Energy storage module and energy storage equipment

Abstract

The utility model provides an energy storage module and energy storage equipment. The energy storage module comprises a packaging assembly, a battery cell and a liquid storage assembly; the plurality of battery cells are arranged in the packaging assembly and are arranged in parallel; the liquid storage assembly comprises a film body and a liquid absorption component, the film body is arranged between two adjacent battery cells in the plurality of battery cells, the film body is provided with a cavity, the liquid absorption component is arranged in the cavity, and the liquid absorption component is used for absorbing liquid. When one of the plurality of battery cells generates thermal runaway, the liquid storage assembly can absorb heat generated by the thermal runaway battery cell, so that the temperature rise of the thermal runaway battery cell can be reduced by arranging the liquid storage assembly between the adjacent battery cells, the internal pressure of the thermal runaway battery cell is further reduced, and the safety of the energy storage module in the use process is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and more specifically, to an energy storage module and an energy storage device. Background Technology

[0002] Currently, in related technologies, battery modules consist of multiple cells arranged in parallel. Adjacent cells are separated by thermal insulation components made of highly insulating and heat-resistant materials. When a cell experiences thermal runaway, the insulation components prevent the heat generated by the runaway cell from being transferred to adjacent cells, thus reducing the probability of adjacent cells also experiencing thermal runaway. However, because the insulation components prevent the heat generated by the runaway cell from being transferred to the surrounding environment, the temperature of the runaway cell rises sharply, and its internal pressure also increases. Once the internal pressure of the runaway cell reaches a certain threshold, the pressure relief valve ruptures, and the cell ejects high-temperature flammable gas. This gas ignites upon contact with oxygen in the air, potentially leading to an explosion, which reduces the safety of the battery module. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, the first aspect of this utility model proposes an energy storage module.

[0005] The second aspect of this utility model proposes an energy storage device.

[0006] In view of the above, the first aspect of the present invention provides an energy storage module, including a packaging assembly, battery cells and a liquid storage assembly; multiple battery cells are disposed in the packaging assembly and arranged in parallel; the liquid storage assembly includes a membrane and a liquid absorption component, the membrane is disposed between two adjacent battery cells, the membrane has a cavity, and the liquid absorption component is disposed in the cavity, the liquid absorption component is used to absorb liquid.

[0007] The energy storage module provided in this application includes a packaging assembly and battery cells. There are multiple battery cells arranged side by side in the packaging assembly, thereby positioning and protecting the battery cells through the packaging assembly, reducing the external impact on the battery cells, and lowering the probability of thermal runaway caused by mechanical abuse of the battery cells. The liquid storage component includes a membrane and a liquid absorption component. The membrane is disposed between two adjacent cells in a plurality of cells. The membrane has a cavity, and the liquid absorption component is disposed within the cavity. The liquid absorption component is used to adsorb liquid. After a cell experiences thermal runaway, the heat released by the cell will be absorbed by the liquid adsorbed by the liquid absorption component. After absorbing heat, the liquid adsorbed by the liquid absorption component is converted into gas. The heat energy absorbed by the liquid is converted into its own potential energy, thereby reducing the heat transferred to the cells adjacent to the thermally runaway cell, reducing the probability of the adjacent cells also experiencing thermal runaway, and preventing the spread of thermal runaway between cells. Furthermore, the liquid storage component between adjacent cells can also reduce the transfer of heat generated by the thermally runaway cell to other electrical components of the energy storage module, reducing the losses caused by thermal runaway of the energy storage module.

[0008] When one of the multiple battery cells experiences thermal runaway, the liquid storage component absorbs the heat generated by that cell. Therefore, placing a liquid storage component between adjacent cells can reduce the temperature rise of the thermally runaway cell, thereby reducing its internal pressure. This reduced internal pressure decreases the probability of the cell ejecting flammable gases due to excessive internal pressure, thus lowering the probability of the energy storage module burning or exploding. It also reduces the probability of damage to non-thermally runaway cells and components due to the runaway cell, improving the safety of the energy storage module during use. Even in cases of thermal abuse, placing a liquid storage component between adjacent cells can effectively delay thermal runaway; similarly, even in cases of mechanical abuse, it can effectively prevent thermal runaway between adjacent cells.

[0009] The membrane is positioned between adjacent cells in a multi-cell battery pack. The membrane has a cavity, and a liquid-absorbing component is located within the cavity. In the event of thermal runaway in a cell, the liquid absorbed by the liquid-absorbing component transforms into gas, which remains within the membrane cavity. Once the thermally runaway cell is brought under control or removed, the gas temperature within the cavity decreases, causing the gas to liquefy again and be absorbed by the liquid-absorbing component. This allows the liquid storage module to return to its state before the cell's thermal runaway, enabling reuse and extending its lifespan. Furthermore, the placement of the liquid-absorbing component within the cavity reduces the natural evaporation of the liquid absorbed during daily use, further extending the module's lifespan and enhancing its heat absorption capacity after a period of use.

