Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle thereof, and the battery pack comprises a bottom support assembly which comprises a bottom support; the top bracket assembly, the top bracket, the top bracket and the bottom bracket define a liquid cooling cavity; the interlayer support assembly comprises an interlayer support located between the bottom support and the top support, and the interlayer support is provided with a plurality of mounting holes; the plurality of batteries are arranged in the mounting holes; wherein the liquid cooling cavity is divided into a first liquid cooling cavity and a second liquid cooling cavity by the interlayer bracket, the interlayer bracket is provided with a communication hole for communicating the first liquid cooling cavity with the second liquid cooling cavity, and at least part of the battery is located in the first liquid cooling cavity and the second liquid cooling cavity. At least part of the battery is immersed in the liquid cooling cavity, so that the battery can be in contact with the refrigerant in a large area, and the heat dissipation effect is improved. Meanwhile, the liquid cooling cavity is divided into the first liquid cooling cavity and the second liquid cooling cavity by the interlayer bracket, the first liquid cooling cavity and the second liquid cooling cavity are communicated through the communication hole, and the interlayer bracket is used for accelerating the heat conduction speed of the refrigerant, thereby improving the heat dissipation efficiency of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack and a vehicle. Background Art

[0002] As electric vehicles continue to pursue longer driving range and faster charging, the battery pack capacity and fast charging capabilities are forced to be further improved, which will increase the heat generated by the battery during the charging and discharging process. If the battery heat generation temperature is too high, there will be a risk of thermal runaway, which in severe cases will cause the electric vehicle to catch fire or even explode, endangering the safety of passengers' lives and property.

[0003] Battery modules are mostly cooled by serpentine liquid cooling plates, which means that multiple serpentine liquid cooling plates are inserted between batteries, and the serpentine liquid cooling plates exchange heat with the batteries through heat conduction. However, the heat exchange area between the serpentine liquid cooling plates and the batteries is limited, which cannot meet higher heat dissipation requirements, and the temperature uniformity between the batteries is poor. Utility Model Content

[0004] The embodiments of the utility model provide a battery pack and a vehicle, which can improve the technical problem of poor temperature uniformity between batteries.

[0005] In a first aspect, an embodiment of the utility model provides a battery pack, characterized in that it includes:

[0006] A bottom bracket assembly, including a bottom bracket;

[0007] A top bracket assembly, comprising a top bracket disposed above the bottom bracket, wherein the top bracket and the bottom bracket enclose a liquid cooling chamber;

[0008] a sandwich bracket assembly, comprising a sandwich bracket located between the bottom bracket and the top bracket, the sandwich bracket being provided with a plurality of mounting holes; and

[0009] A plurality of batteries are arranged in the corresponding mounting holes;

[0010] Among them, the interlayer bracket divides the liquid cooling cavity into a first liquid cooling cavity and a second liquid cooling cavity located above the first liquid cooling cavity, and the interlayer bracket is provided with a connecting hole connecting the first liquid cooling cavity and the second liquid cooling cavity, and at least part of the battery is located in the first liquid cooling cavity and the second liquid cooling cavity.

[0011] In one embodiment, the bottom bracket is provided with a water inlet connected to the first liquid cooling chamber, and the top bracket is provided with a water outlet connected to the second liquid cooling chamber, the water inlet and the water outlet are both located at one end of the battery case or are respectively located at both ends of the battery case, and the connecting hole is located at one end of the battery case away from the water inlet and / or the water outlet.

[0012] In one embodiment, a plurality of the communicating holes are provided, and the plurality of the communicating holes are located at one end of the plurality of the mounting holes.

