A new energy air conditioner thermal management device of multi-medium cooling

Abstract

The application discloses a new energy air conditioner thermal management device of multi-medium cooling, and relates to the technical field of new energy automobile power battery thermal management, which comprises a battery box, a plurality of groups of battery cells are arranged in the battery box, and a thermal response switching partition plate is arranged between two adjacent groups of battery cells; a heat insulation medium storage cavity, a working cavity and a heat conduction enhancement cavity are arranged in the thermal response switching partition plate, the heat insulation medium storage cavity is filled with heat insulation medium, the working cavity is filled with heat conduction medium, and a middle piston plate is slidably arranged in the working cavity; a locking pin, a locking groove, a memory alloy wire and a first spring are arranged on the thermal response switching partition plate, the locking pin is driven to be separated from the locking groove after the memory alloy wire is heated and shrunk, the first spring drives the middle piston plate to move, the heat conduction medium enters the heat conduction enhancement cavity, and the heat insulation medium enters the working cavity. The application can realize the automatic switching of the heat conduction medium and the heat insulation medium according to the temperature change of the battery cell, and cooperate with a liquid cooling heat exchange plate to perform thermal management.

Description

Technical Field

[0001] This invention relates to the field of power battery thermal management technology, and in particular to a new energy air conditioning thermal management device with multi-medium cooling. Background Technology

[0002] With the rapid development of the new energy vehicle industry, power battery systems are gradually moving towards higher energy density, higher charge / discharge rates, and larger capacities. Power batteries continuously generate heat during charging and discharging, especially under fast charging, high-load operation, and high-temperature environments, where heat accumulation inside the battery becomes more pronounced. Therefore, power battery thermal management technology has become a crucial factor affecting the safety, lifespan, and operational performance of new energy vehicles.

[0003] Currently, most power battery thermal management systems employ liquid cooling for heat dissipation. A liquid cooling structure located at the bottom of the battery cell removes the heat generated by the cell, ensuring the battery system operates within a suitable temperature range. Simultaneously, to reduce temperature differences between cells within the battery module, thermally conductive structures are typically used to promote heat transfer between adjacent cells, thereby improving the overall temperature uniformity of the battery module.

[0004] However, when individual cells experience sustained temperature increases due to internal short circuits, overcharging, mechanical damage, or other abnormal factors, existing thermal conductivity structures, while promoting temperature uniformity, can also easily become heat transfer channels, causing the heat generated by the abnormal cell to spread to surrounding cells, thereby increasing the risk of thermal runaway propagation. While using fixed thermal insulation structures can reduce the speed of heat transfer, it affects the temperature uniformity between cells under normal operating conditions, making it difficult to simultaneously meet the requirements of uniform temperature conduction and prevention of thermal runaway propagation.

[0005] Therefore, how to provide a new energy air conditioning thermal management device that can achieve uniform temperature conduction of the battery cell under normal operating conditions, automatically switch to thermal insulation state under abnormal operating conditions, and guide heat to be concentratedly transferred to the cooling structure to enhance heat dissipation has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of this invention is to propose a multi-medium cooling new energy air conditioning thermal management device to solve the problem of a management device that can achieve uniform temperature conduction of the battery cell under normal operating conditions, automatically switch to a heat insulation state under abnormal operating conditions, and guide heat to be concentratedly transferred to the cooling structure.

[0007] Based on the above objectives, the present invention provides a new energy air conditioning thermal management device with multi-medium cooling, including a battery box. Multiple sets of battery cells are disposed within the battery box. A thermal response switching partition is disposed between adjacent sets of battery cells. The thermal response switching partition contains a heat insulation medium storage cavity, a working cavity, and a thermal conductivity enhancement cavity. The heat insulation medium storage cavity is filled with heat insulation medium, and the working cavity is filled with thermal conductivity medium. A central piston plate is slidably disposed within the working cavity. The thermal response switching partition is provided with a locking pin and a shape memory alloy wire disposed on the central piston plate. The locking pin cooperates with a locking groove to limit and fix the central piston plate. A first spring is disposed within the thermal response switching partition to drive the central piston plate to move. When the shape memory alloy wire contracts due to heat and causes the locking pin to disengage from the locking groove, the first spring drives the central piston plate to move, causing the thermal conductivity medium in the working cavity to enter the thermal conductivity enhancement cavity, and simultaneously causing the heat insulation medium in the heat insulation medium storage cavity to enter the working cavity.

