CN214672686U

CN214672686U - Heatable battery and electronic device

Info

Publication number: CN214672686U
Application number: CN202120994451.7U
Authority: CN
Inventors: 胡昱; 邹康; 李超鹏
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-11-09
Anticipated expiration: 2031-05-11

Abstract

The application discloses heatable battery and electronic equipment, electronic equipment includes heatable battery. The heatable battery includes a battery body, a protection unit, an electric heating unit, and a heat insulator. The protection unit is electrically connected to the battery body. The electric heating unit is formed on the surface of the battery body and is electrically connected to the protection unit. The heat insulation piece is arranged on at least part of the surface of the electric heating unit and used for preventing heat generated by the electric heating unit from being dissipated outside the battery body. The heatable battery is formed on the surface of the battery body through the electric heating unit, so that the temperature of the battery is safely and effectively controlled, and the loss of heat between the electric heating unit and the battery body in the transfer process is reduced; the loss of heat dissipated out of the battery body is reduced through the heat insulation piece; simple structure is reliable, practices thrift the cost.

Description

Heatable battery and electronic device

Technical Field

The application relates to the technical field of new energy batteries, in particular to a heatable battery and an electronic device.

Background

In recent years, lithium batteries are increasingly widely used, and the service performance of the lithium batteries is getting a key focus of battery manufacturers and consumer users. The charging efficiency and the service life of the lithium battery are influenced by a plurality of factors, wherein the temperature is one of the obvious influencing factors, when the battery is in a low-temperature environment, the heat conversion efficiency and the power characteristic of the battery can be seriously reduced, the electrochemical reaction of the battery is easy to be abnormal, and even the safety problems of lithium precipitation and the like can occur. Therefore, it is necessary to control the temperature of the battery to ensure the normal use of the battery.

At present, two common battery heating forms are provided, one is a polyimide film heating sheet attached to the outside of the battery, and the external heating film can effectively improve the temperature of the battery. However, due to the external heating sheet, the heating sheet and the battery cannot be completely attached to each other, and the middle of the heating sheet is easy to warp or has a gap, so that the heat transfer efficiency is reduced in the heating process, the heating time cannot reach the fastest speed, and meanwhile, certain loss of heat is generated. The second is a heating method with built-in heating, which releases a large amount of heat in a short time by generating an internal short circuit inside the battery, but the internal heating is easy to trigger the safety problem of the lithium battery in the short-circuit process, and the internal heating has a complex design and is relatively high in cost.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a heatable battery and an electronic device for temperature control of the battery with safety, efficiency and low cost.

Embodiments of the present application provide a heatable battery, including battery body, protection unit, electric heat power supply and heat insulating part. The protection unit is electrically connected to the battery body. The electric heating unit is formed on the surface of the battery body and is electrically connected to the protection unit. The heat insulation piece is arranged on at least part of the surface of the electric heating unit and used for preventing heat generated by the electric heating unit from being dissipated outside the battery body.

The heatable battery is formed on the surface of the battery body through the electric heating unit, so that the temperature of the battery is safely and effectively controlled, and the loss of heat between the electric heating unit and the battery body in the transfer process is reduced; the loss of heat dissipated out of the battery body is reduced through the heat insulation piece; simple structure is reliable, practices thrift the cost.

In some embodiments of the present application, the thermoelectric element is formed on the surface of the battery body by means of piezo-electric spraying or printing.

In some embodiments of the present application, the electric heating unit includes a resistive circuit.

The electric heating unit can heat the battery body by electrifying to rise the temperature.

In some embodiments of the present application, the thermal insulation member includes a first wrapping film and a second wrapping film. The first wrapping film avoids the electric heating unit to be attached to the surface of the battery body. The second wrapping film covers at least part of the surface of the electric heating unit and is fixed on the battery body.

In some embodiments of the present application, the electric heating unit is disposed between the second wrapping film and the battery body.

The electric heating unit is directly attached to the battery body, so that the loss of heat between the electric heating unit and the battery body in the transfer process can be effectively reduced.

