Battery pack and energy storage system with multiple cooling methods

Abstract

The present application relates to the technical field of battery packs, and in particular to a battery pack and energy storage system with multiple cooling methods, including a main shell, a battery module and a liquid cooling plate, wherein the battery module is arranged in the main shell, and an installation space is formed between the battery module and the main shell, and the installation space is used to install a liquid cooling plate or a support plate without liquid cooling function; a mounting area is formed on one side of the main shell, and the mounting area is used to install a fan, and the main shell is also formed with an air guide hole, so that the outside of the main shell, the fan and the inside of the main shell are connected; an exhaust port connected to the inside is formed on the other side of the main shell; the mounting area and the mounting space are respectively located on different sides of the battery module. This battery pack can be compatible with different heat dissipation structures according to actual conditions, and can thus realize air cooling, liquid cooling or a combination of air cooling and liquid cooling, with strong selectivity.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a battery pack and energy storage system with multiple cooling methods. Background Art

[0002] At present, higher requirements are put forward for the heat dissipation design of battery packs. A reasonable heat dissipation structure is conducive to improving the life of the battery pack. However, the current battery pack is designed with a fixed cooling mode, that is, a fixed air cooling mode, a fixed liquid cooling mode, or a fixed liquid cooling combined with air cooling mode. It is not compatible with different heat dissipation structures, resulting in poor cooling effect and high structural and process costs. Utility Model Content

[0003] The purpose of the present application is to provide a battery pack and energy storage system with multiple cooling methods, which to a certain extent solves the technical problem in the prior art that the battery pack is not compatible with different heat dissipation structures.

[0004] The present application provides a battery pack with multiple cooling methods, comprising: a main shell and a battery module; wherein the battery module is arranged in the main shell, and an installation space is formed between the battery module and the main shell, and the installation space is used to install a liquid cooling plate or a support plate without a liquid cooling function;

[0005] An installation area is formed on one side of the main shell, and the installation area is used to install a fan. The main shell is also formed with an air guide hole so that the outside of the main shell, the fan and the inside of the main shell are connected; an exhaust port connected to the inside is formed on the other opposite side of the main shell; the installation area and the installation space are respectively located on different sides of the battery module.

[0006] In the above technical solution, further, the battery pack with multiple cooling methods also includes a heat sink, the battery module includes a battery cell assembly, and the battery cell assembly includes a plurality of battery cells arranged sequentially along a preset direction, and the heat sink is interspersed between the battery cells;

[0007] The heat sink is formed with an air duct and an air inlet and an air outlet respectively connected to the air duct, and the installation area is formed on the side of the main shell close to the air inlet, and the air inlet is connected to the fan.

[0008] In any of the above technical solutions, further, the battery module also includes an intermediate fixing plate and an end plate; wherein, along the preset direction, the end plates are arranged at both ends of the battery cell assembly, and the end plates are connected to the main shell; along the direction perpendicular to the preset direction, the intermediate fixing plate is arranged on one side of the battery cell assembly, and the intermediate fixing plate is connected to the main shell; the end plate is connected to the intermediate fixing plate.

[0009] In any of the above technical solutions, further, the intermediate fixed plate is formed with an air guide port, and along a direction perpendicular to the preset direction, the fan, the air guide port, the air inlet, the air duct, the air outlet and the exhaust port are arranged in sequence and connected.

[0010] In any of the above technical solutions, further, the air duct extends along a direction perpendicular to the preset direction.

[0011] In any of the above technical solutions, further, there are multiple air ducts, which are sequentially spaced along the height direction of the heat sink, and any of the air ducts is equipped with one air inlet and one air outlet.

[0012] In any of the above technical solutions, further, the battery cell assembly is connected to the end plate and the intermediate fixing plate respectively by gluing.

[0013] In any of the above technical solutions, further, the end plate and the side of the intermediate fixing plate close to the battery core are both provided with an insulating coating.

[0014] In any of the above technical solutions, further, the battery module also includes an upper cover and a busbar; wherein the upper cover is arranged on the top side of the intermediate fixing plate, the end plate and the battery cell assembly, and the upper cover is connected to the intermediate fixing plate and the end plate; a tab cluster is formed on the top side of the battery cell assembly along its height direction, and the busbar is arranged between the upper cover and the battery cell assembly, and is used for connecting the tab cluster;

[0015] The installation area and the air guide hole are formed on the top side of the main shell, the exhaust port is formed on the side of the main shell close to the intermediate fixing plate or on the side away from the intermediate fixing plate, the upper cover and the busbar are both formed with air guide ports, and when the exhaust port is formed on the side of the main shell close to the intermediate fixing plate, the intermediate fixing plate is also formed with an air guide port.

