Heating film, battery and electric device
By setting the wiring harness pads and buffer holes in the heating film, the problem of insufficient stress in the existing heating film is solved, and higher bonding reliability and lower production costs are achieved.
Patent Information
- Application Number
- CN202420036476.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-05
AI Technical Summary
The existing heating films have insufficient stress at the welding wire positions in the battery cell group, resulting in poor bonding, dry burning and damage to the heating film, increasing production costs and waste materials.
A heating film is designed, and its wiring harness pad is arranged in the heating film body, and the lead-out area of the wiring harness does not exceed the range of the heating film body, and the expansion force of the battery is absorbed through the buffer hole to reduce fixing points and production waste.
It effectively improves the wire harness stress at the welding line position of the heating film, optimizes the bonding reliability, reduces manufacturing and production costs, and extends the service life of the heating film.
Smart Images
Figure CN222441890U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of battery technology, and in particular relates to a heating film, a battery and an electrical device. Background Art
[0002] Existing batteries are usually equipped with heating films to heat battery cells in cold environments. During the production of the heating films, the leads can be welded to the chips in the heating films through the wire harness pads. In related technologies, the wire harness pads extend to both ends of the main area of the heating film and protrude outwards. However, using this structure requires additional fixing points or a suspended design in the arrangement of the battery cell group.
[0003] The design scheme of adding fixed points will increase the manufacturing cost; while the design scheme of suspension will cause local dry burning due to poor bonding in the case of vibration or stress on the wiring harness, and the stress of the wiring harness will also cause tearing and damage at the outlet position of the heating film, resulting in arcing and burning of the heating film, and then dry burning of the heating film and damaged arcing at the outlet position of the heating film will cause thermal runaway of the battery pack; in addition, the protruding outlet position of the heating film will result in a large amount of heating film production waste, which is not conducive to cost control of the heating film. Utility Model Content
[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heating film, a battery and an electrical device, which effectively improve the wire stress at the welding line position of the heating film, optimize the reliability of the heating film bonding, reduce the fixing points of the heating film, reduce the production waste of the heating film, and reduce the production cost of the heating film.
[0005] In a first aspect, the present application provides a heating film, comprising:
[0006] A heating film body, wherein the heating film body is used to be attached to the first surface of the battery cell group;
[0007] A wiring harness pad, wherein the wiring harness pad is arranged on the heating film body, and the projection of the wiring harness pad on the first surface is located within the first surface;
[0008] A wire harness is connected to the wire harness pad.
[0009] According to the heating film of the present application, through the setting of the above-mentioned wire harness pad and wire harness, the lead-out area of the wire harness does not exceed the range of the heating film body. Compared with the solution of suspended pad design, the wire harness stress at the welding line position of the heating film is effectively improved, and the reliability of the heating film bonding is optimized; at the same time, the fixing points of the heating film are reduced, the number of battery components is reduced, thereby reducing manufacturing costs; and the production waste of the heating film is reduced, further reducing the production cost of the heating film.
[0010] According to an embodiment of the present application, the heating film body is provided with a plurality of buffer holes, the plurality of buffer holes extend along a first direction, and the plurality of buffer holes are arranged at intervals along a second direction, and the first direction intersects with the second direction.
[0011] According to the heating film of the present application, through the setting of the above-mentioned multiple buffer holes, when the multiple battery cells expand due to heat, the multiple buffer holes can utilize deformation to absorb most of the expansion force, preventing the expansion force from laterally pulling the heating film body and causing the heating film body to tear, thereby improving the safety performance and reliability of the entire heating film, and further extending the service life of the entire heating film.
[0012] According to one embodiment of the present application, the extension lines of the buffer holes along the first direction divide the heating film body into a plurality of sub-areas, each of the sub-areas is used to correspond to a battery cell, and the wiring harness pad is located between the extension lines of the buffer holes along the first direction at both ends.
[0013] According to an embodiment of the present application, the wiring harness pad is disposed in the second sub-region along the second direction; and / or the wiring harness pad is disposed in the second to last sub-region along the second direction.