[0013] In one embodiment, the plurality of batteries are arranged into a plurality of battery rows, and the plurality of battery rows include a plurality of first rows and a plurality of second rows;

[0014] The water inlet and the water outlet are both located at one end of the battery case, and the connecting hole is located at the other end of the battery case. The distance between at least one end of the first row close to the multiple connecting holes and the end of the interlayer bracket away from the water inlet is smaller than the distance between the corresponding end of the second row close to the multiple connecting holes and the end of the interlayer bracket away from the water inlet. The area of ​​the connecting hole located at one end of the first row is smaller than the area of ​​the connecting hole located at one end of the second row.

[0015] In one embodiment, the bottom bracket includes a bottom plate, a bottom side plate connected to the side of the bottom plate, and a first baffle connected to the bottom side plate, the first baffle is close to the end of the bottom side plate, the orthographic projection of the first baffle on the sandwich bracket is located at one end of the plurality of mounting holes away from the connecting holes, at least part of the battery is located between the bottom side plate, the bottom plate and the first baffle, the water inlet is provided on the bottom side plate and on the side of the first baffle away from the battery, and the first baffle is provided with a first drainage hole connecting the water inlet and the first liquid cooling chamber.

[0016] In one embodiment, the first baffle plate includes at least two first baffles and a first connecting portion connecting the two first baffles, the first baffle protrudes into an arc shape in a direction away from the battery, and a plurality of first drainage holes are provided and are respectively located in the first baffles and the first connecting portion;

[0017] The plurality of batteries are arranged into a plurality of battery rows, and the adjacent battery rows are arranged in a staggered manner. The first baffle portion and the first connecting portion are respectively located at one end of two adjacent battery rows away from the connecting hole.

[0018] In one embodiment, the sandwich bracket includes a sandwich plate and a second baffle plate connected to the sandwich plate, the connecting hole is located at an end of the battery box away from the water inlet, the second baffle plate is located between the multiple connecting holes and the multiple mounting holes, the sandwich bracket and the bottom bracket enclose the first liquid cooling cavity, and the second baffle plate is provided with a second drainage hole connecting the first liquid cooling cavity and the multiple connecting holes.

[0019] In one embodiment, the second baffle plate includes at least two second baffles and a second connecting portion connecting the two second baffles, the second baffle protrudes into an arc shape in a direction away from the battery, and a plurality of second drainage holes are provided and are respectively located at the second baffles and the second connecting portion;

[0020] The plurality of batteries are arranged into a plurality of battery rows, and the adjacent battery rows are arranged in a staggered manner. The second current blocking portion and the second connecting portion are located at one end of two adjacent battery rows close to the connecting hole.

[0021] In one embodiment, a receiving groove is provided on the upper surface of the sandwich bracket for accommodating the colloid, part of the side wall of the receiving groove surrounds the plurality of mounting holes, and the height of the side wall of the receiving groove surrounding the mounting holes is smaller than the height of the other side walls of the receiving groove.

[0022] In a second aspect, an embodiment of the utility model provides a vehicle, comprising a battery pack as described above, and also comprising a BMS battery management system for monitoring and collecting signals of the battery pack.

[0023] Beneficial effects of the embodiments of the utility model:

[0024] In an embodiment of the utility model, the heat exchange area between the liquid cooling medium and the battery is increased by immersing part of the battery in the liquid cooling chamber, and the liquid cooling chamber is further divided into a first liquid cooling chamber and a second liquid cooling chamber by a sandwich bracket and connected through a connecting hole. The sandwich bracket can increase the heat transfer and heat conduction speed in the liquid cooling chamber, so that the coolant and the battery can fully exchange heat, thereby improving the technical problem of poor battery temperature uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a three-dimensional schematic diagram of a battery box provided by an embodiment of the utility model.

[0027] Figure 2 It is an exploded view of a battery box provided in an embodiment of the utility model.

[0028] Figure 3 It is an exploded view of a battery pack provided in an embodiment of the present utility model.

[0029] Figure 4 It is a top view of multiple battery rows provided by an embodiment of the utility model.

[0030] Figure 5 It is a three-dimensional schematic diagram of a sandwich bracket provided in an embodiment of the utility model.

