WO2023046011A1

WO2023046011A1 - Energy storage module and energy storage system

Info

Publication number: WO2023046011A1
Application number: PCT/CN2022/120527
Authority: WO
Inventors: 解凌峰; 严嵘; 龚正大; 章锦; 钱辉; 华黎
Original assignee: 上海奥威科技开发有限公司
Priority date: 2021-09-22
Filing date: 2022-09-22
Publication date: 2023-03-30

Abstract

An energy storage module and an energy storage system. The energy storage module comprises end plates (2), insulating plates (6), and a battery cell group. The end plates (2) are provided at two ends of the energy storage module. The insulating plates (6) are further provided on the inner side of the end plate (2). At least one group of battery cell groups arranged in series and parallel is further provided between the insulating plates (6). The insulating plates (6) may also be replaced by an insulating coating layer coated or injection-molded on the inner side of the end plate. The battery cell group comprises a battery cell (7), a buffer layer (8), a battery cell (7), and a flame-retardant layer (9). The buffer layer (8) is provided between adjacent battery cells (7), and the flame-retardant layer (9) is further provided on the other side of the battery cell (7). The energy storage system (18) comprises an energy storage module, and the energy storage module is mounted according to the mode of at least one layer, at least one row, and at least one column. The present application can expand products of different sizes, reduce the development cost, improve the grouping efficiency of the energy storage module, reduce the number of parts, reduce the cost, and give consideration to both reliability and security. The energy storage system can be assembled on the basis of the energy storage module to adapt to different application scenarios.

Description

An energy storage module and an energy storage system

technical field

The application belongs to the technical field of new energy, and specifically relates to an energy storage module and an energy storage system.

Background technique

Most of the existing energy storage module structures adopt standard module design to adapt to specific technical fields. However, with the expansion of new energy applications, the original standard energy storage modules cannot perfectly adapt to new usage scenarios and cannot meet the needs of the market. Because the existing energy storage modules are not economical and expandable, it is necessary to redesign the energy storage modules, such as adjusting the structure, etc., but the adjustment of the structure requires additional investment in production costs, which may not be able to meet the current requirements. Some market usage requirements may also cause a greater degree of waste of resources.

Contents of the invention

In view of the shortcomings or deficiencies of the above-mentioned prior art, the technical problem to be solved in this application is to provide an energy storage module and an energy storage system.

In order to solve the above technical problems, the application is realized through the following technical solutions:

On the one hand, the present application proposes an energy storage module, including: an end plate, an insulating plate, and a battery pack,

The end plates are arranged at both ends of the energy storage module, the insulating plates are arranged inside the end plates, and at least one set of battery cells arranged in series and parallel is arranged between the insulating plates group, the insulating plate can also be replaced by a layer of insulating material coated or injection molded on the inner side of the end plate;

Wherein, the battery cell group includes: a battery cell, a buffer layer, a battery cell and a flame retardant layer,

The buffer layer is provided between the adjacent battery cells, and the flame retardant layer is also provided on the other side of the battery cells.

Optionally, the above-mentioned energy storage module further includes: a guide tray for guiding, positioning and insulating functions, through which the battery pack is installed between the insulating plates.

Optionally, the above-mentioned energy storage module, wherein, the guide tray is a plastic part.

Optionally, in the above energy storage module, the guide tray is further provided with a cross-pole piece, which is connected to the tab on the battery cell through the cross-pole piece.

Optionally, in the above-mentioned energy storage module, the guide tray is further provided with guide grooves for guiding the tabs.

Optionally, in the above-mentioned energy storage module, the transpole piece is made of aluminum profile.

Optionally, in the above-mentioned energy storage module, a side-mounted integrated outlet seat is further provided on the guide tray.

Optionally, the above-mentioned energy storage module further includes: a bus bar, and the bus bar is connected to the outlet seat on the guide tray.

Optionally, the above-mentioned energy storage module further includes: a radiator, the radiator is detachably installed under the end plate, and there is a thermally conductive material.

Optionally, the above-mentioned energy storage module further includes: a cover plate, and the cover plate is detachably installed above the end plate.

Optionally, the above-mentioned energy storage module, wherein, the cover plate has a concave-shaped structure.

