Lithium battery structure with charging protection function

Abstract

The utility model discloses a lithium battery structure for charging protection, which comprises a lithium battery body, an inner middle-layer shell is coated outside the lithium battery body, an outer shell is coated outside the inner middle-layer shell, and a plurality of uniformly distributed heat conduction columns are fixedly mounted on the outer walls of the front surface and the back surface of the lithium battery body; one end of the heat conduction column penetrates through the inner middle-layer shell and is fixedly connected with the inner wall of the outer shell, a cavity is formed between the inner middle-layer shell and the outer shell, heat exchange liquid is injected into the cavity, a gap between the inner middle-layer shell and the lithium battery body is filled with heat conduction epoxy resin, and the upper surface of the top end of the outer shell is sealed through an upper packaging plate; the lithium battery structure disclosed by the utility model has double cooling protection effects of liquid heat exchange and export heat dissipation, heat dissipation and cooling protection can be effectively carried out on the lithium battery body during charging, the lithium battery is prevented from being overheated and short-circuited during charging, the use safety of the lithium battery is improved, and the service life of the lithium battery is prolonged. And potential safety hazards are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field, concretely is a kind of lithium battery structure of charge protection. BACKGROUND

[0002] Lithium battery is with lithium metal or lithium alloy as negative electrode material, using non-aqueous electrolyte solution battery, so this battery is also called lithium metal battery. Unlike other batteries, lithium batteries have high charge density, long life and high unit cost. According to the structure design and electrode material, lithium battery can produce 1.5V (equivalent to zinc-carbon or alkaline battery) to 3.7V voltage;

[0003] General lithium battery will be equipped with battery shell, can play the role of protection to lithium battery, however, when charging, the temperature of lithium battery will rise, if heat cannot be discharged in time, lithium battery is easily heated short circuit, affect charging safety, there is certain use safety hidden danger, for this purpose, the utility model provides a kind of lithium battery structure for charging protection by heat conduction, heat exchange and charging protection. INVENTION CONTENTS

[0004] The utility model discloses a kind of lithium battery structure of charge protection, to solve the problem raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of lithium battery structure of charge protection, including lithium battery body, the outer portion of the lithium battery body is covered with inner middle layer shell, the outer portion of the inner middle layer shell is covered with shell body, the front and back outer wall of the lithium battery body are all fixedly installed with several evenly distributed heat conduction columns, one end of the heat conduction column is fixedly connected with the inner wall of inner middle layer shell and shell body by passing through inner middle layer shell, cavity is provided between the inner middle layer shell and shell body, heat exchange liquid is injected in cavity, the gap between the inner middle layer shell and lithium battery body is filled with heat conduction epoxy resin.

[0006] Preferably, the top end upper surface of the shell body is sealed by the upper packaging plate, and the bottom end lower surface of the shell body is sealed by the lower packaging plate.

[0007] Preferably, the upper packaging plate is fixedly installed with two electrode tabs on the outer surface.

[0008] Preferably, the two electrode tabs are positive electrode tabs and negative electrode tabs respectively, and the two electrode tabs are electrically connected with the lithium battery body.

[0009] Preferably, the inner middle layer shell, the shell body and the heat conduction column are made of high-thermal-conductivity metal material.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The heat of the lithium battery body can be conducted to two directions through the plurality of heat conduction columns arranged on the two end surfaces thereof, and the heat conducted out through the heat conduction columns can be subjected to heat exchange treatment with the heat exchange liquid of the outer layer, so that the heat generated during charging of the lithium battery is exchanged and cooled through the heat exchange liquid, so as to achieve the practical use purpose of heat conduction and heat exchange of the lithium battery body, and reduce the temperature during charging of the lithium battery.

