CN115986261A

CN115986261A - Battery, battery parameter determination method and electronic equipment

Info

Publication number: CN115986261A
Application number: CN202211693563.4A
Authority: CN
Inventors: 袁锦; 郭志良
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-04-18

Abstract

The application aims at providing a battery, a parameter determination method of the battery and electronic equipment, wherein the battery comprises a naked battery cell and a cladding body, the cladding body is enclosed to form an accommodating cavity for accommodating the naked battery cell, a heat exchange cavity is further arranged in the cladding body, the heat exchange cavity and the accommodating cavity are separated and arranged, a heat exchange fluid is filled in the heat exchange cavity and used for exchanging heat with the naked battery cell, and the heat exchange fluid is a thermal phase change material.

Description

Battery, battery parameter determination method and electronic equipment

Technical Field

The application belongs to the technical field of electronic technology, and particularly relates to a battery, a battery parameter determination method and electronic equipment.

Background

With the rapid development of electronic technology, more and more people use intelligent electronic devices.

In order to improve the use experience of the intelligent electronic equipment, the quality of the battery is always the research focus in the field, and in the related technology, the charging time of the intelligent electronic equipment is long, so that the normal use of the intelligent electronic equipment is influenced.

Disclosure of Invention

The application aims to provide a battery, a battery parameter determining method and electronic equipment, which can solve the problem that intelligent electronic equipment is long in charging time.

In a first aspect, an embodiment of the application provides a battery, including naked electric core and cladding body, the cladding body encloses to close and forms and is used for acceping the accepting chamber of naked electric core, the cladding is internal still to be equipped with the heat transfer chamber, and the heat transfer chamber separates the setting with accepting the chamber, and the heat transfer intracavity is filled there is the heat transfer fluid for with the heat exchange of naked electric core, the heat transfer fluid is hot phase change material.

In a second aspect, an embodiment of the present application provides a method for determining parameters of a battery, where the method is used for the battery, and includes:

obtaining the heat generated when the battery is charged according to the charging current and the charging impedance;

obtaining the mass parameters of the heat exchange fluid in the heat exchange cavity according to the heat, the specific heat capacity of the heat exchange fluid, a preset temperature value and the latent heat value of vaporization of the heat exchange fluid;

obtaining the vaporization expansion volume of the heat exchange fluid in the heat exchange cavity according to the preset air pressure value, the mass parameter and the preset temperature value of the battery;

and obtaining the gap value of the heat exchange cavity and the thickness of the cladding body according to the vaporization expansion volume.

In a third aspect, an embodiment of the present application provides an electronic device, including the above battery.

In the embodiment of this application, on the one hand, through setting up the cladding body, can provide the cladding structure for naked electric core, make naked electric core have relatively independent operational environment to improve the mechanical strength of battery, on the other hand, through directly setting up the heat transfer chamber on the cladding body of naked electric core, can effectively cool down to naked electric core, the quick heat dissipation of the battery of being convenient for, and then increase the charging power that the battery can bear by a wide margin, it is long showing and shortening to make charging of battery.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of the internal structure of a battery according to some embodiments of the present disclosure;

FIG. 2 is a schematic diagram of the internal structure of a battery according to further embodiments of the present application;

FIG. 3 is a schematic diagram of a battery according to further embodiments of the present application;

FIG. 4 is a schematic diagram of the internal structure of a battery according to further embodiments of the present application;

FIG. 5 is a schematic diagram of a battery according to still other embodiments of the present application;

FIG. 6 is a schematic view of the internal structure of a battery according to further embodiments of the present application;

FIG. 7 is an enlarged schematic view at A in FIG. 6;

FIG. 8 is a schematic block diagram of a temperature control system according to some embodiments of the present application;

FIG. 9 is a schematic flow chart diagram of a method for determining battery parameters in some embodiments of the present application;

FIG. 10 is a schematic diagram of a structure at a battery in an electronic device according to some embodiments of the present application;

FIG. 11 is a schematic diagram of a structure at a battery in an electronic device according to further embodiments of the present application.

