Battery system, battery module and vehicle

Abstract

The present application belongs to the technical field of batteries. Disclosed are a battery system, a battery module (10) and a vehicle. The battery system comprises: a battery module (10), which comprises at least two hydraulic heat exchange components (11) and a battery cell (12), wherein the at least two hydraulic heat exchange components (11) are arranged at intervals, the battery cell (12) is arranged between two adjacent hydraulic heat exchange components (11), the hydraulic heat exchange components (11) are used for carrying a heat exchange medium, and the carrying capacity and / or temperature of the heat exchange medium is adjustable; and a control assembly, which is connected to the hydraulic heat exchange components (11) and is used for controlling the carrying capacity and / or temperature of the heat exchange medium in the hydraulic heat exchange components (11), so as to adjust a pressure value exerted by the hydraulic heat exchange components (11) on the adjacent battery cell (12) and / or adjust the heat transferred by the hydraulic heat exchange components (11) to the adjacent battery cell (12).

Description

Battery system, battery module and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202411091382.3, filed on August 08, 2024, and entitled "Battery system, battery module and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery, in particular to a battery system, a battery module and a vehicle. BACKGROUND

[0003] The current new energy vehicle industry is in a rapid growth period. As one of the core technologies of new energy vehicles, power batteries directly determine the performance of new energy vehicles. Solid-state batteries, as a kind of power battery, have the advantages of high constraint and suitable working temperature.

[0004] The existing solid-state battery includes a plurality of battery modules arranged in sequence and a constraint ring hoop sleeved outside the plurality of battery modules, and the constraint ring hoop provides a constraint force for the plurality of battery modules.

[0005] However, with the use of solid-state batteries, the size of the battery module will change, and the constraint force required by the battery module will also change. The above constraint method will result in insufficient constraint force of the battery module. SUMMARY

[0006] The present application discloses a battery system, a battery module and a vehicle to solve or at least partially solve the problem of insufficient constraint force of the battery module with the use of solid-state batteries in the prior art.

[0007] To solve the above technical problems, the present application is implemented as follows:

[0008] In a first aspect, the present application discloses a battery system, which includes a battery module, the battery module includes at least two hydraulic heat exchange elements and a battery cell, the at least two hydraulic heat exchange elements are arranged at intervals, the battery cell is arranged between two adjacent hydraulic heat exchange elements, the hydraulic heat exchange element is used to carry a heat exchange medium, and the carrying capacity of the heat exchange medium and / or the temperature of the heat exchange medium is adjustable; a control assembly connected to the hydraulic heat exchange element, the control assembly is used to control the carrying capacity of the heat exchange medium in the hydraulic heat exchange element and / or the temperature of the heat exchange medium, so as to adjust the pressure value of the adjacent battery cell applied by the hydraulic heat exchange element and / or adjust the heat transferred to the adjacent battery cell by the hydraulic heat exchange element.

[0009] Optionally, the battery system further comprises: a pressure component connected between the hydraulic heat exchanger and the control component, the pressure component being configured to obtain a pressure value of the hydraulic heat exchanger applied to the adjacent battery cell and adjust a carrying capacity of the heat exchange medium in the hydraulic heat exchanger to adjust the pressure value; and a heat exchange component connected between the hydraulic heat exchanger and the control component, the heat exchange component being configured to obtain a temperature value of the heat exchange medium in the hydraulic heat exchanger and adjust the temperature of the heat exchange medium to adjust the heat transferred by the hydraulic heat exchanger to the adjacent battery cell; the control component being configured to obtain the pressure value and the temperature value and control the pressure component to adjust the pressure value and / or control the heat exchange component to adjust the temperature value.

[0010] Optionally, the hydraulic heat exchanger comprises a first metal plate and a second metal plate, wherein a peripheral side of the first metal plate is connected to a peripheral side of the second metal plate, and the first metal plate and the second metal plate enclose a containing cavity configured to carry the heat exchange medium, and the carrying capacity of the heat exchange medium in the containing cavity and / or the temperature of the heat exchange medium is adjustable.

[0011] Optionally, the heat exchange component comprises a heat exchanger, wherein the containing cavity has a first end and a second end arranged oppositely, one end of the heat exchanger is connected to the first end, and the other end of the heat exchanger is connected to the second end.

[0012] Optionally, the heat exchange component further comprises a circulating pump, a heater and a temperature sensor, wherein the circulating pump, the heater and the temperature sensor are connected in sequence between the heat exchanger and the hydraulic heat exchanger.

[0013] Optionally, the pressure component comprises a pressure pump and a pressure sensor, wherein the pressure pump and the pressure sensor are connected in sequence between the heat exchanger and the hydraulic heat exchanger.

[0014] Optionally, the battery system further comprises a first manifold and a second manifold, wherein the hydraulic heat exchanger has a containing cavity with a first end and a second end arranged oppositely, the first end has a first opening, and the second end has a second opening; the first manifold has at least two first branch openings and a first converging opening, each first branch opening is connected to the first opening of one of the hydraulic heat exchangers, and the first converging opening is connected to one end of the heat exchange component; the second manifold has at least two second branch openings and a second converging opening, each second branch opening is connected to the second opening of one of the hydraulic heat exchangers, and the second converging opening is connected to the other end of the heat exchange component.

[0015] Optionally, the battery system comprises an adapter pipe, wherein the hydraulic heat exchanger has a containing cavity, the containing cavity has oppositely arranged first and second ends, the first end has a first opening, and the second end has a second opening; in the two adjacent hydraulic heat exchangers, one end of the adapter pipe is connected to the first opening of one of the hydraulic heat exchangers, and the other end is connected to the first opening of the other hydraulic heat exchanger, or one end of the adapter pipe is connected to the second opening of one of the hydraulic heat exchangers, and the other end is connected to the second opening of the other hydraulic heat exchanger; the hydraulic heat exchanger closest to the outside is connected to the heat exchange assembly in the direction in which the at least two hydraulic heat exchangers are arranged at intervals.

[0016] In a second aspect, the application discloses a battery module, which comprises the battery system of the first aspect.

[0017] Optionally, the battery module further comprises a shell, the shell has a ring structure, the shell is sleeved on the outside of the at least two hydraulic heat exchangers, and the end of the hydraulic heat exchanger is exposed to the shell in the second direction; wherein the at least two hydraulic heat exchangers are arranged at intervals in the first direction, and the second direction intersects the first direction.

[0018] Optionally, the battery module further comprises a shell, the shell has a ring structure, the shell is sleeved on the outside of the at least two hydraulic heat exchangers, and the end of the hydraulic heat exchanger is exposed to the shell in the second direction; wherein the at least two hydraulic heat exchangers are arranged at intervals in the first direction, and the second direction intersects the first direction.

[0019] Optionally, the battery module further comprises an end plate, wherein the end plate is arranged between the shell and the hydraulic heat exchanger closest to the shell in the first direction, and the structure of the part of the end plate abutting the shell is adapted to the corresponding part of the shell; wherein the first direction is the direction in which the at least two hydraulic heat exchangers are arranged at intervals.

[0020] Optionally, the end plate has a plurality of hollow parts, and the plurality of hollow parts extend in the second direction; wherein the second direction intersects the first direction.

[0021] Optionally, the battery module further comprises a partition plate, and the partition plate is arranged between the end plate and the adjacent hydraulic heat exchanger in the first direction.

[0022] Optionally, the battery module further comprises a first constraint frame and a second constraint frame, the first constraint frame is sleeved on one side of the battery cell in the first direction, the second constraint frame is sleeved on the other side of the battery cell, and the first constraint frame and the second constraint frame are buckled; wherein the first direction is the direction in which the at least two hydraulic heat exchangers are arranged at intervals.

[0023] Optionally, the end of the battery cell has a pole core in the second direction intersecting the first direction, and the end of the first constraint frame and / or the second constraint frame is provided with a support portion, and the pole core abuts against the support portion.

