Thermal management assembly of battery pack, battery pack and vehicle

Abstract

The utility model relates to a heat management assembly of a battery pack, the battery pack and a vehicle, the heat management assembly of the battery pack comprises a heat exchange assembly and a detection piece, the heat exchange assembly is used for circulating a temperature adjusting medium, and the detection piece is connected to the heat exchange assembly so as to be used for detecting the change of the amount of the temperature adjusting medium in the heat exchange assembly. According to the technical scheme, the heat exchange assembly is used for circulating the temperature adjusting medium so as to perform heat exchange with a plurality of battery monomers in the battery pack through the temperature adjusting medium, so that the heating or cooling requirements of the battery monomers are met, and the detection piece can detect the change of the amount of the temperature adjusting medium in the heat exchange assembly in the use process of the heat exchange assembly; therefore, on-off control is carried out on circulation of the temperature adjusting medium in the heat exchange assembly, the amount of the temperature adjusting medium leaked into the battery pack due to leakage of the heat exchange assembly is reduced, the possibility of thermal runaway of the battery pack is reduced, and the use safety of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, in particular to a battery pack thermal management assembly, a battery pack and a vehicle. BACKGROUND

[0002] In the related art, the liquid cooling plate in the battery pack can leak due to various factors, such as corrosion or external force impact, and thus the coolant can leak into the battery pack. When the thermal management is started during the operation of the vehicle, a large amount of coolant in the entire circuit connected with the battery pack will enter the battery pack, causing short circuit of electrical components, damaging various electrical components, and even causing thermal runaway due to short circuit between battery cells. SUMMARY

[0003] The purpose of the present disclosure is to provide a battery pack thermal management assembly, a battery pack and a vehicle, which can detect the change in the amount of coolant in the battery pack in time and prevent the thermal management of the battery pack in the case of coolant leakage in the battery pack, so as to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to a first aspect of the present disclosure, a battery pack thermal management assembly is provided, comprising:

[0005] a heat exchange assembly for circulating a temperature adjusting medium; and

[0006] a detection member connected to the heat exchange assembly for detecting the change in the amount of the temperature adjusting medium in the heat exchange assembly.

[0007] Optionally, the heat exchange assembly comprises a transmission pipeline and a liquid cooling plate in communication, and the detection member is arranged on the transmission pipeline and / or the liquid cooling plate.

[0008] Optionally, the transmission pipeline is located above the liquid cooling plate, and the detection member is sealingly connected to the transmission pipeline.

[0009] Optionally, the transmission pipeline comprises an inlet pipeline and an outlet pipeline in communication with the liquid cooling plate, and at least one of the inlet pipeline and the outlet pipeline is provided with the detection member.

[0010] Optionally, the transmission pipeline comprises a first pipeline in communication with the liquid cooling plate, the first pipeline has a corner, and the detection member is arranged at the corner.

[0011] The first pipeline comprises a first pipe section and a second pipe section connected at the corner, the first pipe section is connected to the liquid cooling plate through the second pipe section, and an installation port for installing the detection member is arranged at one end of the second pipe section away from the liquid cooling plate.

[0012] Optionally, an end of the second pipe section away from the liquid cooling plate protrudes from the first pipe section and has a mounting surface, and the mounting port is arranged on the mounting surface.

[0013] Optionally, the first pipe section is parallel to a plate surface of the liquid cooling plate, and / or the second pipe section is perpendicular to the plate surface of the liquid cooling plate.

[0014] Optionally, a valve structure is arranged on the transmission pipeline for opening or closing the transmission pipeline, and the valve structure is signal connected with the detection member.

[0015] Optionally, the valve structure is configured as a normally closed valve.

[0016] The transmission pipeline includes an inlet pipeline and an outlet pipeline which are communicated with the liquid cooling plate, the valve structure includes an inlet switch valve arranged on the inlet pipeline and an outlet switch valve arranged on the outlet pipeline, and the detection member is arranged on the inlet pipeline and located between the inlet switch valve and the liquid cooling plate.

[0017] Optionally, the detection member includes a liquid level sensor and / or a pressure sensor.

[0018] According to a second aspect of the present disclosure, a battery pack is provided, comprising:

[0019] a housing;

[0020] a plurality of battery cells arranged in the housing; and

[0021] the above-mentioned thermal management assembly is at least partially arranged in the housing.

