Thermal management assembly, thermal management system and battery

Abstract

The invention provides a thermal management assembly, a thermal management system and a battery. The heat management assembly comprises a plurality of heat management parts, one heat management part is a first heat management part, and the other heat management parts are second heat management parts; the area of at least part of the overflowing cross section of the main flow channel of the first heat management part is smaller than that of the overflowing cross section of the main flow channel of the second heat management part. According to the application, the flow of the heat exchange medium in the first heat management part can be reduced, and the flow in the second heat management part can be increased, so that the consistency of the heat management efficiency of the isolated zero battery cell column and the heat management efficiency of the grouped battery cell column can be improved. Therefore, on the basis of ensuring the energy density of the battery and ensuring that each battery cell column is provided with the thermal management part, the uniformity of the thermal management assembly on the temperature management of the battery cells can be improved, so that the consistency of the grouped battery cell columns and the isolated zero battery cell columns in the aspects of charging and discharging, battery capacity attenuation, mechanical stress and the like is improved. Finally, the reliability of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a thermal management component, a thermal management system and a battery. Background Art

[0002] In order to maintain the battery operating within a suitable temperature range, it is necessary to configure a temperature management system for the battery to heat up or cool down the battery. In the related art, the temperature management system includes a pipeline, a thermal management component connected to the pipeline, and a temperature regulation module for regulating the temperature of the heat exchange medium in the pipeline. Among them, the thermal management component includes a plurality of heat pipe components, and the plurality of heat pipe components are connected in parallel to the pipeline. The thermal management component is thermally coupled with the battery cell array to perform temperature piping on the battery cell array.

[0003] In the related art, the reliability of the battery is poor. Summary of the invention

[0004] The embodiments of the present application provide a thermal management component, a thermal management system and a battery, which can improve the reliability of the battery.

[0005] In a first aspect, an embodiment of the present application provides a thermal management component, which includes a thermal management component, the thermal management component having a main channel, and the two ends of the main channel are respectively a first port and a second port; there are multiple thermal management components, and the multiple thermal management components are arranged in sequence along a first direction, one of the multiple thermal management components is a first thermal management component, and the rest are second thermal management components; the first port of each thermal management component is respectively connected to the first port of the thermal management component adjacent thereto, and the second port of each thermal management component is respectively connected to the second port of the thermal management component adjacent thereto; wherein, one side wall of the first thermal management component is configured to exchange heat with a heat source, and the two side walls of the second thermal management component are configured to exchange heat with a heat source; the area of ​​at least part of the flow cross-section of the main channel of the first thermal management component is smaller than the area of ​​the flow cross-section of the main channel of the second thermal management component.

[0006] In one embodiment, the portion of the main channel close to the first port and the portion close to the second port are both end channels; the flow cross section area of ​​the end channel of the first thermal management component is smaller than the flow cross section area of ​​the end channel of the second thermal management component.

[0007] In one embodiment, the flow cross section area of ​​the end flow channel of the second thermal management component is S1, and the flow cross section area of ​​the end flow channel of the first thermal management component is S2, satisfying: 19% S1≤S2≤40% S1.

[0008] In one embodiment, the cross section of the end channel is circular, the diameter of the end channel of the second thermal management component is φA, and the diameter of the end channel of the first thermal management component is φB, satisfying: 50% φA≤φB≤70% φA.

[0009] In one embodiment, the heat management component includes a current collector and a heat management plate, the current collector includes a main body and a first nozzle and a second nozzle connected to the main body, the inner hole of the first nozzle and the inner hole of the second nozzle are both end flow channels; the main body is provided with a first cavity and a second cavity; the heat management plate has a U-shaped exchange flow channel, one end of the heat management plate is connected to the current collector, and the two ends of the exchange flow channel are respectively connected to the first cavity and the second cavity;

[0010] The heat management components located at both ends of the first direction are terminal heat management components, and the remaining heat management components are intermediate heat management components; in each intermediate heat management component: two first nozzles are respectively located on both sides of the current collector, and the end flow channels of the first nozzles are both connected to the first cavity; two second nozzles are respectively located on both sides of the current collector, and the end flow channels of the second nozzles are both connected to the second cavity;

[0011] In each terminal heat management component: a flow passage at the end of a first nozzle is communicated with a first cavity corresponding thereto, and a flow passage at the end of a second nozzle is communicated with a second cavity corresponding thereto;

[0012] Among them, in each thermal management component, the first cavity, the second cavity, the end flow channel and the exchange flow channel jointly define the main flow channel, the end of the end flow channel of the first nozzle away from the first cavity is the first port, and the end of the end flow channel of the second nozzle away from the second cavity is the second port.

[0013] In one embodiment, the thermal management component also includes a first main pipe, and a current collector of a thermal management component is provided with a first connecting hole and a second connecting hole, the two sides of the first connecting hole are respectively connected to the first cavity and the second cavity, and the second connecting hole is connected to the second cavity; one end of the thermal management plate is plugged into the first connecting hole, and one end of the first main pipe is plugged into the second connecting hole.

