Battery

Abstract

The present invention relates to the technical field of batteries, and proposes a battery, comprising: a cover plate assembly, the cover plate assembly comprising a cover plate and a first adapter, a first fold formed between the first section and the third section, a second fold formed between the second section and the third section, the first section being fixedly connected to the cover plate; a cylindrical battery cell, a first pole ear being fixedly electrically connected to the second section, the first section and the third section being located on the side of the second section away from the battery cell body; the cover plate and the first adapter being bent along the first fold so that when the plane where the large surface of the cover plate is located is perpendicular to the plane where the end face of the battery cell body extending from the first pole ear is located, the orthographic projection of the cover plate toward the plane where the end face is located does not coincide with the end face, that is, during the assembly process of the cover plate assembly and the battery cell, interference between the cover plate and the battery cell body can be avoided, and deformation of the internal structure of the cylindrical battery cell under stress can be avoided, thereby effectively improving the safe use performance of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery. Background Art

[0002] In the related art, the cover assembly of the battery can be connected to the tab of the battery cell. Due to the structural limitations of the cover assembly, component interference may occur during the installation of the cover assembly, which is not conducive to improving the assembly efficiency of the battery. Summary of the Invention

[0003] The present invention provides a battery to improve the performance of the battery.

[0004] The present invention provides a battery, comprising:

[0005] The cover plate assembly includes a cover plate and a first adapter, the first adapter is bent into a first section, a second section, and a third section, the third section is arranged between the first section and the second section, a first fold is formed between the first section and the third section, a second fold is formed between the second section and the third section, and the first section is fixedly connected to the cover plate;

[0006] A cylindrical battery cell, comprising a battery body and a first tab extending from at least one end of the battery body, wherein the first tab is fixedly electrically connected to the second section, and the first section and the third section are located on a side of the second section facing away from the battery body;

[0007] Among them, when the cover plate and the first adapter are bent along the first fold so that the plane where the large surface of the cover plate is located is perpendicular to the plane where the end face of the battery cell body extending from the first pole ear is located, the orthographic projection of the cover plate toward the plane where the end face is located does not coincide with the end face.

[0008] A battery according to an embodiment of the present invention includes a cover plate assembly and a cylindrical battery cell, the cover plate assembly and the cylindrical battery cell being electrically connected. The cover plate assembly includes a cover plate and a first adapter, the first adapter being bent into a first section, a second section, and a third section. A first fold is formed between the first and third sections, and a second fold is formed between the second and third sections. The first section is fixedly connected to the cover plate, and the second section is fixedly electrically connected to the first tab of the cylindrical battery cell. The first and third sections are located on the side of the second section facing away from the battery cell body, thereby effectively improving the battery's space utilization. The cover plate and the first adapter are bent along the first fold so that when the plane containing the cover plate's large surface is perpendicular to the plane containing the end face of the battery cell body extending from the first tab, the orthographic projection of the cover plate toward the plane containing the end face does not coincide with the end face. This prevents interference between the cover plate and the battery cell during assembly of the cover plate assembly and the battery cell, avoids deformation of the cylindrical battery cell's internal structure due to stress, and avoids the risk of internal short circuit caused by inverted insertion of the first tab, thereby effectively improving the battery's safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present disclosure. Furthermore, related elements or components may have different arrangements as is known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components throughout the various figures.

[0010] in:

[0011] Figure 1 is a schematic structural diagram of a battery according to an exemplary embodiment;

[0012] Figure 2 is a schematic diagram of an exploded structure of a battery according to an exemplary embodiment;

[0013] Figure 3 is a schematic diagram of a partial structure of a battery according to an exemplary embodiment;

[0014] Figure 4 is a schematic diagram of a partially exploded structure of a battery according to an exemplary embodiment;

[0015] Figure 5 is a structural schematic diagram showing a partial structure of a battery from one perspective according to an exemplary embodiment;

[0016] Figure 6 is a structural schematic diagram showing a partial structure of a battery from another perspective according to an exemplary embodiment;

[0017] Figure 7 is a schematic structural diagram of a first adapter and an adhesive layer of a battery according to an exemplary embodiment;

[0018] Figure 8 is a schematic structural diagram of a first adapter of a battery according to an exemplary embodiment;

[0019] Figure 9 is a schematic diagram of an expanded structure of a battery from one perspective according to an exemplary embodiment;

[0020] Figure 10 is a schematic diagram of an expanded structure of a battery from another perspective according to an exemplary embodiment;

[0021] Figure 11 is a schematic diagram of an expanded structure of a first adapter of a battery from one perspective according to an exemplary embodiment;

[0022] Figure 12FIG1 is a schematic diagram of the expanded structure of a first adapter of a battery from another perspective according to an exemplary embodiment.

