CN219575227U - Refractory harness and thermal runaway detection device - Google Patents
Refractory harness and thermal runaway detection device Download PDFInfo
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- CN219575227U CN219575227U CN202321286327.0U CN202321286327U CN219575227U CN 219575227 U CN219575227 U CN 219575227U CN 202321286327 U CN202321286327 U CN 202321286327U CN 219575227 U CN219575227 U CN 219575227U
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Abstract
The utility model provides a fire-resistant wire harness which comprises a wire harness and a fire-resistant mica tape, wherein the wire harness comprises at least one wire, the wire comprises a wire core and an insulating layer sleeved outside the wire core, the fire-resistant mica tape is wound outside the wire harness and forms a sleeve-shaped fire-resistant layer, the fire-resistant layer comprises at least two winding sections which are connected in sequence, and the two adjacent winding sections are connected and overlap-jointed to form an overlapping part. According to the scheme, the wire is blocked from the external high-temperature environment through the fire-resistant mica tape, wherein two adjacent winding sections of the fire-resistant mica tape are connected and overlap joint is formed with an overlapping part, gaps exist between the winding sections can be avoided, the wound parts of the wire in the wire bundle can be completely covered by the fire-resistant mica tape, and the fire resistance is improved. The utility model also provides a thermal runaway detection device.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a fire-resistant wire harness and thermal runaway detection equipment.
Background
Inside the battery pack there is a device for detecting thermal events, which requires corresponding wires for power supply, communication, etc., and which requires transmission of thermal event alarm signals through the communication wires when the battery pack or system is thermally diffusing due to thermal runaway of the battery.
In the prior art, to mitigate the effect of vibration on the connection stability of wires, the wires are typically bundled and secured into a wire bundle by a simple tie. The wires for power supply or communication and other purposes all comprise an internal wire core and an insulating layer sleeved outside the wire core, when the battery in the battery pack is out of control, the temperature rises suddenly, the insulating layer outside the wires is melted rapidly, and adjacent wires bundled are short-circuited, so that equipment for detecting a thermal event cannot timely transmit an alarm signal of the thermal event, and personal safety hazards of passengers are caused.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
Therefore, the utility model aims to provide a fire-resistant wire harness and thermal runaway detection equipment, which are capable of improving the fire resistance of the wire harness, delaying the melting speed of an insulating layer of a wire, and solving the problem that in the prior art, when a battery is in thermal runaway, equipment for detecting a thermal event is easy to work normally due to the fact that the wire is too fast and short-circuited, so that an alarm signal cannot be transmitted timely.
In a first aspect, the present utility model provides a refractory harness comprising:
the wire bundle comprises at least one wire, wherein the wire comprises a wire core and an insulating layer sleeved outside the wire core;
the fire-resistant mica tape is wound outside the wire bundle and forms a sleeve-shaped fire-resistant layer; the fire-resistant layer comprises at least two winding sections which are connected in sequence, and two adjacent winding sections are connected and overlap-jointed to form an overlapped part.
In one embodiment, the wire bundle includes at least two wires, at least one of which is a communication wire for transmitting an alarm signal, each of the wires being for connecting to a current path.
In one embodiment, one end of the fire-resistant mica tape is a winding start position and the other end of the fire-resistant mica tape is a winding end position along the length direction of the wire bundle; between two adjacent winding sections, a winding section portion near the winding end position wraps the winding section near the winding start position, and the overlapping portion is formed.
In one embodiment, the fire resistant mica tape is a flexible tape-like structure having a consistent bandwidth and a consistent tape thickness, the overlap portion has a width that is one-half the bandwidth of the fire resistant mica tape, and the overlap portion has a thickness that is twice the tape thickness of the fire resistant mica tape.
In one embodiment, the fire resistant mica tape comprises:
a belt body;
the adhesive layer is coated on one side surface of the belt body, which faces the wire bundles, and is connected with the wire bundles in an adhesive mode, and two adjacent winding joints are connected with each other in an adhesive mode through the adhesive layer at the overlapped part.
