Overflow battery assembly

Abstract

The utility model discloses an overflow type battery assembly. The overflow type battery assembly comprises a bottom plate and a battery module arranged on the bottom plate, the battery module comprises an end pressing plate and a battery pack, the battery pack comprises a plurality of single batteries, and the single batteries are arranged in n columns in the X direction and arranged in m rows in the Y direction; an inter-row gap channel is arranged between every two adjacent rows of battery monomers; an inter-column gap channel is arranged between two adjacent columns of battery monomers; the two end pressing plates are respectively positioned on the front end surface and the rear end surface, vertical to the Y direction, of the battery pack; the two end pressing plates are used for sealing the two ends of the inter-row gap channel, sealing strips are arranged at the two ends of the inter-row gap channel respectively, and the inter-row gap channel and the inter-row gap channel with the two closed ends form a temperature control channel used for circulation of a temperature control medium. The side wall or the upper end of the temperature control channel is provided with an overflow liquid outlet, the bottom plate is provided with a liquid inlet and a liquid inlet flow dividing channel used for distributing temperature control media to the line gap channels and the column gap channels, and the liquid inlet is communicated with the liquid inlet flow dividing channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric energy storage, and specifically relates to a flooded battery assembly. Background Art

[0002] At present, with the continuous improvement of my country's energy consumption structure, the energy storage battery industry has shown explosive development, and the safety and stability of energy storage systems have attracted more and more attention. In the process of charging and discharging, energy storage batteries will generate a lot of heat due to the existence of ohmic heat and polarization heat. If this heat cannot be diffused in time, on the one hand, it will accumulate inside the battery and increase the speed of the side reactions at the interface of the energy storage battery. On the other hand, excessive heat accumulation may cause thermal runaway of the battery. Therefore, efficient heat dissipation measures must be considered in the design of energy storage batteries.

[0003] At present, there are two main heat dissipation methods for energy storage systems: air cooling and liquid cooling. Among them, air cooling is mainly refrigerated by air conditioning, the cooling medium is air, the energy efficiency ratio is low, the equipment occupies a large area, and the temperature consistency of the energy storage battery is poor. Liquid cooling uses a cooling plate with water as the cooling medium. The heat is exchanged between the cooling medium flowing in the cooling plate and the energy storage battery. The heat needs to pass through the battery shell and the cooling plate and finally transferred to the cooling medium, and then the cooling medium dissipates the heat through the radiator. There are many heat transfer links, large thermal resistance, low heat exchange efficiency, and high requirements for radiator performance.

[0004] In order to improve the temperature control performance of energy storage systems, energy storage systems that use immersion heat dissipation are gaining more and more attention. Immersion energy storage systems immerse energy storage batteries in temperature control media and use heat exchange between the temperature control media and the energy storage batteries to achieve heat dissipation. However, most existing immersion energy storage systems use static immersion. After the energy storage system has been running for a long time, the temperature will gradually rise due to the gradual accumulation of local heat in the temperature control medium, causing safety risks. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an overflow type battery assembly, which allows the temperature control medium to flow by overflow to improve the temperature control performance and operation safety performance.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A flooded battery assembly comprises a base plate and a battery module mounted on the base plate;

[0008] The battery module includes an end pressure plate and a battery pack, the battery pack includes a plurality of battery cells, the battery cells are arranged in n columns along the X direction and in m rows along the Y direction; when n≥1 and m≥2, an inter-row gap channel is provided between the battery cells in two adjacent rows; when n≥2 and m≥1, an inter-column gap channel is provided between the battery cells in two adjacent columns; the end pressure plates are provided in two pieces, and the two end pressure plates are respectively located on the front end surface and the rear end surface of the battery pack perpendicular to the Y direction; the two end pressure plates are used to seal the two ends of the inter-column gap channel, and the two ends of the inter-row gap channel are respectively provided with sealing strips, and the inter-row gap channel and the inter-column gap channel with closed ends form a temperature control channel for the circulation of a temperature control medium;

[0009] The side wall or upper end of the temperature control channel is provided with an overflow outlet, the bottom plate is provided with a liquid inlet and a liquid inlet shunt channel for distributing temperature control medium to the inter-row gap channel and the inter-column gap channel, and the liquid inlet is connected to the liquid inlet shunt channel.

