CN113644389B

CN113644389B - Battery module and manufacturing method thereof

Info

Publication number: CN113644389B
Application number: CN202010343221.4A
Authority: CN
Inventors: 何志明
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2023-05-16
Anticipated expiration: 2040-04-27
Also published as: CN113644389A

Abstract

The disclosure relates to a battery module and a manufacturing method thereof, wherein the battery module comprises: a multi-layer electrode sheet; the multi-layer electrode plates are stacked or wound; the electrode lugs are respectively connected to the edges of the multilayer electrode plates; the tab packaging body is positioned on at least one side face of the tab; and the plurality of tabs with overlapped positions are fixed together through the tab packaging body. Through the technical scheme of the embodiment of the disclosure, the multilayer electrode plate of the battery is provided with a plurality of lugs packaged together, so that the charge and discharge power of the battery can be improved, the impedance of the battery can be reduced, and the charge and discharge speed can be improved.

Description

Battery module and manufacturing method thereof

Technical Field

The disclosure relates to the field of batteries, in particular to a battery module and a manufacturing method thereof.

Background

With the continuous updating of various electronic devices, the requirements on batteries of the electronic devices are also increasing. High battery capacity, fast charge, small size, etc. are all major directions of research in battery development. The battery structure has a critical influence on the energy density and the quick charge capability of the battery, and how to raise the energy density of the battery while quickly charging is one of important research subjects of the battery structure design.

Disclosure of Invention

The disclosure provides a battery module and a manufacturing method thereof.

According to a first aspect of embodiments of the present disclosure, there is provided a battery module including:

a multi-layer electrode sheet; the multi-layer electrode plates are stacked or wound;

the electrode lugs are respectively connected to the edges of the multilayer electrode plates;

the tab packaging body is positioned on at least one side face of the tab;

and the tabs with overlapped positions are fixed together through the tab packaging body.

In some embodiments, the tab package includes: the tab adhesive is attached to at least one side face of the tab; wherein, the tab is sheet structure, at least one side is: at least one of the two faces of the sheet structure.

In some embodiments, the tab adhesive material comprises one or a combination of the following:

polypropylene PP;

polyethylene PE;

polyester resin PET;

polyimide PI.

In some embodiments, the tab glue is located in at least a partial region of at least one side of the tab; the thickness of the tab adhesive is 5 to 30 micrometers.

In some embodiments, the tab glue has a width greater than the width of the tab and a length less than the length of the tab;

at least part of the area of the tab, which is far away from one end of the electrode plate, is not covered by the tab glue.

In some embodiments, the battery module includes: a battery package; the battery package wraps the multi-layer electrode sheet.

In some embodiments, the battery package has an opening thereon, the tab package is fixed at the opening, and at least a portion of the tab is located outside the battery package.

In some embodiments, the wound multi-layer electrode sheet is formed by synchronously winding a positive electrode sheet and a negative electrode sheet;

the stacked multi-layer electrode sheet is formed by alternately stacking positive electrode sheets and negative electrode sheets;

the lugs of the positive electrode plate are fixed together, and the lugs of the negative electrode plate are fixed together;

the lugs of the positive electrode plate and the negative electrode plate are mutually separated.

In some embodiments, the electrode sheet comprises a positive electrode sheet and a negative electrode sheet; the positive electrode sheet and the negative electrode sheet are distributed in a crossed manner;

the battery module further includes:

a diaphragm; the separator is positioned between the positive electrode sheet and the negative electrode sheet.

According to a second aspect of the present disclosure, there is provided a method of manufacturing a battery module, the method including:

attaching a tab package to the side surface of each tab of the electrode sheet; the edge of the electrode plate is provided with a plurality of lugs;

winding or stacking to form a multi-layer electrode sheet, wherein the positions of the plurality of tabs overlap after winding or stacking;

heating and softening the tab package to connect the tab packages attached to the plurality of tabs;

and cooling the tab package to fix the tabs together through the tab package.

In some embodiments, the attaching the tab package on the side surface of each tab of the electrode tab includes:

and a thermoplastic tab adhesive is adhered to the side surface of each tab of the electrode sheet.

In some embodiments, the heating softens the tab packages to interconnect the tab packages attached to the plurality of tabs, comprising:

softening the tab package by heating the tab package to between 120 and 160 degrees celsius;

and pressing the softened plurality of electrode lugs, and sealing and fixing the plurality of electrode lugs.

