frame, the shell is provided with an installation cavity, the pole assembly is installed in the shell, the electrode assembly is installed in the installation cavity, and one side of the electrode assembly close to the pole assembly is provided with a tab. The separation frame comprises a frame body and a separation plate, at least part of the frame body is arranged between the electrode assembly and the pole assembly, a via hole is formed in the position, corresponding to the pole lug, of the frame body, and the separation plate is connected to the frame body and located at the via hole and can move in the direction close to or away from the electrode assembly. The tab penetrates through the via hole and is electrically connected with the pole assembly, and the tab part is clamped between the electrode assembly and the partition plate, and / or the tab part is clamped between the pole assembly and the partition plate. The battery cell provided by the utility model can solve the technical problem that the structure of the existing battery cell is not compact enough.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery core, a battery pack and electrical equipment. Background Art

[0002] In the related art, a battery cell includes an electrode assembly (or core pack), a pole assembly, and a separator. The separator is positioned between the electrode assembly and the pole assembly. The electrode assembly is provided with a tab, which passes through a via in the separator and is electrically connected to the pole assembly. Furthermore, to install the separator, sufficient assembly clearance must be reserved between the pole assembly and the electrode assembly. After assembly, a large gap typically remains between the tab and the separator, resulting in a less-than-compact battery cell structure, making it difficult to increase the volume of the electrode assembly and improve the battery's energy density. Utility Model Content

[0003] The embodiments of the present utility model provide a battery cell, a battery pack and an electrical device, which can improve the technical problem that the existing battery cell structure is not compact enough.

[0004] In the first aspect, an embodiment of the present invention provides a battery cell including a shell, a pole assembly, an electrode assembly and a separator, wherein the shell is provided with an installation cavity, the pole assembly is installed in the shell, the electrode assembly is installed in the installation cavity, and a pole lug is provided on the side of the electrode assembly close to the pole assembly. The separator includes a frame and a separator, wherein the frame is at least partially provided between the electrode assembly and the pole assembly, and the frame is provided with a through hole at a position corresponding to the pole lug, the separator is connected to the frame and is located at the through hole, and the separator can move in a direction close to or away from the electrode assembly. The pole lug passes through the through hole and is electrically connected to the pole assembly, and the pole lug portion is clamped between the electrode assembly and the separator, and / or the pole lug portion is clamped between the pole assembly and the separator.

[0005] Optionally, in one embodiment, the partition plate is elastically connected to the frame so as to move closer to the pole assembly or the electrode assembly under the pushing action of the tab.

[0006] Optionally, in one embodiment, the periphery of the partition plate includes a connecting section and a free section that are connected to each other, the connecting section is fixedly connected to the frame, the free section is suspended, and the extension length of the free section is greater than or equal to the extension length of the connecting section, and the free section is spaced apart from the frame.

[0007] Optionally, in one embodiment, the partition plate is polygonal and has a plurality of side edges, wherein one of the side edges constitutes the connecting segment and the other side edges constitute the free segments.

[0008] Optionally, in one embodiment, the via is provided with a first shielding area and a second shielding area spaced apart from each other, at least a portion of the first shielding area and at least a portion of the second shielding area are respectively covered by at least one partition plate, a connecting gap is formed between the partition plates in the first shielding area and the partition plates in the second shielding area, and the tab passes through the via through the connecting gap.

[0009] Optionally, in one embodiment, the electrode tab includes an electrode connecting segment, a pole connecting segment, and an intermediate connecting segment, wherein the electrode connecting segment is located between the separator plate and the electrode assembly and is electrically connected to the electrode assembly, the pole connecting segment is located between the separator plate and the pole assembly and is electrically connected to the pole assembly, and the intermediate connecting segment is connected between the electrode connecting segment and the pole connecting segment, and the intermediate connecting segment at least partially extends toward the first shielding area or the second shielding area;

[0010] The width of the connecting gap is smaller than the extending length of the intermediate connecting section between the electrode connecting section and the pole connecting section, so that when the intermediate connecting section extends toward the first shielding area or the second shielding area, it can be attached to the partition plate in the first shielding area or the second shielding area.