[0016] In any of the above technical solutions, further, there are multiple heat dissipation plates, which are sequentially spaced apart along the preset direction.

[0017] In any of the above technical solutions, further, the battery core is connected to the heat sink by gluing.

[0018] In any of the above technical solutions, further, the heat sink is made of aluminum.

[0019] In any of the above technical solutions, further, the main housing includes a front panel, a back panel, a side panel and an upper side cover; wherein the front panel is L-shaped, the battery module is arranged on the bottom support portion of the L-shaped front panel, and the side support portion of the front panel and the back panel are respectively arranged on the front side and the rear side of the battery module;

[0020] The two side plates are respectively arranged on the other two opposite sides of the battery module in the circumferential direction, and any of the side plates is respectively connected to the front plate and the back plate; the upper side cover is arranged on the top sides of the front plate, the back plate and the side plates and is respectively connected;

[0021] The side support portion of the front panel, the back plate and one of the upper side covers form the installation area and the air guide hole, and the installation space is formed between the bottom support portion of the front panel, the back plate and the other of the upper side covers and the battery module.

[0022] In any of the above technical solutions, further, the installation area is formed on the outer wall of the main shell, the air guide hole is formed and penetrates the inner wall of the main shell, and the installation area is connected with the interior of the main shell through the air guide hole.

[0023] In any of the above technical solutions, further, along the height direction of the main shell, the installation space is formed between the battery module and the bottom side of the main shell; the installation area and the air guide hole are formed on one side of the circumference of the main shell, and the exhaust port is formed on the other opposite side of the circumference of the main shell.

[0024] In any of the above technical solutions, further, the fan is detachably connected to the main housing.

[0025] In any of the above technical solutions, further, the battery pack with multiple cooling methods also includes a battery management circuit board, and the battery management circuit board is arranged between the main shell and the battery module, and part of the structure of the liquid cooling plate extends along the surface of the battery management circuit board.

[0026] In any of the above technical solutions, further, when the installation area is vacant, the battery pack with multiple cooling methods also includes a sealing plate, and the sealing plate covers the installation area and the air guide hole.

[0027] In any of the above technical solutions, further, the installation space is installed with the liquid cooling plate, and the installation area is installed with the fan; or, the installation space is installed with the support plate, and the installation area is installed with the fan; or, the installation space is installed with the liquid cooling plate, and the installation area is vacant.

[0028] The present application also provides an energy storage system, comprising a support frame, an outer cover plate, and a battery pack with multiple cooling methods according to any of the above technical solutions, wherein the battery pack with multiple cooling methods is arranged in the support frame; the number of the battery packs with multiple cooling methods is multiple, and they are arranged sequentially along the height direction of the support frame; the outer cover plate is fixed to the outside of the support frame. Therefore, all the beneficial technical effects of the battery pack with multiple cooling methods are not repeated here.

[0029] Compared with the prior art, the beneficial effects of this application are:

[0030] The novel battery pack with multiple cooling methods provided in the present application can be compatible with different heat dissipation structures according to actual conditions, and can further realize air cooling, liquid cooling or a combination of air cooling and liquid cooling. It has strong selectivity and can not only realize the heat dissipation of the battery pack, make the battery pack temperature more uniform, and improve the performance and service life of the battery pack, but also save energy and reduce costs.