[0014] In one embodiment, along the first direction, the first connecting hole has a width dimension X, and the end of the inner hole of the first main pipe close to the second cavity has a width dimension Y, satisfying: X<Y≤10X.

[0015] In one embodiment, the end of the inner hole of the first main pipe away from the second cavity has a diameter φZ, which satisfies: Y+2mm≤φZ≤5Y.

[0016] In one embodiment, the thermal management component further includes a second main pipe, one end of which is connected to the first cavity of a collector of a second thermal management component, the inner diameter of the second main pipe is φC, and the inner diameter of the first nozzle of the second thermal management component is φA, satisfying: φC>φA.

[0017] In one embodiment, the thermal management component also includes a plurality of first bellows and a plurality of second bellows; the plurality of first bellows are staggered with the plurality of thermal management components, and the two ends of each first bellows are respectively connected to the first port of the thermal management component adjacent thereto; the plurality of second bellows are staggered with the plurality of thermal management components, and the two ends of each second bellows are respectively connected to the second port of the thermal management component adjacent thereto.

[0018] In one embodiment, a thermal management component located at one end of the first direction is the first thermal management component.

[0019] In one embodiment, the first thermal management component has a first side wall and a second side wall disposed opposite to the first side wall, and the first side wall is configured to exchange heat with a heat source; wherein the second side wall is provided with a thermal insulation layer, and / or the wall thickness of the second side wall is greater than the wall thickness of the first side wall.

[0020] In the second aspect, an embodiment of the present application provides a thermal management system, which includes a liquid inlet pipe, a liquid outlet pipe, a temperature adjustment module and the aforementioned thermal management component; the liquid inlet pipe is connected to one of the first port and the second port; the liquid outlet pipe is connected to the other of the first port and the second port; the two ports of the temperature adjustment module are respectively connected to the liquid inlet pipe and the liquid outlet pipe, and the temperature adjustment module is used to adjust the temperature of the heat exchange medium from the liquid outlet pipe and send the adjusted heat exchange medium to the liquid inlet pipe.

[0021] In a third aspect, an embodiment of the present application provides a battery, which includes a case, an isolated cell row, a plurality of cell groups and the aforementioned thermal management system; the case has an installation cavity; the thermal management component, an end of a liquid inlet pipe close to the thermal management component and an end of a liquid outlet pipe close to the thermal management component are all arranged in the installation cavity; the isolated cell row is located on one side of a first thermal management component and is thermally coupled to the first thermal management component; the plurality of cell groups are arranged in a one-to-one correspondence with the plurality of second thermal management components; the cell groups include two first cell rows, and the two first cell rows of each cell group are respectively located on both sides of the corresponding second thermal management component.

[0022] Beneficial effects of the embodiments of the present application:

[0023] In the embodiment of the present application, by making the area of ​​part of the flow cross section of the main flow channel of the first thermal management component smaller than the area of ​​the flow cross section of the main flow channel of the second thermal management component, the flow of the heat exchange medium in the first thermal management component can be reduced, and the flow in the second thermal management component can be increased, thereby improving the consistency of the thermal management efficiency of the isolated battery cell column and the thermal management efficiency of the grouped battery cell column. In this way, on the basis of ensuring the battery energy density and each battery cell column is equipped with a thermal management component, the uniformity of the temperature management of the battery cell by the thermal management component can be improved, so as to improve the consistency of the grouped battery cell column and the isolated battery cell column in terms of charging and discharging, battery capacity attenuation, mechanical stress, etc. Ultimately, the reliability of the battery can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a schematic diagram of the structure of a thermal management component provided in an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the structure of a thermal management component provided in an embodiment of the present application;

[0027] Figure 3 is along Figure 2 Sectional view of AA in the middle;

[0028] Figure 4 is a schematic structural diagram of an end flow channel of a first thermal management component provided in an embodiment of the present application;

[0029] Figure 5 is a schematic structural diagram of an end flow channel of a second thermal management component provided in an embodiment of the present application;

[0030] Figure 6 is a schematic diagram of the structure of a thermal management plate provided in an embodiment of the present application;

[0031] Figure 7 is a schematic structural diagram of a thermal management component connected to a first main pipeline provided in an embodiment of the present application;

[0032] Figure 8 yes Figure 7 Cross-sectional view of the middle BB;

[0033] Fig. 9 is a schematic structural diagram of a heat management component connected to a second main pipeline provided in an embodiment of the present application;

[0034] Fig.10 is along Fig. 9 Cross-sectional view of CC;

[0035] Fig.11 yes Figure 1 The enlarged view of point D in the middle;

[0036] Fig.12 is a schematic diagram of the structure of a thermal management system provided in an embodiment of the present application;

[0037] Fig.13 It is a schematic diagram of the structure of a battery provided in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1- thermal management component; 11- thermal management component; 12- main flow channel; 121- first port; 122- second port; 123- end flow channel; 13- first thermal management component; 14- second thermal management component;

[0040] 15-current collector; 151-main body; 152-first nozzle; 153-second nozzle; 154-first cavity; 155-second cavity; 156-first connecting hole; 157-second connecting hole;

[0041] 16-heat management plate; 161-exchange flow channel;

[0042] 171 - first main pipeline; 172 - second main pipeline; 181 - first corrugated pipe; 182 - second corrugated pipe;

[0043] 2- thermal management system; 21- liquid inlet pipe; 22- liquid outlet pipe; 23- temperature adjustment module;

[0044] 3-battery; 31-box; 311-installation cavity; 32-isolated battery cell row; 33-battery cell group; 331-first battery cell row. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0046] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The terms "comprises," "comprising," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a product that includes a list of elements includes not only those elements, but also includes other elements not expressly listed or that are inherent to such product.

