Hole-opening-free heating film capable of absorbing deformation and expansion of battery

Abstract

The utility model discloses a trepanning-free heating film capable of absorbing battery deformation and expansion, and relates to the field of battery heating films, the trepanning-free heating film comprises a bottom plate, a plurality of heating buffer modules are uniformly laid on the side wall of the bottom plate, each heating buffer module comprises a mounting bottom plate, and the surface of each mounting bottom plate is fixedly connected with a capsule body cover used for containing liquid. After the mounting bottom plate is gradually mounted to the specified length on the surface of the bottom plate, the redundant part of the bottom plate is cut off, the mounting bottom plate and the battery pack can be mounted in a battery shell together, and when the battery is deformed, liquid and air are stored in the bag body cover, so that the bag body cover can be extruded and deformed to a certain extent; meanwhile, after the wire is electrically connected with a temperature controller of the electric equipment, the heating wire can be controlled to heat to drive the liquid in the bag body cover to heat, so that the effects of heating the battery and absorbing battery deformation are achieved, meanwhile, timely adjustment can be performed according to battery shells with different lengths, and the adaptability and the practicability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heating films, in particular to a heating film that can absorb battery deformation and expansion without opening holes. Background Art

[0002] A battery heating film is a material used for heat preservation and heating, and is usually used in fields such as battery module heating and heat preservation, and electric vehicle suspension heating and heat preservation. It is often attached to the battery pack and installed in the battery housing together, and can keep the power battery at a suitable temperature required for battery life in cold weather.

[0003] However, during the daily use of the battery, volume expansion will occur, causing the film layer to be stretched and damaged, exposing the heating core, leading to dry burning and even causing thermal runaway of the battery device. Generally, a wet etching alloy material method is used for the general battery heating sheet to form a heating body, which is relatively hard and cannot absorb the deformation and expansion of the battery. Moreover, a heating film with a suitable specification size needs to be specially customized, and the adaptability is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a heating film that can absorb battery deformation and expansion without opening holes to solve the above problems, as described in detail below.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A heating film that can absorb battery deformation and expansion without opening holes provided by the utility model includes a bottom plate, and a plurality of heating and buffering modules are evenly laid on the side wall of the bottom plate. The heating and buffering module includes a mounting bottom plate, a bladder cover for containing liquid is fixedly connected to the surface of the mounting bottom plate, a heating wire is fixedly installed on the surface of the mounting bottom plate, both ends of the heating wire extend outside the bladder cover and are electrically connected to wires, and the two wires are respectively located on both sides of the bladder cover. Four corners of the mounting bottom plate are detachably connected to the bottom plate through bolt connectors.

[0007] When using the above-mentioned heating film that can absorb battery deformation and expansion without opening holes, an appropriate amount of conductive liquid is injected into the bladder cover, and then the mounting bottom plate is installed on the surface of the bottom plate in sequence, and the wires on two adjacent mounting bottom plates are electrically connected. When the installation reaches the specified length, the excess part of the bottom plate is cut off, and then it can be installed in the battery housing together with the battery pack. When the battery deforms, since there is liquid and air in the bladder cover, it can be deformed by a certain degree of extrusion, effectively absorbing the deformation and expansion. At the same time, when the wire is electrically connected to the temperature controller of the electrical equipment, the heating wire can be controlled to generate heat to drive the liquid in the bladder cover to heat up, achieving a heating effect.

[0008] Preferably, the bottom plate is a high-temperature and high-pressure heat-insulating plate.

[0009] Preferably, the bladder cover includes a rectangular plate and a telescopic part, which are integrally formed and cover the surface of the mounting base plate.

[0010] Preferably, a conductive liquid is filled in the cavity formed between the bladder cover and the mounting base plate.

[0011] Preferably, an annular heat-insulating pad is fixedly connected to the surface of the base plate. The size of the annular heat-insulating pad is adapted to the size of the base plate, and the thickness of the annular heat-insulating pad is adapted to the thickness of the bladder cover.

