Thermal management system and battery system

Abstract

The present invention belongs to the technical field of power batteries, and discloses a thermal management system and a battery system. The battery system comprises a battery pack and a thermal management system. The battery pack comprises battery cells; the thermal management system comprises a thermal management water cooling unit arranged outside the battery pack, a cooling device and a commutator arranged inside the battery pack; the cooling device can exchange heat with the battery cells, and the cooling device is provided with two water inlets; the commutator is arranged between the thermal management water cooling unit and the cooling device, the commutator is connected to the water outlet and the water return inlet of the thermal management water cooling unit, and the commutator is configured to selectively connect the water outlet to one of the water inlets, and connect the water return inlet to the other water inlet at the same time, so as to change the circulation direction of the coolant in the cooling device, so that the surface temperature of all battery cells in the battery pack is balanced and consistent, thereby improving the service life of the battery cells, and further improving the service life of the battery system.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a thermal management system and a battery system. Background Art

[0002] At present, power batteries generally use a thermal management system to regulate the temperature of the battery cells. Generally, the thermal management system of the power battery system of new energy vehicles is carried out through an external water cooling unit and a built-in cold plate connected to the water cooling unit. The cooling water flows out of the water cooling unit, and then flows into the cold plate through the cold plate water inlet, circulates inside the battery pack, takes away the heat generated by the battery cells, and then flows out from the cold plate water outlet to the water cooling unit, thereby achieving the effect of dissipating heat and cooling the battery cells.

[0003] Generally, the water cooling unit is equipped with a water return port and a water outlet. The water outlet is connected to the water inlet of the cold plate, and the water return port is connected to the water outlet of the cold plate. Therefore, the temperature of the cooling water at the water return port is higher than that at the water outlet. As the cooling water circulation time becomes longer and longer, the temperature of the battery cell near the water outlet of the cold plate will be significantly higher than the temperature of the battery cell near the water inlet of the cold plate. Over time, the surface temperature of the battery cell will be uneven, the temperature difference will gradually increase, and the system will frequently issue temperature difference alarms, affecting the user experience and seriously affecting the life of the battery cell.

[0004] Therefore, it is urgent to design a thermal management system and a battery system to solve the problem of uneven surface temperature of the battery cells in the battery pack, gradually increasing temperature difference, and resulting in a short battery cell life. Summary of the invention

[0005] An object of the present invention is to provide a thermal management system that can balance the surface temperature of an external structure that exchanges heat with the external structure and improve its consistency, thereby increasing the service life of the external structure.

[0006] Another object of the present invention is to provide a battery system that can balance the surface temperature of the battery cells and improve consistency, thereby increasing the service life of the battery cells and the battery system.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Thermal management system, including:

[0009] Thermal management water cooling unit;

[0010] A cooling device, wherein the cooling device is provided with two water inlets;

[0011] A reversing member is arranged between the above-mentioned thermal management water cooling unit and the above-mentioned cooling device. The above-mentioned reversing member is connected to the water outlet and the return water port of the above-mentioned thermal management water cooling unit. The above-mentioned reversing member is configured to be able to selectively connect the above-mentioned water outlet to one of the above-mentioned water ports, and connect the above-mentioned return water port to the other above-mentioned water port, so as to change the circulation direction of the coolant in the above-mentioned cooling device.

[0012] Optionally, the above-mentioned reversing member includes a first electromagnetic coil, a second electromagnetic coil and a valve body, and the above-mentioned first electromagnetic coil and the above-mentioned second electromagnetic coil are respectively arranged at two ends of the above-mentioned valve body, and the above-mentioned first electromagnetic coil is configured to be able to move the above-mentioned valve body toward the first end so that the above-mentioned water outlet is selectively connected to one of the above-mentioned water outlets; the above-mentioned second electromagnetic coil is configured to be able to move the above-mentioned valve body toward the second end so that the above-mentioned water outlet is connected to the other one of the above-mentioned water outlets.

