Battery module local heat dissipation device

Abstract

The utility model discloses a kind of battery module local heat-dissipating device, including receiving frame, electric core body and cover, receiving frame bottom end evenly fixedly connected with containing frame, electric core body upper end is contacted with pressing strip, and pressing strip is fixedly connected in cover, cover both sides are equipped with first recess, cover is fixedly connected with support in first recess, support is rotatably connected with air guide fan, cover both sides are fixedly connected with guide cover, guide cover one side is inserted with limit plate, recess is equipped in limit plate one side and fixedly connected with filter screen in recess, the utility model is through setting containing frame receiving multiple electric core body in receiving frame bottom side, then heat conduction is carried out through heat-dissipating strip and heat-conducting sheet, then air current is driven into cover by air guide fan, and cooperate first adsorption block and second adsorption block to carry out moisture adsorption in air current, can dehumidify while carrying out heat dissipation to electric core body connecting point, reduce the damage of battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, and specifically to a local heat dissipation device for a battery module. Background Technology

[0002] A battery module is a unit assembled from multiple battery cells. It typically consists of battery cells, connectors, protection circuits, casing, battery management system, etc. Common types of battery cells include cylindrical cell modules, prismatic cell modules, and pouch cell modules. Battery modules generate heat during charging and discharging. When the local heat is too high, it may cause electrolyte decomposition, membrane melting, and damage to the positive and negative electrode material structure, leading to thermal runaway.

[0003] According to the Chinese patent publication number CN213905453U, "A battery module heat dissipation device", it mainly describes the connection between the connector, heat dissipation pipe and heat dissipation shell. The distance between the heat dissipation pipes can be adjusted by the size of the connector, and the heat dissipation effect can be adjusted according to the density of the heat dissipation pipes to achieve different heat dissipation effects.

[0004] Common battery modules require heat sinks or heat dissipation channels to be installed on the outer frame to promote airflow to the side of the battery cells, thereby reducing the temperature of the battery cells during charging and discharging. However, the battery cell connection points and BMS also generate heat during use. When heat accumulates, it can cause thermal runaway and damage the battery module. Utility Model Content

[0005] In view of the deficiencies in the prior art, this utility model provides a local heat dissipation device for battery modules to improve the safety of cell connections or BMS during use and reduce the probability of thermal runaway.

[0006] The technical solution adopted by this utility model to solve the technical problem is: a local heat dissipation device for a battery module, including a receiving frame, a cell body and a cover. The receiving frame is uniformly fixedly connected to the bottom end of the receiving frame. The upper end of the cell body is in contact with a pressure strip. The pressure strip is fixedly connected inside the cover. The cover has a first groove on both sides. The cover is fixedly connected to a bracket in the first groove. A guide fan is rotatably connected to the bracket. The cover has a guide cover fixedly connected to both sides. A limit plate is inserted into one side of the guide cover. A groove is opened on one side of the limit plate and a filter screen is fixedly connected in the groove. A positioning rod is threaded to the bottom end of the limit plate. A protrusion is fixedly connected to the bottom end of the positioning rod and the protrusion contacts one side of the guide cover. A first adsorption block is in contact with the upper end of the limit plate. A connecting rod is fixedly connected to one side of the first adsorption block and a second adsorption block is connected to one side of the connecting rod. The bottom ends of the first adsorption block and the second adsorption block are in contact with the limit plate. The first adsorption block and the second adsorption block are respectively located on both sides of the filter screen.

[0007] As a preferred technical solution of this utility model, a limiting rod is inserted into the bottom side of the first adsorption block and the second adsorption block. The limiting rod is located on the upper side of the limiting plate. By setting the limiting rod, temporary support can be provided on the bottom side of the first adsorption block and the second adsorption block, so that a flow channel is formed between the first adsorption block and the second adsorption block, and moisture is adsorbed.

[0008] As a preferred technical solution of this utility model, guide blocks are fixedly connected to the upper ends of the first adsorption block and the second adsorption block. The two guide blocks respectively contact the guide cover and the sealing cover. By setting the guide blocks, the bend angle can be reduced and the generation of turbulence can be reduced.