In some embodiments, the method further comprises:

wrapping a battery package body around the electrode plate; wherein, the battery package body is provided with an opening, and at least part of the plurality of lugs is positioned outside the battery package body;

and heating the tab package body at the opening of the battery package body to soften the tab package body and hermetically connect the tab package body with the opening of the battery package body.

In some embodiments, the method further comprises:

forming a plurality of tabs at edges on the sheet-shaped current collector;

and coating active materials in areas except the areas where the sheet-shaped current collector forms the plurality of tabs to form the electrode sheet.

In some embodiments, the forming the electrode sheet by coating an active material on a region of the sheet-shaped current collector except for the plurality of tabs includes:

coating a compound material containing lithium element on the areas except the areas where the flaky current collector forms the plurality of tabs to form a positive electrode plate; and/or the number of the groups of groups,

and coating carbon materials on the areas except the areas where the sheet-shaped current collector forms the plurality of lugs to form the negative electrode sheet.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: in the technical scheme of the embodiment of the disclosure, the multi-layer electrode plate of the battery is provided with a plurality of lugs packaged together. The lugs are connected in parallel, so that the impedance is small, the charge transmission efficiency of the electrode plate can be increased, the charge and discharge power of the battery is improved, and the charge and discharge speed is increased. In addition, the plurality of lugs are packaged together, the plurality of lugs are not required to be welded on one large lug, the manufacturing process is simple, the space occupied by welding is saved, the area of the electrode plate can be increased under the same battery size, and therefore the battery energy density is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic view illustrating a structure of a battery module according to an exemplary embodiment;

FIG. 2 is a schematic illustration of a battery tab coated with tab glue according to an exemplary embodiment;

FIG. 3 is a schematic cross-sectional view of a battery tab coated with tab glue according to an exemplary embodiment;

fig. 4 is a flowchart illustrating a method of manufacturing a battery module according to an exemplary embodiment;

fig. 5A is a schematic diagram of a positive electrode sheet and a negative electrode sheet, according to an example embodiment;

FIG. 5B is a schematic diagram showing electrode sheets rolled to form a jellyroll according to an exemplary embodiment;

FIG. 6 is a schematic diagram of a packaged battery shown in accordance with an exemplary embodiment;

FIG. 7 is a schematic diagram of a positive substrate having a plurality of tabs, according to an example embodiment;

FIG. 8 is a schematic diagram illustrating a plurality of tab stacks after crimping, according to an example embodiment;

FIG. 9 is a schematic diagram illustrating welding of a plurality of tabs to a large tab according to an exemplary embodiment;

FIG. 10 is a second schematic diagram of a packaged battery shown according to an exemplary embodiment;

FIG. 11 is a schematic diagram illustrating pre-packaging a plurality of tabs according to an example embodiment;

FIG. 12 is a third schematic diagram of a packaged battery shown according to an exemplary embodiment;

fig. 13 is a block diagram showing a physical structure of an electronic device according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

Fig. 1 is a schematic view illustrating a structure of a battery module according to an exemplary embodiment, and as shown in fig. 1, the battery module 100 includes:

a multilayer electrode sheet 110; the multi-layer electrode plates are stacked or wound;

a plurality of tabs 120 respectively connected to edges of the multi-layered electrode sheet 110;

a tab package 130 located on at least one side of the tab 120;

the tabs 120, which are overlapped in position, are fixed together by the tab package 130.

The tab is a raw material of a rechargeable battery including a lithium ion battery, a sodium ion battery, and the like. The tab is commonly used in lithium ion polymer batteries as a metal conductor for extraction from the positive and negative electrodes of the battery. The battery comprises a positive electrode and a negative electrode inside, and the electrode lugs are used for leading out the positive electrode and the negative electrode and are connected to the outside of the battery. The portion of the tab outside the battery can then serve as a contact point for the external circuitry of the battery. Therefore, the tab is a bridge for charge transfer inside and outside the battery.

