Energy storage battery system

Abstract

The application relates to the technical field of energy storage batteries, in particular to an energy storage battery system, which comprises a plurality of cell assemblies and end plates; wherein the number of the cell assemblies is multiple, the cell assemblies are sequentially arranged along a first preset direction, and each cell assembly comprises a plurality of cells sequentially arranged along a second preset direction; at least one end of all the cell assemblies on the same side shares an end plate along the second preset direction. It can be seen that, in the energy storage battery system provided by the application, two cell assemblies share an end plate to form a battery module, instead of assembling two battery modules independently, so that the assembly steps and the investment in parts are saved, and the cost is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage battery technology, and in particular to an energy storage battery system. Background Technology

[0002] Currently, residential energy storage equipment includes key components such as a housing, multiple battery modules, an energy storage inverter, and a control system. The energy storage capacity ranges from 5 to 10 kWh, and it can be integrated with a residential photovoltaic system to meet the daily electricity needs of a household. Each battery module includes cells, foam, and end plates. These components are assembled together and ultimately secured with straps to form a single unit. Multiple battery modules are arranged sequentially within the housing to meet usage requirements. However, because each battery module needs to be assembled independently, the process is repetitive and involves numerous steps, resulting in low assembly efficiency. Utility Model Content

[0003] The purpose of this application is to provide an energy storage battery system that, to a certain extent, solves the technical problem in the prior art that each battery module in a household energy storage device needs to be assembled independently, with repetitive and numerous steps, resulting in low assembly efficiency.

[0004] This application provides an energy storage battery system, including: a cell assembly and an end plate; wherein, there are multiple cell assemblies arranged sequentially along a first preset direction, and each cell assembly includes multiple cells arranged sequentially along a second preset direction; along the second preset direction, at least one end of all the cell assemblies located on the same side shares one end plate.

[0005] In the above technical solution, the energy storage battery system further includes a tab bracket, a busbar, and a sampling component; wherein, the tab bracket is installed on the top of the cell assembly, the sampling component and the busbar are both installed on the top of the tab bracket, and two adjacent cells are electrically connected through the corresponding busbar; a support protrusion is formed on the top of the end plate along its height direction, and one end of the sampling component extends to the top of the support protrusion and is connected to the support protrusion.

[0006] In any of the above technical solutions, the supporting protrusion further includes a U-shaped supporting body and a flanged portion; wherein, the opposite two side openings of the U-shaped supporting body are respectively arranged upward and downward along the height direction of the end plate; the third opening of the U-shaped supporting body is arranged along the second preset direction and towards the side away from the cell assembly.

[0007] Along the first preset direction, the flanges are provided on opposite sides of the U-shaped support body, and the flanges on both sides extend in opposite directions, and the sampling member is located on the U-shaped support body and the flanges.

[0008] In any of the above technical solutions, the sampling component and the supporting protrusion are further positioned by welding, and the sampling component and the supporting protrusion are connected by bolts.

[0009] In any of the above technical solutions, the sampling member extends along the second preset direction from one end of the battery cell assembly to the opposite end of the battery cell assembly.

[0010] In any of the above technical solutions, further, two columns of the busbars are arranged on opposite sides of the top of any of the battery cell assemblies along its height direction, and the sampling member is disposed between the two columns of busbars on opposite sides of the top of the battery cell assemblies and is electrically connected to each column of busbars for collecting data of the battery cell.

[0011] In any of the above technical solutions, further, along the length direction of the end plate, arc-shaped mating surfaces are formed on opposite sides of the end plate.

[0012] In any of the above technical solutions, the energy storage battery system further includes a strap, and the cell assembly and the end plate are tied together by the strap, and the strap is disposed against the arc-shaped mating surface.

[0013] In any of the above technical solutions, the end plate is further provided with a first limiting portion and a second limiting portion arranged sequentially at intervals along its height direction, and at least the second limiting portion is located on the arc-shaped mating surface, and the strap is limited between the first limiting portion and the second limiting portion.

[0014] In any of the above technical solutions, the end plate further includes a main board body and a reinforcing rib and a column connected to the main board body; wherein, the main board body is disposed at the end of the battery cell assembly; the reinforcing rib and the column are both disposed on the side of the main board body opposite to the battery cell assembly; the column extends from the top of the main board body to the bottom of the main board body, and the column forms a mounting through hole that extends along its height direction;

[0015] The energy storage battery system also includes a housing and fastening components. The battery cell assembly and the end plate assembly are disposed in the housing, and the fastening components are installed in the mounting through holes to lock the battery cell assembly and the end plate assembly onto the housing.

