Liquid cooling device and battery

Abstract

The embodiment of the invention provides a liquid cooling device and a battery, and relates to the field of batteries. The liquid cooling device comprises a plurality of liquid cooling plates, a liquid inlet main pipeline and a liquid outlet main pipeline, the plurality of liquid cooling plates are arranged in parallel at intervals, a containing cavity used for containing a battery cell is formed between every two adjacent liquid cooling plates, liquid flow channels are formed in the liquid cooling plates, the two ends of each liquid flow channel are provided with a liquid inlet and a liquid outlet respectively, the liquid inlet main pipeline is connected to the liquid inlet, and the liquid outlet main pipeline is connected to the liquid outlet. The liquid outlet main pipeline is connected to the liquid outlet; and the liquid cooling plate is also provided with a plurality of sealed buffer chambers. Due to the fact that the liquid cooling plate is provided with the buffer cavity, when the battery cell expands in the charging and discharging process, the buffer cavity can absorb expansion deformation of the battery cell, and when the battery cell contracts, the buffer cavity can rebound and restore, the liquid cooling plate can be tightly attached to the wall face of the battery cell all the time, and the efficient heat dissipation efficiency of the battery cell is guaranteed. The embodiment of the invention also provides a battery. The battery comprises the liquid cooling device.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and more particularly, to a liquid cooling device and a battery. Background Art

[0002] During the charging and discharging process of a battery pack, technicians have found that the size of the battery cells will undergo periodic expansion and contraction. Since the battery pack generates heat during use, the battery cells in the battery pack need to be cooled. Currently, most battery packs use liquid cooling for heat dissipation, such as using a liquid cooling plate to cover the outside of the battery cells. When the size of the battery cells changes due to charging and discharging, since the currently used liquid cooling plate has non - telescopic properties due to its own structure, it cannot expand and contract synchronously with the battery cells, cannot effectively fit with the battery cells, and the liquid cooling efficiency is low. Summary of the Invention

[0003] The present invention provides a liquid cooling device and a battery, which can adapt to the size change of the battery cells, always fit well with the battery cells, and ensure high cooling efficiency.

[0004] Embodiments of the present invention may be implemented as follows:

[0005] An embodiment of the present invention provides a liquid cooling device, which includes:

[0006] A liquid inlet main pipeline;

[0007] A liquid outlet main pipeline;

[0008] A plurality of liquid cooling plates, which are arranged at intervals and side by side. An accommodation cavity for placing battery cells is formed between two adjacent liquid cooling plates; a liquid flow channel is provided inside the liquid cooling plate, and the two ends of the liquid flow channel are respectively a liquid inlet and a liquid outlet. The liquid inlet is communicated with the liquid inlet main pipeline, and the liquid outlet is communicated with the liquid outlet main pipeline; the liquid cooling plate is also provided with a plurality of buffer chambers.

[0009] Optionally, the liquid cooling plate includes a first side plate and a second side plate, and the first side plate and the second side plate are in face - to - face contact;

[0010] The first side plate has a strip - shaped protrusion and an annular protrusion, and both the strip - shaped protrusion and the annular protrusion are in contact with the second side plate; the strip - shaped protrusion is used to divide the liquid flow channel into a plurality of branch channels, and the annular protrusion and the second side plate are in contact to form a buffer chamber.

[0011] Optionally, the back side of the strip - shaped protrusion is a strip - shaped groove, and the back side of the annular protrusion is an annular groove, and both the strip - shaped groove and the annular groove are filled with a heat - conducting colloid.

[0012] Optionally, the width of the annular protrusion near the liquid inlet and the liquid outlet is increased to reduce the pressure drop of the liquid flow channel.

[0013] Optionally, the first side plate and the second side plate are connected by welding, and a spacer block is arranged at the welding joint. The spacer blocks are arranged along the edge of the liquid cooling plate so that the thickness of the edge of the liquid cooling plate is the same as the thickness of the middle part of the liquid cooling plate.

