Heat dissipation device, battery pack and energy storage device

Abstract

The application discloses a heat dissipation device, a battery pack and an energy storage device. The heat dissipation device comprises a liquid cooling plate, the liquid cooling plate comprises a liquid inlet, a liquid outlet and a cooling channel communicated between the liquid inlet and the liquid outlet, and a uniform temperature plate is cross-connected with the liquid cooling plate. The heat dissipation device can not only dissipate heat for the battery cell in contact with the liquid cooling plate, but also dissipate heat for the uniform temperature plate, so that the uniform temperature plate further dissipates heat for the battery cell, the heat dissipation area of the battery cell is ensured, and the cooling performance is improved.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to a heat dissipation device, a battery pack, and an energy storage device. Background Technology

[0002] As the integration level of energy storage modules increases, the number of cells in a single module gradually increases. However, with the continuous increase in the number of cells, heat dissipation of the energy storage module becomes increasingly difficult, resulting in a large temperature difference between the cells and affecting their lifespan. Summary of the Invention

[0003] The present invention provides a heat dissipation device, a battery pack, and an energy storage device.

[0004] The heat dissipation device according to the embodiments of the present invention includes: a liquid cooling plate, the liquid cooling plate including a liquid inlet, a liquid outlet and a cooling channel connecting the liquid inlet and the liquid outlet;

[0005] The temperature distribution plate is cross-connected with the liquid cooling plate.

[0006] In some embodiments, the liquid cooling plate is vertically connected to the heat exchanger.

[0007] In some embodiments, the heat spreader is a gravity heat pipe.

[0008] In some embodiments, the liquid cooling plate has a first notch, the heat spreader has a second notch, and the liquid cooling plate and the heat spreader are connected by insertion through the first notch and the second notch.

[0009] In some embodiments, the liquid cooling plate is axisymmetric, and the first notch is located on the axis of symmetry of the liquid cooling plate.

[0010] In some embodiments, the cooling channels on the axis of symmetry of the liquid cooling plate are located on the edge side of the liquid cooling plate.

[0011] The battery pack of this invention includes a plurality of battery modules, an upper pressure plate, a base plate, and a heat dissipation device according to any of the above embodiments. The base plate is located at the lower end of the plurality of battery modules, the upper pressure plate is located at the upper end of the plurality of battery modules, and the heat dissipation device is installed between the plurality of battery modules.

[0012] In some embodiments, the battery module includes a module body and a connection end, the connection end being located at the top of the module body, the bottom of the module body abutting against the heat spreader, and the side end of the module body abutting against the liquid cooling plate.

[0013] In some embodiments, the battery pack includes a support pad located between the plurality of battery modules and the base plate.

[0014] The energy storage device according to the embodiments of the present invention includes the battery pack described in any of the above embodiments.

[0015] The heat dissipation device, battery pack, and energy storage device of the present invention can not only dissipate heat from the battery cell in contact with the liquid cooling plate, but also dissipate heat from the heat spreader, so that the heat spreader can further dissipate heat from the battery cell, ensuring the heat dissipation area of ​​the battery cell and thus improving the cooling performance.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the heat dissipation device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the liquid cooling plate according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the heat spreader according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the battery module according to an embodiment of the present invention;

[0022] Figure 5 This is a partially exploded schematic diagram of the battery module according to an embodiment of the present invention.

[0023] Key features and reference numerals:

[0024] Heat dissipation device 100, liquid cooling plate 10, liquid inlet 11, liquid outlet 12, cooling channel 13, first notch 14, heat spreader 20, second notch 21, battery pack 1000, battery module 200, module body 210, connecting end 220, upper pressure plate 300, bottom plate 400, support pad 500. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention.

[0026] In embodiments of the present invention, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The following disclosure provides many different embodiments or examples of various structures for implementing embodiments of the present invention. To simplify the disclosure of embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Reference numerals and / or reference letters may be repeated in different examples of embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Furthermore, embodiments of the present invention provide examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0028] Please see Figures 1 to 3 The heat dissipation device 100 of this embodiment includes a liquid cooling plate 10 and a heat spreader 20. The liquid cooling plate 10 includes a liquid inlet 11, a liquid outlet 12, and a cooling channel 13 connecting the liquid inlet 11 and the liquid outlet 12. The heat spreader 20 is cross-connected to the liquid cooling plate 10.

