Variable-temperature battery and electronic equipment

Abstract

The utility model discloses a variable-temperature battery and electronic equipment, and belongs to the technical field of electronic equipment. Comprising a temperature changing structure and a battery cell which are in contact with each other, the battery cell comprises a first surface and a second surface which are oppositely arranged; the temperature change structure comprises a heating piece, a cooling piece and a phase change layer; the heating piece makes contact with the first face, and the cooling piece is arranged on the second face. The phase change layer is arranged between the cooling piece and the battery cell, and the phase change layer is in contact with the second surface and the cooling piece. In the embodiment of the utility model, by arranging the phase change layer, compared with the prior art that passive adjustment of the temperature of the battery cell is converted into active temperature change of the variable-temperature battery to adjust the temperature of the battery cell, the variable-temperature battery has the beneficial effect of improving the working stability of the variable-temperature battery.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electronic equipment, specifically relates to a variable temperature battery and electronic equipment. BACKGROUND

[0002] The battery will enter a state of being unable to discharge in an environment of extremely low temperature below -20 DEG C, thereby affecting normal use of the electronic equipment.

[0003] In the prior art, the battery is heated by attaching graphene in a high-temperature environment and by adding an electric heating wire in a low-temperature environment, so that the electronic equipment can work normally.

[0004] However, the above-mentioned battery temperature control is performed in a passive manner, and the thermal management stability of the battery is poor. UTILITY MODEL CONTENTS

[0005] The utility model embodiment aims to provide a variable temperature battery and electronic equipment, which can solve the problem of passive variable temperature and poor stability of the variable temperature battery in the prior art.

[0006] To solve the above technical problems, the utility model is implemented as follows:

[0007] In a first aspect, the utility model embodiment provides a variable temperature battery, which comprises a variable temperature structure and a battery cell, the variable temperature structure and the battery cell are in contact, the battery cell comprises a first surface and a second surface arranged oppositely, the variable temperature structure comprises a heating piece, a cooling piece and a phase change layer, the heating piece is in contact with the first surface, the cooling piece is arranged on the second surface, the phase change layer is arranged between the cooling piece and the battery cell, and the phase change layer is in contact with the second surface and the cooling piece.

[0008] In the utility model embodiment, during use of the variable temperature battery, the temperature change in the environment will have certain influence on the use of the variable temperature battery. For example, when the environmental temperature is too high, the battery cell overheats, the internal resistance of the battery is increased, the self-consumption power is too large, and the battery cell is easily damaged. The variable temperature structure cools and dissipates heat for the battery cell, so that the battery cell works at an appropriate temperature. When the environmental temperature is too low, for example, the environmental temperature is lower than -20 DEG C, the battery cell cannot be used, and the variable temperature structure heats and warms the battery cell, so that the battery cell works at an appropriate temperature. Specifically, the battery cell has a first surface and a second surface. It should be noted that the first surface and the second surface can be large surfaces of the battery cell, or other surfaces of the battery cell used for connecting the large surfaces, and the embodiment does not make any limitation in this regard. The variable temperature mechanism comprises a heating piece and a cooling piece, the heating piece is in contact with the first surface, the cooling piece is arranged on the second surface, and further, a phase change layer is arranged between the cooling piece and the second surface, and the phase change layer is in contact with the cooling piece and the second surface.

[0009] In actual application, when the environment temperature is too low, the heating element generates heat and transmits heat to the battery cell through contact with the first surface to increase the temperature of the battery cell, thereby realizing normal work of the battery cell, meanwhile, the phase change layer can isolate the cooling element to prevent the cooling element from cooling the battery cell, further guaranteeing the working temperature of the battery cell. When the environment temperature is too high, the heating element does not work, the first surface of the battery cell can play a role of heat dissipation, meanwhile, when the temperature of the battery cell reaches the preset temperature, the phase change layer works and absorbs heat, and the cooling element accelerates the heat flow area of the battery and accelerates the heat dissipation speed. In the embodiment of the utility model, compared with the passive adjustment of the battery cell temperature in the prior art, the active temperature adjustment of the battery cell is converted to adjust the battery cell temperature, which has the beneficial effect of improving the working stability of the temperature adjustment battery.

