Battery, battery pack and electric equipment

Abstract

The utility model relates to the technical field of battery assembling and manufacturing, in particular to a battery, a battery pack and electric equipment. The battery comprises a shell with an accommodating cavity; the battery cell comprises a battery cell main body and a first tab, the battery cell main body is arranged in the accommodating cavity, and the first tab is connected to the battery cell main body; and the conductive adhesive is arranged between the first tab and the shell so as to conductively connect the first tab and the shell. By arranging the conductive adhesive between the first tab and the shell, the electric contact between the first tab and the shell can be enhanced by the conductive adhesive, the problem that the internal resistance is increased due to loose contact after the battery falls is solved, and the gap between the first tab and the shell can be reduced and the friction force can be improved by arranging the conductive adhesive between the first tab and the shell, so that the service life of the battery is prolonged. And after the battery falls off, the contact looseness between the first tab and the shell is avoided, so that the safety of the battery is improved. And the conductive adhesive is arranged, so that the cost is low, a welding processing procedure does not need to be added, and the production cost of the battery is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery assembly and manufacturing, and in particular to a battery, a battery pack and an electrical device. Background Art

[0002] At present, when large cylindrical batteries are assembled and manufactured, laser welding is mainly used to weld the shell and the current collecting plate together to prevent the battery cells from moving up and down, thereby achieving the effect of stabilizing the battery cell structure. Laser welding is a good means to improve the reliability of battery drops.

[0003] In related technologies, small cylindrical batteries such as No. 5 batteries or No. 7 batteries have a relatively simple structure and a small size. After the negative electrode tab is led out from the battery cell, it generally contacts the shell through a roller groove, thereby fixing the battery cell and making the shell charged.

[0004] However, in the above-mentioned battery, the connection stability between the tab and the shell is low, which makes the battery prone to the problem of large internal resistance. Utility Model Content

[0005] Based on this, the present application provides a battery, a battery pack and an electrical device to solve the problem of unstable connection between the battery tab and the shell, which leads to increased internal resistance of the battery.

[0006] In one aspect, the present application provides a battery, comprising:

[0007] A housing having a receiving cavity;

[0008] The battery cell comprises a battery cell body and a first tab, the battery cell body is arranged in the accommodating cavity, and the first tab is connected to the battery cell body;

[0009] The conductive adhesive is disposed between the first electrode tab and the shell to electrically connect the first electrode tab and the shell.

[0010] In a possible implementation, the shell has a side wall of the accommodating cavity, the shell is provided with a roller groove, and the conductive glue is connected to the side wall of the accommodating cavity and is located on a side of the roller groove away from the battery cell body.

[0011] In a possible implementation, the conductive adhesive is located on a side wall of the accommodating cavity close to the first electrode tab; or the conductive adhesive is disposed around the side wall of the housing.

[0012] In a possible implementation, the conductive adhesive is connected to the first electrode tab to electrically connect the first electrode tab to the housing.

[0013] In a possible implementation, the orthographic projection of the first tab on the surface where the conductive adhesive is located is located within the area covered by the conductive adhesive.

[0014] In a possible implementation, the first electrode tab extends out of the battery cell body, and along the extension direction of the first electrode tab, the end of the conductive adhesive exceeds the end of the first electrode tab.

[0015] In a possible implementation, the first tab extends out of the battery cell body, the width of the first tab is W1, the width of the conductive adhesive is W2, and W1 and W2 satisfy: W2 ≥ W1.

[0016] In a possible implementation, W1 and W2 satisfy: W2 ≥ 1.5W1.

[0017] In a possible implementation, the thickness of the conductive adhesive is h1, the distance between the battery cell body and the shell on one side is h2, and h1 and h2 satisfy: h1<1 / 2h2.

[0018] In a possible implementation, the battery further includes a swelling gel, and the swelling gel is provided between the battery cell body and the shell to fill the gap between the battery cell body and the shell.

[0019] In a possible implementation, the swelling glue is provided on the battery cell body.

[0020] In a possible implementation, the area of ​​the swelling glue is less than one-fourth of the side area of ​​the battery cell body.

[0021] In a possible implementation, the swelling adhesive includes an adhesive surface and a non-adhesive surface, which are located on opposite sides of the swelling adhesive, with the adhesive surface facing the battery cell body and the non-adhesive surface facing the shell.