[0012] The top end of the heat conduction column is connected to the outer shell body, so a part of the heat is also transmitted to the outer shell body through the heat conduction column, so that the internal heat is helped to be conducted out through the contact of the outer shell body with the normal temperature environment of the outside, so as to perform normal heat dissipation work, and through the cooperation of the above structure, the lithium battery structure of the utility model has the double cooling protection effect of liquid heat exchange and heat dissipation, can effectively perform heat dissipation and cooling protection during charging of the lithium battery body, avoid overheating and short circuit during charging of the lithium battery, improve the use safety of the lithium battery, and effectively reduce the safety hazard. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a lithium battery external three-dimensional structure schematic diagram of the embodiment of the utility model;

[0014] Figure 2 It is a lithium battery internal structure schematic diagram of the embodiment of the utility model;

[0015] Figure 3 It is an inner middle layer shell structure schematic diagram of the embodiment of the utility model;

[0016] Figure 4 It is a lithium battery internal planar view schematic diagram of the embodiment of the utility model.

[0017] In the figure: 1, lithium battery body; 2, inner middle layer shell; 3, outer shell body; 4, heat conduction column; 5, heat exchange liquid; 6, upper packaging plate; 7, lower packaging plate; 8, electrode tab. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it is necessary to explain that, unless otherwise expressly provided and limited, the terms "installation", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] Please refer to Figures 1-4 The utility model provides an embodiment: a kind of lithium battery structure of charge protection, including lithium battery body 1, referring to specific description attached Figure 2 And Figure 4 As shown in the drawings, the outer surface of lithium battery body 1 is covered with inner middle layer shell 2, the outer surface of inner middle layer shell 2 is covered with outer shell 3, the front surface and the back surface of lithium battery body 1 are both fixedly installed with several evenly distributed heat conduction columns 4, one end of heat conduction column 4 is fixedly connected with the inner wall of outer shell 3 through inner middle layer shell 2, cavity is arranged between inner middle layer shell 2 and outer shell 3, and heat exchange liquid 5 is injected into the cavity.

[0022] And in order to improve the heat conduction efficiency of internal structure, inner middle layer shell 2, outer shell 3 and heat conduction column 4 are all made of high-thermal-conductivity metal material, such as copper metal, which can be selected according to actual production cost requirements.

[0023] This kind of structure design, when internal lithium battery body 1 charges and generates heat, the heat of lithium battery body 1 can be conducted to two directions through the several heat conduction columns 4 arranged on its two end surfaces, and the heat conducted out of heat conduction column 4 can be heat-exchanged with the heat-exchanged heat exchange liquid 5 outside, so as to help the heat exchange liquid 5 to exchange heat and cool down the heat generated during lithium battery charging, so as to achieve the actual use purpose of heat conduction and heat exchange of lithium battery body 1, reduce the temperature during lithium battery charging.

[0024] And the top of the heat conduction column 4 is connected to the outer shell 3, so part of the heat will also be transmitted to the outer shell 3 through the heat conduction column 4, thereby contacting the normal temperature environment outside through the outer shell 3, thereby helping the internal heat to be exported to the normal heat dissipation work, through the cooperation of the above structure, the lithium battery structure of the utility model has the double cooling protection effect of liquid heat exchange and heat dissipation, which can effectively protect the lithium battery body 1 from heat dissipation during charging, avoid overheating and short circuit during lithium battery charging, improve the safety of lithium battery use, and effectively reduce the safety hazard.

[0025] The gap between the inner middle layer shell 2 and the lithium battery body 1 is filled with heat-conducting epoxy resin, which is a kind of epoxy resin with high thermal conductivity. The heat-conducting epoxy resin can have a certain heat-conducting effect, which can help to export the internal heat of the area not contacted by the heat-conducting column 4, and help to conduct heat and dissipate heat.

[0026] At the same time, the heat-conducting epoxy resin has excellent adhesion, which can make the inner middle layer shell 2 and the outer wall of the lithium battery body more tightly connected, improve the stability of the internal structure, and has good practical use effect.

[0027] In order to seal the gap between the heat-conducting column 4 and the inner middle layer shell 2, the gap between the heat-conducting column 4 and the inner middle layer shell 2 is filled with sealing resin glue, so as to effectively prevent the outer heat exchange liquid 5 from entering the inner structure through the gap, and has a certain sealing and waterproof use effect, which can effectively isolate the outer heat exchange liquid.

