WO2021010550A1

WO2021010550A1 - Battery-cooling water heating device improved in thermal fuse coupling structure

Info

Publication number: WO2021010550A1
Application number: PCT/KR2019/016581
Authority: WO
Inventors: 김영근; 이만옥; 정우헌; 박지훈; 윤형열
Original assignee: 대우전자부품(주)
Priority date: 2019-07-16
Filing date: 2019-11-28
Publication date: 2021-01-21

Abstract

The present invention provides a battery-cooling water heating device improved in a thermal fuse coupling structure, wherein a thermal fuse seated on a heating plate having a double-stacked plate structure is stably fixed using a fuse cover and the outer plate constituting the heating plate. That is, the heating plate comprises: a lower plate on which the thermal fuse is directly seated; and an upper plate which is stacked on the lower plate and has an upwardly open and bent fuse mounting hole formed to allow insertion of the fuse cover therein, wherein power can be supplied directly onto the heating plate. Therefore, the power blocking function of the fuse cover is enhanced, and components functioning as a conventional controller are excluded and thus simplification of components can be achieved.

Description

Coolant heating device for battery with improved thermal fuse coupling structure

The present invention relates to a cooling water heating device for a battery.

Vehicles powered by engines using gasoline or diesel as an energy source are currently the most common types of vehicles, but these vehicle energy sources require a new energy source due to various causes such as reduction in oil reserves as well as environmental pollution. As it is increasingly emerging, electric vehicles, hybrid cars, and fuel cell vehicles are currently being commercialized or under development.

However, in electric vehicles, hybrid cars, and fuel cell vehicles, unlike conventional vehicles using engines using petroleum as an energy source, a heating system using coolant cannot or is difficult to apply. That is, in the case of a vehicle that uses an engine that uses oil as an energy source as a driving source, a lot of heat is generated from the engine, a coolant circulation system is provided to cool the engine, and the heat absorbed from the engine is heated indoors. To use it. However, since much heat such as that generated by the engine is not generated from the driving sources of electric vehicles, hybrid cars, and fuel cell vehicles, there is a limit to using such a conventional heating method.

Accordingly, in electric vehicles, hybrid cars, and fuel cell vehicles, various studies have been conducted, such as adding a heat pump to the air conditioning system so that it can be used as a heat source, or having a separate heat source such as an electric heater. have.

Among them, electric heaters are widely used because they can more easily heat the cooling water without significantly affecting the air conditioning system. Electric heaters include an air-heated heater that directly heats air blown into the interior of a vehicle, and a coolant-heated heater (or coolant heater) that heats the coolant.

In Korean Patent Laid-Open Patent (10-2019-0024388), which proposes a cooling water heating type heater, it is possible to prevent overheating of the heating element by improving the overheat detection response of the heating element, and the failure factor in the part where the thermal fuse is coupled is reduced. A cooling water heater with improved durability is disclosed.

On the other hand, looking at the process of coupling the thermal fuse on the coolant-heated heater, the thermal fuse in a state in which a cover plate on which a thermal fuse is placed on a lower housing is fastened, and a controller that penetrates the thermal fuse is disposed at a distance above the cover plate It has a form in which the upper end of the upper housing is coupled in a manner of pressing using a protrusion formed at the lower end of the upper housing.

Looking at the above structure, by combining the upper housing and the lower housing, the thermal fuse is pressurized and fixed to the cover plate, and through this, the temperature or heat of the heating element in close contact with the lower end of the cover plate is transferred to the thermal fuse through the cover plate. It can be seen that it enables detection of overheating. That is, in the related art, the thermal fuse is positioned on the center of the cover plate before the upper housing is coupled to the lower housing, whereas the thermal fuse is pressed against the cover plate with an appropriate pressure. There is a limit that it cannot be achieved.

Looking at the above structure, it can be seen that the temperature or heat of the heating element is transferred to the thermal fuse through the cover plate, so that overheating can be detected.The cutoff temperature set in the thermal fuse only when sufficient heat is applied to the cover plate. There is a problem of reaching That is, if the thermal fuse is shut off after excessive heat transfer from the heating element to the cover plate, the cover plate is thermally deformed, resulting in the overall structural deformation of the cooling water-heated heater. In the case of combining the heater on the housing constituting the heater, the improvement of the housing for stably positioning the temperature sensor is required.

(Patent Document 1) Republic of Korea Patent Publication No. 10-2019-0024388 "Cooling water heater" (2019.03.08.)

In order to solve the above problems, it is an object of the present invention to stably fix a thermal fuse mounted on a heating plate having a double-stacked plate structure using an outer plate and a fuse cover forming the heating plate. It characterized in that it provides a cooling water heating device for a battery with an improved coupling structure.