[0016] In any of the above technical solutions, when the strap is a steel strip, an insulating layer is formed on the side of the strap near the battery cell assembly.

[0017] In any of the above technical solutions, the top of the end plate is further provided with a support plate portion extending along the second preset direction; the energy storage battery system further includes a total positive output component and a total negative output component, and the total positive output component and the total negative output component are both located on the support plate portion and are respectively connected to the support plate portion.

[0018] In any of the above technical solutions, a first insulating plate is further provided between any two adjacent battery cell assemblies along the first preset direction.

[0019] In any of the above technical solutions, a second insulating plate is further provided between the battery cell assembly and the end plate along the second preset direction.

[0020] In any of the above technical solutions, a lifting part is further formed at the top of the end plate along its height direction, and the lifting part is formed with a lifting hole.

[0021] Compared with the prior art, the beneficial effects of this application are as follows:

[0022] In the energy storage battery system provided in this application, two battery cell components share a single end plate to form a battery module, instead of assembling two battery modules independently. This saves assembly steps and the investment in components, thereby greatly reducing costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 An assembly diagram of the battery cell assembly and end plate provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 A magnified structural diagram at point A;

[0026] Figure 3 This is a schematic diagram of the end plate provided in an embodiment of this application;

[0027] Figure 4 This is another structural schematic diagram of the end plate provided in an embodiment of this application;

[0028] Figure 5 Assembly drawings of the battery cell assembly, end plate, and insulating plate provided in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of the internal structure of the energy storage battery system provided in the embodiments of this application;

[0030] Figure 7 This is a schematic diagram of the structure of the energy storage battery system provided in the embodiments of this application.

[0031] Figure label:

[0032] 1-Cell assembly, 101-First end, 102-Second end, 2-End plate, 21-Main body, 22-Reinforcing rib, 23-Column, 24-Supporting protrusion, 241-U-shaped support body, 242-Flanged edge, 25-Arc mating surface, 26-First limiting part, 27-Second limiting part, 28-Supporting plate part, 29-Lifting part, 291-Lifting hole, 3-Electrode bracket, 4-Busbar, 5-Sampling component, 6-Binding strap, 7-Box, 8-First fastening component, 9-Total positive output assembly, 10-Total negative output assembly, 11-Insulating plate, 12-Second fastening component, 13-Third fastening component, a-First preset direction, b-Second preset direction. Detailed Implementation

[0033] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0034] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0035] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] The following reference Figures 1 to 7 This application describes an energy storage battery system according to some embodiments.

[0039] See Figure 1 and Figure 2 As shown, an embodiment of this application provides an energy storage battery system, including: a cell assembly 1 and an end plate 2; wherein, there are multiple cell assemblies 1, which are arranged sequentially along a first preset direction a, and each cell assembly 1 includes multiple cells arranged sequentially along a second preset direction b; along the second preset direction b, at least one end of all cell assemblies 1 located on the same side shares an end plate 2.

[0040] As can be seen from the structure described above, in the energy storage battery system provided in this application, two battery cell components 1 share a single end plate 2 to form a battery module, instead of assembling two battery modules independently, thereby saving assembly steps and the investment in components, and greatly reducing costs.

[0041] Furthermore, preferably, along the second preset direction b, each cell assembly 1 includes a first end 101 and a second end 102, wherein all the first ends 101 of all the cell assemblies 1 share a single end plate 2, and all the second ends 102 of all the cell assemblies 1 share a single end plate 2, that is, there are a total of two end plates 2. Of course, it is not limited to this, and the end plate 2 may only be designed at one end of the cell assembly 1, that is, in this case there is only one end plate 2.

[0042] Furthermore, preferably, the second preset direction b is set perpendicular to the first preset direction a, but of course, it is not limited to this.

[0043] Furthermore, preferably, foam is provided between two adjacent cells in each cell assembly 1. The foam can effectively absorb the thickness tolerance of the cell in its initial state and provide expansion space for the cell during its life cycle. In addition, the foam is compressed during assembly, and the rebound force provided by the foam can provide pre-tightening force for the module, improve the cycle life of the cell, and extend the service life of the product.

