Layered overflow type energy storage compartment and energy storage system

Abstract

The utility model discloses a layered overflow type energy storage compartment, which is characterized in that at least one layer of energy storage unit is arranged in an energy storage assembly, and a plurality of single batteries are arranged in each layer of energy storage unit in an array manner, so that internal channels can be formed in the energy storage units through inter-row gap channels and / or inter-column gap channels among the single batteries; the internal channel and the side temperature control channel are separated by arranging the internal partition piece or the side plate, so that the internal channel and the side temperature control channel are independent from each other; the bottom of the internal channel is connected with the unit liquid inlet pipe, and the overflow liquid outlet is formed in the side wall or the top of the internal channel, so that a temperature control medium entering the internal channel through the unit liquid inlet pipe overflows from the overflow liquid outlet through the internal channel; the temperature of the battery monomers in each layer of energy storage unit is controlled by the flowing temperature control medium, so that the temperature control performance and the safety performance can be effectively improved. The utility model further discloses a layered overflow type energy storage system.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric energy storage, and specifically relates to a layered overflow type energy storage compartment and an energy storage system. 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. During the charging and discharging process, 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, it will accumulate inside the battery, which will 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 are an issue that 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 mainly uses air conditioning for refrigeration, and the cooling medium is air. It has low energy efficiency, large equipment footprint, and poor temperature consistency of energy storage batteries. 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 transfer to the cooling medium. The cooling medium then dissipates the heat through the radiator. There are many heat transfer links, large thermal resistance, and low heat exchange efficiency, which leads to higher requirements for radiator performance.

[0004] In order to improve the heat dissipation performance of the energy storage system, the immersion energy storage system that immerses the energy storage battery in a liquid medium has been rapidly developed. The immersion energy storage system immerses the energy storage battery in a liquid medium and uses the heat exchange between the liquid medium and the energy storage battery to achieve heat dissipation. However, most of the existing immersion energy storage systems adopt a static immersion method. After a long period of operation, the temperature will gradually rise due to the gradual accumulation of heat in the liquid medium. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a stratified overflow energy storage compartment, which adopts a combination of stratification and overflow to improve temperature control performance and safety performance.

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

[0007] The utility model firstly proposes a layered overflow type energy storage compartment, comprising a compartment body and an energy storage assembly installed in the compartment body;

[0008] A side channel is provided between the energy storage assembly and the side wall of the compartment, and the side channel passes through the upper and lower ends of the energy storage assembly;

[0009] The energy storage assembly includes at least one layer of energy storage units, and the energy storage unit includes a bottom plate and a battery pack mounted on the bottom plate; the battery pack includes a plurality of battery cells, and 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;

[0010] An internal partition for isolating the side channel is provided in the inter-row gap channel and / or the inter-column gap channel, and the internal partition forms an internal channel independent of the side channel in the battery pack; and / or a side plate for isolating the inter-row gap channel and / or the inter-column gap channel from the side channel is installed on the bottom plate, and the side plate forms an internal channel independent of the side channel in the battery pack;

[0011] A first liquid inlet pipe is provided in the compartment, and a unit liquid inlet pipe is provided on the first liquid inlet pipe in a one-to-one correspondence with each energy storage unit, and the unit liquid inlet pipe is connected to the bottom of the internal channel;

[0012] The side wall or top of the inner channel is provided with an overflow outlet communicated with the side channel.

[0013] Furthermore, the first liquid inlet pipe is located in the vertical direction, and the upper end or the lower end of the first liquid inlet pipe is the liquid inlet end; when the energy storage unit is set to at least two layers, in the two adjacent layers of the energy storage units, the diameter of the unit liquid inlet pipe close to the liquid inlet end is larger than the diameter of the unit liquid inlet pipe far from the liquid inlet end; or, a proportional valve for controlling the liquid inlet flow rate is provided on the unit liquid inlet pipe.

[0014] Furthermore, the side channel surrounds the energy storage assembly.

[0015] Furthermore, a side partition is provided in the side channel, and the side partition divides the side channel into at least one side overflow channel that is independent of each other; or, the side partition divides the side channel into at least one side overflow channel and at least one side temperature control channel that are independent of each other; and the overflow liquid outlet is connected to the side overflow channel.

[0016] Furthermore, a second liquid inlet pipe for injecting a temperature control medium into the side channel is provided in the compartment.

[0017] Further, the second liquid inlet pipe is arranged corresponding to the side overflow channel and the side temperature control channel, the second liquid inlet pipe is used to inject temperature control medium into the corresponding side overflow channel or the side temperature control channel, and the second liquid inlet pipe is provided with a second control valve; or, the second liquid inlet pipe is connected with an overflow liquid inlet pipe for injecting temperature control medium into the side overflow channel and a temperature control liquid inlet pipe for injecting temperature control medium into the side temperature control channel; the overflow liquid inlet pipe is connected with an overflow liquid inlet branch pipe corresponding to the side overflow channel in a one-to-one manner, and the temperature control liquid inlet pipe is connected with a side liquid inlet branch pipe corresponding to the side temperature control channel in a one-to-one manner; the overflow liquid inlet pipe and the temperature control liquid inlet pipe are respectively provided with an overflow liquid inlet control valve and a side liquid inlet control valve; or, the overflow liquid inlet branch pipe and the side liquid inlet branch pipe are respectively provided with an overflow liquid inlet control valve and a side liquid inlet control valve.

[0018] Furthermore, a liquid outlet bin located below the energy storage assembly is provided in the compartment, and a liquid outlet pipe is provided on the liquid outlet bin; the side overflow channel is connected to the liquid outlet bin, and a first liquid outlet pipe is provided between the side temperature control channel and the liquid outlet bin, and a first control valve for controlling the liquid outlet flow rate is provided on the first liquid outlet pipe.