[0014] Optionally, a plurality of shrinkage notches are arranged at intervals in the length direction of the liquid cooling plate to change the local flow direction and the cross-sectional size of the flow passage of the liquid flow.

[0015] Optionally, water nozzles are connected to both the liquid inlet and the liquid outlet. The water nozzle on the liquid inlet side is movably connected and communicated with the main liquid inlet pipeline; and / or, the water nozzle on the liquid outlet side is movably connected and communicated with the main liquid outlet pipeline.

[0016] Optionally, the liquid cooling device further includes a sleeve, which is sleeved on the water nozzle, and the sleeve is used to connect two water nozzles on adjacent liquid cooling plates;

[0017] A sealing ring groove is arranged on the outer wall of the water nozzle, and a sealing ring is installed in the sealing ring groove. The water nozzle and the sleeve are hermetically connected through the sealing ring.

[0018] Optionally, the liquid flow passage includes a first side liquid flow passage and a second side liquid flow passage. The first side liquid flow passage and the second side liquid flow passage are respectively located on both side parts of the liquid cooling plate, and both the liquid inlet and the liquid outlet are located in the middle of the first side liquid flow passage and the second side liquid flow passage.

[0019] An embodiment of the present invention further provides a battery, which includes a plurality of battery cells and the liquid cooling device described above. The plurality of battery cells are respectively installed in a plurality of accommodation cavities of the liquid cooling device.

[0020] Advantages of the embodiment of the present invention:

[0021] The liquid cooling device includes a plurality of liquid cooling plates, a main liquid inlet pipeline and a main liquid outlet pipeline. The plurality of liquid cooling plates are arranged at intervals and side by side. An accommodation cavity for placing battery cells is formed between two adjacent liquid cooling plates. The inside of the liquid cooling plate has a liquid flow passage, and the two ends of the liquid flow passage are respectively a liquid inlet and a liquid outlet. The main liquid inlet pipeline is connected to the liquid inlet, and the main liquid outlet pipeline is connected to the liquid outlet; a plurality of buffer chambers are also arranged on the liquid cooling plate. Since the liquid cooling plate is provided with buffer chambers, when the battery cells expand during charging and discharging, the buffer chambers can absorb the expansion deformation of the battery cells. When the battery cells contract, the buffer chambers can rebound and recover, so that the liquid cooling plate can always be closely attached to the wall surface of the battery cells, ensuring that the liquid cooling plate can always efficiently dissipate heat from the battery cells.

[0022] The battery includes a liquid cooling device, which has all the functions of the liquid cooling device. Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic diagram of the overall structure of the liquid cooling device provided in the embodiments of the present invention;

[0025] Figure 2 Schematic diagram of the structure of the thermal conductive colloid and the liquid cooling plate provided in the embodiments of the present invention;

[0026] Figure 3 Schematic diagram of the three-dimensional structure of the liquid cooling plate provided in the embodiments of the present invention;

[0027] Figure 4 Schematic plan view of the liquid cooling plate provided in the embodiments of the present invention;

[0028] Figure 5 For Figure 4 Schematic cross-sectional view taken along A-A in;

[0029] Figure 6 For Figure 4 Schematic cross-sectional view taken along B-B in;

[0030] Figure 7 Schematic diagram of the gap provided between the sleeve and the liquid cooling plate in the embodiments of the present invention.

