PTC (Positive Temperature Coefficient) water heater for automobile power battery

Abstract

The invention discloses a PTC water heater for an automobile power battery, and relates to the technical field of automobile battery heating, the PTC water heater comprises a water tank, the upper end of the water tank is provided with a tank cover, the inner top wall of the tank cover is provided with a water outlet groove, and the inner wall of the water outlet groove is provided with an impeller groove communicated with the outside; a water outlet pipe communicated with the impeller groove is connected to the side wall of the tank cover, a water inlet pipe is connected to the lower portion of the side wall of the water tank, a battery heat exchange mechanism connected with the water outlet pipe and the water inlet pipe is arranged on one side of the water tank, and a heating mechanism is arranged in the water tank. According to the invention, when the temperature of the water body is low during starting, the water body can be automatically subjected to circulating soaking, the heating efficiency of the water body is effectively improved, the temperature of the water body is increased more quickly, and when the temperature of the water body is increased, the driving process of the heating mechanism is automatically released, so that the energy consumption can be reduced, and the purpose of saving energy can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile battery heating, and in particular to a PTC water heater for an automobile power battery. Background Art

[0002] With the increasing attention paid to environmental protection and energy conservation around the world, electric vehicles are gradually becoming the mainstream of the future automobile market due to their clean and low-carbon characteristics. However, the endurance and comfort of electric vehicles in cold weather are still the focus of consumers, and car batteries need to be heated in cold weather. PTC water heaters are heaters made of positive temperature coefficient materials. The main principle is that when current passes through PTC materials, the resistance of the material increases with the increase of temperature, thereby generating heat. This heater is usually composed of PTC components, water channels, heat exchangers and other parts.

[0003] However, existing PTC water heaters often face problems of low heating efficiency and uneven water temperature distribution at the initial startup, especially when the water temperature is low. This is mainly because the thermal conductivity efficiency of water is low at low temperatures, coupled with insufficient heat exchange between the heater surface and the water, resulting in a slow heating process.

[0004] In summary, in order to overcome the problems of low heating efficiency, uneven water temperature distribution, and large energy waste in the existing automobile power battery heating system, a PTC water heater for automobile power batteries is designed and proposed. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a PTC water heater for an automotive power battery.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A PTC water heater for an automotive power battery comprises a water tank, a tank cover is installed at the upper end of the water tank, a water outlet groove is provided on the inner top wall of the tank cover, an impeller groove connected to the outside is provided on the inner wall of the water outlet groove, a water outlet pipe connected to the impeller groove is connected to the side wall of the tank cover, a water inlet pipe is connected to the lower part of the side wall of the water tank, a battery heat exchange mechanism connected to the water outlet pipe and the water inlet pipe is provided on one side of the water tank, a heating mechanism is provided inside the water tank, a device groove is provided on the side wall of the tank cover, and a temperature control drive mechanism connected to the heating mechanism is provided inside the device groove.

[0007] As a further improvement of the present invention, the battery heat exchange mechanism includes a vehicle battery shell, a serpentine tube is fixed inside the vehicle battery shell, and the two ends of the serpentine tube are respectively connected to a first circulation tube and a second circulation tube, and the ends of the first circulation tube and the second circulation tube away from the serpentine tube both penetrate the inner wall of the vehicle battery shell and extend to the outside of the vehicle battery shell, the first circulation tube is connected to a water outlet pipe, and a water pump is connected between the second circulation pipe and the water inlet pipe.

[0008] As a further improvement of the present invention, the heating mechanism includes a guide tube arranged inside the water tank, a mounting bracket is fixed to the upper end of the guide tube, a first rotating rod is fixed to the upper end of the mounting bracket, the upper end of the first rotating rod passes through the inner top wall of the water outlet trough and extends to the interior of the device trough, and the first rotating rod is rotatably connected to the inner top wall of the water outlet trough, the upper end of the first rotating rod is connected to a power connecting wire through a rotating power-carrying connector, the power connecting wire passes through the inner wall of the device trough and extends to the outside of the box cover, a spoiler rod is fixed on the outer wall of the guide tube, a spiral heating plate is fixedly installed on the inner wall of the guide tube, and a heating rod is fixedly installed on the inner top wall of the mounting bracket.