[0029] The heat dissipation device 100 of the present invention can not only dissipate heat from the battery cell in contact with the liquid cooling plate 10, but also dissipate heat from the heat spreader 20, so that the heat spreader 20 can further dissipate heat from the battery cell, ensuring the heat dissipation area of ​​the battery cell and thus improving the cooling performance.

[0030] Specifically, in existing technologies, liquid cooling plates are typically used to dissipate heat from the battery cells. However, liquid cooling plates are only effective at dissipating heat at the points of contact with the liquid cooling plate, and using a large number of liquid cooling plates increases costs and makes operation relatively inconvenient. Therefore, the heat dissipation device 100 of this invention includes a heat spreader 20 that is cross-connected to the liquid cooling plate 10. This allows the heat spreader 20 to extend the cooling effect of the liquid cooling plate 10 to the battery cells in contact with it, thereby enhancing the cooling effect of the liquid cooling plate 10 at a lower cost and effectively cooling the battery cells.

[0031] The liquid cooling plate 10 can have many shapes, such as rectangular, square, trapezoidal, etc., and no specific limitation is made here. The liquid cooling plate 10 can be supported by a metal with good thermal conductivity, or it can be made of other materials with good thermal conductivity, and no specific limitation is made here.

[0032] The inlet 11 is used to introduce coolant into the liquid cooling plate 10. The coolant flows through the cooling channel 13, absorbs heat in the cooling channel 13, and is finally discharged from the outlet 12, thus absorbing heat near the liquid cooling plate 10. The liquid cooling plate 10 may include one inlet 11, two inlets 11, or multiple inlets 11, depending on factors such as the size of the liquid cooling plate 10, the arrangement of the cooling channel 13, and the heat absorption efficiency. No specific limitations are made here.

[0033] The liquid cooling plate 10 may include one liquid outlet 12, two liquid outlets 12, or multiple liquid outlets 12, which can be adjusted according to factors such as the size of the liquid cooling plate 10, the arrangement of the cooling channels 13, and the heat absorption efficiency.

[0034] In one embodiment, the liquid cooling plate 10 includes an outlet 12 and an inlet 11, and the cooling channel 13 connects the inlet 11 and the outlet 12. This results in a simpler structure and easier use. In another embodiment, the liquid cooling plate 10 includes an inlet 11 and multiple outlets 12, and the cooling channel 13 includes multiple sub-channels. Each sub-channel connects the inlet 11 to an outlet 12, and the multiple sub-channels correspond one-to-one with the multiple outlets 12. Thus, the multiple sub-channels together constitute the cooling channel 13, allowing the coolant to be discharged relatively quickly from the outlets 12 after heating, avoiding an excessively long cooling channel 13 and reducing the probability of the coolant failing to discharge from the outlets 12 after absorbing a certain amount of heat due to poor heat absorption. In another embodiment, the liquid cooling plate 10 includes multiple liquid inlets 11 and multiple liquid outlets 12. These inlets and outlets can be one-to-one, multiple inlets 11 can correspond to one outlet 12, or one inlet 11 can correspond to multiple outlets 12. The cooling channel 13 includes several connecting sub-channels that connect the corresponding inlets 11 and outlets 12. Thus, when the liquid cooling plate 10 has a large area, the number and combination of the inlets 11, outlets 12, and cooling channels 13 can be adjusted as needed, avoiding the problem of poor cooling effect at the end of the cooling channel 13 due to its excessive length.

[0035] The liquid inlet 11 can be located at the edge of the liquid cooling plate 10 or at the center of the liquid cooling plate 10. The location of the liquid inlet 11 can be adjusted according to the positional relationship between the liquid cooling plate 10 and the battery cell, the structure of the liquid cooling plate 10, the size of the liquid cooling plate 10, etc. The liquid outlet 12 can be located at the edge of the liquid cooling plate 10 or at the center of the liquid cooling plate 10. The location of the liquid outlet 12 can be adjusted according to the positional relationship between the liquid cooling plate 10 and the battery cell, the structure of the liquid cooling plate 10, the size of the liquid cooling plate 10, etc. In some embodiments, the shape of the liquid cooling plate 10 matches the battery cell, and the liquid cooling plate 10 is clamped between the battery cells. The edge of the liquid cooling plate 10 is provided with a liquid inlet protrusion, and the liquid inlet 11 is provided on the liquid inlet protrusion. In this way, it is easy to expose the liquid inlet 11 and facilitate liquid inlet through the liquid inlet 11. The edge of the liquid cooling plate 10 may also be provided with a liquid outlet protrusion, and the liquid outlet 12 is provided on the liquid outlet protrusion. In this way, it is easy to expose the liquid outlet 12 and facilitate liquid outlet through the liquid outlet 12.