[0031] Reference numerals: 1 - liquid cooling plate; 10 - liquid flow channel; 101 - first side liquid flow channel; 102 - second side liquid flow channel; 11 - liquid inlet; 12 - liquid outlet; 13 - buffer chamber; 14 - first side plate; 141 - strip protrusion; 142 - annular protrusion; 143 - strip groove; 144 - annular groove; 15 - second side plate; 16 - thermal conductive colloid; 2 - main liquid inlet pipe; 3 - main liquid outlet pipe; 4 - accommodation cavity; 5 - water nozzle; 6 - sealing ring; 7 - sleeve; 70 - gap. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0035] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0037] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0038] Unless otherwise clearly defined and limited, terms such as "arranged", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0040] A battery pack is generally assembled from multiple battery cells. During the charging and discharging process of the battery cells, there will be periodic dimensional changes. However, the liquid cooling plate / liquid cooling tube wrapped outside the battery cells cannot deform synchronously with the battery cells. After long-term use, a large gap will be generated between the liquid cooling plate / liquid cooling tube and the battery cells, resulting in a decrease in the adhesion between the liquid cooling plate / liquid cooling tube and the battery cells and low cooling efficiency.

[0041] Existing liquid cooling systems generally consist of a main pipeline connecting multiple liquid cooling plates. When the battery cells expand or contract, due to the lack of a telescopic buffer structure at the connection between the main pipeline and each liquid cooling plate, the connection is prone to loosening, which may cause the pipeline to disconnect or the seal to fail. In addition, when the number of battery cells in the battery pack is large, the number of liquid cooling plates connected to the main pipeline also increases, resulting in a long flow path of the cooling medium, which is likely to cause uneven distribution of the cooling medium and a large pressure drop, leading to a large temperature difference between the battery cells in different parts of the battery pack.

[0042] In view of this, embodiments of the present invention provide a liquid cooling device and a battery. The liquid cooling device and the battery can solve the above problems. The liquid cooling device can be used for the battery to achieve heat dissipation and temperature reduction of the battery cells. Of course, the liquid cooling device can also be used in other scenarios that require cooling. Next, it will be described in detail.

[0043] Please refer to Figures 1 to 3 , the liquid cooling device includes a plurality of liquid cooling plates 1, an inlet main pipeline 2, and an outlet main pipeline 3. The plurality of liquid cooling plates 1 are arranged at intervals and are arranged side by side in the vertical and horizontal directions. A receiving cavity 4 is formed between two adjacent liquid cooling plates 1 arranged side by side. The receiving cavity 4 is used to place the battery cells, and the battery cells are in contact with the surface of the liquid cooling plate 1. The liquid cooling plate 1 dissipates heat from the battery cells.

[0044] The inside of the liquid cooling plate 1 has a liquid flow channel 10. The liquid cooling plate 1 is provided with an inlet 11 and an outlet 12. The inlet 11 and the outlet 12 are respectively located at both ends of the liquid flow channel 10 and are connected to the liquid flow channel 10. The inlet main pipeline 2 is connected to the inlet 11 and is used to input low-temperature cooling medium into the liquid cooling plate 1; the outlet main pipeline 3 is connected to the outlet 12 and is used to transport the cooling medium that has completed heat exchange in the liquid cooling plate 1. The cooling medium passes through the inlet main pipeline 2, the inlet 11, the liquid flow channel 10, and the outlet 12 in sequence to complete heat exchange with the battery cells, realizing heat dissipation and temperature reduction of the battery cells.

[0045] The liquid cooling plate 1 is also provided with a plurality of buffer chambers 13. Through the buffer chambers 13, the liquid cooling plate 1 can have a certain degree of deformation characteristics, so as to adapt to the dimensional changes when the battery cells expand / contract, so that the surface of the liquid cooling plate 1 can always be closely attached to the wall surface of the battery cells, ensuring that the liquid cooling plate 1 can always efficiently dissipate heat from the battery cells and improving the heat dissipation efficiency.

[0046] In this embodiment, the liquid cooling plate 1 is stamped from two flat plates according to a pre-designed structural shape, and then the two stamped flat plates are welded together. The welding connection method can be laser welding or brazing. It should be noted that the welded joint of the two flat plates needs to ensure tightness to isolate the inside and outside of the liquid cooling plate 1 from each other.

