Battery module with PTC (Positive Temperature Coefficient) heating function

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery module with a PTC (Positive Temperature Coefficient) heating function, which comprises a shell, a PTC heating module and a battery pack body, an upper cover and a base are respectively inserted and buckled at the top and the bottom of the shell, a placement frame is arranged in the middle of the interior of the shell, and heat insulation cotton is filled in the placement frame. The PTC heating module is located in the middle of the placement frame, heat conduction plates are connected to the two sides of the PTC heating module through separation frames, and the battery pack bodies are located on the two sides of the heat conduction plates; the two sides of the interior of the shell at the heat conducting plate on one side abut against the edge of the battery pack body through limiting supports, the bottoms of the limiting supports are connected through a supporting plate, and heat insulation plates are arranged at the tops of the battery pack body and the PTC heating module; the bottom of the upper cover is connected with the PTC heating module in an inserted mode through a connecting socket, and the top of the upper cover is provided with a display screen, a plurality of control buttons and a connecting plug.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a battery module with a self - contained PTC heating function. Background Art

[0002] In recent years, large - capacity battery packs have been increasingly widely used in society. A large - capacity battery pack (referred to as a battery module) is composed of multiple single - cell batteries and is generally used as a driving motor and locomotive starting power source, such as the power source of an electric vehicle.

[0003] Most of the existing battery modules have installation and heat - insulation structures during use. However, in regions with relatively cold weather such as the north, since the temperature of the battery module is relatively low at low temperatures, the activity of lithium ions inside is relatively low, and charging will cause the occurrence of lithium deposition on the negative electrode, leading to a rapid decline in battery capacity. In extreme cases, it may even cause short - circuit between the positive and negative electrodes. Therefore, the battery module can generally only be charged between zero degrees and forty - five degrees during charging. Therefore, heating of the battery is required for use. Thus, the utility model proposes a battery module with a self - contained PTC heating function to solve this problem. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that when the battery module is charged and used under a relatively low external environmental temperature, it will cause a rapid decline in the capacity of the battery module and even cause a short - circuit situation, and it needs to work properly at a certain temperature.

[0005] To solve the above - mentioned technical problem, the technical solution provided by the utility model is: a battery module with a self - contained PTC heating function, which includes a housing, a PTC heating module, and a battery pack body. The top and bottom of the housing are respectively plugged and fastened with an upper cover and a base. A placement rack is arranged in the middle of the housing, and the interior of the placement rack is filled with heat - insulating cotton. The PTC heating module is located in the middle of the placement rack, and heat - conducting plates are connected to both sides of the PTC heating module through partition racks. The battery pack body is located on both sides of the heat - conducting plates; on both sides of the housing interior at one side of the heat - conducting plate, the edges of the battery pack body are abutted against by limit brackets, the bottoms of the limit brackets are connected through support plates, and heat - insulating plates are arranged on the tops of the battery pack body and the PTC heating module; the bottom of the upper cover is plugged into the PTC heating module through a connection socket, and a display screen, a plurality of control buttons, and a connection plug are arranged on the top of the upper cover.

[0006] Through the above technical solution, it is convenient for the installation and removal of the battery pack housing and the internal battery pack body. At the same time, the PTC heating module radiatively heats the heat conduction plates on both sides, and the heat conduction plates conductively heat the battery module on one side. The PTC heating module is controlled by a plurality of control buttons provided on the upper cover, and the set content is displayed on the display screen.

[0007] Preferably, a control circuit board is arranged inside the upper cover, and the control circuit board is electrically connected to the battery pack body, the connection socket, the display screen, a plurality of control buttons and the connection plug.

[0008] Through the above technical solution, the PTC heating module and the battery pack body are controlled by the control circuit board.

[0009] Preferably, both the placement rack and the partition rack are of a U-shaped structure as a whole, wherein the placement rack matches the shape of the middle part inside the housing, and the partition rack matches the shape of the inner side of the placement rack.

[0010] Through the above technical solution, the inside of the housing is partitioned by the placement rack, so that the PTC heating module can have the same heating effect on the battery pack bodies on both sides, and the distance between the PTC heating module and the heat conduction plate is increased by the partition rack. Through the partition setting, the heat received by the heat conduction plate can be effectively reduced, preventing the heat conduction plate from overheating and damaging the battery pack body on one side.

[0011] Preferably, the heat insulation cotton is fiberglass heat insulation cotton.

[0012] Through the above technical solution, the heat insulation cotton made of fiberglass heat insulation cotton can reduce the heat transferred from the PTC heating module to the housing, preventing problems such as deformation of the housing.