[0019] Furthermore, the side overflow channel is connected to the liquid outlet bin via a first overflow liquid outlet pipe, and the overflow liquid outlet pipe is provided with a first overflow liquid outlet control valve.

[0020] Further, the first liquid outlet pipe and the side temperature control channel are arranged in a one-to-one correspondence, and the first liquid outlet pipe is connected to the bottom of the corresponding side temperature control channel; or, the first liquid outlet pipe is connected to a first liquid outlet branch pipe respectively connected to the bottom of the side temperature control channel.

[0021] Furthermore, a first liquid outlet bin and a second liquid outlet bin are provided in the compartment, and are located below the energy storage assembly. The first liquid outlet bin and the second liquid outlet bin are independently arranged, and liquid outlets are respectively provided on the first liquid outlet bin and the second liquid outlet bin; the side overflow channel is connected to the first liquid outlet bin; the side temperature control channel is connected to the second liquid outlet bin, or a second liquid outlet pipe is provided between the side temperature control channel and the second liquid outlet bin, and a second control valve for controlling the liquid outlet flow rate is provided on the second liquid outlet pipe.

[0022] Furthermore, the side overflow channel is connected to the first liquid outlet bin via a second overflow liquid outlet pipe, and a second overflow liquid outlet control valve is provided on the second overflow liquid outlet pipe.

[0023] Furthermore, the overflow outlet is arranged at the top of the battery pack, and the overflow height of the overflow outlet is higher than the top surface of the corresponding battery pack. A side baffle higher than the overflow outlet is provided on the top surface of the battery pack.

[0024] Furthermore, the bottom plate is provided with a liquid inlet flow distribution channel for distributing the temperature control medium to the inter-row gap channels and the inter-column gap channels.

[0025] Furthermore, the liquid inlet diversion channel includes at least one diversion channel parallel to each other, and liquid inlet diversion ports connected to the internal 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.

[0026] 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.

[0027] 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.

[0028] Furthermore, a second rough element for guiding the temperature control medium is provided on the bottom plate corresponding to the diversion channel.

[0029] Furthermore, the density of the second rough elements gradually decreases in a direction away from the diversion channel.

[0030] Furthermore, the shunt channel is a groove arranged on the bottom plate; and the bottom surface of the battery pack is provided with a cover plate arranged corresponding to the shunt channel.

[0031] Furthermore, a liquid inlet control valve for controlling the liquid inlet flow rate is provided on the unit liquid inlet pipe.

[0032] The utility model also proposes a stratified overflow energy storage system, comprising a temperature control unit, a fire-fighting unit and the stratified overflow energy storage compartment as described above, wherein the temperature control unit comprises a liquid inlet main pipe and a liquid return main pipe, wherein the first liquid inlet pipe is connected to the liquid inlet main pipe; the liquid return main pipe is used to allow the temperature control medium in the energy storage compartment to flow back into the temperature control unit; a temperature control liquid inlet pipe is provided between the liquid outlet of the temperature control unit and the liquid inlet main pipe, a temperature control liquid inlet control valve is provided on the temperature control liquid inlet pipe, and the liquid outlet of the temperature control unit is connected to the liquid return main pipe; a fire-fighting liquid inlet pipe is provided between the liquid outlet of the fire-fighting unit and the liquid inlet main pipe, and a fire-fighting liquid inlet control valve is provided on the fire-fighting liquid inlet pipe.

[0033] The beneficial effects of the utility model are:

[0034] The layered overflow energy storage compartment of the utility model is provided with at least one layer of energy storage units in the energy storage assembly, and a plurality of battery cells are arranged in an array in each layer of energy storage units, so that an internal channel can be formed inside the energy storage unit through the inter-row gap channel provided between two adjacent rows of battery cells and / or the inter-column gap channel between two adjacent columns of battery cells; a side temperature control channel is provided between the energy storage assembly and the compartment, and the internal channel and the side temperature control channel are separated by an internal partition or a side plate, so that the internal channel and the side temperature control channel are independent of each other, so that the internal channel can be used as a temperature control flow channel in the energy storage unit, and the side temperature control channel can be used as a side overflow channel; a unit liquid inlet pipe is connected to the bottom of the internal channel, and an overflow outlet is provided on the side wall or the top of the internal channel, and the temperature control medium entering the internal channel through the unit liquid inlet pipe overflows from the overflow outlet through the internal channel, and the temperature of the battery cells in each layer of the energy storage unit is controlled by the flowing temperature control medium, which can effectively improve the temperature control performance and safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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:

[0036] Figure 1 This is a structural schematic diagram of Embodiment 1 of the layered overflow energy storage compartment of the utility model;

[0037] Figure 2 for Figure 1 AA section view;

[0038] Figure 3 for Figure 1 BB cross-sectional view;

[0039] Figure 4 for Figure 1 CC section view;

[0040] Figure 5 for Figure 1 A magnified view of region D;

[0041] Figure 6 for Figure 4 A magnified view of region E;

[0042] Figure 7 is a schematic diagram of the structure of the bottom plate, specifically a schematic diagram of the structure when there is one diversion channel;

[0043] Figure 8 for Figure 7 A magnified view of the F region;

[0044] Fig. 9 is a schematic diagram of the structure of the bottom plate, specifically a schematic diagram of the structure when there are two diversion channels;

[0045] Fig.10 for Figure 8 A schematic diagram of the structure behind the cover plate that hides the distribution channel;

[0046] Fig.11 is a schematic diagram of the structure of the bottom plate, specifically a schematic diagram of the structure when there are three diversion channels;

[0047] Fig.12 This is a structural schematic diagram of Embodiment 2 of the layered overflow energy storage compartment of the utility model;

[0048] Fig.13 for Fig.12 GG cross-sectional view;

[0049] Fig.14 for Fig.12 HH cross-sectional view;

[0050] Fig.15 for Fig.12 A magnified view of region I;

[0051] Fig.16 for Fig.14 A magnified view of the J region;

[0052] Fig.17 It is a structural schematic diagram of the layered overflow energy storage system of the utility model.

