Battery cell assembly, battery and electronic equipment

Abstract

The invention provides a battery cell assembly, a battery and electronic equipment, which are used for reducing the space occupation of tab glue in the length direction of the battery after the tab glue is bent along with a tab, avoiding the space waste of the tab glue in the length direction and facilitating the improvement of the capacity of the battery. The battery cell assembly comprises a battery cell and first tab glue. The battery cell comprises a battery cell body and a tab, and the tab extends out relative to the battery cell body. The electrode lug comprises a fixed electrode lug part and a bent electrode lug part, the fixed electrode lug part is fixedly connected to the battery cell body, and the bent electrode lug part is fixedly connected to one end, far away from the battery cell body, of the fixed electrode lug part. The first tab glue is arranged on the inner side surface of the fixed tab part, and the inner side surface of the bent tab part is exposed relative to the first tab glue.

Description

Cell components, batteries and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 31, 2023, with application number 202310093647.2 and application name “Battery Cell Assemblies, Batteries and Electronic Devices”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery cell assembly, a battery, and an electronic device. Background Art

[0003] Batteries, as energy storage components that provide power to electronic devices, are one of the most important electronic components in electronic devices. In traditional soft-pack batteries, the tabs of the battery cells are often bent to facilitate electrical connection to the protective circuit board. To prevent the tabs from contacting other components and causing short circuits, the tab surfaces are often coated with tab glue. However, when the tabs are bent, the tab glue occupies a certain amount of space along the length of the battery, resulting in wasted space along the length of the battery and hindering the improvement of battery capacity.

[0004] Summary of the Invention

[0005] The present application provides a battery cell assembly, a battery and an electronic device, which are used to reduce the space occupied by the tab glue in the length direction of the battery after the tab glue bends with the tab, avoid the waste of space of the tab glue in the length direction, and help improve the battery capacity.

[0006] In a first aspect, the present application provides a battery cell assembly comprising a battery cell and a first tab glue. The battery cell comprises a battery cell body and a tab, wherein the tab extends relative to the battery cell body. The tab comprises a fixed tab portion and a bent tab portion, wherein the fixed tab portion is fixedly connected to the battery cell body, and the bent tab portion is fixedly connected to an end of the fixed tab portion away from the battery cell body. The first tab glue is disposed on the inner side surface of the fixed tab portion, and the inner side surface of the bent tab portion is exposed relative to the first tab glue. That is, the first tab glue is not disposed on the inner side surface of the bent tab portion. That is, the inner side surface of the bent tab portion is not provided with tab glue.

[0007] When the cell assembly of the present application is used in a battery, since the inner side of the bent tab portion is not provided with tab glue, the space occupied by the tab glue provided on the surface of the bent tab portion in the longitudinal direction of the battery can be reduced, thereby avoiding wasting space in the longitudinal direction of the battery and facilitating an increase in battery capacity. In addition, since the inner side of the bent tab portion is not provided with tab glue, the bent tab portion can be easily bent relative to the fixed tab glue, thereby facilitating easier assembly of the battery.

[0008] The tab has a flattened state and a bent state. When the tab is in the flattened state, the bent tab portion is flattened and relatively flat with the fixed tab portion. When the tab is in the bent state, the bent tab portion is bent and relatively bent with respect to the fixed tab portion.

[0009] In one embodiment, the tab further includes a movable tab portion, which is fixedly connected to an end of the bent tab portion distal from the fixed tab portion. Specifically, the bent tab portion is fixedly connected between the fixed tab portion and the movable tab portion. When the tab is in a flattened state, both the movable tab portion and the fixed tab portion, as well as the movable tab portion and the bent tab portion, are relatively flat. When the tab is bent, the movable tab portion and the fixed tab portion are spaced apart and disposed opposite each other, and the bent tab portion is further bent relative to the movable tab portion.

[0010] In one embodiment, the battery cell assembly further includes a second tab glue, which is disposed on the outer side of the fixed tab portion, and the outer side of the bent tab portion is exposed relative to the second tab glue. That is, the second tab glue is not disposed on the outer side of the bent tab portion. That is, the outer side of the bent tab portion is not provided with tab glue.

[0011] When the cell assembly of the present application is used in a battery, since the outer side of the bent tab portion is also not provided with tab glue, the space occupied by the tab glue provided on the surface of the bent tab portion in the longitudinal direction of the battery can be further reduced, thereby avoiding wasted space in the longitudinal direction of the battery and facilitating increased battery capacity. In addition, since the outer side of the bent tab portion is also not provided with tab glue, the bent tab portion can be further facilitated to bend relative to the fixed tab glue, thereby facilitating easier assembly of the battery.

[0012] In one embodiment, the battery cell assembly further includes a second tab adhesive, which is disposed on the outer side surfaces of the fixed tab portion and the outer side surfaces of the bent tab portion. When the battery cell assembly is used in a battery, the second tab adhesive effectively protects the exposed portion of the tab, preventing the tab from contacting other components and causing a short circuit, thereby ensuring the reliability of the battery.

[0013] In one embodiment, the second tab adhesive includes a first adhesive portion and a second adhesive portion, wherein the first adhesive portion is disposed on the outer side surface of the fixed tab portion, and the second adhesive portion is fixedly connected to the first adhesive portion and disposed on the outer side surface of the bent tab portion. The left side of the second adhesive portion is flush with the left side surface of the bent tab portion, and the right side of the second adhesive portion is flush with the right side surface of the bent tab portion. That is, the second adhesive portion does not have any portion protruding relative to the left and right sides of the bent tab portion. When the bent tab portion bends relative to the fixed tab portion, the entire second adhesive portion bends along with the bent tab portion. No excess portion of the second adhesive portion protrudes relative to the bent tab portion and occupies space in the longitudinal direction of the battery. This can also effectively avoid wasting space in the longitudinal direction of the battery, which is beneficial for increasing the battery capacity.

[0014] It should be noted that the qualifiers such as "flush" regarding relative positional relationships mentioned in the embodiments of this application are based on the current state of the art, and are not absolute, strict definitions in a mathematical sense. A small amount of deviation is permitted, and approximate flushness is also acceptable. For example, the left side of the second adhesive portion is flush with the left side of the bent pole lug portion, which means that the left side of the second adhesive portion is flush with or approximately flush with the left side of the bent pole lug portion. For example, the left side of the second adhesive portion may be slightly protruding relative to the left side of the bent pole lug portion, or the left side of the second adhesive portion may be slightly retracted relative to the left side of the bent pole lug portion.

[0015] In one embodiment, the first glue portion includes a first sub-glue portion and a second sub-glue portion, the first sub-glue portion is arranged on the outer side surface of the fixed pole ear portion, the left side surface of the first sub-glue portion protrudes relative to the left side surface of the fixed pole ear portion, and / or the right side surface of the first sub-glue portion protrudes relative to the right side surface of the fixed pole ear portion.

[0016] The second sub-adhesive portion is fixedly connected between the first sub-adhesive portion and the second sub-adhesive portion and is disposed on the outer side of the fixed pole lug. The left side of the second sub-adhesive portion is flush with the left side of the fixed pole lug, and / or the right side of the second sub-adhesive portion is flush with the right side of the fixed pole lug.

[0017] The first adhesive portion may be in an inverted "T" shape.

[0018] In one embodiment, the second pole ear glue includes a first glue portion and a second glue portion, the first glue portion is arranged on the outer side surface of the fixed pole ear portion, the second glue portion is fixedly connected to the first glue portion, and is arranged on the outer side surface of the bent pole ear portion, and the width of the second glue portion gradually increases along the direction from the second glue portion to the first glue portion.

[0019] The angle between the left side of the second adhesive portion and the left side of the bent pole lug portion is an acute angle, and the angle between the right side of the second adhesive portion and the right side of the bent pole lug portion is an acute angle, or the right side of the second adhesive portion is flush with the right side of the bent pole lug portion;

[0020] Alternatively, the right side surface of the second adhesive portion is flush with the right side surface of the bent pole lug portion, and the angle between the right side surface of the second adhesive portion and the right side surface of the bent pole lug portion is an acute angle.

[0021] When the bent pole ear portion of the pole ear is bent relative to the fixed pole ear portion, the second glue portion will bend along with the bent pole ear portion. Since the second glue portion protrudes less relative to the left and right sides of the bent pole ear portion, there will be no excess part in the second glue portion that is tilted relative to the bent pole ear portion and occupies space in the length direction of the battery, which can effectively avoid wasting space in the length direction of the battery and is conducive to improving the capacity of the battery.

[0022] In one embodiment, the width of the first adhesive portion gradually increases from the second adhesive portion toward the first adhesive portion. The left side of the first adhesive portion protrudes relative to the left side of the fixed tab portion and is flush with the left side of the second adhesive portion. The right side of the first adhesive portion protrudes relative to the right side of the fixed tab portion and is flush with the right side of the second adhesive portion. The second tab adhesive is trapezoidal in shape.

[0023] In one embodiment, the left side of the first tab adhesive is protruding relative to the left side of the fixed tab portion, and / or the right side of the first tab adhesive is protruding relative to the right side of the fixed tab portion.

[0024] In one embodiment, the first pole ear glue includes a first part and a second part, the first part is arranged on the inner side of the fixed pole ear portion, the left side of the first part protrudes relative to the left side of the fixed pole ear portion, and / or the right side of the first part protrudes relative to the right side of the fixed pole ear portion.

[0025] The second portion is fixedly connected to the top side of the fixed pole ear and is disposed on the inner side of the fixed pole ear. The left side of the second portion is flush with the left side of the fixed pole ear, and / or the right side of the second portion is flush with the right side of the fixed pole ear. The first pole ear glue is in an inverted "T" shape.

[0026] In one embodiment, there are two tabs, both of which extend relative to the battery cell body and are spaced apart from each other, one tab is a positive tab and the other tab is a negative tab;

[0027] There are two first tab adhesives, which are respectively arranged on the inner side surfaces of the two fixed tab portions. The inner side surface of each bent tab portion is exposed relative to the first tab adhesive.