[0036] There are many ways to arrange the cooling channels 13. The cooling channels 13 can be evenly arranged on the liquid cooling plate 10, or they can be arranged in some positions and not arranged in others, depending on the cooling needs. The arrangement of the cooling channels 13 can be adjusted according to factors such as the matching position of the battery cell and the liquid cooling plate 10 and the position that needs to be cooled. No specific restrictions are imposed here.

[0037] The heat spreader 20 and the liquid cooling plate 10 are cross-connected, so that the liquid cooling plate 10 can carry away some of the heat on the heat spreader 20. The heat spreader 20 distributes the cooling effect of the liquid cooling plate 10 evenly to the battery cell in contact with the heat spreader 20, effectively enhancing the cooling effect of the liquid cooling plate 10.

[0038] It is worth noting that the vapor chamber 20 and the liquid cooling plate 10 are cross-connected. This can be understood as both opposite sides of the vapor chamber 20 being connected to the liquid cooling plate 10; that is, it is not only one side of the vapor chamber 20 that is connected to the liquid cooling plate 10. In this way, both opposite sides of the vapor chamber 20 can be cooled through the liquid cooling plate 10, achieving a better cooling effect.

[0039] The liquid cooling plate 10 can be perpendicular to the heat spreader 20, or the liquid cooling plate 10 can be at a certain angle to the heat spreader 20. The relative positional relationship between the liquid cooling plate 10 and the heat spreader 20 can be adjusted according to factors such as the shape of the battery cell and the installation method of the battery cell, and no specific restrictions are imposed here.

[0040] There are many ways to cross-connect the liquid cooling plate 10 and the heat spreader 20. The liquid cooling plate 10 can be connected to the heat spreader 20 by insertion, or by welding, bonding, interference fit, etc. The liquid cooling plate 10 can also be directly integrally formed with the heat spreader 20. No specific restrictions are made here.

[0041] It should be noted that the heat dissipation device 100 may include one liquid cooling plate 10, or it may include multiple liquid cooling plates 10. The heat dissipation device 100 may include one heat spreader 20, or it may include multiple heat spreaders 20. The liquid cooling plate 10 may correspond one-to-one with the heat spreader 20, or one liquid cooling plate 10 may correspond to multiple heat spreaders 20, or multiple liquid cooling plates 10 may correspond to one heat spreader 20. The correspondence between the liquid cooling plate 10 and the heat spreader 20 can be adjusted according to factors such as production costs, cooling requirements, and cell installation methods, and no specific restrictions are imposed here.

[0042] In some implementations, please refer to Figure 1 The liquid cooling plate 10 is vertically connected to the heat exchange plate 20.

[0043] Thus, the battery cell typically has right-angled edges, and the liquid cooling plate 10 and the heat spreader 20 are perpendicular to each other, which can better fit the battery cell and ensure the contact area between the battery cell and the liquid cooling plate 10 and / or the heat spreader 20, thereby ensuring the cooling effect of the liquid cooling plate 10 and the heat spreader 20.

[0044] Specifically, the liquid cooling plate 10 is vertically connected to the heat spreader 20. When a battery cell with a right angle is installed on the liquid cooling plate 10, it can simultaneously adhere to the heat spreader 20, thereby ensuring that two sides of the battery cell can adhere to both the liquid cooling plate 10 and the heat spreader 20, thus ensuring the contact area between the battery cell and the heat dissipation device 100.

[0045] It is worth noting that due to production and installation errors, the angle between the liquid cooling plate 10 and the heat spreader 20 can be 90 degrees, or it can be about 90 degrees.

[0046] In some implementations, the heat spreader 20 is a gravity heat pipe.

[0047] In this way, the liquid inside the gravity heat pipe can circulate, which conveniently maintains the uniform temperature of the heat spreader 20.

[0048] Specifically, the gravity heat pipe needs to be installed vertically, so the heat spreader 20 is installed vertically. In some embodiments, the liquid cooling plate 10 is perpendicular to the heat spreader 20, so the liquid cooling plate 10 can be installed horizontally.

[0049] It is worth noting that the lower end of the gravity heat pipe absorbs heat and the upper end releases heat. Therefore, the liquid cooling plate 10 can be placed above the gravity heat pipe to enhance the heat absorption effect of the liquid cooling plate 10 on the heat spreader 20.