[0022] In a possible implementation, the swelling glue is spaced apart on the battery cell body along the height direction of the battery cell body.

[0023] In a possible implementation, the first tab is connected to the battery cell body, and the swelling glue is symmetrically arranged with the first tab along the circumference of the battery cell body; and / or the swelling glue is symmetrically arranged on both sides of the first tab.

[0024] In one possible implementation, the first tab is connected to the outer surface of the battery cell body. Along the circumference of the battery cell body, the length of the swelling gel is L1, the outer circumference of the battery cell body is L2, and the width of the first tab is W1. L1 and L2 satisfy: L1<L2-3W1.

[0025] In a possible implementation, at least one layer of swelling glue is provided between the battery body and the shell, the sum of the thickness of the at least one layer of swelling glue is h3, the distance between the battery body and the shell is h2, and h2 and h3 satisfy: h3<h2.

[0026] On the other hand, the present application provides a battery pack comprising at least one of the above-mentioned batteries.

[0027] On the other hand, the present application provides an electrical device including the above-mentioned battery pack.

[0028] The battery, battery pack, and electrical device provided herein utilize conductive adhesive disposed between the first tab and the housing. The conductive adhesive can strengthen the electrical contact between the first tab and the housing, thereby improving the problem of increased internal resistance due to loose contact after the battery is dropped. Furthermore, disposing the conductive adhesive between the first tab and the housing can reduce the gap between the first tab and the housing, improving the adhesion at the contact point. This prevents loose contact between the first tab and the housing after the battery is dropped or shaken, thereby improving battery safety. The provision of the conductive adhesive is low-cost and eliminates the need for additional welding processes, thereby reducing battery production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 A cross-sectional view of a battery provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure of the battery cell in the battery shown;

[0032] Figure 3 for Figure 2 A top view of the battery cell shown;

[0033] Figure 4 for Figure 1 A cross-sectional view of the battery from another perspective.

[0034] Description of reference numerals:

[0035] 100 - battery; 10 - housing; 11 - receiving chamber; 12 - roller groove; 20 - battery cell; 21 - battery cell body; 22 - first tab; 23 - second tab; 30 - conductive adhesive; 40 - swelling adhesive; 50 - sealing ring; 60 - pressure relief valve. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0038] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0039] The terms "first", "second" and "third" (if any) in the description and claims of this application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0041] Currently, during the assembly and manufacturing of large cylindrical batteries, laser welding is primarily used to weld the casing and collector plate together to prevent the cell from moving up and down, thus stabilizing the cell structure. Laser welding is an effective method for improving battery drop reliability. In contrast, small cylindrical batteries, such as AA or AAA batteries, have a simpler structure and smaller size. After the negative electrode tab is extended from the cell, it is generally connected to the casing through a roller groove, thereby securing the cell and charging the casing.

[0042] However, if only roller grooving is used without the side wall welding process, the negative electrode ear and the shell may become loose after the battery falls, resulting in increased internal resistance. Adding the side wall welding process will increase the processing steps and increase the cost of the battery.

[0043] After repeated thinking and verification, the inventors found that if the negative electrode tab is electrically connected to the shell through conductive glue and the roller groove is used to fix the battery cell, the electrical contact between the negative electrode tab and the shell can be strengthened, and at the same time, a stable connection between the first tab and the shell can be achieved to ensure the safety of the battery, thereby eliminating the need for side wall welding. The cost of conductive glue is low, the gluing method is convenient, and the production cost of the battery is reduced.

[0044] In view of this, the present application provides a battery, comprising: a shell having a accommodating cavity; a battery cell, the battery cell comprising a battery cell body and a first pole tab, the battery cell body being arranged in the accommodating cavity, and the first pole tab being connected to the battery cell body; and a conductive glue, the conductive glue being arranged between the first pole tab and the shell to conductively connect the first pole tab and the shell.

[0045] By providing conductive adhesive between the first tab and the housing, the adhesive can strengthen the electrical contact between the first tab and the housing, improving the problem of increased internal resistance caused by loose contact after the battery is dropped. Furthermore, providing the conductive adhesive between the first tab and the housing can reduce the gap between the first tab and the housing, improving the adhesion at the contact point. This prevents loose contact between the first tab and the housing after the battery is dropped or shaken, thereby improving battery safety. The provision of conductive adhesive is low-cost and eliminates the need for additional welding processes, reducing battery production costs.