[0010] Optionally, in the embodiment of the utility model, the phase change layer is bonded to the cooling element.

[0011] Optionally, in the embodiment of the utility model, the heating element covers the first surface along the direction perpendicular to the first surface, and the cooling element and the phase change layer both cover the second surface along the direction perpendicular to the second surface.

[0012] Optionally, in the embodiment of the utility model, the cooling element comprises a first film layer and a second film layer, the first film layer and the second film layer enclose a sealed cooling flow channel, the cooling flow channel is used for containing a cooling medium, and the first film layer is attached to the phase change layer.

[0013] Optionally, in the embodiment of the utility model, the cooling flow channel comprises a plurality of flow portions and a plurality of connecting portions, the flow portions are uniformly and spacedly arranged along a first direction, and the connecting portions communicate with adjacent two flow portions.

[0014] Optionally, in the embodiment of the utility model, the cooling flow channel comprises an inlet and an outlet, and the cooling element further comprises an inlet one-way valve, the inlet one-way valve is connected to the cooling flow channel, and the inlet one-way valve is arranged at a position close to the inlet.

[0015] Optionally, in the embodiment of the utility model, the heating element is a heating wire and / or a heating net.

[0016] Optionally, in the embodiment of the utility model, the heating element is a heating wire, the heating wire comprises a plurality of vertical segments and a plurality of horizontal segments, the vertical segments and the horizontal segments are alternately connected, and the plurality of vertical segments are uniformly and spacedly arranged along a first direction.

[0017] Optionally, in the embodiment of the utility model, the phase change layer is made of a composite phase change material.

[0018] In the second aspect, the utility model embodiment further provides an electronic device, include: as described above variable temperature battery, PCB, the PCB is electric connection with cooling piece and heating piece respectively. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is the structural schematic diagram of variable temperature battery in the utility model embodiment,

[0020] Fig. 2 It is the structural schematic diagram of first surface in the utility model embodiment,

[0021] Fig. 3 It is the structural schematic diagram of second surface in the utility model embodiment.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 10, variable temperature structure, 11, heating piece, 12, cooling piece, 121, cooling runner, 13, phase change layer, 14, one-way valve, 20, electric core. DETAILED DESCRIPTION

[0024] The technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, and obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] The terms "first", "second" and the like in the specification and claims of the utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" and the like are usually a kind, and the number of objects is not limited, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are a kind of "or" relationship.

[0026] The variable temperature battery and electronic device provided by the utility model embodiment will be described in detail below in conjunction with the drawings and specific embodiments and application scenarios.

[0027] Reference Figs. 1 to 3The utility model discloses an embodiment provides a kind of temperature-variable battery, including temperature-variable structure 10 and electric core 20, temperature-variable structure 10 and electric core 20 contact;Electric core 20 includes oppositely arranged first face and second face, temperature-variable structure 10 includes heating element 11, cooling element 12 and phase change layer 13;Heating element 11 and first face contact, cooling element 12 is arranged on second face;Phase change layer 13 is arranged between cooling element 12 and electric core 20, and phase change layer 13 is contacted with second face and cooling element 12.

[0028] In the utility model embodiment, temperature-variable battery in use process, with the change of temperature in environment can cause certain influence to the use of temperature-variable battery.For example, when environmental temperature is too high, electric core 20 overheating can cause battery internal resistance to change big, self-consumption electricity is too big, prone to battery damage, temperature-variable structure 10 carries out cooling and heat dissipation to battery, so that electric core 20 works at suitable temperature.When environmental temperature is too low, for example, environmental temperature is lower than-20 DEG C, electric core 20 cannot be used, temperature-variable structure 10 carries out heating and heating to electric core 20, so that electric core 20 works at suitable temperature.Specifically, electric core 20 has first face and second face, need to be explained, first face and second face can be the big face of electric core 20, can also be other surface of electric core 20 for connecting big face, this embodiment does not make any limitation to this.Temperature-variable mechanism includes heating element 11 and cooling element 12, wherein, heating element 11 and first face contact, cooling element 12 is arranged on second face, further, cooling element 12 and second face are also provided with phase change layer 13, and phase change layer 13 is contacted with cooling element 12 and second face.

