Pressure regulation and thermal management system, battery module and electric device

Abstract

Provided in the present application are a pressure regulation and thermal management system, a battery module (100) and an electric device. The pressure regulation and thermal management system comprises: a housing (101) and a plurality of hydraulic heat exchange plates (103), wherein the housing (101) is provided with a mounting cavity (1013), and the hydraulic heat exchange plates (103) are arranged in the mounting cavity (1013) and divide the mounting cavity (1013) into accommodating spaces for accommodating battery cells (102). The hydraulic heat exchange plates (103) are suitable for heat exchange through contact with the battery cells (102), and are suitable for controlled deformation, thus adjusting the constraining force exerted by the hydraulic heat exchange plates (103) on the battery cells (102).

Description

Pressure regulation and thermal management system, battery module and electric device

[0001] The present application claims priority to the Chinese patent application No. 202411093172.8, filed on August 08, 2024, and entitled "Pressure regulation and thermal management system, battery module and electric device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of vehicles, and particularly relates to a pressure regulation and thermal management system, a battery module and an electric device. BACKGROUND

[0003] With the continuous development of the new energy industry, solid-state battery modules have attracted widespread attention due to their high thermal stability, energy density and the absence of liquid leakage. A solid-state battery module generally includes a shell and a plurality of battery cells tightly stacked in the shell. The shell can constrain the battery cells, which is conducive to improving the working reliability of the solid-state battery module.

[0004] However, due to the repeated expansion and contraction of the battery cells during charging and discharging, the shell may deform and age after being used for a period of time, which can cause the constraint force on the battery cells to be severely attenuated, thereby affecting the working reliability of the solid-state battery module. SUMMARY

[0005] The present application aims to provide a pressure regulation and thermal management system, a battery module and an electric device to solve the problem that the constraint force on the battery cells is severely attenuated after the existing battery module is used for a period of time, affecting the working reliability of the battery module.

[0006] To solve the above technical problems, the present application is implemented as follows:

[0007] In a first aspect, the present application discloses a pressure regulation and thermal management system, comprising: a shell and a plurality of hydraulic heat exchange plates.

[0008] The shell has a mounting cavity, and the hydraulic heat exchange plates are arranged in the mounting cavity and divide the mounting cavity into a receiving space for receiving battery cells.

[0009] The hydraulic heat exchange plates are adapted to contact and exchange heat with the battery cells and are adapted to be controlled to deform to regulate the constraint force exerted by the hydraulic heat exchange plates on the battery cells.

[0010] Optionally, the hydraulic heat exchange plates are provided with accommodating cavities containing heat exchange medium.

[0011] The pressure regulating and thermal management system further comprises a booster pump in communication with the containing cavity, the booster pump being configured to regulate the pressure of the heat exchange medium in the containing cavity to deform the hydraulic heat exchange plate.

[0012] Optionally, the battery cell comprises a first side wall perpendicular to the first direction, the first side wall being the largest wall of the battery cell in area;

[0013] The first side wall is in abutment with the hydraulic heat exchange plate, and the normal projection of the containing cavity covers the normal projection of the first side wall in a plane perpendicular to the first direction along the first direction.

[0014] Optionally, the hydraulic heat exchange plate extends along a second direction perpendicular to the first direction, and the hydraulic heat exchange plate further comprises an inlet and an outlet, the inlet being configured to communicate with the booster pump;

[0015] The inlet and the outlet are arranged at both ends of the hydraulic heat exchange plate along the second direction and are in communication with the containing cavity, the inlet being configured to allow the heat exchange medium to flow into the containing cavity, and the outlet being configured to allow the heat exchange medium to flow out of the containing cavity.

[0016] Optionally, the pressure regulating and thermal management system further comprises an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe being configured to communicate with a heat exchange device to circulate the heat exchange medium;

[0017] The inlets of the plurality of hydraulic heat exchange plates are in communication with the inlet pipe, and the outlets of the plurality of hydraulic heat exchange plates are in communication with the outlet pipe.

[0018] Optionally, the pressure regulating and thermal management system further comprises an inlet pipe, an outlet pipe, and an adapter pipe;

[0019] The inlet pipe and the outlet pipe are in communication with the inlet of one of the two outermost hydraulic heat exchange plates and the outlet of the other one of the two outermost hydraulic heat exchange plates, respectively, and the adapter pipe is in communication with the inlet of one of the two adjacent hydraulic heat exchange plates and the outlet of the other one of the two adjacent hydraulic heat exchange plates, respectively.

[0020] Optionally, the hydraulic heat exchange plate is a stainless steel hydraulic heat exchange plate.

[0021] Optionally, the pressure regulating and thermal management system further comprises a constraint frame;

[0022] The constraint frame is arranged between the battery cell and the shell and is in abutment with at least part of the battery cell and the shell, respectively, to constrain the battery cell.

[0023] Optionally, the shell comprises two first side plates and a second side plate;

[0024] Two of the first side plates are oppositely arranged along a first direction, and two of the second side plates are arranged between the two first side plates to form the mounting cavity together with the first side plates;

[0025] The first side plate and the second side plate have a connection portion in a rounded transition shape.

[0026] Optionally, the pressure regulation and thermal management system further comprises two end plates.

[0027] The two end plates are arranged in the mounting cavity along the first direction and are spaced apart, and one of the end plates abuts one of the first side plates.

