Battery pack with protective shell

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack with a protective shell, which comprises an upper shell and a lower shell, an air inlet is arranged at the top end of the upper shell, an air outlet dustproof net is mounted at the top end of the upper shell, and a step-by-step heat dissipation mechanism is connected inside the air inlet. The battery temperature change condition can be rapidly collected, the step-by-step heat dissipation mechanism can be electrically conducted when the battery temperature rises, step-by-step heat dissipation is conducted according to the temperature rise, local overheating is avoided, the battery pack always works in a proper temperature range, and an alarm function is arranged so that an alarm can be immediately given out when the temperature is too high or a heat dissipation system cannot dissipate heat. A user can quickly respond and take necessary measures to prevent further deterioration of problems, and the alarm function not only improves the safety of the battery pack, but also reduces potential risks caused by overheating of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack with a protective shell. Background Art

[0002] With the development of science and technology, in order to adapt to the greater power storage needs of mobile electrical equipment, battery packs are required to have an electrical storage structure with a larger capacity. In the actual use of battery packs, due to the large amount of heat generated by the battery during the charging and discharging process, multiple battery packs are located in the same space, which can easily cause the internal space to overheat. Continuous high temperature will affect the service life of the battery pack and make it unable to work normally, and may even cause the battery to catch fire or explode.

[0003] The battery pack of the protective shell of the prior art can only use a single cooling fan to dissipate the heat generated inside. However, the heat generated by the existing battery gradually increases, and the single air cooling heat dissipation effect is poor. It cannot dissipate the heat step by step according to the actual situation of the battery pack temperature increase, and it cannot warn the user in time. When the battery pack temperature gets out of control during the heat dissipation process, the battery pack cannot be effectively handled in time. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a battery pack with a protective shell, which can effectively solve the problem that the single air cooling heat dissipation effect of the prior art is poor and cannot effectively dissipate the heat of the battery pack, and cannot promptly warn the user when the battery pack temperature gets out of control during the heat dissipation process and cannot be promptly handled.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A battery pack with a protective shell comprises: an upper shell and a lower shell that are buckled together, an air inlet is provided at the top of the upper shell, and an air outlet dust screen is installed at the top of the upper shell, a step-by-step heat dissipation mechanism is connected inside the air inlet, a heat conduction plate is fixedly connected to the bottom of the inner cavity of the lower shell, a plurality of battery packs are fixedly connected to the upper surface of the heat conduction plate, and a support foot is fixedly connected to the bottom of the lower shell.

[0007] Preferably, the step-by-step heat dissipation mechanism includes a connecting rod fixedly connected to the middle of the lower surface of the dustproof plate, and the outer wall of the connecting rod is rotatably connected to the first fan, the second fan, and the third fan, and the first fan, the second fan, and the third fan are fixed at equal distances.

[0008] Preferably, a plurality of air outlets are evenly arranged at the bottom of the lower shell, and the air outlets are located in the gaps between the battery packs, and a dustproof net is fixedly connected to the inner walls of the plurality of air outlets.

[0009] Preferably, a conductive sensor mechanism is fixedly mounted on the upper surface of the heat conducting plate, and the position of the conductive sensor mechanism corresponds to the alarm.

[0010] Preferably, the conductive sensing mechanism includes a shell fixedly connected to the upper wall of the heat conducting plate, a heat collecting block is fixedly installed on the bottom of the inner wall of the shell, the bottom of the heat collecting block is fixedly connected to the upper wall of the heat conducting plate, a sliding plate is slidably connected to the inner wall of the shell, and a conductive tube is fixedly connected to the upper end of the sliding plate, and a first pair of conductive blocks, a second pair of conductive blocks, a third pair of conductive blocks, and a fourth pair of conductive blocks are provided at the upper end of the shell.

[0011] Preferably, the first pair of conductive blocks and the first fan, the second pair of conductive blocks and the second fan, the third pair of conductive blocks and the third fan, and the fourth pair of conductive blocks and the alarm are all connected in series with a power supply device, and the first fan, the second fan, the third fan, and the alarm are arranged in parallel.