[0028] In one embodiment, the battery cell includes an electrode unit and a packaging film, wherein the packaging film covers the outer surface of the electrode unit to encapsulate the electrode unit. The electrode unit includes multiple positive electrode sheets, multiple negative electrode sheets, and multiple separators. The multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked, and each separator is located between a positive electrode sheet and a negative electrode sheet. Each positive electrode sheet includes a positive electrode ear portion, and the positive electrode ears of the multiple positive electrode sheets are electrically connected to form a positive electrode ear. Each negative electrode sheet includes a negative electrode ear portion, and the negative electrode ears of the multiple negative electrode sheets are electrically connected to form a negative electrode ear.

[0029] In one embodiment, there are three tabs, all of which extend relative to the battery cell body and are spaced apart from each other, one tab being a positive tab, one tab being a negative tab, and one tab being a reference tab;

[0030] There are three first tab adhesives, which are respectively arranged on the inner side surfaces of the three fixed tab portions. The inner side surface of each bent tab portion is exposed relative to the first tab adhesive.

[0031] In one embodiment, the battery cell includes an electrode unit and a packaging film, wherein the packaging film covers the outer surface of the electrode unit to encapsulate the electrode unit. The electrode unit includes a plurality of positive electrode sheets, a plurality of negative electrode sheets, a plurality of reference electrode sheets, and a plurality of separators. The plurality of positive electrode sheets, a plurality of negative electrode sheets, and a plurality of reference electrode sheets are alternately stacked, and part of the separator is located between a positive electrode sheet and a negative electrode sheet, part of the separator is located between a positive electrode sheet and a reference electrode sheet, and part of the separator is located between a negative electrode sheet and a reference electrode sheet. Each positive electrode sheet includes a positive electrode ear, and the positive electrode ears of the plurality of positive electrode sheets are electrically connected to form a positive electrode ear. Each negative electrode sheet includes a negative electrode ear, and the negative electrode ears of the plurality of negative electrode sheets are electrically connected to form a negative electrode ear. Each reference electrode sheet includes a reference ear, and the reference ears of the plurality of reference electrode sheets are electrically connected to form a reference electrode ear.

[0032] In a second aspect, the present application provides a battery cell assembly, comprising a battery cell and a first tab adhesive. The battery cell comprises a battery cell body and a tab. The tab extends relative to the battery cell body. The tab comprises a fixed tab portion and a bent tab portion. The fixed tab portion is fixedly connected to the battery cell body, and the bent tab portion is fixedly connected to an end of the fixed tab portion away from the battery cell body. The first tab adhesive comprises a first portion and a second portion. The first portion is disposed on the inner side of the fixed tab portion. The second portion is fixedly connected to the top side of the first portion and disposed on the inner side of the bent tab portion. The left side of the second portion is flush with the left side of the bent tab portion, and the right side of the second portion is flush with the right side of the bent tab portion.

[0033] That is, there is no protruding portion in the second part relative to the left and right sides of the bent pole ear portion. When the bent pole ear portion is bent relative to the fixed pole ear portion, the entire second part will bend together with the bent pole ear portion. There will be no excess part in the second part that is raised relative to the bent pole ear portion and occupies space in the length direction of the battery. This can also effectively avoid wasting space in the length direction of the battery, which is beneficial to improving the capacity of the battery.

[0034] The tab has a flattened state and a bent state. When the tab is in the flattened state, the bent tab portion is flattened and relatively flat with the fixed tab portion. When the tab is in the bent state, the bent tab portion is bent and relatively bent with respect to the fixed tab portion.

[0035] In one embodiment, the tab further includes a movable tab portion, which is fixedly connected to an end of the bent tab portion distal from the fixed tab portion. Specifically, the bent tab portion is fixedly connected between the fixed tab portion and the movable tab portion. When the tab is in a flattened state, both the movable tab portion and the fixed tab portion, as well as the movable tab portion and the bent tab portion, are relatively flat. When the tab is bent, the movable tab portion and the fixed tab portion are spaced apart and disposed opposite each other, and the bent tab portion is further bent relative to the movable tab portion.

[0036] In one embodiment, the left side of the first portion protrudes relative to the left side of the fixed tab portion, and / or the right side of the first portion protrudes relative to the right side of the fixed tab portion.

[0037] In one embodiment, the battery cell assembly further includes a second tab glue, which is disposed on the outer side of the fixed tab portion, and the outer side of the bent tab portion is exposed relative to the second tab glue. That is, the second tab glue is not disposed on the outer side of the bent tab portion. That is, the outer side of the bent tab portion is not provided with tab glue.

[0038] When the cell assembly of the present application is used in a battery, since the outer side of the bent tab portion is also not provided with tab glue, the space occupied by the tab glue provided on the surface of the bent tab portion in the longitudinal direction of the battery can be further reduced, thereby avoiding wasted space in the longitudinal direction of the battery and facilitating increased battery capacity. In addition, since the outer side of the bent tab portion is also not provided with tab glue, the bent tab portion can be further facilitated to bend relative to the fixed tab glue, thereby facilitating easier assembly of the battery.

[0039] In one embodiment, the battery cell assembly further includes a second tab adhesive, which is disposed on the outer side surfaces of the fixed tab portion and the outer side surfaces of the bent tab portion. When the battery cell assembly is used in a battery, the second tab adhesive effectively protects the exposed portion of the tab, preventing the tab from contacting other components and causing a short circuit, thereby ensuring the reliability of the battery.

[0040] In one embodiment, the second tab adhesive includes a first adhesive portion and a second adhesive portion, wherein the first adhesive portion is disposed on the outer side surface of the fixed tab portion, and the second adhesive portion is fixedly connected to the first adhesive portion and disposed on the outer side surface of the bent tab portion. The left side of the second adhesive portion is flush with the left side surface of the bent tab portion, and the right side of the second adhesive portion is flush with the right side surface of the bent tab portion. That is, the second adhesive portion does not have any portion protruding relative to the left and right sides of the bent tab portion. When the bent tab portion bends relative to the fixed tab portion, the entire second adhesive portion bends along with the bent tab portion. No excess portion of the second adhesive portion protrudes relative to the bent tab portion and occupies space in the longitudinal direction of the battery. This can also effectively avoid wasting space in the longitudinal direction of the battery, which is beneficial for increasing the battery capacity.

[0041] In one embodiment, the first glue portion includes a first sub-glue portion and a second sub-glue portion, the first sub-glue portion is arranged on the outer side surface of the fixed pole ear portion, the left side surface of the first sub-glue portion protrudes relative to the left side surface of the fixed pole ear portion, and / or the right side surface of the first sub-glue portion protrudes relative to the right side surface of the fixed pole ear portion.

[0042] The second sub-adhesive portion is fixedly connected between the first sub-adhesive portion and the second sub-adhesive portion and is disposed on the outer side of the fixed pole lug. The left side of the second sub-adhesive portion is flush with the left side of the fixed pole lug, and / or the right side of the second sub-adhesive portion is flush with the right side of the fixed pole lug.

[0043] The first adhesive portion may be in an inverted "T" shape.

[0044] In one embodiment, the second pole ear glue includes a first glue portion and a second glue portion, the first glue portion is arranged on the outer side surface of the fixed pole ear portion, the second glue portion is fixedly connected to the first glue portion, and is arranged on the outer side surface of the bent pole ear portion, and the width of the second glue portion gradually increases along the direction from the second glue portion to the first glue portion.

[0045] The angle between the left side of the second adhesive portion and the left side of the bent pole lug portion is an acute angle, and the angle between the right side of the second adhesive portion and the right side of the bent pole lug portion is an acute angle, or the right side of the second adhesive portion is flush with the right side of the bent pole lug portion;

[0046] Alternatively, the right side surface of the second adhesive portion is flush with the right side surface of the bent pole lug portion, and the angle between the right side surface of the second adhesive portion and the right side surface of the bent pole lug portion is an acute angle.

[0047] When the bent pole ear portion of the pole ear is bent relative to the fixed pole ear portion, the second glue portion will bend along with the bent pole ear portion. Since the second glue portion protrudes less relative to the left and right sides of the bent pole ear portion, there will be no excess portion of the second glue portion that is raised relative to the bent pole ear portion and occupies space in the length direction of the battery, which can effectively avoid wasting space in the length direction of the battery and is conducive to improving the capacity of the battery.

[0048] In one embodiment, the width of the first adhesive portion gradually increases from the second adhesive portion toward the first adhesive portion. The left side of the first adhesive portion protrudes relative to the left side of the fixed tab portion and is flush with the left side of the second adhesive portion. The right side of the first adhesive portion protrudes relative to the right side of the fixed tab portion and is flush with the right side of the second adhesive portion. The second tab adhesive is trapezoidal in shape.

[0049] In one embodiment, there are two tabs, both of which extend relative to the battery cell body and are spaced apart from each other, one tab is a positive tab and the other tab is a negative tab;

[0050] There are two first tab adhesives, which are respectively arranged on the inner side surfaces of the two fixed tab portions. The inner side surface of each bent tab portion is exposed relative to the first tab adhesive.

[0051] In one embodiment, the battery cell includes an electrode unit and a packaging film, wherein the packaging film covers the outer surface of the electrode unit to encapsulate the electrode unit. The electrode unit includes multiple positive electrode sheets, multiple negative electrode sheets, and multiple separators. The multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked, and each separator is located between a positive electrode sheet and a negative electrode sheet. Each positive electrode sheet includes a positive electrode ear portion, and the positive electrode ears of the multiple positive electrode sheets are electrically connected to form a positive electrode ear. Each negative electrode sheet includes a negative electrode ear portion, and the negative electrode ears of the multiple negative electrode sheets are electrically connected to form a negative electrode ear.

[0052] In one embodiment, there are three tabs, all of which extend relative to the battery cell body and are spaced apart from each other, one tab being a positive tab, one tab being a negative tab, and one tab being a reference tab;

[0053] There are three first tab adhesives, which are respectively arranged on the inner side surfaces of the three fixed tab portions. The inner side surface of each bent tab portion is exposed relative to the first tab adhesive.

