A heat dissipation device for charging and discharging a battery pack
By using n-shaped separators, outer casing, cooling fans, and upper heat dissipation components in the battery pack, the problem of external air entering the battery box and affecting the circuit board is solved, achieving efficient heat dissipation and component protection, and preventing thermal runaway.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG SHENGBOLAI POWER ENG CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-21
AI Technical Summary
In the current battery pack process, outside air directly enters the battery box during heat dissipation, causing dust and moisture to come into contact with the circuit board, affecting the lifespan of components. At the same time, the heat dissipation efficiency is limited, and thermal runaway is prone to occur.
The internal compartments of the battery box are divided by an n-shaped partition. Combined with the outer casing, cooling fan and upper heat dissipation components, including a cover plate, rectangular docking channels and heat dissipation fins, the internal heat dissipation is efficient and external air is prevented from entering through a sealed structure.
It achieves efficient heat dissipation inside the battery box, prevents external air from contacting the battery and circuit board, protects circuit board components, improves service life, and prevents thermal runaway.
Smart Images
Figure CN224537120U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery pack heat dissipation technology, specifically a heat dissipation device for charging and discharging battery packs. Background Technology
[0002] Battery packs generate a lot of heat when they are working, which raises the internal temperature of the batteries. This is especially true for modules composed of multiple individual cells, where the temperature rises even faster, leading to an increase in operating temperature. If heat dissipation is not carried out in time, lithium battery packs are prone to thermal runaway, reducing their lifespan, and in severe cases, even causing lithium batteries to catch fire. Therefore, corresponding heat dissipation holes are opened on the battery box on the outside of the battery pack, and a cooling fan is installed to achieve heat dissipation of the battery pack. However, in this type of air-cooling operation, external air directly enters the battery box, which can easily carry dust and moisture that come into contact with the battery and the circuit board inside the battery box, affecting the lifespan of the circuit board components. Based on this, a heat dissipation device for charging and discharging battery packs is provided. Utility Model Content
[0003] The purpose of this invention is to provide a heat dissipation device for charging and discharging a battery pack in order to solve the problems mentioned above.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a heat dissipation device for charging and discharging a battery pack, comprising a battery box, wherein multiple n-shaped partitions are uniformly fixed along the long side of the inner side of the battery box, the multiple n-shaped partitions divide the interior of the battery box into multiple placement slots for independently placing batteries, and the bottom of the n-shaped partitions is an open structure. An outer box is fixed to the bottom of the top edge of the battery box. The outer box is wrapped around the outside of the battery box body. The bottom of the outer box is formed with an inverted concave groove. A cooling fan is installed on the inside of the inverted concave groove. The cooling fan blows the outside air upward to the inside of the n-shaped partition to cool the battery inside the battery box. The top of the battery box is also equipped with an upper heat dissipation component, which is used to seal the top of the battery box and dissipate heat from the space above the battery.
[0005] As a further improvement of this utility model: the upper heat dissipation component includes a cover plate and a rectangular docking channel; The rectangular docking channel is fixed to the bottom of the cover plate, and the top of the cover plate has a through hole that communicates with the inner cavity of the rectangular docking channel. The top of the n-shaped partition is provided with a docking slot. When the cover is closed on the top of the battery box, the rectangular docking channel is inserted into the docking slot to dock with the n-shaped partition. Air flowing upward along the inner cavity of the n-shaped partition can flow through the rectangular docking channel to the area above the cover plate, which is used to exchange heat with the air inside the battery box that is in contact with the rectangular docking channel and the cover plate.
[0006] As a further improvement of this utility model: the upper heat dissipation assembly also includes heat dissipation fins and a top plate; The heat dissipation fins are fixed to the top of the cover plate and extend through the cover plate to the bottom of the cover plate. The heat dissipation fins and the rectangular docking channels are distributed perpendicularly and alternately. The top plate is fixed to the top of the heat dissipation fins. The heat dissipation fins are used to increase the heat exchange area with the air inside the battery box, and at the same time guide the air flowing upward from the rectangular docking channel, so that the air can fully contact the upper surface of the cover plate.
[0007] As a further improvement of this utility model: the inner wall size of the outer box is larger than the outer wall size of the battery box, and ventilation openings that communicate with the inner cavity of the outer box are provided on both sides of the outer wall near the top.
[0008] As a further improvement of this utility model, sealing elements are provided at the positions where the rectangular docking channel contacts the docking slot and at the positions where the cover plate contacts the battery box.
[0009] As a further improvement of this utility model: the bottom horizontal height of the heat dissipation fins is higher than the bottom horizontal height of the rectangular docking channel, and when the rectangular docking channel and the docking slot are docked, the heat dissipation fins do not contact the n-shaped partition.