[0013] Preferably, the heat conduction plate is an aluminum heat conduction plate, and the heat conduction plate matches the shape of the inner side of the placement rack. A heat conduction layer is coated on the side of the heat conduction plate close to the PTC heating module, and an insulating layer is coated on the side of the heat conduction plate close to the battery pack body.

[0014] Through the above technical solution, the heat conduction layer can increase the absorption of heat from the PTC heating module, and the insulating layer can prevent static electricity from generating between the battery pack bodies.

[0015] Preferably, the limiting bracket is of an L-shaped structure as a whole, and the height of the limiting bracket is the same as the height of the placement rack. A "convex"-shaped placement cavity is formed between the two limiting brackets and the heat conduction plate. The battery pack body is located in the placement cavity, and the cavity at the top of the "convex" shape is for wiring.

[0016] Preferably, the support plate is on the same plane as the upper end surface below the placement rack, and the support plate and the limit card rack are of an integral structure.

[0017] Through the above technical solution, the limiting bracket separates the housing and the battery pack, reducing problems such as deformation of the housing caused by heat transfer to the housing, and wiring the battery pack body at the placement cavity.

[0018] Preferably, a positioning ring matching the internal shape of the housing is provided on the inner side of the upper cover. The inner side of the positioning ring abuts against the edge of the heat insulation plate, and a support ring is provided above the heat insulation plate where the upper cover is located.

[0019] Through the above technical solution, the upper cover squeezes and fixes the battery pack body to prevent the battery pack body from moving during vibration.

[0020] The advantages of the present utility model compared with the prior art are as follows:

[0021] This battery module is provided with a PTC heating module to heat the battery module, and heats the bottom of the battery module by means of radiation heating, avoiding other situations such as short circuit caused by heating the electrodes of the battery module, and is provided with a control circuit board and a plurality of control buttons outside the battery module that can control the PTC heating module to adjust the temperature of the heating function, so as to adapt to the use of the battery module in a low-temperature environment. Description of the Drawings

[0022] Figure 1 It is a structural diagram of a battery module with a self - contained PTC heating function of the present utility model.

[0023] Figure 2 It is a sectional three - dimensional structural diagram of a battery module with a self - contained PTC heating function of the present utility model.

[0024] Figure 3 It is an internal structural diagram of a battery module with a self - contained PTC heating function of the present utility model.

[0025] Figure 4 It is an exploded structural diagram of the placement rack of a battery module with a self - contained PTC heating function of the present utility model.

[0026] Figure 5 It is a structural diagram of the limiting bracket of a battery module with a self - contained PTC heating function of the present utility model.

[0027] Figure 6 It is a sectional structural diagram of the heat - conducting plate material of a battery module with a self - contained PTC heating function of the present utility model.

[0028] As shown in the figure: 1. Housing; 2. PTC heating module; 3. Battery pack body; 4. Upper cover; 5. Base; 6. Placing rack; 7. Heat insulation cotton; 8. Partition rack; 9. Heat conduction plate; 10. Limit bracket; 11. Support plate; 12. Heat insulation plate; 13. Connection socket; 14. Display screen; 15. Multiple control buttons; 16. Connection plug; 17. Control circuit board; 18. Heat conduction layer; 19. Insulation layer; 20. Positioning ring; 21. Support ring Detailed implementation manner

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, terms such as "installation", "provided with", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] Embodiment 1:

[0032] As shown in the attached drawings of the specification Figures 1-6 A battery module with a self - contained PTC heating function includes a housing 1, a PTC heating module 2, and a battery pack body 3. An upper cover 4 and a base 5 are respectively plugged and fastened to the top and bottom of the housing 1. A placing rack 6 is arranged in the middle of the interior of the housing 1, and heat insulation cotton 7 is filled in the interior of the placing rack 6. The heat insulation cotton 7 is fiberglass thermal insulation cotton. The PTC heating module 2 is located in the middle of the placing rack 6, and heat conduction plates 9 are connected to both sides of the PTC heating module 2 through a partition rack 8. The heat conduction plates 9 are aluminum heat conduction plates 9, and the heat conduction plates 9 match the shape of the inner side of the placing rack 6. A heat conduction layer 18 is coated on the side of the heat conduction plate 9 close to the PTC heating module 2, and an insulation layer 19 is coated on the side of the heat conduction plate 9 close to the battery pack body 3. The placing rack 6 and the partition rack 8 as a whole are both U - shaped structures, where the placing rack 6 matches the shape of the middle of the interior of the housing 1, and the partition rack 8 matches the shape of the inner side of the placing rack 6. The battery pack body 3 is located on both sides of the heat conduction plate 9.

