Battery cell, battery, and electronic device

Abstract

The utility model provides a kind of electric core, battery and electronic equipment, in the electric core, first insulating part covers the bottom surface of at least part electric core body, two second insulating parts cover two first side surfaces of at least part electric core body respectively, four third insulating parts cover two second side surfaces of at least part electric core body respectively;The bottom edge of two second insulating parts is connected with the opposite two edges of first insulating part respectively, and the other two edges of first insulating part do not extend outward, and the two side edges of second insulating part are connected with third insulating part respectively;There is gap between third insulating part and first insulating part, main part covers gap, one end of main part extends to one end of third insulating part close to gap, the other end of main part extends to one end of first insulating part close to gap, and the product of the length of main part, the width of main part and the thickness of main part is less than or equal to 800mm 3 , and greater than or equal to 20mm 3 . The utility model can avoid the problem that it is difficult to put the electric core into the shell and easily injure the electric core.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, and in particular to a battery cell, battery and electronic device. Background Technology

[0002] Lithium-ion batteries are rechargeable batteries that primarily function by the movement of lithium ions between the positive and negative electrodes. During charging and discharging, lithium ions repeatedly insert and extract between the two electrodes; during charging, lithium ions extract from the positive electrode, pass through the electrolyte, and insert into the negative electrode, leaving the negative electrode in a lithium-rich state; the reverse occurs during discharging. Lithium-ion batteries are widely used in the electronics, new energy, and energy storage industries due to their advantages such as high energy density, high voltage platform, small size, long lifespan, no memory effect, low self-discharge rate, and environmental friendliness.

[0003] In related technologies, lithium-ion batteries typically include a casing and a cell. The cell is located inside the casing, which is filled with electrolyte. The cell includes a positive electrode, a separator, and a negative electrode. The separator separates the positive and negative electrodes. These three components can be stacked to form a laminated cell or wound to form a wound cell. A positive electrode tab can extend from the positive electrode, and a negative electrode tab can extend from the negative electrode. In related technologies, the cell needs to be wrapped with an insulating film before being inserted into the casing to prevent the positive and negative electrodes from contacting the casing and causing a short circuit. It also prevents the cell from being scratched by protrusions, burrs, or foreign objects at the casing opening or inside during insertion, which could render the cell unusable. Typically, one end of the cell is used to lead out the electrode tab, while the other end is covered by an integral insulating film. This improves the insulation between the cell and the casing, prevents damage during insertion, and reduces the risk of the cell being crushed.

[0004] However, when wrapping the insulating film before inserting the battery cell into the casing, the insulating film can easily form multi-layered areas on the battery cell with a large thickness, making it difficult to insert the battery cell into the casing and easily damaging the battery cell. Utility Model Content

[0005] In view of the above problems, the present invention provides a battery cell, battery and electronic device that can avoid the problem of large battery cell thickness caused by the formation of multiple layers of insulating film on the battery cell, thereby avoiding the difficulty of battery cell installation and avoiding the problem of damaging the battery cell.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A first aspect of this utility model provides a battery cell, the battery cell comprising:

[0008] The battery cell body includes a bottom surface, two first side surfaces, and two second side surfaces connected together.

[0009] The insulating component includes an insulating film and at least one first adhesive member. The insulating film includes a first insulating portion, two second insulating portions, and four third insulating portions connected together. The bottom edges of the two second insulating portions are respectively connected to two opposite sides of the first insulating portion. The other two sides of the first insulating portion do not extend outward. The two side edges of the second insulating portions are respectively connected to the third insulating portions. The first insulating portion covers at least a portion of the bottom surface. The two second insulating portions respectively cover two first side surfaces. The four third insulating portions respectively cover at least a portion of two second side surfaces.

[0010] There is a gap between the third insulating portion and the first insulating portion. The first adhesive includes a main body portion that covers the gap. One end of the main body portion extends to the end of the third insulating portion near the gap, and the other end of the main body portion extends to the end of the first insulating portion near the gap.

[0011] The product of the length, width, and thickness of the main body is less than or equal to 800 mm. 3 and greater than or equal to 20mm 3 .

[0012] A second aspect of the present invention also provides a battery, which includes at least: a casing and the battery cell described in the first aspect above;

[0013] The battery cell is located inside the housing.