[0024] In a third aspect, the application also discloses a vehicle, which comprises a vehicle body and the battery system of the first aspect, and the battery system is connected to the vehicle body.

[0025] The battery system and the vehicle disclosed by the embodiments of the application. The battery system comprises a battery module, the battery module comprises at least two hydraulic heat exchange elements and a battery cell, the at least two hydraulic heat exchange elements are arranged at intervals, the battery cell is arranged between two adjacent hydraulic heat exchange elements, the hydraulic heat exchange element is used for carrying a heat exchange medium, and the carrying capacity of the heat exchange medium and / or the temperature of the heat exchange medium can be adjusted; and a control assembly, the control assembly is connected to the hydraulic heat exchange element, and the control assembly is used for controlling the carrying capacity of the heat exchange medium in the hydraulic heat exchange element and / or the temperature of the heat exchange medium, so as to adjust the pressure value of the hydraulic heat exchange element applied to the battery cell and / or adjust the heat transferred by the hydraulic heat exchange element to the adjacent battery cell.

[0026] The battery system disclosed by the embodiments of the application is arranged between two adjacent hydraulic heat exchange elements, the hydraulic heat exchange element can carry a heat exchange medium, the carrying capacity of the heat exchange medium and / or the temperature of the heat exchange medium can be adjusted. The control assembly is connected to the hydraulic heat exchange element, the carrying capacity of the heat exchange medium in the hydraulic heat exchange element and / or the temperature of the heat exchange medium is controlled through the control assembly, so as to adjust the pressure value of the hydraulic heat exchange element applied to the adjacent battery cell and / or adjust the heat transferred by the hydraulic heat exchange element to the adjacent battery cell, so that the constraint force of the battery module can be adjusted at any time, so as to ensure that the battery module has good constraint force in the process of use. And, the temperature of the battery module can be adjusted at any time, so as to ensure that the battery module is in a more optimal temperature range in the process of use. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 shows a structural schematic diagram of the battery system in the embodiments of the application;

[0028] Fig. 2 shows a working principle diagram one of the battery system in the embodiments of the application;

[0029] Fig. 3 shows a working principle diagram two of the battery system in the embodiments of the application;

[0030] Fig. 4 shows a working principle diagram of the pressure assembly in the embodiments of the application;

[0031] Fig. 5 shows a working principle diagram of the heat exchange assembly in the embodiments of the application;

[0032] Figure 6 shows a connection mode of the hydraulic heat exchanger in the battery module according to an embodiment of the present application;

[0033] Figure 7 shows a connection mode of the hydraulic heat exchanger in the battery module according to an embodiment of the present application;

[0034] Figure 8 shows a connection mode of the hydraulic heat exchanger in the battery module according to an embodiment of the present application;

[0035] Figure 9 shows a structural schematic diagram of the battery module according to an embodiment of the present application;

[0036] Figure 10 shows an exploded view of the battery module according to an embodiment of the present application;

[0037] Figure 11 shows a sectional view of the battery module along the direction A-A in Figure 9;

[0038] Figure 12 shows an enlarged view of a part of Figure 11;

[0039] Figure 13 shows a structural schematic diagram of the housing in the battery module according to an embodiment of the present application;

[0040] Figure 14 shows a structural schematic diagram of the hydraulic heat exchanger according to an embodiment of the present application;

[0041] Figure 15 shows a structural schematic diagram of the first constraint frame or the second constraint frame according to an embodiment of the present application;

[0042] Figure 16 shows a structural schematic diagram of the first manifold or the second manifold according to an embodiment of the present application;

[0043] Figure 17 shows a structural schematic diagram of the end plate according to an embodiment of the present application;

[0044] Figure 18 shows a sectional view of the end plate according to an embodiment of the present application.

[0045] Reference signs: 100: battery system; 10: battery module; 11: hydraulic heat exchanger; 111: first opening; 112: second opening; 12: battery cell; 13: housing; 14: end plate; 141: hollow part; 15: partition plate; 16: first constraint frame; 161: support part; 17: second constraint frame; 20: pressure assembly; 21: booster pump; 22: pressure sensor; 30: heat exchange assembly; 31: heat exchanger; 32: circulating pump; 33: heater; 34: temperature sensor; 40: first manifold; 401: first branch opening; 402: first collection opening; 41: second manifold; 50: adapter pipe; 60: control assembly; 70: box; 701: mounting space; X: first direction; Y: second direction. DETAILED DESCRIPTION

[0046] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0047] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0048] Referring to FIG. 1, a structural schematic diagram of the battery system in the embodiment of the present application is shown; referring to FIG. 2, a working principle diagram one of the battery system in the embodiment of the present application is shown; referring to FIG. 3, a working principle diagram two of the battery system in the embodiment of the present application is shown; referring to FIG. 4, a working principle diagram of the pressure assembly in the embodiment of the present application is shown; referring to FIG. 5, a working principle diagram of the heat exchange assembly in the embodiment of the present application is shown; referring to FIG. 6, a connection mode one of the hydraulic heat exchange element in the battery module in the embodiment of the present application is shown; referring to FIG. 7, a connection mode two of the hydraulic heat exchange element in the battery module in the embodiment of the present application is shown; referring to FIG. 8, a connection mode three of the hydraulic heat exchange element in the battery module in the embodiment of the present application is shown.

[0049] As shown in FIGS. 1 to 8, the embodiment of the present application discloses a battery system 100, which comprises a battery module 10, the battery module 10 comprises at least two hydraulic heat exchange elements 11 and battery cells 12, the at least two hydraulic heat exchange elements 11 are arranged at intervals, the battery cells 12 are arranged between the adjacent two hydraulic heat exchange elements 11, the hydraulic heat exchange element 11 is used for carrying a heat exchange medium, the carrying capacity of the heat exchange medium and / or the temperature of the heat exchange medium is adjustable; a control assembly 60 is connected to the hydraulic heat exchange element 11, the control assembly 60 is used for controlling the carrying capacity of the heat exchange medium and / or the temperature of the heat exchange medium in the hydraulic heat exchange element 11, so as to adjust the pressure value applied by the hydraulic heat exchange element 11 to the adjacent battery cell 12 and / or adjust the heat transferred by the hydraulic heat exchange element 11 to the adjacent battery cell 12.

[0050] The embodiment of the present application discloses a battery system 100, which can be used in a new energy vehicle. The new energy vehicle can be a pure electric vehicle, or a hybrid vehicle. In this regard, the present application does not make specific limitations, and any new energy vehicle is applicable.

[0051] As shown in FIGS. 1-8, the battery system 100 disclosed in the embodiments of the present application comprises a battery module 10 and a control assembly 60. The battery module 10 comprises at least two hydraulic heat exchange members 11 and battery cells 12. The at least two hydraulic heat exchange members 11 are arranged at intervals, and the battery cells 12 are arranged between the adjacent two hydraulic heat exchange members 11.

[0052] As shown in FIG. 14, the hydraulic heat exchange member 11 in the embodiments of the present application can be stamped and welded from two metal sheets to form a containing cavity in the hydraulic heat exchange member 11 for carrying the heat exchange medium. The hydraulic heat exchange member 11 is flat, and the side surface shape is rectangular or similar to rectangular. The hydraulic heat exchange member 11 can withstand a pressure of 100 MPa or less.

[0053] Of course, the above is only an individual example of the specific structure of the hydraulic heat exchange member 11, and is not a limitation on the specific structure of the hydraulic heat exchange member 11. In actual applications, the specific structure of the hydraulic heat exchange member 11 can also be set as needed by the technician.

[0054] In the embodiments of the present application, the carrying capacity of the heat exchange medium in the hydraulic heat exchange member 11 can be adjusted. For example, the hydraulic heat exchange member 11 has a containing cavity with two openings, and the heat exchange medium can flow into the containing cavity from one opening and flow out of the containing cavity from the other opening. By adjusting the inflow and outflow of the heat exchange medium, the carrying capacity of the heat exchange medium in the hydraulic heat exchange member 11 can be adjusted.

