CN210403959U - Temperature display battery pack shell and battery pack - Google Patents

Abstract

The utility model provides a temperature display battery package shell and battery package. The temperature display battery pack shell comprises a battery case main body and an invertible color block. A reversible color-changing piece is provided on the battery case main body, and the reversible color-changing piece changes color with a change in temperature inside the battery case main body. The battery package includes temperature display battery package shell, and the battery package still includes insulating heat-conducting piece and the piece that generates heat, and insulating heat-conducting piece contacts with the piece that generates heat, every reversible color changing piece respectively. The temperature display method for the battery pack shell comprises the following steps: when the temperature in the battery shell main body reaches different discoloration temperature sections, the reversible discoloration block wholly or partially displays different colors.

Description

Temperature display battery pack shell and battery pack

Technical Field

The utility model relates to a battery package technical field, more specifically relate to a temperature display battery package shell and battery package.

Background

During both charging and discharging, the battery may experience a build up of heat that causes the temperature to rise. Particularly, in the case of failure of the charger and degradation of the battery, the battery pack may cause thermal runaway of the battery during charging. The internal temperature of the battery pack cannot be known in the charging process of the conventional battery pack, and the battery pack is always in an overcharged state, so that the battery pack is ignited and burnt. The battery pack has short burning time from the rise of the thermal runaway temperature to the firing, so that a fire disaster is very easy to happen, and the personnel and property loss is caused.

In order to overcome the problems, a temperature sensor is arranged in some battery packs, the battery packs are connected with a data line to read internal data so that the internal temperature of the battery packs can be known, or the battery packs transmit mobile signals to a background, and platform software displays the internal temperature table of the battery packs. However, extra equipment, personnel or network platforms are required to read the internal temperature of the battery pack, so that the equipment cost and the labor cost are high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art's at least one not enough, provide a temperature display battery package shell and battery package.

In order to realize the above purpose, the utility model provides a temperature display battery package shell, including battery case main part and at least one invertible color lump. The reversible color block is arranged on the battery case main body, and the reversible color block changes color along with the change of the temperature in the battery case main body.

Optionally, the reversible color block has one color block and a plurality of color-changing temperature segments, and the reversible color block is embedded on the battery case main body so as to change into a plurality of different colors as the temperature inside the battery case main body respectively reaches different color-changing temperature segments.

Optionally, the reversible color-changing block is provided with a plurality of reversible color-changing blocks, each reversible color-changing block is provided with a plurality of or single color-changing temperature sections, and the plurality of reversible color-changing blocks are embedded on the battery case main body.

Optionally, the reversible color changing block includes a plurality of color changing layers, adjacent color changing layers are tightly attached to each other, and each color changing layer changes into a plurality of different colors as the temperature inside the battery case main body reaches different color changing temperature sections respectively.

Optionally, each color-changing layer has a first protrusion and a second protrusion protruding towards two opposite sides, the first protrusions between adjacent color-changing layers are nested with each other, and the second protrusions between adjacent color-changing layers are nested with each other.

Optionally, the battery case body comprises a battery cover and a battery pack side wall, and the at least one reversible color block is arranged on the battery cover or the battery pack side wall.

Optionally, the battery case body has at least one mounting groove for providing at least one reversible color block, the bottom wall of the mounting groove has at least one through hole, the reversible color block has at least one convex pillar made of an insulating and heat-conducting material corresponding to the at least one through hole, and the at least one convex pillar is inserted into the at least one through hole so as to reach the inside of the battery case body.

Optionally, the at least one color changing block forms the battery case body.

The utility model also provides a battery package, including any as above temperature display battery package shell, battery package still includes the insulating heat-conducting piece and generates heat the piece, the insulating heat-conducting piece respectively with generate heat piece, every reversible piece contact that discolours.

To sum up, the utility model provides a temperature display battery package shell can be in order to realize the function of suggestion temperature, need not temperature sensor and extra equipment, just can judge the inside temperature variation of battery case through the naked eye through the colour of the contravariant color lump that sets up on the battery package shell to play the effect of warning. The reversible color-changingblock 1 is made of reversible color-changing materials, so that the reversible color-changing block can be repeatedly used.