[0047] Specifically, please refer to Figures 4 to 6 , the liquid cooling plate 1 of this embodiment includes a first side plate 14 and a second side plate 15; both the first side plate 14 and the second side plate 15 are flat plates with equal thickness. An annular protrusion 142 and a plurality of strip protrusions 141 are stamped on the first side plate 14. The strip protrusions 141, the annular protrusion 142, and the edge of the first side plate 14 are all in contact with the second side plate 15, so that the first side plate 14 and the second side plate 15 are in contact face to face. The buffer chamber 13 is located between the first side plate 14 and the second side plate 15.

[0048] The strip protrusions 141 are used to divide the liquid flow channel 10 into multiple branch channels, which is used to reduce the pressure drop of the cooling medium inside the liquid cooling plate 1 and improve the uniformity of heat dissipation; while the annular protrusion 142 is in sealed contact with the second side plate 15. The annular protrusion 142 surrounds the middle of the first side plate 14 and has a cavity, and this cavity is the buffer chamber 13. The buffer chamber 13 is filled with air, and through the buffer chamber 13, the liquid cooling plate 1 can adapt to the size change of the battery cell.

[0049] Since both the strip protrusions 141 and the annular protrusion 142 on the first side plate 14 are formed by stamping, the back side of the strip protrusion 141 is a strip groove 143, and the back side of the annular protrusion 142 is an annular groove 144. In order to increase the heat conduction contact area between the liquid cooling plate 1 and the battery cell, the strip groove 143 and the annular groove 144 are both filled with a heat-conducting colloid 16. The heat-conducting colloid 16 can not only increase the heat transfer speed between the liquid cooling plate 1 and the battery cell and improve the heat dissipation efficiency, but also support the liquid cooling plate 1 to prevent the liquid flow channel 10 of the liquid cooling plate 1 from being overly squeezed when the battery cell expands, thereby protecting the liquid flow channel 10.

[0050] It is worth mentioning that a cushion block is provided at the welded joint of the first side plate 14 and the second side plate 15. The cushion block is an L-shaped plastic block, and the cushion block covers the edges of the first side plate 14 and the second side plate 15, so that the edge thickness of the liquid cooling plate 1 is the same as the middle thickness of the liquid cooling plate 1. When the liquid cooling plate 1 is in contact with the battery cell, due to the provision of the cushion block, the edges of the first side plate 14 and the second side plate 15 are prevented from being suspended, and the cushion block can protect and limit the edges of the liquid cooling plate 1 to avoid the possible deformation of the edges of the liquid cooling plate 1. Of course, in other embodiments, other forms of protection measures can also be provided at the edges of the liquid cooling plate 1, and this is not limited here.

[0051] In this embodiment, the outer shape of the liquid cooling plate 1 is generally rectangular. The liquid inlet 11 and the liquid outlet 12 are respectively arranged in the middle of both sides of the short side of the liquid cooling plate 1, and the liquid flow channel 10 extends along the long side of the liquid cooling plate 1.

[0052] The liquid flow channel 10 includes a first side liquid flow channel 101 and a second side liquid flow channel 102. The first side liquid flow channel 101 and the second side liquid flow channel 102 are respectively located on both sides of the long side of the liquid cooling plate 1. Both the liquid inlet 11 and the liquid outlet 12 are located in the middle of the first side liquid flow channel 101 and the second side liquid flow channel 102. Arranging the first side liquid flow channel 101 and the second side liquid flow channel 102 on both sides of the long side of the liquid cooling plate 1 respectively can enable the cooling medium to dissipate heat for the battery cells more evenly. The arrangement of setting the liquid inlet 11 and the liquid outlet 12 in the middle of the short sides on both sides of the liquid cooling plate 1 can make the cooling medium injected from the liquid inlet 11 flow into the first side liquid flow channel 101 and the second side liquid flow channel 102 equally, improving the heat dissipation uniformity of different parts and avoiding too large a temperature difference between different parts of the battery cells.