In one embodiment, the fire resistant mica tape has a bandwidth of 10mm to 60mm.
In one embodiment, the refractory mica tape has a tape thickness of 0.2mm to 2mm.
In one embodiment, two ends of the refractory layer are respectively sleeved with an inner closing-in sleeve.
In one embodiment, a protective sleeve is sleeved on the outer surface of the refractory layer.
In an embodiment, two ends of the protective sleeve are provided with an outer closing-in adhesive tape, one part of the outer closing-in adhesive tape is adhered to the outer surface of the protective sleeve, and the other part of the outer closing-in adhesive tape is adhered to the outer surface of the inner closing-in sleeve.
In a second aspect, the present utility model provides a thermal runaway detection apparatus comprising the refractory harness of any one of the first aspects.
According to the fire-resistant wire harness, the wire harness is wound and bundled through the fire-resistant mica tape, wherein two adjacent winding sections of the fire-resistant mica tape are connected and overlap-joint to form an overlapping part, gaps are avoided among the winding sections, the wound parts of wires in the wire harness can be completely covered by the fire-resistant mica tape, the fire-resistant layer blocks the insulating layer from the external high-temperature environment, the melting progress of the insulating layer is delayed, the fire resistance of the fire-resistant wire harness is improved, the excessive short circuit of the wires caused by excessive melting of the insulating layer is avoided, and the thermal runaway detection equipment can have more sufficient time to detect abnormal high-temperature events and send alarm signals.
The utility model also provides a thermal runaway detection device, which is provided with the fire-resistant wire harness and also has various functional effects of the fire-resistant wire harness.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a refractory harness in the middle of an embodiment of the present utility model;
FIG. 2 is a schematic view of a refractory harness without a protective layer according to an embodiment of the present utility model;
fig. 3 is an enlarged view of a portion a in fig. 2;
FIG. 4 is a schematic view of a winding section according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a portion of an embodiment of the present utility model including one wrapping section and an adjacent wrapping section;
FIG. 6 is an enlarged view of portion B of FIG. 5;
FIG. 7 is a schematic view of the structure of the outer surface of a refractory harness in an embodiment of the present utility model;
FIG. 8 is an expanded schematic view of a fire resistant mica tape according to an embodiment of the present utility model.
In the figure: 1. a wire bundle; 11. a wire; 111. a wire core; 112. an insulating layer; 2. a fire resistant mica tape; 21. a belt body; 211. winding the section; 212. an overlapping portion; 213. winding a starting point position; 214. winding end position; 22. a glue layer; 3. a protective sleeve; 4. an inner closing-in sleeve; 5. and (5) an outer closing adhesive tape.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.
The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.
The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.
As shown in fig. 1 to 8, the refractory harness provided by the embodiment of the utility model comprises a wire harness 1 and a refractory mica tape 2; the wire bundle 1 comprises at least one wire 11, wherein the wire 11 comprises a wire core 111 and an insulating layer 112 sleeved outside the wire core 111; the fire-resistant mica tape 2 is wound outside the wire bundle 1 and forms a sleeve-shaped fire-resistant layer; the refractory layer comprises at least two winding sections 211 which are connected in sequence, and two adjacent winding sections 211 are connected and overlap-jointed to form an overlapping part 212.
In the fire-resistant wire harness of the present utility model, the wire harness 1 is wound and bundled by the fire-resistant mica tape 2, and when the wire harness 1 includes the plurality of wires 11, the plurality of wires 11 of the wire harness 1 are stably fixed together, so that the wires 11 can be prevented from becoming disordered, and the influence of vibration on the connection stability of the wires 11 can be alleviated. The fire-resistant mica tape 2 is wound outside the wire bundle 1 and forms a sleeve-shaped fire-resistant layer; the fire-resistant layer comprises at least two winding sections 211 which are connected in sequence, two adjacent winding sections 211 are connected and overlap-joint to form an overlapping part 212, so that gaps exist between the winding sections 211, the fire-resistant layer which is beneficial to enabling the insulation layer 112 of the wound part of the wire 11 in the wire bundle 1 to be completely covered by the fire-resistant layer made of the fire-resistant mica tape 2 is formed, the fire-resistant layer blocks the insulation layer 112 from the external high-temperature environment, the melting progress of the insulation layer 112 is delayed, the fire resistance of the fire-resistant wire bundle is improved, the short circuit between the adjacent wires 11 caused by rapid melting of the insulation layer 112 is avoided, and the thermal runaway detection equipment can have more sufficient time to detect abnormal high-temperature events and send an alarm signal.
