Flexible device for battery heating and heat preservation

Abstract

The utility model relates to a flexible device for battery heating and heat preservation, which comprises a heating component, a heat preservation and heat insulation layer and a heating and heat preservation control module, the heating component comprises a heating body and a flexible protection layer for sealing the heating body, and the heat preservation and heat insulation layer is arranged on the outer surface layer of the heating component and fixedly attached to the heating component to form the heating and heat preservation flexible device. A detachable fixing part for locking and fixing the heat preservation and insulation layer and the battery pack is arranged on the heat preservation and insulation layer; and the heating and heat preservation control module comprises a temperature controller, a plurality of temperature measuring bodies, a wireless communication module and control software. The heating part is wrapped and attached to the outer surface of the power battery pack through the heat preservation and insulation layer and the detachable fixing part, temperature heat output is provided for the battery pack through the heating part, and therefore it is guaranteed that an electric vehicle can be normally charged and work in the low-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy power batteries, and in particular to a flexible device for heating and heat preservation of batteries. Background Art

[0002] Electric vehicles often fail to charge in low-temperature environments, and the charging efficiency of electric vehicles also decreases, mainly because the activity of the chemical substances in the battery decreases. There are many problems with electric vehicles in winter, and the failure to charge and the reduction in battery life are all pain points. These situations not only affect the service life of electric vehicles, but also bring inconvenience to people's travel.

[0003] Therefore, there is an urgent need for a device for low-temperature protection of power batteries that has good wrapping, excellent waterproofness, high safety, low power consumption, low cost and easy industrial application, so as to ensure that electric vehicles can have higher charging efficiency and longer cruising range in low-temperature environments. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a flexible device for heating and heat preservation of batteries.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A flexible device for heating and keeping warm a battery, comprising:

[0007] A heating component, the heating component comprising a heating element that generates heat when powered on and a flexible protective layer that seals the heating element;

[0008] A thermal insulation layer, which is arranged on the outer surface of the heating component by gluing, drilling, riveting, nailing or sewing, and is fixedly attached to the outer surface of the heating component to form the heating and insulation soft device, and a detachable fixing component for locking and fixing the thermal insulation layer to the battery pack is provided on the thermal insulation layer;

[0009] A heating and heat preservation control module, the heating and heat preservation control module includes a temperature controller, a plurality of temperature measuring bodies, a wireless communication module and control software, the plurality of temperature measuring bodies are used to detect the temperature of the heating and heat preservation soft device, and are arranged between the heating component and the heat preservation and heat insulation layer, or arranged on the inner surface of the heating component, the plurality of temperature measuring bodies and the heating component are electrically connected to the signal acquisition end and the power output end of the temperature controller respectively, the temperature controller is electrically connected to the wireless communication module, and communicates with the control device of the external environment through the wireless communication module to realize wireless control, and the control software is installed in the control device.

[0010] Furthermore, the heating element is a flexible heating sheet, an electric heating wire or an FPC flexible heating film.

[0011] Furthermore, the heating element adopts a flexible heating sheet based on carbon nanotube material, and the surface of the flexible heating sheet based on carbon nanotube material is designed with electrodes in a multi-point electrode manner according to power requirements. The multi-point electrodes are connected in series and parallel and then led out to the flexible protective layer through wires.

[0012] Furthermore, the detachable fixing component is one of Velcro, buttons, snap fasteners, and elastic bands.

[0013] Furthermore, the detachable fixing component is selected from the combination of the Velcro and the locking ring. The Velcro is set at the upper and lower ends of the right side of the thermal insulation layer by sewing, and the locking ring is set at the upper and lower ends of the left side of the thermal insulation layer by locking ring mounting cloth tape. The locking ring mounting cloth tape is formed by overlapping and bonding a cloth tape end to end to form an annular mounting end, and the locking ring is installed in the annular mounting end.

[0014] Furthermore, the temperature controller adopts one of a sudden jump type temperature controller, a liquid expansion type temperature controller, a pressure type temperature controller and an electronic type temperature controller, and its control mode includes one or both of switch control and PID control.