[0053] In order to reduce the pressure drop of the cooling medium at different parts of the liquid flow channel 10, the annular protrusions 142 at the liquid inlet 11 and the liquid outlet 12 both extend and widen along both sides of the short side of the liquid cooling plate 1. On the one hand, it can make the liquid flow channel 10 bend to reduce the pressure drop of the cooling medium. On the other hand, it reduces the cross-sectional area of the initial section of the liquid flow channel 10, avoiding the increase in the pressure drop speed of the cooling medium, and at the same time enabling the cooling medium to stay in the liquid cooling plate 1 for a longer time, improving the heat exchange efficiency.

[0054] Optionally, when the length of the liquid cooling plate 1 is relatively long, a plurality of contraction notches can also be arranged in the length direction of the liquid cooling plate 1. The contraction notches are used to locally reduce the cross-sectional area of the liquid flow channel 10 and change the local orientation of the liquid flow channel 10, thereby reducing the pressure drop of the cooling medium in the liquid flow channel 10 and making the cooling medium form a turbulent flow in the liquid flow channel 10, improving the heat exchange efficiency.

[0055] As an example, the contraction notches are arranged at equal intervals on one long side of the liquid cooling plate 1, and the opening direction of the contraction notches is substantially the same as the short side direction of the liquid cooling plate 1, thereby changing the flow direction of the liquid flow channel 10 extending along the long side of the liquid cooling plate 1. On the one hand, it reduces the pressure drop of the cooling medium in the liquid flow channel 10. On the other hand, it makes the cooling medium form a turbulent flow locally in the liquid flow channel 10.

[0056] It can be known that the long sides of the strip-shaped protrusion 141 and the annular protrusion 142 are both consistent with the flow direction of the liquid flow channel 10. Such a setting can not only form multiple branch channels but also will not have a great impact on the pressure of the cooling medium. Preferably, the distance between the contraction notch near the liquid inlet 11 and the strip-shaped protrusion 141 is closer, so that the cross-sectional area of the branch channels near the liquid inlet 11 is smaller, and the pressure drop of the cooling medium decreases more slowly, thereby improving the uniformity of heat dissipation and solving the problem of uneven distribution of the cooling medium.

[0057] Reference Figure 7 And in combination with Figure 3 , water nozzles 5 are connected to both the liquid inlet 11 and the liquid outlet 12 of the liquid cooling plate 1. The adjacent liquid cooling plates 1 are communicated through the water nozzles 5. The water nozzles 5 close to the liquid inlet main pipe 2 and the liquid outlet main pipe 3 are directly connected to the liquid inlet main pipe 2 and the liquid outlet main pipe 3.

[0058] In this embodiment, the water nozzle 5 and the liquid cooling plate 1 are fixedly connected by welding, which is firm and reliable and has good sealing performance.

[0059] In order to enable the liquid cooling plate 1 to further adapt to the expansion and contraction deformation of the battery cell during charging and discharging and prevent the connecting pipelines of the liquid cooling plate 1 from becoming loose or disconnected, the water nozzles 5 of the adjacent liquid cooling plates 1 are connected and communicated through a sleeve 7. The sleeve 7 is sleeved on the adjacent two water nozzles 5, and the two water nozzles 5 can move relative to the axis of the sleeve 7, so that the liquid cooling plate 1 can move within a certain range.

[0060] A gap 70 is left between the two ends of the sleeve 7 and the liquid cooling plate 1. The end faces of the two ends of the sleeve 7 can be movably connected to the corresponding side of the liquid cooling plate 1. When the liquid cooling plate 1 adapts to the expansion deformation of the battery cell, it can move, and the movement of the liquid cooling plate 1 drives the water nozzle 5 to move relative to the sleeve 7.

[0061] Since the cooling medium may still be connected when the water nozzle 5 and the sleeve 7 move relative to each other, in order to ensure the sealing performance of the cooling medium transportation, a sealing ring groove is provided on the outer wall of the water nozzle 5, and a sealing ring 6 is installed in the sealing ring groove. The water nozzle 5 and the sleeve 7 are sealed and connected through the sealing ring 6 to prevent the cooling medium from leaking from the connection. Of course, in order to increase the reliability of the seal, the number of the sealing ring grooves can be two or more, and a sealing ring 6 is installed in each sealing ring groove.