[0050] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0051] To facilitate understanding of the solution of the present application, before introducing a thermal management component, a thermal management system and a battery provided in an embodiment of the present application, the relevant technologies involved in the present application are first described.

[0052] In the related art, the thermal management component includes a plurality of heat pipe components, and the plurality of heat pipe components are connected in parallel in the pipeline. The thermal management component has a flow channel for the circulation of heat exchange medium. The thermal management component is thermally coupled to the battery cell column to perform temperature piping on the battery cell column. The battery cell column includes a plurality of battery cells arranged in sequence along the length direction of the flow channel. In the layout of some batteries, every two columns of battery cells are used as a battery cell group, and a double-sided heat exchange thermal management component is arranged between the two battery cell columns in each battery cell group, so that the two battery cell columns in each battery cell group share a thermal management component. In this way, the battery can have more battery cell layout space to improve the energy density of the battery, and each battery cell column can be temperature-regulated by the thermal management component.

[0053] Limited by the layout space of the battery and in order to ensure the capacity density of the battery, in some battery layouts, it is necessary to layout multiple cell groups and an isolated cell column. In order to improve the operating temperature of the isolated cell column, it is necessary to configure a thermal management component for the isolated cell column for temperature management. In this way, the temperature management component configured for the isolated cell column is in a single-sided heat exchange state, which leads to a higher thermal management efficiency in the isolated cell column than in the grouped cell column. In this way, not only will the flow of the heat exchange medium configured for the isolated cell column be redundant and there will be flow waste, but also the thermal management component will have poor uniformity in the temperature management of the cell, resulting in a large temperature difference between the grouped cell column and the isolated cell column, resulting in poor temperature uniformity inside the battery. Ultimately, there will be large differences between the grouped cell column and the isolated cell column in terms of charging and discharging, battery capacity attenuation, mechanical stress, etc., resulting in low reliability of the battery.

[0054] Therefore, how to reasonably set up a thermal management system to improve the reliability of the battery on the basis of ensuring the energy density of the battery is a problem to be solved by the embodiments of the present application.

[0055] Based on this, the embodiments of the present application provide a thermal management component, a thermal management system and a battery, which can improve the consistency of the thermal management efficiency of an isolated battery cell column and the thermal management efficiency of a grouped battery cell column, thereby improving the uniformity of the temperature management of the battery cells by the thermal management component, so as to improve the consistency of the grouped battery cell column and the isolated battery cell column in charging and discharging, battery capacity attenuation, mechanical stress, etc., and thus improve the reliability of the battery.

[0056] This application describes a thermal management component, a thermal management system and a battery in detail through the following contents.

[0057] See also Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of a thermal management component 1 provided in an embodiment of the present application, Figure 2 is a schematic diagram of the structure of a thermal management component provided in an embodiment of the present application, Figure 3is along Figure 2 AA cross-sectional view in the figure. An embodiment of the present application provides a thermal management component 1. The thermal management component 1 includes a thermal management component 11. The thermal management component 11 has a main channel 12. The two ends of the main channel 12 are a first port 121 and a second port 122, respectively. There are multiple thermal management components 11. The multiple thermal management components 11 are arranged in sequence along the first direction. One of the multiple thermal management components 11 is a first thermal management component 13. The rest are second thermal management components 14. The first port 121 of each thermal management component 11 is respectively connected to the first port 121 of the thermal management component 11 adjacent thereto. The second port 122 of each thermal management component 11 is respectively connected to the second port 122 of the thermal management component 11 adjacent thereto. Among them, one side wall of the first thermal management component 13 is configured to exchange heat with a heat source. The two side walls of the second thermal management component 14 are configured to exchange heat with a heat source. The area of ​​at least part of the flow cross section of the main channel 12 of the first thermal management component 13 is smaller than the area of ​​the flow cross section of the main channel 12 of the second thermal management component 14.

[0058] It can be understood that the first thermal management component 13 is used for thermal management of isolated battery cell columns, and the second thermal management component 14 is used for thermal management of grouped battery cell columns.

[0059] It is understandable that the first heat management component 13 may be located at one end of the first direction, or between any two second heat management components 14. The location of the first heat management component 13 may be adjusted according to the application scenario, and this embodiment does not limit this.

[0060] It can be understood that the first heat-management component 13 and the second heat-management component 14 are used to distinguish the plurality of heat-management components 11 because of the difference in specific usage states, not because of the difference in the structure of the heat-management component 11 itself.

