Energy storage module and bottom plate and injection mold thereof

Abstract

The utility model discloses an energy storage module base plate, the middle part of the upper surface of the base plate is provided with a middle shunting channel, and the two sides of the upper surface of the base plate are respectively provided with a side shunting channel; a distribution channel is arranged at the front end of the bottom plate; the middle flow dividing channel and the side flow dividing channel are communicated with the distribution channel, and the middle flow dividing channel and the side flow dividing channel extend backwards from the distribution channel to the rear end of the bottom plate; middle flow dividing holes are formed in the side walls of the two sides of the middle flow dividing channel at intervals; side flow dividing holes are formed in the inner side walls, facing the middle flow dividing channel, of the side flow dividing channels at intervals. The utility model further discloses an energy storage module and an injection mold. According to the energy storage module, the bottom plate thereof and the injection mold, the liquidity distribution of a liquid medium can be more uniform.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric energy storage, and specifically relates to an energy storage module and a bottom plate and an injection mold thereof. 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 submerged energy storage system that immerses the energy storage battery in a liquid medium has been rapidly developed. The submerged energy storage system immerses the energy storage battery in a liquid medium and uses heat exchange between the liquid medium and the energy storage battery to achieve heat dissipation. However, most of the existing submerged energy storage systems adopt a static immersion method. After a long period of operation, the temperature will gradually increase due to the gradual accumulation of heat in the liquid medium. In order to solve the shortcomings of static immersion, some energy storage systems adopt a dynamic immersion method, that is, the liquid medium maintains a certain fluidity. However, due to the large internal space of the energy storage system and the small inlet and outlet flow rates of the liquid medium, the fluidity of the liquid medium is insufficient, and the liquid medium in some areas will not flow, and the problem of static immersion still exists. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide an energy storage module and a base plate and an injection mold thereof, which can make the fluidity distribution of the liquid medium more uniform.

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

[0007] The utility model firstly proposes an energy storage module bottom plate, wherein a flow dividing channel is provided on the upper surface of the bottom plate, and the flow dividing channel comprises two side flow dividing channels respectively located on both sides of the upper surface of the bottom plate and at least one middle flow dividing channel located between the two side flow dividing channels; a distribution channel is provided at the front end of the bottom plate; the middle flow dividing channel and the side flow dividing channel are both connected with the distribution channel, and the middle flow dividing channel and the side flow dividing channel both extend backward from the distribution channel to the rear end of the bottom plate;

[0008] Middle flow holes are arranged at intervals on the side walls on both sides of the middle flow channel; and side flow holes are arranged at intervals on the inner side walls of the side flow channels facing the middle flow channel.

[0009] Furthermore, the width of the middle diversion channel gradually increases from front to back or from back to front.

[0010] Furthermore, the angle between the side walls of the middle diversion channel is 1°-5°.

[0011] Furthermore, the ratio between the maximum width and the minimum width of the middle diversion channel is 2-5.

[0012] Furthermore, the width of the side shunt channel gradually increases along the direction from front to back or from back to front.

[0013] Furthermore, the angle between the inner wall and the outer wall of the side diversion channel is 0.2°-1°.

[0014] Furthermore, the ratio between the maximum width and the minimum width of the side diversion channel is 1-2.

[0015] Furthermore, the center line of the middle shunt channel is perpendicular to the distribution channel; the center axis or the outer side wall of the side shunt channel is perpendicular to the distribution channel.

[0016] Furthermore, a support area is provided between two adjacent diversion channels, and an array of support protrusions that protrude upward and are used to support the energy storage unit are provided in the support area.

[0017] Furthermore, crisscross bottom plate channels are provided between the support protrusions for the circulation of the temperature control medium.

[0018] Furthermore, the support protrusions are arranged in an array along a direction parallel to and perpendicular to the diversion channel, the bottom plate channel includes a first bottom plate channel parallel to the diversion channel and a second bottom plate channel perpendicular to the first bottom plate channel, the width of the first bottom plate channel gradually increases from front to back or from back to front; among two adjacent second bottom plate channels, the width of the second bottom plate channel close to the rear end is greater than or smaller than the width of the second bottom plate channel close to the front end.