As an embodiment, as shown in fig. 1, the wire bundle 1 includes at least two wires 11, and at least one of the wires is a communication wire for transmitting an alarm signal, and each wire 11 is used for connecting one current path.
As an embodiment, as shown in fig. 2 to 4, along the length direction L of the wire harness 1, one end of the fire-resistant mica tape 2 is a winding start position 213 and the other end is a winding end position 214, and between two adjacent winding sections 211, the winding section 211 near the winding end position 214 partially covers the winding section 211 near the winding start position 213, and an overlapping portion 212 is formed.
Wherein, the end of fire-resistant mica tape 2 that first contacts with wire bundle 1 is winding start point position 213, along the length direction L of wire bundle 1, fire-resistant mica tape 2 twines in the surface of wire bundle 1 with certain angle slope, and until the winding finishes, fire-resistant mica tape 2 last one end that contacts with wire bundle 1 is winding end point position 214. As shown in fig. 4, the fire resistant mica tape 2 is formed into one winding section 211 per one winding turn around the bundle of wires 1, and each winding section 211 itself does not generate the overlapping portion 212. As shown in fig. 2, 3 and 5, between two connected winding sections 211, the winding section 211 of the rear winding is overlapped on the winding section 211 of the front winding and an overlapped part 212 is formed, so that no gap is generated between two adjacent winding sections 211, and the insulating layer 112 of each wire 11 can be wrapped inside, thereby effectively preventing the insulating layer 112 from being exposed to high temperature environment.
As one embodiment, as shown in fig. 5 and 6, the fire-resistant mica tape 2 is a flexible tape-like structure having a uniform tape width W1 and a uniform tape thickness D1, and the width W2 of the overlapping portion 212 satisfies: 0 < W2.ltoreq.W1, the thickness D2 of the overlap portion 212 satisfying: d2 =nd1, n is a positive integer.
As an embodiment, as shown in fig. 5 and 6, the width W2 of the overlapped portion 212 is one half of the width W1 of the fire-resistant mica tape 2, and the thickness D2 of the overlapped portion 212 is twice the tape thickness D1 of the fire-resistant mica tape 2.
Wherein each winding section 211 has an overlapping ratio of 50% with another winding section 211 connected thereto and an overlapping portion 212 is formed such that a thickness D2 of the overlapping portion 212 is twice a belt thickness D1 of the fire-resistant mica belt 2 and adjacent overlapping portions 212 abut against each other. Thus, the wire bundle 1 can be uniformly covered by the two layers of the winding knots 211, and the fire-resistant mica tape 2 wound at each position is two layers, and the thickness is the same, so that the fire resistance can be improved, and the problem of poor fire resistance at the thinner winding position due to uneven winding can be avoided.
As an embodiment, as shown in fig. 1 to 3, the fire-resistant mica tape 2 includes a tape body 21 and a glue layer 22, the glue layer 22 is coated on a surface of the tape body 21 facing the wire bundle 1, the glue layer 22 is adhesively connected with the wire bundle 1, and two adjacent winding sections 211 are adhesively connected at the overlapping portion 212 by the glue layer 22. The belt body 21 is formed by dipping high-quality silicone resin and glass cloth reinforced mica paper, has good high-temperature resistance, and can effectively isolate the insulating layer 112 of the lead 11 from the external high-temperature environment.