[0011] Optionally, in one embodiment, the through hole has a first orifice and a second orifice relative to each other, the first orifice is closer to the electrode assembly than the second orifice; the partition plate is connected to the inner wall of the through hole, and a first accommodating cavity is formed between the partition plate and the first orifice, and the pole ear portion is accommodated in the first accommodating cavity; and / or, a second accommodating cavity is formed between the partition plate and the second orifice, and the pole ear portion is accommodated in the second accommodating cavity.

[0012] Optionally, in one embodiment, the partition plate includes a connecting side edge and an anti-scratch side edge, the connecting side edge is connected to the inner wall of the through hole, and the anti-scratch side edge is spaced apart from and opposite to the inner wall of the through hole.

[0013] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the battery cell described in any one of the above items.

[0014] In a third aspect, an embodiment of the present invention provides an electrical device, which includes the battery cell described in any one of the above.

[0015] Beneficial effects of the embodiments of the present utility model:

[0016] In an embodiment of the present invention, the separator includes a frame body and a separator plate, the frame body is provided with through-holes at positions corresponding to the tabs, the separator plate partially covers the through-holes, the tabs on the electrode assembly pass through the through-holes and are electrically connected to the pole assembly, and the tabs are partially clamped between the electrode assembly and the separator plate, and / or the tabs are partially clamped between the pole assembly and the separator plate. It can be understood that this allows the tabs to be tightly attached to the separator frame after assembly, avoiding a large gap between the tabs and the separator frame, thereby making the battery cell structure more compact, which is beneficial for increasing the volume of the electrode assembly and the energy density of the battery.

[0017] In addition, the present application also enables the partition plate to move in the direction of approaching or away from the electrode assembly, so that during the assembly process, the partition plate can be flexibly adjusted according to the thickness of the pole ears on its upper and lower sides. This not only allows the pole ears on the upper and lower sides of the partition plate to be tightly attached to the partition plate, thereby improving the structural compactness of the battery cell, but also facilitates the assembly of the battery cell and improves assembly efficiency.

[0018] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a structural diagram of an embodiment of a battery cell of the present application;

[0021] Figure 2 yes Figure 1 Exploded diagram of the structure of the battery cell;

[0022] Figure 3 yes Figure 1 Structural cross-sectional view of the battery cell;

[0023] Figure 4 yes Figure 2 A magnified view of the structure at point A;

[0024] Figure 5 This is a structural diagram of an embodiment of a separator in the battery cell of the present application;

[0025] Figure 6 yes Figure 5 A top view of the frame of the middle partition;

[0026] Figure 7 yes Figure 5 A top view of the center shelf;

[0027] Figure 8 yes Figure 5 Cross-section of the center partition;

[0028] Figure 9 This is a top view of another embodiment of the separator in the battery cell of the present application. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0030] In order to improve the technical problem that the existing battery cell 100 is not compact enough, according to the first aspect of the present application, Figures 1 to 3 As shown, an embodiment of the present invention provides a battery cell 100 , which mainly includes a shell 10 , a pole assembly 40 , an electrode assembly 20 and a separator 30 .

[0031] Among them, you can refer to Figure 3 The housing 10 is provided with an installation cavity 11, the pole assembly 40 is installed in the housing 10, the electrode assembly 20 is installed in the installation cavity 11, and the electrode assembly 20 is provided with a pole ear 21 on one side close to the pole assembly 40, and the pole ear 21 is electrically connected to the pole assembly 40. Specifically, in this embodiment, Figure 2 As shown, the shell 10 includes a peripheral protective shell 13, a top cover 12 and a bottom cover 14. The peripheral protective shell 13 extends in a rectangular ring shape, and the top cover 12 and the bottom cover 14 are respectively connected to the two ends of the peripheral protective shell 13 in the height direction, so that the peripheral protective shell 13, the top cover 12 and the bottom cover 14 jointly enclose the installation cavity 11.

[0032] exist Figure 2In the embodiment, the top cover 12 and the peripheral protective shell 13 are integrally formed. The peripheral protective shell 13 forms an installation opening 15 at one end away from the top cover 12. The installation opening 15 is used for installing the electrode assembly 20 into the installation cavity 11. After the electrode assembly 20 is installed into the installation cavity 11, the bottom cover 14 is installed into the installation opening 15. For example, the bottom cover 14 is fixed to the installation opening 15 by welding to cover the installation opening 15 and prevent the electrode assembly 20 from falling out of the housing 10. It should be noted that in order to prevent the electrode assembly 20 from short-circuiting due to conductive contact with the bottom cover 14, an insulating sheet 50 can be provided between the bottom cover 14 and the electrode assembly 20.

