Explosion-proof lithium battery pack

Abstract

The utility model discloses an explosion-proof lithium battery pack, which relates to the field of lithium battery packs and comprises a lithium battery main body and a plurality of battery cells mounted in the lithium battery main body, protective plates are fixed at two ends of the lithium battery main body, and a diversion heat dissipation frame sleeved on the plurality of battery cells is embedded and fixed in the lithium battery main body. A heat dissipation assembly is arranged between every two adjacent battery cells, connecting pipes arranged on the outer wall of the lithium battery main body in a protruding mode are fixed to the two ends of the flow guide heat dissipation frame, and heat dissipation grooves communicated with the heat dissipation assemblies are formed in the side walls of the protection plates. According to the lithium battery, external cooling water flows in the flow guide channels through the connecting pipes, the outer side of the battery cell group is cooled in the flowing process, the cooling fins and the connecting plates are communicated with the outside through the cooling grooves to dissipate heat, heat dissipation of the outside and the inside of the battery cell group is facilitated, and the heat dissipation effect of the lithium battery main body during charging is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery packs, specifically an explosion-proof lithium battery pack. Background Technology

[0002] Lithium-ion batteries are widely used in various fields due to their advantages such as high energy density, high power output, and good low-temperature performance. However, the safety and stability of lithium-ion batteries have always been a hot topic of concern. During the charging process, especially during high-voltage fast charging, lithium-ion batteries can reach high temperatures, and lithium-ion batteries exposed to high temperatures for extended periods pose safety hazards.

[0003] Patent application number 202321007005.8 discloses an explosion-proof and fire-resistant high-efficiency heat-dissipating lithium battery, including a protective box, a protective cover, a lithium battery, and a heat dissipation device. The upper part of the inner side of the protective box is provided with a limit slot, and the two sides of the middle part of the inner side of the protective box are provided with U-shaped fixing slots. A support plate is provided at the bottom of the U-shaped fixing slots. A cold water tank is provided at the lower part of the inner side of the protective box. Cold water pipes are provided on both sides inside the cold water tank. The protective box and the protective cover are provided. The protective box and the protective cover are made of cast aluminum alloy, and the outer shell is made of cast aluminum alloy in one die casting.

[0004] The cast aluminum alloy casing of the aforementioned explosion-proof and fire-resistant high-efficiency heat-dissipating lithium battery obstructs heat dissipation. Furthermore, it relies solely on a cold water tank embedded within the lithium battery for cooling. During the continuous cooling process, the cooling water in the cold water tank will heat up, making it difficult for the cold water tank to dissipate heat from the lithium battery for an extended period. Moreover, the high temperature of the cold water tank exacerbates the duration of high temperature in the lithium battery, resulting in poor heat dissipation performance. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide an explosion-proof lithium battery pack to solve the technical problem that the cooling water will heat up during the continuous cooling process of the cold water tank, which makes it difficult for the cold water tank to dissipate heat from the lithium battery for a long time, and the high temperature of the cold water tank aggravates the high temperature duration of the lithium battery, resulting in poor heat dissipation of the lithium battery.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof lithium battery pack, comprising a lithium battery body and multiple battery cells installed in the lithium battery body, both ends of the lithium battery body are fixed with protective plates, and a heat dissipation frame sleeved on the multiple battery cells is embedded and fixed in the lithium battery body, a heat dissipation component is provided between two adjacent battery cells, both ends of the heat dissipation frame are fixed with connecting pipes protruding from the outer wall of the lithium battery body, and the side wall of the protective plate is provided with a heat dissipation groove communicating with the heat dissipation component.

[0007] The present invention is further configured such that electrode posts are fixed on both sides of the top surface of the plurality of battery cells, and conductive strips are fixed between the plurality of electrode posts on the same side.

[0008] The present invention is further configured such that a top cover is embedded and fixed at the top of the lithium battery body, and conductive posts connected to conductive strips are fixedly installed on both sides of the top surface of the top cover.

[0009] The present invention is further configured such that through holes for accommodating connecting pipes are provided at both ends of the lithium battery body, and a control valve is installed on the connecting pipe.

[0010] The present invention is further configured such that both ends of the protective plate are equally spaced fastening bolts that are threaded into the lithium battery body, and the top of the protective plate is fitted with a sealing plate for sealing the heat dissipation groove.

[0011] The present invention is further configured such that a protrusion is fixed at the top of the sealing plate, and a knob bolt threaded into the sealing plate is installed on the side wall of the protective plate.

