CN220821851U - Battery and car - Google Patents

Abstract

The utility model provides a battery and an automobile, and relates to the technical field of energy storage devices. The welding of the positive pole and the positive pole current collecting disc can be realized outside the shell main body, the detectability after welding can be greatly improved, and the safety and the reliability of the battery are ensured; in addition, as the bottom wall of the first pole groove is subjected to laser penetration welding with the thicker current collecting disc boss, the whole positive current collecting disc is not easy to penetrate during penetration welding, and the safety and reliability of the battery are further improved.

Description

Battery and car

Technical Field

The utility model relates to the technical field of energy storage devices, in particular to a battery and an automobile.

Background

With the development of battery energy storage technology, various electric equipment has higher and higher requirements on energy storage batteries. Among them, cylindrical batteries, which are attracting attention due to their high capacity and low internal resistance, generally include a case integrated with a positive electrode post, a winding core assembly, a positive electrode current collecting plate, and the like. When the cylindrical battery is assembled, after the positive current collecting disc and the pole lug of the winding core are welded, the positive current collecting disc and the winding core are inserted from the other end of the shell in an opening way until the positive current collecting disc is abutted against the positive pole post, and then welding operation is carried out from a space provided by the central hole of the winding core so as to weld and fix the positive current collecting disc and the positive pole post, thereby realizing the electric connection between the positive current collecting disc and the positive pole post. However, since the welding space between the positive electrode current collecting disc and the positive electrode post is located inside the winding core, more specifically, at the central hole of the winding core, the size of the central hole of the winding core is limited, which results in narrow visual field, greatly increases the detection difficulty of welding quality, and further may make the safety and reliability of the battery difficult to be ensured.

Disclosure of utility model

The present utility model aims to improve the detectability of the welding of batteries.

In order to solve the above problems, the utility model provides a battery, which comprises a shell main body, a pole and a first current collecting disc, wherein a mounting hole is formed in one axial end of the shell main body, the pole is arranged at the mounting hole, at least part of the pole is positioned outside the shell main body, a first pole groove is formed in one end face of the pole, which is far away from the inside of the shell main body, the first current collecting disc is positioned in the shell main body, a current collecting disc boss is convexly arranged towards the pole, and the groove bottom wall of the first pole groove is used for being welded with the current collecting disc boss.

Compared with the prior art, the positive pole is integrated at one end of the shell main body, such as the positive pole, and the positive pole is specifically arranged at the mounting hole of the shell main body, and the positive pole can be completely positioned outside the shell main body or can be partially extended into the shell main body through the mounting hole. Since the positive electrode post is located at one end face outside the case main body, that is, the outer end face has the first electrode post groove opening outwards, at the same time, the first current collecting plate located inside the case main body, for example, the positive electrode current collecting plate is provided with a current collecting plate boss protruding toward the electrode post. In this way, the positive pole can at least partially extend into the shell main body from the mounting hole, in this case, the bottom wall of the first pole groove can extend into the shell main body, and can be welded with the boss of the positive current collecting disc, such as laser penetration welding, on the bottom wall of the first pole groove outside the shell main body, so as to fix the positive pole and the positive current collecting disc; or the positive pole post can be all located outside the shell main body, under the condition that the positive pole current collecting disc is provided with a current collecting disc boss and the shell main body is provided with a mounting hole, one end of the current collecting disc boss, which is far away from the positive pole current collecting disc, can extend out of the mounting hole and be in butt joint with the positive pole post, and then laser penetration welding can be carried out on the bottom wall of the groove of the first pole post and the current collecting disc boss of the positive pole current collecting disc outside the shell main body. Compared with the welding mode in the winding core, the battery can realize the welding of the positive pole column and the positive current collecting disc outside the shell main body, the detectability after welding can be greatly improved, the reliability of the electric connection between the positive pole column and the positive current collecting disc can be further ensured, and the safety and the reliability of the battery are also ensured; in addition, the bottom wall of the first pole groove is subjected to laser penetration welding with a common thicker current collecting disc boss, so that the whole positive current collecting disc is not easy to penetrate during penetration welding, the phenomenon of short circuit inside the battery is avoided, and the safety and reliability of the battery are further improved.

Further, a second pole groove with an opening facing the first collecting disc is formed in one end face of the pole facing the inside of the shell main body, and at least part of the collecting disc boss is located in the second pole groove and is abutted to the groove bottom wall of the second pole groove.