In the embodiment of the disclosure, the battery module is provided with a plurality of electrode plates, and the plurality of electrode plates can be stacked, or can be a coiled structure formed by repeatedly winding one electrode plate. The multi-layer electrode sheet has a plurality of tabs, for example, one tab per layer electrode sheet or one tab per two layers electrode sheet. The electrode lugs are positioned at the edges of the multi-layer electrode plates, the positions of the electrode lugs are overlapped with each other, adjacent electrode lugs are fixed together through the electrode lug packaging body, and the electrode lugs are fixedly connected with each other. Here, the tab package may be an adhesive or a connection member, which can fix a plurality of tabs together in a small space, so as to facilitate subsequent packaging with components such as a housing of a battery.

Therefore, the plurality of lugs can reduce the impedance of the battery module, improve the charge conduction performance between the battery module and an external circuit and improve the charging speed of the battery. And need not to weld a plurality of tabs on same big tab, reduced the occupation in battery space to compare the battery module with a plurality of tab welding on same big tab has promoted the available space of electrode slice, and then promotes battery energy density, promotes battery capacity.

The tab package may be a liquid or viscous tab adhesive applied to the outer side of the tab; or solid tab glue is firstly placed on the surface of the tab, and then is adhered to the surface of the tab after being softened by heating; the solid tab glue can be stuck on the tab surface by using sticky glue, and then the tab glue is softened by heating to be attached on the tab surface and connected with other tabs. Fig. 2 is a schematic view of the tab 10 with the tab adhesive 20 attached thereto; fig. 3 is a cross-sectional view of the tab 10 with the tab glue 20 attached thereto. In the embodiment of the disclosure, the tab adhesive may be attached to the entire side surface around the tab, or attached to a partial area of the side surface around the tab, for example, wrapping around the tab by one turn, or attaching the tab adhesive to a surface having another tab in an adjacent direction.

The tab glue can be a thermoplastic material, and can be softened in a heating state to form a film on the surface of the tab and be tightly attached to the tab; after cooling and solidification, two adjacent tabs can be tightly connected together. Each tab is fixed with the adjacent tab by coating tab glue, so that a plurality of tabs of the electrode plate can be connected to form a large tab. Therefore, the adjacent tabs are fixed by using the tab glue, so that little space can be occupied, and a good sealing effect can be achieved, so that gaps do not exist among a plurality of tabs, and the battery is convenient to isolate the environment inside and outside after subsequent packaging.

In some embodiments, the tab adhesive material comprises at least one of the following:

polypropylene PP;

polyethylene PE;

polyester resin PET;

polyimide PI.

The tab adhesive can be one or more composite materials of the polymer materials. Polypropylene is colorless, odorless, nontoxic, and a translucent solid waxy material that is also resistant to corrosion at normal temperatures. The polypropylene can be softened at about 155 ℃, so that the polypropylene can be coated on the lugs in a softened state at about 155 ℃, and the lugs are connected and cooled down, so that the lugs are connected and fixed.

Polyethylene is also a odorless, nontoxic, milky waxy solid, and resistant to most acid and alkali corrosion. The melting point of the polyethylene is 130-145 ℃, so that the polyethylene is coated on the surface of the tab after being melted in the temperature range, and then the tab is cooled after two adjacent tabs are connected, so that a plurality of tabs can be connected and fixed with each other.

The polyester resin is a milky or pale yellow crystal fixed body, and is nontoxic, odorless, and resistant to acid and alkali corrosion. Here, it may be softened at around 100 to 230 degrees celsius. Similar to polypropylene and polyethylene, the material is thermoplastic material, can be coated on the lugs at higher temperature, and can be used as an adhesive to fix a plurality of lugs.

Polyimide is a polymer material with better heat resistance, is widely applied to various industrial fields, can be softened under the action of a proper solvent or can be compounded with other materials, can be used as an adhesive, and the softened polyimide is coated on the tab to fix a plurality of tabs.

Most of the above polymer materials have thermoplastic properties, and one or more of them may be in a liquid state at a certain temperature range, thereby acting as an adhesive. The material is used as the tab packaging body to fix a plurality of tabs together, so that the battery module can be packaged conveniently. In addition, the materials are stable in property and have good corrosion resistance, so that the packaged tab can be protected, and the service life of the battery module is prolonged.

In the embodiment of the disclosure, an extremely thin tab adhesive, for example, about 5 to 30 micrometers thick, may be attached to the outer surface of the tab. Therefore, the tab glue does not occupy excessive space to cause deformation or distortion of the tab, and the tab can be packaged and fixed together while being protected.