Optionally, the above energy storage module, wherein the bottom of the energy storage module has a concave structure.

Optionally, the above energy storage module, wherein the insulating plate is made of insulating material, wherein the insulating material includes but not limited to FR4 (epoxy glass fiber);

And/or, the cushioning layer is made of a flame-retardant cushioning material, wherein the cushioning material includes but is not limited to PU (polyurethane) foam;

And/or, the flame retardant layer is made of flame retardant material, wherein the flame retardant material includes but not limited to mica, ceramics or silicone rubber.

Optionally, the above-mentioned energy storage module further includes a casing and a panel, the casing and the panel are installed on the outside of the energy storage module, vents are provided on the casing, and At least one electrical interface is reserved on the panel.

Another aspect of the present application also proposes an energy storage system, including the energy storage module, wherein the energy storage modules are combined and installed in at least one layer, at least one row, and at least one column.

Compared with the prior art, the present application has the following technical effects:

The energy storage module of this application includes an end plate, an insulating plate, and a battery core layer. This structure can be expanded for products of different sizes, reducing development costs; and it can also improve the grouping efficiency of the energy storage module, reduce the number of parts, Reduce costs without compromising reliability and security.

In this application, the insulating board includes but is not limited to: FR4, the thickness of the insulating board should ensure sufficient electrical clearance between the end plate and the battery pack, and still have reliability under high-voltage conditions; The buffer layer includes: PU foam with flame retardancy; the buffer layer provides the shear force between the battery packs during assembly to ensure the fixation of the relative position; absorbs the energy of the battery pack during the cycle of the battery pack. Expansion, making it cycle in the set expansion force range, prolonging the cycle life of the battery pack. Preferably, the buffer layer is subjected to compression treatment to increase its compressed pressure, provide shear force between the cells, and fix the relative positions of the various parts of the energy storage module; the flame retardant Layers include: mica, ceramic or silicone rubber. The flame retardant layer can ensure the safety of the energy storage module under the condition of thermal runaway when the energy storage module has a tight structural design.

In this application, the bottom of the energy storage module has a recessed structure. In specific applications, the recessed structure at the bottom is placed on the frame beam of the energy storage system to improve the utilization rate of the overall structure.

In the present application, a bus bar is also installed on the guide tray, wherein the energy storage modules can be connected through the bus bar to assemble an energy storage system of at least one layer, at least one row, and at least one column, so as to Adapt to different application scenarios.

Description of drawings

Other characteristics, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Figure 1: Diagram 1 of the external structure of an energy storage module according to an embodiment of the present application;

Figure 2: Diagram 2 of the internal structure of the energy storage module in an embodiment of the present application;

Figure 3: A schematic diagram of the connection position of the battery cell and the pole piece in an embodiment of the present application;

Figure 4: Schematic diagram of the structure of the pole piece in an embodiment of the present application;

Figure 5: Schematic diagram of the structure of the guiding tray in an embodiment of the present application;

Figure 6: Diagram 2 of the external structure of the energy storage module according to an embodiment of the present application;

Figure 7: Diagram 2 of the internal structure of the energy storage module in an embodiment of the present application;

Figure 8: Schematic diagram of the back structure of an energy storage module according to an embodiment of the present application;

Figure 9: Schematic diagram of the structure of an energy storage system according to an embodiment of the present application;

Figure 10: A schematic structural diagram of an energy storage system according to another embodiment of the present application;

Figure 11: Schematic diagram of the structure of an energy storage system according to another embodiment of the present application;

Figure 12: Schematic diagram of an application scenario of an energy storage system according to an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

As shown in Figures 1 to 8, in one embodiment of the present application, an energy storage module includes: an end plate 2, an insulating plate 6, and a battery pack,

The end plates 2 are arranged at both ends of the energy storage module, and the insulating plates 6 are arranged inside the end plates 2, and at least one set of series-parallel The set of battery cores, the insulating plate 6 can also be replaced by an insulating material layer coated or injection molded on the inner side of the end plate 2;

Wherein, the battery pack includes: a battery cell 7, a buffer layer 8, a battery cell 7 and a flame-retardant layer 9,

The buffer layer 8 is provided between the adjacent battery cells 7 , and the flame retardant layer 9 is also provided on the other side of the battery cells 7 .

