Cooling device and battery pack

Abstract

The application discloses a cooling device and a battery pack. The cooling device cools the cooling liquid flowing back to the cooling cavity through the cooling medium in the cooling cavity, that is, the cooling device itself is provided with a cold source applied to cooling of the cooling liquid, and the high-temperature cooling liquid after heat dissipation of the battery module in the cooling device does not need to be cooled by a system outside the cooling device, so that the cooling device can be simplified, and the heat dissipation cost of the battery module is reduced. Moreover, the first flow path structure and the second flow path structure are arranged between the heat dissipation cavity and the cooling cavity to form a complete cooling liquid circulation loop, the high-temperature cooling liquid after heat dissipation of the battery module is cooled by the cooling medium and then is applied to heat dissipation of the battery module again, instead of being directly discharged to the external environment, so that the influence of the cooling device on the external environment can be reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a cooling device and a battery pack. Background Technology

[0002] Electric vehicles are vehicles powered by onboard electricity. Compared to traditional vehicles, electric vehicles have a smaller impact on the environment, and therefore their prospects are widely regarded as promising.

[0003] The battery, which serves as the onboard power source in an electric vehicle, generates a significant amount of heat during daily use, necessitating a corresponding cooling system to dissipate this heat. However, current cooling systems for battery cooling (such as cryogenic gases) rely on external systems for cooling the cooling medium before it can be applied to the battery. This results in complex cooling systems and high costs for battery cooling. Furthermore, current cooling systems lack a complete internal circuit design; the high-temperature cooling medium after cooling the battery is typically directly released into the external environment, potentially causing environmental impact. Summary of the Invention

[0004] This application provides a cooling device and a battery pack that can simplify the cooling device and reduce its impact on the external environment.

[0005] This application provides a cooling device. The cooling device includes a support base, within which are disposed a heat dissipation cavity, a cooling cavity, a first flow path structure, and a second flow path structure. The cooling cavity and the heat dissipation cavity are fluidly connected through the first flow path structure and the second flow path structure, respectively. The cooling cavity is used to store coolant and a cooling medium, and the cooling medium is used to cool the coolant in the cooling cavity. The support base also includes a top plate adjacent to the heat dissipation cavity, which is used to support the battery module. A pump body is disposed in the heat dissipation cavity and / or the cooling cavity. The coolant in the cooling cavity is transported to the heat dissipation cavity through the first flow path structure under the action of the pump body. The coolant in the heat dissipation cavity exchanges heat through the top plate to dissipate heat from the battery module. The coolant in the heat dissipation cavity also flows back to the cooling cavity through the second flow path structure, and the coolant circulates between the heat dissipation cavity and the cooling cavity.

[0006] In one embodiment of this application, the first flow path structure includes: a buffer cavity disposed within a support base and in fluid communication with a heat dissipation cavity and a cooling cavity, wherein the coolant from the cooling cavity is mixed with the coolant in the buffer cavity and then transported to the heat dissipation cavity.

[0007] In one embodiment of this application, the volume of the buffer cavity is greater than or equal to the volume of the cooling cavity.

[0008] In one embodiment of this application, the cooling device further includes: a stirring member rotatably disposed in a buffer chamber for mixing the coolant from the cooling chamber with the coolant in the buffer chamber; and a stirring drive member fixedly connected to the support base and drivenly connected to the stirring member for driving the stirring member to rotate.

[0009] In one embodiment of this application, the pump body includes: a first pump body disposed in a buffer cavity; the first flow path structure further includes: a first delivery pipe, one end of the first delivery pipe is connected to the first pump body, and the other end is connected to the heat dissipation cavity, the first pump body is used to deliver the mixed coolant to the heat dissipation cavity through the first delivery pipe.

[0010] In one embodiment of this application, the heat dissipation cavity and the cooling cavity are located on the same side of the buffer cavity, and the cooling cavity is located on the side of the heat dissipation cavity away from the top plate.

[0011] In one embodiment of this application, the buffer cavity is adjacent to the top plate, so that the coolant in the buffer cavity can dissipate heat from the battery module through the top plate.

[0012] In one embodiment of this application, the pump body includes: a second pump body disposed in a cooling chamber; the first flow path structure further includes: a second delivery pipe, one end of the second delivery pipe being connected to the second pump body and the other end being connected to a buffer chamber, the second pump body being used to deliver the coolant cooled by the cooling medium to the buffer chamber through the second delivery pipe.

[0013] In one embodiment of this application, the cooling device further includes: a heat dissipation pipe disposed in a heat dissipation cavity and connected to a first delivery pipe; wherein the heat dissipation pipe includes a plurality of nozzles, and the coolant in the heat dissipation pipe is sprayed out through the nozzles to the top plate to dissipate heat from the battery module.

[0014] In one embodiment of this application, the support base further includes: a partition, disposed between the heat dissipation cavity and the cooling cavity to separate the two; the second flow path structure includes: a return port, opened in the partition, through which the coolant sprayed from the nozzle flows back to the cooling cavity.

[0015] In one embodiment of this application, the second flow path structure includes: a connecting pipe disposed outside the support base, one end of which is connected to the heat dissipation pipe and the other end of which is connected to the cooling cavity, wherein the coolant in the heat dissipation pipe flows back to the cooling cavity through the connecting pipe.