Drawings

Fig. 1 is a schematic diagram of a temperature display battery pack case according to an embodiment of the present invention;

fig. 2 is a schematic diagram of another temperature display battery pack housing according to an embodiment of the present invention;

fig. 3 is a temperature-rise and color-change curve diagram of a reversible color-change material provided by an embodiment of the present invention;

fig. 4 is a temperature-reducing discoloration curve diagram of a reversible discoloration material according to an embodiment of the present invention;

fig. 5 is a schematic view of an invertible color block provided by an embodiment of the present invention;

fig. 6 is a schematic view of another invertible color block provided by an embodiment of the present invention;

fig. 7 is a schematic view of an invertible color block and an insulating heat-conducting member provided by an embodiment of the present invention;

fig. 8 is a schematic view of a convex pillar of an invertible color block according to an embodiment of the present invention;

fig. 9 is a schematic view of a through hole of a battery case body according to an embodiment of the present invention; and

fig. 10 is a schematic diagram of a layer structure of an invertible color block having a first protrusion and a second protrusion according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Please refer to fig. 1 and fig. 2. The embodiment provides a temperature display battery pack shell, which comprises a battery casemain body 6 and aninvertible color block 1. Aninvertible color lump 1 is provided on thebattery case body 6, and theinvertible color lump 1 is discolored with a change in temperature of the inside of thebattery case body 6.

The thermal runaway of the battery can be caused under the condition that the charger fails and the battery is attenuated, so that the battery pack is ignited and burnt during charging. And the utility model provides a temperature display battery package shell can need not temperature sensor and extra equipment in order to realize the function of suggestion temperature, just can judge the inside temperature variation of battery case through the naked eye through the colour of theinvertible color lump 1 that sets up on the battery package shell to play the effect of warning. The reversible color-changingblock 1 is made of reversible color-changing materials, so that the reversible color-changingblock 1 can be repeatedly used.

Although the number of the reversible color-changingblocks 1 of the present embodiment is one (as shown in fig. 6), and the reversible color-changingblock 1 is made of a uniform color-changing material, the reversible color-changingblock 1 has a plurality of color-changing temperature sections, and is mounted on thebattery case body 6 so as to change into a plurality of different colors as the temperature inside thebattery case body 6 reaches different color-changing temperature sections, respectively. . However, in other embodiments, the number of the reversible color-changingblocks 1 may also be any number (as shown in fig. 5) such as 3, 5, etc., each color-changing block is made of a uniform color-changing material, and the color-changing material components between the plurality of color-changing blocks are not consistent, so as to implement different changes of colors in multiple color-changing temperature segments. The color change graphs of the reversible color-changing material are shown in fig. 3 and fig. 4.

In other embodiments, the reversible color-changingblock 1 may further include a plurality of color-changinglayers 5, the color-changing material of each color-changinglayer 5 is not uniform, adjacent color-changinglayers 5 are tightly attached to each other, and each color-changinglayer 5 changes into a plurality of different colors as the temperature inside thebattery case body 6 reaches different color-changing temperature ranges. Furthermore, each color-changinglayer 5 has afirst protrusion 51 and asecond protrusion 52 protruding to opposite sides, thefirst protrusions 51 between adjacent color-changinglayers 5 are nested with each other, thesecond protrusions 52 between adjacent color-changinglayers 5 are nested with each other, the conduction speed of heat is related to not only the kind of material, but also the thickness, and if the thickness is not properly set, the sensitivity of thereversible color block 1 to temperature change is greatly affected. The arrangement of thefirst protrusions 51 and thesecond protrusions 52 ensures that the same color-changinglayer 5 is arranged in different thickness directions, and overcomes the defect that the display temperature is not rapid and sensitive due to slow heat conduction, as shown in fig. 10.

In this embodiment, the color-changing material ofreversible color lump 1 is prepared from an electron transfer type organic compound system. The electron transfer type organic compound is an organic color system with a special chemical structure. The molecular structure of the organic substance is changed by electron transfer at a specific temperature, thereby realizing color conversion. The temperature sensing toner is a spherical microencapsulated reversible temperature sensing color changing substance with the diameter of 2-7 microns, and the microcapsule is provided with an insoluble and infusible transparent protective layer with the thickness of 0.1-0.5 micron. The substrate of thereversible color block 1 comprises transparent materials such AS PE, PP, PS, AS and the like. One or more temperature-sensitive color-changing powder microcapsules are mixed with a base material and are processed and formed through an injection molding machine; the mass content of the toner microcapsule is 0.01-5%, and the other components are plastic base material, heat-resisting auxiliary agent, anti-ultraviolet auxiliary agent, heat-conducting auxiliary agent and the like.

Furthermore, theinvertible color block 1 can be directly embedded on the battery casemain body 6, the function of the battery casemain body 6 is upgraded and expanded, the temperature sensing part block can be replaced after failure, and the cost is low.

In this embodiment, thebattery case body 6 includes abattery cover 2 and abattery pack sidewall 3, and thereversible color block 1 is disposed on thebattery pack sidewall 3, when the battery pack is in a high usage environment, thebattery cover 2 is too high, and the observation is inconvenient, while thereversible color block 1 disposed on thesidewall 3 of this embodiment is beneficial for the user to observe. In other embodiments, the reversible color-changingblock 1 can also be disposed on thebattery cover 2, and since the battery pack is generally stored in an electric device such as a device, an instrument, a vehicle, etc. when the battery pack is used, a user can only observe thebattery cover 2, and the reversible color-changingblock 1 is disposed on thebattery cover 2, which is more convenient for observation.