[0031] Figure 6 It is a structural schematic diagram of a bottom bracket and a battery provided in an embodiment of the utility model.

[0032] Figure 7 It is an exploded view of the sandwich bracket and the bottom bracket provided in the embodiment of the utility model.

[0033] Figure 8 It is a three-dimensional schematic diagram of a top bracket provided in an embodiment of the utility model.

[0034] Fig. 9 It is an assembly diagram of a top support assembly, a sandwich support assembly, a bottom support assembly and a battery provided in an embodiment of the utility model.

[0035] Fig.10 It is an exploded view of the top bracket and the sandwich bracket provided in the embodiment of the utility model.

[0036] Fig.11 It is a bottom view of the sandwich bracket provided in the embodiment of the utility model. Description of the drawings:

[0038] 1. Bottom bracket; 11. Bottom plate; 12. Bottom side plate; 121. Water inlet; 13. First baffle plate; 131. First baffle part; 132. First connecting part; 133. First drainage hole; 2. Top bracket; 21. Top plate; 211. Glue injection groove; 212. Avoidance hole; 22. Top side plate; 221. Water outlet; 23. End plate; 3. Sandwich bracket; 31. Sandwich plate; 311. Mounting hole; 312. Receiving groove; 313. Connecting hole; 32. Second baffle plate; 321. Second baffle part; 322. Second connecting part; 323. Second drainage hole; 4. First liquid cooling chamber; 5. Second liquid cooling chamber; 6. Battery row; 61. First row; 62. Second row; 63. Battery; 7. CCS assembly; 8. Battery frame; 9. Upper cover; 10. Lower cover. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0040] Example 1

[0041] Reference Figure 1 , Figure 2 and Figure 3 , a battery pack provided in an embodiment of the present application includes:

[0042] A bottom bracket assembly, comprising a bottom bracket 1;

[0043] A top bracket assembly, comprising a top bracket 2 disposed above the bottom bracket 1, wherein the top bracket 2 and the bottom bracket 1 enclose a liquid cooling chamber;

[0044] A sandwich bracket assembly, comprising a sandwich bracket 3 located between a bottom bracket 1 and a top bracket 2, wherein the sandwich bracket 3 is provided with a plurality of mounting holes 311; and

[0045] A plurality of batteries 63 are disposed in corresponding mounting holes 311;

[0046] Among them, the interlayer bracket 3 divides the liquid cooling cavity into a first liquid cooling cavity 4 and a second liquid cooling cavity 5 located above the first liquid cooling cavity 4. The interlayer bracket 3 is provided with a connecting hole 313 connecting the first liquid cooling cavity 4 and the second liquid cooling cavity 5. At least part of the battery 63 is located in the first liquid cooling cavity 4 and the second liquid cooling cavity 5.

[0047] At least part of the battery 63 is immersed in the liquid cooling cavity surrounded by the bottom bracket 1 and the top bracket 2, so that the battery 63 can contact the refrigerant with a larger area, thereby improving the heat dissipation effect. At the same time, the sandwich bracket 3 further divides the liquid cooling cavity into a first liquid cooling cavity 4 and a second liquid cooling cavity 5 arranged up and down, and connects them through the connecting hole 313. The sandwich bracket 3 is used to accelerate the heat conduction speed of the refrigerant, thereby improving the heat dissipation efficiency of the battery 63.

[0048] Example 2

[0049] Reference Figure 1 , Figure 2 and Figure 3 A battery pack provided in an embodiment of the present application includes a bottom support assembly, a top support assembly, a sandwich support assembly, and a plurality of batteries 63.

