Thermal insulation device for lithium battery pack

Abstract

The utility model relates to the technical field of heat preservation of storage batteries, and discloses a heat preservation device for a lithium battery pack, which solves the problems in the background technology and comprises a shell, a cavity is arranged in the shell, partition plates are arranged in the cavity and divide the inner cavity of the shell into an upper sub-cavity and a lower sub-cavity, and the upper sub-cavity is communicated with the lower sub-cavity. Two folding heat preservation mechanisms are mounted in the cavity, a mounting plate is arranged between the two folding heat preservation mechanisms, the mounting plate is fixedly mounted on the upper wall of the partition plate, the mounting plate is used for mounting a storage battery, a heating pipe is arranged in the lower sub-cavity, a temperature sensor is arranged in the upper sub-cavity, and the heating pipe is used for heating the storage battery. The folding heat preservation mechanism comprises a driving motor, a threaded rod and a folding heat preservation layer, and has the advantages that the heat preservation effect of the interior of the shell can be automatically controlled through the folding heat preservation mechanism, so that the situation that use is affected due to the fact that the temperature of the lithium storage battery is too low is prevented, and the service life of the storage battery can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery heat preservation, in particular to a heat preservation device for a lithium battery pack. Background Art

[0002] Batteries are widely used in various devices and systems, including electric vehicles, portable electronic devices, solar power generation systems, wireless communication equipment, etc. In cold environments, the performance of lithium batteries may be affected, so measures need to be taken to keep lithium batteries warm in some applications.

[0003] The current thermal insulation device generally fills the thermal insulation material between the shell and the battery, which has poor heat dissipation effect. When the ambient temperature is high, it will affect the use of the battery and reduce the life of the battery. Therefore, we propose a thermal insulation device for lithium battery packs. Utility Model Content

[0004] In order to solve the problem that the current heat preservation device generally fixes and fills heat preservation materials between the shell and the battery, which has poor heat dissipation effect, affects the use of the battery and reduces the life of the battery when the ambient temperature is high, the utility model provides the following technical solutions: a heat preservation device for a lithium battery pack, comprising a shell, a cavity is provided in the shell, a partition plate is provided in the cavity, the partition plate is arranged in parallel to divide the shell cavity into an upper cavity and a lower cavity, a folding heat preservation mechanism is installed in the cavity, there are two folding heat preservation mechanisms, a mounting plate is provided between the two folding heat preservation mechanisms, the The mounting plate is fixedly mounted on the upper wall of the partition plate, and the mounting plate is used to mount the battery. A heating tube is arranged in the lower chamber, and a temperature sensor is arranged in the upper chamber. The folding and heat-insulating mechanism comprises a driving motor, a threaded rod and a folding and heat-insulating layer. The driving motor is fixedly mounted in the lower chamber, and the output end of the driving motor passes upward through the partition plate and is fixedly connected to the lower end of the threaded rod. The top end of the threaded rod is rotatably connected to the top of the upper chamber through a bearing, and the folding and heat-insulating layer is sleeved on the threaded rod. The rotation of the threaded rod can drive the folding and heat-insulating layer to unfold / fold.

[0005] Preferably, the upper sub-chamber is provided with a slide groove, the slide grooves are arranged in pairs, the slide grooves are slidably connected to the side edges of the foldable thermal insulation layer, and the foldable thermal insulation layer can be folded / unfolded along the slide grooves.

[0006] Preferably, the threaded rod includes a smooth portion at the bottom and a threaded portion at the top, and the folding insulation layer is divided into an upper fixed end and a lower movable end, the fixed end is rotatably sleeved on the smooth portion, a limiting ring is provided on the smooth portion, the limiting ring is located above the fixed end, the limiting ring can prevent the fixed end from moving up and down, the movable end is threadably connected to the threaded portion, and the rotation of the threaded rod can drive the movable end to rise and fall, thereby driving the folding insulation layer to unfold / fold.

[0007] Preferably, a side wall of the shell is provided with a heat dissipation hole, and the heat dissipation hole and the folded thermal insulation layer are arranged on the same side.

[0008] Preferably, the area of ​​the folded thermal insulation layer after being unfolded is larger than the side wall of the upper chamber and can cover the heat dissipation holes.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The temperature data in the upper chamber is obtained through the temperature sensor. If the temperature is high, the drive motor will be automatically started. The rotation of the drive motor through the threaded rod will drive the folded insulation layer to fold down along the slide groove, leaking out the heat dissipation holes, and the heat in the upper chamber will be dissipated through the heat dissipation holes. If the temperature in the upper chamber is too low, the drive motor will be automatically started. The drive motor will rotate in the opposite direction to drive the folded insulation layer to rise and spread out, covering the heat dissipation holes. At the same time, the heating tube will start to heat the shell, thereby achieving the effect of automatic insulation / heat dissipation of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the front section structure of the utility model as a whole;

[0014] Figure 3 It is a schematic diagram of the side section structure of the utility model as a whole;

