Thermal insulation sheet for power battery cell

Abstract

The utility model discloses a heat resisting sheet for a power battery cell, which relates to the technical field of power batteries, and comprises a cell body and a heat resisting sheet body, the heat resisting sheet body is arranged at a gap between two adjacent cell bodies, the heat resisting sheet body is designed to be I-shaped, the two sides of the heat resisting sheet body are respectively provided with a plurality of columns of stabilizing components which are distributed at equal intervals, and the stabilizing components are connected with the heat resisting sheet body. According to the utility model, the position of the heat insulation sheet is easier to adjust in the mounting and using processes, and the heat insulation sheet can adapt to the unevenness of the surface of the battery cell and is kept in a pressed state, so that the heat insulation sheet is ensured to be tightly and stably attached to the battery cell bodies; displacement of the heat insulation sheet under the conditions of vibration, shaking and the like of the battery pack is effectively prevented, and the stability of the heat insulation effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field especially relates to a kind of for power battery cell heat insulation sheet. BACKGROUND

[0002] Electric vehicle power battery mainly uses lithium ion system (positive electrode material) power battery, and battery thermal runaway under extreme conditions is the primary safety problem of electric vehicle, and the common more serious is that battery overcharge leads to temperature too high, causes electric vehicle fire, explosion. Aerogel low thermal conductivity, good heat preservation effect, not burning, compared with traditional thermal insulation material, only 1 / 5-1 / 3 thickness can achieve the same heat preservation effect, application in new energy vehicle can better realize the temperature control and electric control management of battery and improve performance, also save more space for power battery, and heat preservation effect and temperature are more stable, for user and passenger to escape from the scene and put out fire to gain more time.

[0003] At present, the power battery heat insulation sheet in the prior art is generally directly inserted in the gap between two adjacent battery cells, and then the heat insulation sheet is fixed by installing the battery upper cover and the bottom plate. However, due to the gap between the battery cells, the heat insulation sheet cannot be stably fixed therein, and therefore the stability is poor. Therefore, there is an urgent need to design a power battery cell heat insulation sheet to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art, and provides a power battery cell heat insulation sheet. The heat insulation sheet is tightly and stably attached to the battery cell body, effectively prevents displacement of the heat insulation sheet under conditions such as vibration and shaking of the battery pack, and ensures the stability of the heat insulation effect.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A power battery cell heat insulation sheet includes a cell body and a heat insulation sheet body. The heat insulation sheet body is arranged at the gap between two adjacent cell bodies, and the heat insulation sheet body is designed in an I-shaped form. A plurality of stable components are arranged at equal distances on both sides of the heat insulation sheet body, and the stable components are tightly attached to the gap between the two adjacent cell bodies.

[0007] The utility model is further provided with a plurality of side frames arranged at equal distances on both sides of the heat insulation sheet body. The inner wall of the side frame is rotatably connected with a plurality of sliding rollers arranged at equal distances. The sliding rollers are attached to the side wall of the cell body. A plurality of guide columns are fixed to one side of the side frame. A plurality of guide holes are formed in the heat insulation sheet body for the guide columns to pass through. A plurality of compression springs are mounted on the side wall of the heat insulation sheet body on one side of the side frame. The compression springs are sleeved on the outer wall of the guide column.

[0008] The utility model further sets up, the position of side frame located two sides of the heat insulation sheet body is staggered.

[0009] Through the above technical scheme: through the steady component, the whole heat insulation sheet can adapt to the unevenness of the electric core surface and keep the compression state, and the heat insulation sheet and the electric core body are tightly and stably adhered.

[0010] The utility model further sets up, the heat insulation sheet body is composed of the heat insulation sheet middle part located the gap of two adjacent electric core bodies and the heat insulation sheet end part adhered to the outer wall of the two sides of the electric core body, and the heat insulation sheet end part is arranged at one end of the heat insulation sheet middle part respectively, and the heat insulation sheet end part and the heat insulation sheet middle part are in the integrated state.