[0044] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the energy storage battery system also includes a tab support 3, a busbar 4, and a sampling component 5; wherein, the tab support 3 is installed on the top of the cell assembly 1, the sampling component 5 and the busbar 4 are both installed on the top of the tab support 3, and two adjacent cells are electrically connected through the corresponding busbar 4; a support protrusion 24 is formed on the top of the end plate 2 along its height direction, and one end of the sampling component 5 extends to the top of the support protrusion 24 and is connected to the support protrusion 24.

[0045] As can be seen from the structure described above, since multiple battery cell components 1 share a single end plate 2 in this application, it is not convenient to set tabs on the left and right sides like independent battery modules. Instead, tab supports 3 are set on the left and right sides of the battery module, and the tabs are designed on the top of the battery cell. Correspondingly, the tab supports 3, busbars 4, and sampling components 5 are set on the top of the battery cell component 1. This avoids interference, and the sampling components 5 on the top can be supported by the support protrusion 24 on the top of the end plate 2. The spatial layout is more reasonable, and there is no interference between the structural components.

[0046] In this embodiment, preferably, as follows: Figure 3 and Figure 4 As shown, the support protrusion 24 includes a U-shaped support body 241 and a flange 242; wherein, the openings on opposite sides of the U-shaped support body 241 are respectively arranged upward and downward along the height direction of the end plate 2; the third opening of the U-shaped support body 241 is arranged along the second preset direction b and towards the side away from the cell assembly 1.

[0047] Along the first preset direction a, the U-shaped support body 241 has flanges extending in opposite directions on both sides, and the sampling member 5 is located on the U-shaped support body 241 and the flange portion 242.

[0048] As described above, the main body of the supporting protrusion 24, namely the U-shaped supporting body 241, adopts a U-shaped frame structure. This structure meets strength requirements while contributing to lightweight design. Furthermore, flanges 242 are provided on both sides of the U-shaped supporting body 241, providing sufficient support area for the ends of the sampling component 5, thus improving the support effect. Of course, the structure of the supporting protrusion 24 is not limited to the above; it can also be other frame structures or block structures, etc.

[0049] Furthermore, preferably, the sampling component 5 is a flexible circuit board, but of course, it is not limited to this.

[0050] Further, preferably, such as Figure 5 As shown, the top of the sampling component 5 and the busbar 4 described below are also provided with an insulating plate 11, which serves as an insulating and protective element.

[0051] In this embodiment, preferably, as follows: Figure 2 As shown, the sampling component 5 and the support protrusion 24 are positioned by welding, and then connected by fastening components, namely the first fastening component 8, such as bolts, to ensure assembly accuracy. Moreover, since the sampling component 5 and the support protrusion 24 are positioned by welding with a small area, rather than by welding with a large area, damage to the circuit of the sampling component 5 is avoided.

[0052] In this embodiment, preferably, as follows: Figure 1 As shown, the sampling member 5 extends along the second preset direction b from one end of the cell assembly 1 to the opposite end of the cell assembly 1.

[0053] As can be seen from the structure described above, a single sampling component 5 can be used to detect all the cells within the cell assembly 1, thus meeting the usage requirements. Of course, there can also be multiple sampling components 5, which can be sequentially arranged along the length direction of the cell assembly 1, i.e., the second preset direction b, to replace the single long sampling component 5 in this application, depending on the actual needs.

[0054] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, two busbars 4 are arranged on opposite sides of the top of any cell assembly 1 along its height direction, and a sampling member 5 is disposed between the two busbars 4 on opposite sides of the top of the cell assembly 1 and is electrically connected to each busbar 4 for collecting data from the cell.

[0055] As can be seen from the structure described above, arranging the sampling component 5 between the two busbars 4 makes it easier for the sampling component 5 to sample different output electrodes of the cells on both sides at the same time. The layout is more reasonable and occupies less space.

[0056] In this embodiment, preferably, as follows: Figure 3 As shown, along the length of the end plate 2, arc-shaped mating surfaces 25 are formed on both opposite sides of the end plate 2.

[0057] As can be seen from the structure described above, the side of the end plate 2 is designed with an arc-shaped mating surface 25, which increases the structural strength of the end plate 2, reduces the deformation of the final module, and avoids squeezing the space of the front electrical compartment, thus avoiding safety risks.

[0058] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the energy storage battery system also includes a strap 6, and the cell assembly 1 and the end plate 2 are tied together by the strap 6. The strap 6 is set against the arc-shaped mating surface 25, making the cell assembly 1 and the end plate 2 more stable and secure after assembly.

