A liquid cooling plate structure with PTC heating

Abstract

The utility model relates to the technical field of battery packs, specifically a liquid cooling plate structure with PTC heating, including a liquid cooling plate with a fluid channel, wherein the two ends of the liquid cooling plate are respectively provided with a liquid inlet and a liquid outlet, wherein the liquid inlet is provided with a liquid inlet pipe assembly, and the liquid outlet is provided with a liquid outlet pipe; the liquid inlet pipe assembly includes a first liquid inlet pipe with a first solenoid valve, and a second liquid inlet pipe is connected in parallel to the first liquid inlet pipe corresponding to the two ends of the first solenoid valve, and the second liquid inlet pipe is provided with a second solenoid valve and a PTC heating film; the first solenoid valve, the second solenoid valve and the PTC heating film are respectively connected to an external electric control module; the liquid inlet port of the first liquid inlet pipe and the liquid outlet port of the liquid outlet pipe are respectively connected to an external coolant circulation device. This solution can realize both the separate cooling of the battery cell module and the separate heating of the battery cell module without affecting each other, and can effectively improve the service life of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a liquid cooling plate structure with PTC heating. Background Art

[0002] At present, new energy vehicles have attracted wide attention from all walks of life due to their excellent environmental performance. The requirements for new energy vehicles are also constantly increasing. As a new energy vehicle, electric vehicles are also developing in the direction of high safety, high energy ratio and light weight. The main factor that determines the mileage of electric vehicles is the power supply battery. Different specifications of power supply batteries can be selected for different models to meet driving requirements.

[0003] The power supply battery used in electric vehicles is generally a battery pack composed of multiple battery cell modules, that is, multiple battery modules are stacked up and down in the same box, and then the battery cell modules are connected.

[0004] According to the type of battery, it can be divided into ternary battery and lithium iron phosphate, etc. Due to the characteristics of these two batteries, when they are used at low temperatures, the battery cell module needs to be heat treated. The existing solutions mostly use a layer of heating film on the bottom side of the battery cell module for bottom heating. Although this structure can achieve the heating of the battery cell module at low temperatures, the battery will generate a lot of heat when working at normal temperature, so the battery also needs to be cooled down. Replacing the heating film pre-installed under the battery cell module will obviously cause inconvenience in operation and troublesome disassembly.

[0005] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned problems of the prior art and provide a liquid cooling plate structure with PTC heating, which is used to solve the technical problem that the traditional technology cannot cool the battery cell module at normal temperature and preheat the battery cell module at low temperature without changing the bottom structure of the battery cell module.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A liquid cooling plate structure with PTC heating comprises a liquid cooling plate with a fluid channel, wherein a liquid inlet and a liquid outlet are respectively arranged at two ends of the liquid cooling plate, the liquid inlet is provided with a liquid inlet pipe assembly, and the liquid outlet is provided with a liquid outlet pipe; the liquid inlet pipe assembly comprises a first liquid inlet pipe with a first solenoid valve, and a second liquid inlet pipe is connected in parallel to the first liquid inlet pipe corresponding to the two ends of the first solenoid valve, and the second liquid inlet pipe is provided with a second solenoid valve and a PTC heating film; the first solenoid valve, the second solenoid valve and the PTC heating film are respectively connected to an external electronic control module; the liquid inlet port of the first liquid inlet pipe and the liquid outlet port of the liquid outlet pipe are respectively connected to an external coolant circulation device.

[0009] Furthermore, the liquid cooling plate is in a rectangular shape, and the liquid inlet and the liquid outlet are located at two ends of a diagonal line.

[0010] Furthermore, the first liquid inlet pipe comprises a first liquid inlet pipe section A and a first liquid inlet pipe section B which are connected to each other, and the second liquid inlet pipe is connected in parallel with the first liquid inlet pipe section B.

[0011] Furthermore, the first liquid pipe section A is a right-angle tube, one end of which is vertically connected to the liquid inlet, and the other end of which is vertically connected to the first liquid inlet pipe section B.

[0012] Furthermore, the first liquid inlet pipe section B and the second liquid inlet pipe are both located on the same side of the battery cell module.

[0013] Furthermore, the first liquid inlet pipe section B and the second liquid inlet pipe are both parallel to the liquid cooling plate.

[0014] Furthermore, the second liquid inlet pipe is arranged at the lower side of section B of the first liquid inlet pipe.

[0015] Furthermore, the second solenoid valve and the PTC heating film are arranged at any position of the second liquid inlet pipe without intersecting each other.

[0016] Furthermore, the second solenoid valve is arranged at any position of the second liquid inlet pipe, and the PTC heating film wraps the outer side of the second solenoid valve.

[0017] Furthermore, the liquid cooling plate comprises a lower cover plate and an upper cover plate which are buckled with each other, and the fluid channel is arranged on the surface of the lower cover plate.