[0050] In some implementations, please refer to Figure 1The liquid cooling plate 10 has a first notch 14, and the heat spreader 20 has a second notch 21. The liquid cooling plate 10 and the heat spreader 20 are connected by insertion through the first notch 14 and the second notch 21.

[0051] Thus, the first notch 14 and the second notch 21 work together to achieve a cross connection between the liquid cooling plate 10 and the heat spreader 20.

[0052] Specifically, the first notch 14 can be located in the center of the liquid cooling plate 10, or it can be offset to one side of the liquid cooling plate 10. The position of the first notch 14 can be adjusted according to factors such as the connection position between the liquid cooling plate 10 and the heat spreader 20, and the shape of the liquid cooling plate 10. No specific limitation is made here.

[0053] The second notch 21 can be located in the center of the heat spreader 20, or it can be offset to one side of the heat spreader 20. The position of the second notch 21 can be adjusted according to factors such as the connection position between the heat spreader 20 and the liquid cooling plate 10, and the shape of the heat spreader 20. No specific restrictions are imposed here.

[0054] The length of the first notch 14 can be longer than the length of the second notch 21, or the length of the first notch 14 can be equal to the length of the second notch 21, or the length of the first notch 14 can be shorter than the length of the second notch 21. For ease of description, the direction in which the liquid cooling plate 10 extends along the first notch 14 is defined as the length direction of the liquid cooling plate 10, and the direction in which the heat spreader 20 extends along the second notch 21 is defined as the length direction of the heat spreader 20. In some embodiments, the length of the liquid cooling plate 10 is equal to the length of the heat spreader 20, and the length of the first notch 14 plus the length of the second notch 21 equals the length of the liquid cooling plate 10, that is, the length of the first notch 14 plus the length of the second notch 21 equals the length of the heat spreader 20. In this way, the liquid cooling plate 10 and the heat spreader 20 can fit together more closely, thereby achieving more efficient cooperation. Specifically, if the length of the heat spreader 20 is longer than that of the liquid cooling plate 10, or if the length of the first notch 14 plus the second notch 21 is less than that of the liquid cooling plate 10, then some parts of the heat spreader 20 will not be able to contact the liquid cooling plate 10, resulting in poor cooling effect. If the length of the heat spreader 20 is shorter than that of the liquid cooling plate 10, then the cooling effect of the liquid cooling plate 10 will be wasted to some extent, resulting in low cooling efficiency.

[0055] In some implementations, please refer to Figure 1 The liquid cooling plate 10 is axially symmetrical, and the first notch 14 is located on the axis of symmetry of the liquid cooling plate 10.

[0056] This not only facilitates the production of the liquid cooling plate 10, but also allows for the symmetrical arrangement of battery cells on the liquid cooling plate 10, thereby increasing the integration rate of the battery pack 1000.

[0057] For further details, please refer to Figure 1 and Figure 2 The cooling channel 13 on the axis of symmetry of the liquid cooling plate 10 is located on the edge side of the liquid cooling plate 10.

[0058] In this way, the first notch 14 can be made deeper, which facilitates the cooperation between the liquid cooling plate 10 and the heat spreader 20.

[0059] Specifically, the first notch 14 should be spaced apart from the cooling channel 13 to avoid the first notch 14 affecting the flow of coolant in the cooling channel 13. Therefore, the cooling channel 13 is located at one end of the liquid cooling plate 10, so that the first notch 14 can be opened close to the cooling channel 13. This not only does not affect the flow of the cooling channel 13, but also makes it convenient for the heat spreader 20 to cooperate with the liquid cooling plate 10 through the first notch 14.

[0060] This invention also discloses a battery pack 1000, please refer to [link / reference]. Figure 4 and Figure 5 The battery pack 1000 includes multiple battery modules 200, an upper pressure plate 300, a base plate 400, and a heat dissipation device 100 according to any of the above embodiments. The base plate 400 is located at the lower end of the multiple battery modules 200, the upper pressure plate 300 is located at the upper end of the multiple battery modules 200, and the heat dissipation device 100 is installed between the multiple battery modules 200.

[0061] In the battery pack 1000 of this invention, the liquid cooling plate 10 can not only dissipate heat from the battery cells in contact with the liquid cooling plate 10, but also dissipate heat from the heat spreader 20, so that the heat spreader 20 can further dissipate heat from the battery cells, ensuring the heat dissipation area of ​​the battery cells and thus improving the cooling performance.