An object of the present invention is a temperature that may occur due to interference with surroundings while a temperature sensor that senses and adjusts the temperature of the cooling water discharged from the cooling water heating device during the heating process through the heating element is fixed on the cooling water heating device. It characterized in that it provides a cooling water heating device for a battery having a structure to prevent damage to the detection sensor.

It is an object of the present invention to heat supplied through a heating element disposed in the lower housing on a heating plate having a main plate having a structure covering the open upper side of the lower housing and a fuse plate installed in the plate hole formed through the main plate. It is characterized by providing a cooling water heating device for a battery having a plate heat deformation prevention structure by improving a heat transfer structure to a thermal fuse mounted on an upper end of the fuse plate through a process of directly transferring the fuse plate.

An object of the present invention is to make the thickness of the fuse plate smaller than that of the main plate on a heating plate having a main plate having a structure covering the open upper side of the lower housing and a fuse plate installed in a plate hole formed through the main plate. Provides a cooling water heating device for a battery that improves the reaction speed of the thermal fuse by maintaining and smoothing heat transfer to the thermal fuse mounted on the top of the fuse plate depending on whether the coolant supplied to the lower housing flows normally. It features.

An object of the present invention is to prevent thermal deformation of the heating plate due to excessive heat transfer during the heating process through a heating element on the heating plate on which the thermal fuse is seated, and at the same time, the thermal fuse can be used to smoothly detect the heat applied to the thermal fuse. It characterized in that it provides a cooling water heating device for a battery having a structure for insulating and shielding the surroundings.

The cooling water heating apparatus for a battery having an improved coupling structure of a thermal fuse according to an embodiment of the present invention for achieving the above object includes an inlet part 110 into which the cooling water is introduced and an outlet part 120 through which the cooling water is discharged. Formed lower housing 100; A heating plate 200 coupled to cover and close the open upper side of the lower housing 100; A heating member 300 provided in an inner space formed by a combination of the lower housing 100 and the heating plate 200; A thermal fuse 400 coupled to the heating plate 200; And an upper housing 500 coupled to an upper end of the lower housing 100, wherein the heating plate 200 contacts the upper end of the heating member 300 and opens the lower housing 100 at the same time. A main plate 210 having a structure covering the upper side of the main plate 210 and an outer plate having a fuse mounting portion 221 bent upward to mount the thermal fuse 400 in a state of being stacked on the upper surface of the main plate 210 In a state in which the fuse cover 410, which is a structure including 220 and having a hollow shape having an open upper and lower part, is inserted into the space between the thermal fuse 400 and the fuse mounting part 221, the fuse mounting part ( The thermal fuse 400 is stably coupled to the heating plate 200 through a structure in which the coupling protrusion 411 formed in the fuse cover 410 is fitted into the coupling hole 223 formed through the 221. Characterized in that.

The cooling water heating device for a battery further includes a water temperature sensor 700 detachably coupled to the lower housing 100, and a sensor fastener 130 protruding in a hollow shape on the lower housing 100 ) And a clamp ring 140 for preventing separation of the water temperature sensor 700 coupled to the sensor fastener 130, and the sensor fastener 130 includes an inside of the lower housing 100 A fastening body 131 protruding outward from the lower housing 100 in a state in communication with the space and having a hollow pipe shape for insertion of the water temperature sensor 700 and a side surface of the fastening body 131 It is provided with an interference prevention device 133 protruding in the outward direction.

The fuse cover 410 is bent in such a manner that it surrounds the upper edge of the thermal fuse 400 and the coupling protrusion 411 that is fitted from the inside to the outside in the coupling hole 223 formed in the fuse mounting part 221 It includes a stepped portion 413 to be formed.

The main plate 210 includes a receiving groove 211 formed concave from the upper surface to the lower side, and a portion of the lower end of the thermal fuse 400 is inserted into the receiving groove 211 and coupled to the heating plate 200. ) And the thermal fuse 400 to contact each other.

The cooling water heating device for a battery having an improved coupling structure of a thermal fuse according to another embodiment of the present invention for achieving the above object includes an inlet 110 through which cooling water is introduced and an outlet 120 through which cooling water is discharged. Formed lower housing 100; A heating plate 200 coupled to cover and close the open upper side of the lower housing 100; A heating member 300 provided in an inner space formed by a combination of the lower housing 100 and the heating plate 200; A thermal fuse 400 coupled to the heating plate 200; And an upper housing 500 coupled to an upper end of the lower housing 100, wherein the heating plate 200 has a main plate 210 having a structure covering the open upper side of the lower housing 100, and It includes a fuse plate 220 on which the thermal fuse 400 is mounted in a state seated in the plate hole 212 formed in the main plate 210, and is positioned downward on the central portion of the fuse plate 220. In a state in which the thermal fuse 400 is placed in the grooved fuse mounting portion 222, the fuse cover 410 is coupled to the thermal fuse 400 by covering the thermal fuse 400.