[0053] Description of reference numerals:

[0054] 10-compartment; 11-bottom plate; 11a-liquid inlet; 12-battery monomer; 13-ear; 14-inter-row gap channel; 15-inter-column gap channel; 16-internal partition; 17-first liquid inlet pipe; 18-unit liquid inlet pipe; 18a-proportional valve; 19-overflow liquid outlet; 20-side partition; 21-side overflow channel; 21a-first overflow liquid outlet pipe; 21b-first overflow liquid outlet control valve; 21c-front overflow channel; 21d-rear overflow channel; 22-second liquid inlet pipe; 22a-second control valve; 22b-overflow liquid inlet branch pipe; 22c-side liquid inlet branch pipe; 22d-overflow liquid inlet control valve; 22e-side liquid inlet control valve;

[0055] 23-liquid outlet bin; 24-liquid outlet pipe; 25-liquid outlet control valve; 26-first liquid outlet pipe; 26a-first liquid outlet branch pipe; 27-first control valve; 28-side baffle; 30-left temperature control channel; 31-right temperature control channel; 32-rear temperature control channel; 33-diversion channel; 34-liquid inlet diversion port; 35-distribution channel; 36-first rough element; 37-second rough element; 371-support column;

[0056] 38-first liquid outlet bin; 38a-liquid outlet pipe; 38b-liquid outlet valve; 39-second liquid outlet bin; 39a-liquid outlet pipe; 39b-liquid outlet valve; 40-second overflow liquid outlet pipe; 40a-second overflow liquid outlet control valve;

[0057] 50-temperature control unit; 51-liquid inlet main pipe; 52-liquid return main pipe; 53-temperature control liquid inlet pipe; 54-temperature control liquid inlet control valve; 60-fire fighting unit; 61-fire fighting liquid inlet pipe; 62-fire fighting liquid inlet control valve; 70-energy storage compartment. DETAILED DESCRIPTION

[0058] 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.

[0059] Example 1

[0060] like Figure 1-6As shown, the layered overflow energy storage compartment of this embodiment includes a compartment 10 and an energy storage assembly installed in the compartment 10. A side channel is provided between the energy storage assembly and the side wall of the compartment 10, and the side channel runs through the upper and lower ends of the energy storage assembly. The energy storage assembly includes at least one layer of energy storage units, and the energy storage unit includes a bottom plate 11 and a battery pack installed on the bottom plate 11. The battery pack includes a number of battery cells 12. In this embodiment, the pole lugs 13 of the battery cells 12 are arranged on the top surface. Of course, in some other embodiments, the pole lugs of the battery cells 12 can also be arranged on other side surfaces or bottom surfaces, which will not be repeated. The battery cells 12 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 14 is provided between two adjacent rows of battery cells 12; when n≥2 and m≥1, an inter-row gap channel 15 is provided between two adjacent columns of battery cells 12. In this embodiment, the battery cells 12 in the energy storage unit are arranged in 10 rows and 4 columns. In some other embodiments, the number and arrangement of the battery cells 12 in the energy storage unit can be set according to actual needs and will not be described in detail.

[0061] In this embodiment, the inter-row gap channel 14 and / or the inter-column gap channel 15 are provided with an internal partition 16 for isolating the side channel, and the internal partition 16 forms an internal channel in the battery pack that is independent of the side channel. Of course, in some other embodiments, a side panel for isolating the inter-row gap channel 14 and / or the inter-column gap channel 15 from the side channel can also be installed on the bottom plate 11, and the side panel forms an internal channel in the battery pack that is independent of the side channel, which will not be repeated. In other embodiments, the internal partition 16 and the side panel can also be combined to form an internal channel in the inter-row gap channel 14 and / or the inter-column gap channel 15 that is independent of the side channel, which will not be repeated.

[0062] In the present embodiment, a first liquid inlet pipe 17 is provided in the compartment 10. Specifically, the first liquid inlet pipe 17 of the present embodiment is located in the vertical direction, and the upper end or the lower end of the first liquid inlet pipe 17 is the liquid inlet end. In the present embodiment, the upper end of the first liquid inlet pipe 17 is the liquid inlet end. The first liquid inlet pipe 17 is provided with a unit liquid inlet pipe 18 corresponding to each energy storage unit, and the unit liquid inlet pipe 18 is connected to the bottom of the internal channel. An overflow outlet 19 connected to the side temperature control channel is provided on the side wall or the top of the internal channel. In the present embodiment, the overflow height of the overflow outlet 19 is higher than the top surface of the battery cell 12 of the corresponding energy storage unit, that is, in the present embodiment, the overflow outlet 19 is provided at the top of the battery pack, and the overflow height of the overflow outlet 19 is higher than the top surface of the corresponding battery pack. Of course, in some other embodiments, the overflow outlet 19 can also be set on the side wall of the internal channel. In this case, the overflow height of the overflow outlet 19 can be lower than the top surface of the battery cell 12, that is, the outlet height of the overflow outlet 19 can be set according to actual needs and will not be repeated.