[0023] The following are the descriptions of the reference numerals:

[0024] 10. Cover plate; 20. First adapter; 21. First section; 22. Second section; 221. Welding area; 23. First fold; 24. Second fold; 25. Third section; 251. Reinforcement; 26. Notch; 30. Cylindrical battery cell; 31. Battery cell body; 311. End face; 32. First pole tab; 33. Second pole tab; 40. Second adapter; 50. Pole assembly; 60. Insulator; 61. Accommodating cavity; 70. Adhesive layer; 80. Shell member. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0026] In the description of this disclosure, unless otherwise expressly provided or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" or "an" object is also intended to mean one of a possible plurality of such objects.

[0027] Unless otherwise specified or explained, the terms "connect," "fixed," etc. should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; and "connected" may refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0028] Furthermore, in the description of the present disclosure, it should be understood that the directional words such as “upper”, “lower”, “inner” and “outer” described in the example embodiments of the present disclosure are described based on the angles shown in the accompanying drawings and should not be understood as limiting the example embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) “upper”, “lower”, or “inner” or “outer”, it can not only be directly connected to the other (one or more) elements “upper”, “lower” or “inner” or “outer”, but can also be indirectly connected to the other (one or more) elements “upper”, “lower” or “inner” or “outer” through an intermediate element.

[0029] One embodiment of the present invention provides a battery, please refer to Figures 1 to 12 The battery includes: a cover assembly, the cover assembly includes a cover 10 and a first adapter 20, the first adapter 20 is bent into a first section 21, a second section 22 and a third section 25, the third section 25 is arranged between the first section 21 and the second section 22, a first fold 23 is formed between the first section 21 and the third section 25, a second fold 24 is formed between the second section 22 and the third section 25, the first section 21 is fixedly connected to the cover 10; a cylindrical battery cell 30, the cylindrical battery cell 30 includes a battery cell body 31 and a battery cell body. A first tab 32 extends from at least one end of the main body 31, and the first tab 32 is fixedly electrically connected to the second section 22. The first section 21 and the third section 25 are located on the side of the second section 22 that is away from the battery cell main body 31. The cover plate 10 and the first adapter 20 are bent along the first fold 23 so that when the plane where the large surface of the cover plate 10 is located is perpendicular to the plane where the end face 311 from which the first tab 32 extends from the battery cell main body 31 is located, the orthographic projection of the cover plate 10 toward the plane where the end face 311 is located does not coincide with the end face 311.

[0030] A battery according to one embodiment of the present invention includes a cover plate assembly and a cylindrical battery cell 30, which are electrically connected. The cover plate assembly includes a cover plate 10 and a first adapter 20. The first adapter 20 is bent into a first section 21, a second section 22, and a third section 25. A first fold 23 is formed between the first section 21 and the third section 25, and a second fold 24 is formed between the second section 22 and the third section 25. The first section 21 is fixedly connected to the cover plate 10, and the second section 22 is fixedly electrically connected to the first tab 32 of the cylindrical battery cell 30. The first section 21 and the third section 25 are located on the side of the second section 22 facing away from the battery cell body 31, thereby effectively improving the space utilization of the battery. When the cover plate 10 and the first adapter 20 are bent along the first fold 23 so that the plane where the large surface of the cover plate 10 is located is perpendicular to the plane where the end face 311 of the battery cell body 31 extends from the first pole ear 32, the orthographic projection of the cover plate 10 toward the plane where the end face 311 is located does not coincide with the end face 311, that is, during the assembly process of the cover plate assembly and the cylindrical battery cell 30, interference between the cover plate 10 and the battery cell body 31 can be avoided, deformation of the internal structure of the cylindrical battery cell 30 due to stress, and the risk of inverted insertion of the first pole ear 32 causing internal short circuit of the battery, thereby effectively improving the safe use performance of the battery.