[0019] Furthermore, a support column for supporting the energy storage unit is provided on the support protrusion.

[0020] Further, the middle flow distribution channel and the side flow distribution channel are both groove structures arranged on the upper surface of the bottom plate; or, the middle flow distribution channel and the side flow distribution channel are both pipe structures arranged on the upper surface of the bottom plate.

[0021] Further, the distribution channel is a groove-shaped structure arranged on the upper surface of the base plate, a front cover plate is provided on the distribution channel, the front cover plate covers the distribution channel, and a liquid inlet is provided on the front cover plate; or, the distribution channel is a pipe structure arranged on the upper surface of the base plate, and a liquid inlet is provided on the distribution channel.

[0022] Furthermore, an overflow structure is provided at the edge of the lower surface of the bottom plate, and the overflow structure is configured as an overflow notch or an overflow hole.

[0023] Furthermore, the overflow structures are provided in at least two and are spaced apart at the edge of the lower surface of the bottom plate.

[0024] Furthermore, the overflow structure is arranged on the rear edge of the lower surface of the bottom plate.

[0025] The utility model also provides an energy storage module, comprising the energy storage module bottom plate as described above.

[0026] The utility model also provides an injection mold for producing the energy storage module bottom plate as described above.

[0027] The beneficial effects of the utility model are:

[0028] The energy storage module bottom plate of the utility model is provided with a central diversion channel in the middle of the upper surface of the bottom plate, and side diversion channels are respectively provided on both sides of the upper surface of the bottom plate, and the temperature control medium is distributed to the central diversion channel and the side diversion channels according to a set ratio through the distribution channel, and then the temperature control medium is diverted again through the central diversion holes provided on the side walls on both sides of the central diversion channel and the side diversion holes provided on the inner walls of the side diversion channels, so that the fluidity of the temperature control medium is more evenly distributed on the entire upper surface of the bottom plate. In this way, in the energy storage module using the bottom plate of the utility model, the fluidity of the temperature control medium is evenly distributed, thereby avoiding the existence of dead zones where the temperature control medium does not flow in the energy storage module, and avoiding the problem of local temperature increase caused by insufficient fluidity of the temperature control medium in local areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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:

[0030] Figure 1 It is a structural schematic diagram of an energy storage module embodiment;

[0031] Figure 2 It is a full cross-sectional view of the energy storage module along the Y direction;

[0032] Figure 3 for Figure 2 An enlarged view of the A region, specifically a schematic diagram of the structure when the overflow structure is an overflow notch;

[0033] Figure 4 for Figure 2 An enlarged view of region A, specifically a schematic diagram of a structure when the overflow structure is an overflow hole;

[0034] Figure 5 It is a full cross-sectional view of the energy storage module along the X direction;

[0035] Figure 6 is a schematic diagram of the structure of the bottom plate, specifically a schematic diagram of the structure when there are three diversion channels;

[0036] Figure 7 for Figure 6 Schematic diagram of the structure behind the hidden front cover;

[0037] Figure 8 A schematic diagram of the structure of the lower hoop;

[0038] Fig. 9 is a structural schematic diagram of an embodiment of an energy storage device;

[0039] Fig.10 for Fig. 9 BB cross-sectional view;

[0040] Fig.11 for Fig. 9 CC section view;

[0041] Fig.12 for Fig. 9 A magnified view of region D;

[0042] Fig.13 for Fig.11 An enlarged view of the E region, specifically a schematic diagram of the structure when the overflow structure is an overflow notch;

[0043] Fig.14 for Fig.11 An enlarged view of the E region is shown, specifically a schematic diagram of the structure when the overflow structure is an overflow hole.