Reference numerals:

100. a battery; 200. a vapor chamber; 300. a graphite sheet; 400. a mainboard heating element;

10. a naked battery cell; 101. a tab;

20. a cladding body; 201. an accommodating cavity; 202. a heat exchange cavity; 203. a first portion; 204. a second portion; 205. a third portion; 206. a housing; 207. a cover plate; 208. a first housing; 209. a second housing;

30. a tab leading-out hole; 301. a duct; 302. a porous body;

40. injecting holes;

110. a control circuit; 120. a vacuum gauge; 130. a thermometer; 140. a vacuum pump.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of those features. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Fig. 1 is a schematic diagram of the internal structure of a battery 100 according to some embodiments of the present disclosure.

As shown in fig. 1, according to some embodiments of the present application, there is provided a battery 100 including a bare cell 10 and a cover 20. Cladding body 20 encloses to close and forms the chamber 201 of acceping that is used for acceping naked electric core 10, still is equipped with heat transfer chamber 202 in the cladding body 20, and heat transfer chamber 202 with accept chamber 201 and separate the setting, the intussuseption of heat transfer chamber 202 is filled with the heat transfer fluid for with the heat exchange of naked electric core 10, the heat transfer fluid is hot phase change material.

The bare cell 10 refers to a component of the battery 100 for electrochemical reactions to occur. Illustratively, the bare cell 10 may be formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The parts of the positive pole piece and the negative pole piece with the active materials form the main body part of the electrode body, and the parts of the positive pole piece and the negative pole piece without the active materials form tabs respectively. For example, the accommodating cavity 201 may further be filled with an electrolyte (not shown in the figure) for performing an electrochemical reaction between the positive electrode tab and the negative electrode tab.

The accommodating cavity 201 refers to a cavity in the cover 20 for accommodating the bare cell 10, and for example, the accommodating cavity 201 may be formed by enclosing the cover 20.

The coating body 20 is a component covering and wrapping the bare cell 10, and may be a hard structure, such as a metal material or an injection molding material. For example, the cladding 20 may be made of stainless steel or aluminum alloy.

The heat exchange cavity 202 refers to a chamber provided in the clad 20 for filling with a heat exchange fluid, and exemplarily, the heat exchange cavity 202 may be a sandwich structure provided in a plate constituting the clad 20. For example, when the cladding body 20 is formed in a plate-shaped structure, any plate-shaped body thereon may be formed by stacking a plurality of sub-plate bodies, and the gap between the plurality of sub-plate bodies is the heat exchange cavity 202.

The heat exchange fluid refers to a flowable medium disposed in the heat exchange cavity 202, and it is understood that the specific heat capacity of the heat exchange fluid is greater than the overall specific heat capacity in the receiving cavity 201. In-service use, when obvious heat change (intensification or cooling) appears on battery 100 body, heat transfer fluid can absorb the heat of release on the naked electric core 10 or supply the heat to naked electric core 10, use the intensification as an example, naked electric core 10 is when charging, because resistance themogenesis, outside heat conduction heat dissipation, heat transfer fluid is after receiving the heat, because self specific heat capacity is great, can store more heat, continuously absorb the heat of naked electric core 10 release, make battery 100's bulk temperature remain stable, but along with going on of charging process, the temperature of naked electric core 10 continues to rise, make heat transfer fluid reach phase transition temperature, and take place the phase transition, become gaseous if by liquid evaporation, and along with heat transfer fluid's phase transition process, heat transfer fluid can absorb heat in a large number, further improve heat transfer fluid's heat absorbing capacity, make battery 100 maintain stably at the temperature of charging process.

On the one hand, through setting up cladding body 20, can provide cladding structure for naked electric core 10, make naked electric core 10 have relatively independent operational environment, and improve battery 100's mechanical strength, on the other hand, can effectively cool down naked electric core 10, be convenient for naked electric core 10 dispels the heat fast, and then increase the charging power that battery 100 can bear by a wide margin, it is long showing and shortening to make battery 100 charge, the third aspect, through setting up the heat transfer fluid that can hot phase transition, not only can the heat transfer medium in heat transfer chamber 202 be in the flow state, local overheated condition appears in the reduction, can also show the endotherm of strengthening the heat transfer fluid, improve the radiating effect to naked electric core 10, it is higher to reduce battery 100's charging power, the problem that the intensification phenomenon is just showing more.