Furthermore, the battery casemain body 6 has amounting groove 21 for disposing thereversible color lump 1, the bottom wall of themounting groove 21 has a plurality of throughholes 211, thereversible color lump 1 has a plurality ofconvex columns 11 made of insulating heat conductive material corresponding to the plurality of throughholes 211, and the plurality ofconvex columns 11 are inserted into the plurality of throughholes 211 so as to reach the inside of the battery casemain body 6. The through-holes 211 can increase heat exchange between the inside of thebattery case body 6 and the reversiblecolor changing block 1, as shown in fig. 8 and 9. However, in other embodiments, a plurality of protrudingcolumns 11 are disposed on thebattery case body 6 with themounting grooves 21, and correspondingly, a plurality of holes matching with theprotruding columns 11 are disposed on thereversible color block 1.

In other embodiments, thebattery case body 6 may be formed using a color-changing block. The entire battery case may display different colors according to temperature, so that it is more apparent that a user can more easily find a change in the internal temperature.

The utility model also provides a battery pack, including any as above temperature display battery package shell, battery pack still includes insulating heat-conductingpiece 4 and the piece that generates heat, insulating heat-conductingpiece 4 respectively with generate heat piece, everycontravariant color lump 1 contact. The insulating heat-conductingmember 4 can be a hollow cylindrical structure, and can also be heat-conducting glue and the like, so that heat exchange between the inside of thebattery case body 6 and the reversible color-changingblock 1 is facilitated. The heating element can be a battery core, a tab, a wire, a circuit board and the like. The insulating and heat-conductingmember 4 can be made of thermal silicone adhesive or metal subjected to insulating treatment, as shown in fig. 7.

The utility model discloses still provide a temperature display method of temperature display battery package shell as above, when the temperature of the inside of battery casemain part 6 reachd different discolour temperature sections,reversible piece 1 that discolours wholly or the local colour that shows is different. In this embodiment, when the internal temperature of the battery pack is within the normal range, the temperature sensing member is colorless; when the internal temperature is within the tolerable range, the temperature sensing part displays blue; when the internal temperature is in a higher range, the temperature sensing part displays orange color; when the internal temperature is within the dangerous range, the temperature sensing member displays red. Different temperatures correspond to different operating contents.

It will be understood by those skilled in the art that in the present disclosure, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships that are based on those shown in the drawings, which are merely for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the terms should not be construed as limiting the invention.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. A temperature display battery pack housing, comprising:

a battery case body;

the reversible color-changing block is arranged on the battery case main body, and the reversible color-changing block changes color along with the change of the temperature in the battery case main body.

2. The temperature display battery pack case according to claim 1, wherein the reversible color block has one and a plurality of color-changing temperature sections, and the reversible color block is mounted on the battery case body so as to be changed into a plurality of different colors as the temperature inside the battery case body reaches different color-changing temperature sections, respectively.

3. The temperature indicating battery pack case according to claim 1, wherein the reversible color-changing blocks are plural and each reversible color-changing block has plural or single color-changing temperature sections, and the plural reversible color-changing blocks are mounted on the battery case body.

4. The temperature display battery pack case according to claim 1, wherein the reversible color-changing block includes a plurality of color-changing layers, adjacent color-changing layers are closely attached to each other, and each color-changing layer changes into a plurality of different colors as the temperature inside the battery case body reaches different color-changing temperature ranges, respectively.

5. The temperature-indicating battery pack case according to claim 4, wherein each of the discoloration layers has a first protrusion and a second protrusion protruding to opposite sides, the first protrusions between adjacent discoloration layers are nested with each other, and the second protrusions between adjacent discoloration layers are nested with each other.

6. The temperature display battery pack case according to any one of claims 1 to 5, wherein the battery case body comprises a battery cover and a battery pack side wall, and the at least one reversible color block is disposed on the battery cover or the battery pack side wall.

7. The temperature display battery pack case according to any one of claims 1 to 5, wherein the battery case body has at least one mounting groove for disposing the at least one reversible color block, the bottom wall of the mounting groove has at least one through hole, the reversible color block has at least one boss made of an insulating and heat conductive material corresponding to the at least one through hole, and the at least one boss is inserted into the at least one through hole so as to reach the inside of the battery case body.

8. The temperature-indicating battery pack case according to claim 1, wherein said at least one color-changing block forms said battery case body.

9. A battery pack comprising the temperature display battery pack case according to any one of claims 1 to 8, the battery pack further comprising an insulating heat-conducting member and a heat-generating member, the insulating heat-conducting member being in contact with the heat-generating member and each of the reversible color-changing blocks, respectively.

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