[0044] Description of reference numerals:

[0045] 10-energy storage monomer; 11-inter-row gap channel; 12-inter-column gap channel; 13-end pressure plate; 14-sealing strip; 15-gasket; 16-upper hoop; 17-lower hoop; 18-liquid inlet; 19-first liquid inlet pipe; 191-liquid inlet proportional valve;

[0046] 20-bottom plate; 21-middle flow channel; 211-middle flow hole; 22-side flow channel; 221-side flow hole; 23-distribution channel; 24-support protrusion; 241-support column; 25-bottom plate channel; 26-cover plate; 27-front cover plate; 28-overflow notch; 29-overflow hole;

[0047] 100- compartment; 101- second liquid inlet pipe;

[0048] 110-energy storage bin; 111-overflow channel; 112-immersion channel; 1121-connecting port; 113-energy storage module;

[0049] 120-top functional compartment; 121-safety box; 122-top liquid inlet pipe; 1221-top liquid inlet branch pipe; 123-top liquid inlet valve; 124-safety exhaust valve; 125-explosion-proof valve;

[0050] 130 - bottom functional compartment; 131 - liquid storage tank; 132 - first connecting pipe; 133 - first control valve; 134 - second connecting pipe; 135 - second control valve; 136 - liquid return pipe; 137 - liquid return control valve. DETAILED DESCRIPTION

[0051] 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.

[0052] Example 1

[0053] like Figure 1-8 As shown, the energy storage module of this embodiment includes an energy storage module bottom plate (hereinafter referred to as the "bottom plate") 20 and a battery pack installed on the bottom plate 20, the battery pack includes a plurality of energy storage cells 10, and a gap channel between the energy storage cells 10 is provided in the battery pack. Specifically, the energy storage cells 10 of this embodiment are arranged into n columns along the X direction and into m rows along the Y direction; when n≥1 and m≥2, an inter-row gap channel 11 is provided between two adjacent rows of energy storage cells 10; when n≥2 and m≥1, an inter-column gap channel 12 is provided between two adjacent columns of energy storage cells 10; the two ends of the inter-row gap channel 11 and the inter-column gap channel 12 are sealed to form a gap channel. Specifically, in this embodiment, end pressure plates 13 are respectively provided on the front and rear end surfaces of the battery assembly perpendicular to the X direction, and the end pressure plates 13 seal the two ends of the inter-column gap channel 12. The two ends of the inter-row gap channel 11 are respectively provided with sealing strips 14 or sealing plates, and the sealing strips 14 or sealing plates seal the two ends of the inter-row gap channel 11. Specifically, the two ends of the inter-row gap channel 11 of this embodiment are respectively provided with sealing strips 14. In this way, the upper and lower ends of the gap channel can be connected.

[0054] In this embodiment, a gasket 15 is provided between two adjacent energy storage cells 10. The gasket 15 forms an inter-row gap channel 11 or an inter-column gap channel 12 between two adjacent energy storage cells 10. At the same time, the gasket 15 is also used to withstand the pressure between the energy storage cells 10 to prevent the energy storage cells 10 from irreversibly expanding and deforming during the charge and discharge process. Specifically, in this embodiment, an upper hoop 16 and a lower hoop 17 are respectively provided at the upper and lower ends of the battery pack. The upper hoop 16 and the lower hoop 17 are used to tighten the battery pack so that sufficient pressure is maintained between the energy storage cells 10. Under the pressure, the energy storage cells 10 can be prevented from irreversibly expanding and deforming during the charge and discharge process. Specifically, as Figure 5As shown, in this embodiment, the gasket 15 is arranged in an array between two adjacent energy storage cells 10, so that the gasket 15 is evenly distributed between the two adjacent energy storage cells 10, and the area of ​​the gasket 15 on the surface of the energy storage cell 10 accounts for 20-80%, preferably 30%-50%. In this way, it can not only meet the pressure bearing requirements, but also make the gap channel and the surface of the energy storage cell 10 have sufficient contact area, so as to improve the heat exchange efficiency between the temperature control medium in the gap channel and the energy storage cell 10. In this embodiment, the area of ​​the gasket 15 on the surface of the energy storage cell 10 accounts for 40%. Of course, in some other embodiments, the gasket 15 can also be arranged in other ways. For example, since the energy storage cell 10 is most likely to expand and deform in the middle of its surface, the gasket 15 can be made denser in the middle of the surface of the energy storage cell 10, which will not be repeated. The gasket 15 of this embodiment adopts a rhombus shape. Of course, in some other embodiments, the gasket 15 can also adopt a square, a regular polygon, a circle, an ellipse, etc.