[0016] Accordingly, this application also provides a battery pack, including a battery module and a cooling device as described in the above embodiments, wherein the battery module is disposed on the cooling device, and the cooling device exchanges heat with the battery module.

[0017] In one embodiment of this application, the battery pack includes a first direction, and the battery module is disposed on the cooling device along the first direction; the battery pack further includes: a first mounting mechanism connected to one of the battery module and the cooling device; a second mounting mechanism connected to the other of the battery module and the cooling device, and the first mounting mechanism and the second mounting mechanism are disposed opposite to each other along the first direction; and a lifting mechanism, which is drively connected to the first mounting mechanism and / or the second mounting mechanism, the lifting mechanism being used to drive the first mounting mechanism and the second mounting mechanism to move closer to each other, the first mounting mechanism and the second mounting mechanism being connected and fixed to fix the battery module to the cooling device.

[0018] The beneficial effects of this application are as follows: Unlike existing technologies, this application provides a cooling device and a battery pack. The support base of the cooling device is used to support the battery module. The support base also includes a heat dissipation cavity and a cooling cavity, which are fluidly connected through a first flow path structure and a second flow path structure, respectively. Coolant in the cooling cavity is transported to the heat dissipation cavity through the first flow path structure to dissipate heat from the battery module, and coolant in the heat dissipation cavity also flows back to the cooling cavity through the second flow path structure. The cooling medium in the cooling cavity is used to cool the coolant flowing back to the cooling cavity, enabling the cooling cavity to provide low-temperature coolant to the heat dissipation cavity to dissipate heat from the battery module.

[0019] This application's cooling device cools the coolant returning to the cooling chamber using a cooling medium within the cooling chamber. In other words, the cooling device itself is equipped with a cold source for cooling the coolant. The high-temperature coolant after dissipating heat from the battery module does not require external cooling systems, thus simplifying the cooling device and reducing the heat dissipation cost of the battery module. Furthermore, the heat dissipation chamber and cooling chamber form a complete coolant circulation loop through a first flow path structure and a second flow path structure. The high-temperature coolant after dissipating heat from the battery module is cooled by the cooling medium and then reused to dissipate heat from the battery module, rather than being directly discharged into the external environment, thus reducing the cooling device's impact on the external environment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the battery pack of this application;

[0022] Figure 2 This is a structural schematic diagram of an embodiment of the first installation mechanism of this application;

[0023] Figure 3 This is a schematic diagram of the structure of an embodiment of the second installation mechanism and lifting mechanism of this application;

[0024] Figure 4 This is a schematic diagram of an embodiment in which the first and second installation mechanisms of this application are connected.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10 Battery pack; 20 Cooling device; 21 Support base; 211 Top plate; 212 Heat dissipation cavity; 213 Cooling cavity; 214 Buffer cavity; 215 Divider; 2151 Return port; 216 Slide groove; 22a First flow path structure; 22b Second flow path structure; 221 First pump body; 222 First conveying pipe; 223 Second pump body; 224 Second conveying pipe; 231 Stirring component; 232 Stirring drive component; 24 Heat dissipation pipe; 241 Nozzle; 25 Connecting pipe; 30 Battery module; 40 First mounting mechanism; 41 First mechanism body; 411 Clamping cavity; 4111 First opening; 4112 Second opening; 412 Rotating roller cavity; 42 Clamping block; 42a First clamping block; 42b Second clamping block; 421 Clamping part; 422 Limiting part; 43 Drive assembly; 431 Telescopic drive component; 432 Rotary roller; 433 Connecting rope; 433a First connecting rope; 433b Second connecting rope; 434 Elastic component; 434a First elastic component; 434b Second elastic component; 50 Second mounting mechanism; 51 Second mechanism body; 52 Receiving groove; 521 Opening; 53 Snap-fit ​​groove; 53a First snap-fit ​​groove; 53b Second snap-fit ​​groove; 60 Lifting mechanism; 61 Lifting component; 62 Slider. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0028] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] This application provides a cooling device and a battery pack, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0030] To address the technical problem that existing cooling systems are complex and easily impact the external environment, an embodiment of this application provides a cooling device. The cooling device includes a support base, within which are disposed a heat dissipation cavity, a cooling cavity, a first flow path structure, and a second flow path structure. The cooling cavity and the heat dissipation cavity are fluidly connected through the first and second flow path structures, respectively. The cooling cavity stores coolant and a cooling medium, which cools the coolant in the cooling cavity. The support base also includes a top plate adjacent to the heat dissipation cavity, supporting the battery module. A pump body is disposed in the heat dissipation cavity and / or the cooling cavity. The coolant in the cooling cavity is pumped to the heat dissipation cavity through the first flow path structure by the pump body. The coolant in the heat dissipation cavity exchanges heat through the top plate to dissipate heat from the battery module. The coolant in the heat dissipation cavity also flows back to the cooling cavity through the second flow path structure, circulating between the heat dissipation cavity and the cooling cavity. This will be described in detail below.

[0031] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the battery pack of this application.

[0032] In one embodiment, the battery pack 10 includes a battery module 30, which comprises a group of batteries. The battery pack 10 also includes a cooling device 20, on which the battery module 30 is disposed, and the cooling device 20 is used to dissipate heat and cool the battery module 30.