[0009] As a further improvement of the present invention, the temperature control driving mechanism includes a fixed cylinder fixed on the inner bottom wall of the device groove, a heat transfer block located inside the fixed cylinder is fixedly embedded on the inner bottom wall of the device groove, a movable block is slidably inserted on the upper end of the fixed cylinder, an expansion liquid storage bag located between the movable block and the heat transfer block is provided inside the fixed cylinder, a movable plate is fixed on the upper end of the movable block, a tension spring is sleeved on the outer side of the fixed cylinder, one end of the tension spring is fixed to the lower end of the movable plate, and the other end of the tension spring is fixed to the inner bottom wall of the device groove, a plug rod rotatably connected to the movable plate is penetrated through the movable plate, a rectangular rod is fixed to the upper end of the plug rod, and a limiting block is fixed to the lower end of the plug rod, a second rotating rod extending to the inside of the impeller groove is penetrated through the inner bottom wall of the device groove, the second rotating rod is rotatably connected to the inner bottom wall of the device groove, a limiting groove cooperating with the limiting block is provided on the upper end of the second rotating rod, an impeller fixedly sleeved on the second rotating rod is provided inside the impeller groove, and a linkage structure connected with the first rotating rod is provided on the inner top wall of the device groove.

[0010] As a further improvement of the present invention, the linkage structure includes a sleeve rod rotatably connected to the top wall of the device groove, the rectangular rod is slidably inserted into the lower end of the sleeve rod, a second synchronous wheel is fixedly sleeved on the side wall of the sleeve rod, a first synchronous wheel is fixedly sleeved on the side wall of the first rotating rod, and the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt transmission.

[0011] As a further improvement of the present invention, a conical ring plate is fixed on the inner side wall of the mounting frame.

[0012] As a further improvement of the present invention, four mounting bolts are penetrated through the upper end of the tank cover, and the four mounting bolts are screwed to the upper end of the water tank.

[0013] Beneficial effects of the present invention: 1. By setting up a heating mechanism and driving the guide tube to rotate, the spiral heating plate and the spoiler rod can be driven to rotate. The guiding and lifting effect of the spiral heating plate can make the water move upward inside the guide tube, and then a part of the water is guided to the outside through the conical ring plate, and then moves downward along the inner wall of the water tank, and then enters the guide tube from the bottom and moves upward, so that the circulation flow of the water body can be realized, and the circulation and uniform heating effect of the water body can be achieved, so as to effectively improve the heating efficiency of the water body, and the stirring and disturbing effect of the spoiler rod on the water body can further improve the circulation and uniform heating effect of the water body.

[0014] 2. By setting a temperature control driving mechanism, when the water temperature is low, the expansion liquid storage capsule is in a contracted state. During the water circulation process, when the water flows through the impeller, it will drive the second rotating rod to rotate. At this time, the limit block is inserted into the limit groove, thereby driving the first rotating rod to rotate, and the first rotating rod can drive the guide tube to rotate. When the water temperature is low, the water can be circulated and heated, effectively improving the heating efficiency of the water and making the water temperature rise faster. When the water temperature rises, the expansion liquid storage capsule expands and stretches due to the heat, thereby pushing the movable block to move up, driving the movable plate to move up, and driving the plug rod to move up through the movable plate, thereby driving the limit block to move out of the limit groove, thereby releasing the driving process of the heating mechanism, which can reduce energy consumption.

[0015] The present invention can automatically circulate and equalize the water when the water temperature is low just after startup, effectively improving the heating efficiency of the water and making the water temperature rise faster. When the water temperature rises, the driving process of the heating mechanism is automatically released, which can reduce energy consumption and achieve the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a PTC water heater for an automotive power battery proposed by the present invention; Figure 2 This is a structural schematic diagram of a heating mechanism and a temperature control driving mechanism of a PTC water heater for an automotive power battery proposed by the present invention; Figure 3 This is a structural schematic diagram of an insertion rod, a rectangular rod, a limit block, and a sleeve rod of a PTC water heater for an automotive power battery proposed by the present invention; Figure 4 This is a structural schematic diagram of a second rotating rod, an impeller, and a limiting groove of a PTC water heater for an automotive power battery proposed by the present invention; Figure 5A schematic diagram of the partial cross-sectional structure of a heat transfer block, a fixed cylinder, a tension spring, a movable block, an expansion liquid storage capsule, a movable plate, a second rotating rod, and a rectangular rod of a PTC water heater for an automotive power battery proposed by the present invention; Figure 6 The present invention is a schematic diagram of the cross-sectional structure of a box cover of a PTC water heater for an automotive power battery.