[0054] In one embodiment, the battery cell includes an electrode unit and a packaging film, wherein the packaging film covers the outer surface of the electrode unit to encapsulate the electrode unit. The electrode unit includes a plurality of positive electrode sheets, a plurality of negative electrode sheets, a plurality of reference electrode sheets, and a plurality of separators. The plurality of positive electrode sheets, a plurality of negative electrode sheets, and a plurality of reference electrode sheets are alternately stacked, and part of the separator is located between a positive electrode sheet and a negative electrode sheet, part of the separator is located between a positive electrode sheet and a reference electrode sheet, and part of the separator is located between a negative electrode sheet and a reference electrode sheet. Each positive electrode sheet includes a positive electrode ear, and the positive electrode ears of the plurality of positive electrode sheets are electrically connected to form a positive electrode ear. Each negative electrode sheet includes a negative electrode ear, and the negative electrode ears of the plurality of negative electrode sheets are electrically connected to form a negative electrode ear. Each reference electrode sheet includes a reference ear, and the reference ears of the plurality of reference electrode sheets are electrically connected to form a reference electrode ear.

[0055] In a third aspect, the present application provides a battery cell assembly, comprising a battery cell and a first tab glue, wherein the battery cell comprises a battery cell body and a tab, the tab extending relative to the battery cell body, the tab comprising a fixed tab portion and a bent tab portion, the fixed tab portion being fixedly connected to the battery cell body, the bent tab portion being fixedly connected to an end of the fixed tab portion away from the battery cell body, the first tab glue comprising a first portion and a second portion, the first portion being disposed on an inner side surface of the fixed tab portion, the second portion being fixedly connected to a top side of the first glue portion and disposed on an inner side surface of the bent tab portion, the second portion gradually increasing in width in a direction toward the first portion;

[0056] The angle between the left side of the second portion and the left side of the bent pole lug portion is an acute angle, and the angle between the right side of the second portion and the right side of the bent pole lug portion is an acute angle, or the right side of the second portion is flush with the right side of the bent pole lug portion;

[0057] Alternatively, the right side surface of the second portion is flush with the right side surface of the bent pole lug portion, and the angle between the right side surface of the second portion and the right side surface of the bent pole lug portion is an acute angle.

[0058] When the bent pole ear portion of the pole ear is bent relative to the fixed pole ear portion, the second portion will bend along with the bent pole ear portion. Since the second portion protrudes less relative to the left and right sides of the bent pole ear portion, there will be no excess part of the second portion that is raised relative to the bent pole ear portion and occupies space in the length direction of the battery, which can effectively avoid wasting space in the length direction of the battery and is conducive to improving the capacity of the battery.

[0059] In one embodiment, the width of the first portion gradually increases from the second portion toward the first portion. The left side of the first portion protrudes relative to the left side of the fixed tab portion and is flush with the left side of the second portion. The right side of the first portion protrudes relative to the right side of the fixed tab portion and is flush with the right side of the second portion. The first tab glue is trapezoidal in shape.

[0060] The tab has a flattened state and a bent state. When the tab is in the flattened state, the bent tab portion is flattened and relatively flat with the fixed tab portion. When the tab is in the bent state, the bent tab portion is bent and relatively bent with respect to the fixed tab portion.

[0061] In one embodiment, the tab further includes a movable tab portion, which is fixedly connected to an end of the bent tab portion distal from the fixed tab portion. Specifically, the bent tab portion is fixedly connected between the fixed tab portion and the movable tab portion. When the tab is in a flattened state, both the movable tab portion and the fixed tab portion, as well as the movable tab portion and the bent tab portion, are relatively flat. When the tab is bent, the movable tab portion and the fixed tab portion are spaced apart and disposed opposite each other, and the bent tab portion is further bent relative to the movable tab portion.

[0062] In one embodiment, the left side of the first portion protrudes relative to the left side of the fixed tab portion, and / or the right side of the first portion protrudes relative to the right side of the fixed tab portion.

[0063] In one embodiment, the battery cell assembly further includes a second tab glue, which is disposed on the outer side of the fixed tab portion, and the outer side of the bent tab portion is exposed relative to the second tab glue. That is, the second tab glue is not disposed on the outer side of the bent tab portion. That is, the outer side of the bent tab portion is not provided with tab glue.

[0064] When the cell assembly of the present application is used in a battery, since the outer side of the bent tab portion is also not provided with tab glue, the space occupied by the tab glue provided on the surface of the bent tab portion in the longitudinal direction of the battery can be further reduced, thereby avoiding wasted space in the longitudinal direction of the battery and facilitating increased battery capacity. In addition, since the outer side of the bent tab portion is also not provided with tab glue, the bent tab portion can be further facilitated to bend relative to the fixed tab glue, thereby facilitating easier assembly of the battery.

[0065] In one embodiment, the battery cell assembly further includes a second tab adhesive, which is disposed on the outer side surfaces of the fixed tab portion and the outer side surfaces of the bent tab portion. When the battery cell assembly is used in a battery, the second tab adhesive effectively protects the exposed portion of the tab, preventing the tab from contacting other components and causing a short circuit, thereby ensuring the reliability of the battery.

[0066] In one embodiment, the second tab adhesive includes a first adhesive portion and a second adhesive portion, wherein the first adhesive portion is disposed on the outer side surface of the fixed tab portion, and the second adhesive portion is fixedly connected to the first adhesive portion and disposed on the outer side surface of the bent tab portion. The left side of the second adhesive portion is flush with the left side surface of the bent tab portion, and the right side of the second adhesive portion is flush with the right side surface of the bent tab portion. That is, the second adhesive portion does not have any portion protruding relative to the left and right sides of the bent tab portion. When the bent tab portion bends relative to the fixed tab portion, the entire second adhesive portion bends along with the bent tab portion. No excess portion of the second adhesive portion protrudes relative to the bent tab portion and occupies space in the longitudinal direction of the battery. This can also effectively avoid wasting space in the longitudinal direction of the battery, which is beneficial for increasing the battery capacity.

[0067] In one embodiment, the first glue portion includes a first sub-glue portion and a second sub-glue portion, the first sub-glue portion is arranged on the outer side surface of the fixed pole ear portion, the left side surface of the first sub-glue portion protrudes relative to the left side surface of the fixed pole ear portion, and / or the right side surface of the first sub-glue portion protrudes relative to the right side surface of the fixed pole ear portion.

[0068] The second sub-adhesive portion is fixedly connected between the first sub-adhesive portion and the second sub-adhesive portion and is disposed on the outer side of the fixed pole lug. The left side of the second sub-adhesive portion is flush with the left side of the fixed pole lug, and / or the right side of the second sub-adhesive portion is flush with the right side of the fixed pole lug.

[0069] The first adhesive portion may be in an inverted "T" shape.

[0070] In one embodiment, the second pole ear glue includes a first glue portion and a second glue portion, the first glue portion is arranged on the outer side surface of the fixed pole ear portion, the second glue portion is fixedly connected to the first glue portion, and is arranged on the outer side surface of the bent pole ear portion, and the width of the second glue portion gradually increases along the direction from the second glue portion to the first glue portion.

[0071] The angle between the left side of the second adhesive portion and the left side of the bent pole lug portion is an acute angle, and the angle between the right side of the second adhesive portion and the right side of the bent pole lug portion is an acute angle, or the right side of the second adhesive portion is flush with the right side of the bent pole lug portion;

[0072] Alternatively, the right side surface of the second adhesive portion is flush with the right side surface of the bent pole lug portion, and the angle between the right side surface of the second adhesive portion and the right side surface of the bent pole lug portion is an acute angle.

[0073] When the bent pole ear portion of the pole ear is bent relative to the fixed pole ear portion, the second glue portion will bend along with the bent pole ear portion. Since the second glue portion protrudes less relative to the left and right sides of the bent pole ear portion, there will be no excess portion of the second glue portion that is raised relative to the bent pole ear portion and occupies space in the length direction of the battery, which can effectively avoid wasting space in the length direction of the battery and is conducive to improving the capacity of the battery.

[0074] In one embodiment, the width of the first adhesive portion gradually increases from the second adhesive portion toward the first adhesive portion. The left side of the first adhesive portion protrudes relative to the left side of the fixed tab portion and is flush with the left side of the second adhesive portion. The right side of the first adhesive portion protrudes relative to the right side of the fixed tab portion and is flush with the right side of the second adhesive portion. The second tab adhesive is trapezoidal in shape.

[0075] In one embodiment, there are two tabs, both of which extend relative to the battery cell body and are spaced apart from each other, one tab is a positive tab and the other tab is a negative tab;

[0076] There are two first tab adhesives, which are respectively arranged on the inner side surfaces of the two fixed tab portions. The inner side surface of each bent tab portion is exposed relative to the first tab adhesive.

[0077] In one embodiment, the battery cell includes an electrode unit and a packaging film, wherein the packaging film covers the outer surface of the electrode unit to encapsulate the electrode unit. The electrode unit includes multiple positive electrode sheets, multiple negative electrode sheets, and multiple separators. The multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked, and each separator is located between a positive electrode sheet and a negative electrode sheet. Each positive electrode sheet includes a positive electrode ear portion, and the positive electrode ears of the multiple positive electrode sheets are electrically connected to form a positive electrode ear. Each negative electrode sheet includes a negative electrode ear portion, and the negative electrode ears of the multiple negative electrode sheets are electrically connected to form a negative electrode ear.

[0078] In one embodiment, there are three tabs, all of which extend relative to the battery cell body and are spaced apart from each other, one tab being a positive tab, one tab being a negative tab, and one tab being a reference tab;

[0079] There are three first tab adhesives, which are respectively arranged on the inner side surfaces of the three fixed tab portions. The inner side surface of each bent tab portion is exposed relative to the first tab adhesive.

[0080] In one embodiment, the battery cell includes an electrode unit and a packaging film, wherein the packaging film covers the outer surface of the electrode unit to encapsulate the electrode unit. The electrode unit includes a plurality of positive electrode sheets, a plurality of negative electrode sheets, a plurality of reference electrode sheets, and a plurality of separators. The plurality of positive electrode sheets, a plurality of negative electrode sheets, and a plurality of reference electrode sheets are alternately stacked, and part of the separator is located between a positive electrode sheet and a negative electrode sheet, part of the separator is located between a positive electrode sheet and a reference electrode sheet, and part of the separator is located between a negative electrode sheet and a reference electrode sheet. Each positive electrode sheet includes a positive electrode ear, and the positive electrode ears of the plurality of positive electrode sheets are electrically connected to form a positive electrode ear. Each negative electrode sheet includes a negative electrode ear, and the negative electrode ears of the plurality of negative electrode sheets are electrically connected to form a negative electrode ear. Each reference electrode sheet includes a reference ear, and the reference ears of the plurality of reference electrode sheets are electrically connected to form a reference electrode ear.