[0033] The battery pack 10 includes, but is not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. The battery pack 10 is used to provide electrical energy to electrical devices. Electrical devices can be electric vehicles, ships, spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0034] In one embodiment, the cooling device 20 includes a support base 21. The support base 21 is the basic carrier of the cooling device 20, the battery module 30 is specifically supported on the support base 21, and the support base 21 is also used to support and protect the other components of the cooling device 20.

[0035] Specifically, the support base 21 includes a top plate 211, which supports the battery module 30. A heat dissipation cavity 212 is provided within the support base 21, adjacent to the top plate 211. That is, the inner surface of the top plate 211 serves as the inner wall of the heat dissipation cavity 212, allowing the coolant in the heat dissipation cavity 212 to directly act on the top plate 211, thereby cooling the battery module 30. The support base 21 also includes a first flow path structure 22a and a second flow path structure 22b, both disposed within the support base 21. The support base 21 further includes a cooling cavity 213, disposed within the support base 21. The cooling cavity 213 is fluidly connected to the heat dissipation cavity 212 via the first flow path structure 22a and the second flow path structure 22b, respectively. The cooling cavity 213 is used to hold the cooling medium and store a certain amount of coolant. The cooling device 20 also includes a pump body, which is disposed in the heat dissipation chamber 212 and / or the cooling chamber 213. The pump body is used to circulate the coolant between the heat dissipation chamber 212 and the cooling chamber 213.

[0036] The cooling device 20 is used to dissipate heat from the battery module 30 using coolant. The coolant in the cooling chamber 213 is transported to the heat dissipation chamber 212 through the first flow path structure 22a. The coolant in the heat dissipation chamber 212 dissipates heat from the battery module 30 through the top plate 211. The coolant in the heat dissipation chamber 212 also flows back to the cooling chamber 213 through the second flow path structure 22b. The cooling medium is used to cool the coolant in the cooling chamber 213.

[0037] The coolant in the heat dissipation cavity 212 exchanges heat with the battery module 30 through the top plate 211. The heat generated by the battery module 30 during operation can be conducted to the coolant in the heat dissipation cavity 212 through the top plate 211, thereby dissipating heat from the battery module 30. After absorbing heat from the battery module 30, the coolant in the heat dissipation cavity 212 increases in temperature. The high-temperature coolant flows back to the cooling cavity 213 through the second flow path structure 22b. The cooling medium in the cooling cavity 213 cools down the high-temperature coolant that flows back to the cooling cavity 213, resulting in a low-temperature coolant. The low-temperature coolant continues to be transported to the heat dissipation cavity 212 through the first flow path structure 22a to dissipate heat from the battery module 30. This cycle repeats to dissipate heat and cool the battery module 30.

[0038] In this embodiment, the cooling device 20 cools the coolant flowing back to the cooling chamber 213 using a cooling medium in the cooling chamber 213. That is, the cooling device 20 itself is equipped with a cold source for cooling the coolant. The high-temperature coolant after dissipating heat from the battery module 30 does not need to rely on an external system for cooling, thus simplifying the cooling device 20 and reducing the heat dissipation cost of the battery module 30. Furthermore, in this embodiment, the heat dissipation chamber 212 and the cooling chamber 213 form a complete coolant circulation loop through a first flow path structure 22a and a second flow path structure 22b. The high-temperature coolant after dissipating heat from the battery module 30 is cooled by the cooling medium and then reused to dissipate heat from the battery module 30, rather than being directly discharged into the external environment. Therefore, the impact of the cooling device 20 on the external environment can be reduced.

[0039] Optionally, the cooling medium can be a low-temperature medium such as dry ice, and there is no limitation on this. After the cooling medium in the cooling chamber 213 is consumed or the cooling effect is insufficient, the cooling medium can be replenished or replaced in the cooling chamber 213.

[0040] In one embodiment, the first flow path structure 22a includes a buffer cavity 214. The buffer cavity 214 is disposed within the support 21 and is in fluid communication with both the heat dissipation cavity 212 and the cooling cavity 213. The coolant from the cooling cavity 213 is mixed with the coolant in the buffer cavity 214 and then transported to the heat dissipation cavity 212.

[0041] Considering that the coolant temperature after being cooled by the cooling medium may be too low, if the cooled coolant is directly supplied to the heat dissipation cavity 212 to exchange heat with the battery module 30, it may easily lead to the battery module 30 becoming overcooled. Therefore, this embodiment provides a buffer cavity 214. The cooled coolant is first supplied to the buffer cavity 214, which acts as a buffer. After the cooled coolant mixes with the coolant in the buffer cavity 214, the temperature of the coolant is maintained within a reasonable range, preventing the battery module 30 from becoming overcooled due to direct heat exchange with the excessively cold coolant.

[0042] Furthermore, the volume of the buffer cavity 214 is greater than or equal to the volume of the cooling cavity 213, preferably the volume of the buffer cavity 214 is greater than the volume of the cooling cavity 213. In this way, by setting the buffer cavity 214 to have a larger volume, this embodiment helps to ensure the buffering effect of the buffer cavity 214, and further can keep the temperature of the coolant in the buffer cavity 214 within a reasonable range, thereby greatly avoiding the problem of the battery module 30 being too cold.