[0012] Compared with the known prior art, the technical solution provided by the utility model has the following beneficial effects:

[0013] Through the heat collecting and conductive mechanism on the heat conducting plate, the changes in the heat generated by the battery can be quickly collected, and the step-by-step heat dissipation mechanism can be energized to achieve the effect of step-by-step heat dissipation of the battery pack. By gradually enhancing the heat dissipation, the heat dissipation of the fan is always greater than the heat generated by the battery pack, so that the battery pack always operates within an appropriate temperature range. Secondly, the alarm function can monitor when the battery pack temperature is too high or the heat dissipation system fails, and an alarm can be issued immediately. The user can respond quickly and take necessary measures to prevent the problem from further deteriorating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional mechanism of the utility model;

[0016] Figure 2 It is a front cross-sectional view of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the lower shell of the utility model;

[0018] Figure 4 It is a front cross-sectional view of the conductive sensing mechanism of the utility model;

[0019] Figure 5 It is a front cross-sectional view of the upper shell of the utility model.

[0020] Figure numerals: 1. upper shell; 2. lower shell; 3. support foot; 4. air inlet; 401. dustproof plate; 5. air outlet; 6. heat conducting plate; 7. heat collecting and conductive mechanism; 701. heat collecting block; 702. sliding plate; 703. conductive tube; 704. outer shell; 705. first pair of conductive blocks; 706. second pair of conductive blocks; 707. third pair of conductive blocks; 708. fourth pair of conductive blocks; 8. first fan; 9. second fan; 10. third fan; 11. alarm; 12. dustproof net; 13. battery pack; 14. connecting rod. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model is further described below in conjunction with embodiments.

[0023] Example:

[0024] A battery pack with a protective shell comprises an upper shell 1 and a lower shell 2 which are buckled together, an air inlet 4 is provided at the top of the upper shell 1, and a dustproof plate 401 is fixedly installed at the top of the air inlet 4, a step-by-step heat dissipation mechanism is connected inside the air inlet 4, a heat conducting plate 6 is fixedly connected to the bottom of the inner cavity of the lower shell 2, a plurality of battery packs 13 are fixedly connected to the upper surface of the heat conducting plate 6, and a support foot 3 is fixedly connected to the bottom of the lower shell 2.

[0025] According to the principle of air intake at the top of the upper shell 1 and air outlet at the bottom of the lower shell 2, the battery pack 13 inside the lower shell 2 is naturally cooled. The air inlet 4 is installed at the top of the upper shell 1 and the dustproof net 12 is installed at the bottom of the lower shell 2. It can effectively prevent dust from entering the battery pack and affecting the working efficiency of the step-by-step heat dissipation mechanism, and effectively protect the electronic components in the lower shell 2. The support leg 3 supports the lower shell 2 to expand the air outlet and heat dissipation. The heat conducting plate 6 at the bottom of the battery pack 13 can collect temperature changes in real time to dissipate the heat of the battery pack 13 through the step-by-step heat dissipation mechanism.

[0026] refer to Figure 2Specifically, a plurality of air outlets 5 are evenly arranged at the bottom of the lower shell 2, and the air outlets 5 are arranged in the gaps between the battery packs 13, and the inner walls of the plurality of air outlets 5 are fixedly connected with dustproof nets 12. It should be noted that the gaps between the battery packs 13 on the heat conducting plate 6 are provided with cavities corresponding to the positions of the air outlets 5.

[0027] refer to Figure 2 and Figure 5 Specifically, the step-by-step heat dissipation mechanism includes a connecting rod 14 fixedly connected to the middle of the lower surface of the dustproof plate 401, and the outer wall of the connecting rod 14 is rotatably connected to the first fan 8, the second fan 9, and the third fan 10, and the first fan 8, the second fan 9, and the third fan 10 are equidistantly fixed.

[0028] When the temperature of the battery pack 13 continues to rise, the first fan 8, the second fan 9, and the third fan 10 achieve a step-by-step heat dissipation effect, and the first fan 8, the second fan 9, and the third fan 10 rotate synchronously without affecting each other to achieve an increased heat dissipation effect.

[0029] refer to Figure 1 and Figure 3 Specifically, a heat collecting and conducting mechanism 7 is fixedly mounted on the upper surface of the heat conducting plate 6, and the position of the heat collecting and conducting mechanism 7 corresponds to the alarm 11. The heat change of the battery pack 13 can be quickly collected to perform timely heat dissipation and alarm.

