Battery with cooling structure, battery pack and electric vehicle

Abstract

The present application provides a battery with a cooling structure, the battery comprises a cooling plate assembly and a battery module, the cooling plate assembly comprises a horizontally arranged first cold plate and a plurality of vertically arranged second cold plates, the plurality of second cold plates are sequentially arranged at intervals along the horizontal direction, independent cooling liquid channels are respectively arranged in the first cold plate and the second cold plate; the first cold plate is at least located on one side of the second cold plate in the vertical direction, the battery module is located between the two adjacent second cold plates, and the two opposite side faces of the battery module are cooled through the two adjacent second cold plates respectively. The top surface and / or the bottom surface of the battery module are / is cooled through the first cold plate. The utility model further provides a battery pack and an electric vehicle.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery, battery pack and electric vehicle with a cooling structure. Background Technology

[0002] With the rapid development of new energy vehicles, the requirements for lithium batteries in terms of safety, environmental protection, and space utilization are becoming increasingly stringent. To meet the range requirements of electric vehicles, the energy density of individual battery cells used in electric vehicles is increasing, and the number of individual battery cells is also growing.

[0003] Due to the limited space within a car, the gaps between battery cells are reduced, resulting in less space for heat dissipation. To maintain the temperature of the power battery within a suitable range and ensure the safety and lifespan of the battery system, a more efficient liquid cooling system needs to be developed. Utility Model Content

[0004] The purpose of this application is to provide a battery with a cooling structure that not only has high cooling efficiency, but also allows the battery modules to be separated by a first cold plate to eliminate the thermal impact between adjacent battery modules, effectively control thermal runaway, and improve the safety performance of the battery pack.

[0005] This application provides a battery with a cooling structure, including a cooling plate assembly and a battery module. The cooling plate assembly includes a horizontally arranged first cold plate and a plurality of vertically arranged second cold plates. The plurality of second cold plates are arranged sequentially at intervals along the horizontal direction. Each of the first cold plate and the second cold plates has an independent coolant channel. The first cold plate is located at least on one side of the second cold plate along the vertical direction. The battery module is located between two adjacent second cold plates. The two opposite sides of the battery module are cooled by the two adjacent second cold plates, and the top surface and / or bottom surface of the battery module are cooled by the first cold plate.

[0006] In one possible implementation, the first cold plate is located below the second cold plate, the bottom end of the second cold plate is in contact with the top surface of the first cold plate, and the bottom surface of the battery module is in contact with the top surface of the first cold plate.

[0007] In one possible implementation, the first cold plate is provided with a coolant inlet and a coolant outlet, and the second cold plate is connected to the first cold plate through a coolant pipeline; external coolant can enter the first cold plate through the coolant inlet, and then flow through the coolant channel in the first cold plate, the coolant pipeline and the coolant channel in the second cold plate respectively before flowing out from the coolant outlet.

[0008] In one possible implementation, the coolant pipeline has a weak section, the wall thickness of which is less than the wall thickness at other locations on the coolant pipeline; when the weak section is heated and melts, external coolant can be sprayed out from the weak section to cool the battery module.

[0009] In one possible implementation, the coolant piping includes an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to the first cold plate near the coolant inlet, and the other end of the inlet pipe is simultaneously connected to the inlets of multiple second cold plates. One end of the outlet pipe is connected to the first cold plate near the coolant outlet, and the other end of the outlet pipe is simultaneously connected to the outlets of multiple second cold plates.

[0010] In one possible implementation, the liquid inlet and liquid outlet of the second cold plate are respectively disposed at opposite ends of the second cold plate, and the liquid inlet pipe and the liquid outlet pipe are respectively disposed at opposite ends of the second cold plate.

[0011] In one possible implementation, a receiving cavity is formed between each two adjacent second cold plates, the first cold plate, the liquid inlet pipe, and the liquid outlet pipe, and the battery module is disposed within the receiving cavity.

[0012] In one possible implementation, the liquid inlet pipe includes a plurality of liquid inlet branches connected in sequence, each liquid inlet branch corresponding to one of the battery modules, and both ends of each liquid inlet branch are respectively connected to the liquid inlets of two adjacent second cold plates.

