A battery pack

Abstract

The application discloses a battery pack, comprising: a box side beam having a containing groove; an adapter assembly comprising an adapter pressing block and a liquid cooling pipe, the adapter pressing block and the liquid cooling pipe being connected; the containing groove comprises a pipe containing groove and a pressing block containing groove, the liquid cooling pipe is located in the pipe containing groove, and the adapter pressing block is connected with the pressing block containing groove, so that the liquid cooling pipe and the box side beam are kept relatively static. The application can solve the space occupation of the liquid cooling pipe to the inside of the battery pack, fix and adapt the liquid cooling pipe through the adapter pressing block, improve the stability of the liquid cooling pipe, and reduce shaking.

Description

Technical Field

[0001] This invention relates to the field of battery liquid cooling technology, and more particularly to a battery pack. Background Technology

[0002] Battery packs are commonly used in electric vehicles. The maximum dimensions of the battery pack must meet the requirements of the vehicle's installation space. The design must take into account the installation and maintenance of the battery pack. Therefore, without increasing the size of the vehicle model, it is necessary to optimize the internal space of the battery pack to provide more space for storing the battery modules.

[0003] Existing battery packs have limited internal space, resulting in insufficient space for piping connections to the liquid cooling system. Traditional methods of connecting liquid cooling pipes to liquid cooling plates are insufficient to meet space requirements. Furthermore, the limited space prevents the design of cable tie holders to secure the liquid cooling pipes, causing them to move around inside the battery pack and easily become scratched or damaged, leading to leaks. Summary of the Invention

[0004] To overcome at least one of the defects described in the prior art, the present invention provides a battery pack. This solves the problem of liquid cooling pipes occupying internal space in the battery pack, and simultaneously improves the stability of the liquid cooling pipes and reduces shaking by fixing and connecting the liquid cooling pipes with an adapter clamp.

[0005] The technical solution adopted by this invention to solve its problem is:

[0006] A battery pack includes: a side beam of a housing with a receiving groove; a base plate, the base plate and the side beam of the housing enclose a receiving cavity; at least one battery module, the battery module being assembled in the receiving cavity; a liquid cooling plate current collector, the liquid cooling plate current collector being installed inside the battery module; a connecting assembly, the connecting assembly including a connecting block and a liquid cooling pipe, the connecting block and the liquid cooling pipe being connected, the liquid cooling pipe being in communication with the liquid cooling plate current collector; the receiving groove includes a pipe receiving groove and a block receiving groove, the liquid cooling pipe being located in the pipe receiving groove, and the projection of the liquid cooling pipe on the base plate being at least partially located within the side beam of the housing; the connecting block being connected to the block receiving groove to keep the liquid cooling pipe and the side beam of the housing relatively stationary, and the projection of the connecting block on the base plate being at least partially located within the side beam of the housing.

[0007] By adopting the above solution, a groove is cut into the side beam of the enclosure to reduce the space occupied inside the battery pack. At the same time, an adapter block is used to fix the liquid cooling pipe in the pipe receiving groove inside the side beam of the enclosure, thus preventing the liquid cooling pipe from shaking.

[0008] Furthermore, the adapter block includes a first adapter block, and the liquid cooling pipe includes an inlet pipe and an outlet pipe. The first adapter block is provided with an inlet chamber, an inlet nozzle, an outlet chamber, and an outlet nozzle. The inlet nozzle is connected to the main coolant pipe outside the side beam of the housing. The inlet nozzle is connected to the inlet pipe through the inlet chamber, and the outlet nozzle is connected to the outlet pipe through the outlet chamber.

[0009] By adopting the above scheme, the inlet and outlet water nozzles are connected to the outside of the battery pack by setting a first adapter block, so as to replace the coolant in the liquid cooling pipe.

[0010] Furthermore, a conveying inlet pipe is connected between the inlet pipe and the inlet of the liquid cooling plate collector, and a conveying outlet pipe is connected between the outlet pipe and the outlet of the liquid cooling plate collector.

[0011] By adopting the above scheme, the coolant in the inlet pipe can be transferred to the liquid cooling plate manifold through the inlet pipe, and then transferred to the outlet pipe through the outlet pipe.