[0028] The end plate has an edge portion close to the connection portion, and the edge portion is in a rounded transition shape.

[0029] Optionally, the pressure regulation and thermal management system further comprises a partition plate.

[0030] The partition plate is arranged on a side of the end plate away from the first side plate, and the partition plate is used for heat insulation.

[0031] Optionally, the pressure regulation and thermal management system further comprises a heat exchange device and a booster pump.

[0032] The heat exchange device, the booster pump, and the hydraulic heat exchange plate are connected by pipelines to form a heat exchange medium circulation loop, the heat exchange device is used for adjusting the temperature of the heat exchange medium in the hydraulic heat exchange plate, and the booster pump is used for adjusting the pressure of the heat exchange medium in the hydraulic heat exchange plate.

[0033] Optionally, the pressure regulation and thermal management system further comprises a controller, a temperature sensor, and a pressure sensor.

[0034] The temperature sensor and the pressure sensor are arranged on the pipeline and are respectively in communication connection with the controller, the temperature sensor is used for acquiring temperature information of the heat exchange medium, and the pressure sensor is used for acquiring pressure information of the heat exchange medium.

[0035] The controller controls the heat exchange device to adjust the temperature of the heat exchange medium based on the temperature information, and controls the booster pump to adjust the pressure of the heat exchange medium based on the pressure information.

[0036] Optionally, the heat exchange device comprises a circulating pump, a heat exchanger, and a heater connected in sequence, and the heater is close to the booster pump.

[0037] The circulating pump is used to provide power for circulation of the heat exchange medium, the heater is used to heat the heat exchange medium, and the heat exchanger is used to be connected with an external liquid supply device.

[0038] In a second aspect, the application also discloses a battery module, comprising the pressure regulating and thermal management system and a plurality of battery cells.

[0039] In a third aspect, the application also discloses a power consumption device, comprising the battery module.

[0040] In the embodiments of the application, the hydraulic heat exchange plate is arranged to be in contact with the battery cell for heat exchange and to be deformed under control. In this way, by deforming the hydraulic heat exchange plate, the change of the constraint force during use of the battery module can be coped with, so that the constraint force applied to the battery cell can be continuously and stably maintained in a suitable range, which is beneficial to improving the working reliability of the battery module. In addition, the hydraulic heat exchange plate can also exchange heat with the battery cell, so that the cooling or heating of the battery cell can be realized at the same time.

[0041] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0042] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0043] Fig. 1 is a structural schematic diagram of a solid-state battery module according to an embodiment of the application;

[0044] Fig. 2 is a structural schematic diagram of a solid-state battery module according to an embodiment of the application;

[0045] Fig. 3 is a structural schematic diagram of a solid-state battery module according to an embodiment of the application;

[0046] Fig. 4 is a structural schematic diagram of a solid-state battery module according to an embodiment of the application;

[0047] Fig. 5 is a partial enlarged view of position A in Fig. 4;

[0048] Fig. 6 is a structural schematic diagram of a hydraulic heat exchange plate according to an embodiment of the application;

[0049] Fig. 7 is a structural schematic diagram of a shell according to an embodiment of the application;

[0050] Fig. 8 is a structural schematic diagram of a constraint frame according to an embodiment of the application;

[0051] Fig. 9 is a structural schematic diagram of a liquid inlet pipe according to an embodiment of the application;

[0052] FIG. 10 is a structural schematic diagram of a liquid outlet pipe according to an embodiment of the present application;

[0053] FIG. 11 is a structural schematic diagram of an end plate according to an embodiment of the present application;

[0054] FIG. 12 is a structural schematic diagram of parallel arrangement of hydraulic heat exchange plates according to an embodiment of the present application;

[0055] FIG. 13 is a structural schematic diagram of parallel arrangement of hydraulic heat exchange plates according to an embodiment of the present application;

[0056] FIG. 14 is a schematic diagram of parallel arrangement of hydraulic heat exchange plates according to an embodiment of the present application;

[0057] FIG. 15 is a structural schematic diagram of series arrangement of hydraulic heat exchange plates according to an embodiment of the present application;

[0058] FIG. 16 is a structural schematic diagram of series arrangement of hydraulic heat exchange plates according to an embodiment of the present application;

[0059] FIG. 17 is a schematic diagram of series arrangement of hydraulic heat exchange plates according to an embodiment of the present application;

[0060] FIG. 18 is a schematic diagram of a pressure regulation and thermal management system according to an embodiment of the present application;

[0061] FIG. 19 is a schematic diagram of another series arrangement of hydraulic heat exchange plates according to an embodiment of the present application;

[0062] FIG. 20 is a schematic diagram of another pressure regulation and thermal management system according to an embodiment of the present application.

[0063] FIG. 20 is a schematic diagram of another pressure regulation and thermal management system according to an embodiment of the present application. DETAILED DESCRIPTION

[0064] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0065] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0066] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] Generally speaking, for solid-state battery modules, insufficient constraint force will have the following effects:

[0069] 1) Electrolyte structure is unstable: if the electrolyte cannot be supported and constrained enough, its crystal structure may change, leading to a decrease in electrolyte performance, and even possibly causing internal short circuits in the electrolyte;

[0070] 2) Lithium ion migration is blocked: when the constraint force is insufficient, lithium ions in the electrolyte may be blocked during migration, reducing the charge and discharge efficiency of the battery, and even causing the battery to malfunction;

[0071] 3) Increased battery internal resistance: insufficient constraint force can also cause poor contact between the positive and negative electrodes and the electrolyte, increasing the internal resistance of the battery and further affecting the charge and discharge performance of the battery;

[0072] 4) Increased safety risks: insufficient constraint force can make the solid-state battery module more susceptible to external impact or vibration during operation, increasing the risk of battery leakage, short circuit, and other safety issues;

[0073] 5) Shortened battery life: long-term operation under insufficient constraint force can quickly degrade the performance of the solid-state battery module, resulting in a shortened battery life.