[0013] And / or, the liquid outlet pipe includes a plurality of liquid outlet branches connected in sequence, each of the liquid outlet branches corresponding to one of the battery modules, and the two ends of each of the liquid outlet branches are respectively connected to the liquid outlets of two adjacent second cold plates.

[0014] In one possible implementation, the end of the inlet branch pipe and / or the end of the outlet branch pipe are provided with quick-connect plugs, the quick-connect plugs on the inlet branch pipe are fixed to the inlet of the second cold plate by plugging, and the quick-connect plugs on the outlet branch pipe are fixed to the outlet of the second cold plate by plugging.

[0015] In one possible implementation, the inlet branch pipe and / or the outlet branch pipe are provided with a weak section, wherein the wall thickness of the weak section on the inlet branch pipe is less than the wall thickness at other locations on the inlet branch pipe, and the wall thickness of the weak section on the outlet branch pipe is less than the wall thickness at other locations on the outlet branch pipe.

[0016] In one feasible embodiment, the wall thickness of the weak section of the inlet branch pipe is 1 / 3 to 2 / 3 of the wall thickness of other parts of the inlet branch pipe; and / or, the wall thickness of the weak section of the outlet branch pipe is 1 / 3 to 2 / 3 of the wall thickness of other parts of the outlet branch pipe.

[0017] In one possible implementation, the weak section on the inlet branch pipe is located at the middle of the inlet branch pipe; and / or, the weak section on the outlet branch pipe is located at the middle of the outlet branch pipe.

[0018] In one possible implementation, the inlet pipe further includes an inlet connecting pipe, one end of which is connected to the first cold plate near the coolant inlet, and the other end of which is connected to the inlet branch pipe.

[0019] And / or, the outlet pipe further includes an outlet connecting pipe, one end of which is connected to the first cold plate near the coolant outlet, and the other end of which is connected to the outlet branch pipe.

[0020] In one possible implementation, a first thermally conductive adhesive is provided between the surface of the first cold plate and the top and / or bottom surface of the battery module, the first thermally conductive adhesive being disposed on the surface of the first cold plate and / or the top and / or bottom surface of the battery module.

[0021] And / or, a second thermally conductive adhesive is provided between the surface of the second cold plate and the side of the battery module, the second thermally conductive adhesive being disposed on the surface of the second cold plate and / or the side of the battery module.

[0022] In one feasible approach, among the multiple spaced-apart second cold plates, the second thermally conductive adhesive disposed between the surfaces of the two outermost second cold plates and the side of the battery module is a thermally conductive structural adhesive.

[0023] In one possible implementation, the number of the second cold plates is at least three, and the at least three second cold plates are arranged sequentially at intervals along the horizontal direction; a battery module is provided between each two adjacent second cold plates, and each two adjacent battery modules are separated by the second cold plates.

[0024] This application also provides a battery pack, including the battery with a cooling structure as described above.

[0025] In one possible implementation, the battery pack further includes a battery housing, the battery housing including a side panel connected to the first cold plate, the first cold plate serving as the top or bottom plate of the battery housing.

[0026] In one possible implementation, the first cold plate serves as the bottom plate of the battery housing, the first cold plate is located below the side plate, and the bottom of the side plate is connected to the first cold plate.

[0027] This application also provides an electric vehicle including the battery pack described above.

[0028] The battery with a cooling structure provided in this application, by setting a first cold plate and multiple second cold plates, with the battery module located between two adjacent second cold plates, the two opposite sides of the battery module are cooled by the two second cold plates adjacent to it, and the top and / or bottom surface of the battery module is cooled by the first cold plate, thereby forming a structure with at least three-sided cooling of the battery module, resulting in higher cooling efficiency and better cooling effect; moreover, the battery modules can be separated by the first cold plate to eliminate the thermal influence between adjacent battery modules, which can effectively control thermal runaway and improve the safety performance of the battery pack. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the battery pack structure in an embodiment of this application.