[0010] Furthermore, an upper hoop and a lower hoop are respectively provided at the upper and lower ends of the battery pack, the upper hoop is clamped around the upper part of the battery pack, and the lower hoop is clamped around the lower part of the battery pack.

[0011] Furthermore, the top of the upper hoop is provided with an upper baffle located on the top surface of the battery pack and surrounding the edges of the top surface of the battery pack, and the bottom of the lower hoop is provided with a lower baffle located on the bottom surface of the battery pack and surrounding the edges of the bottom surface of the battery pack.

[0012] Furthermore, the upper hoop and the lower hoop are fixedly connected to the end pressure plates respectively.

[0013] Furthermore, connecting screws are respectively provided at both ends of the end pressure plate, and the connecting screws penetrate the upper baffle plate and the lower baffle plate to respectively connect and fix the upper hoop and the lower hoop to the end pressure plate.

[0014] Furthermore, the lower hoop is provided with a support bar located on the bottom surface of the battery pack for supporting the battery cell.

[0015] Furthermore, a connecting piece is provided on the lower hoop, and a lifting hole is provided on the connecting piece.

[0016] Furthermore, the connecting member is provided with a mounting plate, and the mounting plate is provided with a mounting hole.

[0017] Furthermore, the number of the connecting members is four and they are respectively located on both sides of the front end surface and the rear end surface of the battery pack.

[0018] Furthermore, gaskets are arranged between the battery cells, and gaps are provided between the gaskets for the temperature control medium to flow in vertical and horizontal directions.

[0019] Furthermore, the liquid inlet diversion channel includes at least one diversion channel parallel to each other, and liquid inlet diversion ports connected to the temperature control channel are provided at intervals on the side walls of the diversion channel; when the diversion channel is set to one, the liquid inlet is connected to the diversion channel; when the diversion channel is set to at least two, the liquid inlet diversion channel includes a distribution channel perpendicular to the diversion channel, and all the diversion channels are connected to the distribution channel.

[0020] Furthermore, a first rough element for diverting the temperature control medium is provided in the distribution channel; the first rough element enables the temperature control medium in the distribution channel to enter the diverting channel according to a set flow ratio.

[0021] Further, the diversion channel is set to be one, and the diversion channel is located in the middle of the bottom plate; or, the diversion channels are set to be two, and the two diversion channels are respectively located on both sides of the bottom plate; or, the diversion channels are set to be at least three, all of the diversion channels are arranged at intervals on the bottom plate, and two of the diversion channels are located on both sides of the bottom plate.

[0022] Furthermore, a second rough element for guiding the temperature control medium is provided on the bottom plate corresponding to the diversion channel.

[0023] Furthermore, the density of the second rough elements gradually decreases in a direction away from the diversion channel.

[0024] Furthermore, the shunt channel is a groove arranged on the bottom plate; a lower hoop is provided at the lower end of the battery pack, and a cover plate is provided on the lower hoop, which is located on the bottom surface of the battery pack and corresponds to the shunt channel.

[0025] The beneficial effects of the utility model are:

[0026] The overflow type battery assembly of the utility model is configured such that a battery cell array is arranged into n rows and m columns, and an inter-row gap channel is arranged between two adjacent rows of battery cells and an inter-column gap channel is arranged between two adjacent columns of battery cells, wherein both ends of the inter-column gap channel are sealed by end pressure plates respectively, and both ends of the inter-row gap channel are sealed by sealing strips respectively, so that a temperature control channel located between two adjacent rows and two adjacent columns of battery cells can be formed in the battery pack; after the temperature control medium is injected into the liquid inlet shunt channel through the liquid inlet, the temperature control medium is shunted to each inter-row gap channel and inter-column gap channel by the liquid inlet shunt channel, and finally flows out through the overflow outlet arranged on the side wall or top of the temperature control channel, so that the temperature control medium exchanges heat with the battery cells during the flow in the temperature control channel, thereby avoiding the problem of excessive temperature rise of the temperature control medium caused by the existing static immersion method, and effectively improving the temperature control performance and operation safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model is described with the following drawings:

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the flooded battery assembly of the utility model, specifically a schematic diagram of the structure after the protective plate is hidden;

[0029] Figure 2 is a side view of the flooded battery assembly of this embodiment;