[0012] Furthermore, the transfer pressure block also includes a second transfer pressure block, of which two are provided and respectively disposed at both ends of the pipe receiving tank. The conveying inlet pipe is connected to the inlet pipe through the second transfer pressure block, and the conveying outlet pipe is connected to the outlet pipe through the second transfer pressure block.

[0013] By adopting the above solution, two second transition pressure blocks are set up to work with the first transition pressure block to fix the inlet pipe and the outlet pipe respectively, thus preventing shaking.

[0014] Furthermore, the second adapter block is provided with a connecting water nozzle, which is configured to connect to the inlet or outlet liquid delivery pipe.

[0015] By adopting the above solution, and connecting the water inlet pipe or the water outlet pipe to the water nozzle, the coolant can be delivered to the battery module to achieve a heat dissipation effect and cool the battery.

[0016] Furthermore, both the inlet and outlet liquid delivery pipes are equipped with module connection blocks for connecting the liquid cooling plate current collector in the battery module.

[0017] By adopting the above solution, the liquid inlet pipe or liquid outlet pipe can be connected to and fixed to the battery module.

[0018] Furthermore, the battery module includes an upper battery module and a lower battery module arranged along the height direction of the battery pack, and the liquid cooling plate current collector of the upper battery module and the liquid cooling plate current collector of the lower battery module are connected through the module connecting block.

[0019] By adopting the above solution, single-layer or double-layer battery modules can be connected through module connection blocks.

[0020] Furthermore, the module connection pressure block includes: a pressure block body having a cavity; a first water nozzle communicating with the cavity of the pressure block body for communicating with a liquid inlet pipe or a liquid outlet pipe; a second water nozzle communicating with the cavity of the pressure block body for communicating with the liquid cooling plate current collector of the upper battery module and the liquid cooling plate current collector of the lower battery module; and a fixed bracket connected to the pressure block body for connecting with the battery module.

[0021] By adopting the above solution, the connection between the liquid inlet pipe, the liquid outlet pipe, the module connecting pressure block, and the liquid cooling plate current collector in the battery module can be achieved.

[0022] Furthermore, the inlet and outlet water nozzles of the first adapter block face outwards from the side beam of the housing, and a stepped groove is provided on the inner side of the side beam of the housing.

[0023] By adopting the above solution, the stability of the first adapter block is improved, thereby achieving the effect of fixing the liquid cooling pipe.

[0024] Furthermore, the connecting water nozzle of the second adapter block faces the inner side of the box body side beam, and the connecting water nozzle, the inlet water nozzle, and the outlet water nozzle are parallel.

[0025] By adopting the above scheme, the connection and layout of the liquid cooling pipes on both the inner and outer sides of the box body side beam are realized, thereby improving efficiency.

[0026] Furthermore, quick connectors are provided at the ends of both the inlet and outlet pipes for quick connection and assembly.

[0027] By adopting the above solution and setting up quick connectors, the assembly speed of the transmission tube can be increased, making assembly faster.

[0028] Furthermore, in each of the module connecting blocks, there are two second water nozzles. The second water nozzles are arranged along the length direction of the module connecting block to communicate with the liquid cooling plate current collector of the upper battery module and the liquid cooling plate current collector of the lower battery module.

[0029] By adopting the above solution, the double-layer liquid cooling plate current collector in the battery module can be connected through the module connecting pressure block to form an integrated liquid cooling circuit.

[0030] Furthermore, the battery module is also provided with a fixing structure, which connects the liquid inlet pipe and the liquid outlet pipe to the battery module to keep the liquid inlet pipe, the liquid outlet pipe and the battery module relatively stationary.

[0031] By adopting the above solution, the inlet and outlet pipes are fixed by multiple fixing structures, thus avoiding pipe scratches and leaks caused by the shaking of the inlet and outlet pipes themselves.

[0032] Furthermore, the battery module also includes a tray, and the fixing structure is disposed on the tray.

[0033] By adopting the above solution and placing the fixing structure on the tray, the overall stability of the fixing structure is improved.

[0034] Furthermore, the fixing structure is a pipe support, used to support and engage the inlet or outlet liquid delivery pipe.

