CN-224230321-U - Heating bag for liquid PTC heater

Abstract

The utility model discloses a heating bag for a liquid PTC heater. The PTC heating device comprises a heating shell and a PTC heating bag, wherein the heating shell comprises an upper shell and a lower shell, the upper shell and the lower shell are spliced and enclosed to form a liquid circulation cavity, the upper shell is provided with a plurality of heater grooves penetrating into the liquid circulation cavity, the PTC heating bag is inserted into the heater grooves, the PTC heating bag comprises PTC heating sheets fixed in a PTC plastic-coated fixing frame, the PTC heating sheets are fixedly bonded with electrode sheets on two sides through bonding adhesive layers coated on surfaces and are in conductive contact, wedge-shaped blocks are inserted between the electrode sheets on two sides and the heater grooves, and insulating silica gel is filled in gaps of the heater grooves. The PTC heating plate has the advantages of improving the thermal efficiency of the PTC heating plate, reducing the risk of faults caused by condensed water, combining the double-component high-heat-conductivity silica gel to fill gaps, further avoiding the problem of insulation failure caused by condensed water infiltration, and improving the operation safety of the whole machine.

Inventors

• SONG DALIAN
• SUN LEI

Assignees

• 江苏华智新能源科技有限公司

Dates

Publication Date

20260512

Application Date

20250527

Claims (6)

1. 1. The heating bag for the liquid PTC heater is characterized by comprising a heating shell and a PTC heating bag (1), wherein the heating shell comprises an upper shell (2) and a lower shell (3), the upper shell (2) and the lower shell (3) are spliced and enclosed to form a liquid circulation cavity (4), the upper shell (2) is provided with a plurality of heater grooves (5) penetrating into the liquid circulation cavity (4), the PTC heating bag (1) is inserted into the heater grooves (5), the PTC heating bag (1) comprises PTC heating sheets (6) fixed in a PTC plastic-coated fixing frame (9), the PTC heating sheets (6) are fixedly adhered to and in conductive contact with electrode sheets (8) at two sides through adhesive layers (7) coated on the surfaces, wedge-shaped blocks (10) are inserted between the electrode sheets (8) and the heater grooves (5), and insulating silica gel (13) is filled in gaps of the heater grooves (5).
2. 2. The heating bag for the liquid PTC heater as claimed in claim 1, wherein the electrode plate (8) on one side of the PTC heating sheet (6) is an electrode plate of the PTC plastic-coated fixing frame which is integrally formed with the PTC plastic-coated fixing frame (9) through injection molding.
3. 3. A heating pack for a liquid PTC heater as claimed in claim 1, wherein both sides of the lower housing (3) are respectively provided with a water inlet pipe orifice (14) and a water outlet pipe orifice (15) which are communicated with the liquid circulation chamber (4).
4. 4. A heating pack for a liquid PTC heater as claimed in claim 1, wherein the insulating silica gel (13) is made of a two-component high thermal conductivity silica gel.
5. 5. A heating pack for a liquid PTC heater as claimed in claim 1, wherein the PTC plastic-coated fixing frame (9) is a PPS glass fiber composite material.
6. 6. A heating pack for a liquid PTC heater as claimed in claim 1, wherein the wedge (10) is made of ceramic, the inclined surface of the wedge (10) is inclined at an angle ranging from 1 DEG to 1.5 DEG, and the thickness is not less than 1.0mm.

Description

Heating bag for liquid PTC heater Technical Field The utility model belongs to the technical field of PTC heating, and particularly relates to a heating bag for a liquid PTC heater. Background With the development of global economy, fossil energy is increasingly exhausted, and the traditional automobiles pollute the environment, and electric, hybrid and range-extending automobiles which utilize batteries and hydrogen energy to provide energy are a development trend of current green travel. New energy automobiles are widely accepted in solving the problem of environmental pollution of traditional fuel automobiles, have been listed into industry development planning in the national level, and are increasingly popular to replace traditional fuel automobiles, so that each large host factory is accelerated to transform and enter the field, and meanwhile, new forces for making automobiles are continuously perfecting related technologies. In the traditional fuel oil automobile, the heater for heating the automobile in winter uses the waste heat of tail gas or engine cooling circulating water as a heat source and introduces the waste heat into a heat exchanger, the air sent by a blower exchanges heat with the heat exchanger, and the heated air is sent into the automobile, so that the purposes of heating, demisting, defrosting and heating other parts needing heat sources are achieved. The heating mode has the characteristics of complex heating system, low heat efficiency and low heating speed. Different from the traditional fuel oil vehicle, the battery plate heating and the air conditioning and heating system of the new energy vehicle all need independent heaters. Meanwhile, along with the continuous development of the battery industry, the battery is used as a core component of a novel energy storage technology, plays a vital role in improving the utilization rate of renewable energy sources and ensuring the stable operation of a power system, takes a dominant role in the energy storage market, is mainly used for eliminating the peak-valley difference between day and night, and the service life of the battery directly influences the economic benefit of a project. The temperature of the battery is critical to safe and stable operation of the battery. The battery temperature is accurately regulated to ensure that the battery temperature is usually 23-25 ℃ in a proper working temperature range, so that the highest working efficiency is realized. Meanwhile, uniformity of temperature distribution in the battery pack and safety of the system prevent potential safety hazards by integrating various safety functions. Under the low-temperature environment, when the temperature of the battery is lower than-10 ℃, the battery can enter a hibernation mode and cannot work normally. At this time, the heater is used for providing heat for the heat management system, so that the battery can work normally in a low-temperature environment. PTC (Positive Temperature Coefficient) as a positive temperature coefficient semiconductor material, the resistivity of which increases rapidly when the temperature reaches around the curie temperature of the PTC element. The PTC heater has the characteristics of high starting speed, high heat efficiency, good temperature control, safety, no open fire, ideal working reliability, energy conservation, long service life and the like, and the PTC heater is widely applied as a safe electric heating product, thus being an ideal electric heating material. However, in the use process, the PTC sheet has poor heat dissipation, so that the working point of the PTC element is easy to go beyond the highest point of the heat resistance characteristic, enter the NTC stage, and cause the temperature to rapidly rise to cause thermal breakdown of the PTC element, thereby causing insulation failure of the heater and affecting the operation of the heating system, so that the PTC is adopted as the heating element, and the improvement of the heat dissipation capacity of the PTC element is important to consider. At present, a liquid heater in a new energy automobile and an energy storage market is widely adopted, a die casting body is used as a closed cavity combined with a plastic water tank, antifreeze flowing in a circulating cavity is used as a heat carrier, heat generated by a PTC heating bag in a heating chamber of the heater is taken away, and heat is provided for an air conditioner, a battery and an energy storage product of the new energy automobile. The PTC of current mainstream generates heat and wraps including the PTC of center generates heat piece and by insulating film and the centre gripping wedge that covers in proper order from inside to outside, and polyimide is adopted as insulating heat conduction material to the insulating film in this structure, and polyimide material self coefficient of heat conduction is not high, in order to guarantee PTC and generates heat the radiating effect of piece, the ins