[0008] Furthermore, the thermal response switching partition is provided with an upper partition and a lower partition, which divide the internal space of the thermal response switching partition from top to bottom to form a thermal insulation medium storage cavity, a working cavity, and a thermal conductivity enhancement cavity.

[0009] Furthermore, the upper partition plate is provided with a liquid exchange hole, which is used to connect the heat insulation medium storage chamber and the working chamber; the lower partition plate is provided with a through hole, which is used to connect the working chamber and the heat conduction enhancement chamber; the middle piston plate can block the liquid exchange hole, and a baffle plate is slidably arranged in the through hole.

[0010] Furthermore, the barrier plate is fixedly connected to a connecting plate, and the connecting plate is connected to the middle piston plate through a connecting part. One end of the second spring is connected to the connecting plate, and the other end is connected to the inner wall of the through hole. When the middle piston plate moves, the connecting part drives the connecting plate to move, so that the barrier plate releases the blockage of the through hole.

[0011] Furthermore, a top piston plate is slidably disposed within the heat insulation medium storage cavity, and the top piston plate is sealed to the inner wall of the heat insulation medium storage cavity; a third spring is disposed within the heat insulation medium storage cavity, one end of the third spring is connected to the top piston plate, and the other end is connected to the side wall of the heat insulation medium storage cavity; the top piston plate and the middle piston plate are connected by a connecting rope.

[0012] Furthermore, the connecting rope is threaded through the fluid exchange hole, and both ends of the connecting rope are connected to the top piston plate and the middle piston plate respectively, so that when the middle piston plate moves, it drives the top piston plate to move synchronously.

[0013] Furthermore, the front and rear sides of the thermal response switching partition are respectively provided with slots, the locking pin is slidably disposed in the slots, and the locking slots are disposed on the front and rear sides of the central piston plate.

[0014] Furthermore, the shape memory alloy wire is a nickel-titanium shape memory alloy wire, and one end of the shape memory alloy wire is connected to a locking pin, while the other end is connected to a thermal response switching partition.

[0015] Furthermore, a liquid-cooled heat exchange plate is provided at the bottom of the battery box, the thermally enhanced cavity is located on the side close to the liquid-cooled heat exchange plate, the bottom wall of the thermally enhanced cavity is in contact with the top of the liquid-cooled heat exchange plate, the bottom of the thermal response switching partition is in contact with the top of the liquid-cooled heat exchange plate, and the bottom of the battery cell is in contact with the top of the liquid-cooled heat exchange plate.

[0016] Furthermore, the liquid-cooled heat exchange plate is provided with a layered plate, which divides the internal space of the liquid-cooled heat exchange plate into a coolant flow channel and a refrigerant flow channel. The refrigerant flow channel is connected to the vehicle's air conditioning refrigeration circuit through a refrigerant connecting pipe. A solenoid valve is provided on the refrigerant connecting pipe. A temperature sensor is provided in the battery box. The temperature sensor is electrically connected to the control system. When the temperature sensor detects that the temperature reaches a preset threshold, the control system controls the solenoid valve to open, so that the refrigerant in the refrigerant flow channel and the coolant in the coolant flow channel can exchange heat.