[0012] Preferably, the heating wire is made of rolled copper and is arranged in a U shape on the surface of the mounting base plate.

[0013] Preferably, the bolt connector includes a perforation formed in the mounting base plate, a bolt is inserted into the perforation, and a bolt hole threadedly connected to the bolt is formed on the surface of the base plate.

[0014] Preferably, the ends of the bolts and the perforations are both countersunk designs.

[0015] The beneficial effects are as follows:

[0016] After the mounting base plate is gradually installed to the specified length on the surface of the base plate and the excess part of the base plate is cut off, it can be installed in the battery case together with the battery pack. When the battery is deformed, since there is liquid and air inside the bladder cover, it can be deformed by a certain degree of extrusion. At the same time, when the wire is electrically connected to the temperature controller of the electrical equipment, the heating wire can be controlled to generate heat to drive the liquid in the bladder cover to heat up. While achieving the effects of heating the battery and absorbing the deformation of the battery, it can be adjusted in a timely manner according to battery cases of different lengths, improving the adaptability and practicality. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 is a three-dimensional view of the present invention;

[0019] Figure 2 is a sectional three-dimensional view of the bladder cover of the present invention.

[0020] The description of the reference numerals in the drawings is as follows:

[0021] 1. Bottom plate; 2. Mounting bottom plate; 3. Bolt connection member; 3a. Perforation; 3b. Bolt; 3c. Bolt hole; 4. Bladder cover; 41. Rectangular plate; 42. Telescopic part; 5. Heating wire; 6. Conducting wire; 7. Heat-insulating pad. Detailed implementation mode

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present utility model.

[0023] Refer to Figure 1 - Figure 2 As shown, the present utility model provides a heating film that can absorb battery deformation and expansion without opening holes, including a bottom plate 1. A plurality of heating and buffering modules are evenly laid on the side wall of the bottom plate 1. The heating and buffering module includes a mounting bottom plate 2. The surface of the mounting bottom plate 2 is fixedly connected with a bladder cover 4 for containing liquid. The surface of the mounting bottom plate 2 is fixedly installed with a heating wire 5. Both ends of the heating wire 5 extend to the outside of the bladder cover 4 and are electrically connected with a conducting wire 6. And the two conducting wires 6 are respectively located on both sides of the bladder cover 4. Four corners of the mounting bottom plate 2 are detachably connected to the bottom plate 1 through bolt connection members 3.

[0024] As an optional implementation manner, the bottom plate 1 is a high-temperature and high-pressure heat-insulating plate, which is formed by die lamination of high-temperature and high-pressure resistant resin, non-alkali fiberglass cloth and composite strengthening materials, improving the pressure resistance, heat-insulating performance and service life.

[0025] Further, the bladder cover 4 includes a rectangular plate 41 and a telescopic part 42. The rectangular plate 41 and the telescopic part 42 are integrally formed and cover the surface of the mounting bottom plate 2, which can make the rectangular plate 41 directly contact the surface of the battery pack, improving the contact surface strength of the bladder cover 4.

[0026] Specifically, a conductive liquid is filled in the cavity formed between the bladder cover 4 and the mounting bottom plate 2. The conductive liquid has a high specific heat value and boiling point (so that the liquid will not easily boil), and at the same time has good heat preservation.

[0027] Refer to Figure 1 As shown, the surface of the bottom plate 1 is fixedly connected with an annular heat-insulating pad 7. The size of the annular heat-insulating pad 7 is adapted to the size of the bottom plate 1, and the thickness of the annular heat-insulating pad 7 is adapted to the thickness of the bladder cover 4. When the side of the bottom plate 1 with a plurality of bladder covers 4 is attached to the surface of the battery pack, it can be more closely attached, avoiding the occurrence of gaps. At the same time, the annular heat-insulating pad 7 and the bottom plate 1 cooperate to form a heat-insulating chamber to avoid heat loss.

[0028] Furthermore, the heating wire 5 is made of rolled copper and is arranged in a U shape on the surface of the mounting base plate 2, which can enable the inside of the capsule cover 4 to have a good heat conduction effect.