[0035] By adopting the above solution, the inlet and outlet pipes are fixed on the module bracket in a simple and low-cost manner.

[0036] Furthermore, the battery module also includes a module bracket, and the trays of the upper battery module and the lower battery module are connected through the module bracket.

[0037] By adopting the above solution, the upper battery module and the lower battery module can be connected and fixed to form a stable whole.

[0038] In summary, the battery pack provided by this invention has the following technical effects:

[0039] 1. By setting a receiving groove on the side beam of the battery pack, the problem of liquid cooling pipe connection and liquid inlet / outlet occupying the battery module space of the battery pack is solved;

[0040] 2. By setting an adapter block to fix the liquid cooling pipe inside the receiving groove, the stability of the liquid cooling pipe inside the battery pack is improved and the shaking problem is avoided;

[0041] 3. By setting up a module connecting pressure block, the double-layer liquid cooling plate current collector and liquid cooling pipe are connected to form a liquid cooling circuit, which solves the problem of difficult connection of the liquid cooling pipe of the lower battery module;

[0042] 4. By setting a fixing structure at the edge of the battery module bracket, the liquid inlet pipe and liquid outlet pipe are fixed to the battery module, which solves the problem of leakage caused by the shaking of the liquid inlet pipe and liquid outlet pipe. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a partial explosion structure according to an embodiment of the present invention;

[0044] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0045] Figure 3 This is a top view structural diagram of an embodiment of the present invention;

[0046] Figure 4 for Figure 3 Cross-sectional view of AA in the middle;

[0047] Figure 5 This is a schematic diagram of the connection structure of the liquid cooling pipe and the transmission pipe according to an embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of the module connection pressure block structure according to an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of the connection structure between the module connecting pressure block and the cooling plate current collector according to an embodiment of the present invention;

[0050] Figure 8 for Figure 2 Enlarged area B.

[0051] The meanings of the reference numerals in the attached figures are as follows:

[0052] 1. Shell; 11. Box side beam; 111. Pipe receiving groove; 112. Pressure block receiving groove; 113. Stepped slot; 12. Base plate; 2. Adapter assembly; 21. Adapter pressure block; 211. First adapter pressure block; 2111. Liquid inlet nozzle; 2112. Liquid outlet nozzle; 212. Second adapter pressure block; 2121. Connecting nozzle; 22. Liquid cooling pipe; 221. Liquid inlet pipe; 222. Liquid outlet pipe; 31. Conveyor liquid inlet pipe; 32. Conveyor liquid outlet pipe; 33. Quick connector; 4. Module connecting pressure block; 41. Pressure block body; 42. First nozzle; 43. Second nozzle; 44. Fixing bracket; 441. Connecting hole; 5. Battery module; 51. Module bracket; 52. Tray; 6. Liquid cooling plate current collector; 61. Connecting part; 62. Pipe; 63. Converging connector; 7. Fixing structure. Detailed Implementation

[0053] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0054] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments, and these embodiments do not constitute a limitation on the embodiments of the present invention.

[0055] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0057] See Embodiment 1 of the present invention. Figures 1-8 As shown, a battery pack is disclosed, including a casing side beam 11, a base plate 12, a battery module 5, a liquid-cooled current collector 6, and a connecting assembly 2. The casing side beam 11 has a receiving groove; the base plate 12 and the casing side beam 11 enclose a receiving cavity; at least one battery module 5 is provided and assembled in the receiving cavity; the liquid-cooled current collector 6 is installed in the battery module 5; the connecting assembly 2 includes a connecting pressure block 21 and a liquid-cooled pipe 22, which are connected by methods including but not limited to welding, snap-fitting, and adhesive bonding. The liquid cooling pipe 22 is connected to the liquid cooling plate current collector 6. The receiving groove includes a pipe receiving groove 111 and a pressure block receiving groove 112. The liquid cooling pipe 22 is located in the pipe receiving groove 111, and the projection of the liquid cooling pipe 22 on the bottom plate 12 is at least partially located in the side beam 11 of the housing. The adapter pressure block 21 is connected to the pressure block receiving groove 112 to keep the liquid cooling pipe 22 and the side beam 11 of the housing relatively stationary, and the projection of the adapter pressure block 21 on the bottom plate 12 is at least partially located in the side beam 11 of the housing. By adopting a grooved structure for the side beam 11 of the housing, the space occupied inside the battery pack is reduced. At the same time, the adapter pressure block 21 is used to fix the liquid cooling pipe 22 in the pipe receiving groove 111 inside the side beam 11 of the housing, avoiding the shaking of the liquid cooling pipe 22.