[0061] It can be understood that the flow cross section of the flow channel refers to the cross section perpendicular to the flow direction of the fluid when the fluid flows in the flow channel. The shape of the flow cross section of the flow channel has different designs according to different scenarios. For example, the flow cross section of the flow channel can be circular or rectangular.

[0062] It can be understood that the size of the flow cross section has an important influence on the flow characteristics of the fluid. A larger flow cross section can flow more heat exchange medium; while a smaller flow cross section can flow less heat exchange medium.

[0063] Therefore, in the embodiment of the present application, by setting the area of ​​part of the flow cross section of the main channel 12 of the first thermal management component 13 to be smaller than the area of ​​the flow cross section of the main channel 12 of the second thermal management component 14, the flow of the heat exchange medium in the first thermal management component 13 can be reduced, thereby reducing the redundancy of the flow of the heat exchange medium configured for the isolated battery cell column to reduce the flow waste, and increasing the flow in the second thermal management component 14, thereby improving the consistency of the thermal management efficiency of the isolated battery cell column and the thermal management efficiency of the grouped battery cell column. In this way, on the basis of ensuring the battery energy density and each battery cell column is equipped with a thermal management component 11, the uniformity of the temperature management of the battery cell by the thermal management component 1 can be improved, so as to improve the consistency of the grouped battery cell column and the isolated battery cell column in terms of charging and discharging, battery capacity attenuation, mechanical stress, etc. Ultimately, the reliability of the battery can be improved.

[0064] The reduction amount of the flow cross section of the first thermal management component 13 relative to the flow cross section of the second thermal management component 14 can be adjusted according to the length, cross-sectional area, extension direction of the main channel 12, fluid pressure, and application scenario of the battery 3.

[0065] See also Figure 4 and Figure 5 , Figure 4 is a schematic structural diagram of the end flow channel 123 of the first thermal management component 13 provided in an embodiment of the present application, Figure 5 1 is a schematic diagram of the structure of the end flow channel 123 of the second thermal management component 14 provided in an embodiment of the present application. In one embodiment, the portion of the main flow channel 12 close to the first port 121 and the portion close to the second port 122 are both the end flow channels 123. The area of ​​the flow cross section of the end flow channel 123 of the first thermal management component 13 is smaller than the area of ​​the flow cross section of the end flow channel 123 of the second thermal management component 14.

[0066] In this way, not only the consistency of the thermal management efficiency of the isolated cell row 32 and the thermal management efficiency of the grouped cell row can be improved, but also the uniformity of the flow inside the first thermal management component 13 can be improved, so as to improve the uniformity of the thermal management of each cell in the isolated cell row 32 by the first thermal management component 13.

[0067] In one embodiment, the flow cross section area of ​​the end channel 123 of the second thermal management component 14 is S1, and the flow cross section area of ​​the end channel 123 of the first thermal management component 13 is S2, satisfying: 19% S1≤S2≤40% S1.

[0068] It can be understood that the area S2 of the flow cross section of the end flow channel 123 of the first thermal management component 13 includes but is not limited to 19% S1, 22% S1, 25% S1, 28% S1, 30% S1, 35% S1, 36% S1, 38% S1, 39% S1, and 40% S1.

[0069] In the embodiments of the present application, through the above-mentioned limitation, the area of ​​part of the flow cross section of the main flow channel 12 of the first thermal management component 13 can be made smaller than the area of ​​the flow cross section of the main flow channel 12 of the second thermal management component 14, and the flow cross section area of ​​the end flow channel 123 of the first thermal management component 13 can be avoided to be too small, thereby effectively ensuring the thermal management effect of the first thermal management component 13 on the isolated battery cell array.

[0070] In one embodiment, the cross section of the end channel 123 is circular, the diameter of the end channel 123 of the second thermal management component 14 is φA, and the diameter of the end channel 123 of the first thermal management component 13 is φB, satisfying: 50% φA≤φB≤70% φA.

[0071] It can be understood that the diameter φB of the end flow channel 123 of the first heat management component 13 includes but is not limited to 50% φA, 52% φA, 55% φA, 60% φA, 64% A, 67% A, and 70% φA.

[0072] In this embodiment, through the above-mentioned limitation, the area of ​​part of the flow cross section of the main channel 12 of the first thermal management component 13 can be made smaller than the area of ​​the flow cross section of the main channel 12 of the second thermal management component 14, and the diameter of the end channel 123 of the first thermal management component 13 can be avoided to be smaller, thereby effectively ensuring the thermal management effect of the first thermal management component 13 on the isolated battery cell array.

[0073] In addition, in this embodiment, by setting the cross-section of the end flow channel 123 to be circular, the portion of the thermal management component 11 used to form the end flow channel 123 has a higher structural strength, so that when it is subjected to internal fluid pressure, the stress distribution can be more uniform through the wall of the cylindrical structure.