[0031] It should be noted that the first adapter 20 is bent into a first section 21, a second section 22 and a third section 25. The first section 21 and the second section 22 are respectively provided at both ends of the third section 25. A first fold 23 is formed between the first section 21 and the third section 25, and a second fold 24 is formed between the second section 22 and the third section 25. That is, the first section 21 and the third section 25 can be bent through the first fold 23, and the second section 22 and the third section 25 can be bent through the second fold 24. During the installation process, the first section 21, the second section 22 and the third section 25 can be bent through the first fold 23 and the second fold 24, thereby facilitating the installation of the first adapter 20.

[0032] The first section 21 is fixedly connected to the cover plate 10. The first section 21 and the cover plate 10 can be directly fixedly connected. In this case, the first section 21 and the cover plate 10 can be electrically connected. Alternatively, the first section 21 and the cover plate 10 can be indirectly fixedly connected. The first section 21 and the cover plate 10 can be electrically connected. The first section 21 and the cover plate 10 can also be insulated.

[0033] The cylindrical battery cell 30 includes a battery body 31 and a first tab 32 extending from at least one end of the battery body 31. The first tab 32 is fixedly electrically connected to the second section 22, thereby enabling the first tab 32 to be electrically connected through the first adapter 20. The first tab 32 and the second section 22 can be welded, or connected by conductive adhesive, or mechanically connected.

[0034] The large surface of the cover plate 10 refers to the surface of the cover plate 10 with the largest area. For example, when the cover plate 10 is circular, the large surface of the cover plate is the end surface of the circle.

[0035] In one embodiment, combined Figure 4 and Figure 8 As shown, the first section 21 and the third section 25 are located on the same plane and are located on the side of the second section 22 away from the battery cell body 31. That is, after the battery is installed, the first section 21 and the third section 25 are not bent by the first fold 23. Only the first fold 23 is provided between the first section 21 and the third section 25. The first section 21 and the second section 22 are arranged relative to each other in an upper and lower direction, thereby improving the space utilization of the battery and ensuring the energy density of the battery.

[0036] When the cover 10 and the first adapter 20 rotate along the first fold 23 and the second fold 24 until the second section 22 and the third section 25 are on the same plane, the plane where the large surface of the cover 10 is located is perpendicular to the plane where the end surface 311 of the battery cell body 31 extending from the first tab 32 is located.

[0037] Combine Figures 9 to 12 As shown, the cover plate 10 and the first adapter 20 are rotated along the first fold 23 and the second fold 24 until the second section 22 and the third section 25 are located on the same plane, and the plane where the large surface of the cover plate 10 is located is perpendicular to the plane where the end face 311 of the battery cell body 31 extends from the first pole ear 32, the orthographic projection of the cover plate 10 toward the plane where the end face 311 is located does not coincide with the end face 311, that is, during the process of fixing the second section 22 to the first pole ear 32, the second section 22 and the third section 25 can be located on the same plane, while the first section 21 is perpendicular to The second section 22 and the third section 25, at this time, a bend is formed between the first section 21 and the third section 25 through the first fold 23, and the second fold 24 is not bent. In this state, the second section 22 is connected to the first pole ear 32, which can effectively avoid interference between the cover plate 10 and the battery body 31, and avoid the internal structure of the cylindrical battery cell 30 from being deformed by force, thereby avoiding excessive accidental squeezing of the first pole ear 32, and avoiding the risk of the first pole ear 32 being inserted upside down and causing an internal short circuit in the battery, thereby effectively improving the safe use performance of the battery.

[0038] The first section 21 and the third section 25 are located on the same plane, and the second section 22 and the third section 25 are located on the same plane. Here, it means that the first section 21 and the third section 25 are basically located on the same plane, and the second section 22 and the third section 25 are basically located on the same plane.

[0039] In one embodiment, the first section 21 is parallel to the end surface 311 , which not only facilitates the installation of the cover assembly but also effectively utilizes the space of the battery, thereby improving the energy density of the battery.