[0030] refer to Figure 3 and Figure 4 Specifically, the heat collecting and conductive mechanism 7 includes a shell 704 fixedly connected to the upper wall of the heat conducting plate 6, a heat collecting block 701 is fixedly installed on the bottom of the inner wall of the shell 704, the bottom of the heat collecting block 701 is fixedly connected to the upper wall of the heat conducting plate 6, a sliding plate 702 is slidably connected to the inner wall of the shell 704, and a conductive tube 703 is fixedly connected to the upper end of the sliding plate 702, and a first pair of conductive blocks 705, a second pair of conductive blocks 706, a third pair of conductive blocks 707, and a fourth pair of conductive blocks 708 are arranged on the upper end of the shell 704.

[0031] The heat collected on the heat conducting plate 6 is conducted to the shell 704 through the heat collecting block 701. The mercury between the heat collecting block 701 and the sliding plate 702 is heated and expanded by the increase of heat, and an upward driving force is generated on the sliding plate 702, so that the conductive tube 703 on the sliding plate 702 slides upward on the inner wall of the shell 704. According to the amount of heat collected on the heat conducting plate 6, the mercury is heated and expanded, and the driving force generated is different, and the sliding height of the sliding plate 702 is also different, forming a multi-level driving force (one to four levels). The first pair of conductive blocks 705, the second pair of conductive blocks 706, the third pair of conductive blocks 707, and the fourth pair of conductive blocks 708 can be connected and energized in turn through the conductive tube 703 from bottom to top on the inner wall of the shell 704, and a through hole is opened at the top of the shell 704, which is beneficial to reduce the air resistance when the sliding plate 702 slides upward on the inner wall of the shell 704.

[0032] refer to Figure 4 Specifically, the first pair of conductive blocks 705 and the first fan 8, the second pair of conductive blocks 706 and the second fan 9, the third pair of conductive blocks 707 and the third fan 10, and the fourth pair of conductive blocks 708 and the alarm 11 are all connected in series with a power supply device, and the first fan 8, the second fan 9, the third fan 10, and the alarm 11 are arranged in parallel.

[0033] It should be noted that one side of the conductive block is connected to the first fan 8, the second fan 9, the third fan 10, and the alarm 11, and the other side is connected to an external power supply. When the first pair of conductive blocks 705 is in contact with the first fan 8, the second pair of conductive blocks 706 is in contact with the second fan 9, and the third pair of conductive blocks 707 is in contact with the third fan 10, the step-by-step heat dissipation mechanism is triggered accordingly, and when the fourth pair of conductive blocks 708 is in contact with the alarm 11, the alarm 11 is triggered.

[0034] The working principle of this device is as follows:

[0035] When the temperature of the battery pack 13 in the lower shell 2 is not high enough to trigger the step-by-step heat dissipation mechanism, the battery pack 13 inside the lower shell 2 is naturally cooled by ventilation in which air enters from the top of the upper shell 1 and air exits from the bottom of the lower shell 2. The air inlet 4 installed at the top of the upper shell 1 and the dustproof net 12 installed at the bottom of the lower shell 2 can effectively prevent dust from entering the battery pack and affecting the working efficiency. The support leg 3 supports the lower shell 2 in the air and expands the air intake and heat dissipation.

[0036] When the temperature of the battery pack 13 cannot dissipate heat naturally, the heat on the battery pack 13 is collected by the heat conducting plate 6, and the mercury between the heat collecting block 701 and the sliding plate 702 is expanded by the heat through the heat collecting block 701, and an upward driving force is generated on the sliding plate 702, so that the conductive tube 703 on the sliding plate 702 slides upward on the inner wall of the shell 704. According to the amount of heat collected on the heat conducting plate 6, the driving force generated by the thermal expansion of mercury is different, and the sliding height of the sliding plate 702 is also different, forming a multi-level driving force (one to four levels), which can be connected to the first pair of conductive blocks 705, the second pair of conductive blocks 706, the third pair of conductive blocks 707, and the fourth pair of conductive blocks 708 from bottom to top through the conductive tube 703 on the inner wall of the shell 704 and energize.