[0017] In the figure: 1 water tank, 2 tank cover, 3 mounting bolts, 4 power connection wires, 5 device grooves, 6 water outlet pipes, 7 first circulation pipes, 8 car battery shells, 9 serpentine pipes, 10 water outlet grooves, 11 impeller grooves, 12 second circulation pipes, 13 water pumps, 14 water inlet pipes, 15 movable blocks, 16 expansion liquid storage capsules, 17 limit grooves, 18 limit blocks, 19 plug rods, 20 sleeve rods, 21 rotating power connectors, 22 first synchronous wheels, 23 synchronous belts, 24 second synchronous wheels, 25 first rotating rods, 26 mounting brackets, 27 conical ring plates, 28 guide tubes, 29 spoiler rods, 30 heating rods, 31 spiral heating plates, 32 impellers, 33 second rotating rods, 34 heat transfer blocks, 35 fixed tubes, 36 tension springs, 37 movable plates, and 38 rectangular rods. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-Figure 6 A PTC water heater for an automotive power battery comprises a water tank 1, a tank cover 2 is mounted on the upper end of the water tank 1, four mounting bolts 3 are penetrated through the upper end of the tank cover 2, and the four mounting bolts 3 are screwed on the upper end of the water tank 1, a water outlet groove 10 is arranged on the inner top wall of the tank cover 2, an impeller groove 11 communicating with the outside is arranged on the inner wall of the water outlet groove 10, a water outlet pipe 6 communicating with the impeller groove 11 is connected to the side wall of the tank cover 2, a water inlet pipe 14 is connected to the lower part of the side wall of the water tank 1, a battery heat exchange mechanism connected with the water outlet pipe 6 and the water inlet pipe 14 is arranged on one side of the water tank 1, a heating mechanism is arranged inside the water tank 1, a device groove 5 is arranged on the side wall of the tank cover 2, and a temperature control driving mechanism connected with the heating mechanism is arranged inside the device groove 5.

[0020] In the present invention, the battery heat exchange mechanism includes a car battery shell 8. During actual installation, the car battery shell 8 is installed horizontally, and the car power battery is placed inside the car battery shell 8. A serpentine tube 9 is fixed inside the car battery shell 8. The two ends of the serpentine tube 9 are respectively connected to the first circulation tube 7 and the second circulation tube 12. The ends of the first circulation tube 7 and the second circulation tube 12 away from the serpentine tube 9 both penetrate the inner wall of the car battery shell 8 and extend to the outside of the car battery shell 8. The first circulation tube 7 is connected to the water outlet pipe 6, and a water pump 13 is connected between the second circulation tube 12 and the water inlet pipe 14.

[0021] The heating mechanism includes a guide tube 28 arranged inside the water tank 1, a mounting frame 26 is fixed to the upper end of the guide tube 28, a conical ring plate 27 is fixed to the inner side wall of the mounting frame 26, and the conical ring plate 27 can play a role in guiding and diverting the water body. A first rotating rod 25 is fixed to the upper end of the mounting frame 26, and the upper end of the first rotating rod 25 passes through the inner top wall of the water outlet trough 10 and extends to the inside of the device trough 5, and the first rotating rod 25 is rotatably connected to the inner top wall of the water outlet trough 10. The upper end of the first rotating rod 25 is connected to the power connection wire 4 through the rotating power supply connector 21. The power connection wire 4 passes through the inner wall of the device groove 5 and extends to the outside of the box cover 2. A spoiler rod 29 is fixed on the outer wall of the guide tube 28. A spiral heating plate 31 is fixedly installed on the inner wall of the guide tube 28. A heating rod 30 is fixedly installed on the inner top wall of the mounting frame 26. The heating rod 30 and the spiral heating plate 31 both include a PTC heating pack, an insulating layer and a heat-conducting layer arranged in sequence from the inside to the outside.