Heat transferred from the heating member 300 to the thermal fuse 400 through the fuse plate 220 is blocked from being discharged to the outside by a heat shield member 410 fitted on the thermal fuse 400 When it is determined that the heating temperature of the heating member 300 exceeds a preset limit temperature, the thermal fuse 400 is controlled to stop the operation.

The thickness of the fuse plate 220 is kept smaller than that of the main plate 210.

The lower end of the fuse seating part 222 is set to have the same height as the lower end of the main plate 210 or lower than the lower end of the main plate 210.

The fuse cover 410 is a structure having a hollow shape having a structure in which the lower part is opened, and a cover body in the shape of a hollow box accommodating the thermal fuse 400 therein, and a pressing protrusion protruding on the inner upper surface of the cover body Includes.

According to the present invention as described above, all of the objects of the present invention described above can be achieved.

The cooling water heating device for a battery with an improved coupling structure of the thermal fuse according to the present invention stably fixes the thermal fuse seated on a heating plate having a double-stacked plate structure using an outer plate and a fuse cover forming the heating plate. Let's do it.

That is, a heating plate is formed to have a lower plate on which a thermal fuse is directly seated and an upper plate with a fuse mounting hole that is stacked on the lower plate and has a fuse mounting hole that is open and bent upward to allow insertion of the fuse cover, and By enabling direct power supply, the power-off function of the fuse cover is reinforced, and components are simplified by excluding components that function as a conventional controller.

The present invention stably fixes the thermal fuse using the fuse cover and the upper and lower plates before the upper housing is coupled to the lower housing, thereby preemptively performing a quality inspection during the process of assembling the cooling water heating device for the battery. Make it possible.

The cooling water heating device for a battery having a structure to prevent separation of a temperature detection sensor according to the present invention includes a temperature detection sensor that senses and controls the temperature of the cooling water discharged from the cooling water heating device during the heating process through the heating element, fixed on the cooling water heating device. In the state, it has a structure to prevent damage to the temperature sensor that may occur due to interference with the surroundings. That is, in the process of coupling the temperature detection sensor to the sensor fastener formed on the cooling water outlet side of the housing, the sensor coupling portion is placed on the sensor coupling hole to block interference with the surrounding clamp ring that connects the sensor fastener and the temperature detection sensor. To have a structure protruding outward.

The cooling water heating device for a battery having a plate heat deformation prevention structure according to the present invention is on a heating plate having a main plate having a structure covering the open upper side of the lower housing and a fuse plate installed in a plate hole formed through the main plate, A heat transfer structure to a thermal fuse mounted on an upper end of the fuse plate is improved by directly transferring heat supplied through the heating element disposed in the lower housing to the fuse plate. That is, heat transfer from the heating element to the thermal fuse is directly performed through the fuse plate coupled on the central part of the main plate coupled to the lower housing, and power cut off by the thermal fuse is efficiently performed through the above process. Let's do it.

The external heating apparatus for a battery having a heat transfer structure for improving the reaction speed of a thermal fuse according to the present invention includes a main plate having a structure covering the open upper side of the lower housing and a fuse plate installed in a plate hole formed through the main plate. On the plate, the thickness of the fuse plate is kept smaller than that of the main plate, and heat transfer to the thermal fuse mounted on the upper end of the fuse plate is facilitated depending on whether the coolant supplied to the lower housing flows normally.

That is, in the present invention, cooling is performed through smooth heat transfer through the fuse plate under a steady state flow in which the coolant flows through the lower housing, thereby enabling immediate temperature detection of the cooling water through the thermal fuse, and Under an abnormal flow in which the cooling water flows through it is not smoothly performed, heat through the heating element is directly transferred to the fuse plate due to insufficient cooling water, thereby enabling immediate high temperature detection of the thermal fuse.

The present invention directly transfers the heat supplied through the heating element to the fuse plate, and improves the heat sensing performance of the thermal fuse through the process of forming the periphery of the thermal fuse mounted on the upper end of the fuse plate in an insulating shielding structure. Improve. That is, the main plate coupled to the lower housing enables stable support of the heating element, while the fuse plate coupled on the central part of the main plate penetrates through the heating plate surrounding the thermal fuse when the heating element is overheated. By blocking the leakage heat, it is possible to efficiently detect the heat by the thermal fuse.