[0010] A membrane is positioned between adjacent cells in a multi-cell battery pack. The membrane has a cavity, and a liquid-absorbing component is housed within the cavity. Both the liquid-absorbing component and the membrane possess thermal conductivity. During normal operation of the energy storage module, the liquid-absorbing component acts as a heat-conducting medium to accelerate heat dissipation from the cells, thereby preventing heat accumulation within the cells, reducing temperature rise during use, and lowering the probability of thermal runaway. Furthermore, because the liquid-absorbing component reduces temperature rise during use, it also improves the performance of the energy storage device, reduces heat dissipation costs, and enhances the overall quality of the energy storage module. Since the liquid-absorbing component acts as a heat-conducting medium to accelerate heat dissipation, thicker insulation components are no longer needed between adjacent cells. This reduces the distance between cells at risk of thermal runaway and adjacent cells, thereby reducing the volume and weight of the energy storage module and increasing its energy density.

[0011] Because the liquid storage component acts as a heat-conducting medium to accelerate heat dissipation from the battery cells, the temperature of multiple cells in the energy storage module is more consistent, thereby improving the performance of the energy storage module. Furthermore, the liquid storage component has a high insulation rating, thus improving the insulation effect between adjacent cells.

[0012] Specifically, the energy storage module is a battery module, and the battery cell is a battery cell.

[0013] Furthermore, the width of the gap between two adjacent cells in a plurality of cells is less than or equal to 2 millimeters.

[0014] Furthermore, the wall with the largest area among the multiple walls of the battery cell is the first wall, and the first walls of two adjacent battery cells are in contact with each other. The liquid storage assembly is disposed between the first walls of two adjacent battery cells.

[0015] In some technical solutions of this utility model, optionally, the membrane body includes a first membrane body and a second membrane body, the second membrane body and the first membrane body surround a cavity, and a portion of the length of the end of the second membrane body is in contact with the first membrane body.

[0016] In this technical solution, the membrane body includes a first membrane body and a second membrane body. The second membrane body and the first membrane body form a cavity, which in turn accommodates the liquid absorption component, thereby protecting the liquid absorption component and reducing the probability that the liquid adsorbed by the liquid absorption component will enter the air due to evaporation.

[0017] The end portion of the second membrane is attached to the first membrane. During thermal runaway of the battery cell, the liquid adsorbed by the liquid-absorbing component vaporizes due to the heat released by the runaway cell. When the heat released by the runaway cell is significant, the amount of liquid vaporized by the liquid-absorbing component is also significant, leading to an increase in both temperature and pressure within the cavity. When the temperature within the cavity exceeds the membrane's withstand limit, or the pressure within the cavity exceeds the membrane's withstand limit, the adhesion between the first and second membranes will break, and the vaporized liquid will be released into the air. Because the vaporized liquid is released into the air, a gap exists between the runaway cell and adjacent cells, reducing the rate of heat transfer between them. This reduces the probability of damage to non-runaway cells and components in the energy storage module due to the runaway cell, thus improving the safety of the energy storage module during use.

[0018] Furthermore, since the vaporized liquid is released into the air, the gas released into the air can carry and release a large amount of heat, thereby reducing the probability of the battery cell injecting flammable gas and reducing the probability of the energy storage module burning or exploding due to the battery cell injecting flammable gas.

[0019] Furthermore, during normal operation of the energy storage module, the liquid storage component transfers heat from the hotter side to the colder side. When the temperature of one side of the liquid storage component rises abnormally and rapidly, it transfers some heat to the other side. Some of this heat is converted into a temperature rise in the liquid-absorbing component or causes the liquid to change from a liquid to a gaseous state. If all the stored liquid evaporates or the temperature at the weld between the first and second membranes exceeds the membrane's temperature resistance, the weld layer is damaged, releasing gas and forming a void for thermal insulation. In both of these processes, the temperature of the thermally runaway cell can be effectively reduced, or the thermally runaway cell can be prevented from opening its valve or from opening its valve but not spraying a flame, thus avoiding thermal runaway in adjacent cells.

[0020] Furthermore, the first membrane is sheet-like, the second membrane is also sheet-like, the outer edges of the first membrane and the second membrane are fused together, and a cavity is formed in the middle of the first membrane and the middle of the second membrane.

[0021] In some technical solutions of this utility model, optionally, the membrane body includes a first membrane layer, an aluminum-plated layer and a second membrane layer, with the aluminum-plated layer attached to the first membrane layer; the second membrane layer is attached to the aluminum-plated layer and located on the side of the aluminum-plated layer away from the first membrane layer.

[0022] In this technical solution, the membrane body includes a first membrane layer and an aluminum-plated layer. The aluminum-plated layer is adhered to the first membrane layer, enabling rapid heat transfer and more uniform heating across the membrane body. This allows the membrane layer to more evenly transfer the heat from the battery cell to the liquid-absorbing component. During normal operation of the energy storage module, the membrane layer's more even heat transfer to the liquid-absorbing component results in higher heat dissipation efficiency and faster heat dissipation, thereby reducing the temperature rise of the battery cell. When at least one of the multiple battery cells experiences thermal runaway, the aluminum-plated layer can more evenly transfer the heat generated by the runaway cell to the liquid-absorbing component. This results in a larger heated area for the liquid-absorbing component and higher vaporization efficiency of the adsorbed liquid. Consequently, the liquid storage component can more quickly dissipate the heat released by the runaway cell, further enhancing the safety of the energy storage module during use.