[0058] In this embodiment, the liquid cooling structure is applied inside the battery pack, but it can also be applied to other scenarios with liquid cooling structures. The battery pack typically includes a housing 1 and multiple battery modules 5 located inside the housing 1. Each battery module 5 includes an upper battery module and a lower battery module arranged along the height direction of the battery pack. The upper and lower battery modules are fixed together by a module bracket 51. Specifically, each of the upper and lower battery modules includes a tray 52, a plurality of battery cells arranged on the tray 52, and a plurality of liquid cooling plate current collectors 6 arranged between the battery cells. The trays 52 of the upper and lower battery modules are connected by the module bracket 51. The liquid cooling plate current collectors 6 are used to dissipate heat from the battery. The housing 1 includes four box-shaped side beams 11, a top cover (not shown in the figure), and a bottom plate 12. In this embodiment, at least one box-shaped side beam 11 has a pipe receiving groove 111 and a pressure block receiving groove 112 on its inner side to fix the liquid cooling pipe 22 adapter in the liquid cooling structure, thereby improving the overall stability of the liquid cooling pipe 22. Specifically, the adapter pressure block 21 includes a first adapter pressure block 211, and the liquid cooling pipe 22 includes an inlet pipe 221 and an outlet pipe 222. The first adapter pressure block 211 is provided with an inlet chamber, an inlet water nozzle 2111, an outlet chamber, and an outlet water nozzle 2112. The inlet water nozzle 211... A coolant main pipe is connected to the outside of the side beam 11 of the housing. The inlet nozzle 2111 is connected to the inlet pipe 221 through the inlet chamber, and the outlet nozzle 2112 is connected to the outlet pipe 222 through the outlet chamber. A first adapter block 211 connects the inlet nozzle 2111 and the outlet nozzle 2112 to the outside of the battery pack to facilitate the replacement of coolant in the liquid cooling pipe 22. A transfer inlet pipe 31 is also connected between the inlet pipe 221 and the inlet of the liquid cooling plate current collector 6, and a transfer outlet pipe 32 is also connected between the outlet pipe 222 and the outlet of the liquid cooling plate current collector 6. The coolant in the inlet pipe 221 can be transferred to the liquid cooling plate current collector 6 through the transfer inlet pipe 31, and then transferred to the outlet pipe 222 through the transfer outlet pipe 32.

[0059] Furthermore, the adapter block 21 also includes a second adapter block 212. Two second adapter blocks 212 are provided, respectively located at both ends of the pipe receiving groove 111. The inlet pipe 31 is connected to the inlet pipe 221 via the second adapter block 212, and the outlet pipe is connected to the outlet pipe 222 via the second adapter block 212. By providing two second adapter blocks 212 in conjunction with the first adapter block 211, the inlet pipe 221 and the outlet pipe 222 are fixed respectively, preventing shaking.

[0060] Specifically, the inlet nozzle 2111 and outlet nozzle 2112 of the first adapter block 211 face outwards from the side beam 11 of the housing. A stepped groove 113 is provided on the inner side of the side beam 11. The first adapter block 211 is welded and fixed within the stepped groove 113, improving its stability and thus achieving a secure fixation of the liquid cooling pipe 22. Both the inlet pipe 221 and outlet pipe 222 are welded into the first adapter block 211, and the inlet pipe 221... The inlet pipe 221 and outlet pipe 222 are two independent channels, connected to the liquid cooling plate current collector 6 in the battery module 5 to form a closed loop. This allows the coolant to enter the inlet pipe 221 from the inlet nozzle 2111, flow through the battery module 5 to absorb heat, and then return from the outlet pipe 222 to the outlet nozzle 2112, thus achieving coolant replacement or heat exchange. The second adapter block 212 is equipped with a connecting nozzle 2121, which is configured to connect to the conveying inlet pipe 31 or the conveying outlet pipe 32. The connecting nozzle 2121 of the second adapter block 212 faces the inner side of the housing side beam 11. The connecting nozzle 2121, the inlet nozzle 2111, and the outlet nozzle 2112 are parallel, realizing the connection and layout of the liquid cooling pipes 22 on the inner and outer sides of the housing side beam 11, thereby maximizing space utilization.