[0030] Figure 3 for Figure 2 AA section view;

[0031] Figure 4 is a structural schematic diagram of the upper hoop;

[0032] Figure 5 is a schematic diagram of the structure of the lower hoop;

[0033] Figure 6 is a schematic diagram of the structure of the bottom plate, specifically a schematic diagram of the structure when there is one diversion channel;

[0034] Figure 7 is a schematic diagram of the structure of the bottom plate, specifically a schematic diagram of the structure when there are two diversion channels;

[0035] Figure 8 for Figure 7 A schematic diagram of the structure behind the cover plate that hides the distribution channel;

[0036] Fig. 9 is a schematic diagram of the structure of the bottom plate, specifically a schematic diagram of the structure when there are three diversion channels;

[0037] Fig.10 for Figure 6 A magnified view of area B;

[0038] Fig.11 It is a three-dimensional diagram of the overflow battery assembly of this embodiment.

[0039] Description of reference numerals:

[0040] 10-bottom plate; 11-liquid inlet; 12-diversion channel; 13-liquid inlet diversion port; 14-distribution channel; 15-first rough element; 16-second rough element; 161-support column; 17-liquid inlet pipe;

[0041] 20-battery module; 21-end pressure plate; 22-battery cell; 23-gap channel between rows; 24-gap channel between columns; 25-sealing strip; 26-protection plate; 261-hollow hole; 27-upper hoop; 271-upper baffle; 28-lower hoop; 281-lower baffle; 282-support bar; 283-cover plate; 29-connector; 291-lifting hole; 292-mounting plate; 293-mounting hole; 30-gasket; 31-connecting screw. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0043] like Figure 1-5 As shown, the overflow battery assembly of this embodiment includes a base plate 10 and a battery module 20 mounted on the base plate 10. Specifically, the battery module 20 of this embodiment includes an end pressure plate 21 and a battery pack, and the battery pack includes a plurality of battery cells 22, and the battery cells 22 are arranged in n columns along the X direction and in m rows along the Y direction; when n≥1 and m≥2, an inter-row gap channel 23 is provided between two adjacent rows of battery cells 22; when n≥2 and m≥1, an inter-row gap channel 24 is provided between two adjacent columns of battery cells 22. Specifically, in this embodiment, the battery cells 22 are arranged in 4 columns along the X direction and in 12 rows along the Y direction. In this embodiment, there are two end pressure plates 21, and the two end pressure plates 21 are respectively located on the front end surface and the rear end surface of the battery pack perpendicular to the Y direction. The two end pressure plates 21 are used to seal the two ends of the inter-column gap channel 24, and the two ends of the inter-row gap channel 23 are respectively provided with sealing strips 25. The inter-row gap channels 23 and the inter-column gap channels 24 sealed at both ends form a temperature control channel for the circulation of temperature control medium. Specifically, an overflow outlet is provided on the side wall or the upper end of the temperature control channel, and a liquid inlet 11 and a liquid inlet diversion channel for distributing the temperature control medium to the inter-row gap channels 23 and the inter-column gap channels 24 are provided on the bottom plate 10. The liquid inlet 11 is connected to the liquid inlet diversion channel, and a liquid inlet pipe 17 is connected to the liquid inlet. Specifically, in this embodiment, a protective plate 26 is provided on the top surface of the battery pack, and hollow holes 261 are provided on the protective plate 26 corresponding to the inter-row gap channels 23 and the inter-column gap channels 24. The temperature control medium can overflow directly from the top of the battery pack through the upper end of the temperature control channel, that is, the overflow outlet of this embodiment is located at the upper end of the temperature control channel. Fig.11 As shown, the protection plate 26 of this embodiment is provided corresponding to each column of battery cells 22, and a hollow hole 261 corresponding to the inter-column gap channel 24 is provided between two adjacent protection plates 26, and a hollow hole 261 is provided on the protection plate 26 corresponding to the inter-row gap channel 23. Of course, in some other embodiments, the protection plate 26 can also be provided as a whole, which will not be described in detail.