[0043] Furthermore, the heat dissipation cavity 212 and the cooling cavity 213 are located on the same side of the buffer cavity 214, and the cooling cavity 213 is located on the side of the heat dissipation cavity 212 away from the top plate 211. In this way, this embodiment can reasonably arrange the heat dissipation cavity 212, the cooling cavity 213, and the buffer cavity 214, which is beneficial for designing a larger volume for the buffer cavity 214. Moreover, the cooling cavity 213 is far away from the top plate 211 relative to the heat dissipation cavity 212, which can avoid the problem of the battery module 30 being too cold due to the lower temperature coolant in the cooling cavity 213 directly exchanging heat with the battery module 30. At the same time, the heat dissipation cavity 212 is close enough to the battery module 30, which is beneficial for ensuring the heat dissipation effect of the coolant in the heat dissipation cavity 212.

[0044] Furthermore, the buffer cavity 214 is adjacent to the top plate 211, allowing the coolant in the buffer cavity 214 to dissipate heat from the battery module 30 through the top plate 211. In other words, in this embodiment, in addition to the heat dissipation cavity 212 being adjacent to the top plate 211 to dissipate heat from the battery module 30, the buffer cavity 214 is also adjacent to the top plate 211 so that the coolant in the buffer cavity 214 can also dissipate heat from the battery module 30. The temperature of the coolant in the buffer cavity 214 is within a reasonable range and is therefore suitable for dissipating heat from the battery module 30, thus further ensuring the heat dissipation efficiency and effect of the battery module 30.

[0045] In one embodiment, the cooling device 20 further includes a stirring member 231 and a stirring drive member 232. The stirring member 231 is rotatably disposed in the buffer chamber 214, and is used to mix the coolant from the cooling chamber 213 with the coolant in the buffer chamber 214. The stirring drive member 232 is fixedly connected to the support base 21 and is drively connected to the stirring member 231, and is used to drive the stirring member 231 to rotate.

[0046] In this embodiment, the stirring drive 232 drives the stirring component 231 to rotate, causing the stirring component 231 to mix the coolant from the cooling chamber 213 with the coolant in the buffer chamber 214. The stirring component 231 can accelerate the mixing speed of the coolant, so that the coolant in the cooling chamber 213 can reach a stable temperature as soon as possible after being transported to the buffer chamber 214, further avoiding the problem of the battery module 30 being too cold.

[0047] Optionally, the stirring drive 232 can be a driving element such as a motor. The stirring component 231 may include a rotating rod and a stirring rod, with the stirring rod disposed on the rotating rod. The rotating rod is connected to the stirring drive 232 in a transmission manner, and the stirring drive 232 can drive the rotating rod to rotate around its own central axis, so that the stirring rod on the rotating rod rotates synchronously with the rotating rod, thereby causing the stirring rod to agitate the coolant in the buffer chamber 214 to accelerate the mixing speed of the coolant.

[0048] In one embodiment, the pump body includes a first pump body 221 disposed in a buffer cavity 214. The first flow path structure 22a further includes a first delivery pipe 222, one end of which is connected to the first pump body 221, and the other end is connected to a heat dissipation cavity 212. The first pump body 221 is used to deliver the mixed coolant to the heat dissipation cavity 212 through the first delivery pipe 222. The flow direction of the coolant is as follows: Figure 1 As indicated by the dashed arrow.

[0049] In one embodiment, the pump body includes a second pump body 223, which is disposed in the cooling chamber 213. The first flow path structure 22a further includes a second delivery pipe 224, one end of which is connected to the second pump body 223, and the other end is connected to the buffer chamber 214. The second pump body 223 is used to deliver the coolant cooled by the cooling medium to the buffer chamber 214 through the second delivery pipe 224. The flow direction of the coolant is as follows: Figure 1 As indicated by the dashed arrow.

[0050] In one embodiment, the cooling device 20 further includes a heat dissipation pipe 24. The heat dissipation pipe 24 is disposed in the heat dissipation cavity 212 and is connected to the first delivery pipe 222. The heat dissipation pipe 24 is provided with a plurality of nozzles 241, and the coolant in the heat dissipation pipe 24 is sprayed out through the nozzles 241 to the top plate 211 to dissipate heat from the battery module 30.

[0051] The first pump body 221 delivers the mixed coolant to the heat dissipation pipe 24 through the first delivery pipe 222. The nozzle 241 on the heat dissipation pipe 24 is positioned facing the top plate 211, and the coolant in the heat dissipation pipe 24 is sprayed out onto the top plate 211 through the nozzle 241. The coolant on the top plate 211 exchanges heat with the battery module 30 through the top plate 211 to dissipate heat from the battery module 30. Afterwards, the coolant that is not sprayed out from the heat dissipation pipe 24 and the coolant sprayed into the heat dissipation cavity 212 are all returned to the cooling cavity 213 through the second flow path structure 22b. Figure 1 An example is shown where a plurality of nozzles 241 are provided on the heat pipe 24, and the plurality of nozzles 241 are arranged sequentially along the extension direction of the heat pipe 24.

[0052] Furthermore, the support base 21 also includes a partition 215, which is disposed between the heat dissipation cavity 212 and the cooling cavity 213, separating them. The second flow path structure 22b includes a return port 2151, which is located in the partition 215. The coolant sprayed from the nozzle 241 flows back to the cooling cavity 213 through the return port 2151. For example, the surface of the partition 215 facing the heat dissipation pipe 24 is inclined, and this inclined surface slopes towards the return port 2151 to guide the coolant to flow to the return port 2151, and then back to the cooling cavity 213 through the return port 2151. The flow direction of the coolant is as follows: Figure 1 As indicated by the dashed arrow.