[0055] The energy storage module also includes a liquid inlet 18 connected to the gap channel. The liquid inlet 18 of this embodiment is arranged on the bottom plate 20. A shunt channel is provided on the upper surface of the bottom plate 20 of this embodiment. Specifically, the shunt channel of this embodiment includes two side shunt channels 22 respectively located on both sides of the upper surface of the bottom plate 20 and at least one middle shunt channel 21 located between the two side shunt channels 22. In this embodiment, the middle shunt channel 21 is set as one. Of course, in some other embodiments, the middle shunt channel 21 can also be set as two or more, that is, the shunt channel can be set one by one with each column of energy storage cells 10. A distribution channel 23 is provided at the front end of the bottom plate 20. The middle shunt channel 21 and the side shunt channel 22 are both connected to the distribution channel 23, and the middle shunt channel 21 and the side shunt channel 22 extend backward from the distribution channel 23 to the rear end of the bottom plate 20. Central shunt holes 211 are provided on both side walls of the central shunt channel 21, respectively, and the central shunt holes 211 are arranged at the top or bottom of both side walls of the central shunt channel 21. Side shunt holes 221 are provided on the inner side wall of the side shunt channel 22 facing the central shunt channel 21, and the side shunt holes 221 are arranged at the top or bottom of the inner side wall of the side shunt channel 22. In this embodiment, the center line of the central shunt channel 21 is perpendicular to the distribution channel 23; the center axis or outer side wall of the side shunt channel 22 is perpendicular to the distribution channel 23.

[0056] Specifically, the width of the middle shunt channel 21 gradually increases from front to back or from back to front. The width of the middle shunt channel 21 of this embodiment gradually increases from front to back. The width variation law of the middle shunt channel 21 is related to the viscosity of the temperature control medium. If the viscosity of the temperature control medium is low, the width of the middle shunt channel 21 can be set to gradually increase from back to front; if the viscosity of the temperature control medium is high, the width of the middle shunt channel 21 can be set to gradually increase from front to back. The width variation law of the middle shunt channel 21 can be defined by the angle between the side walls on both sides. In this embodiment, the angle between the side walls on both sides of the middle shunt channel 21 is 1°-5°, and the value of this embodiment is 2.2°. Of course, the width variation law of the middle shunt channel 21 can also be defined by the ratio of the maximum width to the minimum width. In this embodiment, the ratio between the maximum width and the minimum width of the middle shunt channel 21 is 2-5, and the value of this embodiment is 3.3.

[0057] Similarly, the width of the side shunt channel 22 gradually increases from front to back or from back to front. The width of the side shunt channel 22 of this embodiment gradually increases from front to back. The width variation law of the side shunt channel 22 is related to the viscosity of the temperature control medium. If the viscosity of the temperature control medium is low, the width of the side shunt channel 22 can be set to gradually increase from back to front; if the viscosity of the temperature control medium is high, the width of the side shunt channel 22 can be set to gradually increase from front to back. The width variation law of the side shunt channel 22 can be defined by the angle between the side walls. In this embodiment, the angle between the side walls of the side shunt channel 22 is 0.2°-1°, and the value of this embodiment is 0.4°. Of course, the width variation law of the side shunt channel 22 can also be defined by the ratio of the maximum width to the minimum width. In this embodiment, the ratio between the maximum width and the minimum width of the side shunt channel 22 is 1-2, and the value of this embodiment is 1.5.