[0074] Therefore, it is crucial to provide a consistent and stable constraint force to the battery cells during the use of the solid-state battery module.

[0075] The pressure regulation and thermal management system provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0076] Referring to FIGS. 1-4, a structural schematic diagram of a solid-state battery module provided by the embodiments of the present application is shown. Referring to FIG. 5, a partial enlarged view of position A in FIG. 4 is shown. Referring to FIGS. 6-11, structural schematic diagrams of a hydraulic heat exchange plate, a shell, a constraint frame, an inlet pipe, an outlet pipe, and an end plate provided by the embodiments of the present application are shown, respectively. Referring to FIGS. 12-13, structural schematic diagrams of a parallel arrangement of hydraulic heat exchange plates provided by the embodiments of the present application are shown. Referring to FIG. 14, a principle schematic diagram of a parallel arrangement of hydraulic heat exchange plates provided by the embodiments of the present application is shown. Referring to FIGS. 15-16, structural schematic diagrams of a series arrangement of hydraulic heat exchange plates are shown. Referring to FIG. 17, a principle schematic diagram of a series arrangement of hydraulic heat exchange plates provided by the embodiments of the present application is shown. Referring to FIG. 18, a principle schematic diagram of a pressure regulation and thermal management system provided by the embodiments of the present application is shown. Referring to FIG. 19, a principle schematic diagram of another series arrangement of hydraulic heat exchange plates provided by the embodiments of the present application is shown. Referring to FIG. 20, a principle schematic diagram of another pressure regulation and thermal management system provided by the embodiments of the present application is shown.

[0077] To simultaneously achieve heat exchange and constraint of the battery cells in the battery module, the battery module of the embodiments of the present application includes a pressure regulation and thermal management system adapted to regulate the temperature and constraint force of the battery cells. It should be noted that the battery module can be a solid-state battery module or a battery module with electrolyte, and the following description takes the solid-state battery module as an example, and the battery module with electrolyte can be adjusted accordingly.

[0078] As shown in FIGS. 1-5, the application provides a pressure regulation and thermal management system, comprising: a shell 101 and a plurality of hydraulic heat exchange plates 103; the shell 101 has a mounting cavity 1013, the hydraulic heat exchange plates 103 are arranged in the mounting cavity 1013 and divide the mounting cavity 1013 into a receiving space for accommodating the battery cells 102; wherein the hydraulic heat exchange plates 103 are adapted to contact and exchange heat with the battery cells 102, and are adapted to be controlled to deform to adjust the restraining force applied by the hydraulic heat exchange plates 103 to the battery cells 102.

[0079] In the embodiments of the application, since the hydraulic heat exchange plates 103 are arranged, the hydraulic heat exchange plates 103 are adapted to contact and exchange heat with the battery cells 102, and are adapted to be controlled to deform. In this way, through the deformation of the hydraulic heat exchange plates 103, the change of the restraining force during the use of the solid-state battery module 100 can be coped with, so that the restraining force applied to the battery cells 102 can be continuously and stably maintained in a suitable range, which is beneficial to improve the working reliability of the solid-state battery module 100. In addition, since the hydraulic heat exchange plates 103 can also exchange heat with the battery cells 102, the cooling or heating of the battery cells 102 can be realized at the same time.

[0080] It should be noted that the deformation of the hydraulic heat exchange plates 103 is mainly swelling deformation. In order to reliably constrain each battery cell 102 in the shell 101, a restraining force needs to be applied to both sides of each battery cell 102 along the first direction X. Based on this, each battery cell 102 should be provided with one hydraulic heat exchange plate 103 on both sides along the first direction X, wherein two adjacent battery cells 102 can share one hydraulic heat exchange plate 103. In addition, the first direction X of the embodiments of the application refers to the length direction of the shell 101, and the second direction Y refers to the width direction of the shell 101.

[0081] Further, the hydraulic heat exchange plate 103 is provided with a containing cavity 1031 containing a heat exchange medium; the pressure regulation and thermal management system further comprises: a booster pump 500, the booster pump 500 is in communication with the containing cavity 1031, and the booster pump 500 is used to adjust the pressure of the heat exchange medium in the containing cavity 1031 to make the hydraulic heat exchange plate 103 deform. In this way, by adjusting the operating parameters of the booster pump 500, the pressure of the heat exchange medium in the containing cavity 1031 can be adjusted to make the hydraulic heat exchange plate 103 adaptively swell and deform, so that the change of the restraining force during the use of the solid-state battery module can be effectively coped with.