[0013] Optionally, the reversing member is further provided with a first water cooling unit connecting port, a second water cooling unit connecting port, a first water inlet connecting port, a second water inlet connecting port, a first water outlet connecting port and a second water outlet connecting port, the first water cooling unit connecting port is connected to the water outlet, the second water cooling unit connecting port is connected to the water return port, one of the water ports of the cooling device is connected to the first water inlet connecting port and the second water outlet connecting port, and the other water port is connected to the second water inlet connecting port and the first water outlet connecting port;

[0014] When the valve body moves toward the first end, the first water cooling unit communication port is connected to the first water inlet communication port, and the second water cooling unit communication port is connected to the first water outlet communication port, so that the water outlet is connected to one of the water ports of the cooling device, and the water return port is connected to the other water port of the cooling device;

[0015] When the valve body moves toward the second end, the first water cooling unit connecting port is connected to the second water inlet connecting port, and the second water cooling unit connecting port is connected to the second water outlet connecting port, so that the water outlet is connected to the other water inlet of the cooling device, and the return water port is connected to one of the water inlets of the cooling device.

[0016] Optionally, the thermal management system further includes a first three-way joint, a first end of which is connected to one of the water outlets via a pipeline, a second end of which is connected to the first water inlet connecting port via a pipeline, and a third end of which is connected to the second water outlet connecting port via a pipeline.

[0017] Optionally, the thermal management system further includes a second three-way joint, a first port of the second three-way joint being connected to another of the water outlets through a pipeline, a second port being connected to the second water inlet connecting port through a pipeline, and a third port being connected to the first water outlet connecting port through a pipeline.

[0018] Optionally, the above-mentioned reversing element is a reversing solenoid valve.

[0019] Optionally, the thermal management system further includes:

[0020] At least two temperature detection units, at least one temperature detection unit is respectively installed at the two water outlets of the cooling device.

[0021] Optionally, the thermal management system further includes at least two throttle valves, and each of the water outlets is provided with at least one throttle valve.

[0022] Battery system, including:

[0023] Battery pack, including battery cells;

[0024] The above-mentioned thermal management system, the above-mentioned thermal management water cooling unit is arranged outside the above-mentioned battery pack, the above-mentioned cooling device is arranged inside the above-mentioned battery pack, and the above-mentioned cooling device is configured to be able to exchange heat with the battery cells in the above-mentioned battery pack.

[0025] Optionally, the battery system further includes a battery management system, which is electrically connected to the battery pack and the thermal management system, and is configured to control and monitor the battery pack and the thermal management system.

[0026] Beneficial effects of the present invention:

[0027] The present invention provides a thermal management system, comprising a thermal management water cooling unit, a cooling device and a reversing member arranged between the cooling device and the thermal management water cooling unit. The cooling device can exchange heat with an external structure. By arranging a reversing member between the thermal management water cooling unit and the cooling device, a water outlet of the thermal management water cooling unit can be connected to any one of the two water outlets of the cooling device, and a water return port of the thermal management water cooling unit can be connected to the other water outlet, so that the circulation direction of the coolant in the cooling device can be switched, so that each water outlet of the cooling device can be used as a water inlet or a water outlet, and then in the cooling process of the thermal management system, the circulation direction of the coolant in the cooling device can be changed according to demand by controlling the reversing member, thereby improving the heat dissipation efficiency, making the surface temperature consistency of the external structure that exchanges heat with the cooling device better, and thus improving the service life of the external structure.

[0028] The present invention also provides a battery system, including a battery pack and the above-mentioned thermal management system, the battery pack includes battery cells, the thermal management water cooling unit is arranged outside the battery pack, and the cooling device is arranged in the above-mentioned battery pack. The circulation direction of the coolant in the cooling device is changed by a reversing member, so that the surface consistency of the battery cell is better, thereby improving the service life of the battery cell, and then improving the service life of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The structure of the thermal management system provided by the specific embodiment of the present invention is schematically shown. Figure 1 ;

[0030] Figure 2 The structure of the thermal management system provided by the specific embodiment of the present invention is schematically shown. Figure 2 ;

[0031] Figure 3 It is a schematic structural diagram of a switching member provided in a specific embodiment of the present invention.

