Battery module and energy storage battery module

Abstract

The application relates to the technical field of batteries, in particular to a battery module and an energy storage battery module. The battery module comprises a plurality of battery cell assemblies, two end plates and two side plates. The plurality of battery cell assemblies are sequentially arranged along a first preset direction, and each battery cell assembly comprises a plurality of battery cells sequentially arranged along a second preset direction. The plurality of battery cell assemblies are collectively connected to the two end plates along the second preset direction, and the two end plates are arranged at opposite ends of the plurality of battery cell assemblies. Along the first preset direction, the two side plates are arranged at opposite sides of an assembly of the plurality of battery cell assemblies and the two end plates, and the two side plates are connected to the two end plates. As can be seen, the plurality of rows of battery cells are collectively connected to the two end plates and the two side plates to form a group, and the battery cells do not need to be separately grouped and then assembled, so that the operation steps are simplified, the production efficiency is improved, the investment in parts is saved, and the production cost is reduced.

Description

Technical Field

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

[0002] A battery module is a modular assembly composed of multiple battery cells connected in series or parallel, along with integrated circuits and control units. It is primarily used to improve cell density and reliability, and to simplify battery pack assembly and management. Currently, most battery modules are single-row cells with cast aluminum end plates and strapping. Typical energy storage battery modules often require multiple modules to be assembled together, which not only occupies more space but also requires multiple end plates and steel straps, resulting in higher costs. Utility Model Content

[0003] The purpose of this application is to provide a battery module and energy storage battery module, which to a certain extent solves the technical problems existing in the prior art. Currently, most battery modules are single-module forms with single-row cells and cast aluminum end plates plus straps. General energy storage battery modules often require multiple battery modules to be assembled together, which not only occupies a lot of space, but also requires multiple end plates and steel strips, resulting in high costs.

[0004] This application provides a battery module, including: multiple cell assemblies, two end plates and two side plates; wherein, the multiple cell assemblies are arranged sequentially along a first preset direction, and each cell assembly includes multiple cells arranged sequentially along a second preset direction;

[0005] The multiple battery cell assemblies share two end plates, and along the second preset direction, the two end plates are respectively disposed at opposite ends of the multiple battery cell assemblies; along the first preset direction, two side plates are disposed on opposite sides of the assembly of the multiple battery cell assemblies and the two end plates, and the two side plates are connected to the two end plates.

[0006] In the above technical solution, a first flange extending toward the side away from the battery cell is further formed on one side of the end plate, and the first flange abuts against one of the side plates and is connected by a first fastening member.

[0007] In any of the above technical solutions, the other side of the end plate is further provided with a second flange extending toward the side opposite to the battery cell, and the second flange abuts against the other side plate and is connected by a second fastening member.

[0008] In any of the above technical solutions, the end plate further comprises a third flange and a fourth flange extending toward the side opposite to the battery cell on the front side away from the battery cell, and the third flange and the fourth flange are arranged sequentially from bottom to top along the height direction of the end plate; the third flange can be connected to the first target object by a third fastening member, and the fourth flange can be connected to the second target object by a fourth fastening member.

[0009] In any of the above technical solutions, the battery module further includes a total positive output component and a total negative output component; wherein, along the first preset direction, the total positive output component and the total negative output component are both disposed on the same side of the first battery cell assembly or the last battery cell assembly, and the total positive output component and the total negative output component extend along the first preset direction.

[0010] In any of the above technical solutions, the battery module further includes two insulating seats, and a support plate is formed on the side plate located on the same side as the total positive output component and the total negative output component. The support plate extends toward the side away from the cell assembly, and both insulating seats are disposed on the support plate. The total positive output component is locked to one of the insulating seats by a fifth fastening member, and the total negative output component is locked to the other insulating seat by a sixth fastening member.

[0011] In any of the above technical solutions, further, along the second preset direction, the total positive output component and the total negative output component are arranged sequentially at intervals, and the total positive output component and the total negative output component are located in the region between the two ends of the cell assembly.

[0012] In any of the above technical solutions, the battery module further includes a connection bar, sampling terminals, and auxiliary fastening components; wherein, any two adjacent cells in each cell assembly are electrically connected through the connection bar, and any two adjacent cell assemblies are also electrically connected through the connection bar;

[0013] The connecting bar is connected to the terminal of the battery cell by welding, and the connecting bar forms an arched structure. The sampling terminal is locked onto the arched structure by the auxiliary fastening member.