Optionally, the specific shape of the coating 20 may be determined according to the shape of the bare electrical core 10, for example, the coating 20 may be a cylinder, a flat body, a rectangular parallelepiped, or another shape, which is not limited in the embodiment of the present application. Exemplarily, the coating 20 is matched with the bare cell 10, and a channel structure for leading out the tab on the bare cell 10 can be arranged thereon.

Alternatively, the heat exchange fluid may be a liquid metal such as gallium alloy, nano-thermal grease, or water. Illustratively, the heat transfer fluid may be selected in combination with the tolerance of cladding 20, such as mechanical strength, corrosion resistance, etc., and the heat transfer fluid may be water if cladding 20 is a steel shell.

Fig. 2 is a schematic diagram of the internal structure of battery 100 in other embodiments of the present application.

Optionally, battery 100 may include a plurality of bare cells 10 and a plurality of covers 20, and a plurality of covers 20 are disposed opposite to a plurality of bare cells 10. Exemplarily, referring to fig. 2, the battery 100 may include two bare cells 10 and two covers 20, and the two covers 20 are disposed in parallel after covering the two bare cells 10 respectively.

Fig. 3 is a schematic structural diagram of the battery 100 in some embodiments of the present application, and fig. 4 is a schematic structural diagram of the battery 100 in some embodiments of the present application.

As shown in fig. 1, 3 and 4, according to some embodiments of the present application, the cladding 20 comprises a first portion 203 and a second portion 204 which are oppositely arranged, and the heat exchange cavity 202 is arranged in at least one of the first portion 203 and the second portion 204.

The first portion 203 and the second portion 204 refer to two oppositely disposed portions of the cover 20, such as two oppositely disposed surfaces, or two oppositely disposed shells 206, wherein one shell 206 may be a cylindrical structure with an opening at one end, and the other shell 206 may be a plate-shaped structure, and can cover and seal the opening of the cylindrical structure.

Taking the square battery 100 as an example, optionally, the battery 100 may include three pairs of surfaces oppositely disposed along the length, width and height directions of the square, the first portion 203 and the second portion 204 may be one pair of surfaces oppositely disposed, for example, the first portion 203 and the second portion 204 may be one pair of three pairs of surfaces with the largest area, which enables the first portion 203 and the second portion 204 to have a larger area, so that the heat exchange cavity 202 has a larger volume, which facilitates increasing the filling amount of the heat exchange fluid, and also increases the relative area between the heat exchange cavity 202 and the bare cell 10, thereby improving the heat conduction efficiency, and further significantly improving the heat exchange effect.

Optionally, referring to fig. 3 and 4, according to some embodiments of the present application, the cover 20 includes a casing 206 and a cover plate 207, the first portion 203 is one of the casing 206 and the cover plate 207, the second portion 204 is the other of the casing 206 and the cover plate 207, the casing 206 is provided with a receiving cavity 201, the bare cell 10 is disposed in the receiving cavity 201, the cover plate 207 covers the casing 206 and seals the receiving cavity 201, and the heat exchange cavity 202 may be disposed in the casing 206 and/or the cover plate 207. Through setting up casing 206 and apron 207, on the one hand, can provide stable accommodation space for naked electric core 10, on the other hand can make cladding 20 resolvable for two parts relatively independent, reduces and sets up heat transfer chamber 202 back, cladding 20's the production degree of difficulty.

The case 206 is used to form a receiving space to receive the bare cell 10, an electrolyte (not shown in the figure), and other components. Illustratively, the housing 206 may be a cylindrical structure provided with an opening at one end, and the cover plate 207 may cover and seal the opening. It is understood that the housing 206 may have various structural forms, such as a rectangular parallelepiped, a cylinder, etc., and the specific shape of the housing 206 may be determined according to the specific shape of the bare cell 10. It is understood that the housing 206 may be made of various materials, such as stainless steel, aluminum alloy, etc.

Alternatively, the shell 206 may have a two-layer structure, and the inner layer and the outer layer are connected at the opening of the shell 206, and the interlayer between the inner layer and the outer layer is the heat exchange cavity 202.

