PTC (Positive Temperature Coefficient) heating device for heating battery module

Abstract

The utility model relates to the technical field of power battery systems of electric vehicles, and discloses a PTC (Positive Temperature Coefficient) heating device for heating a battery module, which comprises a battery module mounted and fixed in a battery shell, and the battery module is erected and mounted on the inner bottom wall of the battery shell; and the PTC heating module is fixed on the bottom surface of the battery module in a jacking manner through a jacking structure arranged on the bottom wall of the battery shell. Compared with the prior art, the PTC heating module has the advantages that when the PTC heating module is used, the battery module is erected and mounted at the inner bottom of the battery shell, and the PTC heating module is propped against and fixed at the bottom of the battery module by matching with the propping effect of the propping structure, so that the requirement on the load-bearing stress of the PTC heating module is effectively reduced; and the PTC heating module has a better heating effect.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle power battery system technology, specifically to a PTC heating device for heating battery modules. Background Technology

[0002] To ensure the performance of power batteries in low-temperature environments, they generally need to be heated. Currently, heating devices for electric vehicle power batteries typically come in two forms: PTC heaters and heating films.

[0003] There are two main types of PTC heaters: one is built into the battery module, installed between the cells for heating; this structure is more complex and costly. The other is placed outside the battery module, installed at the bottom or side for heating. The traditional installation method for this type of PTC heater is as follows: the battery module, PTC heater, and module mounting beam are all secured with bolts. It's clear that while this installation method allows for a large contact area between the battery module and the PTC heater, resulting in better heating, it places higher demands on the load-bearing capacity and structural strength of the PTC heater, and imposes strict requirements on the Z-axis height inside the battery. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide a PTC heating device for heating battery modules, which can ensure good heating effect while reducing the load-bearing requirements of PTC heating modules.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A PTC heating device for heating battery modules includes a battery module installed and fixed inside a battery housing, the battery module being mounted on the inner bottom wall of the battery housing;

[0007] It also includes a PTC heating module, which is fixed to the bottom surface of the battery module by a clamping structure set on the bottom wall of the battery housing. The clamping structure includes a nut sleeve, a bolt post, and a compression plate. A screw hole is reserved on the bottom wall of the battery housing. After the bolt post is threaded into the screw hole, it is also threaded onto the nut sleeve fixed on the inner wall of the battery housing. The abutting end of the bolt post is fixed with a compression plate. A silicone pad is provided on the side of the compression plate that presses against the PTC heating module. The silicone pad can effectively prevent the compression plate from squeezing and abrading the bottom of the battery module. The clamping structure has a pair of mirror images on the left and right sides.

[0008] As an improvement, ear plates are fixed at each corner of the bottom of the battery module. A semi-threaded post fixed to the bottom wall of the battery housing passes through the inner side of the ear plate, and a washer integrally formed on the semi-threaded post is attached to the lower side of the ear plate. A nut threaded onto the semi-threaded post is provided on the upper side, and the ear plate is sandwiched between the nut and the washer.

[0009] As an improvement, the PTC heating module includes a base layer, a conductive heating layer, and an infrared heating layer; after the conductive heating layer and the infrared heating layer are stacked and fixed together, a base layer is also stacked and fixed on opposite sides of each. This results in better heating performance.

[0010] The advantages of this utility model compared with the prior art are as follows:

[0011] In use, the battery module is mounted on the inner bottom of the battery casing, and with the tightening action of the clamping structure, the PTC heating module is firmly fixed to the bottom of the battery module. This effectively reduces the load-bearing requirements of the PTC heating module; and the PTC heating module has a better heating effect. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the present invention (where only the bottom wall of the battery casing is shown).

[0013] Figure 2 This is a structural schematic diagram from another perspective of this utility model.

[0014] Figure 3 This is a partial structural schematic diagram of the present invention. Figure 1 .

[0015] Figure 4 This is a partial structural schematic diagram of the present invention. Figure 2 .

[0016] As shown in the figure: 1. Battery casing; 2. Battery module; 3. Ear plate; 4. Semi-threaded post; 5. Gasket; 6. Nut; 7. Base layer; 8. Conductive heating layer; 9. Infrared heating layer; 10. Nut sleeve; 11. Bolt post; 12. Extrusion plate; 13. Silicone pad. Detailed Implementation

[0017] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] A PTC heating device for heating battery modules, comprising:

[0020] The battery module 2 is installed and fixed inside the battery housing 1. Specifically: ear plates 3 are fixed at each corner of the bottom of the battery module 2. A semi-threaded post 4 fixed to the bottom wall of the battery housing 1 passes through the inner side of the ear plate 3. A washer 5 integrally formed on the semi-threaded post 4 is attached to the lower side of the ear plate 3. A nut 6 threadedly connected to the semi-threaded post 4 is provided on the upper side.

[0021] The PTC heating module includes a base layer 7, a conductive heating layer 8, and an infrared heating layer 9. After the conductive heating layer 8 and the infrared heating layer 9 are stacked and fixed together, the base layer 7 is also stacked and fixed on opposite sides of the two. The conductive heating layer 8 is a PTC heating core structure with an insulating layer wrapped around its outer side.

[0022] The clamping structure includes a nut sleeve 10, a bolt post 11, and a pressing plate 12. A screw hole is reserved on the bottom wall of the battery housing 1. After the bolt post 11 is threaded into the screw hole, the nut sleeve 10, which is fixed on the inner wall of the battery housing 1, is also threaded onto it. The pressing end of the bolt post 11 is fixed with a pressing plate 12. A silicone pad 13 is provided on one side of the pressing plate 12 that presses against the PTC heating module.

[0023] In the specific implementation of this embodiment:

[0024] After the battery module 2 is installed inside the bottom of the battery housing 1, the PTC heating module can be pressed and fixed to the bottom surface of the battery module 2 by tightening the bolt post 11 with a screwdriver.

[0025] In a preferred embodiment, the clamping structure is provided in a pair of mirror images on the left and right sides.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A PTC heating device for heating battery modules, comprising a battery module (2) installed and fixed inside a battery casing (1), characterized in that: The battery module (2) is mounted on the inner bottom wall of the battery casing (1); It also includes a PTC heating module, which is fixed to the bottom surface of the battery module (2) by a clamping structure set on the bottom wall of the battery housing (1). The clamping structure includes a nut sleeve (10), a bolt post (11) and a pressing plate (12). The bottom wall of the battery housing (1) has a pre-drilled screw hole. After the bolt post (11) is threaded into the screw hole, it is also threaded with a nut sleeve (10) fixed on the inner wall of the battery housing (1). The pressing end of the bolt post (11) is fixed with a pressing plate (12). A silicone pad (13) is provided on one side of the pressing plate (12) that presses the PTC heating module. The clamping structure is provided in a pair on the left and right sides.

2. The PTC heating device for heating battery modules according to claim 1, characterized in that: The battery module (2) has ear plates (3) fixed at each corner of the bottom. A semi-threaded post (4) fixed on the bottom wall of the battery housing (1) passes through the inner side of the ear plate (3). A gasket (5) integrally formed on the semi-threaded post (4) is attached to the lower side of the ear plate (3). A nut (6) threaded onto the semi-threaded post (4) is provided on the upper side.

3. The PTC heating device for heating battery modules according to claim 2, characterized in that: The PTC heating module includes a base layer (7), a conductive heating layer (8), and an infrared heating layer (9); after the conductive heating layer (8) and the infrared heating layer (9) are stacked and fixed together, the base layer (7) is also stacked and fixed on the opposite sides of the two.

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