[0059] Furthermore, preferably, the aforementioned binding straps 6 can be two, one of which is located on the upper part of the cell assembly 1 and the end plate 2, and the other is located on the lower part of the cell assembly 1 and the end plate 2, thereby fixing both the upper and lower parts of the cell assembly 1 and the end plate 2, resulting in a better fixing effect. Of course, the number of binding straps 6 is not limited to two; it can also be one or more, such as three or four, etc., depending on the actual needs.

[0060] Furthermore, preferably, the upper strap 6 can be a steel strap, and the lower strap 6 can be a plastic cable tie. Of course, it is not limited to this; it can also be entirely made of steel straps or entirely made of plastic cable ties, depending on the actual needs.

[0061] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the end plate 2 has a first limiting part 26 and a second limiting part 27 arranged sequentially at intervals along its height direction, and at least the second limiting part 27 is located on the arc-shaped mating surface 25. The strap 6 is limited between the first limiting part 26 and the second limiting part 27. Preferably, both the aforementioned steel strap and plastic cable tie are equipped with the first limiting part 26 and the second limiting part 27.

[0062] As can be seen from the structure described above, the strap 6 is restricted between the first limiting part 26 and the second limiting part 27, and will not shift, making it safer and more reliable.

[0063] In this embodiment, preferably, an insulating layer is formed on the side of the aforementioned steel strip closest to the battery cell assembly 1, providing insulation and protection, making it safer and more reliable. It should be noted that plastic cable ties do not require an insulating layer because they inherently possess insulating properties.

[0064] In this embodiment, preferably, as follows: Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the end plate 2 includes a main body 21 and a reinforcing rib 22 and a column 23 connected to the main body 21; wherein, the main body 21 is disposed at the end of the cell assembly 1; the reinforcing rib 22 and the column 23 are both disposed on the side of the main body 21 away from the cell assembly 1; the column 23 extends from the top of the main body 21 to the bottom of the main body 21, and the column 23 forms a mounting through hole that extends through its height direction;

[0065] The energy storage battery system also includes a housing 7 and a fastening component, namely a second fastening component 12, such as screws or bolts. The assembly of the cell assembly 1 and the end plate 2 is disposed inside the housing 7, and the fastening component is installed in the mounting through hole for locking the assembly of the cell assembly 1 and the end plate 2 onto the housing 7.

[0066] As can be seen from the structure described above, the main body 21 serves as the main support area, the reinforcing rib 22 increases the strength, and the column 23 serves to install fastening components such as screws or bolts. The entire end plate 2 is designed more rationally.

[0067] Furthermore, preferably, the reinforcing rib 22 can be a grid-type stiffening plate. Of course, it is not limited to this, and can be selected according to actual needs.

[0068] In this embodiment, preferably, as follows: Figure 2 As shown, the top of the end plate 2 has a support plate portion 28 extending along the second preset direction b; the energy storage battery system also includes a total positive output component 9 and a total negative output component 10, and both the total positive output component 9 and the total negative output component 10 are located on the support plate portion 28, and the total positive output component 9 and the total negative output component 10 are respectively connected to the support plate portion 28.

[0069] As can be seen from the structure described above, the top of the end plate 2 is designed as a flat plate structure, which has sufficient support area, thereby supporting the total positive output component 9 and the total negative output component 10, making full use of the space in the height direction, and achieving higher integration.

[0070] Furthermore, preferably, the aforementioned main body 21, reinforcing rib 22, column 23, U-shaped support body 241 and flange 242 are an integral structure. Of course, it is not limited to this and can be selected according to actual needs.

[0071] Furthermore, preferably, the total positive output component 9 and the total negative output component 10 are respectively connected to the support plate portion 28 by fastening members, namely the third fastening member 13, such as screws or bolts, to facilitate installation and disassembly.

[0072] In this embodiment, preferably, a first insulating plate (not shown in the figure) is provided between any two adjacent battery cell assemblies 1 along the first preset direction a.

[0073] As can be seen from the structure described above, setting a first insulating plate between the two battery cell assemblies 1 can effectively ensure the electrical safety between the two rows of battery cells, prevent electrical safety risks caused by the failure of the blue film on the surface of the battery cells, and make it safer and more reliable.

[0074] Furthermore, preferably, the first insulating plate is glued to the adjacent cell assembly 1.

[0075] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, along the second preset direction b, a second insulating plate (not shown in the figure) is provided between the battery cell assembly 1 and the end plate 2, which can effectively ensure the electrical safety between the battery cell assembly and the end plate 2. The end plate 2 is placed on the outermost side of the module. The end plate 2 is mostly made of metal and is formed by die casting.