Alternatively, the cover plate 207 may be a double-layer structure connected to each other at the edges, and the interlayer therebetween is the heat exchange cavity 202.

For example, in the electronic device, the cover plate 207 may be disposed near a side of the display screen, and in the electronic device, the side of the display screen has high structural strength, and the foregoing arrangement can improve the use safety of the electronic device.

As shown in fig. 1, according to some embodiments of the present application, the cladding 20 further comprises a third portion 205, the third portion 205 being at least one side surface connecting the first portion 203 and the second portion 204, the heat exchange cavity 202 being arranged in the first portion 203 and extending into the second portion 204 through the third portion 205.

The first portion 203 and the second portion 204 refer to the portions of the envelope 20 connecting the first portion 203 and the second portion 204, as can be the side surfaces provided between the first portion 203 and the second portion 204.

Taking the prismatic battery 100 as an example, the third portion 205 may alternatively be any one or more surfaces between a pair of surfaces having the largest area. Illustratively, heat exchange chambers 202 of first portion 203 and second portion 204 communicate via heat exchange chamber 202 in third portion 205,

through extending heat transfer cavity 202 from first portion 203 to second portion 204, can make the both sides of naked electric core 10 all have heat transfer cavity 202, be convenient for maintain the homogeneous of temperature everywhere on naked electric core 10, reduce the risk of local overheat or subcooling, simultaneously because in electronic equipment, the volume of battery 100 accounts for than generally great, all set up heat transfer cavity 202 in the both sides of battery 100, also be convenient for form complete heat conduction route in electronic equipment inside, integrate battery 100's heat dissipation route to electronic equipment in, improve the holistic heat transfer effect of electronic equipment.

Fig. 5 is a schematic structural view of a battery 100 according to still another embodiment of the present application, fig. 6 is a schematic internal structural view of the battery 100 according to still another embodiment of the present application, and fig. 7 is an enlarged schematic view of a portion a of fig. 6.

As shown in fig. 1, fig. 3, fig. 5 to fig. 7, according to some embodiments of the present application, the bare cell 10 includes a tab 101, the third portion 205 includes a leading-out end surface facing the tab 101, the heat exchange cavity 202 is disposed in the leading-out end surface, a tab leading-out hole 30 communicating the accommodating cavity 201 and the outside of the coating body 20 is disposed on the leading-out end surface, the tab leading-out hole 30 is separated from the heat exchange cavity 202, and the tab 101 is led out from the coating body 20 through the tab leading-out hole 30.

The tab 101 refers to an area of the tab, on which no active material is coated, for connecting an external circuit with the bare cell 10 to form a complete circuit.

The lead-out end surface refers to a region of the third portion 205 corresponding to the tab 101, and may be used to provide a structure for leading out the tab to the outside of the battery 100, so as to shorten a path for leading out the tab 101 from the inside of the battery 100 to the outside of the battery 100.

The arrangement of the tab leading-out hole 30 and the heat exchange cavity 202 in a separated manner means that the tab leading-out hole 30 is not communicated with heat exchange.

On the one hand, through setting up heat transfer chamber 202 at the guide terminal surface, can compensate the heat transfer breach that naked electric core 10 utmost point ear 101 draw forth one side, improve the holistic heat transfer effect of battery 100, on the other hand draws forth hole 30 through setting up utmost point ear, can be convenient for draw forth utmost point ear 101 from acceping in the chamber 201.

Referring to fig. 7, alternatively, the tab leading-out hole 30 may include a hole 302 and a duct 301, the hole 302 is connected to a sidewall enclosing to form the heat exchanging cavity 202, the duct 301 is disposed in the hole 302, one end of the duct is disposed outside the cladding body 20, and the other end of the duct is disposed on a side facing the receiving cavity 201.

It can be understood that the number of the tab lead-out holes 30 is matched with the number of the tabs 101, and if the tabs 101 are usually provided in two, the tab lead-out holes 30 may also be provided in two, and the two tab lead-out holes 30 correspond to the two tabs 101.

As shown in fig. 5 to 7, according to some embodiments of the present application, the cladding 20 includes a first shell 208 and a second shell 209 which are stacked, the first shell 208 and the second shell 209 enclose a heat exchange cavity 202, the first shell 208 is provided with an injection hole 40, and the injection hole 40 is communicated with the heat exchange cavity 202.