[0037] When the heat reaches the first driving force, the conductive tube 703 on the sliding plate 702 slides upward on the inner wall of the shell 704 until it contacts the first pair of conductive blocks 705, triggering power-on to start the first fan 8 to dissipate heat for the battery pack 13. When the first fan 8 cannot dissipate heat for the battery pack 13, the heat continues to rise and reaches the second driving force, the sliding plate 702 slides upward again, and when the conductive tube 703 on the sliding plate 702 contacts the second pair of conductive blocks 706, the second fan 9 is powered on to start the first fan 8 and the second fan 9 dissipates heat for the battery pack 13 at the same time. The first fan 8 and the second fan 9 cannot dissipate heat for the battery pack 13, and the heat continues to rise and reaches the third driving force, the sliding plate 702 slides upward again, and when the conductive tube 703 on the sliding plate 702 contacts the third pair of conductive blocks 707, the third fan 10 is powered on to start the first fan 8, the second fan 9, and the third fan 10 dissipate heat for the battery pack 13 at the same time, so as to achieve the purpose of step-by-step heat dissipation due to the change in battery temperature.

[0038] When the first fan 8 can effectively dissipate the heat of the battery pack 13, the heat dissipated by the battery pack 13 is reduced, and the mercury cannot expand due to the heat. When the sliding plate 702 is pushed upward, the sliding plate 702 slides downward, and the conductive tube 703 on the sliding plate 702 is separated from the contact with the first pair of conductive blocks 705, the power supply to the first fan 8 is stopped, and the second fan 9 and the third fan 10 are the same.

[0039] When the first fan 8, the second fan 9, and the third fan 10 are started simultaneously and cannot dissipate heat for the battery pack 13, the battery pack 13 on the heat conducting plate 6 continues to generate heat, causing the mercury to continue to expand due to the heat. The sliding plate 702 slides upward again. When the conductive tube 703 on the sliding plate 702 contacts the fourth pair of conductive blocks 708, the alarm 11 is energized and triggered. The alarm issued by the alarm 11 can promptly warn the user, so that the battery pack 13 whose temperature cannot be controlled can be quickly handled.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack with a protective casing, characterized in that: The invention comprises an upper shell (1) and a lower shell (2) which are buckled together, the upper end of the upper shell (1) being provided with an air inlet (4), the upper end of the air inlet (4) being fixedly mounted with a dustproof plate (401), the interior of the air inlet (4) being connected with a step-by-step heat dissipation mechanism, the bottom of the inner cavity of the lower shell (2) being fixedly connected with a heat conducting plate (6), the upper surface of the heat conducting plate (6) being fixedly connected with a plurality of battery packs (13), and the bottom of the lower shell (2) being fixedly connected with a support foot (3).

2. A battery pack with a protective casing according to claim 1, characterized in that: The step-by-step heat dissipation mechanism comprises a connecting rod (14) fixedly connected to the lower end of the dustproof plate (401), the outer wall of the connecting rod (14) being rotatably connected to a first fan (8), a second fan (9), and a third fan (10), and the first fan (8), the second fan (9), and the third fan (10) are equidistantly connected.

3. A battery pack with a protective casing according to claim 1, characterized in that: The bottom of the lower shell (2) is evenly provided with a plurality of air outlets (5), and the air outlets (5) are located at the gaps between the battery packs (13), and the inner walls of the air outlets (5) are fixedly connected with dustproof nets (12).

4. A battery pack with a protective casing according to claim 1, characterized in that: A conductive sensing mechanism (7) is fixedly mounted on the upper surface of the heat conducting plate (6), and the position of the conductive sensing mechanism (7) corresponds to the alarm (11).

5. A battery pack with a protective casing according to claim 4, characterized in that: The conductive sensing mechanism (7) comprises a shell (704) fixedly connected to the upper wall of the heat conducting plate (6); a heat collecting block (701) is fixedly connected to the bottom of the inner wall of the shell (704); the bottom of the heat collecting block (701) is fixedly connected to the upper wall of the heat conducting plate (6); a sliding plate (702) is slidably connected to the inner wall of the shell (704); a conductive tube (703) is fixedly connected to the upper end of the sliding plate (702); and a first pair of conductive blocks (705), a second pair of conductive blocks (706), a third pair of conductive blocks (707), and a fourth pair of conductive blocks (708) are arranged at the upper end of the shell (704).

6. A battery pack with a protective casing according to claim 5, characterized in that: The first pair of conductive blocks (705) and the first fan (8), the second pair of conductive blocks (706) and the second fan (9), the third pair of conductive blocks (707) and the third fan (10), and the fourth pair of conductive blocks (708) and the alarm (11) are all connected in series with a power supply device, and the first fan (8), the second fan (9), the third fan (10), and the alarm (11) are arranged in parallel.

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