[0063] In this embodiment, the side channel surrounds the energy storage assembly. In this embodiment, a side partition 20 is provided in the side channel, and the side partition 20 divides the side channel into at least one independent side overflow channel 21; or, the side partition 20 divides the side channel into at least one independent side overflow channel 21 and at least one side temperature control channel. In this embodiment, the side partition 20 divides the side channel into one independent side overflow channel 21 and three side temperature control channels. The overflow outlet 19 is connected to the side overflow channel 21. Specifically, in order to perform temperature control on the side of the energy storage assembly, a second liquid inlet pipe 22 for injecting a temperature control medium into the side channel is provided in the compartment 10 of this embodiment. In this embodiment, a liquid outlet bin 23 located below the energy storage assembly is provided in the compartment, and a liquid outlet pipe 24 is provided on the liquid outlet bin 23, and a liquid outlet control valve 25 is provided on the liquid outlet pipe 24. The side overflow channel 21 is connected to the liquid outlet bin 23, and a first liquid outlet pipe 26 is provided between the side temperature control channel and the liquid outlet bin 23, and a first control valve 27 for controlling the liquid outlet flow rate is provided on the first liquid outlet pipe 26. In this embodiment, the side overflow channel 21 is connected to the liquid outlet bin 23 through the first overflow liquid outlet pipe 21a, and a first overflow liquid outlet control valve 21b is provided on the first overflow liquid outlet pipe 21a. During normal operation, the first overflow liquid outlet control valve 21b is in a normally open state so that the overflowing temperature control medium can quickly flow out of the side overflow channel 21; when fire control is required, the first overflow liquid outlet control valve 21b is closed so that the side overflow channel 21 is quickly filled with the temperature control medium.

[0064] Specifically, in this embodiment, the side overflow channel 21 is located between the front side of the energy storage assembly and the inner wall of the compartment 10. The overflow outlet 19 is arranged at the top of the front side of the battery pack, and the overflow height of the overflow outlet 19 is higher than the top surface of the corresponding battery pack. The left side, right side and rear side of the top surface of the battery pack are respectively provided with side baffles 28 higher than the overflow outlet 19. In this embodiment, there are three side temperature control channels, which are the left side temperature control channel 30, the right side temperature control channel 31 and the rear side temperature control channel 32. The left side temperature control channel 30, the right side temperature control channel 31 and the rear side temperature control channel 32 are respectively located between the left side, the right side and the rear side of the energy storage assembly and the inner wall of the compartment 10. The second liquid inlet pipe 22 is arranged corresponding to the side overflow channel 21 and the side temperature control channel. The second liquid inlet pipe 22 is used to inject the temperature control medium into the corresponding side overflow channel 21 or the side temperature control channel, and the second liquid inlet pipe 21 is provided with a second control valve 22a. Specifically, in this embodiment, the second liquid inlet pipe 22 is arranged in a one-to-one correspondence with the left temperature control channel 30, the right temperature control channel 31, the rear temperature control channel 32 and the side overflow channel 21, and the second liquid inlet pipe 22 is used to inject the temperature control medium into the corresponding left temperature control channel 30, the right temperature control channel 31, the rear temperature control channel 32 or the side overflow channel 21. Specifically, during normal operation, the second control valve 22a on the second liquid inlet pipe 22 corresponding to the left temperature control channel 30, the right temperature control channel 31 and the rear temperature control channel 32 is in a normally open state, and the second control valve 22a on the second liquid inlet pipe 22 corresponding to the side overflow channel 21 is in a normally closed state; when fire control is required, the second control valve 22a on the second liquid inlet pipe 22 corresponding to the side overflow channel 21 is opened.

[0065] Of course, in some other embodiments, an overflow inlet pipe for injecting a temperature control medium into the side overflow channel 21 and a temperature control inlet pipe for injecting a temperature control medium into the side temperature control channel may be connected to the second inlet pipe 22; the overflow inlet pipe is connected with an overflow inlet branch pipe 22b corresponding to the side overflow channel 21, and the temperature control inlet pipe is connected with a side inlet branch pipe 22c corresponding to the side temperature control channel. In this embodiment, the overflow inlet pipe and the temperature control inlet pipe are respectively provided with an overflow inlet control valve 22d and a side inlet control valve 22e. Of course, in some other embodiments, the overflow inlet control valve 22d and the side inlet control valve 22e may also be respectively provided on the overflow inlet branch pipe and the side inlet branch pipe, which will not be described in detail. In this embodiment, three side liquid inlet branches 22c are provided, and the three side liquid inlet branches 22c are used to inject temperature control medium into the left temperature control channel 30, the right temperature control channel 31 and the rear temperature control channel 32 respectively, and the side liquid inlet control valve 22e is used to control the flow rate of the temperature control medium injected into the side temperature control channel. In this embodiment, one overflow liquid inlet branch 22b is provided, and it can also be understood that the overflow liquid inlet branch 22b and the overflow liquid inlet pipe are substantially the same pipe, and the overflow liquid inlet control valve 22d is used to open in the fire control to quickly fill the side overflow channel 21 with temperature control medium.

[0066] In this embodiment, the first liquid outlet pipe 26 is arranged in one-to-one correspondence with the side temperature control channel, and the first liquid outlet pipe 26 is connected to the bottom of the corresponding side temperature control channel. Specifically, the first liquid outlet pipe 26 is arranged in one-to-one correspondence with the left temperature control channel 30, the right temperature control channel 31 and the rear temperature control channel 32, and the first liquid outlet pipe 26 is connected to the bottom of the corresponding left temperature control channel 30, the right temperature control channel 31 or the rear temperature control channel 32. In this way, the first control valve 27 arranged on the first liquid outlet pipe 26 can be used to independently control the liquid outflow of the left temperature control channel 30, the right temperature control channel 31 and the rear temperature control channel 32. Of course, in some other embodiments, a first liquid outlet branch pipe 26a which is respectively connected to the bottom of the left temperature control channel 30, the right temperature control channel 31 and the rear temperature control channel 32 can be connected to the first liquid outlet pipe 26, that is, a first control valve 27 arranged on the first liquid outlet pipe 26 is used to simultaneously control the liquid outlet flow rates of the left temperature control channel 30, the right temperature control channel 31 and the rear temperature control channel 32.