In the embodiment of the disclosure, the tab glue is a prefabricated rectangular sheet solid, and can soften and tightly connect adjacent tabs after heating. The width of the tab glue is larger than that of the tab, so that when the tab glue is attached to the surface of the tab, two sides of the tab can expose part of the tab. In this way, in the case where there is a positional deviation in stacking of a plurality of tabs, the adhesion is prevented from being weak.

In addition, the length of the tab glue is smaller than that of the tab, so that part of the tab can be exposed at one end of the tab, which is far away from the electrode plate, for realizing electric connection with an external circuit.

In the embodiment of the disclosure, the battery package is used for isolating the internal environment and the external environment of the battery, so that the charge movement in the battery is not interfered by the external environment. The battery package body needs to wrap and seal the multi-layer electrode plates inside the battery, so that the internal and external environments of the battery are isolated from each other. In the embodiments of the present disclosure, the battery package may employ a hard or soft plastic material, such as an aluminum plastic film, or the like. In the embodiment of the disclosure, the battery module can be a soft package lithium ion battery, and the aluminum plastic film is used as a protective film of the soft package lithium ion battery, so that the environment inside and outside the battery can be isolated. The aluminum plastic film is composed of an outer nylon layer, an adhesive, an intermediate aluminum foil, an adhesive and an inner heat sealing layer, has good barrier capability, puncture resistance, electrolyte stability, high temperature resistance and insulativity, can effectively protect the internal structure of the battery, and improves the use safety and service life of the battery.

The tab is used for connecting the inside and the outside of the battery and is used as a connecting terminal of an external circuit. Therefore, in the embodiment of the disclosure, the battery package body is provided with an opening, and the tab can extend out of the battery package body from the opening. Because the surface of the tab is coated with the tab package, the battery package can be connected and fixed with the tab through the tab package at the opening. For example, the tab surface has an adhesive to connect and fix the plurality of tabs together, and the adhesive on the tab of the outermost layer may be connected to the battery package. For another example, the tab surface has solid tab glue, and when the tab is placed at the opening of the battery package, the tab glue is heated and softened, and then is appropriately pressurized to form a tightly connected sealing structure between the opening and the tab glue.

In this way, the tab can be fixed on the battery package, and the tab package and the battery package are connected to each other, so that the inside of the battery can be sealed, and only the tab is exposed outside the battery package.

In the embodiment of the disclosure, the positive electrode sheet and the negative electrode sheet are formed in a multi-layer structure by a curling and encircling manner, and the positive electrode sheet and the negative electrode sheet are stacked in a crossing manner. That is, the positive electrode sheet and the negative electrode sheet are stacked and then curled and surrounded to form a multi-layered electrode sheet. If the electrode plates are stacked, the electrode plates are formed by alternately stacking a plurality of positive electrode plates and negative electrode plates, the positive electrode plates are connected in parallel, and the negative electrode plates are connected in parallel. Because the positive electrode plate and the negative electrode plate are mutually separated and cannot be conducted, the positive electrode plate and the negative electrode plate are respectively provided with a plurality of lugs, the lugs of the positive electrode plate are fixedly connected with each other, the lugs of the negative electrode plate are fixedly connected with each other, and two groups of lugs which are mutually separated are formed. For example, the electrode tab and the tab may be integrally formed, electrically connected to each other, and a plurality of tabs connected in parallel to each other. The lugs of the positive electrode plate and the negative electrode plate which are mutually separated are connected to the outside of the battery module, so that the battery can be used as the positive electrode and the negative electrode of the battery to be connected with an external circuit.

the battery module further includes:

In the process of manufacturing the battery, the diaphragm is arranged between the positive electrode plate and the negative electrode plate, the positive electrode plate, the diaphragm and the negative electrode plate are stacked, and then the positive electrode plate, the diaphragm and the negative electrode plate are synchronously curled and wound into a coil shape, so that a multi-layer electrode plate structure is formed. The stacked structure is formed by alternately stacking a plurality of electrode sheets and separators in the order of positive electrode sheets, separators and negative electrode sheets.

The separator has the main function of separating the positive electrode from the negative electrode of the battery, preventing the two electrodes from being in contact and short-circuited, and also has the function of passing electrolyte ions. The material of the separator is an insulator material and has a porous structure capable of blocking the passage of electrons but capable of passing ions. Therefore, in the process of charging and discharging, conductive ions in the battery can move between the two poles through the diaphragm, so that the effect of charging and discharging is achieved.