[0074] See also Figure 2 and Figure 6 , Figure 6 1 is a schematic diagram of the structure of the thermal management plate 16 provided in an embodiment of the present application. In one embodiment, the thermal management component 11 includes a current collector 15 and a thermal management plate 16. The current collector 15 includes a main body 151 and a first nozzle 152 and a second nozzle 153 connected to the main body 151. The inner hole of the first nozzle 152 and the inner hole of the second nozzle 153 are both end flow channels 123. The main body 151 is provided with a first cavity 154 and a second cavity 155. The thermal management plate 16 has a U-shaped exchange flow channel 161. One end of the thermal management plate 16 is connected to the current collector 15. Both ends of the exchange flow channel 161 are connected to the first cavity 154 and the second cavity 155, respectively.

[0075] The heat management components 11 at both ends of the first direction are terminal heat management components, and the remaining heat management components 11 are intermediate heat management components. In each intermediate management component: two first nozzles 152 are respectively located on both sides of the current collector 15, and the end flow channels 123 of the first nozzles 152 are both connected to the first cavity 154; two second nozzles 153 are respectively located on both sides of the current collector 15, and the end flow channels 123 of the second nozzles 153 are both connected to the second cavity 155.

[0076] In each terminal heat management component: the end flow channel 123 of a first nozzle 152 is communicated with the corresponding first cavity, and the end flow channel 123 of a second nozzle 153 is communicated with the corresponding second cavity.

[0077] In each thermal management component 11, the first cavity 154, the second cavity 155, the end flow channel 123 and the exchange flow channel 161 together define the main flow channel 12. The end of the end flow channel 123 of the first nozzle 152 away from the first cavity 154 is the first port 121. The end of the end flow channel 123 of the second nozzle 153 away from the second cavity 155 is the second port 122.

[0078] It can be understood that the portion where the first nozzle 152 and the second nozzle 153 are connected to the main body 151 should be sealed to prevent the heat exchange medium from leaking from the portion.

[0079] It can be understood that one of the first chamber 154 and the second chamber 155 is used to deliver the exchange medium into the exchange channel 161 , and the other is used to discharge the exchange medium in the exchange channel 161 .

[0080] Exemplarily, the first nozzle 152 and the second nozzle 153 are welded to the main body 151, or the first nozzle 152 and the second nozzle 153 are integrally formed with the main body 151, or the first nozzle 152 and the second nozzle 153 are plugged into the main body 151, and a sealing ring is provided at the plugged position to prevent leakage of the heat exchange medium.

[0081] In this embodiment, through the above scheme, the liquid inlet and the liquid outlet of the thermal management component 11 are located on the same side, which not only makes the thermal management component 11 have better temperature uniformity in managing the battery cell, but also reduces the length direction of the main channel 12 of the thermal management component 11, thereby helping to reduce the space occupied by the thermal management system in the battery.

[0082] See also Figure 1 , Figure 7 and Figure 8 , Figure 7 1 is a schematic diagram of the structure of the heat management component 11 connected to the first main pipeline 171 provided in an embodiment of the present application. Figure 8 yes Figure 7In one embodiment, the thermal management assembly 1 further includes a first main pipe 171. The current collector 15 of the thermal management component 11 is provided with a first connection hole 156 and a second connection hole 157. Both sides of the first connection hole 156 are respectively connected to the first cavity 154 and the second cavity 155. The second connection hole 157 is connected to the second cavity 155. One end of the thermal management plate 16 is plugged into the first connection hole 156, and one end of the first main pipe 171 is plugged into the second connection hole 157.

[0083] It can be understood that the first main pipeline 171 can be sealed and welded, sealed and glued, or integrally formed with the current collector 15.

[0084] It can be understood that when the first main pipe 171 is used to deliver the heat exchange medium to the main channel 12, the first main pipe 171 is the liquid inlet pipe, and the second cavity 155 is the liquid inlet cavity. Correspondingly, the first cavity 154 is the liquid discharge cavity. Conversely, when the main channel 12 discharges the heat exchange medium into the first main pipe 171, the first main pipe 171 is the liquid discharge pipe, and the second cavity 155 is the liquid discharge cavity. Correspondingly, the first cavity 154 is the liquid inlet cavity.

[0085] In this embodiment, the above arrangement makes the overall structure simple and easy to manufacture, thereby improving manufacturing efficiency and controlling manufacturing costs.

[0086] See also Figure 8 In one embodiment, along the first direction, the first connecting hole 156 has a width dimension X, and the inner hole of the first main pipe 171 at one end close to the second cavity 155 has a width dimension Y, satisfying: X<Y≤10X.

[0087] It can be understood that the width dimension Y of the inner hole of the first main pipe 171 at one end close to the second cavity 155 includes but is not limited to 1.1X, 2X, 2.2X, 3X, 3.5X, 4X, 4.8X, 5X, 5.5X, 6X, 7X, 8X, 9X, and 10X.

[0088] In this embodiment, the space around the heat management component 11 where no battery cells are arranged can be fully utilized, so that the inner hole of the first main pipe 171 close to the end of the second cavity 155 is enlarged relative to the first connecting hole 156. In this way, the flow resistance of the heat exchange medium in this part can be reduced, and the liquid inlet or discharge efficiency of the thermal management system 2 can be improved.