[0018] Beneficial Effects

[0019] The utility model provides a liquid cooling plate structure with PTC heating, which can cool down the battery cell module in a normal temperature environment and preheat the battery cell module in a low temperature environment by switching the first solenoid valve and the second solenoid valve without changing the bottom structure of the battery cell module. This solution is not only simple in structure and easy to process, but also occupies a small space. It can realize the separate cooling and heating of the battery cell module without affecting each other, which can effectively improve the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a liquid cooling plate structure with PTC heating described in the utility model;

[0021] Figure 2 This is an exploded view of a liquid cooling plate structure with PTC heating according to the utility model;

[0022] Figure 3 This is a schematic diagram of the application of a liquid cooling plate structure with PTC heating described in the utility model.

[0023] Graphic marking:

[0024] 1-liquid cooling plate, 101-upper cover plate, 102-lower cover plate, 103-fluid channel, 104-liquid inlet, 105-liquid outlet;

[0025] 2-liquid outlet pipe, 201-liquid outlet port;

[0026] 3-liquid inlet pipe assembly, 301-first solenoid valve, 302-second solenoid valve, 303-first liquid inlet pipe, 304-second liquid inlet pipe, 305-PTC heating film, 306-liquid inlet port, 307-first liquid inlet pipe section A, 308-first liquid inlet pipe section B;

[0027] 4-Battery cell module. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below based on the accompanying drawings and embodiments. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 and Figure 2As shown, the present scheme provides a liquid cooling plate structure with PTC heating, including a liquid cooling plate 1 with a fluid channel 103, wherein a liquid inlet 104 and a liquid outlet 105 are respectively arranged at two ends of the liquid cooling plate 1, wherein the liquid inlet 104 is provided with a liquid inlet pipe assembly 3, and the liquid outlet 105 is provided with a liquid outlet pipe 2; the liquid inlet pipe assembly 3 includes a first liquid inlet pipe 303 with a first solenoid valve 301, and a second liquid inlet pipe 304 is connected in parallel to the first liquid inlet pipe 303 corresponding to the two ends of the first solenoid valve 301, and the second liquid inlet pipe 304 is provided with a second solenoid valve 302 and a PTC heating film 305; the first solenoid valve 301, the second solenoid valve 302 and the PTC heating film 305 are respectively connected to an external electric control module; the liquid inlet port 306 of the first liquid inlet pipe 303 and the liquid outlet port 201 of the liquid outlet pipe 2 are respectively connected to an external coolant circulation device to realize circulating liquid supply.

[0030] It should be noted that the PTC heating film 305 described in this embodiment is a new type of heating element with the characteristics of a positive temperature coefficient PTC. When current passes through the PTC heating film, it generates heat, and as the temperature rises, its resistance value will also increase. This characteristic enables the PTC heating film to have a self-limiting temperature function, that is, when the temperature reaches a certain value, the current will automatically decrease to avoid overheating. It is mainly composed of a ceramic matrix and a conductive layer. The ceramic matrix is ​​usually made of materials such as aluminum oxide and zinc oxide, and has good insulation and high temperature resistance. The conductive layer is made of metal oxides such as silver, nickel, etc. or materials such as silicon carbide, and has good conductivity and corrosion resistance.

[0031] As an optimization of the liquid cooling plate 1 in this embodiment, the liquid cooling plate 1 includes a lower cover plate 102 and an upper cover plate 101 that are interlocked, the surface of the lower cover plate 102 is provided with the fluid channel 103, and the surface of the upper cover plate 101 is used to install the battery cell module 4.

[0032] like Figure 3 As shown, the working principle:

[0033] Under normal conditions, the second solenoid valve 302 and the PTC heating film 305 remain closed, the first solenoid valve 301 is turned on, and the coolant enters the first liquid inlet pipe 303 through the liquid inlet port 306, flows through the fluid channel of the liquid cooling plate 1, enters the liquid outlet pipe 2, and flows out through the liquid outlet port 201. Because a coolant circulation device is provided externally, the coolant will circulate to cool the battery cell module 4 on the liquid cooling plate 1.

[0034] In a low temperature environment, the battery cell module 4 needs to be heated, so the first solenoid valve 301 is controlled to be closed, the second solenoid valve 302 is turned on, and the PTC heating film 305 is powered on for heating, so as to heat the second liquid inlet pipe 304 section, thereby causing the coolant flowing through this section to be continuously heated. The heated coolant flows through the fluid channel 103 of the liquid cooling plate and then enters the liquid outlet pipe 2, and flows out through the liquid outlet port 201. Because a coolant circulation device is provided externally, the coolant will circulate to achieve heating of the battery cell module 4 on the liquid cooling plate.

[0035] In this embodiment, the liquid cooling plate 1 is in a rectangular shape, and the liquid inlet 104 and the liquid outlet 105 are located at two ends of a diagonal line.