[0033] Of course, in other embodiments, the bottom cover 14 and the peripheral protective shell 13 may be integrally formed, and the peripheral protective shell 13 may form an installation opening 15 at one end away from the bottom cover 14. After the electrode assembly 20 is installed in the installation cavity 11, the top cover 12 is covered and installed at the installation opening 15.

[0034] Alternatively, the peripheral protective shell 13, the top cover 12 and the bottom cover 14 can be independent components. After the electrode assembly 20 is installed in the peripheral protective shell 13, the top cover 12 and the bottom cover 14 are welded and fixed to the two ends of the peripheral protective shell 13 respectively.

[0035] like Figure 2 As shown, a mounting through hole 121 is provided on the top cover 12 of the shell 10, and the mounting through hole 121 is connected to the mounting cavity 11. The pole assembly 40 is installed in the mounting through hole 121, so that the electrode assembly 20 in the mounting cavity 11 can be electrically connected to the pole assembly 40 through the pole ear 21 to realize the charging and discharging of the battery cell 100.

[0036] There are two pole assemblies 40, one for connecting to the positive electrode and the other for connecting to the negative electrode. Figure 3 As shown, each pole assembly 40 includes at least a conductive block 42, which is made of a conductive material (such as metal, graphite, semiconductor material, etc.). One end of the conductive block 42 is exposed outside the shell 10 to be electrically connected to the external circuit, and the other end of the conductive block 42 is electrically connected to the pole ear 21 of the electrode assembly 20 to achieve conductive connection with the electrode assembly 20, thereby realizing charging and discharging of the battery cell 100.

[0037] exist Figure 2 In the structural scheme shown, the pole assembly 40 also includes a welding ring 41 and an insulating connector 43. The welding ring 41 is used to be welded and fixed to the top cover 12. The insulating connector 43 is connected between the welding ring 41 and the conductive block 42 by injection molding, thereby making the welding ring 41 and the conductive block 42 relatively fixed.

[0038] The electrode assembly 20 is formed by winding a positive electrode sheet, a negative electrode sheet and a separator located between the positive electrode sheet and the negative electrode sheet. It is a component that produces electrochemical reactions in the battery cell 100, thereby enabling the battery cell 100 to be charged and discharged. The specific structure and working principle of the electrode assembly 20 can be referred to the relevant existing technology and will not be introduced in detail here.

[0039] like Figure 2 or Figure 3 As shown, a pole ear 21 is provided on one side of the electrode assembly 20 close to the pole assembly 40, and two pole ears 21 are provided. One pole ear 21 is formed by welding together a plurality of conductive sheets connected to the positive electrode sheet, and the other pole ear 21 is formed by welding together a plurality of conductive sheets connected to the negative electrode sheet. The two pole ears 21 are respectively connected to the two pole assemblies 40. For example, the pole ears 21 can be electrically connected to the pole assembly 40 by welding.

[0040] In order to prevent the parts of the electrode assembly 20 other than the pole ear 21 from contacting the pole assembly 40 or the top cover 12 and causing a short circuit, a separator 30 is also provided in the battery cell 100. The separator 30 is made of an insulating material (such as plastic, wood, etc.), and the separator 30 is located between the electrode assembly 20 and the top cover 12. Because the pole assembly 40 is located on the top cover 12, the separator 30 is at least partially located between the pole assembly 40 and the electrode assembly 20.

[0041] like Figure 5 As shown, in this embodiment, the partition frame 30 includes a frame body 31 and a partition plate 32. Figure 3 As shown, the frame 31 is in the shape of a rectangular plate and is disposed between the electrode assembly 20 and the terminal assembly 40. The frame 31 extends along the length of the electrode assembly 20 to better separate the electrode assembly 20 from the top cover 12 of the housing 10 and the components on the top cover 12. The frame 31 is provided with a through hole 311 at a position corresponding to the tab 21. The through hole 311 passes through the frame 31 along the thickness direction of the frame 31 (i.e., the height direction of the battery cell 100). In this way, the tab 21 can pass through the frame 31 and be electrically connected to the terminal assembly 40.

