Aerogel heat insulation plate for automobile battery
By using aerogel heat insulation panels and shape memory alloy guide rods in automotive battery modules, the spacing between cells can be automatically adjusted, solving the problems of rapid heat transfer and cell expansion during thermal runaway, thereby improving safety and extending escape time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-03-13
AI Technical Summary
In the event of thermal runaway, existing automotive battery modules exhibit rapid heat transfer and the expanding cells can puncture aerogel insulation pads, reducing heat transfer efficiency and increasing the overall thermal runaway rate of the battery module, thus endangering passenger cabin safety.
It adopts an aerogel insulation board, which includes an aerogel insulation sheet and a battery pack frame. The battery cells are equipped with movable sliders and movable guide rails. The spacing between the battery cells is automatically adjusted in the event of thermal runaway by using shape memory alloy guide rods. The thermal contraction characteristics of the shape memory alloy guide rods are used to realize the automatic adjustment of the spacing between the battery cells and avoid squeezing adjacent battery cells.
It slows down the rate of heat transfer, reduces the probability of deformation of adjacent cells, increases the time for occupants to escape from the cabin, improves battery safety, and does not require the use of sensors or electric drive components.
Smart Images
Figure CN121663032A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power battery technology, and in particular to an aerogel heat insulation plate for automotive batteries. Background Technology
[0002] Existing automotive battery modules are formed by combining multiple cells in series and parallel. These cells are all lithium battery cells containing electrolyte. If one cell in such a battery module experiences thermal runaway, it will instantly release a large amount of heat, causing a chain reaction and resulting in thermal runaway of the entire battery module. The window of opportunity for people to escape is very short, seriously endangering the safety of passengers in the cabin.
[0003] Although aerogel heat insulation pads are bonded between existing cells to prevent heat transfer between adjacent cells, cells that experience thermal runaway often expand and deform, puncturing the aerogel heat insulation pads. This significantly reduces the effectiveness of preventing heat transfer. Furthermore, because the cells are tightly connected, the heat released instantaneously by a cell that experiences thermal runaway has no room to escape, accelerating the thermal runaway process of the entire battery module.
[0004] In summary, there is an urgent need for an aerogel heat insulation plate for automotive batteries that can keep adjacent cells away from the thermally runaway cell when thermal runaway occurs, delay heat transfer, and prevent the cell from expanding and squeezing adjacent cells. Summary of the Invention
[0005] In view of the heat transfer rate problem of thermal runaway cells in existing technologies, an aerogel heat insulation plate for automotive batteries is proposed, which can move adjacent cells away from the thermal runaway cell when thermal runaway occurs, delay heat transfer, and prevent the cell from expanding and squeezing adjacent cells.
[0006] To solve the above problems, the technical solution of the present invention is as follows: An aerogel heat insulation plate for automotive batteries includes an aerogel heat insulation sheet and a battery pack frame. The battery pack frame is provided with a movable guide rail. The aerogel heat insulation sheet is provided on the side of the battery cell within the battery pack frame. The aerogel heat insulation sheet can isolate heat transfer between adjacent battery cells. A movable slider is provided on each battery cell. The movable slider is adapted to the movable guide rail. There is a gap between adjacent battery cells. The movable slider can drive the battery cell to move along the movable guide rail within the battery pack frame. The battery cell that has not experienced thermal runaway is moved away from the battery cell that has experienced thermal runaway under the drive of the movable slider.
[0007] As a preferred technical solution, each of the movable sliders is connected by a first memory alloy guide rod, which shrinks when heated to reduce the spacing between adjacent cells.
[0008] As a preferred technical solution, the movable slider is provided with a movable clip, which is used to engage with the adjacent first shape memory alloy guide rod; the movable clip is provided with a second shape memory alloy guide rod, which shrinks when heated, causing the movable clip to detach from the first shape memory alloy guide rod, wherein the movable clip is not heat-conducting.
[0009] As a preferred technical solution, the end of the first shape memory alloy guide rod is provided with a snap-fit groove that is adapted to the movable card.
[0010] As a preferred technical solution, the movable slider is provided with a first heat-conducting block and a second heat-conducting block. The first heat-conducting block is used to transfer heat between the battery cell and the first memory alloy conductor, and the second heat-conducting block is used to transfer heat between the battery cell and the second memory alloy conductor. However, heat cannot be transferred between the first heat-conducting block and the second heat-conducting block.