[0046] The contents of this application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of this application more clearly and in detail.

[0047] Figure 1 A cross-sectional view of a battery provided in an embodiment of the present application. Figure 2 for Figure 1 Schematic diagram of the structure of the battery cell in the battery shown. Figure 3 for Figure 2 Top view of the battery cell shown. Figure 4 for Figure 1A cross-sectional view of the battery from another perspective.

[0048] like Figure 1 As shown, the battery 100 provided in the embodiment of the present application includes a housing 10 and a battery cell 20. The battery cell 20 is disposed in the housing 10.

[0049] In a possible implementation, the battery 100 is a cylindrical battery, specifically a small cylindrical battery such as an AA battery or an AA battery.

[0050] In a possible implementation, the housing 10 is provided with a receiving cavity 11 , and the battery cell 20 is received in the receiving cavity 11 .

[0051] In a possible implementation, the housing 10 is an aluminum shell or a steel shell.

[0052] The battery cell 20 includes a battery cell body 21 and a first tab 22. The first tab 22 is connected to the battery cell body 21. The battery cell body 21 is accommodated in the accommodation cavity 11. The first tab 22 extends toward the opening of the accommodation cavity 11.

[0053] like Figure 2 As shown, the first tab 22 extends from one side of the battery cell body 21 .

[0054] In one possible implementation, the battery cell 20 is a wound core, which includes positive and negative electrode sheets, a separator, a finishing adhesive, positive and negative electrode tabs. The first tab 22 is the negative electrode tab, which extends from the negative electrode sheet on the positive side of the battery cell body 21 and contacts the housing 10 for electrical charging.

[0055] The battery 100 further includes a conductive adhesive 30 . The conductive adhesive 30 is disposed between the first tab 22 and the housing 10 . The conductive adhesive 30 is used to electrically connect the first tab 22 and the housing 10 and can reduce the gap between the first tab 22 and the housing 10 .

[0056] The conductive adhesive 30 can be provided by applying a conductive coating or sticking a conductive tape.

[0057] In a possible implementation, the housing 10 has a side wall of the accommodating cavity 11. The conductive adhesive 30 is connected to the inner side of the housing 10, that is, is provided on the side wall of the accommodating cavity 11.

[0058] The housing 10 is provided with a roller groove 12. The roller groove 12 is arranged around the outer circumference of the housing 10. The roller groove 12 is used to secure the battery cell body 21 in the housing 10. The conductive adhesive 30 is located on the side of the roller groove 12 away from the battery cell 20. That is, in the height direction of the battery 100, the conductive adhesive 30 is located above the roller groove 12.

[0059] In a possible implementation, the conductive adhesive 30 is located on a side wall of the accommodating cavity 11 close to the first electrode tab 22 , that is, the conductive adhesive 30 is provided on the side wall of the accommodating cavity 11 in an area opposite to the first electrode tab 22 .

[0060] In one possible implementation, the conductive adhesive 30 is disposed around the inner side of the housing 10. Specifically, the conductive adhesive 30 is disposed on the sidewalls of the accommodating cavity 11, circumferentially around the accommodating cavity 11. This arrangement allows the first tab 22 to contact the conductive adhesive 30 during assembly without adjusting the placement of the battery cell 20.

[0061] like Figure 2 and Figure 3 As shown, in a possible implementation, the conductive adhesive 30 is connected to the first tab 22 and is located on a surface of the first tab 22 close to the inner side of the housing 10. That is, the conductive adhesive 30 is provided on a surface of the first tab 22 facing the side wall of the accommodating cavity 11.

[0062] The conductive adhesive 30 is connected to the first electrode tab 22 . Similarly, during assembly, there is no need to adjust the placement of the battery cell 20 , and the conductive adhesive 30 can be in contact with the side wall of the accommodating cavity 11 .

[0063] like Figure 4 As shown, in one possible implementation, along the thickness direction of the first tab 22, the orthographic projection of the first tab 22 is located within the orthographic projection of the conductive adhesive 30, that is, the orthographic projection of the first tab 22 on the surface where the conductive adhesive 30 is located is located within the coverage area of ​​the conductive adhesive 30. In other words, the conductive adhesive 30 completely covers one side of the first tab 22, thereby ensuring more complete contact between the first tab 22 and the conductive adhesive 30, thereby improving the stability of the connection and the area of ​​the point contact.