[0081] In a fourth aspect, the present application provides a battery comprising any one of the above-mentioned battery cell assemblies and a protective circuit board, the pole ear further comprising a movable pole ear portion, the movable pole ear portion being fixedly connected to one end of the bent pole ear portion away from the fixed pole ear portion, the bent pole ear portion being in a bent state, the fixed pole ear portion and the movable pole ear portion being spaced apart and arranged relative to each other, the protective circuit board being located on the side of the active pole ear portion away from the fixed pole ear portion, and being electrically connected to the movable pole ear portion.

[0082] The battery shown in this application adopts the above-mentioned battery cell assembly, which can reduce the space occupied by the ear glue provided on the surface of the bent ear portion in the length direction of the battery, avoid space waste in the length direction of the battery, and is conducive to improving the capacity of the battery.

[0083] In one embodiment, the protection circuit board includes a first side surface and a second side surface, the first side surface and the second side surface being disposed opposite each other, and the second adhesive portion of the second tab adhesive is located between the first side surface and the second side surface. In other words, the second adhesive portion does not protrude relative to the side surface of the protection circuit board, ensuring that the length of the battery cell assembly meets the packaging specifications of the protection circuit board after the battery is packaged.

[0084] In one embodiment, the length of the protection plate is less than or equal to 3.5 mm.

[0085] In a fifth aspect, the present application provides an electronic device comprising a housing and any one of the above-mentioned batteries, wherein the battery is installed on the inner side of the housing.

[0086] The electronic device shown in this application uses the above-mentioned battery. The battery cell assembly in the battery can reduce the space occupied by the ear glue provided on the surface of the bent ear portion in the length direction of the battery, thereby avoiding waste of space in the length direction of the battery, which is beneficial to increasing the capacity of the battery and further helps to improve the battery life of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0088] FIG1 is a schematic structural diagram of a first electronic device provided in an embodiment of the present application;

[0089] FIG2 is a schematic diagram of the structure of a battery in the electronic device shown in FIG1 ;

[0090] FIG3 is a schematic diagram of the cross-sectional structure of the battery shown in FIG2 taken along point II;

[0091] FIG4 is a schematic diagram of the planar structure of a cell of a cell assembly in the battery shown in FIG3 ;

[0092] FIG5 is a schematic diagram of the planar structure of the battery cell shown in FIG4 at another angle;

[0093] FIG6 is a schematic planar structural diagram of a cell assembly in the battery shown in FIG3 under a first embodiment;

[0094] FIG7 is a schematic diagram of the planar structure of the battery cell assembly shown in FIG6 at another angle;

[0095] FIG8 is a schematic planar structural diagram of a cell assembly in the battery shown in FIG3 under a second embodiment;

[0096] FIG9 is a schematic diagram of the planar structure of the battery cell assembly shown in FIG8 at another angle;

[0097] FIG10 is a schematic cross-sectional view of a battery taken along line II in a second electronic device according to an embodiment of the present application;

[0098] FIG11 is a schematic planar structural diagram of a cell assembly in the battery shown in FIG10 under a first embodiment;

[0099] FIG12 is a schematic diagram of the planar structure of the cell assembly in the battery shown in FIG10 under a second embodiment. DETAILED DESCRIPTION

[0100] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0101] Please refer to FIG1 , which is a schematic structural diagram of an electronic device 1000 provided in an embodiment of the present application.

[0102] The electronic device 1000 can be an electronic product such as a mobile phone, a tablet computer, a laptop computer, a car computer, a smart watch, a smart bracelet, a POS terminal (point of sales terminal), etc. Next, the embodiment of the present application is described by taking the electronic device 1000 as an example of a mobile phone. For the convenience of description, the width direction of the electronic device 1000 is defined as the X-axis direction, the length direction of the electronic device 1000 is defined as the Y-axis direction, and the thickness direction of the electronic device 1000 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0103] The electronic device 1000 includes a housing 100, a display screen 200, a circuit board 300, a battery 400, a speaker 500 and an earpiece 600. The display screen 200 is installed on one side of the housing 100, and the circuit board 300, battery 400, speaker 500 and earpiece 600 are all installed on the inner side of the housing 100.

[0104] The shell 100 includes a middle frame 110 and a back cover 120, and the back cover 120 is installed on one side of the middle frame 110. The middle frame 110 is provided with a speaker hole 101, which connects the inner side and the outer side of the shell 100. Exemplarily, there is one speaker hole 101. In some other embodiments, there may be more than two speaker holes 101, and the present application does not specifically limit the number of speaker holes 101. Among them, the back cover 120 may be a battery cover of the electronic device 1000. Exemplarily, the back cover 120 can be installed on the middle frame 110 in a detachable manner to facilitate the maintenance and replacement of internal components or modules of the electronic device 1000.

[0105] The display screen 200 is mounted on the other side of the middle frame 110. That is, the display screen 200 is mounted on the side of the middle frame 110 away from the back cover 120. That is, the display screen 200 and the back cover 120 are respectively mounted on opposite sides of the middle frame 110. When the user uses the electronic device 1000, the display screen 200 is placed toward the user, and the back cover 120 is placed away from the user. Among them, the display screen 200 includes a cover plate and a display screen fixed to the cover plate (not shown). The cover plate can be made of transparent materials such as glass. The display screen can be a display screen such as a liquid crystal display (LCD) or an organic light-emitting diode display (OLED) for displaying information such as images or text.

[0106] In this embodiment, the display screen 200 is provided with an earpiece hole 201. The earpiece hole 201 extends through the display screen 200 along its thickness (i.e., the Z-axis direction in the figure) and connects the inner and outer sides of the housing 100. In other embodiments, the display screen 200 may not be provided with an earpiece hole 201. The display screen 200 and the housing 100 may be formed together to form the earpiece hole 201. Alternatively, the housing 100 may be provided with an earpiece hole 201. This application does not specifically limit the formation method of the earpiece hole 201.

[0107] The circuit board 300 can be the mainboard of the electronic device 1000, and the battery 400, speaker 500 and earpiece 600 are all electrically connected to the circuit board 300. Among them, the battery 400 can be the energy storage component of the electronic device 1000, and is used to provide power to components such as the display screen 200, the speaker 500 and the earpiece 600. The speaker 500 is located at the bottom of the housing 100. The speaker 500 can receive audio signals through the circuit board 300, and vibrate and sound according to the received audio signals. The sound is diffused into the external environment through the speaker hole 101, realizing the sound of the electronic device 1000. The earpiece 600 is located at the top of the housing 100. The earpiece 600 can receive audio signals through the circuit board 300, and vibrate and sound according to the received audio signals. The sound is diffused into the external environment through the earpiece hole 201, realizing the sound of the electronic device 1000.

[0108] It should be noted that the directional terms such as "top", "bottom", "left", "right", "up" and "down" used in the embodiment of the present application to describe the electronic device 1000 are mainly explained based on the display orientation of the electronic device 1000 in Figure 1, with the direction facing the positive direction of the Y axis as "top", the direction facing the negative direction of the Y axis as "bottom", the direction facing the positive direction of the X axis as "right", the direction facing the negative direction of the X axis as "left", the direction facing the positive direction of the Z axis as "up", and the direction facing the negative direction of the Z axis as "down". It does not constitute a limitation on the orientation of the electronic device 1000 in actual application scenarios.

[0109] In traditional soft-pack batteries, the tabs of the battery cells are often bent to facilitate electrical connection to the protective circuit board. To prevent the tabs from contacting other parts and causing a short circuit, the tab surfaces are often coated with tab glue. However, when the tabs are bent, the tab glue occupies a certain amount of space along the length of the battery, resulting in wasted space along the length of the battery and hindering the improvement of battery capacity.

[0110] Next, the structure of the battery 400 in the electronic device 1000 shown in the embodiment of the present application will be described in detail.

[0111] Please refer to Figures 2 and 3. Figure 2 is a schematic diagram of the structure of battery 400 in electronic device 1000 shown in Figure 1. Figure 3 is a schematic diagram of the cross-sectional structure of battery 400 shown in Figure 2 after being cut along line II. The phrase "cut along line II" refers to cutting along the plane along line II, and the relevant descriptions below shall be understood in the same manner.

[0112] It should be understood that, in the embodiment of the present application, the length direction of the battery 400 is the Y-axis direction, the width direction of the battery 400 is the X-axis direction, and the thickness direction of the battery 400 is the Z-axis direction.

[0113] The battery 400 includes a cell assembly 410 and a protection plate assembly 420. The protection plate assembly 420 is installed on the top side of the cell assembly 410 and is electrically connected to the cell assembly 410. The protection plate assembly 420 includes a protection circuit board 421, an electrical connector 422 and an external circuit board 423. The electrical connector 422 is located on the lower side of the protection circuit board 421 and is electrically connected between the protection circuit board 421 and the cell assembly 410 to achieve electrical connection between the protection plate assembly 420 and the cell assembly 410. Exemplarily, the electrical connector 422 may be in a "U" shape. The external circuit board 423 is located on the upper side of the protection circuit board 421 and is electrically connected to the protection circuit board 421 and the circuit board 300 (as shown in Figure 1) to achieve electrical connection between the protection plate assembly 420 and the circuit board 300, thereby achieving electrical connection between the battery 400 and the circuit board 300.

[0114] The protective circuit board 421 includes a first side 424 and a second side 425. The first side 424 is the surface of the protective circuit board 421 facing the positive Y-axis direction, and the second side 425 is the surface of the protective circuit board 421 facing the negative Y-axis direction. Along the Y-axis, the first side 424 and the second side 425 are arranged opposite each other. The length of the protective circuit board 421 is D. That is, along the Y-axis, the distance between the first side 424 and the second side 425 is D. Exemplarily, D is less than or equal to 3.5 mm. In other embodiments, D may also be greater than 3.5 mm.

