CN116073024A - Battery module and heating film thereof - Google Patents
Battery module and heating film thereof Download PDFInfo
- Publication number
- CN116073024A CN116073024A CN202111290421.9A CN202111290421A CN116073024A CN 116073024 A CN116073024 A CN 116073024A CN 202111290421 A CN202111290421 A CN 202111290421A CN 116073024 A CN116073024 A CN 116073024A
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- Prior art keywords
- heating
- battery module
- film
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a battery module and a heating film thereof, wherein the battery module comprises a plurality of electric cores and a steel binding belt, the steel binding belt binds the electric cores together, the battery module further comprises a heating film, the heating film comprises a film body and a heating wire, the heating wire is embedded in the film body, the heating film comprises an overcurrent section and a heating section, the overcurrent section is used for being arranged on the outer side of the steel binding belt, and the heating section is used for being stuck on the side surface of the battery module and heating the electric cores; the heating sections are at least provided with two, the overcurrent sections are positioned between the two adjacent heating sections, the overcurrent sections are provided with positioning grooves for being matched with the steel binding bands in a positioning mode, and the sectional area of the part of the heating wire positioned in the overcurrent sections is larger than that of the part of the heating wire positioned in the heating sections. Compared with the prior art, the contact area of the heating film and the battery cell is increased, and the heating capacity of the heating film to the battery cell is improved.
Description
Technical Field
The invention relates to a battery module and a heating film thereof, and belongs to the field of power batteries.
Background
The charge-discharge multiplying power of the battery module is closely related to the temperature, and under the condition of relatively cold temperature, if the temperature is unsuitable, the performance of the electric automobile and the service life of the battery can be seriously influenced.
The heating mode of the battery module in the current market mainly comprises external heating, wherein the main setting mode is to add rectangular heating films on the side face of the module, and the heating films are specifically adhered between an upper binding belt and a lower binding belt of the module.
But the width of rectangle heating diaphragm is less, and the area that generates heat is little to the heating diaphragm is located between two steel bandage, only can cover the half area of every electric core side, and heating capacity is not enough, easily causes the rate of rise in each position of electric core to have the difference, leads to the temperature inequality of electric core.
Disclosure of Invention
The invention aims to provide a heating film of a battery module, which solves the technical problem that the heating area of the heating film of the battery module is smaller in the prior art. The invention also provides a battery module to solve the technical problem of small heating area of the heating film of the battery module in the prior art.
In order to achieve the above purpose, the technical scheme of the heating film of the battery module provided by the invention is as follows: the heating film of the battery module comprises a film body and heating wires, wherein the heating wires are embedded in the film body, the heating film comprises an overcurrent section and a heating section, the overcurrent section is used for being arranged on the outer side of a steel binding belt of the battery module, and the heating section is used for being stuck on the side surface of the battery module and used for heating an electric core of the battery module; the heating sections are at least provided with two, the overcurrent sections are positioned between the two adjacent heating sections, the overcurrent sections are provided with positioning grooves for being matched with the steel binding bands in a positioning mode, and the sectional area of the part of the heating wire positioned in the overcurrent sections is larger than that of the part of the heating wire positioned in the heating sections.
The beneficial effects are that: according to the heating film of the battery module, the sectional area of the heating wire in the overcurrent section in the film body is larger than that of the heating wire in the heating section, so that the power of the heating wire in the overcurrent section is small, the heating capacity is small, the heating film is arranged on the side face of the steel binding belt in the battery module through the positioning groove, the overcurrent section is arranged between two adjacent heating sections, the heating section spans the overcurrent section to cover the side face of the battery core in the battery module, and compared with the prior art, the contact area of the heating film and the battery core is increased, and the heating capacity of the heating film to the battery core is improved.
As a further improvement, the flow-through section is provided with two.
The beneficial effects are that: the number of the overcurrent sections is two, correspondingly, the number of the heating sections can be increased, and the coverage area of the heating film on the battery cells in the battery module is further increased.
As a further improvement, the positioning groove is formed by bending.
The beneficial effects are that: the constant head tank is by the shaping of bending of film body, and bulk strength is higher relatively, can with steel bandage adaptation, improves the joint strength between heating film and the electric core.
As a further improvement, the heating wires are arranged in a serpentine shape from one end of the film body to the other end.
The beneficial effects are that: the heating wires which are arranged in a snake shape are inconvenient to be connected with the power transmission line in the battery module, the length of the heating wires which can be contained in the film body can be increased, and the heating capacity of the heating film is improved.