1 shows an assembled state of a cooling water heating device for a battery having an improved coupling structure of a thermal fuse according to an embodiment of the present invention.

2 shows an exploded state of the cooling water heating device for a battery of FIG. 1.

3 is a cross-sectional view taken along line A-A of the cooling water heating device for a battery of FIG. 1.

4 is a cross-sectional view taken along line B-B of the cooling water heating device for a battery of FIG. 1.

5 shows a configuration in which a thermal fuse seated on a heating plate having a double-stacked plate structure in the present invention is stably fixed by using an outer plate and a fuse cover constituting the heating plate.

6 shows a structure for fastening a temperature sensor through a sensor fastener and a clamp ring.

7 shows a configuration of a cooling water heating device for a battery having an insulating shielding structure for a thermal fuse according to another embodiment of the present invention.

8 shows an exploded state of the cooling water heating device for a battery of FIG. 7.

9 is a cross-sectional view taken along line A-A of the cooling water heating device for a battery of FIG. 7.

10 is a cross-sectional view taken along line B-B of the cooling water heating device for a battery of FIG. 7.

11 shows a configuration in which the thermal fuse is stably fixed by using an outer plate and a fuse cover forming a heating plate.

12 and 13 show the heat transfer process applied to the thermal fuse according to the coolant flow state in the lower housing. FIG. 12 shows a steady state process in which direct heat transfer from the coolant to the thermal fuse is smoothly performed, and FIG. 13 It shows an abnormal state process in which heat is transferred from the heating element to the fuse plate and the thermal fuse.

14 shows a configuration that performs the function of a heat shield member of the fuse cover.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

1 to 3, the cooling water heating device for a battery according to an embodiment of the present invention is formed in a concave container shape with an open upper side, and an inlet portion 110 into which coolant flows in and an outlet portion through which cooling water is discharged. The lower housing 100 on which the 120 is formed, the heating plate 200 coupled to cover the open upper side of the lower housing 100, and formed by the combination of the lower housing 100 and the heating plate 200 The heating member 300 provided in the inner space, the thermal fuse 400 coupled to the heating plate 200, the upper housing formed in the form of a concave container with an open lower side and coupled to the upper end of the lower housing 100 ( 500), a sealing member 600 disposed on the coupling portion of the lower housing 100 and the upper housing 500 based on the heating plate 200 and a water temperature sensor that is detachably coupled to the lower housing 100 Includes 700.

The heating member 300 is configured to supply power through a separate HV battery (not shown) having a variable range of 200 to 460V, and is connected from the HV battery to the heating member 300 by a voltage connector 810 which is an HV cable. The positive electrode cable extending from the voltage connector 810 is connected to the positive electrode of the heating member 300 through the thermal fuse 400. Meanwhile, the negative cable extending from the voltage connector 810 is connected to the negative electrode of the heating member 300. On the positive cable extending from the voltage connector 810, an ON/OFF switch for opening and closing a circuit by a control unit and a thermal fuse 400 operating according to its own temperature are connected.

The thermal fuse 400 has a structure connected to the anode cable and the anode of the heating member 300 through cold pins formed at both ends thereof, and facilitates replacement of the thermal fuse 400. When the thermal fuse 400 inserted in the power circuit is opened using a cold pin, power to the heating member 300 is cut off.

The lower housing 100 is formed in the shape of a container that is concave downward and can be arranged so that the open side faces upward, and an inlet 110 through which cooling water is introduced is formed on one side in the length direction, and the cooling water is discharged on the other side in the length direction. The outlet portion 120 may be formed.

The lower housing 100 may be formed of, for example, a metal material, and may be formed of various materials or shapes.

The heating plate 200 may be coupled to the lower housing 100 in a manner that covers the open upper side of the lower housing 100 and closes the open upper opening of the lower housing 100 by the heating plate 200. Can be. It becomes a cooling water flow path through which cooling water flows in the first space, which is an internal space formed by the combination of the lower housing 100 and the heating plate 200, and when cooling water flows into the inlet pipe, the lower housing 100 ) May be configured to pass through the first space and be discharged through an outlet pipe, which is the outlet 120.

The heating plate 200 has a structure in contact with the heating member 300 on the lower side and the thermal fuse 400 on the upper side. Through the above structure, it functions to transfer heat from the heating member 300 to the thermal fuse 400.

The heating plate 200 is formed stacked on the upper surface of the main plate 210 and the main plate 210 having a structure that directly contacts the upper end of the heating member 300 and covers the open upper side of the lower housing 100. In the state, it includes an outer plate 220 on which a fuse mounting portion 221 for mounting the thermal fuse 400 is formed.