[0058] In this embodiment, a support area is provided between two adjacent shunt channels, and an array of support protrusions 24 that protrude upward and are used to support the energy storage unit are provided in the support area. Specifically, a support column 241 for supporting the energy storage unit 10 is provided on the support protrusion, so that the temperature control medium can flow on the bottom surface of the energy storage unit 10 and fully exchange heat with the bottom surface of the energy storage unit 10. Specifically, a criss-cross bottom plate channel 25 for the flow of the temperature control medium is provided between the support protrusions 24, and the temperature control medium is further shunted to make the flow distribution of the temperature control medium more uniform. Specifically, the support protrusions 24 are arranged in an array along the direction parallel to the shunt channel (Y direction) and perpendicular to the shunt channel (X direction), and the bottom plate channel 25 includes a first bottom plate channel parallel to the shunt channel. In some embodiments, the width of the first bottom plate channel can be gradually increased from front to back or from back to front, and the width change rule of the first bottom plate channel is the same as the width change rule of the shunt channel. The bottom plate channel includes a second bottom plate channel perpendicular to the first bottom plate channel. In some embodiments, among two adjacent second bottom plate channels, the width of a second bottom plate channel near the rear end is greater than or less than the width of a second bottom plate channel near the front end, and the width variation pattern of the two adjacent second bottom plate channels is the same as the width variation pattern of the diversion channel 21.

[0059] Specifically, in order to facilitate processing and manufacturing, the middle shunt channel 21 and the side shunt channel 22 of this embodiment are both groove-shaped structures arranged on the upper surface of the bottom plate 20, that is, the middle shunt channel 21 and the side shunt channel 22 are grooves arranged on the bottom plate 20; specifically, a cover plate 26 is provided on the bottom surface of the battery pack corresponding to the middle shunt channel 21 and the side shunt channel 22, and the cover plate 26 is arranged on the lower hoop 17, such as Figure 8 As shown. The cover plate 6 covers the groove to form a channel structure. Of course, in some other embodiments, the middle shunt channel 21 and the side shunt channel 22 can also be a channel structure directly arranged on the upper surface of the bottom plate 20, which will not be described in detail. Similarly, in order to facilitate processing, Figure 6-7 As shown, the distribution channel 23 of this embodiment is a groove-shaped structure arranged on the upper surface of the bottom plate 20, that is, the distribution channel is a groove arranged on the bottom plate 20, and a front cover plate 27 is arranged on the distribution channel 23, and the front cover plate 27 covers the distribution channel 23, and the liquid inlet 18 is arranged on the front cover plate 27. Of course, in some other embodiments, the distribution channel 23 can also be directly set as a channel structure on the upper surface of the bottom plate 20, and the liquid inlet 18 is directly arranged on the distribution channel 23 with a channel structure.

[0060] In this embodiment, an overflow structure is provided at the edge of the lower surface of the bottom plate 20. Specifically, the overflow structure can be set as an overflow notch 28, such as Figure 3 It can also be set as an overflow hole 29, such as Figure 4 As shown. Overflow notches 28 or overflow holes 29 are arranged at intervals on the edge of the lower surface of the bottom plate 20. Specifically, when the overflow structure is set as overflow notches 28, the liquid inlet end of the overflow notch 28 is located on the bottom surface of the bottom plate 20, and the overflow liquid outlet end is located on the side of the bottom plate. When the overflow structure is set as overflow holes 29, the overflow holes 29 pass through the bottom surface and the side of the bottom plate 20, and the end of the overflow hole 29 located on the bottom surface of the bottom plate 20 is the liquid inlet end, and the end located on the side of the bottom plate 20 is the overflow liquid outlet end. Specifically, in this embodiment, the overflow hole 29 is an inclined hole, and the angle between the center line of the overflow hole 29 and the bottom surface of the bottom plate 20 is greater than or equal to 100°, and the inner diameter of the overflow hole 29 is 1.5-5mm. Specifically, the angle between the center line of the overflow hole 29 of this embodiment and the bottom surface of the bottom plate 20 is 120°, and the inner diameter of the overflow hole 29 is 2.2mm. Of course, in some other embodiments, the geometric dimensions and inclination angle of the overflow hole 29 can be adjusted according to the application scenario, which will not be described in detail.