The technical scheme of the battery module provided by the invention is as follows: the battery module comprises a plurality of battery cells and a steel binding belt, wherein the steel binding belt binds the battery cells together, the battery module further comprises a heating film, the heating film comprises a film body and a heating wire, the heating wire is embedded in the film body, the heating film comprises an overcurrent section and a heating section, the overcurrent section is used for being installed on the outer side of the steel binding belt, and the heating section is used for being stuck on the side face of the battery module and used for heating the battery cells; the heating sections are at least provided with two, the overcurrent sections are positioned between the two adjacent heating sections, the overcurrent sections are provided with positioning grooves for being matched with the steel binding bands in a positioning mode, and the sectional area of the part of the heating wire positioned in the overcurrent sections is larger than that of the part of the heating wire positioned in the heating sections.
The beneficial effects are that: according to the battery module provided by the invention, the sectional area of the heating wire in the overcurrent section in the film body of the heating film is larger than the sectional area of the heating wire in the heating section, so that the power of the heating wire in the overcurrent section is small, the heating capacity is small, the heating wire is arranged on the side surface of the steel binding belt through the positioning groove, and the overcurrent section is positioned between two adjacent heating sections, so that the heating section spans the overcurrent section to cover the side surface of the battery cell.
As a further improvement, the flow-through section is provided with two.
The beneficial effects are that: the number of the overcurrent sections is two, correspondingly, the number of the heating sections is increased, and the coverage area of the heating film on the battery cells in the battery module is further increased.
As a further improvement, the positioning groove is formed by bending.
The beneficial effects are that: the constant head tank is by the shaping of bending of film body, and bulk strength is higher relatively, can with steel bandage adaptation, improves the joint strength between heating film and the electric core.
As a further improvement, the heating wires are arranged in a serpentine shape from one end of the film body to the other end.
The beneficial effects are that: the heating wires which are arranged in a snake shape are inconvenient to be connected with the power transmission line in the battery module, the length of the heating wires which can be contained in the film body can be increased, and the heating capacity of the heating film is improved.
As a further improvement, the steel binding belt is sleeved with a heat shrinkage pipe.
The beneficial effects are that: the heat shrinkage sleeve is sleeved on the steel binding belt to cover the steel binding belt, so that the steel binding belt is prevented from wearing the heating film.
As a further improvement, the positioning groove and the steel binding belt are positioned and kept in relative positions by means of the adhesion effect of the heating section and the battery cell.
The beneficial effects are that: the positioning groove and the steel binding belt are positioned and kept in relative positions by means of the bonding effect of the heating section and the battery cell, and the electric heating device is convenient to install.
Drawings
Fig. 1 is a schematic view of a partial structure of a battery module according to the present invention;
FIG. 2 is a schematic view of the heating film of FIG. 1;
fig. 3 is a side view of fig. 2.
Reference numerals illustrate: 1. a battery cell; 2. an upper steel strap; 3. a lower steel strap; 4. a side plate; 5. heating the film; 50. a membrane body; 51. an upper heating section; 52. an intermediate heating section; 53. a lower heating section; 54. an upper side overcurrent section; 55. a lower side overcurrent section; 56. An expansion hole; 57. a wire outlet table; 6. an upper positioning groove; 7. and a lower positioning groove.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It should be noted that in the present embodiment, relational terms such as "first" and "second" and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation 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 but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the phrase "comprising one … …" or the like, as may occur, does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the depicted element.
In the description of the present invention, unless explicitly stated and limited otherwise, terms such as "mounted," "connected," and "connected" may be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, unless explicitly stated and limited otherwise, the term "provided" as may occur, for example, as an object of "provided" may be a part of a body, may be separately arranged from the body, and may be connected to the body, and may be detachably connected or may be non-detachably connected. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
as shown in fig. 1, the battery module comprises a plurality of battery cells 1 and two steel bands, wherein the two steel bands are divided into an upper steel band 2 and a lower steel band 3, and the two steel bands are sleeved on the module formed by the battery cells 1 at intervals up and down to bind the battery cells 1 together; and the two steel binding bands are sleeved with heat-shrinkable sleeves, so that the steel binding bands are prevented from scratching the battery cell 1; the side plate 4 is installed to the vertical side that the width direction of battery module extends, and the heating membrane 5 is installed to the vertical side that the length direction of battery module extends, and heating membrane 5 is used for heating electric core 1.