[0014] According to the heating film of the present application, through the structural design in which the above-mentioned wiring harness pads are symmetrically arranged in the second sub-area and the penultimate sub-area along the second direction, compared with the scheme in which the wiring harness pads are arranged in the first sub-area 1 and / or the penultimate sub-area along the second direction, it is possible to prevent the wiring harness from being too short and causing excessive wiring harness stress to directly tear the heating film, thereby effectively improving the wiring harness stress and further optimizing the reliability of the heating film bonding.
[0015] According to an embodiment of the present application, at least a portion of the wiring harness pad is disposed opposite to the buffer hole in the second direction, and the remaining portion extends outside the buffer hole along the first direction.
[0016] According to the heating film of the present application, through the relative position design of the wiring harness pad and the buffer hole, at least part of the wiring harness pad can fall between the buffer holes on both sides, alleviating the pulling effect of the wiring harness stress on the buffer holes, thereby enhancing the structural strength of the heating film, and at the same time reducing the width of the heating film as much as possible, saving production costs.
[0017] According to an embodiment of the present application, the wiring harness pad includes two wire harness pads that are separated from each other, and the two wire harness pads are arranged at the edge of the heating film body.
[0018] According to an embodiment of the present application, the two wiring harness pads are located on the same edge of the heating film body along the second direction.
[0019] According to an embodiment of the present application, the two harness pads are respectively arranged at positions close to two ends of the edge along the second direction.
[0020] According to the heating film of the present application, the two wiring harness pads are designed to be far away from each other to prevent the two wiring harness pads from being too close together, which may cause the positive and negative ends to be too close and cause a short circuit, thereby minimizing the risk of failure and short circuit of the wiring harness in one direction, reducing the failure rate of the heating film, and thus comprehensively optimizing the working performance of the heating film, while significantly shortening the length of the wiring harness and achieving cost control.
[0021] In a second aspect, the present application provides a battery, the battery comprising:
[0022] A battery cell group, wherein the battery cell group includes a plurality of battery cells;
[0023] As any of the above-mentioned heating films, the heating film is attached to the first surface of the battery cell group.
[0024] According to the battery of the present application, through the setting of the above-mentioned heating film, the lead-out area of the wiring harness does not exceed the range of the heating film body. Compared with the solution of suspended pad design, the wiring harness stress at the welding wire position of the heating film is effectively improved, and the reliability of the heating film bonding is optimized; at the same time, the fixing points of the heating film are reduced, the number of battery components is reduced, thereby reducing manufacturing costs; and the production waste of the heating film is reduced, further reducing the production cost of the heating film.
[0025] In a third aspect, the present application provides an electrical device, the electrical device comprising:
[0026] As above mentioned battery.
[0027] According to the electrical device of the present application, through the arrangement of the above-mentioned battery, the lead-out area of the wiring harness does not exceed the range of the heating film body. Compared with the solution of suspended pad design, the wiring harness stress at the welding wire position of the heating film is effectively improved, and the reliability of the heating film bonding is optimized; at the same time, the fixing points of the heating film are reduced, the number of battery components is reduced, thereby reducing manufacturing costs; and the production waste of the heating film is reduced, further reducing the production cost of the heating film.
[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0030] Figure 1is a schematic diagram of the structure of the heating film provided in an embodiment of the present application;
[0031] Figure 2 is a front view of a heating film provided in an embodiment of the present application;
[0032] Figure 3 It is a side view of the heating film provided in an embodiment of the present application.
[0033] Reference numerals:
[0034] A heating film 100 , a heating film body 110 , a buffer hole 111 , a sub-region 112 , a wiring harness pad 120 , and a wiring harness 130 . DETAILED DESCRIPTION
[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0036] The present application discloses a heating film 100 .
[0037] Reference below Figure 1-Figure 3 A heating film 100 according to an embodiment of the present application is described.
[0038] In some embodiments, Figure 1-Figure 3 As shown, the heating film 100 is applied to a battery, and the heating film 100 includes: a heating film body 110 , a wiring harness pad 120 and a wiring harness 130 .