[0061] The overflow notch 28 or overflow hole 29 of the present embodiment is arranged on the rear edge of the lower surface of the bottom plate 20, and the liquid inlet 18 is arranged at the front end of the bottom plate 20. In this way, when at least two layers of energy storage modules constitute an energy storage assembly, and in two adjacent layers of energy storage modules, the temperature control medium in the energy storage module located in the lower layer overflows through the overflow structure arranged on the bottom surface of the energy storage module in the upper layer, that is, in the energy storage module, the temperature control medium enters from the front side of the lower end of the gap channel and overflows from the rear side of the upper end of the gap channel, which can make the fluidity of the temperature control medium in the gap channel more balanced and improve the temperature uniformity performance.

[0062] This embodiment also proposes an energy storage assembly, comprising at least two layers of energy storage modules as described above, wherein in two adjacent layers of energy storage modules, the temperature control medium in the energy storage module in the lower layer overflows through an overflow structure arranged on the bottom surface of the energy storage module in the upper layer.

[0063] This embodiment also provides an injection mold for producing the energy storage module bottom plate 20 described above in this embodiment.

[0064] In this embodiment, the energy storage cell 10 adopts a square shell battery, and the surface of the energy storage cell 10 refers to the surface with the largest surface area in the energy storage cell 10 .

[0065] Example 2

[0066] like Figure 9-14As shown, the energy storage device of this embodiment includes a box body 100, in which an energy storage bin 110 located in the middle and a top functional bin 120 and a bottom functional bin 130 located above and below the energy storage bin 110 are respectively provided. Specifically, an energy storage assembly is provided in the energy storage bin 110, a safety box 121 and a top liquid inlet pipe 122 are provided in the top functional bin 120, and a liquid storage tank 131 is provided in the bottom functional bin 130. Specifically, in this embodiment, an overflow channel 111 and an immersion channel 112 independent of each other are provided between the side wall of the energy storage assembly and the inner side wall of the box body 100, and the top liquid inlet pipe 122 is used to inject a temperature control medium into the immersion channel 112. In this embodiment, a top liquid inlet valve 123 is provided on the top liquid inlet pipe 122; a first connecting pipe 132 is provided between the bottom of the immersion channel 112 and the liquid storage tank 131, and a first control valve 133 is provided on the first connecting pipe 132; a second connecting pipe 134 is provided between the overflow channel 111 and the liquid storage tank 131, and a valve may not be provided on the second connecting pipe 134. Of course, a second control valve 135 may also be provided on the second connecting pipe 134, which will not be described in detail. A liquid return pipe 136 is connected to the liquid storage tank 131, and a liquid return control valve 137 is provided on the liquid return pipe 136.

[0067] like Fig.10 As shown, in this embodiment, the immersion channels 112 are provided as three independent channels, and the three immersion channels 112 are respectively located between the front side, the left side and the right side of the energy storage assembly and the corresponding inner side of the compartment, while the overflow channel 111 is located between the rear side of the energy storage assembly and the inner side of the compartment 100. Top liquid inlet branches 1221 are respectively provided on the top liquid inlet pipe 122 corresponding to the three immersion channels 112, which are used to inject temperature control medium into the three immersion channels 112 respectively. First connecting pipes 132 are respectively provided between the three immersion channels 112 and the liquid storage tank 131, which are used to discharge the temperature control medium in the three immersion channels 112 into the liquid storage tank 131 respectively. In a preferred implementation manner of this embodiment, a connecting port 1121 is provided between the tops of the three immersion channels 112, and the connecting port 1121 makes the liquid levels of the three immersion channels 112 equal. Specifically, the height of the connecting port 1121 is lower than the preset minimum liquid level in the immersion channel 112 under normal operating conditions. In this way, only one liquid level sensor needs to be provided in the energy storage bin 110 or the top functional bin 120 to detect the liquid levels of the three immersion channels 112 in real time.