[0023] The first and second membrane layers protect the aluminum-plated membrane layer from damage caused by external impacts; and the first and second membrane layers also give the membrane a certain strength, thereby reducing the probability of damage to the liquid storage component.

[0024] Furthermore, the first and second film layers are plastic films, the aluminum plating layer is electroplated on the first film layer, and the second film layer is attached to the outside of the aluminum plating layer.

[0025] In some technical solutions of this utility model, optionally, the membrane body is a flexible membrane; the liquid absorption component is an elastic element, and the elastic element is in a compressed state.

[0026] In this technical solution, the membrane is a flexible membrane, and the liquid absorption component is an elastic element, giving the liquid storage assembly a certain degree of elasticity. After the liquid storage assembly is installed in the gap between multiple battery cells, the elastic element is in a compressed state, allowing the liquid storage assembly to apply an elastic force to the battery cells, thereby making the battery cells more stably fixed in the housing and improving the stability of the energy storage module during operation.

[0027] Furthermore, the liquid-absorbing component is a hydrogel, which absorbs water and is then placed inside the cavity of the membrane.

[0028] When a battery cell experiences thermal runaway, the liquid storage component utilizes the high latent heat and high specific heat of water to convert some of the heat generated during thermal runaway into gaseous water, thereby reducing the temperature of the thermal runaway battery cell and preventing thermal runaway from occurring in other battery cells.

[0029] When the energy storage module is working normally, the liquid storage component is used as an insulating and thermally conductive material. The thermal conductivity of the liquid storage component is about 1 watt per meter per Kelvin (W / (m·K)).

[0030] In some technical solutions of this utility model, optionally, the liquid storage component is bonded to the battery cell; and / or the liquid storage component is sandwiched between two adjacent battery cells among a plurality of battery cells.

[0031] In this technical solution, the liquid storage component is bonded to the battery cell, thereby achieving a connection between the liquid storage component and the battery cell and further improving the stability of the battery cell and the liquid storage component. Furthermore, the liquid storage component can be bonded to the battery cell using double-sided adhesive. Alternatively, the liquid storage component can be bonded to the battery cell using a coated adhesive.

[0032] The liquid storage component is sandwiched between two adjacent cells in a series of cells, and is installed and fixed by the friction between the liquid storage component and the cell, thereby further improving the stability of the cell and the liquid storage component.

[0033] In some technical solutions of this utility model, optionally, the packaging assembly includes multiple end plates and fastening straps; the multiple end plates are respectively disposed on both sides of multiple battery cells; the fastening straps are arranged around the multiple end plates and multiple battery cells to fix the multiple battery cells.

[0034] In this technical solution, multiple end plates are respectively set on both sides of multiple battery cells; fastening straps are arranged around the multiple end plates and multiple battery cells to fix the battery cells and further improve the stability of the battery cells. End plates are set on both sides of the battery cells, which can support the electrical components or electrodes of the energy storage module. The fastening straps are arranged around the outside of the end plates and clamp the battery cells through the end plates, so that the battery cells are subjected to a more uniform clamping force from the fastening straps, reducing the pressure on the battery cells and reducing the probability of local damage to the battery cells.

[0035] Furthermore, the fastening band is made of steel. Multiple cells are tightened with the steel band to provide pre-pressure to the end plate. The liquid storage assembly can withstand a portion of the compression, creating a rebound force that balances the clamping force of the end plate.

[0036] Optionally, in some technical solutions of this utility model, the packaging assembly further includes a first insulating plate and a second insulating plate; the first insulating plate is disposed between the end plate and the battery cell; the second insulating plate is disposed on the top of the multiple battery cells and / or the bottom of the multiple battery cells.

[0037] In this technical solution, a first insulating plate is disposed between the end plate and the battery cell, improving the insulation effect between the battery cell and the end plate, thereby enhancing the safety of the energy storage module during use. A second insulating plate is disposed on the top and / or bottom of multiple battery cells, improving the insulation efficiency of the top and / or bottom of the battery cells, further enhancing the safety of the energy storage module during use.

[0038] Specifically, both the first and second insulating boards are plastic boards, such as PC boards.

[0039] Specifically, there are two second insulating plates, which are respectively placed at the top and bottom of the battery cell.

[0040] Optionally, in some technical solutions of this utility model, the energy storage module further includes a conductive component, which is electrically connected to the battery cell and extends to the side of one of the multiple end plates.

[0041] In this technical solution, the conductive component is electrically connected to the battery cell and extends to the side of one of the multiple end plates, which facilitates the energy storage module to be electrically connected to external electrical devices.

[0042] Furthermore, the conductive components include the module positive electrode and the module negative electrode.

[0043] Furthermore, the conductive components are integrally molded with the plastic block and fixed to the battery cell, and the plastic block integrates sensors capable of collecting voltage and temperature.

[0044] In some technical solutions of this utility model, optionally, the packaging component includes a shell and a cover. The shell is provided with an installation cavity with an opening on one side, and multiple battery cells are disposed in the installation cavity. The cover is connected to the shell and is placed over the opening.