[0050] Reference Figure 3 , Figure 4 and Figure 5 The bottom bracket assembly includes a bottom bracket 1. The top bracket assembly includes a top bracket 2. The top bracket 2 is arranged above the bottom bracket 1 and forms a liquid cooling cavity with the bottom bracket 1. The sandwich bracket assembly includes a sandwich bracket 3 located between the bottom bracket 1 and the top bracket 2 to separate the liquid cooling cavity into a first liquid cooling cavity 4 and a second liquid cooling cavity 5 located above the first liquid cooling cavity 4. The sandwich bracket 3 is provided with a plurality of mounting holes 311.

[0051] The multiple batteries 63 are arranged into multiple battery rows 6, and the adjacent battery rows 6 are arranged in a staggered manner. The multiple batteries 63 are arranged in the corresponding mounting holes 311 and are sealed and connected to the hole walls of the mounting holes 311.

[0052] The sandwich bracket 3 is also provided with a plurality of connecting holes 313. The plurality of connecting holes 313 are located at one end of the plurality of mounting holes 311, that is, one end of the battery pack. The plurality of connecting holes 313 connect the first liquid cooling chamber 4 and the second liquid cooling chamber 5.

[0053] The battery pack further comprises a battery frame 8 and an upper cover 9 and a lower cover 10 arranged opposite to each other. The bottom support assembly, the sandwich support assembly and the top support assembly are connected between the upper cover 9 and the lower cover 10 and are located in the battery frame 8.

[0054] Reference Figure 6 and Figure 7 The bottom bracket 1 includes a bottom plate 11, two bottom side plates 12 arranged opposite to each other, and a first baffle plate 13. The two bottom side plates 12 are respectively connected to the two sides of the bottom plate 11, and the first baffle plate 13 is connected between the two bottom side plates 12 and close to one end of the bottom side plate 12. The orthographic projection of the first baffle plate 13 on the sandwich bracket 3 is located at one end of the multiple mounting holes 311 away from the multiple connecting holes 313. The bottom plate 11, the two bottom side plates 12, the first baffle plate 13 and the sandwich bracket 3 form a first liquid cooling chamber 4, and at least part of the battery 63 is located in the first liquid cooling chamber 4. The bottom side plate 12 is provided with a water inlet 121, and the water inlet 121 is located on the side of the first baffle plate 13 away from the multiple battery cells. The first baffle plate 13 is provided with a plurality of first drainage holes 133 connecting the first liquid cooling chamber 4 and the water inlet 121.

[0055] Reference Figure 8 and Fig. 9The top bracket 2 includes a top plate 21 arranged opposite to the bottom plate 11, two top side plates 22 arranged opposite to each other, and two end plates 23 arranged opposite to each other and connected between the two top side plates 22. The top plate 21, the two top side plates 22, the two end plates 23 and the interlayer bracket 3 form a second liquid cooling chamber 5, and at least part of the multiple batteries 63 are located in the second liquid cooling chamber 5. A top side plate 22 is provided with a water outlet 221. Therefore, the flow direction of the coolant in the battery pack is from the water inlet 121 into the first liquid cooling chamber 4, and passes through the connecting hole 313 and the second liquid cooling chamber 5 in turn, and finally flows out from the water outlet 221. Realizing regional cooling and heat dissipation of the battery 63 is conducive to ensuring that at least part of each battery 63 can be exposed to coolant with a lower temperature, improving the cooling effect, and enhancing the uniformity of the temperature of the battery 63.

[0056] The top plate 21 is provided with a plurality of avoidance holes 212 corresponding to the plurality of mounting holes 311. The upper end of the battery 63 extends out through the corresponding avoidance holes 212 to facilitate the connection of the CCS assembly 7. A glue injection groove 211 is provided on the surface of the top plate 21 away from the sandwich bracket 3. The glue injection groove 211 is used to receive the colloid to achieve a seal between the battery 63 and the hole wall of the avoidance hole 212. Part of the side wall of the glue injection groove 211 surrounds the side wall of the plurality of avoidance holes 212. The height of the side wall of the glue injection groove 211 surrounding the avoidance hole 212 is lower than the other side walls of the glue injection groove 211.