[0040] The first section 21 is parallel to the end surface 311 , which does not exclude the possibility of a certain angle between the first section 21 and the end surface 311 , that is, the emphasis here is on explaining that the first section 21 is substantially parallel to the end surface 311 .

[0041] In one embodiment, combined Figure 9 and Figure 12 As shown, the second section 22 is welded to the first pole tab 32 to form a welding area 221 on the second section 22. After the first adapter 20 is straightened, the first fold 23 and the second fold 24 are parallel, and along the preset direction, the distance a between the first fold 23 and the second fold 24 is smaller than the dimension b of the welding area 221. The preset direction is perpendicular to the first fold 23. This not only ensures that during the installation of the cover assembly, the positive projection of the cover 10 toward the plane where the end face 311 is located does not coincide with the end face 311, but also ensures that the welding area 221 formed by the second section 22 and the first pole tab 32 can improve the connection strength between the second section 22 and the first pole tab 32, thereby ensuring the connection stability between the second section 22 and the first pole tab 32.

[0042] In one embodiment, the distance between the first fold 23 and the second fold 24 is a, the size of the welding area 221 is b, and a / b is 0.1-0.6. On the basis of effectively controlling the distance between the first fold 23 and the second fold 24, the connection of the first adapter 20 can be facilitated, and the connection stability between the second section 22 and the first tab 32 can be ensured, thereby improving the safe use performance of the battery.

[0043] Combine Figure 12 As shown, the distance between the first fold 23 and the second fold 24 can be expressed as a, the size of the welding area 221 can be expressed as b, and the ratio of the distance a between the first fold 23 and the second fold 24 to the size b of the welding area 221 can be 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55 or 0.6, etc.

[0044] The preset direction is the arrangement direction of the first fold 23 and the second fold 24 .

[0045] In one embodiment, the distance between the first fold 23 and the second fold 24 is a, and a is 1.5 mm-5 mm, so that the bending position of the cover assembly during installation can be effectively controlled, interference between the cover 10 and the battery cell body 31 can be avoided, and the internal structure of the cylindrical battery cell 30 can be avoided from being deformed by force, and the risk of the first pole ear 32 being inserted upside down, causing an internal short circuit in the battery, thereby effectively improving the safe use performance of the battery.

[0046] The distance a between the first fold 23 and the second fold 24 can be 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, etc.

[0047] In one embodiment, the orthographic projection of the second fold 24 toward the plane where the end surface 311 is located coincides with the end surface 311 , thereby effectively utilizing the space of the battery and improving the energy density of the battery.

[0048] The orthographic projections of the first fold 23 and the second fold 24 toward the plane where the end face 311 is located coincide with the end face 311, thereby preventing the first adapter 20 from increasing the circumferential space of the battery, improving the space utilization of the battery to a certain extent, and effectively increasing the energy density of the battery.

[0049] In one embodiment, the orthographic projections of the second fold 24 and the first tab 32 toward the plane where the end face 311 is located do not overlap at least partially, thereby ensuring that there is a sufficient connection area between the second section 22 and the first tab 32, thereby ensuring the flow capacity between the second section 22 and the first tab 32 and improving the safe use performance of the battery.

[0050] In one embodiment, Figure 8 As shown, a reinforcement portion 251 is provided on the third section 25 , thereby improving the structural strength of the third section 25 and ensuring the flow capacity between the first adapter 20 and the first tab 32 .

[0051] The third section 25 is provided with a reinforcement portion 251 . The reinforcement portion 251 may be a rib, or a depression or protrusion formed by stamping.

[0052] There may be one reinforcing portion 251 , or there may be multiple reinforcing portions 251 .

[0053] In one embodiment, the thickness of at least one of the first fold 23 and the second fold 24 is smaller than the thickness of the first section 21 and the second section 22, so that the first section 21 and the third section 25 can be bent through the first fold 23, and the second section 22 and the third section 25 can be bent through the second fold 24, thereby effectively improving the installation efficiency of the battery.

[0054] The first fold 23 and the second fold 24 may have a certain width. The thickness of the first fold 23 and the second fold 24 may be measured by performing a cross-section process on them. Correspondingly, the thickness of the first section 21 and the second section 22 may be measured by performing a cross-section process on them.