[0082] In one of the embodiments, the hydraulic heat exchange plate 103 is flat, and includes two stamping-welded plate bodies which enclose the accommodating cavity 1031. The plate bodies are metal sheets, and the hydraulic heat exchange plate 103 can withstand a pressure of 100 MPa or below. Further, the hydraulic heat exchange plate 103 can be a stainless steel hydraulic heat exchange plate 103. The stainless steel material has excellent heat conduction performance, which can improve the heat exchange efficiency between the hydraulic heat exchange plate 103 and the battery cell 102. In addition, the stainless steel material has high strength, can withstand a large pressure, effectively avoids cracking and other problems during use, and is beneficial to improving the service life of the hydraulic heat exchange plate 103. In addition, the heat exchange medium needs to meet the characteristics of insulation, high boiling point, flame retardation, non-corrosion, stability, low viscosity, high specific heat, etc. For example, the heat exchange medium can be water, ethylene glycol, hydraulic oil, which is not limited herein, and can be adjusted according to actual needs by those skilled in the art.

[0083] In some optional embodiments of the present application, the battery cell 102 includes a first side wall 1021 perpendicular to the first direction X, and the first side wall 1021 is the largest wall of the battery cell 102. The first side wall 1021 is in abutment with the hydraulic heat exchange plate 103, and the normal projection of the accommodating cavity 1031 covers the normal projection of the first side wall 1021 in a plane perpendicular to the first direction X.

[0084] In the embodiments of the present application, on the one hand, since the first side wall 1021 is the largest wall of the battery cell 102, and the first side wall 1021 is in abutment with the hydraulic heat exchange plate 103. In this way, the heat exchange contact area between the hydraulic heat exchange plate 103 and the battery cell 102 can be increased, so as to improve the heat exchange efficiency, which is beneficial to improving the temperature uniformity of the battery cell 102, so that the battery cell 102 can continuously and stably work in a suitable temperature range. On the other hand, since the normal projection of the accommodating cavity 1031 covers the normal projection of the first side wall 1021 in a plane perpendicular to the first direction X, the entire first side wall 1021 of the battery cell 102 can be uniformly stressed, which is beneficial to improving the constraint reliability of the battery cell 102.

[0085] It should be noted that the "normal projection of the accommodating cavity 1031" in the embodiments of the present application refers to a region enclosed by a closed or non-closed curve obtained by the inner wall of the plate body of the accommodating cavity 1031 in a plane perpendicular to the first direction X.

[0086] In some optional embodiments of the present application, as shown in FIG. 6, the hydraulic heat exchange plate 103 extends along a second direction Y, which is perpendicular to the first direction X, and further comprises: a liquid inlet 1032 and a liquid outlet 1033, the liquid inlet 1032 being configured to communicate with the booster pump 500; the liquid inlet 1032 and the liquid outlet 1033 being arranged at both ends of the hydraulic heat exchange plate 103 along the second direction Y and communicating with the containing cavity 1031, the liquid inlet 1032 being configured to allow the heat exchange medium to flow into the containing cavity 1031, and the liquid outlet 1033 being configured to allow the heat exchange medium to flow out of the containing cavity 1031. As shown in FIG. 7, the shell 101 is provided with openings at both ends along the second direction Y, which facilitates the assembly with other devices when the liquid inlet 1032 and the liquid outlet 1033 are arranged at both ends of the hydraulic heat exchange plate 103 along the second direction Y.

[0087] It should be noted that the present application does not limit the number of liquid inlets 1032 and liquid outlets 1033, and those skilled in the art can adjust them according to actual needs. In one embodiment, one hydraulic heat exchange plate 103 is provided with one liquid inlet 1032 and one liquid outlet 1033, and the liquid inlet 1032 and the liquid outlet 1033 are located at the diagonal positions of the hydraulic heat exchange plate 103, which can reduce the possibility of vortex formation of the heat exchange medium in the hydraulic heat exchange plate 103, thereby improving the flow stability of the heat exchange medium and facilitating the improvement of heat exchange efficiency.

[0088] In actual application, a plurality of hydraulic heat exchange plates 103 can be arranged in parallel or in series. The specific structures of the above two arrangement modes are described below in conjunction with FIGS. 12 to 17.

[0089] As shown in FIGS. 12 to 14, the pressure regulating and thermal management system further comprises: a liquid inlet pipe 107 and a liquid outlet pipe 108, the liquid inlet pipe 107 and the liquid outlet pipe 108 being configured to communicate with the heat exchange device to realize the circulation of the heat exchange medium; the liquid inlets 1032 of the plurality of hydraulic heat exchange plates 103 all communicate with the liquid inlet pipe 107, and the liquid outlets 1033 of the plurality of hydraulic heat exchange plates 103 all communicate with the liquid outlet pipe 108. In this way, the heat exchange medium flowing out after heat exchange in the heat exchange device can enter the liquid inlet pipe 107 and be distributed to the containing cavities 1031 of the respective hydraulic heat exchange plates 103, and after heat exchange, the heat exchange medium in the containing cavities 1031 of the respective hydraulic heat exchange plates 103 converges to the liquid outlet pipe 108 and then flows to the heat exchange device for heat exchange, thereby completing a cycle. At the same time, since the heat exchange medium has a certain pressure, the hydraulic heat exchange plate 103 can expand to provide sufficient restraint force.

[0090] It should be noted that, as shown in FIGS. 9-10, the liquid inlet pipe 107 is provided with a liquid inlet interface 1071 for communicating with the liquid outlet end of the heat exchange device and a plurality of first connecting interfaces, one of which is connected to one of the liquid inlet ports 1032. The liquid outlet pipe 108 is provided with a liquid outlet interface 1081 for communicating with the liquid inlet end of the heat exchange device and a plurality of second connecting interfaces, one of which is connected to one of the liquid outlet ports 1033.