[0055] In the embodiments of the present application, the temperature of the heat exchange medium in the hydraulic heat exchange member 11 can also be adjusted. For example, the hydraulic heat exchange member 11 has a containing cavity with two openings, and the heat exchange medium can flow into the containing cavity from one opening and flow out of the containing cavity from the other opening. By adjusting the temperature of the heat exchange medium flowing into the containing cavity, the temperature of the heat exchange medium in the hydraulic heat exchange member 11 can be adjusted.

[0056] As shown in FIGS. 6-8, in the battery module 10, the battery cells 12 are arranged between the adjacent two hydraulic heat exchange members 11, and the adjacent two hydraulic heat exchange members 11 are tightly attached to the battery cells 12 in the middle, and the battery cells 12 are clamped by the adjacent two hydraulic heat exchange members 11.

[0057] It should be noted that the battery cell 12 in the embodiments of the present application is a solid-state battery cell, and the solid-state battery is packaged by an aluminum-plastic film packaging process.

[0058] The battery system 100 disclosed in the embodiments of the present application further comprises a control assembly 60, which is connected to the hydraulic heat exchange member 11. The carrying capacity of the heat exchange medium in the hydraulic heat exchange member 11 and / or the temperature of the heat exchange medium is controlled by the control assembly 60, so as to adjust the pressure value applied by the hydraulic heat exchange member 11 to the adjacent battery cell 12 and / or adjust the heat transferred by the hydraulic heat exchange member 11 to the adjacent battery cell 12.

[0059] The battery system 100 disclosed by the embodiments of the present application sets the battery cell 12 between two adjacent hydraulic heat exchange members 11, the hydraulic heat exchange member 11 can carry the heat exchange medium, and the carrying amount of the heat exchange medium and / or the temperature of the heat exchange medium can be adjusted. The control assembly 60 is connected to the hydraulic heat exchange member 11, and the carrying amount of the heat exchange medium in the hydraulic heat exchange member 11 and / or the temperature of the heat exchange medium is controlled through the control assembly 60 to adjust the pressure value applied by the hydraulic heat exchange member 11 to the adjacent battery cell 12 and / or adjust the heat transferred by the hydraulic heat exchange member 11 to the adjacent battery cell 12, so that the restraining force of the battery module can be adjusted at any time to ensure that the battery module has good restraining force during use. And, the temperature of the battery module can also be adjusted at any time to ensure that the battery module is in a more optimal temperature range during use.

[0060] Optionally, as shown in FIG. 1 and FIG. 2, the battery system 100 disclosed by the embodiments of the present application further comprises: a pressure assembly 20 connected between the hydraulic heat exchange member 11 and the control assembly 60, the pressure assembly 20 is used to obtain the pressure value applied by the hydraulic heat exchange member 11 to the adjacent battery cell 12, and adjust the carrying amount of the heat exchange medium in the hydraulic heat exchange member 11 to adjust the pressure value; a heat exchange assembly 30 connected between the hydraulic heat exchange member 11 and the control assembly 60, the heat exchange assembly 30 is used to obtain the temperature value of the heat exchange medium in the hydraulic heat exchange member 11, and adjust the temperature of the heat exchange medium to adjust the heat transferred by the hydraulic heat exchange member 11 to the adjacent battery cell 12; the control assembly 60 is used to obtain the pressure value and the temperature value, and control the pressure assembly 20 to adjust the pressure value, and / or control the heat exchange assembly 30 to adjust the temperature value.

[0061] That is, after the pressure assembly 20 obtains the pressure value applied by the hydraulic heat exchange member 11 to the adjacent battery cell 12, the pressure assembly 20 can feed back the pressure value to the control assembly 60, and the control assembly 60 adjusts the carrying amount of the heat exchange medium in the hydraulic heat exchange member 11 by regulating the running state of the pressure assembly 20, and then adjusts the pressure value applied by the hydraulic heat exchange member 11 to the battery cell 12.

[0062] After the heat exchange assembly 30 obtains the temperature value of the heat exchange medium in the hydraulic heat exchange member 11, the heat exchange assembly 30 can feed back the temperature value to the control assembly 60, and the control assembly 60 adjusts the temperature value of the heat exchange medium in the hydraulic heat exchange member 11 by regulating the running state of the heat exchange assembly 30.

[0063] Optionally, the battery system 100 can be provided with a plurality of battery modules 10, the control assembly 60 can be arranged on one side of the plurality of battery modules 10 along the first direction or on one side of the plurality of battery modules 10 along the second direction, and the control assembly 60 and the inner wall of the box 70 of the battery system 100 define a mounting space 701, and the pressure assembly 20 and the heat exchange assembly 30 can be arranged in the mounting space 701.

[0064] Optionally, the control assembly 60 can include a distribution box and a control board, the distribution box can be connected with the battery module 10 to realize external current distribution, and the control board can be electrically connected with the pressure assembly 20 and the heat exchange assembly 30 to realize signal transmission between the control assembly 60 and the pressure assembly 20 and the heat exchange assembly 30.

[0065] As shown in FIGS. 1 and 2, the battery system 100 disclosed in the embodiments of the present application further includes a heat exchange assembly 30 connected between the hydraulic heat exchange member 11 and the control assembly 60, the heat exchange assembly 30 can monitor the temperature value of the heat exchange medium in the hydraulic heat exchange member 11 and adjust the temperature of the heat exchange medium to adjust the heat transferred by the hydraulic heat exchange member 11 to the adjacent battery cell 12. The control assembly 60 can obtain the temperature value of the heat exchange medium.

[0066] As shown in FIG. 5, if the temperature value is greater than or equal to the first preset temperature value tl and less than or equal to the second preset temperature value th, the control assembly 60 determines that it is not necessary to adjust the temperature of the heat exchange medium in the hydraulic heat exchange member 11.

[0067] If the temperature value is less than the first preset temperature value tl, the control assembly 60 determines that heating treatment is needed for the heat exchange medium in the hydraulic heat exchange member 11 to increase the temperature of the heat exchange medium in the hydraulic heat exchange member 11. At this time, the control assembly 60 controls the heat exchange assembly 30 to work to flow the heat exchange medium with a higher temperature from the first opening 111 of the hydraulic heat exchange member 11 into the hydraulic heat exchange member 11, and the excess heat exchange medium in the hydraulic heat exchange member 11 can flow out from the second opening 112. The heat exchange medium with a higher temperature can transfer heat to the battery cell 12 by heat transfer, thereby increasing the temperature of the battery cell 12.

[0068] If the temperature value is greater than the second preset temperature value th, the control assembly 60 determines that cooling treatment is needed for the hydraulic heat exchange member 11 to reduce the temperature of the hydraulic heat exchange member 11. At this time, the control assembly 60 controls the heat exchange assembly 30 to work to flow the heat exchange medium with a lower temperature from the first opening 111 of the hydraulic heat exchange member 11 into the hydraulic heat exchange member 11, and the excess heat exchange medium in the hydraulic heat exchange member 11 can flow out from the second opening 112. The heat exchange medium with a lower temperature can transfer heat to the battery cell 12 by heat transfer, thereby reducing the temperature of the battery cell 12.

[0069] It should be noted that during the heating treatment and the cooling treatment, the heat exchange assembly 30 can monitor the temperature value of the heat exchange medium in the hydraulic heat exchange member 11 at any time. If the temperature value is greater than or equal to the first preset temperature value tl and less than or equal to the second preset temperature value th, the heating treatment or the cooling treatment is stopped.

[0070] The first preset temperature value tl and the second preset temperature value th in the embodiment of the application are set by the technician according to the needs. The first preset temperature value tl is less than the second preset temperature value th. As shown in FIG. 5, the first preset temperature value tl in the embodiment of the application is also called a heating start temperature value, and the second preset temperature value th is also called a cooling start temperature value.