[0011] Through the above technical scheme: the heat conduction between the electric core bodies is effectively blocked, the possibility of heat diffusion to the surrounding electric core when the electric core thermal runaway is greatly reduced, and the safety of the battery pack is improved.

[0012] The utility model further sets up, the top of heat insulation sheet end part is provided with the compression seat, and the compression seat is made of memory metal material.

[0013] Through the above technical scheme: the compression seat is bent and adhered to the edge of the electric core body, and the installation stability is improved.

[0014] The utility model further sets up, the top middle position of heat insulation sheet middle part is installed with the upper top seat, and the first screw hole is formed in the upper top seat, and is used for installing with the upper cover of the power battery.

[0015] The utility model further sets up, the bottom middle position of heat insulation sheet middle part is installed with the installation shaft, and the outer wall of installation shaft is rotatably connected with the lower base, and the second screw hole is formed in the lower base, and is used for installing with the bottom plate of the power battery.

[0016] Through the above technical scheme: the heat insulation sheet body and the upper cover and the bottom plate of the power battery are conveniently installed and fixed, the installation process is simple and fast, and the whole heat insulation sheet installation is more stable.

[0017] The utility model further sets up, one side of lower base is provided with the limit slot, and the inner wall one side of limit slot is designed as arc surface, and the bottom one side of heat insulation sheet middle part is installed with the limit block, and the limit block adheres to the arc surface of limit slot.

[0018] Through the above technical scheme: the positioning performance of the lower base is formed, and subsequent installation is facilitated.

[0019] The utility model has the advantages of:

[0020] The utility model discloses, the slide roll of stable assembly is pasted with the side wall of electric core, and the slide roll can reduce friction, makes the heat insulating sheet more easily adjust position in the installation and use process, and can adapt to the uneven of electric core surface, and keeps the pressure state, ensures that the heat insulating sheet and electric core body closely and stably paste, effectively prevents the heat insulating sheet from displacement under the condition such as battery pack vibration, shaking, guarantees the stability of heat insulation effect.

[0021] The utility model discloses, the heat insulating sheet body is by the heat insulating sheet middle part of electric core body gap place and the heat insulating sheet end part of pasting in electric core body both sides outer wall is formed, and for the integrated state, can all directions to electric core carry out heat insulation protection, effectively blocks the heat conduction between electric core body, greatly reduced the possibility of heat diffusion to surrounding electric core when electric core thermal runaway, improved the security of battery pack.

[0022] The utility model discloses, through the compression seat of memory metal material quality is made, compresses it on electric core body, and through with the upper top seat of upper cover installation and with the lower base of bottom plate installation, fully guarantee the stable performance of heat insulating sheet body. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A kind of electric core body and heat insulating sheet body structure schematic view for the heat insulating sheet of power battery electric core is proposed for the utility model;

[0024] Figure 2 A kind of heat insulating sheet middle part and heat insulating sheet end part structure schematic view for the heat insulating sheet of power battery electric core is proposed for the utility model;

[0025] Figure 3 A kind of heat insulating sheet body plan view for the heat insulating sheet of power battery electric core is proposed for the utility model;

[0026] Figure 4 A kind of heat insulating sheet body bottom view for the heat insulating sheet of power battery electric core is proposed for the utility model;

[0027] Figure 5 A kind of installation shaft and limit block structure schematic view for the heat insulating sheet of power battery electric core is proposed for the utility model;

[0028] Figure 6 A kind of stable assembly structure schematic view for the heat insulating sheet of power battery electric core is proposed for the utility model;

[0029] Figure 7 A kind of limit slot and second screw hole structure schematic view for the heat insulating sheet of power battery electric core is proposed for the utility model.