[0033] In the present utility model, both sides inside the housing 1 at the heat conduction plate 9 on one side are abutted against the edges of the battery pack body 3 through the limiting brackets 10. The bottom of the limiting brackets 10 is connected through the support plate 11. The limiting brackets 10 are of an overall L-shaped structure, and the height of the limiting brackets 10 is the same as the height of the placement rack 6. A placement cavity in a "convex" shape is formed between the two limiting brackets 10 and the heat conduction plate 9. The battery pack body 3 is located in the placement cavity, and the cavity at the top of the "convex" shape is a cavity for wiring. A heat insulation plate 12 is provided on the top of the battery pack body 3 and the PTC heating module 2.

[0034] In the present utility model, the bottom of the upper cover 4 is plugged into the PTC heating module 2 through the connection socket 13. A display screen 14, a plurality of control buttons 15 and a connection plug 16 are provided on the top of the upper cover 4. A control circuit board 17 is provided inside the upper cover 4. The control circuit board 17 is electrically connected to the battery pack body 3, the connection socket 13, the display screen 14, the plurality of control buttons 15 and the connection plug 16. A positioning ring 20 matching the internal shape of the housing 1 is provided on the inner side of the upper cover 4. The inner side of the positioning ring 20 is abutted against the edge of the heat insulation plate 12, and a support ring 21 is provided above the heat insulation plate 12 where the upper cover 4 is located.

[0035] When the present utility model is specifically implemented, the connection plug 16 is connected to an external electrical device and a charging device, and then the PTC heating module 2 is used by means of direct power supply. The temperature to be heated by the PTC heating module 2 and the like is adjusted through the plurality of control buttons 15 and is displayed at the display screen 14. Then, the PTC heating module 2 radiatively heats the two heat conduction plates 9 on both sides, and the heat conduction plates 9 conduct heat to heat the battery pack body 3 abutted on one side, so as to adjust the temperature of the battery pack body 3 and achieve the purpose of heating it.

[0036] The above describes the present utility model and its implementation manners. Such description is not restrictive. What is shown in the specific implementation manners is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design a structural manner and an embodiment similar to the technical solution without creative work without departing from the creative purpose of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A battery module with a PTC heating function, comprising a housing, a PTC heating module and a battery pack body, wherein the top and bottom of the housing are respectively plugged and buckled with an upper cover and a base, characterized in that: A placement rack is provided in the middle of the shell, and the inside of the placement rack is filled with heat insulation cotton, the PTC heating module is located in the middle of the placement rack, and heat conduction plates are connected to both sides of the PTC heating module through a partition rack, and the battery pack body is located on both sides of the heat conduction plate; The two sides of the shell inside the heat conducting plate on one side are butted against the edge of the battery pack body through a limiting bracket, the bottom of the limiting bracket is connected through a supporting plate, and a heat insulation plate is provided on the top of the battery pack body and the PTC heating module; The bottom of the upper cover is plugged into the PTC heating module through a connecting socket, and the top of the upper cover is provided with a display screen, a plurality of control buttons and a connecting plug.

2. A battery module with a PTC heating function according to claim 1, characterized in that: A control circuit board is arranged inside the upper cover, and the control circuit board is electrically connected to the battery pack body, the connection socket, the display screen, a plurality of control buttons and the connection plug.

3. The battery module with a PTC heating function according to claim 1, characterized in that: The placing rack and the dividing rack are both U-shaped structures as a whole, wherein the placing rack matches the shape of the middle of the shell, and the dividing rack matches the shape of the inner side of the placing rack.

4. The battery module with a PTC heating function according to claim 1, characterized in that: The thermal insulation cotton is glass fiber thermal insulation cotton.

5. The battery module with a PTC heating function according to claim 1, characterized in that: The heat conducting plate is an aluminum heat conducting plate, and the shape of the heat conducting plate matches the inner side of the placement rack. The side of the heat conducting plate close to the PTC heating module is coated with a heat conducting layer, and the side of the heat conducting plate close to the battery pack body is coated with an insulating layer.

6. The battery module with a PTC heating function according to claim 1, characterized in that: The limiting bracket is an L-shaped structure as a whole, and the height of the limiting bracket is the same as the height of the placement rack. A "convex"-shaped placement cavity is formed between the limiting bracket and the heat conducting plate on both sides. The battery pack body is located in the placement cavity, and the top of the "convex" shape is a cavity for wiring.

7. The battery module with a PTC heating function according to claim 1, characterized in that: The support plate and the upper end surface below the placement rack are in the same plane, and the support plate and the limiting bracket are an integrated structure.

8. The battery module with a PTC heating function according to claim 1, characterized in that: A positioning ring matching the inner shape of the shell is arranged on the inner side of the upper cover, the inner side of the positioning ring abuts against the edge of the heat insulation board, and a supporting ring is arranged on the upper cover above the heat insulation board.

Images