[0017] Compared with existing technologies, this invention, by setting a thermal response switching separator between adjacent cells, achieves balanced heat transfer between adjacent cells under normal operating conditions using the thermally conductive liquid in the working chamber, thereby reducing the internal temperature difference of the battery module and improving battery temperature consistency. When a cell experiences abnormal temperature rise, the shape memory alloy wire contracts upon heating and releases the locking of the central piston plate, allowing the thermally conductive liquid to transfer from the working chamber to the thermally enhanced chamber. Simultaneously, the thermally insulating liquid in the thermally insulating medium storage chamber enters the working chamber, achieving an automatic switch from thermally conductive to thermally insulating states. This increases the thermal resistance between the abnormal cell and adjacent cells, reducing heat loss to the surrounding environment. Cell propagation effectively suppresses thermal runaway propagation; simultaneously, the heat-conducting liquid concentrates within the heat-enhancing cavity, causing the heat generated by abnormal cells to converge and transfer towards the liquid-cooled heat exchange plate, forming a longitudinal heat conduction path and improving the efficiency of heat transfer to the cooling structure; furthermore, by controlling the refrigerant in the vehicle's air conditioning cooling circuit to enter the refrigerant channel inside the liquid-cooled heat exchange plate for heat exchange with the coolant, the heat dissipation capacity under abnormal operating conditions can be further improved, thus forming a synergistic thermal management mechanism that combines uniform temperature heat conduction, heat insulation and anti-diffusion, and enhanced heat dissipation, thereby improving the operational safety and thermal runaway protection capability of the power battery system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the battery box according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the arrangement structure of the battery cell and the thermal response switching separator in an embodiment of the present invention; Figure 4 This is a schematic cross-sectional view of the internal fluid exchange holes of the thermal response switching baffle in an embodiment of the present invention; Figure 5 This is a schematic cross-sectional view of the internal groove and through hole structure of the thermal response switching partition according to an embodiment of the present invention; Figure 6 Embodiments of the present invention Figure 5 A magnified structural diagram of A in the middle; Figure 7 This is a three-dimensional cross-sectional view of the internal structure of the thermal response switching partition according to an embodiment of the present invention; Figure 8 This is a top view of the intermediate cavity structure according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the intermediate cavity structure from below according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the locking groove and card slot structure according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the liquid-cooled heat exchanger structure according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the internal structure of the liquid-cooled heat exchange plate according to an embodiment of the present invention.

[0020] The diagram is marked as follows: 1. Battery box; 2. Cover; 3. Liquid-cooled heat exchange plate; 31. Layered plate; 32. Coolant connecting pipe; 33. Refrigerant connecting pipe; 331. Solenoid valve; 34. Coolant flow channel; 35. Refrigerant flow channel; 4. Battery cell; 5. Thermal response switching partition; 51. Upper partition; 52. Lower partition; 521. Through hole; 522. Retraction groove; 53. Insulation medium storage cavity; 531. Fluid exchange hole; 54. Working cavity; 541. Slide groove; 55. Thermal conductivity enhancement cavity; 56. Slot; 57. Locking pin; 58. Shape memory alloy wire; 6. Middle piston plate; 61. Mounting block; 62. First spring; 63. Barrier plate; 631. Connecting plate; 632. Connecting part; 633. Second spring; 64. Locking groove; 7. Top piston plate; 71. Third spring; 72. Connecting rope. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, this embodiment discloses a new energy air conditioning thermal management device with multi-media cooling, including a battery box 1, a cover 2 installed on the top of the battery box 1, a liquid-cooled heat exchange plate 3 provided at the bottom of the battery box 1, and multiple sets of battery cells 4 arranged inside the battery box 1, with a thermal response switching partition 5 arranged between two adjacent sets of battery cells 4.

[0024] The thermal response switching partition 5 is used to achieve balanced heat transfer under normal operating conditions of cell 4, and to automatically switch the heat conduction path and the heat insulation path when cell 4 experiences abnormal temperature rise, thereby reducing the risk of thermal runaway spreading to surrounding cells 4.

[0025] Furthermore, since both the heat-conducting medium and the heat-insulating medium are stored inside the thermal response switching separator 5, the relative positional relationship between the thermal response switching separator 5 and the adjacent cell 4 does not need to be changed during the switching between the heat-conducting state and the heat-insulating state. This allows the thermal management state to be switched within the limited battery module installation space, which is beneficial to improving the space utilization of the power battery system and the cell 4 arrangement density.

[0026] See Figures 4 to 10 The heat response switching partition 5 is provided with an upper partition 51 and a lower partition 52. The upper partition 51 and the lower partition 52 divide the internal space of the heat response switching partition 5 from top to bottom to form a heat insulation medium storage cavity 53, a working cavity 54 and a heat conduction enhancement cavity 55.