[0039] The heating film body 110 is used to be attached to the first surface of the battery cell group; the wiring harness pad 120 is arranged on the heating film body 110, and the projection of the wiring harness pad 120 on the first surface is located within the first surface; the wiring harness 130 is connected to the wiring harness pad 120.
[0040] The heating film body 110 may include multiple layers, such as a thermal conductive layer, a heat-generating layer, an insulating layer, and a flame-retardant layer. The multi-layer structure may be compounded into the heating film body 110. The battery cell group may include multiple battery cells stacked along the thickness direction. The heating film body 110 may be adhered to the first surface of the battery cell group along the thickness direction of the multiple battery cells.
[0041] The harness pad 120 may be a surface mount pad or a through hole pad, for example, in some embodiments, Figure 1-Figure 3 As shown, the harness pad 120 is a surface mount pad.
[0042] The wiring harness pad 120 can be a pin in the package of the heating film 100, which is used to connect to the heating chip in the heating film body 110 and the wiring harness 130. The material of the wiring harness pad 120 can be aluminum, copper or gold, etc., and the material of the wiring harness 130 can be aluminum, copper or gold, etc., and there is no limitation here.
[0043] The bonding method of the harness pad 120 and the harness 130 may be ball bonding or wedge bonding, etc., which is not limited here.
[0044] In actual implementation, Figure 1-Figure 3 As shown, solder or other welding materials can be used to connect the pins of the heating chip in the heating film body 110 with the wiring harness pad 120, and the wiring harness 130 can be welded to the wiring harness pad 120 by solder. Under the action of high temperature, the wiring harness 130 and the wiring harness pad 120 can form a metallurgical bond and complete the welding process, thereby realizing the electrical connection between the wiring harness 130 and the heating chip. After the heating film body 110 is adhered to the first side of the battery cell group by thermally conductive glue or other adhesives, the wiring harness pad 120 located on the heating film body 110 can be indirectly adhered to the first side of the battery cell group without the need to fix the wiring harness pad 120 separately.
[0045] The heating film 100 provided in the embodiment of the present application, through the arrangement of the above-mentioned wire harness pad 120 and the wire harness 130, makes the lead-out area of the wire harness 130 do not exceed the range of the heating film body 110. Compared with the solution of suspended pad design, the wire harness stress at the welding line position of the heating film 100 is effectively improved, and the reliability of the bonding of the heating film 100 is optimized; at the same time, the fixing points of the heating film 100 are reduced, the number of battery components is reduced, thereby reducing the manufacturing cost; and the production waste of the heating film 100 is reduced, further reducing the production cost of the heating film 100.
[0046] In some embodiments, Figure 1-Figure 2 As shown, the heating film body 110 may be provided with a plurality of buffer holes 111 , the plurality of buffer holes 111 may extend along a first direction, and the plurality of buffer holes 111 may be spaced apart and arranged along a second direction, and the first direction and the second direction may intersect.
[0047] Here, “multiple” means 2 or more. For example, in some embodiments, the heating film body 110 is provided with 20 buffer holes 111 .
[0048] In this embodiment, if Figure 1-Figure 2 As shown, the first direction may be the width direction of the heating film 100 , the second direction may be the length direction of the heating film 100 , and the first direction may be perpendicular to the second direction.
[0049] In some other embodiments, the first direction and the second direction may form an acute angle.
[0050] In some further embodiments, the first direction and the second direction may be parallel.
[0051] It is understandable that if the heating film body is not provided with buffer holes, based on the principle of thermal expansion and contraction, multiple battery cells will expand to varying degrees when heated, and the expanded battery cells will laterally pull the heating film attached to the first surface, causing the heating film body to tear under the action of the expansion force.
[0052] When the heating film body 110 is provided with a plurality of buffer holes 111, when a plurality of battery cells expand due to heat, the plurality of buffer holes 111 can utilize deformation to absorb most of the expansion force, thereby preventing the expansion force from laterally pulling the heating film body 110 and causing the heating film body 110 to tear, thereby improving the safety performance and reliability of the entire heating film 100, and further extending the service life of the entire heating film 100.