[0022] Optionally, the battery pack includes a battery management system, and the battery management system is signal connected with the detection member and a valve structure on a transmission pipeline of the heat exchange assembly.

[0023] According to a third aspect of the present disclosure, a vehicle is provided, comprising:

[0024] the above-mentioned battery pack;

[0025] a thermal management system, the thermal management system including a temperature adjustment flow path communicated with the heat exchange assembly; and

[0026] a vehicle control unit, the vehicle control unit being signal connected with the battery management system and the thermal management system, respectively.

[0027] By the technical solution, the heat exchange assembly is used to circulate the temperature adjusting medium to exchange heat with the plurality of battery monomers in the battery pack through the temperature adjusting medium, to meet the heating or cooling requirement of the battery monomers, the detection piece can detect the change of the amount of the temperature adjusting medium in the heat exchange assembly during use of the heat exchange assembly, to detect the leakage of the temperature adjusting medium, and thus to control the circulation of the temperature adjusting medium in the heat exchange assembly to reduce the amount of the temperature adjusting medium leaked into the battery pack due to leakage of the heat exchange assembly, to reduce the possibility of causing thermal runaway of the battery pack, and to improve the use safety of the battery pack.

[0028] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0030] Figure 1 is a schematic diagram of the overall structure of the battery pack provided in the exemplary embodiment of the present disclosure;

[0031] Figure 2 is Figure 1 is an enlarged schematic diagram of part A in

[0032] Figure 3 is a cross-sectional schematic diagram of the liquid inlet pipeline provided in the exemplary embodiment of the present disclosure;

[0033] Figure 4 is a control block diagram of vehicle thermal management provided in the exemplary embodiment of the present disclosure.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 10, battery pack; 101, battery management system; 20, thermal management system; 201, temperature adjusting flow path; 30, vehicle controller;

[0036] 1, heat exchange assembly; 11, transmission pipeline; 111, liquid inlet pipeline; 1111, first pipe section; 1112, second pipe section; 1113, mounting port; 1114, mounting surface; 112, liquid outlet pipeline; 113, corner; 12, liquid cooling plate; 2, detection piece; 3, valve structure; 31, liquid inlet on-off valve; 32, liquid outlet on-off valve; 4, housing; 41, first containing space; 42, second containing space; 5, battery monomer. DETAILED DESCRIPTION

[0037] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended for illustration and explanation of the present disclosure and are not intended to limit the present disclosure.

[0038] In the present disclosure, "inner, outer" refers to the inside and outside of the profile of the corresponding component, and "far, near" refers to the far and near of the spatial position of the corresponding component relative to another component. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another element, and do not have sequentiality and importance. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements, unless otherwise indicated.

[0039] According to a first aspect of the present disclosure, with reference to Figures 1 to 4 The present disclosure provides a thermal management assembly of a battery pack 10, comprising a heat exchange assembly 1 and a detection member 2, wherein the heat exchange assembly 1 is used to circulate a temperature regulating medium; and the detection member 2 is connected to the heat exchange assembly 1 to detect the change of the amount of the temperature regulating medium in the heat exchange assembly 1.

[0040] Through the above technical solution, the heat exchange assembly 1 is used to circulate the temperature regulating medium to exchange heat with the plurality of battery cells 5 in the battery pack 10 through the temperature regulating medium to meet the heating or cooling needs of the battery cells 5. The detection member 2 can detect the change of the amount of the temperature regulating medium in the heat exchange assembly 1 during the use of the heat exchange assembly 1 to detect the leakage of the temperature regulating medium, so as to control the circulation of the temperature regulating medium in the heat exchange assembly 1 to reduce the amount of the temperature regulating medium leaked into the battery pack 10 due to the leakage of the heat exchange assembly 1, reduce the possibility of causing the thermal runaway of the battery pack 10, and improve the use safety of the battery pack 10.

[0041] Specifically, before the thermal management is performed, the detection member 2 can detect the change of the amount of the temperature regulating medium in the heat exchange assembly 1. If the amount of the temperature regulating medium in the heat exchange assembly 1 does not change, the temperature regulating medium is introduced into the heat exchange assembly 1 and circulated to heat or cool the battery cells 5. If the amount of the temperature regulating medium in the heat exchange assembly 1 is detected by the detection member 2 to decrease, the temperature regulating medium in the heat exchange assembly 1 may

[0042] The temperature regulating medium can be a cooling medium commonly used in the battery pack 10, such as a cooling liquid, and the present disclosure does not make specific limitation thereon.