[0031] In addition, in the present application, the battery module is directly assembled in the main shell, eliminating the shell insertion process after the battery module is assembled outside the shell in the prior art, simplifying the grouping process and making it easy to implement, improving assembly efficiency, reducing structural parts, and further reducing battery pack costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of the structure of a battery pack with multiple cooling methods provided in an embodiment of the present application;

[0034] Figure 2 Another schematic diagram of the structure of a battery pack with multiple cooling methods provided in an embodiment of the present application;

[0035] Figure 3An exploded diagram of a battery pack with multiple cooling methods provided in an embodiment of the present application;

[0036] Figure 4 An exploded view of the main housing provided in an embodiment of the present application;

[0037] Figure 5 An exploded view of a battery module provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the structure of a battery pack with multiple cooling methods provided in an embodiment of the present application after opening;

[0040] Figure 8 A schematic diagram of the structure of a battery pack with multiple cooling methods provided in an embodiment of the present application after opening;

[0041] Fig. 9 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0042] Fig.10 Another structural schematic diagram of a battery module provided in an embodiment of the present application;

[0043] Fig.11 A schematic diagram of the structure of the front panel provided in an embodiment of the present application;

[0044] Fig.12 A schematic diagram of the structure of a liquid cooling plate provided in an embodiment of the present application;

[0045] Fig.13 Another schematic diagram of the structure of the liquid cooling plate provided in the embodiment of the present application;

[0046] Fig.14 for Fig.13 Cross-sectional view along section AA;

[0047] Fig.15 A schematic diagram of the structure of the energy storage system provided in an embodiment of the present application.

[0048] Reference numerals:

[0049] 1-main shell, 11-front panel, 111-side support part, 112-bottom support part, 113-extension plate, 12-back plate, 13-side plate, 14-upper side cover, 15-air guide hole, 16-exhaust port, 2-battery module, 21-battery cell, 22-heat sink, 221-air inlet, 222-air duct, 223-air outlet, 23-middle fixing plate, 231-air guide port, 24-end plate, 25-convex plate, 26-upper side cover, 3-fan, 4-liquid cooling plate, 5-battery management circuit board, 10-battery pack with multiple cooling methods, 20-support frame. DETAILED DESCRIPTION

[0050] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0051] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0052] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0053] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] Refer to the following Figures 1 to 15A battery pack and an energy storage system with multiple cooling methods according to some embodiments of the present application are described.

[0056] Embodiment 1

[0057] See also Figures 1 to 5 As shown, an embodiment of the present application provides a battery pack 10 with multiple cooling methods, including: a main housing 1 and a battery module 2; wherein the battery module 2 is disposed in the main housing 1, and an installation space is formed between the battery module 2 and the main housing 1, and the installation space is used to install a liquid cooling plate 4 or a support plate without a liquid cooling function;

[0058] An installation area is formed on one side of the main shell 1, and the installation area is used to install the fan 3. The main shell 1 is also formed with an air guide hole 15, so that the outside of the main shell 1, the fan 3 and the inside of the main shell 1 are connected; the other opposite side of the main shell 1 is formed with an exhaust port 16 connected with its interior; the installation area and the installation space are respectively located on different sides of the battery module 2; it should be noted that the side or side mentioned here may refer to the side in the surrounding direction, that is, the circumferential direction, or the top, that is, the top side, or the bottom, that is, the bottom side.

[0059] Based on the structure described above, it can be known that the present application provides a new type of battery pack 10 with multiple cooling methods, which can realize multiple cooling methods: the first is to install a liquid cooling plate 4 in the installation space, install a fan 3 in the installation area, and adjust the power of the fan 3, as well as the flow rate, flow rate and other parameters of the liquid cooling system, so as to realize air cooling and liquid cooling at the same time; the second is to install a support plate that only plays a supporting role in the installation space, install a fan 3 in the installation area, and adjust the power of the fan 3, so as to realize only air cooling; the third is to install a liquid cooling plate 4 in the installation space, leave the installation area vacant, and adjust the flow rate, flow rate and other parameters of the liquid cooling system, so as to realize only liquid cooling.

[0060] It can be seen that the new battery pack 10 with multiple cooling methods provided in the present application can be compatible with different heat dissipation structures according to actual conditions, and can further realize air cooling, liquid cooling or a combination of air cooling and liquid cooling. It has strong selectivity and can not only realize the heat dissipation of the battery pack, make the battery pack temperature more uniform, and improve the performance and service life of the battery pack, but also can save energy and reduce costs.

[0061] In this embodiment, preferably, Figure 5As shown, the battery pack 10 with multiple cooling methods also includes a heat sink 22, the battery module 2 includes a battery cell 21 assembly, the battery cell 21 assembly includes a plurality of battery cells 21 arranged sequentially along a preset direction, and the heat sink 22 is interspersed between the battery cells 21; the heat sink 22 forms an air duct 222 and an air inlet 221 and an air outlet 223 respectively connected to the air duct 222; the installation area is formed on the side of the main shell 1 close to the air inlet 221, and the air inlet 221 is connected to the fan 3.