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the intermediate cooling plate assembly.

[0031] Figure 3 This is a schematic diagram of the coolant flow direction in an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the inlet branch pipe and outlet branch pipe in the embodiments of this application.

[0033] Figure 5 for Figure 4 Schematic diagram of the cross-section of the weak section on the inlet and outlet branches.

[0034] In the diagram, 1-cooling plate assembly, 10-accommodating cavity, 11-first cold plate, 111-coolant inlet, 112-coolant outlet, 12-second cold plate, 2-battery module, 3-coolant pipeline, 30-weak section, 31-inlet pipe, 311-inlet branch pipe, 312-inlet connecting pipe, 32-outlet pipe, 321-outlet branch pipe, 322-outlet connecting pipe, 33-quick connector, 4-side plate. Detailed Implementation

[0035] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0036] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0037] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this application are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of such directional terms should not limit the scope of protection claimed in this application.

[0038] like Figures 1 to 3 As shown in the embodiment of this application, the battery with a cooling structure includes a cooling plate assembly 1 and a battery module 2. The cooling plate assembly 1 includes a horizontally arranged first cold plate 11 and a plurality of vertically arranged second cold plates 12. The plurality of second cold plates 12 are arranged sequentially at intervals along the horizontal direction X. Each of the first cold plate 11 and the second cold plate 12 is provided with an independent coolant channel. The first cold plate 11 is located at least on one side of the second cold plate 12 along the vertical direction Y. The battery module 2 is located between two adjacent second cold plates 12. The two opposite sides of the battery module 2 are cooled by the two second cold plates 12 adjacent to them, and the top surface and / or bottom surface of the battery module 2 are cooled by the first cold plate 11.

[0039] like Figure 1 and Figure 2 As shown, in one embodiment, the number of second cold plates 12 is at least three, and the at least three second cold plates 12 are arranged sequentially at intervals along the horizontal direction X; a battery module 2 is provided between each two adjacent second cold plates 12, and each two adjacent battery modules 2 are separated by the second cold plates 12.

[0040] Specifically, the battery with a cooling structure provided in this application embodiment, by setting a first cold plate 11 and a plurality of second cold plates 12, the battery module 2 is located between two adjacent second cold plates 12, the two opposite sides of the battery module 2 are cooled by the two adjacent second cold plates 12 respectively, and the top surface and / or bottom surface of the battery module 2 is cooled by the first cold plate 11, thereby forming a structure of at least three-sided cooling for the battery module 2, which has higher cooling efficiency and better cooling effect; moreover, the battery modules 2 can be separated by the first cold plate 11 to eliminate the thermal influence between adjacent battery modules 2, which can effectively control thermal runaway and improve the safety performance of the battery pack.

[0041] like Figure 1 and Figure 2As shown, in one embodiment, the first cold plate 11 is located below the second cold plate 12, with the bottom end of the second cold plate 12 contacting the top surface of the first cold plate 11, and the bottom surface of the battery module 2 contacting the top surface of the first cold plate 11. Of course, in other embodiments, the first cold plate 11 can also be positioned above the second cold plate 12, in which case the top end of the second cold plate 12 contacts the bottom surface of the first cold plate 11, and the top surface of the battery module 2 contacts the bottom surface of the first cold plate 11. Alternatively, the first cold plate 11 can be positioned both above and below the second cold plate 12, thus forming a four-sided cooling structure for the battery module 2.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment, both the first cold plate 11 and the second cold plate 12 are square structures, and a plurality of second cold plates 12 are arranged in sequence at intervals along the length direction of the first cold plate 11 (that is, the horizontal direction X in the figure is the length direction of the first cold plate 11).

[0043] like Figure 1 and Figure 2 As shown, in one embodiment, the first cold plate 11 is provided with a coolant inlet 111 and a coolant outlet 112, which are located on the same side along the length of the first cold plate 11. The second cold plate 12 is connected to the first cold plate 11 via a coolant pipe 3. External coolant can enter the first cold plate 11 through the coolant inlet 111, and then flow through the coolant channels in the first cold plate 11, the coolant pipe 3, and the coolant channels in the second cold plate 12 before exiting through the coolant outlet 112.