[0053] Furthermore, the second flow path structure 22b includes a connecting pipe 25, which is located outside the support base 21. The heat dissipation pipe 24 is in fluid communication with the cooling chamber 213 through the connecting pipe 25, and the coolant in the heat dissipation pipe 24 flows back to the cooling chamber 213 through the connecting pipe 25. The flow direction of the coolant is as follows: Figure 1 As indicated by the dashed arrow.

[0054] Therefore, the second flow path structure 22b of this embodiment includes two return paths. First, the coolant in the heat dissipation pipe 24 is sprayed from the nozzle 241 to the top plate 211, then flows along the wall of the heat dissipation cavity 212 to the return port 2151, and then returns to the cooling cavity 213 through the return port 2151. Second, the coolant that is not sprayed from the heat dissipation pipe 24 flows back to the cooling cavity 213 along the connecting pipe 25. In this way, the coolant that is not sprayed from the heat dissipation pipe 24 and the coolant sprayed into the heat dissipation cavity 212 can be recovered, further cooled by the cooling medium in the cooling cavity 213, and reused to dissipate heat from the battery module 30, which helps to ensure a good cooling circulation loop between the heat dissipation cavity 212 and the cooling cavity 213.

[0055] In one embodiment, the battery pack 10 further includes a first direction (e.g., Figure 1(As indicated by the middle arrow Z, the same applies below), the battery module 30 is disposed on the cooling device 20 along the first direction. The battery pack 10 also includes a first mounting mechanism 40, which is connected to one of the battery module 30 and the cooling device 20. The battery pack 10 also includes a second mounting mechanism 50, which is connected to the other of the battery module 30 and the cooling device 20, and the first mounting mechanism 40 and the second mounting mechanism 50 are disposed opposite to each other along the first direction. The battery pack 10 also includes a lifting mechanism 60, which is drively connected to the first mounting mechanism 40 and / or the second mounting mechanism 50. The lifting mechanism 60 is used to drive the first mounting mechanism 40 and the second mounting mechanism 50 to move closer to each other, and the first mounting mechanism 40 and the second mounting mechanism 50 are connected and fixed to fix the battery module 30 to the cooling device 20.

[0056] When the battery module 30 needs to be assembled with the cooling device 20, the battery module 30 is placed on the cooling device 20. Then, the lifting mechanism 60 is controlled to drive the first mounting mechanism 40 and the second mounting mechanism 50 closer together, so that the first mounting mechanism 40 and the second mounting mechanism 50 are connected and fixed to secure the battery module 30 to the cooling device 20. When the battery module 30 needs to be separated from the cooling device 20, the connection between the first mounting mechanism 40 and the second mounting mechanism 50 can be released. Then, the lifting mechanism 60 is controlled to drive the first mounting mechanism 40 and the second mounting mechanism 50 away from each other, thereby allowing the battery module 30 to be removed from the cooling device 20.

[0057] Through the above methods, this embodiment achieves automated assembly of the battery module 30 and the cooling device 20 via the lifting mechanism 60, thus improving the assembly efficiency of the battery module 30 and the cooling device 20. Furthermore, this embodiment also achieves automated disassembly of the battery module 30 and the cooling device 20 via the lifting mechanism 60, improving the disassembly efficiency. Compared to the prior art where the battery module 30 and the cooling system are glued together, making disassembly difficult, this embodiment employs a detachable connection design for the first mounting mechanism 40 and the second mounting mechanism 50, facilitating the assembly and disassembly of the battery module 30 and the cooling device 20.

[0058] For example, Figure 1 This example illustrates the transmission connection between the lifting mechanism 60 and the second mounting mechanism 50. Of course, in other embodiments of this application, the lifting mechanism 60 may be transmission-connected to the first mounting mechanism 40, or the lifting mechanism 60 may be transmission-connected to both the first mounting mechanism 40 and the second mounting mechanism 50. This embodiment uses the transmission connection between the lifting mechanism 60 and the second mounting mechanism 50 as an example for illustrative purposes only and is not intended to limit the scope of the application.

[0059] Furthermore, please combine Figure 3 The cooling device 20 has a groove 216 extending along a first direction. The lifting mechanism 60 includes a lifting member 61 and a slider 62. The slider 62 is drivenly connected to the lifting member 61, and the slider 62 is also drivenly connected to either the first mounting mechanism 40 or the second mounting mechanism 50. In this embodiment, the slider 62 is specifically drivenly connected to the second mounting mechanism 50. The lifting member 61 drives the slider 62 to slide along the groove 216, causing the first mounting mechanism 40 and the second mounting mechanism 50 to move closer to each other.

[0060] Optionally, the lifting component 61 can be a power element such as an electric telescopic rod that can drive the slider 62 to slide in the first direction, and there is no limitation on it.

[0061] In one embodiment, please refer to the following: Figure 2 The first mounting mechanism 40 includes a first mechanism body 41. The first mechanism body 41 is the basic carrier of the first mounting mechanism 40, and it supports and protects the other components of the first mounting mechanism 40. The first mechanism body 41 is connected to the battery module 30. The first mounting mechanism 40 also includes a snap-fit ​​block 42, which is retractably disposed on the first mechanism body 41. The first mounting mechanism 40 also includes a drive assembly 43, which is disposed on the first mechanism body 41 and is pulsatorically connected to the snap-fit ​​block 42. The drive assembly 43 is used to drive the snap-fit ​​block 42 to extend or retract relative to the first mechanism body 41.