[0091] As shown in FIGS. 15-17, the pressure regulating and thermal management system further comprises a liquid inlet pipe 107, a liquid outlet pipe 108, and an adapter pipe 109, the liquid inlet pipe 107 and the liquid outlet pipe 108 respectively communicating with the liquid inlet port 1032 and the liquid outlet port 1033 of one of the two outermost hydraulic heat exchange plates 103, and the adapter pipe 109 respectively communicating with the liquid inlet port 1032 and the liquid outlet port 1033 of one of the two adjacent hydraulic heat exchange plates 103. In this way, the heat exchange medium flowing out after heat exchange in the heat exchange device can enter the liquid inlet pipe 107 and flow through each hydraulic heat exchange plate 103 in sequence along an S-shaped path to achieve heat exchange between the hydraulic heat exchange plate 103 and the battery cell 102, and then flow from the liquid outlet pipe 108 to the heat exchange device for heat exchange, thereby completing a cycle. At the same time, due to the certain pressure of the heat exchange medium, the hydraulic heat exchange plate 103 can expand to provide sufficient restraint force.

[0092] It should be noted that the adapter pipe 109 is usually provided with a plurality of adapter pipes, and the specific number of the adapter pipe 109 is not limited in the embodiments of the present application, and can be adjusted by those skilled in the art according to the actual situation. In addition, the liquid inlet pipe 107, the liquid outlet pipe 108, and the adapter pipe 109 of the embodiments of the present application include but are not limited to metal pipes and can withstand a pressure of 100 MPa or less.

[0093] In actual application, the parallel mode has the advantages of low flow resistance, large flow, high heat exchange efficiency, and good temperature uniformity of the battery cell 102, but the flow pipe manufacturing process is complex and has high precision requirements, and the module stacking precision requirement is also extremely high. The series mode has good assembly, but the flow resistance is high, the flow is low, the heat exchange efficiency is low, and the temperature uniformity of the battery cell 102 is poor. Those skilled in the art can select according to actual needs.

[0094] In some optional embodiments of the present application, as shown in FIG. 8, the pressure regulating and thermal management system further comprises a restraint frame 104, which is arranged between the battery cell 102 and the shell 101 and abuts at least part of the battery cell 102 and the shell 101 to constrain the battery cell 102.

[0095] In the embodiment of the present application, since the constraint frame 104 is arranged, the edge of the battery cell 102 can be constrained by the abutment of the constraint frame 104 with the battery cell 102 and the shell 101 respectively, so that the structural damage of the positive and negative materials and the electrolyte of the edge of the battery cell 102 during the use of the solid-state battery module 100 can be avoided.

[0096] In actual application, the battery cell 102 adopts an aluminum-plastic film packaging process, and the battery cell 102 is provided with a tab 1022 at each end along the second direction Y. In order to avoid the tab 1022, each battery cell 102 is usually provided with two constraint frames 104 arranged opposite to each other along the first direction X. As shown in FIG. 8, the constraint frame 104 includes a frame body 1041 and two support portions 1042 arranged at both ends of the frame body 1041 along the second direction Y, the frame body 1041 is arranged in the circumferential direction of the battery cell 102, and the end of the support portion 1042 away from the frame body 1041 is formed with a support surface, which can support the tab 1022 for welding, thereby facilitating the welding reliability of the tab 1022. In addition, the solid-state battery module 100 further includes a positive electrode lead 110, a negative electrode lead 111 and a protective cover 112, wherein the tabs 1022 of the plurality of battery cells 102 are connected in series and electrically connected to the positive electrode lead 110 and the negative electrode lead 111 to realize the current transmission of the solid-state battery module 100. The protective cover 112 is arranged at both ends of the shell 101 along the second direction Y to shield the tabs 1022 of the battery cells 102, thereby facilitating the protection of the tabs 1022.

[0097] In some optional embodiments of the present application, as shown in FIG. 7, the shell 101 includes two first side plates 1011 and two second side plates 1012, the two first side plates 1011 are arranged opposite to each other along the first direction X, and the two second side plates 1012 are arranged between the two first side plates 1011 to form an installation cavity 1013 with the first side plates 1011. The first side plate 1011 and the second side plate 1012 have a connection portion, and the connection portion is in a round corner transition shape.

[0098] As shown in FIG. 7, the shell 101 of the embodiment of the present application is in a rectangular parallelepiped shape, and by arranging the connection portion of the first side plate 1011 and the second side plate 1012 in a round corner transition shape, the stress concentration at the connection portion can be avoided, thereby facilitating the overall structural strength of the shell 101, and thus assisting in constraining the battery cell 102 located in the installation cavity 1013.

[0099] It should be noted that the shell 101 is usually a thin-walled shell 101, which can be made of aluminum alloy, titanium alloy, high-strength steel, stainless steel and other metal materials, or can be made of reinforced composite materials such as wound glass fiber, carbon fiber and aramid fiber. The material and thickness of the shell 101 are not limited in the present application, and can be flexibly adjusted according to the strength design requirements by those skilled in the art.