[0011] As a preferred technical solution, the thermal shrinkage temperature of the first alloy guide rod is lower than that of the second shape memory alloy guide rod, and the thermal shrinkage temperature threshold of the second shape memory alloy guide rod is the temperature threshold for thermal runaway of the battery cell.
[0012] As a preferred technical solution, the battery pack frame is provided with several pairs of moving guide rails, and correspondingly, the battery cell is provided with several pairs of moving sliders.
[0013] The beneficial effects of this invention are: 1. The aerogel heat insulation plate for automotive batteries of the present invention includes an aerogel heat insulation sheet and a battery pack frame. The aerogel heat insulation sheet covers the surface of the battery cell and leaves gaps between adjacent battery cells within the battery pack frame, which can further block the transfer of heat. A movable slider adapted to the movable guide rail on the battery pack frame is provided on the battery cell. When the movable slider moves on the movable guide rail, it can change the distance between adjacent battery cells, increasing the distance between the thermal runaway battery cell and the battery cell that has not experienced thermal runaway, thereby further delaying the transfer of heat. At the same time, it provides expansion space for the thermal runaway battery cell, avoiding compression of adjacent battery cells, thereby reducing the probability of deformation of other battery cells, reducing the rate of thermal runaway, and increasing the evacuation time for occupants in the passenger compartment.
[0014] 2. The aerogel heat insulation plate for automotive batteries described in this invention has its moving sliders connected by a first shape memory alloy guide rod. When the battery cell reaches its thermal runaway temperature, the first shape memory alloy guide rod contracts upon heating. A second shape memory alloy guide rod is also provided within the moving slider. The second shape memory alloy guide rod can control the movement of a movable latch, which can control the separation of the first shape memory alloy guide rod from the moving slider. Under the influence of the thermal runaway battery cell temperature, the second shape memory alloy guide rod contracts, ultimately causing the corresponding first shape memory alloy guide rod to separate from the moving slider. Therefore, the position of the thermally runaway battery cell remains unchanged, while the cells without thermal runaway move closer together, transforming the small gap between healthy cells into a large gap between thermally runaway cells. This allows for automated adjustment of the cell spacing without the need for sensors or power drive components, thereby increasing the system's reliability. Attached Figure Description
[0015] Figure 1 This is a three-dimensional schematic diagram of the aerogel heat insulation plate and battery cell for automotive batteries described in this invention; Figure 2 This is a partial cross-sectional schematic diagram of the aerogel heat insulation plate and battery cell for automotive batteries described in this invention; Figure 3 This is a schematic diagram of the moving guide rail of the aerogel heat insulation plate for automotive batteries described in this invention. Figure 1 ; Figure 4 This is a schematic diagram of the moving guide rail of the aerogel heat insulation plate for automotive batteries described in this invention. Figure 2 ; Figure 5 A three-dimensional schematic diagram of the first shape memory alloy guide rod; Figure 6 A schematic diagram of the aerogel heat insulation plate and battery cell for the automotive battery in a thermal runaway separation state; Figure 7 A schematic diagram of the first shape memory alloy guide rod in its contracted state.