The energy storage module in this embodiment includes an end plate 2, an insulating plate 6, and a battery cell 7. This structure can be expanded for products of different sizes, reducing development costs; and it can also improve the grouping efficiency of the energy storage module and reduce zero Reduce parts count and reduce costs while balancing reliability and safety. Wherein, the insulating plate 6 is made of insulating material, wherein the insulating material includes but not limited to FR4.

Specifically, as shown in FIG. 2, in this embodiment, the structure of the energy storage module is composed of an end plate 2 and an insulating plate 6 at both ends, and the rest is an electric core 7, a buffer layer 8, an electric The sequence of the cores 7 and the flame-retardant layer 9 can be adjusted according to the requirement, and the arrangement is not limited to the series-parallel connection of various numbers of battery cells 7 .

Further, the size of the end plate 2 is determined according to the size and quantity of the battery cells 7 to ensure that the end plate 2 provides sufficient support during the cycle of the battery cells 7 to stabilize the energy storage module structure.

Among them, in this embodiment, the end plate 2 is preferably made of carbon steel with a higher melting point, and the processing method is switched to sheet metal, which does not require high mold costs, and can be adjusted according to the design requirements of the energy storage module. size. However, the existing end plate 2 is usually made of aluminum alloy material, which has a low melting point, complicated processing, and high cost of the mold, so the size cannot be adjusted.

Further, reinforcing ribs may also be welded on the surface of the end plate 2 to ensure that the strength of the end plate 2 meets the usage requirements.

Further, this embodiment further includes: a guide tray 4 for guiding, positioning and insulating functions, through which the battery pack is installed between the insulating plates 6 . Wherein, the guide tray 4 is used to ensure the fixation of the position of the battery pack, and also to ensure the connection between the cross-pole pieces 5 and the tabs on the guide tray 4 .

Wherein, as shown in FIG. 4 , in this embodiment, the guide tray 4 is further provided with a cross-pole piece 5 , which is connected to the tab on the battery cell 7 through the cross-pole piece 5 . Among them, the connection points 10 of the tabs and the pole piece 5 can adopt multiple connection methods, such as laser welding, ultrasonic welding, etc.; Placed on the same side, the efficiency is higher in the automated assembly process.

Optionally, in this embodiment, the transpolar piece 5 can be made of an aluminum profile to ensure product reliability under the conditions of parallel connection of the cells 7 and high magnification.

The guide tray 4 is a plastic part. Further, the guide tray 4 includes but not limited to polyphenylene oxide (PPO).

Wherein, further, the outlet seat is also integrated on the guide tray 4, and this embodiment also includes a bus bar 16, the bus bar 16 is connected to the outlet seat of the guide tray 4, and the bus bar 16 is used to connect the mold Electrical interface between group and module or module and system. A bus bar 16 is also installed on the guide tray 4 , as shown in FIG. 7 . Wherein, an embedded nut 13 may be used to provide a connection and fixing point between the cross-pole piece 5 and the bus bar 16 . Wherein, the energy storage modules described below can be connected through the bus bars 16 to assemble an energy storage system 18 of at least one layer, at least one row and at least one column, so as to adapt to different application scenarios.

Furthermore, an insulating layer is added on the surface of the bus bar 16 , wherein the insulating layer can be realized in various ways such as dipping, spraying, and covering with heat-shrinkable tubes.

In this embodiment, the straddle piece 5 is arranged asymmetrically, and the above-mentioned asymmetric arrangement guides the heat generated by the straddle piece 5 to the side of the radiator 3 .

In this embodiment, the guide tray 4 is further provided with guide grooves 11 for guiding the tabs. During the assembly process, the guide groove 11 guides the tabs of the battery cells 7 to ensure their fixed position after installation and provide insulation between the battery cells 7 at the same time. Among them, the acquisition component arrangement slot is reserved for the acquisition component of the 12-bit cell 7, and the acquisition can use wire harness, PCB, FPC or FFC according to the demand.