[0061] It should be noted that in this embodiment, the liquid cooling pipe 22 is an aluminum pipe, which is lightweight, inexpensive, and has good thermal conductivity. Of course, other materials can be selected in other embodiments.

[0062] Both the inlet pipe 31 and the outlet pipe 32 are equipped with module connecting blocks 4 for connecting the liquid cooling plate current collector 6 in the battery module 5. By connecting the inlet pipe 31 and the outlet pipe 32 through the water nozzle 2121, the coolant can be sent to the battery module 5 to achieve heat dissipation and cool the battery.

[0063] The module connecting pressure block 4 includes a pressure block body 41, a first water nozzle 42, a second water nozzle 43, and a fixing bracket 44. The pressure block body 41 has a cavity. The first water nozzle 42 communicates with the cavity of the pressure block body 41 and is used to communicate with the liquid inlet pipe 31 or the liquid outlet pipe 32. The second water nozzle 43 communicates with the cavity of the pressure block body 41 and is used to communicate with the liquid cooling plate current collector 6 of the upper battery module and the liquid cooling plate current collector 6 of the lower battery module in the battery module 5. The fixing bracket 44 is connected to the pressure block body 41. Used to connect with the battery module 5, it can realize the communication effect between the liquid inlet pipe 31, the liquid outlet pipe 32, the module connecting pressure block 4 and the liquid cooling plate current collector 6 in the battery module 5. In each of the module connecting pressure blocks 4, there are two second water nozzles 43. The second water nozzles 43 are arranged along the length direction of the module connecting pressure block 4 to communicate with the double-layer liquid cooling plate current collector 6 in the battery module 5. The double-layer liquid cooling plate current collector 6 in the battery module 5 are connected through the module connecting pressure block 4 to form an integral liquid cooling circuit.

[0064] In this embodiment, the transmission pipe 3 is a flexible tube, and quick connectors 33 are provided at both ends of the transmission pipe 3. It can be quickly assembled and connected to the first water nozzle 42 of the module connecting pressure block 4, and can also be quickly assembled and connected to the water nozzle 2121 on the second adapter pressure block 212. By using a combination of multiple sets of module connecting pressure blocks 4 and transmission pipe 3, the function of communicating with the liquid cooling plate current collector 6 of multiple battery modules 5 can be achieved.

[0065] It should be noted that the battery pack may contain multiple battery modules 5. The battery modules 5 may be single-layer or double-layer. A liquid cooling plate current collector 6 is provided between the rows of large cylindrical batteries. Each liquid cooling plate current collector 6 has a connection part 61 at both ends. The connection part 61 on the same side of each liquid cooling plate current collector 6 is connected in series with a pipe 62. Each pipe 62 is provided with a converging connector 63. When a single-layer large cylindrical battery is used, one of the second water nozzles 43 of the module connecting pressure block 4 is connected to the liquid cooling plate current collector 6 through one converging connector 63, and the other second water nozzle 43 is blocked. When a double-layer large cylindrical battery is used, each battery module 5 contains four junction connectors 63. The two junction connectors 63 on the same side of the battery module 5 are connected to the two second water nozzles 43 on the same module connecting pressure block 4, so as to introduce coolant into the liquid cooling plate current collector 6 in the battery module 5. This solves the problem that the liquid cooling plate current collector 6 of the lower battery of each battery module 5 should not be connected to the liquid cooling pipe 22, and minimizes the space occupied by the cooling structure in the battery module 5.