Further, the distance between the bottom wall of the first pole groove and the bottom wall of the second pole groove is D1, the dimension of the current collecting disc boss in the axial direction of the pole is D2, and D2 is more than or equal to D1.

Further, the battery further comprises a winding core, the winding core is located inside the shell main body, the first current collecting disc is welded to the lug of one end of the winding core, which faces the mounting hole, the current collecting disc boss is an annular boss, and the outer diameter of the annular boss is larger than the diameter of the central hole of the winding core.

Further, the tank bottom wall of the first pole groove is provided with a first through hole which axially penetrates through the pole, the battery further comprises a hole cover, the hole cover is used for being covered at the first through hole or/and the opening of the first pole groove, the first current collecting disc is provided with a second through hole, and the second through hole and the first through hole are coaxially arranged.

Further, the circumferential side wall of the first pole groove comprises a cylindrical section side wall and a circular truncated cone section side wall which are connected in the axial direction, the circular truncated cone section side wall is far away from the direction from one end to the other end of the cylindrical section side wall, the diameter of the circular truncated cone section side wall is in a decreasing trend, and the shape of the circumferential side wall of the hole cover is matched with the circular truncated cone section side wall.

Further, a portion of the pole is located outside the case body, and another portion of the pole is located inside the case body; the battery also comprises a riveting ring, one end of the pole column, which is positioned in the shell main body, is inserted into the riveting ring, and one end of the pole column, which is positioned in the shell main body, is in riveting press with a first annular boss which axially abuts against the riveting ring.

Further, the battery further comprises a first plastic ring, one end of the pole, which is located outside the shell body, protrudes radially and is provided with a second annular boss, the outer diameter of the second annular boss is larger than the diameter of the mounting hole, and at least part of the first plastic ring is arranged between the second annular boss and the outer wall of the shell body.

Further, the battery further comprises an insulating tape and a winding core, wherein the winding core is positioned in the shell main body, the first current collecting disc is welded at the lug of one end of the winding core, which faces the mounting hole, and the insulating tape is wrapped at one end of the winding core, which faces the mounting hole, and the outer ring wall of the first current collecting disc.

The utility model also provides an automobile comprising the battery.

Since technical improvements and technical effects of the automobile are the same as those of the battery, the automobile will not be described in detail.

Drawings

Fig. 1 is a schematic view of a battery according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the partial structure at A in FIG. 1;

FIG. 3 is a schematic view of the mounting structure of the pole and the housing body;

fig. 4 is a schematic view of a partial structure at B in fig. 1.

Reference numerals illustrate:

1. A pole; 11. a first pole groove; 111. a cylindrical section side wall; 112. the side wall of the round platform section; 12. a second post recess; 13. a first through hole; 14. a first laser penetration welding mark; 15. a first annular boss; 16. a second annular boss; 2. a case main body; 21. a mounting hole; 3. a first collecting tray; 31. a collecting disc boss; 32. a second through hole; 4. a hole cover; 41. a second laser welding; 5. a winding core; 61. riveting rings; 62. a first plastic ring; 63. a seal ring; 64. a second plastic ring; 65. a second collecting tray; 66. a shell cover plate; 661. third laser penetration welding; 662. fourth laser welding; 67. an insulating tape.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Moreover, in the drawings, the Z axis represents the vertical direction, that is, the up-down direction, and the positive direction of the Z axis represents the up, and the negative direction of the Z axis represents the down. It should also be noted that the foregoing Z-axis is provided merely for convenience of description and to simplify the description and is not to be construed as indicating or implying that the apparatus or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present utility model.

Referring to fig. 1-3, a battery according to an embodiment of the present utility model includes a case main body 2, a pole 1 and a first current collecting plate 3, wherein a mounting hole 21 is provided at one axial end of the case main body 2, the pole 1 is disposed at the mounting hole 21, at least a portion of the pole 1 is located outside the case main body 2, a first pole groove 11 is provided at an end surface of the pole 1, which is far from the inside of the case main body 2, the first current collecting plate 3 is located in the case main body 2, a current collecting plate boss 31 is provided to protrude from the first current collecting plate 3 toward the pole 1, and a groove bottom wall of the first pole groove 11 is used for welding with the current collecting plate boss 31.