Fig. 4 is a flowchart of a method for manufacturing a battery module according to an embodiment of the disclosure, where the method includes:

step S101, attaching a tab package to the side surface of each tab of an electrode sheet; the edge of the electrode plate is provided with a plurality of lugs;

step S102, winding or stacking to form a multi-layer electrode sheet, wherein the positions of the plurality of tabs are overlapped after winding or stacking;

step S103, heating and softening the tab package body to enable the tab package bodies attached to the tabs to be connected with each other;

and step S104, cooling the tab package body to fix the tabs together through the tab package body.

The battery realizes the functions of storing charge and releasing charge by the electrode plate, and the electrode plate is connected with the electrode lug as a component connected with an external circuit. The edge of the electrode plate is connected with a plurality of electrode lugs which are connected in parallel, so that the impedance can be reduced, and the charge and discharge rate of the battery can be improved.

In the embodiment of the present disclosure, a tab package is attached to a side surface of each tab of an electrode sheet for fixing and connecting a plurality of tabs. After the electrode sheets are wound or stacked, a multi-layered electrode sheet may be formed. At least one tab may be provided on each of the different layers of the multi-layer electrode sheet, such that the plurality of tabs may overlap each other at the same position. Therefore, the tab packages on the respective tabs are respectively in contact with the adjacent tabs. Then, the tab package can be tightly adhered to the tab by heat softening, and the adjacent tabs are connected to each other. Thus, a plurality of tabs can be connected and fixed together. In addition, the heating process can be properly pressurized, so that a plurality of tabs are tightly pressed together and are connected in a sealing way through the tab packaging body, and a sealed whole is formed. After the tab package is cooled, the tabs can form a stable integrated structure.

The material of the tab adhesive may be one or a combination of some of PP, PE, PET and PI mentioned in the above embodiments. These materials have thermoplastic properties, are solid at ordinary temperature, and soften or melt when heated to a certain temperature, thereby changing morphology. The tab glue with thermoplastic property is attached to the tab, so that the tab glue can be softened after being heated and a plurality of tabs can be fixedly connected together.

The heating softens the tab packages to interconnect the tab packages attached to the plurality of tabs, comprising:

The temperature of the heating tab package may be determined according to the characteristics of the materials, and with the materials in the above embodiments, the materials may be softened at a temperature of about 120 to 160 degrees celsius, and then the tabs are tightly connected by pressing, and fixed together to form a sealed connection structure.

In some embodiments, the method further comprises:

Because the electrode lug is provided with the electrode lug packaging body, the opening of the battery packaging body can be heated and pressed again, and the electrode lug packaging body is utilized to connect and seal the electrode lug and the opening, so that a sealing structure with mutually isolated inside and outside is formed.

In some embodiments, the method further comprises:

forming a plurality of tabs at edges on the sheet-shaped current collector;

The current collector is a structure for collecting current, and is mainly metal foil such as copper foil and aluminum foil on the lithium ion battery. In an embodiment of the present disclosure, a tab is included on a current collector. And in the area outside the electrode lug, the electrode lug is coated with an active material and then serves as an electrode plate, the active material has the function of storing charges, and in the charge and discharge process, the current collector collects the current generated by the battery active material under the action of an electric field so as to form larger current to be output outwards, and then the current can be output to the outside of the battery through the electrode lug.

Active materials are generally classified into positive active materials and negative active materials, and for lithium ion batteries, the positive active materials include: lithium cobalt oxide, lithium manganate or lithium nickel cobalt manganate and other compound materials containing lithium elements; and the negative electrode active material is generally graphite, hard carbon, or soft carbon material, or the like.

The disclosed embodiments also provide the following examples:

the polymer soft package lithium ion battery is packaged by an aluminum plastic film to isolate the internal environment and the external environment of the battery, so that the battery forms an independent environment, thereby preventing external interference. The tab of the battery is used as a conductive device for connecting the inside and the outside of the battery, and the structure and the packaging mode of the tab have great influence on the energy density and the charge and discharge power of the battery.

In some embodiments, as shown in fig. 5A, a tab 430 is welded to each of the positive electrode sheet 410 and the negative electrode sheet 420, and then, as shown in fig. 5B, the positive electrode sheet 410, the separator 440, and the negative electrode sheet 420 are stacked and wound around a winding core, and then fixed by a gummed paper 510. At this time, the batteries share one positive electrode tab and one negative electrode tab.