[0064] In a possible implementation, along the extension direction of the first electrode tab 22 , the end of the conductive adhesive 30 exceeds the end of the first electrode tab 22 , that is, the length of the conductive adhesive 30 exceeds the length of the first electrode tab 22 extending from the battery cell body 21 .

[0065] In a possible implementation, along an extension direction perpendicular to the first electrode tab 22 , the width of the first electrode tab 22 is W1 , and the width of the conductive adhesive 30 is W2 .

[0066] W1 and W2 satisfy: W2 ≥ W1, that is, the width of the conductive adhesive 30 is greater than the width of the first electrode tab 22.

[0067] Optionally, W1 and W2 satisfy: W2 ≥ 1.5W1.

[0068] In one possible implementation, the thickness of the conductive adhesive 30 is h1, and the distance between the battery cell body 21 and the shell 10 on one side is h2. h1 and h2 satisfy: h1<1 / 2h2, that is, the thickness of the conductive adhesive 30 is less than half of the distance between the battery cell body 21 and the side wall of the accommodating cavity 11.

[0069] In a possible implementation, the conductive adhesive 30 may become sticky after being heated, or may have a certain stickiness on both sides, or may become more sticky after pressure is applied by the roller groove 12 .

[0070] In one possible implementation, the conductive adhesive 30 is not susceptible to corrosion by the electrolyte, is resistant to high voltage and high temperature, and its viscosity is not affected by the battery assembly process.

[0071] The battery 100 also includes a swelling gel 40 and an electrolyte. The swelling gel 40 is disposed between the battery cell 21 and the housing 10. The electrolyte is contained within the housing 10. The swelling gel 40 expands after absorbing the electrolyte, thereby filling the gap between the battery cell 21 and the housing 10. Specifically, after expansion, the swelling gel 40 abuts against the sidewalls of the cell body 21 and the accommodating cavity 11, thereby securing the cell body 21 within the accommodating cavity 11.

[0072] The swelling adhesive 40 disposed between the cell body 21 and the housing 10 expands after absorbing electrolyte, filling the gap between the cell body 21 and the housing 10, thereby securing the cell body 21 within the accommodating cavity 11. Furthermore, the conductive adhesive 30 disposed between the first tab 22 and the housing 10 maintains electrical contact between the first tab 22 and the housing 10. The cell body 21 is securely secured, and even if the battery 100 falls, the contact between the first tab 22 and the housing 10 will not loosen.

[0073] The shell 10 of the cylindrical battery is relatively strong and can adapt to the swelling glue 40 to absorb the impact of the swelling of the electrolyte.

[0074] In a possible implementation, the swelling glue 40 is configured to expand along a thickness direction of the swelling glue 40 after absorbing the electrolyte, thereby being supported between the battery cell body 21 and the side wall of the accommodating cavity 11 .

[0075] In one possible implementation, the swelling adhesive 40 is made of a material that swells only by absorbing electrolyte and is not corroded by high voltage or electrolyte. Furthermore, after the swelling adhesive 40 absorbs the electrolyte, the thickness of the tape increases while the length and width remain unchanged, and the viscosity remains unchanged. The swelling adhesive 40 does not generate bubbles when absorbing electrolyte, minimizing the risk of bulging of the battery 100 due to the absorption of electrolyte by the swelling adhesive 40.

[0076] In a possible implementation, the swelling glue 40 is disposed on the outer surface of the battery cell body 21 , that is, the swelling glue 40 is disposed on a side of the battery cell body 21 facing the side wall of the accommodating cavity 11 .

[0077] In a possible implementation, the battery cell 20 is fixed with the stopper glue and then the swelling glue 40 is adhered to prevent the swelling glue 40 from absorbing liquid and swelling, which may cause the winding core to become loose.

[0078] In a possible implementation, the swelling adhesive 40 can be applied synchronously during the winding process of the battery cell 20 without introducing an additional process.

[0079] In a possible implementation, the area of ​​the swelling glue 40 is smaller than one quarter of the side area of ​​the battery cell body 21 , that is, the swelling glue 40 does not completely cover the side of the battery cell body 21 and is smaller than one quarter of the side of the battery cell body 21 .

[0080] The setting area of ​​the swelling glue 40 needs to provide sufficient supporting force to fix the battery body 21 in the accommodating cavity 11, and it needs to be as small as possible to reduce the use of materials, reduce costs, and prevent the swelling glue 40 from absorbing too much electrolyte, causing insufficient electrolyte in the battery cell and affecting the cycle performance of the battery.