[0045] In this technical solution, the housing is provided with an installation cavity with an opening on one side, and multiple battery cells are installed in the installation cavity. The cover is connected to the housing and is placed at the opening. The battery cells are installed and fixed through the housing and the cover, thereby improving the stability of the battery cells during the use of the energy storage module.

[0046] Furthermore, the cells are integrated directly into the battery pack (cell-to-pack, CTP), with a liquid reservoir between adjacent cells. A liquid reservoir can also be placed between adjacent battery packs.

[0047] Optionally, in some technical solutions of this utility model, the energy storage module further includes a bridging component, which is electrically connected to two adjacent cells among a plurality of cells, and the bridging component is provided with a protrusion protruding away from the cell, the protrusion being disposed opposite to the liquid storage component.

[0048] In this technical solution, the bridging component is electrically connected to two adjacent battery cells, thereby achieving electrical connection between adjacent battery cells. The bridging component is provided with a protrusion that protrudes away from the battery cell. The protrusion is positioned opposite to the liquid storage component, thereby allowing the bridging component to avoid the liquid storage component and improving the insulation effect between the bridging component and the liquid storage component.

[0049] Furthermore, the bridging component is an aluminum busbar or a copper busbar.

[0050] The bridging component is used to connect the positive and negative terminals of two adjacent battery cells.

[0051] The bridging component is connected to the positive and negative terminals of the battery cell by welding.

[0052] The second aspect of this utility model provides an energy storage device, including an energy storage module as described in any of the above technical solutions, and therefore the energy storage device possesses all the beneficial effects of the energy storage module as described in any of the above technical solutions.

[0053] Specifically, the energy storage device is a household battery.

[0054] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0055] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0056] Figure 1 This is one of the structural schematic diagrams of an energy storage module according to an embodiment of the present invention;

[0057] Figure 2 This is a front view of an energy storage module according to an embodiment of the present invention;

[0058] Figure 3 This is one of the cross-sectional views of an energy storage module according to an embodiment of the present invention;

[0059] Figure 4 This is a cross-sectional view of a liquid storage assembly according to an embodiment of the present invention;

[0060] Figure 5 This is a schematic diagram of the structure of a membrane according to an embodiment of the present invention;

[0061] Figure 6 This is a second schematic diagram of the structure of an energy storage module according to an embodiment of the present invention;

[0062] Figure 7 This is a second cross-sectional view of an energy storage module according to an embodiment of the present invention;

[0063] Figure 8 This is a partial schematic diagram of an energy storage module according to an embodiment of the present invention.

[0064] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0065] 100 Packaging assembly, 110 End plate, 120 Fastening strap, 130 First insulating plate, 140 Second insulating plate, 150 Housing, 152 Mounting cavity, 160 Cover, 170 Opening, 200 Battery cell, 300 Liquid storage assembly, 310 Membrane, 312 First membrane layer, 314 Aluminized layer, 316 Second membrane layer, 320 Liquid absorption component, 330 Cavity, 340 First membrane, 350 Second membrane, 400 Conductive component, 410 Module negative electrode, 420 Module positive electrode, 500 Bridging component, 510 Protrusion, 600 Plastic block. Detailed Implementation

[0066] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0067] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0068] The following reference Figures 1 to 8 This invention describes energy storage modules and energy storage devices according to some embodiments of the present invention.

[0069] In one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an energy storage module is provided, including a packaging assembly 100, battery cells 200, and a liquid storage assembly 300; multiple battery cells 200 are disposed in the packaging assembly 100 and arranged in parallel; the liquid storage assembly 300 includes a membrane 310 and a liquid absorption component 320, the membrane 310 is disposed between two adjacent battery cells 200, the membrane 310 is provided with a cavity 330, and the liquid absorption component 320 is disposed in the cavity 330 for absorbing liquid.

[0070] In this embodiment, the energy storage module includes a packaging component 100 and battery cells 200. There are multiple battery cells 200 arranged side by side within the packaging component 100. The packaging component 100 can then position and protect the battery cells 200, reduce the external impact on the battery cells 200, and lower the probability of thermal runaway caused by mechanical abuse. The liquid storage assembly 300 includes a membrane 310 and a liquid absorption component 320. The membrane 310 is disposed between two adjacent cells 200 in a plurality of cells 200. The membrane 310 is provided with a cavity 330, and the liquid absorption component 320 is disposed in the cavity 330. The liquid absorption component 320 is used to absorb liquid. After the cell 200 thermally runs away, the heat released by the cell 200 will be absorbed by the liquid absorbed by the liquid absorption component 320. After absorbing the heat, the liquid absorbed by the absorption component is converted into gas. The heat energy absorbed by the liquid is converted into its own potential energy, thereby reducing the heat transferred to the cells 200 adjacent to the thermally runaway cell 200, reducing the probability that the cells 200 adjacent to the thermally runaway cell 200 will also thermally run away, and preventing the thermal runaway from spreading between the cells 200. In addition, the liquid storage assembly 300 between adjacent cells 200 can also reduce the heat generated by the thermally runaway cell 200 to other electrical components of the energy storage module, reducing the loss caused by thermal runaway of the energy storage module.