In this embodiment, compared with the prior art, the terminal 1 is also integrated at one end of the case body 2, for example, the positive terminal 1, and the positive terminal 1 is specifically mounted at the mounting hole 21 of the case body 2, and the positive terminal 1 may be located entirely outside the case body 2 or may extend into the case body 2 from the mounting hole 21. Since the positive electrode tab 1 has the first tab recess 11 opening outwardly at one end face, i.e., the outer end face, of the exterior of the case body 2, at the same time, the first current collecting plate 3, e.g., the positive electrode current collecting plate, located inside the case body 2 is provided with the current collecting plate boss 31 protruding toward the electrode tab 1. In this way, the positive electrode column 1 may extend into the interior of the case main body 2 at least partially from the mounting hole 21, in which case, the bottom wall of the first electrode column groove 11 may extend into the interior of the case main body 2, and the bottom wall of the first electrode column groove 11 may be welded with the current collecting disc boss 31 of the positive electrode current collecting disc outside the case main body 2, for example, laser penetration welding is performed to fix the positive electrode column 1 and the positive electrode current collecting disc; or the positive pole 1 may be located outside the case main body 2, and when the positive current collecting plate has the current collecting plate boss 31 and the case main body 2 has the mounting hole 21, one end of the current collecting plate boss 31 away from the positive current collecting plate may extend out of the mounting hole 21 and abut against the positive pole 1, and further, laser penetration welding may be performed on the bottom wall of the first pole groove 11 and the current collecting plate boss 31 of the positive current collecting plate outside the case main body 2. Compared with the welding mode in the winding core 5, the battery of the embodiment can realize the welding of the positive pole 1 and the positive current collecting disc outside the shell main body 2, the detectability after welding can be greatly improved, the reliability of the electric connection of the positive pole 1 and the positive current collecting disc can be further ensured, and the safety and the reliability of the battery are also ensured; in addition, since the bottom wall of the first pole groove 11 is laser penetration welded with the current collecting disc boss 31 which is generally thicker, the whole positive current collecting disc is not easy to penetrate during penetration welding, so that the short circuit phenomenon in the battery is avoided, and the safety and reliability of the battery are further improved.

If the positive electrode current collecting plate is penetrated during welding, a short circuit occurs inside the battery.

As shown in fig. 2, after the groove bottom wall of the first pole groove 11 and the current collecting disc boss 31 are welded together by laser penetration, a first laser penetration welding mark 14 is formed. Due to the existence of the current collecting disc boss 31, the bottom wall of the first pole groove 11 and the current collecting disc boss 31 are not easy to penetrate through the whole positive current collecting disc when in penetration welding, which means that the bottom end of the first laser penetration welding mark 14 is higher than the topmost end of the winding core 5.

Referring to fig. 3, optionally, a second post recess 12 is provided at an end surface of the post 1 away from the first post recess 11, that is, a second post recess 12 opened toward the first collecting tray 3 is provided at an end surface facing the inside of the case body 2, and at least a portion of the collecting tray boss 31 is located in the second post recess 12 and abuts against a bottom wall of the second post recess 12, that is, a thickness D2 of the collecting tray boss 31 is greater than or equal to a depth H of the second post recess 12.

In this embodiment, the bottom end of the pole 1 may also be provided with the second pole groove 12, which on one hand may make the depth of the first pole groove 11 shallower, so as to facilitate the welding operation, and on the other hand, after at least part of the current collecting disc boss 31 is placed in the second pole groove 12, the second pole groove 12 may provide a preliminary positioning before welding for the current collecting disc boss 31 and even the first current collecting disc 3, so as to facilitate subsequent welding, and on the other hand, may improve the integration level of the first current collecting disc 3 and the pole 1, so as to facilitate improving the energy density of the battery. From the viewpoint of improving the integration, it is preferable that the thickness D2 of the current collecting plate boss 31 is equal to the depth H of the second pole groove 12 as shown in fig. 2.

Referring to fig. 2 and 3, optionally, a distance between a bottom wall of the first pole groove 11 and a bottom wall of the second pole groove 12 is D1, a dimension of the collecting disc boss 31 in an axial direction of the pole 1 is D2, and D2 is equal to or greater than D1.

In this embodiment, the portion between the first positive electrode column 1 groove and the second electrode column groove 12 may be denoted as a polar thin plate, and the distance between the bottom wall of the first polar column groove 11 and the bottom wall of the second electrode column groove 12 is D1, that is, the thickness of the polar thin plate is D1 and D1 is less than or equal to D2, so when the laser penetration welding is performed from the outside of the case main body 2, the welding direction is from the thinner polar thin plate to the thicker current collecting disc boss 31, and the laser penetration welding manner from thin to rear is easier to implement, the operation difficulty is intersected, and the welding yield is high.