[0032] In the figure:

[0033] 10. Thermal management water cooling unit; 11. Water outlet; 12. Water return outlet;

[0034] 20. Cooling device; 21. First water inlet; 22. Second water inlet;

[0035] 30, reversing member; 31, first electromagnetic coil; 311, first connector; 32, second electromagnetic coil; 321, second connector;

[0036] 33, valve body; 331, iron core; 332, first movable valve core; 333, second movable valve core; 334, third movable valve core; 335, fourth movable valve core; 336, fifth movable valve core; 337, first water return chamber; 338, second water return chamber; 339, first water inlet chamber; 340, second water inlet chamber;

[0037] 34. First water cooling unit connecting port; 35. Second water cooling unit connecting port; 36. First water inlet connecting port; 37. Second water inlet connecting port; 38. First water outlet connecting port; 39. Second water outlet connecting port;

[0038] 40. First three-way connector; 50. Second three-way connector; 60. Temperature detection unit; 70. Throttle valve;

[0039] 200, battery pack; 210, battery cell;

[0040] 300. Battery management system. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] like Figure 1 and Figure 2 As shown, the present embodiment provides a thermal management system, which includes a thermal management water cooling unit 10, a cooling device 20, and a reversing member 30 arranged between the thermal management water cooling unit 10 and the cooling device 20. The reversing member 30 can change the circulation direction of the coolant in the cooling device 20, so that the surface temperature of the external structure that exchanges heat with the cooling device 20 is balanced and more consistent, thereby increasing the service life of the external structure.

[0046] Specifically, the cooling device 20 is provided with two water inlets, both of which can be connected to the thermal management water cooling unit 10, so that the coolant can flow from the thermal management water cooling unit 10 into the cooling device 20, thereby realizing heat exchange between the cooling device 20 and the external structure. Furthermore, the reversing member 30 is connected to the water outlet 11 and the water return port 12 of the thermal management water cooling unit 10, and the reversing member 30 can selectively connect the water outlet 11 to one of the water inlets, and connect the water return port 12 to the other water inlet, so as to change the circulation direction of the coolant in the cooling device 20.

[0047] Through the above structure, when the external structure needs to be cooled, the thermal management water cooling unit 10 cools the coolant, and the coolant flows into the cooling device 20 to cool the external structure. In this process, the circulation direction of the coolant in the cooling device 20 can be changed by switching the reversing member 30, that is, each water outlet in the cooling device 20 can be selected to be connected to the water outlet 11 of the thermal management unit, and the other water outlet is connected to the return water outlet 12, that is, each water outlet can take in or out water, and when one of the water outlets takes in water, the other water outlet discharges water (that is, when one of the water outlets is connected to the water outlet 11, the other water outlet is connected to the return water outlet 12), thereby avoiding the large temperature difference of the battery cells 210 at the two water outlet positions of the cooling device 20 caused by the single circulation direction of the coolant, so that the surface temperature of the external structure is balanced, the temperature difference is reduced, and the consistency is better, thereby improving the service life of the battery pack 200.

[0048] Specifically, in this embodiment, the two water inlets are respectively the first water inlet 21 and the second water inlet 22. When the water outlet 11 is connected to the first water inlet 21 and the water return port 12 is connected to the second water inlet 22, that is, when the first water inlet 21 takes in water and the second water inlet 22 discharges water, the circulation direction of the coolant in the cooling device 20 is counterclockwise; otherwise, the circulation direction of the coolant in the cooling device 20 is clockwise. In addition, the external structure described in this embodiment is the battery cell 210 in this embodiment, and the battery cell 210 is referred to below. It can be understood that the external structure in other embodiments can be any structure that needs to be heat exchanged, which is not specifically limited here.