[0015] Furthermore, the wireless communication module is integrated into the temperature controller to form a wireless intelligent temperature controller.

[0016] Furthermore, the temperature measuring body adopts one of a thermocouple, a thermal resistor, a thermistor and a non-contact sensor.

[0017] Furthermore, the control device adopts a remote controller or an intelligent terminal, and the software is embedded in the remote controller or installed in the intelligent terminal.

[0018] Furthermore, the temperature controller is connected to the vehicle system or a mobile power source through a data line, and interaction and power supply are achieved through the vehicle system, or it is powered by a mobile power source.

[0019] The beneficial effects of the utility model are:

[0020] 1. The utility model provides a heat preservation and heat insulation layer and a detachable fixing component to wrap the heating component and attach it to the outer surface of the power battery pack. The heating component provides the battery pack with temperature heat output, thereby ensuring that the electric vehicle can charge normally in a low temperature environment. At the same time, the heating and heat preservation control module is used to adjust the mode of the air ratio to keep warm. The temperature sensor monitors the heat preservation temperature in real time to achieve the best heat preservation effect and reduce power consumption, so as to improve the endurance of the electric vehicle.

[0021] 2. The utility model attaches a thermal insulation layer to the outer surface of the flexible heating component, which can reduce the heat loss of the heating component and improve the heat utilization of the heating component. At the same time, the thermal insulation layer can provide additional anti-collision protection, waterproof protection, and flame retardant protection for the power battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the system structure diagram of the utility model;

[0023] Figure 2 This is a structural diagram of the heating component and thermal insulation layer of the utility model;

[0024] Figure 3 This is a schematic diagram of the application of the embodiment of the utility model;

[0025] Figure 4-7 The temperature variation curve of the surface of the relevant device under the heating environment simulated for each embodiment;

[0026] Figure 8 The power attenuation curves of various embodiments working for 500 hours at different powers;

[0027] in:

[0028] 1. Heating component, 101. Flexible heating sheet, 102. Electrode, 103. Flexible protective layer, 2. Thermal insulation layer, 3. Removable fixing component, 301. Velcro, 302. Locking ring, 4. Heating and insulation control module, 401. Temperature controller, 402. Temperature measuring body, 5. Data cable, 6. Adhesive layer, 7. Battery pack, 8. Battery casing. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] like Figure 1 As shown, the utility model provides a flexible device for battery heating and heat preservation and a control system thereof, comprising a heating component 1, a heat preservation and heat insulation layer 2 and a heating and heat preservation control module.

[0032] The heating component 1 includes a heating element and an electrode. The heating element may be a flexible heating sheet 101, an electric heating wire or an FPC flexible heating film. A flexible heating sheet is preferably used as the heating element, such as Figure 1 As shown, the surface of the flexible heating sheet 101 is designed with electrodes 102 in a manner that matches the multi-point electrodes according to the power requirements, and the multi-point electrodes are connected in series and parallel and then led out through wires. The flexible heating sheet and the electrodes form a flexible planar heating body.

[0033] Furthermore, the flexible heating sheet 101 can be a far-infrared flexible heating sheet based on carbon nanomaterials, with carbon nanotubes as the core heating element. Due to the excellent bending resistance and high temperature resistance of carbon tubes at 1500°C, the flexible heating sheet based on carbon nanomaterials has excellent flexibility and bending resistance. The power of the flexible heating sheet is basically not attenuated when working at 85°C for 500h (e.g. Figure 5 shown).

[0034] Furthermore, the flexible heating sheet includes a carbon material layer, and the thickness of the carbon material layer is 0.1μm to 100um. The carbon material layer has excellent flexibility, and the resistance change is less than 5% after being bent millions of times. Preferably, the carbon material layer includes a film-like conductive material layer based on sp2 hybrid structure carbon material, and the surface resistance of the film-like conductive material layer is 0.01Ω / sq to 100Ω / sq, the driving voltage is ≤48V, and the power is 50 to 150W. The carbon material layer includes any one or a combination of two or more of carbon nanotubes, graphene, graphite, and conductive carbon black. The electrode 102 is printed on the surface of the flexible heating sheet 101 to form a flexible electrode.