[0029] In practical application, when environmental temperature is too low, heating element 11 generates heat and passes through and first face contact to transfer heat to electric core 20 to improve electric core 20 temperature, to realize the normal work of electric core 20, simultaneously, phase change layer 13 can isolate cooling element 12, prevent cooling element 12 from cooling electric core 20, further guarantee the working temperature of electric core 20.When environmental temperature is too high, heating element 11 does not work, and the first face of electric core 20 can play the role of heat dissipation, simultaneously, when the temperature of electric core 20 reaches preset temperature, phase change layer 13 works and absorbs heat, and cooling element 12 accelerates the heat flow area of battery, accelerates the speed of heat dissipation.In the utility model embodiment, by setting phase change layer 13, compared with the passive adjustment of the temperature of electric core 20 in prior art, it is converted into the active temperature adjustment of temperature-variable battery to adjust the temperature of electric core 20, with the beneficial effect of improving the working stability of temperature-variable battery.

[0030] Optionally, in the utility model embodiment, phase change layer 13 is bonded to cooling element 12.

[0031] In the embodiment of the utility model, the cooling member 12 can be a film structure, the phase change layer 13 can be bonded on the cooling member 12, in the case that the battery cell 20 generates heat, the heat is transferred to the phase change layer 13 through the second surface, the phase change layer 13 changes in physical properties after reaching the phase change temperature, changes from the original solid state to liquid state, since the phase change layer also has certain fluidity, it can fill the gap between the second surface and the cooling member 12, replaces air to conduct heat, can effectively transfer the heat from the second surface to the cooling member 12, and then spreads the heat through the cooling member 12, increases the heat dissipation area and improves the heat dissipation efficiency.

[0032] It should be noted that the phase change layer 13 can also be printed on the steel mesh, and in other embodiments, the phase change layer 13 can be made into a sheet structure and bonded on the cooling member 12.

[0033] Optionally, in the embodiment of the utility model, the heating member 11 covers the first surface in the direction perpendicular to the first surface, and the cooling member 12 and the phase change layer 13 both cover the second surface in the direction perpendicular to the second surface.

[0034] In the embodiment of the utility model, in order to effectively heat and cool the battery cell 20, the heating member 11 covers the first surface of the battery cell 20, in actual application, covering the first surface can effectively utilize the area of the first surface to transfer heat from the heating member 11 to the battery cell 20, which can improve the uniformity of heat transfer on the one hand and improve the efficiency of heat transfer on the other hand. Similarly, the cooling member 12 and the phase change layer 13 cover the second surface of the battery cell, in actual application, covering the second surface can effectively utilize the area of the second surface to transfer heat from the battery cell 20 to the cooling member 12 and the phase change layer 13, which can improve the uniformity of heat dissipation on the one hand and improve the efficiency of heat dissipation on the other hand.

[0035] Optionally, in the embodiment of the utility model, the cooling member 12 includes a first film layer and a second film layer, the first film layer and the second film layer enclose a sealed cooling flow channel 121, the cooling flow channel 121 is used for containing a cooling medium, and the first film layer is attached to the phase change layer 13.

[0036] In the embodiment of the utility model, the first film layer and the second film layer are arranged to form the cooling flow channel 121, and the cooling flow channel 121 is arranged to contain the cooling medium, in actual application, the cooling medium absorbs the heat transferred from the battery cell 20 in the first film layer and the second film layer to achieve heat dissipation of the battery cell 20. In actual application, in order to make the cooling member 12 and the battery cell 20 completely contact without gap, the cooling flow channel 121 is enclosed by the first film layer and the second film layer with certain flexibility, so that the cooling member 12 can be wrapped on the first surface without gap between the first surface, thereby improving the heat dissipation effect of the battery cell 20.