[0012] The present invention is further configured such that a flow guide plate that is in contact with the battery cell is fixed at the top of the flow guide heat dissipation frame, and a flow guide channel is provided between the flow guide heat dissipation frame and the flow guide plate.

[0013] The present invention is further configured such that the heat dissipation assembly includes heat sinks symmetrically arranged and attached to the battery cell, and a connecting plate fixed at equal intervals between the two heat sinks, wherein the two ends of the heat sinks are respectively fixedly connected to the flow guide plate and the flow guide heat dissipation frame.

[0014] In summary, this utility model has the following beneficial effects: The utility model embeds a heat dissipation frame fitted onto the battery cell within the lithium battery body. The heat dissipation frame allows external cooling water to flow through the flow channel via a connecting pipe, dissipating heat from the outside of the battery cell assembly during the flow process. Protective plates are fixed at both ends of the lithium battery body. When charging, the knob bolts are unscrewed, allowing the sealing plate to slide out from the top of the protective plate via a protrusion. After removal, the heat sink and connecting plate connect to the outside through the heat dissipation groove to dissipate heat. Simultaneously, the heat sink absorbs heat from the center of the battery cell assembly and transfers it to the flow plate and heat dissipation frame, facilitating heat dissipation from both the outside and inside of the battery cell assembly and improving the heat dissipation effect of the lithium battery body during charging. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the disassembled structure of the lithium battery body of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the battery cell of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the battery cell of this utility model.

[0019] In the diagram: 1. Lithium battery body; 2. Fastening bolt; 3. Knob bolt; 4. Protective plate; 5. Connecting pipe; 6. Top cover; 7. Conductive post; 8. Sealing plate; 9. Protrusion; 10. Heat dissipation groove; 11. Through hole; 12. Heat dissipation frame; 13. Guide plate; 14. Conductive strip; 15. Electrode post; 16. Battery cell; 17. Guide channel; 18. Connecting plate; 19. Heat sink. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] An explosion-proof lithium battery pack, such as Figure 1-4 As shown, the battery includes a lithium battery body 1 and multiple battery cells 16 installed in the lithium battery body 1. Both ends of the lithium battery body 1 are fixed with protective plates 4, and a heat dissipation frame 12 is embedded and fixed in the lithium battery body 1 and sleeved on the multiple battery cells 16. A heat dissipation component is provided between two adjacent battery cells 16. Both ends of the heat dissipation frame 12 are fixed with connecting pipes 5 protruding from the outer wall of the lithium battery body 1. The side wall of the protective plate 4 is provided with a heat dissipation groove 10 that communicates with the heat dissipation component.

[0022] Multiple battery cells 16 have electrode posts 15 fixed on both sides of their top surfaces. Conductive strips 14 are fixed between multiple electrode posts 15 on the same side. A top cover 6 is embedded in the top of the lithium battery body 1. Conductive posts 7 connected to the conductive strips 14 are fixedly installed on both sides of the top surface of the top cover 6. Both ends of the lithium battery body 1 have through holes 11 for accommodating connecting pipes 5. A control valve (not shown in the figure) is installed on the connecting pipe 5. The connecting pipe 5 is a rigid pipe. During charging, rubber pipes are fitted onto two connecting pipes 5, and one of the rubber pipes is connected to a water supply device of a tap water pipe or a water pump. Cooling water enters from one connecting pipe 5 and exits from the other connecting pipe 5. The water supply pipes of the water pump and tap water pipe are existing equipment and will not be described in detail. The heat dissipation rack 12 allows external cooling water to flow in the flow channel 17 through the connecting pipe 5, and dissipates heat on the outside of the battery cell 16 group during the flow.