[0076] Furthermore, preferably, the second insulating board is an insulating sheet made of PC material, but of course, it is not limited to this.

[0077] Furthermore, preferably, the second insulating plate is glued to the adjacent cell assembly 1 end plate 2.

[0078] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, a lifting part 29 is formed on the top of the end plate 2 along its height direction, and the lifting part 29 is formed with a lifting hole 291. Without occupying extra space, it can be transported and lifted into the casing using tooling, thereby realizing the installation of the entire battery system.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage battery system, characterized in that, include: The battery cell assembly and the end plate; wherein the number of the battery cell assemblies is multiple and arranged sequentially along a first preset direction, and each battery cell assembly includes multiple battery cells arranged sequentially along a second preset direction; along the second preset direction, at least one end of all the battery cell assemblies located on the same side shares one end plate.

2. The energy storage battery system according to claim 1, characterized in that, The energy storage battery system further includes a tab support, a busbar, and a sampling component; wherein, the tab support is mounted on the top of the cell assembly, the sampling component and the busbar are both mounted on the top of the tab support, and two adjacent cells are electrically connected through the corresponding busbar; a support protrusion is formed on the top of the end plate along its height direction, and one end of the sampling component extends to the top of the support protrusion and is connected to the support protrusion.

3. The energy storage battery system according to claim 2, characterized in that, The supporting protrusion includes a U-shaped supporting body and a flanged portion; wherein, the two opposite openings of the U-shaped supporting body are respectively arranged upward and downward along the height direction of the end plate; the third opening of the U-shaped supporting body is arranged along the second preset direction and facing away from the cell assembly. Along the first preset direction, the flanges are provided on opposite sides of the U-shaped support body, and the flanges on both sides extend in opposite directions, and the sampling member is located on the U-shaped support body and the flanges.

4. The energy storage battery system according to claim 2, characterized in that, The sampling component is positioned by welding to the supporting protrusion, and the sampling component is connected to the supporting protrusion by bolts; and / or The sampling member extends along the second preset direction from one end of the battery cell assembly to the opposite end of the battery cell assembly; and / or Two columns of busbars are arranged on opposite sides of the top of any of the battery cell assemblies along its height direction, and the sampling member is disposed between the two columns of busbars on opposite sides of the top of the battery cell assembly and is electrically connected to each column of busbars for collecting data from the battery cell.

5. The energy storage battery system according to claim 1, characterized in that, Along the length of the end plate, arc-shaped mating surfaces are formed on opposite sides of the end plate.

6. The energy storage battery system according to claim 5, characterized in that, The energy storage battery system also includes straps, and the cell assembly and the end plate are tied together by the straps, with the straps abutting against the arc-shaped mating surface.

7. The energy storage battery system according to claim 6, characterized in that, The end plate has a first limiting portion and a second limiting portion arranged sequentially at intervals along its height direction, and at least the second limiting portion is located on the arc-shaped mating surface, and the strap is limited between the first limiting portion and the second limiting portion.

8. The energy storage battery system according to claim 6, characterized in that, The end plate includes a main body and reinforcing ribs and columns connected to the main body; wherein, the main body is disposed at the end of the cell assembly; the reinforcing ribs and columns are both disposed on the side of the main body opposite to the cell assembly; the columns extend from the top of the main body to the bottom of the main body, and the columns are formed with mounting through holes extending along their height direction; The energy storage battery system further includes a housing and fastening components. The battery cell assembly and the end plate assembly are disposed within the housing, and the fastening components are installed within the mounting through holes to lock the battery cell assembly and the end plate assembly onto the housing; and / or When the strap is a steel strip, an insulating layer is formed on the side of the strap closest to the cell assembly.

9. The energy storage battery system according to claim 1, characterized in that, The top of the end plate has a supporting plate portion extending along the second preset direction; the energy storage battery system also includes a total positive output component and a total negative output component, and the total positive output component and the total negative output component are both located on the supporting plate portion and are respectively connected to the supporting plate portion.

10. The energy storage battery system according to any one of claims 1 to 9, characterized in that, Along the first preset direction, a first insulating plate is disposed between any two adjacent battery cell assemblies; and / or Along the second preset direction, a second insulating plate is disposed between the cell assembly and the end plate; and / or The end plate has a lifting section formed at its top along its height direction, and the lifting section has a lifting hole.

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