[0042] like Figure 5 As shown, the shape of the through hole 311 is rectangular. In order to ensure that the tab 21 can pass through the through hole 311, the length direction of the frame 31 is preferably Figure 4 and Figure 5 The length of the via hole 311 is greater than the length of the tab 21 , and the width of the via hole 311 is also greater than the width of the tab 21 in the width direction of the frame 31 .

[0043] like Figure 5 As shown, the partition plate 32 is connected to the frame 31 and is located at the through hole 311, and the partition plate 32 covers part of the through hole 311. Specifically, Figure 5In the above structural solution, the partition plate 32 is located in the through hole 311, and the partition plate 32 covers a portion of the through hole 311. Figure 3 The tab 21 passes through the frame 31 from a position in the through hole 311 that is not covered by the partition plate 32. This ensures that the tab 21 can pass through the frame 31 and be electrically connected to the pole assembly 40, while also enabling the separation of the electrode assembly 20 and the pole assembly 40 to be achieved through the partition plate 32.

[0044] Of course, in other embodiments, the partition plate 32 may also be located outside the through hole 311. For example, taking the thickness direction of the frame 31 as the up and down direction, the partition plate 32 may be located directly above or below the through hole 311, so that the partition plate 32 may also cover a portion of the through hole 311.

[0045] like Figure 5 As shown, in one embodiment, the number of partition plates 32 corresponding to each through hole 311 is two, the two partition plates 32 are respectively connected to the inner wall of the through hole 311, and the two partition plates 32 are spaced apart. At this time, the two partition plates 32 respectively cover a part of the area of ​​the through hole 311, and the pole ear 21 passes through the frame 31 through the connecting gap 314 between the two partition plates 32 and is connected to the pole assembly 40.

[0046] Alternatively, in other embodiments, the number of partition plates 32 corresponding to each through-hole 311 may also be one, and the one partition plate 32 is arranged in the through-hole 311 and covers most of the area of ​​the through-hole 311, and one side of the partition plate 32 is spaced apart from an inner wall of the through-hole 311, so that the pole ear 21 can pass through the through-hole 311 from one side of the partition plate 32 and be connected to the pole assembly 40.

[0047] Alternatively, the number of partition plates 32 corresponding to each through hole 311 may be three, four, five, etc. For example, Figure 5 On the basis of the structural solution shown, one of the partition plates 32 can be divided into two or more smaller partition plates 32 .

[0048] In short, the number of partition plates 32 corresponding to each through hole 311 can be flexibly set as needed, as long as the partition plates 32 can cover part of the through hole 311 and ensure that the tab 21 can pass through the through hole 311 and connect to the pole assembly 40.

[0049] like Figure 3 As shown, during assembly, the tab 21 passes through the through hole 311 and is electrically connected to the pole assembly 40, and the tab 21 is partially clamped between the electrode assembly 20 and the separator 32, and / or the tab 21 is partially clamped between the pole assembly 40 and the separator 32. Specifically, Figure 3In the structural solution shown, a portion of the tab 21 is clamped between the electrode assembly 20 and the partition plate 32 , and another portion is clamped between the pole assembly 40 and the partition plate 32 , which can make the structure of the battery cell 100 more compact.

[0050] Alternatively, in other embodiments, a portion of the tab 21 may be clamped between the electrode assembly 20 and the separator 32 , and all other portions of the tab 21 may be arranged corresponding to the communication gap 314 and electrically connected to the electrode assembly 40 .

[0051] Alternatively, in other embodiments, a portion of the electrode tab 21 may be clamped between the electrode column assembly 40 and the partition plate 32 , and all other portions of the electrode tab 21 are arranged corresponding to the communication gap 314 and electrically connected to the electrode assembly 20 .

[0052] It should be noted that, in order to achieve that the tab 21 is partially clamped between the electrode assembly 20 and the separator 32 or between the pole assembly 40 and the separator 32, as shown in FIG. Figure 3 As shown, during assembly, the electrode assembly 20 can press a portion of the electrode tab 21 against the partition plate 32 from bottom to top, and the pole assembly 40 can press a portion of the electrode tab 21 against the partition plate 32 from top to bottom.

[0053] In addition, in this embodiment, the separator 32 can move in a direction close to or away from the electrode assembly 20 .