[0037] Optionally, in the embodiment of the utility model, cooling flow channel 121 includes multiple flow parts and multiple connecting parts, the flow parts are uniformly and spacedly arranged along the first direction, and the connecting parts are communicated with adjacent two flow parts.

[0038] In the embodiment of the utility model, the cooling medium flows in the cooling flow channel 121 to take away the heat of the battery cell 20, specifically, the flow parts are uniformly and spacedly arranged along the first direction to realize the uniform heat dissipation of the battery cell 20. Further, the first direction can be the length direction of the temperature-variable battery, can also be the width direction of the temperature-variable battery, or can be other directions, and the embodiment does not limit the specific direction of the first direction. Further, the connecting parts are communicated with adjacent two flow parts, in actual application, the cooling medium can flow through the flow parts, the connecting parts and another flow part in the cooling flow channel 121 to realize the cooling effect on the battery cell 20.

[0039] Optionally, in the embodiment of the utility model, the cooling flow channel 121 includes a liquid inlet and a liquid outlet, and the cooling member 12 further includes a liquid inlet check valve 14, the liquid inlet check valve 14 is connected to the cooling flow channel 121, and the liquid inlet check valve 14 is arranged at a position close to the liquid inlet.

[0040] In the embodiment of the utility model, the cooling medium flows into the cooling flow channel 121 from the liquid inlet, and flows out from the liquid outlet after flowing through the multiple flow parts and the multiple connecting parts. The setting of the check valve 14 only allows the cooling medium to flow from the liquid inlet to the liquid outlet, at this time, the cooling medium completes a cycle, and when the cooling medium flows out of the liquid outlet, the heat absorbed from the battery cell 20 is released to the outside of the battery cell 20, thereby realizing the efficient heat dissipation of the battery cell 20.

[0041] Optionally, in the embodiment of the utility model, the heating member 11 is a heating wire and / or a heating net.

[0042] In the embodiment of the utility model, the heating member 11 can be a heating wire, the heating member 11 can also be a heating net, and the heating member 11 can also be a combination of a heating wire and a heating net. For example, part of the heating member 11 is a heating net, and the other part is a heating wire, and the heating wire is wound on the heating net to realize the mutual connection between the two. The heating net is an integral structure, and the heating net can realize more stable contact with the first surface, and has the beneficial effect of being easy to assemble and set in actual application. The heating wire has the characteristics of being easy to deform, and can adjust its shape according to the position and shape of the first surface, thereby realizing contact with the first surface, and has the beneficial effect of being convenient to adjust the position and shape to improve the heat transfer efficiency. The combination of the heating wire and the heating net has all the characteristics and beneficial effects of the heating net and the heating wire described above, and will not be repeated here.

[0043] It should be noted that the mesh density of the heating net can be set as uniform density, and the heating net with uniform mesh density can improve the uniformity of heating, can realize uniform heating of the battery cell, and has the beneficial effect of improving user experience.

[0044] Optionally, in the embodiment of the utility model, the heating element 11 is a heating wire, the heating wire includes multiple vertical segments and multiple horizontal segments, the vertical segments and the horizontal segments are alternately connected, and the multiple vertical segments are uniformly and spacedly arranged along the first direction.

[0045] In the embodiment of the utility model, specifically, the vertical segments are uniformly and spacedly arranged along the first direction to realize uniform heating of the battery cell 20. Further, the first direction can be the length direction of the temperature-variable battery, can also be the width direction of the temperature-variable battery, or can be other directions, and the embodiment does not limit the specific direction of the first direction. Further, the horizontal segments are connected with adjacent two vertical segments, and in actual application, the vertical segments and the horizontal segments in the heating wire can both heat to realize the heating effect on the battery cell 20.

[0046] Optionally, in the embodiment of the utility model, the material of the phase change layer 13 is a composite phase change material.