[0049] In this embodiment, if Figures 1 to 3As shown, the above-mentioned reversing member 30 includes a first electromagnetic coil 31, a second electromagnetic coil 32 and a valve body 33. The first electromagnetic coil 31 and the second electromagnetic coil 32 are respectively arranged at two ends of the valve body 33, and the first electromagnetic coil 31 can be energized to make the valve body 33 move toward the first end (the first end here is the end that moves toward the first electromagnetic coil 31 and is attracted by the first electromagnetic coil 31), so that the water outlet 11 is connected to one of the water outlets; the second electromagnetic coil 32 can be energized to make the valve body 33 move toward the second end (the second end here is the end that moves toward the second electromagnetic coil 32 and is attracted by the second electromagnetic coil 32), so that the water outlet 11 is connected to the other water outlet.

[0050] Specifically, in this embodiment, when the first electromagnetic coil 31 is energized to make the valve body 33 move toward the first end, the water outlet 11 can be connected to the first water outlet 21, and the water return port 12 can be connected to the second water outlet 22, that is, the first water outlet 21 is filled with water, and the second water outlet 22 is discharged. At this time, the circulation direction of the coolant in the cooling device 20 is counterclockwise flow; when the second electromagnetic coil 32 is energized to make the valve body 33 move toward the second end, the water outlet 11 can be connected to the second water outlet 22, and the water return port 12 can be connected to the first water outlet 21, that is, the second water outlet 22 is filled with water, and the first water outlet 21 is discharged. At this time, the circulation direction of the coolant in the cooling device 20 is clockwise flow. Through the above structure, the reversing member 30 can change the circulation direction of the coolant in the cooling device 20.

[0051] Furthermore, if Figures 1 to 3 As shown, the reversing member 30 also includes a first water cooling unit connecting port 34, a second water cooling unit connecting port 35, a first water inlet connecting port 36, a second water inlet connecting port 37, a first water outlet connecting port 38 and a second water outlet connecting port 39. The first water cooling unit connecting port 34 is connected to the water outlet 11, the second water cooling unit connecting port 35 is connected to the return water port 12, one of the water ports of the cooling device 20 is connected to the first water inlet connecting port 36 and the second water outlet connecting port 39, and the other water port is connected to the second water inlet connecting port 37 and the first water outlet connecting port 38; when the valve body 33 moves toward the first end, the first water cooling unit connecting port 34 is connected to the first water inlet connecting port The water connecting port 36 and the second water cooling unit connecting port 35 are connected to the first water outlet connecting port 38; when the valve body 33 moves toward the second end, the first water cooling unit connecting port 34 is connected to the second water inlet connecting port 37, and the second water cooling unit connecting port 35 is connected to the second water outlet connecting port 39; thereby, when the valve body 33 moves toward the first end, the water outlet 11 is connected to the first water port 21, and the water return port 12 is connected to the second water port 22; when the valve body 33 moves toward the second end, the water outlet 11 is connected to the second water port 22, and the water return port 12 is connected to the first water port 21, thereby realizing that the reversing member 30 changes the circulation direction of the coolant in the cooling device 20.

[0052] Alternatively, if Figure 3 As shown, the valve body 33 includes an iron core 331, a first movable valve core 332, a second movable valve core 333, a third movable valve core 334, a fourth movable valve core 335 and a fifth movable valve core 336. The first movable valve core 332, the second movable valve core 333, the third movable valve core 334, the fourth movable valve core 335 and the fifth movable valve core 336 are all arranged at intervals on the iron core 331 and are sealed against the inner wall of the reversing member 30, so that a sealed chamber can be formed between each adjacent movable valve core, and the above five movable valve cores can move with the iron core 331. In this embodiment, a first return water chamber 337 is formed between the second movable valve core 333 and the third movable valve core 334, a second return water chamber 338 is formed between the first movable valve core 332 and the second movable valve core 333, a first water inlet chamber 339 is formed between the fourth movable valve core 335 and the fifth movable valve core 336, and a second water inlet chamber 340 is formed between the third movable valve core 334 and the fourth movable valve core 335.

[0053] Further optionally, the cross-sectional areas of the second movable valve core 333 and the fourth movable valve core 335 are both larger than the cross-sectional areas of the above-mentioned two water inlet connecting ports and the two water outlet connecting ports, and the second movable valve core 333 can selectively block the first water outlet connecting port 38 or the second water outlet connecting port 39, while the fourth movable valve core 335 can selectively block the first water inlet connecting port 36 or the second water inlet connecting port 37.