[0014] In any of the above technical solutions, an insulating film is further provided between the side plate and the adjacent battery cell, and the insulating film is connected to the side plate and the battery cell by adhesive.

[0015] In any of the above technical solutions, the battery module further includes foam and an insulating film disposed between the end plate and the adjacent battery cell, and the end plate, the foam, the insulating film and the battery cell are sequentially pasted together.

[0016] In any of the above technical solutions, the battery module further includes an insulating cover plate, which is installed on the top of the plurality of battery cell assemblies along their height direction, and the two ends of the insulating cover plate are detachably connected to the two end plates respectively by a sixth fastening member.

[0017] In any of the above technical solutions, further, along the height direction of the battery cell, the bottom of multiple battery cell assemblies shares a common insulating film, and the insulating film is bonded to the battery cell.

[0018] In any of the above technical solutions, both the end plate and the side plate are sheet metal parts.

[0019] This application also provides an energy storage battery module, which includes the battery module described in any of the above technical solutions, and thus has all the beneficial technical effects of the battery module, which will not be repeated here.

[0020] Compared with the prior art, the beneficial effects of this application are as follows:

[0021] This application provides a novel battery module in which multiple rows of cells share two end plates and two side plates, forming a single assembly. This eliminates the need for separate assembly and subsequent splicing, simplifying the operation process, improving production efficiency, saving on component input, and reducing production costs. Furthermore, the side plates and end plates used in this application provide a larger contact area between the end plates / side plates and the cells compared to the previous binding method, resulting in better cell fixation, higher overall strength, better shock resistance, less susceptibility to damage, and a longer service life.

[0022] Furthermore, this battery module boasts high structural strength, simple assembly, low production line requirements, and ease of maintenance. Additionally, the end plates in this battery module utilize either long or short bolts for installation, minimizing the requirements for the external casing.

[0023] In addition, the positive and negative terminals of the module are brought out from the original end plate, that is, from the original end plate to the side plate. This makes it easier to design the whole machine, and makes full use of the spare space on the side plate to bring out the positive and negative terminals. This makes the layout more convenient, and there is no need to design specific avoidance space, thus reducing design investment.

[0024] In addition, the end plates and side plates are all sheet metal parts. Sheet metal parts are simple and convenient to form, have reliable structures, and low costs. Therefore, unlike die-casting parts and injection molded parts, they do not require mold opening, thus saving mold opening costs. Attached Figure Description

[0025] 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.

[0026] Figure 1 An exploded view of the battery module provided in the embodiments of this application;

[0027] Figure 2 An assembly diagram of the battery module provided in the embodiments of this application;

[0028] Figure 3 This is another assembly diagram of the battery module provided in the embodiments of this application;

[0029] Figure 4 for Figure 3 A partially enlarged structural diagram;

[0030] Figure 5 This is another assembly diagram of the battery module provided in the embodiments of this application;

[0031] Figure 6 This is a schematic diagram of the end plate provided in an embodiment of this application;

[0032] Figure 7 This is another structural schematic diagram of the end plate provided in an embodiment of this application.

[0033] Figure label:

[0034] 1-Battery cell assembly, 101-Battery cell, 2-End plate, 3-Side plate, 31-Support plate, 4-First flange, 5-First fastening component, 6-Second flange, 7-Second fastening component, 8-Third flange, 9-Third fastening component, 10-Fourth flange, 11-Fourth fastening component, 12-Fifth flange, 13-Total positive output component, 14-Total negative output component, 15-Insulating base, 16-Fifth fastening component, 17-Sixth fastening component, 18-Connecting bar, 181-Arch structure, 19-Sampling terminal, 20-Auxiliary fastening component, 21-Foam, 22-Insulating film, 23-Insulating cover plate, a-First preset direction, b-Second preset direction. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] 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.

[0039] 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.

[0040] The following reference Figures 1 to 7 This application describes a battery module and energy storage battery module according to some embodiments.

[0041] Example 1

[0042] See Figures 1 to 5 As shown, an embodiment of this application provides a battery module, including: multiple cell assemblies 1, two end plates 2 and two side plates 3; wherein, the multiple cell assemblies 1 are arranged sequentially along a first preset direction a, and each cell assembly 1 includes multiple cells 101 arranged sequentially along a second preset direction b;

[0043] Multiple battery cell assemblies 1 share two end plates 2, and along the second preset direction b, the two end plates 2 are respectively disposed at opposite ends of the multiple battery cell assemblies 1; along the first preset direction a, two side plates 3 are disposed on opposite sides of the assembly of the multiple battery cell assemblies 1 and the two end plates 2, and the two side plates 3 are connected to the two end plates 2.