[0022] The temperature control driving mechanism includes a fixed cylinder 35 fixed on the inner bottom wall of the device groove 5, a heat transfer block 34 located inside the fixed cylinder 35 is fixedly embedded on the inner bottom wall of the device groove 5, a movable block 15 is slidably inserted on the upper end of the fixed cylinder 35, an expansion liquid storage bag 16 located between the movable block 15 and the heat transfer block 34 is provided inside the fixed cylinder 35, and kerosene is filled inside the expansion liquid storage bag 16. The volume of kerosene changes greatly after being heated, which can make the expansion liquid storage bag 16 expand and contract in shape. A moving plate 37 is fixed on the upper end of the movable block 15, and a tension spring 36 is sleeved on the outer side of the fixed cylinder 35. One end of the tension spring 36 is fixed to the lower end of the moving plate 37, and the other end of the tension spring 36 is fixed to the inner bottom wall of the device groove 5. A plug rod 19 rotatably connected to the plug rod 19 is passed through 37, a rectangular rod 38 is fixed to the upper end of the plug rod 19, and a limiting block 18 is fixed to the lower end of the plug rod 19. A second rotating rod 33 extending to the inside of the impeller groove 11 is passed through the inner bottom wall of the device groove 5, and the second rotating rod 33 is rotatably connected to the inner bottom wall of the device groove 5. A limiting groove 17 cooperating with the limiting block 18 is provided at the upper end of the second rotating rod 33. Both the limiting block 18 and the limiting groove 17 are cross-shaped structures. The lower end corners of the limiting block 18 are rounded, and the upper end corners of the limiting groove 17 are rounded. An impeller 32 fixedly sleeved on the second rotating rod 33 is provided inside the impeller groove 11, and a linkage structure connected to the first rotating rod 25 is provided on the inner top wall of the device groove 5.

[0023] The linkage structure includes a sleeve rod 20 rotatably connected to the top wall of the device groove 5, a rectangular rod 38 is slidably inserted into the lower end of the sleeve rod 20, a second synchronous wheel 24 is fixedly sleeved on the side wall of the sleeve rod 20, and a first synchronous wheel 22 is fixedly sleeved on the side wall of the first rotating rod 25. The first synchronous wheel 22 and the second synchronous wheel 24 are connected through a synchronous belt 23.

[0024] When the present invention is used, the water pump 13 is started, water can be introduced into the water tank 1 through the water inlet pipe 14, and water can be discharged through the water outlet pipe 6, so that the water body circulates in the serpentine pipe 9 and the water tank 1, and the heating rod 30 and the spiral heating plate 31 are powered on to generate heat, so that the water body in the water tank 1 can be heated. When the hot water circulates to the serpentine pipe 9, the heat of the hot water in the serpentine pipe 9 is transferred out, so that the inside of the car battery shell 8 can be heated, and then the battery can be heated; At this time, the water temperature is low, and the expansion storage bag 16 is in a contracted state. During the water circulation process, when the water flows through the impeller 32, it will drive the impeller 32 to rotate, thereby driving the second rotating rod 33 to rotate. At this time, the limit block 18 is inserted into the limit groove 17, and the sleeve rod 20 can be driven to rotate through the rectangular rod 38. The transmission effect of the first synchronous wheel 22, the second synchronous wheel 24, and the synchronous belt 23 can be used to drive the first rotating rod 25 to rotate, and the guide tube 28 can be driven to rotate through the mounting frame 26. By driving the guide tube 28 to rotate, It can drive the spiral heating plate 31 and the spoiler rod 29 to rotate. The guiding and lifting effect of the spiral heating plate 31 can make the water move upward inside the guide tube 28, and then a part of the water is guided to the outside through the conical ring plate 27, and then moves downward along the inner wall of the water tank 1, and then enters the guide tube 28 from the bottom and moves upward, so as to realize the circulation of the water body and the circulation and uniform heating effect of the water body, thereby effectively improving the heating efficiency of the water body, and utilizing the stirring and disturbing effect of the spoiler rod 29 on the water body, which can further improve the circulation and uniform heating effect of the water body; When the water temperature rises, the expansion liquid storage capsule 16 expands and stretches due to the heat, thereby pushing the movable block 15 to move upward, driving the movable plate 37 to move upward, and driving the insertion rod 19 upward through the movable plate 37, which can drive the limit block 18 to move out of the limit groove 17, thereby releasing the driving process of the heating mechanism and reducing energy consumption.

[0025] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PTC water heater for an automotive power battery, comprising a water tank (1), characterized in that: A box cover (2) is installed at the upper end of the water tank (1); a water outlet groove (10) is provided on the inner top wall of the box cover (2); an impeller groove (11) communicating with the outside is provided on the inner wall of the water outlet groove (10); a water outlet pipe (6) communicating with the impeller groove (11) is connected to the side wall of the box cover (2); a water inlet pipe (14) is connected to the lower part of the side wall of the water tank (1); a battery heat exchange mechanism connected to the water outlet pipe (6) and the water inlet pipe (14) is provided on one side of the water tank (1); a heating mechanism is provided inside the water tank (1); a device groove (5) is provided on the side wall of the box cover (2); a temperature control drive mechanism connected to the heating mechanism is provided inside the device groove (5).