[0044] In some embodiments, an overflow guide assembly may be provided on the top surface of the battery pack to allow the temperature control medium to overflow from a set position on the top of the battery pack. At the same time, the guide assembly controls the height of the temperature control medium submerging the top surface of the battery pack, which will not be described in detail. In other embodiments, the overflow guide assembly may be provided on an external structure that cooperates with the overflow-type battery assembly of the present embodiment, such as providing the overflow guide assembly on an energy storage compartment that cooperates with the overflow-type battery assembly of the present embodiment, which will not be described in detail. In other embodiments, the overflow outlet may also be provided on the side of the temperature control channel, such as providing an overflow port corresponding to the inter-column gap channel on the end pressure plate, or providing an overflow port corresponding to the inter-row gap channel on the sealing strip, or controlling the height of the sealing strip to allow the temperature control medium to overflow from above the sealing strip, etc., which will not be described in detail.

[0045] Furthermore, in this embodiment, an upper hoop 27 and a lower hoop 28 are respectively provided at the upper and lower ends of the battery pack, the upper hoop 27 is clamped around the upper part of the battery pack, and the lower hoop 28 is clamped around the lower part of the battery pack. In order to achieve the installation positioning between the upper hoop 27 and the battery pack, in this embodiment, an upper baffle 271 is provided on the top of the upper hoop 27, which is located on the top surface of the battery pack and surrounds the edges of the top surface of the battery pack. The installation positioning between the upper hoop 27 and the battery pack is achieved through the limiting relationship between the upper baffle 271 and the top surface of the battery pack, as shown in FIG. Figure 4 Similarly, in order to achieve the installation and positioning between the lower hoop 28 and the battery pack, in this embodiment, a lower baffle 281 is provided at the bottom of the lower hoop 28, which is located on the bottom surface of the battery pack and surrounds the edges of the bottom surface of the battery pack. The installation and positioning between the lower hoop 28 and the battery pack is achieved through the limiting relationship between the lower baffle 281 and the top surface of the battery pack, as shown in FIG. Figure 5 As shown. By providing the upper hoop 27 and the lower hoop 28, not only can the battery pack be tightened so that there is a set pressure between the battery cells 22, but also a larger pressure area can be left on the end pressure plate 21, which is convenient for the battery pack to be assembled and pressurized through the end pressure plate 21. In this embodiment, the upper hoop 27 and the lower hoop 28 are fixedly connected to the end pressure plate 21 respectively. Specifically, connecting screws 31 are respectively provided at both ends of the end pressure plate 21, and the connecting screws 31 pass through the upper baffle 271 and the lower baffle 281 to respectively connect and fix the upper hoop 27 and the lower hoop 28 to the end pressure plate 21.

[0046] like Figure 5As shown, in a preferred implementation of this embodiment, the lower hoop 28 is provided with a support bar 282 located on the bottom surface of the battery pack for supporting the battery cell, and the support bar 282 is integrated with the lower baffle 281. The lower hoop 28 is provided with a connector 29, and the connector 29 is provided with a hoisting hole 291, through which the battery assembly can be conveniently hoisted. The connector 29 of this embodiment is provided with a mounting plate 292, and the mounting plate 292 is provided with a mounting hole 293, so as to facilitate connection and fixation with the external structure. In this embodiment, the connector 29 is welded and fixed to the lower hoop 28 or is integrally provided, and four connectors 29 are provided and are respectively located on both sides of the front end face and the rear end face of the battery pack.

[0047] like Figure 3 As shown, in the preferred implementation of this embodiment, gaskets 30 are arranged between the battery cells 22, and there are gaps between the gaskets 30 for the temperature control medium to flow in the vertical and horizontal directions. By providing the gaskets 30, on the one hand, an inter-row gap channel 23 can be formed between two adjacent rows of battery cells 22 and an inter-column gap channel 24 can be formed between two adjacent columns of battery cells 22. On the other hand, it is also used to withstand the pressure between two adjacent battery cells 22. The gasket 30 has various structural forms. For example, the gasket 30 can be in the shape of a triangle, a rhombus, a circle, an ellipse, etc. The gasket 30 of this embodiment adopts a rhombus structure, which will not be repeated. The position distribution and area proportion of the gasket 30 on the surface of the battery cell 22 are set according to the pressure it bears and the fluidity of the temperature control medium.

