Lithium battery pack

Abstract

The utility model discloses a lithium battery pack, which relates to the technical field of new energy automobiles, and comprises a battery pack main body, the outer surface of the battery pack main body is connected with a barrier strip, both sides of the battery pack main body are provided with slots, both sides of the slots are connected with protective plates, the outer surfaces of the protective plates are provided with ventilation openings, and the inner parts of the protective plates are connected with clapboards. Through the arrangement of the protective plate, the ventilation opening, the heat conducting plate, the cooling fins, the heat conducting silicone grease pad and the partition plates, the partition plates are arranged in the protective plate to form a three-layer protective structure, and the heat conducting plate and the cooling fins are matched to form a multi-layer protective structure, so that the impact resistance of the battery pack main body is effectively improved; heat generated when the battery pack main body works is dissipated to the outside, so that heat dissipation of the battery pack main body is prevented from being affected by wrapping of the protective plate; the impact resistance is good, so that the damage to the battery pack main body caused by collision is effectively reduced, and meanwhile, the heat dissipation performance of the battery pack main body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a lithium battery pack. Background Art

[0002] Existing new energy vehicles mainly use lithium batteries as power batteries. The battery pack is the power core of new energy vehicles, which includes battery cells, various modules, cooling systems, etc., among which the battery cell is the container for storing electrical energy.

[0003] Existing lithium battery packs are usually installed on the chassis of new energy vehicles. Such an installation position can effectively reduce the battery pack's encroachment on the space inside the vehicle. It can also be used as a part of the vehicle chassis frame, that is, battery-chassis integration technology, which is also the development trend of new energy electric vehicles.

[0004] However, because the battery pack is installed at the bottom of the car, during the driving process, gravel and other debris on the road are crushed by the tires, or the driver collides with it by mistake, which can easily cause the battery pack to be damaged. This is also a common battery pack accident now. Although guard plates can be installed for protection, the existing chassis guard plates are usually thin single-layer structures, which can easily be smashed or knocked through by flying gravel on the road. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide a lithium battery pack to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium battery pack, comprising a battery pack body, a baffle connected to the outer surface of the battery pack body, and slots are provided on both sides of the battery pack body, guard plates are connected to both sides of the slots, and vents are provided on the outer surface of the guard plates, a partition is connected to the inside of the guard plates, and a heat conducting plate is connected to the top of the guard plates, a heat sink is connected to the bottom of the heat conducting plate, and a thermally conductive silicone pad is arranged on the top of the heat conducting plate.

[0007] By adopting the above technical solution, a three-layer protection structure is formed by setting partitions inside the protective plate, and then a multi-layer protection structure is formed in combination with a heat conducting plate and a heat sink, thereby effectively improving the impact resistance of the battery pack body. At the same time, the heat generated by the battery pack body during operation is dissipated to the outside through the cooperation of the vents, heat conducting plates, heat sinks and thermal grease pads, thereby preventing the protective plate from affecting the heat dissipation of the battery pack body.

[0008] Furthermore, the guard plate is detachably connected to the battery pack body through a slot, and both sides of the top of the guard plate are in the shape of a "7".

[0009] By adopting the above technical solution, when the guard plate and the partition are severely damaged, the guard plate can be limited by rotating the baffle bar, and then the guard plate can be directly removed. When installing, just insert the new guard plate into the slot and then turn the baffle bar downward; it is convenient to quickly replace the damaged guard plate.

[0010] Furthermore, the guard plate abuts against the baffle bar, and the baffle bar is rotatably connected to the battery pack body.

[0011] By adopting the above technical solution, the staff applies thermal grease on the top of the heat conductive plate on the guard plate to form a thermal grease pad before installing the guard plate. Then the staff turns the baffle upward and aligns the guard plate with the slot to install it into the battery pack body. Then the staff turns the baffle downward so that the baffle and the guard plate are against each other, thereby limiting the position of the guard plate.

[0012] Furthermore, a plurality of heat sinks are provided, and the plurality of heat sinks are equidistantly distributed.

[0013] By adopting the above technical solution, the battery pack body generates heat during discharge. At this time, part of the heat generated by the battery pack body is transferred to the heat sink through the heat conduction plate. At the same time, the gap between the heat conduction plate and the inspection plate is filled by the thermal grease pad to increase the heat transfer efficiency. The movement of the vehicle causes the heat sink and the outside air to move relative to each other, and the outside air can enter the guard plate through the vents, thereby dissipating the heat of the heat sink to the outside.

[0014] Furthermore, the guard plate and the partition are both made of MC nylon material.

[0015] By adopting the above technical solution, a three-layer protection structure is formed by setting partitions inside the protective plate, and then a multi-layer protection structure is formed with a heat conducting plate and a heat sink, thereby effectively improving the impact resistance of the battery pack body.