[0035] Further, such as Figure 2 As shown, the heating component 1 also includes a flexible protective layer 103 arranged on the upper and lower surfaces of the heating element and the electrode. The upper and lower surfaces of the heating element and the electrode are insulated and sealed by the flexible protective layer 103, thereby forming the heating component of the utility model. After cutting and punching, the flexible planar heating element composed of the flexible heating sheet and the electrode is bonded with the upper and lower pieces of thermal insulation and insulating flexible material (i.e., the flexible protective layer 103) to achieve insulation sealing. The upper and lower flexible protective layers 103 are pressed and sealed by quick pressing or pressure transmission equipment, and are sealed with high temperature resistant sealant to ensure the overall sealing effect.

[0036] Through the sealing of the flexible protective layer, the heating and insulation flexible device of the utility model has good waterproof performance, thereby effectively avoiding the safety hazards caused by rain.

[0037] like Figure 1 and Figure 2 As shown, the thermal insulation layer 2 of the utility model is arranged on the outer surface of the heating component 1, providing the heating component 1 with further thermal insulation function and further protection function. The thermal insulation material 2 is made of flexible, waterproof and flame retardant material, and can be selected from one or a combination of thermal insulation paper, glass fiber wool board / felt, polyurethane foam material, centrifugal stripping fiber wool / rock wool, micro-nano insulation board. Through the thermal insulation layer 2, the heat loss of the heating component 1 can be reduced and the heat utilization of the heating component 1 can be improved.

[0038] Furthermore, a detachable fixing component 3 is provided on the thermal insulation layer 2, and the heating and keeping warm flexible device of the utility model and the battery pack can be quickly fixed and removed by the detachable fixing component 3. The detachable fixing component 3 is one of Velcro, buttons, snap fasteners, elastic bands, etc., and the heating and keeping warm flexible device of the utility model is firmly covered on the outside of the battery pack by the detachable fixing component 3.

[0039] Of course, the heating and insulation flexibility device of the present invention can also be wrapped around the outside of the battery pack in a physical binding manner, such as using a strapping tape.

[0040] Further, such as Figure 1 As shown, the detachable fixing component 3 uses Velcro 301 and a locking ring 302 to achieve the covering, fitting and fixing of the heating and insulation flexible device and the battery pack. The Velcro 301 is set on the upper and lower ends of the right side of the thermal insulation layer 2 by sewing, and the upper and lower ends of the left side of the thermal insulation layer 2 are sewn with a locking ring mounting cloth tape and a locking ring 302. Preferably, the hook end of the Velcro 301 is sewn on the outer surface of the thermal insulation layer 2, and its round hair end extends out of the right side of the thermal insulation layer and is freely exposed. The locking ring mounting cloth tape is formed by overlapping and fitting a cloth tape head and tail to form a ring-shaped mounting end, and then sewing it to the left side of the thermal insulation layer 2.

[0041] When in use, the heating component 1 of the inner layer of the heating and insulation flexible device of the utility model is fitted and wrapped with the battery pack. After the heating and insulation flexible device wraps around the battery pack once, the Velcro 301 and the locking ring 302 meet. Then the round ends of the Velcro at the upper and lower ends of the thermal insulation layer are respectively passed through the locking rings at the upper and lower ends of the thermal insulation layer and fitted and fixed with the hook ends of the Velcro, so that the heating and insulation flexible device of the utility model is wrapped and locked with the battery pack and fixed to the outer surface of the battery pack.

[0042] Furthermore, in order to avoid misalignment and deformation of the heating component 1 and the thermal insulation layer 2, the heating component 1 and the thermal insulation layer 2 are bonded together by using one of adhesive tape (high temperature resistant double-sided tape, hot melt adhesive, adhesive, hot pressing adhesive film dispensing, etc.), drilling holes around the circumference, riveting, nailing, stitching, etc. Preferably, the thermal insulation layer is bonded to the outer surface of the heating component 1 by using adhesive tape, such as Figure 2 As shown, an adhesive layer 6 is provided between the heating component 1 and the thermal insulation layer 2 .