[0014] A third aspect of this utility model also provides an electronic device, which includes: an electronic device body and a battery as described in the second aspect above, wherein the battery provides electrical energy to the electronic device body.

[0015] The battery cell, battery, and electronic device provided in this embodiment of the invention have the following advantages:

[0016] In the battery cell provided by this utility model embodiment, the first insulating part of the insulating component covers at least a portion of the bottom surface of the battery cell body, the two second insulating parts of the insulating component cover at least a portion of the two first side surfaces of the battery cell body, and the four third insulating parts of the insulating component cover at least a portion of the two second side surfaces of the battery cell body. In this way, when the battery cell is placed into the battery casing, the insulating component can insulate the battery cell body from the casing. Since there is a gap between the third insulating part and the first insulating part, the problem of the battery cell thickness being large due to the formation of multiple layers of insulating film on the battery cell can be avoided. This avoids the difficulty of inserting the battery cell into the casing and avoids the problem of damaging the battery cell.

[0017] By covering the notch with the main body of the first adhesive component, one end of the main body extends to the end of the third insulating portion near the notch, and the other end of the main body extends to the end of the first insulating portion near the notch, this is also to better insulate the cell body from the battery casing. Furthermore, the product of the length, width, and thickness of the main body is less than or equal to 800 mm. 3 and greater than or equal to 20mm 3 This ensures good adhesion while avoiding taking up too much space, thus preventing any impact on the battery's energy density.

[0018] In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the batteries and electronic devices provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the battery cell body in the embodiment of the present utility model;

[0021] Figure 2 A schematic diagram of the structure of the insulating film in the battery cell provided in an embodiment of this utility model;

[0022] Figure 3 A schematic diagram of the structure of a battery cell provided in an embodiment of this utility model;

[0023] Figure 4 Another structural schematic diagram of the battery cell provided in this embodiment of the present utility model;

[0024] Figure 5 A schematic diagram of the structure of the first adhesive component in the battery cell provided in an embodiment of this utility model;

[0025] Figure 6 A schematic diagram of the structure of a battery provided in an embodiment of this utility model;

[0026] Figure 7 Another structural schematic diagram of the battery provided in this embodiment of the utility model;

[0027] Figure 8 A schematic diagram of a battery cell provided in an embodiment of this utility model;

[0028] Figure 9 This is a schematic diagram of the structure of the first adhesive component, the second adhesive component, and the third adhesive component in the battery cell provided in this embodiment of the utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100-cell;

[0031] 110 - Battery cell body;

[0032] 111-Bottom;

[0033] 112 - First side view;

[0034] 113 - Second side view;

[0035] 120 - Insulation components;

[0036] 121 - Insulating film;

[0037] 1211 - First Insulation Part;

[0038] 1212 - Second Insulation Part;

[0039] 1213 - Third Insulation Section;

[0040] 1214 - Gap;

[0041] 122 - First adhesive component;

[0042] 1221 - Main body;

[0043] 1221a - Part 1;

[0044] 1221b - Part Two;

[0045] 1222 - Extension;

[0046] 123 - Second adhesive component;

[0047] 124 - Third adhesive component;

[0048] 130-Pole Module;

[0049] 131 - First pole;

[0050] 132 - Second pole column;

[0051] 200-battery;

[0052] 210 - Casing;

[0053] 220 - Cover plate;

[0054] 230 - Base plate. Detailed Implementation

[0055] A rechargeable battery, also known as a rechargeable battery or accumulator, is a battery that can be recharged after being discharged, allowing the active materials to be reactivated and reused. Utilizing the reversibility of chemical reactions, a new battery can be constructed; that is, after a chemical reaction converts into electrical energy, the electrical energy can be used to repair the chemical system, and then the chemical reaction can be converted back into electrical energy. Therefore, it is called a rechargeable battery. The main types of rechargeable batteries on the market include nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead-acid) batteries, lithium-ion batteries, and polymer lithium-ion batteries.

