Battery module heat dissipation structure and lithium battery module

Abstract

The utility model discloses a battery module heat dissipation structure and lithium battery module, concretely relates to the battery module field, including base, the base top detachably connected with the frame board, the frame board top detachably connected with the apron, the apron bottom fixedly embedded with the heat conduction pad, the frame board inside is equipped with the first radiating plate, the first radiating plate both sides are equipped with two symmetrical distribution's second radiating plate, the first radiating plate, second radiating plate, apron and heat conduction pad top all are set up with a plurality of equidistance distribution's radiating hole. The utility model discloses through the first radiating plate and second radiating plate separate space respectively place battery module, cooperate the air pump and supply gas to the gas delivery groove through the four -way pipe, and the gas flows from a plurality of radiating holes from below to the top and takes away the heat, realizes battery module high -efficient heat dissipation, avoids liquid leakage damage risk, and the heat conduction pad on the apron can also directly contact with the top of battery module, and further strengthens the overall heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, and more specifically to a battery module heat dissipation structure and a lithium battery module. Background Technology

[0002] Lithium batteries are a type of rechargeable battery. They are widely used due to their high safety and long battery life. During the charging and discharging process, chemical reactions occur, causing the temperature inside the lithium battery pack to rise. When the temperature exceeds the maximum normal operating temperature of the lithium battery, its performance will decrease, and in severe cases, it may explode. Therefore, a heat dissipation structure is usually provided to cool the lithium battery module.

[0003] For example, the existing lithium battery module heat dissipation structure and lithium battery module with publication number CN207474625U utilize a heat dissipation unit to house the battery cells and arranges sensors near the heat dissipation unit to detect temperature changes. This allows for targeted heat dissipation of the heat dissipation unit when the temperature exceeds a threshold, resulting in more precise heat dissipation control, improved heat dissipation efficiency, and prevention of thermal runaway in the battery module. By using the aforementioned lithium battery module heat dissipation structure, the lithium battery module exhibits excellent overall heat dissipation performance and more stable operation.

[0004] However, the existing technologies described above still have the following problems in use: traditional battery module heat dissipation structures typically employ air cooling or liquid cooling. Based on this, the present invention provides a battery module heat dissipation structure and a lithium battery module with high heat dissipation efficiency. Utility Model Content

[0005] To overcome the aforementioned deficiencies in the prior art, this utility model provides a battery module heat dissipation structure and a lithium battery module. The battery module is placed in a space separated by a first heat dissipation plate and a second heat dissipation plate. An air pump supplies air to the air delivery channel through a four-way pipe. The gas flows out from the bottom to the top through multiple heat dissipation holes, carrying away heat and achieving efficient heat dissipation of the battery module. This avoids the risk of liquid leakage damage. The thermal pad on the cover plate can also directly contact the top of the battery module, further enhancing the overall heat dissipation effect, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a battery module heat dissipation structure, including a base, a frame plate detachably connected to the top of the base, a cover plate detachably connected to the top of the frame plate, a thermal pad fixedly embedded at the bottom of the cover plate, a first heat dissipation plate inside the frame plate, two symmetrically distributed second heat dissipation plates on both the front and rear sides of the first heat dissipation plate, multiple equally spaced heat dissipation holes on the top of the first heat dissipation plate, the second heat dissipation plate, the cover plate, and the thermal pad, and the heat dissipation holes on the first heat dissipation plate, the second heat dissipation plate, the cover plate, and the thermal pad are connected, and an air delivery groove is provided on the top of the base, the air delivery groove being connected to the multiple heat dissipation holes.

[0007] In a preferred embodiment, a first slot is provided on both sides of the frame plate, and the first heat sink is inserted between the two first slots. The design of the first slots facilitates the quick installation and removal of the first heat sink by the staff.

[0008] In a preferred embodiment, two symmetrically distributed second slots are provided on the front and rear sides of the first heat sink and on the inner walls of the front and rear sides of the frame plate. The second slots on the first heat sink correspond one-to-one with the second slots on the inner walls of the frame plate. The second heat sink is inserted between the two second slots. The design of the second slots facilitates the quick installation of the second heat sink.

[0009] In a preferred embodiment, the bottom of the base and the inner wall of the frame plate are provided with multiple evenly distributed mounting slots. Each mounting slot is fixed with a thin film, and a fire extinguishing agent is stored between the thin film and the mounting slot. The thermal pad is located on the outside of the multiple thin films. When the battery module catches fire accidentally, the thin film in the mounting slot is burned, and the fire extinguishing agent inside flows out, which can effectively reduce the fire and thus play a role in extinguishing the fire to a certain extent.