[0043] In some embodiments, with reference to Figure 1 and Figure 2As shown, the heat exchange assembly 1 can include a transmission pipeline 11 and a liquid cooling plate 12 in communication, so that the temperature adjusting medium flows in the transmission pipeline 11 and the liquid cooling plate 12. The detection member 2 can be arranged in the transmission pipeline 11 and / or the liquid cooling plate 12 to detect the change of the amount of the temperature adjusting medium in the transmission pipeline 11 and / or the liquid cooling plate 12, thereby monitoring whether the temperature adjusting medium in the transmission pipeline 11 and / or the liquid cooling plate 12 leaks.

[0044] In some example embodiments, referring to Figure 1 and Figure 2 As shown, the detection member 2 can be sealingly connected to the transmission pipeline 11. The temperature adjusting medium flows in the transmission pipeline 11, so that the detection end of the detection member 2 can extend into the interior of the transmission pipeline 11 to detect the change of the amount of the temperature adjusting medium in the transmission pipeline 11. The detection of the change of the amount of the temperature adjusting medium in the transmission pipeline 11 is more sensitive and accurate. In addition, a sealing member such as a sealing ring or a sealing gasket can be arranged between the detection member 2 and the transmission pipeline 11 to reduce the possibility of leakage of the temperature adjusting medium between the detection member 2 and the transmission pipeline 11 during flow.

[0045] In some embodiments, the transmission pipeline 11 is in communication with the liquid cooling plate 12 and located above the liquid cooling plate 12. When the liquid cooling plate 12 leaks, the temperature adjusting medium in the transmission pipeline 11 at the top of the liquid cooling plate 12 can quickly change in amount due to the relatively small space in the transmission pipeline 11, thereby further improving the detection sensitivity of the detection member 2, so that the detection member 2 can more accurately and timely detect whether the temperature adjusting medium in the transmission pipeline 11 and / or the liquid cooling plate 12 leaks.

[0046] It can be understood that in some other possible alternative embodiments not shown in the drawings, the detection member 2 can also be sealingly connected to the liquid cooling plate 12. For example, the detection member 2 can be mounted on the plate surface of the liquid cooling plate 12 and located above the liquid cooling plate 12, and the detection end of the detection member 2 can extend into the interior of the liquid cooling plate 12 to detect the change of the amount of the temperature adjusting medium in the liquid cooling plate 12. Alternatively, the number of detection members 2 can be multiple and arranged in the transmission pipeline 11 and the liquid cooling plate 12, respectively, and the present disclosure is not limited thereto. At this time, the sealing member can be arranged between the detection member 2 and the liquid cooling plate 12.

[0047] In some embodiments, referring to Figure 1 and Figure 2As shown, the transmission pipeline 11 can include a liquid inlet pipeline 111 and a liquid outlet pipeline 112 which are communicated with the liquid cooling plate 12, so that the liquid inlet pipeline 111 and the liquid outlet pipeline 112 are both communicated with the liquid cooling plate 12, that is, the temperature adjusting medium flows in the liquid inlet pipeline 111 and the liquid outlet pipeline 112. At least one of the liquid inlet pipeline 111 and the liquid outlet pipeline 112 is provided with the detection piece 2, so that the change of the amount of the temperature adjusting medium in the liquid inlet pipeline 111 and / or the liquid outlet pipeline 112 can be detected by the detection piece 2, so as to detect whether the temperature adjusting medium leaks.

[0048] In some embodiments, referring to Figure 1 and Figure 2 As shown, the transmission pipeline 11 includes a first pipeline which is communicated with the liquid cooling plate 12, and the first pipeline has a corner 113, and the detection piece 2 can be arranged at the corner 113. The liquid inlet pipeline 111 can be the first pipeline, and the liquid outlet pipeline 112 can also be the first pipeline. Exemplarily, the detection piece 2 can be arranged at the liquid inlet pipeline 111 or the liquid outlet pipeline 112, or the number of the detection pieces 2 can be multiple and arranged at the liquid inlet pipeline 111 and the liquid outlet pipeline 112 respectively, which is not limited in the disclosure.