[0030] In the figure: 1, the cell body; 2, the heat insulation sheet body; 201, the middle part of the heat insulation sheet; 202, the end part of the heat insulation sheet; 203, the pressing seat; 3, the lower base; 4, the stabilizing assembly; 401, the side frame; 402, the sliding roller; 403, the guide column; 404, the guide hole; 405, the pressing spring; 5, the upper top seat; 6, the first screw hole; 7, the mounting shaft; 8, the limiting block; 9, the limiting groove; 10, the second screw hole. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation to the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0035] REFERENCE Figures 1-7The utility model provides a kind of for power battery cell heat insulation sheet, including cell body 1 and heat insulation sheet body 2, heat insulation sheet body 2 is arranged at the gap of adjacent two cell body 1, and heat insulation sheet body 2 is designed into I-shaped, and both sides of heat insulation sheet body 2 are provided with multiple columns of steady components 4 that are distributed equidistantly, and steady component 4 is tightly attached at the gap of adjacent two cell body 1, and steady component 4 includes multiple columns of side frames 401 that are arranged equidistantly on both sides of heat insulation sheet body 2, and the inner wall of side frame 401 is rotatably connected with equidistantly distributed slide roller 402, and slide roller 402 is attached to the side wall of cell body 1, and one side of side frame 401 is fixed with multiple guide columns 403, guide hole 404 is set on heat insulation sheet body 2 for guide column 403 to pass through, and multiple compression springs 405 are installed on the side wall of heat insulation sheet body 2 on one side of side frame 401 and heat insulation sheet body 2, and compression spring 405 is sleeved on the outer wall of guide column 403, the positions of side frame 401 on both sides of heat insulation sheet body 2 are staggered, the whole heat insulation sheet is adapted to the unevenness of cell surface by steady component 4, and keeps compression state, to ensure that heat insulation sheet and cell body 1 are tightly and stably attached, effectively prevent heat insulation sheet from displacement under the condition such as battery pack vibration, shaking, etc., and guarantee the stability of heat insulation effect.

[0036] To form heat insulation effect, with reference to Figure 1 And Figure 2 Heat insulation sheet body 2 is composed of heat insulation sheet middle part 201 located at the gap of adjacent two cell body 1 and heat insulation sheet end part 202 attached to the outer wall of cell body 1 on both sides, adjacent two heat insulation sheet end part 202 are arranged at one end of heat insulation sheet middle part 201 respectively, heat insulation sheet end part 202 and heat insulation sheet middle part 201 are in integrated state, can heat insulation protection to cell in all directions, effectively block the heat conduction between cell body 1, greatly reduce the possibility of heat spreading to surrounding cell when cell thermal runaway, improve the safety of battery pack.

[0037] To improve the stability effect, with reference to Figure 1 、 Figure 2 、 Figure 3 And Figure 4 The top of heat insulation sheet end part 202 is provided with compression seat 203, and compression seat 203 is made of memory metal material, and compression seat 203 is bent and attached to the edge of cell body 1, to improve installation stability.

[0038] To ensure overall stability, with reference to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 And Figure 7The upper top seat 5 is arranged at the middle top position of the middle part 201 of the heat insulation sheet, and the first screw hole 6 is arranged on the upper top seat 5, which is used for being installed with the upper cover of the power battery; the mounting shaft 7 is arranged at the middle bottom position of the middle part 201 of the heat insulation sheet, and the lower bottom seat 3 is rotatably connected to the outer wall of the mounting shaft 7; the second screw hole 10 is arranged on the lower bottom seat 3, which is used for being installed with the bottom plate of the power battery; the width of the lower bottom seat 3 is less than the gap width of the adjacent two cell bodies 1; the limiting groove 9 is arranged on one side of the lower bottom seat 3, and the inner wall of the limiting groove 9 is designed as an arc surface; the limiting block 8 is arranged at the bottom side of the middle part 201 of the heat insulation sheet, and the limiting block 8 is attached to the arc surface of the limiting groove 9; the first screw hole 6 and the second screw hole 10 can be used to conveniently install and fix the heat insulation sheet body 2 with the upper cover and the bottom plate of the power battery, and the installation process is simple and fast, so that the heat insulation sheet installation is more stable.