[0115] It should be noted that the "length" mentioned in the embodiments of the present application when describing the dimensions of each component refers to the dimension of the component along the Y-axis, and the "width" mentioned refers to the dimension of the component along the X-axis. The relevant descriptions below can be understood in the same way.

[0116] The battery cell assembly 410 includes a battery cell 10, a first tab glue 20, and a second tab glue 30. The battery cell 10 includes a battery cell body 11 and a tab 12, and the tab 12 extends relative to the battery cell body 11. The battery cell body 11 has a reference surface 111, and the reference surface 111 is the surface of the battery cell body 11 facing the positive direction of the Y-axis. The tab 12 extends relative to the reference surface 111. The tab 12 includes a first surface 121 and a second surface 122. Along the thickness direction of the tab 12, the first surface 121 and the second surface 122 are arranged opposite to each other. Exemplarily, the first surface 121 is the surface of the tab 12 facing the battery cell body 11, and the second surface 122 is the surface of the tab 12 away from the battery cell body 11. The first tab glue 20 is arranged on the first surface 121, and the second tab glue 30 is arranged on the second surface 122.

[0117] Please refer to Figures 4 and 5. Figure 4 is a schematic diagram of the structure of the battery cell 10 of the battery cell assembly 410 in the battery 400 shown in Figure 3. Figure 5 is a schematic diagram of the structure of the battery cell 10 shown in Figure 4 from another angle. The battery cell 10 shown in Figures 4 and 5 has not yet been assembled with the protection plate assembly 420, and the tabs 12 of the battery cell 10 are in an unbent state. In other words, the tabs 12 of the battery cell 10 are in a flat state.

[0118] In this embodiment, there are three tabs 12. All three tabs 12 protrude relative to the reference plane 111 and are spaced apart from each other along the X-axis. One tab 12 serves as the positive tab of the battery cell 10, one tab 12 serves as the negative tab of the battery cell 10, and one tab 12 serves as the reference tab of the battery cell 10. It should be noted that the reference tab is the tab in the battery cell 10 whose potential is always 0V.

[0119] Exemplarily, the battery cell assembly 410 may include an electrode unit (not shown) and a packaging film (not shown), the packaging film covering the outer surface of the electrode unit to encapsulate the electrode unit. The electrode unit includes a plurality of positive electrode sheets, a plurality of negative electrode sheets, a plurality of reference electrode sheets and a plurality of diaphragms, wherein the plurality of positive electrode sheets, a plurality of negative electrode sheets and a plurality of reference electrode sheets are alternately stacked, a portion of the diaphragm is located between a positive electrode sheet and a negative electrode sheet, a portion of the diaphragm is located between a positive electrode sheet and a reference electrode sheet, and a portion of the diaphragm is located between a negative electrode sheet and a reference electrode sheet. Each positive electrode sheet includes a positive electrode ear, and the positive electrode ears of the plurality of positive electrode sheets are electrically connected to form a positive electrode ear. Each negative electrode sheet includes a negative electrode ear, and the negative electrode ears of the plurality of negative electrode sheets are electrically connected to form a negative electrode ear. Each reference electrode sheet includes a reference ear, and the reference ears of the plurality of reference electrode sheets are electrically connected to form a reference electrode ear.

[0120] It should be noted that in some other embodiments, there may be two tabs 12, one tab 12 serving as the positive tab of the battery cell 10, and the other tab 12 serving as the negative tab of the battery cell 10. In this case, the electrode unit includes multiple positive electrode sheets, multiple negative electrode sheets, and multiple separators, wherein the multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked, and each separator is located between a positive electrode sheet and a negative electrode sheet. The positive tabs of the multiple positive electrode sheets are electrically connected to form a positive tab, and the negative tabs of the multiple negative electrode sheets are electrically connected to form a negative tab.

[0121] Each tab 12 includes a fixed tab portion 123, a movable tab portion 124, and a bent tab portion 125. The bent tab portion 125 is fixedly connected between the fixed tab portion 123 and the movable tab portion 124. Each tab 12 has a flattened state and a bent state. When the tab 12 is in the flattened state (as shown in Figures 4 and 5), the bent tab portion 125 is in the flattened state, with the fixed tab portion 123 and the movable tab portion 124, the fixed tab portion 123 and the bent tab portion 125, and the movable tab portion 124 and the bent tab portion 125 all relatively flat. When the tab 12 is in the bent state (as shown in Figure 3), the bent tab portion 125 is in the bent state, with the fixed tab portion 123 and the movable tab portion 124 spaced apart and arranged opposite each other, and the bent tab portion 125 is bent relative to the fixed tab portion 123 and the movable tab portion 124.

[0122] The fixed pole ear portion 123 is located on the side of the pole ear 12 close to the battery cell body 11 and is fixedly connected to the battery cell body 11. The fixed pole ear portion 123 includes an inner side surface 1231 and an outer side surface 1232. Along the thickness direction of the fixed pole ear portion 123 (the Z-axis direction in the figure), the inner side surface 1231 and the outer side surface 1232 of the fixed pole ear portion 123 are arranged opposite to each other. The length of the fixed pole ear portion 123 is l1, and the width of the fixed pole ear portion 123 is w1. For example, l1 can be 1.2mm.

[0123] The active pole ear portion 124 is located on the side of the pole ear 12 facing away from the battery cell body 11. The active pole ear portion 124 includes an inner side surface 1241 and an outer side surface 1242. Along the thickness direction of the active pole ear portion 124 (Z-axis direction in the figure), the inner side surface 1241 and the outer side surface 1242 of the active pole ear portion 124 are arranged opposite to each other. The length of the active pole ear portion 124 is l2, and the width of the active pole ear portion 124 is w2. Among them, l2 is greater than l1, and w2 is equal to w1. In some other embodiments, l2 may also be less than or equal to l1, and / or, w2 may also be less than or equal to w0.

[0124] It should be understood that the "and / or" mentioned in the embodiments of the present application refers to both "and" and "or". For example, A and / or B includes the three situations of only A being present, only B being present, and both A and B being present. The following description of "and / or" should be understood in the same way.

[0125] The bent pole lug 125 is fixedly connected between the end of the fixed pole lug 123 facing away from the battery cell body 11 and the end of the movable pole lug 124 closer to the battery cell body 11. The length of the bent pole lug 125 is l3, and the width of the bent pole lug 125 is w3. Here, l3 is less than l1, and w3 is equal to w1. For example, l1 can be 0.6 mm. In other embodiments, l3 can also be greater than or equal to l1, and / or w3 can also be less than or equal to w0.

[0126] The bent pole lug portion 125 includes an inner side surface 1251 and an outer side surface 1252. Along the thickness direction of the bent pole lug portion 125 (the Z-axis direction shown in the figure), the inner side surface 1251 and the outer side surface 1252 of the bent pole lug portion 125 are arranged opposite to each other. Specifically, the inner side surface 1251 of the bent pole lug portion 125 is fixedly connected between the inner side surface 1231 of the fixed pole lug portion 123 and the inner side surface 1241 of the movable pole lug portion 124, and the outer side surface 1252 of the bent pole lug portion 125 is fixedly connected between the outer side surface 1232 of the fixed pole lug portion 123 and the outer side surface 1242 of the movable pole lug portion 124. At this time, the first surface 121 includes the inner side surface 1231 of the fixed pole ear portion 123, the inner side surface 1241 of the movable pole ear portion 124 and the inner side surface 1251 of the bent pole ear portion 125, and the second surface 122 includes the outer side surface 1232 of the fixed pole ear portion 123, the outer side surface 1242 of the movable pole ear portion 124 and the outer side surface 1252 of the bent pole ear portion 125.

[0127] Please also refer to FIG3 . When the tab 12 is in a bent state, the tab 12 bends from the second surface 122 toward the first surface 121. The bent tab portion 125 bends relative to the fixed tab portion 123 and the movable tab portion 124. The movable tab portion 124 is located above the fixed tab portion 123 and is disposed opposite the fixed tab portion 123. The movable tab portion 124 can extend into the opening of the electrical connector 422 and electrically connect to the electrical connector 422, thereby achieving electrical connection between the tab 12 and the electrical connector 422, thereby achieving electrical connection between the battery cell 10 and the electrical connector 422, and further achieving electrical connection between the battery cell assembly 410 and the electrical connector 422.

[0128] Please refer to Figures 6 and 7. Figure 6 is a schematic diagram of the structure of the battery cell assembly 410 in the battery 400 shown in Figure 3 under the first embodiment, and Figure 7 is a schematic diagram of the structure of the battery cell assembly 410 shown in Figure 6 from another angle. The battery cell assembly 410 shown in Figures 6 and 7 has not yet been assembled with the protective plate assembly 420. At this point, in the battery cell assembly 410, the tabs 12, the first tab glue 20, and the second tab glue 30 of the battery cell 10 are all in an unbent state.

[0129] In this embodiment, there are three first tab glues 20 and three second tab glues 30, and the three first tab glues 20 are respectively disposed on the first surfaces 121 of the three tabs 12. The three second tab glues 30 are respectively disposed on the second surfaces 122 of the three tabs 12. It is understood that the number of first tab glues 20 and second tab glues 30 should be adapted to the number of tabs 12. When there are two tabs 12, there are two first tab glues 20 and two second tab glues 30, and the two first tab glues 20 are respectively disposed on the first surfaces 121 of the two tabs 12, and the two second tab glues 30 are respectively disposed on the second surfaces 122 of the two tabs 12.

[0130] It should be noted that, in this embodiment, each first tab glue 20 has the same structure, and the matching relationship between each first tab glue 20 and a tab 12 is the same. Each second tab glue 30 has the same structure, and the matching relationship between each second tab glue 30 and a tab 12 is the same. The matching relationship between each second tab glue 30 and a first tab glue 20 is the same. Next, taking a tab 12, a first tab glue 20, and a second tab glue 30 as an example, the structure of the battery cell assembly 410 is described in detail.

[0131] Referring also to FIG4 , the first tab adhesive 20 is disposed on and covers the inner side surface 1231 of the fixed tab portion 123 . At this point, the inner side surface 1251 of the bent tab portion 125 is exposed relative to the first tab adhesive 20 . In other words, the first tab adhesive 20 is not disposed on the inner side surface 1251 of the bent tab portion 125 . In other words, no tab adhesive is applied to the inner side surface 1251 of the bent tab portion 125 .