[0071] As shown in FIGS. 1 and 2, the battery system 100 disclosed in the embodiment of the application further includes a pressure assembly 20 connected between the hydraulic heat exchange member 11 and the control assembly 60. The pressure assembly 20 can monitor the pressure value of the hydraulic heat exchange member 11 applied to the adjacent battery cell 12 and adjust the carrying capacity of the heat exchange medium in the hydraulic heat exchange member 11 to adjust the pressure value of the hydraulic heat exchange member 11 applied to the adjacent battery cell 12. The control assembly 60 can obtain the pressure value of the hydraulic heat exchange member 11 applied to the adjacent battery cell 12.

[0072] As shown in FIG. 4, if the pressure value is greater than or equal to the first preset pressure value Pl and less than or equal to the second preset pressure value PH, the control assembly 60 determines that the pressure of the hydraulic heat exchange member 11 does not need to be adjusted, that is, the carrying capacity of the heat exchange medium in the hydraulic heat exchange member 11 does not need to be adjusted.

[0073] If the pressure value is less than the first preset pressure value Pl, the control assembly 60 determines that the hydraulic heat exchange member 11 needs to be pressurized to increase the pressure of the hydraulic heat exchange member 11 applied to the adjacent battery cell 12. At this time, the control assembly 60 controls the pressure assembly 20 to work to inject more heat exchange medium from the first opening 11 of the hydraulic heat exchange member 11 into the hydraulic heat exchange member 11 to increase the carrying capacity of the heat exchange medium in the hydraulic heat exchange member 11, thereby increasing the pressure of the hydraulic heat exchange member 11 applied to the adjacent battery cell 12.

[0074] If the pressure value is greater than the second preset pressure value PH, the control assembly 60 determines that the hydraulic heat exchange member 11 needs to be depressurized to reduce the pressure of the hydraulic heat exchange member 11 applied to the adjacent battery cell 12. At this time, the control assembly 60 controls the pressure assembly 20 to work to extract the heat exchange medium in the hydraulic heat exchange member 11 from the second opening 112 to reduce the carrying capacity of the heat exchange medium in the hydraulic heat exchange member 11, thereby reducing the pressure of the hydraulic heat exchange member 11 applied to the adjacent battery cell 12.

[0075] It should be noted that during the pressurization process or the pressure relief process, the pressure assembly 20 can monitor the pressure value applied by the hydraulic heat exchanger 11 to the adjacent battery cell 12 at any time. If the pressure value is greater than or equal to the first preset pressure value Pl and less than or equal to the second preset pressure value PH, the pressurization process or the pressure relief process is stopped.

[0076] The first preset pressure value Pl and the second preset pressure value PH in the embodiments of the present application are set by the technician according to the needs. The first preset pressure value Pl is less than the second preset pressure value PH. The first preset pressure value Pl is also called the lower limit of the pressure, and the second preset pressure value PH is also called the upper limit of the pressure.

[0077] The battery system 100 disclosed in the embodiments of the present application sets the battery cell 12 between the two adjacent hydraulic heat exchangers 11, connects the pressure assembly 20 to the hydraulic heat exchanger 11, monitors the pressure value applied by the hydraulic heat exchanger 11 to the adjacent battery cell 12 through the pressure assembly 20, and adjusts the carrying capacity of the heat exchange medium in the hydraulic heat exchanger 11 through the pressure assembly 20 to adjust the pressure value applied by the hydraulic heat exchanger 11 to the adjacent battery cell 12. Thus, the constraint force of the battery module can be adjusted at any time to ensure that the battery module has good constraint force during use.

[0078] Further, in the embodiments of the present application, the battery cell 12 is arranged between the two adjacent hydraulic heat exchangers 11, and the heat exchange assembly 30 is connected to the hydraulic heat exchanger 11 to monitor the temperature of the heat exchange medium in the hydraulic heat exchanger 11 through the heat exchange assembly 30, and adjust the temperature of the heat exchange medium through the heat exchange assembly 30 to adjust the heat transferred by the hydraulic heat exchanger 11 to the adjacent battery cell 12. Thus, the temperature of the battery module can be adjusted at any time to ensure that the battery module is within a more optimal temperature range during use.

[0079] Further, in the embodiments of the present application, the heat exchange assembly 30 and the pressure assembly 20 are integrated in the battery system 100. The highly integrated design can simplify the structure of the battery system 100, reduce the number of parts of the battery system 100, reduce the cost of the battery system 100, and improve the reliability of the battery system 100 while ensuring the performance of the battery system 100.

[0080] Optionally, as shown in FIG. 14, the hydraulic heat exchanger 11 in the embodiments of the present application includes a first metal plate and a second metal plate. The peripheral side of the first metal plate is connected to the peripheral side of the second metal plate, and the first metal plate and the second metal plate enclose a containing cavity for carrying the heat exchange medium. The carrying capacity of the heat exchange medium and / or the temperature of the heat exchange medium in the containing cavity can be adjusted.

[0081] As shown in FIG. 14, the hydraulic heat exchange component 11 in the embodiment of the present application includes a first metal plate and a second metal plate, and the peripheral side of the first metal plate is connected to the peripheral side of the second metal plate to form an accommodating cavity enclosed by the first metal plate and the second metal plate. The heat exchange medium is carried in the accommodating cavity, and the carrying capacity of the heat exchange medium in the accommodating cavity and the temperature of the heat exchange medium can be adjusted.

[0082] Exemplarily, the first metal plate and the second metal plate in the embodiment of the present application are two metal sheets, and the peripheral sides of the two metal sheets are stamped and welded together to form the hydraulic heat exchange component 11 having the accommodating cavity. It should be noted that the hydraulic heat exchange component 11 in the embodiment of the present application is flat, and the side shape is rectangular or similar to a rectangle, and the peripheral circle has a stepped welding edge. The hydraulic heat exchange component 11 can withstand a pressure of 100 MPa or less.

[0083] Optionally, as shown in FIGS. 1 to 8, the heat exchange assembly 30 in the embodiment of the present application includes a heat exchanger 31, wherein the accommodating cavity has oppositely arranged first and second ends, one end of the heat exchanger 31 is connected to the first end, and the other end of the heat exchanger 31 is connected to the second end.

[0084] It should be noted that the at least two hydraulic heat exchange components 11 in the embodiment of the present application are arranged at intervals along the first direction X, and the second direction Y intersects the first direction X. Hereinafter, the second direction Y perpendicular to the first direction X will be taken as an example for related description.

[0085] The hydraulic heat exchange component 11 has an accommodating cavity, and along the second direction Y, the accommodating cavity has oppositely arranged first and second ends, the first end is provided with a first opening 111, and the second end is provided with a second opening 112. The first opening 111 and the second opening 112 are respectively the inlet and the outlet of the heat exchange medium.

[0086] As shown in FIG. 2, the heat exchange assembly 30 in the embodiment of the present application includes a heat exchanger 31. The heat exchanger 31 has a liquid inlet and a liquid outlet, and the heat exchange medium can enter the heat exchanger 31 from the liquid inlet and flow out of the heat exchanger 31 from the liquid outlet. Among them, the flow of the heat exchange medium into the heat exchanger 31 and the flow of the heat exchange medium out of the heat exchanger 31 from the liquid outlet belong to low-pressure circulation. The pressure of the low-pressure circulation is less than 2 MPa.

[0087] In the embodiment of the present application, the hydraulic heat exchange component 11 has an accommodating cavity, and along the second direction Y, the accommodating cavity has oppositely arranged first and second ends, the first end has a first opening 111, and the second end has a second opening 112, one end of the heat exchanger 31 is connected to the first opening 111, and the other end is connected to the second opening 112. So that the heat exchange medium in the heat exchanger 31 can flow into the hydraulic heat exchange component 11 from the first opening 111, and flow through the hydraulic heat exchange component 11, and flow out of the second opening 112.