[0010] In a preferred embodiment, a four-way pipe is fixedly inserted through the rear end of the base, the four-way pipe is connected to the inside of the air delivery channel, and an air pump is fixedly provided at the rear end of the base, the air inlet of the air pump is connected to the four-way pipe.

[0011] In a preferred embodiment, each heat dissipation hole on the cover plate is fixedly provided with a filter screen. The filter screen 15 can block dust and impurities in the external environment and prevent dust and impurities from clogging the heat dissipation hole 7.

[0012] A lithium battery module includes a lithium battery module housing, and the lithium battery module housing is provided with the above-mentioned heat dissipation structure.

[0013] The technical effects and advantages of this utility model are as follows: 1. This utility model uses a first heat dissipation plate and a second heat dissipation plate to separate spaces for placing battery modules. With the help of an air pump, air is supplied to the air delivery channel through a four-way pipe. The gas flows out from the bottom to the top through multiple heat dissipation holes, carrying away heat and achieving efficient heat dissipation of the battery modules. It avoids the risk of liquid leakage damage. The thermal pad on the cover plate can also directly contact the top of the battery module, further enhancing the overall heat dissipation effect.

[0014] 2. By storing fire extinguishing agent inside the mounting slot, when the battery module catches fire accidentally, the film inside the mounting slot is burned, and the fire extinguishing agent inside flows out, which can effectively reduce the fire and thus play a role in extinguishing the fire to a certain extent. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a sectional view of the base and frame plate of this utility model; Figure 3 This is a schematic diagram showing the separation of the thermal pad and the cover plate of this utility model; Figure 4 This is a sectional view of the cover plate of this utility model; Figure 5 This is a top view of the overall structure of this utility model; Figure 6 This is a schematic diagram of the lithium battery module housing.

[0016] The attached diagram is labeled as follows: 1. Base; 2. Frame plate; 3. Cover plate; 4. Thermal pad; 5. First heat sink; 6. Second heat sink; 7. Heat dissipation hole; 8. Air delivery channel; 9. First slot; 10. Second slot; 11. Mounting slot; 12. Membrane; 13. Four-way pipe; 14. Air pump; 15. Filter screen; 16. Lithium battery module housing. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Refer to the instruction manual appendix Figures 1-6 This utility model provides a heat dissipation structure for a battery module, including a base 1. A frame plate 2 is detachably connected to the top of the base 1, and a cover plate 3 is detachably connected to the top of the frame plate 2. A thermal pad 4 is fixedly embedded at the bottom of the cover plate 3. A first heat dissipation plate 5 is provided inside the frame plate 2. Two symmetrically distributed second heat dissipation plates 6 are provided on both the front and rear sides of the first heat dissipation plate 5. Multiple heat dissipation holes 7 are provided at equal intervals on the top of the first heat dissipation plate 5, the second heat dissipation plate 6, the cover plate 3, and the thermal pad 4. The heat dissipation holes 7 on the first heat dissipation plate 5, the second heat dissipation plate 6, the cover plate 3, and the thermal pad 4 are connected. An air supply groove 8 is provided on the top of the base 1, and the air supply groove 8 is connected to the multiple heat dissipation holes 7.

[0019] The base 1, frame plate 2, cover plate 3, first heat sink 5, and second heat sink 6 can all be made of metal thermally conductive materials. The thermal pad 4 is made of thermally conductive PCM, which is thermally conductive phase change material. It is made by composite thermally conductive fillers on the basis of ordinary phase change material (PCM). By adding thermally conductive fillers such as graphene, metal powder, and ceramic particles, it solves the problem of low thermal conductivity of ordinary PCM and can quickly transfer heat, thus effectively improving the heat dissipation effect of the battery module.

[0020] The frame plate 2 has first slots 9 on both sides. The first heat sink 5 is inserted between the two first slots 9. The front and rear sides of the first heat sink 5 and the inner walls of the front and rear sides of the frame plate 2 have two symmetrically distributed second slots 10. The second slots 10 on the first heat sink 5 correspond one-to-one with the second slots 10 on the inner wall of the frame plate 2. The second heat sink 6 is inserted between the two second slots 10.

[0021] A four-way pipe 13 is fixedly inserted through the rear end of the base 1. The four-way pipe 13 is connected to the inside of the air supply channel 8. An air pump 14 is fixedly installed at the rear end of the base 1. The air inlet of the air pump 14 is connected to the four-way pipe 13.