Taking the first housing 208 to form the accommodating cavity 201 as an example, the stacked first housing 208 and second housing 209 means that the second housing 209 wraps around the first housing 208, and a gap between the first housing 208 and the second housing 209 is the heat exchange cavity 202. The injection hole 40 refers to a through hole structure penetrating through the second housing 209 along the thickness direction of the second housing 209, and in use, the injection hole 40 can be used for supplying or extracting heat exchange fluid into or from the heat exchange cavity 202, and can also be used for supplying or extracting gas into or from the heat exchange cavity 202 to control the pressure in the heat exchange cavity 202.

It is understood that a support structure may be further disposed between the first housing 208 and the second housing 209, and the support structure is used for supporting the relative position between the first housing 208 and the second housing 209.

Optionally, the duct 301 in the tab leading-out hole 30 penetrates through the first housing 208 and the second housing 209 to achieve communication between the accommodating cavity 201 and the exterior of the cover 20, two ends of the duct 302 enclosing to form the duct 301 may be respectively connected with the first housing 208 and the second housing 209, and meanwhile, the duct 301 may serve as a support structure between the first housing 208 and the second housing 209.

Exemplarily, the first shell 208 is used for wrapping the bare cell 10, the second shell 209 is wrapped on the first shell 208, a certain gap exists between the first shell 208 and the second shell 209, that is, the heat exchange cavity 202 is formed, and the first shell 208 and the second shell 209 are connected through the hole body 302.

Through setting up first casing 208 and second casing 209, can form the heat transfer chamber 202 of parcel in naked electric core 10 week side, make the heat transfer fluid can freely remove in week side of battery 100, in the actual charging process, the subassembly that heaies up among the electronic equipment is not only battery 100, still can include electronic equipment's CPU (central processing unit), and the charging process, the intensification condition of battery 100 week side can lead to the fact complicated influence to heat transfer chamber 202, at this moment, the heat transfer fluid of circulating in each wall week side of battery 100 can be make full use of, heat everywhere on balanced battery 100, participate in the holistic heat conduction route of electronic equipment even, improve the holistic heat conduction efficiency of electronic equipment.

FIG. 8 is a block diagram of a temperature control system according to some embodiments of the present application.

As shown in fig. 8, according to some embodiments of the present application, the battery 100 further includes a vacuum pump 140, and the vacuum pump 140 is connected to the injection hole 40 for adjusting the vacuum degree in the heat exchange chamber 202 and controlling the phase change temperature of the heat exchange fluid in the heat exchange chamber 202.

Through setting up vacuum pump 140, can change the vacuum in heat transfer chamber 202, and then change heat transfer fluid's phase transition temperature, make heat transfer fluid's phase transition temperature more laminate charging process, if reduce heat transfer fluid's phase transition temperature to the temperature that the naked electric core 10 can reach in the charging process, make full use of heat transfer fluid's gasification latent heat.

Alternatively, the vacuum pump 140 may be integrated into the battery 100 by using a micro vacuum pump, or may be provided separately from the battery 100, for example, referring to the design of the charging head, when it is necessary to change the vacuum degree in the heat exchange cavity 202, the vacuum pump 140 is connected to the injection hole 40.

As shown in fig. 8, according to some embodiments of the present application, the battery 100 further includes a temperature control system, the temperature control system includes a vacuum gauge 120, a temperature gauge 130, and a control circuit 110, the vacuum gauge 120 is used for measuring a vacuum degree in the heat exchange cavity 202, the temperature gauge 130 is used for measuring a temperature of the battery 100, and the control circuit 110 is used for controlling the vacuum pump 140 to adjust the vacuum degree in the heat exchange cavity 202 according to the temperature of the battery 100, so as to adjust a phase change temperature of the heat exchange fluid in the heat exchange cavity 202.

Optionally, a plurality of heat dissipation modes may be recorded in the control circuit 110, and the control circuit 110 may control the vacuum pump 140 to operate according to the selected heat dissipation mode, so as to adjust the heat exchange fluid to the corresponding phase transition temperature, so that the battery 100 performs heat dissipation in the corresponding mode.