[0081] In one possible implementation, the swelling adhesive 40 includes an adhesive surface and a non-adhesive surface. The adhesive surface and the non-adhesive surface are located on opposite sides of the swelling adhesive 40. The adhesive surface faces the cell body 21 and is used to apply the swelling adhesive 40 to the cell body 21. The non-adhesive surface faces the housing 10, that is, toward the sidewalls of the accommodating cavity 11, to prevent adhesion when the cell 20 is assembled into the housing 10, thereby affecting assembly efficiency and yield.

[0082] Optionally, the swelling adhesive 40 has the following characteristics: a thickness of 10-50 μm, difficulty dissolving at high temperatures without changing viscosity, resistance to electrolyte corrosion, expansion upon absorption of electrolyte at approximately 45°C, good adhesive properties after the adhesive absorbs and expands, and resistance to high voltages greater than 3.9V. The swelling adhesive 40 comprises a substrate layer and an adhesive layer; the substrate layer and the adhesive layer have strong adhesion, the inner side of the substrate layer adheres well to the adhesive layer and is not easily delaminated from the adhesive layer, the outer side of the substrate layer is non-adhesive, and the thickness can expand by approximately 200% to 400% after absorbing electrolyte, while the length and width remain unchanged; the adhesive layer has good adhesion and can effectively adhere to the battery cell body 21, and is tightly adhered to the substrate layer before and after immersion in the electrolyte, is not easily corroded or detached, and has good adhesion after absorbing the electrolyte, while the length and width remain unchanged.

[0083] In a possible implementation, the swelling gel 40 includes a plurality of swelling gels 40 , and the plurality of swelling gels 40 are arranged at intervals.

[0084] In a possible implementation, a plurality of swelling gels 40 are arranged in parallel around the circumference of the battery cell body 21 .

[0085] like Figure 3As shown, in a possible implementation, the swelling glue 40 is symmetrically arranged on the battery cell body 21 along the height direction of the battery cell body 21, that is, when the swelling glue 40 expands to fix the battery cell body 21 in the accommodating cavity 11, it ensures that the battery cell body 21 will not tilt in the height direction.

[0086] In a possible implementation, the first electrode tab 22 is connected to the outer surface of the battery cell body 21 , and part of the swelling glue 40 is symmetrically arranged with the first electrode tab 22 along the circumference of the battery cell body 21 .

[0087] In a possible implementation, along the circumference of the battery cell body 21 , portions of the swelling adhesive 40 are symmetrically disposed on both sides of the first electrode tab 22 .

[0088] In one possible implementation, along the circumference of the cell body 21 , near the position where the first tab 22 is drawn out, the swelling glue 40 is not adhered to the cell body 21 to avoid poor contact caused by a gap between the first tab 22 and the shell 10 due to the glue.

[0089] In one possible implementation, along the circumference of the cell body 21, the total length of the swelling adhesive 40 is L1, the outer circumference of the cell body 21 is L2, and the width of the first tab 22 is W1. L1 and L2 satisfy the relationship: L1 < L2 - 3W1. That is, the swelling adhesive 40 is not applied to the circumference of the cell body 21, at least three times the width of the first tab 22. This prevents poor contact between the first tab 22 and the housing 10 after assembly due to excessive swelling adhesive 40.

[0090] In a possible implementation, the shape of the swelling gel 40 may be a parallelogram with the same length and width, or may be a circle, a square, an ellipse, a trapezoid, or the like.

[0091] In a possible implementation, the width of the swelling glue 40 ranges from 4 mm to 8 mm.

[0092] In one possible implementation, at least one layer of swelling adhesive 40 is provided between the cell body 21 and the housing 10. The total thickness of the swelling adhesive 40 is h3, and the spacing between the cell body 21 and the housing 10 is h2. These two spacings satisfy the following relationship: h3 < h2. Specifically, the provision of the swelling adhesive 40 should not hinder the assembly of the cell body 21 into the accommodating cavity 11, thereby preventing difficulty in inserting the cell body 21 into the housing. The number of adhesive layers can be determined based on the thickness of the swelling adhesive 40, the gap between the cell body 21 and the housing 10, and the expansion rate of the swelling adhesive 40.

