Cooling system of lithium battery chain saw battery pack

Abstract

The utility model provides a cooling system of a lithium battery chain saw battery pack, which comprises a battery bin for accommodating the battery pack, a plurality of lithium battery cores arranged in the battery bin, and a first support and a second support which are used for fixing the lithium battery cores and are arranged in the battery bin. The first bracket and the second bracket are correspondingly mounted to form a plurality of battery core mounting holes which are arranged in a parallel array, a heat dissipation channel is arranged between every two adjacent battery core mounting holes, and the battery pack comprises a battery pack upper shell with an air inlet window and a battery pack lower shell with a first air outlet window. A second air outlet window corresponding to the first air outlet window is further formed in the bottom of the battery bin. According to the utility model, an air circulation path is provided, the surface of the battery core can be cooled, and the battery core is prevented from being damaged due to overheating.

Description

Technical Field

[0001] The utility model relates to the technical field of garden tools, in particular to a cooling system for a lithium electric chain saw battery pack. Background Art

[0002] With the development of society and the progress of science, people have higher and higher requirements for environmental protection. Traditional gasoline engine chainsaws will release a lot of CO, CO2 and other gases and noise when in use, causing air and noise pollution; so most of the lithium-powered chainsaws now use lithium batteries as power. The power battery packs of household chainsaws and professional chainsaws on the market usually use the main motor air duct for heat dissipation, or the structure of external battery packs, or even directly have no heat dissipation ducts. After using the lithium-powered chainsaws on the market for a period of time, the battery pack overheats and the circuit board starts the protection program, forcing the battery pack to be interrupted or even causing damage to the battery pack due to high temperature. This greatly affects work efficiency and safety of use. Summary of the invention

[0003] In order to solve the above-mentioned problems of the prior art, the utility model provides a cooling system for a lithium-ion chain saw battery pack, which can effectively dissipate heat and cool the lithium battery cells in the battery pack, thereby extending the service life of the battery pack and avoiding some safety hazards caused by overheating.

[0004] The technical solutions adopted are as follows:

[0005] A cooling system for a lithium-ion chain saw battery pack comprises a battery compartment for accommodating the battery pack, a plurality of lithium battery cells arranged in the battery pack, a first bracket and a second bracket for fixing the lithium battery cells are arranged in the battery pack, the first and second brackets are correspondingly installed to form a plurality of battery cell mounting holes arranged in a parallel array, the lithium battery cells are installed in the battery cell mounting holes, a heat dissipation channel is provided between adjacent lithium battery cells, the battery pack comprises a battery pack upper shell provided with an air inlet window, a battery pack lower shell provided with a first air outlet window, and a second air outlet window corresponding to the first air outlet window is also provided at the bottom of the battery compartment.

[0006] Furthermore, the upper end of the battery compartment is provided with an opening for inserting the battery pack.

[0007] Furthermore, the battery pack is installed in the battery compartment by means of buckles.

[0008] Furthermore, the first bracket and the second bracket are fixed on the lower shell of the battery pack through guide grooves.

[0009] Furthermore, the battery pack upper shell is fixed to the battery pack lower shell by screws.

[0010] Furthermore, the battery compartment is arranged at one end of the chain saw, and the chain saw is also provided with a motor.

[0011] Compared with the prior art, the beneficial effects produced by the utility model are:

[0012] The utility model provides a cooling system for a lithium chain saw battery pack, including a battery pack arranged in a battery compartment, and a motor arranged outside the compartment, wherein an air inlet window is arranged on an upper shell of the battery pack, a first air outlet window is arranged on a lower shell of the battery pack, and a second air outlet window is arranged at a position corresponding to the first air outlet window at the bottom of the battery compartment. A plurality of lithium battery cells fixed by a first and a second bracket are arranged inside the battery pack, and gaps are left between adjacent lithium battery cells as heat dissipation channels. When the fan blades of the motor rotate, air enters the air inlet window of the upper shell of the battery pack under the change of air pressure, passes through the heat dissipation channels between the lithium battery cells, and exits from the first and second air outlet windows, and a steady stream of cold air passes through the lithium battery cells to cool and dissipate the heat, thereby preventing the lithium battery cells from being damaged due to excessive temperature, and extending the service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial structural schematic diagram of the chain saw of the utility model;

[0014] Figure 2 It is a cross-sectional view of the interior of the chain saw of the utility model;

[0015] Figure 3 It is a schematic diagram of the upper shell of the battery pack of the utility model;

[0016] Figure 4 It is a schematic diagram of the lower shell of the battery pack of the utility model;

[0017] Figure 5 This is a schematic diagram of disassembling the battery pack and battery compartment of the utility model;

[0018] Figure 6 It is a partial schematic diagram of the battery pack of the utility model;

[0019] Figure 7 This is a side view of the interior of the battery pack of the utility model;

[0020] Figure 8 for Figure 7 Section view in the direction of AA;

[0021] Among them, the battery pack 1, the battery pack upper shell 101, the battery pack lower shell 102, the battery compartment 2, the lithium battery cell 3, the first bracket 4, the second bracket 5, the battery cell mounting hole 6, the heat dissipation channel 7, the air inlet window 8, the first air outlet window 9, the second air outlet window 10, the chain saw 11, the motor 12, the side plate 13, and the guide groove 14. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with specific implementation methods.