For example, the heat dissipation mode may include timing heat dissipation, that is, heat dissipation is performed on the battery 100 at a specific time, taking a charging process as an example, for example, heat dissipation may be set 10 minutes after charging starts, when a corresponding time is reached, the control circuit 110 obtains a current temperature value of the battery 100, determines a pressure value required by the heat exchange fluid for phase change at the current temperature of the battery 100 according to the current temperature value of the battery 100, a specific heat capacity of the heat exchange fluid, and the like, and then adjusts the pressure in the heat exchange cavity 202 to the pressure value by controlling the vacuum pump 140, so as to achieve rapid heat dissipation on the battery 100 by using latent heat of vaporization.

For example, the heat dissipation mode may include constant temperature heat dissipation, that is, heat dissipation is performed on the battery 100 at a specific temperature, for example, heat dissipation is performed when the temperature of the battery 100 reaches 40 ℃, since the heat dissipation temperature is known, a pressure value required for phase change of the heat exchange fluid at the heat dissipation temperature may be determined according to a specific heat capacity of the heat exchange fluid, and when the corresponding temperature is reached, the control circuit 110 controls the vacuum pump 140 to adjust the pressure in the heat exchange cavity 202 to the pressure value, so as to achieve rapid heat dissipation on the battery 100 by using the latent heat of vaporization value.

Fig. 9 is a flow chart illustrating a method for determining parameters of battery 100 according to some embodiments of the present disclosure.

As shown in fig. 9, according to some embodiments of the present application, there is provided a parameter determination method of a battery 100, for use in any one of the above batteries 100, the method including:

s101, obtaining heat generated when the battery 100 is charged according to the charging current and the charging impedance;

s102, obtaining mass parameters of the heat exchange fluid in the heat exchange cavity 202 according to the heat, the specific heat capacity of the heat exchange fluid, a preset temperature value and the vaporization latent heat value of the heat exchange fluid;

s103, obtaining the vaporization expansion volume of the heat exchange fluid in the heat exchange cavity 202 according to the preset air pressure value, the preset mass parameter and the preset temperature value of the battery 100;

and S104, obtaining the gap value of the heat exchange cavity 202 and the thickness of the cladding body 20 according to the vaporization expansion volume.

Through S101, the heat generated by charging of the battery 100 can be obtained, the heat generated by charging is carried into S102, the specific mass of the heat exchange cavity 202 using the heat exchange fluid can be obtained, then through S103, the vaporization expansion volume can be obtained, and finally through S104, the gap value of the heat exchange cavity 202 and the thickness of the cladding body 20 can be calculated, so that the design of the heat exchange cavity 202 is more fit for the actual heat dissipation work, and the volume of the battery 100 is fully utilized.

In practice, the battery 100 has known properties, and Q = I can be obtained by an electrothermal conversion formula ² Rt, I is charging current, R is charging impedance, calculating heat Q generated when the battery 100 is charged within unit charging time T, and setting phase-change temperature of the heat-exchange fluid according to node temperature of the battery 100 requiring significant heat dissipation effect, wherein Q = cm (T1-T2) by a thermodynamic formula, c is specific heat capacity of the heat-exchange fluid, m is mass of the heat-exchange fluid, T1 is phase-change temperature, T2 is initial temperature of the heat-exchange fluid, and if the temperature is normal temperature (which may be 25 ℃), a suitable specific heat capacity range is obtained, so that selection of the heat-exchange fluid is convenient to determine.

In S101, the charging impedance may be directly obtained according to the signal of the battery 100, the charging current may be directly obtained according to the charging specification or obtained by measurement in the actual charging process, and after the charging current and the charging impedance are obtained, the heat generated when the battery 100 is charged may be obtained by calculation through a thermodynamic formula.

In S102, the specific heat capacity, the preset temperature value, and the latent heat of vaporization of the heat exchange fluid are physicochemical properties of the heat exchange fluid itself, and can be directly obtained according to the selection of the heat exchange fluid, for example, when the heat exchange fluid is water, the specific heat capacity, the preset temperature value, and the latent heat of vaporization can be directly obtained through the physicochemical properties of water, and the latent heat of vaporization can be a set of latent heats of vaporization of water under different pressure conditions.