[0043] like Figure 1 As shown, the heating and heat preservation control module 4 of the present invention includes a temperature controller 401, a plurality of temperature measuring bodies 402, a wireless communication module and an APP software system.

[0044] The temperature controller 401 refers to a series of automatic control elements that produce certain special effects and conduction or disconnection actions by physically deforming the switch according to the temperature change of the working environment. The temperature controller used in this application is one of a sudden jump temperature controller, a liquid expansion temperature controller, a pressure temperature controller, and an electronic temperature controller. The control mode is one of ON / OFF control and PID control.

[0045] Furthermore, the heating component is electrically connected to the temperature controller 401 through a wire. In one embodiment, the temperature controller has two states: on (ON) and off (OFF). Temperature measurement is performed in conjunction with a temperature measuring body. When the set temperature is lower than the target temperature, the temperature controller outputs an ON signal to start heating; when the set temperature is higher than the target temperature, the temperature controller outputs an OFF signal to stop heating.

[0046] The temperature measuring body 402 is a component that converts temperature signals into electrical signals and is usually installed at the detection part of the controlled object to monitor its temperature value. The temperature measuring body used in the utility model is one of a thermocouple, a thermal resistor, a thermistor and a non-contact sensor.

[0047] Furthermore, the temperature controller 401 is internally integrated with a signal acquisition and amplification circuit module for collecting signals of the temperature measuring body 402, and a plurality of temperature measuring bodies are electrically connected to the signal acquisition input terminal of the temperature controller 401 via signal acquisition wires, thereby collecting temperature changes of the plurality of temperature measuring bodies through the signal acquisition and amplification circuit module.

[0048] Furthermore, in one embodiment, the temperature controller is electrically connected to the wireless communication device via the data line 5, and the temperature controller communicates wirelessly with an external control device via the wireless communication device, thereby performing wireless control via the external control device. The control device may be a remote controller or various intelligent terminals, such as a smart phone.

[0049] In another embodiment, the wireless communication device is integrated in the temperature controller to form a wireless intelligent temperature controller, which is connected to the vehicle system or mobile power supply through the data line 5, and the vehicle system and the wireless intelligent temperature controller are used to communicate and power the wireless intelligent temperature controller; or the wireless intelligent temperature controller is powered directly by the power supply. When the wireless intelligent temperature controller is powered directly by the power supply, a power adapter is also included accordingly, so that the corresponding working voltage and power are provided by the power adapter. The wireless communication device can select a wifi module or a Bluetooth module, and preferably a low-power Bluetooth module.

[0050] Furthermore, the control device preferably uses a smart phone as an external control device, and the APP software system is installed in the smart phone, so as to facilitate the remote control of the heating and insulation soft device through the APP software on the smart phone.

[0051] The heating component and the temperature measuring body of the utility model are electrically connected to the wireless intelligent heating and heat preservation control module. When the heating component works at full power, the temperature quickly rises to the rated temperature. After the temperature measuring body detects that the rated temperature has been reached, the temperature controller adjusts the duty cycle to keep warm. The temperature measuring body monitors the heat preservation temperature in real time to achieve the best heat preservation effect and reduce power consumption, thereby realizing intelligent high and low temperature control of the heating plate.

[0052] Further, such as Figure 3 As shown, during use, the heating and insulation soft device of the present invention is outside the power battery pack and is encapsulated by the battery shell 8. The periphery of the battery pack 7 is the heating component 1, the thermal insulation layer 2 and the battery shell 8 in sequence.

[0053] Example 1

[0054] The heating and heat preservation flexible device of this embodiment adopts a heating component based on carbon nanotubes and a heat preservation and heat insulation layer based on aluminum silicate ceramic fiber paper. The heating component based on carbon nanotubes is fixed together with the heat preservation and heat insulation layer based on aluminum silicate ceramic fiber paper through a layer of high temperature resistant colloid. Then it is wrapped on the power battery pack with a strapping tape or a detachable fixing component composed of the above-mentioned Velcro and locking ring.

