Composite structure for heat insulation of lithium battery

Abstract

The utility model discloses a composite structure for heat insulation of a lithium battery, which relates to the technical field of lithium batteries and comprises a storage box and a heat insulation component. The storage box is internally provided with uniformly distributed lithium battery cores; the heat insulation assembly comprises a blocking frame, a phenolic foam board, a rock wool board and mica sheets, the blocking frame is fixed to the middle of the blocking frame, an opening is formed in the middle of the blocking frame, the two corresponding mica sheets are fixed in the opening, the phenolic foam board is fixed between the two mica sheets, and the heat conduction assembly is installed on the side face of the blocking frame. A supporting assembly is installed on the side face of the phenolic foam board, heat generated by all the lithium battery cells is blocked by arranging a heat insulation assembly, the supporting assembly comprises fixing frames, first springs and a supporting aluminum board, the two corresponding fixing frames are fixed to the left side and the right side of the phenolic foam board, and heat insulation can be effectively conducted; meanwhile, the lithium battery core can be prevented from being extruded.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a combined structure for heat insulation of lithium batteries. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and uses non-aqueous electrolyte solutions. Lithium batteries have relatively high energy and high storage energy density, which is 6-7 times that of lead-acid batteries. At the same time, lithium batteries have a long service life of more than 6 years.

[0003] In the prior art, when installing a lithium battery pack, multiple lithium battery cells are arranged in parallel and then connected in series or in parallel to form a lithium battery pack. Since the lithium battery cells generate heat during use, a heat insulation structure is set between two adjacent battery cells to isolate the heat generated by the lithium battery to prevent the lithium battery module from self-igniting due to excessive heat. However, as the use cycle of the lithium battery module increases, the lithium battery module will expand during use, resulting in mutual squeezing between the lithium battery modules, which can easily cause damage to the lithium battery pack. For this reason, we propose a combined structure for lithium battery heat insulation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a combined structure for heat insulation of lithium batteries, which can effectively insulate and prevent the lithium battery core from being squeezed, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined structure for heat insulation of lithium batteries, comprising a storage box and a heat insulation component;

[0006] Storage box: evenly distributed lithium battery cells are arranged inside;

[0007] Thermal insulation component: comprises a barrier frame, a phenolic foam board, a rock wool board and a mica sheet, wherein a barrier frame is fixed in the middle of the barrier frame, an opening is opened in the middle of the barrier frame, two corresponding mica sheets are fixed inside the opening, a phenolic foam board is fixed between the two mica sheets, a heat-conducting component is installed on the side of the barrier frame, a supporting component is installed on the side of the phenolic foam board, and the heat generated by each lithium battery cell is blocked by setting the thermal insulation component.

[0008] Furthermore, the support assembly includes a fixed frame, a first spring and a supporting aluminum plate. Two corresponding fixed frames are fixed on the left and right sides of the phenolic foam board. Four corresponding first springs are fixed on the sides of the fixed frames. A supporting aluminum plate is fixed at one end of the four first springs away from the fixed frame. The supporting aluminum plate is in contact with the adjacent lithium battery cell. The support assembly is provided to prevent the lithium battery cell from being squeezed.

[0009] Furthermore, the heat-conducting component includes a heat-conducting aluminum sheet and a heat-conducting aluminum frame, two corresponding heat-conducting aluminum frames are fixed on the side of the barrier frame, two corresponding openings are opened on the left and right sides of the barrier frame, four heat-conducting aluminum sheets are arranged inside the openings, the four heat-conducting aluminum sheets are all fixed inside the heat-conducting aluminum frames adjacent to them, and the other ends of the four heat-conducting aluminum sheets are fixed on the side of the supporting aluminum plate adjacent to them, and the heat generated by the lithium battery cell is conducted by setting the heat-conducting component.

[0010] Furthermore, two corresponding openings are provided on the left and right sides of the storage box, and heat-conducting copper plates are fixed inside the openings, so that heat is conducted to the left and right lithium battery cells by providing the heat-conducting copper plates.

[0011] Furthermore, a slide groove is provided on the side of the heat-conducting copper plate, and a slide plate is slidably connected to the inside of the slide groove. The slide plate fits with the adjacent lithium battery cell. A second spring is fixed to the side of the slide plate, and the second spring is fixed inside the slide groove. The left and right lithium battery cells are supported by setting the slide plate.