[0055] The thickness of at least one of the first fold 23 and the second fold 24 is smaller than the thickness of the first section 21 and the second section 22 . Therefore, the first fold 23 and the second fold 24 are relatively easy to bend, thereby effectively improving the installation efficiency of the first adapter 20 .

[0056] In one embodiment, Figure 11 As shown, the first adapter 20 is formed with a notch 26, and the first fold 23 and the second fold 24 form a part of the wall of the notch 26, which not only improves the bending ability of the first adapter 20, but also allows the notch 26 to form an avoidance space to prevent the first adapter 20 from interfering with other structures. For example, it can prevent the first adapter 20 from interfering with the shell part 80 after bending.

[0057] Combine Figure 11 As shown, a gap 26 is formed between the first section 21 , the second section 22 and the third section 25 . The first fold 23 , the second fold 24 and the third section 25 can form the bottom wall of the gap 26 , while the first section 21 and the second section 22 form the side walls of the gap 26 .

[0058] In one embodiment, the first section 21 and the second section 22 are parallel, and the first section 21 and the second section 22 are spaced apart. Based on the reasonable layout of the first section 21 and the second section 22, the space of the battery can be effectively utilized, and the first adapter 20 can have a certain buffering capacity to avoid structural damage to the battery during use.

[0059] The first section 21 and the second section 22 are spaced apart from each other, that is, the second fold 24 may have a certain width, so that after the second section 22 and the third section 25 are bent through the second fold 24 , the first section 21 and the second section 22 are spaced apart from each other.

[0060] In one embodiment, Figure 4 As shown, the cylindrical battery cell 30 further includes a second tab 33 , and the first tab 32 and the second tab 33 extend from the same end of the battery cell body 31 , thereby effectively reducing the height space of the battery and improving the energy density of the battery.

[0061] In one embodiment, Figure 1 and Figure 2 As shown, the cover plate assembly also includes a second adapter 40 and a pole assembly 50. The pole assembly 50 is arranged on the cover plate 10, and the second adapter 40 is fixedly electrically connected to the second pole ear 33; wherein, the first adapter 20 or the second adapter 40 is electrically connected to the pole assembly 50, so that the pole assembly 50 can be used as an electrode lead-out terminal of the battery, which facilitates the subsequent grouping of batteries, improves the efficiency of battery grouping, and is beneficial to the electrical connection between adjacent batteries.

[0062] In one embodiment, Figure 1 and Figure 2 As shown, the battery further includes a housing member 80 , and the cover plate 10 is connected to the housing member 80 , so that the cover plate 10 and the housing member 80 can form a protection for the cylindrical battery cell 30 .

[0063] One of the first adapter 20 and the second adapter 40 is electrically connected to the pole assembly 50, and the other is electrically connected to at least one of the cover plate 10 and the shell member 80, that is, the cover plate 10 or the shell member 80 can be used as another electrode lead-out terminal of the battery, which not only reduces the number of battery components, but also allows for multiple connection selection positions during battery grouping, thereby improving the battery's grouping capability.

[0064] The cover plate 10 and the housing 80 can be welded and electrically connected to each other. One of the first adapter 20 and the second adapter 40 can be electrically connected to the terminal assembly 50, and the other can be electrically connected to the cover plate 10. When the batteries are grouped, the busbar can be electrically connected to the cover plate 10 or the housing 80.

[0065] In one embodiment, the sum of the areas enclosed by the circumferential outer edges of the first and second pole tabs 32, 33 connected to the end face 311 is c, the area of ​​the end face 311 is d, and (dc) / c is 0.3-5, thereby ensuring that the first and second pole tabs 32, 33 can occupy a larger area of ​​the end face 311, thereby ensuring the current flow capacity of the first and second pole tabs 32, 33 and improving the safe use performance of the battery.