As shown in fig. 2 and 3, the heating film 5 comprises a film body 50, wherein the heater wires are installed in the inner part of the film body 50, and the heater wires are arranged in a serpentine shape in the film body 50 from one end to the other end in the length direction of the film body 50, so that more heater wires can be contained in the film body 50, the heating capacity of the heating film 5 is improved, one end of each heater wire is provided with a wire outgoing table 57, and the wire outgoing table 57 is positioned at the end part of the film body 50 and is used for being connected with a power transmission line.
The heating film 5 integrally comprises three heating sections and two overcurrent sections, wherein the three heating sections are an upper heating section 51, a middle heating section 52 and a lower heating section 53 respectively, the upper heating section 51 is positioned above the upper steel binding belt 2 and is bonded with the part of the electric core 1 positioned above the upper steel binding belt 2, the middle heating section 52 is positioned in the middle of the two steel binding belts and is bonded with the part of the electric core 1 positioned between the two steel binding belts, and the lower heating section 53 is positioned below the lower steel binding belt 3 and is bonded with the part of the electric core 1 positioned below the lower steel binding belt 3. The middle overcurrent section is also provided with a plurality of expansion holes 56 so as to avoid the expansion of the heating film 5 after the battery cell 1 is heated.
The two flow-through sections are respectively an upper flow-through section 54 and a lower flow-through section 55, the upper flow-through section 54 is used for covering the outer side of the upper steel binding belt 2, the lower flow-through section 55 is used for covering the outer side of the lower steel binding belt 3, particularly, the section area of the part of the heating wire in the flow-through section in the film body 50 is larger than the section area of the heating wire in the heating section, so that the power of the heating wire in the flow-through section is small, the heating capacity is small, and the heat shrinkage tube sleeved on the steel binding belt is prevented from being thermally deformed.
In order to enable the heating film 5 to be tightly matched with the battery cell 1, an upper side positioning groove 6 and a lower side positioning groove 7 are formed in a bending mode on the film body 50, the two positioning grooves are in one-to-one correspondence with the two steel binding bands, and are respectively correspondingly covered on the outer sides of the two steel binding bands when the heating film 5 is installed, so that the heating film 5 is tightly attached to the battery cell 1. Compared with the heating film adhered to the heat shrinkage tube, in the embodiment, the heating film 5 and the steel strap adopt a positioning fit mode, and a gap or fit exists between the heating film and the steel strap, so that the heating film and the steel strap can move relatively. Even if the heat shrinkage tube deforms, the heat shrinkage tube does not involve the heating film to deform the heating film, and the connection between the heating film and the battery cell is not affected.
In this embodiment, the upper positioning groove 6 coincides with the position of the upper flow-through section 54 on the heating film 5, and the lower positioning groove 7 coincides with the position of the lower flow-through section 55 on the heating film 5.
When the battery module is installed, the plurality of battery cells 1 are bound together through the upper side steel binding belts 2 and the lower side steel binding belts 3, then the heating film 5 is covered on the side surface of the battery cells 1, and the two steel binding belts are respectively sunk into the two positioning grooves.
According to the battery module provided by the invention, the sectional area of the heating wire positioned in the overcurrent section in the film body 50 of the heating film 5 is larger than the sectional area of the heating wire positioned in the heating section, so that the power of the heating wire in the overcurrent section is small, the heating capacity is small, the heating film is arranged on the side surface of the steel binding belt through the positioning groove, the overcurrent section is positioned between two adjacent heating sections, the side surface of the battery core 1 is covered by the heating section crossing the overcurrent section, and compared with the prior art, the contact area of the heating film 5 and the battery core 1 is increased, and the heating capacity of the heating film 5 on the battery core 1 is improved.
this embodiment differs from embodiment 1 in that: in embodiment 1, a plurality of battery cells 1 are bound and fixed by two steel bands which are vertically spaced, and two overcurrent sections are arranged on a heating film 5 corresponding to the two steel bands. In this embodiment, the plurality of electric cores are bound and fixed by three steel bands which are arranged up and down in sequence, and three overcurrent sections are arranged on the heating film corresponding to the three steel bands.
Embodiment 3 of the battery module provided in the present invention:
this embodiment differs from embodiment 1 in that: in embodiment 1, the positioning groove is formed by bending a die body. In this embodiment, the heating film is made of soft materials, and when the heating film is adhered to the side surface of the battery cell, the overflow section on the heating film naturally forms a positioning groove under the adhering force so as to avoid the steel binding belt.