[0088] As shown in FIG. 2, the heat exchange medium in the heat exchanger 31 flows into the first opening 111, flows through the hydraulic heat exchange member 11, and flows out of the second opening 112, and then enters the heat exchanger 31 again. The process belongs to a high-pressure cycle. The pressure of the high-pressure cycle is greater than or equal to 2 MPa and less than or equal to 100 MPa.

[0089] The heat exchanger 31 in the embodiment of the present application connects the high-pressure cycle area and the low-pressure cycle area, so that the heat exchange medium in the high-pressure cycle area and the heat exchange medium in the low-pressure cycle area can exchange heat. Further, the heat exchanger 31 can also block the pressure to ensure the pressure in the battery module 10.

[0090] It should be noted that the heat exchange medium in the embodiment of the present application needs to have the characteristics of insulation, high boiling point, flame retardant, non-corrosive, stable, low viscosity, high specific heat, etc.

[0091] Optionally, as shown in FIG. 1 and FIG. 2, the heat exchange assembly 30 in the embodiment of the present application further comprises a circulating pump 32, a heater 33 and a temperature sensor 34, wherein the circulating pump 32, the heater 33 and the temperature sensor 34 are connected between the heat exchanger 31 and the hydraulic heat exchange member 11 in sequence.

[0092] As shown in FIG. 2, the heat exchange assembly 30 in the embodiment of the present application further comprises a circulating pump 32, which is connected between the heat exchanger 31 and the hydraulic heat exchange member 11 in sequence, so as to control the flow direction and speed of the heat exchange medium through the circulating pump 32. The circulating pump 32 can also provide power for the flow of the heat exchange medium in the pipeline, and pump the heat exchange medium into the hydraulic heat exchange member 11.

[0093] As shown in FIG. 2, the heat exchange assembly 30 in the embodiment of the present application further comprises a heater 33, which is connected between the heat exchanger 31 and the hydraulic heat exchange member 11, so as to heat the heat exchange medium through the heater 33. It should be noted that if the vehicle can provide sufficient heating capacity, the heater 33 can not be provided.

[0094] As shown in FIG. 2, the heat exchange assembly 30 in the embodiment of the present application further comprises a temperature sensor 34, which monitors the temperature of the heat exchange medium through the temperature sensor 34.

[0095] The battery system 100 disclosed in the present application integrates the pressure assembly 20 and the heat exchange assembly 30, and shares the pipeline. As shown in FIG. 2, the heat exchange medium, such as coolant or refrigerant, provided by the whole vehicle can enter the heat exchanger 31 through the water inlet of the heat exchanger 31, and exchange heat with the heat exchange medium in the high-pressure cycle in the heat exchanger 31. When the heating capacity provided by the whole vehicle is insufficient, the heater 33 in the battery system 100 can also heat the heat exchange medium.

[0096] As shown in FIG. 5, when the battery system 100 starts, the control component 60 first reads the temperature values of the temperature sampling points (NTC) in all the battery modules 10. When the temperature values of all the temperature sampling points are greater than or equal to the first preset temperature value tl and less than or equal to the second preset temperature value th, the control component 60 determines that the temperature values are in the normal range, and the heater 33, the circulating pump 32 and the vehicle-end heat pipe are not operated.

[0097] When the temperature of a temperature sampling point exceeds the second preset temperature value th, the control component 60 determines that the hydraulic heat exchange component 11 needs to be cooled, at this time, the control component 60 controls the circulating pump 32 to work, the vehicle-end cooling starts, and the heat exchange medium continuously flows into the heat exchanger 31 to cool the heat exchange medium in the high-pressure circulation. The cooled heat exchange medium enters the hydraulic heat exchange component 11 under the action of the circulating pump 32, and cools the battery cell 12 through heat transfer until the temperature value of the battery module 10 is reduced to greater than or equal to the first preset temperature value tl and less than or equal to the second preset temperature value th.

[0098] When the temperature of a temperature sampling point is lower than the first preset temperature value tl, the control component 60 determines that the hydraulic heat exchange component 11 needs to be heated, at this time, the control component 60 controls the circulating pump 32 and the heater 33 to work. The heater 33 can directly heat the heat exchange medium in the high-pressure circulation, which is efficient and rapid. In addition, the heating of the vehicle-end can also be started, and the high-temperature heat exchange medium in the low-pressure circulation continuously flows through the heat exchanger 31 to heat the heat exchange medium in the high-pressure circulation. The heated heat exchange medium enters the hydraulic heat exchange component 11 under the action of the circulating pump 32, and heats the battery cell 12 through heat transfer until the temperature value of the battery module 10 rises to greater than or equal to the first preset temperature value tl and less than or equal to the second preset temperature value th.

[0099] It should be noted that during the heating or cooling process, the control component 60 also reads the temperature of the heat exchange medium in the high-pressure circulation before it enters the battery module 10. When the temperature range exceeds the second preset temperature value th, the heating or cooling efficiency can be adjusted in time to avoid the temperature of the heat exchange medium being too high or too low.

[0100] Optionally, as shown in FIGS. 1 and 2, the pressure component 20 in the embodiment of the application includes a booster pump 21 and a pressure sensor 22, wherein the booster pump 21 and the pressure sensor 22 are connected between the heat exchanger 31 and the hydraulic heat exchange component 11 in sequence.

[0101] As shown in FIG. 1 and FIG. 2, the pressure assembly 20 in the embodiment of the present application comprises a booster pump 21 and a pressure sensor 22. The booster pump 21 and the pressure sensor 22 are connected in sequence between the heat exchanger 31 and the hydraulic heat exchange member 11. The pressure of the heat exchange medium is monitored by the pressure sensor 22, and the pressure of the heat exchange medium is accurately controlled by the booster pump 21, so that the pressure value of the heat exchange medium is adjusted in the range of 0 MPa to 100 MPa.

[0102] Optionally, as shown in FIG. 6, the battery system 100 in the embodiment of the present application further comprises a first manifold 40 and a second manifold 41, wherein the hydraulic heat exchange member 11 has a containing cavity, the containing cavity has a first end and a second end arranged oppositely, the first end has a first opening 111, and the second end has a second opening 112; the first manifold 40 has at least two first branch openings 401 and a first collecting opening 402, each first branch opening 401 is connected to the first opening 111 of one hydraulic heat exchange member 11, and the first collecting opening 402 is connected to one end of the heat exchange assembly 30; the second manifold 41 has at least two second branch openings and a second collecting opening, each second branch opening is connected to the second opening of one hydraulic heat exchange member 11, and the second collecting opening is connected to the other end of the heat exchange assembly 30.

[0103] As shown in FIG. 6, the battery system 100 disclosed in the embodiment of the present application further comprises a first manifold 40 and a second manifold 41. The first manifold 40 and the second manifold 41 are both pipelines welded by metal, which can withstand a pressure below 100 MPa.

[0104] As shown in FIG. 16, the first manifold 40 in the embodiment of the present application comprises a long straight pipeline, the long straight pipeline is provided with at least two first branch openings 401 and a first collecting opening 402, each first branch opening 401 is connected to the first opening 111 of one hydraulic heat exchange member 11, and the first collecting opening 402 is connected to one end of the heat exchange assembly 30. Through the above arrangement, the heat exchange medium in the heat exchange assembly 30 can flow into the first manifold 40 from the first collecting opening 402, and flow into the corresponding hydraulic heat exchange member 11 from each first branch opening 401 through the corresponding first opening 111.

[0105] As shown in FIG. 16, the second manifold 41 in the embodiment of the present application also comprises a long straight pipeline, the long straight pipeline is provided with at least two second branch openings and a second collecting opening, each second branch opening is connected to the second opening 112 of one hydraulic heat exchange member 11, and the second collecting opening is connected to the other end of the heat exchange assembly 30. Through the above arrangement, the heat exchange medium in each hydraulic heat exchange member 11 can flow out from the second opening 112, flow into the second manifold 41 through the corresponding second branch opening, and flow into the heat exchange assembly 30 from the second collecting opening.