[0047] In the embodiment of the utility model, when the ambient temperature is too high, the phase change material absorbs and stores a large amount of latent heat, and at the same time, the cooling element 12 also works to take away the heat of the battery cell 20 to realize the heat dissipation of the battery cell 20. When the ambient temperature is too low, the heat stored by the phase change material is dissipated to the environment in a certain temperature range, and inverse phase change can occur. In the two phase change processes, the energy stored or released is called phase change latent heat. When the physical state changes, the temperature of the material itself remains almost unchanged before the phase change is completed, forming a wide temperature platform. Although the temperature does not change, the latent heat absorbed or released is quite large. Further, the composite phase change material combines organic and inorganic materials to improve its thermal stability and thermal conductivity. Common composite phase change materials include mixtures of paraffin and salt hydrates, composite materials of polymers and inorganic salts, etc.

[0048] Optionally, in the embodiment of the utility model, an electronic device is also provided, which includes: the temperature-variable battery as above; and a PCB, which is electrically connected with the cooling element 12 and the heating element 11 respectively.

[0049] In the embodiment of the present application, the PCB is arranged to control the operation of the cooling member 12 and the electric heating member, and when the temperature of the temperature-variable battery is too low, the heating member 11 operates to generate heat to increase the temperature of the battery cell 20. When the temperature of the temperature-variable battery is too high, the phase change layer 13 operates, and at the same time, the cooling member 12 also cools the battery cell 20 to dissipate heat of the battery cell 20. Further, since the embodiment of the present application comprises all the features of the temperature-variable battery as described above, it also has all the beneficial effects of the temperature-variable battery as described above, and the embodiment will not be described here.

[0050] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements recited, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the phrase "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0051] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A variable-temperature battery, characterized in that, It includes a temperature-controlled structure (10) and a battery cell (20), wherein the temperature-controlled structure (10) and the battery cell (20) are in contact; The battery cell (20) includes a first surface and a second surface arranged opposite to each other, and the variable temperature structure (10) includes a heating element (11), a cooling element (12) and a phase change layer (13); The heating element (11) is in contact with the first surface, and the cooling element (12) is disposed on the second surface; The phase change layer (13) is disposed between the cooling element (12) and the battery cell (20), and the phase change layer (13) is in contact with both the second surface and the cooling element (12).

2. The variable-temperature battery according to claim 1, characterized in that, The phase change layer (13) is bonded to the cooling element (12).

3. The variable-temperature battery according to claim 1, characterized in that, The heating element (11) covers the first surface in a direction perpendicular to the first surface, and the cooling element (12) and the phase change layer (13) both cover the second surface in a direction perpendicular to the second surface.

4. The variable-temperature battery according to claim 1, characterized in that, The cooling element (12) includes a first film layer and a second film layer, which together form a sealed cooling channel (121) for containing a cooling medium. The first film layer and the phase change layer (13) are bonded together.

5. The variable-temperature battery according to claim 4, characterized in that, The cooling channel (121) includes multiple flow sections and multiple connecting sections. The flow sections are evenly spaced along a first direction, and the connecting sections connect two adjacent flow sections.

6. The variable-temperature battery according to claim 5, characterized in that, The cooling channel (121) includes an inlet and an outlet. The cooling component (12) also includes an inlet check valve (14), which is connected to the cooling channel (121) and is located near the inlet.

7. The variable-temperature battery according to claim 1, characterized in that, The heating element (11) is a heating wire and / or a heating mesh.

8. The variable-temperature battery according to claim 1, characterized in that, The heating element (11) is a heating wire, which includes multiple vertical segments and multiple horizontal segments. The vertical segments and the horizontal segments are connected alternately, and the multiple vertical segments are evenly spaced along the first direction.

9. The variable-temperature battery according to claim 1, characterized in that, The phase change layer (13) is made of a composite phase change material.

10. An electronic device, characterized in that, include: The variable-temperature battery as described in any one of claims 1 to 9; The PCB is electrically connected to the cooling element (12) and the heating element (11), respectively.

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