[0071] When one of the multiple battery cells 200 experiences thermal runaway, the liquid storage component 300 absorbs the heat generated by the runaway cell 200. Therefore, placing the liquid storage component 300 between adjacent cells 200 can reduce the temperature rise of the runaway cell 200, thereby reducing its internal pressure. This reduction in internal pressure decreases the probability of the cell 200 ejecting flammable gases due to excessive internal pressure, thus lowering the probability of combustion or explosion of the energy storage module. It also reduces the probability of damage to non-runaway cells 200 and other components in the energy storage module due to the runaway cell 200, improving the safety of the energy storage module during use. Even in cases of thermal abuse, placing the liquid storage component 300 between adjacent cells can effectively delay thermal runaway; even in cases of mechanical abuse, placing the liquid storage component 300 between adjacent cells can effectively prevent thermal runaway between adjacent cells.

[0072] A membrane 310 is disposed between two adjacent cells 200 in a plurality of cells 200. The membrane 310 has a cavity 330, and a liquid-absorbing component 320 is disposed within the cavity 330. When a cell 200 experiences thermal runaway, the liquid absorbed by the liquid-absorbing component 320 is converted into gas, which remains within the cavity 330 of the membrane 310. After the thermally runaway cell 200 is brought under control or removed, the gas temperature within the cavity 330 decreases, the gas liquefies again, and is absorbed by the liquid-absorbing component 320, allowing the liquid storage assembly 300 to return to its state before the thermal runaway of the cell 200. This enables the liquid storage assembly 300 to be reused, extending its service life. Furthermore, the liquid-absorbing component 320 being disposed within the cavity 330 reduces the natural evaporation of the liquid absorbed by the liquid-absorbing component 320 during daily use of the energy storage module, further extending the service life of the liquid storage assembly 300 and improving its heat absorption capacity after a period of use.

[0073] The membrane 310 is disposed between two adjacent cells 200 in a plurality of cells 200. The membrane 310 is provided with a cavity 330, and the liquid absorption component 320 is disposed in the cavity 330. Both the liquid absorption component 320 and the membrane 310 have a certain thermal conductivity. During the daily use of the energy storage module, the liquid storage component 300 can act as a heat transfer medium to accelerate the heat dissipation of the cell 200, thereby preventing heat from accumulating in the cell 200, reducing the temperature rise of the cell 200 during use, and reducing the probability of thermal runaway of the cell 200. Furthermore, since the liquid storage component 300 can reduce the temperature rise of the cell 200 during use, it can also improve the performance of the energy storage device, reduce the heat dissipation cost of the energy storage module, and improve the quality of the energy storage module. Since the liquid storage component 300 can act as a heat-conducting medium to accelerate the heat dissipation of the battery cell 200, there is no need to install a thick heat insulation component between adjacent battery cells 200. Therefore, the distance between the thermally runaway battery cell 200 and the adjacent battery cell 200 can be reduced, thereby reducing the volume of the energy storage module, reducing the weight of the energy storage module, and increasing the energy density of the energy storage module.

[0074] Because the liquid storage component 300 can act as a heat-conducting medium to accelerate the heat dissipation of the battery cell 200, the temperature of the multiple battery cells in the energy storage module has better consistency, thereby improving the performance of the energy storage module. Furthermore, the liquid storage component 300 has a high insulation level, thereby improving the insulation effect between adjacent battery cells.

[0075] Specifically, the energy storage module is a battery module, and cell 200 is a battery cell.

[0076] Furthermore, the width of the gap between two adjacent cells 200 in the plurality of cells 200 is less than or equal to 2 millimeters.

[0077] Furthermore, the wall with the largest area among the multiple walls of the battery cell 200 is the first wall, and the first walls of two adjacent battery cells 200 are in contact with each other. The liquid storage assembly 300 is disposed between the first walls of two adjacent battery cells 200.

[0078] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0079] like Figure 1 and Figure 4 As shown, the membrane 310 includes a first membrane 340 and a second membrane 350. The second membrane 350 and the first membrane 340 form a cavity 330, and a portion of the length of the end of the second membrane 350 is in contact with the first membrane 340.

[0080] In this embodiment, the membrane 310 includes a first membrane 340 and a second membrane 350. The second membrane 350 and the first membrane 340 form a cavity 330, which in turn accommodates the liquid-absorbing component 320, thereby protecting the liquid-absorbing component 320 and reducing the probability that the liquid adsorbed by the liquid-absorbing component 320 will enter the air due to evaporation.