In S103, the preset temperature value refers to a temperature of the heat exchange fluid when the phase change occurs, and the preset air pressure value refers to a pressure value in the heat exchange cavity 202 corresponding to the preset temperature value. Illustratively, S103 may be calculated from PV = nRT, where V vaporizes the expansion volume, P is a preset pressure value, n is a mass parameter, T is a preset temperature value, and R is an ideal gas constant. Through the calculation process, on the premise that the mass parameter and the ideal gas constant R of the heat exchange fluid are certain and the phase change temperature range is known, the volume of the heat exchange fluid and the pressure value in the heat exchange cavity 202 can be reasonably regulated, and the heat exchange cavity 202 has high use safety while the heat exchange fluid has high heat exchange effect.

In S104, the volume of the heat exchange cavity 202 can be obtained according to the vaporization expansion volume, for example, the vaporization expansion volume can be directly equal to the volume of the heat exchange cavity 202, and further, the specific gap of the heat exchange cavity 202 can be obtained according to the size of the battery 100, and after the gap of the heat exchange cavity 202 is determined, the thickness of the clad body 20 can be obtained according to the related strength requirement.

It will be understood that the above method can be substituted according to the choice of materials for cladding 20 and for the heat exchange fluid, to obtain a corresponding value of the clearance of heat exchange chamber 202 and the thickness of cladding 20.

Illustratively, the specific material properties of the clad 20, such as tensile strength, breaking strength, etc., can significantly enhance the mechanical strength of the resulting clad 20, thereby achieving a reduction in the thickness of the clad 20 and providing spatial support for the arrangement of the heat exchange cavity 202.

Illustratively, since the size of the battery 100 in the thickness direction thereof is greatly limited by the size of the electronic device, it is also considered that the arrangement position of the heat exchange cavity 202 is moved to the end of the battery 100 in the length direction, for example, a plurality of heat exchange cavities 202 are arranged in a stacked manner at the end of the battery 100 in the length direction, so as to reduce the thickness of the battery 100, and thus the thickness of the electronic device.

According to some embodiments of the present application, there is provided an electronic device including any one of the batteries 100 described above.

Fig. 10 is a schematic diagram of a structure at a battery 100 in an electronic device according to some embodiments of the present application.

As shown in fig. 10, according to some embodiments of the present application, the electronic apparatus further includes a graphite sheet 300 provided at one side of the battery 100 and a soaking plate 200 provided at the other side of the battery 100;

the cover 20 comprises a first part 203, a second part 204 and a third part 205 which are connected, and the first part 203, the second part 204 and the third part 205 enclose to form a containing cavity 201;

the first portion 203 and the second portion 204 are located on two opposite sides of the battery 100, the third portion 205 connects the first portion 203 and the second portion 204, the heat exchange cavity 202 is provided in the first portion 203, and the heat exchange cavity 202 extends from the first portion 203 to the second portion 204 through the third portion 205; the first portion 203 is located between the graphite sheet 300 and the bare cell 10, and the second portion 204 is located between the bare cell 10 and the soaking plate 200.

The soaking plate 200 refers to a heat dissipating member of the whole electronic device, such as a heat dissipating component VC of a CPU.

The graphite sheet 300 refers to a heat dissipation component of the electronic device, such as a heat dissipation graphite sheet 300PSG.

When charging, the heat circulation in the electronic equipment can be conducted to graphite flake 300 through heat transfer chamber 202 by naked electric core 10, transmit to the electronic equipment outside by graphite flake 300 again, still can transmit to vapor chamber 200 through heat transfer chamber 202 by naked electric core 10, transmit to the electronic equipment outside along electronic equipment's complete machine heat dissipation path by vapor chamber 200 again, can improve the heat absorption capacity in the electronic equipment, and the inside heat-conduction structure of make full use of electronic equipment, promote the inside heat balance of electronic equipment.

Fig. 11 is a schematic diagram of a structure at a battery 100 in an electronic device according to another embodiment of the present application.