[0056] In related technologies, lithium-ion batteries typically include a casing and a cell. The cell is located inside the casing, which is filled with electrolyte. The cell includes a positive electrode, a separator, and a negative electrode. The separator separates the positive and negative electrodes. These three components can be stacked to form a laminated cell or wound to form a wound cell. A positive electrode tab can extend from the positive electrode, and a negative electrode tab can extend from the negative electrode. In related technologies, the cell needs to be wrapped with an insulating film before being inserted into the casing to prevent the positive and negative electrodes from contacting the casing and causing a short circuit. It also prevents the cell from being scratched by protrusions, burrs, or foreign objects at the casing opening or inside during insertion, which could render the cell unusable. Typically, one end of the cell is used to lead out the electrode tab, while the other end is covered by an integral insulating film. This improves the insulation between the cell and the casing, prevents damage during insertion, and reduces the risk of the cell being crushed.

[0057] However, in the aforementioned batteries, when the insulating film is wrapped around the cell before it is installed in the casing, there are areas where the insulating film can easily form multiple layers on the cell, especially at the corners. Due to the folding method, the insulating film often results in three or more layers on the cell surface in some areas. The resulting overlapping areas are quite thick, making it difficult to install the cell in the casing and easily damaging the cell.

[0058] To address the aforementioned problems, the battery provided in this embodiment includes a cell body and an insulating assembly. A first insulating portion of the insulating assembly covers at least a portion of the bottom surface of the cell body. Two second insulating portions of the insulating assembly cover at least a portion of two first side surfaces of the cell body, and four third insulating portions of the insulating assembly cover at least a portion of two second side surfaces of the cell body. The bottom edges of the two second insulating portions are connected to the opposite two sides of the first insulating portions, while the other two sides of the first insulating portions do not extend outwards. The two side edges of the second insulating portions are connected to the third insulating portions. A gap exists between the third insulating portions and the first insulating portions. A first adhesive member of the insulating assembly includes a main body that covers the gap. One end of the main body extends to the end of the third insulating portion near the gap, and the other end extends to the end of the first insulating portion near the gap. The product of the length, width, and thickness of the main body is less than or equal to 800 mm. 3 and greater than or equal to 20mm 3 This invention avoids the problems of difficulty in inserting battery cells into the casing and the risk of damaging the battery cells.

[0059] To make the above-mentioned objectives, features, and advantages of the embodiments of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0060] See Figures 1 to 4 As shown, this utility model embodiment provides a battery cell 100, which may include a battery cell body 110 and an insulation component 120. The battery cell body 110 may include a bottom surface 111, two first side surfaces 112 and two second side surfaces 113 connected together. The insulation component 120 may include an insulating film 121 and at least one first adhesive 122.

[0061] Specifically, in the embodiments of this utility model, see Figure 2As shown, the insulating film 121 may include connected: a first insulating portion 1211, two second insulating portions 1212, and four third insulating portions 1213. The bottom edges of the two second insulating portions 1212 are respectively connected to two opposite sides of the first insulating portion 1211. The other two sides of the first insulating portion 1211 do not extend outwards. The two side edges of the second insulating portions 1212 are respectively connected to the third insulating portions 1213. The first insulating portion 1211 may cover at least a portion of the bottom surface 111. The two second insulating portions 1212 may each cover two first side surfaces 112. The four third insulating portions 1213 may each cover at least a portion of two second side surfaces 113. A gap 1214 may exist between the third insulating portions 1213 and the first insulating portion 1211.

[0062] In the battery cell 100 provided in this embodiment of the present invention, the first insulating portion 1211 of the insulating component 120 covers at least a portion of the bottom surface 111 of the battery cell body 110, the two second insulating portions 1212 of the insulating component 120 respectively cover at least a portion of the two first side surfaces 112 of the battery cell body 110, and the four third insulating portions 1213 of the insulating component 120 respectively cover at least a portion of the two second side surfaces 113 of the battery cell body 110. In this way, when the battery cell 100 is placed into the battery casing, the insulating component 120 can insulate the battery cell body 110 from the casing. Since the ear of the insulating film 121 in the original design is eliminated, the situation of forming three layers of film on the second side surface 113 of the battery cell body 110 will not occur. At this time, there is a gap 1214 between the third insulating portion 1213 and the first insulating portion 1211, which can avoid the problem of the battery cell 100 being too thick due to the formation of multiple layers of film on the battery cell 100. In this way, the difficulty of inserting the battery cell 100 into the casing can be avoided, and the problem of damaging the battery cell 100 can be avoided.