[0009] As a preferred technical solution of this utility model, a humidity sensor is fixedly connected inside the cover. The humidity sensor is model SHT45, which can monitor the environment inside the cover and remind staff to replace consumable parts.

[0010] As a preferred technical solution of this utility model, heat dissipation strips are uniformly fixedly connected to the two mutually distant sides of the receiving frame, and a heat-conducting sheet is fixedly connected to the bottom of the receiving frame. By setting heat dissipation strips and heat-conducting sheets, and by filling the space between the battery cell body and the receiving frame with thermally conductive silicone grease, the heat dissipation effect of the battery cell body is improved.

[0011] This utility model has the following advantages: by setting a receiving frame on the bottom side of the receiving frame to receive multiple battery cell bodies, and then conducting heat through heat dissipation strips and heat conduction sheets, and then driving airflow into the cover through a guide fan, and working with the first adsorption block and the second adsorption block to adsorb moisture in the airflow, it can dehumidify while dissipating heat at the connection point of the battery cell body, thereby reducing damage to the battery module. Attached Figure Description

[0012] Figure 1 This is a side cross-sectional view of a preferred embodiment of the present invention of a battery module local heat dissipation device;

[0013] Figure 2 This is a three-dimensional structural diagram of the limiting plate of a local heat dissipation device for a battery module according to a preferred embodiment of the present invention.

[0014] Figure 3 This is a three-dimensional structural diagram of the receiving frame of a local heat dissipation device for a battery module according to a preferred embodiment of the present invention.

[0015] Explanation of reference numerals in the attached drawings: 1. Receiving frame; 2. Receiving frame; 3. Battery cell body; 4. Cover; 5. First groove; 6. Bracket; 7. Fan; 8. Guide cover; 9. Limiting plate; 10. Positioning rod; 11. First adsorption block; 12. Second adsorption block; 13. Limiting rod; 14. Humidity sensor; 15. Heat sink; 16. Heat-conducting sheet; 17. Guide block; 18. Pressure strip. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Please refer to the following: Figure 1-3 The battery module partial heat dissipation device shown includes a receiving frame 1, a cell body 3, and a cover 4. A receiving frame 2 is uniformly fixedly connected to the bottom end of the receiving frame 1. A pressure strip 18 contacts the upper end of the cell body 3. The pressure strip 18, in conjunction with the receiving frame 2, can limit the movement of the cell body 3. The pressure strip 18 is fixedly connected inside the cover 4. First grooves 5 are formed on both sides of the cover 4. A bracket 6 is fixedly connected to the cover 4 within the first grooves 5. A guide fan 7 is rotatably connected to the bracket 6. Guide covers 8 are fixedly connected to both sides of the cover 4. The guide covers 8 provide shielding to reduce rainwater directly entering the interior of the cover 4. A limiting plate 9 is inserted into one side of the guide cover 8. A groove is formed on one side of the limiting plate 9, and a guide fan is fixedly connected within the groove. The filter screen provides dust filtration for airflow into the cover 4. The bottom end of the limiting plate 9 is threaded with a positioning rod 10. By removing the positioning rod 10, the limiting plate 9 can be removed and cleaned. The bottom end of the positioning rod 10 is fixedly connected to a protrusion that contacts one side of the guide cover 8. The upper end of the limiting plate 9 contacts a first adsorption block 11. A connecting rod is fixedly connected to one side of the first adsorption block 11, and a second adsorption block 12 is connected to one side of the connecting rod. The materials of the first adsorption block 11 and the second adsorption block 12 are activated carbon and alumina, etc., and can be replaced periodically. The bottom ends of the first adsorption block 11 and the second adsorption block 12 are both in contact with the limiting plate 9, and the first adsorption block 11 and the second adsorption block 12 are located on both sides of the filter screen.

[0018] Among them, the bottom sides of the first adsorption block 11 and the second adsorption block 12 are connected to a limiting rod 13. The limiting rod 13 is located on the upper side of the limiting plate 9. By setting the limiting rod 13, the stability of the first adsorption block 11 and the second adsorption block 12 can be guaranteed.