During the winding of the fire-resistant mica tape 2, the inner side surface of the winding section 211 of the subsequent winding can be adhesively fixed to the outer side surface of the winding section 211 of the preceding winding by means of the adhesive layer 22, so that the adjacent two winding sections 211 are relatively fixed. The winding section 211 can be prevented from moving relative to the wire harness 1 in the transportation or installation process, so that the winding section 211 wound later cannot cover the winding section 211 wound earlier, and further gaps are formed between two adjacent winding sections 211, and the insulating layer 112 of the wire 11 is prevented from being exposed and affecting the fire resistance of the fire-resistant wire harness.
Thus, in a thermal runaway scenario, the thermal runaway detection device is able to have more sufficient time to transmit an alarm signal through the refractory harness.
As an embodiment, as shown in FIG. 8, the fire resistant mica tape 2 has a bandwidth W1 of 10mm to 60mm. For example, 10-15mm, 15-20mm, 20-25mm, 25-30mm, 30-40mm, 38.5-40mm, 40-50mm, 50-55mm, 55-60mm, or 60mm, etc. Within this width range, the width W1 of the fire-resistant mica tape 2 is not so narrow as to be wound a plurality of times, thereby increasing the cost and winding man-hour, and is not so wide as to be inconvenient to wind.
As an embodiment, as shown in FIG. 8, the refractory mica tape 2 has a tape thickness D1 of 0.2mm to 2mm. For example, 0.2-0.545mm, 0.545-0.8mm, 0.8-1.0mm, 1.0-1.2mm, 1.2-1.5mm, 1.5-1.55mm, 1.55-2.0mm, etc. Within this thickness range, the belt thickness D1 of the fire-resistant mica belt 2 is not too thin to affect fire resistance, nor too thick to be wound inconveniently.
As an embodiment, as shown in fig. 1 and 2, two ends of the refractory layer are respectively sleeved with an inner closing sleeve 4, and the inner closing sleeves 4 are used for fixing two ends of the refractory mica tape 2. Wherein, the inner receiving mouth sleeve 4 is a sleeve made of PVC (Polyvinyl chloride ) material, and tightly covers the two ends of the fire-resistant mica tape 2, so that the two ends of the fire-resistant mica tape 2 can be prevented from degumming to expose the insulating layer 112 of the lead 11, and the insulating layer 112 is prevented from being exposed to influence the fire resistance of the fire-resistant wire harness.
As an embodiment, as shown in fig. 1 and 7, the outer surface of the refractory layer is sleeved with a protective sleeve 3, and the protective sleeve 3 is used for protecting the refractory mica tape 2. The protective sleeve 3 is made of wear-resistant textile materials, preferably PET (polyethylene terephthalate ) textile sleeves, has good mechanical properties and folding resistance, can effectively protect the inside fire-resistant mica tape 2 in various scenes such as transportation and installation, and effectively prevents the fire-resistant mica tape 2 from being worn.
As an embodiment, as shown in fig. 2 and 7, two ends of the protective sleeve 3 are provided with an outer closing adhesive tape 5, and one part of the outer closing adhesive tape 5 is adhered to the outer surface of the protective sleeve 3, and the other part is adhered to the outer surface of the inner closing sleeve 4. The outer closing-in adhesive tape 5 is a PVC adhesive tape, and can stably fix the protective sleeve 3 and the inner closing-in sleeve 4.
As one embodiment, the refractory mica tape 2 has a tape thickness D1 of 0.2mm and a tape width W1 of 20mm. The tape body 21 of the fire-resistant mica tape 2 is composed of mica paper reinforced by dipping high quality silicone resin and glass cloth, the breakdown voltage is more than or equal to 2.7kV, the thermal conductivity is less than or equal to 0.2W/m.K, and the mica content is more than or equal to 160g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The tensile strength of the fire-resistant mica tape 2 is more than or equal to 200N/cm. The inner closing-in sleeve 4 is a sleeve made of PVC, the outer closing-in adhesive tape 5 is a PVC adhesive tape, the outer diameter of the wire bundle 1 wound with the fire-resistant mica tape 2 is less than or equal to 10mm, and the protective sleeve 3 is a textile sleeve made of PET. Experiments prove that the fire-resistant wire harness with the characteristics can resist for 5 minutes at the flame temperature of 1200 ℃ without short circuit caused by melting of the insulating layer 112, can meet the time of 5 minutes specified by regulations, provides power supply and communication guarantee for thermal runaway detection equipment, and ensures that an alarm signal of a battery thermal runaway event can be smoothAnd (5) transmission.