[0100] In some optional embodiments of the present application, as shown in FIG. 11, the pressure regulation and thermal management system further comprises: two end plates 105; the two end plates 105 are arranged in the mounting cavity 1013 along the first direction X and abut against one first side plate 1011; the end plate 105 has an edge portion 1051 close to the connecting portion, and the edge portion 1051 is in a round corner transition shape.

[0101] In the embodiments of the present application, by setting the edge portion 1051 of the end plate 105 in a round corner transition shape, on the one hand, the end plate 105 can better adapt to the shell 101, so that the end plate 105 and the shell 101 are tightly fitted together, which is conducive to improving the overall structural strength of the solid-state battery module 100. On the other hand, the expansion force of the battery cell 102 and / or the hydraulic heat exchange plate 103 can be smoothly and uniformly transmitted to the shell 101.

[0102] It should be noted that the end plate 105 can be a metal end plate 105, which can be processed by extruded aluminum profiles, rolled steel profiles or computer numerical control processing. In addition, on the basis of meeting the structural strength, the end plate 105 can be provided with weight reduction holes, and in one embodiment, a plurality of weight reduction holes are provided, which are all arranged along the second direction Y and spaced apart from each other, so as to realize the lightweight of the solid-state battery module 100.

[0103] In some optional embodiments of the present application, the pressure regulation and thermal management system further comprises: a partition plate 106; the partition plate 106 is arranged on the side of the end plate 105 away from the first side plate 1011, and the partition plate 106 is used for isolating heat.

[0104] In actual application, since the end plate 105 and the shell 101 are usually made of metal, when the end plate 105 directly contacts the battery cell 102 or the hydraulic heat exchange plate 103, the heat generated by the battery cell 102 or the hydraulic heat exchange plate 103 is easy to diffuse to the outside of the shell 101 through the end plate 105 and the shell 101, thereby affecting the normal use of the battery cell 102 located in other shells 101. Based on this, by arranging the partition plate 106 on the side of the end plate 105 away from the first side plate 1011, that is, between the end plate 105 and the battery cell 102 or the hydraulic heat exchange plate 103, the partition plate 106 can effectively isolate heat and avoid heat diffusion. It should be noted that the partition plate 106 is usually made of insulating and low thermal conductive material, including but not limited to polyimide, polyolefin, polyester, etc.

[0105] The following provides an assembly example of the solid-state battery module 100: first, stack in the order of "hydraulic heat exchange plate 103-constraint frame 104-battery cell 102-constraint frame 104-hydraulic heat exchange plate 103", form a battery cell 102 stack; then, set the baffle 106 and the end plate 105 in sequence at both ends of the battery cell 102 stack respectively, and insert them into the shell 101 together; secondly, the battery cell 102 tab 1022 is welded in series, and the accessories such as the liquid inlet pipe 107, the liquid outlet pipe 108, the positive electrode lead-out 110, the negative electrode lead-out 111, the sampling component and the protective cover 112 are assembled, thus the assembly of the solid-state battery module 100 is completed.

[0106] In some optional embodiments of the present application, as shown in FIG. 18, the pressure regulation and thermal management system further comprises: a heat exchange device and a booster pump 500; the heat exchange device, the booster pump 500 and the hydraulic heat exchange plate 103 are connected by pipelines to form a heat exchange medium circulation loop, the heat exchange device is used to adjust the temperature of the heat exchange medium in the hydraulic heat exchange plate 103, and the booster pump 500 is used to adjust the pressure of the heat exchange medium in the hydraulic heat exchange plate 103.

[0107] In the embodiments of the present application, since the heat exchange device is provided, the temperature of the heat exchange medium can be adjusted by the heat exchange device, so that the cooling or heating of the battery cell 102 can be realized, and the battery cell 102 can be continuously and stably maintained in the appropriate temperature range for work. Since the booster pump 500 is provided, the pressure of the heat exchange medium can be adjusted by the booster pump 500, the hydraulic heat exchange plate 103 can be adaptively deformed, and the change of the constraint force during the use of the solid-state battery module 100 can be coped with, so that the constraint force applied to the battery cell 102 can be continuously and stably maintained in the appropriate range.

[0108] Further, the heat exchange device comprises: a circulating pump 200, a heat exchanger 300 and a heater 400 connected in sequence, and the heater 400 is close to the booster pump 500; the circulating pump 200 is used to provide power for the circulation of the heat exchange medium, the heater 400 is used to heat the heat exchange medium, and the heat exchanger 300 is used to be connected with the external liquid supply device 600. Specifically, the heat exchanger 300 has a first heat exchange side and a second heat exchange side, the liquid outlet end of the first heat exchange side is in communication with the liquid inlet end of the heater 400, the liquid outlet end of the heater 400 is in communication with each liquid inlet pipe 107, wherein the booster pump 500 is connected to and in communication with the pipeline between the heater 400 and the hydraulic heat exchange plate 103. Each liquid outlet pipe 108 is in communication with the liquid inlet end of the circulating pump 200 respectively, and the liquid outlet end of the circulating pump 200 is in communication with the liquid inlet end of the first heat exchange side, so as to form a heat exchange medium circulation loop, which is a high-pressure circulation loop, and the pressure thereof is about 2-100 MPa. The liquid inlet end and the liquid outlet end of the second heat exchange side are in communication with the external liquid supply device 600, i.e., the liquid supply device for providing refrigerant or coolant at the vehicle end, so as to form a low-pressure circulation loop, and the pressure thereof is about 2 MPa or less. It should be noted that, in order to meet the pressure control of the heat exchange medium circulation loop, the pressure adjustment range of the booster pump 500 should at least meet 0-100 MPa.