[0062] Specifically, the battery pack 1000 may include 2, 3, 4, 5, or 6 battery modules 200, without any specific limitation. Specifically, if the battery pack 1000 includes two battery modules 200, the two battery modules 200 can be mounted on one side of the liquid cooling plate 10 and clamp the heat spreader 20; alternatively, the two battery modules 200 can be mounted on one side of the heat spreader 20 and clamp the liquid cooling plate 10. If the battery pack 1000 includes four battery modules 200, the four battery modules 200 can clamp the heat spreader 20 and the liquid cooling plate 10 in pairs.

[0063] In some implementations, please refer to Figure 4 and Figure 5 The battery module 200 includes a module body 210 and a connection end 220. The connection end 220 is located on the top of the module body 210, the bottom of the module body 210 abuts against the heat spreader 20, and the side of the module body 210 abuts against the liquid cooling plate 10.

[0064] Thus, the side of the module body 210 abuts against the liquid cooling plate 10, and the bottom of the module body 210 abuts against the heat spreader 20, so that the connecting end 220 located at the top of the module body 210 can be spaced apart from the liquid cooling plate 10 and the heat spreader 20, which facilitates the electrical connection of the battery module 200. In addition, the side and bottom of the module body 210 are flatter than the top with the connecting end 220, which makes it easier to fit with the liquid cooling plate 10 and the heat spreader 20, achieving a better heat dissipation effect. It also makes the battery pack 1000 more regular and convenient for stacking multiple battery modules 200.

[0065] In some implementations, please refer to Figure 4 Multiple battery modules 200 include at least four battery modules 200, and the liquid cooling plate 10 and the heat spreader 20 are used to form four installation areas, with at least one battery module 200 in each installation area.

[0066] This improves the integration rate of the 1000 battery pack and increases space utilization.

[0067] Specifically, each installation area can have one battery module 200, two battery modules 200, or other numbers of battery modules 200. It is worth noting that, to facilitate the placement of the battery pack 1000, the number of battery modules 200 installed in two vertically symmetrical installation areas should be the same, so that the two vertically symmetrical installation areas have the same height.

[0068] Specifically, in one implementation method, please refer to Figure 4 The liquid cooling plate 10 extends horizontally, and the heat spreader 20 extends vertically, together dividing and forming four installation areas distributed in a 2x2 rectangular array. Each installation area is provided with a battery module 200. The side end of the module body 210 of the battery module 200 in each installation area abuts against the liquid cooling plate 10, while the top of the module body 210 abuts against the heat spreader 20. That is, the battery modules 100 in each installation area are in a side-lying state, and the battery modules 100 in two adjacent installation areas jointly clamp the liquid cooling plate 10 or the heat spreader 20.

[0069] In some embodiments, the battery pack 1000 includes a support pad 500 located between the plurality of battery modules 200 and the base plate 400.

[0070] Thus, the support pad 500 can compensate for the production errors of the battery module 200 or the base plate 400, maintain the relative positional relationship between the battery module 200 and the base plate 400, protect the battery module 200, and also serve as insulation.

[0071] Specifically, due to production errors and costs, the battery module 200 may not fit perfectly against the base plate 400. In this case, a support pad 500 with some elasticity can be used. The support pad 500 is sandwiched between the battery module 200 and the base plate 400, allowing for a tighter fit. Furthermore, the support pad 500 can be made of insulating material, thus preventing leakage of current from the battery module 200 through the base plate 400 and ensuring the insulation of the battery pack 1000.

[0072] The support pad 500 can have various shapes, such as rectangular, circular, or trapezoidal. The shape of the support pad 500 can be adjusted based on factors such as the shape of the battery module 200 and the base plate 400; no specific limitations are imposed here. The battery pack 1000 may include 1, 2, 3, 4, 5, 10, or 20 support pads 500. The specific number of support pads 500 can be adjusted based on factors such as the size of the support pads 500, the size of the battery module 200, and support requirements; no specific limitations are imposed here.

[0073] In some embodiments, thermally conductive adhesive is provided between the multiple battery modules 200 and the heat dissipation device 100.

[0074] Since air has poor thermal conductivity, thermally conductive adhesive is placed between the multiple battery modules 200 and the heat dissipation device 100. This not only ensures the connection between the multiple battery modules 200 and the heat dissipation device 100, but also enhances the heat exchange efficiency between the multiple battery modules 200 and the heat dissipation device 100.