[0053] In some embodiments, Figure 1-Figure 2 As shown, each buffer hole 111 can divide the heating film body 110 into multiple sub-areas 112 along the extension line of the first direction, each sub-area 112 can be used to correspond to a battery cell, and the wiring harness pad 120 can be located between the extension lines of the buffer holes 111 at both ends along the first direction.
[0054] Here, “a plurality” means 2 or more. For example, in some embodiments, each buffer hole 111 can divide the heating film body 110 into 20 sub-areas 112 along the extension line of the first direction.
[0055] In this embodiment, if Figure 1-Figure 2 As shown, buffer holes 111 can be provided at positions on the heating film body 110 that are opposite to the gaps between two adjacent battery cells. The buffer holes 111 can be in the shape of long strips. When multiple battery cells are heated and expanded, the portions of the heating film 100 that are in contact with each battery cell are pulled outwards under the action of the expansion force, so that the two sides of the buffer holes 111 move inwards, and the buffer holes 111 are deformed to absorb part of the expansion force.
[0056] It is understandable that if the buffer hole is not opposite to the gap between two adjacent battery cells, in other words, multiple buffer holes are directly arranged opposite to the ends of each battery cell, during the process of thermal expansion of multiple battery cells, the parts of the heating film that are in contact with each battery cell are pulled outward under the action of the expansion force, causing the two sides of the buffer hole to expand outward, resulting in the ends of the battery cell being directly exposed from the buffer hole. At this time, the contact area between the heating film and the battery cell is greatly reduced, seriously affecting the heating efficiency of the heating film.
[0057] When the buffer hole 111 is positioned relative to the gap between two adjacent battery cells, the expansion force is prevented from pulling the heating film body 110 laterally and causing the heating film body 110 to tear, thereby improving the safety performance and reliability of the entire heating film 100, while not affecting the heating surface area of the heating film 100 and the battery cell group, thereby ensuring the heating effect of the heating film 100 and the temperature rise rate of the battery cell in a low temperature environment, and the position of the buffer hole 111 avoids the structural design that is directly opposite to the end of the battery cell, which is convenient for processing and assembly.
[0058] In some embodiments, Figure 1-Figure 2 As shown, the harness pad 120 may be disposed in the second sub-region 112 along the second direction; and / or, the harness pad 120 may be disposed in the second to last sub-region 112 along the second direction.
[0059] The wiring harness pad 120 may be in at least one of the following structural forms:
[0060] First, the incoming and outgoing lines are arranged separately.
[0061] In this embodiment, if Figure 1-Figure 2 As shown, the harness pad 120 can be arranged in the second sub-area 112 and the penultimate sub-area 112 along the second direction. In other words, the position of the harness pad 120 for the incoming line and the position of the harness pad 120 for the outgoing line can correspond to the positions of the second battery cell and the penultimate battery cell along the second direction, respectively.
[0062] In other embodiments, the harness pad 120 may be disposed in the third sub-region 112 and the third-to-last sub-region 112 along the second direction.
[0063] In some further embodiments, the harness pad 120 may be disposed in the second sub-region 112 and the third to last sub-region 112 along the second direction.
[0064] Second, the incoming and outgoing lines are arranged centrally.
[0065] In this embodiment, the wiring harness pad 120 for the incoming line and the wiring harness pad 120 for the outgoing line can both be arranged in the second sub-area 112 along the second direction. In other words, the wiring harness pad 120 for the incoming line and the wiring harness pad 120 for the outgoing line can both correspond to the second battery cell position along the second direction.
[0066] In other embodiments, the wiring harness pad 120 for incoming lines and the wiring harness pad 120 for outgoing lines can both be arranged in the second sub-area 112 along the second direction. In other words, the wiring harness pad 120 for incoming lines and the wiring harness pad 120 for outgoing lines can both correspond to the second battery cell position along the second direction.