[0027] The heat insulation medium storage cavity 53 is filled with heat insulation liquid; the working cavity 54 is filled with heat conduction liquid; and the heat conduction enhancement cavity 55 is initially an empty cavity.

[0028] The thermally conductive liquid is preferably one or more of thermally conductive silicone oil, nano thermally conductive fluid or thermally conductive gel, and its thermal conductivity is higher than that of the thermal insulation liquid, so as to achieve balanced heat transfer between adjacent cells 4.

[0029] The heat insulation liquid preferably adopts a low thermal conductivity barrier medium, such as one or more of aerogel slurry, hollow glass microsphere suspension, and intumescent flame retardant slurry. After entering the working chamber 54, it can form a high thermal barrier heat layer, thereby reducing the heat transfer rate from the abnormal cell 4 to the adjacent cell 4.

[0030] A central piston plate 6 is slidably disposed inside the working chamber 54. The central piston plate 6 is sealed to the inner wall of the thermal response switching partition 5. A sealing strip is provided on the outer periphery of the central piston plate 6 to prevent the medium in the heat insulation medium storage chamber 53, the working chamber 54 and the heat conduction enhancement chamber 55 from flowing across each other.

[0031] The upper partition 51 is provided with a liquid exchange hole 531, which is used to connect the heat insulation medium storage chamber 53 and the working chamber 54.

[0032] The bottom of the upper partition plate 51 is provided with a sliding groove 541, and an installation block 61 is slidably disposed in the sliding groove 541. The installation block 61 is fixedly disposed on the top of the middle piston plate 6.

[0033] A first spring 62 is provided inside the slide groove 541. One end of the first spring 62 is connected to the mounting block 61, and the other end is connected to the end of the slide groove 541. Under normal conditions, the first spring 62 is in a stretched state.

[0034] Under normal conditions, the middle piston plate 6 is located on the side close to the fluid exchange hole 531 and blocks the fluid exchange hole 531.

[0035] The lower partition 52 has a through hole 521, which is used to connect the working chamber 54 and the heat conduction enhancement chamber 55.

[0036] A retraction groove 522 is provided on the side of the through hole 521 away from the middle piston plate 6.

[0037] A baffle plate 63 is slidably disposed inside the through hole 521, and the baffle plate 63 can block the through hole 521.

[0038] A connecting plate 631 is fixedly installed on the side of the barrier plate 63 near the middle piston plate 6, and the connecting plate 631 is connected to the middle piston plate 6 through a connecting part 632.

[0039] The connecting part 632 is preferably made of a flexible connecting rope.

[0040] A second spring 633 is provided between the connecting plate 631 and the wall of the through hole 521.

[0041] Under normal conditions, the second spring 633 is in a stretched state, and the baffle plate 63 blocks the through hole 521, thus isolating the working cavity 54 from the heat-conducting enhancement cavity 55.

[0042] Locking grooves 64 are provided on the front and rear sides of the central piston plate 6.

[0043] The inner walls of the front and rear sides of the thermal response switching partition 5 are respectively provided with slots 56 corresponding to the locking slots 64.

[0044] A locking pin 57 is slidably installed inside the card slot 56.

[0045] The card slot 56 is also equipped with a shape memory alloy wire 58. One end of the shape memory alloy wire 58 is connected to the locking pin 57, and the other end is connected to the end of the card slot 56.

[0046] Preferably, the shape memory alloy wire 58 is made of nickel-titanium shape memory alloy, and its operating temperature is set to 120℃~180℃. The operating temperature is higher than the normal operating temperature of the power battery and the fast charging operating temperature, but lower than the thermal runaway propagation temperature.

[0047] Under normal conditions, the locking pin 57 is partially inserted into the locking groove 64, thereby locking the central piston plate 6.

[0048] A top piston plate 7 is also slidably disposed inside the heat insulation medium storage cavity 53, and the top piston plate 7 is located on the side away from the fluid exchange hole 531.

[0049] The top piston plate 7 is sealed to the inner wall of the heat insulation medium storage cavity 53.

[0050] A third spring 71 is provided inside the heat insulation medium storage cavity 53. One end of the third spring 71 is connected to the top piston plate 7, and the other end is connected to the side wall of the heat insulation medium storage cavity 53.