[0048] like Figure 6-10 As shown, in this embodiment, the liquid inlet shunt channel includes at least one shunt channel 12 parallel to each other, and the side wall of the shunt channel 12 is provided with a liquid inlet shunt port 13 connected to the internal channel. The position and number of the shunt channels 12 are set according to the actual application scenario, such as the row and column arrangement of the battery cells 22 in the battery pack. Specifically, the shunt channel 12 can be set in the X direction or in the Y direction. When the shunt channel 12 is set to one, the liquid inlet 11 is connected to the shunt channel 12, such as Figure 6 As shown, the flow diversion channel 12 is located in the middle of the bottom plate. When there are at least two flow diversion channels 12, the liquid inlet flow diversion channel includes a distribution channel 14 perpendicular to the flow diversion channel 12, and all flow diversion channels 12 are connected to the distribution channel 14. Figure 7-8 As shown, the diversion channels 12 are provided in two numbers, and the two diversion channels 12 are respectively located on both sides of the bottom plate. Of course, the diversion channels 12 can also be provided in three numbers or more, such as Fig. 9As shown, there are three shunt channels, all of which are arranged at intervals on the bottom plate 10, and two of the shunt channels 12 are located on both sides of the bottom plate 10. The liquid inlet shunt port 13 is arranged along the shunt channel 12, and the flow area of ​​the liquid inlet shunt port 13 gradually increases or decreases in the direction close to the liquid inlet port 11. Of course, the flow area of ​​the liquid inlet shunt port 13 can also be kept equal in the direction close to the liquid inlet port 11; specifically, the change rule of the flow area of ​​the liquid inlet shunt port 13 is set according to the actual application scenario, such as the liquid inlet pressure of the temperature control medium, the viscosity of the temperature control medium, etc.

[0049] Specifically, when there are at least two flow diversion channels 12, a first rough element 15 for diverting the temperature control medium is provided in the distribution channel 14; the first rough element 15 enables the temperature control medium in the distribution channel 14 to enter the corresponding flow diversion channels 12 according to a set flow ratio, such as Figure 7-9 In the preferred implementation of this embodiment, second rough elements 16 for guiding the temperature control medium are provided on the bottom plate 10 corresponding to the shunt channels 12. Specifically, when the number of shunt channels 12 is large and the spacing between adjacent shunt channels 12 is small, the second rough elements 16 are evenly arranged on the bottom plate 10, such as Fig. 9 When there is only one shunt channel 12 or the spacing between two adjacent shunt channels 12 is large, the arrangement density of the second rough element 16 gradually decreases in the direction away from the shunt channel 12, such as Figure 7-8 As shown, fewer second rough elements 16 are arranged away from the shunt channel 12 to store more temperature control medium to improve the temperature uniformity performance. Of course, when there is only one shunt channel 12 or the distance between two adjacent shunt channels 12 is large, the second rough elements 16 can also be arranged evenly on the bottom plate, such as Figure 6 In this embodiment, the first rough element 15 and the second rough element 16 are both rectangular protrusions protruding upwards, there is a gap between the top surface of the second rough element 16 and the bottom surface of the battery cell 22, and a support column 161 for supporting the battery cell 22 is provided on the top surface of the second rough element 16, as shown in FIG. Fig.10 shown.

[0050] In this embodiment, in order to facilitate processing and manufacturing, the shunt channel 12 adopts a groove set on the bottom plate 10. At this time, a cover plate 283 located on the bottom surface of the battery pack and corresponding to the shunt channel 12 can be set on the lower hoop 28. When the battery module 20 is installed on the bottom plate 10, the cover plate 283 covers the corresponding shunt channel 12. Specifically, in this embodiment, there are three shunt channels 12. Among the three shunt channels 12, two are located on both sides and are covered by the lower baffle 281 set on the lower hoop 28, and the other is located in the middle. A cover plate 283 is provided in the middle position of the lower hoop 28 corresponding to it.