[0109] It should be noted that, as shown in FIGS. 19-20, the pressure adjustment system and the thermal management system can also be separately arranged by those skilled in the art, in which case the hydraulic heat exchange plate 103 only plays a role in adjusting the restraining force. Specifically, a plurality of hydraulic heat exchange plates 103 can be connected in series, only one liquid inlet pipe 107 is provided, the liquid inlet pipe 107 is in communication with the booster pump 500, and the pressure of the heat exchange medium can be adjusted by adjusting the operating parameters of the booster pump 500, so that the hydraulic heat exchange plate 103 can adaptively expand and deform, and the restraining force applied to the battery cell 102 can be continuously and stably maintained within a suitable range. At the same time, the thermal management system can adopt a traditional heat exchange scheme, i.e., a heat exchanger 300 (i.e., a cooler or a heater) is arranged in the battery pack, the heat exchanger 300 is connected to the battery module as a whole through a heat-conducting adhesive, and the heat exchanger 300 is in communication with the liquid supply device for providing refrigerant or coolant at the vehicle end, so as to achieve cooling or heating of the battery. Compared with the above arrangement, the pressure adjustment and thermal management system of the embodiment of the application can simultaneously realize pressure adjustment (i.e., restraining force adjustment) and temperature adjustment of the battery cell 102, thereby reducing the number of parts and being conducive to reducing the cost of the vehicle.

[0110] In some optional embodiments of the present application, the pressure regulation and thermal management system further comprises a controller, a temperature sensor and a pressure sensor; the temperature sensor and the pressure sensor are arranged on the pipeline and are in communication connection with the controller respectively, the temperature sensor is configured to obtain temperature information of the heat exchange medium, and the pressure sensor is configured to obtain pressure information of the heat exchange medium; the controller is configured to control the heat exchange device to adjust the temperature of the heat exchange medium based on the temperature information and to control the booster pump 500 to adjust the pressure of the heat exchange medium based on the pressure information. In this way, by arranging the temperature sensor and the pressure sensor, the temperature and the pressure of the heat exchange medium in the heat exchange medium circulation loop can be monitored in real time. By arranging the controller, the controller can control the heat exchange device and the booster pump 500 to adjust the temperature and the pressure of the heat exchange medium based on the obtained temperature information and pressure information, which is conducive to improving the heat exchange efficiency and the constraint reliability of the solid-state battery module 100. In addition, in order to improve the detection accuracy, the temperature sensor and the pressure sensor are usually arranged in the pipeline between the booster pump 500 and the hydraulic heat exchange plate 103.

[0111] In actual application, after the pressure regulation and thermal management system is assembled and the heat exchange medium is filled into the heat exchange medium circulation loop, the pressure of the booster pump 500 is increased to a preset value, under the action of a huge pressure, the hydraulic heat exchange plate 103 is deformed and extruded in the first direction X to press the battery cell 102, at the same time, the constraint frame 104 constrains the edges of the battery cell 102, and the shell 101 assists in constraining all the battery cells 102, so that the initial constraint of the solid-state battery module 100 is completed. In the charging and discharging process, affected by the expansion and contraction of the battery cell 102, the temperature and the deformation of other components, when the constraint force acting on the battery cell 102 changes, the pressure sensor can detect the change of the pressure information, and the controller can control the booster pump 500 to adjust the pressure of the heat exchange medium based on the pressure information, so that the constraint force acting on the battery cell 102 is continuously and stably maintained in a suitable range.

[0112] The present application also provides a vehicle comprising the pressure regulation and thermal management system and a plurality of battery cells 102 according to any one of the above embodiments. The battery cells 102 can be solid-state battery cells or battery cells with electrolyte, which are not limited herein.

[0113] It should be noted that the structure of the pressure regulation and thermal management system in the present application is the same as that of the pressure regulation and thermal management system in any one of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0114] The present application also provides a power consumption device comprising the battery module according to the above embodiments.

[0115] It should be noted that the structure of the battery module in the embodiments of the present application is the same as that of the battery module in the above-described embodiments, and the beneficial effects are similar, which will not be described herein.

[0116] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0117] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pressure regulation and thermal management system, characterized in that, The pressure regulating and thermal management system comprises: a shell (101) and a plurality of hydraulic heat exchange plates (103); the shell (101) has a mounting cavity (1013), the hydraulic heat exchange plates (103) are arranged in the mounting cavity (1013) and separate the mounting cavity (1013) into a receiving space for receiving a battery cell (102); wherein the hydraulic heat exchange plates (103) are adapted to exchange heat with the battery cell (102) and are adapted to be controlled to deform to adjust the constraint force applied by the hydraulic heat exchange plates (103) to the battery cell (102).

2. The pressure regulation and thermal management system of claim 1, wherein, The hydraulic heat exchange plate (103) is provided with a containing cavity (1031) containing a heat exchange medium; The pressure regulating and thermal management system further comprises a booster pump (500) in communication with the containing cavity (1031), and the booster pump (500) is used to adjust the pressure of the heat exchange medium in the containing cavity (1031) to cause the hydraulic heat exchange plate (103) to deform.