[0067] Specifically, in order to make the flow rate and flow rate of the temperature control medium more evenly distributed in the internal channel, the present embodiment provides a liquid inlet diversion channel on the bottom plate 11 for distributing the temperature control medium to the inter-row gap channels 14 and the inter-column gap channels 15. In the present embodiment, the liquid inlet diversion channel includes a liquid inlet 11a connected to the unit liquid inlet pipe 18 and at least one diversion channel 33 parallel to each other, and the side walls of the diversion channel 33 are provided with liquid inlet diversion ports 34 connected to the internal channel at intervals. The position and number of the diversion channels 34 are set according to the actual application scenario, such as the row and column arrangement of the battery cells 12 in the battery pack. Specifically, the diversion channel 33 can be set in the X direction or in the Y direction. When the diversion channel 33 is set to one, the liquid inlet 11a is connected to the diversion channel 33, such as Figure 6 As shown, the flow diversion channel 33 is located in the middle of the bottom plate. When there are at least two flow diversion channels 33, the liquid inlet flow diversion channel includes a distribution channel 35 perpendicular to the flow diversion channel 33, and all flow diversion channels 33 are connected to the distribution channel 35. Figure 7-8 As shown, the diversion channels 33 are provided as two, and the two diversion channels 33 are respectively located on both sides of the bottom plate. Of course, the diversion channels 33 can also be provided as three or more. Fig. 9 As shown, there are three diverter channels 33, all of which are arranged at intervals on the bottom plate 11, and two of the diverter channels 33 are located on both sides of the bottom plate 11. The liquid inlet diverter port 34 is arranged along the diverter channel 33, and the flow area of ​​the liquid inlet diverter port 34 gradually increases or decreases in the direction close to the liquid inlet port 11a. Of course, the flow area of ​​the liquid inlet diverter port 34 can also be kept equal in the direction close to the liquid inlet port 11a; specifically, the change rule of the flow area of ​​the liquid inlet diverter port 34 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.

[0068] Specifically, when there are at least two flow diversion channels 33, a first rough element 36 for diverting the temperature control medium is provided in the distribution channel 35; the first rough element 36 enables the temperature control medium in the distribution channel 35 to enter the corresponding flow diversion channels 33 according to the set flow ratio, such as Figure 7-9 In the preferred implementation of this embodiment, second rough elements 37 for guiding the temperature control medium are provided on the bottom plate 11 corresponding to the flow diversion channels 33. The second rough elements 37 make the flow distribution of the temperature control medium more uniform. Specifically, when the number of flow diversion channels 33 is large and the spacing between adjacent flow diversion channels 33 is small, the second rough elements 37 are evenly arranged on the bottom plate 11, as shown in FIG. Fig. 9 When there is only one shunt channel 33 or the spacing between two adjacent shunt channels 33 is large, the arrangement density of the second rough element 37 gradually decreases in the direction away from the shunt channel 33, such as Figure 7-8As shown, fewer second rough elements 37 are arranged away from the shunt channel 33 to store more temperature control medium to improve the temperature uniformity performance. Of course, when there is only one shunt channel 33 or the distance between two adjacent shunt channels 33 is large, the second rough elements 37 can also be arranged evenly on the bottom plate, such as Figure 6 In this embodiment, the first rough element 36 and the second rough element 37 are both rectangular protrusions protruding upwards, there is a gap between the top surface of the second rough element 37 and the bottom surface of the battery cell 12, and a support column 371 for supporting the battery cell 12 is provided on the top surface of the second rough element 37, as shown in FIG. Fig.10 shown.

[0069] In this embodiment, in order to facilitate processing and manufacturing, the shunt channel 33 is a groove set on the bottom plate 11. At this time, a cover plate corresponding to the shunt channel 33 can be set on the bottom surface of the battery pack. When the battery pack is installed on the bottom plate 11, the cover plate covers the corresponding shunt channel 33. Specifically, in this embodiment, there are three shunt channels 33, and two of the three shunt channels 33 are located on both sides.

[0070] When the energy storage unit is set to at least two layers, in the adjacent two layers of energy storage units, the diameter of the unit liquid inlet pipe 18 close to the liquid inlet end of the first liquid inlet pipe 17 is larger than the diameter of the unit liquid inlet pipe 18 far from the liquid inlet end, so that the flow distribution of each unit liquid inlet pipe 18 can be more uniform. Of course, a proportional valve 18a for controlling the liquid inlet flow can also be provided on the unit liquid inlet pipe 18, so that the flow of the temperature control medium in each layer of energy storage units can be controlled separately, so that the temperature control between the energy storage units is more balanced and the temperature uniformity performance is improved. In this embodiment, the energy storage unit is set to 7 layers in total.

[0071] Example 2

[0072] like Figure 7-11As shown, the layered overflow energy storage compartment of this embodiment includes a compartment 10 and an energy storage assembly installed in the compartment 10. A side channel is provided between the energy storage assembly and the side wall of the compartment 10, and the side channel runs through the upper and lower ends of the energy storage assembly. The energy storage assembly includes at least one layer of energy storage units, and the energy storage unit includes a bottom plate 11 and a battery pack installed on the bottom plate 11. The battery pack includes a number of battery cells 12. In this embodiment, the pole lugs 13 of the battery cells 12 are arranged on the top surface. Of course, in some other embodiments, the pole lugs of the battery cells 12 can also be arranged on other side surfaces or bottom surfaces, which will not be repeated. The battery cells 12 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 14 is provided between two adjacent rows of battery cells 12; when n≥2 and m≥1, an inter-row gap channel 15 is provided between two adjacent columns of battery cells 12. In this embodiment, the battery cells 12 in the energy storage unit are arranged in 10 rows and 4 columns. In some other embodiments, the number and arrangement of the battery cells 12 in the energy storage unit can be set according to actual needs and will not be described in detail.