[0015] In the figure: 1. Shell; 2. Partition plate; 3. Upper chamber; 4. Lower chamber; 5. Mounting plate; 6. Heating tube; 7. Driving motor; 8. Threaded rod; 9. Folding insulation layer; 10. Slide groove; 11. Limiting ring; 12. Heat dissipation hole. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0017] Depend on Figure 1-3 The utility model includes a shell 1, a cavity is provided in the shell 1, a partition plate 2 is provided in the cavity, the partition plate 2 is arranged in parallel to divide the inner cavity of the shell 1 into an upper chamber 3 and a lower chamber 4, a folding insulation mechanism is installed in the cavity, there are two folding insulation mechanisms, a mounting plate 5 is provided between the two folding insulation mechanisms, the mounting plate 5 is fixedly installed on the upper wall of the partition plate 2, the mounting plate 5 is used to install a battery, a heating tube 6 is provided in the lower chamber 4, a temperature sensor is provided in the upper chamber 3, the folding insulation mechanism includes a driving motor 7, a threaded rod 8 and a folding insulation layer 9, the driving motor 7 is fixedly installed in the lower chamber 4, the output end of the driving motor 7 passes through the partition plate 2 upward and is fixedly connected to the lower end of the threaded rod 8, the top end of the threaded rod 8 is rotatably connected to the top of the upper chamber 3 through a bearing, a folding insulation layer 9 is sleeved on the threaded rod 8, and the rotation of the threaded rod 8 can drive the folding insulation layer 9 to unfold / fold.

[0018] The upper sub-chamber 3 is provided with a slide groove 10 , which is arranged in pairs. The slide groove 10 is slidably connected to the side of the foldable thermal insulation layer 9 , and the foldable thermal insulation layer 9 can be folded / unfolded along the slide groove 10 .

[0019] The threaded rod 8 includes a smooth portion at the bottom and a threaded portion at the top. The folding insulation layer 9 is divided into an upper fixed end and a lower movable end. The fixed end is rotatably sleeved on the smooth portion. A limit ring 11 is arranged on the smooth portion. The limit ring 11 is located above the fixed end. The limit ring 11 can prevent the fixed end from moving up and down. The movable end is threadably connected to the threaded portion. The rotation of the threaded rod 8 can drive the movable end to rise and fall, thereby driving the folding insulation layer 9 to unfold / fold.

[0020] The side wall of the housing 1 is provided with a heat dissipation hole 12 , and the heat dissipation hole 12 and the folded heat-insulating layer 9 are arranged on the same side.

[0021] The area of ​​the folded heat-insulating layer 9 after being unfolded is larger than the side wall of the upper chamber 3 and can cover the heat dissipation holes 12 .

[0022] Working principle: When working, the battery will generate heat, and the temperature data in the upper chamber 3 will be obtained through the temperature sensor. If the temperature is high, the drive motor 7 will be automatically started. The rotation of the drive motor 7 through the threaded rod 8 will drive the folded insulation layer 9 to descend and fold along the slide groove 10, leaking out of the heat dissipation hole 12, and the heat in the upper chamber 3 will be dissipated through the heat dissipation hole 12. If the temperature in the upper chamber 3 is too low, the drive motor 7 will be automatically started. The rotation of the drive motor 7 in the opposite direction will drive the folded insulation layer 9 to rise and spread out, covering the heat dissipation hole 12. At the same time, the heating tube 6 starts to heat the shell 1, thereby achieving the effect of automatic insulation / heat dissipation of the battery.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat preservation device for a lithium battery pack, comprising a housing (1), characterized in that: The shell (1) is provided with a cavity, a partition plate (2) is provided in the cavity, the partition plate (2) is arranged in parallel to divide the inner cavity of the shell (1) into an upper chamber (3) and a lower chamber (4), a folding heat-insulating mechanism is installed in the cavity, there are two folding heat-insulating mechanisms, a mounting plate (5) is provided between the two folding heat-insulating mechanisms, the mounting plate (5) is fixedly mounted on the upper wall of the partition plate (2), the mounting plate (5) is used to install a storage battery, a heating tube (6) is provided in the lower chamber (4), and a temperature sensor is provided in the upper chamber (3); The folding and heat-insulating mechanism comprises a driving motor (7), a threaded rod (8) and a folding and heat-insulating layer (9); the driving motor (7) is fixedly installed in the lower chamber (4); the output end of the driving motor (7) passes upward through the partition plate (2) and is fixedly connected to the lower end of the threaded rod (8); the top end of the threaded rod (8) is rotatably connected to the top of the upper chamber (3) via a bearing; the folding and heat-insulating layer (9) is sleeved on the threaded rod (8); the rotation of the threaded rod (8) can drive the folding and heat-insulating layer (9) to unfold / fold.

2. A heat preservation device for a lithium battery pack according to claim 1, characterized in that: The upper sub-chamber (3) is provided with a slide groove (10), the slide grooves (10) are arranged in pairs, the slide grooves (10) are slidably connected to the side of the folding insulation layer (9), and the folding insulation layer (9) can be folded / unfolded along the slide grooves (10).

3. A heat preservation device for a lithium battery pack according to claim 2, characterized in that: The threaded rod (8) comprises a smooth portion at the bottom and a threaded portion at the top. The folding thermal insulation layer (9) comprises a fixed end at the top and a movable end at the bottom. The fixed end is rotatably sleeved on the smooth portion. A limit ring (11) is provided on the smooth portion. The limit ring (11) is located above the fixed end. The limit ring (11) can prevent the fixed end from moving up and down. The movable end is threadedly connected to the threaded portion. The rotation of the threaded rod (8) can drive the movable end to rise and fall, thereby driving the folding thermal insulation layer (9) to unfold / fold.

4. A heat preservation device for a lithium battery pack according to claim 3, characterized in that: A heat dissipation hole (12) is provided on the side wall of the shell (1), and the heat dissipation hole (12) and the folded heat-insulating layer (9) are arranged on the same side.

5. A heat preservation device for a lithium battery pack according to claim 4, characterized in that: When the folded heat-insulating layer (9) is unfolded, its area is larger than the side wall of the upper chamber (3), and is capable of covering the heat dissipation hole (12).

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