3. The pressure regulation and thermal management system of claim 2, wherein, The battery cell (102) comprises a first side wall (1021) perpendicular to a first direction, and the first side wall (1021) is the largest wall of the battery cell (102) in area; The first side wall (1021) is in abutment with the hydraulic heat exchange plate (103), and the normal projection of the containing cavity (1031) covers the normal projection of the first side wall (1021) in a plane perpendicular to the first direction along the first direction.

4. The pressure regulation and thermal management system of claim 3, wherein, The hydraulic heat exchange plate (103) extends along a second direction perpendicular to the first direction, and the hydraulic heat exchange plate (103) further comprises an inlet (1032) and an outlet (1033), and the inlet (1032) is used to communicate with the booster pump (500); The inlet (1032) and the outlet (1033) are arranged at both ends of the hydraulic heat exchange plate (103) along the second direction and are in communication with the containing cavity (1031), the inlet (1032) is used for the heat exchange medium to flow into the containing cavity (1031), and the outlet (1033) is used for the heat exchange medium to flow out of the containing cavity (1031).

5. The pressure regulation and thermal management system of claim 4, wherein, The pressure regulating and thermal management system further comprises an inlet pipe (107) and an outlet pipe (108) for communicating with a heat exchange device to realize circulation of the heat exchange medium; The inlets (1032) of the plurality of hydraulic heat exchange plates (103) are in communication with the inlet pipe (107), and the outlets (1033) of the plurality of hydraulic heat exchange plates (103) are in communication with the outlet pipe (108).

6. The pressure regulation and thermal management system of claim 4, wherein, The pressure regulating and thermal management system further comprises an inlet pipe (107), an outlet pipe (108), and an adapter pipe (109). The liquid inlet pipe (107) and the liquid outlet pipe (108) are respectively communicated with the liquid inlet (1032) of one of the two outermost hydraulic heat exchange plates (103) and the liquid outlet (1033) of the other one of the two outermost hydraulic heat exchange plates (103), and the adapter pipe (109) is respectively communicated with the liquid inlet (1032) of one of the two adjacent hydraulic heat exchange plates (103) and the liquid outlet (1033) of the other one of the two adjacent hydraulic heat exchange plates (103).

7. The pressure regulating and thermal management system of any one of claims 1-6, wherein, The hydraulic heat exchange plate (103) is a stainless steel hydraulic heat exchange plate (103).

8. The pressure regulating and thermal management system of any one of claims 1-7, wherein, The pressure regulation and thermal management system further comprises a constraint frame (104). The constraint frame (104) is arranged between the battery cell (102) and the shell (101) and abuts at least part of the battery cell (102) and the shell (101) to constrain the battery cell (102).

9. The pressure regulating and thermal management system of any of claims 1-8, wherein, The shell (101) comprises two first side plates (1011) and two second side plates (1012). The two first side plates (1011) are oppositely arranged along a first direction, and the two second side plates (1012) are arranged between the two first side plates (1011) to form the mounting cavity (1013) together with the first side plates (1011). The first side plate (1011) and the second side plate (1012) have a connection portion which is in a round corner transition shape.

10. The pressure regulation and thermal management system of claim 9, wherein, The pressure regulation and thermal management system further comprises two end plates (105). The two end plates (105) are arranged in the mounting cavity (1013) along the first direction and abut one of the first side plates (1011). The end plate (105) has an edge portion (1051) close to the connection portion, and the edge portion (1051) is in a round corner transition shape.

11. The pressure regulation and thermal management system of claim 10, wherein, The pressure regulation and thermal management system further comprises a partition plate (106). The partition plate (106) is arranged on a side of the end plate (105) away from the first side plate (1011), and the partition plate (106) is used for heat insulation.

12. The pressure regulating and thermal management system of any one of claims 1-11, wherein, The pressure regulation and thermal management system further comprises a heat exchange device and a booster pump (500). The heat exchange device, the booster pump (500) and the hydraulic heat exchange plate (103) are connected by pipelines to form a heat exchange medium circulation loop, the heat exchange device is used for adjusting the temperature of the heat exchange medium in the hydraulic heat exchange plate (103), and the booster pump (500) is used for adjusting the pressure of the heat exchange medium in the hydraulic heat exchange plate (103).

13. The pressure regulation and thermal management system of claim 12, wherein, The pressure regulation and thermal management system further comprises a controller, a temperature sensor and a pressure sensor. The temperature sensor and the pressure sensor are arranged on the pipeline and are in communication connection with the controller, the temperature sensor is used for acquiring temperature information of the heat exchange medium, and the pressure sensor is used for acquiring pressure information of the heat exchange medium. The controller controls the heat exchange device to adjust the temperature of the heat exchange medium based on the temperature information and controls the booster pump (500) to adjust the pressure of the heat exchange medium based on the pressure information.

14. The pressure regulation and thermal management system of claim 12, wherein, The heat exchange device comprises a circulating pump (200), a heat exchanger (300) and a heater (400) connected in sequence, and the heater (400) is close to the booster pump (500). The circulating pump (200) is used for providing power for circulation of the heat exchange medium, the heater (400) is used for heating the heat exchange medium, and the heat exchanger (300) is used for being connected with an external liquid supply device (600).

15. A battery module (100), characterized in that Comprise: The pressure regulation and thermal management system and the plurality of battery cells (102) of any one of claims 1-14.

16. An electrical device, characterized by The power utilization device comprises the battery module (100) of claim 15. The power utilization device comprises the battery module (100) of claim 15.

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