[0066] It should be noted that in this embodiment, the fixing bracket 44 on the module connecting pressure block 4 includes two brackets, and each fixing bracket 44 is provided with a connecting hole 441. By passing screws through the connecting holes 441, the module connecting pressure block 4 can be fixed to the module bracket 51 as a whole, thereby achieving the fixing effect of the module connecting pressure block 4 and improving the stability of the overall liquid cooling connector. In this embodiment, since the module connecting pressure block 4 is fixed to the side of the module bracket 51, the liquid inlet pipe 31 and the liquid outlet pipe 32 are located on the side of the module bracket 51. In order to further improve the stability of the liquid inlet pipe 3, a fixing structure 7 is provided on the side of the module bracket 51 for clamping the liquid inlet pipe 3, so as to provide a supporting effect for the liquid inlet pipe 3. Of course, the fixing structure 7 can also be directly connected to the tray 52 on any one or both sides to achieve its own fixing effect. Specifically, the fixing structure 7 is a pipe support with a U-shaped cross-section, which can be used to support and clamp the liquid inlet pipe 3. By fixing the liquid inlet pipe 3 with the fixing structure 7, the pipe scratches and leakage caused by the shaking of the liquid inlet pipe 3 are avoided. Of course, in other embodiments, the fixing structure 7 can be other structures that can fix the transmission tube 3, and the present invention does not impose specific limitations.

[0067] In summary, the battery pack provided by this invention has the following technical effects:

[0068] 1. By setting a receiving groove on the side beam 11 of the battery pack, the problem of liquid cooling pipe 22 connecting and liquid inlet / outlet occupying the space of battery module 5 in the battery pack is solved;

[0069] 2. By setting the adapter block 21, the liquid cooling pipe 22 is fixed inside the receiving groove, which improves the stability of the liquid cooling pipe 22 inside the battery pack and avoids shaking problems;

[0070] 3. By setting up a module connecting pressure block 4, the double-layer liquid cooling plate current collector 6 is connected to the liquid cooling pipe 22 to form a liquid cooling circuit, which solves the problem of difficult connection of the liquid cooling pipe 22 of the lower battery module;

[0071] 4. By setting a fixing structure 7 on the edge of the module bracket of the battery module 5, the liquid inlet pipe 31 and the liquid outlet pipe 32 are fixed to the battery module 5, which solves the problem of leakage caused by the shaking of the liquid inlet pipe 31 and the liquid outlet pipe 32.

[0072] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A battery pack, characterized in that: include: Box body side beam (11), the box body side beam (11) has a receiving groove; The bottom plate (12) and the box side beam (11) enclose and form a receiving cavity; At least one battery module (5) is assembled in the receiving cavity; Liquid cooling plate current collector (6), the liquid cooling plate current collector (6) is installed in the battery module (5); The adapter assembly (2) includes an adapter block (21) and a liquid cooling pipe (22), the adapter block (21) and the liquid cooling pipe (22) are connected, and the liquid cooling pipe (22) is connected to the liquid cooling plate collector (6); The receiving groove includes a pipe receiving groove (111) and a pressure block receiving groove (112). The liquid cooling pipe (22) is located in the pipe receiving groove (111), and the projection of the liquid cooling pipe (22) on the bottom plate (12) is at least partially located in the box side beam (11). The transition pressure block (21) is connected to the pressure block receiving groove (112) so that the liquid cooling pipe (22) and the box side beam (11) remain relatively stationary, and the projection of the transition pressure block (21) on the bottom plate (12) is at least partially located in the box side beam (11). The adapter block (21) includes a first adapter block (211), and the liquid cooling pipe (22) includes an inlet pipe (221) and an outlet pipe (222). The first adapter block (211) is provided with an inlet chamber, an inlet water nozzle (2111), an outlet chamber, and an outlet water nozzle (2112). The inlet water nozzle (2111) is connected to the main coolant pipe outside the side beam (11) of the housing. The inlet water nozzle (2111) is connected to the inlet pipe (221) through the inlet chamber, and the outlet water nozzle (2112) is connected to the outlet pipe (222) through the outlet chamber.

2. The battery pack according to claim 1, characterized in that: A transfer inlet pipe (31) is connected between the liquid inlet pipe (221) and the liquid inlet of the liquid cooling plate collector (6), and a transfer outlet pipe (32) is connected between the liquid outlet pipe (222) and the liquid outlet of the liquid cooling plate collector (6).