[0055] The heating and insulation control module uses a combination of an electronic temperature controller and an NTC thermistor (temperature measuring body). The electronic temperature controller has two states: ON and OFF. When the set temperature is lower than the target temperature, the electronic temperature controller will output an ON signal to start heating; when the set temperature is higher than the target temperature, the electronic temperature controller will output an OFF signal to stop heating. The NTC thermistor performs temperature measurement and overheating protection.

[0056] After connecting to a 48V / 5A DC power supply, the power is 144W. Then, a heating experiment is conducted on the battery pack at -10℃. Figure 4 As shown in the figure, the surface temperature is kept at 60-90℃, and the battery cell temperature can be restored to 0℃ in about 1 hour, so it can be charged normally.

[0057] Example 2

[0058] The heating and insulation flexible device of this embodiment uses a heating component based on an electric heating wire and a heat insulation layer based on polyurethane flame retardant foam. The heating component based on the electric heating wire is fixed together with the heat insulation layer based on polyurethane flame retardant foam by four-axis punching and riveting. Then it is wrapped on the power battery pack with a strapping tape or the detachable fixing component composed of the above-mentioned Velcro and locking ring.

[0059] The heating and insulation control module uses a combination of a digital temperature controller and a thermocouple (temperature measuring body). The digital thermostat has two states: ON and OFF. When the set temperature is lower than the target temperature, the digital thermostat will output an ON signal to start heating; when the set temperature is higher than the target temperature, the digital thermostat will output an OFF signal to stop heating; the thermocouple performs temperature measurement and overheating protection.

[0060] After connecting to a 12V / 5A DC power supply, the power is 57.6W and the surface temperature is kept at 40-70℃. Then the battery pack is heated at -10℃. Figure 5 As shown, it takes about 2 hours for the battery cell temperature to return to 0°C and normal charging can be carried out.

[0061] Example 3

[0062] The heating and insulation flexible device of this embodiment uses a heating component based on FPC flexible heating film and a heat insulation layer based on centrifugally peeled fiber cotton. The heating component based on FPC flexible heating film is fixed together with the heat insulation layer based on centrifugally peeled fiber cotton by applying hot melt adhesive. Then it is wrapped on the power battery pack with a strapping tape or a detachable fixing component composed of the above-mentioned Velcro and locking ring.

[0063] The heating and insulation control module adopts a combination of a sudden jump thermostat and an automatic reset temperature control switch. The sudden jump thermostat has two states: ON and OFF. When the set temperature is lower than the target temperature, the internal contacts automatically close and start heating; when the set temperature is higher than the target temperature, the internal contacts automatically open and stop heating.

[0064] After connecting to a 24V / 5A DC power supply, the power is 96W. Then the battery pack is heated at -10℃ and the surface temperature is kept at 55-80℃. Figure 6As shown, it takes about 1h20min for the battery cell temperature to return to 0℃ and normal charging can be carried out.

[0065] Example 4

[0066] The heating and insulation flexible device of this embodiment uses a graphene-based heating component and a glass fiber cloth insulation layer. The graphene-based heating component is fixed together with the glass fiber cloth insulation layer by sewing. Then, it is wrapped on the power battery pack with a detachable fixing component composed of Velcro with elastic band.

[0067] The heating and insulation control module uses a combination of a digital temperature controller and an NTC thermistor (temperature measuring body). The electronic temperature controller has two states: ON and OFF. When the set temperature is lower than the target temperature, the electronic temperature controller will output an ON signal to start heating; when the set temperature is higher than the target temperature, the electronic temperature controller will output an OFF signal to stop heating. The NTC thermistor performs temperature measurement and overheating protection.