[0066] One end of the battery cell body 31 where the first pole tab 32 and the second pole tab 33 are led out is represented as the end face 311. The sum of the areas enclosed by the circumferential outer edges of the first pole tab 32 and the second pole tab 33 connected to the end face 311 is c, that is, the area of ​​the pole tab region of the end face 311 is c, and the area of ​​the non-pole tab region of the end face 311 is dc. By making the ratio of the non-pole tab region area to the pole tab region area 0.3-5, on the basis of ensuring reliable insulation of the first pole tab 32 and the second pole tab 33, the overcurrent capacity of the first pole tab 32 and the second pole tab 33 can be further guaranteed, thereby improving the safe performance of the battery.

[0067] The ratio of the non-tab area to the tab area can be 0.3, 0.5, 0.8, 1, 1.2, 1.3, 1.5, 1.8, 2, 2.2, 2.3, 2.5, 2.8 or 3, etc.

[0068] In one embodiment, Figure 5 and Figure 6As shown, the battery also includes an insulating member 60, at least a portion of which is disposed between the first adapter 20 and the second adapter 40 to insulate and isolate the first adapter 20 from the second adapter 40, thereby effectively avoiding the risk of a short circuit between the first adapter 20 and the second adapter 40 and improving the safe use performance of the battery.

[0069] The first adapter 20 and the second adapter 40 are located on the same side of the battery cell body 31, and the first adapter 20 and the second adapter 40 are electrically connected to the first pole ear 32 and the second pole ear 33 respectively. By making at least a portion of the insulating member 60 be arranged between the first adapter 20 and the second adapter 40, the risk of short circuit between the first adapter 20 and the second adapter 40 can be effectively avoided.

[0070] The insulating member 60 may be a plastic member, or a rubber member, or a conductive member with an insulating coating, which is not limited here.

[0071] In one embodiment, at least a portion of one of the first adapter 20 and the second adapter 40 is located on the inner side of the insulating member 60, and at least a portion of the other is located on the outer side of the insulating member 60. On the basis of reliably insulating and isolating the first adapter 20 and the second adapter 40 through the insulating member 60, a limited fixation of the first adapter 20 or the second adapter 40 can also be formed, and the first adapter 20 or the second adapter 40 is located on the outer side of the insulating member 60, which can facilitate subsequent electrical connection with the pole assembly 50 or the cover plate 10.

[0072] For example, at least a portion of the first adapter 20 can be located on the inner side of the insulating member 60, and the insulating member 60 forms a limit fixation for the first adapter 20, while at least a portion of the second adapter 40 is located on the outer side of the insulating member 60. On the basis of insulating and isolating the first adapter 20 and the second adapter 40, the subsequent electrical connection between the second adapter 40 and the cover plate 10 can also be facilitated.

[0073] In one embodiment, Figure 6 As shown, the insulating member 60 is formed with a receiving cavity 61, and at least a portion of the first section 21 is located in the receiving cavity 61, so that the insulating member 60 can form a reliable protection for the first section 21, ensure that the first section 21 can be reliably positioned, and improve the assembly efficiency of the battery.

[0074] In one embodiment, at least one of the first adapter 20 and the second adapter 40 is covered with an insulating layer, so that insulation protection can be formed by the insulating layer to avoid the risk of short circuit connection.

[0075] For example, the first adapter 20 may be covered with an insulating layer, and the insulating layer may at least cover the third section 25 of the first adapter 20. The insulating layer may be wrapped around the third section 25, or the insulating layer may be bonded to the third section 25, which is not limited here.

[0076] In one embodiment, an insulating layer is provided between the first section 21 and the second section 22. The insulating layer is bonded and fixed to at least one of the first section 21 and the second section 22 by an adhesive layer 70, so that the insulating layer can be reliably provided between the first section 21 and the second section 22 to prevent the insulating layer from detaching, and also to provide insulation protection for the first section 21 and the second section 22.

[0077] It should be noted that the insulating layer may be an insulating film, for example, an insulating tape, or a plastic film, which may be bonded and fixed to at least one of the first section 21 and the second section 22 via the adhesive layer 70 .

[0078] In one embodiment, Figure 7 As shown, a glue layer 70 is connected between the first section 21 and the second section 22, thereby ensuring the stability between the first section 21 and the second section 22, preventing the first adapter 20 from moving, and improving the safety performance of the battery.