[0016] Furthermore, the heat conducting plate is made of copper material, and the heat sink is made of aluminum material, and the heat sink runs through the top of the guard plate and the partition.

[0017] By adopting the above technical solution, the heat generated by the battery pack body during operation can be dissipated to the outside through the cooperation of the vents, heat conduction plates, heat sinks and thermal grease pads, thus preventing the protective plate from affecting the heat dissipation of the battery pack body.

[0018] Furthermore, sealing gaskets are connected to both sides of the top of the guard plate, and the sealing gaskets are made of rubber material.

[0019] By adopting the above technical solution, the oxidation and rusting of the copper heat conducting plate can be effectively avoided by shielding with a sealing gasket and semi-wrapping with a protective plate. At the same time, the sealing gasket can slow down the oxidation rate of the bolts, avoiding oxidation and rusting of the bolt surface due to reduced rust resistance due to wear after the battery pack body is repaired, and can increase the waterproofness of the battery pack body.

[0020] Furthermore, an inspection plate is connected in the middle of the bottom of the battery pack body, and bolts penetrate through both sides of the bottom of the inspection plate.

[0021] By adopting the above technical solution, the staff can remove the bolts to facilitate the disassembly of the inspection plate. After the inspection plate is removed, it is convenient for the staff to inspect the battery pack body or replace accessories such as battery cells.

[0022] In summary, the utility model mainly has the following beneficial effects:

[0023] 1. The utility model provides a protective plate, vents, heat conducting plate, heat sink, thermal conductive silicone pad and partition, forms a three-layer protective structure by arranging a partition inside the protective plate, and then forms a multi-layer protective structure with the heat conducting plate and the heat sink, so as to effectively improve the impact resistance of the battery pack body. At the same time, the heat generated by the battery pack body during operation is dissipated to the outside through the cooperation of the vents, heat conducting plate, heat sink and thermal conductive silicone pad, so as to avoid the protective plate wrapping affecting the heat dissipation of the battery pack body; the good impact resistance effectively reduces the damage to the battery pack body caused by bumps, and at the same time increases the heat dissipation performance of the battery pack body;

[0024] 2. The utility model provides the baffle and slot. When the guard plate and the partition are seriously damaged, the baffle can be rotated to stop the position limit of the guard plate, and then the guard plate can be directly removed. When installing, only the new guard plate needs to be inserted into the slot and the baffle is rotated downward. It is convenient to quickly replace the damaged guard plate.

[0025] 3. The utility model effectively prevents the oxidation and rusting of the copper heat conducting plate by setting a sealing gasket, shielding the sealing gasket and semi-wrapping the guard plate. At the same time, the sealing gasket can slow down the oxidation rate of the bolt, avoiding oxidation and rusting of the bolt surface due to wear and tear after the battery pack body is repaired, and can increase the waterproofness of the battery pack body; increase the waterproofness of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the side section structure of the guard plate of the utility model;

[0028] Figure 3 For the utility model Figure 2 A magnified view of the structure at A;

[0029] Figure 4 It is a schematic diagram of the explosion structure of the guard plate of the utility model.

[0030] In the figure: 1. Battery pack body; 2. Inspection panel; 3. Bolts; 4. Guard plate; 5. Baffle; 6. Vent; 7. Slot; 8. Sealing gasket; 9. Heat conduction plate; 10. Heat sink; 11. Thermal grease pad; 12. Partition. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0032] The following describes an embodiment of the utility model based on its overall structure. Embodiment 1:

[0033] A lithium battery pack, such as Figure 1-Figure 4 As shown, it includes a battery pack body 1, a baffle 5 is connected to the outer surface of the battery pack body 1, and slots 7 are provided on both sides of the battery pack body 1 to facilitate the disassembly and assembly of the guard plate 4; guard plates 4 are connected to both sides of the slot 7, and partitions 12 are connected inside the guard plate 4. The guard plate 4 and the partition 12 are both made of MC nylon material to form a three-layer protection structure to improve the impact resistance of the battery pack body 1; a vent 6 is provided on the outer surface of the guard plate 4, a heat conducting plate 9 is connected to the top of the guard plate 4, the heat conducting plate 9 is made of copper material, and a plurality of heat sinks 10 are connected to the bottom of the heat conducting plate 9. The plurality of heat sinks 10 are equidistantly distributed and made of aluminum material, and the plurality of heat sinks 10 all pass through the top of the guard plate 4 and the partition 12, and a thermal silicone grease pad 11 is provided on the top of the heat conducting plate 9 to prevent the wrapping of the guard plate 4 from affecting the heat dissipation of the battery pack body 1 and to improve the impact resistance of the battery pack body 1.

[0034] See also Figure 2 In the above embodiment, an inspection plate 2 is connected to the middle of the bottom of the battery pack body 1, and bolts 3 are passed through both sides of the bottom of the inspection plate 2, which is convenient for the staff to inspect the battery pack body 1 or replace the battery cells.