[0010] Compared with the prior art, the beneficial effects of this utility model are: By setting up an n-shaped partition, outer casing, upper heat dissipation components, and cooling fan, efficient heat dissipation can be achieved inside the battery box, while preventing external air from entering the battery box 1. That is, external air does not come into contact with the battery and the battery control circuit board, which can effectively avoid the impact of external air dust and moisture on the lifespan of circuit board components. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of this utility model; Figure 3 This is a split diagram of the upper heat dissipation component of this utility model; Figure 4This is a cross-sectional view of the upper heat dissipation component of this utility model in the docking state with the battery box. Figure 5 This is a cross-sectional exploded view of the present invention; Figure 6 This is a schematic diagram of the bottom structure of the upper heat dissipation component of this utility model.
[0012] In the diagram: 1. Battery box; 2. n-shaped partition; 3. Docking slot; 4. Outer casing; 5. Inverted concave groove; 6. Ventilation opening; 7. Cooling fan; 8. Upper heat dissipation component; 801. Cover plate; 802. Rectangular docking channel; 803. Heat dissipation fins; 804. Top plate. Detailed Implementation
[0013] 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.
[0014] Please see Figures 1-6 In this embodiment of the present invention, a heat dissipation device for charging and discharging a battery pack includes a battery box 1. Multiple n-shaped partitions 2 are uniformly fixed on the inner side of the battery box 1 along the long side direction. The multiple n-shaped partitions 2 divide the interior of the battery box 1 into multiple placement slots for independent placement of the batteries. The bottom of the n-shaped partitions 2 has an open structure. An outer box 4 is fixed to the bottom of the top edge of the battery box 1. The outer box 4 wraps around the outside of the battery box 1. The bottom of the outer box 4 is formed with an inverted concave groove 5. A cooling fan 7 is installed on the inside of the inverted concave groove 5. The cooling fan 7 blows the outside air upward to the inside of the n-shaped partition 2 to cool the battery inside the battery box 1. The top of the battery box 1 is also provided with an upper heat dissipation component 8, which is used to seal the top of the battery box 1 and dissipate heat from the space above the battery. The upper heat dissipation component 8 includes a cover plate 801 and a rectangular docking channel 802; The rectangular docking channel 802 is fixed to the bottom of the cover plate 801, and the top of the cover plate 801 is provided with a through hole that communicates with the inner cavity of the rectangular docking channel 802. The top of the n-shaped partition 2 is provided with a docking slot 3. When the cover plate 801 is closed on the top of the battery box 1, the rectangular docking channel 802 is inserted into the interior of the docking slot 3 to achieve docking with the n-shaped partition 2. Air flowing upward along the inner cavity of the n-shaped partition 2 can flow through the rectangular docking channel 802 to the area above the cover plate 801 for heat exchange with the air inside the battery box 1 that is in contact with the rectangular docking channel 802 and the cover plate 801. The upper heat dissipation component 8 also includes heat dissipation fins 803 and a top plate 804; The heat dissipation fins 803 are fixed to the top of the cover plate 801 and extend through the cover plate 801 to the bottom of the cover plate 801. The heat dissipation fins 803 and the rectangular docking channel 802 are distributed perpendicularly and alternately to each other. The top plate 804 is fixed to the top of the heat dissipation fins 803. The heat dissipation fins 803 are used to increase the heat exchange area with the air inside the battery box 1, and at the same time guide the air flowing upward from the rectangular docking channel 802 so that the air can fully contact the upper surface of the cover plate 801.
[0015] In this embodiment, the battery box 1 is used as follows: The batteries (i.e., square lithium batteries) are placed sequentially in multiple placement slots. After the battery control circuit is installed, the upper heat dissipation component 8 is assembled with the battery box 1. The rectangular docking channel 802 is aligned with the docking slot 3 and inserted. Finally, the cover plate 801 is attached to the upper surface of the battery box 1. Finally, the cover plate 801 is fixed to the battery box 1 with bolts. (It should be noted that the rectangular docking channel 802 does not contact the inner side of the battery box 1. Its space can be used for laying the battery control circuit. That is, the rectangular docking channel 802 will not interfere with the battery control circuit.) During later use, the cooling fan 7 operates to deliver external air from bottom to top. The upward-flowing air contacts the interior of the n-shaped partition 2, allowing the battery in contact with the outer wall of the n-shaped partition 2 to exchange heat with the flowing air. Simultaneously, some air flows upward along the rectangular docking channel 802 to the top of the cover plate 801, and then flows horizontally along the trajectory of the cooling fins 803. During this process, heat exchange occurs between the rectangular docking channel 802, the cooling fins 803, and the cover plate 801 on the air above the battery. (It should be noted that a temperature sensor is installed inside the battery box 1 to monitor the internal temperature of the battery box 1 and transmit the data to the control circuit board. The control circuit board controls the start and stop of the cooling fan 7 based on the collected temperature. This control structure is an existing battery cooling control structure, so it will not be described in detail. In addition, the battery box 1 has slots for the connecting wires between the control circuit board and the cooling fan 7 to pass through.) The combination of these components enables efficient heat dissipation of the battery, while preventing external air from entering the battery box 1. This means that external air does not come into contact with the battery or its control circuit board, effectively avoiding the impact of external dust and moisture on the lifespan of the circuit board components.