Embodiment 4 of the battery module provided in the present invention:
this embodiment differs from embodiment 1 in that: in embodiment 1, the heating wires are provided in one piece, and the heating wires provided individually are arranged in a serpentine shape in the film body 50 from one end of the film body 50 to the other end. In this embodiment, a plurality of heating wires are provided, each heating wire is sequentially arranged from one end of the film body to the other end, and each heating wire is connected in parallel.
Example 5 of the battery module provided in the present invention:
this embodiment differs from embodiment 1 in that: in embodiment 1, the expansion holes 56 are provided in the intermediate heating section 52 of the heating film 5. In this embodiment, the three heating sections of the heating film are provided with expansion holes, and the expansion holes provided on the upper heating section and the lower heating section are circular holes.
Example 6 of the battery module provided in the present invention:
this embodiment differs from embodiment 1 in that: in example 1, a heat shrink tube was fitted over the steel strap. In the embodiment, the steel binding belt is not sleeved with the heat shrinkage tube, and the steel binding belt is directly contacted with the electric core and the heating film.
Example 7 of the battery module provided in the present invention:
this embodiment differs from embodiment 1 in that: in example 1, the heating film was in clearance fit with the heat shrink tube on the steel tie. In this embodiment, the heating film is bonded to the heat shrink tubing on the steel tie.
The invention also provides an embodiment of the heating film of the battery module:
the heating film structure of the battery module in this embodiment is the same as the heating film 5 structure of the battery module in the above-mentioned battery module embodiment 1, and will not be described here again.
Of course, in other embodiments, the heating film of the battery module may also be the structure of the heating film 5 in any of the embodiments 2 to 5 of the battery module, which is not described herein again.
The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The heating film of the battery module is characterized by comprising a film body (50) and heating wires, wherein the heating wires are embedded in the film body (50), the heating film (5) comprises an overcurrent section and a heating section, the overcurrent section is used for being arranged on the outer side of a steel binding belt of the battery module, and the heating section is used for being stuck on the side surface of the battery module and used for heating an electric core (1) of the battery module; the heating sections are at least provided with two, the overcurrent sections are positioned between the two adjacent heating sections, the overcurrent sections are provided with positioning grooves for being matched with the steel binding bands in a positioning mode, and the sectional area of the part of the heating wire positioned in the overcurrent sections is larger than that of the part of the heating wire positioned in the heating sections.
2. The heating film of a battery module according to claim 1, wherein the overcurrent section is provided with two.
3. The heating film of the battery module according to claim 1, wherein the positioning groove is bent and formed.
4. A heating film of a battery module according to claim 1 or 2 or 3, characterized in that the heating wires are arranged in a serpentine shape from one end of the film body (50) to the other end.
5. The battery module comprises a plurality of electric cores (1) and a steel binding belt, wherein the electric cores (1) are bound together by the steel binding belt, and the battery module is characterized by further comprising a heating film (5), wherein the heating film (5) comprises a film body (50) and heating wires, the heating wires are embedded in the film body (50), the heating film (5) comprises an overcurrent section and a heating section, the overcurrent section is used for being installed on the outer side of the steel binding belt, and the heating section is used for being adhered to the side face of the battery module and used for heating the electric cores (1); the heating sections are at least provided with two, the overcurrent sections are positioned between the two adjacent heating sections, the overcurrent sections are provided with positioning grooves for being matched with the steel binding bands in a positioning mode, and the sectional area of the part of the heating wire positioned in the overcurrent sections is larger than that of the part of the heating wire positioned in the heating sections.
6. The battery module according to claim 5, wherein the overcurrent section is provided with two.
7. The battery module of claim 5, wherein the positioning groove is bent and formed.
8. The battery module according to claim 5 or 6 or 7, wherein the heating wires are arranged in a serpentine shape from one end of the film body (50) to the other end.
9. The battery module according to claim 5, 6 or 7, wherein the steel strap is sleeved with a heat shrink tube.
10. The battery module according to claim 5, 6 or 7, wherein the positioning groove and the steel strap are positioned and kept in relative positions by means of the adhesion of the heating section and the electric core (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111290421.9A CN116073024A (en) | 2021-11-02 | 2021-11-02 | Battery module and heating film thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111290421.9A CN116073024A (en) | 2021-11-02 | 2021-11-02 | Battery module and heating film thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116073024A true CN116073024A (en) | 2023-05-05 |
Family
ID=86172084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111290421.9A Pending CN116073024A (en) | 2021-11-02 | 2021-11-02 | Battery module and heating film thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116073024A (en) |
-
2021
- 2021-11-02 CN CN202111290421.9A patent/CN116073024A/en active Pending
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