[0068] The energy storage assembly of this embodiment includes at least two layers of energy storage modules 113, each layer of energy storage modules 113 is provided with a liquid inlet 18, and in two adjacent layers of energy storage modules 113, the overflow liquid height of the energy storage module 113 located in the next layer is greater than or equal to the bottom surface height of the energy storage module 113 located in the previous layer, so that it can be ensured that there is no air between the two adjacent layers of energy storage modules 113, so that the full immersion of the energy storage module is achieved under the condition of overflow circulation of the temperature control medium. In this embodiment, a first liquid inlet pipe 19 is connected to the liquid inlet 18, a second liquid inlet pipe 101 is provided in the compartment 100, and all first liquid inlet pipes 19 are connected to the second liquid inlet pipe 101. Specifically, a liquid inlet proportional valve 191 for controlling the liquid inlet flow rate of the corresponding energy storage module is provided on the first liquid inlet pipe 19 and / or the second liquid inlet pipe 101. In this embodiment, the liquid inlet proportional valve 191 is disposed on the first liquid inlet pipe 19, and can respectively control the liquid inlet flow rate of each energy storage module 113. Of course, in some other embodiments, the liquid inlet proportional valve can also be disposed on the second liquid inlet pipe 101, and the liquid inlet proportional valve can be disposed on both the first liquid inlet pipe 19 and the second liquid inlet pipe 101, which will not be described in detail.

[0069] Specifically, in this embodiment, the energy storage module 113 can adopt the energy storage module as described in Example 1, that is, an overflow structure is provided on the bottom surface of the energy storage module 113, and the overflow structure is connected to the overflow channel 111; the liquid inlet 18 is provided at the bottom of the front side of the energy storage module 113, and the overflow channel 111 is provided between the rear side of the energy storage component and the inner side of the compartment 100. In two adjacent layers of energy storage modules 113, the temperature control medium in the energy storage module 113 of the lower layer flows into the overflow channel 111 through the overflow structure provided on the bottom surface of the energy storage module 113 of the upper layer. The overflow structure is the same as or equivalent to the overflow structure of the energy storage component described in Example 1, and will not be described in detail.

[0070] A safety box 121 is provided in the top functional compartment of the present embodiment, and the safety box 121 is connected to the energy storage compartment 110. Sensors are provided in the safety box 121 of the present embodiment, in the overflow channel and / or on the top of the energy storage compartment, and the sensors are used to detect gas pressure, gas concentration and fire source. A safety exhaust valve 124 is installed on the safety box of the present embodiment, and the safety exhaust valve 124 is used to discharge the gas out of the compartment. Furthermore, an explosion-proof valve 125 is provided on the safety box 121 of the present embodiment, and the explosion-proof valve 125 is passively opened when the air pressure reaches the set second air pressure threshold. A releaser for releasing fire-fighting medium is provided in the top functional compartment 120 of the present embodiment. Specifically, the releaser of the present embodiment is an aerosol releaser, which can start the releaser to release the fire-fighting medium after the explosion-proof valve 125 is passively opened, so that the fire-fighting medium fills the top functional compartment 120. A liquid level sensor for measuring the liquid level height is provided in the safety box 121 and / or on the top of the immersion channel 112. Specifically, in this embodiment, liquid level sensors are respectively provided in the safety box 121 and the immersion channel 112. When the energy storage device is in normal operating conditions, the liquid level of the temperature control medium in the immersion channel 112 is measured in real time by the liquid level sensor provided in the immersion channel 112; when the energy storage device is in the first-level fire-fighting operating condition, the second-level fire-fighting operating condition and the third-level fire-fighting operating condition, the temperature control medium enters the safety box 121. At this time, the liquid level of the temperature control medium is detected by the liquid level sensor provided in the safety box 121.