[0054] Specifically, the partition plate 32 can move in a direction close to or away from the electrode assembly 20 by bending and deforming. For example, one side of the partition plate 32 is connected to the frame 31, and the other side is suspended and spaced apart from the frame 31. In this way, the partition plate 32 is an elastic plate that can bend and deform up and down, and can move in a direction close to or away from the electrode assembly 20.

[0055] Of course, the partition plate can also move in the direction of approaching or away from the electrode assembly 20 by sliding up and down as a whole. For example, the partition plate 32 is slidably installed on the frame 31 along the axial direction of the through hole 311, and the upper and lower sides of the partition plate 32 are connected to elastic parts (such as springs), so that the partition plate 32 can move in the direction of approaching or away from the electrode assembly 20.

[0056] You can refer to Figure 3 During the assembly process, when the thickness of the portion of the tab 21 located on the upper side of the partition plate 32 is larger, the portion of the tab 21 can press the partition plate 32 downward, so that the partition plate 32 moves toward the direction close to the electrode assembly 20 and is tightly pressed against the lower portion of the tab 21, so that the tabs 21 on both the upper and lower sides can be tightly attached to the partition plate 32. This not only improves the structural compactness of the battery cell 100, but also facilitates the assembly of the battery cell 100 and improves assembly efficiency.

[0057] Alternatively, when the thickness of the portion of the pole ear 21 located on the lower side of the partition plate 32 is larger, this portion of the pole ear 21 can push the partition plate 32 upward, so that the partition plate 32 moves in the direction away from the electrode assembly 20 and presses the upper portion of the pole ear 21, so that the pole ears 21 on the upper and lower sides can be tightly attached to the partition plate 32. This not only improves the structural compactness of the battery cell 100, but also facilitates the assembly of the battery cell 100 and improves assembly efficiency.

[0058] In summary, it can be understood that in the embodiment of the present invention, the separator 30 includes a frame 31 and a separator 32, the frame 31 is provided with a through hole 311 at a position corresponding to the pole lug 21, the separator 32 partially covers the through hole 311, the pole lug 21 on the electrode assembly 20 passes through the through hole 311 and is electrically connected to the pole assembly 40, and the pole lug 21 is partially clamped between the electrode assembly 20 and the separator 32, and / or the pole lug 21 is partially clamped between the pole assembly 40 and the separator 32. In this way, after assembly, the pole lug 21 can be tightly attached to the separator 30, avoiding a large gap between the pole lug 21 and the separator 30, thereby making the battery cell 100 structure more compact, which is conducive to increasing the volume of the electrode assembly 20 and the energy density of the battery.

[0059] Optionally, in one embodiment, the partition plate 32 is elastically connected to the frame 31 so as to move closer to the pole assembly 40 or the electrode assembly 20 under the pushing action of the tab 21. Figure 7 The periphery of the partition plate 32 includes a connecting section 321 and a free section 322 connected to each other. The connecting section 321 is fixedly connected to the frame 31, and the free section 322 is suspended. The extension length of the free section 322 is greater than or equal to the extension length of the connecting section 321, and the free section 322 is spaced apart from the frame 31.

[0060] Specifically, in Figure 7 In the structural scheme shown, the partition plate 32 is a rectangular plate, and one of the side edges of the partition plate 32 constitutes a connecting section 321 and is fixedly connected to the frame 31, and the other side edges constitute a free section 322 and are suspended. This ensures that the extension length of the free section 322 is greater than or equal to the extension length of the connecting section 321, and thus enables the partition plate 32 to form a paddle structure that can be bent and deformed up and down, and then when the partition plate 32 is bent under force, the partition plate 32 can partially approach the electrode assembly 20 or the pole assembly 40.

[0061] Please refer to Figure 3When the electrode assembly 20 presses a portion of the electrode tab 21 onto the partition plate 32 from bottom to top, the partition plate 32 can bend upward under the push of the electrode tab 21, and then the partition plate 32 further presses the portion of the electrode tab 21 located between the pole assembly 40 and the partition plate 32 onto the pole assembly 40, making the structure of the battery cell 100 more compact.