3. The battery pack according to claim 2, characterized in that: The transfer block (21) further includes a second transfer block (212). There are two second transfer blocks (212), which are respectively located at both ends of the pipe receiving groove (111). The inlet pipe (31) is connected to the inlet pipe (221) through the second transfer block (212), and the outlet pipe is connected to the outlet pipe (222) through the second transfer block (212).

4. The battery pack according to claim 3, characterized in that: The second adapter block (212) is provided with a connecting water nozzle (2121), which is configured to be connected to the liquid inlet pipe (31) or the liquid outlet pipe (32).

5. The battery pack according to claim 2, characterized in that: Both the inlet pipe (31) and outlet pipe (32) are equipped with module connection blocks (4) for connecting the liquid cooling plate current collector (6) in the battery module (5).

6. The battery pack according to claim 5, characterized in that: The battery module (5) includes an upper battery module and a lower battery module arranged along the height direction of the battery pack. The liquid cooling plate current collector (6) of the upper battery module and the liquid cooling plate current collector (6) of the lower battery module are connected through the module connecting block (4).

7. The battery pack according to claim 6, characterized in that: The module connecting block (4) includes: The pressing block body (41) has a cavity; The first water nozzle (42) is connected to the cavity of the pressure block body (41) and is used to connect to the liquid inlet pipe (31) or the liquid outlet pipe (32). The second water nozzle (43) is connected to the cavity of the pressure block body (41) and is used to communicate with the liquid cooling plate current collector (6) of the upper battery module and the liquid cooling plate current collector (6) of the lower battery module. A fixed bracket (44) is connected to the pressure block body (41) and is used to connect to the battery module (5).

8. The battery pack according to claim 1, characterized in that: The inlet water nozzle (2111) and outlet water nozzle (2112) of the first adapter block (211) face the outside of the box body side beam (11), and the inner side of the box body side beam (11) is provided with a stepped groove (113).

9. The battery pack according to claim 4, characterized in that: The connecting water nozzle (2121) of the second adapter block (212) faces the inner side of the box side beam (11), and the connecting water nozzle (2121), the liquid inlet nozzle (2111) and the liquid outlet nozzle (2112) are parallel.

10. The battery pack according to claim 2, characterized in that: The ends of the inlet pipe (31) and outlet pipe (32) are each provided with quick connectors (33) for quick connection and assembly of the inlet pipe (31) and outlet pipe (32).

11. The battery pack according to claim 7, characterized in that: In each of the module connecting blocks (4), there are two second water nozzles (43). The second water nozzles (43) are arranged along the length direction of the module connecting blocks (4) for communicating with the liquid cooling plate current collector (6) of the upper battery module and the liquid cooling plate current collector (6) of the lower battery module.

12. The battery pack according to claim 6, characterized in that: The battery module is also provided with a fixing structure (7), which connects the liquid inlet pipe (31) and the liquid outlet pipe (32) to the battery module so as to keep the liquid inlet pipe (31), the liquid outlet pipe (32) and the battery module relatively stationary.

13. The battery pack according to claim 12, characterized in that: The battery module also includes a tray (52), and the fixing structure (7) is disposed on the tray (52).

14. The battery pack according to claim 12, characterized in that: The fixing structure (7) is a pipe support, used to support and engage the inlet pipe (31) or outlet pipe (32).

15. The battery pack according to claim 13, characterized in that: The battery module (5) also includes a module bracket (51), and the tray (52) of the upper battery module and the tray (52) of the lower battery module are connected through the module bracket (51).

16. The battery pack according to claim 15, characterized in that: The module connecting block (4) includes: The pressing block body (41) has a cavity; The first water nozzle (42) is connected to the cavity of the pressure block body (41) and is used to connect to the liquid inlet pipe (31) or the liquid outlet pipe (32). The second water nozzle (43) is connected to the cavity of the pressure block body (41) and is used to communicate with the liquid cooling plate current collector (6) of the upper battery module and the liquid cooling plate current collector (6) of the lower battery module. The fixed bracket (44) is used to connect the pressure block body (41) to the module bracket (51).

Images