[0054] Through the above structure, in this embodiment, if Figure 1 As shown, when the first electromagnetic coil 31 is energized, the iron core 331 drives the five movable valve cores to move toward the first end and are attracted by the first electromagnetic coil 31. At this time, the second movable valve core 333 blocks the second water outlet connecting port 39, and the fourth movable valve core 335 blocks the second water inlet connecting port 37, so that the first water cooling unit connecting port 34 and the first water inlet connecting port 36 are both located in the first water inlet chamber 339 (that is, between the fourth movable valve core 335 and the fifth movable valve core 336). The cooling unit connecting port 35 and the first water outlet connecting port 38 are both located in the first return water chamber 337 (i.e., between the second movable valve core 333 and the third movable valve core 334), so that the water outlet 11 is connected to the first water port 21 through the first water cooling unit connecting port 34 and the first water inlet connecting port 36, and the return water port 12 is connected to the second water port 22 through the second water cooling unit connecting port 35 and the first water outlet connecting port 38, and the circulation direction of the coolant in the cooling device 20 is counterclockwise.

[0055] like Figure 2As shown, when the second electromagnetic coil 32 is energized, the iron core 331 drives the five movable valve cores to move toward the second end and is attracted by it, the second movable valve core 333 blocks the first water outlet connecting port 38, and the fourth movable valve core 335 blocks the first water inlet connecting port 36. At this time, the first water cooling unit connecting port 34 and the second water inlet connecting port 37 are both located in the second water inlet chamber 340 (i.e., between the third movable valve core 334 and the fourth movable valve core 335), the second water cooling unit connecting port 35 and the second water outlet connecting port 39 are both located in the second return water chamber 338 (i.e., between the first movable valve core 332 and the second movable valve core 333), so that the return water port 12 is connected to the first water port 21 through the second water cooling unit connecting port 35 and the second water outlet connecting port 39, and the water outlet 11 is connected to the second water port 22 through the first water cooling unit connecting port 34 and the second water inlet connecting port 37, and the circulation direction of the coolant in the cooling device 20 is clockwise.

[0056] Furthermore, if Figure 3 As shown, the above-mentioned switching element 30 also includes a first connector 311 and a second connector 321. The first connector 311 is electrically connected to the first electromagnetic coil 31, and the second connector 321 is electrically connected to the second electromagnetic coil 32, so that the first electromagnetic coil 31 and the second electromagnetic coil 32 can be electrically connected to an external power supply, thereby realizing the switching of the first electromagnetic coil 31 and the second electromagnetic coil 32.

[0057] Optionally, the switching element 30 is a switching solenoid valve, which can realize all the functions of the above switching element 30. Preferably, the switching element 30 is a dual-electrically controlled direct-acting four-way solenoid valve, which can meet all the requirements of the above switching element 30 and has high precision.

[0058] In this embodiment, if Figure 1 and Figure 2 As shown, the thermal management system also includes a first three-way joint 40, a first end of the first three-way joint 40 is connected to the first water port 21 through a pipeline, a second end is connected to the first water inlet connection port 36 through a pipeline, and a third end is connected to the second water outlet connection port 39 through a pipeline.

[0059] Furthermore, if Figure 1 and Figure 2 As shown, the thermal management system also includes a second three-way joint 50, a first port of the second three-way joint 50 is connected to the second water port 22 through a pipeline, a second port is connected to the second water inlet connection port 37 through a pipeline, and a third port is connected to the first water outlet connection port 38 through a pipeline.

[0060] like Figure 1 and Figure 2As shown, the thermal management system further includes at least two temperature detection units 60. At least one temperature detection unit 60 is installed at each of the two water outlets of the cooling device 20. In this embodiment, each water outlet is provided with a temperature detection unit 60 for detecting the water temperature at the two water outlets. Optionally, the temperature detection unit 60 is a temperature sensor, which is more practical and has low cost.