[0062] Please refer to the following: Figure 3 The second mounting mechanism 50 includes a second mechanism body 51. The second mechanism body 51 serves as the basic carrier of the second mounting mechanism 50, and it supports and protects the remaining components of the second mounting mechanism 50. The second mechanism body 51 is fixedly connected to the cooling device 20. The second mechanism body 51 has a receiving groove 52 and a snap-fit ​​groove 53. The receiving groove 52 and the snap-fit ​​groove 53 are interconnected. The receiving groove 52 has an opening 521 facing the snap-fit ​​block 42, through which the snap-fit ​​block 42 is inserted into the receiving groove 52.

[0063] When the battery module 30 and the cooling device 20 need to be assembled, the lifting mechanism 60 drives the first mounting mechanism 40 and the second mounting mechanism 50 to move closer to each other. Simultaneously, the driving component 43 drives the latching block 42 to retract relative to the first mechanism body 41, allowing the latching block 42 to be inserted into the receiving groove 52 through the opening 521. After the latching block 42 is inserted into the receiving groove 52, the driving component 43 then drives the latching block 42 to extend relative to the first mechanism body 41, causing the latching block 42 to be inserted into the latching slot 53. This connects and fixes the first mounting mechanism 40 and the second mounting mechanism 50 to secure the battery module 30 to the cooling device 20. Figure 4As shown. The process of disconnecting the first mounting mechanism 40 and the second mounting mechanism 50 is the reverse of the aforementioned process, and will not be described again here.

[0064] Specifically, such as Figure 2 and Figure 3 As shown, both the receiving groove 52 and the snap-fit ​​groove 53 include a bottom wall and a side wall. The side wall 522 of the receiving groove 52 and the side wall 531 of the snap-fit ​​groove 53 are connected to allow the snap-fit ​​block 42 to extend from the receiving groove 52 into the snap-fit ​​groove 53. The snap-fit ​​groove 53 also includes a top wall 533 opposite to its bottom wall 532. The driving component 43 drives the snap-fit ​​block 42 to retract, so that the snap-fit ​​block 42 enters the receiving groove 52. The driving component 43 then drives the snap-fit ​​block 42 to extend, so that the snap-fit ​​block 42 is embedded in the snap-fit ​​groove 53. The top wall 533 and the snap-fit ​​block 42 abut against each other to restrict the movement of the snap-fit ​​block 42 along the first direction, thereby connecting and fixing the first mounting mechanism 40 and the second mounting mechanism 50. That is, the receiving groove 52 is an open groove that penetrates the top surface of the second mechanism body 51, while the snap-fit ​​groove 53 does not penetrate the top surface of the second mechanism body 51 to form a top wall 533.

[0065] Furthermore, define a reference plane (such as...) Figure 4 As shown in the mid-plane α (hereinafter the same), the reference plane is perpendicular to the first direction. When the snap-fit ​​block 42 retracts, the orthographic projection of the first mounting mechanism 40 on the reference plane is within the orthographic projection of the opening 521 on the reference plane, so that both the first mechanism body 41 and the snap-fit ​​block 42 can be embedded in the receiving groove 52.

[0066] In one embodiment, the drive assembly 43 includes a telescopic drive member 431, which is the power element of the drive assembly 43 and provides power to the latching block 42. The drive assembly 43 also includes a rotating roller 432, which is connected to the telescopic drive member 431 and can drive the rotating roller 432 to rotate around its own central axis. The drive assembly 43 also includes a connecting rope 433, which can be wound around the rotating roller 432, with one end fixedly connected to the rotating roller 432 and the other end connected to the latching block 42. The drive assembly 43 also includes an elastic member 434, with one end connected to the latching block 42 and the other end connected to the first mechanism body 41, located between the latching block 42 and the rotating roller 432. The elastic member 434 is compressed when the latching block 42 retracts and recovers when it extends.

[0067] The telescopic drive member 431 is used to drive the rotating roller 432 to rotate, so as to wind up the connecting rope 433 through the rotating roller 432, causing the locking block 42 to retract. The telescopic drive member 431 is also used to drive the rotating roller 432 to rotate in the opposite direction, so as to unwind the connecting rope 433 through the rotating roller 432, and the elastic member 434 drives the locking block 42 to extend in response to its own elastic restoring force. It can be understood that since the elastic member 434 is in a compressed state; the elastic member 434 drives the rotating roller 432 to rotate in the opposite direction in response to its own elastic restoring force, and further drives the telescopic drive member 431 to rotate in the opposite direction, so as to unwind the connecting rope 433 through the rotating roller 432, and the elastic member 434 further drives the locking block 42 to extend, without having to drive the telescopic drive member 431 to rotate by electricity, which can save electricity to a certain extent.

[0068] Optionally, the telescopic drive component 431 can be a power element such as a motor, which will not be described in detail here.

[0069] Furthermore, the main body 41 of the first mechanism has a locking block cavity 411 and a rotating roller cavity 412. The locking block cavity 411 has a first opening 4111 and a second opening 4112 at opposite ends, i.e., the first opening 4111 is located at one end of the locking block cavity 411, and the second opening 4112 is located at the other end of the locking block cavity 411. A locking block 42 is disposed in the locking block cavity 411, and the locking block 42 is movable relative to the locking block cavity 411, extending or retracting through the first opening 4111. A rotating roller 432 is rotatably disposed in the rotating roller cavity 412, and the rotating roller cavity 412 communicates with the locking block cavity 411 through the second opening 4112. A connecting rope 433 passes through the second opening 4112 from the rotating roller 432 and connects to the locking block 42.