[0044] like Figure 2 As shown, in one embodiment, the coolant pipeline 3 includes an inlet pipe 31 and an outlet pipe 32. One end of the inlet pipe 31 is connected to the first cold plate 11 near the coolant inlet 111, and the other end of the inlet pipe 31 is simultaneously connected to the inlets of multiple second cold plates 12. One end of the outlet pipe 32 is connected to the first cold plate 11 near the coolant outlet 112, and the other end of the outlet pipe 32 is simultaneously connected to the outlets of multiple second cold plates 12.

[0045] like Figure 2 As shown, in one embodiment, the liquid inlet and liquid outlet of the second cold plate 12 are respectively disposed at opposite ends of the second cold plate 12, and the liquid inlet pipe 31 and liquid outlet pipe 32 are respectively disposed at opposite ends of the second cold plate 12.

[0046] like Figure 1 and Figure 2 As shown, in one embodiment, each pair of adjacent second cold plates 12, first cold plates 11, liquid inlet pipe 31 and liquid outlet pipe 32 enclose a cavity 10, and the battery module 2 is disposed in the cavity 10.

[0047] Specifically, by placing the inlet pipe 31 and the outlet pipe 32 on opposite sides of the second cold plate 12, the center of gravity of the entire battery with the cooling structure is kept at its center, preventing the module's center of gravity from shifting. Furthermore, the coolant enters the second cold plate 12 from one side of the battery module 2 and flows out from the other side, achieving excellent cooling and heat dissipation. Simultaneously, the cavity 10 formed by the second cold plate 12, the first cold plate 11, the inlet pipe 31, and the outlet pipe 32 ensures that the battery module 2 remains in place, preventing relative sliding between the battery module 2 and the cold plate.

[0048] like Figure 2 As shown, in one embodiment, the liquid inlet pipe 31 includes a plurality of liquid inlet branch pipes 311 connected in sequence. The liquid inlet branch pipes 311 extend in the horizontal direction X. Each liquid inlet branch pipe 311 corresponds to a battery module 2 (that is, each liquid inlet branch pipe 311 is located between two adjacent second cold plates 12). The two ends of each liquid inlet branch pipe 311 are respectively connected to the liquid inlet of two adjacent second cold plates 12, thereby forming a three-way structure at the connection position between the liquid inlet branch pipe 311 and the second cold plate 12 (that is, the liquid inlet of the second cold plate 12 is simultaneously connected to the coolant channel in the second cold plate 12 and the two liquid inlet branch pipes 311 on both sides thereon).

[0049] The liquid outlet pipe 32 includes a plurality of liquid outlet branch pipes 321 connected in sequence. The liquid outlet branch pipes 321 extend in the horizontal direction X. Each liquid outlet branch pipe 321 corresponds to a battery module 2 (that is, each liquid outlet branch pipe 321 is located between two adjacent second cold plates 12). Both ends of each liquid outlet branch pipe 321 are connected to the liquid outlet of two adjacent second cold plates 12, thereby forming a three-way structure at the connection position between the liquid outlet branch pipe 321 and the second cold plate 12 (that is, the liquid outlet of the second cold plate 12 is simultaneously connected to the coolant channel in the second cold plate 12 and the two liquid outlet branch pipes 321 on both sides thereon).

[0050] like Figure 2 As shown, in one embodiment, both ends of the inlet branch pipe 311 and the outlet branch pipe 321 are provided with quick-connect plugs 33. The quick-connect plugs 33 on the inlet branch pipe 311 are fixed to the inlet of the second cold plate 12 by plugging, and the quick-connect plugs 33 on the outlet branch pipe 321 are fixed to the outlet of the second cold plate 12 by plugging, thereby facilitating the maintenance, replacement and installation of the inlet branch pipe 311 and the outlet branch pipe 321.