[0036] Among them, Figure 1 and Figure 2 As shown, the first liquid inlet pipe 307 includes a first liquid inlet pipe section A 307 and a first liquid inlet pipe section B 308 which are connected to each other, and the second liquid inlet pipe 304 is connected in parallel with the first liquid inlet pipe section B 308 .

[0037] As an optimization of this solution, the first liquid inlet pipe section A 307 is a right-angle tube, one end of which is vertically connected to the liquid inlet 104 , and the other end of which is vertically connected to the first liquid inlet pipe section B 308 .

[0038] In addition, the first liquid inlet pipe section B 308 and the second liquid inlet pipe 304 are both located on the same side of the battery cell module 4 , and this structure will not affect the installation of the battery cell module 4 .

[0039] As a further optimization of the present solution, the first liquid inlet pipe section B 308 and the second liquid inlet pipe 304 are both parallel to the liquid cooling plate 1 , and this structure can ensure the overall beauty of the present structure.

[0040] In this embodiment, the second liquid inlet pipe 304 is arranged at the lower side of the first liquid inlet pipe B section 308, and this structure can prevent an outsider from accidentally touching and causing burns. In addition, the liquid outlet pipe 2 and the top of the first liquid inlet pipe 303 are level.

[0041] In this embodiment, there are two ways to install the second solenoid valve 302 and the PTC heating film 305:

[0042] The first one is that the second solenoid valve 302 and the PTC heating film 305 are arranged at any position of the second liquid inlet pipe 304 without intersecting each other.

[0043] The second type is that the second solenoid valve 302 is arranged at any position of the second liquid inlet pipe 304 , and the PTC heating film 305 wraps the outer side of the second solenoid valve 302 .

[0044] The above description is only for illustrating the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid cooling plate structure with PTC heating, characterized in that: The invention comprises a liquid cooling plate (1) with a fluid channel (103); a liquid inlet (104) and a liquid outlet (105) are respectively arranged at two ends of the liquid cooling plate (1); the liquid inlet (104) is provided with a liquid inlet pipe assembly (3); the liquid outlet (105) is provided with a liquid outlet pipe (2); the liquid inlet pipe assembly (3) comprises a first liquid inlet pipe (303) with a first electromagnetic valve (301); and the first liquid inlet pipe (303) corresponding to the two ends of the first electromagnetic valve (301) is provided with a first electromagnetic valve (301). 03) is connected in parallel with a second liquid inlet pipe (304), and a second solenoid valve (302) and a PTC heating film (305) are arranged on the second liquid inlet pipe (304); the first solenoid valve (301), the second solenoid valve (302) and the PTC heating film (305) are respectively connected to an external electric control module; the liquid inlet port (306) of the first liquid inlet pipe (303) and the liquid outlet port (201) of the liquid outlet pipe (2) are respectively connected to an external coolant circulation device.

2. A liquid cooling plate structure with PTC heating according to claim 1, characterized in that: The liquid cooling plate (1) is in the shape of a rectangle, and the liquid inlet (104) and the liquid outlet (105) are located at two ends of a diagonal line.

3. A liquid cooling plate structure with PTC heating according to claim 1 or 2, characterized in that: The first liquid inlet pipe (303) comprises a first liquid inlet pipe section A (307) and a first liquid inlet pipe section B (308) which are connected to each other, and the second liquid inlet pipe (304) is connected in parallel with the first liquid inlet pipe section B (308).

4. A liquid cooling plate structure with PTC heating according to claim 3, characterized in that: The first liquid inlet pipe section A (307) is a right-angle tube, one end of which is vertically connected to the liquid inlet (104), and the other end of which is vertically connected to the first liquid inlet pipe section B (308).

5. The liquid cooling plate structure with PTC heating according to claim 3, characterized in that: The first liquid inlet pipe section B (308) and the second liquid inlet pipe (304) are both located on the same side of the battery cell module (4).

6. The liquid cooling plate structure with PTC heating according to claim 3, characterized in that: The first liquid inlet pipe section B (308) and the second liquid inlet pipe (304) are both parallel to the liquid cooling plate (1).

7. The liquid cooling plate structure with PTC heating according to claim 3, characterized in that: The second liquid inlet pipe (304) is arranged at the lower side of the first liquid inlet pipe section B (308).

8. The liquid cooling plate structure with PTC heating according to claim 1, characterized in that: The second solenoid valve (302) and the PTC heating film (305) are arranged at any position of the second liquid inlet pipe (304) without intersecting each other.

9. The liquid cooling plate structure with PTC heating according to claim 1, characterized in that: The second solenoid valve (302) is arranged at any position of the second liquid inlet pipe (304), and the PTC heating film (305) wraps the outside of the second solenoid valve (302).

10. The liquid cooling plate structure with PTC heating according to claim 1, characterized in that: The liquid cooling plate (1) comprises a lower cover plate (102) and an upper cover plate (101) which are buckled together, and the fluid channel (103) is provided on the surface of the lower cover plate (102).

Images