[0061] Furthermore, if Figure 1 and Figure 2 As shown, the thermal management system also includes at least two throttle valves 70, and at least one throttle valve 70 is provided at each water outlet, which can control the water flow rate of each water outlet, and then control the flow rate of the coolant, so that the heat dissipation effect of the coolant during the flow in the cooling device 20 is optimal.

[0062] This embodiment also provides a battery system, which includes a battery pack 200 and the above-mentioned thermal management system. The battery pack 200 includes a battery cell 210. The thermal management water cooling unit 10 is arranged outside the battery pack 200, and the cooling device 20 is arranged inside the above-mentioned battery pack 200. The thermal management system can achieve thermal management of the battery cell 210 in the battery pack 200. The circulation direction of the coolant in the cooling device 20 is changed by the reversing member 30 in the thermal management system, so that the surface temperature of the battery cell 210 exchanging heat with the cooling device 20 is balanced, thereby improving the service life of the battery system.

[0063] Optionally, the battery system further includes a battery management system 300, which is electrically connected to the battery pack 200 and the thermal management system, and is used to control and monitor the status of the battery pack 200 and the thermal management system, including the control of the power, temperature, and high-voltage box of the battery cells 210 inside the battery pack 200, and the control of the temperature detection unit 60, the throttle valve 70, and the switching element 30 in the thermal management system. Specifically, the battery management system 300 is electrically connected to the first connector 311 and the second connector 321 in the switching element 30, and can control the on and off of the first electromagnetic coil 31 and the second electromagnetic coil 32.

[0064] In the present embodiment, when the battery pack 200 is in a high temperature state and the battery cell 210 needs to be cooled, the battery management system 300 controls the thermal management water cooling unit 10 to cool the coolant, and at the same time controls the first electromagnetic coil 31 to be energized to attract the iron core 331, and the second electromagnetic coil 32 to be de-energized, so that the water outlet 11 is connected to the first water port 21 through the first water cooling unit connecting port 34 and the first water inlet connecting port 36, and the water return port 12 is connected to the second water port 22 through the second water cooling unit connecting port 35 and the first water outlet connecting port 38. At this time, the cooled coolant flows counterclockwise in the cooling device 20, so that the battery cell 210 is cooled to an appropriate temperature; in this process, the temperature detection unit 60 detects the temperature of the coolant at the two water ports. The battery management system 300 measures and feeds back in real time to the battery management system 300, which determines the temperature difference between the two water outlets. When the temperature difference exceeds a specific value, the battery management system 300 controls the first electromagnetic coil 31 to be powered off and the second electromagnetic coil 32 to be powered on to attract the iron core 331, so that the return water port 12 is connected to the first water port 21 through the second water cooling unit connecting port 35 and the second water outlet connecting port 39, and the water outlet 11 is connected to the second water port 22 through the first water cooling unit connecting port 34 and the second water inlet connecting port 37. At this time, the cooled coolant flows clockwise in the cooling device 20 to cool the battery cell 210. The above operation can balance the surface temperature of all battery cells 210 in the battery pack 200 and improve the service life of the battery system.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A thermal management system, characterized in that: include: Thermal management water cooling unit (10); A cooling device (20), wherein the cooling device (20) is provided with two water inlets; A reversing member (30) is arranged between the thermal management water cooling unit (10) and the cooling device (20), the reversing member (30) being connected to the water outlet (11) and the water return port (12) of the thermal management water cooling unit (10), the reversing member (30) being configured to selectively connect the water outlet (11) to one of the water ports, and connect the water return port (12) to the other water port, so as to change the circulation direction of the coolant in the cooling device (20); The reversing member (30) comprises a first electromagnetic coil (31), a second electromagnetic coil (32) and a valve body (33); the first electromagnetic coil (31) and the second electromagnetic coil (32) are respectively arranged at two ends of the valve body (33); the first electromagnetic coil (31) is configured to enable the valve body (33) to move toward the first end so that the water outlet (11) is connected to one of the water outlets; the second electromagnetic coil (32) is configured to enable the valve body (33) to move toward the second end so that the water outlet (11) is connected to the other water outlet; The valve body (33) comprises an iron core (331), a first movable valve core (332), a second movable valve core (333), a third movable valve core (334), a fourth movable valve core (335) and a fifth movable valve core (336); the first movable valve core (332), the second movable valve core (333), the third movable valve core (334), the fourth movable valve core (335) and the fifth movable valve core (336) are all arranged at intervals on the iron core (331) and are all sealed against the reversing member (30). ) so that a first water return chamber (337) is formed between the second movable valve core (333) and the third movable valve core (334), a second water return chamber (338) is formed between the first movable valve core (332) and the second movable valve core (333), a first water inlet chamber (339) is formed between the fourth movable valve core (335) and the fifth movable valve core (336), and a second water inlet chamber (340) is formed between the third movable valve core (334) and the fourth movable valve core (335); The iron core (331) is configured to drive each movable valve core to move toward the first end to connect the first water inlet chamber (339) and the first water return chamber (337); Or the iron core (331) is configured to be able to drive each movable valve core to move toward the second end to connect the second water inlet chamber (340) and the second water return chamber (338).