[0132] In this embodiment, the first tab adhesive 20 is in the shape of a straight line. The length of the first tab adhesive 20 is L1, which is equal to l1. For example, L1 can be 1.2 mm. In other embodiments, L1 can also be less than l1. In other words, the length L1 of the first tab adhesive 20 can be less than or equal to the length l1 of the fixed tab portion 123.

[0133] Furthermore, the first tab adhesive 20 has a width W1, which is greater than w1. The left side (not labeled) of the first tab adhesive 20 protrudes relative to the left side (not labeled) of the fixed tab portion 123, and the right side (not labeled) of the first tab adhesive 20 protrudes relative to the right side (not labeled) of the fixed tab portion 123. In other embodiments, the left side of the first tab adhesive 20 may not protrude relative to the left side of the fixed tab portion 123, or the right side of the first tab adhesive 20 may not protrude relative to the right side of the fixed tab portion 123, or W1 may be less than or equal to w1.

[0134] Referring to Figures 5 and 7 , the second tab adhesive 30 is disposed on the outer side surface 1232 of the fixed tab portion 123 and the outer side surface 1242 of the bent tab portion 125 , and covers the outer side surface 1232 of the fixed tab portion 123 and the outer side surface 1242 of the bent tab portion 125 . In this embodiment, the second tab adhesive 30 is in an inverted "T" shape. The second tab adhesive 30 includes a first adhesive portion 31 and a second adhesive portion 32 . The second adhesive portion 32 is located on top of the first adhesive portion 31 and is fixedly connected to the first adhesive portion 31 .

[0135] The first adhesive portion 31 is disposed on the outer side surface 1232 of the fixed pole lug 123 and covers the outer side surface 1232 of the fixed pole lug 123. In this embodiment, the first adhesive portion 31 is in the shape of a straight line. The length of the first adhesive portion 31 is L2, where L2 is equal to l1, i.e., L2 is equal to L1. For example, L2 can be 1.2 mm. In other embodiments, L2 can also be less than l1. In other words, any length L2 of the first adhesive portion 31 can be less than or equal to the length l1 of the fixed pole lug 123.

[0136] In addition, the width of the first adhesive portion 31 is W2, which is greater than w1 and equal to W1. The left side (not marked in the figure) of the first adhesive portion 31 protrudes relative to the left side (not marked in the figure) of the fixed pole ear portion 123, and the right side (not marked in the figure) of the first adhesive portion 31 protrudes relative to the right side (not marked in the figure) of the fixed pole ear portion 123. At this time, the left side of the first adhesive portion 31 can be flush with the left side of the first pole ear adhesive 20, and the right side of the first adhesive portion 31 can be flush with the right side of the first pole ear adhesive 20. In some other embodiments, the left side of the first adhesive portion 31 may not protrude relative to the left side of the fixed pole ear portion 123, or the right side of the first adhesive portion 31 may not protrude relative to the right side of the fixed pole ear portion 123, or W2 may be less than or equal to w1.

[0137] The second adhesive portion 32 is disposed on and covers the outer side surface 1252 of the bent tab portion 125 . The second adhesive portion 32 has a length L3, which is equal to l3. For example, L3 can be 0.6 mm. In other embodiments, L3 can also be less than l1. In other words, the length L3 of the second adhesive portion 32 can be less than or equal to the length l3 of the bent tab portion 125.

[0138] Furthermore, the width of the second adhesive portion 32 is W3, which is less than W2 and equal to W3. The left side (not labeled) of the second adhesive portion 32 is recessed relative to the left side of the first adhesive portion 31 and is flush with the left side (not labeled) of the bent tab portion 125. The right side (not labeled) of the second adhesive portion 32 is recessed relative to the right side of the first adhesive portion 31 and is flush with the right side (not labeled) of the bent tab portion 125.

[0139] In some other embodiments, the left side of the second glue portion 32 may also protrude relative to the left side of the bent pole ear portion 125, and the right side of the second glue portion 32 may be retracted relative to the right side of the bent pole ear portion 125, or the left side of the second glue portion 32 may also be retracted relative to the left side of the bent pole ear portion 125, and the right side of the second glue portion 32 may protrude relative to the right side of the bent pole ear portion 125, or W3 may also be greater than or equal to w3.

[0140] It should be noted that the qualifiers such as "flush" regarding relative positional relationships mentioned in the embodiments of the present application are based on the current state of the art, rather than being strictly defined in a mathematical sense. A small amount of deviation is permitted, and being approximately flush is also acceptable. For example, the left side of the second adhesive portion 32 is flush with the left side of the bent pole lug portion 125, which means that the left side of the second adhesive portion 32 is flush with or approximately flush with the left side of the bent pole lug portion 125. For example, the left side of the second adhesive portion 32 may be slightly protruding relative to the left side of the bent pole lug portion 125, or the left side of the second adhesive portion 32 may be slightly retracted relative to the left side of the bent pole lug portion 125.

[0141] Please refer to Figures 8 and 9. Figure 8 is a schematic diagram of the structure of the battery cell assembly 410 in the battery 400 shown in Figure 3 under the second embodiment, and Figure 9 is a schematic diagram of the structure of the battery cell assembly 410 shown in Figure 8 from another angle. The battery cell assembly 410 shown in Figures 8 and 9 has not yet been assembled with the protective plate assembly 420. At this point, in the battery cell assembly 410, the tabs 12, the first tab glue 20, and the second tab glue 30 of the battery cell 10 are all in an unbent state.

[0142] The battery cell assembly 410 shown in this embodiment differs from the battery cell assembly 410 shown in the previous embodiment in that the first tab glue 20 is in an inverted "T" shape. In this embodiment, the first tab glue 20 includes a first portion 21 and a second portion 22. The second portion 22 is located on top of the first portion 21 and is fixedly connected to the first portion 21.

[0143] Please refer to Figure 4 as well. The length of the first part 21 is L4, and L4 is less than l1. Exemplarily, L4 can be 0.6 mm. In addition, the width of the first part 21 is W4, and W4 is greater than w1. Among them, the left side (not marked in the figure) of the first part 21 protrudes relative to the left side (not marked in the figure) of the fixed pole ear part 123, and the right side (not marked in the figure) of the first part 21 protrudes relative to the right side (not marked in the figure) of the fixed pole ear part 123. In some other embodiments, the left side of the first part 21 may not protrude relative to the left side of the fixed pole ear part 123, or the right side of the first part 21 may not protrude relative to the right side of the fixed pole ear part 123, or W4 may be less than or equal to w1.

[0144] The length of the second portion 22 is L5, L5 is less than l1, and the sum of L5 and L4 is equal to l1. For example, L5 may be 0.4 mm, or L5 may be 0.6 mm. In some other embodiments, the sum of L5 and L4 may be less than l1. In addition, the width of the second portion 22 is W5, W5 is less than W4, and equal to w1. The left side of the second portion 22 (not marked in the figure) is retracted relative to the left side of the first portion 21 and is flush with the left side of the fixed pole ear portion 123, and the right side of the second portion 22 (not marked in the figure) is retracted relative to the right side of the first portion 21 and is flush with the right side of the fixed pole ear portion 123.

[0145] In some other embodiments, the left side of the second part 22 may also protrude relative to the left side of the fixed pole ear portion 123, and the right side of the second part 22 may be retracted relative to the right side of the fixed pole ear portion 123, or the left side of the second part 22 may also be retracted relative to the left side of the fixed pole ear portion 123, and the right side of the second part 22 may protrude relative to the right side of the fixed pole ear portion 123, or W5 may also be smaller than or greater than w1.

[0146] 5 and 8 , in this embodiment, the first adhesive portion 31 of the second tab adhesive 30 is in an inverted T-shape. The first adhesive portion 31 includes a first sub-adhesive portion 311 and a second sub-adhesive portion 312 . The second sub-adhesive portion 312 is located on top of the first sub-adhesive portion 311 and is fixedly connected to the first sub-adhesive portion 311 .

[0147] Among them, the length of the first sub-glue portion 311 is L6, and L6 is less than l1. Exemplarily, L6 can be 0.6 mm. In addition, the width of the first sub-glue portion 311 is W6, and W6 is greater than w1. Among them, the left side (not marked in the figure) of the first sub-glue portion 311 protrudes relative to the left side (not marked in the figure) of the fixed pole ear portion 123, and the right side (not marked in the figure) of the first sub-glue portion 311 protrudes relative to the right side (not marked in the figure) of the fixed pole ear portion 123. In some other embodiments, the left side of the first sub-glue portion 311 may not protrude relative to the left side of the fixed pole ear portion 123, or the right side of the first sub-glue portion 311 may not protrude relative to the right side of the fixed pole ear portion 123, or W6 may be less than or equal to w1.

[0148] Wherein, the length of the second sub-glue portion 312 is L7, L7 is less than l1, and the sum of L7 and L6 is equal to l1. Exemplarily, L7 may be 0.6 mm. In some other embodiments, the sum of L7 and L6 may be less than l1. In addition, the width of the second sub-glue portion 312 is W7, W7 is less than W6, and equal to w1. Wherein, the left side of the second sub-glue portion 312 (not marked in the figure) is retracted relative to the left side of the first sub-glue portion 311, and is flush with the left side of the fixed pole ear portion 123, and the right side of the second sub-glue portion 312 (not marked in the figure) is retracted relative to the right side of the first sub-glue portion 311, and is flush with the right side of the fixed pole ear portion 123.

[0149] In some other embodiments, the left side of the second sub-glue portion 312 may also protrude relative to the left side of the fixed pole ear portion 123, and the right side of the second sub-glue portion 312 may be retracted relative to the right side of the fixed pole ear portion 123, or the left side of the second sub-glue portion 312 may also be retracted relative to the left side of the fixed pole ear portion 123, and the right side of the second sub-glue portion 312 may protrude relative to the right side of the fixed pole ear portion 123, or W7 may also be smaller than or greater than w1.