[0012] Furthermore, the lower side of the storage box is provided with evenly distributed strip openings, and a thermally conductive copper strip is fixed inside the strip opening. The thermally conductive copper strip fits the lower side of the lithium battery core, and the heat at the bottom of the lithium battery core is conducted by providing the thermally conductive copper strip.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the combined structure for heat insulation of lithium batteries has the following advantages:

[0014] 1. By setting up the heat insulation components, the heat generated by the lithium battery core during use will be blocked by the phenolic foam board, rock wool board and mica sheet. By setting up the supporting aluminum plate, heat-conducting aluminum sheet and heat-conducting aluminum frame, the heat generated by the lithium battery core can be conducted out. In this case, the lithium battery core can be effectively prevented from being damaged by excessive heat;

[0015] 2. By setting up the support assembly, when the lithium battery core expands, the expanded lithium battery core will squeeze the supporting aluminum plate adjacent to it. After squeezing, the supporting aluminum plate will move into the interior of the barrier frame connected to it. In this way, the expansion force generated by the lithium battery core can be absorbed, and after absorption, the expanded lithium battery core can be prevented from being squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the barrier frame of the utility model;

[0017] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0018] Figure 3 This is an enlarged view of point A of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the heat conduction component of the utility model.

[0020] In the figure: 1 storage box, 2 lithium battery core, 3 insulation component, 31 barrier frame, 32 phenolic foam board, 33 rock wool board, 34 mica sheet, 4 support component, 41 fixed frame, 42 first spring, 43 support aluminum plate, 5 heat conduction component, 51 heat conduction aluminum sheet, 52 heat conduction aluminum frame, 6 heat conduction copper plate, 7 slide plate, 8 second spring, 9 heat conduction copper strip. DETAILED DESCRIPTION

[0021] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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] See also Figure 1-4 , This embodiment provides a technical solution: a combined structure for heat insulation of a lithium battery, comprising a storage box 1 and a heat insulation component 3;

[0023] Storage box 1: evenly distributed lithium battery cells 2 are arranged inside;

[0024] The heat insulation component 3 includes a barrier frame 31, a phenolic foam board 32, a rock wool board 33 and a mica sheet 34. The barrier frame 31 is fixed in the middle of the barrier frame 31. An opening is provided in the middle of the barrier frame 31. Two corresponding mica sheets 34 are fixed inside the opening. A phenolic foam board 32 is fixed between the two mica sheets 34. A heat conduction component 5 is installed on the side of the barrier frame 31. A support component 4 is installed on the side of the phenolic foam board 32. The support component 4 includes a fixed frame 41, a first spring 42 and a supporting aluminum plate 43. Two corresponding fixed frames 41 are fixed on the left and right sides of the phenolic foam board 32. Four corresponding first springs 42 are fixed on the side of the fixed frame 41. The four first springs 42 are fixed at one end away from the fixed frame 41. There is a supporting aluminum plate 43, which is fitted with the adjacent lithium battery core 2. The heat-conducting component 5 includes a heat-conducting aluminum sheet 51 and a heat-conducting aluminum frame 52. Two corresponding heat-conducting aluminum frames 52 are fixed on the side of the barrier frame 31. Two corresponding openings are provided on the left and right sides of the barrier frame 31. Four heat-conducting aluminum sheets 51 are arranged inside the openings. The four heat-conducting aluminum sheets 51 are all fixed inside the heat-conducting aluminum frames 52 adjacent to them. The other ends of the four heat-conducting aluminum sheets 51 are fixed on the side of the adjacent supporting aluminum plate 43. The heat generated by the lithium battery core is conducted by arranging the heat-conducting component 5, the extrusion of the lithium battery core is avoided by arranging the supporting component 4, and the heat generated by each lithium battery core 2 is blocked by arranging the heat-insulating component 3.

[0025] There are two corresponding openings on the left and right sides of the storage box 1, and a heat-conducting copper plate 6 is fixed inside the opening. The heat-conducting copper plate 6 is provided to conduct heat to the two lithium battery cells 2 on the left and right.

[0026] Among them: a slide groove is opened on the side of the heat-conducting copper plate 6, and a slide plate 7 is slidably connected inside the slide groove. The slide plate 7 fits with the adjacent lithium battery core 2. A second spring 8 is fixed on the side of the slide plate 7. The second spring 8 is fixed inside the slide groove. The slide plate 7 is provided to support the left and right lithium battery cores 2.