The heating member 300 may be a heating element of various types and forms capable of generating heat, and as an example, a sheath heater may be used. The heating member 300 includes a heating element that converts electrical energy into thermal energy by resistance when current flows, and an insulator that electrically insulates the heating element from the outside and transfers heat from the heating element to the outside. The heating element may be a nichrome wire, and the insulator may be a magnesium oxide (Mgnesium Oxide). The heating member 300 has a shape of a heater tube made of a heating element and an insulator, thereby increasing a contact area with the heat exchange fluid, thereby enabling efficient heat exchange.

Sheath heater is an electric heating heater that can generate heat by electric resistance because the electric heating wire is embedded in the protective tube.The heating wire is embedded in a metal protective tube in a coil shape, and magnesium oxide, an insulating powder, is filled together to insulate the heating wire and the protective tube. Is the heater. Such a sheath heater may be formed in a coil shape made by winding a heater having a long tubular length several times, and may be formed in various forms. The heating member 300 may be disposed under the heating plate 200 to be provided inside the lower housing 100, and the heating member 300 has both ends in the longitudinal direction to be coupled to the heating plate 200 to be fixed. I can. In addition, both ends of the heating member 300 in the longitudinal direction may be formed to penetrate the heating plate 200 and protrude upwardly than the upper surface of the heating plate 200, and both ends of the heating member 300 are wound in a coil shape. It is formed in a straight line shape upward from both ends of the portion so that the straight portion may be coupled to pass through the heating plate 200. At this time, a straight portion through which the heating member 300 passes through the heating plate 200 may be coupled to the heating plate 200 by welding, so that the coupling portion may be sealed, and the heating member 300 is formed by using a sealing material. It is also possible to make the part penetrating the air tight.

The thermal fuse 400 may be formed of a bimetal or the like capable of controlling an operation by blocking a current flowing when the temperature reaches a specific temperature or higher, and the thermal fuse 400 may be coupled to contact the heating plate 200. Specifically, the thermal fuse 400 may be a bimetal temperature control switch made of two types of metals having different thermal expansion coefficients, and the thermal expansion coefficient employed in the thermal fuse 400 is a stability criterion for the heat transferred from the heating member 300 When a temperature exceeding the above is reached, the power-off function may be exerted.

In this case, the thermal fuse 400 may be partially inserted into the receiving groove 211 formed concave from the upper surface of the heating plate 200 to the lower side and disposed to contact the upper surface of the main plate 210. In addition, a voltage connector 810 and a ground connector 820 may be formed on the upper housing 500 as shown, and the

connectors

810 and 820 may be electrically connected to the heating plate 200.

The upper housing 500 may be formed of, for example, a plastic material, and may be formed in the shape of a container concave upward and disposed so that the open side faces downward. The upper housing 500 may be coupled to the upper end of the lower housing 100. For example, the upper end of the lower housing 100 and the upper end of the upper housing 500 may be arranged to be in contact with each other, and a plurality of fastening holes are formed at the upper end of the lower housing 100 by being spaced along the circumference, and the upper housing 500 ) Has a through hole formed at a position corresponding to the plurality of fastening holes, and can be coupled by a separate fastening means.

A thermal fuse 400 or the like may be provided in a second space, which is an internal space formed by combining the upper housing 500 and the heating plate 200.

4 and 5, the main plate 210 is coupled to the upper surface of the heating plate 200 by inserting and coupling a portion of the lower end of the thermal fuse 400 into a recess 211 formed concave from the upper surface to the lower side. It is arranged to contact the fuse 400. Meanwhile, an insertion fastener 213 having a separate structure may be disposed on the receiving groove 211 to insert the lower end of the thermal fuse 400.

The outer plate 220 has a fuse mounting portion 221 bent upward in order to stably fix the thermal fuse 400 through coupling with the fuse cover 410. A coupling hole 223 for fixing the coupling protrusion 411 formed on the fuse cover 410 is formed on the fuse mounting portion 221.

The fuse cover 410 may be a structure having a hollow shape in which the upper and lower portions are opened. Specifically, a coupling protrusion 411 that is fitted from the inside to the outside into the coupling hole 223 formed in the fuse mounting portion 221 And a stepped portion 413 bent in a manner to surround the upper edge of the thermal fuse 400.

The way they are combined is as follows. In the state where the thermal fuse 400 is inserted through the fuse mounting portion 221 bent upward in the outer plate 220, the lower end of the thermal fuse 400 is placed on the receiving groove 211 formed in the main plate 210. Arrange to settle. In the above state, the fuse cover 410 is inserted into the space between the fuse mounting portion 221 having elasticity and the thermal fuse 400. The coupling protrusion 411 and the stepped portion 413 each have a stable coupling structure through the coupling hole 223 and the thermal fuse 400 at the top.