[0150] Referring also to FIG3 , during assembly of the cell assembly 410 and the protective plate assembly 420, the bent tab portion 125 of the tab 12 must be bent relative to the fixed tab portion 123 and the movable tab portion 124 to achieve electrical connection with the protective plate assembly 420. Since the inner side surface 1251 of the bent tab portion 125 of the tab 12 is free of tab glue, bending the bent tab portion 125 of the tab 12 is facilitated, thereby facilitating assembly of the battery 400. Furthermore, the tab glue disposed on the surface of the bent tab portion 125 can be reduced in the longitudinal direction of the battery 400, thereby avoiding wasted space in the longitudinal direction of the battery 400 and facilitating increased capacity of the battery 400. At this point, the second adhesive portion 32 is located between the first side surface 424 and the second side surface 425 of the protective circuit board 421. That is, the second adhesive portion 32 does not protrude relative to the first side surface 424 of the protection circuit board 421 , so as to ensure that the length of the cell assembly 410 meets the packaging specification of the protection circuit board 421 after the battery 400 is packaged.

[0151] Furthermore, because the left side of the second adhesive portion 32 of the second tab adhesive 30 is flush with the left side of the bent tab portion 125, and the right side of the second adhesive portion 32 is flush with the right side of the bent tab portion 125, the second adhesive portion 32 has no portion protruding relative to the left and right sides of the bent tab portion 125. Therefore, when the bent tab portion 125 bends relative to the fixed tab portion 123 and the movable tab portion 124, the entire second adhesive portion 32 bends along with the bent tab portion 125. No excess portion of the second adhesive portion 32 will tilt relative to the bent tab portion 125 and occupy space in the lengthwise direction of the battery 400. This effectively avoids wasted space in the lengthwise direction of the battery 400, thereby facilitating increased capacity of the battery 400.

[0152] It should be noted that in this embodiment, the second tab glue 30 completely covers the outer side surface 1232 of the fixed tab portion 123 and the outer side surface 1252 of the bent tab portion 125, effectively protecting the exposed portion of the tab 12, preventing the tab 12 from contacting other components and causing a short circuit, and ensuring the reliability of the battery 400. In other embodiments, the second tab glue 30 can also be provided only on the outer side surface 1232 of the fixed tab portion 123 and covering the outer side surface 1232 of the fixed tab portion 123. In this case, the outer side surface 1252 of the bent tab portion 125 is exposed relative to the second tab glue 30. In other words, the second tab glue 30 is not provided on the outer side surface 1252 of the bent tab portion 125. In other words, the outer side surface 1252 of the bent tab portion 125 is not provided with tab glue. In other words, the second tab glue 30 may also only include the first glue portion 31 in the above embodiment, which can not only further facilitate the bending of the bent tab portion 125 of the tab 12, but also further reduce the space occupied by the second tab glue 30 in the length direction of the battery 400, thereby further improving the capacity of the battery 400.

[0153] Please refer to Figures 10 and 11. Figure 10 is a schematic diagram of the cross-sectional structure of the battery 400 in the second electronic device provided in an embodiment of the present application after being cut along II. Figure 11 is a schematic diagram of the structure of the battery cell assembly 410 in the battery 400 shown in Figure 10 under the first embodiment. Among them, the battery cell assembly 410 shown in Figure 11 has not yet been assembled with the protection plate assembly 420. At this time, in the battery cell assembly 410, the tabs 12, the first tab glue 20, and the second tab glue 30 of the battery cell 10 are all in an unbent state.

[0154] The battery 400 shown in this embodiment differs from the battery 400 shown in the above embodiment in that the first tab glue 20 covers the inner side surface 1231 of the fixed tab portion 123 and the inner side surface 1251 of the bent tab portion 125, and also covers the inner side surface 1231 of the fixed tab portion 123 and the inner side surface 1251 of the bent tab portion 125. The structure of the second tab glue 30 and the mating relationship between the second tab glue 30 and the tab 12 can refer to the relevant description of the second tab glue 30 shown in the second embodiment of the above first embodiment, and will not be repeated here.

[0155] In this embodiment, the first tab adhesive 20 is in an inverted T-shape and includes a first portion 21 and a second portion 22 . The second portion 22 is located on the top side of the first portion 21 and is fixedly connected to the first portion 21 .

[0156] The first portion 21 is disposed on and covers the inner side surface 1231 of the fixed pole lug 123. In this embodiment, the first portion 21 is in an inverted T-shape. The first portion 21 includes a first sub-portion 211 and a second sub-portion 212. The second sub-portion 212 is located on top of the first sub-portion 211 and is fixedly connected between the first sub-portion 211 and the second portion 22.

[0157] The length of the first sub-portion 211 is L8, and L8 is less than l1. For example, L8 may be 0.6 mm. In addition, the width of the first sub-portion 211 is W8, and W8 is greater than w1. The left side surface (not marked in the figure) of the first sub-portion 211 protrudes relative to the left side surface (not marked in the figure) of the fixed pole ear portion 123, and the right side surface (not marked in the figure) of the first sub-portion 211 protrudes relative to the right side surface (not marked in the figure) of the fixed pole ear portion 123. In some other embodiments, the left side surface of the first sub-portion 211 may not protrude relative to the left side surface of the fixed pole ear portion 123, or the right side surface of the first sub-portion 211 may not protrude relative to the right side surface of the fixed pole ear portion 123, or W8 may be less than or equal to w1.

[0158] The length of the second sub-portion 212 is L9, L9 is less than l1, and the sum of L9 and L8 is equal to l1. Exemplarily, L9 may be 0.6 mm. In some other embodiments, the sum of L9 and L8 may be less than l1. In addition, the width of the second sub-portion 212 is W9, W9 is less than W8, and equal to w1. The left side of the second sub-portion 212 (not marked in the figure) is retracted relative to the left side of the first sub-portion 211 and is flush with the left side of the fixed pole ear 123, and the right side of the second sub-portion 212 (not marked in the figure) is retracted relative to the right side of the first sub-portion 211 and is flush with the right side of the fixed pole ear 123.

[0159] In some other embodiments, the left side of the second sub-portion 212 may also protrude relative to the left side of the fixed pole ear portion 123, and the right side of the second sub-portion 212 may be retracted relative to the right side of the fixed pole ear portion 123, or the left side of the second sub-portion 212 may also be retracted relative to the left side of the fixed pole ear portion 123, and the right side of the second sub-portion 212 may protrude relative to the right side of the fixed pole ear portion 123, or W9 may also be smaller than or greater than w1.

[0160] The second portion 22 is fixedly connected to the end of the second sub-portion 212 away from the first sub-portion 211. Specifically, the second portion 22 is provided on the inner side 1251 of the bent pole ear portion 125 and covers the inner side of the bent pole ear portion 125. In this embodiment, the second portion 22 is in the shape of a "one". The length of the second portion 22 is L 10 , L 10 Equal to l 10 . For example, L 10 In some other embodiments, L 10 In other words, as long as the length L of the second portion 22 is 10 Less than or equal to the length l of the bent pole ear portion 125 10 Both are acceptable.

[0161] In addition, the width of the second portion 22 is W 10 , W 10 Less than W8, and equal to W8 and w3. Wherein, the left side of the second portion 22 (not marked in the figure) is retracted relative to the left side of the first sub-portion 211, and is flush with the left side of the second sub-portion 212 and the left side of the bent pole ear portion 125 (not marked in the figure), and the right side of the second portion 22 (not marked in the figure) is retracted relative to the right side of the first sub-portion 211, and is flush with the right side of the second sub-portion 212 and the right side of the bent pole ear portion 125 (not marked in the figure). In some other embodiments, the left side of the second portion 22 may also be retracted relative to the left side of the bent pole ear portion 125, or the right side of the second portion 22 may be retracted relative to the right side of the bent pole ear portion 125, or W10 It can also be greater than or equal to w3.

[0162] Please refer to Figure 10. During the assembly of the battery cell assembly 410 and the protection plate assembly 420, the bent pole ear portion 125 of the pole ear 12 needs to be bent relative to the fixed pole ear portion 123 and the movable pole ear portion 124 to achieve electrical connection with the protection plate assembly 420. Since the second part 22 in the first pole ear glue 20 and the second glue portion 32 in the second pole ear glue 30 do not protrude relative to the left and right sides of the bent pole ear portion 125, when the bent pole ear portion 125 is bent relative to the fixed pole ear portion 123 and the movable pole ear portion 124, the second part 22 and the second glue portion 32 will bend together with the bent pole ear portion 125. No excess part of the second part 22 and the second glue portion 32 will be lifted relative to the bent pole ear portion 125 and occupy space in the length direction of the battery 400. This can effectively avoid waste of space in the length direction of the battery 400, which is beneficial to improving the capacity of the battery 400.

[0163] In addition, in this embodiment, the first pole ear glue 20 completely covers the inner side surface 1231 of the fixed pole ear portion 123 and the inner side surface of the bent pole ear portion 125, and the second pole ear glue 30 completely covers the outer side surface 1232 of the fixed pole ear portion 123 and the outer side surface 1252 of the bent pole ear portion 125, which can effectively protect the fixed pole ear portion 123 and the bent pole ear portion 125 in the pole ear 12, prevent the pole ear 12 from contacting other components and causing a short circuit, and ensure the effective use of the battery 400.

[0164] Please refer to Figures 4 and 12. Figure 12 is a schematic diagram of the structure of the battery cell assembly 410 in the battery 400 shown in Figure 10 under the second embodiment. The battery cell assembly 410 shown in Figure 12 has not yet been assembled with the protective plate assembly 420. At this point, the tabs 12, first tab glue 20, and second tab glue 30 of the battery cell 10 in the battery cell assembly 410 are all in an unbent state.

[0165] The battery cell assembly 410 shown in this embodiment differs from the battery cell assembly 410 shown in the first embodiment described above in that both the first tab glue 20 and the second tab glue 30 are trapezoidal. In the first tab glue 20, both the first portion 21 and the second portion 22 are trapezoidal. The widths of the first portion 21 and the second portion 22 gradually increase as the second portion 22 approaches the first portion 21 (in the negative direction of the Y axis in the figure).

[0166] The minimum width of the first portion 21 is W 11 , W 11Greater than w1. The left side of the first portion 21 (not labeled) protrudes relative to the left side of the fixed pole lug 123, and the right side of the first portion 21 (not labeled) protrudes relative to the right side of the fixed pole lug 123. The included angle between the left side of the first portion 21 and the left side of the fixed pole lug 123 is θ1, and the included angle between the right side of the first portion 21 and the right side of the fixed pole lug 123 is θ2. Both θ1 and θ2 are acute angles. For example, θ1 is equal to θ2.