In this embodiment, the insulating plate 6 includes but is not limited to: FR4. The thickness of the insulating plate 6 should ensure that there is a sufficient electrical gap between the end plate 2 and the battery pack, and it still has reliable performance under high-voltage conditions. sex.

Further, the cushioning layer 8 is made of a flame-retardant cushioning material, wherein the cushioning material includes but not limited to flame-retardant PU foam; the cushioning layer 8 provides a The shear force between them ensures the fixation of the relative position; the expansion of the battery pack is absorbed during the cycle of the battery pack, so that it circulates in the set expansion force range and prolongs the cycle life of the battery pack. Wherein preferably, the buffer layer 8 is subjected to compression treatment to increase its compressed pressure, provide shear force between the cells 7, and fix the relative positions of the various parts of the energy storage module.

Optionally, in this embodiment, the flame retardant layer 9 is made of a flame retardant material, wherein the flame retardant material includes but not limited to mica, ceramics or silicone rubber. The flame retardant layer 9 can ensure the safety of the energy storage module under the condition of thermal runaway when the energy storage module has a tight structural design.

This embodiment also includes: a radiator 3, the radiator 3 is detachably installed under the end plate 2, and there is a heat-conducting material between the radiator 3 and the battery pack, and the heat-conducting material Materials include but are not limited to thermally conductive glue and the like. Wherein, in this embodiment, the contact surface between the heat sink 3 and the cell pack has heat-conducting materials. Through the above arrangement, the bottom plate is omitted, the weight is reduced and heat dissipation is enhanced. Further, the heat sink 3 can be used according to the working process Air-cooled or liquid-cooled, the choice is more flexible.

Further, this embodiment further includes: a cover plate 1 , the cover plate 1 is detachably installed above the end plate 2 . Wherein, the cover plate 1 is preferably processed by sheet metal to ensure certain support and installation strength. Preferably, the cover plate 1 can be replaced with a radiator 3 to further enhance the heat dissipation function.

The cover plate 1 has a concave-shaped structure, wherein the concave-shaped structure provides an additional cooling air channel for the energy storage module to enhance heat dissipation.

Further, in this embodiment, the bottom of the energy storage module has a concave structure. In specific applications, the concave structure at the bottom is placed on the frame beam of the energy storage system 18 to improve the utilization rate of the overall structure.

Further, as shown in FIG. 6 , this embodiment also includes a casing 14 and a panel 15, the casing 14 and the panel 15 are installed on the outside of the energy storage module, and vents are provided on the casing 14 17. At least one electrical interface is reserved on the panel 15. Wherein, the shell 14 is preferably processed by sheet metal, and the expansion structure for different numbers of modules can meet the requirements. There is also a fan on the panel 15, and centrifugal fans, axial fans, etc. can be used according to the heat dissipation; various electrical interfaces are reserved on the panel 15 to provide connections between energy storage modules when the modules cannot meet the internal expansion design. .

Further, vents 17 are provided on the back of the energy storage module shell 14, as shown in FIG. Air-cooled mode; if switched to liquid-cooled mode, the vents 17 can be changed to coolant inlets and outlets.

As shown in Figures 9 to 12, another aspect of the present application also proposes an energy storage system 18, including the energy storage module, characterized in that the energy storage module is based on at least one layer, at least one row, and at least Combined installation in a row. Wherein, the technical solution of the energy storage module involved is described above, and will not be repeated here.

As shown in Figure 9, the energy storage system 18 is provided with two layers, one row and one column of the energy storage modules; The energy storage system 18 installed in combination; FIG. 11 schematically shows the energy storage system 18 installed in combination with thirteen layers, one row and two columns of the energy storage modules. Wherein, the above schematic manners are only for illustration, and do not limit the protection scope of the present application, and those skilled in the art will have motivation to make other alternative manners.

Among them, as shown in Figure 12, the energy storage system 18 assembled by using the energy storage module in this embodiment adopts a symmetrical arrangement in the container 19, and the container 19 adopts the design of opening the door on the outside; It is necessary to adjust the number of battery cells inside the module or the grouping method of the energy storage module, and adjust the length of the module.