[0068] After connecting to a 36V / 5A DC power supply, the power is 120W. Then, a heating experiment is conducted on the battery pack at -10℃. Figure 7 As shown, the surface temperature is kept at 60-85℃, and the battery cell temperature can be restored to 0℃ in about 1h10min, allowing normal charging.

[0069] like Figure 8 As shown, it is a power attenuation change curve diagram of Examples 1 to 4 when powered on for 500 hours at different powers. From the top to the bottom are the power attenuation change curve diagrams of Example 1, Example 4, Example 3 and Example 2. It can be seen from the figure that the four embodiments all maintain stable power output and work at full power for 500 hours with basically no power attenuation.

[0070] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible device for heating and keeping warm a battery, characterized in that: include: A heating component, the heating component comprising a heating element that generates heat when powered on and a flexible protective layer that seals the heating element; A thermal insulation layer, which is arranged on the outer surface of the heating component by gluing, drilling, riveting, nailing or sewing, and is fixedly attached to the outer surface of the heating component to form the heating and insulation soft device, and a detachable fixing component for locking and fixing the thermal insulation layer to the battery pack is provided on the thermal insulation layer; A heating and heat preservation control module, the heating and heat preservation control module includes a temperature controller, a plurality of temperature measuring bodies, a wireless communication module and control software, the plurality of temperature measuring bodies are used to detect the temperature of the heating and heat preservation soft device, and are arranged between the heating component and the heat preservation and heat insulation layer, or arranged on the inner surface of the heating component, the plurality of temperature measuring bodies and the heating component are electrically connected to the signal acquisition end and the power output end of the temperature controller respectively, the temperature controller is electrically connected to the wireless communication module, and communicates with the control device of the external environment through the wireless communication module to realize wireless control, and the control software is installed in the control device.

2. A flexible device for battery heating and heat preservation as claimed in claim 1, characterized in that: The heating element is a flexible heating sheet, an electric heating wire or an FPC flexible heating film.

3. A flexible device for battery heating and heat preservation as claimed in claim 2, characterized in that: The heating element adopts a flexible heating sheet based on carbon nanotube material. The surface of the flexible heating sheet based on carbon nanotube material is designed with electrodes in a manner of matching multi-point electrodes according to power requirements. The multi-point electrodes are connected in series and parallel and then lead out to the flexible protective layer through wires.

4. A flexible device for heating and keeping warm a battery according to any one of claims 1 to 3, characterized in that: The detachable fixing component is one of Velcro, buttons, snap fasteners and elastic bands.

5. A flexible device for battery heating and heat preservation as claimed in claim 4, characterized in that: The detachable fixing component is selected from the combination of the Velcro and the locking ring. The Velcro is set at the upper and lower ends of the right side of the thermal insulation layer by sewing. The locking ring is set at the upper and lower ends of the left side of the thermal insulation layer by means of a locking ring mounting cloth tape. The locking ring mounting cloth tape is formed by overlapping and bonding a cloth tape end to end to form an annular mounting end, and the locking ring is installed in the annular mounting end.

6. A flexible device for battery heating and heat preservation as claimed in claim 1, characterized in that: The temperature controller adopts one of a sudden jump type temperature controller, a liquid expansion type temperature controller, a pressure type temperature controller and an electronic type temperature controller, and its control mode includes one or both of switch control and PID control.

7. A flexible device for battery heating and heat preservation as claimed in claim 6, characterized in that: The wireless communication module is integrated in the temperature controller to form a wireless intelligent temperature controller.

8. A flexible device for heating and keeping warm a battery as claimed in claim 6 or 7, characterized in that: The temperature measuring body is one of a thermocouple, a thermal resistor, a thermistor and a non-contact sensor.

9. A flexible device for battery heating and heat preservation as claimed in claim 8, characterized in that: The control device adopts a remote controller or an intelligent terminal, and the software is embedded in the remote controller or installed in the intelligent terminal.

10. A flexible device for battery heating and heat preservation as claimed in claim 8, characterized in that: The temperature controller is connected to the vehicle system or a mobile power source through a data line, and interaction and power supply are achieved through the vehicle system, or it is powered by a mobile power source.

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