[0073] In this embodiment, the inter-row gap channel 14 and / or the inter-column gap channel 15 are provided with an internal partition 16 for isolating the side channel, and the internal partition 16 forms an internal channel in the battery pack that is independent of the side channel. Of course, in some other embodiments, a side panel for isolating the inter-row gap channel 14 and / or the inter-column gap channel 15 from the side channel can also be installed on the bottom plate 11, and the side panel forms an internal channel in the battery pack that is independent of the side channel, which will not be repeated. In other embodiments, the internal partition 16 and the side panel can also be combined to form an internal channel in the inter-row gap channel 14 and / or the inter-column gap channel 15 that is independent of the side channel, which will not be repeated.

[0074] In the present embodiment, a first liquid inlet pipe 17 is provided in the compartment 10. Specifically, the first liquid inlet pipe 17 of the present embodiment is located in the vertical direction, and the upper end or the lower end of the first liquid inlet pipe 17 is the liquid inlet end. In the present embodiment, the upper end of the first liquid inlet pipe 17 is the liquid inlet end. The first liquid inlet pipe 17 is provided with a unit liquid inlet pipe 18 corresponding to each energy storage unit, and the unit liquid inlet pipe 18 is connected to the bottom of the internal channel. An overflow outlet 19 connected to the side temperature control channel is provided on the side wall or the top of the internal channel. In the present embodiment, the overflow height of the overflow outlet 19 is higher than the top surface of the battery cell 12 of the corresponding energy storage unit, that is, in the present embodiment, the overflow outlet 19 is provided at the top of the battery pack, and the overflow height of the overflow outlet 19 is higher than the top surface of the corresponding battery pack. Of course, in some other embodiments, the overflow outlet 19 can also be set on the side wall of the internal channel. In this case, the overflow height of the overflow outlet 19 can be lower than the top surface of the battery cell 12, that is, the outlet height of the overflow outlet 19 can be set according to actual needs and will not be repeated.

[0075] In this embodiment, the side channel surrounds the energy storage assembly. In this embodiment, a side partition 20 is provided in the side channel, and the side partition 20 divides the side channel into at least one independent side overflow channel 21; or, the side partition 20 divides the side channel into at least one independent side overflow channel 21 and at least one side temperature control channel. In this embodiment, the side partition 20 divides the side channel into two independent side overflow channels 21 and two side temperature control channels. The two side overflow channels are respectively located between the front side and the rear side of the energy storage assembly and the inner wall of the compartment 10, namely the front overflow channel 21c and the rear overflow channel 21d; correspondingly, the overflow outlet 19 is set to two groups, and the two groups of overflow outlets 19 are respectively connected to the two front overflow channels 21c and the rear overflow channel 21d. The two side temperature control channels are respectively located between the left side and right side of the energy storage assembly and the inner wall of the compartment 10, and are respectively the left temperature control channel 30 and the right temperature control channel 31. Specifically, in order to perform temperature control on the side of the energy storage assembly, a second liquid inlet pipe 22 for injecting a temperature control medium into the side channel is provided in the compartment 10 of this embodiment.

[0076] In the compartment 10 of this embodiment, a first liquid outlet bin 38 and a second liquid outlet bin 39 are provided below the energy storage assembly. The first liquid outlet bin 38 and the second liquid outlet bin 39 are independently arranged. The first liquid outlet bin 38 and the second liquid outlet bin 39 are provided with a liquid outlet pipe 38a and a liquid outlet pipe 39a, respectively. The liquid outlet pipe 38a and the liquid outlet pipe 39a are provided with a liquid outlet valve 38b and a liquid outlet valve 39b, respectively. The side overflow channel 21 is connected with the first liquid outlet bin 38; specifically, in this embodiment, the side overflow channel 21 is connected with the first liquid outlet bin through a second overflow liquid outlet pipe 40, and the second overflow liquid outlet pipe 40 is provided with a second overflow liquid outlet control valve 40a; when operating normally, the second overflow liquid outlet control valve 40a is in a normally open state, so that the temperature control medium in the side overflow channel 21 can be quickly emptied; when fire control is performed, the second overflow liquid outlet control valve 40a is closed, so that the side overflow channel 21 is quickly filled with the temperature control medium. The side temperature control channel is connected to the second liquid outlet bin 39 through the first liquid outlet pipe 26. In this way, the first liquid outlet bin 38 and the second liquid outlet bin 39 are used to independently control the liquid discharge of the side overflow channel 21 and the side temperature control channel, so as to prevent the temperature control medium in the side temperature control channel from entering the side overflow channel 21 due to the formation of a communicating vessel or the like.