[0044] As can be seen from the structure described above, the multi-row battery cells 101 share two end plates 2 and two side plates 3, forming a group together. This eliminates the need for separate grouping and subsequent assembly, simplifying the operation steps, improving production efficiency, saving on component input, and reducing production costs. Furthermore, the method of fixing with side plates 3 and end plates 2 in this application provides a larger contact area between the end plates 2 and side plates 3 and the battery cells 101 compared to the previous binding method. This results in a better fixing effect for the battery cells 101, higher overall strength, better shock resistance, less susceptibility to damage, and a longer service life.

[0045] In this embodiment, preferably, as follows: Figure 4 , Figure 6 and Figure 7 As shown, a first flange 4 is formed on one side of the end plate 2, extending toward the side away from the battery cell 101, and the first flange 4 abuts against one of the side plates 3 and is connected by a first fastening member 5, such as a screw or bolt.

[0046] As can be seen from the structure described above, the first flange 4 can abut against the corresponding side plate 3 and provides an installation position for the first fastening component 5, such as screws or bolts, making it easier to operate.

[0047] Furthermore, preferably, the end plate 2 is a flat plate structure, the first flange 4 is a flat plate structure, and the two form an L-shaped bending structure.

[0048] In this embodiment, preferably, as follows: Figure 4 and Figure 6 As shown, a second flange 6 is formed on the other side of the end plate 2, extending toward the side away from the battery cell 101, and the second flange 6 abuts against the other side plate 3 and is connected by a second fastening member 7, such as a screw or bolt.

[0049] As can be seen from the structure described above, the second flange 6 can abut against the corresponding side plate 3 and provides an installation position for installing the second fastening component 7, such as screws or bolts, making it easier to operate.

[0050] Furthermore, preferably, the second flange 6 is a flat plate structure, and it forms an L-shaped bending structure with the flat end plate 2.

[0051] In this embodiment, preferably, as follows: Figure 4 and Figure 6 As shown, the end plate 2 has a third flange portion 8 and a fourth flange portion 10 extending toward the side opposite to the battery cell 101 on its front side, and the third flange portion 8 and the fourth flange portion 10 are arranged sequentially from bottom to top along the height direction of the end plate 2; the third flange portion 8 can be connected to the first target object by the third fastening member 9, and the fourth flange portion 10 can be connected to the second target object by the third fastening member 9.

[0052] As can be seen from the structure described above, two flanged parts, namely the third flanged part 8 and the fourth flanged part 10, are provided on the large side of the end plate 2. For the third flanged part 8, which is in a higher position, a longer third fastening member 9, such as a long bolt, can be installed and the long bolt is locked to the bottom plate of the first target location, such as the lower housing of the energy storage battery module. For the fourth flanged part 10, which is in a lower position, a longer fourth fastening member 11, such as a short bolt, can be installed and the short bolt is locked to the fixing beam of the second target location, such as the lower housing of the energy storage battery module, etc., so that the end plate 2 is firmly locked to the lower housing of the energy storage battery module. Moreover, through the cooperation of long and short bolts, the requirements for the lower housing are lower and the reinforcement effect is better.

[0053] Furthermore, preferably, the third flange portion 8 is a flat plate structure, and it forms an L-shaped bending structure with the flat end plate 2. Preferably, the side of the third flange portion 8 away from the end plate 2 is also connected to a fifth flange portion 12, and the fifth flange portion 12 is a flat plate structure, which forms an L-shaped bending structure with the third flange portion 8.

[0054] Furthermore, preferably, the fourth flange 10 is a flat plate structure, and it forms an L-shaped bending structure with the flat end plate 2.

[0055] As can be seen from the above, the flat end plate 2, together with the flat first flange 4, second flange 6, third flange 8, fourth flange 10 and fifth flange 12, form a shell-like structure, which satisfies the assembly with the side plate 3 and the lower shell, and also contributes to lightweight design.

[0056] It should be noted that the aforementioned flanged part can be omitted, and the flat end plate 2 can be simply thickened. This can also meet the assembly requirements, but the weight will be relatively heavy.