[0049] Exemplarily, the disclosure arranges the detection piece 2 at the liquid inlet pipeline 111, at this time, the liquid inlet pipeline 111 is the first pipeline, referring to Figure 2 and Figure 3 As shown, the liquid inlet pipeline 111 has a corner 113, and the detection piece 2 can be arranged at the corner 113, so as to facilitate the installation of the detection piece 2 and the detection of the temperature adjusting medium, wherein the detection piece 2 can be arranged above the corner 113, or the detection piece 2 can be arranged at one side of the corner 113. In addition, in some other possible alternative embodiments which are not shown in the drawings, the liquid outlet pipeline 112 can also be the first pipeline, and the detection piece 2 can be arranged at the liquid outlet pipeline 112, similarly, the liquid outlet pipeline 112 has a corner, and the detection piece 2 can be arranged at the corner. It can be understood that the detection piece 2 can be two, one of which is arranged at the liquid inlet pipeline 111, and the other of which is arranged at the liquid outlet pipeline 112, which is not limited in the disclosure.

[0050] In addition, since the liquid inlet pipeline 111 is bent at the corner 113, thereby, when installing the detection piece 2, the installation space is larger than that at other places of the liquid inlet pipeline 111, which can facilitate the installation. Similarly, since the liquid outlet pipeline 112 is bent at the corner, thereby, when installing the detection piece 2, the installation space is larger than that at other places of the liquid outlet pipeline 112, which can facilitate the installation.

[0051] In some embodiments, referring to Figure 2 and Figure 3As shown, the inlet pipeline 111 can be a first pipeline, and the inlet pipeline 111 can include a first pipeline segment 1111 and a second pipeline segment 1112 connected at a corner 113. The first pipeline segment 1111 is connected to the liquid cooling plate 12 through the second pipeline segment 1112. An end of the second pipeline segment 1112 away from the liquid cooling plate 12 is provided with a mounting opening 1113 for mounting the detection member 2. The detection member 2 is connected to the second pipeline segment 1112 through the mounting opening 1113. For example, the detection member 2 can be connected to the second pipeline segment 1112 by means of insertion, adhesion, threaded connection, or the like. The detection end of the detection member 2 can extend into the inlet pipeline 111 through the mounting opening 1113 to detect the change in the amount of the temperature-adjusting medium in the inlet pipeline 111.

[0052] In some embodiments, referring to Figure 2 and Figure 3 As shown, the end of the second pipeline segment 1112 away from the liquid cooling plate 12 protrudes from the first pipeline segment 1111 and has a mounting surface 1114. The mounting opening 1113 is arranged on the mounting surface 1114. The protruding end and the mounting surface 1114 arranged on the second pipeline segment 1112 can facilitate the formation of the mounting opening 1113 to facilitate the mounting of the detection member 2 and enhance the mounting stability of the detection member 2 to improve the detection accuracy of the detection member 2.

[0053] In some embodiments, referring to Figure 2 and Figure 3 As shown, the first pipeline segment 1111 can be parallel to the plate surface of the liquid cooling plate 12 to reduce the occupation of the space in the battery pack 10. The second pipeline segment 1112 can be perpendicular to the plate surface of the liquid cooling plate 12. The detection member 2 can be arranged on the second pipeline segment 1112. The mounting surface 1114 can be parallel to the plate surface of the liquid cooling plate 12. The detection member 2 is located directly above the liquid cooling plate 12. The detection end of the detection member 2 extends into the second pipeline segment 1112 and extends in a direction parallel to the extending direction of the second pipeline segment 1112 to improve the timeliness and accuracy of the detection.

[0054] It can be understood that the above-mentioned extension direction of the first pipe segment 1111 and the second pipe segment 1112 is only exemplary, in some other possible alternative embodiments not shown in the drawings, the first pipe segment 1111 can be inclined downward to extend towards the liquid cooling plate 12 to facilitate the flow of the temperature adjusting medium, and the second pipe segment 1112 can be inclined downward to extend towards the liquid cooling plate 12, the angle between the second pipe segment 1112 and the vertical direction is smaller than the angle between the first pipe segment 1111 and the vertical direction, at this time, the circumferential side of the second pipe segment 1112 can be convex upward along the vertical direction to form a mounting surface 1114, the mounting surface 1114 is parallel to the plate surface of the liquid cooling plate 12, wherein the mounting port 1113 is arranged on the mounting surface 1114, and the detection end of the detection piece 2 can extend into the second pipe segment 1112 from the mounting port 1113 and the extension direction is parallel to the vertical direction. The present disclosure is not limited to this.