[0077] Specifically, in this embodiment, the side overflow channel 21 is located between the front side and rear side of the energy storage assembly and the inner wall of the compartment 10. The overflow outlet 19 is arranged at the top of the front side and rear side of the battery pack, and the overflow height of the overflow outlet 19 is higher than the top surface of the corresponding battery pack. The left and right sides of the top surface of the battery pack are respectively provided with side baffles 28 higher than the overflow outlet 19. In this embodiment, there are two side temperature control channels, which are respectively located between the left and right sides of the energy storage assembly and the inner wall of the compartment 10, and the two side temperature control channels are respectively the left temperature control channel 30 and the right temperature control channel 31. Specifically, in this embodiment, an overflow inlet pipe for injecting a temperature control medium into the side overflow channel 21 and a temperature control inlet pipe for injecting a temperature control medium into the side temperature control channel are connected to the second inlet pipe 22; the overflow inlet pipe is connected with an overflow inlet branch pipe 22b corresponding to the side overflow channel 21, and the temperature control inlet pipe is connected with a side inlet branch pipe 22c corresponding to the side temperature control channel. In this embodiment, an overflow inlet control valve 22d and a side inlet control valve 22e are respectively provided on the overflow inlet pipe and the temperature control inlet pipe. Of course, in some other embodiments, the overflow inlet control valve 22d and the side inlet control valve 22e can also be respectively provided on the overflow inlet branch pipe and the side inlet branch pipe, which will not be described in detail. In this embodiment, two side liquid inlet branches 22c are provided, and the two side liquid inlet branches 22c are used to inject temperature control medium into the left temperature control channel 30 and the right temperature control channel 31 respectively, and the side liquid inlet control valve 22e is used to control the flow rate of the temperature control medium injected into the side temperature control channel. In this embodiment, two overflow liquid inlet branches 22b are provided, and the two overflow liquid inlet branches 22b are used to inject temperature control medium into the front overflow channel 21c and the rear overflow channel 21d respectively. Specifically, the overflow liquid inlet control valve 22d is in a normally closed state during normal operation, and is opened when fire control is required to quickly fill the side overflow channel 21 with temperature control medium.

[0078] In this embodiment, the first liquid outlet pipe 26 is connected to a first liquid outlet branch pipe 26a which is respectively connected to the bottom of the left temperature control channel 30 and the right temperature control channel 31. That is, a first control valve 27 arranged on the first liquid outlet pipe 26 is used to simultaneously control the liquid outlet flow rates of the left temperature control channel 30 and the right temperature control channel 31.

[0079] When the energy storage unit is set to at least two layers, in the adjacent two layers of energy storage units, the diameter of the unit liquid inlet pipe 18 close to the liquid inlet end of the first liquid inlet pipe 17 is larger than the diameter of the unit liquid inlet pipe 18 far from the liquid inlet end, so that the flow distribution of each unit liquid inlet pipe 18 can be more uniform. Of course, a proportional valve 18a for controlling the liquid inlet flow can also be provided on the unit liquid inlet pipe 18, so that the flow of the temperature control medium in each layer of energy storage units can be controlled separately, so that the temperature control between the energy storage units is more balanced and the temperature uniformity performance is improved. In this embodiment, the energy storage unit is set to 7 layers in total.

[0080] Other implementations of this embodiment are the same or equivalent to those of Embodiment 1 and will not be described again.

[0081] Example 3

[0082] like Fig.12 As shown, the stratified overflow energy storage system of this embodiment includes a temperature control unit 50, a fire fighting unit 60 and a stratified overflow energy storage compartment 70. The temperature control unit 50 includes a liquid inlet main pipe 51 and a liquid return main pipe 52. The first liquid inlet pipe 17 is connected to the liquid inlet main pipe 51; the liquid return main pipe 52 is used to return the temperature control medium in the energy storage compartment 70 to the temperature control unit 50. A temperature control liquid inlet pipe 53 is provided between the liquid outlet of the temperature control unit 50 and the liquid inlet main pipe 51, and a temperature control liquid inlet control valve 54 is provided on the temperature control liquid inlet pipe 53. The liquid outlet of the temperature control unit 50 is connected to the liquid return main pipe 52. A fire fighting liquid inlet pipe 61 is provided between the liquid outlet of the fire fighting unit 60 and the liquid inlet main pipe 51, and a fire fighting liquid inlet control valve 62 is provided on the fire fighting liquid inlet pipe 61.

[0083] The energy storage compartment 70 in this embodiment may adopt a layered overflow energy storage compartment as described in Embodiment 1 and Embodiment 2.

[0084] 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 layered overflow energy storage compartment, characterized in that: It includes a box body and an energy storage assembly installed in the box body; A side channel is provided between the energy storage assembly and the side wall of the compartment, and the side channel passes through the upper and lower ends of the energy storage assembly; The energy storage assembly includes at least one layer of energy storage units, and the energy storage unit includes a bottom plate and a battery pack mounted on the bottom plate; the battery pack includes a plurality of battery cells, and 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; An internal partition for isolating the side channel is provided in the inter-row gap channel and / or the inter-column gap channel, and the internal partition forms an internal channel independent of the side channel in the battery pack; and / or a side plate for isolating the inter-row gap channel and / or the inter-column gap channel from the side channel is installed on the bottom plate, and the side plate forms an internal channel independent of the side channel in the battery pack; A first liquid inlet pipe is provided in the compartment, and a unit liquid inlet pipe is provided on the first liquid inlet pipe in a one-to-one correspondence with each energy storage unit, and the unit liquid inlet pipe is connected to the bottom of the internal channel; The side wall or top of the internal channel is provided with an overflow outlet communicated with the side channel.

2. The layered overflow energy storage compartment according to claim 1 is characterized in that: The first liquid inlet pipe is located in the vertical direction, and the upper end or the lower end of the first liquid inlet pipe is the liquid inlet end; when the energy storage unit is set to at least two layers, in the two adjacent layers of the energy storage units, the diameter of the unit liquid inlet pipe close to the liquid inlet end is larger than the diameter of the unit liquid inlet pipe far from the liquid inlet end; or, a proportional valve for controlling the liquid inlet flow rate is provided on the unit liquid inlet pipe.

3. The layered overflow energy storage compartment according to claim 1, characterized in that: The side channel surrounds the energy storage assembly.

4. The layered overflow energy storage compartment according to claim 3 is characterized in that: A side partition is provided in the side channel, and the side partition divides the side channel into at least one side overflow channel that is independent of each other; or, the side partition divides the side channel into at least one side overflow channel and at least one side temperature control channel that are independent of each other; the overflow liquid outlet is connected to the side overflow channel.