[0067] In some further embodiments, the harness pad 120 for incoming wires and the harness pad 120 for outgoing wires may both be disposed in the third sub-region 112 along the second direction.
[0068] In some further embodiments, the harness pad 120 for incoming wires and the harness pad 120 for outgoing wires may both be disposed in the third to last sub-region 112 along the second direction.
[0069] The heating film 100 provided in the embodiment of the present application, through the structural design in which the above-mentioned harness pads 120 are symmetrically arranged in the second sub-area 112 and the penultimate sub-area 112 along the second direction, compared with the solution in which the harness pads 120 are arranged in the first sub-area 112 and / or the penultimate sub-area 112 along the second direction, prevents the harness 130 from being too short and causing excessive harness stress to directly tear the heating film 100, thereby effectively improving the harness stress and further optimizing the reliability of the bonding of the heating film 100.
[0070] In some embodiments, Figure 1-Figure 2 As shown, at least a portion of the harness pad 120 may be disposed opposite to the buffer hole 111 in the second direction, and the remaining portion may extend to the outside of the buffer hole 111 along the first direction.
[0071] The shape of the wiring harness pad 120 may include, but is not limited to, a square, a circle, an island, a teardrop, a polygon, or an ellipse. For example, in some embodiments, Figure 1-Figure 2 As shown, the harness pad 120 is square in shape.
[0072] In this embodiment, if Figure 1-Figure 2 As shown, the buffer hole 111 may be in a strip shape, at least a portion of the wiring harness pad 120 may be located in the area between the buffer holes 111 on both sides, and the other portion of the wiring harness pad 120 may protrude out of the area between the buffer holes 111 on both sides.
[0073] In other embodiments, the entire wiring harness pad 120 may be disposed opposite to the buffer hole 111 in the second direction.
[0074] In still other embodiments, the entire harness pad 120 may be disposed apart from the buffer hole 111 in the first direction.
[0075] The heating film 100 provided in the embodiment of the present application, through the relative position design of the above-mentioned wiring harness pad 120 and the buffer hole 111, allows at least a portion of the wiring harness pad 120 to fall between the buffer holes 111 on both sides, thereby alleviating the pulling effect of the wiring harness stress on the buffer hole 111, thereby enhancing the structural strength of the heating film 100, and at the same time reducing the width of the heating film 100 as much as possible, saving production costs.
[0076] In some embodiments, Figure 1-Figure 2 As shown, the harness pad 120 may include two harness pads 120 that are separated from each other, and the two harness pads 120 may be arranged at the edge of the heating film body 110 .
[0077] In this embodiment, if Figure 1-Figure 2 As shown, two harness pads 120 may be arranged at the edge of the heating film body 110 along the second direction, wherein one harness pad 120 may be used for incoming wires, and the other harness pad 120 may be used for outgoing wires.
[0078] In other embodiments, two harness pads 120 may be arranged at the edge of the heating film body 110 along the first direction, wherein one harness pad 120 may be used for incoming wires, and the other harness pad 120 may be used for outgoing wires.
[0079] The first direction may be a width direction of the heating film 100 , the second direction may be a length direction of the heating film 100 , and the first direction may be perpendicular to the second direction.
[0080] The heating film 100 provided in the embodiment of the present application realizes the introduction and extraction of the heating film 100 wiring harness 130 through the position arrangement of the above-mentioned two wiring harness pads 120. It does not need to be fixed separately and does not need to be fixed and constrained to be suspended in the air, thereby reducing the number of battery components and thus reducing manufacturing costs. At the same time, it further improves the wiring harness stress to reduce the tearing of the heating film 100 by the wiring harness 130, thereby reducing the probability of dry burning caused by poor bonding of the heating film 100.
[0081] In some embodiments, Figure 1-Figure 2 As shown, the two harness pads 120 may be located at the same edge of the heating film body 110 along the second direction.