Then, as shown in fig. 6, the winding core 620 is wrapped by the aluminum-plastic film 610, and the aluminum-plastic film 610 and the positive electrode tab and the negative electrode tab (only one tab 630 is shown in fig. 6 as a side view) are thermally packaged, respectively, to form a final battery structure.

The anode and the cathode of the structure are respectively provided with a tab, so that the ohmic impedance is high, and the charge and discharge rate is influenced. And in the process of charging and discharging, the local current density is high, and the local overheating of the battery is easy to occur, so that the service life of the battery is influenced.

In other embodiments, a multi-tab design is used, as shown in fig. 7, where a plurality of tabs 720 are distributed on the edge of the positive electrode substrate 710. The negative electrode substrates are identical and have a plurality of tabs. The winding is performed by winding the battery substrate into a winding core, as shown in fig. 8, a plurality of tabs 810 of the positive electrode are stacked together, and a plurality of tabs of the negative electrode are stacked together. Then, as shown in fig. 9, a plurality of tabs 810 of the positive electrode are welded to one positive electrode tab 910, and a plurality of tabs 820 of the negative electrode are welded to one negative electrode tab 920.

Finally, as shown in fig. 10, the winding core 1020 is wrapped by an aluminum plastic film 1010, and the welding point 1030 is located inside the aluminum plastic film, and the large tabs 1040 (only one large tab is shown in fig. 10, including a positive large tab and a negative large tab).

The structure has the advantages that the positive electrode and the negative electrode are respectively provided with a plurality of lugs, the ohmic resistance is small, the charging rate is high, the current density in charging and discharging is low, and the overheating phenomenon is not easy to occur. However, this method requires a welding process of a plurality of tabs and one large tab, the manufacturing process is complicated, and the welding area occupies a space inside the battery, so that the area of the electrode tab is reduced, and the energy density of the battery is reduced.

In the disclosed embodiment, a plurality of tabs are packaged and a thin tab adhesive, for example, 5 tabs with a thickness of 30 microns. The material of the tab adhesive can be one or two of PP, PE, PET and PI. The electrode plate after winding is curled so that a plurality of lugs are stacked at the same position, and the lugs are connected with each other through lug glue, so that the effect of pre-packaging is achieved. As shown in fig. 11, a plurality of tabs 1120 may be fixed together by tab glue 1110.

Then, as shown in fig. 12, the winding core 1220 is wrapped with an aluminum plastic film 1210 and fixedly connected with the tab 1120 through the tab glue 1110, thereby forming the final battery package.

Therefore, the battery is charged and discharged through the plurality of lugs, the charging speed is improved, the current density is low, and the phenomenon of overheating is not easy to occur; meanwhile, as a plurality of tabs are not required to be welded on one large tab, the space required by welding inside the battery is saved, and electrode plates with larger area can be used, so that the energy density of the battery is improved.

Fig. 13 is a block diagram of the physical structure of an electronic device 1300, according to an example embodiment. For example, the electronic device 1300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 13, an electronic device 1300 may include one or more of the following components: a processing component 1301, a memory 1302, a power component 1303, a multimedia component 1304, an audio component 1305, an input/output (I/O) interface 1306, a sensor component 1307, and a communication component 1308.

Processing component 1301 generally controls overall operation of electronic device 1300, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing component 1301 may include one or more processors 1310 to execute instructions to perform all or part of the steps of the methods described above. In addition, processing component 1301 may also include one or more modules that facilitate interactions between processing component 1301 and other components. For example, processing component 1301 can include a multimedia module to facilitate interaction between multimedia component 1304 and processing component 1301.

Memory 1310 is configured to store various types of data to support operations at electronic device 1300. Examples of such data include instructions for any application or method operating on the electronic device 1300, contact data, phonebook data, messages, pictures, video, and so forth. The memory 1302 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically Erasable Programmable Read Only Memory (EEPROM), erasable Programmable Read Only Memory (EPROM), programmable Read Only Memory (PROM), read Only Memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

The power supply assembly 1303 provides power to the various components of the electronic device 1300. The power supply assembly 1303 may include: a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for electronic device 1300. The power module 1303 includes a battery module as provided in any of the above embodiments.