In some embodiments of the present application, the first and second wrapping films are integrally formed.

In some embodiments of the present application, the battery body includes a packaging bag and an electrode assembly housed in the packaging bag, the electrode assembly being electrically connected to the protection unit.

In some embodiments of the present application, the electric heating unit is serpentine-disposed on the surface of the battery body.

The electric heating unit is arranged in a winding manner, so that the contact area between the electric heating unit and the battery body can be increased, and the heat transfer efficiency between the electric heating unit and the battery body is improved.

Embodiments of the present application also provide an electronic device comprising a housing and a heatable battery as described above, the heatable battery being mounted within the housing.

Drawings

Fig. 1 is a schematic view of the structure of a battery in a first embodiment of the present application.

Fig. 2 is a sectional view a-a of a battery in a first embodiment of the present application.

Fig. 3 is a sectional view a-a of a battery in a second embodiment of the present application.

Fig. 4 is a sectional view a-a of a battery in a third embodiment of the present application.

Description of the main elements

Heatable battery 100

Battery body 1

Packaging bag 11

Electrode assembly 12

Protection unit 2

Electric heating unit 3

First connection unit 31

Second connection unit 32

Electric heating material 33

Heat insulation 4

First wrapping film 41

Second wrapping film 42

Positive electrode tab 51

Negative pole tab 52

Mylar 6

First flexible circuit board 71

Second flexible circuit board 72

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Embodiments of the present application provide a heatable battery, an electronic device comprising a heatable battery. The heatable battery includes a battery body, a protection unit, an electric heating power source, and a heat insulating member. The protection unit is electrically connected to the battery body. The electric heating unit is formed on the surface of the battery body and is electrically connected to the protection unit. The heat insulation piece is arranged on at least part of the surface of the electric heating unit and used for preventing heat generated by the electric heating unit from being dissipated outside the battery body.

Embodiments of the present application also provide an electronic device including a housing and a heatable battery mounted within the housing to provide electrical energy to the electronic device.

In some embodiments, the electronic device may be an electronic product such as a mobile phone, a tablet computer, or a notebook computer.

Embodiments of the present application will be further described with reference to the accompanying drawings.

As shown in fig. 1, a first embodiment of the present application provides a heatable battery 100 including a battery body 1, a protection unit 2, an electric heating unit 3, a heat insulator 4, a positive electrode tab 51, a negative electrode tab 52, and mylar 6. The battery body 1 comprises a battery core, and the battery core is arranged inside the battery body 1.

The protection unit 2 is arranged at the head of the battery body 1, is electrically connected with the battery cell and is used for breaking the battery when the battery is overcharged, overdischarged, overcurrent, short circuit or ultrahigh temperature occurs so as to protect the safety of the battery cell in the battery body 1.

In some embodiments, the protection unit 2 is a protection circuit board disposed at the head of the battery body 1.

A positive electrode tab 51 and a negative electrode tab 52 are provided on the head of the battery body 1, and are electrically connected to the battery cell and the protection unit 2, respectively and independently.

In some embodiments, the positive tab 51 and the negative tab 52 are metal pieces. Further, the positive electrode tab 51 may be made of aluminum, and the negative electrode tab 52 may be made of nickel or copper-plated nickel.

The Mylar 6 is wrapped at the tail part of the battery body 1 and used for protecting the battery body 1.

Mylar 6 is an insulating material. In some embodiments, the material of mylar 6 includes, but is not limited to, any of Polycarbonate (PC) and polyethylene terephthalate (PET).

The electric heating unit 3 is formed on the surface of the battery body 1 and electrically connected to the protection unit 2. The electric heating unit 3 includes a first connection unit 31, a second connection unit 32, and an electric heating material 33, and the electric heating material 33 is formed on the surface of the battery body 1. The first connection unit 31 and the second connection unit 32 are respectively connected to both ends of the electric heating material 33, and are both electrically connected to the protection unit 2.