[0051] The top piston plate 7 and the middle piston plate 6 are connected by a connecting rope 72.

[0052] The top piston plate 7 and the middle piston plate 6 are connected by a connecting rope 72, which is connected to the top of the middle piston plate 6 through the fluid exchange hole 531. Under normal conditions, the middle piston plate 6 is located at the fluid exchange hole 531 and blocks the fluid exchange hole 531, thereby preventing the heat insulation medium in the heat insulation medium storage cavity 53 from entering the working cavity 54.

[0053] The linkage structure of the top piston plate 7, the middle piston plate 6, and the connecting rope 72 ensures that the device can switch media in horizontal, inclined, or vertical states, thus improving the applicability of the device.

[0054] See Figure 11 and Figure 12 The liquid-cooled heat exchange plate 3 has a layered plate 31 inside, which divides the internal space of the liquid-cooled heat exchange plate 3 into a coolant flow channel 34 and a refrigerant flow channel 35.

[0055] The coolant flow channel 34 is connected to coolant connecting pipes 32 at both ends, and the coolant connecting pipes 32 are used to connect to the vehicle's liquid cooling circulation system.

[0056] The refrigerant flow channel 35 is connected to refrigerant connecting pipes 33 at both ends, and the two sets of refrigerant connecting pipes 33 are connected in parallel with the vehicle air conditioning refrigeration circuit.

[0057] A solenoid valve 331 is installed on the refrigerant connecting pipe 33.

[0058] A temperature sensor is installed inside the battery box 1; The working process of this embodiment is as follows: Under normal operating conditions, the shape memory alloy wire 58 has not reached the operating temperature, the locking pin 57 is inserted into the locking groove 64, and the central piston plate 6 is fixed in the initial position.

[0059] At this time, the central piston plate 6 blocks the fluid exchange hole 531, the baffle plate 63 blocks the through hole 521, and the heat insulation medium storage cavity 53, the working cavity 54 and the heat conduction enhancement cavity 55 are isolated from each other.

[0060] The working chamber 54 is filled with a heat-conducting liquid.

[0061] Because the thermally conductive liquid has high thermal conductivity, it can transfer the heat generated by the higher-temperature cell 4 to the lower-temperature adjacent cell 4, thereby reducing the temperature difference between each cell 4 and achieving uniform temperature of the battery module.

[0062] When a certain group of battery cells 4 experiences a continuous temperature rise due to internal short circuit, overcharging, mechanical damage, or other abnormal operating conditions, its heat is transferred to the corresponding thermal response switching partition 5.

[0063] When the temperature reaches the operating temperature of the shape memory alloy wire 58, the shape memory alloy wire 58 contracts, thereby pulling the locking pin 57 out of the locking groove 64.

[0064] At this point, the central piston plate 6 is unlocked.

[0065] Under the elastic reset action of the first spring 62, the middle piston plate 6 moves away from the fluid exchange hole 531.

[0066] During the movement of the central piston plate 6, the connecting plate 631 moves synchronously through the connecting part 632.

[0067] Under the action of the second spring 633, the baffle plate 63 enters the retraction groove 522, thereby releasing the blockage of the through hole 521 and making the working cavity 54 connected with the heat-conducting enhancement cavity 55.

[0068] At the same time, the central piston plate 6 releases the blockage of the fluid exchange hole 531, allowing the heat insulation medium storage chamber 53 to connect with the working chamber 54.

[0069] As the movement of the central piston plate 6 causes the effective volume of the working chamber 54 to decrease, the heat-conducting liquid in the working chamber 54 is actively squeezed and enters the heat-conducting enhancement chamber 55 through the through hole 521.

[0070] Meanwhile, the middle piston plate 6 drives the top piston plate 7 to move through the connecting rope 72. Under the action of the third spring 71, the top piston plate 7 actively squeezes the heat insulation liquid in the heat insulation medium storage cavity 53 into the working cavity 54.

[0071] This allows for the switching of the positions of the heat-conducting liquid and the heat-insulating liquid.

[0072] After the switching is completed, the working chamber 54 is mainly filled with heat-insulating liquid, and the heat-conducting enhancement chamber 55 is mainly filled with heat-conducting liquid.