[0089] Specifically, the first main pipe 171 is a drainage pipe.

[0090] See also Figure 8 In one embodiment, the end of the inner hole of the first main pipe 171 away from the second cavity 155 has a diameter φZ, which satisfies: Y+2mm≤φZ≤5Y.

[0091] Among them, the inner hole diameter φZ of the first main pipe 171 includes but is not limited to Y+2mm, 2Y, 2.5Y, 3Y, 3.2Y, 3.5Y, 3.8Y, 4Y, 4.2Y, 4.5Y, 4.6Y, 4.8Y, and 5Y.

[0092] In this embodiment, the space around the heat management component 11 where no battery cells are arranged can be fully utilized, so that the end of the inner hole of the first main pipe 171 away from the second cavity 155 is enlarged relative to the end close to the second cavity 155. In this way, the flow resistance of the heat exchange medium in this part can be reduced, and the liquid inlet or liquid discharge efficiency of the thermal management system can be improved.

[0093] See also Fig. 9 and Fig.10 , Fig. 9 1 is a schematic diagram of the structure of the heat management component 11 connected to the second main pipe 172 provided in an embodiment of the present application. Fig.10 is along Fig. 9 In one embodiment, the thermal management assembly 1 further comprises a second main conduit 172. One end of the second main conduit 172 is connected to the first cavity 154 of the current collector 15 of a second thermal management component 14. The inner diameter of the second main conduit 172 is φC, and the inner diameter of the first nozzle 152 of the second thermal management component 14 is φA, satisfying: φC>φA.

[0094] It can be understood that the second main pipeline 172 can be sealed and welded with the current collector 15, sealed and glued, or integrally formed.

[0095] It can be understood that when the second main pipe 172 is used to deliver the heat exchange medium to the main channel 12, the second main pipe 172 is a liquid inlet pipe, and the first cavity 154 is a liquid inlet cavity. Correspondingly, the second cavity 155 is a liquid discharge cavity. Conversely, when the main channel 12 discharges the heat exchange medium into the second main pipe 172, the second main pipe 172 is a liquid discharge pipe, and the first cavity 154 is a liquid discharge cavity. Correspondingly, the second cavity 155 is a liquid inlet cavity.

[0096] In this embodiment, through the above arrangement, the space around the heat management component 11 where no battery cells are arranged can be fully utilized, so that the inner hole of the second main pipe 172 is set larger than the inner diameter of the first nozzle 152. In this way, the flow resistance of the heat exchange medium in this part can be reduced, and the liquid inlet or liquid discharge efficiency of the thermal management system can be improved.

[0097] Specifically, the second main pipe 172 is a liquid inlet pipe, which is connected to the current collector 15 of the second heat-management component 14 away from the first heat-management component 11 .

[0098] Optionally, the second main pipeline 172 is an L-shaped pipeline, which includes two pipe sections arranged at an angle, one pipe section is parallel to the first direction, and the other pipe section is parallel to the length direction of the main channel 12 .

[0099] See also Fig.11 , Fig.11 yes Figure 1 In one embodiment, the thermal management assembly 1 further includes a plurality of first bellows 181 and a plurality of second bellows 182. The plurality of first bellows 181 are staggered with the plurality of thermal management components 11, and the two ends of each first bellows 181 are respectively connected to the first port 121 of the thermal management component 11 adjacent thereto. The plurality of second bellows 182 are staggered with the plurality of thermal management components 11, and the two ends of each second bellows 182 are respectively connected to the second port 122 of the thermal management component 11 adjacent thereto.

[0100] The two ends of the first bellows 181 are respectively expanded with the first nozzle 152 of the adjacent heat management element 11. Specifically, the end of the first nozzle 152 away from the current collector 15 connected thereto is inserted into the first bellows 181 and sealed therewith through a sealing ring.

[0101] Both ends of the second bellows 182 are respectively expanded with the second nozzles 153 of the adjacent heat management element 11. Specifically, one end of the second nozzle 153 away from the current collector 15 connected thereto is inserted into the second bellows 182 and sealed therewith via a sealing ring.

[0102] In this embodiment, by providing a first bellows 181 and a second bellows 182 to connect two adjacent thermal management components 11, the length adjustability of the first bellows 181 and the second bellows 182 can be used to absorb assembly tolerance and material tolerance, thereby reducing the difficulty of assembling the thermal management component 1 and improving assembly efficiency.

[0103] In one embodiment, a thermal management component 11 located at one end of the first direction is the first thermal management component 13. Thus, before the thermal management assembly 1 is thermally coupled to the battery cell array, by arranging the first thermal management component 13 at one end of the first direction, it is convenient for relevant operators to quickly determine the position of the first thermal management component 13 according to the arrangement sequence of the thermal management components 11, so as to improve the convenience of inspection, testing or maintenance operations.

[0104] In one embodiment, the first thermal management component 13 has a first side wall and a second side wall disposed opposite to the first side wall. The first side wall is configured to exchange heat with a heat source. The second side wall is provided with a heat insulation layer, and / or the wall thickness of the second side wall is greater than the wall thickness of the first side wall.