[0079] The adhesive layer 70 may be an adhesive in the related art, for example, the adhesive layer 70 may be a structural adhesive.

[0080] It should be noted that a battery comprises a cell and an electrolyte, the smallest unit capable of carrying out electrochemical reactions such as charge and discharge. A cell is formed by winding or laminating a stack of components, which includes a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarity of the first and second electrodes can be interchanged. The first and second electrodes are coated with an active material.

[0081] The battery may be a cylindrical battery, or a hexagonal prism battery. The battery may be a wound battery, i.e., a first electrode sheet, a second electrode sheet having electrical properties opposite to the first electrode sheet, and a separator sheet disposed between the first electrode sheet and the second electrode sheet are wound to obtain a wound battery cell.

[0082] In some embodiments, it is not excluded that the first electrode tab 32 and the second electrode tab 33 with opposite polarities may extend from opposite sides of the battery cell body 31 .

[0083] One embodiment of the present invention further provides a battery pack including the above cylindrical battery.

[0084] A battery pack according to one embodiment of the present invention includes a cover plate assembly and a cylindrical cell 30, which are electrically connected to each other. The cover plate assembly includes a cover plate 10 and a first adapter 20. The first adapter 20 is bent into a first section 21, a second section 22, and a third section 25. A first fold 23 is formed between the first section 21 and the third section 25, and a second fold 24 is formed between the second section 22 and the third section 25. The first section 21 is fixedly connected to the cover plate 10, and the second section 22 is fixedly electrically connected to the first tab 32 of the cylindrical cell 30. The first section 21 and the third section 25 are located on the side of the second section 22 facing away from the cell body 31, thereby effectively improving the space utilization of the battery. When the cover plate 10 and the first adapter 20 are bent along the first fold 23 so that the plane where the large surface of the cover plate 10 is located is perpendicular to the plane where the end face 311 of the battery cell body 31 extends from the first pole ear 32, the orthographic projection of the cover plate 10 toward the plane where the end face 311 is located does not coincide with the end face 311, that is, during the assembly process of the cover plate assembly and the cylindrical battery cell 30, interference between the cover plate 10 and the battery cell body 31 can be avoided, the internal structure of the cylindrical battery cell 30 is avoided from being deformed by force, and the risk of the first pole ear 32 being inserted upside down and causing an internal short circuit in the battery is avoided, thereby effectively improving the safe use performance of the battery pack.

[0085] In one embodiment, the battery pack is a battery module or a battery pack.

[0086] The battery module includes a plurality of cylindrical batteries. The battery module may further include a bracket on which the batteries may be fixed.

[0087] The battery pack includes multiple cylindrical batteries and a box body, which is used to fix the multiple cylindrical batteries.

[0088] It should be noted that the battery pack includes cylindrical batteries, which may be multiple, and the multiple cylindrical batteries are placed in the box. The multiple cylindrical batteries can be formed into a battery module and then installed in the box. Alternatively, the multiple cylindrical batteries can be placed directly in the box, that is, there is no need to group the multiple cylindrical batteries, and the box can be used to fix the multiple cylindrical batteries.

[0089] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the inventions disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and illustrative embodiments are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

[0090] It should be understood that the present disclosure is not limited to the precise structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A battery, characterized in that: include: A cover plate assembly, comprising a cover plate (10) and a first adapter (20), wherein the first adapter (20) is bent into a first section (21), a second section (22), and a third section (25), wherein the third section (25) is arranged between the first section (21) and the second section (22), a first fold (23) is formed between the first section (21) and the third section (25), and a second fold (24) is formed between the second section (22) and the third section (25), and the first section (21) is fixedly connected to the cover plate (10); A cylindrical battery cell (30), the cylindrical battery cell (30) comprising a battery cell body (31) and a first pole lug (32) extending from at least one end of the battery cell body (31), the first pole lug (32) being fixedly electrically connected to the second section (22), the first section (21) and the third section (25) being located on a side of the second section (22) facing away from the battery cell body (31), and the first section (21) being parallel to an end surface (311) of the battery cell body (31) extending from the first pole lug (32); Wherein, when the cover plate (10) and the first adapter (20) are bent along the first fold (23) so that the plane where the large surface of the cover plate (10) is located is perpendicular to the plane where the end surface (311) is located, the orthographic projection of the cover plate (10) toward the plane where the end surface (311) is located does not overlap with the end surface (311).