[0055] In some embodiments, referring to Figure 1 and Figure 2 As shown, the transmission pipeline 11 can be provided with a valve structure 3 for opening or closing the transmission pipeline 11, and the valve structure 3 is signal connected with the detection piece 2. In this way, the transmission pipeline 11 can be selectively opened or closed by the valve structure 3 to allow or prevent the temperature adjusting medium outside the battery pack 10 to flow into the battery pack 10. Exemplarily, before the heat management is performed, the detection piece 2 detects the change of the amount of the temperature adjusting medium in the heat exchange assembly 1, if the amount of the temperature adjusting medium in the heat exchange assembly 1 does not change, at this time, the detection piece 2 signals the valve structure 3 to open the transmission pipeline 11 to draw the temperature adjusting medium through the transmission pipeline 11 and flow to warm up or cool down the battery monomer 5, if the detection piece 2 detects that the amount of the temperature adjusting medium in the heat exchange assembly 1 decreases, at this time, the temperature adjusting medium in the heat exchange assembly 1 may leak, so the detection piece 2 signals the valve structure 3 to close the transmission pipeline 11 to prevent the temperature adjusting medium outside the battery pack 10 from flowing into the battery pack 10, thereby reducing the possibility of thermal runaway of the battery pack 10 and improving the use safety of the battery pack 10.

[0056] The valve structure 3 can be configured as a normally closed valve to ensure the sealing of the battery pack 10 and reduce the possibility of external temperature regulating medium entering the battery pack 10 through the transmission pipeline 11, thereby ensuring the accuracy of the detection of the change in the amount of temperature regulating medium in the heat exchange assembly 1 by the detection member 2. It can be understood that the valve structure 3 can be configured as, for example, a switch valve or a one-way valve, and the switching between the open state and the closed state can be achieved by, for example, an electromagnetic driving mode. The present disclosure does not make specific limitations in this regard. In addition, the valve structure 3 is a normally closed valve. When the battery pack 10 needs heat management, the valve structure 3 can be opened when the detection member 2 detects that the temperature regulating medium in the heat exchange assembly 1 has not leaked, so as to normally circulate the temperature regulating medium. When the detection member 2 detects that the temperature regulating medium in the heat exchange assembly 1 has leaked, the valve structure 3 remains normally closed to reject the heat management request, so as to avoid more temperature regulating medium from leaking into the battery pack 10.

[0057] In some embodiments, with reference to Figure 1 and Figure 2 As shown, the transmission pipeline 11 can include an inlet pipeline 111 and an outlet pipeline 112 connected to the liquid cooling plate 12, and the valve structure 3 can include an inlet switch valve 31 arranged on the inlet pipeline 111 and an outlet switch valve 32 arranged on the outlet pipeline 112. In this way, the inlet switch valve 31 can be used to control the opening and closing of the inlet pipeline 111, so as to allow or prevent the circulation of the temperature regulating medium.

[0058] In addition, the detection member 2 is arranged on the inlet pipeline 111 and located between the inlet switch valve 31 and the liquid cooling plate 12, and the inlet switch valve 31 and the outlet switch valve 32 remain in the normally closed state, which can reduce the possibility of external temperature regulating medium flowing back into the battery pack 10, reduce the influence on the detection process, improve the detection accuracy of the detection member 2, facilitate the detection member 2 to detect the change in the amount of temperature regulating medium in the inlet pipeline 111 and / or the liquid cooling plate 12, and improve the timeliness of the detection of the detection member 2.