[0062] According to the structure described above, the heat sink 22 provides a heat dissipation surface area and an air duct 222 , and the fan 3 provides wind pressure. Specifically, the fan 3 delivers cold air from the outside of the battery pack to the air duct 222 . During the circulation of the cold air in the air duct 222 , it plays a role in dissipating heat for the battery cell 21 .

[0063] In addition, the heat sink 22 divides the battery cell 21 into areas, and when thermal runaway occurs in the battery cell 21, protection can be provided to avoid affecting the battery cells 21 in other areas. In addition to preventing thermal runaway, it has higher safety.

[0064] Furthermore, preferably, the battery cell 21 and the heat sink 22 are connected by gluing, which makes the structure more stable and stronger, and helps to improve the overall strength.

[0065] In this embodiment, preferably, Figure 3 and Figure 5 As shown, the battery module 2 further includes an intermediate fixing plate 23 and an end plate 24; wherein, along a preset direction, the end plates 24 are provided at both ends of the battery cell 21 assembly, and the end plates 24 are connected to the main housing 1. It can be seen that the end plates 24 are located on the large surface side of the battery cell 21, that is, the surface formed by the long side and the high side, and this large surface side is an important expansion side;

[0066] Along a direction perpendicular to the preset direction, an intermediate fixing plate 23 is provided on one side of the battery cell 21 assembly, and the intermediate fixing plate 23 is connected to the main housing 1 ; the end plate 24 is connected to the intermediate fixing plate 23 .

[0067] According to the structure described above, the two end plates 24 and the two intermediate fixing plates 23 are all connected to the main shell 1, and any end plate 24 is respectively connected to the two intermediate fixing plates 23 to form a stable support and limiting structure, which can effectively prevent the battery cell 21 from expanding during use.

[0068] Further, preferably, the end plate 24 is connected to the main housing 1 by means of bolts, snaps or welding.

[0069] Further, preferably, the intermediate fixing plate 23 is connected to the main housing 1 by means of bolts, snaps or welding.

[0070] Further, preferably, any end plate 24 is respectively connected to the two middle fixing plates 23 by means of bolts, snaps or welding.

[0071] Further, preferably, the heat dissipation plate 22 is a plate-shaped structure parallel to a large surface of the battery cell 21 .

[0072] In this embodiment, preferably, Fig. 9 and Fig.10 As shown, the middle fixed plate 23 is formed with an air guide 231, and along a direction perpendicular to the preset direction, the fan 3, the air guide 231, the air inlet 221, the air duct 222, the air outlet 223 and the exhaust port 16 are sequentially arranged and connected. It can be seen that a linear air cooling channel is formed to increase the flow speed of the gas, thereby improving the cooling efficiency.

[0073] In this embodiment, preferably, Figure 12 to Figure 14 As shown, the air duct 222 extends in a direction perpendicular to the preset direction, and an air inlet 221 and an air outlet 223 are respectively formed at both ends of the air duct 222, and the air inlet 221 is arranged close to the air guide port 231.

[0074] According to the structure described above, the wind entering through the air guide port 231 can directly enter the linear air duct 222 and be directly discharged from the tail end, thereby increasing the circulation speed of the wind and helping to improve the cooling effect.

[0075] Further, preferably, the number of air ducts 222 is multiple, and they are sequentially spaced along the height direction of the heat sink 22, and any air duct 222 is equipped with an air inlet 221 and an air outlet 223 to form a harmonica-type heat dissipation structure, which has a good heat dissipation effect and good overall strength and rigidity. Of course, the structure of the heat sink 22 is not limited to the above, and other structures can also be used. For example, the heat sink 22 can also be provided with only one air duct 222, which extends along the height direction and the length direction of the heat sink 22, that is, a large cavity, that is, a channel, is formed inside the heat sink 22.

[0076] In this embodiment, preferably, Fig.12 As shown, there are multiple heat dissipation plates 22, which are sequentially arranged at intervals along a preset direction.

[0077] According to the structure described above, it can be seen that the use of multiple heat dissipation plates 22 ensures the uniformity of the temperature of the battery module 2 along its length direction, which greatly improves the heat dissipation effect and heat dissipation efficiency.