[0093] In a possible implementation, the swelling glue 40 may also be provided on the side wall of the accommodating cavity 11 .

[0094] In a possible implementation, the adhesive surface of the swelling adhesive 40 faces the side wall of the accommodating cavity 11 for placing the swelling adhesive 40 on the housing 10 , and the non-adhesive surface faces the battery cell body 21 .

[0095] The battery 100 also includes a sealing ring 50. The sealing ring 50 is disposed on the housing 10. The sealing ring 50 is used to seal the battery cell 20 within the housing 10. The sealing ring 50 covers the accommodating cavity 11, thereby sealing the battery cell body 21 disposed within the accommodating cavity 11. The sealing ring 50 fits well with the housing 10, ensuring that the battery 100 is airtight.

[0096] The first electrode tab 22 passes through the roller groove 12 and, under the action of the sealing ring 50 and the housing 10 , is in close contact with the housing 10 , so that the housing 10 is charged.

[0097] The battery cell 20 further includes a second tab 23 . The second tab 23 is connected to the battery cell body 21 and also extends toward the opening of the accommodating cavity 11 .

[0098] Illustratively, the first electrode tab 22 may be a negative electrode tab, and the second electrode tab 23 may be a positive electrode tab.

[0099] In one possible implementation, the second tab 23 is a positive electrode guide pin, extending from the positive electrode sheet in the cell body 21. The diameter of the positive electrode guide pin is larger near the cell body 21. The wider portion of the positive electrode guide pin fits tightly against the hole in the sealing ring 50, preventing the positive electrode guide pin from sinking and causing electrolyte leakage. The positive electrode guide pin, near the outside of the sealing ring 50, is a round steel wire.

[0100] In particular, the positive electrode guide needle 1 is led out from the positive electrode sheet in the battery body 6. The positive electrode guide needle has a larger diameter near the winding core and is a round steel wire near the outside of the sealing ring. The wider position of the positive electrode guide needle should fit tightly with the hole of the sealing ring to prevent the guide needle from sinking and leaking electrolyte.

[0101] The battery 100 further includes a pressure relief valve 60. The pressure relief valve 60 is provided on the sealing ring 50. The pressure relief valve 60 is used to prevent the battery from failing due to excessive internal pressure during the combustion injection safety test.

[0102] The battery 100 provided in the embodiment of the present application includes a housing 10, a battery cell 20, and a conductive adhesive 30. The battery cell 20 includes a battery body 21 and a first tab 22. The battery body 21 is disposed in the accommodating cavity 11 of the housing 10, and the first tab 22 is connected to the battery body 21. The conductive adhesive 30 is disposed between the first tab 22 and the housing 10 to electrically connect the first tab 22 to the housing 10.

[0103] By providing conductive adhesive 30 between the first tab 22 and the housing 10, the conductive adhesive 30 can strengthen the electrical contact between the first tab 22 and the housing 10, thereby improving the problem of increased internal resistance caused by loose contact after the battery 100 is dropped. Furthermore, providing the conductive adhesive 30 between the first tab 22 and the housing 10 can reduce the gap between the first tab 22 and the housing 10, improving the adhesion at the contact point. After the battery 100 is dropped or shaken, the contact between the first tab 22 and the housing 10 will not loosen, thereby improving the safety of the battery 100. The provision of the conductive adhesive 30 is low-cost and eliminates the need for additional welding processes. It maintains the original structure of the battery cell 20 and the housing 10, thus reducing the production cost of the battery 100.

[0104] In addition, an embodiment of the present application further provides a battery pack including at least one battery 100 .

[0105] The specific structure, working principle and function of the battery 100 have been described in detail in the aforementioned embodiments and will not be repeated here.

[0106] Multiple batteries are connected in series or parallel in a battery pack.

[0107] The battery pack may be a mobile phone battery, a laptop battery, or a battery used in digital electronic products.

[0108] In addition, an embodiment of the present application further provides an electric device including the battery pack described above. The electric device also includes an electric device. The battery pack is used to provide power to the electric device.

[0109] The electrical equipment in the embodiments of the present application may be a vehicle. For example, the vehicle may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Accordingly, the electrical device may be the vehicle's drive mechanism or the vehicle's control system.

[0110] In addition, the electrical equipment may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecraft, etc., among which the spacecraft may include airplanes, rockets, space shuttles or spacecraft.