[0081] The end portion of the second membrane 350 is in contact with the first membrane 340. When the battery cell 200 experiences thermal runaway, the liquid adsorbed by the liquid-absorbing component 320 vaporizes due to the heat released by the thermally runaway battery cell 200. When the heat released by the thermally runaway battery cell 200 is large, the amount of liquid vaporized by the liquid-absorbing component 320 is also large, which in turn causes the temperature and pressure inside the cavity 330 to rise. When the temperature inside the cavity 330 exceeds the temperature limit that the membrane 310 can withstand, or when the pressure inside the cavity 330 exceeds the pressure limit that the membrane 310 can withstand, the joint between the first membrane 340 and the second membrane 350 will be destroyed, and the vaporized liquid will be released into the air. Because the vaporized liquid is released into the air, there is a gap between the thermally runaway cell 200 and the adjacent cells 200, which reduces the rate of heat transfer between the thermally runaway cell 200 and the adjacent cells 200. This reduces the probability of damage to the non-thermally runaway cells 200 and electrical components in the energy storage module due to the thermally runaway cells 200, thus improving the safety of the energy storage module during use.

[0082] Furthermore, since the vaporized liquid is released into the air, the gas released into the air can carry and release a large amount of heat, thereby reducing the probability of the cell 200 injecting combustible gas and reducing the probability of the energy storage module burning or exploding due to the cell 200 injecting combustible gas.

[0083] Furthermore, during normal operation of the energy storage module, the liquid storage component 300 transfers heat from the hotter side to the colder side. When the temperature of one side of the liquid storage component 300 rises abnormally and rapidly, the liquid storage component 300 transfers some heat to the other side, and some of the heat is converted into a temperature rise in the liquid absorption component 320 or causes the liquid to change from a liquid state to a gas state. If all the liquid stored therein evaporates or the temperature at the weld between the first membrane 340 and the second membrane 350 exceeds the temperature resistance of the membrane 310, the weld layer is destroyed, releasing gas and forming a gap for thermal insulation. In the above two processes, the temperature of the thermally runaway cell 200 can be effectively reduced, or the thermally runaway cell 200 can be prevented from opening its valve or from opening its valve but not spraying flame, thus avoiding thermal runaway of the adjacent first cell 200 and second cell 200.

[0084] Furthermore, the first membrane 340 is sheet-like, and the second membrane 350 is also sheet-like. The outer edges of the first membrane 340 and the second membrane 350 are fused together, and a cavity 330 is formed in the middle of the first membrane 340 and the middle of the second membrane 350.

[0085] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0086] like Figure 1 and Figure 5 As shown, the membrane 310 includes a first membrane layer 312, an aluminum-plated layer 314, and a second membrane layer 316. The aluminum-plated layer 314 is attached to the first membrane layer 312; the second membrane layer 316 is attached to the aluminum-plated layer 314 and is located on the side of the aluminum-plated layer 314 away from the first membrane layer 312.

[0087] In this embodiment, the membrane 310 includes a first membrane layer 312 and an aluminum-plated layer 314. The aluminum-plated layer 314 is attached to the first membrane layer 312. The aluminum-plated layer 314 enables the membrane 310 to transfer heat quickly and makes the heating of each area of ​​the membrane 310 more uniform. This allows the membrane layer to transfer the heat of the battery cell 200 to the liquid-absorbing component 320 more evenly. During normal operation of the energy storage module, the membrane layer transfers the heat of the battery cell 200 to the liquid-absorbing component 320 more evenly, resulting in higher heat dissipation efficiency and faster heat dissipation of the battery cell 200, thereby reducing the temperature rise of the battery cell 200. When at least one of the multiple battery cells 200 experiences thermal runaway, the aluminum plating layer 314 can more evenly transfer the heat generated by the thermally runaway battery cell 200 to the liquid absorption component 320, thereby increasing the heated area of ​​the liquid absorption component 320 and increasing the vaporization efficiency of the liquid absorbed by the liquid absorption component 320. This allows the liquid storage component 300 to consume the heat released by the thermally runaway battery cell 200 more quickly, further improving the safety of the energy storage module during use.

[0088] The first film layer 312 and the second film layer 316 can protect the aluminum-plated film layer and prevent the film body 310 from being damaged by external impact; and the first film layer 312 and the second film layer 316 give the film body 310 a certain strength, thereby reducing the probability of damage to the liquid storage component 300.

[0089] Furthermore, the first film layer 312 and the second film layer 316 are plastic films, the aluminum plating layer 314 is electroplated on the first film layer 312, and the second film layer 316 is attached to the outside of the aluminum plating layer 314.

[0090] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0091] The membrane 310 is a flexible membrane; the liquid-absorbing component 320 is an elastic element, and the elastic element is in a compressed state.

[0092] In this embodiment, the membrane 310 is a flexible membrane, and the liquid-absorbing component 320 is an elastic element, giving the liquid storage assembly 300 a certain degree of elasticity. After the liquid storage assembly 300 is installed in the gap between the multiple battery cells 200, the elastic element is in a compressed state, allowing the liquid storage assembly 300 to apply an elastic force to the battery cells 200, thereby enabling the battery cells 200 to be more stably fixed within the housing 150 and improving the stability of the energy storage module during operation.

[0093] Furthermore, the liquid-absorbing component 320 is a hydrogel, which absorbs water and is placed inside the cavity 330 of the membrane 310.

[0094] When a battery cell experiences thermal runaway, the liquid storage component 300 utilizes the high latent heat and high specific heat of water to convert some of the heat generated during the thermal runaway of the battery cell into gaseous water, thereby reducing the temperature of the thermal runaway battery cell itself and preventing other battery cells from experiencing thermal runaway.