[0051] like Figure 2 , Figure 4 and Figure 5As shown, in one embodiment, the coolant pipe 3 can be a corrugated pipe, a flexible hose, etc., and the coolant pipe 3 has a weak section 30. The wall thickness of the weak section 30 is less than the wall thickness of other parts of the coolant pipe 3. When the weak section 30 is heated and melted, external coolant can be sprayed out from the weak section 30 of the coolant pipe 3 to cool the battery module 2.

[0052] Specifically, by setting a weak section 30 on the coolant pipe 3, that is, forming a burst structure on the coolant pipe 3, when the battery module 2 experiences thermal runaway, when the temperature of the coolant pipe 3 reaches its melting point (for example, the coolant pipe 3 is made of PA12 (polydodecanoic acid), whose melting point is 172-178℃), the weak section 30 on the coolant pipe 3 melts and breaks first due to its thinner pipe wall. This allows the coolant in the coolant pipe 3 to spray out from the weak section 30 to cool the battery module 2, and the coolant can quickly submerge the battery module 2, thereby effectively controlling thermal runaway and improving the safety performance of the battery pack.

[0053] like Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment, both the inlet branch pipe 311 and the outlet branch pipe 321 are provided with at least one weak section 30. The wall thickness of the weak section 30 on the inlet branch pipe 311 is less than the wall thickness at other locations on the inlet branch pipe 311, and the wall thickness of the weak section 30 on the outlet branch pipe 321 is less than the wall thickness at other locations on the outlet branch pipe 321. By setting the weak section 30 on the inlet branch pipe 311 and the outlet branch pipe 321, when a battery module 2 experiences thermal runaway, the weak section 30 on the corresponding inlet branch pipe 311 and outlet branch pipe 321 will melt and break first, thereby enabling the spraying of coolant onto the battery module 2 that has experienced thermal runaway, thus improving cooling efficiency.

[0054] like Figure 4 and Figure 5 As shown, in one embodiment, the wall thickness of the weak section 30 on the inlet branch pipe 311 is 1 / 5 to 2 / 5, or 1 / 3 to 2 / 3, or 1 / 2 of the wall thickness at other locations on the inlet branch pipe 311. The wall thickness of the weak section 30 on the outlet branch pipe 321 is 1 / 5 to 2 / 5, or 1 / 3 to 2 / 3, or 1 / 2 of the wall thickness at other locations on the outlet branch pipe 321.

[0055] like Figure 4 and Figure 5 As shown, in one embodiment, the weak section 30 on the liquid inlet branch pipe 311 is located in the middle of the liquid inlet branch pipe 311, and the weak section 30 on the liquid outlet branch pipe 321 is located in the middle of the liquid outlet branch pipe 321, thereby ensuring that the cooling area of ​​the battery module 2 is larger when the weak section 30 is broken, so as to improve the cooling effect.

[0056] like Figure 2 As shown, in one embodiment, the liquid inlet pipe 31 also includes a liquid inlet connecting pipe 312. The liquid inlet connecting pipe 312 is arranged vertically. One end of the liquid inlet connecting pipe 312 is connected to the position of the first cold plate 11 near the coolant inlet 111, and the other end of the liquid inlet connecting pipe 312 is connected to the liquid inlet branch pipe 311.

[0057] The liquid outlet pipe 32 also includes a liquid outlet connecting pipe 322, which is vertically arranged. One end of the liquid outlet connecting pipe 322 is connected to the position of the first cold plate 11 near the coolant outlet 112, and the other end of the liquid outlet connecting pipe 322 is connected to the liquid outlet branch pipe 321.

[0058] In one implementation, the first cold plate 11 and the second cold plate 12 are connected to the battery module 2 via thermally conductive adhesive to achieve mechanical connection with the battery module 2 and heat dissipation for the battery module 2 (of course, in other embodiments, the first cold plate 11 and the second cold plate 12 can also directly contact the battery module 2 for heat dissipation). Specifically, a first thermally conductive adhesive (not shown) is provided between the surface of the first cold plate 11 and the top and / or bottom surface of the battery module 2. The first thermally conductive adhesive is disposed on the surface of the first cold plate 11 and / or the top and / or bottom surface of the battery module 2.