[0070] The elastic element 434 is disposed on the side of the locking block 42 facing the second opening 4112. Specifically, the elastic element 434 is clamped between the locking block 42 and the cavity wall of the locking block cavity 411 surrounding the second opening 4112. When the roller 432 winds the connecting rope 433, the connecting rope 433 drives the locking block 42 to move toward the second opening 4112, causing the locking block 42 to compress the elastic element 434; while when the roller 432 unwinds the connecting rope 433, the elastic element 434, in response to its own elastic restoring force, drives the locking block 42 to move away from the second opening 4112, causing the locking block 42 to extend through the first opening 4111.

[0071] Of course, in other embodiments of this application, the elastic element 434 may also be disposed on the side of the locking block 42 away from the second opening 4112. In this way, when the roller 432 winds up the connecting rope 433, the connecting rope 433 drives the locking block 42 to stretch the elastic element 434. The embodiments of this application are described using the example of the elastic element 434 being disposed on the side of the locking block 42 facing the second opening 4112, only for the purpose of discussion and not as a limitation.

[0072] Furthermore, the latching block 42 includes a latching portion 421 and a limiting portion 422. The latching portion 421 extends or retracts through the first opening 4111. The limiting portion 422 connects to the latching portion 421 and is located within the latching block cavity 411. Specifically, the elastic member 434 is clamped between the latching portion 421 and the cavity wall of the latching block cavity 411 surrounding the second opening 4112.

[0073] Battery pack 10 also includes a second direction (such as...) Figure 2 and Figure 3 (As indicated by the middle arrow X, the same below), the second direction is perpendicular to the first direction, and the second direction X can be the length direction of the battery pack 10. The latching block 42 moves along the second direction to extend or retract relative to the first mechanism body 41. Both the limiting part 422 and the first opening 4111 have a cross-section perpendicular to the second direction, wherein the cross-sectional area of ​​the limiting part 422 is larger than the cross-sectional area of ​​the first opening 4111. During the process of the latching part 421 extending through the first opening 4111, the limiting part 422 cannot pass through the first opening 4111 and abut against the cavity wall of the latching block cavity 411 around the first opening 4111, thereby limiting the further extension of the latching part 421.

[0074] In one embodiment, two locking blocks 42 are provided, including a first locking block 42a and a second locking block 42b. The first locking block 42a and the second locking block 42b are symmetrically distributed on the first mechanism body 41, specifically, the first locking block 42a and the second locking block 42b are arranged on both sides of the rotating roller 432 along the second direction. Specifically, the rotating roller cavity 412 has two locking block cavities 411 symmetrically distributed on both sides in the second direction, and the first locking block 42a and the second locking block 42b are respectively disposed in the corresponding locking block cavities 411. The connecting rope 433 includes a first connecting rope 433a and a second connecting rope 433b. One end of the first connecting rope 433a is fixedly connected to the rotating roller 432, and the other end is connected to the first locking block 42a. Similarly, one end of the second connecting rope 433b is fixedly connected to the rotating roller 432, and the other end is connected to the second locking block 42b. The rotating roller 432 is used to synchronously wind or unwind the first connecting rope 433a and the second connecting rope 433b, so that the first locking block 42a and the second locking block 42b can retract or extend synchronously. The elastic element 434 includes a first elastic element 434a and a second elastic element 434b. One end of the first elastic element 434a is connected to the first locking block 42a, and the other end is connected to the first mechanism body 41. One end of the second elastic element 434b is connected to the second locking block 42b, and the other end is connected to the first mechanism body 41.

[0075] Correspondingly, the card slot 53 includes a first card slot 53a and a second card slot 53b. The first card slot 53a and the second card slot 53b are respectively located at both ends of the receiving slot 52 in the second direction. The driving assembly 43 is used to drive the first card block 42a and the second card block 42b to move in opposite directions along the second direction, so that the first card block 42a is inserted into the first card slot 53a and the second card block 42b is inserted into the second card slot 53b.

[0076] like Figures 2 to 4As shown, when the battery module 30 and the cooling device 20 need to be assembled, the lifting mechanism 60 drives the first mounting mechanism 40 and the second mounting mechanism 50 to move closer to each other. At the same time, the rotating roller 432 synchronously winds up the first connecting rope 433a and the second connecting rope 433b, driving the first locking block 42a and the second locking block 42b to move towards each other in the second direction, so that the first locking block 42a and the second locking block 42b are both retracted into the first mechanism body 41, so that the first mounting mechanism 40 can be embedded in the receiving groove 52. After the first mounting mechanism 40 is inserted into the receiving groove 52, the rotating roller 432 synchronously unwinds the first connecting rope 433a and the second connecting rope 433b. The first elastic element 434a and the second elastic element 434b, in response to their respective elastic restoring forces, drive the first locking block 42a and the second locking block 42b to move in opposite directions along the second direction, causing the first locking block 42a to engage with the first locking groove 53a and the second locking block 42b to engage with the second locking groove 53b, thereby fixing the first mounting mechanism 40 and the second mounting mechanism 50 together. The process of disengaging the first mounting mechanism 40 and the second mounting mechanism 50 is the reverse of the aforementioned process and will not be described further here.