[0016] The reference numerals and components involved in the accompanying drawings are shown below: 1. Aerogel heat insulation sheet; 2. Battery pack frame; 3. Battery cell; 4. Moving slider; 5. First shape memory alloy guide rod; 6. Second shape memory alloy guide rod; 11. Protrusion; 21. Moving guide rail; 41. First heat conduction block; 42. Second heat conduction block; 43. Joining compartment; 44. Movable clip; 51. Clip groove; 411. Cylindrical hole. Detailed Implementation
[0017] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] To better understand the aerogel heat insulation plate for automotive batteries provided in this embodiment, a brief introduction to existing aerogel heat insulation components is given below. For example, Chinese patent application No. 2025109066750 discloses an aerogel heat insulation pad for power batteries, including a first heat-conducting plate and a second heat-conducting plate. The first heat-conducting plate includes a first outer horizontal portion, a first vertical portion, and a first inner horizontal portion; the second heat-conducting plate includes a second outer horizontal portion, a second vertical portion, and a second inner horizontal portion; it also includes a first heat-receiving cutting mechanism and a second heat-receiving cutting mechanism. This patent solution, by setting the first heat-receiving cutting mechanism and the second heat-receiving cutting mechanism, when the power battery experiences thermal runaway, the first heat-receiving cutting mechanism cuts off the first outer horizontal portion from the first vertical portion and the second outer horizontal portion from the second vertical portion, and the second heat-receiving cutting mechanism cuts off the first outer horizontal portion from the first middle heat-conducting portion and the second outer horizontal portion from the second middle heat-conducting portion, thereby preventing the heat of the power battery from being conducted to the upper and lower liquid cooling plates. It can only reduce the contact between the battery cell and the liquid cooling plate, but it cannot change the position between the battery cells or delay the heat transfer between adjacent cells. Moreover, after the contact with the liquid cooling plate is broken, heat accumulates further, which actually enhances the impact on adjacent cells. Therefore, to solve the above problems, the present invention proposes the following aerogel heat insulation plate for automotive batteries: Please see the appendix Figure 1 Appendix Figure 2 , Figure 1 This is a three-dimensional schematic diagram of the aerogel heat insulation plate and battery cell for automotive batteries described in this invention; Figure 2This is a partial cross-sectional view of the aerogel heat insulation board and battery cell for automotive batteries according to the present invention. An aerogel heat insulation board for automotive batteries includes an aerogel heat insulation sheet 1 and a battery pack frame 2. In this embodiment, the battery pack frame 2 is a vertically continuous cuboid structure, with at least one set of moving guide rails 21 on each of its two long sides. The moving guide rails 21 are sliding groove structures penetrating the side walls of the battery pack frame 2. A plurality of square battery cells 3 are arranged inside the battery pack frame 2, with the narrow side of the square battery cell 3 intersecting the long side of the battery pack frame 2. Correspondingly, an aerogel heat insulation sheet 1 is provided between adjacent battery cells 3. Preferably, an aerogel heat insulation sheet 1 is attached to the side of each battery cell 3, that is, two aerogel heat insulation sheets 1 are provided between two battery cells 3, and a gap is reserved between two adjacent aerogel heat insulation sheets 1 in the installed car battery. A movable slider 4 adapted to the movable guide rail 21 is provided on the narrow side of the battery cell 3. The movable slider 4 can drive the corresponding battery cell 3 to move along the movable guide rail 21. The movement of the battery cell 3 can change the distance between adjacent battery cells 3. Regarding the spacing, when a cell 3 in the automotive battery pack experiences thermal runaway, the adjacent cells 3 on either side move away from the thermally runaway cell 3 under the influence of the moving slider 4. This creates a larger gap between the thermally runaway cell 3 and the cells on either side. Therefore, even if the thermally runaway cell 3 expands, it cannot compress the adjacent cells 3, and the heat from the thermally runaway cell 3 dissipates into the expanded gap, further slowing down heat transfer. It should be understood that because the cell 3 can move within the battery pack frame 2... When cell 3 experiences thermal runaway, the movement of cell 3 can bring the cells 3 that have not experienced thermal runaway into close contact, transferring the gap space between the cells 3 that have not experienced thermal runaway to both sides of the thermally runaway cell 3. This allows the aerogel heat insulation plate for automotive batteries described in this invention to promptly delay or prevent heat transfer between the runaway cell 3 and the non-runaway cell 3 in the event of thermal runaway, and also minimizes the possibility of a significant reduction in the battery capacity of the battery module due to an excessively large gap between the two cells 3 in the initial state.