[0059] In some embodiments, with reference to Figure 2 and Figure 3As shown, the detection member 2 can include a liquid level sensor and / or a pressure sensor, and the present disclosure exemplarily configures the detection member 2 as a liquid level sensor and sets it in the liquid inlet pipeline 111. The liquid level sensor can be a float type, a capacitive type, a resistance type, a pressure type, a photoelectric type sensor, etc., and the present disclosure does not make specific limitation thereon, and the purpose is to be able to detect the change of the amount of the temperature regulating medium in the heat exchange assembly 1, for example, to be able to detect the decrease of the amount of the temperature regulating medium in the heat exchange assembly 1. In addition, in some other possible alternative embodiments not shown in the drawings, the detection member 2 can also be configured as a pressure sensor, which can be connected to the inner wall of the bottom of the liquid cooling plate 12, or the pressure sensor can also be connected to the inner wall of the transmission pipeline 11, and the pressure sensor can be a piezoresistive type, a capacitive type or a strain gauge type, etc. Of course, the detection member 2 can also include a liquid level sensor and a pressure sensor to work together to improve the accuracy of the detection of the change of the amount of the temperature regulating medium. The present disclosure is not limited thereto.

[0060] According to a second aspect of the present disclosure, a battery pack 10 is provided, comprising a housing 4, a plurality of battery cells 5 and the above-mentioned heat management assembly, the plurality of battery cells 5 being arranged in the housing 4, and the heat management assembly being at least partially arranged in the housing 4, wherein the detection member 2 is arranged in the housing 4. In this way, the heat exchange assembly 1 can be used to communicate with the outside to draw and circulate the temperature regulating medium, so as to be able to exchange heat with the plurality of battery cells 5 in the battery pack 10 through the temperature regulating medium, meet the heating or cooling needs of the battery cells 5, and perform heat management on the battery pack 10. Before heat management, the change of the amount of the temperature regulating medium in the heat exchange assembly 1 needs to be detected by the detection member 2, and then heat management is performed, so as to reduce the possibility of thermal runaway of the battery pack 10 due to leakage of the heat exchange assembly 1, and ensure the use safety of the battery pack 10.

[0061] In some embodiments, reference is made to Figure 4As shown, the battery pack 10 comprises a battery management system 101, which is signal connected with the detection member 2 and the valve structure 3 on the transmission pipeline 11 of the heat exchange assembly 1. In this way, after the battery management system 101 is woken up, the change of the amount of the temperature regulating medium in the heat exchange assembly 1 can be detected by the detection member 2, for example, the amount of the temperature regulating medium in the liquid inlet pipeline 111 can be detected by the liquid level sensor, to determine whether the liquid level of the temperature regulating medium in the liquid inlet pipeline 111 is lowered, and if the liquid level is lowered, an alarm signal is sent out, and the heat management request is prohibited to avoid the heat management when the temperature regulating medium in the heat exchange assembly 1 leaks, which causes a large amount of external temperature regulating medium to enter the battery pack 10. If the liquid level is not lowered, the heat management request is not limited, and if the heat management is needed, the valve structure 3 can be opened to keep the heat exchange assembly 1 in communication with the outside, so that the temperature regulating medium can flow to meet the temperature regulating needs of the battery pack 10. Wherein, the battery management system 101 (BMS) can adopt the conventional battery management system in the battery pack in the prior art, and the present disclosure will not be repeated here.

[0062] In some embodiments, reference is made to Figure 1 As shown, the inside of the shell 4 is formed with a first containing space 41 and a second containing space 42, for example, the inside of the shell 4 can be divided into the first containing space 41 and the second containing space 42 by setting a partition plate, wherein the plurality of battery monomers 5 can be arranged in the first containing space 41, and the battery management system 101, the detection member 2 and the valve structure 3 can be arranged in the second containing space 42, so as to functionally divide the structures in the battery pack 10, reasonably utilize the space and improve the integration. In addition, separating the battery monomers 5 from the battery management system 101, the detection member 2 and the valve structure 3 can improve the use safety of the battery monomers 5.

[0063] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned battery pack 10, heat management system 20 and vehicle controller 30, wherein the heat management system 20 comprises a temperature regulating flow path 201 in communication with the heat exchange assembly 1, and the vehicle controller 30 is signal connected with the battery management system 101 and the heat management system 20, respectively.

[0064] The disclosure exemplarily describes the working process of the thermal management of the battery pack 10, for example, when the vehicle is charging or driving, the detection piece 2 detects the liquid level when the thermal management is requested, and feeds back to the battery management system 101, the battery management system 101 judges whether the liquid level of the temperature regulating medium in the heat exchange assembly 1 is decreased, if the liquid level is not decreased, the battery management system 101 signals the valve structure 3 to open, and then transmits a signal to the thermal management system 20 through the vehicle controller 30, the external temperature regulating medium is transmitted to the heat exchange assembly 1 through the temperature regulating flow path 201 and exchanges heat with the battery monomer 5 inside the battery pack 10. If the liquid level of the temperature regulating medium in the heat exchange assembly is detected to be decreased when the thermal management is requested, the battery management system 101 signals the valve structure 3 to remain in a closed state, prohibits the thermal management request, and sends an alarm signal.