When the first connection unit 31 and the second connection unit 32 are electrically connected to the battery cell through the protection unit 2, and current flows through the electric heating material 33, the electric heating material 33 can release heat to control the temperature of the battery body 1. Further, by increasing the magnitude of the passing current, the heat release can be accelerated, so that the temperature of the battery body 1 can be rapidly raised.

In some embodiments, the first connection unit 31 and the second connection unit 32 may be metal pieces.

In some embodiments, electrocaloric material 33 includes resistive wires.

In some embodiments, the electrocaloric material 33 may be a metallic piece. Further, the electrocaloric material 33 includes, but is not limited to, any one of noble metals, refractory metals and alloys thereof, nickel-based alloys, and iron-aluminum based alloys.

In some embodiments, the electrocaloric material 33 may be formed on the surface of the battery body 1 by piezo-electric spraying or printing. When the electric heating material 33 is formed on the surface of the battery body 1 by means of piezoelectric spraying, the spraying shape of the electric heating material 33 can be arbitrarily adjusted to be suitable for batteries of different shapes.

In some embodiments, the electric heating material 33 may be formed on the surface of the battery body 1 in a serpentine shape while ensuring safety, and it is understood that the serpentine electric heating material 33 may extend the length of the current path to increase the heat generation area.

In some embodiments, the heatable battery 100 further includes a first flexible circuit board 71 and a second flexible circuit board 72, the first flexible circuit board 71 and the second flexible circuit board 72 being disposed at the head of the battery body 1. The first flexible circuit board 71 electrically connects the first connection unit 31 and the protection unit 2, and the second flexible circuit board 72 electrically connects the second connection unit 32 and the protection unit 2. It is understood that the first flexible circuit board 71 connecting the first connection unit 31 and the protection unit 2 may improve the connection reliability of the first connection unit 31 and the protection unit 2, and the second flexible circuit board 72 connecting the second connection unit 32 and the protection unit 2 may improve the connection reliability of the second connection unit 32 and the protection unit 2.

The heat insulator 4 is disposed on the surface of the battery body 1 and/or the electric heating material 33, and not only can protect the battery body, but also can reduce heat loss.

The heat insulating material 4 includes a first wrapping film 41 and a second wrapping film 42, and the first wrapping film 41 and the second wrapping film 42 are attached to the surface of the battery body 1 to protect the battery body 1. Further, the first wrapping film 41 is attached to the surface of the battery body 1 so as to avoid the electric heating element 33, and the second wrapping film 42 is fixed to the battery body 1 so as to cover at least a part of the surface of the electric heating element 33. The second wrapping film 42 covers the electric heating material 33, which can help the heat generated by the electric heating material 33 to be transferred to the battery body 1, reduce the loss of heat, and can also cover the part of the surface of the battery body 1 which is not covered by the first wrapping film 41 to play a role in protection.

In some embodiments, the material of the first wrapping film 41 may be polyamide fiber, polyethylene, polypropylene. The material of the second wrapping film 42 includes, but is not limited to, any of polyamide fiber, polyethylene, polypropylene, etc.

In some embodiments, the second wrapping film 42 may be gummed paper or glue. When the second wrapping film 42 is a gummed paper, the gummed paper is directly stuck to the surface of the battery body 1 and the electric heating material 33 is covered. When the second wrapping film 42 is used as glue, the glue is coated on the surface of the electric heating material 33 and the electric heating material 33 is fixed on the battery body 1. It is understood that the similar technical effects as the present application can be achieved by covering and fixing the electric heating material 33 on the battery body 1 with gummed paper, glue or other materials instead of the second wrapping film 42, and these changes made according to the present application are all included in the scope disclosed in the present application.

As shown in fig. 2, the electric heating material 33 is formed on the surface of the battery body 1 by a piezo jet method and is bonded to the surface of the battery body 1. The second wrapping film 42 is attached to the surface of the battery body 1 and covers the electric heating material 33. The first wrapping film 41 is attached to the surface of the battery body 1 while avoiding the second wrapping film 42. Under the wrapping of the first wrapping film 41 and the second wrapping film 42, the battery body is protected and insulated.