[0111] Since the electric device in this embodiment includes the battery pack described in any of the above embodiments, the electric device including the battery pack structure and beneficial effects will not be further described in this embodiment.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A housing (10) having a receiving chamber (11); A battery cell (20), the battery cell (20) comprising a battery cell body (21) and a first tab (22), the battery cell body (21) being disposed in the accommodating cavity (11), and the first tab (22) being connected to the battery cell body (21); Conductive adhesive (30), the conductive adhesive (30) is provided between the first electrode tab (22) and the shell (10) to conductively connect the first electrode tab (22) and the shell (10).

2. The battery according to claim 1, characterized in that The housing (10) has a side wall of the accommodating cavity (11), the housing (10) is provided with a roller groove (12), and the conductive glue (30) is connected to the side wall of the accommodating cavity (11) and is located on a side of the roller groove (12) away from the battery cell body (21).

3. The battery according to claim 2, characterized in that The conductive adhesive (30) is located on a side wall of the accommodating cavity (11) close to the first electrode tab (22); or the conductive adhesive (30) is arranged around the side wall of the accommodating cavity (11).

4. The battery according to claim 1, characterized in that The conductive adhesive (30) is connected to the first pole tab (22) and is used to electrically connect the first pole tab (22) to the housing (10).

5. The battery according to claim 1, characterized in that The orthographic projection of the first electrode tab (22) on the surface where the conductive adhesive (30) is located is located within the area covered by the conductive adhesive (30).

6. The battery according to claim 1, characterized in that The first pole tab (22) extends out of the battery core body (21), and along the extension direction of the first pole tab (22), the end of the conductive glue (30) exceeds the end of the first pole tab (22).

7. The battery according to claim 1, characterized in that The first pole tab (22) extends out of the battery cell body (21), the width of the first pole tab (22) is W1, the width of the conductive adhesive (30) is W2, and W1 and W2 satisfy: W2≥W1.

8. The battery according to claim 7, characterized in that W1 and W2 satisfy: W2 ≥ 1.5W1.

9. The battery according to claim 1, characterized in that The thickness of the conductive adhesive (30) is h1, and the distance between the battery cell body (21) and the shell (10) on one side is h2, and h1 and h2 satisfy: h1<1 / 2h2.

10. The battery according to claim 1, characterized in that The battery (100) further comprises a swelling glue (40), wherein the swelling glue (40) is arranged between the battery cell body (21) and the shell (10) to fill the gap between the battery cell body (21) and the shell (10).

11. The battery according to claim 10, characterized in that The swelling glue (40) is arranged on the battery core body (21).

12. The battery according to claim 11, characterized in that The area of ​​the swelling glue (40) is less than one quarter of the side area of ​​the battery cell body (21).

13. The battery according to any one of claims 11 to 12, characterized in that: The swelling adhesive (40) comprises an adhesive surface and a non-adhesive surface, the adhesive surface and the non-adhesive surface being located on opposite sides of the swelling adhesive (40), the adhesive surface facing the battery core body (21), and the non-adhesive surface facing the shell (10).

14. The battery according to any one of claims 11 to 12, characterized in that: The swelling glue (40) is arranged on the battery core body (21) at intervals along the height direction of the battery core body (21).

15. The battery according to any one of claims 11 to 12, characterized in that: The first pole tab (22) is connected to the battery cell body (21), and along the circumference of the battery cell body (21), the swelling glue (40) and the first pole tab (22) are symmetrically arranged; and / or the swelling glue (40) is symmetrically arranged on both sides of the first pole tab (22).

16. The battery according to any one of claims 11 to 12, characterized in that: The first pole lug (22) is connected to the outer surface of the battery cell body (21); along the circumference of the battery cell body (21), the length of the swelling glue (40) is L1, the outer circumference of the battery cell body (21) is L2, and the width of the first pole lug (21) is W1. L1 and L2 satisfy: L1<L2-3W1.

17. The battery according to claim 10, characterized in that At least one layer of the swelling glue (40) is provided between the battery cell body (21) and the shell (10), the sum of the thicknesses of the at least one layer of the swelling glue (40) is h3, the spacing between the battery cell body (21) and the shell (10) is h2, and h2 and h3 satisfy: h3<h2.

18. A battery pack, characterized in that: Comprising at least one battery (100) according to any one of claims 1 to 17.

19. An electrical device, characterized in that: Comprising the battery pack of claim 18.

Images