[0078] In this embodiment, preferably, Figure 5 As shown, the battery cell 21 assembly is connected to the end plate 24 and the middle fixing plate 23 respectively by gluing.

[0079] According to the structure described above, the battery cell 21 is bonded together with the end plate 24 and the intermediate fixing plate 23 by gluing, which plays a role in reinforcing the battery module 2 as a whole and helps to improve the overall strength.

[0080] In this embodiment, preferably, the end plate 24 and the side of the intermediate fixing plate 23 close to the battery core 21 are both provided with an insulating coating.

[0081] According to the structure described above, it can be known that an insulating coating is provided between the battery cell 21 and the end plate 24 and the intermediate fixing plate 23, thereby playing a role of insulating protection.

[0082] In this embodiment, preferably, the heat sink 22 is made of aluminum, which has good thermal conductivity and helps to improve the heat dissipation effect. Of course, the heat sink 22 is not limited to the above, and the material of the heat sink 22 can also be selected from other materials, which can be designed according to actual needs.

[0083] In this embodiment, preferably, Figure 5 As shown, the battery module 2 further includes an upper cover 26 and a busbar 25; wherein the upper cover 26 is disposed on the top side of the intermediate fixing plate 23, the end plate 24 and the battery cell 21 assembly, and the upper cover 26 is connected to the intermediate fixing plate 23 and the end plate 24, and the upper cover 26 plays a role in protecting the top of the battery cell 21 assembly and the busbar 25;

[0084] A tab cluster is formed on the top side of the battery cell 21 assembly along its height direction. The busbar 25 is disposed between the upper cover 26 and the battery cell 21 assembly and is used to connect the tab cluster.

[0085] In this embodiment, preferably, Figure 3 , Figure 4 and Fig.11 As shown, the main housing 1 includes a front panel 11, a back panel 12, a side panel 13 and an upper side cover 14; wherein the front panel 11 is L-shaped, the battery module 2 is arranged on the bottom support portion 112 of the L-shaped front panel 11, and the side support portion 111 of the front panel 11 and the back panel 12 are respectively arranged on the front side and the rear side of the battery module 2;

[0086] The two side panels 13 are respectively arranged on the other two opposite sides of the battery module 2 in the circumferential direction, and any side panel 13 is respectively connected to the front panel 11 and the back panel 12; the upper side cover 14 is arranged on the top sides of the front panel 11, the back panel 12 and the side panel 13 and is respectively connected; the front panel 11 forms an installation area, and an installation space is formed between the bottom support portion 112 of the front panel 11 and the bottom of the battery module 2.

[0087] According to the structure described above, the assembly process of the battery pack 10 with multiple cooling methods provided in the present application when it has both air cooling and liquid cooling structures is as follows:

[0088] When assembling the battery pack, first assemble the liquid cooling plate 4 and the front panel 11, apply thermal conductive structural glue at the contact point between the upper part of the liquid cooling plate 4 and the battery cell 21 (when installing a common support plate, apply thermal conductive structural glue at the contact point between the upper part of the support plate and the battery cell 21), so as to achieve bonding and fixing with the battery cell 21, and then install the end plate 24 on one side, and assemble the foam, battery cell 21, heat dissipation plate 22, battery cell 21, foam and the other end plate 24 in sequence from one side of the end plate 24. The end plate 24 and the front panel 11 can be fixed with bolts, and then install the intermediate fixing plate 23 and the back plate 12, and the middle fixing plate 23, the back plate 12 and the battery cell 21 are fixed with heat-conductive structural glue at the contact point, the middle fixing plate 23 and the back plate 12 are fixed with the end plate 24 and the front panel 11 by bolts, so as to restrain the battery module 2 and prevent the battery cell 21 from expanding during use. The middle fixing plate 23 and the back plate 12 are fixed with the front panel 11 by bolts, and then the busbar 25 is assembled, and after the battery cell 21 tabs are welded to the busbar 25, they are glued and bonded to the upper cover 26.

[0089] Then, after assembling components such as the circuit board, wiring harness, and fan 3, assemble the two side panels 13, namely the left side panel 13 and the right side panel 13. The left side panel 13, the right side panel 13, and the end panel 24 are fixed with bolts. Finally, assemble the upper side cover 14. The upper side cover 14 is fixed with screws to the front panel 11, the rear fixing plate, the middle fixing plate 23, the left side panel 13, and the right side panel 13.