[0063] In this embodiment of the present invention, the first adhesive 122 may include a main body 1221, wherein the main body 1221 may cover the notch 1214, and one end of the main body 1221 may extend to the end of the third insulating part 1213 near the notch 1214, and the other end of the main body 1221 may extend to the end of the first insulating part 1211 near the notch 1214.

[0064] In this embodiment of the invention, the product of the length D4, the width D3, and the thickness d of the main body 1221 is D4. D3 d can be less than or equal to 800mm 3 and greater than or equal to 20mm 3 .

[0065] By covering the notch 1214 with the main body 1221 of the first adhesive member 122, one end of the main body 1221 extends to the end of the third insulating part 1213 near the notch 1214, and the other end of the main body 1221 extends to the end of the first insulating part 1211 near the notch 1214, this is also to better insulate the cell body 110 from the battery casing. Furthermore, the product of the length, width, and thickness of the main body 1221 is less than or equal to 800 mm. 3 and greater than or equal to 20mm 3 This ensures good adhesion while avoiding taking up too much space, thus preventing any impact on the battery's energy density.

[0066] For example, in this embodiment of the application, the product of the length, width, and thickness of the main body 1221 can be 20mm. 3 50mm 3 100mm 3 150mm 3 200mm 3 250mm 3 300mm 3 350mm 3 400mm 3 450mm 3 500mm 3 550mm 3 600mm 3 650mm 3 700mm 3 750mm 3 Or 800mm 3 However, the embodiments in this application are not limited to these examples, nor are they limited to the examples described above.

[0067] It should be noted that the numerical values ​​and ranges involved in the embodiments of this utility model are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0068] In this embodiment of the invention, the side of the third insulating portion 1213 closest to the first insulating portion 1211 may be beveled or arc-shaped. To cover the larger gap 1214 created by the bevel or arc shape, the product of the length, width, and thickness of the main body portion 1221 may be less than or equal to 800 mm. 3 Furthermore, the product of the length, width, and thickness of the main body 1221 can be greater than or equal to 100 mm. 3 .

[0069] It is understood that, in the embodiments of this utility model, as Figure 5 As shown, the main body 1221 may include a first part 1221a and a second part 1221b connected together, wherein the first part 1221a may cover the notch 1214 and the end of the third insulating part 1213 near the notch 1214, and the second part 1221b may cover the end of the first insulating part 1211 near the notch 1214.

[0070] In this embodiment of the application, the maximum length of the first part 1221a of the main body 1221 along the first direction S1 is D1, the maximum length of the second part 1221b of the main body 1221 along the third direction S3 is D2, and the sum of D1 and D2 is the length D4 of the main body 1221.

[0071] In this embodiment of the utility model, see Figure 3 As shown, the maximum length of the notch 1214 along the first direction S1 can be L1, the maximum length of the notch 1214 along the second direction can be L2, the maximum length of the main body 1221 along the first direction S1 can be D1, and the maximum length of the main body 1221 along the second direction can be D3. Specifically, L1, L2, D1 and D3 can satisfy the following relationship: L1 is less than D1, and L2 is less than D3. This ensures that the notch 1214 can be completely covered by the main body 1221, avoiding the problem of the battery cell body 110 being exposed.

[0072] In this embodiment of the utility model, see Figure 3 As shown, the maximum length of the main body 1221 along the third direction S3 can be D2, which can be less than or equal to 110 mm and greater than or equal to 40 mm.

[0073] For example, in the embodiments of this application, the maximum length of the main body 1221 along the third direction S3 can be 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm or 110mm, etc. The embodiments of this application do not limit this, nor are they limited to the above examples.

[0074] In this embodiment of the present invention, the first adhesive member 122 may further include at least one extension 1222, wherein one end of the extension 1222 may be connected to the main body 1221, and the other end of the extension 1222 may extend to the second insulating part 1212.

[0075] In this embodiment of the invention, the peel strength of the first adhesive 122 can be greater than or equal to 4 N / cm. This ensures the bonding strength of the first adhesive 122.

[0076] For example, in the embodiments of this application, the peel strength of the first adhesive 122 may be 4N / cm, 4.5N / cm, 5N / cm, 5.5N / cm, 6N / cm, 6.5N / cm, 7N / cm, 7.5N / cm or 8N / cm, etc. The embodiments of this application do not limit this, nor are they limited to the above examples.