On the other hand, the fuse cover 410 may have a structure that extends outward as a whole as it goes downward, and the coupling protrusion 411 is a generally rounded shape and has a shape whose diameter gradually decreases toward the outside. That is, the fuse cover 410 is pushed to the end to have a stronger fastening structure through the shape of the fuse cover 410 and the coupling protrusion 411 in a state in which the stepped portion 413 and the upper end of the thermal fuse 400 are in contact.

As described above, according to the present invention, a thermal fuse is mounted on a heating plate having a double-stacked plate structure, and the thermal fuse is stably installed through an outer plate forming the heating plate and a fuse mounting portion bent upward on the outer plate. It is to provide a bonding structure that allows it to be fixed.

The heating plate 200 may be formed of a flat plate made of a metal material, and may be formed of various materials or shapes.

Meanwhile, the heating plate 200 may include a controller function. The controller serves to control the operation of the heating member 300, and both ends of the heating member 300 may be coupled to the controller to be electrically connected.

Hereinafter, a structure for preventing damage that may occur due to interference with surroundings when the water temperature sensor 700 is coupled to the lower housing 100 will be described with reference to FIG. 6.

The lower housing 100 includes a sensor fastener 130 protruding and a clamp ring 140 for preventing separation of the water temperature sensor 700 coupled to the sensor fastener 130. The sensor fastener 130 is formed to protrude to the outside of the lower housing 100 in a state in communication with the inner space of the lower housing 100, and has a hollow pipe shape for insertion of the water temperature sensor 700 ( 131 and an interference preventing device 133 protruding outwardly on the side surface of the fastening body 131. The interference preventing device 133 is formed on the outer circumferential surface of the fastening body 131 so that a pair has a predetermined distance along its length direction. The clamp ring 140 is fastened on the fastening body 131 in a state inserted through the space between the pair of interference preventing devices 133. That is, in a state in which the water temperature sensor 700 is coupled to the fastening body 131, a ring through hole formed on the outer peripheral surface of the fastening body 131 among the spaces between the pair of interference prevention holes 133 (not shown) Through the clamp ring 140 is bound to the water temperature sensor 700.

7 to 9, the cooling water heating device for a battery having a plate heat deformation prevention structure according to another embodiment of the present invention is formed in a concave container shape with an open upper side, and an inlet portion 110 into which coolant is introduced. The lower housing 100 having the outlet 120 from which the cooling water is discharged, the heating plate 200 coupled to cover the open upper side of the lower housing 100, and the lower housing 100 and the heating plate 200 The heating member 300 provided in the inner space formed by the combination of), the thermal fuse 400 coupled to the heating plate 200, the lower side is formed in a concave container shape with an open upper end of the lower housing 100 The upper housing 500 coupled to the heating plate 200 can be separated on the sealing member 600 and the lower housing 100 disposed on the coupling portion of the lower housing 100 and the upper housing 500 based on the heating plate 200 It includes a water temperature sensor (not shown) that is coupled to each other.

Hereinafter, a description of the same configuration as that of the above-described embodiment of the cooling water heating device for a battery (FIGS. 1 to 5) will be omitted.

10 and 11, the heating plate 200 is seated in the main plate 210 having a structure covering the open upper side of the lower housing 100 and the plate hole 212 formed in the main plate 210. And a fuse plate 220 on which the thermal fuse 400 is mounted in the state.

The fuse plate 220 has a fuse seating portion 222 that is an area protruding downward, for example, pressing on the central portion of a panel having a rectangular rectangular shape in which a round is formed on an outer corner portion as a whole. By doing so, it is possible to form a fuse seating portion having a predetermined height difference from the peripheral portion.

The thermal fuse 400 is disposed in the fuse seating portion 222 formed concave from the upper surface of the fuse plate 220 to the lower side, so that heat from the heating member 300 can be directly transmitted through only the fuse plate 220. have.

As an example, the fuse seating portion 222 may have the same height as the lower end of the main plate 210. In the above, the heating member 300 contacts the lower ends of the main plate 210 and the fuse plate 220 so that heat transfer is achieved.

Meanwhile, as another example, the fuse seating portion 222 is set to have a lower position than the lower end of the main plate 210. In the above, the heating member 300 contacts only the lower end of the fuse plate 220 so that heat is transferred, whereas the heating member 300 prevents contact on the lower end of the main plate 210 so that the thermal fuse 400 through the fuse plate 220 It may be in the form of intensive heat transfer to the phase.