[0106] It can be understood that, in the embodiment of the application, the plurality of hydraulic heat exchangers 11 are connected in parallel through the first manifold pipe 40 and the second manifold pipe 41, and the first manifold pipe 40 and the second manifold pipe 41 play the role of converging and distributing. This scheme has the advantages of low flow resistance, large flow, high heat exchange efficiency, good temperature uniformity of the battery cell 12, etc.

[0107] Optionally, as shown in FIGS. 7 and 8, the battery system 100 in the embodiment of the application comprises an adapter pipe 50, wherein the hydraulic heat exchanger 11 has a containing cavity therein, the containing cavity has oppositely arranged first and second ends, the first end has a first opening 111, and the second end has a second opening 112; in the two adjacent hydraulic heat exchangers 11, one end of the adapter pipe 50 is connected to the first opening 111 of one hydraulic heat exchanger 11, and the other end of the adapter pipe 50 is connected to the first opening 111 of the other hydraulic heat exchanger 11, or one end of the adapter pipe 50 is connected to the second opening 112 of one hydraulic heat exchanger 11, and the other end of the adapter pipe 50 is connected to the second opening 112 of the other hydraulic heat exchanger 11; in the direction of the interval arrangement of the at least two hydraulic heat exchangers 11, the hydraulic heat exchanger 11 closest to the outer side is connected to the heat exchange assembly 30.

[0108] As shown in FIGS. 7 and 8, the battery system 100 disclosed in the embodiment of the application further comprises an adapter pipe 50, and the adapter pipe 50 is a pipe welded by metal and can withstand a pressure of 100 MPa or less.

[0109] As shown in FIGS. 7 and 8, in the two adjacent hydraulic heat exchangers 11, one end of the adapter pipe 50 is connected to the first opening 111 of one hydraulic heat exchanger 11, and the other end of the adapter pipe 50 is connected to the first opening 111 of the other hydraulic heat exchanger 11, or one end of the adapter pipe 50 is connected to the second opening 112 of one hydraulic heat exchanger 11, and the other end of the adapter pipe 50 is connected to the second opening 112 of the other hydraulic heat exchanger 11. The two adjacent hydraulic heat exchangers 11 are connected in series through the adapter pipe 50, so that the heat exchange medium can flow between the adjacent hydraulic heat exchangers 11.

[0110] It should be noted that the hydraulic heat exchanger 11 in the embodiment of the application can only pressurize the battery cell 12 to improve the restraint force of the battery module 10, or can only adjust the temperature of the battery cell 12. Of course, the battery cell 12 can be pressurized and the temperature of the battery cell 12 can be adjusted at the same time.

[0111] As shown in FIG. 8, when only the battery cell 12 needs to be pressurized, in the direction of the interval arrangement of the at least two hydraulic heat exchangers 11, only the hydraulic heat exchanger 11 closest to the outer side can be connected to the heat exchange assembly 30, so that the heat exchange medium can flow from the heat exchange assembly 30 into the hydraulic heat exchanger 11 closest to the outer side, and flow through the plurality of hydraulic heat exchangers 11 to pressurize the battery cell 12 between the adjacent hydraulic heat exchangers 11.

[0112] As shown in FIG. 7, when both the pressure boosting of the battery cell 12 and the temperature adjustment of the battery cell 12 are needed, the two hydraulic heat exchangers 11 closest to the outer side can be connected to the heat exchange assembly 30 in the direction in which the hydraulic heat exchangers 11 are arranged at intervals, so that the heat exchange medium can flow into one of the two hydraulic heat exchangers 11 closest to the outer side from one end of the heat exchange assembly 30, flow through the plurality of hydraulic heat exchangers 11, and flow out of the other of the two hydraulic heat exchangers 11 closest to the outer side, thereby boosting the pressure of the battery cell 12 between the two adjacent hydraulic heat exchangers 11 and adjusting the temperature of the battery cell 12 between the two adjacent hydraulic heat exchangers 11 by heat transfer.

[0113] In the embodiment, the hydraulic heat exchangers 11 are connected together through the adapter pipe 50, and the flow path of the heat exchange medium in the battery module 10 is S-shaped. In this scheme, the adapter pipe 50 is easy to manufacture, the stacking progress of the battery module 10 is less demanding, and the assembly of the battery module 10 is good.

[0114] Referring to FIG. 9, a structural schematic diagram of the battery module in the embodiment is shown; referring to FIG. 10, an exploded view of the battery module in the embodiment is shown; referring to FIG. 11, a sectional view of the battery module in the embodiment is shown; referring to FIG. 12, a partial enlarged view of FIG. 11 is shown; referring to FIG. 13, a structural schematic diagram of the housing in the battery module in the embodiment is shown; referring to FIG. 14, a structural schematic diagram of the hydraulic heat exchanger in the embodiment is shown; referring to FIG. 15, a structural schematic diagram of the first constraint frame or the second constraint frame in the embodiment is shown; referring to FIG. 16, a structural schematic diagram of the first header pipe or the second header pipe in the embodiment is shown; referring to FIG. 17, a structural schematic diagram of the end plate in the embodiment is shown; and referring to FIG. 18, a sectional view of the end plate in the embodiment is shown.

[0115] As shown in FIGS. 9 to 18, the embodiment discloses a battery module, which includes the battery module 10 in the above-mentioned embodiments.

[0116] As shown in FIGS. 9 to 18, the embodiment discloses a battery module 10, which is used in the battery system 100 in the above-mentioned embodiments, and can ensure that the battery module 10 has good constraint force during use. Further, the battery module 10 can also be ensured to be in a more optimal temperature range during use.

[0117] Optionally, as shown in FIGS. 9-13, the battery module 10 in the embodiment of the present application further comprises a shell 13, the shell 13 has a ring structure, the shell 13 is sleeved outside the at least two hydraulic heat exchange pieces 11, and the end portions of the hydraulic heat exchange pieces 11 are exposed outside the shell 13 along the second direction Y; wherein the at least two hydraulic heat exchange pieces 11 are arranged at intervals along the first direction X, and the second direction Y intersects the first direction X.

[0118] In the embodiment of the present application, the direction in which the at least two hydraulic heat exchange pieces 11 are arranged at intervals is set as the first direction X, and the second direction Y intersects the first direction X. In the following, the second direction Y is taken as an example of being perpendicular to the first direction X, and relevant descriptions are made.

[0119] As shown in FIGS. 9-13, the battery module 10 in the embodiment of the present application further comprises a shell 13, the shell 13 has a ring structure, the shell 13 has a through hole, the through hole penetrates the shell 13 along the second direction Y to form the ring structure of the shell 13. The shell 13 is sleeved outside the at least two hydraulic heat exchange pieces 11 to fix the at least two hydraulic heat exchange pieces 11 and the battery cells 12 by the shell 13, so as to provide a constraint force for the at least two hydraulic heat exchange pieces 11 and the battery cells 12.

[0120] As shown in FIGS. 9-13, along the second direction Y, the end portions of the hydraulic heat exchange pieces 11 and the battery cells 12 are exposed outside the shell 13. It can be understood that, along the second direction Y, the end portions of the hydraulic heat exchange pieces 11 and the battery cells 12 are not covered by the shell 13.

[0121] The battery module 10 disclosed in the embodiment of the present application further comprises a protective cover connected to the end portions of the hydraulic heat exchange pieces 11 and the battery cells 12 exposed outside the shell 13, so as to protect the end portions of the hydraulic heat exchange pieces 11 and the battery cells 12 by the protective cover.

[0122] It should be noted that the shell 13 in the embodiment of the present application can be made of metal materials such as aluminum alloy, titanium alloy, high-strength steel, stainless steel, etc., and the shell 13 can also be made of materials such as glass fiber, carbon fiber, aramid fiber reinforced composite materials, etc. In the embodiment of the present application, the specific material of the shell 13 and the thickness of the shell 13 are not limited too much. In actual application, the technical personnel can set them according to the needs.