[0035] See also Figure 1-Figure 4 In the above embodiment, the guard plate 4 is detachably connected to the battery pack body 1 through the slot 7, and both sides of the top of the guard plate 4 are in the shape of a "7". The guard plate 4 abuts against the baffle bar 5, and the baffle bar 5 is rotatably connected to the battery pack body 1, which facilitates the disassembly and assembly of the guard plate 4. Embodiment 2:

[0036] Based on the above embodiment 1, Figure 2-Figure 4As shown, sealing gaskets 8 are connected to both sides of the top of the guard plate 4 . The sealing gaskets 8 are made of rubber material to increase the waterproofness of the battery pack body 1 .

[0037] The implementation principle of the utility model is as follows: first, a three-layer protection structure is formed by setting a partition 12 inside the guard plate 4, and then a multi-layer protection structure is formed by setting a heat conducting plate 9 and a heat sink 10, which effectively improves the impact resistance of the battery pack body 1. At the same time, the heat conducting plate 9 is shielded by the sealing gasket 8 and the thermal conductive silicone pad 11, and the guard plate 4 half-wraps the heat conducting plate 9, which effectively prevents the heat conducting plate 9 made of copper from being oxidized and rusted. The sealing gasket 8 can slow down the oxidation rate of the bolt 3, which prevents the surface of the bolt 3 from being oxidized and rusted due to wear and tear after the battery pack body 1 is repaired, and can increase the waterproofness of the battery pack body 1.

[0038] During the driving of the vehicle, the battery pack body 1 discharges and generates heat. At this time, part of the heat generated by the battery pack body 1 is transferred to the heat sink 10 through the heat conduction plate 9. At the same time, the gap between the heat conduction plate 9 and the inspection plate 2 is filled by the thermal grease pad 11 to increase the heat transfer efficiency. The driving of the vehicle causes the heat sink 10 to move relative to the outside air, and the outside air can enter the guard plate 4 through the vent 6, so that the heat of the heat sink 10 is dissipated to the outside, avoiding the wrapping of the guard plate 4 to affect the heat dissipation of the battery pack body 1;

[0039] When the guard plate 4 is severely damaged by collision, or when the battery pack body 1 needs to be repaired, the staff rotates the blocking bar 5 upward to end the shielding of the guard plate 4, and then the staff can directly remove the guard plate 4 from the battery pack body 1;

[0040] Before installing the guard plate 4, the staff applies thermal grease on the top of the heat conductive plate 9 on the guard plate 4 to form a thermal grease pad 11. Then the staff rotates the baffle 5 upward and aligns the guard plate 4 with the slot 7 to install it into the battery pack body 1. Then the staff rotates the baffle 5 downward so that the baffle 5 is against the guard plate 4, thereby limiting the position of the guard plate 4.

[0041] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A lithium battery pack, comprising a battery pack body (1), characterized in that: The outer surface of the battery pack body (1) is connected to a baffle (5), and slots (7) are provided on both sides of the battery pack body (1), the two sides of the slots (7) are connected to a guard plate (4), and the outer surface of the guard plate (4) is provided with a vent (6), the interior of the guard plate (4) is connected to a partition plate (12), and the top of the guard plate (4) is connected to a heat conducting plate (9), the bottom of the heat conducting plate (9) is connected to a heat sink (10), and a heat conducting silicone pad (11) is provided on the top of the heat conducting plate (9).

2. The lithium battery pack according to claim 1, characterized in that: The guard plate (4) is detachably connected to the battery pack body (1) via a slot (7), and both sides of the top of the guard plate (4) are in the shape of a "7".

3. The lithium battery pack according to claim 2, characterized in that: The guard plate (4) abuts against the baffle bar (5), and the baffle bar (5) is rotatably connected to the battery pack body (1).

4. The lithium battery pack according to claim 1, characterized in that: A plurality of the heat sinks (10) are provided, and the plurality of heat sinks (10) are distributed at equal intervals.

5. The lithium battery pack according to claim 3, characterized in that: The guard plate (4) and the partition plate (12) are both made of MC nylon material.

6. The lithium battery pack according to claim 4, characterized in that: The heat conducting plate (9) is made of copper material, and the heat sink (10) is made of aluminum material; the heat sink (10) runs through the top of the guard plate (4) and the partition plate (12).

7. The lithium battery pack according to claim 1, characterized in that: Sealing pads (8) are connected to both sides of the top of the guard plate (4), and the sealing pads (8) are made of rubber material.

8. The lithium battery pack according to claim 1, characterized in that: An inspection plate (2) is connected to the middle of the bottom of the battery pack body (1), and bolts (3) penetrate through both sides of the bottom of the inspection plate (2).

Images