Referring to fig. 2 and 3, in particular, a portion of the pole 1 is located outside the case body 2, and another portion of the pole 1 is located inside the case body 2; the battery further comprises a riveting ring 61, one end of the pole 1, which is positioned in the shell main body 2, is inserted into the riveting ring 61, and a first annular boss 15 which is axially abutted against the riveting ring 61 is formed at one end of the pole 1, which is positioned in the shell main body 2, in a riveting manner.

In this embodiment, the pole 1 is not entirely located outside the case main body 2, but rather, a portion of the pole 1 extends into the mounting hole 21, that is, the bottom end of the pole 1 is located inside the case main body 2, so that the bottom end of the pole 1 can be riveted and fixed with the riveting ring 61 inside the case main body. Specifically, the pole 1 may be equivalent to a rivet, after the bottom end of the pole 1 is inserted into the riveting ring 61 inside the housing body 2 through the mounting hole 21, the bottom end of the pole 1 may be deformed by riveting under heat to form a first annular boss 15 axially abutting against the riveting ring 61, the first annular boss 15 may axially fix the riveting ring 61 at the inner wall of the axial end of the housing body 2, and the pole 1 may not be separated from the mounting hole 21.

Referring to fig. 1 to 3, specifically, the battery further includes a winding core 5, the winding core 5 is located inside the case body 2, the first current collecting plate 3 is welded to a tab of one end of the winding core 5 facing the mounting hole 21, the current collecting plate boss 31 is an annular boss, and an outer diameter of the annular boss is larger than a diameter of a central hole of the winding core 5.

In the prior art, the two ends of the winding core are usually provided with tabs, the positive current collecting disc is positioned at one end of the winding core and welded with the tabs at the end, the negative current collecting disc is positioned at the other end of the winding core and welded with the tabs at the section, and the winding core is usually a winding structure, and after winding and forming, the winding core is internally provided with a central hole. Here, the first collecting disc 3, for example, the positive electrode collecting disc is welded to the top end of the winding core 5 and is welded to the tab at the top end of the winding core 5, and the collecting disc boss 31 is an annular boss having an outer diameter larger than the diameter of the central hole of the winding core 5. Therefore, after the groove bottom wall of the first pole groove 11 and the annular boss are subjected to laser penetration welding, the diameter of the formed first laser penetration welding mark 14 can be larger than that of the central hole of the winding core 5, and compared with the traditional welding mode in the winding core 5, the welding area of the pole 1 and the positive electrode current collecting disc is larger, and the internal resistance of the battery is lower. The inner diameter of the annular boss can be smaller than the diameter of the central hole of the winding core 5, or larger than or equal to the diameter of the central hole of the winding core 5, and can be selected according to practical situations.

Referring to fig. 2 and 3, specifically, a first through hole 13 axially penetrating through the pole 1 is provided on a bottom wall of the first pole groove 11, the battery further includes a hole cover 4, the hole cover 4 is used for covering the first through hole 13 or/and an opening of the first pole groove 11, the first collecting tray 3 is provided with a second through hole 32, and the second through hole 32 and the first through hole 13 are coaxially disposed.

Here, the electrolyte may be injected into the case main body 2 through the first through hole 13 of the positive electrode post 1 and the second through hole 32 of the first current collecting plate 3, and after the electrolyte is injected, the opening of the first through hole 13 and/or the first electrode post groove 11 may be covered by the hole cover 4 to achieve sealing.

Referring to fig. 2 and 3, optionally, the circumferential side wall of the first pole groove 11 includes a cylindrical section side wall 111 and a truncated cone section side wall 112 that are connected in an axial direction, and, from one end of the truncated cone section side wall 112 away from the cylindrical section side wall 111 to the other end, the diameter of the truncated cone section side wall 112 is in a decreasing trend, and the shape of the circumferential side wall of the hole cover 4 matches with the truncated cone section side wall 112.