[0062] This embodiment adopts the water nozzle 5 and the sleeve 7 to realize a rigid movable connection, which will neither affect the transportation of the cooling medium nor enable the liquid cooling plate 1 to adapt to the deformation of the battery cell during charging and discharging, and always maintain a high heat exchange efficiency.

[0063] The liquid cooling device of the embodiment of the present invention can adapt to the size change of the battery cell, always fit well with the battery cell, and ensure high cooling efficiency. The liquid cooling device of the embodiment of the present invention has at least the following

[0064] Beneficial effects:

[0065] (1) The liquid cooling plate 1 of this embodiment is formed by connecting two plates, namely the first side plate 14 and the second side plate 15, thus forming a plurality of sealed buffer chambers 13 filled with air inside. When the battery cell expands or contracts, the buffer chambers 13 can adapt to the deformation of the battery cell, so that the liquid cooling plate 1 can always fit well on the outer wall of the battery cell, ensuring a good heat dissipation effect.

[0066] (2) The liquid cooling plate 1 of this embodiment is connected with a water nozzle 5. The water nozzles 5 between adjacent liquid cooling plates 1 are connected and communicated through a sleeve 7. Since a sealing ring 6 is provided between the sleeve 7 and the water nozzle 5, the sleeve 7 and the water nozzle 5 can be hermetically connected, and the cooling medium will not leak during use. In addition, a gap 70 is left between both ends of the sleeve 7 and the liquid cooling plate 1. When the battery cell expands, the liquid cooling plate 1 can drive the water nozzle 5 to move relative to the sleeve 7, further increasing the movable distance of the liquid cooling plate 1 to adapt to the size change of the battery cell.

[0067] (3) In this embodiment, the width of the annular protrusion 142 of the liquid cooling plate 1 is increased near the liquid inlet 11 and the liquid outlet 12, reducing the cross-sectional dimensions of the liquid flow channel 10 for inflow and the liquid flow channel 10 for outflow. At the same time, the liquid flow channel 10 is divided into multiple branch channels by the strip-shaped protrusion 141, thereby reducing the pressure drop at different positions of each liquid cooling plate 1 and different positions within a single liquid cooling plate 1, making the cooling medium as evenly distributed as possible to the liquid cooling plates 1 at different positions, and avoiding excessive temperature differences between battery cells at different positions.

[0068] (4) The liquid cooling plate 1 of this embodiment is also provided with a shrinkage notch. On the one hand, the pressure drop of the cooling medium can be reduced through the shrinkage notch, and on the other hand, the cooling medium forms a turbulent flow locally in the liquid flow channel 10, improving the heat exchange efficiency.

[0069] (5) Heat-conducting colloids 16 are provided in both the strip-shaped groove 143 and the annular groove 144 of the liquid cooling plate 1 of this embodiment, which not only improves the heat exchange efficiency but also prevents the liquid flow channel 10 from being squeezed when the battery cell deforms, thus protecting the liquid cooling plate 1.

[0070] (6) The liquid cooling plate 1 of this embodiment is provided with pads at the edge to protect the liquid cooling plate 1, increasing the contact area and force application points between the liquid cooling plate 1 and the battery cell, and preventing the liquid cooling plate 1 from being suspended.

[0071] An embodiment of the present invention also provides a battery, including a plurality of battery cells and the liquid cooling device described above. The plurality of battery cells are respectively installed in a plurality of accommodating cavities 4 of the liquid cooling device to form a complete battery. For other components and control components of the battery, reference can be made to the settings in the prior art and will not be elaborated here.

[0072] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.