[0059] A second thermally conductive adhesive (not shown) is provided between the surface of the second cold plate 12 and the side of the battery module 2. The second thermally conductive adhesive is provided on the surface of the second cold plate 12 and / or the side of the battery module 2.

[0060] like Figure 1 and Figure 2 As shown, in one embodiment, among the multiple spaced second cold plates 12, the second thermally conductive adhesive disposed between the surfaces of the two outermost second cold plates 12 and the side of the battery module 2 is a thermally conductive structural adhesive.

[0061] Specifically, since the first and last two second cold plates 12 are connected to the battery module 2 on only one side, they need to be connected using thermally conductive structural adhesive. This adhesive provides a strong and secure connection, preventing the first and last two second cold plates 12 from detaching from the battery module 2 during vehicle operation. The remaining second cold plates 12 located in the middle position can be connected to the battery module 2 using ordinary thermally conductive adhesive (the middle second cold plate 12 is connected to the battery module 2 on two sides and sandwiched between the battery modules, making it less prone to detachment), facilitating the disassembly of the battery module 2. The first thermally conductive adhesive could be, for example, FP-800K30 LD. The second thermally conductive adhesive located between the surfaces of the two outermost second cold plates 12 and the sides of the battery module 2 could be, for example, TSA-3000 K20. The second thermally conductive adhesive located between the surface of the middle second cold plate 12 and the sides of the battery module 2 could also be, for example, FP-800 K30 LD.

[0062] like Figure 1 and Figure 3 As shown, in this embodiment, the coolant flows as follows: the coolant flows into the first cold plate 11 from the coolant inlet 111, and then splits into two paths. One path flows through the coolant channel within the first cold plate 11 and then flows out from the coolant outlet 112. Figure 3 In the diagram, the flow direction of the coolant within the first cold plate 11 is indicated by a solid arrow, to cool the bottom surface of the battery module 2; another path flows sequentially through the inlet pipe 31, the coolant channels within each of the second cold plates 12, and the outlet pipe 32 before exiting from the coolant outlet 112. Figure 3 In the diagram, the flow direction of the coolant in the inlet pipe 31, the second cold plate 12, and the outlet pipe 32 is indicated by dashed arrows, to cool the sides of the battery module 2. When thermal runaway occurs in the battery module 2, the flow rate of the coolant in the cold plate increases to rapidly cool the battery module 2. When the temperature is too high, the weak section 30 on the coolant pipe 3 automatically melts and breaks open, and the coolant sprays out from the weak section 30 to cool the battery module 2, thereby reducing the risk of thermal runaway propagation and improving the safety performance of the battery pack.

[0063] like Figure 1 As shown in the figure, this application embodiment also provides a battery pack, including the battery with a cooling structure described above.

[0064] like Figure 1 As shown, in one embodiment, the battery pack also includes a battery housing, which includes a side plate 4 connected to a first cold plate 11, which serves as the top and / or bottom plate of the battery housing.

[0065] like Figure 1As shown, in one embodiment, the first cold plate 11 serves as the bottom plate of the battery box, and is located below the side plate 4. The bottom of the side plate 4 is connected to the first cold plate 11. Of course, in other embodiments, the first cold plate 11 can also serve as the top plate of the battery box, or there can be two first cold plates 11, which serve as the top plate and bottom plate of the battery box, respectively.

[0066] In one implementation, the side plate 4 is connected to the first cold plate 11 by bolts, and the battery module 2 is fixed to the battery box by bolts.

[0067] This application also provides an electric vehicle, including the battery pack described above.

[0068] The battery with a cooling structure provided in this application embodiment, by setting a first cold plate 11 and a plurality of second cold plates 12, with the battery module 2 located between two adjacent second cold plates 12, the opposite two sides of the battery module 2 are cooled by the two second cold plates 12 adjacent to it, and the top surface and / or bottom surface of the battery module 2 are cooled by the first cold plate 11, thereby forming a structure of at least three-sided cooling for the battery module 2, resulting in higher cooling efficiency and better cooling effect; moreover, the battery modules 2 can be separated by the first cold plate 11 to eliminate the thermal influence between adjacent battery modules 2, which can effectively control thermal runaway and improve the safety performance of the battery pack.