[0028] In this embodiment, in order to package the upper and lower ends of the lithium battery assembly, the top surface of the outer shell 3 is sealed by the upper packaging plate 6, and the bottom surface of the outer shell 3 is sealed by the lower packaging plate 7.

[0029] In this embodiment, in order to ensure the normal power connection of the utility model, two power connection tabs 8 are fixedly installed on the outer surface of the upper packaging plate 6, the two power connection tabs 8 are positive and negative power connection tabs respectively, and the two power connection tabs 8 are electrically connected with the lithium battery body 1, so as to ensure the normal power transmission of the utility model through the power connection tabs 8.

[0030] Working principle: when the lithium battery of the utility model is heated during charging, the heat of the lithium battery body 1 can be conducted to two directions through the heat-conducting columns 4 arranged on the two end surfaces, and the heat conducted by the heat-conducting columns 4 can be heat-exchanged with the outer heat exchange liquid 5, thereby helping to heat-exchange and cool the heat generated during lithium battery charging through the heat exchange liquid 5, so as to achieve the actual use purpose of heat-conducting and heat-exchanging the lithium battery body 1, and reduce the temperature during lithium battery charging;

[0031] And the top end of the heat conduction column 4 is connected with the outer shell 3, so part of the heat will also be transmitted to the outer shell 3 through the heat conduction column 4, thereby contacting the normal temperature environment outside through the outer shell 3, thereby helping the internal heat to be exported to the normal heat dissipation work, through the cooperation of the above structure, the lithium battery structure of the utility model has the double cooling protection effect of liquid heat exchange and heat dissipation, which can effectively protect the lithium battery body 1 from heat dissipation during charging, avoid overheating and short circuit during charging of the lithium battery, improve the use safety of the lithium battery, and effectively reduce the safety hazard;

[0032] And the gap between the inner middle layer shell 2 and the lithium battery body 1 is filled with heat conductive epoxy resin, which is a kind of epoxy resin with high thermal conductivity. The heat conductive epoxy resin can have a certain heat conduction effect, so that the area region not contacted by the heat conduction column 4 can be exported by the heat conductive epoxy resin, helping to conduct heat and dissipate heat.

[0033] At the same time, the heat conductive epoxy resin has excellent bonding performance, so that the inner middle layer shell 2 and the outer wall of the lithium battery body can be connected more tightly, improving the stability of the internal structure and having good practical use effect.

[0034] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A structure of a lithium battery with charge protection, comprising a lithium battery body (1), characterized in that, The lithium battery body (1) is coated with an inner middle shell (2), the outer surface of the inner middle shell (2) is coated with an outer shell (3), the front surface and the back surface of the lithium battery body (1) are fixedly installed with a plurality of evenly distributed heat conducting columns (4), one end of the heat conducting column (4) is fixedly connected with the inner wall of the outer shell (3) through the inner middle shell (2), a cavity is arranged between the inner middle shell (2) and the outer shell (3), the cavity is filled with a heat exchange liquid (5), and the gap between the inner middle shell (2) and the lithium battery body (1) is filled with heat conducting epoxy resin.

2. The charging-protected lithium battery structure of claim 1, wherein: The top end of the outer shell (3) is sealed by an upper sealing plate (6), and the bottom end of the outer shell (3) is sealed by a lower sealing plate (7).

3. The charging-protected lithium battery structure of claim 2, wherein: Two electrode connecting sheets (8) are fixedly installed on the outer surface of the upper sealing plate (6).

4. The charging-protected lithium battery structure of claim 3, wherein: The two electrode connecting sheets (8) are a positive electrode connecting sheet and a negative electrode connecting sheet, and the two electrode connecting sheets (8) are electrically connected with the lithium battery body (1).

5. The charging protected lithium battery structure of claim 1, wherein: The inner middle shell (2), the outer shell (3) and the heat conducting column (4) are made of high-heat-conducting metal material.

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