Claims

1. A liquid cooling device, characterized in that, Comprising: The main liquid inlet pipe (2); The main liquid outlet pipe (3); A plurality of liquid cooling plates (1), the plurality of liquid cooling plates (1) are arranged at intervals and side by side, and an accommodation cavity (4) for placing battery cells is formed between two adjacent liquid cooling plates (1); a liquid flow channel (10) is provided inside the liquid cooling plate (1), and two ends of the liquid flow channel (10) are respectively a liquid inlet (11) and a liquid outlet (12), the liquid inlet (11) is communicated with the main liquid inlet pipe (2), and the liquid outlet (12) is communicated with the main liquid outlet pipe (3); a plurality of buffer chambers (13) are further provided on the liquid cooling plate (1).

2. The liquid cooling device according to claim 1, characterized in that, The liquid cooling plate (1) includes a first side plate (14) and a second side plate (15), and the first side plate (14) and the second side plate (15) are joined face to face; The first side plate (14) has a strip-shaped protrusion (141) and an annular protrusion (142), and both the strip-shaped protrusion (141) and the annular protrusion (142) are joined to the second side plate (15); the strip-shaped protrusion (141) is used for dividing the liquid flow channel (10) into a plurality of branch channels, and the annular protrusion (142) and the second side plate (15) are joined to form the buffer chamber (13).

3. The liquid cooling device according to claim 2, characterized in that, The back side of the strip-shaped protrusion (141) is a strip-shaped groove (143), and the back side of the annular protrusion (142) is an annular groove (144), and heat-conducting colloids (16) are filled in both the strip-shaped groove (143) and the annular groove (144).

4. The liquid cooling device according to claim 2, characterized in that, The width of the annular protrusion (142) increases near the liquid inlet (11) and the liquid outlet (12) for reducing the pressure drop of the liquid flow channel (10).

5. The liquid cooling device according to claim 2, characterized in that, The first side plate (14) and the second side plate (15) are connected by welding, and a spacer block is provided at the welding joint, and the spacer block is arranged along the edge of the liquid cooling plate (1) so that the thickness of the edge of the liquid cooling plate (1) is the same as the thickness of the middle part of the liquid cooling plate (1).

6. The liquid cooling device according to claim 1, wherein, A plurality of shrinkage notches are arranged at intervals in the length direction of the liquid cooling plate (1) to change the local flow direction and the cross-sectional size of the liquid flow channel (10).

7. The liquid cooling device according to claim 1, wherein Water nozzles (5) are connected to both the liquid inlet (11) and the liquid outlet (12), and the water nozzle (5) on the liquid inlet (11) side is movably connected and communicated with the main liquid inlet pipe (2); and / or, the water nozzle (5) on the liquid outlet (12) side is movably connected and communicated with the main liquid outlet pipe (3).

8. The liquid cooling device according to claim 7, characterized in that The liquid cooling device further includes a sleeve (7), the sleeve (7) is sleeved on the water nozzle (5), and the sleeve (7) is used for communicating two water nozzles (5) on adjacent liquid cooling plates (1); A sealing ring groove is provided on the outer wall of the water nozzle (5), a sealing ring (6) is installed in the sealing ring groove, and the water nozzle (5) and the sleeve (7) are sealed and connected through the sealing ring (6).

9. The liquid cooling device according to any one of claims 1 to 8, characterized in that, The liquid flow channel (10) includes a first-side liquid flow channel (101) and a second-side liquid flow channel (102). The first-side liquid flow channel (101) and the second-side liquid flow channel (102) are respectively located on two side portions of the liquid cooling plate (1), and the liquid inlet (11) and the liquid outlet (12) are both located in the middle of the first-side liquid flow channel (101) and the second-side liquid flow channel (102).

10. A battery, characterized in that, Comprising: A plurality of battery cells and the liquid cooling device according to any one of claims 1 to 9, wherein the plurality of battery cells are respectively installed in the plurality of accommodation cavities (4) of the liquid cooling device.

Images