[0019] Please refer to the appendix again. Figure 2 Specifically, in some preferred embodiments, the aerogel heat insulation sheet 1 is also attached to the narrow side of the battery cell 3, that is, an aerogel heat insulation sheet 1 is provided between the battery cell 3 and the long side of the battery pack frame 2, which can further isolate the heat transfer between the battery packs; the aerogel heat insulation sheet 1 is bonded to the side of the battery cell 3, and the aerogel heat insulation sheet 1 adjacent to the moving guide rail 21 is provided with a protrusion 11 adapted to the moving guide rail 21. The moving slider 4 is wrapped and fixed inside the protrusion 11. Please refer to the appendix. Figure 3 Appendix Figure 4 , Figure 3 This is a schematic diagram of the moving guide rail of the aerogel heat insulation plate for automotive batteries described in this invention. Figure 1 , Figure 4This is a schematic diagram of the moving guide rail of the aerogel heat insulation plate for automotive batteries described in this invention. Figure 2 The movable slider 4 contains a first heat-conducting block 41, a second heat-conducting block 42, and a bonding chamber 43. The first heat-conducting block 41 and the second heat-conducting block 42 are made of heat-conducting materials such as copper or iron. The first heat-conducting block 41 and the second heat-conducting block 42 are respectively positioned at different locations on the movable slider 4. Heat is not transferred from the first heat-conducting block 41 to the second heat-conducting block 42, nor from the second heat-conducting block 42 to the first heat-conducting block 41. Two sets of the first heat-conducting blocks 41 are symmetrically distributed on both sides of the bonding chamber 43. The first heat-conducting block 41 has a cylindrical hole 411 for the first shape memory alloy guide rod 5 to pass through. The first shape memory alloy guide rod 5 can slide along the cylindrical hole 411 and maintain a tight fit with the first heat-conducting block 41. At least a portion of the first heat-conducting block 41 is in direct contact with the battery cell 3. The two ends of the first shape memory alloy guide rod 5 are located in the bonding chambers 43 of adjacent movable sliders 4. (See attached diagram.) Figure 5 , Figure 5 This is a three-dimensional schematic diagram of the first shape memory alloy guide rod 5. At both ends of the first shape memory alloy guide rod 5, there are snap-fit grooves 51. When heated, the first shape memory alloy guide rod 5 in its middle section, i.e., the area between adjacent movable sliders 4, undergoes a spiral deformation, generating a traction force on the battery cells 3 on both sides, thus reducing the distance between adjacent battery cells 3. Within the coupling chamber 43, the ends of two adjacent first shape memory alloy guide rods 5 are tightly fitted together, and a non-thermally conductive movable clip 44 is provided inside. The movable clip 44 simultaneously engages within the snap-fit grooves 51 at the ends of the two shape memory alloy guide rods. Preferably, the movable clip 44... The bottom can also be inserted into the bottom of the junction chamber 43, making the first memory alloy guide rod 5, the movable card 44, and the movable slider 4 a whole. Under the action of traction force, the whole can move along the movable guide rail 21. The top of the movable card 44 is provided with a second memory alloy guide rod 6. The other end of the second memory alloy guide rod 6 is connected to the second heat-conducting block 42. At least a part of the second heat-conducting block 42 is also directly attached to the battery cell 3. When the second memory alloy guide rod 6 is heated, it will also twist spirally, thereby generating an upward pulling force on the movable card 44 below, causing the movable card 44 to detach from the first memory alloy guide rod 5. It should be understood that the positions of the battery cells 3 close to both ends of the battery pack frame 2 remain fixed, and the two outermost first alloy memory guide rods are also fixedly connected to the battery pack frame 2.
[0020] The aerogel heat insulation plate for automotive batteries described in this invention is used as follows: In the initial state, each battery cell 3 within the battery pack frame 2 is evenly distributed within it. The battery cells 3 at both ends and the aerogel heat insulation sheet 1 attached to the battery cells 3 are fixed to both ends of the battery pack frame 2. Adjacent battery cells 3 are spaced at equal intervals. First shape memory alloy guide rods 5 are connected to the sliding sliders 4 on both sides of the battery cells 3, and the first shape memory alloy guide rods 5 remain straight, providing support for adjacent battery cells 3 and preventing them from sliding freely. Please refer to the appendix. Figure 6 Appendix Figure 7 , Figure 6 This is a schematic diagram of the aerogel heat insulation plate and battery cell for the automotive battery in a thermal runaway separation state. Figure 7 This is a schematic diagram of the first shape memory alloy guide rod in its contracted state. When one of the cells 3 within the battery pack frame 2 experiences thermal runaway, the temperature of that cell 3 begins to rise. This temperature is transferred in real-time from the first heat-conducting block 41 to the first shape memory alloy guide rod 5, and from the second heat-conducting block 42 to the second shape memory alloy guide rod 6. When the temperature threshold exceeds the upper limit of the normal temperature, and a thermal runaway temperature occurs, the deformation temperatures