Here, the circumferential side wall of the first pole groove 11 includes a cylindrical section side wall 111 and a circular truncated cone section side wall 112, the hole cover 4 is equivalent to a circular truncated cone cover, which may be placed at the circular truncated cone section side wall 112 first, the circular truncated cone section side wall 112 supports and positions the hole cover 4 before welding, and then the hole cover 4 and the circular truncated cone section side wall 112 are welded and fixed, and the second laser welding mark 41 as shown in fig. 2 is formed.

Referring to fig. 2 and 3, the battery optionally further includes a first plastic ring 62, one end of the pole 1 located outside the case body 2 is radially protruded with a second annular boss 16, an outer diameter of the second annular boss 16 is larger than a diameter of the mounting hole 21, and at least a portion of the first plastic ring 62 is disposed between the second annular boss 16 and an outer wall of the case body 2.

Here, the battery may be a cylindrical battery in which the case body 2 is generally made of steel, and insulation between the pole 1 and the case body 2 can be achieved by providing a first plastic ring 62 between the second annular boss 16 and the top end outer wall of the case body 2.

Referring to fig. 2 and 3, the battery further includes a seal ring 63, a portion of the seal ring 63 is disposed between the terminal post 1 and the inner wall of the mounting hole 21, and another portion of the seal ring 63 is disposed between the second annular boss 16 and the outer wall of the case main body 2. In this way, the sealing performance of the case main body 2 at the mounting hole 21 can be ensured.

The battery further comprises a second plastic ring 64, the second plastic ring 64 is sleeved on the pole 1, and two axial ends of the second plastic ring 64 are respectively abutted against the riveting ring 61 and the inner wall of the shell main body 2, and/or the riveting ring 61 is made of aluminum.

Specifically, the riveting ring 61 can be an aluminum ring, can make things convenient for the bottom riveting of utmost point post 1 to can realize that utmost point post 1 bottom riveting forms first annular boss 15, the bottom face of aluminum material riveting ring 61 also can upwards sunken because of pressure forms the recess, with first annular boss 15 of holding, finally can make the bottom face of riveting ring 61 and the bottom face parallel and level of utmost point post 1, improve the utilization ratio of shell main part 2 inner space, promoted the energy density of battery. In the case that the rivet ring 61 is an aluminum ring, the battery may further include a second plastic ring 64, when the pole 1 is mounted, the first plastic ring 62 and the sealing ring 63 may be first sleeved on the pole 1 to form a first assembly, and the first assembly is inserted into the mounting hole 21 from top to bottom until the first plastic ring 62 and the sealing ring 63 are axially abutted against the case body 2 by the second annular boss 16, then the first plastic ring 62 is installed on the case body 2 from the case opening at the bottom end of the case body 2 and sleeved on the pole 1, then the rivet ring 61 is installed on the case body 2 from the case opening and sleeved on the bottom end of the pole 1, and then the first annular boss 15 is used for pressing and fixing the rivet ring 61, the second plastic ring 64, the sealing ring 63 and the first plastic ring 62 in the axial direction, wherein the second plastic ring 64 is used for insulating the rivet ring 61 from the case body 2.

Referring to fig. 2 and 3, the battery optionally further includes a second current collecting plate 65 and a cover plate 66, the winding core 5 is located inside the case main body 2, the first current collecting plate 3 is welded to the tab of the winding core 5 facing one end of the mounting hole 21, the end of the case main body 2 away from the mounting hole 21 is provided with a case opening, the second current collecting plate 65 is used for welding with the tab of the winding core 5 facing away from one end of the first current collecting plate 3, and the cover plate 66 is used for covering the case opening.

Here, during the foregoing process of mounting the pole 1, the second collecting plate 65 is welded to the tab at the bottom end of the winding core 5, and the second collecting plate 65 and the first collecting plate 3 enter the case body 2 together with the winding core 5. After the pole 1 is installed, the shell cover 66 can be covered at the opening of the shell at the bottom end of the shell main body 2, the shell cover 66 and the cathode current collecting disc can be subjected to laser penetration welding to form a third laser penetration welding mark 661 shown in fig. 4, and then the edge of the shell cover 66 and the shell main body 2 are welded and fixed to form a fourth laser welding mark 662 shown in fig. 4. The material of the case cover 66 is the same as that of the case main body 2, and is used as the negative electrode column 1 of the battery.

Here, the pole 1 may be provided with a third through hole (not shown) at the cover plate 66 instead of the first through hole 13, and the liquid may be injected into the case main body 2 through the third through hole when the liquid is injected, and the hole cover 4 may be covered at the third hole cover 4.