[0051] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A flooded battery assembly, characterized in that: It includes a base plate and a battery module mounted on the base plate; The battery module includes an end pressure plate and a battery pack, the battery pack includes a plurality of battery cells, the battery cells are arranged in n columns along the X direction and in m rows along the Y direction; when n≥1 and m≥2, an inter-row gap channel is provided between the battery cells in two adjacent rows; when n≥2 and m≥1, an inter-column gap channel is provided between the battery cells in two adjacent columns; the end pressure plates are provided in two pieces, and the two end pressure plates are respectively located on the front end surface and the rear end surface of the battery pack perpendicular to the Y direction; the two end pressure plates are used to seal the two ends of the inter-column gap channel, and the two ends of the inter-row gap channel are respectively provided with sealing strips, and the inter-row gap channel and the inter-column gap channel with closed ends form a temperature control channel for the circulation of a temperature control medium; An overflow outlet is provided on the side wall or the upper end of the temperature control channel, a liquid inlet and a liquid inlet shunt channel for distributing temperature control medium to the inter-row gap channels and the inter-column gap channels are provided on the bottom plate, and the liquid inlet is connected to the liquid inlet shunt channel.

2. The flooded battery assembly according to claim 1, characterized in that: An upper hoop and a lower hoop are respectively disposed at the upper and lower ends of the battery pack, wherein the upper hoop is clamped around the upper portion of the battery pack, and the lower hoop is clamped around the lower portion of the battery pack.

3. The flooded battery assembly according to claim 2, characterized in that: The top of the upper hoop is provided with an upper baffle plate located on the top surface of the battery pack and surrounding the edges of the top surface of the battery pack. The bottom of the lower hoop is provided with a lower baffle plate located on the bottom surface of the battery pack and surrounding the edges of the bottom surface of the battery pack.

4. The flooded battery assembly according to claim 3, characterized in that: The upper hoop and the lower hoop are fixedly connected to the end pressure plates respectively.

5. The flooded battery assembly according to claim 4, characterized in that: Connecting screws are respectively provided at both ends of the end pressure plate, and the connecting screws penetrate the upper baffle plate and the lower baffle plate to respectively connect and fix the upper hoop and the lower hoop to the end pressure plate.

6. The flooded battery assembly according to claim 2, characterized in that: The lower hoop is provided with a support bar located on the bottom surface of the battery pack for supporting the battery cell.

7. The flooded battery assembly according to claim 2, characterized in that: The lower hoop is provided with a connecting piece, and the connecting piece is provided with a hoisting hole.

8. The flooded battery assembly according to claim 7, characterized in that: The connecting piece is provided with a mounting plate, and the mounting plate is provided with a mounting hole.

9. The flooded battery assembly according to claim 7, characterized in that: The connecting members are provided in four numbers and are respectively located on both sides of the front end surface and the rear end surface of the battery pack.

10. The flooded battery assembly according to claim 1, characterized in that: Gaskets are arranged between the battery cells, and gaps are provided between the gaskets for the temperature control medium to flow in vertical and horizontal directions.

11. The flooded battery assembly according to any one of claims 1 to 10, characterized in that: The liquid inlet diversion channel includes at least one diversion channel parallel to each other, and liquid inlet diversion ports connected to the temperature control channel are arranged at intervals on the side walls of the diversion channel; when the diversion channel is set to one, the liquid inlet is connected to the diversion channel; when the diversion channel is set to at least two, the liquid inlet diversion channel includes a distribution channel perpendicular to the diversion channel, and all the diversion channels are connected to the distribution channel.

12. The flooded battery assembly according to claim 11, characterized in that: The distribution channel is provided with a first rough element for diverting the temperature control medium; the first rough element enables the temperature control medium in the distribution channel to enter the diverting channel according to a set flow ratio.

13. The flooded battery assembly according to claim 11, characterized in that: The diversion channel is set to be one, and the diversion channel is located in the middle of the bottom plate; or, the diversion channels are set to be two, and the two diversion channels are respectively located on both sides of the bottom plate; or, the diversion channels are set to be at least three, all of which are arranged on the bottom plate at intervals, and two of the diversion channels are located on both sides of the bottom plate.

14. The flooded battery assembly according to claim 11, characterized in that: The bottom plate is provided with a second rough element corresponding to the diversion channel and used for guiding the temperature control medium.

15. The flooded battery assembly according to claim 14, characterized in that: The density of the second rough elements gradually decreases in a direction away from the branch channel.

16. The flooded battery assembly according to claim 11, characterized in that: The shunt channel is a groove arranged on the bottom plate; a lower hoop is arranged at the lower end of the battery pack, and a cover plate is arranged on the lower hoop, which is located on the bottom surface of the battery pack and corresponds to the shunt channel.

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