[0027] Among them: the lower side of the storage box 1 is opened with evenly distributed strip openings, and the inside of the strip opening is fixed with a thermal conductive copper strip 9, which fits the lower side of the lithium battery core 2. The heat at the bottom of the lithium battery core 1 is conducted by setting the thermal conductive copper strip 9.

[0028] The working principle of the combined structure for heat insulation of lithium batteries provided by the utility model is as follows: during normal use, the heat generated by the lithium battery core 2 will be conducted to the four heat-conducting aluminum sheets 51 connected thereto through the supporting aluminum plate 43 bonded thereto, and then the heat generated by the lithium battery core 2 can be conducted out through the heat-conducting aluminum frame 52, in this case, the lithium battery core 2 can be effectively prevented from being damaged due to excessive heat, and at the same time, the heat generated by the lithium battery core 2 will be blocked by the phenolic foam board 32, the rock wool board 33 and the mica sheet 34 during use, and after blocking, the temperature inside the storage box 1 can be prevented from being too high, and when the lithium battery core 2 expands, the expanded lithium battery core 2 will squeeze the supporting aluminum plate 43 adjacent to it, and after squeezing, the supporting aluminum plate 43 will move to the inside of the blocking frame 31 connected thereto, in this case, the expansion force generated by the lithium battery core 2 can be absorbed, and after absorption, squeezing of the expanded lithium battery core 2 can be avoided.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lithium battery heat insulation composite structure, characterized in that: It comprises a storage box (1) and a heat insulation component (3); Storage box (1): evenly distributed lithium battery cells (2) are arranged inside; A heat insulation component (3): comprising a barrier frame (31), a phenolic foam board (32), a rock wool board (33) and a mica sheet (34); a barrier frame (31) is fixed in the middle of the barrier frame (31); an opening is provided in the middle of the barrier frame (31); two corresponding mica sheets (34) are fixed inside the opening; a phenolic foam board (32) is fixed between the two mica sheets (34); a heat conduction component (5) is installed on the side of the barrier frame (31); and a support component (4) is installed on the side of the phenolic foam board (32).

2. A lithium battery heat insulation composite structure according to claim 1, characterized in that: The support assembly (4) comprises a fixing frame (41), a first spring (42) and a supporting aluminum plate (43); two corresponding fixing frames (41) are fixed on the left and right sides of the phenolic foam plate (32); four corresponding first springs (42) are fixed on the side faces of the fixing frame (41); a supporting aluminum plate (43) is fixed on one end of the four first springs (42) away from the fixing frame (41); and the supporting aluminum plate (43) is in contact with the adjacent lithium battery core (2).

3. A lithium battery heat insulation composite structure according to claim 2, characterized in that: The heat-conducting component (5) comprises a heat-conducting aluminum sheet (51) and a heat-conducting aluminum frame (52); two corresponding heat-conducting aluminum frames (52) are fixed on the side of the barrier frame (31); two corresponding openings are provided on the left and right sides of the barrier frame (31); four heat-conducting aluminum sheets (51) are arranged inside the openings; the four heat-conducting aluminum sheets (51) are all fixed inside the heat-conducting aluminum frames (52) adjacent thereto; and the other ends of the four heat-conducting aluminum sheets (51) are fixed on the side of the supporting aluminum plate (43) adjacent thereto.

4. The lithium battery heat insulation composite structure according to claim 1, characterized in that: Two corresponding openings are provided on the left and right sides of the storage box (1), and heat-conducting copper plates (6) are fixed inside the openings.

5. A lithium battery heat insulation composite structure according to claim 4, characterized in that: A slide groove is provided on the side of the heat-conducting copper plate (6), a slide plate (7) is slidably connected to the inside of the slide groove, the slide plate (7) fits the adjacent lithium battery core (2), a second spring (8) is fixed on the side of the slide plate (7), and the second spring (8) is fixed inside the slide groove.

6. The lithium battery heat insulation composite structure according to claim 1, characterized in that: The storage box (1) is provided with evenly distributed strip-shaped openings on the lower side thereof, a heat-conducting copper strip (9) is fixed inside the strip-shaped opening, and the heat-conducting copper strip (9) is in contact with the lower side of the lithium battery core (2).

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