[0019] The first adsorption block 11 and the second adsorption block 12 are both fixedly connected to the upper end of the guide block 17. The two guide blocks 17 contact the guide cover 8 and the sealing cover 4 respectively. By setting the guide block 17, airflow guidance can be provided to reduce the generation of turbulence.

[0020] A humidity sensor 14, model SHT45, is fixedly connected inside the cover 4. By setting the humidity sensor 14 and its threshold, the humidity inside the cover 4 can be monitored, which can help remind staff to replace the first adsorption block 11 and the second adsorption block 12.

[0021] Among them, heat dissipation strips 15 are evenly fixedly connected to the two sides of the housing frame 2 that are far apart from each other, and a heat-conducting sheet 16 is fixedly connected to the bottom of the housing frame 2. The housing frame 2 is a thin metal sheet structure. At the same time, thermally conductive silicone grease can be filled between the housing frame 2 and the battery cell body 3. By setting the heat dissipation strips 15 and the heat-conducting sheet 16, it is easy to adsorb and dissipate heat from the battery cell body 3 that is undergoing chemical reaction.

[0022] Working principle: When the battery cell body 3 undergoes a chemical reaction, the guide fan 7 is activated to rotate, and the airflow is propelled into the cover 4 after being adsorbed by the first adsorption block 11 and the second adsorption block 12. Then, the humidity sensor 14 monitors the airflow. By monitoring, excessive moisture can be reduced from contacting the battery cell body 3, thereby providing local heat dissipation when the battery cell body 3 is charging and discharging. At the same time, a receiving frame 2 is set on the bottom side of the battery cell body 3. Through the setting of heat dissipation strips 15 and heat-conducting plates 16, heat dissipation can be achieved by contacting the airflow of the external environment, reducing the occurrence of thermal runaway in the battery cell body 3.

[0023] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0024] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A local heat dissipation device for a battery module, comprising a receiving frame (1), a cell body (3), and a cover (4), characterized in that, The receiving frame (1) is uniformly fixedly connected to the bottom end of the receiving frame (2). The upper end of the battery cell body (3) is in contact with the pressure strip (18). The pressure strip (18) is fixedly connected inside the cover (4). The cover (4) has a first groove (5) on both sides. The cover (4) is fixedly connected to the bracket (6) in the first groove (5). The bracket (6) is rotatably connected to the guide fan (7). The cover (4) has a guide cover (8) fixedly connected to both sides. The guide cover (8) has a limit plate (9) inserted into one side. The limit plate (9) has a groove on one side. A filter screen is fixedly connected inside. A positioning rod (10) is threadedly connected to the bottom end of the limiting plate (9). A protrusion is fixedly connected to the bottom end of the positioning rod (10) and the protrusion contacts one side of the guide cover (8). A first adsorption block (11) is contacted on one side of the upper end of the limiting plate (9). A connecting rod is fixedly connected to one side of the first adsorption block (11) and a second adsorption block (12) is connected to one side of the connecting rod. The bottom ends of the first adsorption block (11) and the second adsorption block (12) are both in contact with the limiting plate (9), and the first adsorption block (11) and the second adsorption block (12) are located on both sides of the filter screen.

2. The battery module local heat dissipation device as described in claim 1, characterized in that, A limiting rod (13) is inserted into the bottom side of the first adsorption block (11) and the second adsorption block (12), and the limiting rod (13) is located on the upper side of the limiting plate (9).

3. The battery module local heat dissipation device as described in claim 2, characterized in that, The first adsorption block (11) and the second adsorption block (12) are both fixedly connected to the upper end of the guide block (17), and the two guide blocks (17) respectively contact the guide cover (8) and the sealing cover (4) side.

4. A local heat dissipation device for a battery module as described in claim 3, characterized in that, A humidity sensor (14) is fixedly connected inside the cover (4), and the humidity sensor (14) is model SHT45.

5. A local heat dissipation device for a battery module as described in claim 4, characterized in that, Heat dissipation strips (15) are evenly fixedly connected to the two sides of the receiving frame (2) that are far apart from each other, and a heat-conducting sheet (16) is fixedly connected to the bottom end of the receiving frame (2).

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