[0069] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery having a cooling structure, characterized by, The application relates to a cooling plate assembly (1) and a battery module (2), wherein the cooling plate assembly (1) comprises a horizontally arranged first cooling plate (11) and a plurality of vertically arranged second cooling plates (12), the plurality of second cooling plates (12) are arranged in sequence and at intervals along a horizontal direction (X), and independent cooling liquid channels are arranged in the first cooling plate (11) and the second cooling plates (12) respectively; the first cooling plate (11) is arranged on one side of the second cooling plates (12) along a vertical direction (Y), and the battery module (2) is arranged between two adjacent second cooling plates (12); opposite sides of the battery module (2) are cooled by two adjacent second cooling plates (12) respectively, and the top surface and / or the bottom surface of the battery module (2) are cooled by the first cooling plate (11). The first cooling plate (11) is provided with a cooling liquid inlet (111) and a cooling liquid outlet (112), the second cooling plate (12) is communicated with the first cooling plate (11) through a cooling liquid pipeline (3); external cooling liquid can enter the first cooling plate (11) through the cooling liquid inlet (111), and then flow through the cooling liquid channels in the first cooling plate (11), the cooling liquid pipeline (3) and the cooling liquid channels in the second cooling plate (12) and flow out from the cooling liquid outlet (112). The cooling liquid pipeline (3) comprises an inlet pipe (31) and an outlet pipe (32), one end of the inlet pipe (31) is communicated with the first cooling plate (11) near the cooling liquid inlet (111), and the other end of the inlet pipe (31) is communicated with the inlet ports of the plurality of second cooling plates (12) simultaneously; one end of the outlet pipe (32) is communicated with the first cooling plate (11) near the cooling liquid outlet (112), and the other end of the outlet pipe (32) is communicated with the outlet ports of the plurality of second cooling plates (12) simultaneously.

2. The battery having a cooling structure according to claim 1, wherein The first cooling plate (11) is arranged below the second cooling plate (12), the bottom end of the second cooling plate (12) is in contact with the top surface of the first cooling plate (11), and the bottom surface of the battery module (2) is in contact with the top surface of the first cooling plate (11).

3. The battery having a cooling structure according to claim 1, wherein A weak section (30) is arranged on the cooling liquid pipeline (3), the thickness of the pipe wall of the weak section (30) is smaller than that of other positions of the cooling liquid pipeline (3); when the weak section (30) is heated and melted, external cooling liquid can be sprayed out from the weak section (30) of the cooling liquid pipeline (3) to cool the battery module (2).

4. The battery having a cooling structure according to claim 1, wherein The inlet port and the outlet port of the second cooling plate (12) are arranged at opposite ends of the second cooling plate (12) respectively, and the inlet pipe (31) and the outlet pipe (32) are arranged at the opposite ends of the second cooling plate (12) respectively.

5. The battery having a cooling structure according to claim 4, wherein Each of the second cold plates (12), the first cold plate (11), the liquid inlet pipe (31) and the liquid outlet pipe (32) forms a containing cavity (10) between every two adjacent second cold plates (12), and the battery module (2) is arranged in the containing cavity (10).

6. The battery having a cooling structure according to claim 1, wherein The liquid inlet pipe (31) comprises a plurality of liquid inlet branch pipes (311) connected in sequence, each of the liquid inlet branch pipes (311) corresponds to one of the battery modules (2), and two ends of each of the liquid inlet branch pipes (311) are in communication with the liquid inlet ports of two adjacent second cold plates (12) respectively. And / or, the liquid outlet pipe (32) comprises a plurality of liquid outlet branch pipes (321) connected in sequence, each of the liquid outlet branch pipes (321) corresponds to one of the battery modules (2), and two ends of each of the liquid outlet branch pipes (321) are in communication with the liquid outlet ports of two adjacent second cold plates (12) respectively.