[0095] When the energy storage module is working normally, the liquid storage component 300 is used as an insulating and thermally conductive material. The thermal conductivity of the liquid storage component 300 is about 1 watt per meter per Kelvin (W / (m·K)).

[0096] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0097] like Figure 1 and Figure 2 As shown, the liquid storage assembly 300 is bonded to the battery cell 200; and / or the liquid storage assembly 300 is sandwiched between two adjacent battery cells 200 in a plurality of battery cells 200.

[0098] In this embodiment, the liquid storage component 300 is bonded to the battery cell 200, thereby achieving the connection between the liquid storage component 300 and the battery cell 200, and further improving the stability of the battery cell 200 and the liquid storage component 300. Furthermore, the liquid storage component 300 can be bonded to the battery cell 200 using double-sided adhesive. Alternatively, the liquid storage component 300 can be bonded to the battery cell 200 using a coated adhesive.

[0099] The liquid storage component 300 is sandwiched between two adjacent battery cells 200, and is installed and fixed by the friction between the liquid storage component 300 and the battery cell 200, thereby further improving the stability of the battery cell 200 and the liquid storage component 300.

[0100] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0101] like Figure 1 and Figure 6 As shown, the packaging assembly 100 includes multiple end plates 110 and fastening straps 120; the multiple end plates 110 are respectively disposed on both sides of multiple battery cells 200; the fastening straps 120 are arranged around the multiple end plates 110 and the multiple battery cells 200 to fix the multiple battery cells 200.

[0102] In this embodiment, multiple end plates 110 are respectively disposed on both sides of multiple battery cells 200; fastening straps 120 are arranged around the multiple end plates 110 and multiple battery cells 200 to fix the battery cells 200 and further improve the stability of the battery cells 200. End plates 110 are disposed on both sides of the battery cells 200, and the end plates 110 can support the electrical components or electrodes of the energy storage module. The fastening straps 120 are arranged around the outside of the end plates 110, and the fastening straps 120 clamp the battery cells 200 through the end plates 110, so that the battery cells 200 are subjected to a more uniform clamping force from the fastening straps 120, reducing the pressure on the battery cells 200 and reducing the probability of local damage to the battery cells 200.

[0103] Furthermore, the fastening band 120 is a steel band. Multiple battery cells 200 are tightened with the steel band to provide pre-pressure to the end plate 110. The liquid storage assembly 300 can withstand a portion of the compression, forming a rebound force that balances the clamping force of the end plate 110.

[0104] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0105] like Figure 3 and Figure 6As shown, the packaging assembly 100 also includes a first insulating plate 130 and a second insulating plate 140; the first insulating plate 130 is disposed between the end plate 110 and the battery cell 200; the second insulating plate 140 is disposed on the top of the plurality of battery cells 200 and / or the bottom of the plurality of battery cells 200.

[0106] In this embodiment, the first insulating plate 130 is disposed between the end plate 110 and the battery cell 200, improving the insulation effect between the battery cell 200 and the end plate 110, thereby enhancing the safety of the energy storage module during use. The second insulating plate 140 is disposed on the top and / or bottom of the plurality of battery cells 200, improving the insulation efficiency of the top and / or bottom of the battery cells 200, further enhancing the safety of the energy storage module during use.

[0107] Specifically, both the first insulating plate 130 and the second insulating plate 140 are plastic plates, such as polycarbonate (PC) plates.

[0108] Specifically, there are two second insulating plates 140, which are respectively disposed at the top and bottom of the battery cell 200.

[0109] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0110] like Figure 1 and Figure 6 As shown, the energy storage module also includes a conductive component 400, which is electrically connected to the battery cell 200 and extends to the side of one of the multiple end plates 110.

[0111] In this embodiment, the conductive component 400 is electrically connected to the battery cell 200 and extends to the side of one of the multiple end plates 110, so that the energy storage module can be electrically connected to external electrical devices.

[0112] Furthermore, the conductive component 400 includes a module positive electrode 420 and a module negative electrode 410.

[0113] Furthermore, the conductive component 400 is integrally formed with the plastic block 600 and fixed on the battery cell 200. The plastic block 600 integrates sensors capable of collecting voltage and temperature.

[0114] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0115] like Figure 7As shown, the packaging assembly 100 includes a housing 150 and a cover 160. The housing 150 is provided with a mounting cavity 152 with an opening 170 on one side, and multiple battery cells 200 are disposed in the mounting cavity 152. The cover 160 is connected to the housing 150 and covers the opening 170.

[0116] In this embodiment, the housing 150 is provided with a mounting cavity 152 with an opening 170 on one side. Multiple battery cells 200 are disposed in the mounting cavity 152. The cover 160 is connected to the housing 150 and is placed at the opening 170. The housing 150 and the cover 160 are used to install and fix the battery cells 200, thereby improving the stability of the battery cells 200 during the use of the energy storage module.

[0117] Furthermore, cell 200 is a cell directly integrated into the battery pack (cell to pack, CTP), and a liquid storage assembly 300 is provided between two adjacent cells. A liquid storage assembly 300 can also be provided between two adjacent battery packs.