[0167] The minimum width of the second portion 22 is W 12 , W 12 Less than W 11 , and is equal to w1. The maximum width of the second portion 22 is W 13 , W 13 Greater than W 12 , and equal to W 11 . The left side of the second portion 22 (not marked in the figure) protrudes relative to the left side of the bent pole lug portion 125 and is flush with the left side of the first portion 21. The right side of the second portion 22 (not marked in the figure) protrudes relative to the right side of the bent pole lug portion 125 and is flush with the right side of the first portion 21. Specifically, the left side of the second portion 22 is connected to the left side of the bent pole lug portion 125 at one end away from the first portion 21, the left side of the second portion 22 is connected to the left side of the first portion 21 at one end close to the first portion 21, the right side of the second portion 22 is connected to the right side of the bent pole lug portion 125 at one end away from the first portion 21, and the right side of the second portion 22 is connected to the right side of the first portion 21 at one end close to the first portion 21. Among them, the angle between the left side of the second portion 22 and the left side of the bent pole lug portion 125 is θ3, and the angle between the right side of the second portion 22 and the right side of the bent pole lug portion 125 is θ4, and both θ3 and θ4 are acute angles. Exemplarily, θ3 is equal to θ1, and θ4 is equal to θ2.

[0168] It should be noted that, in this embodiment, the structure of the second tab adhesive 30 and the matching relationship between the second tab adhesive 30 and the tab 12 can refer to the relevant description of the first tab adhesive 20 and will not be repeated here.

[0169] Please refer to Figure 10. During the assembly of the battery cell assembly 410 and the protection plate assembly 420, the bent pole ear portion 125 of the pole ear 12 needs to be bent relative to the fixed pole ear portion 123 and the movable pole ear portion 124 to achieve electrical connection with the protection plate assembly 420. Since the second part 22 of the first pole ear glue 20 and the second glue portion 32 of the second pole ear glue 30 protrude less relative to the left and right sides of the bent pole ear portion 125, when the bent pole ear portion 125 is bent relative to the fixed pole ear portion 123 and the movable pole ear portion 124, the second part 22 and the second glue portion 32 will bend together with the bent pole ear portion 125. There will be no excess part in the second part 22 and the second glue portion 32 that is tilted relative to the bent pole ear portion 125 and occupy space in the length direction of the battery 400. This can effectively avoid waste of space in the length direction of the battery 400, which is beneficial to improving the capacity of the battery 400.

[0170] The above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application; the embodiments of this application and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A battery cell assembly, characterized in that: It includes a battery cell and a first tab glue, the battery cell includes a battery cell body and a tab, the tab extends relative to the battery cell body, the tab includes a fixed tab portion and a bent tab portion, the fixed tab portion is fixedly connected to the battery cell body, the bent tab portion is fixedly connected to an end of the fixed tab portion away from the battery cell body, the first tab glue is provided on the inner side surface of the fixed tab portion, and the inner side surface of the bent tab portion is exposed relative to the first tab glue.

2. The battery core assembly according to claim 1, characterized in that The battery cell assembly further includes a second tab glue, which is provided on the outer side surface of the fixed tab portion, and the outer side surface of the bent tab portion is exposed relative to the second tab glue.

3. The battery core assembly according to claim 1, characterized in that The battery cell assembly further includes a second tab glue, which is provided on the outer side surface of the fixed tab portion and the outer side surface of the bent tab portion.

4. The battery core assembly according to claim 3, characterized in that: The second pole ear glue includes a first glue part and a second glue part, the first glue part is arranged on the outer side surface of the fixed pole ear part, the second glue part is fixedly connected to the first glue part, and is arranged on the outer side surface of the bent pole ear part, the left side of the second glue part is flush with the left side surface of the bent pole ear part, and the right side of the second glue part is flush with the right side surface of the bent pole ear part.

5. The battery core assembly according to claim 4, characterized in that: The first adhesive portion includes a first sub-adhesive portion and a second sub-adhesive portion, the first sub-adhesive portion is provided on the outer side of the fixed pole ear portion, the left side of the first sub-adhesive portion protrudes relative to the left side of the fixed pole ear portion, and / or the right side of the first sub-adhesive portion protrudes relative to the right side of the fixed pole ear portion; The second sub-rubber portion is fixedly connected between the first sub-rubber portion and the second rubber portion, and is arranged on the outer side surface of the fixed pole ear portion. The left side surface of the second sub-rubber portion is flush with the left side surface of the fixed pole ear portion, and / or the right side surface of the second sub-rubber portion is flush with the right side surface of the fixed pole ear portion.

6. The battery core assembly according to claim 3, characterized in that: The second tab glue comprises a first glue portion and a second glue portion, wherein the first glue portion is provided on the outer side surface of the fixed tab portion, and the second glue portion is fixedly connected to the first glue portion and provided on the outer side surface of the bent tab portion, and the width of the second glue portion gradually increases along the direction from the second glue portion to the first glue portion; The included angle between the left side of the second adhesive portion and the left side of the bent pole lug portion is an acute angle, and the included angle between the right side of the second adhesive portion and the right side of the bent pole lug portion is an acute angle, or the right side of the second adhesive portion is flush with the right side of the bent pole lug portion; Alternatively, the right side of the second adhesive portion is flush with the right side of the bent pole lug portion, and an angle between the right side of the second adhesive portion and the right side of the bent pole lug portion is an acute angle.

7. The battery cell assembly according to any one of claims 1 to 6, characterized in that: The left side of the first tab glue protrudes relative to the left side of the fixed tab portion, and / or the right side of the first tab glue protrudes relative to the right side of the fixed tab portion.

8. The battery cell assembly according to any one of claims 1 to 6, characterized in that: The first tab glue includes a first portion and a second portion, the first portion is provided on the inner side of the fixed tab portion, a left side of the first portion protrudes relative to the left side of the fixed tab portion, and / or a right side of the first portion protrudes relative to the right side of the fixed tab portion; The second part is fixedly connected to the top side of the fixed pole ear and is arranged on the inner side of the fixed pole ear. The left side of the second part is flush with the left side of the fixed pole ear, and / or the right side of the second part is flush with the right side of the fixed pole ear.

9. The battery core assembly according to any one of claims 1 to 8, characterized in that: There are two tabs, both of which extend relative to the battery cell body and are spaced apart from each other, one of which is a positive tab and the other is a negative tab; There are two first tab glues, which are respectively arranged on the inner side surfaces of the two fixed tab portions. The inner side surface of each bent tab portion is exposed relative to the first tab glue.

10. The battery core assembly according to claim 9, characterized in that: The battery cell includes an electrode unit and a packaging film, the packaging film covers the outer surface of the electrode unit, the electrode unit includes multiple positive pole sheets, multiple negative pole sheets and multiple separators, multiple positive pole sheets and multiple negative pole sheets are stacked alternately, each separator is located between a positive pole sheet and a negative pole sheet, the positive pole ears of the multiple positive pole sheets are electrically connected to form the positive pole ear, and the negative pole ears of the multiple negative pole sheets are electrically connected to form the negative pole ear.

11. The battery cell assembly according to any one of claims 1 to 8, characterized in that: There are three tabs, all of which extend relative to the cell body and are spaced apart from each other, one of which is a positive tab, one is a negative tab, and one is a reference tab; There are three first tab glues, which are respectively arranged on the inner side surfaces of the three fixed tab portions, and the inner side surface of each bent tab portion is exposed relative to the first tab glue.

12. A battery cell assembly, characterized in that: It includes a battery cell and a first tab glue, the battery cell includes a battery cell body and a tab, the tab extends relative to the battery cell body, the tab includes a fixed tab portion and a bent tab portion, the fixed tab portion is fixedly connected to the battery cell body, the bent tab portion is fixedly connected to an end of the fixed tab portion away from the battery cell body, the first tab glue includes a first part and a second part, the first part is arranged on the inner side surface of the fixed tab portion, the second part is fixedly connected to the top side of the first glue portion, and is arranged on the inner side surface of the bent tab portion, the left side of the second part is flush with the left side surface of the bent tab portion, and the right side of the second part is flush with the right side surface of the bent tab portion.

13. A battery cell assembly, characterized in that: The battery cell comprises a battery cell and a first tab glue, wherein the battery cell comprises a battery cell body and a tab, wherein the tab extends relative to the battery cell body, and wherein the tab comprises a fixed tab portion and a bent tab portion, wherein the fixed tab portion is fixedly connected to the battery cell body, and the bent tab portion is fixedly connected to an end of the fixed tab portion away from the battery cell body, wherein the first tab glue comprises a first portion and a second portion, wherein the first portion is arranged on the inner side surface of the fixed tab portion, and the second portion is fixedly connected to the top side of the first portion and is arranged on the inner side surface of the bent tab portion, and wherein the width of the second portion gradually increases in the direction toward the first portion; The angle between the left side of the second portion and the left side of the bent pole lug portion is an acute angle, the angle between the right side of the second portion and the right side of the bent pole lug portion is an acute angle, or the right side of the second portion is flush with the right side of the bent pole lug portion; Alternatively, the right side surface of the second portion is flush with the right side surface of the bent pole lug portion, and the angle between the right side surface of the second portion and the right side surface of the bent pole lug portion is an acute angle.

14. A battery, characterized in that: It comprises a battery cell assembly and a protection circuit board as described in any one of claims 1 to 13, the pole ear further comprising a movable pole ear portion, the movable pole ear portion is fixedly connected to an end of the bent pole ear portion away from the fixed pole ear portion, the bent pole ear portion is in a bent state, the fixed pole ear portion and the movable pole ear portion are spaced apart and arranged relative to each other, and the protection circuit board is located on a side of the movable pole ear portion away from the fixed pole ear portion, and is electrically connected to the movable pole ear portion.

15. The battery according to claim 14, characterized in that The length of the protection circuit board is less than or equal to 3.5 mm.

16. An electronic device, characterized in that: The device comprises a housing and the battery according to claim 14 or 15, wherein the battery is installed inside the housing.

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