[0065] Among them, the thermal management system 20 can adopt the existing thermal management system, for example, including air compression, evaporator, condenser, pump and other conventional structures, which can provide the temperature regulating medium to the heat exchange assembly 1 of the battery pack 10, and the disclosure will not be described here.

[0066] The preferred embodiments of the disclosure are described in detail above in combination with the drawings, but the disclosure is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the disclosure within the technical concept of the disclosure, and these simple modifications all belong to the protection scope of the disclosure.

[0067] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the disclosure will not further describe various possible combination manners.

[0068] In addition, various different embodiments of the disclosure can also be combined in any manner, as long as it does not deviate from the idea of the disclosure, it should also be considered as disclosed by the disclosure.

Claims

1. A thermal management assembly for a battery pack, the thermal management assembly comprising: The application relates to a heat exchange assembly for circulating a temperature adjusting medium, comprising a transmission pipeline and a liquid cooling plate in communication, wherein the transmission pipeline comprises a first pipeline in communication with the liquid cooling plate, and the first pipeline has a corner; and a detection member arranged at the corner and used for detecting the change of the amount of the temperature adjusting medium in the heat exchange assembly. The transmission pipeline is located above the liquid cooling plate, and the detection member is sealingly connected to the transmission pipeline. The transmission pipeline comprises an inlet pipeline and an outlet pipeline in communication with the liquid cooling plate, and at least one of the inlet pipeline and the outlet pipeline is provided with the detection member. The first pipeline comprises a first pipeline section and a second pipeline section connected at the corner, the first pipeline section is connected to the liquid cooling plate through the second pipeline section, and the second pipeline section is provided with a mounting port for mounting the detection member at an end away from the liquid cooling plate.

2. The thermal management assembly of the battery pack of claim 1, wherein, The end of the second pipeline section away from the liquid cooling plate protrudes from the first pipeline section and has a mounting surface, and the mounting port is arranged on the mounting surface.

3. The thermal management assembly of the battery pack of claim 1, wherein, The first pipeline section is parallel to the plate surface of the liquid cooling plate, and / or the second pipeline section is perpendicular to the plate surface of the liquid cooling plate.

4. The thermal management assembly of the battery pack of claim 1, wherein, A valve structure is arranged on the transmission pipeline and used for opening or closing the transmission pipeline, and the valve structure and the detection member are signal connected.

5. The thermal management assembly of the battery pack of claim 4, wherein, The valve structure is configured as a normally closed valve.

6. The thermal management assembly of the battery pack of claim 4, wherein, The transmission pipeline comprises an inlet pipeline and an outlet pipeline in communication with the liquid cooling plate, the valve structure comprises an inlet switch valve arranged on the inlet pipeline and an outlet switch valve arranged on the outlet pipeline, and the detection member is arranged on the inlet pipeline and located between the inlet switch valve and the liquid cooling plate.

7. The thermal management assembly of the battery pack of claim 1, wherein, The detection member comprises a liquid level sensor and / or a pressure sensor.

8. The thermal management assembly of the battery pack of claim 7, wherein, The application relates to a battery pack, comprising: a housing; 9. The thermal management assembly of the battery pack of any of claims 1-8, wherein, a plurality of battery monomers arranged in the housing; and 10. A battery pack, characterized by, a heat management assembly according to any one of claims 1-9, which is at least partially arranged in the housing. The battery pack comprises a battery management system, and the battery management system is signal connected with the detection member and the valve structure on the transmission pipeline of the heat exchange assembly. The application relates to a battery pack, comprising: the battery pack according to claim 10 or 11; a heat management system, wherein the heat management system comprises a temperature adjusting flow path in communication with the heat exchange assembly; and 11. The battery pack of claim 10, wherein, a vehicle control unit, wherein the vehicle control unit is signal connected with the battery management system and the heat management system respectively.

12. A vehicle characterized by comprising: ​ ​ ​ ​ ​

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