[0057] Reference Fig. 9 The water outlet 221 is located directly above the water inlet 121, that is, the water inlet 121 and the water outlet 221 are both located at the end of the battery pack away from the connecting hole 313. This is beneficial to promote the flow of the coolant in the first liquid cooling chamber 4 and the second liquid cooling chamber 5, improve the fluidity of the coolant, and make the coolant after heat exchange flow out in time as much as possible, thereby improving the cooling efficiency.

[0058] Reference Fig. 9 The first baffle plate 13 includes a plurality of first baffle portions 131 and a first connecting portion 132 connecting adjacent first baffle portions 131. The first baffle portions 131 are convex in an arc shape in a direction away from the battery 63, and the first baffle portions 131 and the second connecting portion 322 are respectively located at one end of the adjacent battery row 6 away from the connecting hole 313. The first baffle plate 13 and the first connecting portion 132 are both provided with a first drainage hole 133.

[0059] Reference Fig.10 The sandwich bracket 3 includes a sandwich plate 31 and a second baffle plate 32 connected to the sandwich plate 31. A plurality of mounting holes 311 and a plurality of connecting holes 313 are provided on the sandwich plate 31. The second baffle plate 32 is provided between the plurality of mounting holes 311 and the plurality of connecting holes 313. A plurality of second drainage holes 323 are provided on the second baffle plate 32. The plurality of second drainage holes 323 are connected to the first liquid cooling chamber 4 and the plurality of connecting holes 313.

[0060] Reference Figure 4 , Figure 5 , Fig.10 and Fig.11 , the multiple battery rows 6 include multiple first rows 61 and multiple second rows 62. The distance between one end of the multiple first rows 61 close to the multiple connecting holes 313 and one end of the sandwich plate 31 away from the water inlet 121 is smaller than the distance between one end of the multiple second rows 62 close to the multiple connecting holes 313 and one end of the sandwich plate 31 away from the water inlet 121. According to the different distances between the battery rows 6 and the end of the sandwich plate 31 close to the connecting holes 313, the multiple connecting holes 313 are set to different sizes, specifically: the area of ​​the connecting holes 313 at one end of the first row 61 is smaller than the area of ​​the connecting holes 313 at one end of the second row 62.

[0061] The distances between the first rows 61 and one end of the sandwich plate 31 close to the connecting hole 313 are the same. The distances between the second rows 62 and one end of the sandwich plate 31 close to the connecting hole 313 are the same or different. In this embodiment, two second rows 62 are arranged adjacent to each other, and the other second rows 62 are arranged at intervals from the first rows 61.

[0062] There are spacings between adjacent battery rows 6 , there are spacings between the batteries 63 in the battery rows 6 , and there are spacings between the first baffle plate 13 and the second baffle plate 32 and the battery rows 6 , so as to facilitate the coolant to flow into the multiple battery rows 6 .

[0063] Reference Fig.11 The second baffle plate 32 includes a plurality of second baffles 321 and a second connecting portion 322 connecting adjacent second baffles 321, and the second baffles 321 are convex in an arc shape in a direction away from the battery 63. The second baffles 321 and the second connecting portion 322 are located at one end of the adjacent battery row 6 close to the connecting hole 313. The plurality of second baffles 321 and the plurality of connecting portions are each provided with a second drainage hole 323.

[0064] The first baffle 131 near the water inlet 121 is used to prevent the coolant flowing into the water inlet 121 from quickly flowing through the battery row 6 near the water inlet 121, and at the same time, multiple first baffles 131 can have the function of balancing the flow between the battery rows 6. The first drainage hole 133 penetrates the first baffle plate 13 along the direction from the bottom plate 11 to the sandwich plate 31, expanding the area of ​​the first drainage hole 133 and reducing the obstruction of the upper part of the first baffle plate 13 to the coolant.