The energy storage module of this application includes an end plate 2, an insulating plate 6, and 7 layers of electric cores. This structure can be expanded for products of different sizes to reduce development costs; Reduce parts count and reduce costs while balancing reliability and safety. In this application, the insulating plate 6 includes but is not limited to: FR4, the thickness of the insulating plate 6 should ensure sufficient electrical gap between the end plate 2 and the battery pack, and still have reliability under high-voltage conditions The buffer layer 8 includes: flame-retardant PU foam; the buffer layer 8 provides shear force between the battery packs during assembly to ensure the relative position is fixed; during the cycle of the battery pack Absorb the expansion of the battery pack, make it cycle in the set expansion force range, and prolong the cycle life of the battery pack. Preferably, the buffer layer 8 is subjected to compression treatment to increase its compressed pressure, and provide shear force between the cells 7 to fix the relative positions of the various parts of the energy storage module; The flame retardant layer 9 includes: mica, ceramics or silicon rubber. The flame retardant layer 9 can ensure the safety of the energy storage module under the condition of thermal runaway when the energy storage module has a compact structural design. In this application, the bottom of the energy storage module has a recessed structure. In specific applications, the recessed structure at the bottom is placed on the frame beam of the energy storage system 18 to improve the utilization rate of the overall structure. In this application, busbars 16 are also installed on the guide tray 4, wherein the energy storage modules can be connected through the busbars 16 to assemble at least one layer, at least one row and at least one row of energy storage modules. System 18 to adapt to different application scenarios.

In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation. , rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the application. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

The above embodiments are only used to illustrate the technical solution of the present application rather than limit it, and the present application is described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application, and all should be covered within the scope of the claims of the present application.

Claims

An energy storage module, characterized in that it includes: an end plate, an insulating plate, and a battery pack,

The end plates are arranged at both ends of the energy storage module, the insulating plates are arranged inside the end plates, and at least one set of battery cells arranged in series and parallel is arranged between the insulating plates Group,

The insulating plate can also be replaced by a layer of insulating material coated or injection molded on the inner side of the end plate;

Wherein, the battery cell group includes: a battery cell, a buffer layer, a battery cell and a flame retardant layer,

The buffer layer is disposed adjacently between the electric cores, and the flame retardant layer is further disposed on the other side of the electric cores.
The energy storage module according to claim 1, further comprising: a guide tray for guiding, positioning and insulation, and the battery pack is installed on the insulating plate through the guide tray between.
The energy storage module according to claim 2, wherein the guide tray is a plastic part.
The energy storage module according to claim 3, wherein the guide tray is further provided with a cross-pole piece, which is connected to the tab on the battery cell through the cross-pole piece.
The energy storage module according to claim 4, wherein guide grooves for guiding the tabs are further provided on the guide tray.
The energy storage module according to claim 4, wherein the cross-pole piece is made of aluminum profile.
The energy storage module according to claim 2 or 3 or 4 or 5 or 6, wherein the guide tray is also provided with a side-mounted integrated outlet seat.
The energy storage module according to claim 2 or 3 or 4 or 5 or 6, further comprising: a bus bar, the bus bar is connected to the outlet seat on the guide tray.
The energy storage module according to any one of claims 1 to 6, further comprising: a radiator, the radiator is detachably installed under the end plate, between the radiator and the There is also a heat-conducting material between the battery packs.
The energy storage module according to any one of claims 1 to 6, further comprising: a cover plate, the cover plate is detachably installed above the end plate.
The energy storage module according to claim 10, wherein the cover plate has a concave-shaped structure.
The energy storage module according to any one of claims 1 to 6, wherein the bottom of the energy storage module has a concave structure.
The energy storage module according to any one of claims 1 to 6, characterized in that,

The insulating plate is made of insulating material;

And/or, the buffer layer is made of a flame-retardant buffer material;

And/or, the flame retardant layer is made of flame retardant material.
The energy storage module according to any one of claims 1 to 6, further comprising a casing and a panel, the casing and the panel are installed on the outside of the energy storage module, and on the casing Air vents are provided, and at least one electrical interface is reserved on the panel.
The energy storage system is characterized in that it comprises the energy storage module according to any one of claims 1 to 14, wherein the energy storage modules are combined in at least one layer, at least one row and at least one column Install.