[0039] Working principle: the whole heat insulation sheet is inserted at the gap between the adjacent two cell bodies 1, so that the sliding roller 402 is tightly attached to the side wall of the cell body 1, and the stable assembly 4 and the heat insulation sheet body 2 are tightly pressed at the gap of the cell body 1 under the tension of the compression spring 405; then the compression seat 203 made of memory metal material is bent and attached to the edge of the cell body 1, so as to ensure that the heat insulation sheet body 2 is tightly attached to the surface of the cell body 1; the heat insulation sheet body 2 composed of the middle part 201 and the end part 202 of the heat insulation sheet can separate the cell body 1 from the surrounding environment as much as possible; when the cell body 1 generates heat during the charging and discharging process or a certain cell body 1 appears thermal runaway, the heat will try to transfer to the surrounding environment; at this time, the heat insulation sheet body 2 hinders the heat from being transferred from one cell body 1 to the adjacent cell body 1 through heat conduction, so as to reduce the heat diffusion in the battery pack.

[0040] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A thermal barrier sheet for a power battery cell, comprising a cell body (1) and a thermal barrier sheet body (2), characterized in that, The heat insulation sheet body (2) is arranged at the gap between two adjacent battery cell bodies (1), and is designed in an I-shaped form, and a plurality of steady assemblies (4) are arranged at both sides of the heat insulation sheet body (2) in an equidistant manner, and the steady assemblies (4) are tightly arranged at the gap between the two adjacent battery cell bodies (1).

2. The thermal sheet for a power battery cell of claim 1, wherein, The steady assembly (4) comprises a plurality of side frames (401) arranged at both sides of the heat insulation sheet body (2) in an equidistant manner, and the inner wall of the side frame (401) is rotatably connected with equidistantly distributed slide rollers (402) which are tightly arranged on the side wall of the battery cell body (1), a plurality of guide columns (403) are fixed on one side of the side frame (401), guide holes (404) are formed in the heat insulation sheet body (2) for the guide columns (403) to pass through, a plurality of compression springs (405) are arranged on one side of the side frame (401) and the side wall of the heat insulation sheet body (2), and the compression spring (405) is sleeved on the outer wall of the guide column (403).

3. A thermal barrier sheet for a power battery cell according to claim 2, wherein, The positions of the side frames (401) at both sides of the heat insulation sheet body (2) are staggered.

4. The thermal sheet for a power battery cell of claim 1, wherein, The heat insulation sheet body (2) is composed of a heat insulation sheet middle part (201) arranged at the gap between two adjacent battery cell bodies (1) and heat insulation sheet end parts (202) tightly arranged on the side walls of the battery cell bodies (1), and the heat insulation sheet end parts (202) are arranged at one end of the heat insulation sheet middle part (201) respectively, and the heat insulation sheet end part (202) and the heat insulation sheet middle part (201) are in an integral state.

5. A thermal sheet for a power battery cell according to claim 4, wherein, The top of the heat insulation sheet end part (202) is provided with a compression seat (203) made of a memory metal material.

6. A thermal sheet for a power battery cell according to claim 5, wherein, An upper top seat (5) is arranged at the middle position of the top of the heat insulation sheet middle part (201), and a first screw hole (6) is formed in the upper top seat (5) for mounting the upper cover of the power battery.

7. A thermal barrier sheet for a power battery cell according to claim 6, wherein, An installation shaft (7) is arranged at the middle position of the bottom of the heat insulation sheet middle part (201), and a lower bottom seat (3) is rotatably connected with the outer wall of the installation shaft (7), a second screw hole (10) is formed in the lower bottom seat (3) for mounting the bottom plate of the power battery.

8. A thermal sheet for a power battery cell according to claim 7, wherein, A limiting groove (9) is formed in one side of the lower bottom seat (3), and the inner wall of the limiting groove (9) is designed in an arc shape, and a limiting block (8) is arranged at one side of the bottom of the heat insulation sheet middle part (201) and tightly arranged at the arc surface of the limiting groove (9).

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