of both the first and second shape memory alloy guide rods 5 and 6 are simultaneously reached. Please refer again to the attached diagram. Figure 4 ( Figure 4 The relative positions are shown, but the spiral contraction state of the second shape memory alloy guide rod is not shown. The deformation of the second shape memory alloy guide rod 6 causes the movable clip 44 to move upward, allowing the two first shape memory alloy guide rods 5 engaged by the movable clip 44 to move freely. The first shape memory alloy guide rods 5 also transfer the high temperature transmitted through the first heat-conducting block 41 to each other, causing the first shape memory alloy guide rods 5 to begin to contract. At this time, since the movable clip 44 on the cell 3 without thermal runaway is still engaged with the end of the first shape memory alloy guide rod 5, under the fixed position of the end of the cell 3 and the contraction pull of the first shape memory alloy guide rod 5, the cells 3 without thermal runaway move along the moving guide rail. 21 moves towards both ends of the battery pack frame 2. The cell 3 in thermal runaway state has its internal movable card 44 detached from the first shape memory alloy guide rod 5. As a result, the first shape memory alloy guide rod 5 slides relative to the cylindrical hole 411 of the first heat-conducting block 41 under the pulling action. Therefore, it does not move the thermal runaway cell 3 synchronously. As a result, the cells 3 on both sides of the cell 3 gradually move away from each other. The small gap between each cell 3 is transformed into a large gap between the cell 3 without thermal runaway and the cell 3 that has thermal runaway. This achieves automatic isolation of the thermal runaway cell 3, which greatly slows down the speed and efficiency of heat transfer, increases the escape time of the occupants, and improves the safety of the battery.
[0021] In the above embodiments, after the movable card 44 detaches from the first memory alloy guide rod 5, since the first heat-conducting block 41 and its cylindrical hole 411 have a certain size, the two first memory alloy guide rods 5 in the coupling chamber 43 can still receive heat from the thermal runaway battery cell 3 after separation and before leaving the corresponding first heat-conducting block 41, causing the other first memory alloy guide rods 5 to continue to deform. In some preferred embodiments, the deformation temperature of the second memory alloy guide rod 6 is higher than that of the first memory alloy guide rod 5, and the deformation threshold of the second memory alloy guide rod 6 is closer to the thermal runaway threshold temperature of the battery cell 3 than the deformation threshold of the first memory alloy guide rod 5. This makes the first memory alloy guide rod 5 have a tendency to deform before the second memory alloy guide rod 6 deforms. At this time, after the second memory alloy drives the movable card 44 to move, the first memory alloy guide rod 5 can accelerate away from the thermal runaway battery cell 3. It should be understood that when the temperature of the battery cell 3 is higher than the deformation temperature of the first memory alloy guide rod 5 but lower than the deformation temperature of the second memory alloy guide rod 6, the first memory alloy guide rod 5 is in a pre-tightened state of mutual tension, and its relative position will not change.
[0022] The aerogel heat insulation plate for automotive batteries of the present invention includes an aerogel heat insulation sheet 1 and a battery pack frame 2. The aerogel heat insulation sheet 1 covers the surface of the battery cell 3, and gaps are left between adjacent battery cells 3 within the battery pack frame 2 to further block heat transfer. A sliding block 4 is provided on the battery cell 3, which is adapted to a moving guide rail 21 on the battery pack frame 2. When the sliding block 4 moves on the moving guide rail 21, it can change the distance between adjacent battery cells 3, increasing the distance between the thermally runaway battery cell 3 and the battery cell 3 that has not experienced thermal runaway, thereby further delaying and hindering heat transfer. Simultaneously, it provides expansion space for the thermally runaway battery cell 3, avoiding compression of adjacent battery cells 3, thereby reducing the probability of deformation of other battery cells 3, reducing the rate of thermal runaway, and increasing the evacuation time for occupants. The sliding block 4... The cells 3 are connected by a first shape memory alloy guide rod 5. After the cell 3 reaches the thermal runaway temperature, the first shape memory alloy guide rod 5 will automatically contract upon heating. The movable slider 4 also contains a second shape memory alloy guide rod 6, which can control the movement of the movable card 44. The movable card 44 can control the separation of the first shape memory alloy guide rod 5 from the movable slider 4. Under the influence of the thermal runaway temperature of the cell 3, the second shape memory alloy guide rod 6 contracts, eventually causing the corresponding first shape memory alloy guide rod 5 to separate from the movable slider 4. Therefore, the position of the cell 3 that has experienced thermal runaway remains unchanged, while the cells 3 that have not experienced thermal runaway move closer together, transforming the small gap between healthy cells 3 into a large gap between thermally runaway cells 3. The automatic adjustment of the gap between cells 3 can be achieved without the need for sensors or power drive components, thereby increasing the reliability of the system.