The thermal fuse 400 may be disposed in a fuse seating portion formed concave from the upper surface of the fuse plate 220 to the lower side so that heat from the heating member 300 may be directly transmitted through only the fuse plate 220.

The fuse plate 220, the thermal fuse 400 seated on the fuse plate 220, the fuse cover 410 fitted on the thermal fuse 400, and the fuse cover 410 and the heating plate 200 are connected and fastened. The fastening structure between the fixing clips 420 will be described.

The fuse plate 220 is arranged to enable thermal transfer between the thermal fuse 400 and the heating member 300 by inserting and coupling the lower end of the thermal fuse 400 to the fuse seating portion 222 formed concave from the top to the bottom. do.

The fuse cover 410 may be a structure having a hollow shape in which the lower part is opened. Specifically, the cover body 411 and the cover body 411 in the shape of a hollow box accommodating the thermal fuse 400 therein It includes a pressing protrusion 413 protruding on the inner upper surface.

The way they are combined is as follows. In a state in which the thermal fuse 400 is placed in the fuse seating portion 222 grooved downward on the central portion of the fuse plate 220, the fuse cover 410 is coupled to the thermal fuse 400 by covering it. In the above state, the fuse cover 410 is fixed on the heating plate 200 through the fixing clip 420. The fixing clip 420 has a pressing portion 422 fastened on an upper end of the fuse cover 410 and a hook portion 424 extending downward from both ends of the pressing portion. The hook portion has a shape extending so as to have a predetermined elastic force from the pressing portion, and through the process of fixing the hook portion to the top of the heating plate 200, the pressing protrusion of the cover body presses the thermal fuse 400 downward. Thus, the adhesion to the fuse plate 220 is increased.

12 and 13, in a state where the thickness of the fuse plate is kept smaller than that of the main plate, heat transfer to the thermal fuse mounted on the top of the fuse plate is controlled according to whether the coolant supplied to the lower housing flows normally. A structure that makes it smooth and improves the reaction speed of the thermal fuse will be described.

First, referring to FIG. 12, it can be seen a normal state in which the coolant flows smoothly into the lower housing 100. In the normal state, sufficient coolant flows in the lower housing, and thus, through the fuse plate 220 Heat transfer from the cooling water becomes effective. That is, under a structure in which the heating element 300 is sufficiently immersed in the cooling water so that the upper limit of the cooling water reaches the lower end of the fuse plate 220, the cooling water is transferred from the cooling water to the thermal fuse 400 through a fuse plate having a thin thickness. Enable heat transfer. Through this, in a state in which the coolant flows normally, heat supplied through the heating element is smoothly transferred to the coolant, thereby preventing abnormally high temperature heat from being transferred to the thermal fuse.

On the other hand, referring to FIG. 13, it can be seen an abnormal state in which the cooling water does not flow smoothly to the lower housing. In the abnormal state, insufficient cooling water flows in the lower housing, and heat transfer from the cooling water through the fuse plate This will not be done effectively. That is, under the state in which the upper part of the heating element is not immersed in the cooling water and the non-contact structure between the fuse plate and the cooling water, the high-temperature heat generated from the heating element is directly transferred to the thermal fuse through a fuse plate having a thin thickness. The thermal fuse can detect an immediate abnormal overheat condition.

Meanwhile, referring to FIG. 14, the fuse cover 410 functions as a heat shield member.

The heat shield member 410 may be manufactured in a state including a material having a heat shielding function or by coating a heat shielding material on the inner and outer surfaces of the material itself.

Through the configuration as described above, heat transferred from the heating member 300 to the thermal fuse 400 through the fuse plate 220 is completely temperature in a state where emission to the outside by the heat shield member 410 is blocked. Only the fuse 400 has its thermal effect. Through this, when it is determined that the heating temperature of the heating member 300 exceeds a preset limit temperature, the thermal fuse 400 is controlled to stop the operation.

That is, the heat detection performance of the thermal fuse 400 is improved by increasing the response operation time of the thermal fuse 400 by blocking heat dissipation by the heat shield member 410.

The heat shield member 410 is inserted between the elastic fixing clip 420 and the thermal fuse 400. The heating plate 200 may be formed of a flat plate made of a metal material, and may be formed of various materials or shapes.

Although the present invention has been described through the above embodiments, the present invention is not limited thereto. The above embodiments may be modified or changed without departing from the spirit and scope of the present invention, and those skilled in the art will recognize that such modifications and changes also belong to the present invention.