2. The thermal management system according to claim 1, characterized in that: The reversing member (30) is further provided with a first water cooling unit connecting port (34), a second water cooling unit connecting port (35), a first water inlet connecting port (36), a second water inlet connecting port (37), a first water outlet connecting port (38) and a second water outlet connecting port (39); the first water cooling unit connecting port (34) is connected to the water outlet (11); the second water cooling unit connecting port (35) is connected to the water return port (12); one of the water ports of the cooling device (20) is connected to the first water inlet connecting port (36) and the second water outlet connecting port (39); the other water port is connected to the second water inlet connecting port (37) and the first water outlet connecting port (38); When the valve body (33) moves toward the first end, the first water cooling unit connecting port (34) is connected to the first water inlet connecting port (36), and the second water cooling unit connecting port (35) is connected to the first water outlet connecting port (38), so that the water outlet (11) is connected to one of the water ports of the cooling device (20), and the water return port (12) is connected to the other water port of the cooling device (20); When the valve body (33) moves toward the second end, the first water cooling unit connecting port (34) is connected to the second water inlet connecting port (37), and the second water cooling unit connecting port (35) is connected to the second water outlet connecting port (39), so that the water outlet (11) is connected to the other water port of the cooling device (20), and the water return port (12) is connected to one of the water ports of the cooling device (20).

3. The thermal management system according to claim 2, characterized in that: The thermal management system further comprises a first three-way joint (40), a first end of the first three-way joint (40) being connected to one of the water ports via a pipeline, a second end being connected to the first water inlet connection port (36) via a pipeline, and a third end being connected to the second water outlet connection port (39) via a pipeline.

4. The thermal management system according to claim 3, characterized in that: The thermal management system further comprises a second three-way joint (50), a first port of the second three-way joint (50) being connected to another water port via a pipeline, a second port being connected to the second water inlet connection port (37) via a pipeline, and a third port being connected to the first water outlet connection port (38) via a pipeline.

5. The thermal management system according to any one of claims 1 to 4, characterized in that: The reversing element (30) is a reversing solenoid valve.

6. The thermal management system according to any one of claims 1 to 4, characterized in that: The thermal management system further comprises: At least two temperature detection units (60), at least one of the temperature detection units (60) being installed at each of the two water outlets of the cooling device (20).

7. The thermal management system according to any one of claims 1 to 4, characterized in that: The thermal management system further comprises at least two throttle valves (70), and each of the water outlets is provided with at least one throttle valve (70).

8. A battery system, characterized in that include: A battery pack (200), comprising a battery cell (210); According to the thermal management system according to any one of claims 1 to 7, the thermal management water cooling unit (10) is arranged outside the battery pack (200), the cooling device (20) is arranged inside the battery pack (200), and the cooling device (20) is configured to be able to exchange heat with the battery cells (210) in the battery pack (200).

9. The battery system according to claim 8, characterized in that: The battery system further comprises a battery management system (300), the battery management system (300) being electrically connected to the battery pack (200) and the thermal management system, and the battery management system (300) being configured to be able to control and monitor the battery pack (200) and the thermal management system.

Images