[0016] Please refer to this carefully. Figures 1-5 The inner wall of the outer box 4 is larger than the outer wall of the battery box 1. Ventilation openings 6 that communicate with the inner cavity of the outer box 4 are provided on both sides of the outer wall near the top.
[0017] In this embodiment: after heat exchange with the inner wall of the n-shaped partition 2, part of the air flows upward through the rectangular docking channel 802, while the other part of the air is discharged outward through the vent 6.
[0018] Please refer to this carefully. Figures 1-6 Sealing elements are provided at the positions where the rectangular docking channel 802 contacts the docking slot 3 and at the positions where the cover plate 801 contacts the battery box 1.
[0019] In this embodiment, this structure is used to ensure good sealing inside the battery box 1, preventing dust and moisture from the outside air from entering the battery box 1.
[0020] Please refer to this carefully. Figures 4-6 The bottom horizontal height of the heat dissipation fin 803 is higher than the bottom horizontal height of the rectangular docking channel 802, and when the rectangular docking channel 802 and the docking slot 3 are docked, the heat dissipation fin 803 does not contact the n-shaped partition 2.
[0021] In this embodiment, this structure ensures that the heat dissipation fins 803 do not interfere with the battery or the battery's control circuit.
[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A heat dissipation device for charging and discharging a battery pack, comprising a battery box (1), characterized in that, The battery box (1) has multiple n-shaped partitions (2) evenly fixed along the long side on the inner side. The multiple n-shaped partitions (2) divide the interior of the battery box (1) into multiple placement slots for independent placement of batteries. The bottom of the n-shaped partitions (2) has an open structure. The bottom of the top edge of the battery box (1) is fixed with an outer box (4), which is wrapped around the outside of the battery box (1). The bottom of the outer box (4) is formed with an inverted concave groove (5), and a cooling fan (7) is installed on the inside of the inverted concave groove (5). The cooling fan (7) blows the outside air upward to the inside of the n-shaped partition (2) to cool the battery inside the battery box (1). The top of the battery box (1) is also provided with an upper heat dissipation component (8), which is used to seal the top of the battery box (1) and dissipate heat from the space above the battery.
2. The heat dissipation device for charging and discharging a battery pack according to claim 1, characterized in that, The upper heat dissipation component (8) includes a cover plate (801) and a rectangular docking channel (802); The rectangular docking channel (802) is fixed to the bottom of the cover plate (801), and the top of the cover plate (801) is provided with a through hole that communicates with the inner cavity of the rectangular docking channel (802); The top of the n-shaped partition (2) is provided with a docking slot (3). When the cover plate (801) is closed on the top of the battery box (1), the rectangular docking channel (802) is inserted into the interior of the docking slot (3) to achieve docking with the n-shaped partition (2). Air flowing upward along the inner cavity of the n-shaped partition (2) can flow through the rectangular docking channel (802) to the area above the cover plate (801) for heat exchange with the air inside the battery box (1) that is in contact with the rectangular docking channel (802) and the cover plate (801).
3. A heat dissipation device for charging and discharging a battery pack according to claim 2, characterized in that, The upper heat dissipation assembly (8) also includes heat dissipation fins (803) and a top plate (804). The heat dissipation fins (803) are fixed to the top of the cover plate (801) and extend through the cover plate (801) to the bottom of the cover plate (801). The heat dissipation fins (803) and the rectangular docking channel (802) are distributed perpendicularly and alternately to each other. The top plate (804) is fixed to the top of the heat dissipation fins (803). The heat dissipation fins (803) are used to increase the heat exchange area with the air inside the battery box (1) and guide the air flowing upward from the rectangular docking channel (802) so that the air can fully contact the upper surface of the cover plate (801).
4. A heat dissipation device for charging and discharging a battery pack according to claim 2, characterized in that, The inner wall dimension of the outer box (4) is larger than the outer wall dimension of the battery box (1). Ventilation openings (6) that communicate with the inner cavity of the outer box (4) are provided on both sides of the outer wall near the top.
5. A heat dissipation device for charging and discharging a battery pack according to claim 2, characterized in that, Sealing elements are provided at the contact points between the rectangular docking channel (802) and the docking slot (3) and at the contact points between the cover plate (801) and the battery box (1).
6. A heat dissipation device for charging and discharging a battery pack according to claim 3, characterized in that, The bottom horizontal height of the heat dissipation fins (803) is higher than the bottom horizontal height of the rectangular docking channel (802), and when the rectangular docking channel (802) and the docking slot (3) are docked, the heat dissipation fins (803) do not contact the n-shaped partition (2).