As shown in fig. 1, after the positive current collecting disc is welded with the tab at the top end of the winding core 5, an insulating tape 67 may be wrapped on the top end of the winding core 5 and the outer ring of the positive current collecting disc, so as to prolong the ion channel between the positive current collecting disc and the shell main body 2 or the riveting ring 61, and further ensure the insulation between the positive current collecting disc and the shell main body 2 and the riveting ring 61 as much as possible.

Another embodiment of the utility model also provides an automobile comprising a battery as described above.

Since technical improvements and technical effects of the automobile are the same as those of the battery, the automobile will not be described in detail.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" and "a second" may explicitly or implicitly include at least one such feature.

Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the disclosure.

Claims (10)

1. The utility model provides a battery, its characterized in that, includes shell main part (2), utmost point post (1) and first current collecting disc (3), the axial one end of shell main part (2) is provided with mounting hole (21), utmost point post (1) set up in mounting hole (21) department, just at least part of utmost point post (1) is located the outside of shell main part (2), utmost point post (1) are kept away from the inside terminal surface of shell main part (2) is provided with first utmost point post recess (11), first current collecting disc (3) are located in shell main part (2), just first current collecting disc (3) orientation utmost point post (1) protrusion is provided with current collecting disc boss (31), the tank bottom wall of first utmost point post recess (11) be used for with current collecting disc boss (31) welding.

2. The battery according to claim 1, characterized in that an end face of the pole (1) facing the inside of the case body (2) is provided with a second pole recess (12) opening toward the first collector plate (3), and at least part of the collector plate boss (31) is located in the second pole recess (12) and abuts against a groove bottom wall of the second pole recess (12).

3. The battery according to claim 2, wherein the distance between the bottom wall of the first pole groove (11) and the bottom wall of the second pole groove (12) is D1, the dimension of the current collecting plate boss (31) in the axial direction of the pole (1) is D2, and D2 is equal to or greater than D1.

4. The battery according to claim 1, further comprising a winding core (5), wherein the winding core (5) is located inside the case main body (2), and the first current collecting plate (3) is welded to a tab at one end of the winding core (5) facing the mounting hole (21), the current collecting plate boss (31) is an annular boss, and an outer diameter of the annular boss is larger than a diameter of a center hole of the winding core (5).

5. The battery according to claim 1, characterized in that the bottom wall of the first pole groove (11) is provided with a first through hole (13) penetrating the pole (1) axially, the battery further comprises a hole cover (4), the hole cover (4) is used for being covered at the first through hole (13) or/and at the opening of the first pole groove (11), the first collecting disc (3) is provided with a second through hole (32), and the second through hole (32) is coaxially arranged with the first through hole (13).

6. The battery according to claim 5, characterized in that the peripheral side wall of the first pole groove (11) includes a cylindrical section side wall (111) and a truncated cone section side wall (112) connected in the axial direction, and the diameter of the truncated cone section side wall (112) is in a decreasing trend from one end to the other end of the truncated cone section side wall (112) away from the cylindrical section side wall (111), and the shape of the peripheral side wall of the hole cover (4) matches the truncated cone section side wall (112).

7. The battery according to claim 1, characterized in that a part of the pole (1) is located outside the case body (2), and another part of the pole (1) is located inside the case body (2); the battery further comprises a riveting ring (61), one end of the pole (1) positioned inside the shell main body (2) is inserted into the riveting ring (61), and one end of the pole (1) positioned inside the shell main body (2) is in riveting pressing to form a first annular boss (15) which axially abuts against the riveting ring (61).

8. The battery according to claim 7, further comprising a first plastic ring (62), wherein one end of the terminal post (1) located outside the case main body (2) is provided with a second annular boss (16) in a radially protruding manner, an outer diameter of the second annular boss (16) is larger than a diameter of the mounting hole (21), and at least part of the first plastic ring (62) is arranged between the second annular boss (16) and an outer wall of the case main body (2).

9. The battery according to claim 1, further comprising an insulating tape (67) and a winding core (5), wherein the winding core (5) is located inside the case main body (2), and the first current collecting disk (3) is welded to a tab at one end of the winding core (5) facing the mounting hole (21), and the insulating tape (67) is wrapped around one end of the winding core (5) facing the mounting hole (21) and an outer ring wall of the first current collecting disk (3).

10. An automobile comprising a battery according to any one of claims 1-9.