[0077] In this embodiment of the invention, the tensile strength of the first adhesive component 122 can be greater than or equal to 50 N / 25 mm. This ensures the structural strength of the first adhesive component 122 and prevents scratch damage.

[0078] For example, in the embodiments of this application, the tensile strength of the first adhesive 122 can be, for example, 50N / 25mm, 55N / 25mm, 60N / 25mm, 65N / 25mm, 70N / 25mm, 75N / 25mm, 80N / 25mm, 85N / 25mm or 90N / 25mm, etc. The embodiments of this application do not limit this, nor are they limited to the above examples.

[0079] In this embodiment of the invention, the insulation resistance of the first adhesive component 122 can be greater than or equal to 1 G ohm. This ensures the insulation performance of the first adhesive component 122.

[0080] For example, in the embodiments of this application, the tensile strength of the first adhesive 122 can be, for example, 1 G ohm, 1.1 G ohm, 1.2 G ohm, 1.3 G ohm, 1.4 G ohm, 1.5 G ohm, 1.6 G ohm, 1.7 G ohm or 1.8 G ohm, etc. The embodiments of this application do not limit this, nor are they limited to the above examples.

[0081] In this embodiment of the invention, the breakdown voltage of the first adhesive 122 can be greater than or equal to 2KV. This ensures the insulation performance of the first adhesive 122.

[0082] For example, in the embodiments of this application, the breakdown voltage of the first adhesive 122 can be, for example, 2KV, 2.1KV, 2.2KV, 2.3KV, 2.4KV, 2.5KV, 2.6KV, 2.7KV or 2.8KV, etc. The embodiments of this application do not limit this, nor are they limited to the above examples.

[0083] In this embodiment of the invention, the thickness of the first adhesive 122 can be less than or equal to 0.06 mm, and the thickness of the first adhesive 122 can be greater than or equal to 0.02 mm.

[0084] If the thickness of the first adhesive component 122 is too small, the first adhesive component 122 will be too fragile and the adhesive layer will be thin, making it easy to be scratched when the battery cell 100 is installed in the casing, or to fail during subsequent use. If the thickness of the first adhesive component 122 is too large, it will easily affect the size of the battery cell 100, making it difficult to install the battery cell 100 in the casing.

[0085] For example, in the embodiments of this application, the thickness of the first adhesive 122 may be 0.02mm, 0.03mm, 0.04mm, 0.05mm or 0.06mm, etc. The embodiments of this application do not limit this, nor are they limited to the above examples.

[0086] In this embodiment of the invention, the elastic modulus of the insulating film 121 can be less than or equal to 4 GPa, and the elastic modulus of the insulating film 121 can be greater than or equal to 2 GPa. Since the battery cell 100 is prone to expansion after charging, the insulating film 121 needs to have a certain elasticity to accommodate this expansion.

[0087] For example, in the embodiments of this application, the elastic modulus of the insulating film 121 can be, for example, 2GPa, 2.5GPa, 3GPa, 3.5GPa or 4GPa, etc. The embodiments of this application do not limit this, nor are they limited to the above examples.

[0088] In this embodiment of the utility model, the battery cell 100 may further include: a first electrode, a second electrode, and a separator (not shown in the figure), wherein the first electrode and the second electrode have opposite polarities and are separated by the separator, and the length of the separator in any direction exceeds the length of the first electrode and the length of the second electrode.

[0089] In one possible implementation, the product of the length, width, and thickness of the main body 1221 can be less than or equal to 600 mm. 3 Furthermore, the product of the length, width, and thickness of the main body 1221 can be greater than or equal to 20 mm. 3 .

[0090] It should be noted that, in this embodiment of the utility model, the specific form of the battery cell 100 may include, but is not limited to, the following two possible implementations:

[0091] One possible implementation is that the first electrode, the second electrode, and the diaphragm are formed by winding (not shown in the figure). In this case, the product of the length, width, and thickness of the main body 1221 can be less than or equal to 600 mm. 3 Furthermore, the product of the length, width, and thickness of the main body 1221 can be greater than or equal to 20 mm.3 .