[0062] Similarly, when the pole assembly 40 presses a portion of the pole ear 21 onto the partition plate 32 from top to bottom, the partition plate 32 can bend downward under the push of the pole ear 21, and then the partition plate 32 further presses the portion of the pole ear 21 located between the electrode assembly 20 and the partition plate 32 onto the electrode assembly 20, making the structure of the battery cell 100 more compact.

[0063] It should be noted here that when the extension length of the free section 322 of the partition plate 32 is greater than or equal to the extension length of the connecting section 321, the partition plate 32 can form a paddle structure that can bend and deform up and down. At this time, the shape of the partition plate 32 can be flexibly set according to actual conditions. For example, the partition plate 32 can be a circular plate, an elliptical plate, a polygonal plate, etc., as long as the extension length of the free section 322 is greater than or equal to the extension length of the connecting section 321.

[0064] For example, in one embodiment, the partition plate 32 is polygonal and has multiple sides, one of which constitutes a connecting section 321 and the other sides constitute free sections 322. Figure 9 In the illustrated structural scheme, the partition plate 32 is quadrilateral and includes a connecting side 323 and three suspended side edges (note: the three suspended side edges include two anti-scratch side edges 324 and one free side edge 325). The connecting side edge 323 forms a connecting section 321 and is fixedly connected to the frame 31, while the three suspended side edges together form a free section 322 and are suspended in the air. As can be understood, this makes the structure of the partition plate 32 relatively simple.

[0065] It should also be noted that in order to achieve the solution of "at least a portion of the separator 32 can be moved closer to the pole assembly 40 or the electrode assembly 20 under the push of the pole tab 21", the separator 32 can also be slidably installed in the through-hole 311 along the axial direction of the through-hole 311, and then when the electrode assembly 20 presses a portion of the pole tab 21 against the separator 32 from bottom to top, the separator 32 can slide upward under the push of the pole tab 21, and then the separator 32 further presses the portion of the pole tab 21 located between the pole assembly 40 and the separator 32 against the pole assembly 40, making the structure of the battery cell 100 more compact. Similarly, when the pole assembly 40 presses a portion of the pole tab 21 against the separator 32 from top to bottom, the separator 32 can slide downward under the push of the pole tab 21, and then the separator 32 further presses the portion of the pole tab 21 located between the electrode assembly 20 and the separator 32 against the electrode assembly 20, making the structure of the battery cell 100 more compact.

[0066] Optionally, in one embodiment, as Figure 6 As shown, the via hole 311 is provided with a first shielding area 312 and a second shielding area 313 spaced apart. Figure 7 At least part of the first shielding area 312 and at least part of the second shielding area 313 are respectively covered by at least one partition plate 32, and a connecting gap 314 is formed between the partition plates 32 in the first shielding area 312 and the partition plates 32 in the second shielding area 313, and the tab 21 passes through the through hole 311 through the connecting gap 314.

[0067] Specifically, in this embodiment, Figure 4 As shown, the tab 21 includes an electrode connecting section 211, a pole connecting section 213 and an intermediate connecting section 212. Figure 3 The electrode connecting segment 211 is located between the partition plate 32 and the electrode assembly 20 and is electrically connected to the electrode assembly 20. The pole connecting segment 213 is located between the partition plate 32 and the pole assembly 40 and is electrically connected to the pole assembly 40. The intermediate connecting segment 212 is connected between the electrode connecting segment 211 and the pole connecting segment 213.

[0068] by Figure 3 With reference to the orientation indication in FIG, during the actual assembly process, the middle connecting section 212 may extend to the left or to the right, that is, after the assembly is completed, the middle connecting section 212 at least partially extends to the first shielding area 312 or the second shielding area 313.

[0069] In order to ensure that the middle connecting section 212 can be clamped between the pole connecting section 213 and the partition plate 32 regardless of whether it extends to the left or the right, in this embodiment, at least one partition plate 32 is respectively arranged in the first shielding area 312 and the second shielding area 313 of the through-hole 311, and a connecting gap 314 is formed between the partition plates 32 in the first shielding area 312 and the partition plates 32 in the second shielding area 313, and the pole ear 21 passes through the through-hole 311 through the connecting gap 314. This can ensure that the pole ear 21 can pass through the through-hole 311 and be connected to the pole assembly 40, and can also ensure that the middle connecting section 212 can be clamped between the pole connecting section 213 and the corresponding partition plate 32 regardless of whether it extends to the first shielding area 312 or the second shielding area 313, so that the structure of the battery cell 100 is more compact.