2. A PTC water heater for an automotive power battery according to claim 1, characterized in that: The battery heat exchange mechanism comprises an automobile battery shell (8), a serpentine tube (9) is fixed inside the automobile battery shell (8), two ends of the serpentine tube (9) are respectively connected to a first circulation tube (7) and a second circulation tube (12), the ends of the first circulation tube (7) and the second circulation tube (12) away from the serpentine tube (9) both penetrate the inner wall of the automobile battery shell (8) and extend to the outside of the automobile battery shell (8), the first circulation tube (7) is connected to a water outlet pipe (6), and a water pump (13) is connected between the second circulation tube (12) and a water inlet pipe (14).

3. A PTC water heater for an automotive power battery according to claim 1, characterized in that: The heating mechanism comprises a guide tube (28) arranged inside the water tank (1), a mounting frame (26) being fixed to the upper end of the guide tube (28), a first rotating rod (25) being fixed to the upper end of the mounting frame (26), the upper end of the first rotating rod (25) penetrating the inner top wall of the water outlet trough (10) and extending to the inside of the device trough (5), and the first rotating rod (25) being rotatably connected to the inner top wall of the water outlet trough (10), the upper end of the first rotating rod (25) being connected to an electric wire (4) via a rotating power supply connector (21), the electric wire (4) penetrating the inner wall of the device trough (5) and extending to the outside of the box cover (2), a spoiler rod (29) being fixed to the outer wall of the guide tube (28), a spiral heating plate (31) being fixedly mounted on the inner wall of the guide tube (28), and a heating rod (30) being fixedly mounted on the inner top wall of the mounting frame (26).

4. A PTC water heater for an automotive power battery according to claim 3, characterized in that: The temperature control drive mechanism comprises a fixed cylinder (35) fixed on the inner bottom wall of the device groove (5); a heat transfer block (34) located inside the fixed cylinder (35) is fixedly embedded on the inner bottom wall of the device groove (5); a movable block (15) is slidably inserted on the upper end of the fixed cylinder (35); an expansion liquid storage bag (16) located between the movable block (15) and the heat transfer block (34) is provided inside the fixed cylinder (35); a movable plate (37) is fixed on the upper end of the movable block (15); a tension spring (36) is sleeved on the outer side of the fixed cylinder (35); one end of the tension spring (36) is fixed to the lower end of the movable plate (37); the other end of the tension spring (36) is fixed to the inner bottom wall of the device groove (5); The movable plate (37) is provided with an insertion rod (19) rotatably connected thereto, a rectangular rod (38) is fixed to the upper end of the insertion rod (19), a limit block (18) is fixed to the lower end of the insertion rod (19), a second rotating rod (33) extending to the inside of the impeller groove (11) is provided through the inner bottom wall of the device groove (5), the second rotating rod (33) is rotatably connected to the inner bottom wall of the device groove (5), a limit groove (17) cooperating with the limit block (18) is provided at the upper end of the second rotating rod (33), an impeller (32) fixedly sleeved on the second rotating rod (33) is provided inside the impeller groove (11), and a linkage structure connected to the first rotating rod (25) is provided on the inner top wall of the device groove (5).

5. A PTC water heater for an automotive power battery according to claim 4, characterized in that: The linkage structure comprises a sleeve rod (20) rotatably connected to the top wall of the device groove (5); the rectangular rod (38) is slidably inserted into the lower end of the sleeve rod (20); a second synchronous wheel (24) is fixedly sleeved on the side wall of the sleeve rod (20); a first synchronous wheel (22) is fixedly sleeved on the side wall of the first rotating rod (25); and the first synchronous wheel (22) and the second synchronous wheel (24) are connected by a synchronous belt (23).

6. A PTC water heater for an automotive power battery according to claim 3, characterized in that: A conical ring plate (27) is fixed on the inner side wall of the mounting frame (26).

7. A PTC water heater for an automotive power battery according to claim 1, characterized in that: Four mounting bolts (3) are provided through the upper end of the tank cover (2), and the four mounting bolts (3) are screwed to the upper end of the water tank (1).

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