[0065] The second baffle 321 serves to balance the flow through the multiple connecting holes 313. The second diversion hole 323 penetrates the second baffle plate 32 along the direction from the sandwich plate 31 to the bottom plate 11, thereby expanding the area of ​​the second diversion hole 323 and reducing the obstruction of the lower part of the second baffle plate 32 to the coolant.

[0066] In other embodiments, the water inlet 121 and the water outlet 221 are respectively located at two ends of the battery case, and the multiple connecting holes are located at an end of the battery case away from the water inlet 121 or the water outlet 221. When the multiple connecting holes are located at an end of the battery case close to the water inlet 121, it is necessary to cancel the setting of the first baffle plate 13 and the second baffle plate 32 to facilitate the flow of coolant in the first liquid cooling chamber.

[0067] Reference Figure 5 , the upper surface of the sandwich plate 31, that is, the surface of the sandwich plate 31 facing away from the bottom plate 11, is provided with a receiving groove 312, and part of the side walls of the receiving groove 312 surround the multiple mounting holes 311, and the receiving groove 312 is used to accommodate the colloid. The height of the side walls of the receiving groove 312 surrounding the mounting holes 311 is less than the height of the other side walls of the receiving groove 312, so that when the colloid is injected into the receiving groove 312, the side walls of the receiving groove 312 surrounding the mounting holes 311 can prevent the colloid from quickly passing through the mounting holes 311 and flowing into the first liquid cooling chamber 4. When the amount of colloid injected is higher than the side walls of the receiving groove 312 surrounding the mounting holes 311, part of the colloid can penetrate between the battery 63 and the hole wall of the mounting hole 311 to play a sealing role, preventing the coolant in the first liquid cooling chamber 4 from directly flowing from the mounting holes 311 into the second liquid cooling chamber 5, so as to avoid affecting the originally set coolant flow path. At the same time, the side wall of the receiving groove 312 surrounding the mounting hole 311 can also increase the adhesion area of ​​the colloid, so as to better achieve the sealing between the battery 63 and the hole wall of the mounting hole 311.

[0068] An embodiment of the present application also provides a vehicle, comprising the above-mentioned battery pack and a BMS battery management system for monitoring and collecting battery pack signals.

[0069] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, characterized in that: include: A bottom bracket assembly, comprising a bottom bracket (1); A top bracket assembly, comprising a top bracket (2) arranged above the bottom bracket (1), wherein the top bracket (2) and the bottom bracket (1) form a liquid cooling chamber; A sandwich bracket assembly, comprising a sandwich bracket (3) located between the bottom bracket (1) and the top bracket (2), wherein the sandwich bracket (3) is provided with a plurality of mounting holes (311); and A plurality of batteries (63) are arranged in corresponding mounting holes (311); The interlayer support (3) divides the liquid cooling cavity into a first liquid cooling cavity (4) and a second liquid cooling cavity (5) located above the first liquid cooling cavity (4); the interlayer support (3) is provided with a connecting hole (313) connecting the first liquid cooling cavity (4) and the second liquid cooling cavity (5); at least part of the battery (63) is located in the first liquid cooling cavity (4) and the second liquid cooling cavity (5).

2. The battery pack according to claim 1, characterized in that: The bottom bracket (1) is provided with a water inlet (121) connected to the first liquid cooling chamber (4), and the top bracket (2) is provided with a water outlet (221) connected to the second liquid cooling chamber (5), the water inlet (121) and the water outlet (221) are both located at one end of the battery case or at two ends of the battery case respectively, and the connecting hole (313) is located at one end of the battery case away from the water inlet (121) and / or the water outlet (221).

3. The battery pack according to claim 2, characterized in that: A plurality of the communicating holes (313) are provided, and the plurality of communicating holes (313) are located at one end of the plurality of mounting holes (311).