[0023] It should be noted that the automotive battery module using the aerogel heat insulation plate for automotive batteries described in this invention can also have a liquid cooling temperature control system arranged at its bottom. Sufficient wire length can be reserved in the series connection between the battery cells 3 to avoid the wires affecting the distance between the battery cells 3. Preferably, the pulling force on the moving slider 4 can be increased to break the wire connection between the battery cell 3 and the thermally runaway battery cell 3 when the battery cell 3 moves. Specifically, the strength of the first shape memory alloy guide rod 5 can be increased, and 3, 4, or more pairs of moving guide rails 21 and corresponding moving sliders 4 can be set on the battery pack frame 2, i.e., by increasing the strength of the first shape memory alloy guide rod 5. The number of rods 5 increases the traction force when the battery cell 3 moves, and at the same time improves the fault tolerance redundancy of the aerogel heat insulation plate for automotive batteries described in this invention. In some preferred embodiments, other traction mechanisms can also be set, such as temperature sensors powered by independent power supplies and micro motor control. That is, each battery cell 3 is equipped with an independent temperature sensor and a motor is set in the moving slider 4. The motor and the moving guide rail 21 are meshed in a gear and rack pattern. The rotation of the motor drives the movement of the battery cell 3. When the temperature sensor on a certain battery cell 3 detects the thermal runaway temperature, the motors on other battery cells 3 are started and rotated away from the runaway battery cell 3.
[0024] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and additions without departing from the principle of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention.
Claims
1. An aerogel heat insulation panel for automotive batteries, comprising an aerogel heat insulation sheet and a battery pack frame, characterized in that, The battery pack frame is equipped with a movable guide rail, and the sides of the battery cells within the battery pack frame are provided with aerogel heat insulation sheets, which can isolate heat transfer between adjacent battery cells. Each battery cell is equipped with a movable slider, which is adapted to the movable guide rail. There is a gap between adjacent battery cells, and the movable slider can drive the battery cells to move along the movable guide rail within the battery pack frame. Among them, the battery cells that have not experienced thermal runaway are moved away from the battery cells that have experienced thermal runaway under the drive of the movable slider.
2. The aerogel heat insulation board for automotive batteries according to claim 1, characterized in that, Each of the movable sliders is connected by a first shape memory alloy guide rod, which shrinks when heated to reduce the spacing between adjacent cells.
3. The aerogel heat insulation panel for automotive batteries according to claim 2, characterized in that, The movable slider is provided with a movable clip, which is used to engage with the adjacent first shape memory alloy guide rod; the movable clip is provided with a second shape memory alloy guide rod, which shrinks when heated, causing the movable clip to detach from the first shape memory alloy guide rod, wherein the movable clip is not heat-conducting.
4. The aerogel heat insulation panel for automotive batteries according to claim 3, characterized in that, The end of the first shape memory alloy guide rod is provided with a snap-fit groove that is adapted to the movable card.
5. The aerogel heat insulation panel for automotive batteries according to claim 3, characterized in that, The movable slider is provided with a first heat-conducting block and a second heat-conducting block. The first heat-conducting block is used to transfer heat between the battery cell and the first memory alloy conductor rod, and the second heat-conducting block is used to transfer heat between the battery cell and the second memory alloy conductor rod. However, heat cannot be transferred between the first heat-conducting block and the second heat-conducting block.
6. The aerogel heat insulation panel for automotive batteries according to claim 3, characterized in that, The thermal shrinkage temperature of the first alloy guide rod is lower than that of the second shape memory alloy guide rod, and the thermal shrinkage temperature threshold of the second shape memory alloy guide rod is the temperature threshold for thermal runaway of the battery cell.
7. The aerogel heat insulation panel for automotive batteries according to any one of claims 1-6, characterized in that, The battery pack frame is provided with several pairs of movable guide rails, and correspondingly, the battery cell is provided with several pairs of movable sliders.