5. The layered overflow energy storage compartment according to claim 4 is characterized in that: The compartment is provided with a second liquid inlet pipe for injecting a temperature control medium into the side channel.

6. The layered overflow energy storage compartment according to claim 5, characterized in that: The second liquid inlet pipe is arranged corresponding to the side overflow channel and the side temperature control channel, the second liquid inlet pipe is used to inject temperature control medium into the corresponding side overflow channel or the side temperature control channel, and the second liquid inlet pipe is provided with a second control valve; or, the second liquid inlet pipe is connected with an overflow liquid inlet pipe for injecting temperature control medium into the side overflow channel and a temperature control liquid inlet pipe for injecting temperature control medium into the side temperature control channel; the overflow liquid inlet pipe is connected with overflow liquid inlet branches corresponding to the side overflow channels one by one, and the temperature control liquid inlet pipe is connected with side liquid inlet branches corresponding to the side temperature control channels one by one; The overflow liquid inlet pipe and the temperature control liquid inlet pipe are respectively provided with an overflow liquid inlet control valve and a side liquid inlet control valve; or, the overflow liquid inlet branch pipe and the side liquid inlet branch pipe are respectively provided with an overflow liquid inlet control valve and a side liquid inlet control valve.

7. The layered overflow energy storage compartment according to claim 4, characterized in that: A liquid outlet bin is provided in the compartment below the energy storage assembly, and a liquid outlet pipe is provided on the liquid outlet bin; the side overflow channel is communicated with the liquid outlet bin, and a first liquid outlet pipe is provided between the side temperature control channel and the liquid outlet bin, and a first control valve for controlling the liquid outlet flow rate is provided on the first liquid outlet pipe.

8. The layered overflow energy storage compartment according to claim 7, characterized in that: The side overflow channel is connected to the liquid outlet bin via a first overflow liquid outlet pipe, and the overflow liquid outlet pipe is provided with a first overflow liquid outlet control valve.

9. The layered overflow energy storage compartment according to claim 7, characterized in that: The first liquid outlet pipe and the side temperature control channel are arranged in a one-to-one correspondence, and the first liquid outlet pipe is connected to the bottom of the corresponding side temperature control channel; or, the first liquid outlet pipe is connected to a first liquid outlet branch pipe respectively connected to the bottom of the side temperature control channel.

10. The layered overflow energy storage compartment according to claim 4, characterized in that: The compartment is provided with a first liquid outlet bin and a second liquid outlet bin located below the energy storage assembly, the first liquid outlet bin and the second liquid outlet bin are independently arranged, and the first liquid outlet bin and the second liquid outlet bin are respectively provided with liquid outlets; the side overflow channel is connected to the first liquid outlet bin; the side temperature control channel is connected to the second liquid outlet bin, or a second liquid outlet pipe is provided between the side temperature control channel and the second liquid outlet bin, and the second liquid outlet pipe is provided with a second control valve for controlling the liquid outlet flow rate.

11. The layered overflow energy storage compartment according to claim 10, characterized in that: The side overflow channel is connected to the first liquid outlet bin via a second overflow liquid outlet pipe, and a second overflow liquid outlet control valve is provided on the second overflow liquid outlet pipe.

12. The layered overflow energy storage compartment according to claim 1, characterized in that: The overflow outlet is arranged at the top of the battery pack, and the overflow height of the overflow outlet is higher than the top surface of the corresponding battery pack. The top surface of the battery pack is provided with a side baffle higher than the overflow outlet.

13. The layered overflow energy storage compartment according to claim 1, characterized in that: The bottom plate is provided with a liquid inlet flow distribution channel for distributing the temperature control medium to the inter-row gap channels and the inter-column gap channels.

14. The layered overflow energy storage compartment according to claim 13, characterized in that: The liquid inlet diversion channel includes a liquid inlet connected to the unit liquid inlet pipe and at least one diversion channel parallel to each other, and the side walls of the diversion channel are provided with liquid inlet diversion ports connected to the internal channel at intervals; 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.

15. The layered overflow energy storage compartment according to claim 14, 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.

16. The layered overflow energy storage compartment according to claim 14, 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.

17. The layered overflow energy storage compartment according to claim 14, 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.

18. The layered overflow energy storage compartment according to claim 17, characterized in that: The density of the second rough elements gradually decreases in a direction away from the branch channel.

19. The layered overflow energy storage compartment according to claim 14, characterized in that: The shunt channel is a groove arranged on the bottom plate; the bottom surface of the battery pack is provided with a cover plate arranged corresponding to the shunt channel.

20. The layered overflow energy storage compartment according to claim 1, characterized in that: The unit liquid inlet pipe is provided with a liquid inlet control valve for controlling the liquid inlet flow rate.

21. A layered overflow energy storage system, characterized in that: It comprises a temperature control unit, a fire-fighting unit and a stratified overflow energy storage compartment as described in any one of claims 1 to 20, wherein the temperature control unit comprises a liquid inlet main pipe and a liquid return main pipe, wherein the first liquid inlet pipe is connected to the liquid inlet main pipe; the liquid return main pipe is used to allow the temperature control medium in the energy storage compartment to flow back into the temperature control unit; a temperature control liquid inlet pipe is provided between the liquid outlet of the temperature control unit and the liquid inlet main pipe, a temperature control liquid inlet control valve is provided on the temperature control liquid inlet pipe, and the liquid outlet of the temperature control unit is connected to the liquid return main pipe; a fire liquid inlet pipe is provided between the liquid outlet of the fire-fighting unit and the liquid inlet main pipe, and a fire liquid inlet control valve is provided on the fire liquid inlet pipe.

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