[0057] In this embodiment, preferably, as follows: Figure 2 , Figure 3 and Figure 5As shown, the battery module also includes a total positive output component 13 and a total negative output component 14; wherein, along the first preset direction a, the total positive output component 13 and the total negative output component 14 are both disposed on the same side of the first cell assembly 1 or the last cell assembly 1, and the total positive output component 13 and the total negative output component 14 extend along the first preset direction a.

[0058] As can be seen from the structure described above, the positive and negative terminals of the module are brought out from the original end plate 2, that is, the positive and negative terminals of the module are brought out from the original end plate and the end plate, which is changed to the side plate. This makes it easier to design the whole machine in the future. Moreover, it makes full use of the empty space on the side plate to bring out the positive and negative terminals, making the layout more convenient. There is no need to design a space to avoid the obstacles, which reduces the design investment.

[0059] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the battery module also includes two insulating seats 15. A support plate 31 is formed on the side plate 3 located on the same side as the total positive output component 13 and the total negative output component 14. The support plate 31 extends toward the side away from the cell assembly 1, and both insulating seats 15 are disposed on the support plate 31. The total positive output component 13 is locked to one of the insulating seats 15 by a fifth fastening member 16, such as a screw or bolt, and the total negative output component 14 is locked to the other insulating seat 15 by a sixth fastening member 17, such as a screw or bolt.

[0060] As can be seen from the structure described above, it is only necessary to support the plate 31 at the bend of the side plate 3 and fix the positive and negative terminals on the insulating seat 15 on the support plate 31. The structure is relatively simple and easy to install and disassemble.

[0061] Furthermore, preferably, the insulating base 15 can be an insulator from the prior art, which is a standard part and does not require separate processing and manufacturing; it only needs to be purchased. Of course, it is not limited to this.

[0062] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, along the second preset direction b, the total positive output component 13 and the total negative output component 14 are arranged sequentially at intervals, making the arrangement more regular. Furthermore, the total positive output component 13 and the total negative output component 14 are located in the area between the two ends of the battery cell assembly 1, avoiding the installation inconvenience and interference problems caused by setting them near the beginning and end.

[0063] In this embodiment, preferably, as follows: Figure 3As shown, the battery module also includes a connection bar 18, a sampling terminal 19, and an auxiliary fastening component 20; wherein, any two adjacent cells 101 in each cell assembly 1 are electrically connected through the connection bar 18, and any two adjacent cell assemblies 1 are also electrically connected through the connection bar 18. It should be noted that there are multiple connection bars 18, and the connection bars 18 mentioned above refer to different connection bars 18.

[0064] The connecting strip 18 is connected to the terminal of the battery cell 101 by welding. The welded structure is more robust and the operation is simple and convenient. The connecting strip 18 forms an arched structure 181, which can absorb a certain amount of deformation and protect the weld from being damaged by the expansion during battery use. The sampling terminal 19 is locked to the arched structure 181 by an auxiliary fastening component 20, such as a nut. Preferably, the arched structure 181 is pre-loaded with a nut. The sampling terminal 19, such as a voltage / temperature sampling terminal 19, can be locked together with the aforementioned pre-loaded nut by bolts, thereby fixing the sampling terminal 19 to the connecting strip 18. The structure is simple, low-cost, and easy to maintain.

[0065] In this embodiment, preferably, as follows: Figure 1 As shown, the battery module also includes foam 21 and insulating film 22 disposed between the end plate 2 and the adjacent battery cell 101, and the end plate 2, foam 21, insulating film 22 and battery cell 101 are sequentially pasted together.

[0066] As can be seen from the structure described above, the foam 21 can absorb the expansion of the battery cell 101 and eliminate the dimensional tolerances when the battery cells 101 are stacked and installed. The foam 21 is surrounded by an end plate 2, which can be made of high-strength steel plate and preferably can be made by sheet metal process; the insulating film 22 plays the role of insulation and protection.

[0067] In this embodiment, preferably, as follows: Figure 1 As shown, the battery module also includes an insulating cover plate 23, which is mounted on the top of the plurality of cell assemblies 1 along their height direction, and the two ends of the insulating cover plate 2 are detachably connected to the two end plates 2 by a sixth fastening member, such as a plastic rivet.

[0068] As can be seen from the structure described above, the cover plate seals the top of multiple battery cell components 1, which serves as insulation and protection, and improves the safety and reliability of the battery module.