[0105] Specifically, the second side wall is provided with a heat insulation layer, or the wall thickness of the second side wall is greater than the wall thickness of the first side wall, or the second side wall is provided with a heat insulation layer and the wall thickness of the second side wall is greater than the wall thickness of the first side wall.

[0106] In this embodiment, by providing a heat insulation layer and / or a thickening setting, the efficiency of heat exchange between the side wall of the first thermal management component 13 that is not thermally coupled to the heat source and the surrounding environment can be reduced, thereby effectively avoiding energy waste of the thermal management component and improving the heat exchange efficiency of the thermal management component.

[0107] See also Figures 1 to 12 , Fig.12 : is a schematic diagram of the structure of the thermal management system 2 provided by the embodiment of the present application. Accordingly, the embodiment of the present application provides a thermal management system 2. The thermal management system 2 includes a liquid inlet pipe 21, a liquid outlet pipe 22, a temperature adjustment module 23 and the aforementioned thermal management component 1. The liquid inlet pipe 21 is connected to one of the first port 121 and the second port 122. The liquid outlet pipe 22 is connected to the other of the first port 121 and the second port 122. The two ports of the temperature adjustment module 23 are respectively connected to the liquid inlet pipe and the liquid outlet pipe 22. The temperature adjustment module 23 is used to adjust the temperature of the heat exchange medium from the liquid outlet pipe 22, and send the adjusted heat exchange medium to the liquid inlet pipe 21.

[0108] It can be understood that the temperature adjustment module 23 may include a compressor, a condenser, an evaporator, etc. connected by pipelines, and be configured with a valve body to achieve cooling or heating of the battery cell.

[0109] In this embodiment, by adopting the thermal management component 1 of the above-mentioned embodiment, the consistency of the thermal management efficiency of the isolated battery cell column 32 and the thermal management efficiency of the grouped battery cell column can be improved. In this way, on the basis of ensuring the energy density of the battery 3 and each battery cell column is equipped with a thermal management component 11, the uniformity of the temperature management of the battery cell by the thermal management component 1 can be improved, so as to improve the consistency of the grouped battery cell column and the isolated battery cell column in terms of charging and discharging, battery capacity attenuation, mechanical stress, etc. Ultimately, the reliability of the battery can be improved.

[0110] See also Fig.13 , Fig.13 : is a schematic diagram of the structure of the battery 3 provided in the embodiment of the present application. The embodiment of the present application provides a battery 3. The battery 3 includes a case 31, an isolated cell row 32, a plurality of cell groups 33 and the aforementioned thermal management system 2. The case 31 has an installation cavity 311. The thermal management component 1, one end of the liquid inlet pipe 21 close to the thermal management component 1 and one end of the liquid outlet pipe 22 close to the thermal management component 1 are all arranged in the installation cavity 311. The isolated cell row 32 is located on one side of the first thermal management component 11 and is thermally coupled to the first thermal management component 11. The plurality of cell groups 33 are arranged in a one-to-one correspondence with the plurality of second thermal management components 14. The cell group 33 includes two first cell rows 331, and the two first cell rows 331 of each cell group 33 are respectively located on both sides of the corresponding second thermal management component 14.

[0111] In this embodiment, by adopting the thermal management system 2 of the aforementioned embodiment, the consistency of the thermal management efficiency of the isolated cell array 32 and the thermal management efficiency of the grouped cell array can be improved. In this way, on the basis of ensuring the energy density of the battery 3 and each cell array is equipped with a thermal management component 11, the uniformity of the temperature management of the cell by the thermal management component 1 can be improved, so as to improve the consistency of the grouped cell array and the isolated cell array 32 in charging and discharging, battery 3 capacity attenuation, mechanical stress, etc. Ultimately, the reliability of the battery 3 can be improved.

[0112] In addition, the isolated cell row 32 and the first cell row 331 each include a plurality of cells arranged in sequence. The cells are cylindrical cells. The thermal management plate 16 is a serpentine plate and contacts the cylindrical surface of the cell, thereby increasing the contact surface area between the thermal management plate 16 and the cell, thereby improving the thermal management efficiency.

[0113] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A thermal management component, characterized in that: include: The heat management component has a main channel, and two ends of the main channel are respectively a first port and a second port; There are a plurality of thermal management components, and the plurality of thermal management components are sequentially spaced along a first direction, one of the plurality of thermal management components is a first thermal management component, and the rest are second thermal management components; The first port of each of the heat management components is communicated with the first port of the heat management component adjacent thereto, and the second port of each of the heat management components is communicated with the second port of the heat management component adjacent thereto; Among them, one side wall of the first thermal management component is configured to exchange heat with a heat source, and both side walls of the second thermal management component are configured to exchange heat with a heat source; the area of ​​at least part of the flow cross-section of the main channel of the first thermal management component is smaller than the area of ​​the flow cross-section of the main channel of the second thermal management component.

2. The thermal management assembly according to claim 1, characterized in that The portion of the main flow channel close to the first port and the portion close to the second port are both end flow channels; the flow cross section area of ​​the end flow channel of the first thermal management component is smaller than the flow cross section area of ​​the end flow channel of the second thermal management component.