[0092] Another possible implementation is that the first electrode and the second electrode can be composed of sequentially stacked spacers (not shown in the figure). In this case, the product of the length, width, and thickness of the main body 1221 can be less than or equal to 500 mm. 3 Furthermore, the product of the length, width, and thickness of the main body 1221 can be greater than or equal to 20 mm. 3 .

[0093] In this embodiment of the utility model, the battery cell 100 may further include: a tab assembly (not shown in the figure), wherein the tab assembly may be disposed on one end of the battery cell body 110 away from the bottom surface 111.

[0094] It is understood that in some embodiments, the tab assembly can be soldered to the bottom of the pole assembly 130 via an adapter plate.

[0095] Additionally, in some embodiments, the cell 100 may further include: at least one second adhesive 123 (see Figure 8 and Figure 9 As shown), the second adhesive 123 can cover the end of the second side 113 near the tab assembly, and at least one end of the second adhesive 123 can extend to cover the end of the first side 112 near the tab assembly.

[0096] In this embodiment of the invention, the battery cell 100 may further include: at least one third adhesive member 124 (see...) Figure 8 and Figure 9 As shown), the third adhesive 124 can cover the central region of the second side 113, and at least one end of the third adhesive 124 can extend to cover the central region of the first side 112.

[0097] In addition, such as Figure 6 and Figure 7 As shown, this utility model embodiment also provides a battery 200, which may include at least: a housing 210 and the aforementioned battery cell 100, wherein the battery cell 100 may be located inside the housing 210.

[0098] In this embodiment of the invention, the battery 200 may further include a cover plate 220, wherein the cover plate 220 may be disposed on one end of the cell body 110 away from the bottom surface 111, and the cover plate 220 may have an opening (not shown in the figure). After the cell body 110 is covered with the insulating component 120, it is assembled in the housing 210, and the housing 210 isolates the cell 100 from the outside world through the cover plate 220.

[0099] One end of the tab assembly can be electrically connected to the battery cell 100, and the other end of the tab assembly can be electrically connected to the pole assembly 130 through an adapter piece. The adapter piece is welded to both the tab assembly and the pole assembly 130.

[0100] See Figure 7 As shown, the electrode assembly 130 can be exposed through the clearance opening. Specifically, the electrode assembly 130 may include a first electrode 131 and a second electrode 132, wherein the first electrode 131 may be a positive electrode, and the second electrode 132 may be a negative electrode.

[0101] In some embodiments, the electrode assembly may also include a first electrode and a second electrode, wherein the first electrode may be a positive electrode and the second electrode may be a negative electrode.

[0102] In this embodiment of the invention, the battery 200 may further include a bottom support plate 230, wherein the bottom support plate 230 may be located between the housing 210 and the bottom surface 111 of the cell 100. Due to the requirements of processing precision, the junction between the first side surface 112, the second side surface 113 and the bottom surface 111 is not a perfect right angle, but has a certain rounded corner. By setting the bottom support plate 230, the cell 100 can be lifted a certain distance to avoid the rounded corner, thereby preventing the rounded corner from squeezing the cell 100.

[0103] It is understood that the structure of the battery cell 100 has been described in detail in the above embodiments, and will not be repeated here.

[0104] This utility model embodiment also provides an electronic device, which may include an electronic device body and the aforementioned battery 200, wherein the battery 200 provides electrical energy to the electronic device body.

[0105] The electronic device itself can be an electric vehicle, a ship, an aircraft, an energy storage device, or other electronic products. This embodiment of the invention does not limit the scope of the invention.

[0106] The structures of the battery cell 100 and the battery 200 having the battery cell 100 have been described in detail in the above embodiments, and will not be repeated here.

[0107] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0108] In the description of this specification, references to "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery cell, characterized in that, include: The battery cell body includes a bottom surface, two first side surfaces, and two second side surfaces connected together. The insulating component includes an insulating film and at least one first adhesive member. The insulating film includes connected first insulating portions, two second insulating portions, and four third insulating portions. The bottom edges of the two second insulating portions are respectively connected to two opposite sides of the first insulating portion. The other two sides of the first insulating portion do not extend outward. The two side edges of the second insulating portions are respectively connected to the third insulating portions. The first insulating portion covers at least a portion of the bottom surface. The two second insulating portions respectively cover two first side surfaces. The four third insulating portions respectively cover at least a portion of two second side surfaces. A gap exists between the third insulating portion and the first insulating portion. The first adhesive member includes a main body portion that covers the gap. One end of the main body portion extends to the end of the third insulating portion near the gap, and the other end of the main body portion extends to the end of the first insulating portion near the gap. The product of the length, width, and thickness of the main body is less than or equal to 800 mm. 3 and greater than or equal to 20mm 3 .