[0090] It can be seen that in the present application, the battery module 2 is directly assembled in the main shell 1, which eliminates the shell insertion process after the battery module 2 is assembled outside the shell in the prior art, simplifies the grouping process, makes it easy to implement, improves the assembly efficiency, reduces structural parts, and further reduces the cost of the battery pack.

[0091] Further, preferably, Figures 2 to 4 As shown, along the height direction of the main shell 1, an installation space is formed between the battery module 2 and the bottom side of the main shell 1; one circumferential side of the main shell 1, such as the front panel 11, is formed with a installation area and an air guide hole 15, and the other circumferential opposite side of the main shell 1, such as the back panel 12, is formed with an exhaust port 16. It can be seen that the air guide hole 15 and the exhaust port 16 are arranged opposite to each other.

[0092] According to the structure described above, the liquid cooling plate 4 is integrated at the bottom of the battery module 2, making full use of the height space and being able to cool the bottoms of all the battery cells 21, which is a more conventional setting method; while the air cooling structure is located above the liquid cooling plate 4, and air is taken in from one side of the battery module 2, and after flowing along the horizontal straight air duct 222, air is discharged from the other side of the battery module 2, without interfering with the liquid cooling structure, and each is cooled separately.

[0093] It should be noted that: it is not limited to the above-mentioned installation area and the air guide hole 15 formed on the front panel 11, the exhaust port formed on the back panel 12, and the middle fixing plate 23 formed with the air guide port 231. Other structures can also be used. For example, the fan 3 can also be installed on the back panel 12, and other structures remain unchanged;

[0094] Alternatively, the installation area and the air guide holes 15 can also be formed on the top side of the main shell 1, the exhaust port 16 is formed on the side of the main shell 1 close to the middle fixing plate 23 or on the side away from the middle fixing plate 23, the upper cover 26 and the confluence plate 25 are both formed with air guide ports 231, and when the exhaust port 16 is formed on the side of the main shell 1 away from the middle fixing plate 23, the middle fixing plate 23 is also formed with air guide ports 231, that is, it can be divided into two structures: the first, the installation area and the air guide holes 15 can be formed on the top side of the main shell 1, the exhaust port 16 is formed on the side of the main shell 1 close to the middle fixing plate 23, that is, on the front panel 11, and the heat sink 22 is provided with an arc-shaped air duct 222, which respectively penetrates the top side of the heat sink 22 and the side close to the middle fixing plate 23, so the wind enters from the top, flows along the arc-shaped air duct 222, and is finally discharged from the front panel 11;

[0095] Second, the installation area and the air guide hole 15 can be formed on the top side of the main shell 1, and the exhaust port 16 is formed on the side of the main shell 1 away from the middle fixing plate 23, that is, on the back plate 12. The upper cover 26 and the busbar 25 are both formed with an air guide port 231, and the heat sink 22 is provided with an arc-shaped air duct 222, which respectively penetrates the top side of the heat sink 22 and the side away from the middle fixing plate 23, that is, the side close to the back plate 12. Then, the wind enters from the top, flows along the arc-shaped air duct 222, and is finally discharged from the back plate 12.

[0096] In addition, it should be noted that: in the present embodiment, the liquid cooling plate 4 is arranged at the bottom of the battery module 2. Of course, it is not limited to this. The liquid cooling plate 4 can also be arranged at the side or top side of the battery module 2 in the circumferential direction, and the specific design is based on actual needs.

[0097] In this embodiment, preferably, Fig.11 As shown, vertically arranged extension plates 113 are further arranged on both sides of the side support portion 111 along the length direction thereof, extending to the side of the side plate 13 and connected to the side plate 13 .

[0098] In this embodiment, preferably, Figure 1 and Fig.11 As shown, the installation area is formed on the outer wall of the main shell 1 , the air guide hole 15 is formed and penetrates the inner wall of the main shell 1 , and the installation area is connected with the interior of the main shell 1 through the air guide hole 15 .

[0099] According to the structure described above, it can be seen that installing the fan 3 on the outer wall of the main housing 1 avoids occupying the space of the battery module 2, which helps to improve the energy density within the effective space.