3. The thermal management assembly according to claim 2, characterized in that The flow cross section area of ​​the end flow channel of the second heat management component is S1, and the flow cross section area of ​​the end flow channel of the first heat management component is S2, satisfying: 19% S1≤S2≤40% S1.

4. The thermal management assembly according to claim 3, characterized in that The cross section of the end flow channel is circular, the diameter of the end flow channel of the second heat management component is φA, and the diameter of the end flow channel of the first heat management component is φB, satisfying: 50% φA≤φB≤70% φA.

5. The thermal management assembly according to any one of claims 1 to 4, characterized in that: The heat management component comprises a current collector and a heat management plate, the current collector comprises a main body and a first nozzle and a second nozzle connected to the main body, the inner hole of the first nozzle and the inner hole of the second nozzle are both the end flow channel; the main body is provided with a first cavity and a second cavity; The heat management plate has a U-shaped exchange channel, one end of the heat management plate is connected to the current collector, and two ends of the exchange channel are respectively connected to the first cavity and the second cavity; The heat management components located at the two ends of the first direction are terminal heat management components, and the remaining heat management components are intermediate heat management components; In each of the intermediate thermal management components: two first nozzles are respectively located on both sides of the current collector, and the end flow channels of the first nozzles are both connected to the first cavity; two second nozzles are respectively located on both sides of the current collector, and the end flow channels of the second nozzles are both connected to the second cavity; In each of the terminal heat management components: the end flow channel of the first nozzle is connected to the first cavity, and the end flow channel of the second nozzle is connected to the second cavity; Among them, in each of the thermal management components, the first cavity, the second cavity, the end flow channel and the exchange flow channel jointly define the main flow channel, the end of the end flow channel of the first nozzle away from the first cavity is the first port, and the end of the end flow channel of the second nozzle away from the second cavity is the second port.

6. The thermal management assembly according to claim 5, characterized in that The thermal management component also includes a first main pipeline, and the current collector of the thermal management component is provided with a first connecting hole and a second connecting hole, the two sides of the first connecting hole are respectively connected to the first cavity and the second cavity, and the second connecting hole is connected to the second cavity; one end of the thermal management plate is plugged into the first connecting hole, and one end of the first main pipeline is plugged into the second connecting hole.

7. The thermal management assembly according to claim 6, characterized in that Along the first direction, the first connecting hole has a width dimension X, and the end of the inner hole of the first main pipe close to the second cavity has a width dimension Y, satisfying: X<Y≤10X.

8. The thermal management assembly according to claim 6 or 7, characterized in that: An end of the inner hole of the first main pipe away from the second cavity has a diameter φZ, which satisfies: Y+2mm≤φZ≤5Y.

9. The thermal management assembly according to claim 5, characterized in that The thermal management component also includes a second main pipe, one end of which is connected to the first cavity of the collector of the second thermal management component, the inner diameter of the second main pipe is φC, and the inner diameter of the first nozzle of the second thermal management component is φA, satisfying: φC>φA.

10. The thermal management assembly according to any one of claims 1 to 4, characterized in that: The thermal management assembly further comprises: A plurality of first bellows are staggeredly distributed with the plurality of heat management components, and two ends of each of the first bellows are respectively connected to the first port of the heat management component adjacent thereto; A plurality of second bellows are staggeredly distributed with the plurality of heat management components, and two ends of each second bellows are respectively communicated with the second port of the heat management component adjacent thereto.

11. The thermal management assembly according to any one of claims 1 to 4, characterized in that: A heat management component located at one end of the first direction is the first heat management component.

12. The thermal management assembly according to any one of claims 1 to 4, characterized in that: The first heat management component has a first side wall and a second side wall disposed opposite to the first side wall, and the first side wall is configured to exchange heat with the heat source; Wherein, the second side wall is provided with a heat insulation layer, and / or the wall thickness of the second side wall is greater than the wall thickness of the first side wall.

13. A thermal management system, characterized in that: include: The thermal management assembly according to any one of claims 1 to 12; a liquid inlet pipe, connected to one of the first port and the second port; a liquid outlet pipe, connected to the other of the first port and the second port; The temperature regulating module has two ports respectively connected with the liquid inlet pipe and the liquid outlet pipe, and the temperature regulating module is used to regulate the temperature of the heat exchange medium from the liquid outlet pipe and send the regulated heat exchange medium to the liquid inlet pipe.

14. A battery, characterized in that: include: A box body having a mounting cavity; The thermal management system according to claim 13, wherein the thermal management component, an end of the liquid inlet pipe close to the thermal management component, and an end of the liquid outlet pipe close to the thermal management component are all disposed in the installation cavity; A solitary battery cell array, located on one side of the first thermal management component and thermally coupled to the first thermal management component; A plurality of battery cell groups are arranged corresponding to the plurality of second thermal management components one by one; the battery cell group comprises two first battery cell columns, and the two first battery cell columns of each battery cell group are respectively located on both sides of the corresponding second thermal management components.

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