[0123] Optionally, as shown in FIGS. 9-18, the battery cell 12 in the embodiment of the present application has a first projection on the plane where the hydraulic heat exchange piece 11 is located, and the first projection falls within the plane where the hydraulic heat exchange piece 11 is located.

[0124] The first projection of the battery cell 12 on the plane of the hydraulic heat exchange member 11 is arranged to fall within the plane of the hydraulic heat exchange member 11 in the embodiment of the present application. It can be understood that the battery cell 12 has a first projection on the hydraulic heat exchange member 11 in the direction in which the hydraulic heat exchange members 11 are arranged at intervals, and the first projection falls within the hydraulic heat exchange member 11. That is, the area of the large face of the hydraulic heat exchange member 11 is greater than the area of the large face of the battery cell 12.

[0125] When the heat exchange medium in the hydraulic heat exchange member 11 is pressurized by the booster pump 21, the large face of the hydraulic heat exchange member 11 expands towards the direction close to the battery cell 12, and exerts a constraint force on the battery cell 12. Since the area of the large face of the hydraulic heat exchange member 11 is greater than the area of the large face of the battery cell 12, the entire battery cell 12 can be uniformly stressed.

[0126] Further, the hydraulic heat exchange member 11 is always in close contact with the battery cell 12, and since the hydraulic heat exchange member 11 is of metal material, it has good thermal conductivity. The heat of the heat exchange medium in the hydraulic heat exchange member 11 can be transferred to the entire battery cell 12 by heat transfer, so as to heat or cool the battery cell 12.

[0127] Optionally, as shown in FIGS. 9-18, the battery module in the embodiment of the present application further comprises an end plate 14, wherein the end plate 14 is arranged between the housing 13 and the hydraulic heat exchange member 11 closest to the housing 13 along the first direction X, and the portion of the end plate 14 abutting the housing 13 is adapted to the structure of the corresponding portion of the housing 13; wherein the first direction X is the direction in which the at least two hydraulic heat exchange members 11 are arranged at intervals.

[0128] As shown in FIGS. 9-18, in the embodiment of the present application, the end plate 14 is arranged between the hydraulic heat exchange member 11 closest to the housing 13 and the housing 13 along the first direction X. Wherein, along the first direction X, one side of the end plate 14 abuts the hydraulic heat exchange member 11 closest to the housing 13, and the other side abuts the housing 13, so as to smoothly and uniformly transmit the expansion force of the hydraulic heat exchange member 11 to the housing 13 through the end plate 14.

[0129] The end plate 14 in the embodiment of the present application is a metal piece, which can be processed by extruding aluminum profile, rolling steel profile or metal CNC. Two end plates 14 can be arranged in one battery module 10, and along the first direction X, one end plate 14 is arranged between the hydraulic heat exchange member 11 closest to one side of the housing 13 and the corresponding housing 13, and the other end plate 14 is arranged between the hydraulic heat exchange member 11 closest to the other side of the housing 13 and the corresponding housing 13.

[0130] It should be noted that the part of the end plate 14 abutting against the shell 13 has the same structure as the corresponding part of the shell 13. That is, as shown in FIG. 13, the shell 13 has a first side plate and a second side plate arranged opposite to each other along the first direction X, and a third side plate and a fourth side plate connected between the first side plate and the second side plate, the shell 13 being enclosed by the first side plate, the third side plate, the second side plate, and the fourth side plate, and having a chamfer of a circular arc shape between two adjacent side plates.

[0131] As shown in FIGS. 17 and 18, the end plate 14 has an outer shape similar to a cuboid, and a cross section similar to a ship shape. The end plate 14 has a first side surface and a second side surface arranged opposite to each other along the first direction X, the first side surface abutting against the first side plate, and the second side surface abutting against the hydraulic heat exchange element 11 closest to the shell 13. The area of the outer wall of the end plate 14 close to the first side surface is also provided with a chamfer, so that this area can be adapted to the chamfer of the shell 13, thereby being capable of completely abutting against the shell 13, so that the expansion force of the hydraulic heat exchange element 11 can be smoothly and uniformly transmitted to the shell 13.

[0132] Optionally, as shown in FIGS. 17 and 18, the end plate 14 in the embodiment of the present application has a plurality of hollow parts 141 inside, and the plurality of hollow parts 141 extend along the second direction Y, and the second direction Y intersects the first direction X.

[0133] As shown in FIGS. 17 and 18, the end plate 14 has a plurality of hollow parts 141 inside, and the plurality of hollow parts 141 extend along the second direction Y. By providing a plurality of hollow parts 141 in the end plate 14, the shrinkability of the end plate 14 is enhanced, so that the expansion force of the hydraulic heat exchange element 11 can be prevented from pressing the end plate 14, and the end plate 14 can be prevented from pressing the shell 13, thereby preventing the shell 13 from being damaged.

[0134] Optionally, as shown in FIGS. 9 to 12, the battery module in the embodiment of the present application further comprises a partition plate 15, and the partition plate 15 is arranged between the end plate 14 and the adjacent hydraulic heat exchange element 11 along the first direction X.

[0135] As shown in FIGS. 9 to 12, in the embodiment of the present application, the partition plate 15 is arranged between the end plate 14 and the adjacent hydraulic heat exchange element 11 along the first direction X, so that the partition plate 15 can block the heat conduction of the hydraulic heat exchange element 11 to the end plate 14, and the partition plate 15 can also have an insulating effect.

[0136] It should be noted that the partition plate 15 in the embodiment of the present application is made of an insulating and low-thermal-conductivity material.

[0137] Optionally, as shown in FIGS. 9-12 and 15, the battery module 10 in the embodiment of the application further comprises a first constraint frame 16 and a second constraint frame 17, the first constraint frame 16 is sleeved on one side of the battery cell 12 along the first direction X, the second constraint frame 17 is sleeved on the other side of the battery cell 12, and the first constraint frame 16 is buckled with the second constraint frame 17; wherein the first direction X is the direction in which the at least two hydraulic heat exchange pieces 11 are arranged at intervals.

[0138] As shown in FIGS. 9-12 and 15, along the first direction X, the first constraint frame 16 is sleeved on one side of the battery cell 12, the second constraint frame 17 is sleeved on the other side of the battery cell 12, and the first constraint frame 16 is buckled with the second constraint frame 17, so as to constrain the deformation of the battery cell 12 along the first direction X by the first constraint frame 16 and the second constraint frame 17, and avoid the structure damage of the positive and negative materials and the solid-state electrolyte at the edge of the battery cell 12 during use.

[0139] It should be noted that the first constraint frame 16 and the second constraint frame 17 in the embodiment of the application are made of high-strength non-metallic materials.

[0140] Optionally, as shown in FIGS. 9-12 and 15, in the embodiment of the application, along the second direction Y, the end of the battery cell 12 has a pole core, and the end of the first constraint frame 16 and / or the second constraint frame 17 is provided with a supporting portion 161, and the pole core abuts against the supporting portion 161; wherein the second direction Y intersects the first direction X.

[0141] As shown in FIGS. 9-12 and 15, along the second direction Y, the end of the first constraint frame 16 and / or the second constraint frame 17 has a supporting portion 161, and the end of the battery cell 12 has a pole core, and the pole core abuts against the supporting portion 161, so as to support and protect the pole core by the supporting portion 161.

[0142] The application further discloses a vehicle, which comprises a vehicle body and the battery system 100 described in the above embodiments, and the battery system 100 is connected to the vehicle body.

[0143] It should be noted that in the embodiments of the application, the battery system included in the vehicle has the same structure as the battery system described in the above embodiments, and has similar beneficial effects, which will not be described here.

[0144] It should be noted that each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0145] Although optional embodiments of the present application have been described, those skilled in the art will appreciate that other alterations and modifications to the described embodiments are possible. Accordingly, the appended claims are intended to encompass all alterations and modifications of the described embodiments that fall within the scope of the present application.