[0082] In this embodiment, if Figure 1-Figure 2 As shown, the heating film body 110 can be a rectangle, that is, the heating film body 110 can have a first edge, a second edge, a third edge and a fourth edge connected in sequence end to end, the first edge and the third edge can be arranged opposite to each other, and the first edge and the third edge can extend along the first direction, the second edge and the fourth edge can be arranged opposite to each other, and the second edge and the fourth edge can extend along the second direction, the two wiring harness pads 120 can be both located at the second edge of the heating film body 110, or the two wiring harness pads 120 can be both located at the fourth edge of the heating film body 110.
[0083] In other embodiments, the two harness pads 120 may be both located at the first edge of the heating film body 110 , or the two harness pads 120 may be both located at the third edge of the heating film body 110 .
[0084] In some further embodiments, one of the harness pads 120 may be located at the second edge of the heating film body 110 , and another of the harness pads 120 may be located at the fourth edge of the heating film body 110 .
[0085] In some further embodiments, one of the harness pads 120 may be located at a first edge of the heating film body 110 , and another of the harness pads 120 may be located at a third edge of the heating film body 110 .
[0086] The heating film 100 provided in the embodiment of the present application is designed so that the two wiring harness pads 120 are located on the same edge. Compared with the solution in which the two wiring harness pads 120 are located on different edges, the heating film body 110 only needs to leave space on one edge for installing the wiring harness pad 120, thereby minimizing the overall size of the heating film 100, saving production costs, and at the same time reducing production waste of the heating film 100 and lowering the production cost of the heating film 100.
[0087] In some embodiments, Figure 1-Figure 2 As shown, the two harness pads 120 may be respectively arranged at positions close to both ends of the edge along the second direction.
[0088] In this embodiment, if Figure 1-Figure 2 As shown, the heating film body 110 can be a rectangle, that is, the heating film body 110 can have a first edge, a second edge, a third edge and a fourth edge connected in sequence end to end, the first edge and the third edge can be arranged opposite to each other, and the first edge and the third edge can extend along the first direction, the second edge and the fourth edge can be arranged opposite to each other, and the second edge and the fourth edge can extend along the second direction, the two wiring harness pads 120 can be located at the second edge of the heating film body 110, or, the two wiring harness pads 120 can be located at the fourth edge of the heating film body 110, preferably, the two wiring harness pads 120 can be respectively arranged in the second sub-area 112 and the penultimate sub-area 112 along the second direction.
[0089] In other embodiments, one of the wiring harness pads 120 may be located at a second edge of the heating film body 110 close to the first end, and the other wiring harness pad 120 may be located at a fourth edge of the heating film body 110 close to the second end. Preferably, the two wiring harness pads 120 may be respectively arranged in the second sub-area 112 and the penultimate sub-area 112 along the second direction.
[0090] The heating film 100 provided in the embodiment of the present application prevents the two wiring harness pads 120 from being too close together, causing the positive and negative ends to be too close to each other and causing a short circuit, by designing the two wiring harness pads 120 to be far away from each other. This minimizes the risk of failure and short circuit of the wiring harness 130 in one direction, reduces the failure rate of the heating film 100, and comprehensively optimizes the working performance of the heating film 100. At the same time, it significantly shortens the length of the wiring harness 130, thereby achieving cost control.
[0091] The application also discloses a battery.
[0092] In some embodiments, the battery includes: a battery cell group and any one of the heating films 100 described above.
[0093] The battery cell group includes a plurality of battery cells; the heating film 100 is attached to a first surface of the battery cell group.
[0094] A plurality of battery cells may be stacked in a thickness direction, a length direction of the heating film body 110 may be parallel to a stacking direction of the plurality of battery cells, and the first surface may be a stacking surface of the battery cell group.
[0095] The battery cells mentioned in the embodiments of the present application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., which are not limited in the embodiments of the present application. The battery cells may be cylindrical, flat, rectangular or other shapes, etc., which are not limited in the embodiments of the present application. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.