7. The battery having a cooling structure according to claim 6, wherein The end of the liquid inlet branch pipe (311) and / or the end of the liquid outlet branch pipe (321) is provided with a quick plug (33), the quick plug (33) on the liquid inlet branch pipe (311) is fixed with the liquid inlet port of the second cold plate (12) through plug connection, and the quick plug (33) on the liquid outlet branch pipe (321) is fixed with the liquid outlet port of the second cold plate (12) through plug connection.

8. The battery having a cooling structure according to claim 6, wherein The liquid inlet branch pipe (311) and / or the liquid outlet branch pipe (321) is provided with a weak section (30), the thickness of the pipe wall of the weak section (30) on the liquid inlet branch pipe (311) is less than the thickness of the pipe wall of other positions of the liquid inlet branch pipe (311), and the thickness of the pipe wall of the weak section (30) on the liquid outlet branch pipe (321) is less than the thickness of the pipe wall of other positions of the liquid outlet branch pipe (321).

9. The battery having a cooling structure according to claim 8, wherein The thickness of the pipe wall of the weak section (30) on the liquid inlet branch pipe (311) is 1 / 3-2 / 3 of the thickness of the pipe wall of other positions of the liquid inlet branch pipe (311), and / or the thickness of the pipe wall of the weak section (30) on the liquid outlet branch pipe (321) is 1 / 3-2 / 3 of the thickness of the pipe wall of other positions of the liquid outlet branch pipe (321).

10. The battery having a cooling structure according to claim 8, wherein The weak section (30) on the liquid inlet branch pipe (311) is arranged at a middle position of the liquid inlet branch pipe (311), and / or the weak section (30) on the liquid outlet branch pipe (321) is arranged at a middle position of the liquid outlet branch pipe (321).

11. The battery having a cooling structure according to claim 6, wherein The liquid inlet pipe (31) further comprises a liquid inlet connecting pipe (312), one end of the liquid inlet connecting pipe (312) is in communication with the first cold plate (11) close to the position of the cooling liquid inlet (111), and the other end of the liquid inlet connecting pipe (312) is in communication with the liquid inlet branch pipe (311). And / or, the liquid outlet pipe (32) further comprises a liquid outlet connecting pipe (322), one end of the liquid outlet connecting pipe (322) is in communication with the first cold plate (11) close to the position of the cooling liquid outlet (112), and the other end of the liquid outlet connecting pipe (322) is in communication with the liquid outlet branch pipe (321).

12. The battery having a cooling structure according to claim 1, wherein A first heat-conducting adhesive is arranged between the surface of the first cold plate (11) and the top surface and / or the bottom surface of the battery module (2). And / or, a second heat-conducting adhesive is arranged between the surface of the second cold plate (12) and the side surface of the battery module (2).

13. The battery having a cooling structure according to claim 12, wherein Among the plurality of second cold plates (12) arranged at intervals, the second heat-conducting adhesive arranged between the surface of the two second cold plates (12) arranged at the outermost sides and the side surface of the battery module (2) is a heat-conducting structural adhesive.

14. The battery having a cooling structure according to any one of claims 1 to 13, wherein The number of the second cold plates (12) is at least three, and the at least three second cold plates (12) are arranged at intervals along the horizontal direction (X) in sequence; the battery module (2) is arranged between each two adjacent second cold plates (12), and the second cold plate (12) is arranged between each two adjacent battery modules (2).

15. A battery pack, characterized by The battery with the cooling structure according to any one of claims 1-14.

16. The battery pack of claim 15, wherein, The battery pack further comprises a battery box body, and the battery box body comprises a side plate (4) connected with the first cold plate (11), and the first cold plate (11) serves as a top plate and / or a bottom plate of the battery box body.

17. The battery pack of claim 16, wherein, The first cold plate (11) serves as the bottom plate of the battery box body, the first cold plate (11) is located below the side plate (4), and the bottom of the side plate (4) is connected with the first cold plate (11).

18. An electric vehicle, characterized in that The battery pack according to any one of claims 15-17.

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