[0100] Further, preferably, the fan 3 is directly mounted on the outer wall of the main housing 1, the fan 3 occupies a certain area, or a groove is provided on the outer wall of the main housing 1, the fan 3 is installed in the groove, or the fan 3 is embedded in the through hole of the side wall of the main housing 1. Of course, it is not limited to the above, the fan 3 can also be directly mounted on the inner wall of the main housing 1, or a groove is provided on the inner wall of the main housing 1, the fan 3 is installed in the groove, and the specific design is based on actual needs. Further, preferably, the fan 3 is connected to the main housing 1 by bolts or buckles, which is a detachable connection method, which is convenient for later maintenance.

[0101] In this embodiment, preferably, Figures 7 to 10 As shown, the battery pack 10 with multiple cooling methods also includes a battery management circuit board 5, and the battery management circuit board 5 is arranged between the main shell 1 and the battery module 2, and part of the structure of the liquid cooling plate 4 extends along the surface of the battery management circuit board 5.

[0102] According to the structure described above, the liquid cooling plate 4 can cool the battery management circuit board 5, and can extract the heat generated by the battery management circuit board 5 when it is working, so as to avoid the failure of the battery management circuit board 5 caused by high temperature and improve the service life. Therefore, the heat of the battery pack and the battery management circuit board 5 can be dissipated at the same time, which can comprehensively improve the life of the battery pack.

[0103] Furthermore, preferably, the battery management circuit board 5 is integrated at the bottom of the battery module 2 and is located on the upper surface of the liquid cooling plate 4 to fully utilize the height space.

[0104] Further, preferably, the battery management circuit board 5 is disposed close to the side support portion 111 of the front panel 11. Of course, it is not limited thereto and can also be designed according to actual needs.

[0105] In this embodiment, preferably, when the installation area is vacant, the battery pack 10 with multiple cooling methods further includes a sealing plate structure, and the sealing plate covers the installation area and the air guide hole 15. Of course, it is not limited to this, and the sealing plate may not be provided, and the specific design is based on actual needs.

[0106] Further, preferably, the sealing plate is detachably connected to the main housing 1 .

[0107] Embodiment 2

[0108] See also Fig.15As shown, the second embodiment of the present application also provides an energy storage system, including the battery pack 10 with multiple cooling methods of the above-mentioned first embodiment, and thus, has all the beneficial technical effects of the battery pack 10 with multiple cooling methods, and the same technical features and beneficial effects are no longer repeated.

[0109] In this embodiment, preferably, Fig.15 As shown, the energy storage system also includes a support frame 20 and an outer cover plate; wherein, a battery pack 10 with multiple cooling methods is arranged in the support frame 20; the number of battery packs 10 with multiple cooling methods is multiple, and they are arranged sequentially along the height direction of the support frame 20; the outer cover plate is fixed to the outside of the support frame 20.

[0110] According to the structure described above, the energy storage system provided in the present application has various cooling methods, which can be air-cooled, liquid-cooled, or a combination of air-cooled and liquid-cooled.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack with multiple cooling methods, characterized in that: include: A main housing and a battery module; wherein the battery module is disposed in the main housing, and an installation space is formed between the battery module and the main housing, and the installation space is used to install a liquid cooling plate or a support plate without a liquid cooling function; An installation area is formed on one side of the main shell, and the installation area is used to install a fan. The main shell is also formed with an air guide hole so that the outside of the main shell, the fan and the inside of the main shell are connected; an exhaust port connected to the inside is formed on the other opposite side of the main shell; the installation area and the installation space are respectively located on different sides of the battery module.

2. The battery pack with multiple cooling methods according to claim 1, characterized in that: The battery pack with multiple cooling methods further includes a heat sink, the battery module includes a battery cell assembly, and the battery cell assembly includes a plurality of battery cells arranged in sequence along a preset direction, and the heat sink is interspersed between the battery cells; The heat sink is formed with an air duct and an air inlet and an air outlet respectively connected to the air duct, and the installation area is formed on the side of the main shell close to the air inlet, and the air inlet is connected to the fan.

3. The battery pack with multiple cooling methods according to claim 2, characterized in that: The battery module also includes an intermediate fixing plate and an end plate; wherein, along the preset direction, the end plates are arranged at both ends of the battery cell assembly, and the end plates are connected to the main shell; along the direction perpendicular to the preset direction, the intermediate fixing plate is arranged on one side of the battery cell assembly, and the intermediate fixing plate is connected to the main shell; the end plate is connected to the intermediate fixing plate.