[0071] 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. An energy storage module bottom plate, characterized in that: A flow dividing channel is provided on the upper surface of the bottom plate, and the flow dividing channel includes two side flow dividing channels respectively located on both sides of the upper surface of the bottom plate and at least one middle flow dividing channel located between the two side flow dividing channels; a distribution channel is provided at the front end of the bottom plate; the middle flow dividing channel and the side flow dividing channel are both connected to the distribution channel, and the middle flow dividing channel and the side flow dividing channel both extend backward from the distribution channel to the rear end of the bottom plate; Middle flow holes are arranged at intervals on the side walls on both sides of the middle flow channel; and side flow holes are arranged at intervals on the inner side walls of the side flow channels facing the middle flow channel.

2. The energy storage module bottom plate according to claim 1, characterized in that: The width of the middle diversion channel gradually increases from front to back or from back to front.

3. The energy storage module bottom plate according to claim 2, characterized in that: The angle between the side walls of the middle diversion channel is 1°-5°.

4. The energy storage module bottom plate according to claim 2, characterized in that: The ratio between the maximum width and the minimum width of the middle diversion channel is 2-5.

5. The energy storage module bottom plate according to claim 1, characterized in that: The width of the side shunt channel gradually increases along a direction from front to back or from back to front.

6. The energy storage module bottom plate according to claim 5, characterized in that: The included angle between the inner wall and the outer wall of the side diversion channel is 0.2°-1°.

7. The energy storage module bottom plate according to claim 5, characterized in that: The ratio between the maximum width and the minimum width of the side shunt channel is 1-2.

8. The energy storage module bottom plate according to claim 1, characterized in that: The center line of the middle shunt channel is perpendicular to the distribution channel; the center axis or the outer side wall of the side shunt channel is perpendicular to the distribution channel.

9. The energy storage module bottom plate according to claim 1, characterized in that: A support area is provided between two adjacent flow diversion channels, and an array of support protrusions that protrude upward and are used to support the energy storage unit are provided in the support area.

10. The energy storage module bottom plate according to claim 9, characterized in that: The supporting protrusions are provided with crisscross bottom plate channels through which the temperature control medium can flow.

11. The energy storage module bottom plate according to claim 10, characterized in that: The support protrusions are arranged in an array along directions parallel to and perpendicular to the diversion channel, the bottom plate channel includes a first bottom plate channel parallel to the diversion channel and a second bottom plate channel perpendicular to the first bottom plate channel, the width of the first bottom plate channel gradually increases from front to back or from back to front; among two adjacent second bottom plate channels, the width of the second bottom plate channel close to the rear end is greater than or smaller than the width of the second bottom plate channel close to the front end.

12. The energy storage module bottom plate according to claim 9, characterized in that: The supporting protrusion is provided with a supporting column for supporting the energy storage unit.

13. The energy storage module bottom plate according to claim 1, characterized in that: The middle flow distribution channel and the side flow distribution channel are both groove-shaped structures arranged on the upper surface of the bottom plate; or, the middle flow distribution channel and the side flow distribution channel are both pipe structures arranged on the upper surface of the bottom plate.

14. The energy storage module bottom plate according to claim 1, characterized in that: The distribution channel is a groove-shaped structure arranged on the upper surface of the base plate, and a front cover plate is provided on the distribution channel. The front cover plate covers the distribution channel, and a liquid inlet is provided on the front cover plate; or, the distribution channel is a pipe structure arranged on the upper surface of the base plate, and a liquid inlet is provided on the distribution channel.

15. The energy storage module bottom plate according to any one of claims 1 to 14, characterized in that: An overflow structure is provided at the edge of the lower surface of the bottom plate, and the overflow structure is configured as an overflow notch or an overflow hole.

16. The energy storage module bottom plate according to claim 15, characterized in that: The overflow structures are provided in at least two and are spaced apart at the lower surface edge of the bottom plate.

17. The energy storage module bottom plate according to claim 15, characterized in that: The overflow structure is arranged on the rear edge of the lower surface of the bottom plate.

18. An energy storage module, characterized in that: Comprising the energy storage module bottom plate as described in any one of claims 1-17.

19. An injection mold, characterized in that: Used to produce the energy storage module bottom plate as described in any one of claims 1-17.

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