2. The battery according to claim 1, characterized in that The first section (21) and the third section (25) are located on the same plane; When the cover plate (10) and the first adapter (20) are rotated along the first fold (23) and the second fold (24) until the second section (22) and the third section (25) are located on the same plane, the plane where the large surface of the cover plate (10) is located is perpendicular to the plane where the end surface (311) of the battery cell body (31) extending from the first tab (32) is located.

3. The battery according to claim 1 or 2, characterized in that The second section (22) is welded to the first tab (32) to form a welding area (221) on the second section (22); after the first adapter (20) is straightened, the first fold (23) and the second fold (24) are parallel, and along a preset direction, a distance a between the first fold (23) and the second fold (24) is smaller than a dimension b of the welding area (221); the preset direction is perpendicular to the first fold (23).

4. The battery according to claim 3, characterized in that a / b is 0.1-0.6, and / or a is 1.5 mm-5 mm.

5. The battery according to claim 1 or 2, characterized in that The orthographic projection of the second fold (24) toward the plane where the end surface (311) is located coincides with the end surface (311).

6. The battery according to claim 5, characterized in that The orthographic projections of the second fold (24) and the first tab (32) toward the plane where the end surface (311) is located at least partially do not overlap.

7. The battery according to claim 1 or 2, characterized in that The third section (25) is provided with a reinforcement portion (251).

8. The battery according to claim 1 or 2, characterized in that The thickness of at least one of the first fold (23) and the second fold (24) is smaller than the thickness of the first section (21) and the second section (22).

9. The battery according to claim 1 or 2, characterized in that The first adapter (20) is formed with a notch (26), and the first fold (23) and the second fold (24) form a portion of the wall surface of the notch (26).

10. The battery according to claim 1 or 2, characterized in that The first section (21) and the second section (22) are parallel to each other, and the first section (21) and the second section (22) are spaced apart from each other.

11. The battery according to claim 1 or 2, characterized in that The cylindrical battery cell (30) further includes a second pole lug (33), and the first pole lug (32) and the second pole lug (33) extend from the same end of the battery cell body (31).

12. The battery according to claim 11, characterized in that The cover plate assembly further comprises a second adapter (40) and a pole assembly (50), wherein the pole assembly (50) is arranged on the cover plate (10), and the second adapter (40) is fixedly electrically connected to the second pole lug (33); Wherein, the first adapter (20) or the second adapter (40) is electrically connected to the pole assembly (50).

13. The battery according to claim 12, characterized in that The battery further comprises a housing member (80), and the cover plate (10) is connected to the housing member (80); One of the first adapter (20) and the second adapter (40) is electrically connected to the pole assembly (50), and the other is electrically connected to at least one of the cover plate (10) and the housing (80).

14. The battery according to claim 11, characterized in that The sum of the areas enclosed by the circumferential outer edges of the first pole tab (32) and the second pole tab (33) connected to the end surface (311) is c, the area of ​​the end surface (311) is d, and (dc) / c is 0.3-5.

15. The battery according to claim 12, characterized in that The battery further includes an insulating member (60), at least a portion of which is disposed between the first adapter (20) and the second adapter (40) to insulate and isolate the first adapter (20) and the second adapter (40).

16. The battery according to claim 15, characterized in that At least a portion of one of the first transition piece (20) and the second transition piece (40) is located inside the insulating piece (60), and at least a portion of the other is located outside the insulating piece (60).

17. The battery according to claim 16, characterized in that The insulating member (60) is formed with a receiving cavity (61), and at least a portion of the first section (21) is located in the receiving cavity (61).

18. The battery according to claim 12, characterized in that At least one of the first adapter (20) and the second adapter (40) is covered with an insulating layer.

19. The battery according to claim 1 or 2, characterized in that An adhesive layer (70) is connected between the first section (21) and the second section (22), and / or an insulating layer is provided between the first section (21) and the second section (22), and the insulating layer is bonded and fixed to at least one of the first section (21) and the second section (22) through the adhesive layer (70).

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