2. The battery cell according to claim 1, characterized in that, The third insulating part has a sloping side on the side closest to the first insulating part; The product of the length, width, and thickness of the main body is less than or equal to 800 mm. 3 and greater than or equal to 100mm 3 .

3. The battery cell according to claim 2, characterized in that, The maximum length of the notch along the first direction is L1, the maximum length of the notch along the second direction is L2, the maximum length of the main body along the first direction is D1, and the maximum length of the main body along the second direction is D3. L1, L2, D1, and D3 satisfy the following relationship: L1 is less than D1, and L2 is less than D3.

4. The battery cell according to claim 1, characterized in that, The maximum length of the main body along the third direction is D2, which is less than or equal to 110mm and greater than or equal to 40mm.

5. The battery cell according to any one of claims 1-4, characterized in that, The first adhesive further includes: at least one extension; one end of the extension is connected to the main body, and the other end of the extension extends to the second insulating portion.

6. The battery cell according to any one of claims 1-4, characterized in that, The peel strength of the first adhesive component is greater than or equal to 4 N / cm; The tensile strength of the first adhesive component is greater than or equal to 50 N / 25 mm.

7. The battery cell according to any one of claims 1-4, characterized in that, The insulation resistance of the first adhesive component is greater than or equal to 1 G ohm; The breakdown voltage of the first adhesive component is greater than or equal to 2KV.

8. The battery cell according to any one of claims 1-4, characterized in that, The thickness of the first adhesive component is less than or equal to 0.06 mm and greater than or equal to 0.02 mm.

9. The battery cell according to any one of claims 1-4, characterized in that, The elastic modulus of the insulating film is less than or equal to 4 GPa and greater than or equal to 2 GPa.

10. The battery cell according to claim 1, characterized in that, Also includes: First electrode, second electrode, and diaphragm; The first electrode and the second electrode have opposite polarities and are separated by the diaphragm, the length of which in any direction exceeds the length of the first electrode and the length of the second electrode. The product of the length, width, and thickness of the main body is less than or equal to 600 mm. 3 and greater than or equal to 20mm 3 .

11. The battery cell according to claim 10, characterized in that, The first electrode, the second electrode, and the diaphragm are formed by winding. The product of the length, width, and thickness of the main body is less than or equal to 600 mm. 3 and greater than or equal to 20mm 3 .

12. The battery cell according to claim 10, characterized in that, The first electrode and the second electrode are sequentially stacked with a diaphragm between them; The product of the length, width, and thickness of the main body is less than or equal to 500 mm. 3 and greater than or equal to 20mm 3 .

13. The battery cell according to any one of claims 1-4, characterized in that, Also includes: A tab assembly is disposed on one end of the battery cell body that is away from the bottom surface; It also includes: at least one second adhesive member, the second adhesive member covering one end of the second side near the tab assembly, and at least one end of the second adhesive member further extending to cover one end of the first side near the tab assembly.

14. The battery cell according to any one of claims 1-4, characterized in that, Also includes: At least one third adhesive member, the third adhesive member covering the central region of the second side, and at least one end of the third adhesive member extending to cover the central region of the first side.

15. A battery, characterized in that, It includes at least: a housing and a battery cell as described in any one of claims 1-14; The battery cell is located inside the housing.

16. The battery according to claim 15, characterized in that, Also includes: Cover plate; the cover plate is disposed on one end of the battery cell body opposite to the bottom surface; The cover plate has a clearance opening, one end of the electrode assembly is electrically connected to the battery cell, and the other end of the electrode assembly is exposed through the clearance opening.

17. The battery according to claim 15, characterized in that, Also includes: Base plate; The bottom support plate is located between the housing and the bottom surface of the battery cell.

18. An electronic device, characterized in that, include: The electronic device body and the battery according to any one of claims 15-17, wherein the battery provides electrical energy to the electronic device body.

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