[0023] refer to Figure 1-8 A cooling system for a lithium electric chain saw battery pack comprises a battery compartment 2 for accommodating a battery pack 1, a plurality of lithium battery cells 3 arranged in the battery pack 1, a first bracket 4 and a second bracket 5 for fixing the lithium battery cells 3 are arranged in the battery compartment 2, the first and second brackets are correspondingly installed to form a plurality of battery cell mounting holes 6 arranged in a parallel array, the lithium battery cells 3 are installed in the battery cell mounting holes 6, and a heat dissipation channel 7 is arranged between adjacent lithium battery cells 3, the battery pack 1 comprises a battery pack upper shell 101 provided with an air inlet window 8, and a battery pack lower shell 102 provided with a first air outlet window 9, and a second air outlet window 10 corresponding to the first air outlet window 9 is also provided at the bottom of the battery compartment 2.

[0024] The upper end of the battery compartment 2 is provided with an opening for inserting the battery pack 1. The battery pack 1 is inserted into the battery compartment 2 for power supply. The battery pack 1 is fixed to the battery compartment 2 by a buckle. The battery compartment 2 is provided at one end of the chain saw 11. The chain saw 11 is also provided with a motor 12. The battery pack 1 supplies power to the motor 12, and the motor rotates to drive the chain saw to work.

[0025] The first and second brackets are mounted together by screws, and the two brackets are mounted together to fix the lithium battery core 3. The first bracket 4 and the second bracket 5 are fixed to the side plate 13 of the battery pack through the guide groove 14.

[0026] The battery pack upper shell 101 is fixed to the battery pack lower shell 102 by screws, and the two are connected and fixed to wrap the lithium battery core 3 inside.

[0027] The adjacent lithium battery cells 3 are not attached together, but are provided with gaps as heat dissipation channels 7 to prevent the battery from being damaged due to overheating.

[0028] When the lithium chain saw motor is running, the air inside the machine body is discharged to the outside of the machine body as the fan blades of the motor 12 rotate, and a low-pressure area is formed inside the machine body at this time; due to the pressure difference between the inside and the outside, the air outside the machine body will enter the battery pack 1 through the air inlet window 8 of the upper shell of the battery pack, and pass through the heat dissipation channel between the lithium battery cells 3, and then enter the lithium chain saw machine body through the first air outlet window 9 of the lower shell of the battery pack 102 and the second air outlet window 10 at the bottom of the battery compartment 2, and finally be discharged from the machine body through the motor fan blades;

[0029] When the fan blades of the chain saw motor 12 rotate, the hot air inside the body will be continuously discharged, and the normal temperature air outside the body will be sucked into the battery pack through the air inlet window 8 of the battery pack upper shell 101 due to the pressure difference. When the new air flow passes through the heat dissipation channel 7 between the battery cells, the temperature of the battery cell surface will be reduced, and then discharged from the body through the first air outlet window of the battery pack lower shell and the second air outlet window of the battery compartment by the motor fan blades.

[0030] The utility model improves the flow and circulation of air in the battery pack, forms a complete air circulation path, thereby achieving the purpose of heat dissipation of the battery pack, realizes the cooling of the battery pack, and solves the problem of the battery pack starting the protection program and being damaged due to overheating.

[0031] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A cooling system for a lithium chain saw battery pack, comprising a battery compartment (2) for accommodating the battery pack (1), and a plurality of lithium battery cells (3) arranged in the battery pack (1), characterized in that: The battery pack (1) is provided with a first bracket (4) and a second bracket (5) for fixing the lithium battery core (3); the first and second brackets are installed correspondingly to form a plurality of battery core installation holes (6) arranged in a parallel array; the lithium battery core (3) is installed in the battery core installation hole (6); a heat dissipation channel (7) is provided between adjacent lithium battery cores (3); the battery pack (1) comprises a battery pack upper shell (101) provided with an air inlet window (8) and a battery pack lower shell (102) provided with a first air outlet window (9); and a second air outlet window (10) corresponding to the first air outlet window (9) is further provided at the bottom of the battery compartment (2).

2. The cooling system for the lithium chain saw battery pack according to claim 1, characterized in that: The upper end of the battery compartment (2) is provided with an opening for inserting the battery pack (1).

3. The cooling system for the lithium chain saw battery pack according to claim 1, characterized in that: The battery pack (1) is mounted in the battery compartment (2) via a buckle.

4. The cooling system for a lithium chain saw battery pack according to claim 1, characterized in that: The first bracket (4) and the second bracket (5) are fixed on the side plate (13) of the battery pack via the guide groove (14).

5. The cooling system for the lithium chain saw battery pack according to claim 1, characterized in that: The battery pack upper shell (101) is fixed to the battery pack lower shell (102) by means of screws.

6. The cooling system for the lithium chain saw battery pack according to claim 1, characterized in that: The battery compartment (2) is arranged at one end of the chain saw (11), and the chain saw (11) is also provided with a motor (12).

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