[0075] In some embodiments, a thermal pad is provided between the multiple battery modules 200 and the heat dissipation device 100.

[0076] Since air has poor thermal conductivity, placing thermal pads between the multiple battery modules 200 and the heat dissipation device 100 can not only ensure the connection between the multiple battery modules 200 and the heat dissipation device 100, but also enhance the heat exchange efficiency between the multiple battery modules 200 and the heat dissipation device 100.

[0077] In some embodiments, the multiple battery modules 200 include module end plates with through holes extending in a vertical direction, upper pressure plate 300 with a first through hole, bottom plate 400 with a second through hole, and battery pack 1000 also includes bolts and nuts, the bolts passing through the first through hole, the through hole and the second through hole and engaging with the nuts.

[0078] In this way, multiple battery modules 200 are connected to the upper pressure plate 300 and the base plate 400.

[0079] Specifically, the battery pack 1000 may also include a support pad 500. During the process of fixing multiple battery modules 200 to the base plate 400, the support pad 500 undergoes elastic deformation to protect the battery modules 200 from hard collisions with the base plate 400 and avoid wear between the battery modules 200 and the base plate 400. In addition, after the support pad 500 undergoes elastic deformation, it fits more closely to the multiple battery modules 200 and the base plate 400, further ensuring the relative positional relationship between the multiple battery modules 200 and the base plate 400.

[0080] The present invention also discloses an energy storage device, which includes the battery pack 1000 of any of the above embodiments.

[0081] In the energy storage device of this invention, the liquid cooling plate 10 can not only dissipate heat from the battery cell in contact with the liquid cooling plate 10, but also dissipate heat from the heat spreader 20, so that the heat spreader 20 can further dissipate heat from the battery cell, ensuring the heat dissipation area of ​​the battery cell and thus improving the cooling performance.

[0082] The energy storage device may include one or more battery packs 1000. That is, in some embodiments, the number of battery packs 1000 in the energy storage device may be one, two, three, four, or more than four, and there is no limitation here. In one embodiment, the number of battery packs 1000 in the energy storage device may be four, and the four battery packs 1000 are arranged in a vertical row. The battery packs 1000 may be connected in series, in parallel, or in a series-parallel connection, and there is no limitation here. The energy storage device formed by such multiple battery packs 1000 has a stronger energy storage effect and can meet the user's needs. The energy storage device may be manufactured in the form of a home energy storage cabinet or a small container.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A heat dissipation device, characterized in that, include: A liquid cooling plate, the liquid cooling plate including a liquid inlet, a liquid outlet and a cooling channel connecting the liquid inlet and the liquid outlet; A heat spreader is cross-connected to the liquid cooling plate; The liquid cooling plate has a first notch, the heat spreader has a second notch, and the liquid cooling plate and the heat spreader are connected by insertion through the first notch and the second notch; The liquid cooling plate is axially symmetrical, and the first notch is located on the axis of symmetry of the liquid cooling plate; The cooling channel on the axis of symmetry of the liquid cooling plate is located on the edge side of the liquid cooling plate; The temperature distribution plate is axially symmetrical, and the second notch is located on the axis of symmetry of the temperature distribution plate; The length of the liquid cooling plate is equal to the length of the heat spreader, and the length of the first notch plus the length of the second notch equals the length of the liquid cooling plate.

2. The heat dissipation device according to claim 1, characterized in that, The liquid cooling plate is vertically connected to the heat spreader.

3. The heat dissipation device according to claim 1, characterized in that, The heat spreader is a gravity heat pipe.

4. A battery pack, characterized in that, The device includes multiple battery modules, an upper pressure plate, a base plate, and a heat dissipation device as described in any one of claims 1-3. The base plate is located at the lower end of the multiple battery modules, the upper pressure plate is located at the upper end of the multiple battery modules, and the heat dissipation device is installed between the multiple battery modules.

5. The battery pack according to claim 4, characterized in that, The battery module includes a module body and a connection end. The connection end is located at the top of the module body, the bottom of the module body abuts against the heat spreader, and the side of the module body abuts against the liquid cooling plate.

6. The battery pack according to claim 4, characterized in that, The battery pack includes a support pad located between the plurality of battery modules and the base plate.

7. An energy storage device, characterized in that, Includes the battery pack as described in any one of claims 4-6.

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