[0029] As an optional implementation manner, the bolt connector 3 includes a perforation 3a formed in the mounting base plate 2. A bolt 3b is inserted into the perforation 3a, and a bolt hole 3c threadedly connected to the bolt 3b is formed on the surface of the base plate 1. After the mounting base plate 2 is located on the surface of the base plate 1, the bolt 3b is passed through the perforation 3a and then rotated in the bolt hole 3c to complete the installation and fixation of the mounting base plate 2.

[0030] Specifically, the end of the bolt 3b and the perforation 3a are both countersunk head designs, which can prevent the end of the bolt 3b from protruding outward and affecting the deformation range of the capsule cover 4.

[0031] With the above structure, during use, an appropriate amount of conductive liquid is injected into the capsule cover 4, and then the mounting base plate 2 is sequentially installed on the surface of the base plate 1, and the wires on two adjacent mounting base plates 2 are electrically connected. When the installation reaches the specified length, the redundant part of the base plate 1 is cut off, and then it can be installed in the battery case together with the battery pack. When the battery deforms, since there is liquid and air inside the capsule cover 2, it can be deformed by a certain degree of extrusion, effectively absorbing the deformation and expansion. At the same time, when the wire 6 is electrically connected to the temperature controller of the electrical equipment, the heating wire 5 can be controlled to generate heat to drive the liquid in the capsule cover 4 to heat up, achieving a heating effect.

[0032] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A heating film that can absorb battery deformation and expansion without opening holes, characterized in that: The invention comprises a bottom plate (1), a plurality of heating buffer modules are evenly laid on the side wall of the bottom plate (1), the heating buffer modules comprise a mounting bottom plate (2), a sac cover (4) for containing liquid is fixedly connected to the surface of the mounting bottom plate (2), a heating wire (5) is fixedly installed on the surface of the mounting bottom plate (2), both ends of the heating wire (5) extend to the outside of the sac cover (4) and are electrically connected to a wire (6), and the two wires (6) are respectively located on both sides of the sac cover (4), and the four corners of the mounting bottom plate (2) are detachably connected to the bottom plate (1) via bolt connectors (3).

2. The heating film without openings and capable of absorbing battery deformation and expansion according to claim 1, characterized in that: The bottom plate (1) is a high-temperature and high-pressure heat insulation plate.

3. The heating film without openings and capable of absorbing battery deformation and expansion according to claim 1, characterized in that: The capsule cover (4) comprises a rectangular plate (41) and a telescopic portion (42); the rectangular plate (41) and the telescopic portion (42) are integrally formed and are covered on the surface of the mounting base plate (2).

4. The heating film capable of absorbing battery deformation and expansion without opening holes according to claim 1, characterized in that: The cavity formed between the capsule cover (4) and the mounting base plate (2) is filled with conductive liquid.

5. The heating film without openings and capable of absorbing battery deformation and expansion according to claim 1, characterized in that: An annular heat-insulating pad (7) is fixedly connected to the surface of the bottom plate (1); the size of the annular heat-insulating pad (7) matches the size of the bottom plate (1), and the thickness of the annular heat-insulating pad (7) matches the thickness of the bladder cover (4).

6. The heating film without openings and capable of absorbing battery deformation and expansion according to claim 1, characterized in that: The heating wire (5) is made of rolled copper, and the heating wire (5) is arranged in a U shape on the surface of the mounting base plate (2).

7. The heating film without openings and capable of absorbing battery deformation and expansion according to claim 1, characterized in that: The bolt connector (3) comprises a through hole (3a) formed on the mounting base plate (2), a bolt (3b) being inserted into the through hole (3a), and a bolt hole (3c) threadedly connected to the bolt (3b) is formed on the surface of the base plate (1).

8. The heating film capable of absorbing battery deformation and expansion without opening holes according to claim 7, characterized in that: The end of the bolt (3b) and the through hole (3a) are both countersunk in design.

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