[0073] Since the insulating liquid is located between adjacent cells 4, it can increase the thermal resistance between adjacent cells 4, reduce the rate and area of ​​heat transfer from abnormal cell 4 to surrounding normal cells 4, thereby suppressing the spread of thermal runaway.

[0074] Meanwhile, the heat-conducting liquid is concentrated in the heat-conducting enhancement cavity 55.

[0075] Since the thermally enhanced cavity 55 is in contact with the top of the liquid-cooled heat exchange plate 3, when the thermally conductive liquid enters the thermally enhanced cavity 55, the thermally enhanced cavity 55 forms a thermally conductive medium layer between the battery cell 4 and the liquid-cooled heat exchange plate 3, so that the heat generated by the abnormal battery cell 4 is concentrated and transferred to the liquid-cooled heat exchange plate 3, thereby achieving longitudinal enhanced heat dissipation.

[0076] Furthermore, the linkage between the top piston plate 7 and the middle piston plate 6 can actively drive the heat-conducting medium and the heat-insulating medium to complete the position switching, thereby improving the reliability of the medium switching process.

[0077] Furthermore, when the temperature sensor detects that the internal temperature of the battery box 1 reaches a preset threshold, the control system controls the solenoid valve 331 to open.

[0078] After the solenoid valve 331 is opened, the refrigerant in the vehicle's air conditioning cooling circuit enters the refrigerant flow channel 35 and flows.

[0079] The refrigerant in the refrigerant channel 35 and the coolant in the coolant channel 34 exchange heat through the layered plate 31.

[0080] After the coolant cools down, it continues to flow through the vehicle's liquid cooling system, thereby improving the ability of the liquid cooling heat exchange plate 3 to absorb heat from the abnormal battery cell 4.

[0081] Therefore, under normal operating conditions, the present invention utilizes a thermally conductive liquid to achieve uniform temperature conduction between the cells 4; under abnormal operating conditions, the medium switching is triggered by the shape memory alloy wire 58, causing the working chamber 54 to switch from a thermally conductive state to a thermally insulating state. At the same time, the thermally conductive liquid is transferred to the thermally enhanced chamber 55, and the liquid-cooled heat exchange plate 3 and the vehicle air conditioning cooling circuit are linked to enhance heat dissipation, thereby forming a synergistic thermal management mechanism of lateral thermal insulation, longitudinal thermal conduction and air conditioning auxiliary cooling, effectively reducing the risk of thermal runaway propagation of the power battery and improving the operational safety of the power battery system of new energy vehicles.

[0082] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0083] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A new energy air conditioning thermal management device with multi-medium cooling, comprising a battery box (1), wherein multiple sets of battery cells (4) are disposed within the battery box (1), and a thermal response switching partition (5) is disposed between two adjacent sets of battery cells (4), characterized in that: The thermal response switching partition (5) is internally provided with a thermal insulation medium storage cavity (53), a working cavity (54), and a thermal conductivity enhancement cavity (55). The thermal insulation medium storage cavity (53) is filled with thermal insulation medium, and the working cavity (54) is filled with thermal conductivity medium. A central piston plate (6) is slidably disposed in the working cavity (54). The thermal response switching partition (5) is provided with a locking pin (57), a locking groove (64) disposed on the central piston plate, and a shape memory alloy wire (58). The locking pin (57) and the locking groove (64) are connected in a specific manner. 64) The middle piston plate (6) is fixed in place; the thermal response switching partition (5) is provided with a first spring (62) for driving the middle piston plate (6) to move. When the shape memory alloy wire (58) is heated and shrinks and drives the locking pin (57) to disengage from the locking groove (64), the first spring (62) drives the middle piston plate (6) to move, so that the heat-conducting medium in the working chamber (54) enters the heat-conducting enhancement chamber (55), and at the same time, the heat-insulating medium in the heat-insulating medium storage chamber (53) enters the working chamber (54).