[0077] In summary, the cooling device of this application cools the coolant flowing back to the cooling chamber through a cooling medium in the cooling chamber. That is, the cooling device itself is equipped with a cold source for cooling the coolant. The high-temperature coolant after dissipating heat from the battery module does not need to rely on an external system for cooling, thus simplifying the cooling device and reducing the heat dissipation cost of the battery module. Furthermore, the heat dissipation chamber and the cooling chamber of this application form a complete coolant circulation loop through a first flow path structure and a second flow path structure. The high-temperature coolant after dissipating heat from the battery module is cooled by the cooling medium and then reused to dissipate heat from the battery module, rather than being directly discharged into the external environment, thus reducing the impact of the cooling device on the external environment.

[0078] The cooling device and battery pack provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A cooling device, characterized in that, include: A support base is provided with a heat dissipation cavity, a cooling cavity, a first flow path structure, and a second flow path structure. The cooling cavity and the heat dissipation cavity are fluidly connected through the first flow path structure and the second flow path structure, respectively. The cooling cavity is used to store coolant and a cooling medium. The cooling medium is used to cool the coolant in the cooling cavity. The support base also includes a top plate and a partition. The top plate is adjacent to the heat dissipation cavity to support the battery module. The partition is disposed between the heat dissipation cavity and the cooling cavity to separate the two. The pump body is disposed in the heat dissipation cavity and / or the cooling cavity; The coolant in the cooling chamber is transported to the heat dissipation chamber through the first flow path structure under the action of the pump body. The coolant in the heat dissipation chamber exchanges heat through the top plate to dissipate heat from the battery module. The coolant in the heat dissipation chamber also flows back to the cooling chamber through the second flow path structure. The coolant circulates between the heat dissipation chamber and the cooling chamber. The first flow path structure includes: A buffer chamber is disposed within the support base and is in fluid communication with the heat dissipation chamber and the cooling chamber respectively. The coolant from the cooling chamber is mixed with the coolant in the buffer chamber and then transported to the heat dissipation chamber. The buffer chamber is adjacent to the top plate, so that the coolant in the buffer chamber can dissipate heat from the battery module through the top plate. The second flow path structure includes: A return port is provided in the partition section, through which the coolant sprayed from the nozzle flows back to the cooling chamber; A connecting pipe is located outside the support base, with one end connected to the heat dissipation pipe and the other end connected to the cooling cavity. The coolant in the heat dissipation pipe flows back to the cooling cavity through the connecting pipe. The cooling device also includes: A heat dissipation pipe is disposed in the heat dissipation cavity. The heat dissipation pipe includes several nozzles. The coolant in the heat dissipation pipe is sprayed out to the top plate through the nozzles to dissipate heat from the battery module. Then, the coolant flows along the cavity wall of the heat dissipation cavity to the return port and flows back to the cooling cavity through the return port. The coolant that is not sprayed out in the heat dissipation pipe flows back to the cooling cavity through the connecting pipe.

2. The cooling device according to claim 1, characterized in that, The volume of the buffer chamber is greater than or equal to the volume of the cooling chamber.

3. The cooling device according to claim 1, characterized in that, The cooling device also includes: A stirring component, rotatably disposed in the buffer chamber, is used to mix the coolant from the cooling chamber with the coolant in the buffer chamber; and A stirring drive is fixedly connected to the support base and is drively connected to the stirring component, used to drive the stirring component to rotate.

4. The cooling device according to claim 1, characterized in that, The pump body includes: The first pump body is disposed in the buffer cavity; The first flow path structure also includes: A first delivery pipe, one end of which is connected to the first pump body and the other end of which is connected to the heat dissipation cavity, wherein the first pump body is used to deliver the mixed coolant to the heat dissipation cavity through the first delivery pipe.

5. The cooling device according to claim 1, characterized in that, The heat dissipation cavity and the cooling cavity are located on the same side of the buffer cavity, and the cooling cavity is located on the side of the heat dissipation cavity away from the top plate.

6. The cooling device according to claim 1, characterized in that, The pump body includes: The second pump body is located in the cooling chamber; The first flow path structure also includes: The second delivery pipe has one end connected to the second pump body and the other end connected to the buffer chamber. The second pump body is used to deliver the coolant cooled by the cooling medium to the buffer chamber through the second delivery pipe.

7. The cooling device according to claim 4, characterized in that, The heat dissipation cavity is connected to the first delivery pipe.

8. A battery pack, characterized in that, It includes a battery module and a cooling device as described in any one of claims 1 to 7, wherein the battery module is disposed on the cooling device, and the cooling device exchanges heat with the battery module.

9. The battery pack according to claim 8, characterized in that, The battery pack includes a first direction, which is the height direction of the battery pack, and the battery module is disposed on the cooling device along the first direction; The battery pack also includes: A first mounting mechanism is connected to one of the battery module and the cooling device; A second mounting mechanism is connected to the other of the battery module and the cooling device, and the first mounting mechanism and the second mounting mechanism are arranged opposite to each other along the first direction; and A lifting mechanism is connected to the first mounting mechanism and / or the second mounting mechanism for driving the first mounting mechanism and the second mounting mechanism to move closer to each other. The first mounting mechanism and the second mounting mechanism are connected and fixed to fix the battery module to the cooling device.

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