4. The battery pack according to claim 3, characterized in that: The plurality of batteries (63) are arranged into a plurality of battery rows (6), and the plurality of battery rows (6) include a plurality of first rows (61) and a plurality of second rows (62); The water inlet (121) and the water outlet (221) are both located at one end of the battery case, and the connecting hole (313) is located at the other end of the battery case. The distance between at least one end of the first row (61) close to the multiple connecting holes (313) and one end of the sandwich bracket (3) away from the water inlet (121) is smaller than the distance between the corresponding end of the second row (62) close to the multiple connecting holes (313) and one end of the sandwich bracket (3) away from the water inlet (121). The area of ​​the connecting hole (313) located at one end of the first row (61) is smaller than the area of ​​the connecting hole (313) located at one end of the second row (62).

5. The battery pack according to claim 2, characterized in that: The bottom bracket (1) comprises a bottom plate (11), a bottom side plate (12) connected to the side of the bottom plate (11), and a first baffle plate (13) connected to the bottom side plate (12); the first baffle plate (13) is close to the end of the bottom side plate (12); the orthographic projection of the first baffle plate (13) on the sandwich bracket (3) is located at an end of the plurality of mounting holes (311) away from the connecting hole (313); at least part of the battery (63) is located between the bottom side plate (12), the bottom plate (11) and the first baffle plate (13); the water inlet (121) is provided on the bottom side plate (12) and on a side of the first baffle plate (13) away from the battery (63); the first baffle plate (13) is provided with a first drainage hole (133) connecting the water inlet (121) and the first liquid cooling chamber (4).

6. The battery pack according to claim 5, characterized in that: The first baffle plate (13) comprises at least two first baffle portions (131) and a first connecting portion (132) connecting the two first baffle portions (131), the first baffle portion (131) protruding into an arc shape in a direction away from the battery (63), and a plurality of first drainage holes (133) are provided and are respectively located on the first baffle portion (131) and the first connecting portion (132); The plurality of batteries (63) are arranged into a plurality of battery rows (6), and the adjacent battery rows (6) are arranged in a staggered manner. The first baffle portion (131) and the first connection portion (132) are respectively located at one end of two adjacent battery rows (6) away from the connecting hole (313).

7. The battery pack according to any one of claims 2 to 6, characterized in that: The sandwich bracket (3) comprises a sandwich plate (31) and a second baffle plate (32) connected to the sandwich plate (31); the connecting hole (313) is located at an end of the battery box body away from the water inlet (121); the second baffle plate (32) is located between a plurality of the connecting holes (313) and a plurality of the mounting holes (311); the sandwich bracket (3) and the bottom bracket (1) enclose the first liquid cooling cavity (4); the second baffle plate (32) is provided with a second drainage hole (323) connecting the first liquid cooling cavity (4) and the plurality of the connecting holes (313).

8. The battery pack according to claim 7, characterized in that: The second baffle plate (32) comprises at least two second baffle portions (321) and a second connecting portion (322) connecting the two second baffle portions (321), the second baffle portion (321) bulging into an arc shape in a direction away from the battery (63), and a plurality of second drainage holes (323) are provided and are respectively located on the second baffle portion (321) and the second connecting portion (322); The plurality of batteries (63) are arranged into a plurality of battery rows (6), and adjacent battery rows (6) are arranged in a staggered manner. The second baffle (321) and the second connection portion (322) are located at one end of two adjacent battery rows (6) close to the connecting hole (313).

9. The battery pack according to claim 1, characterized in that: The upper surface of the sandwich bracket (3) is provided with a receiving groove (312) for accommodating colloid, part of the side wall of the receiving groove (312) surrounds the plurality of mounting holes (311), and the height of the side wall of the receiving groove (312) surrounding the mounting holes (311) is smaller than the height of the other side walls of the receiving groove (312).

10. A vehicle, comprising a battery pack according to any one of claims 1 to 9, characterized in that: It also includes a BMS battery management system for monitoring and collecting battery pack signals.

Images