2. The new energy air conditioning thermal management device with multi-media cooling according to claim 1, characterized in that: The thermal response switching partition (5) is provided with an upper partition (51) and a lower partition (52). The upper partition (51) and the lower partition (52) divide the internal space of the thermal response switching partition (5) from top to bottom to form a thermal insulation medium storage cavity (53), a working cavity (54), and a thermal conductivity enhancement cavity (55).

3. The new energy air conditioning thermal management device with multi-media cooling according to claim 2, characterized in that: The upper partition (51) is provided with a liquid exchange hole (531), which is used to connect the heat insulation medium storage chamber (53) and the working chamber (54); the lower partition (52) is provided with a through hole (521), which is used to connect the working chamber (54) and the heat conduction enhancement chamber (55); the middle piston plate (6) can block the liquid exchange hole (531), and a baffle plate (63) is slidably arranged in the through hole (521).

4. The new energy air conditioning thermal management device with multi-media cooling according to claim 3, characterized in that: The barrier plate (63) is fixedly connected to a connecting plate (631). The connecting plate (631) is connected to the middle piston plate (6) through a connecting part (632). One end of the second spring (633) is connected to the connecting plate (631), and the other end is connected to the inner wall of the through hole (521). When the middle piston plate (6) moves, the connecting plate (631) is moved through the connecting part (632) so that the barrier plate (63) releases the blockage of the through hole (521).

5. A new energy air conditioning thermal management device with multi-media cooling according to claim 3, characterized in that: A top piston plate (7) is slidably disposed inside the heat insulation medium storage cavity (53), and the top piston plate (7) is sealed to the inner wall of the heat insulation medium storage cavity (53); a third spring (71) is disposed inside the heat insulation medium storage cavity (53), one end of the third spring (71) is connected to the top piston plate (7), and the other end is connected to the side wall of the heat insulation medium storage cavity (53); the top piston plate (7) and the middle piston plate (6) are connected by a connecting rope (72).

6. A new energy air conditioning thermal management device with multi-media cooling according to claim 5, characterized in that: The connecting rope (72) is inserted into the fluid exchange hole (531), and the two ends of the connecting rope (72) are respectively connected to the top piston plate (7) and the middle piston plate (6) so that the top piston plate (7) moves synchronously when the middle piston plate (6) moves.

7. A new energy air conditioning thermal management device with multi-media cooling according to claim 1, characterized in that: The thermal response switching partition (5) has slots (56) on its front and rear sides respectively. The locking pin (57) is slidably disposed in the slot (56). The locking groove (64) is disposed on the front and rear sides of the central piston plate (6).

8. A new energy air conditioning thermal management device with multi-media cooling according to claim 1, characterized in that: The shape memory alloy wire (58) is a nickel-titanium shape memory alloy wire, and one end of the shape memory alloy wire (58) is connected to the locking pin (57), and the other end is connected to the thermal response switching partition (5).

9. A new energy air conditioning thermal management device with multi-media cooling according to claim 1, characterized in that: The bottom of the battery box (1) is provided with a liquid-cooled heat exchange plate (3), the thermally enhanced cavity (55) is provided on the side close to the liquid-cooled heat exchange plate (3), the bottom wall of the thermally enhanced cavity (55) is in contact with the top of the liquid-cooled heat exchange plate (3), the bottom of the thermal response switching partition (5) is in contact with the top of the liquid-cooled heat exchange plate (3), and the bottom of the battery cell (4) is in contact with the top of the liquid-cooled heat exchange plate (3).

10. A new energy air conditioning thermal management device with multi-media cooling according to claim 9, characterized in that: The liquid-cooled heat exchange plate (3) is provided with a layered plate (31). The layered plate (31) divides the internal space of the liquid-cooled heat exchange plate (3) into a coolant flow channel (34) and a refrigerant flow channel (35). The refrigerant flow channel (35) is connected to the vehicle air conditioning refrigeration circuit through a refrigerant connecting pipe (33). A solenoid valve (331) is provided on the refrigerant connecting pipe (33). A temperature sensor is provided in the battery box (1). The temperature sensor is electrically connected to the control system. When the temperature sensor detects that the temperature reaches a preset threshold, the control system controls the solenoid valve (331) to open, so that the refrigerant in the refrigerant flow channel (35) and the coolant in the coolant flow channel (34) can exchange heat.

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