[0070] It should be noted that in order to make the structure of the partition frame 30 simpler, Figure 7 In the figure, a partition plate 32 is respectively provided in the first shielding area 312 and the second shielding area 313. The two partition plates 32 are spaced apart along the width direction of the frame 31, and a connecting gap 314 is formed between the two partition plates 32. The pole ear 21 passes through the through hole 311 through the connecting gap 314 and is connected to the pole assembly 40.

[0071] Optionally, in one embodiment, as Figure 3 As shown, the width of the connecting gap 314 is smaller than the extension length of the intermediate connecting section 212 between the electrode connecting section 211 and the pole connecting section 213. In this way, when the intermediate connecting section 212 extends toward the first shielding area 312 or the second shielding area 313, it can be attached to the partition plate 32 in the first shielding area 312 or the second shielding area 313, avoiding the situation where the intermediate connecting section 212 cannot be attached to the partition plate 32 due to the connecting gap 314 being too wide.

[0072] Optionally, in one embodiment, as Figure 5 or Figure 7 As shown, the first shielding area 312 and the second shielding area 313 are spaced apart along the width direction of the frame 31 , and in the width direction of the frame 31 , the partition plates 32 in the first shielding area 312 and the partition plates 32 in the second shielding area 313 are arranged with the same width.

[0073] Specifically, during actual assembly, the middle connecting section 212 may extend toward the first shielding area 312 or the second shielding area 313. In this embodiment, the widths of the two partitions are set to be the same, so that no matter which side the middle connecting section 212 extends to, the corresponding partition plate 32 has sufficient width to support the middle connecting section 212, thereby avoiding the situation where the middle connecting section 212 cannot be fully supported because one of the partition plates 32 is not wide enough.

[0074] Optionally, in one embodiment, please combine Figure 8 and Figure 3 The through hole 311 has a first orifice 315 and a second orifice 316 relative to each other, the first orifice 315 is closer to the electrode assembly 20 than the second orifice 316, the partition plate 32 is connected to the inner wall of the through hole 311, and a first accommodating cavity 317 is formed between the partition plate 32 and the first orifice 315, and the tab 21 is partially accommodated in the first accommodating cavity 317; and / or, a second accommodating cavity 318 is formed between the partition plate 32 and the second orifice 316, and the tab 21 is partially accommodated in the second accommodating cavity 318.

[0075] Specifically, in this embodiment, the partition plate 32 can be disposed at the second opening 316, thereby forming a first accommodating cavity 317 between the partition plate 32 and the first opening 315, without forming the second accommodating cavity 318. Alternatively, the partition plate 32 can be disposed at the first opening 315, thereby forming a second accommodating cavity 318 between the partition plate 32 and the second opening 316, without forming the first accommodating cavity 317. Alternatively, the partition plate 32 can be located between the first opening 315 and the second opening 316, forming both the first accommodating cavity 317 and the second accommodating cavity 318, with the first accommodating cavity 317 and the second accommodating cavity 318 being connected via the connecting gap 314.

[0076] During assembly, part of the tab 21 between the electrode assembly 20 and the separator 32 is accommodated in the first accommodation cavity 317 , and part of the tab 21 between the pole assembly 40 and the separator 32 is accommodated in the second accommodation cavity 318 .

[0077] It can be understood that by accommodating part of the tab 21 in the first accommodating cavity 317 and / or the second accommodating cavity 318, the structure of the battery cell 100 can be made more compact, which is conducive to increasing the volume of the electrode assembly 20 and thus increasing the energy density of the battery.

[0078] Optionally, in one embodiment, as Figure 9 As shown, on the basis that the partition plate 32 is connected to the inner wall of the through hole 311, the partition plate 32 includes a connecting side 323 constituting the connecting section 321 and an anti-scratch side 324 constituting a partial free section 322, the connecting side 323 is connected to the inner wall of the through hole 311, and the anti-scratch side 324 is spaced apart from the inner wall of the through hole 311.