In addition, the utility model also provides a thermal runaway detection device, which is provided with all the technical characteristics of the refractory wire harness. In a thermal runaway scenario, the thermal runaway detection device is able to have more sufficient time to transmit an alarm signal through the refractory harness. The component for detecting in the thermal runaway detection device can be selected from devices of a fire detection sensor, a smoke detector, a thermal runaway detector, a fire extinguishing controller and the like in the prior art, which receive a thermal runaway signal and respond.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.
Claims (11)
1. A fire resistant wire harness, comprising:
the wire bundle (1) comprises at least one wire (11), wherein the wire (11) comprises a wire core (111) and an insulating layer (112) sleeved outside the wire core (111);
the fire-resistant mica tape (2), the fire-resistant mica tape (2) is wound outside the wire bundle (1) and forms a sleeve-shaped fire-resistant layer; the refractory layer comprises at least two winding sections (211) which are connected in sequence, wherein two adjacent winding sections (211) are connected and overlap-jointed to form an overlapping part (212).
2. Refractory harness according to claim 1, characterized in that the harness (1) comprises at least two wires (11), at least one of which is a communication wire for transmitting alarm signals, each wire (11) being intended to be connected to a current path.
3. Refractory harness according to claim 1, characterized in that, along the length direction (L) of the harness (1), one end of the refractory mica tape (2) is a winding start position (213) and the other end is a winding end position (214); between two adjacent winding sections (211), a winding section (211) near the winding end position (214) partially wraps the winding section (211) near the winding start position (213), and the overlapping portion (212) is formed.
4. Refractory harness according to claim 1, characterized in that the refractory mica tape (2) is a flexible tape-like structure with a uniform tape width (W1) and a uniform tape thickness (D1), the width (W2) of the overlapping portion (212) being one half the tape width (W1) of the refractory mica tape (2), the thickness (D2) of the overlapping portion (212) being twice the tape thickness (D1) of the refractory mica tape (2).
5. Refractory harness according to claim 1, characterized in that the refractory mica tape (2) comprises:
a belt body (21);
glue film (22), glue film (22) coating in the area body (21) orientation one side surface of lead bundle (1), glue film (22) with lead bundle (1) bonding links to each other, two adjacent winding festival (211) are in overlap portion (212) department is passed through glue film (22) bonding links to each other.
6. Refractory harness according to claim 1, characterized in that the bandwidth (W1) of the refractory mica tape (2) is 10mm-60mm.
7. Refractory harness according to claim 1, characterized in that the thickness (D1) of the refractory mica tape (2) is 0.2mm-2mm.
8. Refractory harness according to any one of claims 1-7, characterized in that the two ends of the refractory layer are each provided with an inner jacket (4).
9. Refractory harness according to claim 8, characterized in that the outer surface of the refractory layer is sheathed with a protective sheath (3).
10. Refractory harness according to claim 9, characterized in that the two ends of the protective sheath (3) are provided with an outer closing-in adhesive tape (5), a part of the outer closing-in adhesive tape (5) being adhered to the outer surface of the protective sheath (3) and another part being adhered to the outer surface of the inner closing-in sheath (4).
11. A thermal runaway detection apparatus comprising the refractory harness according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321286327.0U CN219575227U (en) | 2023-05-24 | 2023-05-24 | Refractory harness and thermal runaway detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321286327.0U CN219575227U (en) | 2023-05-24 | 2023-05-24 | Refractory harness and thermal runaway detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219575227U true CN219575227U (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321286327.0U Active CN219575227U (en) | 2023-05-24 | 2023-05-24 | Refractory harness and thermal runaway detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219575227U (en) |
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2023
- 2023-05-24 CN CN202321286327.0U patent/CN219575227U/en active Active
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