[0096] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
[0097] The battery provided in the embodiment of the present application, through the setting of the above-mentioned heating film 100, makes the lead-out area of the wire harness 130 do not exceed the range of the heating film body 110. Compared with the solution of suspended pad design, the wire harness stress at the welding line position of the heating film 100 is effectively improved, and the reliability of the bonding of the heating film 100 is optimized; at the same time, the fixing points of the heating film 100 are reduced, the number of parts of the battery is reduced, thereby reducing the manufacturing cost; and the production waste of the heating film 100 is reduced, further reducing the production cost of the heating film 100.
[0098] The application also discloses an electrical device.
[0099] In some embodiments, the electrical device includes: a battery as described above.
[0100] The battery disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery thermal management system disclosed in the present application and batteries etc. can be used to form the electrical device, which is conducive to improving the scope of application of the battery thermal management system and reducing the difficulty of assembling the battery thermal management system.
[0101] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.
[0102] Taking a vehicle as an example of an electrical device in one embodiment of the present application, the vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor, a controller and a battery may be arranged inside the vehicle, and the controller is used to control the battery to power the motor. For example, a battery may be arranged at the bottom, front or rear of the vehicle. The battery can be used to power the vehicle, for example, the battery can be used as the operating power supply of the vehicle, for the circuit system of the vehicle, for example, for the working power demand during the start-up, navigation and operation of the vehicle. In another embodiment of the present application, the battery can not only be used as the operating power supply of the vehicle, but also as the driving power supply of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.
[0103] The electrical device provided in the embodiment of the present application, through the arrangement of the above-mentioned battery, makes the lead-out area of the wiring harness 130 do not exceed the range of the heating film body 110. Compared with the solution of suspended pad design, the wiring harness stress at the welding wire position of the heating film 100 is effectively improved, and the reliability of the bonding of the heating film 100 is optimized; at the same time, the fixing points of the heating film 100 are reduced, the number of battery components is reduced, thereby reducing the manufacturing cost; and the production waste of the heating film 100 is reduced, further reducing the production cost of the heating film 100.
[0104] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.
[0105] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0106] In the description of this application, "first feature" or "second feature" may include one or more of the features.
[0107] In the description of the present application, “plurality” means two or more.
[0108] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.
[0109] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0111] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A heating film, applied to a battery, characterized in that: include: A heating film body, wherein the heating film body is used to be attached to the first surface of the battery cell group; A wiring harness pad, wherein the wiring harness pad is arranged on the heating film body, and the projection of the wiring harness pad on the first surface is located within the first surface; A wire harness is connected to the wire harness pad.
2. The heating film according to claim 1, characterized in that: The heating film body is provided with a plurality of buffer holes, the plurality of buffer holes extend along a first direction, and the plurality of buffer holes are arranged at intervals along a second direction, and the first direction intersects with the second direction.
3. The heating film according to claim 2, characterized in that: The extension lines of the buffer holes along the first direction divide the heating film body into a plurality of sub-areas, each of the sub-areas is used to correspond to a battery cell, and the wiring harness pads are located between the extension lines of the buffer holes along the first direction at both ends.
4. The heating film according to claim 3, characterized in that: The wiring harness pad is arranged in the second sub-area along the second direction; and / or, The harness pad is disposed in the penultimate sub-region along the second direction.
5. The heating film according to claim 3, characterized in that: At least a portion of the wiring harness pad is disposed opposite to the buffer hole in the second direction, and the remaining portion extends outside the buffer hole along the first direction.
6. The heating film according to any one of claims 1 to 5, characterized in that: The harness pads include two that are separated from each other, and the two harness pads are arranged at the edge of the heating film body.
7. The heating film according to claim 6, characterized in that: The two harness pads are located on the same edge of the heating film body along the second direction.
8. The heating film according to claim 7, characterized in that: The two harness pads are respectively arranged at positions close to two ends of the edge along the second direction.
9. A battery, characterized in that: include: A battery cell group, wherein the battery cell group includes a plurality of battery cells; The heating film according to any one of claims 1 to 8, wherein the heating film is attached to the first surface of the battery cell group.
10. An electrical device, characterized in that: include: The battery as claimed in claim 9.