When current passes through the electric heating material 33, most of the heat generated by the electric heating material 33 is transferred to the battery body 1 under the action of the second wrapping film 42, so that the temperature of the battery body 1 is increased, and excessive heat loss is avoided.

As shown in fig. 3, in the second embodiment of the present application, the first wrapping film 41 and the second wrapping film 42 may be of an integrally molded structure. Further, the electric heating material 33 is formed on the surface of the battery body 1 by a piezo jet method and is attached to the surface of the battery body 1. The heat insulator 4 is bonded to the surface of the battery body 1, covers the portion of the electric heating material 33 not bonded to the surface of the battery body 1, and fixes the electric heating material 33 to the surface of the battery body 1.

When current flows through the electric heating material 33, most of the heat generated by the electric heating material 33 is transferred to the battery body 1 under the action of the heat insulation member 4, so that the temperature of the battery body 1 is increased, and excessive heat loss is avoided.

As shown in fig. 4, in the third embodiment of the present application, the battery body 1 includes a packaging bag 11 and an electrode assembly 12, and the electrode assembly 12 is disposed in a sealed space formed in the packaging bag 11. A cathode tab 51 and an anode tab 52 are attached to the electrode assembly 12 and protrude from the packaging bag 11.

The electric heating material 33 is formed in the interlayer of the packing bag 11, that is, the packing bag 11 completely covers the electric heating material 33. At this time, the second wrapping film 42 may be attached to the surface of the region of the packaging bag 11 where the electric heating elements 33 are provided, and the first wrapping film 41 may be attached to the surface of the packaging bag 11 while avoiding the second wrapping film 42. It will be appreciated that the first and

second wrapping films

41, 42 may also be of one-piece construction, i.e. the insulation 4 is applied to the surface of the package 11.

When current flows through the electric heating material 33, most of the heat generated by the electric heating material 33 is transferred to the electrode assembly 12 by the heat insulation member 4, so that the temperature of the electrode assembly 12 is increased, and excessive heat dissipation is avoided.

In some embodiments, the package 11 is an aluminum plastic film.

The heatable battery 100 is formed on the surface of the battery body 1 through the electric heating unit 3, so that the temperature of the battery is safely and effectively controlled, and the loss of heat between the electric heating unit 3 and the battery body 1 in the transfer process is reduced; the loss of heat dissipation out of the battery body 1 is reduced by the heat insulating member 4; simple structure is reliable, practices thrift the cost.

In addition, other changes may be made by those skilled in the art within the spirit of the present application, and it is understood that such changes are encompassed within the scope of the present disclosure.

Claims

1. A heatable battery comprising a battery body and a protection unit electrically connected to the battery body, characterized in that the heatable battery further comprises:

the electric heating unit is arranged on the surface of the battery body and is electrically connected to the protection unit;

the heat insulation piece is arranged on at least part of the surface of the electric heating unit and used for blocking heat generated by the electric heating unit from being dissipated.

2. The heatable battery of claim 1, wherein the electrical heating element is formed on the surface of the battery body by means of piezo-electric spraying or printing.

3. The heatable battery of claim 1, wherein the electrical heating unit comprises a resistive circuit.

4. The heatable battery of claim 1, the thermal shield comprising:

the first wrapping film avoids the electric heating unit and is attached to the surface of the battery body;

and the second wrapping film covers at least part of the surface of the electric heating unit and is fixed on the battery body.

5. The heatable battery of claim 4, wherein the electric heating unit is disposed between the second wrapping film and the battery body.

6. The heatable battery of claim 5, the first and second wrapping films being integrally formed.

7. The heatable battery of claim 1, wherein the battery body includes a packaging bag and an electrode assembly housed within the packaging bag, the electrode assembly being electrically connected to the protective unit;

the packaging bag completely covers the electric heating unit.

8. The heatable battery of claim 1, wherein the electrical heating element is serpentine disposed on the surface of the battery body.

9. An electronic device comprising a housing, further comprising a heatable battery as claimed in any one of claims 1 to 8, the heatable battery being mounted within the housing.