[0069] In this embodiment, preferably, as follows: Figure 1 As shown, along the height direction of the battery cell 101, the bottom of multiple battery cell assemblies 1 share a common insulating film 22, and the insulating film 22 is bonded to the battery cell 101, and the insulating film 22 plays the role of insulation and protection.

[0070] In this embodiment, preferably, as follows: Figure 1 As shown, end plate 2 and side plate 3 are both sheet metal parts. Sheet metal parts are simple and convenient to form, have reliable structure and low cost. Therefore, unlike die-casting parts and injection molded parts, they do not require mold opening, thus saving the cost of mold opening.

[0071] Example 2

[0072] Embodiment 2 of this application also provides an energy storage battery module, which includes the battery module described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the battery module. The same technical features and beneficial effects will not be repeated here.

[0073] 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. A battery module, characterized by, include: The battery cell assembly comprises multiple battery cell components, two end plates, and two side plates; wherein, the multiple battery cell components are arranged sequentially along a first preset direction, and each battery cell component includes multiple battery cells arranged sequentially along a second preset direction. The multiple battery cell assemblies share two end plates, and along the second preset direction, the two end plates are respectively disposed at opposite ends of the multiple battery cell assemblies; along the first preset direction, two side plates are disposed on opposite sides of the assembly of the multiple battery cell assemblies and the two end plates, and the two side plates are connected to the two end plates.

2. The battery module of claim 1, wherein, One side of the end plate is formed with a first flange extending toward the side away from the battery cell, and the first flange abuts against one of the side plates and is connected by a first fastening member.

3. The battery module according to claim 1, characterized in that, The other side of the end plate is formed with a second flange extending toward the side opposite to the battery cell, and the second flange abuts against the other side plate and is connected by a second fastening member.

4. The battery module according to claim 1, characterized in that, The end plate has a third flange and a fourth flange extending toward the side opposite to the battery cell on its front side, and the third flange and the fourth flange are arranged sequentially from bottom to top along the height direction of the end plate; the third flange can be connected to a first target object by a third fastening member, and the fourth flange can be connected to a second target object by a fourth fastening member.

5. The battery module according to claim 1, characterized in that, The battery module further includes a total positive output component and a total negative output component; wherein, along the first preset direction, the total positive output component and the total negative output component are both disposed on the same side of the first battery cell assembly or the last battery cell assembly, and the total positive output component and the total negative output component extend along the first preset direction.

6. The battery module according to claim 5, characterized in that, The battery module further includes two insulating bases. A support plate is formed on the side plate located on the same side as the total positive output component and the total negative output component, and the support plate extends away from the battery cell assembly. Both insulating bases are disposed on the support plate. The total positive output component is locked to one of the insulating bases by a fifth fastening member, and the total negative output component is locked to the other insulating base by a sixth fastening member; and / or Along the second preset direction, the total positive output component and the total negative output component are arranged sequentially at intervals, and the total positive output component and the total negative output component are located in the region between the two ends of the cell assembly.

7. The battery module according to claim 1, characterized in that, The battery module also includes a connection bar, sampling terminals, and auxiliary fastening components; wherein, any two adjacent cells in each cell assembly are electrically connected through the connection bar, and any two adjacent cell assemblies are also electrically connected through the connection bar; The connecting bar is connected to the terminal of the battery cell by welding, and the connecting bar forms an arched structure. The sampling terminal is locked onto the arched structure by the auxiliary fastening member.

8. The battery module according to claim 1, characterized in that, An insulating film is provided between the side plate and the adjacent battery cell, and the insulating film is connected to the side plate and the battery cell by adhesive.

9. The battery module according to any one of claims 1 to 8, characterized in that, The battery module further includes foam and an insulating film disposed between the end plate and the adjacent battery cell, and the end plate, the foam, the insulating film, and the battery cell are sequentially bonded together; and / or The battery module further includes an insulating cover plate, which is mounted on the top of the plurality of battery cell assemblies along their height direction, and both ends of the insulating cover plate are detachably connected to the two end plates via a sixth fastening member; and / or Along the height direction of the battery cell, the bottom of multiple battery cell assemblies shares a common insulating film, and the insulating film is bonded to the battery cell; and / or Both the end plate and the side plate are sheet metal parts.

10. An energy storage battery module, characterized in that, The battery module includes any one of claims 1 to 9.

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