[0079] Specifically, in this embodiment, the partition plate 32 includes a connecting side 323, two anti-scratch side edges 324 and a free side edge 325. The connecting side edge 323 constitutes a connecting section 321 and is connected to the inner wall of the through hole 311. The free side edge 325 is spaced apart from the connecting side edge 323. The two anti-scratch side edges 324 are respectively connected between the connecting side edge 323 and the free side edge 325, and the two anti-scratch side edges 324 are respectively spaced apart from the two inner walls of the through hole 311. This can avoid the partition plate 32 from scratching the inner wall of the through hole 311 when it is bent and deformed, thereby affecting the assembly problem.

[0080] Secondly, an embodiment of the present application further provides a battery pack, which includes a plurality of battery cells 100. The specific structure of the battery cells 100 refers to the above-mentioned embodiment. Since this battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0081] On the third aspect, the embodiments of the present application also provide an electrical device, which includes the above-mentioned battery pack, and the battery pack includes multiple battery cells 100. The specific structure of the battery cell 100 refers to the above-mentioned embodiments. Since this battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0082] Among them, electrical equipment can be vehicles, ships, industrial equipment, household appliances, etc.

[0083] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery cell, characterized in that: include: A housing having a mounting cavity; a pole assembly mounted on the housing; An electrode assembly is installed in the installation cavity, and a pole ear is provided on a side of the electrode assembly close to the pole assembly; as well as, A separator frame, comprising a frame body and a separator plate, wherein the frame body is at least partially disposed between the electrode assembly and the electrode column assembly, and the frame body is provided with a through hole at a position corresponding to the electrode lug, and the separator plate is connected to the frame body and located at the through hole, and the separator plate can move in a direction close to or away from the electrode assembly; The tab passes through the through hole and is electrically connected to the pole assembly, and the tab portion is clamped between the electrode assembly and the separator plate, and / or the tab portion is clamped between the pole assembly and the separator plate.

2. The battery cell according to claim 1, characterized in that The partition plate is elastically connected to the frame so as to move closer to the pole assembly or the electrode assembly under the pushing action of the pole lug.

3. The battery cell according to claim 2, characterized in that The periphery of the partition plate includes a connecting section and a free section connected to each other, the connecting section is fixedly connected to the frame, the free section is suspended, and the extension length of the free section is greater than or equal to the extension length of the connecting section.

4. The battery cell according to claim 3, characterized in that The partition plate is polygonal and has a plurality of side edges, wherein one of the side edges constitutes the connecting section, and the other side edges constitute the free sections, and the free sections are spaced apart from the frame.

5. The battery cell according to claim 1, characterized in that The via is provided with a first shielding area and a second shielding area which are spaced apart from each other, at least a portion of the first shielding area and at least a portion of the second shielding area are respectively covered by at least one partition plate, a connecting gap is formed between the partition plates in the first shielding area and the partition plates in the second shielding area, and the tab passes through the via through the connecting gap.

6. The battery cell according to claim 5, characterized in that The electrode tab includes an electrode connection section, a pole connection section, and an intermediate connection section, wherein the electrode connection section is located between the separator plate and the electrode assembly and is electrically connected to the electrode assembly, the pole connection section is located between the separator plate and the pole assembly and is electrically connected to the pole assembly, and the intermediate connection section is connected between the electrode connection section and the pole connection section, and the intermediate connection section at least partially extends toward the first shielding area or the second shielding area; The width of the connecting gap is smaller than the extending length of the intermediate connecting section between the electrode connecting section and the pole connecting section, so that when the intermediate connecting section extends toward the first shielding area or the second shielding area, it can be attached to the partition plate in the first shielding area or the second shielding area.

7. The battery cell according to any one of claims 1 to 6, characterized in that: The via has a first opening and a second opening facing each other, the first opening being closer to the electrode assembly than the second opening; The partition plate is connected to the inner wall of the through hole, and a first accommodating cavity is formed between the partition plate and the first orifice, and the pole ear portion is accommodated in the first accommodating cavity; and / or, a second accommodating cavity is formed between the partition plate and the second orifice, and the pole ear portion is accommodated in the second accommodating cavity.

8. The battery cell according to any one of claims 1 to 6, characterized in that: The partition plate includes a connecting side and an anti-scratch side. The connecting side is connected to the inner wall of the through hole, and the anti-scratch side is spaced apart and opposite to the inner wall of the through hole.

9. A battery pack, characterized in that: Comprising the battery cell according to any one of claims 1 to 8.

10. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 9.

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