4. The battery pack with multiple cooling methods according to claim 3, characterized in that: The middle fixed plate is formed with an air guide port, and along a direction perpendicular to the preset direction, the fan, the air guide port, the air inlet, the air duct, the air outlet and the exhaust port are sequentially arranged and connected; and / or The air duct extends along a direction perpendicular to the preset direction; and / or There are multiple air ducts, which are sequentially spaced along the height direction of the heat sink, and any of the air ducts is equipped with one air inlet and one air outlet.

5. The battery pack with multiple cooling methods according to claim 3, characterized in that: The battery cell assembly is connected to the end plate and the intermediate fixing plate respectively by gluing; and / or The end plate and the middle fixing plate are both provided with an insulating coating on one side close to the battery core; and / or The battery module further comprises an upper cover and a busbar; wherein the upper cover is arranged on the top side of the intermediate fixing plate, the end plate and the battery cell assembly, and the upper cover is connected to the intermediate fixing plate and the end plate; a tab cluster is formed on the top side of the battery cell assembly along its height direction, and the busbar is arranged between the upper cover and the battery cell assembly and is used to connect the tab cluster; The installation area and the air guide hole are formed on the top side of the main shell, the exhaust port is formed on the side of the main shell close to the intermediate fixing plate or on the side away from the intermediate fixing plate, the upper cover and the busbar are both formed with air guide ports, and when the exhaust port is formed on the side of the main shell close to the intermediate fixing plate, the intermediate fixing plate is also formed with an air guide port.

6. The battery pack with multiple cooling methods according to claim 2, characterized in that: The number of the heat dissipation plates is multiple and they are sequentially arranged at intervals along the preset direction; and / or The battery core is connected to the heat sink by gluing; and / or The heat sink is made of aluminum.

7. The battery pack with multiple cooling methods according to claim 1, characterized in that: The main housing includes a front panel, a back panel, a side panel and an upper side cover; wherein the front panel is L-shaped, the battery module is arranged on the bottom support portion of the L-shaped front panel, and the side support portion of the front panel and the back panel are respectively arranged on the front side and the rear side of the battery module; The two side plates are respectively arranged on the other two opposite sides of the battery module in the circumferential direction, and any of the side plates is respectively connected to the front plate and the back plate; the upper side cover is arranged on the top sides of the front plate, the back plate and the side plates and is respectively connected; The side support portion of the front panel, the back plate and one of the upper side covers form the installation area and the air guide hole, and the installation space is formed between the bottom support portion of the front panel, the back plate and the other of the upper side covers and the battery module.

8. The battery pack with multiple cooling methods according to claim 1, characterized in that: The installation area is formed on the outer wall of the main shell, the air guide hole is formed and penetrates the inner wall of the main shell, and the installation area is connected with the interior of the main shell through the air guide hole; and / or The installation space is formed between the battery module and the bottom side of the main shell along the height direction of the main shell; the installation area and the air guide hole are formed on one side of the circumference of the main shell, and the exhaust port is formed on the other side opposite to the circumference of the main shell; and / or The fan is detachably connected to the main housing.

9. The battery pack with multiple cooling methods according to claim 1, characterized in that: The battery pack with multiple cooling methods further includes a battery management circuit board, and the battery management circuit board is arranged between the main housing and the battery module, and a part of the structure of the liquid cooling plate extends along the surface of the battery management circuit board; and / or When the installation area is vacant, the battery pack with multiple cooling methods further includes a sealing plate, and the sealing plate covers the installation area and the air guide hole; and / or The installation space is installed with the liquid cooling plate, and the installation area is installed with the fan; or, the installation space is installed with the support plate, and the installation area is installed with the fan; or, the installation space is installed with the liquid cooling plate, and the installation area is vacant.

10. An energy storage system, characterized in that: It comprises a support frame, an outer cover plate and a battery pack with multiple cooling methods as described in any one of claims 1 to 9; wherein the battery pack with multiple cooling methods is arranged in the support frame; the number of the battery packs with multiple cooling methods is multiple, and they are arranged sequentially along the height direction of the support frame; the outer cover plate is fixed to the outside of the support frame.

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