Referring to fig. 11, the electronic apparatus may further include a main board heat generating member 400, a portion of the soaking plate 200 corresponding to the main board heat generating member 400 and the other portion corresponding to the battery 100, a graphite sheet 300 disposed on a side of the battery 100 away from the soaking plate 200, the graphite sheet 300 corresponding to the battery 100 in a portion and the main board heat generating member 400 in another portion.

The motherboard heating element 400 is a heating component on a motherboard of the electronic device, and for example, the motherboard heating element 400 may be a CPU.

When charging, the heat cycle in the electronic equipment, can be for passing through heat transfer chamber 202 by naked electric core 10 and transmitting to graphite flake 300, transmit to the electronic equipment outside by graphite flake 300 again, still can pass through heat transfer chamber 202 by naked electric core 10 and transmit to vapor chamber 200, transmit to mainboard by vapor chamber 200 again and generate heat piece 400, generate heat piece 400 again by the mainboard and pass through graphite flake 300 and transmit to the electronic equipment outside, can improve the heat absorption capacity in the electronic equipment, and make full use of the inside heat-conduction structure of electronic equipment, and because the heat transfer fluid in the heat transfer chamber 202 is flowable, battery 100 can act as the core structure of heat transfer route in the electron setting, promote electronic equipment to realize heat balance.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, comprising:

a naked battery cell;

the cladding body surrounds to form an accommodating cavity for accommodating the naked battery cell;

still be equipped with the heat transfer chamber in the cladding body, the heat transfer chamber with accept the chamber and separate the setting, the heat transfer intracavity is filled and is had the heat transfer fluid, be used for with naked electric core heat exchange, the heat transfer fluid is hot phase change material.

2. The battery of claim 1, wherein the cladding includes first and second oppositely disposed portions, the heat exchange cavity being disposed within at least one of the first and second portions.

3. The battery of claim 2, wherein the enclosure further comprises a third portion being at least one side surface connecting the first portion and the second portion, the heat exchange cavity being disposed in the first portion and extending into the second portion through the third portion.

4. The battery of claim 3, wherein the bare cell includes a tab, the third portion includes an extraction end surface facing the tab, the heat exchange cavity is disposed in the extraction end surface, the extraction end surface is provided with a tab extraction hole communicating the accommodation cavity and the outside of the clad body, the tab extraction hole is separated from the heat exchange cavity, and the tab is extracted from the clad body through the tab extraction hole.

5. The battery according to claim 1, wherein the sheathing body comprises a first shell and a second shell which are stacked, the first shell and the second shell enclose the heat exchange cavity, and an injection hole is formed in the first shell and communicated with the heat exchange cavity.

6. The battery of claim 5, further comprising a vacuum pump connected to the injection hole for adjusting a vacuum level in the heat exchange chamber and controlling a phase transition temperature of the heat exchange fluid in the heat exchange chamber.

7. The battery of claim 6, further comprising a temperature control system, wherein the temperature control system comprises a vacuum gauge, a thermometer and a control circuit, the vacuum gauge is used for measuring the vacuum degree in the heat exchange cavity, the thermometer is used for measuring the temperature of the battery, and the control circuit is used for controlling the vacuum pump to adjust the vacuum degree in the heat exchange cavity according to the temperature of the battery so as to adjust the phase change temperature of the heat exchange fluid in the heat exchange cavity.

8. A method for determining parameters of a battery, for use in a battery according to any of claims 1-7, the method comprising:

obtaining the quality parameters of the heat exchange fluid in the heat exchange cavity according to the heat, the specific heat capacity of the heat exchange fluid, a preset temperature value and the latent heat value of vaporization of the heat exchange fluid;

9. An electronic device comprising the battery according to any one of claims 1 to 7.

10. The electronic device according to claim 9, further comprising a graphite sheet provided on one side of the battery and a heat spreader provided on the other side of the battery;

the cladding body comprises a first part, a second part and a third part which are connected, and the first part, the second part and the third part are enclosed to form the accommodating cavity;

the first part and the second part are positioned at two opposite sides of the battery, the third part is connected with the first part and the second part, the heat exchange cavity is arranged at the first part, and the heat exchange cavity extends from the first part to the second part through the third part; the first part is located between the graphite sheet and the naked electric core, and the second part is located between the naked electric core and the soaking plate.