[0022] In actual operation, the staff first installs the frame plate 2 on the top of the base 1, then inserts the first heat sink 5 between two corresponding first slots 9, and then inserts multiple second heat sinks 6 between two corresponding second slots 10. The first heat sink 5 and multiple second heat sinks 6 divide the interior of the frame plate 2 into multiple independent spaces, which facilitates the placement of battery modules. The outer wall of the battery module is in close contact with the first heat sink 5 and the second heat sink 6, so that the heat generated is quickly transferred to the heat sink. Then, the air pump 14 is started to deliver gas into the air delivery channel 8 through the four-way pipe 13. The gas flows upward from the bottom of multiple heat dissipation holes 7, flows over the surface of the first heat sink 5 and the second heat sink 6 and carries away the heat on them, so as to achieve effective heat dissipation of the battery module. Based on the principle of hot air rising, the heat dissipation process is more efficient. At the same time, the thermal pad 4 at the bottom of the cover plate 3 is in direct contact with the top of the battery module, which further enhances the overall heat dissipation effect.

[0023] like Figure 4 As shown, the bottom of the base 1 and the inner wall of the frame plate 2 are provided with multiple evenly distributed mounting grooves 11. Each mounting groove 11 is fixed with a film 12 inside, and fire extinguishing agent is stored between the film 12 and the mounting groove 11. The heat-conducting pad 4 is located on the outside of the multiple films 12.

[0024] By storing fire extinguishing agent inside the mounting slot 11, when the battery module catches fire accidentally, the film 12 inside the mounting slot 11 is burned, and the fire extinguishing agent inside flows out, which can effectively reduce the fire and thus play a role in extinguishing the fire to a certain extent.

[0025] like Figure 1 and Figure 4 As shown, each heat dissipation hole 7 on the cover plate 3 is equipped with a filter screen 15. The filter screen 15 can block dust and impurities from the external environment, preventing dust and impurities from clogging the heat dissipation hole 7.

[0026] Refer to the instruction manual appendix Figure 6This utility model provides a lithium battery module, including a lithium battery module housing 16, wherein the lithium battery module housing 16 is provided with a battery module heat dissipation structure as described above.

[0027] By directly installing the base 1, frame plate 2, and cover plate 3 inside the lithium battery module housing 16, the heat dissipation of the lithium battery module body can be effectively improved.

[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery module heat dissipation structure, including a base (1), characterized in that: The base (1) is detachably connected to a frame plate (2) at the top, and the frame plate (2) is detachably connected to a cover plate (3) at the top. A heat-conducting pad (4) is fixedly embedded at the bottom of the cover plate (3). The frame plate (2) is provided with a first heat dissipation plate (5) inside. The first heat dissipation plate (5) is provided with two symmetrically distributed second heat dissipation plates (6) on both the front and rear sides. The top of the first heat dissipation plate (5), the second heat dissipation plate (6), the cover plate (3) and the heat conduction pad (4) are provided with multiple equally spaced heat dissipation holes (7), and the heat dissipation holes (7) on the first heat dissipation plate (5), the second heat dissipation plate (6), the cover plate (3) and the heat conduction pad (4) are connected. The base (1) has an air supply groove (8) on its top, and the air supply groove (8) is connected to a plurality of heat dissipation holes (7).

2. The battery module heat dissipation structure according to claim 1, characterized in that: The frame plate (2) has a first slot (9) on both sides, and the first heat sink (5) is inserted between the two first slots (9).

3. The battery module heat dissipation structure according to claim 1, characterized in that: Two symmetrically distributed second slots (10) are provided on the front and rear sides of the first heat sink (5) and the inner walls of the front and rear sides of the frame plate (2). The second slots (10) on the first heat sink (5) correspond one-to-one with the second slots (10) on the inner wall of the frame plate (2). The second heat sink (6) is inserted between the two second slots (10).

4. The battery module heat dissipation structure according to claim 1, characterized in that: The bottom of the base (1) and the inner wall of the frame plate (2) are provided with multiple evenly distributed mounting grooves (11). Each mounting groove (11) is fixed with a film (12), and a fire extinguishing agent is stored between the film (12) and the mounting groove (11). The heat-conducting pad (4) is located on the outside of the multiple films (12).

5. The battery module heat dissipation structure according to claim 1, characterized in that: The base (1) has a four-way pipe (13) fixedly inserted through its rear end. The four-way pipe (13) is connected to the inside of the air delivery channel (8). The base (1) has an air pump (14) fixedly installed at its rear end. The air inlet of the air pump (14) is connected to the four-way pipe (13).

6. The battery module heat dissipation structure according to claim 1, characterized in that: Each heat dissipation hole (7) on the cover plate (3) is equipped with a filter screen (15).

7. A lithium battery module, characterized in that: It includes a lithium battery module housing (16), wherein the lithium battery module housing (16) is provided with a battery module heat dissipation structure as described in any one of claims 1-6.

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