[0023] Furthermore, both ends of the protective plate 4 are equidistantly fitted with fastening bolts 2 that are threaded into the lithium battery body 1, and the top of the protective plate 4 is fitted with a sealing plate 8 for sealing the heat dissipation groove 10. The top of the sealing plate 8 is fixed with a protrusion 9, and the side wall of the protective plate 4 is fitted with a knob bolt 3 that is threaded into the sealing plate 8. The top of the heat dissipation frame 12 is fixed with a heat guide plate 13 that is in contact with the battery cell 16, and a heat guide channel 17 is provided between the heat dissipation frame 12 and the heat guide plate 13. The heat dissipation assembly includes heat dissipation fins 19 that are symmetrically arranged and in contact with the battery cell 16. A connecting plate 18 is fixed equidistantly between two heat sinks 19. The two ends of the heat sink 19 are fixedly connected to the flow guide plate 13 and the flow guide heat dissipation frame 12, respectively. Protective plates 4 are fixed at both ends of the lithium battery body 1. When the lithium battery body 1 is charging, the knob bolt 3 is unscrewed, and the protrusion 9 causes the sealing plate 8 to slide out from the top of the protective plate 4. After it is moved out, the heat sink 19 and the connecting plate 18 are connected to the outside through the heat dissipation groove 10 to dissipate heat. At the same time, the heat sink 19 absorbs the heat at the center of the battery cell 16 group and then transfers it to the flow guide plate 13 and the flow guide heat dissipation frame 12.

[0024] The working principle of this utility model is as follows: When charging the lithium battery body 1, unscrew the knob bolt 3, hold the protrusion 9 to slide the sealing plate 8 out from the top of the protective plate 4, and after it is moved out, the heat sink 19 and the connecting plate 18 are connected to the outside through the heat dissipation groove 10 to dissipate heat. At the same time, the heat sink 19 absorbs the heat at the center of the battery cell 16 group and transfers it to the flow guide plate 13 and the flow guide heat dissipation frame 12. Connect the two connecting pipes 5 to the rubber pipe, and connect the rubber pipe to the water supply equipment of the tap water pipe or water pump, so that the cooling water enters from one connecting pipe 5 and exits from the other connecting pipe 5. The flow guide heat dissipation frame 12 allows the external cooling water to flow in the flow channel 17 through the connecting pipe 5, and dissipates heat on the outside of the battery cell 16 group during the flow. When the lithium battery body 1 is charging, it is convenient to dissipate heat on the outside and inside of the battery cell 16 group, thus improving the heat dissipation effect of the lithium battery body 1 during charging.

[0025] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An explosion-proof lithium battery pack comprising a lithium battery body (1) and a plurality of battery cells (16) installed in the lithium battery body (1), characterized in that: The lithium battery body (1) is fixed with protective plates (4) at both ends, and a heat dissipation frame (12) is embedded and fixed in the lithium battery body (1) and sleeved on multiple cells (16). A heat dissipation component is provided between two adjacent cells (16). A connecting pipe (5) protruding from the outer wall of the lithium battery body (1) is fixed at both ends of the heat dissipation frame (12). A heat dissipation groove (10) communicating with the heat dissipation component is opened on the side wall of the protective plate (4).

2. The explosion-proof lithium battery pack according to claim 1, characterized in that: Electrode posts (15) are fixed on both sides of the top surface of the multiple battery cells (16), and conductive strips (14) are fixed between the multiple electrode posts (15) on the same side.

3. The explosion-proof lithium battery pack according to claim 2, characterized in that: The top of the lithium battery body (1) is embedded with a top cover (6), and conductive posts (7) connected to the conductive strip (14) are fixedly installed on both sides of the top surface of the top cover (6).

4. The explosion-proof lithium battery pack according to claim 1, characterized in that: Both ends of the lithium battery body (1) are provided with through holes (11) for accommodating the connecting pipe (5), and a control valve is installed on the connecting pipe (5).

5. The explosion-proof lithium battery pack according to claim 1, wherein: Both ends of the protective plate (4) are equally spaced fastening bolts (2) that are threaded into the lithium battery body (1), and the top of the protective plate (4) is fitted with a sealing plate (8) for sealing the heat dissipation groove (10).

6. The explosion-proof lithium battery pack according to claim 5, characterized in that: The top of the sealing plate (8) is fixed with a protrusion (9), and the side wall of the protective plate (4) is fitted with a knob bolt (3) that is threaded into the sealing plate (8).

7. The explosion-proof lithium battery pack according to claim 1, wherein: The top of the heat dissipation frame (12) is fixed with a heat guide plate (13) that is in contact with the battery cell (16), and a heat guide channel (17) is provided between the heat dissipation frame (12) and the heat guide plate (13).

8. The explosion-proof lithium battery pack according to claim 7, characterized in that: The heat dissipation assembly includes heat sinks (19) symmetrically arranged and attached to the battery cell (16) and connecting plates (18) fixed at equal intervals between the two heat sinks (19). The two ends of the heat sinks (19) are fixedly connected to the flow guide plate (13) and the flow guide heat dissipation frame (12) respectively.

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