[0146] Finally, it should be noted that the terms "first", "second", and the like, herein do not necessarily have any actual meaning such as meaning or implying any actual relationship or order between these entities. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an indefinite article "a" does not exclude the existence, of additional identical elements in the process, method, article, or apparatus comprising the element.

[0147] The above detailed description of the technical solutions provided by the present application has been described in detail, and the principles and implementation modes of the present application are described by applying specific examples. For those skilled in the art, according to the principles and implementation modes of the present application, the specific implementation modes and application scope will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

[0148] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery system (100), characterized by, The battery system (100) comprises: a battery module (10), the battery module (10) comprising at least two hydraulic heat exchange members (11) and a battery cell (12), the at least two hydraulic heat exchange members (11) being arranged at intervals, the battery cell (12) being arranged between two adjacent hydraulic heat exchange members (11), the hydraulic heat exchange member (11) being configured to carry a heat exchange medium, a carrying capacity of the heat exchange medium and / or a temperature of the heat exchange medium being adjustable; a control assembly (60) connected to the hydraulic heat exchange member (11), the control assembly (60) being configured to control the carrying capacity of the heat exchange medium and / or the temperature of the heat exchange medium in the hydraulic heat exchange member (11) to adjust a pressure value applied by the hydraulic heat exchange member (11) to the adjacent battery cell (12) and / or to adjust an amount of heat transferred by the hydraulic heat exchange member (11) to the adjacent battery cell (12).

2. The battery system (100) according to claim 1, characterized in that The battery system (100) further comprises: a pressure assembly (20) connected between the hydraulic heat exchange member (11) and the control assembly (60), the pressure assembly (20) being configured to obtain the pressure value applied by the hydraulic heat exchange member (11) to the adjacent battery cell (12) and adjust the carrying capacity of the heat exchange medium in the hydraulic heat exchange member (11) to adjust the pressure value; a heat exchange assembly (30) connected between the hydraulic heat exchange member (11) and the control assembly (60), the heat exchange assembly (30) being configured to obtain a temperature value of the heat exchange medium in the hydraulic heat exchange member (11) and adjust the temperature of the heat exchange medium to adjust the amount of heat transferred by the hydraulic heat exchange member (11) to the adjacent battery cell (12); the control assembly (60) being configured to obtain the pressure value and the temperature value and control the pressure assembly (20) to adjust the pressure value and / or control the heat exchange assembly (30) to adjust the temperature value.

3. The battery system (100) according to claim 1 or 2, characterized in that The hydraulic heat exchange member (11) comprises a first metal plate and a second metal plate, wherein a circumferential side of the first metal plate is connected to a circumferential side of the second metal plate, the first metal plate and the second metal plate enclosing a containing cavity configured to carry the heat exchange medium, a carrying capacity of the heat exchange medium in the containing cavity and / or a temperature of the heat exchange medium being adjustable.

4. The battery system (100) according to claim 3, characterized in that The heat exchange assembly (30) comprises a heat exchanger (31), wherein the containing cavity has a first end and a second end arranged oppositely, one end of the heat exchanger (31) is connected to the first end, and the other end of the heat exchanger (31) is connected to the second end.

5. The battery system (100) according to claim 4, characterized in that The heat exchange assembly (30) further comprises a circulating pump (32), a heater (33), and a temperature sensor (34), wherein the circulating pump (32), the heater (33), and the temperature sensor (34) are sequentially connected between the heat exchanger (31) and the hydraulic heat exchange member (11).

6. The battery system (100) of claim 4, wherein, The pressure assembly (20) comprises a pressure pump (21) and a pressure sensor (22), wherein The booster pump (21) and the pressure sensor (22) are sequentially connected between the heat exchanger (31) and the hydraulic heat exchange element (11).

7. The battery system (100) of claim 2, wherein, The battery system (100) further comprises a first manifold (40) and a second manifold (41), wherein, The hydraulic heat exchange element (11) has a containing cavity therein, the containing cavity has oppositely arranged first and second ends, the first end has a first opening (111), and the second end has a second opening (112); The first manifold (40) has at least two first branch openings (401) and a first collecting opening (402), each first branch opening (401) is connected to the first opening (111) of one hydraulic heat exchange element (11), and the first collecting opening (402) is connected to one end of the heat exchange assembly (30); The second manifold (41) has at least two second branch openings and a second collecting opening, each second branch opening is connected to the second opening (112) of one hydraulic heat exchange element (11), and the second collecting opening is connected to the other end of the heat exchange assembly (30).

8. The battery system (100) according to any one of claims 1-7, characterized by, The battery system (100) comprises an adapter pipe (50), wherein, The hydraulic heat exchange element (11) has a containing cavity therein, the containing cavity has oppositely arranged first and second ends, the first end has a first opening (111), and the second end has a second opening (112); In two adjacent hydraulic heat exchange elements (11), one end of the adapter pipe (50) is connected to the first opening (111) of one hydraulic heat exchange element (11), and the other end is connected to the first opening (111) of the other hydraulic heat exchange element (11), Alternatively, one end of the adapter pipe (50) is connected to the second opening (112) of one hydraulic heat exchange element (11), and the other end is connected to the second opening (112) of the other hydraulic heat exchange element (11); In the direction of the interval arrangement of the at least two hydraulic heat exchange elements (11), the hydraulic heat exchange element (11) closest to the outside is connected to the heat exchange assembly (30).

9. A battery module (10) characterized by A battery module (10) comprising the battery system (100) of any one of claims 1-8.

10. The battery module (10) according to claim 9, characterized in that The battery module (10) further comprises a housing (13), the housing (13) has a ring structure, the housing (13) is sleeved on the outside of the at least two hydraulic heat exchange elements (11), and the end of the hydraulic heat exchange element (11) is exposed to the housing (13) in the second direction; At least two hydraulic heat exchange elements (11) are arranged at intervals in the first direction, and the second direction intersects the first direction.

11. The battery module (10) according to claim 9, characterized in that The electric core (12) has a first projection on the plane of the hydraulic heat exchange element (11), and the first projection falls within the plane of the hydraulic heat exchange element (11).

12. The battery module (10) according to claim 10, characterized in that The battery module (10) further comprises an end plate (14), wherein, The end plate (14) is arranged between the housing (13) and the hydraulic heat exchange element (11) closest to the housing (13) in the first direction, and the part of the end plate (14) abutting the housing (13) is structurally adapted to the corresponding part of the housing (13). The first direction is the direction in which the at least two hydraulic heat exchange elements (11) are arranged at intervals.

13. The battery module (10) according to claim 12, characterized in that The end plate (14) has a plurality of hollow parts (141) therein, and the plurality of hollow parts (141) extend in a second direction. The second direction intersects the first direction.

14. The battery module (10) according to any one of claims 12-13, characterized by The battery module (10) further comprises a partition plate (15), which is arranged between the end plate (14) and the adjacent hydraulic heat exchange element (11) in the first direction.

15. The battery module (10) according to any one of claims 9-14, characterized by The battery module (10) further comprises a first constraint frame (16) and a second constraint frame (17), The first constraint frame (16) is sleeved on one side of the battery cell (12) and the second constraint frame (17) is sleeved on the other side of the battery cell (12) in the first direction, and the first constraint frame (16) is buckled with the second constraint frame (17). The first direction is the direction in which the at least two hydraulic heat exchange elements (11) are arranged at intervals.

16. The battery module (10) according to claim 15, characterized in that The end of the battery cell (12) has a pole core in the second direction, and the end of the first constraint frame (16) and / or the second constraint frame (17) is provided with a support part (161), and the pole core abuts the support part (161). The second direction intersects the first direction.

17. A vehicle characterized by comprising: The vehicle comprises a vehicle body and the battery system (100) according to any one of claims 1-8, and the battery system (100) is connected to the vehicle body.

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