Claims

A lower housing 100 having an inlet portion 110 through which cooling water is introduced and an outlet portion 120 through which the cooling water is discharged;

A heating plate 200 coupled to cover and close the open upper side of the lower housing 100;

A heating member 300 provided in an inner space formed by a combination of the lower housing 100 and the heating plate 200;

A thermal fuse 400 coupled to the heating plate 200; And

Includes; an upper housing 500 coupled to the upper end of the lower housing 100,

The heating plate 200 contacts the upper end of the heating member 300 and covers the open upper side of the lower housing 100 on the main plate 210 and the upper surface of the main plate 210. In a stacked state, an outer plate 220 having a fuse mounting portion 221 bent upward for mounting of the thermal fuse 400 is formed,

A coupling hole formed through the fuse mounting part 221 in a state in which the fuse cover 410, which is a structure having a hollow shape having an open upper and lower part, is inserted into the space between the thermal fuse 400 and the fuse mounting part 221 The thermal fuse 400 is stably coupled to the heating plate 200 through a structure in which the coupling protrusion 411 formed on the fuse cover 410 is fitted on the 223,

Cooling water heating device for batteries with improved thermal fuse coupling structure.
The method of claim 1,

The cooling water heating device for the battery,

A water temperature sensor 700 detachably coupled to the lower housing 100; further includes,

A sensor fastener 130 protruding into a hollow shape on the lower housing 100 and a clamp ring 140 for preventing separation of the water temperature sensor 700 coupled to the sensor fastener 130,

The sensor fastener 130 is formed to protrude to the outside of the lower housing 100 in a state in communication with the inner space of the lower housing 100, and is in the form of a hollow pipe for insertion of the water temperature sensor 700 Having a fastening body 131 having and an interference preventing tool 133 protruding outwardly on a side surface of the fastening body 131,

A cooling water heating device for batteries having a structure to prevent separation of the temperature sensor.
The method according to claim 1 or 2,

The fuse cover 410 is bent in such a manner that it surrounds the upper edge of the thermal fuse 400 and the coupling protrusion 411 that is fitted from the inside to the outside in the coupling hole 223 formed in the fuse mounting part 221 Including a step portion 413 to be formed,

Cooling water heating device for batteries with improved thermal fuse coupling structure.
The method of claim 3,

The main plate 210 includes a receiving groove 211 formed concave from the upper surface to the lower side, and a portion of the lower end of the thermal fuse 400 is inserted into the receiving groove 211 and coupled to the heating plate 200. ) Arranged to contact the upper surface of the thermal fuse 400,

Cooling water heating device for batteries with improved thermal fuse coupling structure.
A lower housing 100 having an inlet portion 110 through which cooling water is introduced and an outlet portion 120 through which the cooling water is discharged;

A heating plate 200 coupled to cover and close the open upper side of the lower housing 100;

A heating member 300 provided in an inner space formed by the combination of the lower housing 100 and the heating plate 200;

A thermal fuse 400 coupled to the heating plate 200; And

Includes; an upper housing 500 coupled to the upper end of the lower housing 100,

When the heating plate 200 is seated on the main plate 210 having a structure covering the open upper side of the lower housing 100 and the plate hole 212 formed in the main plate 210, the thermal fuse ( Including a fuse plate 220 on which 400) is mounted,

A method in which the fuse cover 410 is covered on the thermal fuse 400 in a state in which the thermal fuse 400 is placed in a fuse seating portion 222 grooved downward on the central portion of the fuse plate 220 Characterized in that combined with,

Cooling water heating device for batteries with plate heat deformation prevention structure.
The method of claim 5,

Heat transferred from the heating member 300 to the thermal fuse 400 through the fuse plate 220 is blocked from being discharged to the outside by a heat shield member 410 fitted on the thermal fuse 400 In this state, when it is determined that the heating temperature of the heating member 300 exceeds a preset limit temperature, the thermal fuse 400 is controlled to stop the operation,

Cooling water heating device for batteries with plate heat deformation prevention structure.
The method of claim 5,

The thickness of the fuse plate 220 is kept smaller than that of the main plate 210,

Cooling water heating device for batteries with plate heat deformation prevention structure.
The method according to any one of claims 5 to 7,

The lower end of the fuse seating portion 222 is set to have the same height as the lower end of the main plate 210 or lower than the lower end of the main plate 210,

Cooling water heating device for batteries with plate heat deformation prevention structure.
The method of claim 8,

The fuse cover 410 is a structure having a hollow shape having a structure in which the lower part is opened, a cover body having a shape of a hollow box accommodating the thermal fuse 400 therein, and a pressing protrusion protruding on the inner upper surface of the cover body Containing,

Cooling water heating device for batteries with plate heat deformation prevention structure.