[0118] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0119] like Figure 1 and Figure 8 As shown, the energy storage module also includes a bridging component 500, which is electrically connected to two adjacent cells 200 among the plurality of cells 200. The bridging component 500 is provided with a protrusion 510 protruding away from the cell 200, and the protrusion 510 is disposed opposite to the liquid storage component 300.

[0120] In this embodiment, the bridging component 500 is electrically connected to two adjacent battery cells 200, thereby achieving electrical connection between the two adjacent battery cells 200. The bridging component 500 is provided with a protrusion 510 protruding away from the battery cell 200. The protrusion 510 is disposed opposite to the liquid storage assembly 300, thereby allowing the bridging component 500 to avoid the liquid storage assembly 300 through the protrusion 510, improving the insulation effect between the bridging component 500 and the liquid storage assembly 300.

[0121] Furthermore, the bridging component 500 is an aluminum busbar or a copper busbar.

[0122] The bridging component 500 is used to connect the positive and negative terminals of two adjacent cells 200.

[0123] The bridging component 500 is connected to the positive and negative terminals of the battery cell 200 by welding.

[0124] This embodiment provides an energy storage module. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0125] Multiple battery cells 200 are arranged in a row; or multiple battery cells 200 are arranged in multiple rows, with a liquid storage assembly 300 provided between two adjacent rows of battery cells 200.

[0126] In this embodiment, multiple battery cells 200 are arranged in a row, and a liquid storage assembly 300 is provided between two adjacent battery cells 200.

[0127] Multiple battery cells 200 are arranged in multiple rows, with a liquid storage component 300 between two adjacent battery cells 200 and between two adjacent rows of battery cells 200. This further reduces the probability of the energy storage module burning or exploding, and reduces the probability of damage to battery cells 200 that have not thermally runaway and to electrical components in the energy storage module due to thermal runaway battery cells 200, thereby improving the safety of the energy storage module during use.

[0128] Furthermore, the battery cells 200 are arranged in an array, such as in a two-row, eight-column arrangement or a three-row, six-column arrangement.

[0129] In one embodiment of the present invention, an energy storage device is provided, including an energy storage module as described in any of the above embodiments. Therefore, the energy storage device possesses all the beneficial effects of the energy storage module as described in any of the above embodiments.

[0130] Specifically, the energy storage device is a household battery.

[0131] In the claims, description, and accompanying drawings of this utility model, the term "plural" refers to two or more objects. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on this utility model. The terms "connect," "install," "fix," etc., should be interpreted broadly. For example, "connect" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood based on the specific circumstances described above.

[0132] In the claims, description, and drawings of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In the claims, description, and drawings of this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0133] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy storage module, characterized in that, include: Packaging components; Multiple battery cells are disposed in the packaging assembly, and the multiple battery cells are arranged side by side; A liquid storage assembly includes a membrane and a liquid absorption component. The membrane is disposed between two adjacent cells in a plurality of cells. The membrane has a cavity, and the liquid absorption component is disposed within the cavity. The liquid absorption component is used to absorb liquid.

2. The energy storage module according to claim 1, characterized in that, The membrane comprises: First membrane; The second membrane and the first membrane enclose the cavity, and a portion of the length of the end of the second membrane is in contact with the first membrane.

3. The energy storage module according to claim 1, characterized in that, The membrane comprises: First membrane layer; An aluminum plating layer is attached to the first film layer; The second film layer is attached to the aluminum plating layer and is located on the side of the aluminum plating layer away from the first film layer.

4. The energy storage module according to claim 1, characterized in that, The membrane is a flexible membrane; The liquid-absorbing component is an elastic element, and the elastic element is in a compressed state.

5. The energy storage module according to claim 1, characterized in that, The liquid storage assembly is bonded to the battery cell; and / or The liquid storage assembly is sandwiched between two adjacent cells in the plurality of cells.

6. The energy storage module according to claim 1, characterized in that, The packaging component includes: Multiple end plates are respectively disposed on both sides of multiple battery cells; Fastening straps are arranged around the plurality of end plates and the plurality of battery cells to secure the plurality of battery cells.

7. The energy storage module according to claim 6, characterized in that, The packaging component also includes: A first insulating plate is disposed between the end plate and the battery cell; A second insulating plate is disposed on the top of and / or the bottom of the plurality of battery cells.

8. The energy storage module according to claim 6, characterized in that, Also includes: A conductive component, which is electrically connected to the battery cell and extends to the side of one of the plurality of end plates.

9. The energy storage module according to claim 1, characterized in that, The packaging component includes: The housing has a mounting cavity with an opening on one side, and a plurality of the battery cells are disposed in the mounting cavity; A cover body, which is connected to the housing and is placed over the opening.

10. The energy storage module according to any one of claims 1 to 9, characterized in that, Also includes: A bridging component is provided, which is electrically connected to two adjacent cells among the plurality of cells, and the bridging component is provided with a protrusion protruding away from the cell, the protrusion being disposed opposite to the liquid storage assembly.

11. An energy storage device, characterized in that, Includes the energy storage module as described in any one of claims 1 to 10.

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