The multimedia component 1304 includes a screen that provides an output interface between the electronic device 1300 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia assembly 1304 includes a front camera and/or a rear camera. When the electronic device 1300 is in an operational mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and/or rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 1305 is configured to output and/or input audio signals. For example, the audio component 1305 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 1300 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 1310 or transmitted via the communication component 1308. In some embodiments, the audio assembly 1305 also includes a speaker for outputting audio signals.

The I/O interface 1306 provides an interface between the processing assembly 1301 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 1307 includes one or more sensors for providing status assessment of various aspects of the electronic device 1300. For example, the sensor assembly 1307 may detect an on/off state of the electronic device 1300, a relative positioning of the components, such as a display and keypad of the electronic device 1300, the sensor assembly 1307 may also detect a change in position of the electronic device 1300 or a component of the electronic device 1300, the presence or absence of a user's contact with the electronic device 1300, an orientation or acceleration/deceleration of the electronic device 1300, and a change in temperature of the electronic device 1300. The sensor assembly 1307 may comprise a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 1307 may also include a light sensing sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1307 can also comprise an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 1308 is configured to facilitate communication between the electronic device 1300 and other devices, either wired or wireless. The electronic device 1300 may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 1308 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1308 further comprises a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, or other technologies.

In an exemplary embodiment, the electronic device 1300 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 1302, including instructions executable by processor 1310 of electronic device 1300 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

A non-transitory computer readable storage medium, which when executed by a processor of a mobile terminal, enables the mobile terminal to perform any one of the methods provided in the embodiments above.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. The utility model provides a battery module, its characterized in that, battery module is soft packet of battery module, includes:

the tab packaging body is positioned on at least one side face of the plurality of tabs;

the plurality of tabs with overlapped positions are fixed together through the tab packaging body;

the battery package is provided with an opening, the tab package is fixed at the opening, and at least part of the tabs are positioned on the outer side of the battery package.

2. The battery module according to claim 1, wherein the tab package body comprises: the tab glue is attached to at least one side face of the plurality of tabs; wherein, a plurality of utmost point ear is sheet structure, at least one side is: at least one of the two faces of the sheet structure.

3. The battery module of claim 2, wherein the tab adhesive material comprises one or a combination of the following:

polypropylene PP;

polyethylene PE;

polyester resin PET;

polyimide PI.

4. The battery module according to claim 2, wherein the tab adhesive is located in at least a partial region of at least one side surface of the plurality of tabs; the thickness of the tab adhesive is 5 to 30 micrometers.

5. The battery module of claim 4, wherein the tab glue has a width greater than the width of the plurality of tabs and a length less than the length of the plurality of tabs;

at least a partial area of one end of the plurality of tabs, which is far away from the electrode sheet, is not covered by the tab glue.

6. The battery module according to any one of claims 1 to 5, wherein the battery package wraps the multi-layered electrode sheet.

7. The battery module according to any one of claims 1 to 5, wherein the wound multi-layered electrode sheet is formed by synchronously winding a positive electrode sheet and a negative electrode sheet; the stacked multi-layer electrode sheet is formed by alternately stacking positive electrode sheets and negative electrode sheets;

8. The battery module according to any one of claims 1 to 5, wherein the electrode sheet includes a positive electrode sheet and a negative electrode sheet; the positive electrode sheet and the negative electrode sheet are distributed in a crossed manner;

the battery module further includes:

9. The manufacturing method of the battery module is characterized in that the battery module is a soft package battery module, and the method comprises the following steps:

cooling the tab package to fix the plurality of tabs together through the tab package;

wrapping a battery package body around the electrode plate; the battery package body is provided with an opening, and at least part of the plurality of tabs are positioned outside the battery package body.

10. The method of manufacturing according to claim 9, wherein attaching the tab package to the side surface of each tab of the electrode tab comprises:

11. The method of manufacturing of claim 10, wherein the heating softens the tab packages to interconnect the tab packages attached to the plurality of tabs, comprising:

12. The method of manufacturing of claim 9, further comprising:

13. The method of manufacturing of claim 9, further comprising:

forming a plurality of tabs at edges on the sheet-shaped current collector;

14. The method of manufacturing according to claim 13, wherein the forming the electrode sheet by applying an active material to the area of the sheet-like current collector other than the plurality of tabs comprises: